From 6dd41eaf0620f0fbe1ced48a5bb773957bcaa29d Mon Sep 17 00:00:00 2001
From: Akash Yadav <itsaky01@gmail.com>
Date: Wed, 2 Feb 2022 09:32:54 +0530
Subject: [PATCH] Updated editor

---
 .idea/misc.xml                                |   17 +
 app/build.gradle                              |    1 +
 .../main/assets/data/common/gradle-plugin.zip |  Bin 37274 -> 37274 bytes
 .../com/itsaky/androidide/EditorActivity.java |   17 +-
 .../com/itsaky/androidide/MainActivity.java   |   12 +-
 .../adapters/CompletionListAdapter.java       |   14 +-
 .../adapters/SymbolInputAdapter.java          |   90 +-
 .../fragments/FileTreeFragment.java           |    3 +-
 .../androidide/fragments/LogViewFragment.java |   12 +-
 .../fragments/NonEditableEditorFragment.java  |   10 +-
 .../fragments/SimpleOutputFragment.java       |    4 +-
 .../fragments/sheets/TextSheetFragment.java   |   47 +-
 .../androidide/language/BaseLanguage.java     |    4 +-
 .../language/CommonCompletionProvider.java    |   35 +-
 .../language/groovy/GroovyAnalyzer.java       |  107 +-
 .../language/groovy/GroovyAutoComplete.java   |  259 +-
 .../language/groovy/GroovyLanguage.java       |   94 +-
 .../language/java/JavaAnalyzer.java           |  366 +-
 .../language/java/JavaLanguage.java           |  111 +-
 .../language/logs/LogLanguageImpl.java        |   65 +-
 .../androidide/language/xml/XMLAnalyzer.java  |   99 +-
 .../androidide/language/xml/XMLLanguage.java  |   73 +-
 .../androidide/lsp/IDELanguageClientImpl.java |  120 +-
 .../com/itsaky/androidide/models/LogLine.java |   21 +-
 .../syntax/colorschemes/SchemeAndroidIDE.java |  104 +-
 .../syntax/highlighters/JavaHighlighter.java  |   12 +-
 .../utils/RecursiveFileSearcher.java          |    7 +-
 .../com/itsaky/androidide/views/Editor.java   |   45 -
 .../androidide/views/SymbolInputView.java     |   30 +-
 .../views/{ => editor}/CodeEditorView.java    |  785 +--
 .../androidide/views/editor/IDEEditor.java    |  612 ++
 .../views/editor/SignatureHelpWindow.java     |  165 +
 .../editor/annotations/Experimental.java      |   32 -
 .../interfaces/AutoCompleteProvider.java      |   46 -
 .../editor/interfaces/CodeAnalyzer.java       |   68 -
 .../interfaces/EditorEventListener.java       |   71 -
 .../editor/interfaces/EditorLanguage.java     |   98 -
 .../editor/interfaces/NewlineHandler.java     |   64 -
 .../editor/langs/AbstractCodeAnalyzer.java    |   68 -
 .../rosemoe/editor/langs/EmptyLanguage.java   |   99 -
 .../rosemoe/editor/struct/BlockLine.java      |   45 -
 .../rosemoe/editor/struct/NavigationItem.java |   47 -
 .../io/github/rosemoe/editor/struct/Span.java |  142 -
 .../github/rosemoe/editor/text/Content.java   |  836 ---
 .../github/rosemoe/editor/text/FontCache.java |  128 -
 .../rosemoe/editor/text/FormatThread.java     |   61 -
 .../github/rosemoe/editor/text/Indexer.java   |   69 -
 .../editor/text/LineRemoveListener.java       |   33 -
 .../rosemoe/editor/text/NoCacheIndexer.java   |   42 -
 .../rosemoe/editor/text/ObjectAllocator.java  |   54 -
 .../editor/text/TextAnalyzeResult.java        |  253 -
 .../rosemoe/editor/text/TextAnalyzer.java     |  274 -
 .../github/rosemoe/editor/util/IntPair.java   |   65 -
 .../rosemoe/editor/util/LongArrayList.java    |   54 -
 .../github/rosemoe/editor/util/Objects.java   |   36 -
 .../rosemoe/editor/widget/AbstractLayout.java |   91 -
 .../rosemoe/editor/widget/CodeEditor.java     | 5058 ----------------
 .../rosemoe/editor/widget/CursorBlink.java    |   74 -
 .../widget/DefaultCompletionItemAdapter.java  |   70 -
 .../widget/EditorAutoCompleteWindow.java      |  361 --
 .../editor/widget/EditorBasePopupWindow.java  |  125 -
 .../widget/EditorTextActionModeStarter.java   |  260 -
 .../editor/widget/EditorTextActionWindow.java |  196 -
 .../rosemoe/editor/widget/KeyMetaStates.java  |   57 -
 .../io/github/rosemoe/editor/widget/Row.java  |   48 -
 .../rosemoe/editor/widget/RowIterator.java    |   47 -
 .../rosemoe/editor/widget/SymbolChannel.java  |   62 -
 .../editor/widget/SymbolPairMatch.java        |  107 -
 .../editor/widget/TextActionPopupWindow.java  |  188 -
 .../editor/widget/TextComposeBasePopup.java   |  150 -
 app/src/main/res/layout/activity_editor.xml   |   20 +-
 .../layout/fragment_non_editable_editor.xml   |    2 +-
 .../main/res/layout/layout_code_editor.xml    |    2 +-
 .../utils/CharSequenceInputStream.java        |  277 +
 .../androidide/utils/ReaderInputStream.java   |  331 ++
 editor/.gitignore                             |    1 +
 editor/build.gradle                           |   45 +
 editor/consumer-rules.pro                     |    0
 editor/proguard-rules.pro                     |   21 +
 .../rosemoe/sora/ExampleInstrumentedTest.java |   43 +
 editor/src/main/AndroidManifest.xml           |   28 +
 .../sora/annotations/Experimental.java        |   40 +
 .../annotations/UnsupportedUserUsage.java     |   38 +
 .../rosemoe/sora/data/NavigationItem.java     |   55 +
 .../rosemoe/sora/data/ObjectAllocator.java    |   82 +
 .../github/rosemoe/sora/event/ClickEvent.java |   79 +
 .../sora/event/ContentChangeEvent.java        |  105 +
 .../io/github/rosemoe/sora/event/Event.java   |   98 +
 .../rosemoe/sora/event/EventManager.java      |  205 +
 .../rosemoe/sora/event/EventReceiver.java     |   30 +
 .../sora/event/HandleStateChangeEvent.java    |   53 +
 .../rosemoe/sora/event/LongPressEvent.java    |   84 +
 .../rosemoe/sora/event/ScrollEvent.java       |  108 +
 .../sora/event/SelectionChangeEvent.java      |  111 +
 .../rosemoe/sora/event/Unsubscribe.java       |   59 +
 .../sora/graphics/BufferedDrawPoints.java     |   59 +
 .../rosemoe/sora/graphics/GraphicTextRow.java |  301 +
 .../github/rosemoe/sora/graphics/Paint.java   |  102 +
 .../sora/interfaces/ExternalRenderer.java     |   68 +
 .../rosemoe/sora/lang/EmptyLanguage.java      |  129 +
 .../io/github/rosemoe/sora/lang/Language.java |  165 +
 .../sora/lang/analysis/AnalyzeManager.java    |   95 +
 .../AsyncIncrementalAnalyzeManager.java       |  475 ++
 .../analysis/IncrementalAnalyzeManager.java   |  102 +
 .../lang/analysis/SimpleAnalyzeManager.java   |  231 +
 .../sora/lang/analysis/StyleReceiver.java     |   45 +
 .../UIThreadIncrementalAnalyzeManager.java    |  156 +
 .../CompletionCancelledException.java         |   43 +
 .../lang/completion/CompletionHelper.java     |   71 +
 .../sora/lang/completion/CompletionItem.java  |  105 +
 .../lang/completion/CompletionPublisher.java  |  276 +
 .../completion/IdentifierAutoComplete.java    |  155 +
 .../lang/completion/SimpleCompletionItem.java |  101 +
 .../lang/smartEnter/NewlineHandleResult.java  |   46 +
 .../sora/lang/smartEnter/NewlineHandler.java  |   49 +
 .../sora/lang/styling/BlocksUpdater.java      |   58 +
 .../rosemoe/sora/lang/styling/CodeBlock.java  |   96 +
 .../sora/lang/styling/EmptyReader.java        |   61 +
 .../sora/lang/styling/ExternalRenderer.java   |   68 +
 .../sora/lang/styling/MappedSpanUpdater.java  |  114 +-
 .../sora/lang/styling/MappedSpans.java        |  309 +
 .../rosemoe/sora/lang/styling/Span.java       |  215 +
 .../rosemoe/sora/lang/styling/Spans.java      |   91 +
 .../rosemoe/sora/lang/styling/Styles.java     |  155 +
 .../rosemoe/sora/lang/styling/TextStyle.java  |  142 +
 .../rosemoe/sora}/text/CachedIndexer.java     |  170 +-
 .../rosemoe/sora}/text/CharPosition.java      |   63 +-
 .../sora/text/CharSequenceIterator.java       |  108 +
 .../io/github/rosemoe/sora/text/Content.java  |  874 +++
 .../rosemoe/sora}/text/ContentLine.java       |   50 +-
 .../rosemoe/sora}/text/ContentListener.java   |   46 +-
 .../rosemoe/sora/text/ContentReference.java   |  174 +
 .../io/github/rosemoe/sora}/text/Cursor.java  |  252 +-
 .../rosemoe/sora/text/FormatThread.java       |   69 +
 .../io/github/rosemoe/sora/text/ICUUtils.java |   77 +
 .../io/github/rosemoe/sora/text/Indexer.java  |   91 +
 .../sora}/text/LineNumberCalculator.java      |   30 +-
 .../rosemoe/sora/text/LineRemoveListener.java |   41 +
 .../rosemoe/sora/text/NoCacheIndexer.java     |   50 +
 .../rosemoe/sora}/text/SpanRecycler.java      |   49 +-
 .../rosemoe/sora/text/TextLayoutHelper.java   |   86 +
 .../rosemoe/sora/text/TextReference.java      |  125 +
 .../github/rosemoe/sora}/text/TextUtils.java  |   35 +-
 .../rosemoe/sora}/text/UndoManager.java       |   65 +-
 .../github/rosemoe/sora/util/ArrayList.java   |   46 +
 .../github/rosemoe/sora}/util/BinaryHeap.java |   34 +-
 .../io/github/rosemoe/sora/util/IntPair.java  |   73 +
 .../rosemoe/sora/util/LongArrayList.java      |   62 +
 .../github/rosemoe/sora/util/MyCharacter.java |  119 +
 .../io/github/rosemoe/sora/util/Numbers.java  |  113 +
 .../sora/util/TemporaryCharBuffer.java        |   52 +
 .../sora/util/TemporaryFloatBuffer.java       |   53 +
 .../github/rosemoe/sora/util/ThemeUtils.java  |   37 +
 .../io/github/rosemoe/sora/util/TrieTree.java |  178 +
 .../rosemoe/sora/widget/CodeEditor.java       | 5059 +++++++++++++++++
 .../rosemoe/sora/widget/CursorAnimator.java   |  114 +
 .../rosemoe/sora/widget/CursorBlink.java      |  100 +
 .../sora/widget/DirectAccessProps.java        |  146 +
 .../sora}/widget/EditorInputConnection.java   |  120 +-
 .../rosemoe/sora}/widget/EditorSearcher.java  |   36 +-
 .../sora}/widget/EditorTouchEventHandler.java |  503 +-
 .../sora/widget/HwAcceleratedRenderer.java    |  186 +
 .../rosemoe/sora/widget/KeyMetaStates.java    |   66 +
 .../sora}/widget/MaterialEdgeEffect.java      |   30 +-
 .../rosemoe/sora/widget/SymbolInputView.java  |  110 +
 .../rosemoe/sora/widget/SymbolPairMatch.java  |  179 +
 .../sora/widget/base/EditorPopupWindow.java   |  286 +
 .../DefaultCompletionItemAdapter.java         |   70 +
 .../component/EditorAutoCompletion.java       |  429 ++
 .../component/EditorBuiltinComponent.java     |   43 +
 .../component}/EditorCompletionAdapter.java   |   55 +-
 .../component/EditorTextActionWindow.java     |  235 +
 .../sora/widget/component/Magnifier.java      |  277 +
 .../sora/widget/layout/AbstractLayout.java    |   83 +
 .../rosemoe/sora/widget/layout}/Layout.java   |   43 +-
 .../sora/widget/layout}/LineBreakLayout.java  |   80 +-
 .../rosemoe/sora/widget/layout/Row.java       |   56 +
 .../sora/widget/layout/RowIterator.java       |   63 +
 .../sora/widget/layout}/WordwrapLayout.java   |  108 +-
 .../widget/schemes}/EditorColorScheme.java    |  293 +-
 .../sora/widget/schemes/SchemeDarcula.java    |   62 +
 .../sora/widget/schemes/SchemeEclipse.java    |   58 +
 .../sora/widget/schemes/SchemeGitHub.java     |   52 +
 .../sora/widget/schemes/SchemeNotepadXX.java  |   58 +
 .../sora/widget/schemes/SchemePurple.java     |   56 +
 .../sora/widget/schemes/SchemeVS2019.java     |   62 +
 .../widget/style/SelectionHandleStyle.java    |   91 +
 .../widget/style/builtin/HandleStyleDrop.java |   63 +
 .../style/builtin/HandleStyleSideDrop.java    |   60 +
 .../res/drawable/ic_more_vert_black_20dp.xml  |   28 +
 .../main/res/drawable/ic_sora_handle_drop.xml |   40 +
 .../res/drawable/magnifier_background.xml     |   28 +
 .../res/drawable/round_content_copy_20.xml    |   35 +
 .../res/drawable/round_content_cut_20.xml     |   38 +
 .../res/drawable/round_content_paste_20.xml   |   35 +
 .../src/main/res/drawable/round_save_20.xml   |   34 +
 .../main/res/drawable/round_select_all_20.xml |   83 +
 .../layout/default_completion_result_item.xml |   70 +
 .../src/main/res/layout/magnifier_popup.xml   |   37 +
 .../main/res/layout/text_compose_panel.xml    |   97 +
 editor/src/main/res/values-zh/strings.xml     |   37 +
 editor/src/main/res/values/attrs.xml          |   41 +
 editor/src/main/res/values/colors.xml         |   27 +
 editor/src/main/res/values/dimens.xml         |   27 +
 editor/src/main/res/values/strings.xml        |   43 +
 editor/src/main/res/values/style.xml          |   88 +
 .../github/rosemoe/sora/ExampleUnitTest.java  |   20 +-
 .../itsaky/androidide/lexers/xml/XMLLexer.g4  |    1 +
 .../androidide/lexers/xml/XMLLexer.interp     |    5 +-
 .../androidide/lexers/xml/XMLLexer.java       |  181 +-
 .../androidide/lexers/xml/XMLLexer.tokens     |   52 +-
 .../itsaky/androidide/lexers/xml/XMLParser.g4 |   51 +
 .../androidide/lexers/xml/XMLParser.interp    |   62 +
 .../androidide/lexers/xml/XMLParser.java      |  914 +++
 .../androidide/lexers/xml/XMLParser.tokens    |   27 +
 .../lexers/xml/XMLParserBaseListener.java     |  171 +
 .../lexers/xml/XMLParserBaseVisitor.java      |   91 +
 .../lexers/xml/XMLParserListener.java         |  120 +
 .../lexers/xml/XMLParserVisitor.java          |   79 +
 lsp/api/build.gradle                          |    4 +
 ...Analyzer.java => IDiagnosticProvider.java} |   10 +-
 .../com/itsaky/lsp/api/ILanguageServer.java   |    2 +-
 .../java/com/itsaky/lsp/models/Completions.kt |  114 +-
 .../java/com/itsaky/lsp/models/Diagnostics.kt |    4 +-
 .../com/itsaky/lsp/models/TextDocument.kt     |    2 +-
 .../NoDiagnosticProvider.kt}                  |   12 +-
 lsp/java/build.gradle                         |    3 +-
 .../java/com/itsaky/lsp/java/FileStore.java   |   19 +-
 .../itsaky/lsp/java/JavaLanguageServer.java   |   13 +-
 .../lsp/java/compiler/CompileBatch.java       |    6 +-
 ...lyzer.java => JavaDiagnosticProvider.java} |   24 +-
 .../com/itsaky/lsp/java/utils/EditHelper.java |    2 +-
 .../itsaky/lsp/java/utils/StringSearch.java   |   81 +-
 .../java/visitors/SemanticHighlighter.java    |    6 +-
 lsp/xml/build.gradle                          |    2 +
 .../java/com/itsaky/lsp/xml/XMLFileStore.java |  116 -
 .../com/itsaky/lsp/xml/XMLLanguageServer.java |    9 +-
 settings.gradle                               |    1 +
 238 files changed, 22221 insertions(+), 12245 deletions(-)
 delete mode 100755 app/src/main/java/com/itsaky/androidide/views/Editor.java
 rename app/src/main/java/com/itsaky/androidide/views/{ => editor}/CodeEditorView.java (78%)
 create mode 100644 app/src/main/java/com/itsaky/androidide/views/editor/IDEEditor.java
 create mode 100644 app/src/main/java/com/itsaky/androidide/views/editor/SignatureHelpWindow.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/annotations/Experimental.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/interfaces/AutoCompleteProvider.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/interfaces/CodeAnalyzer.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/interfaces/EditorEventListener.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/interfaces/EditorLanguage.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/interfaces/NewlineHandler.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/langs/AbstractCodeAnalyzer.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/langs/EmptyLanguage.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/struct/BlockLine.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/struct/NavigationItem.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/struct/Span.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/Content.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/FontCache.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/FormatThread.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/Indexer.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/LineRemoveListener.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/NoCacheIndexer.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/ObjectAllocator.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzeResult.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzer.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/util/IntPair.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/util/LongArrayList.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/util/Objects.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/AbstractLayout.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/CodeEditor.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/CursorBlink.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/DefaultCompletionItemAdapter.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/EditorAutoCompleteWindow.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/EditorBasePopupWindow.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionModeStarter.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionWindow.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/KeyMetaStates.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/Row.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/RowIterator.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/SymbolChannel.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/SymbolPairMatch.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/TextActionPopupWindow.java
 delete mode 100755 app/src/main/java/io/github/rosemoe/editor/widget/TextComposeBasePopup.java
 create mode 100644 common/src/main/java/com/itsaky/androidide/utils/CharSequenceInputStream.java
 create mode 100644 common/src/main/java/com/itsaky/androidide/utils/ReaderInputStream.java
 create mode 100644 editor/.gitignore
 create mode 100644 editor/build.gradle
 create mode 100644 editor/consumer-rules.pro
 create mode 100644 editor/proguard-rules.pro
 create mode 100644 editor/src/androidTest/java/io/github/rosemoe/sora/ExampleInstrumentedTest.java
 create mode 100644 editor/src/main/AndroidManifest.xml
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/annotations/Experimental.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/annotations/UnsupportedUserUsage.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/data/NavigationItem.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/data/ObjectAllocator.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/ClickEvent.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/ContentChangeEvent.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/Event.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/EventManager.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/EventReceiver.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/HandleStateChangeEvent.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/LongPressEvent.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/ScrollEvent.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/SelectionChangeEvent.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/event/Unsubscribe.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/graphics/BufferedDrawPoints.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/graphics/GraphicTextRow.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/graphics/Paint.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/interfaces/ExternalRenderer.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/EmptyLanguage.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/Language.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AnalyzeManager.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AsyncIncrementalAnalyzeManager.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/analysis/IncrementalAnalyzeManager.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/analysis/SimpleAnalyzeManager.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/analysis/StyleReceiver.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/analysis/UIThreadIncrementalAnalyzeManager.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionCancelledException.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionHelper.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionItem.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionPublisher.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/completion/IdentifierAutoComplete.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/completion/SimpleCompletionItem.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandleResult.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandler.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/BlocksUpdater.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/CodeBlock.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/EmptyReader.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/ExternalRenderer.java
 rename app/src/main/java/io/github/rosemoe/editor/text/SpanMapUpdater.java => editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpanUpdater.java (62%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpans.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/Span.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/Spans.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/Styles.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/lang/styling/TextStyle.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/CachedIndexer.java (77%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/CharPosition.java (53%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/CharSequenceIterator.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/Content.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/ContentLine.java (88%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/ContentListener.java (57%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/ContentReference.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/Cursor.java (57%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/FormatThread.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/ICUUtils.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/Indexer.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/LineNumberCalculator.java (62%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/LineRemoveListener.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/NoCacheIndexer.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/SpanRecycler.java (50%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/TextLayoutHelper.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/text/TextReference.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/TextUtils.java (50%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/text/UndoManager.java (88%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/ArrayList.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/util/BinaryHeap.java (82%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/IntPair.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/LongArrayList.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/MyCharacter.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/Numbers.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/TemporaryCharBuffer.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/TemporaryFloatBuffer.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/ThemeUtils.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/util/TrieTree.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/CodeEditor.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/CursorAnimator.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/CursorBlink.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/DirectAccessProps.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/widget/EditorInputConnection.java (78%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/widget/EditorSearcher.java (78%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/widget/EditorTouchEventHandler.java (62%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/HwAcceleratedRenderer.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/KeyMetaStates.java
 rename {app/src/main/java/io/github/rosemoe/editor => editor/src/main/java/io/github/rosemoe/sora}/widget/MaterialEdgeEffect.java (89%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/SymbolInputView.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/SymbolPairMatch.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/base/EditorPopupWindow.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/component/DefaultCompletionItemAdapter.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorAutoCompletion.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorBuiltinComponent.java
 rename {app/src/main/java/io/github/rosemoe/editor/widget => editor/src/main/java/io/github/rosemoe/sora/widget/component}/EditorCompletionAdapter.java (50%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorTextActionWindow.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/component/Magnifier.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/layout/AbstractLayout.java
 rename {app/src/main/java/io/github/rosemoe/editor/widget => editor/src/main/java/io/github/rosemoe/sora/widget/layout}/Layout.java (62%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor/widget => editor/src/main/java/io/github/rosemoe/sora/widget/layout}/LineBreakLayout.java (58%)
 mode change 100755 => 100644
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/layout/Row.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/layout/RowIterator.java
 rename {app/src/main/java/io/github/rosemoe/editor/widget => editor/src/main/java/io/github/rosemoe/sora/widget/layout}/WordwrapLayout.java (69%)
 mode change 100755 => 100644
 rename {app/src/main/java/io/github/rosemoe/editor/syntax => editor/src/main/java/io/github/rosemoe/sora/widget/schemes}/EditorColorScheme.java (55%)
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeDarcula.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeEclipse.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeGitHub.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeNotepadXX.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemePurple.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeVS2019.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/style/SelectionHandleStyle.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleDrop.java
 create mode 100644 editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleSideDrop.java
 create mode 100644 editor/src/main/res/drawable/ic_more_vert_black_20dp.xml
 create mode 100644 editor/src/main/res/drawable/ic_sora_handle_drop.xml
 create mode 100644 editor/src/main/res/drawable/magnifier_background.xml
 create mode 100644 editor/src/main/res/drawable/round_content_copy_20.xml
 create mode 100644 editor/src/main/res/drawable/round_content_cut_20.xml
 create mode 100644 editor/src/main/res/drawable/round_content_paste_20.xml
 create mode 100644 editor/src/main/res/drawable/round_save_20.xml
 create mode 100644 editor/src/main/res/drawable/round_select_all_20.xml
 create mode 100644 editor/src/main/res/layout/default_completion_result_item.xml
 create mode 100644 editor/src/main/res/layout/magnifier_popup.xml
 create mode 100644 editor/src/main/res/layout/text_compose_panel.xml
 create mode 100644 editor/src/main/res/values-zh/strings.xml
 create mode 100644 editor/src/main/res/values/attrs.xml
 create mode 100644 editor/src/main/res/values/colors.xml
 create mode 100644 editor/src/main/res/values/dimens.xml
 create mode 100644 editor/src/main/res/values/strings.xml
 create mode 100644 editor/src/main/res/values/style.xml
 rename lsp/api/src/main/java/com/itsaky/lsp/util/NoCodeAnalyzer.kt => editor/src/test/java/io/github/rosemoe/sora/ExampleUnitTest.java (65%)
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.g4
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.interp
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.java
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.tokens
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseListener.java
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseVisitor.java
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserListener.java
 create mode 100644 lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserVisitor.java
 rename lsp/api/src/main/java/com/itsaky/lsp/api/{ICodeAnalyzer.java => IDiagnosticProvider.java} (86%)
 rename lsp/api/src/main/java/com/itsaky/lsp/{models/CodeAnalysis.kt => util/NoDiagnosticProvider.kt} (72%)
 rename lsp/java/src/main/java/com/itsaky/lsp/java/providers/{JavaCodeAnalyzer.java => JavaDiagnosticProvider.java} (70%)
 delete mode 100644 lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLFileStore.java

diff --git a/.idea/misc.xml b/.idea/misc.xml
index 3ff66db25..ad92739de 100755
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,5 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="ANTLRGenerationPreferences">
+    <option name="perGrammarGenerationSettings">
+      <list>
+        <PerGrammarGenerationSettings>
+          <option name="fileName" value="$PROJECT_DIR$/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.g4" />
+          <option name="autoGen" value="true" />
+          <option name="outputDir" value="D:\Projects\AndroidStudioProjects\AndroidIDE\lexers\src\main\java" />
+          <option name="libDir" value="" />
+          <option name="encoding" value="" />
+          <option name="pkg" value="" />
+          <option name="language" value="Java" />
+          <option name="generateVisitor" value="true" />
+        </PerGrammarGenerationSettings>
+      </list>
+    </option>
+  </component>
   <component name="DesignSurface">
     <option name="filePathToZoomLevelMap">
       <map>
@@ -24,6 +40,7 @@
         <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/fragment_editor.xml" value="0.20512820512820512" />
         <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/fragment_non_editable_editor.xml" value="0.20512820512820512" />
         <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/layout_about_items.xml" value="0.20512820512820512" />
+        <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/layout_code_editor.xml" value="0.20185185185185187" />
         <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/layout_completion_item.xml" value="0.23854166666666668" />
         <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/layout_crash_report.xml" value="0.25" />
         <entry key="..\:/Projects/AndroidStudioProjects/AndroidIDE/app/src/main/res/layout/layout_diagnostic_info.xml" value="0.20512820512820512" />
diff --git a/app/build.gradle b/app/build.gradle
index ef1657c8b..c988eae9e 100755
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -113,6 +113,7 @@ dependencies {
 	implementation 'com.google.firebase:firebase-messaging'
     
 	// Local projects here
+    implementation project(':editor')
 	implementation project(':treeview')
     implementation project(':emulatorview')
     implementation project(':xml-inflater')
diff --git a/app/src/main/assets/data/common/gradle-plugin.zip b/app/src/main/assets/data/common/gradle-plugin.zip
index 2f8df702304fa3668dba37ba0577e1d506f10194..b6eb1fc1dcc0a035bdab1b1e52e6f1d59c0149d4 100644
GIT binary patch
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delta 1777
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diff --git a/app/src/main/java/com/itsaky/androidide/EditorActivity.java b/app/src/main/java/com/itsaky/androidide/EditorActivity.java
index c2cdfe563..fbe90a54f 100755
--- a/app/src/main/java/com/itsaky/androidide/EditorActivity.java
+++ b/app/src/main/java/com/itsaky/androidide/EditorActivity.java
@@ -107,7 +107,8 @@ import com.itsaky.androidide.utils.Logger;
 import com.itsaky.androidide.utils.RecursiveFileSearcher;
 import com.itsaky.androidide.utils.Symbols;
 import com.itsaky.androidide.viewmodel.EditorViewModel;
-import com.itsaky.androidide.views.CodeEditorView;
+import com.itsaky.androidide.views.editor.CodeEditorView;
+import com.itsaky.androidide.views.editor.IDEEditor;
 import com.itsaky.androidide.views.MaterialBanner;
 import com.itsaky.androidide.views.SymbolInputView;
 import com.itsaky.inflater.ILayoutInflater;
@@ -135,7 +136,6 @@ import java.util.concurrent.CompletionException;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
-import io.github.rosemoe.editor.widget.CodeEditor;
 import me.piruin.quickaction.ActionItem;
 import me.piruin.quickaction.QuickAction;
 
@@ -228,7 +228,6 @@ public class EditorActivity extends StudioActivity implements FileTreeFragment.F
         KeyboardUtils.registerSoftInputChangedListener (this, __ -> onSoftInputChanged ());
         registerLogReceiver ();
         setupContainers ();
-        setupSignatureText ();
         setupDiagnosticInfo ();
         
         mUIDesignerLauncher = registerForActivityResult (new ActivityResultContracts.StartActivityForResult (), this::onGetUIDesignerResult);
@@ -671,7 +670,7 @@ public class EditorActivity extends StudioActivity implements FileTreeFragment.F
         openFile (file, range);
         final var opened = getEditorForFile (file);
         if (opened != null && opened.getEditor () != null) {
-            CodeEditor editor = opened.getEditor ();
+            IDEEditor editor = opened.getEditor ();
             editor.post (() -> {
                 if (LSPUtils.isEqual (range.getStart (), range.getEnd ())) {
                     editor.setSelection (range.getStart ().getLine (), range.getEnd ().getColumn ());
@@ -1288,16 +1287,6 @@ public class EditorActivity extends StudioActivity implements FileTreeFragment.F
         return mViewModel.getIDEProject ();
     }
     
-    private void setupSignatureText () {
-        GradientDrawable gd = new GradientDrawable ();
-        gd.setShape (GradientDrawable.RECTANGLE);
-        gd.setColor (0xff212121);
-        gd.setStroke (1, 0xffffffff);
-        gd.setCornerRadius (8);
-        mBinding.symbolText.setBackground (gd);
-        mBinding.symbolText.setVisibility (View.GONE);
-    }
-    
     private void setupDiagnosticInfo () {
         GradientDrawable gd = new GradientDrawable ();
         gd.setShape (GradientDrawable.RECTANGLE);
diff --git a/app/src/main/java/com/itsaky/androidide/MainActivity.java b/app/src/main/java/com/itsaky/androidide/MainActivity.java
index 6189b62c7..58b3ac648 100755
--- a/app/src/main/java/com/itsaky/androidide/MainActivity.java
+++ b/app/src/main/java/com/itsaky/androidide/MainActivity.java
@@ -190,7 +190,7 @@ public class MainActivity extends StudioActivity implements View.OnClickListener
         if (mProgressSheet == null) {
             createProgressSheet ();
         }
-    
+        
         if (mProgressSheet.isShowing ()) {
             mProgressSheet.dismiss ();
         }
@@ -204,7 +204,7 @@ public class MainActivity extends StudioActivity implements View.OnClickListener
         if (mProgressSheet == null) {
             createProgressSheet ();
         }
-    
+        
         if (mProgressSheet.isShowing ()) {
             mProgressSheet.dismiss ();
         }
@@ -267,10 +267,10 @@ public class MainActivity extends StudioActivity implements View.OnClickListener
         
         ProjectTemplate
                 empty = new ProjectTemplate ()
-                .setId (0)
-                .setName (this, R.string.template_empty)
-                .setDescription (this, R.string.template_description_empty)
-                .setImageId (R.drawable.template_empty),
+                        .setId (0)
+                        .setName (this, R.string.template_empty)
+                        .setDescription (this, R.string.template_description_empty)
+                        .setImageId (R.drawable.template_empty),
                 basic = new ProjectTemplate ()
                         .setId (1)
                         .setName (this, R.string.template_basic)
diff --git a/app/src/main/java/com/itsaky/androidide/adapters/CompletionListAdapter.java b/app/src/main/java/com/itsaky/androidide/adapters/CompletionListAdapter.java
index 77aad2dbc..653f5f4b3 100755
--- a/app/src/main/java/com/itsaky/androidide/adapters/CompletionListAdapter.java
+++ b/app/src/main/java/com/itsaky/androidide/adapters/CompletionListAdapter.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *  
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -16,7 +14,7 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
-**************************************************************************************/
+ */
 package com.itsaky.androidide.adapters;
 
 import android.content.res.Resources;
@@ -47,7 +45,7 @@ import com.itsaky.apiinfo.models.MethodInfo;
 import com.itsaky.lsp.models.CompletionItem;
 import com.itsaky.lsp.models.CompletionItemKind;
 
-import io.github.rosemoe.editor.widget.EditorCompletionAdapter;
+import io.github.rosemoe.sora.widget.component.EditorCompletionAdapter;
 
 public class CompletionListAdapter extends EditorCompletionAdapter {
     
@@ -61,10 +59,10 @@ public class CompletionListAdapter extends EditorCompletionAdapter {
     @Override
     protected View getView(int position, View convertView, ViewGroup parent, boolean isCurrentCursorPosition) {
         final LayoutCompletionItemBinding binding = LayoutCompletionItemBinding.inflate(LayoutInflater.from(getContext()), parent, false);
-
-		var item = getItem(position);
+        
+		var item = (CompletionItem) getItem(position);
 		String label = item.getLabel(), desc = item.getDetail(), type = item.getKind().toString();
-		String header = type.length() <= 0 ? "O" : String.valueOf(type.toString().charAt(0));
+		String header = type.length() <= 0 ? "O" : String.valueOf(type.charAt(0));
 		
         binding.completionIconText.setText(header);
         binding.completionLabel.setText(label);
diff --git a/app/src/main/java/com/itsaky/androidide/adapters/SymbolInputAdapter.java b/app/src/main/java/com/itsaky/androidide/adapters/SymbolInputAdapter.java
index 486ec343c..917864e17 100755
--- a/app/src/main/java/com/itsaky/androidide/adapters/SymbolInputAdapter.java
+++ b/app/src/main/java/com/itsaky/androidide/adapters/SymbolInputAdapter.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *  
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -16,58 +14,58 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
-**************************************************************************************/
-
-
+ */
 package com.itsaky.androidide.adapters;
 
 import android.annotation.SuppressLint;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
+
 import com.itsaky.androidide.databinding.LayoutSymbolItemBinding;
+import com.itsaky.androidide.views.editor.IDEEditor;
 import com.itsaky.androidide.views.SymbolInputView.Symbol;
-import io.github.rosemoe.editor.widget.CodeEditor;
-import io.github.rosemoe.editor.widget.SymbolChannel;
+
+import java.util.ArrayList;
+import java.util.List;
+
 
 public class SymbolInputAdapter extends RecyclerView.Adapter<SymbolInputAdapter.VH> {
 	
-	private SymbolChannel channel;
+	private final IDEEditor editor;
 	private Symbol[] symbols;
 	
-	public SymbolInputAdapter(CodeEditor editor) {
+	public SymbolInputAdapter(IDEEditor editor) {
 		this(editor, null);
 	}
 
-	public SymbolInputAdapter(CodeEditor editor, Symbol[] symbols) {
-		this.channel = editor.createNewSymbolChannel();
+	public SymbolInputAdapter(IDEEditor editor, Symbol[] symbols) {
+		this.editor = editor;
 		this.symbols = symbols == null ? new Symbol[0] : symbols;
 	}
 	
-	public SymbolInputAdapter setSymbols(Symbol... symbols) {
-		return setSymbols(false, symbols);
-	}
-	
-    @SuppressLint("NotifyDataSetChanged")
-	public SymbolInputAdapter setSymbols(boolean notify, Symbol... symbols) {
+	@SuppressLint("NotifyDataSetChanged")
+	public void setSymbols(boolean notify, Symbol... symbols) {
 		this.symbols = symbols;
 		if(notify) {
 			notifyDataSetChanged();
 		}
-		return this;
+	}
+	
+	@NonNull
+	@Override
+	public VH onCreateViewHolder(@NonNull ViewGroup parent, int itemType) {
+		return new VH (LayoutSymbolItemBinding.inflate (LayoutInflater.from (parent.getContext ()), parent, false));
 	}
 	
 	@Override
-	public VH onCreateViewHolder(ViewGroup parent, int itemType) {
-		return new VH(LayoutSymbolItemBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false));
-	}
-	
-	@Override
-	public void onBindViewHolder(VH holder, int position) {
+	public void onBindViewHolder(@NonNull VH holder, int position) {
 		if(symbols == null || symbols[position] == null) return;
 		final Symbol symbol = symbols[position];
 		holder.binding.symbol.setText(symbol.label);
-        holder.binding.symbol.setOnClickListener(__ -> channel.insertSymbol(symbol.commit, symbol.offset));
+        holder.binding.symbol.setOnClickListener(__ -> insertSymbol(symbol.commit, symbol.offset));
 	}
 	
 	@Override
@@ -75,7 +73,7 @@ public class SymbolInputAdapter extends RecyclerView.Adapter<SymbolInputAdapter.
 		return symbols == null ? 0 : symbols.length;
 	}
 	
-	public class VH extends RecyclerView.ViewHolder {
+	public static class VH extends RecyclerView.ViewHolder {
 		LayoutSymbolItemBinding binding;
 		
 		public VH(LayoutSymbolItemBinding binding) {
@@ -83,4 +81,42 @@ public class SymbolInputAdapter extends RecyclerView.Adapter<SymbolInputAdapter.
 			this.binding = binding;
 		}
 	}
+	
+	void insertSymbol(String text, int selectionOffset) {
+		if (selectionOffset < 0 || selectionOffset > text.length()) {
+			return;
+		}
+		var cur = editor.getText().getCursor();
+		if (cur.isSelected()) {
+			editor.getText ().delete (cur.getLeftLine (),
+					cur.getLeftColumn (),
+					cur.getRightLine (),
+					cur.getRightColumn ()
+			);
+			editor.notifyIMEExternalCursorChange ();
+		}
+		
+		if(cur.getLeftColumn() < editor.getText().getColumnCount(cur.getLeftLine())
+				&& text.length() == 1
+				&& text.charAt(0) == editor.getText().charAt(cur.getLeftLine(), cur.getLeftColumn())
+				&& pairs.contains(text.charAt(0))) {
+			editor.moveSelectionRight();
+		} else {
+			editor.commitText(text);
+			if (selectionOffset != text.length()) {
+				editor.setSelection(cur.getRightLine(), cur.getRightColumn() - (text.length() - selectionOffset));
+			}
+		}
+	}
+	
+	private static final List<Character> pairs;
+	static {
+		pairs = new ArrayList<>();
+		pairs.add('}');
+		pairs.add(')');
+		pairs.add(']');
+		pairs.add('"');
+		pairs.add('\'');
+		pairs.add('>');
+	}
 }
diff --git a/app/src/main/java/com/itsaky/androidide/fragments/FileTreeFragment.java b/app/src/main/java/com/itsaky/androidide/fragments/FileTreeFragment.java
index 43791e580..cd8d4eb09 100755
--- a/app/src/main/java/com/itsaky/androidide/fragments/FileTreeFragment.java
+++ b/app/src/main/java/com/itsaky/androidide/fragments/FileTreeFragment.java
@@ -36,13 +36,12 @@ import com.blankj.utilcode.util.FileIOUtils;
 import com.google.android.material.bottomsheet.BottomSheetDialogFragment;
 import com.itsaky.androidide.R;
 import com.itsaky.androidide.adapters.viewholders.FileTreeViewHolder;
-import com.itsaky.androidide.app.StudioApp;
 import com.itsaky.androidide.databinding.LayoutEditorFileTreeBinding;
 import com.itsaky.androidide.project.AndroidProject;
 import com.itsaky.androidide.tasks.TaskExecutor;
 import com.itsaky.androidide.tasks.callables.FileTreeCallable;
 import com.itsaky.androidide.utils.Environment;
-import com.itsaky.androidide.views.CodeEditorView;
+import com.itsaky.androidide.views.editor.CodeEditorView;
 import com.unnamed.b.atv.model.TreeNode;
 import com.unnamed.b.atv.view.AndroidTreeView;
 import java.io.File;
diff --git a/app/src/main/java/com/itsaky/androidide/fragments/LogViewFragment.java b/app/src/main/java/com/itsaky/androidide/fragments/LogViewFragment.java
index eb9eaf4cb..7df44d1e9 100644
--- a/app/src/main/java/com/itsaky/androidide/fragments/LogViewFragment.java
+++ b/app/src/main/java/com/itsaky/androidide/fragments/LogViewFragment.java
@@ -31,22 +31,22 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
+import io.github.rosemoe.sora.lang.Language;
 
 public class LogViewFragment extends NonEditableEditorFragment {
     
-    private final EditorLanguage language = getLanguage ();
+    private final Language language = getLanguage ();
     private final List<LogLine> unsavedLines = new ArrayList<> ();
     
     @Override
     public void onViewCreated (@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated (view, savedInstanceState);
-        Objects.requireNonNull (getEditor ()).setEditorLanguage (language, null);
+        Objects.requireNonNull (getEditor ()).setEditorLanguage (language);
         
         if (!unsavedLines.isEmpty ()) {
             for (var line : unsavedLines) {
                 applyToLanguage (line);
-                getEditor ().getText ().append (line.toString ().trim () + "\n");
+                getEditor ().append (line.toString ().trim () + "\n");
             }
             unsavedLines.clear ();
         }
@@ -62,7 +62,7 @@ public class LogViewFragment extends NonEditableEditorFragment {
     
         final var lineString = line.toString ();
         final var msg = lineString.endsWith ("\n") ? lineString : lineString + "\n";
-        ThreadUtils.runOnUiThread (() -> getEditor ().getText ().append (msg));
+        ThreadUtils.runOnUiThread (() -> getEditor ().append (msg));
     }
     
     private void applyToLanguage (LogLine line) {
@@ -71,7 +71,7 @@ public class LogViewFragment extends NonEditableEditorFragment {
         }
     }
     
-    protected EditorLanguage getLanguage () {
+    protected Language getLanguage () {
         return new LogLanguageImpl ();
     }
 }
diff --git a/app/src/main/java/com/itsaky/androidide/fragments/NonEditableEditorFragment.java b/app/src/main/java/com/itsaky/androidide/fragments/NonEditableEditorFragment.java
index 8891c25d7..0662ed653 100644
--- a/app/src/main/java/com/itsaky/androidide/fragments/NonEditableEditorFragment.java
+++ b/app/src/main/java/com/itsaky/androidide/fragments/NonEditableEditorFragment.java
@@ -29,9 +29,9 @@ import androidx.fragment.app.Fragment;
 import com.itsaky.androidide.databinding.FragmentNonEditableEditorBinding;
 import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
 import com.itsaky.androidide.utils.TypefaceUtils;
+import com.itsaky.androidide.views.editor.IDEEditor;
 
-import io.github.rosemoe.editor.langs.EmptyLanguage;
-import io.github.rosemoe.editor.widget.CodeEditor;
+import io.github.rosemoe.sora.lang.EmptyLanguage;
 
 public abstract class NonEditableEditorFragment extends Fragment {
     
@@ -51,9 +51,7 @@ public abstract class NonEditableEditorFragment extends Fragment {
         final var editor = binding.getRoot ();
         editor.setEditable (false);
         editor.setDividerWidth (0);
-        editor.setEditorLanguage (new EmptyLanguage (), null);
-        editor.setOverScrollEnabled (false);
-        editor.setTextActionMode (CodeEditor.TextActionMode.ACTION_MODE);
+        editor.setEditorLanguage (new EmptyLanguage ());
         editor.setWordwrap (false);
         editor.setUndoEnabled (false);
         editor.setTypefaceLineNumber (TypefaceUtils.jetbrainsMono ());
@@ -63,7 +61,7 @@ public abstract class NonEditableEditorFragment extends Fragment {
     }
     
     @Nullable
-    public CodeEditor getEditor () {
+    public IDEEditor getEditor () {
         if (binding == null) {
             return null;
         }
diff --git a/app/src/main/java/com/itsaky/androidide/fragments/SimpleOutputFragment.java b/app/src/main/java/com/itsaky/androidide/fragments/SimpleOutputFragment.java
index 3bd91220a..a5a5d46d9 100644
--- a/app/src/main/java/com/itsaky/androidide/fragments/SimpleOutputFragment.java
+++ b/app/src/main/java/com/itsaky/androidide/fragments/SimpleOutputFragment.java
@@ -39,7 +39,7 @@ public class SimpleOutputFragment extends NonEditableEditorFragment {
         
         if (!unsavedLines.isEmpty ()) {
             for (String line : unsavedLines) {
-                Objects.requireNonNull (getEditor ()).getText ().append (line.trim () + "\n");
+                Objects.requireNonNull (getEditor ()).append (line.trim () + "\n");
             }
             unsavedLines.clear ();
         }
@@ -52,7 +52,7 @@ public class SimpleOutputFragment extends NonEditableEditorFragment {
         }
         ThreadUtils.runOnUiThread (() -> {
             final var message = output == null || output.endsWith ("\n") ? output : output + "\n";
-            getEditor ().getText ().append (message);
+            getEditor ().append (message);
         });
     }
 }
diff --git a/app/src/main/java/com/itsaky/androidide/fragments/sheets/TextSheetFragment.java b/app/src/main/java/com/itsaky/androidide/fragments/sheets/TextSheetFragment.java
index ac314b61d..6ff92676e 100755
--- a/app/src/main/java/com/itsaky/androidide/fragments/sheets/TextSheetFragment.java
+++ b/app/src/main/java/com/itsaky/androidide/fragments/sheets/TextSheetFragment.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *  
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -15,28 +13,28 @@
  * 
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
- *
-**************************************************************************************/
-
-
+ */
 package com.itsaky.androidide.fragments.sheets;
 
 import android.graphics.Color;
 import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
 import android.text.style.ForegroundColorSpan;
-import android.view.View;
 import android.view.ViewGroup;
 import android.widget.LinearLayout;
+
+import androidx.annotation.NonNull;
+
 import com.itsaky.androidide.R;
 import com.itsaky.androidide.utils.TypefaceUtils;
-import io.github.rosemoe.editor.langs.EmptyLanguage;
-import io.github.rosemoe.editor.widget.CodeEditor;
+import com.itsaky.androidide.views.editor.IDEEditor;
+
+import io.github.rosemoe.sora.lang.EmptyLanguage;
 
 public class TextSheetFragment extends BaseBottomSheetFragment {
-
+    
     private SpannableStringBuilder outputBuilder;
-    private CodeEditor editor;
+    private IDEEditor editor;
     private boolean textSelectable;
 
     public TextSheetFragment setTextSelectable(boolean textSelectable) {
@@ -45,8 +43,8 @@ public class TextSheetFragment extends BaseBottomSheetFragment {
     }
 
     @Override
-    protected void bind(LinearLayout container) {
-        final CodeEditor e = getEditor();
+    protected void bind(@NonNull LinearLayout container) {
+        final IDEEditor e = getEditor();
         container.setPadding(0, 0, 0, 0);
         container.setPaddingRelative(0, 0, 0, 0);
         LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(-1, 0);
@@ -67,13 +65,10 @@ public class TextSheetFragment extends BaseBottomSheetFragment {
         super.onShow();
         editor.setText(getOutputBuilder());
     }
-
-    private Void scrollToBottom() {
+    
+    private void scrollToBottom() {
         if(getActivity() != null)
-        getActivity().runOnUiThread(() -> {
-            editor.goToEnd();
-        });
-        return null;
+        getActivity().runOnUiThread(() -> editor.goToEnd());
     }
 
     public TextSheetFragment setTitleText(int res) {
@@ -108,22 +103,20 @@ public class TextSheetFragment extends BaseBottomSheetFragment {
     private void setToEditor(SpannableString line) {
         if(getActivity() != null) 
         getActivity().runOnUiThread(() -> {
-            editor.getText().append(line);
+            editor.append(line);
             scrollToBottom();
         });
     }
 
-    private CodeEditor getEditor() {
+    private IDEEditor getEditor() {
         return editor == null ? createEditor() : editor;
     }
 
-    private CodeEditor createEditor() {
-        editor = new CodeEditor(getContext());
+    private IDEEditor createEditor() {
+        editor = new IDEEditor (getContext());
         editor.setEditable(false);
         editor.setDividerWidth(0);
-        editor.setEditorLanguage(new EmptyLanguage(), null);
-        editor.setOverScrollEnabled(false);
-        editor.setTextActionMode(CodeEditor.TextActionMode.ACTION_MODE);
+        editor.setEditorLanguage(new EmptyLanguage ());
         editor.setWordwrap(false);
         editor.setUndoEnabled(false);
         editor.setTypefaceLineNumber(TypefaceUtils.jetbrainsMono());
diff --git a/app/src/main/java/com/itsaky/androidide/language/BaseLanguage.java b/app/src/main/java/com/itsaky/androidide/language/BaseLanguage.java
index 55e254918..64ffeb6fd 100755
--- a/app/src/main/java/com/itsaky/androidide/language/BaseLanguage.java
+++ b/app/src/main/java/com/itsaky/androidide/language/BaseLanguage.java
@@ -21,9 +21,9 @@ package com.itsaky.androidide.language;
 
 import com.itsaky.androidide.app.StudioApp;
 
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
+import io.github.rosemoe.sora.lang.Language;
 
-public abstract class BaseLanguage implements EditorLanguage {
+public abstract class BaseLanguage implements Language {
     
     @Override
     public boolean useTab() {
diff --git a/app/src/main/java/com/itsaky/androidide/language/CommonCompletionProvider.java b/app/src/main/java/com/itsaky/androidide/language/CommonCompletionProvider.java
index bbd9bb0ad..e087b8737 100644
--- a/app/src/main/java/com/itsaky/androidide/language/CommonCompletionProvider.java
+++ b/app/src/main/java/com/itsaky/androidide/language/CommonCompletionProvider.java
@@ -29,17 +29,18 @@ import com.itsaky.lsp.models.Position;
 
 import org.jetbrains.annotations.Contract;
 
-import java.net.URI;
-import java.nio.file.Paths;
+import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.CompletableFuture;
 
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
+import io.github.rosemoe.sora.lang.completion.CompletionHelper;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.util.MyCharacter;
 
 /**
  * Common implementation of completion provider which requests completions
@@ -47,7 +48,7 @@ import io.github.rosemoe.editor.text.TextAnalyzeResult;
  *
  * @author Akash Yadav
  */
-public class CommonCompletionProvider implements AutoCompleteProvider {
+public class CommonCompletionProvider {
     
     private CompletableFuture<CompletionResult> future;
     
@@ -57,8 +58,7 @@ public class CommonCompletionProvider implements AutoCompleteProvider {
         this.server = server;
     }
     
-    @Override
-    public List<CompletionItem> getAutoCompleteItems(Content content, String fileUri, String prefix, boolean isInCodeBlock, TextAnalyzeResult colors, int index, int line, int column) throws Exception {
+    public List<CompletionItem> complete(ContentReference content, Path file, CharPosition position) {
         if (this.future != null && !this.future.isDone ()) {
             try {
                 this.future.cancel (true);
@@ -68,20 +68,29 @@ public class CommonCompletionProvider implements AutoCompleteProvider {
         }
         
         this.future = CompletableFuture.supplyAsync (() -> {
+            final var prefix = CompletionHelper.computePrefix (content, position, this::checkCompletionChar);
             final var completer = server.getCompletionProvider ();
-            final var path = Paths.get (URI.create (fileUri));
             
-            if (!completer.canComplete (path)) {
+            if (!completer.canComplete (file)) {
                 return ICompletionProvider.EMPTY;
             }
             
-            final var params = new CompletionParams (new Position (line, column, index), path);
+            final var params = new CompletionParams (new Position (position.line, position.column, position.index), file);
             params.setContent (content);
             params.setPrefix (prefix);
             return completer.complete (params);
         });
-        
-        return finalizeResults (future.get ().getItems ());
+    
+        try {
+            return finalizeResults (future.get ().getItems ());
+        } catch (Throwable e) {
+            LOG.error ("Unable to compute completions", e);
+            return Collections.emptyList ();
+        }
+    }
+    
+    private boolean checkCompletionChar (char c) {
+        return MyCharacter.isJavaIdentifierPart (c) || c == '.';
     }
     
     @NonNull
diff --git a/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAnalyzer.java b/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAnalyzer.java
index 0648b4cb9..78f7e6e36 100755
--- a/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAnalyzer.java
+++ b/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAnalyzer.java
@@ -18,53 +18,71 @@
 
 package com.itsaky.androidide.language.groovy;
 
-import androidx.annotation.NonNull;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.ANNOTATION;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.LITERAL;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.OPERATOR;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.TEXT_NORMAL;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.TYPE_NAME;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forComment;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forKeyword;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forString;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.get;
 
 import com.itsaky.androidide.lexers.groovy.GroovyLexer;
-import com.itsaky.lsp.api.ILanguageServer;
+import com.itsaky.androidide.utils.CharSequenceReader;
+import com.itsaky.androidide.utils.Logger;
 
 import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.CodePointCharStream;
 import org.antlr.v4.runtime.Token;
 
-import java.io.File;
 import java.io.IOException;
-import java.io.StringReader;
 import java.util.Stack;
 
-import io.github.rosemoe.editor.struct.BlockLine;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
+import io.github.rosemoe.sora.lang.analysis.SimpleAnalyzeManager;
+import io.github.rosemoe.sora.lang.styling.CodeBlock;
+import io.github.rosemoe.sora.lang.styling.MappedSpans;
+import io.github.rosemoe.sora.lang.styling.Styles;
 
-public class GroovyAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeAnalyzer {
- 
-	@Override
-	public void analyze(ILanguageServer server, File file, @NonNull Content content, TextAnalyzeResult colors, @NonNull TextAnalyzer.AnalyzeThread.Delegate delegate) throws IOException {
-		final var stream = CharStreams.fromReader (new StringReader (content.toString ()));
-		final var lexer = new GroovyLexer (stream);
-		final var stack = new Stack<BlockLine> ();
+public class GroovyAnalyzer extends SimpleAnalyzeManager<Void> {
+    
+    private static final Logger LOG = Logger.instance ("GroovyAnalyzer");
+    
+    @Override
+    protected Styles analyze (StringBuilder text, Delegate<Void> delegate) {
+        final var styles = new Styles ();
+        final var colors = new MappedSpans.Builder ();
+        final CodePointCharStream stream;
+        try {
+            stream = CharStreams.fromReader (new CharSequenceReader (text));
+        } catch (IOException e) {
+            LOG.error ("Unable to read text to analyze", e);
+            return styles;
+        }
         
+        final var lexer = new GroovyLexer (stream);
+        final var stack = new Stack<CodeBlock> ();
+    
         Token token;
         int line, column, lastLine = 1, currSwitch = 0, maxSwitch = 0, type, previous = 0;
         boolean isFirst = true;
-        
-        while (delegate.shouldAnalyze()) {
-            token = lexer.nextToken ();
     
+        while (!delegate.isCancelled ()) {
+            token = lexer.nextToken ();
+        
             if (token == null) {
                 break;
             }
-            
+        
             line = token.getLine () - 1;
             column = token.getCharPositionInLine ();
             type = token.getType ();
-            
+        
             if (type == GroovyLexer.EOF) {
                 lastLine = line;
                 break;
             }
-    
+        
             switch(type) {
                 case GroovyLexer.WS :
                     if(isFirst) {
@@ -112,7 +130,7 @@ public class GroovyAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeA
                 case GroovyLexer.VOID:
                 case GroovyLexer.VOLATILE:
                 case GroovyLexer.WHILE:
-                    colors.addIfNeeded(line, column, EditorColorScheme.KEYWORD);
+                    colors.addIfNeeded(line, column, forKeyword ());
                     break;
                 case GroovyLexer.DECIMAL_LITERAL:
                 case GroovyLexer.HEX_LITERAL:
@@ -123,11 +141,11 @@ public class GroovyAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeA
                 case GroovyLexer.BOOL_LITERAL:
                 case GroovyLexer.CHAR_LITERAL:
                 case GroovyLexer.NULL_LITERAL:
-                    colors.addIfNeeded(line, column, EditorColorScheme.LITERAL);
+                    colors.addIfNeeded(line, column, get (LITERAL));
                     break;
                 case GroovyLexer.STRING_LITERAL :
                 case GroovyLexer.SINGLE_QUOTE_STRING :
-                    checkAndAddHexString (token, EditorColorScheme.LITERAL, colors);
+                    colors.addIfNeeded (line, column, forString ());
                     break;
                 case GroovyLexer.LPAREN :
                 case GroovyLexer.RPAREN :
@@ -173,7 +191,7 @@ public class GroovyAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeA
                 case GroovyLexer.COLONCOLON :
                 case GroovyLexer.ELLIPSIS :
                 case GroovyLexer.DOT :
-                    colors.addIfNeeded(line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded(line, column, get (OPERATOR));
                     break;
                 case GroovyLexer.BOOLEAN:
                 case GroovyLexer.BYTE :
@@ -184,62 +202,65 @@ public class GroovyAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeA
                 case GroovyLexer.INT :
                 case GroovyLexer.LONG:
                 case GroovyLexer.SHORT:
-                    colors.addIfNeeded(line, column, EditorColorScheme.TYPE_NAME);
+                    colors.addIfNeeded(line, column, get (TYPE_NAME));
                     break;
                 case GroovyLexer.COMMENT :
                 case GroovyLexer.LINE_COMMENT :
-                    colors.addIfNeeded(line, column, EditorColorScheme.COMMENT);
+                    colors.addIfNeeded(line, column, forComment ());
                     break;
                 case GroovyLexer.AT :
-                    colors.addIfNeeded(line, column, EditorColorScheme.ANNOTATION);
+                    colors.addIfNeeded(line, column, get (ANNOTATION));
                     break;
                 case GroovyLexer.IDENTIFIER :
                     if (previous == GroovyLexer.AT) {
-                        colors.addIfNeeded(line, column, EditorColorScheme.ANNOTATION);
+                        colors.addIfNeeded(line, column, get (ANNOTATION));
                         break;
                     }
-            
-                    colors.addIfNeeded(line, column, EditorColorScheme.TEXT_NORMAL);
+                
+                    colors.addIfNeeded(line, column, get (TEXT_NORMAL));
                     break;
                 case GroovyLexer.LBRACE :
-                    colors.addIfNeeded(line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded(line, column, get(OPERATOR));
                     if (stack.isEmpty()) {
                         if (currSwitch > maxSwitch)
                             maxSwitch = currSwitch;
                         currSwitch = 0;
                     }
                     currSwitch++;
-                    BlockLine block = colors.obtainNewBlock();
+                    var block = styles.obtainNewBlock ();
                     block.startLine = line;
                     block.startColumn = column;
                     stack.push(block);
                     break;
                 case GroovyLexer.RBRACE :
-                    colors.addIfNeeded(line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded(line, column, get (OPERATOR));
                     if (!stack.isEmpty()) {
-                        BlockLine block2 = stack.pop();
+                        var block2 = stack.pop();
                         block2.endLine = line;
                         block2.endColumn = column;
                         if (block2.startLine != block2.endLine)
-                            colors.addBlockLine(block2);
+                            styles.addCodeBlock (block2);
                     }
                     break;
                 default:
-                    colors.addIfNeeded(line, column, EditorColorScheme.TEXT_NORMAL);
+                    colors.addIfNeeded(line, column, get (TEXT_NORMAL));
                     break;
             }
-            
+        
             isFirst = false;
             if (type != GroovyLexer.WS) {
                 previous = type;
             }
         }
-        
+    
         if (stack.isEmpty() && currSwitch > maxSwitch) {
             maxSwitch = currSwitch;
         }
-
+    
         colors.determine(lastLine);
-        colors.setSuppressSwitch(maxSwitch + 10);
-	}
+        styles.setSuppressSwitch(maxSwitch + 10);
+        styles.spans = colors.build ();
+        
+        return styles;
+    }
 }
diff --git a/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAutoComplete.java b/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAutoComplete.java
index 683fce7d1..7655d529c 100755
--- a/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAutoComplete.java
+++ b/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyAutoComplete.java
@@ -17,50 +17,50 @@
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
 **************************************************************************************/
-
-
 package com.itsaky.androidide.language.groovy;
 
+import android.os.Bundle;
+
 import com.itsaky.lsp.models.CompletionItem;
 import com.itsaky.lsp.models.CompletionItemKind;
 import com.itsaky.lsp.models.InsertTextFormat;
 
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
+import io.github.rosemoe.sora.lang.completion.CompletionHelper;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.util.MyCharacter;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
-public class GroovyAutoComplete implements AutoCompleteProvider {
+public class GroovyAutoComplete {
 	
 	private static final List<String> ANDROIDX_ARTIFACTS = createArtifacts();
 	private static final List<String> CONFIGURATIONS = createConfigs();
 	private static final List<String> OTHERS = createOtherCompletions();
-
-    @Override
-    public List<CompletionItem> getAutoCompleteItems(Content content, String fileUri, String prefix, boolean isInCodeBlock, TextAnalyzeResult colors, int index, int line, int column) throws Exception {
-        List<CompletionItem>  result = new ArrayList<>();
-
-        for(String artifact : ANDROIDX_ARTIFACTS) {
-            if(!artifact.toLowerCase(Locale.US).startsWith(prefix.toLowerCase(Locale.US))) continue;
-            result.add(createCompletionItem(artifact, prefix, true));
-        }
-
-        for(String config : CONFIGURATIONS) {
-            if(!config.toLowerCase(Locale.US).startsWith(prefix.toLowerCase(Locale.US))) continue;
-            result.add(createCompletionItem(config, prefix, false));
-        }
-
-        for(String other : OTHERS) {
-            if(!other.toLowerCase(Locale.US).startsWith(prefix.toLowerCase(Locale.US))) continue;
-            result.add(createCompletionItem(other, prefix, false));
-        }
-
-		return result;
-    }
+	
+	public void complete (ContentReference content, CharPosition position, CompletionPublisher publisher, Bundle extraArguments) {
+		publisher.setUpdateThreshold (0);
+		final var prefix = CompletionHelper.computePrefix (content, position, MyCharacter::isJavaIdentifierPart);
+		for(String artifact : ANDROIDX_ARTIFACTS) {
+			if(!artifact.toLowerCase(Locale.ROOT).startsWith(prefix.toLowerCase(Locale.ROOT))) continue;
+			publisher.addItem (createCompletionItem(artifact));
+		}
+		
+		for(String config : CONFIGURATIONS) {
+			if(!config.toLowerCase(Locale.ROOT).startsWith(prefix.toLowerCase(Locale.ROOT))) continue;
+			publisher.addItem (createCompletionItem(config));
+		}
+		
+		for(String other : OTHERS) {
+			if(!other.toLowerCase(Locale.ROOT).startsWith(prefix.toLowerCase(Locale.ROOT))) continue;
+			publisher.addItem (createCompletionItem(other));
+		}
+	}
     
-	private CompletionItem createCompletionItem(String itemLabel, String prefix, boolean artifact) {
+	private CompletionItem createCompletionItem (String itemLabel) {
         CompletionItem item = new CompletionItem();
         item.setLabel(itemLabel);
         item.setDetail("");
@@ -72,7 +72,7 @@ public class GroovyAutoComplete implements AutoCompleteProvider {
 	}
 	
 	private static List<String> createArtifacts() {
-		List<String> artifacts = new ArrayList<String>();
+		var artifacts = new ArrayList<String>();
 		artifacts.add("androidx.arch.core:core-common");
 		artifacts.add("androidx.arch.core:core");
 		artifacts.add("androidx.arch.core:core-testing");
@@ -182,7 +182,7 @@ public class GroovyAutoComplete implements AutoCompleteProvider {
 	}
 	
 	private static List<String> createConfigs() {
-		List<String> configs = new ArrayList<String>();
+		var configs = new ArrayList<String>();
 		configs.add("androidApis");
 		configs.add("androidTestAnnotationProcessor");
 		configs.add("androidTestApi");
@@ -268,112 +268,111 @@ public class GroovyAutoComplete implements AutoCompleteProvider {
 	}
 	
 	private static List<String> createOtherCompletions() {
-		List<String> others = new ArrayList<String>();
-
+		var others = new ArrayList<String> ();
+		
 		// Common words that user may use
-		others.add("android");
-		others.add("applicationVariants");
-		others.add("compileSdkVersion");
-		others.add("buildToolsVersion");
-		others.add("defaultConfig");
-		others.add("applicationId");
-		others.add("minSdkVersion");
-		others.add("targetSdkVersion");
-		others.add("versionCode");
-		others.add("versionName");
-		others.add("multiDexEnabled");
-		others.add("vectorDrawables.useSupportLibrary");
-		others.add("compileOptions");
-		others.add("coreLibraryDesugaringEnabled");
-		others.add("sourceCompatibility");
-		others.add("targetCompatibility");
-		others.add("JavaVersion.VERSION_1_8");
-		others.add("JavaVersion.VERSION_1_7");
-
+		others.add ("android");
+		others.add ("applicationVariants");
+		others.add ("compileSdkVersion");
+		others.add ("buildToolsVersion");
+		others.add ("defaultConfig");
+		others.add ("applicationId");
+		others.add ("minSdkVersion");
+		others.add ("targetSdkVersion");
+		others.add ("versionCode");
+		others.add ("versionName");
+		others.add ("multiDexEnabled");
+		others.add ("vectorDrawables.useSupportLibrary");
+		others.add ("compileOptions");
+		others.add ("coreLibraryDesugaringEnabled");
+		others.add ("sourceCompatibility");
+		others.add ("targetCompatibility");
+		others.add ("JavaVersion.VERSION_1_8");
+		others.add ("JavaVersion.VERSION_1_7");
+		
 		// Lint options
-		others.add("lintOptions");
-		others.add("quiet");
-		others.add("abortOnError");
-		others.add("checkReleaseBuilds");
-		others.add("ignoreWarnings");
-		others.add("checkAllWarnings");
-		others.add("warningsAsErrors");
-		others.add("disable");
-		others.add("enable");
-		others.add("check");
-		others.add("noLines");
-		others.add("showAll");
-		others.add("explainIssues");
-		others.add("lintConfig");
-		others.add("textReport");
-		others.add("textOutput");
-		others.add("xmlReport");
-		others.add("xmlOutput");
-		others.add("htmlReport");
-		others.add("htmlOutput");
-		others.add("fatal");
-		others.add("error");
-		others.add("warning");
-		others.add("ignore");
-		others.add("informational");
-		others.add("baseline");
-		others.add("checkTestSources");
-		others.add("ignoreTestSources");
-		others.add("checkGeneratedSources");
-		others.add("checkDependencies");
-
+		others.add ("lintOptions");
+		others.add ("quiet");
+		others.add ("abortOnError");
+		others.add ("checkReleaseBuilds");
+		others.add ("ignoreWarnings");
+		others.add ("checkAllWarnings");
+		others.add ("warningsAsErrors");
+		others.add ("disable");
+		others.add ("enable");
+		others.add ("check");
+		others.add ("noLines");
+		others.add ("showAll");
+		others.add ("explainIssues");
+		others.add ("lintConfig");
+		others.add ("textReport");
+		others.add ("textOutput");
+		others.add ("xmlReport");
+		others.add ("xmlOutput");
+		others.add ("htmlReport");
+		others.add ("htmlOutput");
+		others.add ("fatal");
+		others.add ("error");
+		others.add ("warning");
+		others.add ("ignore");
+		others.add ("informational");
+		others.add ("baseline");
+		others.add ("checkTestSources");
+		others.add ("ignoreTestSources");
+		others.add ("checkGeneratedSources");
+		others.add ("checkDependencies");
+		
 		// buildFeatures options
-		others.add("buildFeatures");
-		others.add("aidl");
-		others.add("buildConfig");
-		others.add("compose");
-		others.add("prefab");
-		others.add("renderScript");
-		others.add("resValues");
-		others.add("shaders");
-		others.add("viewBinding");
+		others.add ("buildFeatures");
+		others.add ("aidl");
+		others.add ("buildConfig");
+		others.add ("compose");
+		others.add ("prefab");
+		others.add ("renderScript");
+		others.add ("resValues");
+		others.add ("shaders");
+		others.add ("viewBinding");
 		
 		// Signing configs and all
-		others.add("signingConfigs");
-		others.add("debug");
-		others.add("storeFile");
-		others.add("storePassword");
-		others.add("keyAlias");
-		others.add("keyPassword");
-		others.add("release");
-		others.add("storeFile");
-		others.add("storePassword");
-		others.add("keyAlias");
-		others.add("keyPassword");
-		others.add("buildTypes");
-		others.add("debug");
-		others.add("minifyEnabled");
-		others.add("proguardFiles");
-		others.add("signingConfig");
-		others.add("stringfog.enable");
-		others.add("release");
-		others.add("minifyEnabled");
-		others.add("proguardFiles");
-		others.add("signingConfig");
-		others.add("stringfog.enable");
-		others.add("packagingOptions");
-		others.add("exclude");
+		others.add ("signingConfigs");
+		others.add ("debug");
+		others.add ("storeFile");
+		others.add ("storePassword");
+		others.add ("keyAlias");
+		others.add ("keyPassword");
+		others.add ("release");
+		others.add ("storeFile");
+		others.add ("storePassword");
+		others.add ("keyAlias");
+		others.add ("keyPassword");
+		others.add ("buildTypes");
+		others.add ("debug");
+		others.add ("minifyEnabled");
+		others.add ("proguardFiles");
+		others.add ("signingConfig");
+		others.add ("stringfog.enable");
+		others.add ("release");
+		others.add ("minifyEnabled");
+		others.add ("proguardFiles");
+		others.add ("signingConfig");
+		others.add ("stringfog.enable");
+		others.add ("packagingOptions");
+		others.add ("exclude");
 		
 		// Maybe used in root project's build.gradle
-		others.add("buildscript");
-		others.add("ext");
-		others.add("project.ext");
-		others.add("repositories");
-		others.add("maven");
-		others.add("url");
-		others.add("google()");
-		others.add("mavenLocal()");
-		others.add("mavenCentral()");
-		others.add("jcenter()");
-		others.add("classpath");
-		others.add("allprojects");
-		others.add("subprojects");
+		others.add ("buildscript");
+		others.add ("ext");
+		others.add ("project.ext");
+		others.add ("repositories");
+		others.add ("maven");
+		others.add ("url");
+		others.add ("google()");
+		others.add ("mavenLocal()");
+		others.add ("mavenCentral()");
+		others.add ("jcenter()");
+		others.add ("classpath");
+		others.add ("allprojects");
+		others.add ("subprojects");
 		return others;
 	}
-	
 }
diff --git a/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyLanguage.java b/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyLanguage.java
index e70a1201d..21e302140 100755
--- a/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyLanguage.java
+++ b/app/src/main/java/com/itsaky/androidide/language/groovy/GroovyLanguage.java
@@ -17,9 +17,13 @@
  **************************************************************************************/
 package com.itsaky.androidide.language.groovy;
 
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+
 import com.itsaky.androidide.language.BaseLanguage;
 import com.itsaky.androidide.lexers.groovy.GroovyLexer;
-import com.itsaky.androidide.utils.JavaCharacter;
+import com.itsaky.androidide.utils.CharSequenceReader;
 import com.itsaky.androidide.utils.Logger;
 
 import org.antlr.v4.runtime.CharStreams;
@@ -27,12 +31,15 @@ import org.antlr.v4.runtime.Token;
 
 import java.io.StringReader;
 
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.interfaces.CodeAnalyzer;
-import io.github.rosemoe.editor.interfaces.NewlineHandler;
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.TextUtils;
-import io.github.rosemoe.editor.widget.SymbolPairMatch;
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.completion.CompletionCancelledException;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandleResult;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.text.TextUtils;
+import io.github.rosemoe.sora.widget.SymbolPairMatch;
 
 public class GroovyLanguage extends BaseLanguage {
     
@@ -46,22 +53,6 @@ public class GroovyLanguage extends BaseLanguage {
         completer = new GroovyAutoComplete ();
     }
     
-    @Override
-    public CodeAnalyzer getAnalyzer () {
-        return analyzer;
-    }
-    
-    @Override
-    public AutoCompleteProvider getAutoCompleteProvider () {
-        return completer;
-    }
-    
-    @Override
-    public boolean isAutoCompleteChar (char ch) {
-        return JavaCharacter.isJavaIdentifierPart (ch) || ch == '.';
-    }
-    
-    @Override
     public int getIndentAdvance (String p1) {
         try {
             GroovyLexer lexer = new GroovyLexer (CharStreams.fromReader (new StringReader (p1)));
@@ -90,9 +81,49 @@ public class GroovyLanguage extends BaseLanguage {
         return new SymbolPairMatch.DefaultSymbolPairs ();
     }
     
+    @NonNull
     @Override
-    public boolean useTab () {
-        return false;
+    public AnalyzeManager getAnalyzeManager () {
+        return analyzer;
+    }
+    
+    @Override
+    public int getInterruptionLevel () {
+        return INTERRUPTION_LEVEL_STRONG;
+    }
+    
+    @Override
+    public void requireAutoComplete (
+            @NonNull ContentReference content,
+            @NonNull CharPosition position,
+            @NonNull CompletionPublisher publisher,
+            @NonNull Bundle extraArguments) throws CompletionCancelledException {
+        
+        completer.complete (content, position, publisher, extraArguments);
+    }
+    
+    @Override
+    public int getIndentAdvance (@NonNull ContentReference content, int line, int column) {
+        try {
+            GroovyLexer lexer = new GroovyLexer (CharStreams.fromReader (new CharSequenceReader (content)));
+            Token token;
+            int advance = 0;
+            while (((token = lexer.nextToken ()) != null && token.getType () != token.EOF)) {
+                switch (token.getType ()) {
+                    case GroovyLexer.LBRACE:
+                        advance++;
+                        break;
+                    case GroovyLexer.RBRACE:
+                        advance--;
+                        break;
+                }
+            }
+            advance = Math.max (0, advance);
+            return advance * getTabSize ();
+        } catch (Throwable e) {
+            LOG.error ("Failed to calculate indent advance", e);
+        }
+        return 0;
     }
     
     @Override
@@ -107,24 +138,29 @@ public class GroovyLanguage extends BaseLanguage {
         return newlineHandlers;
     }
     
+    @Override
+    public void destroy () {
+    
+    }
+    
     class BraceHandler implements NewlineHandler {
-        
+    
         @Override
-        public boolean matchesRequirement (String beforeText, String afterText, CharPosition cursor) {
+        public boolean matchesRequirement (String beforeText, String afterText) {
             beforeText = beforeText.trim ();
             afterText = afterText.trim ();
             return beforeText.endsWith ("{") && afterText.startsWith ("}");
         }
         
         @Override
-        public HandleResult handleNewline (String beforeText, String afterText, int tabSize) {
+        public NewlineHandleResult handleNewline (String beforeText, String afterText, int tabSize) {
             int count = TextUtils.countLeadingSpaceCount (beforeText, tabSize);
             int advanceBefore = getIndentAdvance (beforeText);
             int advanceAfter = getIndentAdvance (afterText);
             String text;
             StringBuilder sb = new StringBuilder ("\n").append (TextUtils.createIndent (count + advanceBefore, tabSize, useTab ())).append ('\n').append (text = TextUtils.createIndent (count + advanceAfter, tabSize, useTab ()));
             int shiftLeft = text.length () + 1;
-            return new HandleResult (sb, shiftLeft);
+            return new NewlineHandleResult (sb, shiftLeft);
         }
     }
 }
diff --git a/app/src/main/java/com/itsaky/androidide/language/java/JavaAnalyzer.java b/app/src/main/java/com/itsaky/androidide/language/java/JavaAnalyzer.java
index 4a72e28f2..81816c295 100644
--- a/app/src/main/java/com/itsaky/androidide/language/java/JavaAnalyzer.java
+++ b/app/src/main/java/com/itsaky/androidide/language/java/JavaAnalyzer.java
@@ -16,88 +16,99 @@
  */
 package com.itsaky.androidide.language.java;
 
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.ANNOTATION;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.LITERAL;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.OPERATOR;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.TEXT_NORMAL;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.TYPE_NAME;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forComment;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forKeyword;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forString;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.get;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.withoutCompletion;
+
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 
 import com.itsaky.androidide.lexers.java.JavaLexer;
-import com.itsaky.androidide.models.ConstantsBridge;
-import com.itsaky.androidide.utils.HighlightRangeHelper;
-import com.itsaky.androidide.utils.LSPUtils;
+import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
+import com.itsaky.androidide.utils.CharSequenceReader;
 import com.itsaky.androidide.utils.Logger;
+import com.itsaky.androidide.views.editor.IDEEditor;
 import com.itsaky.lsp.api.ILanguageServer;
-import com.itsaky.lsp.models.AnalyzeParams;
 import com.itsaky.lsp.models.DiagnosticItem;
 import com.itsaky.lsp.models.DiagnosticResult;
+import com.itsaky.lsp.models.DiagnosticSeverity;
 import com.itsaky.lsp.models.Position;
 import com.itsaky.lsp.models.Range;
 
 import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.CodePointCharStream;
 import org.antlr.v4.runtime.Token;
+import org.jetbrains.annotations.Contract;
 
 import java.io.File;
-import java.io.StringReader;
+import java.io.IOException;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Locale;
-import java.util.Map;
 import java.util.Stack;
 import java.util.concurrent.CompletableFuture;
-import java.util.stream.Collectors;
 
-import io.github.rosemoe.editor.langs.AbstractCodeAnalyzer;
-import io.github.rosemoe.editor.struct.BlockLine;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
+import io.github.rosemoe.sora.lang.analysis.SimpleAnalyzeManager;
+import io.github.rosemoe.sora.lang.styling.CodeBlock;
+import io.github.rosemoe.sora.lang.styling.MappedSpans;
+import io.github.rosemoe.sora.lang.styling.Span;
+import io.github.rosemoe.sora.lang.styling.Styles;
 
 /**
  * Code analyzer for the Java Language
  *
  * @author Akash Yadav
  */
-public class JavaAnalyzer extends AbstractCodeAnalyzer {
+public class JavaAnalyzer extends SimpleAnalyzeManager<Void> {
     
-    private final Map<Integer, List<Range>> stringMap = new HashMap<> ();
     private List<DiagnosticItem> diagnostics = new ArrayList<> ();
+    private final ILanguageServer languageServer;
     
-    private HighlightRangeHelper helper;
+    public JavaAnalyzer (ILanguageServer languageServer) {
+        this.languageServer = languageServer;
+    }
     
     @Override
-    public void analyze (@Nullable ILanguageServer languageServer,
-                         @Nullable File file,
-                         @NonNull Content content,
-                         @NonNull TextAnalyzeResult colors,
-                         @NonNull TextAnalyzer.AnalyzeThread.Delegate delegate
-    ) throws Exception {
-        
-        if (languageServer != null && file != null) {
-            CompletableFuture.runAsync (() -> {
-                final var analyzer = languageServer.getCodeAnalyzer ();
-                final var result = analyzer.analyze (new AnalyzeParams (file.toPath ()));
-                
-                JavaAnalyzer.this.diagnostics = result.getDiagnostics ();
-                JavaAnalyzer.this.helper = new HighlightRangeHelper (result.getSemanticHighlights ());
-                
-                if (languageServer.getClient () != null) {
-                    languageServer.getClient ().publishDiagnostics (new DiagnosticResult (file.toPath (), JavaAnalyzer.this.diagnostics));
-                }
-            });
+    protected Styles analyze (StringBuilder text, Delegate<Void> delegate) {
+        final var args = getExtraArguments ();
+        if (args.containsKey (IDEEditor.KEY_FILE)) {
+            final var file = new File (args.getString (IDEEditor.KEY_FILE));
+            if (languageServer != null && file.exists()) {
+                CompletableFuture.runAsync (() -> {
+                    final var analyzer = languageServer.getCodeAnalyzer ();
+                    
+                    diagnostics = analyzer.analyze (file.toPath ());
+                    
+                    if (languageServer.getClient () != null) {
+                        languageServer.getClient ().publishDiagnostics (new DiagnosticResult (file.toPath (), diagnostics));
+                    }
+                });
+            }
+    
         }
         
-        final var stream = CharStreams.fromReader (new StringReader (content.toString ()));
+        final CodePointCharStream stream;
+        final var styles = new Styles ();
+        final var colors = new MappedSpans.Builder ();
+        try {
+            stream = CharStreams.fromReader (new CharSequenceReader (text));
+        } catch (IOException e) {
+            LOG.error ("Unable to create char stream for text", e);
+            return styles;
+        }
         final var lexer = new JavaLexer (stream);
-        final var stack = new Stack<BlockLine> ();
+        final var stack = new Stack<CodeBlock> ();
     
         Token token;
-        int line, column, lastLine = 1, type, currSwitch = 0, maxSwitch = 0;
+        int line, column, lastLine = 1, type, currSwitch = 0, maxSwitch = 0, previous = -1;
         boolean isFirst = true;
     
-        this.stringMap.clear ();
-    
-        while (delegate.shouldAnalyze ()) {
+        while (!delegate.isCancelled ()) {
             token = lexer.nextToken ();
         
             if (token == null) {
@@ -112,7 +123,8 @@ public class JavaAnalyzer extends AbstractCodeAnalyzer {
                 lastLine = line;
                 break;
             }
-        
+    
+            final var tokenLength = token.getText ().length ();
             switch (type) {
                 case JavaLexer.WS:
                     if (isFirst) {
@@ -161,7 +173,7 @@ public class JavaAnalyzer extends AbstractCodeAnalyzer {
                 case JavaLexer.VOLATILE:
                 case JavaLexer.WHILE:
                 case JavaLexer.VAR:
-                    colors.addIfNeeded (line, column, EditorColorScheme.KEYWORD);
+                    colors.addIfNeeded (line, column, forKeyword ());
                     break;
                 case JavaLexer.DECIMAL_LITERAL:
                 case JavaLexer.HEX_LITERAL:
@@ -172,24 +184,11 @@ public class JavaAnalyzer extends AbstractCodeAnalyzer {
                 case JavaLexer.BOOL_LITERAL:
                 case JavaLexer.CHAR_LITERAL:
                 case JavaLexer.NULL_LITERAL:
-                    colors.addIfNeeded (line, column, EditorColorScheme.LITERAL);
+                    colors.addIfNeeded (line, column, get (LITERAL));
                     break;
                 case JavaLexer.STRING_LITERAL:
-                    checkAndAddHexString (token, EditorColorScheme.LITERAL, colors);
-                
-                    Position start = new Position (line, column);
-                    Position end = new Position (line, column + token.getText ().length ());
-                    colors.addStringRange (line, new Range (start, end));
-            
-                {
-                    List<Range> ranges = stringMap.get (line);
-                    if (ranges == null) {
-                        ranges = new ArrayList<> ();
-                    }
-                    ranges.add (new Range (start, end));
-                    stringMap.put (line, ranges);
-                }
-                break;
+                    colors.addIfNeeded (line, column, forString ());
+                    break;
                 case JavaLexer.LPAREN:
                 case JavaLexer.RPAREN:
                 case JavaLexer.LBRACK:
@@ -234,7 +233,7 @@ public class JavaAnalyzer extends AbstractCodeAnalyzer {
                 case JavaLexer.COLONCOLON:
                 case JavaLexer.ELLIPSIS:
                 case JavaLexer.DOT:
-                    colors.addIfNeeded (line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded (line, column, get (OPERATOR));
                     break;
                 case JavaLexer.BOOLEAN:
                 case JavaLexer.BYTE:
@@ -245,154 +244,58 @@ public class JavaAnalyzer extends AbstractCodeAnalyzer {
                 case JavaLexer.INT:
                 case JavaLexer.LONG:
                 case JavaLexer.SHORT:
-                    colors.addIfNeeded (line, column, EditorColorScheme.TYPE_NAME);
+                    colors.addIfNeeded (line, column, get (TYPE_NAME));
                     break;
                 case JavaLexer.BLOCK_COMMENT:
+                    colors.addIfNeeded (line, column, forComment ());
+                    break;
                 case JavaLexer.LINE_COMMENT:
-                    colors.addIfNeeded (line, column, EditorColorScheme.COMMENT);
-                
-                    final CharPosition a = content.getIndexer ().getCharPosition (token.getStopIndex ());
-                    final Position s = new Position (line, column);
-                    final Position e = new Position (a.line, a.column);
-                    colors.addCommentRange (line, new Range (s, e));
-                
-                    String lineComment = token.getText ();
-                    if (lineComment != null) {
-                        if (lineComment.startsWith ("//")) {
-                            lineComment = lineComment.substring (2);
-                        }
+                    var commentType = SchemeAndroidIDE.COMMENT;
                     
-                        // Trim leading whitespaces
-                        int startsFrom = 0;
-                        for (int i = 0; i < lineComment.length (); i++) {
-                            if (Character.isWhitespace (lineComment.charAt (i))) {
-                                startsFrom++;
-                            } else {
-                                break;
+                    // highlight special line comments
+                    var commentText = token.getText ();
+                    if (commentText.length () > 2) {
+                        commentText = commentText.substring (2);
+                        commentText = commentText.trim ();
+                        
+                        var mark = true;
+                        if ("todo".equalsIgnoreCase (commentText.substring (0, 4))) {
+                            commentType = SchemeAndroidIDE.TODO_COMMENT;
+                        } else if ("fixme".equalsIgnoreCase (commentText.substring (0, 5))) {
+                            commentType = SchemeAndroidIDE.FIXME_COMMENT;
+                        } else {
+                            mark = false;
+                        }
+                        
+                        if (mark) {
+                            if (diagnostics == null) {
+                                diagnostics = new ArrayList<> ();
                             }
-                        }
-                    
-                        lineComment = lineComment.substring (startsFrom);
-                    
-                        final String text = new String (lineComment.toCharArray ());
-                        lineComment = lineComment.toLowerCase (Locale.getDefault ());
-                        if (lineComment.startsWith ("todo ")) {
-                            diagnostics.add (LSPUtils.newInfoDiagnostic (line,
-                                    column,
-                                    token.getText ().length (),
-                                    text,
-                                    token.getText ()));
-                        } else if (lineComment.startsWith (ConstantsBridge.CUSTOM_COMMENT_WARNING_TOKEN)) {
-                            diagnostics.add (LSPUtils.newWarningDiagnostic (line,
-                                    column,
-                                    token.getText ().length (),
-                                    text,
-                                    token.getText ()));
+                            final var diagnostic = new DiagnosticItem ();
+                            diagnostic.setSeverity (DiagnosticSeverity.WARNING);
+                            diagnostic.setMessage (commentText);
+                            diagnostic.setCode ("special.comment");
+                            diagnostic.setRange (new Range (new Position (line, column), new Position (line, column + tokenLength)));
+                            diagnostic.setSource (commentText);
+                            diagnostics.add (diagnostic);
                         }
                     }
+                    
+                    colors.addIfNeeded (line, column, withoutCompletion (commentType));
                 
                     break;
                 case JavaLexer.AT:
-                    colors.addIfNeeded (line, column, EditorColorScheme.ANNOTATION);
+                    colors.addIfNeeded (line, column, get (ANNOTATION));
                     break;
                 case JavaLexer.IDENTIFIER:
-    
-                    if (helper != null) {
-                        if (helper.isPackageName (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.PACKAGE_NAME);
-                            break;
-                        }
-    
-                        if (helper.isEnumType (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.ENUM_TYPE);
-                            break;
-                        }
-    
-                        if (helper.isClassName (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.TYPE_NAME);
-                            break;
-                        }
-    
-                        if (helper.isAnnotationType (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.ANNOTATION);
-                            break;
-                        }
-    
-                        if (helper.isInterface (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.INTERFACE);
-                            break;
-                        }
-    
-                        if (helper.isEnum (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.ENUM);
-                            break;
-                        }
-    
-                        if (helper.isStaticField (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.STATIC_FIELD);
-                            break;
-                        }
-    
-                        if (helper.isField (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.FIELD);
-                            break;
-                        }
-    
-                        if (helper.isParameter (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.PARAMETER);
-                            break;
-                        }
-    
-                        if (helper.isLocal (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.LOCAL_VARIABLE);
-                            break;
-                        }
-    
-                        if (helper.isExceptionParam (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.EXCEPTION_PARAM);
-                            break;
-                        }
-    
-                        if (helper.isMethodDeclaration (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.METHOD_DECLARATION);
-                            break;
-                        }
-    
-                        if (helper.isMethodInvocation (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.METHOD_INVOCATION);
-                            break;
-                        }
-    
-                        if (helper.isConstructor (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.CONSTRUCTOR);
-                            break;
-                        }
-    
-                        if (helper.isStaticInit (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.STATIC_INIT);
-                            break;
-                        }
-    
-                        if (helper.isInstanceInit (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.INSTANCE_INIT);
-                            break;
-                        }
-    
-                        if (helper.isTypeParam (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.TYPE_PARAM);
-                            break;
-                        }
-    
-                        if (helper.isResourceVariable (line, column)) {
-                            colors.addIfNeeded (line, column, EditorColorScheme.RESOURCE_VARIABLE);
-                            break;
-                        }
+                    int colorId = SchemeAndroidIDE.TEXT_NORMAL;
+                    if (previous == JavaLexer.AT) {
+                        colorId = SchemeAndroidIDE.ANNOTATION;
                     }
-                    
-                    colors.addIfNeeded (line, column, EditorColorScheme.TEXT_NORMAL);
+                    colors.addIfNeeded (line, column, get (colorId));
                     break;
                 case JavaLexer.LBRACE:
-                    colors.addIfNeeded (line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded (line, column, get (OPERATOR));
                     if (stack.isEmpty ()) {
                         if (currSwitch > maxSwitch) {
                             maxSwitch = currSwitch;
@@ -400,66 +303,71 @@ public class JavaAnalyzer extends AbstractCodeAnalyzer {
                         currSwitch = 0;
                     }
                     currSwitch++;
-                    BlockLine block = colors.obtainNewBlock ();
+                    var block = styles.obtainNewBlock ();
                     block.startLine = line;
                     block.startColumn = column;
                     stack.push (block);
                     break;
                 case JavaLexer.RBRACE:
-                    colors.addIfNeeded (line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded (line, column, get (OPERATOR));
                     if (!stack.isEmpty ()) {
-                        BlockLine block2 = stack.pop ();
+                        var block2 = stack.pop ();
                         block2.endLine = line;
                         block2.endColumn = column;
                         if (block2.startLine != block2.endLine) {
-                            colors.addBlockLine (block2);
+                            styles.addCodeBlock (block2);
                         }
                     }
                     break;
                 default:
-                    colors.addIfNeeded (line, column, EditorColorScheme.TEXT_NORMAL);
+                    colors.addIfNeeded (line, column, get (TEXT_NORMAL));
                     break;
             }
         
             isFirst = false;
+            
+            if (type != JavaLexer.WS) {
+                previous = type;
+            }
         }
     
         if (stack.isEmpty () && currSwitch > maxSwitch) {
             maxSwitch = currSwitch;
         }
-        
-        colors.determine (lastLine);
-        colors.setSuppressSwitch (maxSwitch + 10);
-    }
     
-    @Override
-    public DiagnosticItem findDiagnosticContaining (int line, int column) {
-        final var position = new Position (line, column);
+        colors.determine (lastLine);
+        styles.setSuppressSwitch (maxSwitch + 10);
         
-        // binary search the diagnostic item at the given position
-        // compare by search position
-        int left = 0; int right = diagnostics.size () - 1; int mid;
-        while (left < right) {
-            mid = (left + right) / 2;
-            final var diagnostic = diagnostics.get (mid);
-            final var range = diagnostic.getRange ();
-            final var res = range.containsForBinarySearch (position);
-            if (res < 0) {
-                left = mid + 1;
-            } else if (res > 0) {
-                right = mid - 1;
-            } else {
-                return diagnostic;
+        if (diagnostics != null && !diagnostics.isEmpty ()) {
+            for (var d : diagnostics) {
+                var start = d.getRange ().getStart ();
+                var end = d.getRange ().getEnd ();
+                
+                colors.markProblemRegion (convertToSpanFlag(d.getSeverity ()),
+                        start.getLine (),
+                        start.getColumn (),
+                        end.getLine (),
+                        end.getColumn ());
             }
         }
-        return super.findDiagnosticContaining (line, column);
+        
+        styles.spans = colors.build ();
+        
+        return styles;
     }
     
-    @Override
-    public List<DiagnosticItem> findDiagnosticsContainingLine (int line) {
-        return diagnostics.stream ()
-                .filter (diagnostic -> diagnostic.getRange ().containsLine (line))
-                .collect (Collectors.toList ());
+    @Contract(pure = true)
+    private int convertToSpanFlag (@NonNull DiagnosticSeverity severity) {
+        switch (severity) {
+            case WARNING:
+                return Span.FLAG_WARNING;
+            case ERROR:
+                return Span.FLAG_ERROR;
+            case HINT:
+            case INFO:
+            default:
+                return Span.FLAG_TYPO;
+        }
     }
     
     private static final Logger LOG = Logger.instance ("JavaAnalyzer");
diff --git a/app/src/main/java/com/itsaky/androidide/language/java/JavaLanguage.java b/app/src/main/java/com/itsaky/androidide/language/java/JavaLanguage.java
index f93217514..689777165 100755
--- a/app/src/main/java/com/itsaky/androidide/language/java/JavaLanguage.java
+++ b/app/src/main/java/com/itsaky/androidide/language/java/JavaLanguage.java
@@ -1,4 +1,4 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
  * AndroidIDE is free software: you can redistribute it and/or modify
@@ -14,9 +14,11 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
-**************************************************************************************/
+ */
 package com.itsaky.androidide.language.java;
 
+import android.os.Bundle;
+
 import androidx.annotation.NonNull;
 
 import com.itsaky.androidide.app.StudioApp;
@@ -24,58 +26,48 @@ import com.itsaky.androidide.language.BaseLanguage;
 import com.itsaky.androidide.language.CommonCompletionProvider;
 import com.itsaky.androidide.lexers.java.JavaLexer;
 import com.itsaky.androidide.lexers.java.JavaParser;
-import com.itsaky.androidide.utils.JavaCharacter;
 import com.itsaky.androidide.utils.Logger;
+import com.itsaky.androidide.views.editor.IDEEditor;
 
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.Token;
 
 import java.io.StringReader;
+import java.nio.file.Paths;
+import java.util.ArrayList;
 
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.interfaces.CodeAnalyzer;
-import io.github.rosemoe.editor.interfaces.NewlineHandler;
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.TextUtils;
-import io.github.rosemoe.editor.widget.SymbolPairMatch;
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.completion.CompletionCancelledException;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandleResult;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.text.TextUtils;
+import io.github.rosemoe.sora.widget.SymbolPairMatch;
 
 public class JavaLanguage extends BaseLanguage {
     
-    private final JavaAnalyzer analyzer;
-	private final AutoCompleteProvider complete;
+    private JavaAnalyzer analyzer;
+	private CommonCompletionProvider completer;
     
     private final NewlineHandler[] newlineHandlers;
     
     private static final Logger LOG = Logger.instance("JavaLanguage");
     
 	public JavaLanguage() {
-		this.analyzer = new JavaAnalyzer ();
-		this.complete = new CommonCompletionProvider (StudioApp.getInstance ().getJavaLanguageServer ());
+		final var server = StudioApp.getInstance ().getJavaLanguageServer ();
+		this.analyzer = new JavaAnalyzer (server);
+		this.completer = new CommonCompletionProvider (server);
         
         this.newlineHandlers = new NewlineHandler[1];
         this.newlineHandlers[0] = new BraceHandler();
 	}
-
-	@Override
-	public CodeAnalyzer getAnalyzer() {
-		return analyzer;
-	}
-
-	@Override
-	public AutoCompleteProvider getAutoCompleteProvider() {
-		return complete;
-	}
-
-	@Override
-	public boolean isAutoCompleteChar(char p1) {
-		return JavaCharacter.isJavaIdentifierPart(p1) || p1 == '.';
-	}
-
-	@Override
+	
 	public int getIndentAdvance(String p1) {
 		try {
 			JavaLexer lexer = new JavaLexer(CharStreams.fromReader(new StringReader(p1)));
-			Token token = null;
+			Token token;
 			int advance = 0;
 			while (((token = lexer.nextToken()) != null && token.getType() != token.EOF)) {
 				switch (token.getType()) {
@@ -92,6 +84,7 @@ public class JavaLanguage extends BaseLanguage {
 		} catch (Throwable e) {
 			LOG.error ("Error calculating indent advance", e);
 		}
+		
 		return 0;
 	}
 
@@ -99,7 +92,33 @@ public class JavaLanguage extends BaseLanguage {
 	public SymbolPairMatch getSymbolPairs() {
 		return new JavaSymbolPairs ();
 	}
-
+	
+	@NonNull
+	@Override
+	public AnalyzeManager getAnalyzeManager () {
+		return analyzer;
+	}
+	
+	@Override
+	public int getInterruptionLevel () {
+		return 0;
+	}
+	
+	@Override
+	public void requireAutoComplete (@NonNull ContentReference content, @NonNull CharPosition position, @NonNull CompletionPublisher publisher, @NonNull Bundle extraArguments) throws CompletionCancelledException {
+		if (!extraArguments.containsKey (IDEEditor.KEY_FILE)) {
+			return;
+		}
+		final var file = Paths.get (extraArguments.getString (IDEEditor.KEY_FILE));
+		publisher.setUpdateThreshold (0);
+		publisher.addItems (new ArrayList<> (completer.complete (content, file, position)));
+	}
+	
+	@Override
+	public int getIndentAdvance (@NonNull ContentReference content, int line, int column) {
+		return getIndentAdvance (content.getLine (line).substring (0, column));
+	}
+	
 	@Override
 	public boolean useTab() {
 		return false;
@@ -114,16 +133,22 @@ public class JavaLanguage extends BaseLanguage {
     public NewlineHandler[] getNewlineHandlers() {
         return newlineHandlers;
     }
-
-    class BraceHandler implements NewlineHandler {
-
-        @Override
-        public boolean matchesRequirement(@NonNull String beforeText, String afterText, CharPosition cursor) {
-            return beforeText.endsWith("{") && afterText.startsWith("}");
-        }
-
-        @Override
-        public HandleResult handleNewline(String beforeText, String afterText, int tabSize) {
+	
+	@Override
+	public void destroy () {
+		analyzer = null;
+		completer = null;
+	}
+	
+	class BraceHandler implements NewlineHandler {
+		
+		@Override
+		public boolean matchesRequirement (String beforeText, String afterText) {
+			return beforeText.endsWith("{") && afterText.startsWith("}");
+		}
+		
+		@Override
+        public NewlineHandleResult handleNewline(String beforeText, String afterText, int tabSize) {
             int count = TextUtils.countLeadingSpaceCount(beforeText, tabSize);
             int advanceBefore = getIndentAdvance(beforeText);
             int advanceAfter = getIndentAdvance(afterText);
@@ -133,7 +158,7 @@ public class JavaLanguage extends BaseLanguage {
                 .append('\n')
                 .append(text = TextUtils.createIndent(count + advanceAfter, tabSize, useTab()));
             int shiftLeft = text.length() + 1;
-            return new HandleResult(sb, shiftLeft);
+            return new NewlineHandleResult (sb, shiftLeft);
         }
     }
     
diff --git a/app/src/main/java/com/itsaky/androidide/language/logs/LogLanguageImpl.java b/app/src/main/java/com/itsaky/androidide/language/logs/LogLanguageImpl.java
index 936bc9def..23ef852b1 100755
--- a/app/src/main/java/com/itsaky/androidide/language/logs/LogLanguageImpl.java
+++ b/app/src/main/java/com/itsaky/androidide/language/logs/LogLanguageImpl.java
@@ -17,49 +17,53 @@
  */
 package com.itsaky.androidide.language.logs;
 
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+
 import com.itsaky.androidide.language.BaseLanguage;
 import com.itsaky.androidide.models.LogLine;
-import com.itsaky.lsp.api.ILanguageServer;
-import com.itsaky.lsp.models.CompletionItem;
+import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
 
-import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.interfaces.CodeAnalyzer;
-import io.github.rosemoe.editor.interfaces.NewlineHandler;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
-import io.github.rosemoe.editor.widget.SymbolPairMatch;
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.analysis.SimpleAnalyzeManager;
+import io.github.rosemoe.sora.lang.completion.CompletionCancelledException;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.lang.styling.MappedSpans;
+import io.github.rosemoe.sora.lang.styling.Styles;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.widget.SymbolPairMatch;
 
 public class LogLanguageImpl extends BaseLanguage {
 	
 	private static final LogAnalyzer analyzer = new LogAnalyzer();
-	private static final LogCompletor completor = new LogCompletor();
 	
 	public void addLine(LogLine line) {
 		analyzer.addLine (line);
 	}
 	
+	@NonNull
 	@Override
-	public CodeAnalyzer getAnalyzer() {
+	public AnalyzeManager getAnalyzeManager () {
 		return analyzer;
 	}
 	
 	@Override
-	public AutoCompleteProvider getAutoCompleteProvider() {
-		return completor;
+	public int getInterruptionLevel () {
+		return 0;
 	}
 	
 	@Override
-	public boolean isAutoCompleteChar(char ch) {
-		return false;
+	public void requireAutoComplete (@NonNull ContentReference content, @NonNull CharPosition position, @NonNull CompletionPublisher publisher, @NonNull Bundle extraArguments) throws CompletionCancelledException {
 	}
 	
 	@Override
-	public int getIndentAdvance(String content) {
+	public int getIndentAdvance (@NonNull ContentReference content, int line, int column) {
 		return 0;
 	}
 	
@@ -83,7 +87,12 @@ public class LogLanguageImpl extends BaseLanguage {
 		return new NewlineHandler[0];
 	}
 	
-	private static class LogAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeAnalyzer {
+	@Override
+	public void destroy () {
+	
+	}
+	
+	private static class LogAnalyzer extends SimpleAnalyzeManager<Void> {
 		
 		private static final List<LogLine> lines = new ArrayList<>();
 		
@@ -95,23 +104,21 @@ public class LogLanguageImpl extends BaseLanguage {
 		}
 		
 		@Override
-		public void analyze(ILanguageServer server, File file, Content content, TextAnalyzeResult colors, TextAnalyzer.AnalyzeThread.Delegate delegate) {
+		protected Styles analyze (StringBuilder text, Delegate<Void> delegate) {
+			final var styles = new Styles ();
+			final var colors = new MappedSpans.Builder ();
 			int lastLine = 0;
-			for(int i=0;i<lines.size() && delegate.shouldAnalyze();i++) {
+			for(int i=0;i<lines.size() && !delegate.isCancelled ();i++) {
 				if(i==0) colors.addNormalIfNull();
 				LogLine line = lines.get(i);
-				colors.addIfNeeded(i, 0, line.priority);
+				colors.addIfNeeded(i, 0, SchemeAndroidIDE.get (line.priority));
 				lastLine = i;
 			}
 			colors.determine(lastLine);
-		}
-	}
-	
-	private static class LogCompletor implements AutoCompleteProvider {
-		
-		@Override
-		public List<CompletionItem> getAutoCompleteItems(Content content, String fileUri, String prefix, boolean isInCodeBlock, TextAnalyzeResult colors, int index, int line, int column) {
-			return new ArrayList<> ();
+			
+			styles.spans = colors.build ();
+			
+			return styles;
 		}
 	}
 }
diff --git a/app/src/main/java/com/itsaky/androidide/language/xml/XMLAnalyzer.java b/app/src/main/java/com/itsaky/androidide/language/xml/XMLAnalyzer.java
index b93f24edd..fab4a319b 100755
--- a/app/src/main/java/com/itsaky/androidide/language/xml/XMLAnalyzer.java
+++ b/app/src/main/java/com/itsaky/androidide/language/xml/XMLAnalyzer.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -16,42 +14,62 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
- **************************************************************************************/
-
+ */
 package com.itsaky.androidide.language.xml;
 
-import androidx.annotation.NonNull;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forComment;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.forString;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.get;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.OPERATOR;
+import static com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE.TEXT_SELECTED;
 
 import com.itsaky.androidide.lexers.xml.XMLLexer;
+import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
+import com.itsaky.androidide.utils.CharSequenceReader;
 import com.itsaky.androidide.utils.Logger;
-import com.itsaky.lsp.api.ILanguageServer;
 
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.CodePointCharStream;
 import org.antlr.v4.runtime.Token;
 
-import java.io.File;
 import java.io.IOException;
-import java.io.StringReader;
+import java.util.Stack;
 
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
+import io.github.rosemoe.sora.lang.analysis.SimpleAnalyzeManager;
+import io.github.rosemoe.sora.lang.styling.CodeBlock;
+import io.github.rosemoe.sora.lang.styling.MappedSpans;
+import io.github.rosemoe.sora.lang.styling.Styles;
 
-public class XMLAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeAnalyzer {
+/**
+ * Simple analyzer implementation for the XML files.
+ * @author Akash Yadav
+ */
+public class XMLAnalyzer extends SimpleAnalyzeManager<Void> {
     
     private static final Logger LOG = Logger.instance ("XMLAnalyzer");
     
     @Override
-    public void analyze (ILanguageServer server, File file, @NonNull Content content, TextAnalyzeResult colors, @NonNull TextAnalyzer.AnalyzeThread.Delegate delegate) throws IOException {
-        CodePointCharStream stream = CharStreams.fromReader (new StringReader (content.toString ()));
+    protected Styles analyze (StringBuilder text, Delegate<Void> delegate) {
+        final var styles = new Styles ();
+        final var colors = new MappedSpans.Builder ();
+        
+        CodePointCharStream stream;
+        try {
+            stream = CharStreams.fromReader (new CharSequenceReader (text));
+        } catch (IOException e) {
+            LOG.error ("Unable to create stream for analyze", e);
+            return styles;
+        }
+        
         XMLLexer lexer = new XMLLexer (stream);
-        Token token = null, previous = null;
-        int line = 0, column = 0, lastLine = 1;
+        Token token;
+        int previous = 0;
+        int line, column, lastLine = 1;
         var first = true;
         
-        while (delegate.shouldAnalyze ()) {
+        final var stack = new Stack<CodeBlock> ();
+        
+        while (!delegate.isCancelled ()) {
             token = lexer.nextToken ();
             if (token == null) {
                 break;
@@ -75,35 +93,62 @@ public class XMLAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeAnal
                     
                     break;
                 case XMLLexer.COMMENT:
-                    colors.addIfNeeded (line, column, EditorColorScheme.COMMENT);
+                    colors.addIfNeeded (line, column, forComment ());
                     break;
                 case XMLLexer.OPEN:
                 case XMLLexer.OPEN_SLASH:
                 case XMLLexer.CLOSE:
                 case XMLLexer.SLASH:
-                case XMLLexer.SLASH_CLOSE:
                 case XMLLexer.SPECIAL_CLOSE:
                 case XMLLexer.EQUALS:
+                case XMLLexer.COLON:
                 case XMLLexer.XMLDeclOpen:
-                    colors.addIfNeeded (line, column, EditorColorScheme.OPERATOR);
+                    colors.addIfNeeded (line, column, get (OPERATOR));
+                    break;
+                case XMLLexer.SLASH_CLOSE:
+                    colors.addIfNeeded (line, column, get (OPERATOR));
+                    final var closeBlock = stack.pop ();
+                    closeBlock.endLine = line;
+                    closeBlock.endColumn = column;
+                    styles.addCodeBlock (closeBlock);
                     break;
                 case XMLLexer.STRING:
-                    checkAndAddHexString (token, EditorColorScheme.LITERAL, colors);
+                    colors.addIfNeeded (line, column, forString ());
                     break;
                 case XMLLexer.Name:
-                    checkAndAddHexString (token, previous.getType () == XMLLexer.OPEN || previous.getType () == XMLLexer.OPEN_SLASH ? EditorColorScheme.XML_TAG : EditorColorScheme.TEXT_NORMAL, colors);
+                    var type = SchemeAndroidIDE.TEXT_NORMAL;
+                    if (previous == XMLLexer.OPEN) {
+                        type = SchemeAndroidIDE.XML_TAG;
+                        final var block = styles.obtainNewBlock ();
+                        block.startLine = line;
+                        block.startColumn = column;
+                        stack.push (block);
+                    }
+                    
+                    if (previous == XMLLexer.OPEN_SLASH) {
+                        type = SchemeAndroidIDE.XML_TAG;
+                        final var block = stack.pop ();
+                        block.endLine = line;
+                        block.endColumn = column;
+                        styles.addCodeBlock (block);
+                    }
+                    
+                    colors.addIfNeeded (line, column, get (type));
                     break;
                 case XMLLexer.TEXT:
-                    checkAndAddHexString (token, EditorColorScheme.TEXT_NORMAL, colors);
                 default:
-                    colors.addIfNeeded(line, column, EditorColorScheme.TEXT_NORMAL);
+                    colors.addIfNeeded (line, column, get (TEXT_SELECTED));
                     break;
             }
             first = false;
             if (token.getType () != XMLLexer.SEA_WS) {
-                previous = token;
+                previous = token.getType ();
             }
         }
         colors.determine (lastLine);
+        
+        styles.spans = colors.build ();
+        
+        return styles;
     }
 }
diff --git a/app/src/main/java/com/itsaky/androidide/language/xml/XMLLanguage.java b/app/src/main/java/com/itsaky/androidide/language/xml/XMLLanguage.java
index b23206530..ed47d141b 100755
--- a/app/src/main/java/com/itsaky/androidide/language/xml/XMLLanguage.java
+++ b/app/src/main/java/com/itsaky/androidide/language/xml/XMLLanguage.java
@@ -17,27 +17,37 @@
  */
 package com.itsaky.androidide.language.xml;
 
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+
 import com.itsaky.androidide.app.StudioApp;
 import com.itsaky.androidide.language.BaseLanguage;
 import com.itsaky.androidide.language.CommonCompletionProvider;
 import com.itsaky.androidide.lexers.xml.XMLLexer;
 import com.itsaky.androidide.utils.JavaCharacter;
 import com.itsaky.androidide.utils.Logger;
+import com.itsaky.androidide.views.editor.IDEEditor;
 
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.Token;
 
 import java.io.StringReader;
+import java.nio.file.Paths;
+import java.util.ArrayList;
 
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.interfaces.CodeAnalyzer;
-import io.github.rosemoe.editor.interfaces.NewlineHandler;
-import io.github.rosemoe.editor.widget.SymbolPairMatch;
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.completion.CompletionCancelledException;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.widget.SymbolPairMatch;
 
 public class XMLLanguage extends BaseLanguage {
 
-	private final XMLAnalyzer analyzer;
-	private final AutoCompleteProvider completer;
+	private XMLAnalyzer analyzer;
+	private final CommonCompletionProvider completer;
 	private final NewlineHandler[] newlineHandlers;
 	
 	private static final Logger LOG = Logger.instance ("XMLLanguage");
@@ -47,25 +57,13 @@ public class XMLLanguage extends BaseLanguage {
 		this.analyzer = new XMLAnalyzer();
 		this.newlineHandlers = new NewlineHandler[0];
 	}
-    
-	@Override
-	public CodeAnalyzer getAnalyzer() {
-		return analyzer;
-	}
-
-	@Override
-	public AutoCompleteProvider getAutoCompleteProvider() {
-		return completer;
-	}
-
-	@Override
+	
 	public boolean isAutoCompleteChar(char ch) {
 		return JavaCharacter.isJavaIdentifierPart(ch)
         || ch == '<'
         || ch == '/';
 	}
-
-	@Override
+	
 	public int getIndentAdvance(String content) {
 		try {
 			XMLLexer lexer = new XMLLexer(CharStreams.fromReader(new StringReader(content)));
@@ -99,7 +97,35 @@ public class XMLLanguage extends BaseLanguage {
 	public SymbolPairMatch getSymbolPairs() {
 		return new SymbolPairMatch.DefaultSymbolPairs();
 	}
-
+	
+	@NonNull
+	@Override
+	public AnalyzeManager getAnalyzeManager () {
+		return analyzer;
+	}
+	
+	@Override
+	public int getInterruptionLevel () {
+		return INTERRUPTION_LEVEL_STRONG;
+	}
+	
+	@Override
+	public void requireAutoComplete (@NonNull ContentReference content, @NonNull CharPosition position, @NonNull CompletionPublisher publisher, @NonNull Bundle extraArguments) throws CompletionCancelledException {
+		if (!extraArguments.containsKey (IDEEditor.KEY_FILE)) {
+			return;
+		}
+		
+		final var file = Paths.get (extraArguments.getString (IDEEditor.KEY_FILE));
+		publisher.setUpdateThreshold (0);
+		publisher.addItems (new ArrayList<> (completer.complete (content, file, position)));
+	}
+	
+	@Override
+	public int getIndentAdvance (@NonNull ContentReference content, int line, int column) {
+		final var text = content.getLine (line).substring (0, column);
+		return getIndentAdvance (text);
+	}
+	
 	@Override
 	public boolean useTab() {
 		return false;
@@ -114,4 +140,9 @@ public class XMLLanguage extends BaseLanguage {
     public NewlineHandler[] getNewlineHandlers() {
         return newlineHandlers;
     }
+	
+	@Override
+	public void destroy () {
+		analyzer = null;
+	}
 }
diff --git a/app/src/main/java/com/itsaky/androidide/lsp/IDELanguageClientImpl.java b/app/src/main/java/com/itsaky/androidide/lsp/IDELanguageClientImpl.java
index 17c84cfae..afeb40f8d 100755
--- a/app/src/main/java/com/itsaky/androidide/lsp/IDELanguageClientImpl.java
+++ b/app/src/main/java/com/itsaky/androidide/lsp/IDELanguageClientImpl.java
@@ -23,9 +23,7 @@ import android.text.SpannableStringBuilder;
 import android.text.style.ForegroundColorSpan;
 import android.view.View;
 
-import androidx.annotation.NonNull;
 import androidx.core.content.ContextCompat;
-import androidx.transition.TransitionManager;
 
 import com.blankj.utilcode.util.FileIOUtils;
 import com.blankj.utilcode.util.FileUtils;
@@ -46,14 +44,14 @@ import com.itsaky.androidide.tasks.TaskExecutor;
 import com.itsaky.androidide.utils.DialogUtils;
 import com.itsaky.androidide.utils.LSPUtils;
 import com.itsaky.androidide.utils.Logger;
-import com.itsaky.androidide.views.CodeEditorView;
+import com.itsaky.androidide.views.editor.CodeEditorView;
+import com.itsaky.androidide.views.editor.IDEEditor;
 import com.itsaky.lsp.api.ILanguageClient;
 import com.itsaky.lsp.models.CodeActionItem;
 import com.itsaky.lsp.models.DiagnosticItem;
 import com.itsaky.lsp.models.DiagnosticResult;
 import com.itsaky.lsp.models.Location;
 import com.itsaky.lsp.models.Range;
-import com.itsaky.lsp.models.SignatureInformation;
 import com.itsaky.lsp.models.TextEdit;
 import com.itsaky.toaster.Toaster;
 
@@ -65,8 +63,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.widget.CodeEditor;
+import io.github.rosemoe.sora.text.Content;
 
 /**
  * AndroidIDE specific implementation of the LanguageClient
@@ -124,7 +121,7 @@ public class IDELanguageClientImpl implements ILanguageClient {
         return activity ().getEditorForFile (file);
     }
     
-    public void showDiagnostic(DiagnosticItem diagnostic, final CodeEditor editor) {
+    public void showDiagnostic(DiagnosticItem diagnostic, final IDEEditor editor) {
         if(activity() == null || activity().getDiagnosticBinding() == null) {
             hideDiagnostics();
             return;
@@ -140,7 +137,7 @@ public class IDELanguageClientImpl implements ILanguageClient {
         binding.getRoot().setVisibility(View.VISIBLE);
         
         final float[] cursor = editor.getCursorPosition();
-
+        
         float x = editor.updateCursorAnchor() - (binding.getRoot().getWidth() / 2);
         float y = activity().getBinding().editorAppBarLayout.getHeight() + (cursor[0] - editor.getRowHeight() - editor.getOffsetY() - binding.getRoot().getHeight());
         binding.getRoot().setX(x);
@@ -153,9 +150,9 @@ public class IDELanguageClientImpl implements ILanguageClient {
      * and requests code actions from language server
      *
      * @param diagnostic The diagnostic to show
-     * @param editor The CodeEditor that requested
+     * @param editor The IDEEditor that requested
      */
-    public void showDiagnosticAtBottom(final File file, final DiagnosticItem diagnostic, final CodeEditor editor) {
+    public void showDiagnosticAtBottom(final File file, final DiagnosticItem diagnostic, final IDEEditor editor) {
         if(activity() == null || file == null || diagnostic == null) {
             hideBottomDiagnosticView(file);
             return;
@@ -225,88 +222,6 @@ public class IDELanguageClientImpl implements ILanguageClient {
         frag.getBinding().diagnosticText.setClickable(false);
     }
     
-    public void showSignatureHelp (com.itsaky.lsp.models.SignatureHelp signature, File file) {
-        if(signature == null) {
-            hideSignatureHelp();
-            return;
-        }
-        
-        var info = signatureWithMostParams(signature);
-        if(info == null) return;
-        activity().getBinding().symbolText.setText(formatSignature(info, signature.getActiveParameter()));
-        final var frag = findEditorByFile(file);
-        if(frag != null) {
-            final CodeEditor editor = frag.getEditor();
-            final float[] cursor = editor.getCursorPosition();
-        
-            float x = editor.updateCursorAnchor() - (activity().getBinding().symbolText.getWidth() / 2);
-            float y = activity().getBinding().editorAppBarLayout.getHeight() + (cursor[0] - editor.getRowHeight() - editor.getOffsetY() - activity().getBinding().symbolText.getHeight());
-            TransitionManager.beginDelayedTransition(activity().getBinding().getRoot());
-            activity().getBinding().symbolText.setVisibility(View.VISIBLE);
-            activity().positionViewWithinScreen(activity().getBinding().symbolText, x, y);
-        }
-    }
-    
-    /**
-     * Called by {@link io.github.rosemoe.editor.widget.CodeEditor CodeEditor} to hide signature help in EditorActivity
-     */
-    public void hideSignatureHelp() {
-        if(activity() == null) return;
-        TransitionManager.beginDelayedTransition(activity().getBinding().getRoot());
-        activity().getBinding().symbolText.setVisibility(View.GONE);
-    }
-     
-    /**
-     * Find the signature with most parameters
-     *
-     * @param signature The SignatureHelp provided by @{link IDELanguageServer}
-     */
-    private com.itsaky.lsp.models.SignatureInformation signatureWithMostParams(com.itsaky.lsp.models.SignatureHelp signature) {
-        com.itsaky.lsp.models.SignatureInformation signatureWithMostParams = null;
-        int mostParamCount = 0;
-        final var signatures = signature.getSignatures();
-        for(int i=0;i<signatures.size();i++) {
-            final var info = signatures.get(i);
-            int count = info.getParameters().size();
-            if(mostParamCount < count) {
-                mostParamCount = count;
-                signatureWithMostParams = info;
-            }
-        }
-        return signatureWithMostParams;
-    }
-
-    /**
-     * Formats (highlights) a method signature
-     *
-     * @param signature Signature information
-     * @param paramIndex Currently active parameter index
-     */
-    @NonNull
-    private CharSequence formatSignature(@NonNull SignatureInformation signature, int paramIndex) {
-        String name = signature.getLabel();
-        name = name.substring(0, name.indexOf("("));
-
-        SpannableStringBuilder sb = new SpannableStringBuilder();
-        sb.append(name, new ForegroundColorSpan(0xffffffff), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
-        sb.append("(", new ForegroundColorSpan(0xff4fc3f7), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
-
-        var params = signature.getParameters();
-        for(int i=0;i<params.size();i++) {
-            int color = i == paramIndex ? 0xffff6060 : 0xffffffff;
-            final var info = params.get(i);
-            if(i == params.size() - 1) {
-                sb.append(info.getLabel() + "", new ForegroundColorSpan(color), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
-            } else {
-                sb.append(info.getLabel() + "", new ForegroundColorSpan(color), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
-                sb.append(",", new ForegroundColorSpan(0xff4fc3f7), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
-                sb.append(" ");
-            }
-        }
-        sb.append(")", new ForegroundColorSpan(0xff4fc3f7), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
-        return sb;
-    }
-
     @Override
     public void publishDiagnostics(DiagnosticResult result) {
         boolean error = result == null;
@@ -324,7 +239,7 @@ public class IDELanguageClientImpl implements ILanguageClient {
     }
     
     /**
-     * Called by {@link io.github.rosemoe.editor.widget.CodeEditor CodeEditor} to show locations in EditorActivity
+     * Called by {@link IDEEditor IDEEditor} to show locations in EditorActivity
      */
     public void showLocations(List<Location> locations) {
     
@@ -356,7 +271,7 @@ public class IDELanguageClientImpl implements ILanguageClient {
                 Content content;
                 if (frag != null && frag.getEditor () != null)
                     content = frag.getEditor ().getText ();
-                else content = new Content (null, FileIOUtils.readFile2String (file));
+                else content = new Content (FileIOUtils.readFile2String (file));
                 final List<SearchResult> matches = results.containsKey (file) ? results.get (file) : new ArrayList<> ();
                 Objects.requireNonNull (matches).add (
                         new SearchResult (
@@ -383,11 +298,11 @@ public class IDELanguageClientImpl implements ILanguageClient {
     /**
      * Perform the given {@link CodeActionItem}
      *
-     * @param editor The {@link CodeEditor} that invoked the code action request.
+     * @param editor The {@link IDEEditor} that invoked the code action request.
      *            This is required to reduce the time finding the code action from the edits.
      * @param action The action to perform
      */
-    public void performCodeAction(CodeEditor editor, CodeActionItem action) {
+    public void performCodeAction(IDEEditor editor, CodeActionItem action) {
         if(activity() == null || editor == null || action == null) {
             StudioApp.getInstance().toast(R.string.msg_cannot_perform_fix, Toaster.Type.ERROR);
             return;
@@ -422,7 +337,7 @@ public class IDELanguageClientImpl implements ILanguageClient {
         return groups;
     }
     
-    private void showAvailableQuickfixes (CodeEditor editor, List<CodeActionItem> actions) {
+    private void showAvailableQuickfixes (IDEEditor editor, List<CodeActionItem> actions) {
         final MaterialAlertDialogBuilder builder = DialogUtils.newMaterialDialogBuilder (activity ());
         builder.setTitle(R.string.msg_code_actions);
         builder.setItems(asArray(actions), (d, w) -> {
@@ -442,14 +357,19 @@ public class IDELanguageClientImpl implements ILanguageClient {
         return arr;
     }
     
-    private Boolean performCodeActionAsync(final CodeEditor editor, final CodeActionItem action) {
+    private Boolean performCodeActionAsync(final IDEEditor editor, final CodeActionItem action) {
         final var changes = action.getChanges();
         if(changes.isEmpty()) {
             return Boolean.FALSE;
         }
         
         for(var change : changes) {
-            final File file = change.getFile ().toFile ();
+            final var path = change.getFile ();
+            if (path == null) {
+                continue;
+            }
+            
+            final File file = path.toFile ();
             if(!file.exists()) {
                 continue;
             }
@@ -480,7 +400,7 @@ public class IDELanguageClientImpl implements ILanguageClient {
         return Boolean.TRUE;
     }
     
-    private void editInEditor (final CodeEditor editor, final TextEdit edit) {
+    private void editInEditor (final IDEEditor editor, final TextEdit edit) {
         final Range range = edit.getRange();
         final int startLine = range.getStart().getLine();
         final int startCol = range.getStart().getColumn ();
diff --git a/app/src/main/java/com/itsaky/androidide/models/LogLine.java b/app/src/main/java/com/itsaky/androidide/models/LogLine.java
index 22c86b2bc..2bfcc93a4 100755
--- a/app/src/main/java/com/itsaky/androidide/models/LogLine.java
+++ b/app/src/main/java/com/itsaky/androidide/models/LogLine.java
@@ -1,4 +1,4 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  * 
  * AndroidIDE is free software: you can redistribute it and/or modify
@@ -14,16 +14,18 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
-**************************************************************************************/
+ */
 package com.itsaky.androidide.models;
 
 import android.content.Context;
 
 import androidx.annotation.NonNull;
 import androidx.core.content.ContextCompat;
+
 import com.itsaky.androidide.R;
+import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
+
 import java.util.Locale;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
 
 public class LogLine {
 	
@@ -42,14 +44,10 @@ public class LogLine {
 	public boolean formatted;
 	
 	// It makes things easier in LogLanguageImpl
-	public static final int INFO = EditorColorScheme.LOG_INFO;
-	public static final int DEBUG = EditorColorScheme.LOG_DEBUG;
-	public static final int ERROR = EditorColorScheme.LOG_ERROR;
-	public static final int WARNING = EditorColorScheme.LOG_WARNING;
-	
-	public LogLine(@NonNull LogLine src ) {
-		this(src.date, src.time, src.pid, src.tid, src.priorityChar, src.tag, src.message);
-	}
+	public static final int INFO = SchemeAndroidIDE.LOG_INFO;
+	public static final int DEBUG = SchemeAndroidIDE.LOG_DEBUG;
+	public static final int ERROR = SchemeAndroidIDE.LOG_ERROR;
+	public static final int WARNING = SchemeAndroidIDE.LOG_WARNING;
 	
 	public LogLine (String date, String time, String pid, String tid, String priorityChar, String tag, String message) {
 		this (date, time, pid, tid, priorityChar, tag, message, true);
@@ -122,6 +120,7 @@ public class LogLine {
 		return ContextCompat.getColor(ctx, id);
 	}
 
+	@NonNull
 	@Override
 	public String toString() {
 		return this.formatted ? String.format("%-6s %-13s %-6s %-6s %-2s %-40s %s", date, time, pid, tid, priorityChar, tag, message) : this.unformatted;
diff --git a/app/src/main/java/com/itsaky/androidide/syntax/colorschemes/SchemeAndroidIDE.java b/app/src/main/java/com/itsaky/androidide/syntax/colorschemes/SchemeAndroidIDE.java
index 3a69e13f5..1f565ddf0 100755
--- a/app/src/main/java/com/itsaky/androidide/syntax/colorschemes/SchemeAndroidIDE.java
+++ b/app/src/main/java/com/itsaky/androidide/syntax/colorschemes/SchemeAndroidIDE.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -16,21 +14,58 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
- **************************************************************************************/
+ */
 package com.itsaky.androidide.syntax.colorschemes;
 
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
+import org.w3c.dom.Text;
 
+import io.github.rosemoe.sora.lang.styling.TextStyle;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * Base class for editor color schemes in AndroidIDE.
+ * If you're implementing a color scheme for the IDE,
+ * this should be the base class instead of {@link EditorColorScheme}.
+ *
+ * @author Akash Yadav
+ */
 public class SchemeAndroidIDE extends EditorColorScheme {
     
+    private static int current = EditorColorScheme.END_COLOR_ID;
+    
+    public static final int LOG_INFO            = current++;
+    public static final int LOG_DEBUG           = current++;
+    public static final int LOG_ERROR           = current++;
+    public static final int LOG_WARNING         = current++;
+    public static final int DIAGNOSTIC_ERROR    = current++;
+    public static final int DIAGNOSTIC_WARNING  = current++;
+    public static final int DIAGNOSTIC_HINT     = current++;
+    public static final int DIAGNOSTIC_INFO     = current++;
+    public static final int STDERR              = current++;
+    public static final int STDOUT              = current++;
+    public static final int XML_TAG             = current++;
+    public static final int FIELD               = current++;
+    public static final int STATIC_FIELD        = current++;
+    public static final int PACKAGE_NAME        = current++;
+    public static final int ENUM_TYPE           = current++;
+    public static final int INTERFACE           = current++;
+    public static final int ENUM                = current++;
+    public static final int PARAMETER           = current++;
+    public static final int CONSTRUCTOR         = current++;
+    public static final int STATIC_INIT         = current++;
+    public static final int INSTANCE_INIT       = current++;
+    public static final int TYPE_PARAM          = current++;
+    public static final int RESOURCE_VARIABLE   = current++;
+    public static final int EXCEPTION_PARAM     = current++;
+    public static final int METHOD_DECLARATION  = current++;
+    public static final int METHOD_INVOCATION   = current++;
+    public static final int TYPE_NAME           = current++;
+    public static final int LOCAL_VARIABLE      = current++;
+    public static final int TODO_COMMENT        = current++;
+    public static final int FIXME_COMMENT       = current++;
+    
     @Override
     public void applyDefault () {
-        // Change the default comment color
-        // This will make sure that all javadoc elements
-        // which are not implemented in this scheme are 
-        // same as other comments
-        COMMENT_DEFAULT = 0xffbdbdbd;
-        
         // Apply default colors
         super.applyDefault ();
         
@@ -58,7 +93,6 @@ public class SchemeAndroidIDE extends EditorColorScheme {
         setColor (MATCHED_TEXT_BACKGROUND, 0xffFF8F00);
         setColor (NON_PRINTABLE_CHAR, 0xffdddddd);
         setColor (KEYWORD, 0xffff6060);
-        setColor (COMMENT, COMMENT_DEFAULT);
         setColor (OPERATOR, 0xff4fc3f7);
         setColor (LITERAL, 0xff8bc34a);
         setColor (TYPE_NAME, 0xff4fc3f7);
@@ -88,5 +122,51 @@ public class SchemeAndroidIDE extends EditorColorScheme {
         
         setColor (STDERR, 0xfff44336);
         setColor (STDOUT, 0xff4CAF50);
+        
+        setColor (TODO_COMMENT, 0xffffc400);
+        setColor (FIXME_COMMENT, 0xffffab00);
+        setColor (COMMENT, 0xffbdbdbd);
+    }
+    
+    /**
+     * Delegates to {@link TextStyle#makeStyle(int)}
+     * @param id The color id.
+     * @return The style flags.
+     */
+    public static long get (int id) {
+        return TextStyle.makeStyle (id);
+    }
+    
+    /**
+     * Create style for keywords. Convenient method to avoid calling {@link TextStyle#makeStyle(int, int, boolean, boolean, boolean)}
+     * @return The default style for keywords.
+     */
+    public static long forKeyword () {
+        return TextStyle.makeStyle (KEYWORD, WHOLE_BACKGROUND, true, false, false);
+    }
+    
+    /**
+     * Create style for string literals. The returned style sets the {@link TextStyle#NO_COMPLETION_BIT}.
+     * @return The style for string literals.
+     */
+    public static long forString () {
+        return TextStyle.makeStyle (LITERAL, true);
+    }
+    
+    /**
+     * Create color style for default comments.
+     * @return The style for {@link #COMMENT}.
+     */
+    public static long forComment () {
+        return TextStyle.makeStyle (COMMENT, true);
+    }
+    
+    /**
+     * Create style for the given id without completions.
+     * @param id The id to create style for.
+     * @return The style for the id.
+     */
+    public static long withoutCompletion (int id) {
+        return TextStyle.makeStyle (id, true);
     }
 }
diff --git a/app/src/main/java/com/itsaky/androidide/syntax/highlighters/JavaHighlighter.java b/app/src/main/java/com/itsaky/androidide/syntax/highlighters/JavaHighlighter.java
index 519a1b4ff..844fb7fa1 100644
--- a/app/src/main/java/com/itsaky/androidide/syntax/highlighters/JavaHighlighter.java
+++ b/app/src/main/java/com/itsaky/androidide/syntax/highlighters/JavaHighlighter.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *  
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -15,8 +13,7 @@
  * 
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
- *
-**************************************************************************************/
+ */
 package com.itsaky.androidide.syntax.highlighters;
 
 import android.text.SpannableStringBuilder;
@@ -24,13 +21,14 @@ import android.text.style.BackgroundColorSpan;
 import android.text.style.ForegroundColorSpan;
 import com.itsaky.androidide.lexers.java.JavaLexer;
 import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
 import java.io.StringReader;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.Token;
 
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
 public class JavaHighlighter implements Highlighter {
 
     @Override
@@ -159,7 +157,7 @@ public class JavaHighlighter implements Highlighter {
                 case JavaLexer.INT :
                 case JavaLexer.LONG:
                 case JavaLexer.SHORT:
-                    sb.append(token.getText(), new ForegroundColorSpan(scheme.getColor(EditorColorScheme.TYPE_NAME)), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+                    sb.append(token.getText(), new ForegroundColorSpan(scheme.getColor(SchemeAndroidIDE.TYPE_NAME)), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
                     break;
                 case JavaLexer.BLOCK_COMMENT :
                 case JavaLexer.LINE_COMMENT :
diff --git a/app/src/main/java/com/itsaky/androidide/utils/RecursiveFileSearcher.java b/app/src/main/java/com/itsaky/androidide/utils/RecursiveFileSearcher.java
index af7b931aa..d8d92ed37 100755
--- a/app/src/main/java/com/itsaky/androidide/utils/RecursiveFileSearcher.java
+++ b/app/src/main/java/com/itsaky/androidide/utils/RecursiveFileSearcher.java
@@ -26,8 +26,6 @@ import com.itsaky.androidide.tasks.TaskExecutor;
 import com.itsaky.lsp.models.Position;
 import com.itsaky.lsp.models.Range;
 
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.Content;
 import java.io.File;
 import java.io.FileFilter;
 import java.util.ArrayList;
@@ -38,6 +36,9 @@ import java.util.concurrent.Callable;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.Content;
+
 /**
  * This class provides API to search in files recursively
  *
@@ -97,7 +98,7 @@ public class RecursiveFileSearcher {
                     if(file.isDirectory()) continue;
                     final String text = FileIOUtils.readFile2String(file);
                     if(text == null || text.trim().isEmpty()) continue;
-                    final Content content = new Content(null, text);
+                    final Content content = new Content(text);
                     final List<SearchResult> ranges = new ArrayList<>();
                     Matcher matcher = Pattern.compile(Pattern.quote(this.query)).matcher(text);
                     while(matcher.find()) {
diff --git a/app/src/main/java/com/itsaky/androidide/views/Editor.java b/app/src/main/java/com/itsaky/androidide/views/Editor.java
deleted file mode 100755
index 525b0935c..000000000
--- a/app/src/main/java/com/itsaky/androidide/views/Editor.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/************************************************************************************
- * This file is part of AndroidIDE.
- *
- *  
- *
- * AndroidIDE is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * AndroidIDE is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
- *
-**************************************************************************************/
-
-
-package com.itsaky.androidide.views;
-
-import android.content.Context;
-import android.util.AttributeSet;
-import io.github.rosemoe.editor.widget.CodeEditor;
-
-public class Editor extends CodeEditor {
-    
-    public Editor(Context context) {
-        this(context, null);
-    }
-    
-    public Editor(Context context, AttributeSet attrs) {
-        this(context, attrs, 0);
-    }
-    
-    public Editor(Context context, AttributeSet attrs, int defStyleAttr) {
-        this(context, attrs, defStyleAttr, 0);
-    }
-    
-    public Editor(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-    }
-}
diff --git a/app/src/main/java/com/itsaky/androidide/views/SymbolInputView.java b/app/src/main/java/com/itsaky/androidide/views/SymbolInputView.java
index 132c06287..5560ed0b9 100755
--- a/app/src/main/java/com/itsaky/androidide/views/SymbolInputView.java
+++ b/app/src/main/java/com/itsaky/androidide/views/SymbolInputView.java
@@ -1,8 +1,6 @@
-/************************************************************************************
+/*
  * This file is part of AndroidIDE.
  *
- *  
- *
  * AndroidIDE is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -16,29 +14,17 @@
  * You should have received a copy of the GNU General Public License
  * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  *
-**************************************************************************************/
-
-
+ */
 package com.itsaky.androidide.views;
 
 import android.content.Context;
-import android.graphics.drawable.ColorDrawable;
 import android.util.AttributeSet;
-import android.view.Gravity;
-import android.widget.Button;
-import android.widget.HorizontalScrollView;
-import android.widget.LinearLayout;
-import androidx.core.content.ContextCompat;
-import androidx.core.widget.TextViewCompat;
-import com.itsaky.androidide.R;
-import com.itsaky.androidide.app.StudioApp;
-import com.itsaky.androidide.utils.TypefaceUtils;
-import io.github.rosemoe.editor.widget.CodeEditor;
-import io.github.rosemoe.editor.widget.SymbolChannel;
-import android.util.TypedValue;
-import androidx.recyclerview.widget.RecyclerView;
-import com.itsaky.androidide.adapters.SymbolInputAdapter;
+
 import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.itsaky.androidide.adapters.SymbolInputAdapter;
+import com.itsaky.androidide.views.editor.IDEEditor;
 
 public class SymbolInputView extends RecyclerView {
 	
@@ -57,7 +43,7 @@ public class SymbolInputView extends RecyclerView {
 		setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false));
 	}
 	
-	public void bindEditor(CodeEditor editor) {
+	public void bindEditor(IDEEditor editor) {
 		adapter = new SymbolInputAdapter(editor);
 		setAdapter(adapter);
 		setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false));
diff --git a/app/src/main/java/com/itsaky/androidide/views/CodeEditorView.java b/app/src/main/java/com/itsaky/androidide/views/editor/CodeEditorView.java
similarity index 78%
rename from app/src/main/java/com/itsaky/androidide/views/CodeEditorView.java
rename to app/src/main/java/com/itsaky/androidide/views/editor/CodeEditorView.java
index b380cce3d..44198784a 100644
--- a/app/src/main/java/com/itsaky/androidide/views/CodeEditorView.java
+++ b/app/src/main/java/com/itsaky/androidide/views/editor/CodeEditorView.java
@@ -1,385 +1,402 @@
-/*
- *  This file is part of AndroidIDE.
- *
- *  AndroidIDE is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *
- *  AndroidIDE is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
- */
-package com.itsaky.androidide.views;
-
-import android.annotation.SuppressLint;
-import android.content.Context;
-import android.view.LayoutInflater;
-import android.widget.FrameLayout;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import com.blankj.utilcode.util.FileIOUtils;
-import com.blankj.utilcode.util.SizeUtils;
-import com.itsaky.androidide.adapters.CompletionListAdapter;
-import com.itsaky.androidide.app.StudioApp;
-import com.itsaky.androidide.databinding.LayoutCodeEditorBinding;
-import com.itsaky.androidide.language.groovy.GroovyLanguage;
-import com.itsaky.androidide.language.java.JavaLanguage;
-import com.itsaky.androidide.language.xml.XMLLanguage;
-import com.itsaky.androidide.lexers.xml.XMLLexer;
-import com.itsaky.androidide.managers.PreferenceManager;
-import com.itsaky.androidide.models.ConstantsBridge;
-import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
-import com.itsaky.androidide.utils.LSPUtils;
-import com.itsaky.androidide.utils.Logger;
-import com.itsaky.androidide.utils.TypefaceUtils;
-import com.itsaky.inflater.values.ValuesTableFactory;
-import com.itsaky.lsp.models.Range;
-
-import org.antlr.v4.runtime.CharStreams;
-import org.antlr.v4.runtime.Token;
-
-import java.io.File;
-import java.io.StringReader;
-import java.nio.file.Files;
-import java.util.ArrayList;
-import java.util.Objects;
-import java.util.concurrent.CompletableFuture;
-
-import io.github.rosemoe.editor.interfaces.EditorEventListener;
-import io.github.rosemoe.editor.langs.EmptyLanguage;
-import io.github.rosemoe.editor.widget.CodeEditor;
-
-/**
- * A view that handles opened code editors.
- *
- * @author Akash Yadav
- */
-@SuppressLint("ViewConstructor") // This view is always dynamically created.
-public class CodeEditorView extends FrameLayout {
-    
-    private final File file;
-    private final LayoutCodeEditorBinding binding;
-    
-    private boolean isModified;
-    private boolean isFirstCreate;
-    
-    private static final Logger LOG = Logger.instance ("CodeEditorView");
-    
-    private final EditorEventListener mEventListener = new EditorEventListener () {
-        @Override
-        public boolean onRequestFormat (CodeEditor editor, boolean async) {
-            return false;
-        }
-        
-        @Override
-        public boolean onFormatFail (CodeEditor editor, Throwable cause) {
-            return false;
-        }
-        
-        @Override
-        public void onFormatSucceed (CodeEditor editor) {
-        }
-        
-        @Override
-        public void onNewTextSet (CodeEditor editor) {
-        }
-        
-        @Override
-        public void beforeReplace (CodeEditor editor, CharSequence content) {
-        }
-        
-        @Override
-        public void onSetSelection (int startLine, int startCol, int endLine, int endCol) {
-        }
-        
-        @Override
-        public void afterDelete (CodeEditor editor, CharSequence content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
-            isModified = true;
-        }
-        
-        @Override
-        public void afterInsert (CodeEditor editor, CharSequence content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
-            isModified = true;
-            if (file.getName ().endsWith (".xml")) {
-                boolean isOpen = false;
-                try {
-                    isOpen = editor.getText ().charAt (editor.getCursor ().getLeft () - 2) == '<';
-                } catch (Throwable th) {
-                    LOG.error (th);
-                }
-                
-                if (isOpen && insertedContent.toString ().equals ("/")) {
-                    closeCurrentTag (editor.getText ().toString (), endLine, endColumn);
-                }
-            }
-        }
-    };
-    
-    public CodeEditorView (@NonNull Context context, @NonNull File file, final @NonNull Range selection) {
-        super (context);
-        this.file = file;
-        this.isModified = false;
-        this.isFirstCreate = true;
-        
-        this.binding = LayoutCodeEditorBinding.inflate (LayoutInflater.from (context));
-        this.binding.editor.setOverScrollEnabled (false);
-        this.binding.editor.setTypefaceText (TypefaceUtils.jetbrainsMono ());
-        this.binding.editor.setTextActionMode (CodeEditor.TextActionMode.ACTION_MODE);
-        this.binding.editor.setHighlightCurrentBlock (true);
-        this.binding.editor.setEventListener (mEventListener);
-        this.binding.editor.setAutoCompletionOnComposing (true);
-        this.binding.editor.setAutoCompletionItemAdapter (new CompletionListAdapter ());
-        this.binding.editor.setLineColorsEnabled (true);
-        this.binding.editor.setDividerWidth (SizeUtils.dp2px (1));
-        this.binding.editor.setColorScheme (new SchemeAndroidIDE ());
-        
-        this.binding.diagnosticTextContainer.setVisibility (GONE);
-        
-        removeAllViews ();
-        addView (this.binding.getRoot ());
-        
-        selection.validate();
-        CompletableFuture.runAsync (() -> {
-            final var contents = FileIOUtils.readFile2String (file);
-            binding.editor.post (() -> {
-                binding.editor.setText (contents);
-                postRead ();
-                if (LSPUtils.isEqual (selection.getStart (), selection.getEnd ())) {
-                    getEditor ().setSelection (selection.getStart ().getLine (), selection.getStart ().getColumn ());
-                } else {
-                    getEditor ().setSelectionRegion (
-                            selection.getStart ().getLine (),
-                            selection.getStart ().getColumn (),
-                            selection.getEnd ().getLine (),
-                            selection.getEnd ().getColumn ()
-                    );
-                }
-            });
-        });
-    
-        configureEditorIfNeeded ();
-    }
-    
-    public boolean save () {
-        
-        if (getFile () == null) {
-            LOG.error ("Cannot save file. File instance is null.");
-            return false;
-        }
-        
-        final var path = getFile ().toPath ();
-        if (!isModified() && Files.exists (path)) {
-            LOG.info (getFile ());
-            LOG.info ("File was not modified. Skipping save operation.");
-            return false;
-        }
-    
-        final var lines = new ArrayList<> (getEditor ().getText ().getLines ());
-        try {
-            
-            Files.write (getFile ().toPath (), lines);
-            notifySaved ();
-            isModified = false;
-        
-            return true;
-        } catch (Throwable e) {
-            LOG.error ("Failed to save file", getFile (), "\n", e);
-            return false;
-        }
-    }
-    
-    public Editor getEditor () {
-        return binding.editor;
-    }
-    
-    public LayoutCodeEditorBinding getBinding () {
-        return binding;
-    }
-    
-    @Nullable
-    public File getFile () {
-        return file;
-    }
-    
-    public String getText () {
-        return binding.editor.getText ().toString ();
-    }
-    
-    public boolean isModified () {
-        return isModified;
-    }
-    
-    public void onPause () {
-        // unimplemented
-    }
-    
-    public void onResume () {
-        configureEditorIfNeeded ();
-    }
-    
-    public void undo () {
-        if (binding.editor.canUndo ()) {
-            binding.editor.undo ();
-        }
-    }
-    
-    public void redo () {
-        if (binding.editor.canRedo ()) {
-            binding.editor.redo ();
-        }
-    }
-    
-    public void findDefinition () {
-        binding.editor.findDefinition ();
-    }
-    
-    public void findReferences () {
-        binding.editor.findReferences ();
-    }
-    
-    public void commentLine () {
-        binding.editor.commentLine ();
-    }
-    
-    public void uncommentLine () {
-        binding.editor.uncommentLine ();
-    }
-    
-    public void beginSearch () {
-        binding.editor.beginSearchMode ();
-    }
-    
-    protected void postRead () {
-        if (file.isFile () && file.getName ().endsWith (".java")) {
-            binding.editor.setEditorLanguage (new JavaLanguage (), StudioApp.getInstance ().getJavaLanguageServer ());
-        } else if (file.isFile () && file.getName ().endsWith (".xml")) {
-            binding.editor.setEditorLanguage (new XMLLanguage (), StudioApp.getInstance ().getXMLLanguageServer ());
-        } else if (file.isFile () && file.getName ().endsWith (".gradle")) {
-            binding.editor.setEditorLanguage (new GroovyLanguage (), null);
-        } else {
-            binding.editor.setEditorLanguage (new EmptyLanguage (), null);
-        }
-        
-        // File must be set only after setting the language
-        // This will make sure that textDocument/didOpen is sent
-        binding.editor.setFile (getFile ());
-    }
-    
-    private void configureEditorIfNeeded () {
-        boolean sizeChanged = isFirstCreate || ConstantsBridge.EDITOR_PREF_SIZE_CHANGED;
-        boolean flagsChanged = isFirstCreate || ConstantsBridge.EDITOR_PREF_FLAGS_CHANGED;
-        boolean drawHexChanged = isFirstCreate || ConstantsBridge.EDITOR_PREF_DRAW_HEX_CHANGED;
-        final PreferenceManager prefs = StudioApp.getInstance ().getPrefManager ();
-        
-        if (sizeChanged) {
-            float textSize = prefs.getFloat (PreferenceManager.KEY_EDITOR_FONT_SIZE);
-            if (textSize < 6 || textSize > 32) {
-                textSize = 14;
-            }
-            
-            binding.editor.setTextSize (textSize);
-            ConstantsBridge.EDITOR_PREF_SIZE_CHANGED = false;
-        }
-        
-        if (flagsChanged) {
-            int flags = 0;
-            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_LEADING, true)) {
-                flags |= CodeEditor.FLAG_DRAW_WHITESPACE_LEADING;
-            }
-            
-            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_TRAILING, false)) {
-                flags |= CodeEditor.FLAG_DRAW_WHITESPACE_TRAILING;
-            }
-            
-            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_INNER, true)) {
-                flags |= CodeEditor.FLAG_DRAW_WHITESPACE_INNER;
-            }
-            
-            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_EMPTY_LINE, true)) {
-                flags |= CodeEditor.FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE;
-            }
-            
-            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_LINE_BREAK, true)) {
-                flags |= CodeEditor.FLAG_DRAW_LINE_SEPARATOR;
-            }
-            
-            binding.editor.setNonPrintablePaintingFlags (flags);
-            ConstantsBridge.EDITOR_PREF_FLAGS_CHANGED = false;
-        }
-        
-        if (drawHexChanged) {
-            binding.editor.setLineColorsEnabled (prefs.getBoolean (PreferenceManager.KEY_EDITOR_DRAW_HEX, true));
-            ConstantsBridge.EDITOR_PREF_DRAW_HEX_CHANGED = false;
-        }
-        
-        isFirstCreate = false;
-    }
-    
-    private void closeCurrentTag (String text, int line, int col) {
-        try {
-            XMLLexer lexer = new XMLLexer (CharStreams.fromReader (new StringReader (text)));
-            Token token;
-            boolean wasSlash = false, wasOpen = false;
-            ArrayList<String> currentNames = new ArrayList<> ();
-            while (((token = lexer.nextToken ()) != null && token.getType () != token.EOF)) {
-                final int type = token.getType ();
-                if (type == XMLLexer.OPEN) {
-                    wasOpen = true;
-                } else if (type == XMLLexer.Name) {
-                    if (wasOpen && wasSlash && currentNames.size () > 0) {
-                        currentNames.remove (0);
-                    } else if (wasOpen) {
-                        currentNames.add (0, token.getText ());
-                        wasOpen = false;
-                    }
-                } else if (type == XMLLexer.OPEN_SLASH) {
-                    int l = token.getLine () - 1;
-                    int c = token.getCharPositionInLine ();
-                    if (l == line && c == col) {
-                        break;
-                    } else if (currentNames.size () > 0) {
-                        currentNames.remove (0);
-                    }
-                } else if (type == XMLLexer.SLASH_CLOSE
-                        || type == XMLLexer.SPECIAL_CLOSE) {
-                    if (currentNames.size () > 0 && token.getText ().trim ().endsWith ("/>")) {
-                        currentNames.remove (0);
-                    }
-                } else if (type == XMLLexer.SLASH) {
-                    wasSlash = true;
-                } else {
-                    wasOpen = wasSlash = false;
-                }
-            }
-            
-            if (currentNames.size () > 0) {
-                binding.editor.getText ().insert (line, col + 2, currentNames.get (0));
-            }
-        } catch (Throwable th) {
-            LOG.error ("Unable to close current tag", th);
-        }
-    }
-    
-    private void notifySaved () {
-        binding.editor.didSave ();
-        
-        if (Objects.requireNonNull (getFile ()).getName ().endsWith (".xml")) {
-            ValuesTableFactory.syncWithFile (getFile ());
-        }
-    }
-    
-    /**
-     * Mark this files as saved. Even if it not saved.
-     */
-    public void markAsSaved () {
-        isModified = false;
-        notifySaved ();
-    }
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.itsaky.androidide.views.editor;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.widget.FrameLayout;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.blankj.utilcode.util.FileIOUtils;
+import com.blankj.utilcode.util.SizeUtils;
+import com.itsaky.androidide.adapters.CompletionListAdapter;
+import com.itsaky.androidide.app.StudioApp;
+import com.itsaky.androidide.databinding.LayoutCodeEditorBinding;
+import com.itsaky.androidide.language.groovy.GroovyLanguage;
+import com.itsaky.androidide.language.java.JavaLanguage;
+import com.itsaky.androidide.language.xml.XMLLanguage;
+import com.itsaky.androidide.lexers.xml.XMLLexer;
+import com.itsaky.androidide.managers.PreferenceManager;
+import com.itsaky.androidide.models.ConstantsBridge;
+import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
+import com.itsaky.androidide.utils.LSPUtils;
+import com.itsaky.androidide.utils.Logger;
+import com.itsaky.androidide.utils.TypefaceUtils;
+import com.itsaky.androidide.views.editor.IDEEditor;
+import com.itsaky.inflater.values.ValuesTableFactory;
+import com.itsaky.lsp.models.Range;
+
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.Token;
+
+import java.io.File;
+import java.io.StringReader;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+
+import io.github.rosemoe.sora.event.ContentChangeEvent;
+import io.github.rosemoe.sora.lang.EmptyLanguage;
+import io.github.rosemoe.sora.text.Content;
+
+/**
+ * A view that handles opened code editors.
+ *
+ * @author Akash Yadav
+ */
+@SuppressLint("ViewConstructor") // This view is always dynamically created.
+public class CodeEditorView extends FrameLayout {
+    
+    private final File file;
+    private final LayoutCodeEditorBinding binding;
+    
+    private boolean isModified;
+    private boolean isFirstCreate;
+    
+    private static final Logger LOG = Logger.instance ("CodeEditorView");
+    
+    public CodeEditorView (@NonNull Context context, @NonNull File file, final @NonNull Range selection) {
+        super (context);
+        this.file = file;
+        this.isModified = false;
+        this.isFirstCreate = true;
+        
+        this.binding = LayoutCodeEditorBinding.inflate (LayoutInflater.from (context));
+        this.binding.editor.setTypefaceText (TypefaceUtils.jetbrainsMono ());
+        this.binding.editor.setHighlightCurrentBlock (true);
+        this.binding.editor.getProps().autoCompletionOnComposing = true;
+        this.binding.editor.setAutoCompletionItemAdapter (new CompletionListAdapter ());
+        this.binding.editor.setDividerWidth (SizeUtils.dp2px (1));
+        this.binding.editor.setColorScheme (new SchemeAndroidIDE ());
+        this.binding.editor.subscribeEvent (ContentChangeEvent.class, ((event, unsubscribe) -> handleContentChange (event)));
+        
+        this.binding.diagnosticTextContainer.setVisibility (GONE);
+        
+        removeAllViews ();
+        addView (this.binding.getRoot ());
+        
+        selection.validate();
+        CompletableFuture.runAsync (() -> {
+            final var contents = FileIOUtils.readFile2String (file);
+            binding.editor.post (() -> {
+                binding.editor.setText (contents, createEditorArgs());
+                postRead ();
+                if (LSPUtils.isEqual (selection.getStart (), selection.getEnd ())) {
+                    getEditor ().setSelection (selection.getStart ().getLine (), selection.getStart ().getColumn ());
+                } else {
+                    getEditor ().setSelectionRegion (
+                            selection.getStart ().getLine (),
+                            selection.getStart ().getColumn (),
+                            selection.getEnd ().getLine (),
+                            selection.getEnd ().getColumn ()
+                    );
+                }
+            });
+        });
+    
+        configureEditorIfNeeded ();
+    }
+    
+    @NonNull
+    private Bundle createEditorArgs () {
+        var bundle = new Bundle ();
+        if (getFile () == null) {
+            return bundle;
+        }
+        
+        bundle.putString (IDEEditor.KEY_FILE, getFile ().getAbsolutePath ());
+        return bundle;
+    }
+    
+    private void handleContentChange (@NonNull ContentChangeEvent event) {
+        isModified = true;
+        
+        if (event.getAction () == ContentChangeEvent.ACTION_INSERT) {
+            final var editor = event.getEditor ();
+            final var content = event.getChangedText ();
+            final var endLine = event.getChangeEnd ().line;
+            final var endColumn = event.getChangeEnd ().column;
+            if (file.getName ().endsWith (".xml")) {
+                boolean isOpen = false;
+                try {
+                    isOpen = editor.getText ().charAt (editor.getCursor ().getLeft () - 2) == '<';
+                } catch (Throwable th) {
+                    LOG.error (th);
+                }
+                
+                if (isOpen && "/".contentEquals (content)) {
+                    closeCurrentTag (editor.getText ().toString (), endLine, endColumn);
+                }
+            }
+        }
+    }
+    
+    public boolean save () {
+        
+        if (getFile () == null) {
+            LOG.error ("Cannot save file. File instance is null.");
+            return false;
+        }
+        
+        final var path = getFile ().toPath ();
+        if (!isModified() && Files.exists (path)) {
+            LOG.info (getFile ());
+            LOG.info ("File was not modified. Skipping save operation.");
+            return false;
+        }
+        
+        final var lines = getLines (getEditor ().getText ());
+        try {
+            
+            Files.write (getFile ().toPath (), lines);
+            notifySaved ();
+            isModified = false;
+        
+            return true;
+        } catch (Throwable e) {
+            LOG.error ("Failed to save file", getFile (), "\n", e);
+            return false;
+        }
+    }
+    
+    @NonNull
+    private List<CharSequence> getLines (Content text) {
+        final var count = text.getLineCount ();
+        final var result = new ArrayList<CharSequence> ();
+    
+        for (int i = 0; i < count; i++) {
+            result.add (text.getLine (i));
+        }
+        
+        return result;
+    }
+    
+    public IDEEditor getEditor () {
+        return binding.editor;
+    }
+    
+    public LayoutCodeEditorBinding getBinding () {
+        return binding;
+    }
+    
+    @Nullable
+    public File getFile () {
+        return file;
+    }
+    
+    public String getText () {
+        return binding.editor.getText ().toString ();
+    }
+    
+    public boolean isModified () {
+        return isModified;
+    }
+    
+    public void onPause () {
+        // unimplemented
+    }
+    
+    public void onResume () {
+        configureEditorIfNeeded ();
+    }
+    
+    public void undo () {
+        if (binding.editor.canUndo ()) {
+            binding.editor.undo ();
+        }
+    }
+    
+    public void redo () {
+        if (binding.editor.canRedo ()) {
+            binding.editor.redo ();
+        }
+    }
+    
+    public void findDefinition () {
+        binding.editor.findDefinition ();
+    }
+    
+    public void findReferences () {
+        binding.editor.findReferences ();
+    }
+    
+    public void commentLine () {
+        binding.editor.commentLine ();
+    }
+    
+    public void uncommentLine () {
+        binding.editor.uncommentLine ();
+    }
+    
+    public void beginSearch () {
+        binding.editor.beginSearchMode ();
+    }
+    
+    protected void postRead () {
+        if (file.isFile () && file.getName ().endsWith (".java")) {
+            binding.editor.setEditorLanguage (new JavaLanguage ());
+            binding.editor.setLanguageServer (StudioApp.getInstance ().getJavaLanguageServer ());
+        } else if (file.isFile () && file.getName ().endsWith (".xml")) {
+            binding.editor.setEditorLanguage (new XMLLanguage ());
+            binding.editor.setLanguageServer (StudioApp.getInstance ().getXMLLanguageServer ());
+        } else if (file.isFile () && file.getName ().endsWith (".gradle")) {
+            binding.editor.setEditorLanguage (new GroovyLanguage ());
+        } else {
+            binding.editor.setEditorLanguage (new EmptyLanguage ());
+        }
+        
+        // File must be set only after setting the language server
+        // This will make sure that textDocument/didOpen is sent
+        binding.editor.setFile (getFile ());
+    }
+    
+    private void configureEditorIfNeeded () {
+        boolean sizeChanged = isFirstCreate || ConstantsBridge.EDITOR_PREF_SIZE_CHANGED;
+        boolean flagsChanged = isFirstCreate || ConstantsBridge.EDITOR_PREF_FLAGS_CHANGED;
+        boolean drawHexChanged = isFirstCreate || ConstantsBridge.EDITOR_PREF_DRAW_HEX_CHANGED;
+        final PreferenceManager prefs = StudioApp.getInstance ().getPrefManager ();
+        
+        if (sizeChanged) {
+            float textSize = prefs.getFloat (PreferenceManager.KEY_EDITOR_FONT_SIZE);
+            if (textSize < 6 || textSize > 32) {
+                textSize = 14;
+            }
+            
+            binding.editor.setTextSize (textSize);
+            ConstantsBridge.EDITOR_PREF_SIZE_CHANGED = false;
+        }
+        
+        if (flagsChanged) {
+            int flags = 0;
+            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_LEADING, true)) {
+                flags |= IDEEditor.FLAG_DRAW_WHITESPACE_LEADING;
+            }
+            
+            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_TRAILING, false)) {
+                flags |= IDEEditor.FLAG_DRAW_WHITESPACE_TRAILING;
+            }
+            
+            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_INNER, true)) {
+                flags |= IDEEditor.FLAG_DRAW_WHITESPACE_INNER;
+            }
+            
+            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_WS_EMPTY_LINE, true)) {
+                flags |= IDEEditor.FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE;
+            }
+            
+            if (prefs.getBoolean (PreferenceManager.KEY_EDITOR_FLAG_LINE_BREAK, true)) {
+                flags |= IDEEditor.FLAG_DRAW_LINE_SEPARATOR;
+            }
+            
+            binding.editor.setNonPrintablePaintingFlags (flags);
+            ConstantsBridge.EDITOR_PREF_FLAGS_CHANGED = false;
+        }
+        
+        if (drawHexChanged) {
+            // TODO Do something about this
+            //     Maybe use spans...
+//            binding.editor.setLineColorsEnabled (prefs.getBoolean (PreferenceManager.KEY_EDITOR_DRAW_HEX, true));
+            ConstantsBridge.EDITOR_PREF_DRAW_HEX_CHANGED = false;
+        }
+        
+        isFirstCreate = false;
+    }
+    
+    private void closeCurrentTag (String text, int line, int col) {
+        try {
+            XMLLexer lexer = new XMLLexer (CharStreams.fromReader (new StringReader (text)));
+            Token token;
+            boolean wasSlash = false, wasOpen = false;
+            ArrayList<String> currentNames = new ArrayList<> ();
+            while (((token = lexer.nextToken ()) != null && token.getType () != token.EOF)) {
+                final int type = token.getType ();
+                if (type == XMLLexer.OPEN) {
+                    wasOpen = true;
+                } else if (type == XMLLexer.Name) {
+                    if (wasOpen && wasSlash && currentNames.size () > 0) {
+                        currentNames.remove (0);
+                    } else if (wasOpen) {
+                        currentNames.add (0, token.getText ());
+                        wasOpen = false;
+                    }
+                } else if (type == XMLLexer.OPEN_SLASH) {
+                    int l = token.getLine () - 1;
+                    int c = token.getCharPositionInLine ();
+                    if (l == line && c == col) {
+                        break;
+                    } else if (currentNames.size () > 0) {
+                        currentNames.remove (0);
+                    }
+                } else if (type == XMLLexer.SLASH_CLOSE
+                        || type == XMLLexer.SPECIAL_CLOSE) {
+                    if (currentNames.size () > 0 && token.getText ().trim ().endsWith ("/>")) {
+                        currentNames.remove (0);
+                    }
+                } else if (type == XMLLexer.SLASH) {
+                    wasSlash = true;
+                } else {
+                    wasOpen = wasSlash = false;
+                }
+            }
+            
+            if (currentNames.size () > 0) {
+                binding.editor.getText ().insert (line, col + 2, currentNames.get (0));
+            }
+        } catch (Throwable th) {
+            LOG.error ("Unable to close current tag", th);
+        }
+    }
+    
+    private void notifySaved () {
+        binding.editor.didSave ();
+        
+        if (Objects.requireNonNull (getFile ()).getName ().endsWith (".xml")) {
+            ValuesTableFactory.syncWithFile (getFile ());
+        }
+    }
+    
+    /**
+     * Mark this files as saved. Even if it not saved.
+     */
+    public void markAsSaved () {
+        isModified = false;
+        notifySaved ();
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/itsaky/androidide/views/editor/IDEEditor.java b/app/src/main/java/com/itsaky/androidide/views/editor/IDEEditor.java
new file mode 100644
index 000000000..c527039b9
--- /dev/null
+++ b/app/src/main/java/com/itsaky/androidide/views/editor/IDEEditor.java
@@ -0,0 +1,612 @@
+/*
+ * This file is part of AndroidIDE.
+ *
+ * AndroidIDE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * AndroidIDE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.itsaky.androidide.views.editor;
+
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.inputmethod.EditorInfo;
+
+import androidx.annotation.NonNull;
+
+import com.blankj.utilcode.util.ThreadUtils;
+import com.itsaky.androidide.R;
+import com.itsaky.androidide.app.StudioApp;
+import com.itsaky.androidide.lsp.IDELanguageClientImpl;
+import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
+import com.itsaky.androidide.utils.Logger;
+import com.itsaky.lsp.api.ILanguageServer;
+import com.itsaky.lsp.models.CodeActionParams;
+import com.itsaky.lsp.models.CodeActionResult;
+import com.itsaky.lsp.models.DefinitionResult;
+import com.itsaky.lsp.models.DiagnosticItem;
+import com.itsaky.lsp.models.DocumentChangeEvent;
+import com.itsaky.lsp.models.DocumentCloseEvent;
+import com.itsaky.lsp.models.DocumentOpenEvent;
+import com.itsaky.lsp.models.DocumentSaveEvent;
+import com.itsaky.lsp.models.ExpandSelectionParams;
+import com.itsaky.lsp.models.Position;
+import com.itsaky.lsp.models.Range;
+import com.itsaky.lsp.models.ReferenceParams;
+import com.itsaky.lsp.models.ReferenceResult;
+import com.itsaky.lsp.models.ShowDocumentParams;
+import com.itsaky.lsp.models.SignatureHelp;
+import com.itsaky.lsp.models.SignatureHelpParams;
+import com.itsaky.toaster.Toaster;
+
+import java.io.File;
+import java.lang.reflect.Field;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import io.github.rosemoe.sora.event.ContentChangeEvent;
+import io.github.rosemoe.sora.widget.CodeEditor;
+import io.github.rosemoe.sora.widget.layout.Layout;
+
+public class IDEEditor extends CodeEditor {
+    
+    private int mFileVersion;
+    private File file;
+    
+    private ILanguageServer mLanguageServer;
+    private IDELanguageClientImpl mLanguageClient;
+    private SignatureHelpWindow mSignatureHelpWindow;
+    
+    public static final String KEY_FILE = "editor_file";
+    private static final Logger LOG = Logger.instance ("IDEEditor");
+    
+    public IDEEditor (Context context) {
+        this(context, null);
+    }
+    
+    public IDEEditor (Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+    
+    public IDEEditor (Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+    
+    public IDEEditor (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        
+        setColorScheme (new SchemeAndroidIDE ());
+        subscribeEvent (ContentChangeEvent.class, (event, unsubscribe) -> notifyContentChanged ());
+        
+        // default editor input type + no suggestions flag
+        setInputType (EditorInfo.TYPE_CLASS_TEXT
+                | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE
+                | EditorInfo.TYPE_TEXT_FLAG_NO_SUGGESTIONS
+                | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
+    }
+    
+    /**
+     * Set selection to the given range.
+     * @param range The range to select.
+     */
+    public void setSelection (@NonNull Range range) {
+        setSelectionRegion (range.getStart ().getLine (),
+                range.getStart ().getColumn (),
+                range.getEnd ().getLine (),
+                range.getEnd ().getColumn ());
+    }
+    
+    /**
+     * Set the file that this editor is currently editing.
+     * @param file The file to set.
+     */
+    public void setFile (File file) {
+        this.file = file;
+    
+        if (file != null && mLanguageServer != null) {
+            final var text = getText ().toString ();
+            final var event = new DocumentOpenEvent (file.toPath (), text, mFileVersion = 0);
+            mLanguageServer.getDocumentHandler ().onFileOpened (event);
+        }
+        
+        if (file != null) {
+            getExtraArguments ().putString (KEY_FILE, file.getAbsolutePath ());
+        } else {
+            getExtraArguments ().remove (KEY_FILE);
+        }
+    }
+    
+    /**
+     * Get the file that this editor is currently editing.
+     * @return The file instance.
+     */
+    public File getFile () {
+        return file;
+    }
+    
+    /**
+     * Set the language server that this editor will connect with.
+     * If the language client is not set, it'll be set to {@link IDELanguageClientImpl}.
+     *
+     * @param server The server to set. Provide <code>null</code> to
+     *               disable all the language server features.
+     */
+    public void setLanguageServer (ILanguageServer server) {
+        this.mLanguageServer = server;
+        
+        if (mLanguageClient == null && IDELanguageClientImpl.isInitialized ()) {
+            mLanguageClient = IDELanguageClientImpl.getInstance ();
+        }
+    }
+    
+    /**
+     * Append the given text at the end of the editor's content.
+     * @param text The text to append.
+     * @return The line at which the text was appended.
+     */
+    public int append (CharSequence text) {
+        final var content = getText ();
+        if (getLineCount () <= 0) {
+            return 0;
+        }
+        final int line = getLineCount () - 1;
+        int col = content.getColumnCount (line);
+        if (col < 0) {
+            col = 0;
+        }
+        content.insert (line, col, text);
+        return line;
+    }
+    
+    /**
+     * Set the selection of the editor's cursor
+     * to the last line of the it's content.
+     */
+    public void goToEnd () {
+        final var line = getText ().getLineCount () - 1;
+        setSelection (line, 0);
+    }
+    
+    /**
+     * @see CodeEditor#updateCursorAnchor()
+     */
+    public float updateCursorAnchor () {
+        return super.updateCursorAnchor ();
+    }
+    
+    /**
+     * The the coordinates of the left cursor.
+     * @return A <code>float[]</code> containing the cursor position.
+     */
+    public float[] getCursorPosition () {
+        return getLayout().getCharLayoutOffset (getCursor ().getLeftLine (), getCursor ().getLeftColumn ());
+    }
+    
+    /**
+     * Comment the line of the left cursor.
+     */
+    public void commentLine () {
+        if (getFile () == null) {
+            return;
+        }
+    
+        final var text = getText ();
+        final var name = getFile ().getName ();
+        int line = getCursor ().getLeftLine ();
+        if (name.endsWith (".java") || name.endsWith (".gradle")) {
+            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
+                if (!text.getLineString (line).trim ().startsWith ("//")) {
+                    text.insert (line, 0, "//");
+                }
+                line++;
+            }
+        } else if (name.endsWith (".xml")) {
+            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
+                final String lineString = text.getLineString (line);
+                if (!lineString.trim ().startsWith ("<!--")
+                        && !lineString.trim ().endsWith ("-->")) {
+                    text.replace (line, 0, line, text.getColumnCount (line), "<!--".concat (lineString).concat ("-->"));
+                }
+                line++;
+            }
+        }
+    }
+    
+    /**
+     * Uncomment the current line
+     */
+    public void uncommentLine () {
+        if (getFile () == null) {
+            return;
+        }
+        
+        final var text = getText ();
+        final String name = getFile ().getName ();
+        int line = getCursor ().getLeftLine ();
+        if (name.endsWith (".java") || name.endsWith (".gradle")) {
+            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
+                String l = text.getLineString (line);
+                if (l.trim ().startsWith ("//")) {
+                    int i = l.indexOf ("//");
+                    text.delete (line, i, line, i + 2);
+                }
+                line++;
+            }
+        } else if (name.endsWith (".xml")) {
+            final String commentStart = "<!--";
+            final String commentEnd = "-->";
+            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
+                String l = text.getLineString (line);
+                if (l.trim ().startsWith (commentStart)) {
+                    int i = l.indexOf (commentStart);
+                    text.delete (line, i, line, i + commentStart.length ());
+                }
+                if (l.trim ().endsWith (commentEnd)) {
+                    int count = text.getColumnCount (line);
+                    text.delete (line, count - commentEnd.length (), line, count);
+                }
+                line++;
+            }
+        }
+    }
+    
+    /**
+     * If any language server is set, asks the language server
+     * to find the definition of token at the cursor position.
+     * <p>
+     * If the server returns a valid response, and the file specified
+     * in the response is same the file in this editor,
+     * the range specified in the response will be selected.
+     * </p>
+     */
+    @SuppressWarnings ("deprecation")
+    public void findDefinition () {
+        if (getFile () == null) {
+            return;
+        }
+        
+        final ProgressDialog pd = ProgressDialog.show (getContext (), null, getContext ().getString (R.string.msg_finding_definition));
+        
+        try {
+            final CompletableFuture<DefinitionResult> future = CompletableFuture.supplyAsync (() -> {
+                final var provider = mLanguageServer.getDefinitionProvider ();
+                final var params = new com.itsaky.lsp.models.DefinitionParams (
+                        getFile ().toPath (),
+                        new com.itsaky.lsp.models.Position (
+                                getCursor ().getLeftLine (),
+                                getCursor ().getLeftColumn ()
+                        )
+                );
+                
+                return provider.findDefinitions (params);
+            });
+            
+            future.whenComplete ((result, error) -> {
+                
+                if (result == null
+                        || mLanguageClient == null
+                        || future.isCancelled ()
+                        || future.isCompletedExceptionally ()
+                ) {
+                    LOG.error ("An error occurred while finding definition", error);
+                    showDefinitionNotFound (pd);
+                    return;
+                }
+                
+                final var locations = result.getLocations ();
+                if (locations.size () <= 0) {
+                    LOG.error ("No definitions found", "Size:", locations.size ());
+                    showDefinitionNotFound (pd);
+                    return;
+                }
+                
+                ThreadUtils.runOnUiThread (() -> {
+                    if (locations.size () == 1) {
+                        var location = locations.get (0);
+                        if (location.getFile ().equals (getFile ().toPath ())) {
+                            setSelection (location.getRange ());
+                            return;
+                        }
+                        mLanguageClient.showDocument (new ShowDocumentParams (location.getFile (), location.getRange ()));
+                    } else {
+                        mLanguageClient.showLocations (locations);
+                    }
+                });
+                
+                dismissOnUiThread (pd);
+            });
+        } catch (Throwable th) {
+            LOG.error ("An error occurred while finding definition", th);
+            showDefinitionNotFound (pd);
+        }
+    }
+    
+    /**
+     * Notify the user that no definitions can be found.
+     * @param pd The {@link ProgressDialog} that was shown when requesting the definitions.
+     */
+    @SuppressWarnings ("deprecation")
+    private void showDefinitionNotFound (final ProgressDialog pd) {
+        ThreadUtils.runOnUiThread (() -> {
+            StudioApp.getInstance ().toast (R.string.msg_no_definition, Toaster.Type.ERROR);
+            pd.dismiss ();
+        });
+    }
+    
+    /**
+     * If any language server instance is set,
+     * finds the references to of the token at the current cursor position.
+     *
+     * If the server returns a valid response, that response is forwarded
+     * to the {@link IDELanguageClientImpl}.
+     */
+    public void findReferences () {
+        if (getFile () == null) {
+            return;
+        }
+        
+        @SuppressWarnings ("deprecation")
+        final ProgressDialog pd = ProgressDialog.show (getContext (), null, getContext ().getString (R.string.msg_finding_references));
+        
+        try {
+            final CompletableFuture<ReferenceResult> future = CompletableFuture.supplyAsync (() -> {
+                final var provider = mLanguageServer.getReferenceProvider ();
+                final var referenceParams = new ReferenceParams (
+                        getFile ().toPath (),
+                        new com.itsaky.lsp.models.Position (
+                                getCursor ().getLeftLine (),
+                                getCursor ().getLeftColumn ()),
+                        true);
+                return provider.findReferences (referenceParams);
+            });
+            
+            future.whenComplete ((result, error) -> {
+                
+                if (result == null
+                        || mLanguageClient == null
+                        || future.isCancelled ()
+                        || future.isCompletedExceptionally ()
+                ) {
+                    LOG.error ("An error occurred while finding references", error);
+                    showReferencesNotFound (pd);
+                    return;
+                }
+                
+                if (result.getLocations ().isEmpty ()) {
+                    showReferencesNotFound (pd);
+                    return;
+                } else {
+                    if (result.getLocations ().size () == 1) {
+                        final var loc = result.getLocations ().get (0);
+                        if (loc.getFile ().equals (getFile ().toPath ())) {
+                            setSelection (loc.getRange ());
+                            return;
+                        }
+                    }
+                    
+                    ThreadUtils.runOnUiThread (() -> mLanguageClient.showLocations (result.getLocations ()));
+                }
+                
+                dismissOnUiThread (pd);
+            });
+        } catch (Throwable th) {
+            LOG.error ("An error occurred while finding references", th);
+            showReferencesNotFound (pd);
+        }
+    }
+    
+    /**
+     * Notify the user that no references were found for the selected token.
+     * @param pd The {@link ProgressDialog} that was shown when requesting references.
+     */
+    @SuppressWarnings("deprecation")
+    private void showReferencesNotFound (final ProgressDialog pd) {
+        ThreadUtils.runOnUiThread (() -> {
+            StudioApp.getInstance ().toast (R.string.msg_no_references, Toaster.Type.ERROR);
+            pd.dismiss ();
+        });
+    }
+    
+    /**
+     * If any language server is set, requests signature help at the cursor's position.
+     * On a valid response, shows the signature help in a popup window.
+     */
+    @SuppressWarnings("unused")  // accessed using reflection in CompletionItem class
+    public void signatureHelp () {
+        if (mLanguageServer != null && getFile () != null) {
+            final CompletableFuture<SignatureHelp> future = CompletableFuture.supplyAsync (() -> {
+                final var provider = mLanguageServer.getSignatureHelpProvider ();
+                return provider.provideSignatures (new SignatureHelpParams (getFile ().toPath (), new com.itsaky.lsp.models.Position (
+                        getCursor ().getLeftLine (),
+                        getCursor ().getLeftColumn ()
+                )));
+            });
+            
+            future.whenComplete ((help, error) -> {
+                if (help == null
+                        || mLanguageClient == null
+                        || future.isCancelled ()
+                        || future.isCompletedExceptionally ()
+                ) {
+                    LOG.error ("An error occurred while finding signature help", error);
+                    return;
+                }
+                
+                ThreadUtils.runOnUiThread (() -> showSignatureHelp (help));
+            });
+        }
+    }
+    
+    public void showSignatureHelp (SignatureHelp help) {
+        getSignatureHelpWindow ().setSignatureHelp (help);
+        getSignatureHelpWindow ().show ();
+    }
+    
+    /**
+     * Dismisses the given dialog on the UI thread.
+     * @param dialog The dialog to dismiss.
+     */
+    private void dismissOnUiThread (@NonNull final Dialog dialog) {
+        ThreadUtils.runOnUiThread (dialog::dismiss);
+    }
+    
+    /**
+     * If any language server is set, notify the server that the file in this editor was saved.
+     */
+    public void didSave () {
+        if (mLanguageServer != null && getFile () != null) {
+            mLanguageServer.getDocumentHandler ().onFileSaved (
+                    new DocumentSaveEvent (getFile ().toPath ())
+            );
+        }
+    }
+    
+    /**
+     * Notify the language server that the file in this editor is about to be closed.
+     */
+    public void close () {
+        if (mLanguageServer != null && getFile () != null) {
+            mLanguageServer.getDocumentHandler ().onFileClosed (
+                    new DocumentCloseEvent (getFile ().toPath ())
+            );
+            LOG.info ("'textDocument/didClose' was sent to the language server.");
+        } else {
+            LOG.info ("No language server is available for this file");
+        }
+    }
+    
+    /**
+     * Request code actions from server at the given position containing given diagnostics
+     *
+     * @return A {@link CompletableFuture}. May return {@code null}.
+     */
+    public CompletableFuture<CodeActionResult> codeActions () {
+        // TODO Implement this properly
+        return CompletableFuture.completedFuture (new CodeActionResult ());
+    }
+    
+    /**
+     * Requests code actions for the given diagnostics to the language server.
+     * @param diagnostics The diagnostics to request code actions for.
+     * @return The {@link CodeActionResult} from the server.
+     */
+    public CompletableFuture<CodeActionResult> codeActions (List<DiagnosticItem> diagnostics) {
+        if (mLanguageServer == null || mLanguageClient == null) {
+            return null;
+        }
+        
+        return CompletableFuture.supplyAsync (() -> mLanguageServer.getCodeActionProvider ()
+                .codeActions (new CodeActionParams (
+                        getFile ().toPath (),
+                        getCursorRange (),
+                        diagnostics
+                )));
+    }
+    
+    /**
+     * Requests the language server to provided a semantically larger selection than the current selection.
+     * If a valid response is received, that range will be selected.
+     */
+    public void expandSelection () {
+        if (mLanguageServer == null || getFile () == null) {
+            LOG.error ("Cannot expand selection. Language server or file is null");
+            return;
+        }
+        
+        //noinspection deprecation
+        final var pd = ProgressDialog.show (getContext (), null, getContext ().getString (R.string.please_wait), true, false);
+        final CompletableFuture<Range> future = CompletableFuture.supplyAsync (() ->
+                mLanguageServer.getSelectionProvider ()
+                        .expandSelection (
+                                new ExpandSelectionParams (
+                                        getFile ().toPath (),
+                                        getCursorRange ()
+                                )
+                        )
+        );
+        
+        future.whenComplete (((range, throwable) -> {
+            
+            pd.dismiss ();
+            
+            if (throwable != null) {
+                LOG.error ("Error computing expanded selection range", throwable);
+                return;
+            }
+            
+            setSelection (range);
+        }));
+    }
+    
+    /**
+     * Get the cursor's position in the form of {@link Position}.
+     * @return The {@link Position} of the cursor.
+     */
+    public Position getCursorAsLSPPosition () {
+        return new Position (getCursor ().getLeftLine (), getCursor ().getLeftColumn ());
+    }
+    
+    /**
+     * Get the cursor's selection range in the form of {@link Range}.
+     * @return The {@link Range} of the cursor.
+     */
+    public Range getCursorRange () {
+        final var cursor = getCursor ();
+        final var start = new Position (cursor.getLeftLine (), cursor.getLeftColumn ());
+        final var end = new Position (cursor.getRightLine (), cursor.getRightColumn ());
+        return new Range (start, end);
+    }
+    
+    // FIXME This is temporary. Find another way to show diagnostic messages in editor.
+    private Layout getLayout () {
+        final var c = CodeEditor.class;
+        final Field f;
+        try {
+            f = c.getDeclaredField ("mLayout");
+            f.setAccessible (true);
+            return (Layout) f.get (this);
+        } catch (Throwable e) {
+            throw new RuntimeException (e);
+        }
+    }
+    
+    /**
+     * Notify the language server that the content of this file
+     * has been changed.
+     */
+    private void notifyContentChanged () {
+        
+        if (getFile () == null) {
+            return;
+        }
+        
+        StudioApp.getInstance ()
+                .getJavaLanguageServer ()
+                .getDocumentHandler ()
+                .onContentChange (
+                        new DocumentChangeEvent (
+                                getFile ().toPath (),
+                                getText (),
+                                mFileVersion + 1
+                        )
+                );
+    }
+    
+    private SignatureHelpWindow getSignatureHelpWindow () {
+        if (mSignatureHelpWindow == null) {
+            mSignatureHelpWindow = new SignatureHelpWindow (this);
+        }
+        
+        return mSignatureHelpWindow;
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/itsaky/androidide/views/editor/SignatureHelpWindow.java b/app/src/main/java/com/itsaky/androidide/views/editor/SignatureHelpWindow.java
new file mode 100644
index 000000000..62666c060
--- /dev/null
+++ b/app/src/main/java/com/itsaky/androidide/views/editor/SignatureHelpWindow.java
@@ -0,0 +1,165 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.views.editor;
+
+import android.graphics.Color;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.GradientDrawable;
+import android.text.SpannableStringBuilder;
+import android.text.style.BackgroundColorSpan;
+import android.text.style.ForegroundColorSpan;
+import android.util.TypedValue;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
+
+import com.blankj.utilcode.util.SizeUtils;
+import com.itsaky.androidide.R;
+import com.itsaky.lsp.models.SignatureHelp;
+import com.itsaky.lsp.models.SignatureInformation;
+
+import io.github.rosemoe.sora.widget.CodeEditor;
+import io.github.rosemoe.sora.widget.base.EditorPopupWindow;
+
+/**
+ * An {@link EditorPopupWindow} used to show signature help.
+ * @author Akash Yadav
+ */
+public class SignatureHelpWindow extends EditorPopupWindow {
+    
+    private final TextView text;
+    
+    /**
+     * Create a signature help popup window for editor
+     *
+     * @param editor The editor.
+     */
+    public SignatureHelpWindow (@NonNull CodeEditor editor) {
+        super (editor, getFeatureFlags ());
+        
+        final var context = editor.getContext ();
+        final var dp8 = SizeUtils.dp2px (8);
+        final var dp4 = SizeUtils.dp2px (4);
+        
+        this.text = new TextView (context);
+        this.text.setBackground (createBackground ());
+        this.text.setTextColor (ContextCompat.getColor (context, R.color.primaryTextColor));
+        this.text.setTextSize (TypedValue.COMPLEX_UNIT_SP, 14);
+        this.text.setClickable (false);
+        this.text.setFocusable (false);
+        this.text.setPaddingRelative (dp8, dp4, dp8, dp4);
+        
+        setContentView (this.text);
+    }
+    
+    private Drawable createBackground () {
+        GradientDrawable background = new GradientDrawable ();
+        background.setShape (GradientDrawable.RECTANGLE);
+        background.setColor (0xff212121);
+        background.setStroke (1, 0xffffffff);
+        background.setCornerRadius (8);
+        return background;
+    }
+    
+    public void setSignatureHelp (SignatureHelp signature) {
+        if (signature == null || signature.getSignatures ().isEmpty ()) {
+            if (isShowing ()) {
+                dismiss ();
+            }
+            
+            return;
+        }
+    
+        final var signatureText = createSignatureText (signature);
+        
+        if (signatureText == null) {
+            return;
+        }
+        
+        this.text.setText (signatureText);
+    }
+    
+    private CharSequence createSignatureText (SignatureHelp signature) {
+        final var signatures = signature.getSignatures ();
+        final var activeSignature = signature.getActiveSignature ();
+        final var activeParameter = signature.getActiveParameter ();
+        final SpannableStringBuilder sb = new SpannableStringBuilder ();
+        
+        if (activeSignature < 0 || activeParameter < 0) {
+            return null;
+        }
+        
+        if (activeSignature >= signatures.size ()) {
+            return null;
+        }
+        
+        // remove all with non-applicable signatures
+        signatures.removeIf (info -> info.getParameters ().size () >= activeParameter);
+        
+        for (var i = 0; i<signatures.size (); i++) {
+            final var info = signatures.get (i);
+            sb.append (formatSignature (info, activeParameter, i == activeSignature));
+            sb.append ('\n');
+    
+        }
+        
+        return sb;
+    }
+    
+    private static int getFeatureFlags () {
+        return FEATURE_SCROLL_AS_CONTENT | FEATURE_HIDE_WHEN_FAST_SCROLL;
+    }
+    
+    /**
+     * Formats (highlights) a method signature
+     *  @param signature Signature information
+     * @param paramIndex Currently active parameter index
+     * @param isCurrentSignature <code>true</code> if the given signature is the active signature.
+     */
+    @NonNull
+    private CharSequence formatSignature (@NonNull SignatureInformation signature, int paramIndex, boolean isCurrentSignature) {
+        String name = signature.getLabel();
+        name = name.substring(0, name.indexOf("("));
+        
+        SpannableStringBuilder sb = new SpannableStringBuilder();
+        sb.append(name, new ForegroundColorSpan (0xffffffff), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+        sb.append("(", new ForegroundColorSpan(0xff4fc3f7), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+        
+        var params = signature.getParameters();
+        for(int i=0;i<params.size();i++) {
+            int color = i == paramIndex ? 0xffff6060 : 0xffffffff;
+            final var info = params.get(i);
+            if(i == params.size() - 1) {
+                sb.append(info.getLabel() + "", new ForegroundColorSpan(color), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+            } else {
+                sb.append(info.getLabel() + "", new ForegroundColorSpan(color), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+                sb.append(",", new ForegroundColorSpan(0xff4fc3f7), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+                sb.append(" ");
+            }
+        }
+        sb.append(")", new ForegroundColorSpan(0xff4fc3f7), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+        
+        if (isCurrentSignature) {
+            sb.setSpan (new BackgroundColorSpan (Color.parseColor ("#e0e0e0")), 0, sb.length (), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
+        }
+        
+        return sb;
+    }
+    
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/annotations/Experimental.java b/app/src/main/java/io/github/rosemoe/editor/annotations/Experimental.java
deleted file mode 100755
index 055f16c70..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/annotations/Experimental.java
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.annotations;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * This annotation marks those fields, methods and constructors experimentally created.
- * <p>
- * Methods, fields and constructors with this annotation is very subject to keep or delete.
- * For that reason, they are not stable for production use.
- */
-@Target({ElementType.FIELD, ElementType.CONSTRUCTOR, ElementType.METHOD})
-@Retention(RetentionPolicy.SOURCE)
-public @interface Experimental {
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/interfaces/AutoCompleteProvider.java b/app/src/main/java/io/github/rosemoe/editor/interfaces/AutoCompleteProvider.java
deleted file mode 100755
index c8001e86c..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/interfaces/AutoCompleteProvider.java
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.interfaces;
-
-import com.itsaky.lsp.models.CompletionItem;
-
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-
-import java.util.List;
-
-/**
- * Interface for auto completion analysis
- *
- * @author Rose
- */
-public interface AutoCompleteProvider {
-    
-    /**
-     * Analyze auto complete items
-     *
-     *
-     * @param content
-     * @param prefix        The prefix of input to match
-     * @param isInCodeBlock Whether auto complete position is in code block
-     * @param colors        Last analyze result
-     * @param line          The line of cursor
-     * @return Analyzed items
-     */
-    List<CompletionItem> getAutoCompleteItems(Content content, String fileUri, String prefix, boolean isInCodeBlock, TextAnalyzeResult colors, int index, int line, int column) throws Exception;
-
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/interfaces/CodeAnalyzer.java b/app/src/main/java/io/github/rosemoe/editor/interfaces/CodeAnalyzer.java
deleted file mode 100755
index c7573d96f..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/interfaces/CodeAnalyzer.java
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.interfaces;
-
-import androidx.annotation.Nullable;
-
-import com.itsaky.lsp.api.ILanguageServer;
-import com.itsaky.lsp.models.DiagnosticItem;
-
-import java.io.File;
-import java.util.List;
-
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
-
-/**
- * Interface for analyzing highlight
- *
- * @author Rose
- */
-public interface CodeAnalyzer {
-    /**
-     * Find the diagnostic containing the specific position
-     *
-     * @param line The line to find
-     * @param column The column to find
-     * @return The found {@link DiagnosticItem} or {@code null}
-     */
-    DiagnosticItem findDiagnosticContaining(int line, int column);
-    
-    /**
-     * Find all diagnostics at the specified line
-     *
-     * @param line The line to find
-     * @return A list containing all diagnostics at the line. Should never be null.
-     */
-    List<DiagnosticItem> findDiagnosticsContainingLine(int line);
-    
-    /**
-     * Analyze spans for the given input
-     *
-     * @param languageServer The language server provided by this language. Maybe null.
-     * @param file The file opened in the editor
-     * @param content  The input text
-     * @param colors   Result dest
-     * @param delegate Delegate between thread and analyzer
-     * @throws Exception
-     *
-     * @see TextAnalyzer#analyze(Content)
-     * @see TextAnalyzer.AnalyzeThread.Delegate#shouldAnalyze()
-     */
-    void analyze(@Nullable ILanguageServer languageServer, @Nullable File file, Content content, TextAnalyzeResult colors, TextAnalyzer.AnalyzeThread.Delegate delegate) throws Exception;
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/interfaces/EditorEventListener.java b/app/src/main/java/io/github/rosemoe/editor/interfaces/EditorEventListener.java
deleted file mode 100755
index cdc7cb8fe..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/interfaces/EditorEventListener.java
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.interfaces;
-
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.widget.CodeEditor;
-
-/**
- * Listener for editor
- *
- * @author Rose
- */
-public interface EditorEventListener {
-
-    /**
-     * Before format
-     *
-     * @return true if you want to cancel this operation
-     */
-    boolean onRequestFormat(CodeEditor editor, boolean async);
-
-    /**
-     * Format failed
-     *
-     * @return true if you do not want editor to handle this exception
-     */
-    boolean onFormatFail(CodeEditor editor, Throwable cause);
-
-    /**
-     * Format succeeded
-     */
-    void onFormatSucceed(CodeEditor editor);
-
-    /**
-     * CodeEditor's setText is called
-     */
-    void onNewTextSet(CodeEditor editor);
-
-    /**
-     * @see io.github.rosemoe.editor.text.ContentListener#afterDelete(Content, int, int, int, int, CharSequence)
-     * Note:do not change content at this time
-     */
-    void afterDelete(CodeEditor editor, CharSequence content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent);
-
-    /**
-     * @see io.github.rosemoe.editor.text.ContentListener#afterInsert(Content, int, int, int, int, CharSequence)
-     * Note:do not change content at this time
-     */
-    void afterInsert(CodeEditor editor, CharSequence content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent);
-
-    /**
-     * @see io.github.rosemoe.editor.text.ContentListener#beforeReplace(Content)
-     * Note:do not change content at this time
-     */
-    void beforeReplace(CodeEditor editor, CharSequence content);
-    
-    void onSetSelection(int startLine, int startCol, int endLine, int endCol);
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/interfaces/EditorLanguage.java b/app/src/main/java/io/github/rosemoe/editor/interfaces/EditorLanguage.java
deleted file mode 100755
index e7b6728a7..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/interfaces/EditorLanguage.java
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.interfaces;
-
-import java.io.File;
-
-import io.github.rosemoe.editor.widget.SymbolPairMatch;
-
-/**
- * Language for editor
- * <p>
- * A Language helps editor to highlight text and provide auto-completion.
- * Implement this interface when you want to add new language support for editor.
- * <p>
- * <strong>NOTE:</strong> A language must not be single instance.
- * One language instance should always serves for only one editor.
- * It means that you should not give a language object to other editor instances
- * after it has been applied to one editor.
- * This is to provide better connection between auto completion provider and code analyzer.
- *
- * @author Rose
- */
-public interface EditorLanguage {
-    
-    /**
-     * Get CodeAnalyzer of this language object
-     *
-     * @return CodeAnalyzer
-     */
-    CodeAnalyzer getAnalyzer();
-
-    /**
-     * Get AutoCompleteProvider of this language object
-     *
-     * @return AutoCompleteProvider
-     */
-    AutoCompleteProvider getAutoCompleteProvider();
-
-    /**
-     * Called by editor to check whether this is a character for auto completion
-     *
-     * @param ch Character to check
-     * @return Whether is character for auto completion
-     */
-    boolean isAutoCompleteChar(char ch);
-    
-    /**
-     * Get advance for indent
-     *
-     * @param content Content of a line if 
-     * @return Advance space count
-     */
-    int getIndentAdvance(String content);
-
-    /**
-     * Whether use tab to format
-     *
-     * @return Whether use tab
-     */
-    boolean useTab();
-
-    /**
-     * Format the given content
-     *
-     * @param text Content to format
-     * @return Formatted code
-     */
-    CharSequence format(CharSequence text);
-
-    /**
-     * Returns language specified symbol pairs.
-     * The method is called only once when the language is applied.
-     */
-    SymbolPairMatch getSymbolPairs();
-
-    /**
-     * Get newline handlers of this language.
-     * This method is called each time the user presses ENTER key.
-     * <p>
-     * Pay attention to the performance as this method is called frequently
-     *
-     * @return NewlineHandlers , maybe null
-     */
-    NewlineHandler[] getNewlineHandlers();
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/interfaces/NewlineHandler.java b/app/src/main/java/io/github/rosemoe/editor/interfaces/NewlineHandler.java
deleted file mode 100755
index f950b9556..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/interfaces/NewlineHandler.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.interfaces;
-import io.github.rosemoe.editor.text.CharPosition;
-
-/**
- * Perform text processing when user enters '\n' and selection size is 0
- */
-public interface NewlineHandler {
-
-    /**
-     * Checks whether the given input matches the requirement to invoke this handler
-     *
-     * @param beforeText Text of line before cursor
-     * @param afterText  Text of line after cursor
-     * @return Whether this handler should be called
-     */
-    boolean matchesRequirement(String beforeText, String afterText, CharPosition cursor);
-
-    /**
-     * Handle newline and return processed content to insert
-     *
-     * @param beforeText Text of line before cursor
-     * @param afterText  Text of line after cursor
-     * @return Actual content to insert
-     */
-    HandleResult handleNewline(String beforeText, String afterText, int tabSize);
-
-    class HandleResult {
-
-        /**
-         * Text to insert
-         */
-        public final CharSequence text;
-
-        /**
-         * Count to shift left from the end of {@link HandleResult#text}
-         */
-        public final int shiftLeft;
-
-        public HandleResult(CharSequence text, int shiftLeft) {
-            this.text = text;
-            this.shiftLeft = shiftLeft;
-            if (shiftLeft < 0 || shiftLeft > text.length()) {
-                throw new IllegalArgumentException("invalid shiftLeft");
-            }
-        }
-
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/langs/AbstractCodeAnalyzer.java b/app/src/main/java/io/github/rosemoe/editor/langs/AbstractCodeAnalyzer.java
deleted file mode 100755
index d33ab9d21..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/langs/AbstractCodeAnalyzer.java
+++ /dev/null
@@ -1,68 +0,0 @@
-package io.github.rosemoe.editor.langs;
-
-import android.graphics.Color;
-
-import androidx.annotation.NonNull;
-
-import com.itsaky.lsp.models.DiagnosticItem;
-
-import org.antlr.v4.runtime.Token;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.regex.Pattern;
-
-import io.github.rosemoe.editor.interfaces.CodeAnalyzer;
-import io.github.rosemoe.editor.struct.Span;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-
-public abstract class AbstractCodeAnalyzer implements CodeAnalyzer {
-    
-    @Override
-    public DiagnosticItem findDiagnosticContaining(int line, int column) {
-        return null;
-    }
-
-    @Override
-    public List<DiagnosticItem> findDiagnosticsContainingLine(int line) {
-        return new ArrayList<>();
-    }
-    
-    protected void checkAndAddHexString (@NonNull Token token, final int defaultColorId, TextAnalyzeResult result) {
-        final var line = token.getLine () - 1;
-        final var column = token.getCharPositionInLine ();
-        final var m = HEX.matcher (token.getText ());
-        if (m.find ()) {
-            try {
-                // If the text is: '"#f44336"'
-                // Then then the inverted commas will have a separate span and the string value will have a separate span
-                
-                // Highlight opening '"'
-                final var first = result.addIfNeeded (line, column, defaultColorId);
-                first.underlineHeight = 0f;
-                first.underlineColor = 0;
-                
-                // Highlight color value
-                final var span = first.copy ();
-                span.column += 1;
-                span.underlineColor = Color.parseColor (token.getText ().substring (m.start (), m.end ()));
-                span.underlineHeight = Span.HEX_COLOR_UNDERLINE_HEIGHT;
-                result.add (span.line, span);
-                
-                // Highlight closing '"'
-                final var second = first.copy ();
-                second.column += token.getText ().length () - 1;
-                second.underlineColor = 0;
-                second.underlineHeight = 0f;
-                result.add (second.line, second);
-                
-            } catch (Throwable th) {
-                result.addIfNeeded (line, column, defaultColorId);
-            }
-        } else {
-            result.addIfNeeded (line, column, defaultColorId);
-        }
-    }
-    
-    private final Pattern HEX = Pattern.compile ("#[a-fA-F0-9]{3,8}");
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/langs/EmptyLanguage.java b/app/src/main/java/io/github/rosemoe/editor/langs/EmptyLanguage.java
deleted file mode 100755
index 8721ae425..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/langs/EmptyLanguage.java
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.langs;
-
-import com.itsaky.lsp.api.ILanguageServer;
-import com.itsaky.lsp.models.CompletionItem;
-
-import java.io.File;
-import java.util.ArrayList;
-import java.util.List;
-
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.interfaces.CodeAnalyzer;
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
-import io.github.rosemoe.editor.interfaces.NewlineHandler;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
-import io.github.rosemoe.editor.widget.SymbolPairMatch;
-
-/**
- * Empty language without any effect
- *
- * @author Rose
- */
-public class EmptyLanguage implements EditorLanguage {
-    
-    @Override
-    public CharSequence format(CharSequence text) {
-        return text;
-    }
-
-    @Override
-    public SymbolPairMatch getSymbolPairs() {
-        return new SymbolPairMatch.DefaultSymbolPairs();
-    }
-
-    @Override
-    public NewlineHandler[] getNewlineHandlers() {
-        return new NewlineHandler[0];
-    }
-
-
-    @Override
-    public CodeAnalyzer getAnalyzer() {
-        return new EmptyCodeAnalyzer();
-    }
-
-    @Override
-    public AutoCompleteProvider getAutoCompleteProvider() {
-        return new EmptyAutoCompleteProvider();
-    }
-
-    @Override
-    public boolean isAutoCompleteChar(char ch) {
-        return false;
-    }
-
-    @Override
-    public int getIndentAdvance(String content) {
-        return 0;
-    }
-
-    @Override
-    public boolean useTab() {
-        return false;
-    }
-
-    public static class EmptyAutoCompleteProvider implements AutoCompleteProvider {
-
-        @Override
-        public List<CompletionItem> getAutoCompleteItems(Content content, String fileUri, String prefix, boolean isInCodeBlock, TextAnalyzeResult colors, int index, int line, int column) {
-            return new ArrayList<> ();
-        }
-
-    }
-
-    private static class EmptyCodeAnalyzer extends io.github.rosemoe.editor.langs.AbstractCodeAnalyzer {
-
-        @Override
-        public void analyze(ILanguageServer server, File file, Content content, TextAnalyzeResult colors, TextAnalyzer.AnalyzeThread.Delegate delegate) {
-            colors.addNormalIfNull();
-        }
-    }
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/struct/BlockLine.java b/app/src/main/java/io/github/rosemoe/editor/struct/BlockLine.java
deleted file mode 100755
index 418707607..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/struct/BlockLine.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.struct;
-
-/**
- * Code block info model
- *
- * @author Rose
- */
-public class BlockLine {
-
-    /**
-     * Start line of code block
-     */
-    public int startLine;
-
-    /**
-     * Start column of code block
-     */
-    public int startColumn;
-
-    /**
-     * End line of code block
-     */
-    public int endLine;
-
-    /**
-     * End column of code block
-     */
-    public int endColumn;
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/struct/NavigationItem.java b/app/src/main/java/io/github/rosemoe/editor/struct/NavigationItem.java
deleted file mode 100755
index 97715eedb..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/struct/NavigationItem.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.struct;
-
-/**
- * Model for code navigation
- *
- * @author Rose
- */
-@SuppressWarnings("CanBeFinal")
-public class NavigationItem {
-
-    /**
-     * The line position
-     */
-    public int line;
-
-    /**
-     * The description
-     */
-    public String label;
-
-    /**
-     * Create a new navigation
-     *
-     * @param line  The line position
-     * @param label The description
-     */
-    public NavigationItem(int line, String label) {
-        this.line = line;
-        this.label = label;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/struct/Span.java b/app/src/main/java/io/github/rosemoe/editor/struct/Span.java
deleted file mode 100755
index c1793ed91..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/struct/Span.java
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.struct;
-
-import androidx.annotation.NonNull;
-
-import java.util.Collection;
-import java.util.concurrent.ArrayBlockingQueue;
-import java.util.concurrent.BlockingQueue;
-
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
-
-/**
- * The span model
- *
- * @author Rose
- */
-public class Span {
-    
-    private static final BlockingQueue<Span> cacheQueue = new ArrayBlockingQueue<> (8192 * 2);
-    public int line;
-    public int column;
-    public int colorId;
-    public int underlineColor = 0;
-    public float underlineHeight;
-    
-    @NonNull
-    @Override
-    public String toString () {
-        return "Span{" +
-                "line=" + line +
-                ", column=" + column +
-                ", colorId=" + colorId +
-                ", underlineColor=" + underlineColor +
-                ", underlineHeight=" + underlineHeight +
-                '}';
-    }
-    
-    public static final float DEFAULT_UNDERLINE_HEIGHT = 0.1f;
-    public static final float HEX_COLOR_UNDERLINE_HEIGHT = 0.27f;
-    
-    /**
-     * Create a new span
-     *
-     * @param line    Start line of span
-     * @param column  Start column of span
-     * @param colorId Type of span
-     * @see Span#obtain(int, int)
-     */
-    private Span (int line, int column, int colorId) {
-        this.line = line;
-        this.column = column;
-        this.colorId = colorId;
-        this.underlineColor = 0;
-        this.underlineHeight = DEFAULT_UNDERLINE_HEIGHT;
-    }
-    
-    public static Span obtain (int line, int column, int colorId) {
-        Span span = cacheQueue.poll ();
-        if (span == null) {
-            return new Span (line, column, colorId);
-        } else {
-            span.line = line;
-            span.column = column;
-            span.colorId = colorId;
-            return span;
-        }
-    }
-    
-    public static void recycleAll (Collection<Span> spans) {
-        for (Span span : spans) {
-            if (!span.recycle ()) {
-                return;
-            }
-        }
-    }
-    
-    /**
-     * Set a underline for this region
-     * Zero for no underline
-     *
-     * @param color Color for this underline (not color id of {@link EditorColorScheme})
-     * @return Self
-     */
-    public Span setUnderlineColor (int color) {
-        underlineColor = color;
-        return this;
-    }
-    
-    /**
-     * Set the height of the underline of this span
-     *
-     * @param height The new height of the span's underline
-     */
-    public void setUnderlineHeight (float height) {
-        this.underlineHeight = height;
-    }
-    
-    /**
-     * Get span start column
-     *
-     * @return Start column
-     */
-    public int getColumn () {
-        return column;
-    }
-    
-    /**
-     * Set column of this span
-     */
-    public Span setColumn (int column) {
-        this.column = column;
-        return this;
-    }
-    
-    /**
-     * Make a copy of this span
-     */
-    public Span copy () {
-        Span copy = obtain (line, column, colorId);
-        copy.setUnderlineColor (underlineColor);
-        return copy;
-    }
-    
-    public boolean recycle () {
-        colorId = column = underlineColor = 0;
-        return cacheQueue.offer (this);
-    }
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/Content.java b/app/src/main/java/io/github/rosemoe/editor/text/Content.java
deleted file mode 100755
index a4ec0be26..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/Content.java
+++ /dev/null
@@ -1,836 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-import com.itsaky.androidide.utils.Symbols;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import io.github.rosemoe.editor.annotations.Experimental;
-import io.github.rosemoe.editor.widget.CodeEditor;
-import io.github.rosemoe.struct.BlockLinkedList;
-
-/**
- * This class saves the text content for editor and maintains line widths
- *
- * @author Rose
- */
-public class Content implements CharSequence {
-    
-    public final static int DEFAULT_MAX_UNDO_STACK_SIZE = 100;
-    public final static int DEFAULT_LIST_CAPACITY = 1000;
-    
-    private static int sInitialListCapacity;
-    
-    static {
-        setInitialLineCapacity (DEFAULT_LIST_CAPACITY);
-    }
-    
-    private final List<ContentLine> mLines;
-    private final List<ContentListener> mListeners;
-    private final UndoManager mUndoManager;
-    private Indexer mIndexer;
-    private int mTextLength;
-    private int mNestedBatchEdit;
-    private Cursor mCursor;
-    private LineRemoveListener mLineListener;
-    
-    private final CodeEditor editor;
-    
-    /**
-     * Use a BlockLinkedList instead of ArrayList.
-     * <p>
-     * This can be faster while inserting in large text.
-     * But in other conditions, it is quite slow.
-     * <p>
-     * Disabled by default.
-     */
-    @Experimental
-    public static boolean useBlock = false;
-    
-    /**
-     * This constructor will create a Content object with no text
-     */
-    public Content (CodeEditor editor) {
-        this (editor, null);
-    }
-    
-    /**
-     * This constructor will create a Content object with the given source
-     * If you give us null,it will just create a empty Content object
-     *
-     * @param src The source of Content
-     */
-    public Content (CodeEditor editor, CharSequence src) {
-        if (src == null) {
-            src = "";
-        }
-        this.editor = editor;
-        mTextLength = 0;
-        mNestedBatchEdit = 0;
-        if (!useBlock) {
-            mLines = new ArrayList<> (getInitialLineCapacity ());
-        } else {
-            mLines = new BlockLinkedList<> (5000);
-        }
-        mLines.add (new ContentLine ());
-        mListeners = new ArrayList<> ();
-        mUndoManager = new UndoManager (this);
-        setMaxUndoStackSize (Content.DEFAULT_MAX_UNDO_STACK_SIZE);
-        mIndexer = new NoCacheIndexer (this);
-        if (src.length () == 0) {
-            setUndoEnabled (true);
-            return;
-        }
-        setUndoEnabled (false);
-        insert (0, 0, src);
-        setUndoEnabled (true);
-    }
-    
-    /**
-     * Returns the default capacity of text line list
-     *
-     * @return Default capacity
-     */
-    public static int getInitialLineCapacity () {
-        return Content.sInitialListCapacity;
-    }
-    
-    /**
-     * Set the default capacity of text line list
-     *
-     * @param capacity Default capacity
-     */
-    public static void setInitialLineCapacity (int capacity) {
-        if (capacity <= 0) {
-            throw new IllegalArgumentException ("capacity can not be negative or zero");
-        }
-        sInitialListCapacity = capacity;
-    }
-    
-    /**
-     * Test whether the two ContentLine have the same content
-     *
-     * @param a ContentLine
-     * @param b another ContentLine
-     * @return Whether equals in content
-     */
-    private static boolean equals (ContentLine a, ContentLine b) {
-        if (a.length () != b.length ()) {
-            return false;
-        }
-        for (int i = 0; i < a.length (); i++) {
-            if (a.charAt (i) != b.charAt (i)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    
-    @Override
-    public char charAt (int index) {
-        checkIndex (index);
-        CharPosition p = getIndexer ().getCharPosition (index);
-        return charAt (p.line, p.column);
-    }
-    
-    @Override
-    public int length () {
-        return mTextLength;
-    }
-    
-    @Override
-    public CharSequence subSequence (int start, int end) {
-        if (start > end) {
-            throw new StringIndexOutOfBoundsException ("start > end");
-        }
-        CharPosition s = getIndexer ().getCharPosition (start);
-        CharPosition e = getIndexer ().getCharPosition (end);
-        return subContent (s.getLine (), s.getColumn (), e.getLine (), e.getColumn ());
-    }
-    
-    /**
-     * Set a line listener
-     *
-     * @param lis the listener,maybe null
-     * @see LineRemoveListener
-     */
-    public void setLineListener (LineRemoveListener lis) {
-        this.mLineListener = lis;
-    }
-    
-    /**
-     * Get the character at the given position
-     * If (column == getColumnCount(line)),it returns '\n'
-     * IndexOutOfBoundsException is thrown
-     *
-     * @param line   The line position of character
-     * @param column The column position of character
-     * @return The character at the given position
-     */
-    public char charAt (int line, int column) {
-        if (!checkLineAndColumn (line, column, true)) {
-            return 0;
-        }
-        if (column == getColumnCount (line)) {
-            return '\n';
-        }
-        return mLines.get (line).charAt (column);
-    }
-    
-    /**
-     * Get raw data of line
-     * The result is not expected to be modified
-     *
-     * @param line Line
-     * @return Raw ContentLine used by Content
-     */
-    public ContentLine getLine (int line) {
-        return mLines.get (line);
-    }
-    
-    /**
-     * Get how many lines there are
-     *
-     * @return Line count
-     */
-    public int getLineCount () {
-        return mLines.size ();
-    }
-    
-    /**
-     * Get how many characters is on the given line
-     * If (line < 0 or line >= getLineCount()),it will throw a IndexOutOfBoundsException
-     *
-     * @param line The line to get
-     * @return Character count on line
-     */
-    public int getColumnCount (int line) {
-        checkLine (line);
-        return mLines.get (line).length ();
-    }
-    
-    /**
-     * Get the given line text without '\n' character
-     *
-     * @param line The line to get
-     * @return New String object of this line
-     */
-    public String getLineString (int line) {
-        checkLine (line);
-        return mLines.get (line).toString ();
-    }
-    
-    /**
-     * Get characters of line
-     */
-    public void getLineChars (int line, char[] dest) {
-        mLines.get (line).getChars (0, getColumnCount (line), dest, 0);
-    }
-    
-    /**
-     * Get the lines of this content.
-     * @return The content lines.
-     */
-    public List<ContentLine> getLines () {
-        return mLines;
-    }
-    
-    /**
-     * Transform the (line,column) position to index
-     * This task will usually completed by {@link Indexer}
-     *
-     * @param line   Line of index
-     * @param column Column on line of index
-     * @return Transformed index for the given arguments
-     */
-    public int getCharIndex (int line, int column) {
-        return getIndexer ().getCharIndex (line, column);
-    }
-    
-    /**
-     * Append text to the end of this content
-     *
-     * @param text Text to append
-     */
-    public int append (CharSequence text) {
-        if (getLineCount () <= 0) {
-            return 0;
-        }
-        final int line = getLineCount () - 1;
-        int col = getColumnCount (line);
-        if (col < 0) {
-            col = 0;
-        }
-        insert (line, col, text);
-        return line;
-    }
-    
-    /**
-     * Insert content to this object
-     *
-     * @param line   The insertion's line position
-     * @param column The insertion's column position
-     * @param text   The text you want to insert at the position
-     */
-    public void insert (int line, int column, CharSequence text) {
-        if (!checkLineAndColumn (line, column, true)) {
-            return;
-        }
-        if (text == null) {
-            return;
-        }
-        
-        text = text.toString ().replace ("\t", Symbols.createTabSpaces ());
-        //-----Notify------
-        if (mCursor != null) {
-            mCursor.beforeInsert (line, column);
-        }
-        
-        int workLine = line;
-        int workIndex = column;
-        if (workIndex == -1) {
-            workIndex = 0;
-        }
-        ContentLine currLine = mLines.get (workLine);
-        for (int i = 0; i < text.length (); i++) {
-            char c = text.charAt (i);
-            if (c == '\n') {
-                ContentLine newLine = new ContentLine ();
-                newLine.append (currLine, workIndex, currLine.length ());
-                currLine.delete (workIndex, currLine.length ());
-                mLines.add (workLine + 1, newLine);
-                currLine = newLine;
-                workIndex = 0;
-                workLine++;
-            } else {
-                currLine.insert (workIndex, c);
-                workIndex++;
-            }
-        }
-        mTextLength += text.length ();
-        this.dispatchAfterInsert (line, column, workLine, workIndex, text);
-    }
-    
-    /**
-     * Delete character in [start,end)
-     *
-     * @param start Start position in content
-     * @param end   End position in content
-     */
-    public void delete (int start, int end) {
-        checkIndex (start);
-        checkIndex (end);
-        CharPosition startPos = getIndexer ().getCharPosition (start);
-        CharPosition endPos = getIndexer ().getCharPosition (end);
-        if (start != end) {
-            delete (startPos.line, startPos.column, endPos.line, endPos.column);
-        }
-    }
-    
-    /**
-     * Delete text in the given region
-     *
-     * @param startLine         The start line position
-     * @param columnOnStartLine The start column position
-     * @param endLine           The end line position
-     * @param columnOnEndLine   The end column position
-     */
-    public void delete (int startLine, int columnOnStartLine, int endLine, int columnOnEndLine) {
-        StringBuilder changedContent = new StringBuilder ();
-        if (startLine == endLine) {
-            if (!checkLineAndColumn (endLine, columnOnEndLine, true)) {
-                return;
-            }
-            if (!checkLineAndColumn (startLine, columnOnStartLine == -1 ? 0 : columnOnStartLine, true)) {
-                return;
-            }
-            int beginIdx = columnOnStartLine;
-            if (columnOnStartLine == -1) {
-                beginIdx = 0;
-            }
-            if (beginIdx > columnOnEndLine) {
-                throw new IllegalArgumentException ("start > end");
-            }
-            ContentLine curr = mLines.get (startLine);
-            int len = curr.length ();
-            if (beginIdx < 0 || beginIdx > len || columnOnEndLine > len) {
-                throw new StringIndexOutOfBoundsException ("column start or column end is out of bounds");
-            }
-            
-            //-----Notify------
-            if (mCursor != null) {
-                if (columnOnStartLine != -1) {
-                    mCursor.beforeDelete (startLine, columnOnStartLine, endLine, columnOnEndLine);
-                } else {
-                    mCursor.beforeDelete (startLine == 0 ? 0 : startLine - 1, startLine == 0 ? 0 : getColumnCount (startLine - 1), endLine, columnOnEndLine);
-                }
-            }
-            
-            changedContent.append (curr, beginIdx, columnOnEndLine);
-            curr.delete (beginIdx, columnOnEndLine);
-            mTextLength -= columnOnEndLine - columnOnStartLine;
-            if (columnOnStartLine == -1) {
-                if (startLine == 0) {
-                    mTextLength++;
-                } else {
-                    ContentLine previous = mLines.get (startLine - 1);
-                    previous.append (curr);
-                    ContentLine rm = mLines.remove (startLine);
-                    if (mLineListener != null) {
-                        mLineListener.onRemove (this, rm);
-                    }
-                    changedContent.insert (0, '\n');
-                    startLine--;
-                    columnOnStartLine = getColumnCount (startLine);
-                }
-            }
-        } else if (startLine < endLine) {
-            if (!checkLineAndColumn (startLine, columnOnStartLine, true)) {
-                return;
-            }
-            if (!checkLineAndColumn (endLine, columnOnEndLine, true)) {
-                return;
-            }
-            
-            //-----Notify------
-            if (mCursor != null) {
-                mCursor.beforeDelete (startLine, columnOnStartLine, endLine, columnOnEndLine);
-            }
-            
-            for (int i = 0; i < endLine - startLine - 1; i++) {
-                ContentLine line = mLines.remove (startLine + 1);
-                if (mLineListener != null) {
-                    mLineListener.onRemove (this, line);
-                }
-                mTextLength -= line.length () + 1;
-                changedContent.append ('\n').append (line);
-            }
-            int currEnd = startLine + 1;
-            ContentLine start = mLines.get (startLine);
-            ContentLine end = mLines.get (currEnd);
-            mTextLength -= start.length () - columnOnStartLine;
-            changedContent.insert (0, start, columnOnStartLine, start.length ());
-            start.delete (columnOnStartLine, start.length ());
-            mTextLength -= columnOnEndLine;
-            changedContent.append ('\n').append (end, 0, columnOnEndLine);
-            end.delete (0, columnOnEndLine);
-            mTextLength--;
-            ContentLine r = mLines.remove (currEnd);
-            if (mLineListener != null) {
-                mLineListener.onRemove (this, r);
-            }
-            start.append (end);
-        } else {
-            throw new IllegalArgumentException ("start line > end line");
-        }
-        this.dispatchAfterDelete (startLine, columnOnStartLine, endLine, columnOnEndLine, changedContent);
-    }
-    
-    /**
-     * Replace the text in the given region
-     * This action will completed by calling {@link Content#delete(int, int, int, int)} and {@link Content#insert(int, int, CharSequence)}
-     *
-     * @param startLine         The start line position
-     * @param columnOnStartLine The start column position
-     * @param endLine           The end line position
-     * @param columnOnEndLine   The end column position
-     * @param text              The text to replace old text
-     */
-    public void replace (int startLine, int columnOnStartLine, int endLine, int columnOnEndLine, CharSequence text) {
-        if (text == null) {
-            throw new IllegalArgumentException ("text can not be null");
-        }
-        this.dispatchBeforeReplace ();
-        delete (startLine, columnOnStartLine, endLine, columnOnEndLine);
-        insert (startLine, columnOnStartLine, text);
-    }
-    
-    /**
-     * When you are going to use {@link CharSequence#charAt(int)} frequently,you are required to call
-     * this method.Because the way Content save text,it is usually slow to transform index to
-     * (line,column) from the start of text when the text is big.
-     * By calling this method,you will be able to get faster because calling this will
-     * cause the ITextContent object use a Indexer with cache.
-     * The performance is highly improved while linearly getting characters.
-     *
-     * @param initialIndex The Indexer with cache will take it into this index to its cache
-     */
-    public void beginStreamCharGetting (int initialIndex) {
-        mIndexer = new CachedIndexer (this);
-        mIndexer.getCharPosition (initialIndex);
-    }
-    
-    /**
-     * When you finished calling {@link CharSequence#charAt(int)} frequently,you can call this method
-     * to free the Indexer with cache.
-     * This is not forced.
-     */
-    public void endStreamCharGetting () {
-        mIndexer = new NoCacheIndexer (this);
-    }
-    
-    /**
-     * Undo the last modification
-     * NOTE:When there are too much modification,old modification will be deleted from UndoManager
-     */
-    public void undo () {
-        mUndoManager.undo (this);
-    }
-    
-    /**
-     * Redo the last modification
-     */
-    public void redo () {
-        mUndoManager.redo (this);
-    }
-    
-    /**
-     * Whether we can undo
-     *
-     * @return Whether we can undo
-     */
-    public boolean canUndo () {
-        return mUndoManager.canUndo ();
-    }
-    
-    /**
-     * Whether we can redo
-     *
-     * @return Whether we can redo
-     */
-    public boolean canRedo () {
-        return mUndoManager.canRedo ();
-    }
-    
-    /**
-     * Get whether UndoManager is enabled
-     *
-     * @return Whether UndoManager is enabled
-     */
-    public boolean isUndoEnabled () {
-        return mUndoManager.isUndoEnabled ();
-    }
-    
-    /**
-     * Set whether enable the UndoManager.
-     * If false,any modification will not be taken down and previous modification that
-     * is already in UndoManager will be removed.Does not make changes to content.
-     *
-     * @param enabled New state for UndoManager
-     */
-    public void setUndoEnabled (boolean enabled) {
-        mUndoManager.setUndoEnabled (enabled);
-    }
-    
-    /**
-     * Get current max stack size of UndoManager
-     *
-     * @return current max stack size
-     */
-    public int getMaxUndoStackSize () {
-        return mUndoManager.getMaxUndoStackSize ();
-    }
-    
-    /**
-     * Set the max size of stack in UndoManager
-     *
-     * @param maxSize New max size
-     */
-    public void setMaxUndoStackSize (int maxSize) {
-        mUndoManager.setMaxUndoStackSize (maxSize);
-    }
-    
-    /**
-     * A delegate method.
-     * Notify the UndoManager to begin batch edit(enter a new layer).
-     * NOTE: batch edit in Android can be nested.
-     *
-     * @return Whether in batch edit
-     */
-    public boolean beginBatchEdit () {
-        mNestedBatchEdit++;
-        return isInBatchEdit ();
-    }
-    
-    /**
-     * A delegate method.
-     * Notify the UndoManager to end batch edit(exit current layer).
-     *
-     * @return Whether in batch edit
-     */
-    public boolean endBatchEdit () {
-        mNestedBatchEdit--;
-        if (mNestedBatchEdit < 0) {
-            mNestedBatchEdit = 0;
-        }
-        return isInBatchEdit ();
-    }
-    
-    /**
-     * Returns whether we are in batch edit
-     *
-     * @return Whether in batch edit
-     */
-    public boolean isInBatchEdit () {
-        return mNestedBatchEdit > 0;
-    }
-    
-    /**
-     * Add a new {@link ContentListener} to the Content
-     *
-     * @param listener The listener to add
-     */
-    public void addContentListener (ContentListener listener) {
-        if (listener == null) {
-            throw new IllegalArgumentException ("listener can not be null");
-        }
-        if (listener instanceof Indexer) {
-            throw new IllegalArgumentException ("Permission denied");
-        }
-        if (!mListeners.contains (listener)) {
-            mListeners.add (listener);
-        }
-    }
-    
-    /**
-     * Remove the given listener of this Content
-     *
-     * @param listener The listener to remove
-     */
-    public void removeContentListener (ContentListener listener) {
-        if (listener instanceof Indexer) {
-            throw new IllegalArgumentException ("Permission denied");
-        }
-        mListeners.remove (listener);
-    }
-    
-    /**
-     * Get the using {@link Indexer} object
-     *
-     * @return Indexer for this object
-     */
-    public Indexer getIndexer () {
-        if (mIndexer.getClass () != CachedIndexer.class && mCursor != null) {
-            return mCursor.getIndexer ();
-        }
-        return mIndexer;
-    }
-    
-    /**
-     * Quick method to get sub string of this object
-     *
-     * @param startLine   The start line position
-     * @param startColumn The start column position
-     * @param endLine     The end line position
-     * @param endColumn   The end column position
-     * @return sub sequence of this Content
-     */
-    public Content subContent (int startLine, int startColumn, int endLine, int endColumn) {
-        Content c = new Content (this.editor);
-        c.setUndoEnabled (false);
-        if (startLine == endLine) {
-            c.insert (0, 0, mLines.get (startLine).subSequence (startColumn, endColumn));
-        } else if (startLine < endLine) {
-            c.insert (0, 0, mLines.get (startLine).subSequence (startColumn, mLines.get (startLine).length ()));
-            for (int i = startLine + 1; i < endLine; i++) {
-                c.mLines.add (new ContentLine (mLines.get (i)));
-                c.mTextLength += mLines.get (i).length () + 1;
-            }
-            ContentLine end = mLines.get (endLine);
-            c.mLines.add (new ContentLine ().insert (0, end, 0, endColumn));
-            c.mTextLength += endColumn + 1;
-        } else {
-            throw new IllegalArgumentException ("start > end");
-        }
-        c.setUndoEnabled (true);
-        return c;
-    }
-    
-    @Override
-    public boolean equals (Object anotherObject) {
-        if (anotherObject instanceof Content) {
-            Content content = (Content) anotherObject;
-            if (content.getLineCount () != this.getLineCount ()) {
-                return false;
-            }
-            for (int i = 0; i < this.getLineCount (); i++) {
-                if (!equals (mLines.get (i), content.mLines.get (i))) {
-                    return false;
-                }
-            }
-            return true;
-        } else {
-            return false;
-        }
-    }
-    
-    @Override
-    public String toString () {
-        StringBuilder sb = new StringBuilder ();
-        boolean first = true;
-        for (ContentLine line : mLines) {
-            if (!first) {
-                sb.append ('\n');
-            } else {
-                first = false;
-            }
-            sb.append (line);
-        }
-        return sb.toString ();
-    }
-    
-    /**
-     * Get the text in StringBuilder form
-     * Used by TextColorProvider
-     * This can improve the speed in char getting for tokenizing
-     *
-     * @return StringBuilder form of Content
-     */
-    public StringBuilder toStringBuilder () {
-        StringBuilder sb = new StringBuilder ();
-        sb.ensureCapacity (mTextLength + 10);
-        boolean first = true;
-        final int lines = getLineCount ();
-        for (int i = 0; i < lines; i++) {
-            ContentLine line = mLines.get (i);
-            if (!first) {
-                sb.append ('\n');
-            } else {
-                first = false;
-            }
-            line.appendTo (sb);
-        }
-        return sb;
-    }
-    
-    /**
-     * Get Cursor for editor (Create if there is not)
-     *
-     * @return Cursor
-     */
-    public Cursor getCursor () {
-        if (mCursor == null) {
-            mCursor = new Cursor (this.editor, this);
-        }
-        return mCursor;
-    }
-    
-    /**
-     * Dispatch events to listener before replacement
-     */
-    private void dispatchBeforeReplace () {
-        mUndoManager.beforeReplace (this);
-        if (mCursor != null) {
-            mCursor.beforeReplace ();
-        }
-        if (mIndexer instanceof ContentListener) {
-            ((ContentListener) mIndexer).beforeReplace (this);
-        }
-        for (ContentListener lis : mListeners) {
-            lis.beforeReplace (this);
-        }
-    }
-    
-    /**
-     * Dispatch events to listener after deletion
-     *
-     * @param a Start line
-     * @param b Start Column
-     * @param c End line
-     * @param d End column
-     * @param e Text deleted
-     */
-    private void dispatchAfterDelete (int a, int b, int c, int d, CharSequence e) {
-        mUndoManager.afterDelete (this, a, b, c, d, e);
-        if (mCursor != null) {
-            mCursor.afterDelete (a, b, c, d, e);
-        }
-        if (mIndexer instanceof ContentListener) {
-            ((ContentListener) mIndexer).afterDelete (this, a, b, c, d, e);
-        }
-        for (ContentListener lis : mListeners) {
-            lis.afterDelete (this, a, b, c, d, e);
-        }
-    }
-    
-    /**
-     * Dispatch events to listener after insertion
-     *
-     * @param a Start line
-     * @param b Start Column
-     * @param c End line
-     * @param d End column
-     * @param e Text deleted
-     */
-    private void dispatchAfterInsert (int a, int b, int c, int d, CharSequence e) {
-        mUndoManager.afterInsert (this, a, b, c, d, e);
-        if (mCursor != null) {
-            mCursor.afterInsert (a, b, c, d, e);
-        }
-        if (mIndexer instanceof ContentListener) {
-            ((ContentListener) mIndexer).afterInsert (this, a, b, c, d, e);
-        }
-        for (ContentListener lis : mListeners) {
-            lis.afterInsert (this, a, b, c, d, e);
-        }
-    }
-    
-    /**
-     * Check whether the index is valid
-     *
-     * @param index Index to check
-     */
-    protected void checkIndex (int index) {
-        if (index > length ()) {
-            throw new StringIndexOutOfBoundsException ("Index " + index + " out of bounds. length:" + length ());
-        }
-    }
-    
-    public boolean isPositionValid (int line, int column) {
-        return checkLineAndColumn (line, column, true);
-    }
-    
-    /**
-     * Check whether the line is valid
-     *
-     * @param line Line to check
-     */
-    protected void checkLine (int line) {
-        if (line >= getLineCount ()) {
-            throw new StringIndexOutOfBoundsException ("Line " + line + " out of bounds. line count:" + getLineCount ());
-        }
-    }
-    
-    /**
-     * Check whether the line and column is valid
-     *
-     * @param line       The line to check
-     * @param column     The column to check
-     * @param allowEqual Whether allow (column == getColumnCount(line))
-     */
-    protected boolean checkLineAndColumn (int line, int column, boolean allowEqual) {
-        checkLine (line);
-        int len = mLines.get (line).length ();
-        if (column > len || (!allowEqual && column == len)) {
-            return false;
-        }
-        
-        return true;
-    }
-    
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/FontCache.java b/app/src/main/java/io/github/rosemoe/editor/text/FontCache.java
deleted file mode 100755
index 45e64d198..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/FontCache.java
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-import android.graphics.Paint;
-
-import java.util.Arrays;
-
-/**
- * Cache to measure text quickly
- * This is very useful when text is long
- * Use this to make editor 20x faster than before
- * It is not thread-safe
- *
- * @author Rose
- */
-public class FontCache {
-
-    private final float[] cache;
-
-    private final char[] buffer;
-
-    public FontCache() {
-        cache = new float[65536];
-        buffer = new char[3];
-    }
-
-    private static boolean isEmoji(char ch) {
-        return ch == 0xd83c || ch == 0xd83d || ch == 0xd83e;
-    }
-
-    /**
-     * Clear caches of font
-     */
-    public void clearCache() {
-        Arrays.fill(cache, 0);
-    }
-
-    /**
-     * Measure a single character
-     */
-    public float measureChar(char ch, Paint p) {
-        float width = cache[(int) ch];
-        if (width == 0) {
-            buffer[0] = ch;
-            width = p.measureText(buffer, 0, 1);
-            cache[(int) ch] = width;
-        }
-        return width;
-    }
-
-    /*
-     * Measure text
-     */
-    public float measureText(char[] chars, int start, int end, Paint p) {
-        float width = 0f;
-        for (int i = start; i < end; i++) {
-            char ch = chars[i];
-            if (isEmoji(ch) && i + 1 < end) {
-                buffer[0] = ch;
-                buffer[1] = chars[++i];
-                if( i + 1 < end ){
-                    buffer [2] = chars [++i];
-                    if( !isEmoji(buffer [1]) || isEmoji(buffer [2]) ){
-                        //当第2个字符不是Emoji或第3字符是Emoji时,只测量两个字符
-                        i--;
-                        width += p.measureText(buffer, 0, 2);
-                    }
-                    else{
-                        width += p.measureText(buffer, 0, 3);
-                    }
-                }
-                else{
-                    width += p.measureText(buffer, 0, 2);
-                }
-            } else {
-                width += measureChar(ch, p);
-            }
-        }
-        return width;
-    }
-
-    /**
-     * Measure text
-     */
-    public float measureText(CharSequence str, int start, int end, Paint p) {
-        float width = 0f;
-        for (int i = start; i < end; i++) {
-            char ch = str.charAt(i);
-            if (isEmoji(ch) && i + 1 < end) {
-                buffer[0] = ch;
-                buffer[1] = str.charAt(++i);
-                if( i + 1 < end ){
-                    buffer [2] = str.charAt(++i);
-                    if( !isEmoji(buffer [1]) || isEmoji(buffer [2]) ){
-                        //当第2个字符不是Emoji或第3字符是Emoji时,只测量两个字符
-                        buffer [2] = 0;
-                        i--;
-                        width += p.measureText(buffer, 0, 2);
-                    }
-                    else{
-                        width += p.measureText(buffer, 0, 3);
-                    }
-                }
-                else{
-                    width += p.measureText(buffer, 0, 2);
-                }
-            } else {
-                width += measureChar(ch, p);
-            }
-        }
-        return width;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/FormatThread.java b/app/src/main/java/io/github/rosemoe/editor/text/FormatThread.java
deleted file mode 100755
index 23e2c60d5..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/FormatThread.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
-
-public class FormatThread extends Thread {
-
-    private CharSequence mText;
-
-    private EditorLanguage mLanguage;
-
-    private FormatResultReceiver mReceiver;
-
-    public FormatThread(CharSequence text, EditorLanguage language, FormatResultReceiver receiver) {
-        mText = text;
-        mLanguage = language;
-        mReceiver = receiver;
-    }
-
-    @Override
-    public void run() {
-        CharSequence result = null;
-        try {
-            CharSequence chars = ((mText instanceof Content) ? (((Content) mText).toStringBuilder()) : new StringBuilder(mText));
-            result = mLanguage.format(chars);
-        } catch (Throwable e) {
-            if (mReceiver != null) {
-                mReceiver.onFormatFail(e);
-            }
-        }
-        if (mReceiver != null) {
-            mReceiver.onFormatSucceed(mText, result);
-        }
-        mReceiver = null;
-        mLanguage = null;
-        mText = null;
-    }
-
-    public interface FormatResultReceiver {
-
-        void onFormatSucceed(CharSequence originalText, CharSequence newText);
-
-        void onFormatFail(Throwable throwable);
-
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/Indexer.java b/app/src/main/java/io/github/rosemoe/editor/text/Indexer.java
deleted file mode 100755
index f74eabbc7..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/Indexer.java
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-/**
- * A helper class for ITextContent to transform (line,column) and index
- *
- * @author Rose
- */
-public interface Indexer {
-
-    /**
-     * Get the index of (line,column)
-     *
-     * @param line   The line position of index
-     * @param column The column position of index
-     * @return Calculated index
-     */
-    int getCharIndex(int line, int column);
-
-    /**
-     * Get the line position of index
-     *
-     * @param index The index you want to know its line
-     * @return Line position of index
-     */
-    int getCharLine(int index);
-
-    /**
-     * Get the column position of index
-     *
-     * @param index The index you want to know its column
-     * @return Column position of index
-     */
-    int getCharColumn(int index);
-
-    /**
-     * Get the CharPosition for the given index
-     * You are not expected to make changes with this CharPosition
-     *
-     * @param index The index you want to get
-     * @return The CharPosition object.
-     */
-    CharPosition getCharPosition(int index);
-
-    /**
-     * Get the CharPosition for the given (line,column)
-     * You are not expected to make changes with this CharPosition
-     *
-     * @param line   The line position you want to get
-     * @param column The column position you want to get
-     * @return The CharPosition object.
-     */
-    CharPosition getCharPosition(int line, int column);
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/LineRemoveListener.java b/app/src/main/java/io/github/rosemoe/editor/text/LineRemoveListener.java
deleted file mode 100755
index 27181afa6..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/LineRemoveListener.java
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-/**
- * A listener to know when a ContentLine object is removed from Content object
- *
- * @author Rose
- */
-public interface LineRemoveListener {
-
-    /**
-     * When a ContentLine is removed from Content, this method is called
-     *
-     * @param content Caller Content
-     * @param line    ContentLine object removed
-     */
-    void onRemove(Content content, ContentLine line);
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/NoCacheIndexer.java b/app/src/main/java/io/github/rosemoe/editor/text/NoCacheIndexer.java
deleted file mode 100755
index f709bcf9c..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/NoCacheIndexer.java
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-/**
- * Indexer without cache
- *
- * @author Rose
- */
-public final class NoCacheIndexer extends CachedIndexer implements Indexer {
-
-    /**
-     * Create a indexer without cache
-     *
-     * @param content Target content
-     */
-    public NoCacheIndexer(Content content) {
-        super(content);
-        //Disable dynamic indexing
-        if (super.getMaxCacheSize() != 0) {
-            super.setMaxCacheSize(0);
-        }
-        if (super.isHandleEvent()) {
-            super.setHandleEvent(false);
-        }
-    }
-
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/ObjectAllocator.java b/app/src/main/java/io/github/rosemoe/editor/text/ObjectAllocator.java
deleted file mode 100755
index 7be3d09ae..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/ObjectAllocator.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-import java.util.List;
-
-import io.github.rosemoe.editor.struct.BlockLine;
-
-/**
- * A object provider for speed improvement
- * Now meaningless because it is not as well as it expected
- *
- * @author Rose
- */
-public class ObjectAllocator {
-
-    private static final int RECYCLE_LIMIT = 1024 * 8;
-    private static List<BlockLine> blockLines;
-
-    public static void recycleBlockLine(List<BlockLine> src) {
-        if (src == null) {
-            return;
-        }
-        if (blockLines == null) {
-            blockLines = src;
-            return;
-        }
-        int size = blockLines.size();
-        int sizeAnother = src.size();
-        while (sizeAnother > 0 && size < RECYCLE_LIMIT) {
-            size++;
-            sizeAnother--;
-            blockLines.add(src.get(sizeAnother));
-        }
-    }
-
-    public static BlockLine obtainBlockLine() {
-        return (blockLines == null || blockLines.isEmpty()) ? new BlockLine() : blockLines.remove(blockLines.size() - 1);
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzeResult.java b/app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzeResult.java
deleted file mode 100755
index bf3c0b165..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzeResult.java
+++ /dev/null
@@ -1,253 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-import com.itsaky.lsp.models.Range;
-
-import io.github.rosemoe.editor.struct.BlockLine;
-import io.github.rosemoe.editor.struct.NavigationItem;
-import io.github.rosemoe.editor.struct.Span;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * The result of analysis
- */
-public class TextAnalyzeResult {
-    
-    protected final List<BlockLine> mBlocks;
-    protected final List<List<Span>> mSpanMap;
-    
-    public Object mExtra;
-    protected List<NavigationItem> mLabels;
-    protected Span mLast;
-    protected int mSuppressSwitch = Integer.MAX_VALUE;
-    
-    private boolean determined = false;
-    
-    private final Map<Integer, List<Range>> stringMap = new HashMap<> ();
-    private final Map<Integer, List<Range>> commentMap = new HashMap<> ();
-    
-    /**
-     * Create a new result
-     */
-    public TextAnalyzeResult () {
-        mLast = null;
-        mSpanMap = new ArrayList<> (2048);
-        mBlocks = new ArrayList<> (1024);
-    }
-    
-    public Map<Integer, List<Range>> getStringMap () {
-        return stringMap;
-    }
-    
-    public Map<Integer, List<Range>> getCommentMap () {
-        return commentMap;
-    }
-    
-    public void addStringRange (int line, Range range) {
-        List<Range> ranges = stringMap.get (line);
-        if (ranges == null) {
-            ranges = new ArrayList<> ();
-        }
-        ranges.add (range);
-        stringMap.put (line, ranges);
-    }
-    
-    public void addCommentRange (int line, Range range) {
-        List<Range> ranges = commentMap.get (line);
-        if (ranges == null) {
-            ranges = new ArrayList<> ();
-        }
-        ranges.add (range);
-        commentMap.put (line, ranges);
-    }
-    
-    public Span addNormalSpanAt (int line, int column) {
-        final var span = add (line, Span.obtain (line, column, EditorColorScheme.TEXT_NORMAL));
-        span.underlineColor = 0;
-        return span;
-    }
-    
-    /**
-     * Add a new span if required (colorId is different from last)
-     *
-     * @param spanLine Line
-     * @param column   Column
-     * @param colorId  Type
-     * @return The span that was added
-     */
-    public Span addIfNeeded (int spanLine, int column, int colorId) {
-        if (mLast != null && mLast.colorId == colorId) {
-            return mLast;
-        }
-        return add (spanLine, Span.obtain (spanLine, column, colorId));
-    }
-    
-    /**
-     * Add a span directly
-     * Note: the line should always >= the line of span last committed
-     * if two spans are on the same line, you must add them in order by their column
-     *
-     * @param spanLine The line position of span
-     * @param span     The span
-     * @return The span that was added
-     */
-    public Span add (int spanLine, Span span) {
-        int mapLine = mSpanMap.size () - 1;
-        if (spanLine == mapLine) {
-            mSpanMap.get (spanLine).add (span);
-        } else if (spanLine > mapLine) {
-            Span extendedSpan = mLast;
-            if (extendedSpan == null) {
-                extendedSpan = Span.obtain (spanLine, 0, EditorColorScheme.TEXT_NORMAL);
-            }
-            while (mapLine < spanLine) {
-                List<Span> lineSpans = new ArrayList<> ();
-                lineSpans.add (extendedSpan.copy ().setColumn (0));
-                mSpanMap.add (lineSpans);
-                mapLine++;
-            }
-            List<Span> lineSpans = mSpanMap.get (spanLine);
-            if (span.column == 0) {
-                lineSpans.clear ();
-            }
-            lineSpans.add (span);
-        } else {
-            throw new IllegalStateException ("Invalid position");
-        }
-        mLast = span;
-        return span;
-    }
-    
-    /**
-     * This method must be called when whole text is analyzed
-     *
-     * @param line The line is the line last of text
-     */
-    public void determine (int line) {
-        int mapLine = mSpanMap.size () - 1;
-        Span extendedSpan = mLast;
-        if (mLast == null) {
-            extendedSpan = Span.obtain (line, 0, EditorColorScheme.TEXT_NORMAL);
-        }
-        while (mapLine < line) {
-            List<Span> lineSpans = new ArrayList<> ();
-            lineSpans.add (extendedSpan.copy ().setColumn (0));
-            mSpanMap.add (lineSpans);
-            mapLine++;
-        }
-        determined = true;
-    }
-    
-    /**
-     * Get a new BlockLine object
-     * <strong>It fields maybe not initialized with zero</strong>
-     *
-     * @return An idle BlockLine
-     */
-    public BlockLine obtainNewBlock () {
-        return ObjectAllocator.obtainBlockLine ();
-    }
-    
-    /**
-     * Add a new code block info
-     *
-     * @param block Info of code block
-     */
-    public void addBlockLine (BlockLine block) {
-        mBlocks.add (block);
-    }
-    
-    /**
-     * Get list of code blocks
-     *
-     * @return code blocks
-     */
-    public List<BlockLine> getBlocks () {
-        return mBlocks;
-    }
-    
-    /**
-     * Ensure the list not empty
-     */
-    public void addNormalIfNull () {
-        if (mSpanMap.isEmpty ()) {
-            List<Span> spanList = new ArrayList<> ();
-            spanList.add (Span.obtain (0, 0, EditorColorScheme.TEXT_NORMAL));
-            mSpanMap.add (spanList);
-        }
-    }
-    
-    /**
-     * Get code navigation list
-     *
-     * @return Current navigation list
-     */
-    public List<NavigationItem> getNavigation () {
-        return mLabels;
-    }
-    
-    /**
-     * Set code navigation list
-     *
-     * @param navigation New navigation list
-     */
-    public void setNavigation (List<NavigationItem> navigation) {
-        mLabels = navigation;
-    }
-    
-    /**
-     * Returns suppress switch
-     *
-     * @return suppress switch
-     * @see TextAnalyzeResult#setSuppressSwitch(int)
-     */
-    public int getSuppressSwitch () {
-        return mSuppressSwitch;
-    }
-    
-    /**
-     * Set suppress switch for editor
-     * What is 'suppress switch' ?:
-     * Suppress switch is a switch size for code block line drawing
-     * and for the process to find out which code block the cursor is in.
-     * Because the code blocks are not saved by the order of both start line and
-     * end line,we are unable to know exactly when we should stop the process.
-     * So without a suppress switch,it will cost a large of time to search code
-     * blocks.So I added this switch.
-     * A suppress switch is the code block count in the first layer code block
-     * (as well as its sub code blocks).
-     * If you are unsure,do not set it.
-     * The default value if Integer.MAX_VALUE
-     *
-     * @param suppressSwitch Suppress switch
-     */
-    public void setSuppressSwitch (int suppressSwitch) {
-        mSuppressSwitch = suppressSwitch;
-    }
-    
-    /**
-     * Get span map
-     */
-    public List<List<Span>> getSpanMap () {
-        return mSpanMap;
-    }
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzer.java b/app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzer.java
deleted file mode 100755
index e23620c60..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/text/TextAnalyzer.java
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.text;
-
-import com.itsaky.androidide.language.logs.LogLanguageImpl;
-import com.itsaky.androidide.utils.Logger;
-import com.itsaky.lsp.api.ILanguageServer;
-
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
-import io.github.rosemoe.editor.langs.EmptyLanguage;
-import io.github.rosemoe.editor.struct.BlockLine;
-import io.github.rosemoe.editor.struct.Span;
-
-import java.io.File;
-import java.util.List;
-
-/**
- * This is a manager of analyzing text
- *
- * @author Rose
- */
-public class TextAnalyzer {
-    
-    private static int sThreadId = 0;
-    private final RecycleObjContainer mObjContainer = new RecycleObjContainer ();
-    private final Object mLock = new Object ();
-    
-    public long mOpStartTime;
-    private TextAnalyzeResult mResult;
-    private Callback mCallback;
-    private AnalyzeThread mThread;
-    private final EditorLanguage mLanguage;
-    private final ILanguageServer mLanguageServer;
-    private File file;
-    
-    private static final Logger LOG = Logger.instance ("TextAnalyzer");
-    
-    /**
-     * Create a new manager for the given codeAnalyzer
-     *  @param language The language set to editor.
-     * @param mLanguageServer
-     * @param file
-     */
-    public TextAnalyzer (EditorLanguage language, ILanguageServer mLanguageServer, File file) {
-        this.mLanguageServer = mLanguageServer;
-        this.file = file;
-        if (language == null || language.getAnalyzer () == null) {
-            throw new IllegalArgumentException ();
-        }
-        mResult = new TextAnalyzeResult ();
-        mResult.addNormalIfNull ();
-        mLanguage = language;
-    }
-    
-    public void setFile (File file) {
-        this.file = file;
-    }
-    
-    private synchronized static int nextThreadId () {
-        sThreadId++;
-        return sThreadId;
-    }
-    
-    /**
-     * Set callback of analysis
-     *
-     * @param cb New callback
-     */
-    public void setCallback (Callback cb) {
-        mCallback = cb;
-    }
-    
-    /**
-     * Stop the text analyzer
-     */
-    public void shutdown () {
-        final AnalyzeThread thread = mThread;
-        if (thread != null && thread.isAlive ()) {
-            thread.interrupt ();
-            mThread = null;
-        }
-    }
-    
-    /**
-     * Called from painting process to recycle outdated objects for reusing
-     */
-    public void notifyRecycle () {
-        mObjContainer.recycle ();
-    }
-    
-    /**
-     * Analyze the given text
-     *
-     * @param origin The source text
-     */
-    public synchronized void analyze (Content origin) {
-        AnalyzeThread thread = this.mThread;
-        if (thread == null || !thread.isAlive ()) {
-            thread = this.mThread = new AnalyzeThread (mLanguage, mLock, origin);
-            thread.setName ("TextAnalyzeDaemon-" + nextThreadId ());
-            thread.setDaemon (true);
-            thread.start ();
-        } else {
-            thread.restartWith (origin);
-            synchronized (mLock) {
-                mLock.notify ();
-            }
-        }
-    }
-    
-    /**
-     * Get analysis result
-     *
-     * @return Result of analysis
-     */
-    public TextAnalyzeResult getResult () {
-        return mResult;
-    }
-    
-    /**
-     * Callback for text analyzing
-     *
-     * @author Rose
-     */
-    public interface Callback {
-        
-        /**
-         * Called when analyze result is available
-         * Count of calling this method is not always equal to the count you call {@link TextAnalyzer#analyze(Content)}
-         *
-         * @param analyzer Host TextAnalyzer
-         */
-        void onAnalyzeDone (TextAnalyzer analyzer);
-        
-    }
-    
-    /**
-     * Container for objects that is going to be recycled
-     *
-     * @author Rose
-     */
-    static class RecycleObjContainer {
-        
-        List<List<Span>> spanMap;
-        
-        List<BlockLine> blockLines;
-        
-        void recycle () {
-            ObjectAllocator.recycleBlockLine (blockLines);
-            SpanRecycler.getInstance ().recycle (spanMap);
-            clear ();
-        }
-        
-        void clear () {
-            spanMap = null;
-            blockLines = null;
-        }
-        
-    }
-    
-    /**
-     * AnalyzeThread to control
-     */
-    public class AnalyzeThread extends Thread {
-        
-        private final Object lock;
-        private volatile boolean waiting = false;
-        private Content content;
-        private final EditorLanguage language;
-        
-        /**
-         * Create a new thread
-         *
-         * @param a       The CodeAnalyzer to call
-         * @param content The Content to analyze
-         */
-        public AnalyzeThread (EditorLanguage lang, Object lock, Content content) {
-            this.language = lang;
-            this.lock = lock;
-            this.content = content;
-        }
-        
-        @Override
-        public void run () {
-            try {
-                do {
-                    TextAnalyzeResult colors = new TextAnalyzeResult ();
-                    Delegate d = new Delegate ();
-                    mOpStartTime = System.currentTimeMillis ();
-                    do {
-                        waiting = false;
-                        language.getAnalyzer ().analyze (mLanguageServer, file, content, colors, d);
-                        if (waiting) {
-                            colors.mSpanMap.clear ();
-                            colors.mLast = null;
-                            colors.mBlocks.clear ();
-                            colors.mSuppressSwitch = Integer.MAX_VALUE;
-                            colors.mLabels = null;
-                            colors.mExtra = null;
-                        }
-                    } while (waiting);
-                    
-                    mObjContainer.blockLines = mResult.mBlocks;
-                    mObjContainer.spanMap = mResult.mSpanMap;
-                    mResult = colors;
-                    colors.addNormalIfNull ();
-                    try {
-                        if (mCallback != null) {
-                            mCallback.onAnalyzeDone (TextAnalyzer.this);
-                        }
-                    } catch (NullPointerException e) {
-                        e.printStackTrace ();
-                    }
-                    
-                    try {
-                        synchronized (lock) {
-                            lock.wait ();
-                        }
-                    } catch (InterruptedException e) {
-                        break;
-                    }
-                } while (true);
-            } catch (Exception ex) {
-                if (!(language instanceof EmptyLanguage || language instanceof LogLanguageImpl)) {
-                    LOG.error ("An error occurred while analyzing", ex);
-                }
-            }
-        }
-        
-        /**
-         * New content has been sent
-         * Notify us to restart
-         *
-         * @param content New source
-         */
-        public synchronized void restartWith (Content content) {
-            waiting = true;
-            this.content = content;
-        }
-        
-        /**
-         * A delegate for token stream loop
-         * To make it stop in time
-         */
-        public class Delegate {
-            
-            /**
-             * Whether new input is set
-             * If it returns true,you should stop your tokenizing at once
-             *
-             * @return Whether re-analyze required
-             */
-            public boolean shouldAnalyze () {
-                return !waiting;
-            }
-            
-        }
-        
-    }
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/util/IntPair.java b/app/src/main/java/io/github/rosemoe/editor/util/IntPair.java
deleted file mode 100755
index 9d1370204..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/util/IntPair.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.util;
-
-/**
- * Pack two int into a long
- * Also unpack it
- * This is convenient while passing data
- *
- * @author Rose
- */
-public class IntPair {
-
-    /**
-     * Convert an integer to a long whose binary bits are equal to the given integer
-     */
-    private static long toUnsignedLong(int x) {
-        return ((long) x) & 0xffffffffL;
-    }
-
-    /**
-     * Pack two int into a long
-     *
-     * @param first  First of pair
-     * @param second Second of pair
-     * @return Packed value
-     */
-    public static long pack(int first, int second) {
-        return (toUnsignedLong(first) << 32L) | toUnsignedLong(second);
-    }
-
-    /**
-     * Get second of pair
-     *
-     * @param packedValue Packed value
-     * @return Second of pair
-     */
-    public static int getSecond(long packedValue) {
-        return (int) (packedValue & 0xFFFFFFFFL);
-    }
-
-    /**
-     * Get first of pair
-     *
-     * @param packedValue Packed value
-     * @return First of pair
-     */
-    public static int getFirst(long packedValue) {
-        return (int) (packedValue >> 32L);
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/util/LongArrayList.java b/app/src/main/java/io/github/rosemoe/editor/util/LongArrayList.java
deleted file mode 100755
index 25df331a7..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/util/LongArrayList.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.util;
-
-/**
- * ArrayList for primitive type long
- */
-public class LongArrayList {
-
-    private long[] data;
-    private int length;
-
-    public LongArrayList() {
-        data = new long[128];
-    }
-
-    public void add(long value) {
-        data[length++] = value;
-        if (data.length == length) {
-            long[] newData = new long[length << 1];
-            System.arraycopy(data, 0, newData, 0, length);
-            data = newData;
-        }
-    }
-
-    public int size() {
-        return length;
-    }
-
-    public long get(int index) {
-        if (index > length || index < 0) {
-            throw new ArrayIndexOutOfBoundsException(index);
-        }
-        return data[index];
-    }
-
-    public void clear() {
-        length = 0;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/util/Objects.java b/app/src/main/java/io/github/rosemoe/editor/util/Objects.java
deleted file mode 100755
index f842c5b22..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/util/Objects.java
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.util;
-
-/**
- * Compatible implementation of Objects
- *
- * @author Rose
- */
-public class Objects {
-
-    /**
-     * If the value is null, throw a {@link NullPointerException}
-     * Otherwise, return the value
-     */
-    public static <T> T requireNonNull(T value) {
-        if (value == null) {
-            throw new NullPointerException();
-        }
-        return value;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/AbstractLayout.java b/app/src/main/java/io/github/rosemoe/editor/widget/AbstractLayout.java
deleted file mode 100755
index 50e14c29c..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/AbstractLayout.java
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.graphics.Paint;
-
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.FontCache;
-
-/**
- * Base layout implementation of {@link Layout}
- * This class has basic methods for its subclasses to measure texts
- *
- * @author Rose
- */
-abstract class AbstractLayout implements Layout {
-
-    protected CodeEditor editor;
-    protected Content text;
-    protected Paint shadowPaint;
-    protected FontCache fontCache;
-
-    public AbstractLayout(CodeEditor editor, Content text) {
-        this.editor = editor;
-        this.text = text;
-        shadowPaint = new Paint(editor.getTextPaint());
-        fontCache = new FontCache();
-    }
-
-    protected float measureText(CharSequence text, int start, int end) {
-        int tabCount = 0;
-        end = Math.min(text.length(), end);
-        for (int i = start; i < end; i++) {
-            if (text.charAt(i) == '\t') {
-                tabCount++;
-            }
-        }
-        float extraWidth = fontCache.measureChar(' ', shadowPaint) * editor.getTabWidth() - fontCache.measureChar('\t', shadowPaint);
-        return fontCache.measureText(text, start, end, shadowPaint) + tabCount * extraWidth;
-    }
-
-    protected float[] orderedFindCharIndex(float targetOffset, CharSequence str, int index, int end) {
-        float width = 0f;
-        while (index < end && width < targetOffset) {
-            float single = fontCache.measureChar(str.charAt(index), shadowPaint);
-            if (str.charAt(index) == '\t') {
-                single = editor.getTabWidth() * fontCache.measureChar(' ', shadowPaint);
-            }
-            width += single;
-            index++;
-        }
-        return new float[]{index, width};
-    }
-
-    protected float[] orderedFindCharIndex(float targetOffset, CharSequence str) {
-        float width = 0f;
-        int index = 0;
-        int length = str.length();
-        while (index < length && width < targetOffset) {
-            float single = fontCache.measureChar(str.charAt(index), shadowPaint);
-            if (str.charAt(index) == '\t') {
-                single = editor.getTabWidth() * fontCache.measureChar(' ', shadowPaint);
-            }
-            width += single;
-            index++;
-        }
-        return new float[]{index, width};
-    }
-
-    @Override
-    public void destroyLayout() {
-        editor = null;
-        text = null;
-        shadowPaint = null;
-        fontCache = null;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/CodeEditor.java b/app/src/main/java/io/github/rosemoe/editor/widget/CodeEditor.java
deleted file mode 100755
index 1ca5891b5..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/CodeEditor.java
+++ /dev/null
@@ -1,5058 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.annotation.SuppressLint;
-import android.app.Dialog;
-import android.app.ProgressDialog;
-import android.content.ClipData;
-import android.content.ClipboardManager;
-import android.content.Context;
-import android.content.res.Resources;
-import android.graphics.Canvas;
-import android.graphics.Matrix;
-import android.graphics.Paint;
-import android.graphics.Path;
-import android.graphics.Rect;
-import android.graphics.RectF;
-import android.graphics.Typeface;
-import android.os.Bundle;
-import android.text.InputType;
-import android.util.AttributeSet;
-import android.util.MutableInt;
-import android.util.TypedValue;
-import android.view.GestureDetector;
-import android.view.KeyEvent;
-import android.view.LayoutInflater;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.MotionEvent;
-import android.view.ScaleGestureDetector;
-import android.view.View;
-import android.view.accessibility.AccessibilityNodeInfo;
-import android.view.inputmethod.CursorAnchorInfo;
-import android.view.inputmethod.EditorInfo;
-import android.view.inputmethod.ExtractedText;
-import android.view.inputmethod.ExtractedTextRequest;
-import android.view.inputmethod.InputConnection;
-import android.view.inputmethod.InputMethodManager;
-import android.widget.OverScroller;
-import android.widget.SearchView;
-import android.widget.Toast;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.Px;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.view.ActionMode;
-import androidx.appcompat.view.menu.MenuBuilder;
-
-import com.blankj.utilcode.util.ThreadUtils;
-import com.itsaky.androidide.R;
-import com.itsaky.androidide.app.StudioApp;
-import com.itsaky.androidide.databinding.LayoutDialogTextInputBinding;
-import com.itsaky.androidide.lsp.IDELanguageClientImpl;
-import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
-import com.itsaky.androidide.utils.DialogUtils;
-import com.itsaky.androidide.utils.LSPUtils;
-import com.itsaky.androidide.utils.Logger;
-import com.itsaky.androidide.utils.Symbols;
-import com.itsaky.androidide.utils.TypefaceUtils;
-import com.itsaky.lsp.api.ILanguageServer;
-import com.itsaky.lsp.models.CodeActionParams;
-import com.itsaky.lsp.models.CodeActionResult;
-import com.itsaky.lsp.models.DefinitionResult;
-import com.itsaky.lsp.models.DiagnosticItem;
-import com.itsaky.lsp.models.DiagnosticSeverity;
-import com.itsaky.lsp.models.DocumentChangeEvent;
-import com.itsaky.lsp.models.DocumentCloseEvent;
-import com.itsaky.lsp.models.DocumentOpenEvent;
-import com.itsaky.lsp.models.DocumentSaveEvent;
-import com.itsaky.lsp.models.ExpandSelectionParams;
-import com.itsaky.lsp.models.Position;
-import com.itsaky.lsp.models.Range;
-import com.itsaky.lsp.models.ReferenceParams;
-import com.itsaky.lsp.models.ReferenceResult;
-import com.itsaky.lsp.models.SignatureHelp;
-import com.itsaky.lsp.models.SignatureHelpParams;
-import com.itsaky.toaster.Toaster;
-
-import java.io.File;
-import java.util.ArrayList;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.concurrent.CompletableFuture;
-
-import io.github.rosemoe.editor.interfaces.EditorEventListener;
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
-import io.github.rosemoe.editor.interfaces.NewlineHandler;
-import io.github.rosemoe.editor.langs.EmptyLanguage;
-import io.github.rosemoe.editor.struct.BlockLine;
-import io.github.rosemoe.editor.struct.Span;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.ContentLine;
-import io.github.rosemoe.editor.text.ContentListener;
-import io.github.rosemoe.editor.text.Cursor;
-import io.github.rosemoe.editor.text.FontCache;
-import io.github.rosemoe.editor.text.FormatThread;
-import io.github.rosemoe.editor.text.LineRemoveListener;
-import io.github.rosemoe.editor.text.SpanMapUpdater;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import io.github.rosemoe.editor.text.TextAnalyzer;
-import io.github.rosemoe.editor.util.IntPair;
-import io.github.rosemoe.editor.util.LongArrayList;
-
-/**
- * CodeEditor is a editor that can highlight text regions by doing basic syntax analyzing
- * This project in GitHub: https://github.com/Rosemoe/CodeEditor
- * <p>
- * Note:
- * Row and line are different in this editor
- * When we say 'row', it means a line displayed on screen. It can be a part of a line in the text object.
- * When we say 'line', it means a real line in the original text.
- *
- * @author Rosemoe
- */
-@SuppressWarnings ("unused")
-public class CodeEditor extends View implements ContentListener, TextAnalyzer.Callback, FormatThread.FormatResultReceiver, LineRemoveListener {
-    
-    /**
-     * The default size when creating the editor object. Unit is sp.
-     */
-    public static final int DEFAULT_TEXT_SIZE = 20;
-    
-    /**
-     * The default cursor blinking period
-     */
-    public static final int DEFAULT_CURSOR_BLINK_PERIOD = 500;
-    
-    /**
-     * Draw whitespace characters before line content start
-     * <strong>Whitespace here only means space and tab</strong>
-     *
-     * @see #setNonPrintablePaintingFlags(int)
-     */
-    public static final int FLAG_DRAW_WHITESPACE_LEADING = 1;
-    
-    /**
-     * Draw whitespace characters inside line content
-     * <strong>Whitespace here only means space and tab</strong>
-     *
-     * @see #setNonPrintablePaintingFlags(int)
-     */
-    public static final int FLAG_DRAW_WHITESPACE_INNER = 1 << 1;
-    
-    /**
-     * Draw whitespace characters after line content end
-     * <strong>Whitespace here only means space and tab</strong>
-     *
-     * @see #setNonPrintablePaintingFlags(int)
-     */
-    public static final int FLAG_DRAW_WHITESPACE_TRAILING = 1 << 2;
-    
-    /**
-     * Draw whitespace characters even if it is a line full of whitespaces
-     * To apply this, you must enable {@link #FLAG_DRAW_WHITESPACE_LEADING}
-     * <strong>Whitespace here only means space and tab</strong>
-     *
-     * @see #setNonPrintablePaintingFlags(int)
-     */
-    public static final int FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE = 1 << 3;
-    
-    /**
-     * Draw newline signals in text
-     *
-     * @see #setNonPrintablePaintingFlags(int)
-     */
-    public static final int FLAG_DRAW_LINE_SEPARATOR = 1 << 4;
-    
-    /**
-     * Text size scale of small graph
-     */
-    private static final float SCALE_MINI_GRAPH = 0.9f;
-    
-    /*
-     * Internal state identifiers of action mode
-     */
-    static final int ACTION_MODE_NONE = 0;
-    static final int ACTION_MODE_SEARCH_TEXT = 1;
-    static final int ACTION_MODE_SELECT_TEXT = 2;
-    
-    private static final String LOG_TAG = "CodeEditor";
-    
-    protected SymbolPairMatch mLanguageSymbolPairs;
-    
-    Layout mLayout;
-    int mStartedActionMode;
-    
-    private int mTabWidth;
-    private int mCursorPosition;
-    private int mInputType;
-    private int mNonPrintableOptions;
-    private int mCachedLineNumberWidth;
-    private int mFileVersion = 0;
-    private float mDpUnit;
-    private float mDividerWidth;
-    private float mDividerMargin;
-    private float mInsertSelWidth;
-    private float mBlockLineWidth;
-    private float mLineInfoTextSize;
-    private boolean mWait;
-    private boolean mDrag;
-    private boolean mScalable;
-    private boolean mEditable;
-    private boolean mCharPaint;
-    private boolean mAutoIndentEnabled;
-    private boolean mWordwrap;
-    private boolean mUndoEnabled;
-    private boolean mDisplayLnPanel;
-    private boolean mOverScrollEnabled;
-    private boolean mLineNumberEnabled;
-    private boolean mBlockLineEnabled;
-    private boolean mAutoCompletionEnabled;
-    private boolean mCompletionOnComposing;
-    private boolean mHighlightSelectedText;
-    private boolean mHighlightCurrentBlock;
-    private boolean mHighlightCurrentLine;
-    private boolean mSymbolCompletionEnabled;
-    private boolean mVerticalScrollBarEnabled;
-    private boolean mHorizontalScrollBarEnabled;
-    private boolean mLineColorEnabled;
-    private boolean mPinLineNumber;
-    private boolean mFirstLineNumberAlwaysVisible;
-    private RectF mRect;
-    private RectF mRect2;
-    private RectF mLeftHandle;
-    private RectF mRightHandle;
-    private RectF mInsertHandle;
-    private RectF mVerticalScrollBar;
-    private RectF mHorizontalScrollBar;
-    private ClipboardManager mClipboardManager;
-    private InputMethodManager mInputMethodManager;
-    private Cursor mCursor;
-    private Content mText;
-    private TextAnalyzer mSpanner;
-    private Paint mPaint;
-    private Paint mPaintOther;
-    private Paint mPaintGraph;
-    private char[] mBuffer;
-    private char[] mBuffer2;
-    private Matrix mMatrix;
-    private Rect mViewRect;
-    private EditorColorScheme mColors;
-    private String mLnTip = "Line:";
-    private EditorLanguage mLanguage;
-    private ILanguageServer mLanguageServer;
-    private IDELanguageClientImpl mLanguageClient;
-    private long mLastMakeVisible = 0;
-    private EditorAutoCompleteWindow mCompletionWindow;
-    private EditorTouchEventHandler mEventHandler;
-    private Paint.Align mLineNumberAlign;
-    private GestureDetector mBasicDetector;
-    protected EditorTextActionPresenter mTextActionPresenter;
-    private ScaleGestureDetector mScaleDetector;
-    private CursorAnchorInfo.Builder mAnchorInfoBuilder;
-    private MaterialEdgeEffect mVerticalEdgeGlow;
-    private MaterialEdgeEffect mHorizontalGlow;
-    private ExtractedTextRequest mExtracting;
-    private FormatThread mFormatThread;
-    private EditorSearcher mSearcher;
-    private EditorEventListener mListener;
-    private FontCache mFontCache;
-    private Paint.FontMetricsInt mTextMetrics;
-    private Paint.FontMetricsInt mLineNumberMetrics;
-    private Paint.FontMetricsInt mGraphMetrics;
-    private CursorBlink mCursorBlink;
-    private SymbolPairMatch mOverrideSymbolPairs;
-    private final LongArrayList mPostDrawLineNumbers = new LongArrayList ();
-    private CharPosition mLockedSelection;
-    
-    EditorInputConnection mConnection;
-    KeyMetaStates mKeyMetaStates = new KeyMetaStates (this);
-    
-    private File currentFile;
-    
-    public CodeEditor (Context context) {
-        this (context, null);
-    }
-    
-    public CodeEditor (Context context, AttributeSet attrs) {
-        this (context, attrs, 0);
-    }
-    
-    public CodeEditor (Context context, AttributeSet attrs, int defStyleAttr) {
-        this (context, attrs, defStyleAttr, 0);
-    }
-    
-    public CodeEditor (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super (context, attrs, defStyleAttr, defStyleRes);
-        initialize ();
-    }
-    
-    public void setLineColorsEnabled (boolean mLineColorEnabled) {
-        this.mLineColorEnabled = mLineColorEnabled;
-    }
-    
-    public boolean isLineColorsEnabled () {
-        return mLineColorEnabled;
-    }
-    
-    public File getFile () {
-        return currentFile;
-    }
-    
-    /**
-     * Set the current file whose contents this editor is editing <br>
-     * This method must be called only once in this editors lifetime <br>
-     * This will also make sure to send 'textDocument/didOpen' to any provided language server.
-     *
-     * @param file The file that was opened
-     */
-    public void setFile (File file) {
-        this.currentFile = file;
-        
-        if (mSpanner != null) {
-            mSpanner.setFile (file);
-        }
-        
-        if (mLanguageServer != null) {
-            final var text = getText ().toString ();
-            final var event = new DocumentOpenEvent (file.toPath (), text, mFileVersion = 0);
-            mLanguageServer.getDocumentHandler ().onFileOpened (event);
-        }
-    }
-    
-    private String getLanguageIdForFile () {
-        final String name = getFile ().getName ();
-        
-        if (name.endsWith (".java")) {
-            return "java";
-        }
-        
-        if (name.endsWith (".xml")) {
-            return "xml";
-        }
-        
-        if (name.endsWith (".kt")) {
-            return "kotlin";
-        }
-        
-        return "unknown";
-    }
-    
-    /**
-     * Show first line number in screen in word wrap mode
-     *
-     * @see CodeEditor#isFirstLineNumberAlwaysVisible()
-     */
-    public void setFirstLineNumberAlwaysVisible (boolean enabled) {
-        mFirstLineNumberAlwaysVisible = enabled;
-        if (isWordwrap ()) {
-            invalidate ();
-        }
-    }
-    
-    /**
-     * @see CodeEditor#setFirstLineNumberAlwaysVisible(boolean)
-     */
-    public boolean isFirstLineNumberAlwaysVisible () {
-        return mFirstLineNumberAlwaysVisible;
-    }
-    
-    /**
-     * Whether this region has visible region on screen
-     *
-     * @param begin The begin line of code block
-     * @param end   The end line of code block
-     * @param first The first visible line on screen
-     * @param last  The last visible line on screen
-     * @return Whether this block can be seen
-     */
-    private static boolean hasVisibleRegion (int begin, int end, int first, int last) {
-        return (end > first && begin < last);
-    }
-    
-    /**
-     * Check whether the given character is a start sign for emoji
-     *
-     * @param ch Character to check
-     * @return Whether this is leading a emoji
-     */
-    private static boolean isEmoji (char ch) {
-        return ch == 0xd83c || ch == 0xd83d;
-    }
-    
-    /**
-     * Set event listener
-     *
-     * @see EditorEventListener
-     */
-    public void setEventListener (@Nullable EditorEventListener eventListener) {
-        this.mListener = eventListener;
-    }
-    
-    /**
-     * Cancel the next animation for {@link CodeEditor#ensurePositionVisible(int, int)}
-     */
-    protected void cancelAnimation () {
-        mLastMakeVisible = System.currentTimeMillis ();
-    }
-    
-    /**
-     * Hide completion window later
-     */
-    protected void postHideCompletionWindow () {
-        // Avoid meaningless calls
-        if (!mCompletionWindow.isShowing ()) {
-            return;
-        }
-        // We do this because if you hide it at once, the editor seems to flash with unknown reason
-        postDelayed (() -> mCompletionWindow.hide (), 50);
-    }
-    
-    /**
-     * Get using EditorAutoCompleteWindow
-     */
-    @NonNull
-    protected EditorAutoCompleteWindow getAutoCompleteWindow () {
-        return mCompletionWindow;
-    }
-    
-    /**
-     * Get EditorTextActionPresenter instance of this editor
-     *
-     * @return EditorTextActionPresenter
-     */
-    @NonNull
-    protected EditorTextActionPresenter getTextActionPresenter () {
-        return mTextActionPresenter;
-    }
-    
-    /**
-     * Get the width of line number and divider line
-     *
-     * @return The width
-     */
-    protected float measureTextRegionOffset () {
-        return isLineNumberEnabled () ? measureLineNumber () + mDividerMargin * 2 + mDividerWidth : mDpUnit * 5;
-    }
-    
-    /**
-     * Get the rect of left selection handle painted on view
-     *
-     * @return Rect of left handle
-     */
-    protected RectF getLeftHandleRect () {
-        return mLeftHandle;
-    }
-    
-    /**
-     * Get the rect of right selection handle painted on view
-     *
-     * @return Rect of right handle
-     */
-    protected RectF getRightHandleRect () {
-        return mRightHandle;
-    }
-    
-    /**
-     * Get the character's x offset on view
-     *
-     * @param line   The line position of character
-     * @param column The column position of character
-     * @return The x offset on screen
-     */
-    protected float getOffset (int line, int column) {
-        prepareLine (line);
-        return measureText (mBuffer, 0, column) + measureTextRegionOffset () - getOffsetX ();
-    }
-    
-    /**
-     * Prepare editor
-     * Initialize variants
-     */
-    private void initialize () {
-        mFontCache = new FontCache ();
-        mPaint = new Paint ();
-        mPaintOther = new Paint ();
-        mPaintGraph = new Paint ();
-        mMatrix = new Matrix ();
-        mSearcher = new EditorSearcher (this);
-        setCursorBlinkPeriod (DEFAULT_CURSOR_BLINK_PERIOD);
-        mAnchorInfoBuilder = new CursorAnchorInfo.Builder ();
-        mPaint.setAntiAlias (true);
-        mPaintOther.setAntiAlias (true);
-        mPaintGraph.setAntiAlias (true);
-        mPaintOther.setTypeface (Typeface.MONOSPACE);
-        mBuffer = new char[256];
-        mBuffer2 = new char[16];
-        mStartedActionMode = ACTION_MODE_NONE;
-        setTextSize (DEFAULT_TEXT_SIZE);
-        setLineInfoTextSize (mPaint.getTextSize ());
-        mColors = new EditorColorScheme (this::onColorUpdated);
-        mEventHandler = new EditorTouchEventHandler (this);
-        mBasicDetector = new GestureDetector (getContext (), mEventHandler);
-        mBasicDetector.setOnDoubleTapListener (mEventHandler);
-        mScaleDetector = new ScaleGestureDetector (getContext (), mEventHandler);
-        mViewRect = new Rect (0, 0, 0, 0);
-        mRect = new RectF ();
-        mRect2 = new RectF ();
-        mInsertHandle = new RectF ();
-        mLeftHandle = new RectF ();
-        mRightHandle = new RectF ();
-        mVerticalScrollBar = new RectF ();
-        mHorizontalScrollBar = new RectF ();
-        mDividerMargin = TypedValue.applyDimension (TypedValue.COMPLEX_UNIT_DIP, 2, Resources.getSystem ().getDisplayMetrics ());
-        mDividerWidth = mDividerMargin;
-        mInsertSelWidth = mDividerWidth / 2;
-        mDpUnit = mDividerWidth / 2;
-        mDividerMargin = mDpUnit * 5;
-        mLineNumberAlign = Paint.Align.LEFT;
-        mDrag = false;
-        mWait = false;
-        mBlockLineEnabled = true;
-        mBlockLineWidth = mDpUnit / 1.5f;
-        mInputMethodManager = (InputMethodManager) getContext ().getSystemService (Context.INPUT_METHOD_SERVICE);
-        mClipboardManager = (ClipboardManager) getContext ().getSystemService (Context.CLIPBOARD_SERVICE);
-        setUndoEnabled (true);
-        mCursorPosition = -1;
-        setScalable (true);
-        setFocusable (true);
-        setFocusableInTouchMode (true);
-        mConnection = new EditorInputConnection (this);
-        mCompletionWindow = new EditorAutoCompleteWindow (this);
-        
-        mVerticalEdgeGlow = new MaterialEdgeEffect ();
-        mHorizontalGlow = new MaterialEdgeEffect ();
-        mOverrideSymbolPairs = new SymbolPairMatch ();
-        setEditorLanguage (null, null);
-        setText (null);
-        setTextActionMode (TextActionMode.POPUP_WINDOW_2);
-        setTabWidth (4);
-        setHighlightCurrentLine (true);
-        setAutoIndentEnabled (true);
-        setAutoCompletionEnabled (true);
-        setVerticalScrollBarEnabled (true);
-        setHighlightCurrentBlock (true);
-        setHighlightSelectedText (true);
-        setDisplayLnPanel (true);
-        setOverScrollEnabled (true);
-        setHorizontalScrollBarEnabled (true);
-        setSymbolCompletionEnabled (true);
-        setEditable (true);
-        setLineNumberEnabled (true);
-        setLineColorsEnabled (true);
-        setAutoCompletionOnComposing (true);
-        setTypefaceText (TypefaceUtils.jetbrainsMono ());
-        setTypefaceLineNumber (TypefaceUtils.jetbrainsMono ());
-        setPinLineNumber (true);
-        setLineNumberAlign (Paint.Align.RIGHT);
-        setColorScheme (new SchemeAndroidIDE ());
-        setDefaultFocusHighlightEnabled (false);
-        
-        mRect2.set (-1, -1, -1, -1);
-    }
-    
-    /**
-     * Set whether line number region will scroll together with code region
-     *
-     * @see CodeEditor#isLineNumberPinned()
-     */
-    public void setPinLineNumber (boolean pinLineNumber) {
-        mPinLineNumber = pinLineNumber;
-        if (isLineNumberEnabled ()) {
-            invalidate ();
-        }
-    }
-    
-    /**
-     * @see CodeEditor#setPinLineNumber(boolean)
-     */
-    public boolean isLineNumberPinned () {
-        return mPinLineNumber;
-    }
-    
-    public void showOrHideDiagnosticWindow () {
-        if (mLanguageClient == null) {
-            return;
-        }
-        final int line = getCursor ().getLeftLine ();
-        final int column = getCursor ().getLeftColumn ();
-        final DiagnosticItem diag = getEditorLanguage ().getAnalyzer ().findDiagnosticContaining (line, column);
-        
-        if (diag == null) {
-            mLanguageClient.hideDiagnostics ();
-        } else {
-            mLanguageClient.showDiagnostic (diag, this);
-        }
-    }
-    
-    /**
-     * Define symbol pairs for any language,
-     * Override language settings.
-     * <p>
-     * Use {@link SymbolPairMatch.Replacement#NO_REPLACEMENT} to force no completion for a character
-     */
-    @NonNull
-    public SymbolPairMatch getOverrideSymbolPairs () {
-        return mOverrideSymbolPairs;
-    }
-    
-    /**
-     * @see CodeEditor#setSymbolCompletionEnabled(boolean)
-     */
-    public boolean isSymbolCompletionEnabled () {
-        return mSymbolCompletionEnabled;
-    }
-    
-    /**
-     * Control whether auto-completes for symbol pairs
-     */
-    public void setSymbolCompletionEnabled (boolean symbolCompletionEnabled) {
-        mSymbolCompletionEnabled = symbolCompletionEnabled;
-    }
-    
-    /**
-     * Create a channel to insert symbols
-     */
-    public SymbolChannel createNewSymbolChannel () {
-        return new SymbolChannel (this);
-    }
-    
-    /**
-     * Set adapter for auto-completion window
-     * Will take effect next time the window updates
-     *
-     * @param adapter New adapter, maybe null
-     */
-    public void setAutoCompletionItemAdapter (@Nullable EditorCompletionAdapter adapter) {
-        mCompletionWindow.setAdapter (adapter);
-    }
-    
-    /**
-     * Set cursor blinking period
-     * If zero or negative period is passed, the cursor will always be shown.
-     *
-     * @param period The period time of cursor blinking
-     */
-    public void setCursorBlinkPeriod (int period) {
-        if (mCursorBlink == null) {
-            mCursorBlink = new CursorBlink (this, period);
-        } else {
-            int before = mCursorBlink.period;
-            mCursorBlink.setPeriod (period);
-            if (before <= 0 && mCursorBlink.valid && isAttachedToWindow ()) {
-                post (mCursorBlink);
-            }
-        }
-    }
-    
-    /**
-     * Returns whether highlight current code block
-     *
-     * @return This module enabled / disabled
-     * @see CodeEditor#setHighlightCurrentBlock(boolean)
-     */
-    public boolean isHighlightCurrentBlock () {
-        return mHighlightCurrentBlock;
-    }
-    
-    /**
-     * Whether the editor should use a different color to draw
-     * the current code block line and this code block's start line and end line's
-     * background.
-     *
-     * @param highlightCurrentBlock Enabled / Disabled this module
-     */
-    public void setHighlightCurrentBlock (boolean highlightCurrentBlock) {
-        this.mHighlightCurrentBlock = highlightCurrentBlock;
-        if (!mHighlightCurrentBlock) {
-            mCursorPosition = -1;
-        } else {
-            mCursorPosition = findCursorBlock ();
-        }
-        invalidate ();
-    }
-    
-    /**
-     * Whether the editor should use a different color to draw
-     * the background of current line
-     */
-    public void setHighlightCurrentLine (boolean highlightCurrentLine) {
-        mHighlightCurrentLine = highlightCurrentLine;
-        invalidate ();
-    }
-    
-    /**
-     * @see CodeEditor#setHighlightCurrentLine(boolean)
-     */
-    public boolean isHighlightCurrentLine () {
-        return mHighlightCurrentLine;
-    }
-    
-    /**
-     * Set the editor's language.
-     * A language is a for auto completion,highlight and auto indent analysis.
-     *
-     * @param lang New EditorLanguage for editor
-     */
-    public void setEditorLanguage (@Nullable EditorLanguage lang, @Nullable ILanguageServer server) {
-        if (lang == null) {
-            lang = new EmptyLanguage ();
-        }
-        this.mLanguage = lang;
-        this.mLanguageServer = server;
-        this.mLanguageClient = IDELanguageClientImpl.isInitialized () ? IDELanguageClientImpl.getInstance () : null;
-        
-        // Update spanner
-        if (mSpanner != null) {
-            mSpanner.shutdown ();
-            mSpanner.setCallback (null);
-        }
-        mSpanner = new TextAnalyzer (mLanguage, mLanguageServer, getFile ());
-        mSpanner.setCallback (this);
-        if (mText != null) {
-            mSpanner.analyze (mText);
-        }
-        if (mCompletionWindow != null) {
-            mCompletionWindow.hide ();
-            mCompletionWindow.setProvider (lang.getAutoCompleteProvider ());
-        }
-        
-        hideDiagnosticWindow ();
-        
-        // Symbol pairs
-        if (mLanguageSymbolPairs != null) {
-            mLanguageSymbolPairs.setParent (null);
-        }
-        mLanguageSymbolPairs = mLanguage.getSymbolPairs ();
-        if (mLanguageSymbolPairs == null) {
-            mLanguageSymbolPairs = new SymbolPairMatch ();
-        }
-        mLanguageSymbolPairs.setParent (mOverrideSymbolPairs);
-        
-        // Cursor
-        if (mCursor != null) {
-            mCursor.setLanguage (mLanguage);
-        }
-        
-        invalidate ();
-    }
-    
-    public EditorLanguage getEditorLanguage () {
-        return mLanguage;
-    }
-    
-    /**
-     * Get the {@link ILanguageServer current language server} which is set to this editor
-     * May return null;
-     *
-     * @return Current language server or {@code null}.
-     */
-    public ILanguageServer getLanguageServer () {
-        return mLanguageServer;
-    }
-    
-    /**
-     * Get the language client attached to this Editor
-     *
-     * @return The language client currently attached
-     */
-    public IDELanguageClientImpl getLanguageClient () {
-        return mLanguageClient;
-    }
-    
-    /**
-     * Getter
-     *
-     * @return The width in dp unit
-     * @see CodeEditor#setBlockLineWidth(float)
-     */
-    public float getBlockLineWidth () {
-        return mBlockLineWidth;
-    }
-    
-    /**
-     * Set the width of code block line
-     *
-     * @param dp Width in dp unit
-     */
-    public void setBlockLineWidth (float dp) {
-        mBlockLineWidth = dp;
-        invalidate ();
-    }
-    
-    /**
-     * @see #setWordwrap(boolean)
-     */
-    public boolean isWordwrap () {
-        return mWordwrap;
-    }
-    
-    /**
-     * Set whether text in editor should be wrapped to fit its size
-     *
-     * @param wordwrap Whether to wrap words
-     */
-    public void setWordwrap (boolean wordwrap) {
-        if (mWordwrap != wordwrap) {
-            mWordwrap = wordwrap;
-            createLayout ();
-            invalidate ();
-        }
-    }
-    
-    /**
-     * Whether display vertical scroll bar when scrolling
-     *
-     * @param enabled Enabled / disabled
-     */
-    public void setScrollBarEnabled (boolean enabled) {
-        mVerticalScrollBarEnabled = mHorizontalScrollBarEnabled = enabled;
-        invalidate ();
-    }
-    
-    /**
-     * @return Enabled / disabled
-     * @see CodeEditor#setDisplayLnPanel(boolean)
-     */
-    public boolean isDisplayLnPanel () {
-        return mDisplayLnPanel;
-    }
-    
-    /**
-     * Whether display the line number panel beside vertical scroll bar
-     * when the scroll bar is touched by user
-     *
-     * @param displayLnPanel Enabled / disabled
-     */
-    public void setDisplayLnPanel (boolean displayLnPanel) {
-        this.mDisplayLnPanel = displayLnPanel;
-        invalidate ();
-    }
-    
-    /**
-     * Set how will the editor present text actions
-     */
-    public void setTextActionMode (TextActionMode mode) {
-        if (mCursor.isSelected ()) {
-            setSelection (mCursor.getLeftLine (), mCursor.getLeftColumn ());
-        }
-        if (mode == TextActionMode.ACTION_MODE) {
-            mTextActionPresenter = new EditorTextActionModeStarter (this);
-        } else if (mode == TextActionMode.POPUP_WINDOW_2) {
-            mTextActionPresenter = new TextActionPopupWindow (this);
-        } else {
-            mTextActionPresenter = new EditorTextActionWindow (this);
-        }
-    }
-    
-    /**
-     * @return The prefix
-     * @see CodeEditor#setLnTip(String)
-     */
-    public String getLnTip () {
-        return mLnTip;
-    }
-    
-    /**
-     * Set the tip text before line number for the line number panel
-     *
-     * @param prefix The prefix for text
-     */
-    public void setLnTip (String prefix) {
-        if (prefix == null) {
-            prefix = "";
-        }
-        mLnTip = prefix;
-        invalidate ();
-    }
-    
-    /**
-     * @return Enabled / disabled
-     * @see CodeEditor#setAutoIndentEnabled(boolean)
-     */
-    public boolean isAutoIndentEnabled () {
-        return mAutoIndentEnabled;
-    }
-    
-    /**
-     * Set whether auto indent should be executed when user enters
-     * a NEWLINE
-     *
-     * @param enabled Enabled / disabled
-     */
-    public void setAutoIndentEnabled (boolean enabled) {
-        mAutoIndentEnabled = enabled;
-        mCursor.setAutoIndent (enabled);
-    }
-    
-    @Override
-    public boolean isHorizontalScrollBarEnabled () {
-        return mHorizontalScrollBarEnabled;
-    }
-    
-    @Override
-    public void setHorizontalScrollBarEnabled (boolean horizontalScrollBarEnabled) {
-        mHorizontalScrollBarEnabled = horizontalScrollBarEnabled;
-    }
-    
-    @Override
-    public boolean isVerticalScrollBarEnabled () {
-        return mVerticalScrollBarEnabled;
-    }
-    
-    @Override
-    public void setVerticalScrollBarEnabled (boolean verticalScrollBarEnabled) {
-        mVerticalScrollBarEnabled = verticalScrollBarEnabled;
-    }
-    
-    /**
-     * Get the rect of vertical scroll bar on view
-     *
-     * @return Rect of scroll bar
-     */
-    protected RectF getVerticalScrollBarRect () {
-        return mVerticalScrollBar;
-    }
-    
-    /**
-     * Get the rect of horizontal scroll bar on view
-     *
-     * @return Rect of scroll bar
-     */
-    protected RectF getHorizontalScrollBarRect () {
-        return mHorizontalScrollBar;
-    }
-    
-    /**
-     * Get the rect of insert cursor handle on view
-     *
-     * @return Rect of insert handle
-     */
-    protected RectF getInsertHandleRect () {
-        return mInsertHandle;
-    }
-    
-    /**
-     * Get text size in pixel unit
-     *
-     * @return Text size in pixel unit
-     * @see CodeEditor#setTextSize(float)
-     * @see CodeEditor#setTextSizePx(float)
-     */
-    @Px
-    public float getTextSizePx () {
-        return mPaint.getTextSize ();
-    }
-    
-    /**
-     * Set text size in pixel unit
-     *
-     * @param size Text size in pixel unit
-     */
-    public void setTextSizePx (@Px float size) {
-        setTextSizePxDirect (size);
-        createLayout ();
-        invalidate ();
-    }
-    
-    /**
-     * Set text size directly without creating layout or invalidating view
-     *
-     * @param size Text size in pixel unit
-     */
-    void setTextSizePxDirect (float size) {
-        mPaint.setTextSize (size);
-        mPaintOther.setTextSize (size);
-        mPaintGraph.setTextSize (size * SCALE_MINI_GRAPH);
-        mTextMetrics = mPaint.getFontMetricsInt ();
-        mLineNumberMetrics = mPaintOther.getFontMetricsInt ();
-        mGraphMetrics = mPaintGraph.getFontMetricsInt ();
-        mFontCache.clearCache ();
-    }
-    
-    /**
-     * Paint the view on given Canvas
-     *
-     * @param canvas Canvas you want to draw
-     */
-    private void drawView (Canvas canvas) {
-        //record();
-        //counter = 0;
-        mSpanner.notifyRecycle ();
-        if (mFormatThread != null) {
-            String text = "Formatting your code...";
-            float centerY = getHeight () / 2f;
-            drawColor (canvas, mColors.getColor (EditorColorScheme.LINE_NUMBER_PANEL), mRect);
-            float baseline = centerY - getRowHeight () / 2f + getRowBaseline (0);
-            float centerX = getWidth () / 2f;
-            mPaint.setColor (mColors.getColor (EditorColorScheme.LINE_NUMBER_PANEL_TEXT));
-            mPaint.setTextAlign (Paint.Align.CENTER);
-            canvas.drawText (text, centerX, baseline, mPaint);
-            mPaint.setTextAlign (Paint.Align.LEFT);
-            return;
-        }
-        
-        getCursor ().updateCache (getFirstVisibleLine ());
-        
-        EditorColorScheme color = mColors;
-        drawColor (canvas, color.getColor (EditorColorScheme.WHOLE_BACKGROUND), mViewRect);
-        
-        float lineNumberWidth = measureLineNumber ();
-        float offsetX = -getOffsetX () + measureTextRegionOffset ();
-        float textOffset = offsetX;
-        
-        if (isWordwrap ()) {
-            if (mCachedLineNumberWidth == 0) {
-                mCachedLineNumberWidth = (int) lineNumberWidth;
-            } else if (mCachedLineNumberWidth != (int) lineNumberWidth && !mEventHandler.isScaling) {
-                mCachedLineNumberWidth = (int) lineNumberWidth;
-                createLayout ();
-            }
-        } else {
-            mCachedLineNumberWidth = 0;
-        }
-        
-        if (!mCursor.isSelected ()) {
-            mInsertHandle.setEmpty ();
-        }
-        if (!mTextActionPresenter.shouldShowCursor ()) {
-            mLeftHandle.setEmpty ();
-            mRightHandle.setEmpty ();
-        }
-        
-        boolean lineNumberNotPinned = isLineNumberEnabled () && (isWordwrap () || !isLineNumberPinned ());
-        
-        LongArrayList postDrawLineNumbers = mPostDrawLineNumbers;
-        postDrawLineNumbers.clear ();
-        LongArrayList postDrawCurrentLines = new LongArrayList ();
-        List<CursorPaintAction> postDrawCursor = new ArrayList<> ();
-        MutableInt firstLn = isFirstLineNumberAlwaysVisible () && isWordwrap () ? new MutableInt (-1) : null;
-        
-        drawRows (canvas, textOffset, postDrawLineNumbers, postDrawCursor, postDrawCurrentLines, firstLn);
-        
-        offsetX = -getOffsetX ();
-        
-        if (isLineNumberEnabled () && lineNumberNotPinned) {
-            drawLineNumberBackground (canvas, offsetX, lineNumberWidth + mDividerMargin, color.getColor (EditorColorScheme.LINE_NUMBER_BACKGROUND));
-            drawDivider (canvas, offsetX + lineNumberWidth + mDividerMargin, color.getColor (EditorColorScheme.LINE_DIVIDER));
-            int lineNumberColor = mColors.getColor (EditorColorScheme.LINE_NUMBER);
-            int currentLineBgColor = mColors.getColor (EditorColorScheme.CURRENT_LINE);
-            for (int i = 0; i < postDrawCurrentLines.size (); i++) {
-                drawRowBackground (canvas, currentLineBgColor, (int) postDrawCurrentLines.get (i), (int) (textOffset - mDividerMargin));
-            }
-            if (firstLn != null && firstLn.value != -1) {
-                int bottom = getRowBottom (0);
-                float y;
-                if (postDrawLineNumbers.size () == 0 || getRowTop (IntPair.getSecond (postDrawLineNumbers.get (0))) - getOffsetY () > bottom) {
-                    // Free to draw at first line
-                    y = (getRowBottom (0) + getRowTop (0)) / 2f - (mLineNumberMetrics.descent - mLineNumberMetrics.ascent) / 2f - mLineNumberMetrics.ascent;
-                } else {
-                    int row = IntPair.getSecond (postDrawLineNumbers.get (0));
-                    y = (getRowBottom (row - 1) + getRowTop (row - 1)) / 2f - (mLineNumberMetrics.descent - mLineNumberMetrics.ascent) / 2f - mLineNumberMetrics.ascent - getOffsetY ();
-                }
-                mPaintOther.setTextAlign (mLineNumberAlign);
-                mPaintOther.setColor (lineNumberColor);
-                switch (mLineNumberAlign) {
-                    case LEFT:
-                        canvas.drawText (Integer.toString (firstLn.value + 1), offsetX, y, mPaintOther);
-                        break;
-                    case RIGHT:
-                        canvas.drawText (Integer.toString (firstLn.value + 1), offsetX + lineNumberWidth, y, mPaintOther);
-                        break;
-                    case CENTER:
-                        canvas.drawText (Integer.toString (firstLn.value + 1), offsetX + (lineNumberWidth + mDividerMargin) / 2f, y, mPaintOther);
-                }
-            }
-            for (int i = 0; i < postDrawLineNumbers.size (); i++) {
-                long packed = postDrawLineNumbers.get (i);
-                drawLineNumber (canvas, IntPair.getFirst (packed), IntPair.getSecond (packed), offsetX, lineNumberWidth, lineNumberColor);
-            }
-        }
-        
-        if (!isWordwrap () && isBlockLineEnabled ()) {
-            drawBlockLines (canvas, textOffset);
-        }
-        
-        for (CursorPaintAction action : postDrawCursor) {
-            action.exec (canvas, this);
-        }
-        
-        if (!lineNumberNotPinned) {
-            drawLineNumberBackground (canvas, 0, lineNumberWidth + mDividerMargin, color.getColor (EditorColorScheme.LINE_NUMBER_BACKGROUND));
-            drawDivider (canvas, lineNumberWidth + mDividerMargin, color.getColor (EditorColorScheme.LINE_DIVIDER));
-            int lineNumberColor = mColors.getColor (EditorColorScheme.LINE_NUMBER);
-            int currentLineBgColor = mColors.getColor (EditorColorScheme.CURRENT_LINE);
-            for (int i = 0; i < postDrawCurrentLines.size (); i++) {
-                drawRowBackground (canvas, currentLineBgColor, (int) postDrawCurrentLines.get (i), (int) (textOffset - mDividerMargin));
-            }
-            for (int i = 0; i < postDrawLineNumbers.size (); i++) {
-                long packed = postDrawLineNumbers.get (i);
-                drawLineNumber (canvas, IntPair.getFirst (packed), IntPair.getSecond (packed), 0, lineNumberWidth, lineNumberColor);
-            }
-        }
-        
-        drawScrollBars (canvas);
-        drawEdgeEffect (canvas);
-        //print();
-        //Log.d(LOG_TAG, "drawText() calls count = " + counter);
-    }
-    
-    /**
-     * Clear flag in flags
-     * The flag must be power of two
-     *
-     * @param flags Flags to filter
-     * @param flag  The flag to clear
-     * @return Cleared flags
-     */
-    private int clearFlag (int flags, int flag) {
-        return (flags & flag) != 0 ? flags ^ flag : flags;
-    }
-    
-    /**
-     * Whether non-printable is to be drawn
-     */
-    private boolean shouldInitializeNonPrintable () {
-        return clearFlag (mNonPrintableOptions, FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE) != 0;
-    }
-    
-    /**
-     * Draw rows with a {@link RowIterator}
-     *
-     * @param canvas              Canvas to draw
-     * @param offset              Offset of text region start
-     * @param postDrawLineNumbers Line numbers to be drawn later
-     * @param postDrawCursor      Cursors to be drawn later
-     */
-    private void drawRows (Canvas canvas, float offset, LongArrayList postDrawLineNumbers, List<CursorPaintAction> postDrawCursor, LongArrayList postDrawCurrentLines, MutableInt requiredFirstLn) {
-        RowIterator rowIterator = mLayout.obtainRowIterator (getFirstVisibleRow ());
-        List<Span> temporaryEmptySpans = null;
-        List<List<Span>> spanMap = mSpanner.getResult ().getSpanMap ();
-        List<Integer> matchedPositions = new ArrayList<> ();
-        int currentLine = mCursor.isSelected () ? -1 : mCursor.getLeftLine ();
-        int currentLineBgColor = mColors.getColor (EditorColorScheme.CURRENT_LINE);
-        int lastPreparedLine = -1;
-        int spanOffset = 0;
-        int leadingWhitespaceEnd = 0;
-        int trailingWhitespaceStart = 0;
-        float circleRadius = 0f;
-        if (shouldInitializeNonPrintable ()) {
-            float spaceWidth = mFontCache.measureChar (' ', mPaint);
-            float maxD = Math.min (getRowHeight (), spaceWidth);
-            maxD *= 0.18f;
-            circleRadius = maxD / 2;
-        }
-        
-        for (int row = getFirstVisibleRow (); row <= getLastVisibleRow () && rowIterator.hasNext (); row++) {
-            Row rowInf = rowIterator.next ();
-            int line = rowInf.lineIndex;
-            ContentLine contentLine = mText.getLine (line);
-            int columnCount = contentLine.length ();
-            if (row == getFirstVisibleRow () && requiredFirstLn != null) {
-                requiredFirstLn.value = line;
-            } else if (rowInf.isLeadingRow) {
-                postDrawLineNumbers.add (IntPair.pack (line, row));
-            }
-            
-            // Prepare data
-            if (lastPreparedLine != line) {
-                lastPreparedLine = line;
-                prepareLine (line);
-                computeMatchedPositions (line, matchedPositions);
-                spanOffset = 0;
-                if (shouldInitializeNonPrintable ()) {
-                    long positions = findLeadingAndTrailingWhitespacePos (line);
-                    leadingWhitespaceEnd = IntPair.getFirst (positions);
-                    trailingWhitespaceStart = IntPair.getSecond (positions);
-                }
-            }
-            
-            // Get visible region on line
-            float[] charPos = findFirstVisibleChar (offset, rowInf.startColumn, rowInf.endColumn, mBuffer);
-            int firstVisibleChar = (int) charPos[0];
-            int lastVisibleChar = firstVisibleChar;
-            float paintingOffset = charPos[1];
-            float temporaryOffset = paintingOffset;
-            while (temporaryOffset < getWidth () && lastVisibleChar < columnCount) {
-                char ch = mBuffer[lastVisibleChar];
-                if (isEmoji (ch) && lastVisibleChar + 1 < columnCount) {
-                    temporaryOffset += mFontCache.measureText (mBuffer, lastVisibleChar, lastVisibleChar + 2, mPaint);
-                    lastVisibleChar++;
-                } else {
-                    temporaryOffset += mFontCache.measureChar (mBuffer[lastVisibleChar], mPaint);
-                }
-                lastVisibleChar++;
-            }
-            lastVisibleChar = Math.min (lastVisibleChar, rowInf.endColumn);
-            
-            // Draw matched text background
-            if (!matchedPositions.isEmpty ()) {
-                for (int position : matchedPositions) {
-                    drawRowRegionBackground (canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, position, position + mSearcher.mSearchText.length (), mColors.getColor (EditorColorScheme.MATCHED_TEXT_BACKGROUND));
-                }
-            }
-            
-            float backupOffset = paintingOffset;
-            
-            // Draw selected text background
-            if (mCursor.isSelected () && line >= mCursor.getLeftLine () && line <= mCursor.getRightLine ()) {
-                int selectionStart = 0;
-                int selectionEnd = columnCount;
-                if (line == mCursor.getLeftLine ()) {
-                    selectionStart = mCursor.getLeftColumn ();
-                }
-                if (line == mCursor.getRightLine ()) {
-                    selectionEnd = mCursor.getRightColumn ();
-                }
-                drawRowRegionBackground (canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, selectionStart, selectionEnd, mColors.getColor (EditorColorScheme.SELECTED_TEXT_BACKGROUND));
-            }
-            
-            // Draw current line background
-            if (line == currentLine) {
-                drawRowBackground (canvas, currentLineBgColor, row);
-                postDrawCurrentLines.add (row);
-            }
-            
-            // Draw text here
-            {
-                // Get spans
-                List<Span> spans = null;
-                if (line < spanMap.size () && line >= 0) {
-                    spans = spanMap.get (line);
-                }
-                if (spans == null || spans.size () == 0) {
-                    if (temporaryEmptySpans == null) {
-                        temporaryEmptySpans = new LinkedList<> ();
-                        temporaryEmptySpans.add (Span.obtain (line, 0, EditorColorScheme.TEXT_NORMAL));
-                    }
-                    spans = temporaryEmptySpans;
-                }
-                
-                while (spanOffset + 1 < spans.size ()) {
-                    if (spans.get (spanOffset + 1).column <= firstVisibleChar) {
-                        spanOffset++;
-                    } else {
-                        break;
-                    }
-                }
-                Span span = spans.get (spanOffset);
-                // Draw by spans
-                while (lastVisibleChar > span.column) {
-                    int spanEnd = spanOffset + 1 >= spans.size () ? columnCount : spans.get (spanOffset + 1).column;
-                    int paintStart = Math.max (firstVisibleChar, span.column);
-                    int paintEnd = Math.min (lastVisibleChar, spanEnd);
-                    float width = measureText (mBuffer, paintStart, paintEnd - paintStart);
-                    
-                    // Draw text
-                    drawRegionText (canvas, paintingOffset, getRowBaseline (row) - getOffsetY (), line, paintStart, paintEnd, columnCount, mColors.getColor (span.colorId));
-                    
-                    // Draw underline
-                    if (span.underlineColor != 0) {
-                        mRect.bottom = getRowBottom (line) - getOffsetY () - (mDpUnit * 0.5f);
-                        mRect.top = mRect.bottom - getRowHeight () * span.underlineHeight;
-                        mRect.left = paintingOffset;
-                        mRect.right = paintingOffset + width;
-                        drawColor (canvas, span.underlineColor, mRect);
-                    }
-                    
-                    paintingOffset += width;
-                    
-                    if (paintEnd == lastVisibleChar) {
-                        break;
-                    }
-                    
-                    spanOffset++;
-                    if (spanOffset < spans.size ()) {
-                        span = spans.get (spanOffset);
-                    } else {
-                        spanOffset--;
-                    }
-                }
-            }
-            
-            // Draw hard wrap
-            if (lastVisibleChar == columnCount && (mNonPrintableOptions & FLAG_DRAW_LINE_SEPARATOR) != 0) {
-                drawMiniGraph (canvas, paintingOffset, row, "↵");
-            }
-            
-            // Recover the offset
-            paintingOffset = backupOffset;
-            
-            // Draw non-printable characters
-            if (circleRadius != 0f && (leadingWhitespaceEnd != columnCount || (mNonPrintableOptions & FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE) != 0)) {
-                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_LEADING) != 0) {
-                    drawWhitespaces (canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, 0, leadingWhitespaceEnd, circleRadius);
-                }
-                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_INNER) != 0) {
-                    drawWhitespaces (canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, leadingWhitespaceEnd, trailingWhitespaceStart, circleRadius);
-                }
-                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_TRAILING) != 0) {
-                    drawWhitespaces (canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, trailingWhitespaceStart, columnCount, circleRadius);
-                }
-            }
-            
-            // Draw composing text underline
-            if (line == mConnection.mComposingLine) {
-                int composingStart = mConnection.mComposingStart;
-                int composingEnd = mConnection.mComposingEnd;
-                int paintStart = Math.min (Math.max (composingStart, firstVisibleChar), lastVisibleChar);
-                int paintEnd = Math.min (Math.max (composingEnd, firstVisibleChar), lastVisibleChar);
-                if (paintStart != paintEnd) {
-                    mRect.top = getRowBottom (row) - getOffsetY ();
-                    mRect.bottom = mRect.top + getRowHeight () * 0.06f;
-                    mRect.left = paintingOffset + measureText (mBuffer, firstVisibleChar, paintStart - firstVisibleChar);
-                    mRect.right = mRect.left + measureText (mBuffer, paintStart, paintEnd - paintStart);
-                    drawColor (canvas, mColors.getColor (EditorColorScheme.UNDERLINE), mRect);
-                }
-            }
-            
-            final Paint.Style style = mPaint.getStyle ();
-            final float stroke = mPaint.getStrokeWidth ();
-            
-            mPaint.setStyle (Paint.Style.STROKE);
-            mPaint.setStrokeWidth (getDpUnit () * 1.4f);
-            final List<DiagnosticItem> diags = getEditorLanguage ().getAnalyzer ().findDiagnosticsContainingLine (line);
-            final int size = diags == null ? 0 : diags.size ();
-            
-            for (int i = 0; i < size; i++) {
-                DiagnosticItem d = diags.get (i);
-                if (d == null) {
-                    continue;
-                }
-                int startCol = d.getRange ().getStart ().getColumn ();
-                int endCol = d.getRange ().getEnd ().getColumn ();
-                startCol = line > d.getRange ().getStart ().getColumn () ? 0 : startCol;
-                endCol = line > d.getRange ().getEnd ().getColumn () ? 0 : endCol;
-                
-                if (startCol == endCol) {
-                    endCol++;
-                }
-                
-                final int paintStart = Math.max (firstVisibleChar, startCol);
-                final int paintEnd = Math.min (lastVisibleChar, endCol);
-                final float width = measureText (mBuffer, paintStart, paintEnd - paintStart);
-                
-                final RectF r = new RectF ();
-                r.bottom = getRowBottom (line) - getOffsetY () - mDpUnit;
-                r.top = r.bottom - getRowHeight () * 0.2f;
-                r.left = paintingOffset + measureText (mBuffer, firstVisibleChar, paintStart - firstVisibleChar);
-                r.right = r.left + width;
-                
-                mPaint.setColor (diagnosticColor (d. getSeverity ()));
-                drawDiagnostics (r, canvas, mPaint);
-            }
-            
-            mPaint.setStyle (style);
-            mPaint.setStrokeWidth (stroke);
-            
-            // Draw cursors
-            if (mCursor.isSelected ()) {
-                if (mTextActionPresenter.shouldShowCursor ()) {
-                    if (mCursor.getLeftLine () == line && isInside (mCursor.getLeftColumn (), firstVisibleChar, lastVisibleChar, line)) {
-                        float centerX = paintingOffset + measureText (mBuffer, firstVisibleChar, mCursor.getLeftColumn () - firstVisibleChar);
-                        postDrawCursor.add (new CursorPaintAction (row, centerX, mLeftHandle, false, EditorTouchEventHandler.SelectionHandle.LEFT));
-                    }
-                    if (mCursor.getRightLine () == line && isInside (mCursor.getRightColumn (), firstVisibleChar, lastVisibleChar, line)) {
-                        float centerX = paintingOffset + measureText (mBuffer, firstVisibleChar, mCursor.getRightColumn () - firstVisibleChar);
-                        postDrawCursor.add (new CursorPaintAction (row, centerX, mRightHandle, false, EditorTouchEventHandler.SelectionHandle.RIGHT));
-                    }
-                }
-            } else if (mCursor.getLeftLine () == line && isInside (mCursor.getLeftColumn (), firstVisibleChar, lastVisibleChar, line)) {
-                float centerX = paintingOffset + measureText (mBuffer, firstVisibleChar, mCursor.getLeftColumn () - firstVisibleChar);
-                postDrawCursor.add (new CursorPaintAction (row, centerX, mEventHandler.shouldDrawInsertHandle () ? mInsertHandle : null, true));
-            }
-            
-        }
-    }
-    
-    private void drawDiagnostics (final RectF rect, final Canvas canvas, final Paint paint) {
-        final Path path = new Path ();
-        final float right = rect.right;
-        final float bottom = rect.bottom;
-        final float waveLength = getDpUnit () * 5f;
-        final float halfLength = waveLength / 2;
-        final float waveAmplitude = getDpUnit () * 4f;
-        
-        path.moveTo (rect.left, rect.bottom);
-        float x = rect.left;
-        while (right > x) {
-            path.quadTo (x + halfLength, bottom - waveAmplitude, x + waveLength, bottom);
-            x += waveLength;
-            path.quadTo (x + halfLength, bottom + waveAmplitude, x + waveLength, bottom);
-            x += waveLength;
-            if (x > right) {
-                x = right;
-            }
-        }
-        
-        canvas.drawPath (path, paint);
-    }
-    
-    private void drawRowBackground (Canvas canvas, int color, int row, int right) {
-        mRect.top = getRowTop (row) - getOffsetY ();
-        mRect.bottom = getRowBottom (row) - getOffsetY ();
-        mRect.left = 0;
-        mRect.right = right;
-        drawColor (canvas, color, mRect);
-    }
-    
-    /**
-     * Draw code block lines on screen
-     *
-     * @param canvas  The canvas to draw
-     * @param offsetX The start x offset for text
-     */
-    private void drawBlockLines (Canvas canvas, float offsetX) {
-        List<BlockLine> blocks = mSpanner == null ? null : mSpanner.getResult ().getBlocks ();
-        if (blocks == null || blocks.isEmpty ()) {
-            return;
-        }
-        int first = getFirstVisibleRow ();
-        int last = getLastVisibleRow ();
-        boolean mark = false;
-        int invalidCount = 0;
-        int maxCount = Integer.MAX_VALUE;
-        if (mSpanner != null) {
-            TextAnalyzeResult colors = mSpanner.getResult ();
-            if (colors != null) {
-                maxCount = colors.getSuppressSwitch ();
-            }
-        }
-        int mm = binarySearchEndBlock (first, blocks);
-        int cursorIdx = mCursorPosition;
-        for (int curr = mm; curr < blocks.size (); curr++) {
-            BlockLine block = blocks.get (curr);
-            if (hasVisibleRegion (block.startLine, block.endLine, first, last)) {
-                try {
-                    CharSequence lineContent = mText.getLine (block.endLine);
-                    float offset1 = measureText (lineContent, 0, block.endColumn);
-                    lineContent = mText.getLine (block.startLine);
-                    float offset2 = measureText (lineContent, 0, block.startColumn);
-                    float offset = Math.min (offset1, offset2);
-                    float centerX = offset + offsetX;
-                    mRect.top = Math.max (0, getRowBottom (block.startLine) - getOffsetY ());
-                    mRect.bottom = Math.min (getHeight (), getRowTop (block.endLine) - getOffsetY ());
-                    mRect.left = centerX - mDpUnit * mBlockLineWidth / 2;
-                    mRect.right = centerX + mDpUnit * mBlockLineWidth / 2;
-                    drawColor (canvas, mColors.getColor (curr == cursorIdx ? EditorColorScheme.BLOCK_LINE_CURRENT : EditorColorScheme.BLOCK_LINE), mRect);
-                } catch (IndexOutOfBoundsException e) {
-                    //Ignored
-                    //Because the exception usually occurs when the content changed.
-                }
-                mark = true;
-            } else if (mark) {
-                if (invalidCount >= maxCount) {
-                    break;
-                }
-                invalidCount++;
-            }
-        }
-    }
-    
-    private int diagnosticColor (DiagnosticSeverity severity) {
-        int id;
-        switch (severity) {
-            case ERROR:
-                id = EditorColorScheme.DIAGNOSTIC_ERROR;
-                break;
-            case WARNING:
-                id = EditorColorScheme.DIAGNOSTIC_WARNING;
-                break;
-            case INFO:
-                id = EditorColorScheme.DIAGNOSTIC_INFO;
-                break;
-            default:
-                id = EditorColorScheme.DIAGNOSTIC_HINT;
-                break;
-        }
-        return mColors.getColor (id);
-    }
-    
-    protected void showTextActionPopup () {
-        if (mTextActionPresenter instanceof TextActionPopupWindow) {
-            TextActionPopupWindow window = (TextActionPopupWindow) mTextActionPresenter;
-            if (window.isShowing ()) {
-                //window.hide(TextActionPopupWindow.DISMISS);
-            } else {
-                window.onBeginTextSelect ();
-                window.onTextSelectionEnd ();
-            }
-        }
-    }
-    
-    /**
-     * Draw small characters as graph
-     */
-    private void drawMiniGraph (Canvas canvas, float offset, int row, String graph) {
-        // Draw
-        mPaintGraph.setColor (mColors.getColor (EditorColorScheme.NON_PRINTABLE_CHAR));
-        float baseline = getRowBottom (row) - getOffsetY () - mGraphMetrics.descent;
-        canvas.drawText (graph, 0, graph.length (), offset, baseline, mPaintGraph);
-    }
-    
-    /**
-     * Draw non-printable characters
-     */
-    private void drawWhitespaces (Canvas canvas, float offset, int row, int rowStart, int rowEnd, int min, int max, float circleRadius) {
-        int paintStart = Math.max (rowStart, Math.min (rowEnd, min));
-        int paintEnd = Math.max (rowStart, Math.min (rowEnd, max));
-        mPaintOther.setColor (mColors.getColor (EditorColorScheme.NON_PRINTABLE_CHAR));
-        
-        if (paintStart < paintEnd) {
-            float spaceWidth = mFontCache.measureChar (' ', mPaint);
-            float rowCenter = (getRowTop (row) + getRowBottom (row)) / 2f - getOffsetY ();
-            offset += measureText (mBuffer, rowStart, paintStart - rowStart);
-            while (paintStart < paintEnd) {
-                char ch = mBuffer[paintStart];
-                float charWidth = measureText (mBuffer, paintStart, 1);
-                int paintCount = 0;
-                if (ch == ' ') {
-                    paintCount = 1;
-                } else if (ch == '\t') {
-                    paintCount = getTabWidth ();
-                }
-                for (int i = 0; i < paintCount; i++) {
-                    float charStartOffset = offset + spaceWidth * i;
-                    float charEndOffset = charStartOffset + spaceWidth;
-                    float centerOffset = (charStartOffset + charEndOffset) / 2f;
-                    canvas.drawCircle (centerOffset, rowCenter, circleRadius, mPaintOther);
-                }
-                offset += charWidth;
-                paintStart++;
-            }
-        }
-    }
-    
-    /**
-     * As the name is, we find where leading spaces end and trailing spaces start
-     * Before calling this, the line should be prepared
-     *
-     * @param line The line to search
-     */
-    private long findLeadingAndTrailingWhitespacePos (int line) {
-        int column = mText.getColumnCount (line);
-        int leading = 0;
-        int trailing = column;
-        while (leading < column && isWhitespace (mBuffer[leading])) {
-            leading++;
-        }
-        // Only them this action is needed
-        if (leading != column && (mNonPrintableOptions & (FLAG_DRAW_WHITESPACE_INNER | FLAG_DRAW_WHITESPACE_TRAILING)) != 0) {
-            while (trailing > 0 && isWhitespace (mBuffer[trailing - 1])) {
-                trailing--;
-            }
-        }
-        return IntPair.pack (leading, trailing);
-    }
-    
-    /**
-     * A quick method to predicate whitespace character
-     */
-    private boolean isWhitespace (char ch) {
-        return ch == '\t' || ch == ' ';
-    }
-    
-    /**
-     * Get matched text regions on line
-     *
-     * @param line      Target line
-     * @param positions Outputs start positions
-     */
-    private void computeMatchedPositions (int line, List<Integer> positions) {
-        positions.clear ();
-        CharSequence pattern = mSearcher.mSearchText;
-        if (pattern == null || pattern.length () == 0) {
-            return;
-        }
-        ContentLine seq = mText.getLine (line);
-        int index = 0;
-        while (index != -1) {
-            index = seq.indexOf (pattern, index);
-            if (index != -1) {
-                positions.add (index);
-                index += pattern.length ();
-            }
-        }
-    }
-    
-    /**
-     * Is inside the region
-     *
-     * @param index Index to test
-     * @param start Start of region
-     * @param end   End of region
-     * @param line  Checking line
-     * @return Whether cursor should be drawn in this row
-     */
-    private boolean isInside (int index, int start, int end, int line) {
-        // Due not to draw duplicate cursors for a single one
-        if (index == end && mText.getLine (line).length () != end) {
-            return false;
-        }
-        return index >= start && index <= end;
-    }
-    
-    /**
-     * Draw background of a text region
-     *
-     * @param canvas         Canvas to draw
-     * @param paintingOffset Paint offset x on canvas
-     * @param row            The row index
-     * @param firstVis       First visible character
-     * @param lastVis        Last visible character
-     * @param highlightStart Region start
-     * @param highlightEnd   Region end
-     * @param color          Color of background
-     */
-    private void drawRowRegionBackground (Canvas canvas, float paintingOffset, int row, int firstVis, int lastVis, int highlightStart, int highlightEnd, int color) {
-        int paintStart = Math.min (Math.max (firstVis, highlightStart), lastVis);
-        int paintEnd = Math.min (Math.max (firstVis, highlightEnd), lastVis);
-        if (paintStart != paintEnd) {
-            mRect.top = getRowTop (row) - getOffsetY ();
-            mRect.bottom = getRowBottom (row) - getOffsetY ();
-            mRect.left = paintingOffset + measureText (mBuffer, firstVis, paintStart - firstVis);
-            mRect.right = mRect.left + measureText (mBuffer, paintStart, paintEnd - paintStart);
-            drawColor (canvas, color, mRect);
-        }
-    }
-    
-    /**
-     * Draw text region with highlighting selected text
-     *
-     * @param canvas      Canvas to draw
-     * @param offsetX     Start paint offset x on canvas
-     * @param baseline    Baseline on canvas
-     * @param line        Drawing line index
-     * @param startIndex  Start index to paint
-     * @param endIndex    End index to paint
-     * @param columnCount Column count of line
-     * @param color       Color of normal text in this region
-     */
-    private void drawRegionText (Canvas canvas, float offsetX, float baseline, int line, int startIndex, int endIndex, int columnCount, int color) {
-        boolean hasSelectionOnLine = mCursor.isSelected () && line >= mCursor.getLeftLine () && line <= mCursor.getRightLine ();
-        int selectionStart = 0;
-        int selectionEnd = columnCount;
-        if (line == mCursor.getLeftLine ()) {
-            selectionStart = mCursor.getLeftColumn ();
-        }
-        if (line == mCursor.getRightLine ()) {
-            selectionEnd = mCursor.getRightColumn ();
-        }
-        mPaint.setColor (color);
-        if (hasSelectionOnLine) {
-            if (endIndex <= selectionStart || startIndex >= selectionEnd) {
-                drawText (canvas, mBuffer, startIndex, endIndex - startIndex, offsetX, baseline);
-            } else {
-                if (startIndex <= selectionStart) {
-                    if (endIndex >= selectionEnd) {
-                        //Three regions
-                        //startIndex - selectionStart
-                        drawText (canvas, mBuffer, startIndex, selectionStart - startIndex, offsetX, baseline);
-                        float deltaX = measureText (mBuffer, startIndex, selectionStart - startIndex);
-                        //selectionStart - selectionEnd
-                        mPaint.setColor (mColors.getColor (EditorColorScheme.TEXT_SELECTED));
-                        drawText (canvas, mBuffer, selectionStart, selectionEnd - selectionStart, offsetX + deltaX, baseline);
-                        deltaX += measureText (mBuffer, selectionStart, selectionEnd - selectionStart);
-                        //selectionEnd - endIndex
-                        mPaint.setColor (color);
-                        drawText (canvas, mBuffer, selectionEnd, endIndex - selectionEnd, offsetX + deltaX, baseline);
-                    } else {
-                        //Two regions
-                        //startIndex - selectionStart
-                        drawText (canvas, mBuffer, startIndex, selectionStart - startIndex, offsetX, baseline);
-                        //selectionStart - endIndex
-                        mPaint.setColor (mColors.getColor (EditorColorScheme.TEXT_SELECTED));
-                        drawText (canvas, mBuffer, selectionStart, endIndex - selectionStart, offsetX + measureText (mBuffer, startIndex, selectionStart - startIndex), baseline);
-                    }
-                } else {
-                    //selectionEnd > startIndex > selectionStart
-                    if (endIndex > selectionEnd) {
-                        //Two regions
-                        //selectionEnd - endIndex
-                        drawText (canvas, mBuffer, selectionEnd, endIndex - selectionEnd, offsetX + measureText (mBuffer, startIndex, selectionEnd - startIndex), baseline);
-                        //startIndex - selectionEnd
-                        mPaint.setColor (mColors.getColor (EditorColorScheme.TEXT_SELECTED));
-                        drawText (canvas, mBuffer, startIndex, selectionEnd - startIndex, offsetX, baseline);
-                    } else {
-                        //One region
-                        mPaint.setColor (mColors.getColor (EditorColorScheme.TEXT_SELECTED));
-                        drawText (canvas, mBuffer, startIndex, endIndex - startIndex, offsetX, baseline);
-                    }
-                }
-            }
-        } else {
-            drawText (canvas, mBuffer, startIndex, endIndex - startIndex, offsetX, baseline);
-        }
-    }
-    
-    /**
-     * Draw effect of edges
-     *
-     * @param canvas The canvas to draw
-     */
-    private void drawEdgeEffect (Canvas canvas) {
-        boolean postDraw = false;
-        if (!mVerticalEdgeGlow.isFinished ()) {
-            boolean bottom = mEventHandler.topOrBottom;
-            if (bottom) {
-                canvas.save ();
-                canvas.translate (-getMeasuredWidth (), getMeasuredHeight ());
-                canvas.rotate (180, getMeasuredWidth (), 0);
-            }
-            postDraw = mVerticalEdgeGlow.draw (canvas);
-            if (bottom) {
-                canvas.restore ();
-            }
-        }
-        if (isWordwrap ()) {
-            mHorizontalGlow.finish ();
-        }
-        if (!mHorizontalGlow.isFinished ()) {
-            canvas.save ();
-            boolean right = mEventHandler.leftOrRight;
-            if (right) {
-                canvas.rotate (90);
-                canvas.translate (0, -getMeasuredWidth ());
-            } else {
-                canvas.translate (0, getMeasuredHeight ());
-                canvas.rotate (-90);
-            }
-            postDraw = mHorizontalGlow.draw (canvas) || postDraw;
-            canvas.restore ();
-        }
-        OverScroller scroller = getScroller ();
-        if (scroller.isOverScrolled ()) {
-            if (mVerticalEdgeGlow.isFinished () && (scroller.getCurrY () < 0 || scroller.getCurrY () >= getScrollMaxY ())) {
-                mEventHandler.topOrBottom = scroller.getCurrY () >= getScrollMaxY ();
-                mVerticalEdgeGlow.onAbsorb ((int) scroller.getCurrVelocity ());
-                postDraw = true;
-            }
-            if (mHorizontalGlow.isFinished () && (scroller.getCurrX () < 0 || scroller.getCurrX () >= getScrollMaxX ())) {
-                mEventHandler.leftOrRight = scroller.getCurrX () >= getScrollMaxX ();
-                mHorizontalGlow.onAbsorb ((int) scroller.getCurrVelocity ());
-                postDraw = true;
-            }
-        }
-        if (postDraw) {
-            postInvalidate ();
-        }
-    }
-    
-    /**
-     * Draw a handle.
-     * The handle can be insert handle,left handle or right handle
-     *
-     * @param canvas     The Canvas to draw handle
-     * @param row        The row you want to attach handle to its bottom (Usually the selection line)
-     * @param centerX    Center x offset of handle
-     * @param resultRect The rect of handle this method drew
-     * @param handleType The selection handle type (LEFT, RIGHT,BOTH or -1)
-     */
-    private void drawHandle (Canvas canvas, int row, float centerX, RectF resultRect, int handleType) {
-        float radius = mDpUnit * 12;
-        
-        if (handleType > -1 && handleType == mEventHandler.getTouchedHandleType ()) {
-            radius = mDpUnit * 16;
-        }
-        
-        //Log.d("drawHandle", "drawHandle: " + mEventHandler.getTouchedHandleType());
-        float top = getRowBottom (row) - getOffsetY ();
-        float bottom = top + radius * 2;
-        float left = centerX - radius;
-        float right = centerX + radius;
-        if (right < 0 || left > getWidth () || bottom < 0 || top > getHeight ()) {
-            resultRect.setEmpty ();
-            return;
-        }
-        resultRect.left = left;
-        resultRect.right = right;
-        resultRect.top = top;
-        resultRect.bottom = bottom;
-        mPaint.setColor (mColors.getColor (EditorColorScheme.SELECTION_HANDLE));
-        canvas.drawCircle (centerX, (top + bottom) / 2, radius, mPaint);
-    }
-    
-    /**
-     * Draw scroll bars and tracks
-     *
-     * @param canvas The canvas to draw
-     */
-    private void drawScrollBars (Canvas canvas) {
-        mVerticalScrollBar.setEmpty ();
-        mHorizontalScrollBar.setEmpty ();
-        if (!mEventHandler.shouldDrawScrollBar ()) {
-            return;
-        }
-        if (isVerticalScrollBarEnabled () && getScrollMaxY () > getHeight () / 2) {
-            drawScrollBarTrackVertical (canvas);
-            drawScrollBarVertical (canvas);
-        }
-        if (isHorizontalScrollBarEnabled () && !isWordwrap () && getScrollMaxX () > getWidth () * 3 / 4) {
-            drawScrollBarTrackHorizontal (canvas);
-            drawScrollBarHorizontal (canvas);
-        }
-    }
-    
-    /**
-     * Draw vertical scroll bar track
-     *
-     * @param canvas Canvas to draw
-     */
-    private void drawScrollBarTrackVertical (Canvas canvas) {
-        if (mEventHandler.holdVerticalScrollBar ()) {
-            mRect.right = getWidth ();
-            mRect.left = getWidth () - mDpUnit * 10;
-            mRect.top = 0;
-            mRect.bottom = getHeight ();
-            drawColor (canvas, mColors.getColor (EditorColorScheme.SCROLL_BAR_TRACK), mRect);
-        }
-    }
-    
-    /**
-     * Draw vertical scroll bar
-     *
-     * @param canvas Canvas to draw
-     */
-    private void drawScrollBarVertical (Canvas canvas) {
-        int page = getHeight ();
-        float all = mLayout.getLayoutHeight () + getHeight () / 2f;
-        float length = page / all * getHeight ();
-        float topY;
-        if (length < mDpUnit * 30) {
-            length = mDpUnit * 30;
-            topY = (getOffsetY () + page / 2f) / all * (getHeight () - length);
-        } else {
-            topY = getOffsetY () / all * getHeight ();
-        }
-        if (mEventHandler.holdVerticalScrollBar ()) {
-            float centerY = topY + length / 2f;
-            drawLineInfoPanel (canvas, centerY, mRect.left - mDpUnit * 5);
-        }
-        mRect.right = getWidth ();
-        mRect.left = getWidth () - mDpUnit * 10;
-        mRect.top = topY;
-        mRect.bottom = topY + length;
-        mVerticalScrollBar.set (mRect);
-        drawColor (canvas, mColors.getColor (mEventHandler.holdVerticalScrollBar () ? EditorColorScheme.SCROLL_BAR_THUMB_PRESSED : EditorColorScheme.SCROLL_BAR_THUMB), mRect);
-    }
-    
-    /**
-     * Draw line number panel
-     *
-     * @param canvas  Canvas to draw
-     * @param centerY The center y on screen for the panel
-     * @param rightX  The right x on screen for the panel
-     */
-    private void drawLineInfoPanel (Canvas canvas, float centerY, float rightX) {
-        if (!mDisplayLnPanel) {
-            return;
-        }
-        String text = mLnTip + (1 + getFirstVisibleLine ());
-        float backupSize = mPaint.getTextSize ();
-        mPaint.setTextSize (getLineInfoTextSize ());
-        Paint.FontMetricsInt backupMetrics = mTextMetrics;
-        mTextMetrics = mPaint.getFontMetricsInt ();
-        float expand = mDpUnit * 3;
-        float textWidth = mPaint.measureText (text);
-        mRect.top = centerY - getRowHeight () / 2f - expand;
-        mRect.bottom = centerY + getRowHeight () / 2f + expand;
-        mRect.right = rightX;
-        mRect.left = rightX - expand * 2 - textWidth;
-        drawColor (canvas, mColors.getColor (EditorColorScheme.LINE_NUMBER_PANEL), mRect);
-        float baseline = centerY - getRowHeight () / 2f + getRowBaseline (0);
-        float centerX = (mRect.left + mRect.right) / 2;
-        mPaint.setColor (mColors.getColor (EditorColorScheme.LINE_NUMBER_PANEL_TEXT));
-        mPaint.setTextAlign (Paint.Align.CENTER);
-        canvas.drawText (text, centerX, baseline, mPaint);
-        mPaint.setTextAlign (Paint.Align.LEFT);
-        mPaint.setTextSize (backupSize);
-        mTextMetrics = backupMetrics;
-    }
-    
-    /**
-     * Draw horizontal scroll bar track
-     *
-     * @param canvas Canvas to draw
-     */
-    private void drawScrollBarTrackHorizontal (Canvas canvas) {
-        if (mEventHandler.holdHorizontalScrollBar ()) {
-            mRect.top = getHeight () - mDpUnit * 10;
-            mRect.bottom = getHeight ();
-            mRect.right = getWidth ();
-            mRect.left = 0;
-            drawColor (canvas, mColors.getColor (EditorColorScheme.SCROLL_BAR_TRACK), mRect);
-        }
-    }
-    
-    /**
-     * Draw horizontal scroll bar
-     *
-     * @param canvas Canvas to draw
-     */
-    private void drawScrollBarHorizontal (Canvas canvas) {
-        int page = getWidth ();
-        float all = getScrollMaxX () + getWidth ();
-        float length = page / all * getWidth ();
-        float leftX = getOffsetX () / all * getWidth ();
-        mRect.top = getHeight () - mDpUnit * 10;
-        mRect.bottom = getHeight ();
-        mRect.right = leftX + length;
-        mRect.left = leftX;
-        mHorizontalScrollBar.set (mRect);
-        drawColor (canvas, mColors.getColor (mEventHandler.holdHorizontalScrollBar () ? EditorColorScheme.SCROLL_BAR_THUMB_PRESSED : EditorColorScheme.SCROLL_BAR_THUMB), mRect);
-    }
-    
-    /**
-     * Draw cursor
-     */
-    private void drawCursor (Canvas canvas, float centerX, int row, RectF handle, boolean insert) {
-        if (!insert || mCursorBlink == null || mCursorBlink.visibility) {
-            mRect.top = getRowTop (row) - getOffsetY ();
-            mRect.bottom = getRowBottom (row) - getOffsetY ();
-            mRect.left = centerX - mInsertSelWidth / 2f;
-            mRect.right = centerX + mInsertSelWidth / 2f;
-            drawColor (canvas, mColors.getColor (EditorColorScheme.SELECTION_INSERT), mRect);
-        }
-        if (handle != null) {
-            drawHandle (canvas, row, centerX, handle, -1);
-        }
-    }
-    
-    /**
-     * Draw cursor
-     */
-    private void drawCursor (Canvas canvas, float centerX, int row, RectF handle, boolean insert, int handleType) {
-        if (!insert || mCursorBlink == null || mCursorBlink.visibility) {
-            mRect.top = getRowTop (row) - getOffsetY ();
-            mRect.bottom = getRowBottom (row) - getOffsetY ();
-            mRect.left = centerX - mInsertSelWidth / 2f;
-            mRect.right = centerX + mInsertSelWidth / 2f;
-            drawColor (canvas, mColors.getColor (EditorColorScheme.SELECTION_INSERT), mRect);
-        }
-        if (handle != null) {
-            drawHandle (canvas, row, centerX, handle, handleType);
-        }
-    }
-    
-    /**
-     * Get the color of EdgeEffect
-     *
-     * @return The color of EdgeEffect.
-     */
-    public int getEdgeEffectColor () {
-        return mVerticalEdgeGlow.getColor ();
-    }
-    
-    /**
-     * Set the color of EdgeEffect
-     *
-     * @param color The color of EdgeEffect
-     */
-    public void setEdgeEffectColor (int color) {
-        mVerticalEdgeGlow.setColor (color);
-        mHorizontalGlow.setColor (color);
-    }
-    
-    /**
-     * Get EdgeEffect for vertical direction
-     *
-     * @return EdgeEffect
-     */
-    protected MaterialEdgeEffect getVerticalEdgeEffect () {
-        return mVerticalEdgeGlow;
-    }
-    
-    /**
-     * Get EdgeEffect for horizontal direction
-     *
-     * @return EdgeEffect
-     */
-    protected MaterialEdgeEffect getHorizontalEdgeEffect () {
-        return mHorizontalGlow;
-    }
-    
-    /**
-     * Find the smallest code block that cursor is in
-     *
-     * @return The smallest code block index.
-     * If cursor is not in any code block,just -1.
-     */
-    private int findCursorBlock () {
-        List<BlockLine> blocks = mSpanner == null ? null : mSpanner.getResult ().getBlocks ();
-        if (blocks == null || blocks.isEmpty ()) {
-            return -1;
-        }
-        return findCursorBlock (blocks);
-    }
-    
-    /**
-     * Find the cursor code block internal
-     *
-     * @param blocks Current code blocks
-     * @return The smallest code block index.
-     * If cursor is not in any code block,just -1.
-     */
-    private int findCursorBlock (List<BlockLine> blocks) {
-        int line = mCursor.getLeftLine ();
-        int min = binarySearchEndBlock (line, blocks);
-        int max = blocks.size () - 1;
-        int minDis = Integer.MAX_VALUE;
-        int found = -1;
-        int invalidCount = 0;
-        int maxCount = Integer.MAX_VALUE;
-        if (mSpanner != null) {
-            TextAnalyzeResult result = mSpanner.getResult ();
-            if (result != null) {
-                maxCount = result.getSuppressSwitch ();
-            }
-        }
-        for (int i = min; i <= max; i++) {
-            BlockLine block = blocks.get (i);
-            if (block.endLine >= line && block.startLine <= line) {
-                int dis = block.endLine - block.startLine;
-                if (dis < minDis) {
-                    minDis = dis;
-                    found = i;
-                }
-            } else if (minDis != Integer.MAX_VALUE) {
-                invalidCount++;
-                if (invalidCount >= maxCount) {
-                    break;
-                }
-            }
-        }
-        return found;
-    }
-    
-    /**
-     * Find the first code block that maybe seen on screen
-     * Because the code blocks is sorted by its end line position
-     * we can use binary search to quicken this process in order to decrease
-     * the time we use on finding
-     *
-     * @param firstVis The first visible line
-     * @param blocks   Current code blocks
-     * @return The block we found.Always a valid index(Unless there is no block)
-     */
-    private int binarySearchEndBlock (int firstVis, List<BlockLine> blocks) {
-        //end > firstVis
-        int left = 0, right = blocks.size () - 1, mid, row;
-        int max = right;
-        while (left <= right) {
-            mid = (left + right) / 2;
-            if (mid < 0) {
-                return 0;
-            }
-            if (mid > max) {
-                return max;
-            }
-            row = blocks.get (mid).endLine;
-            if (row > firstVis) {
-                right = mid - 1;
-            } else if (row < firstVis) {
-                left = mid + 1;
-            } else {
-                left = mid;
-                break;
-            }
-        }
-        return Math.max (0, Math.min (left, max));
-    }
-    
-    /**
-     * Measure text width with editor's text paint
-     *
-     * @param src   Source characters array
-     * @param index Start index in array
-     * @param count Count of characters
-     * @return The width measured
-     */
-    private float measureText (char[] src, int index, int count) {
-        
-        // AndroidIDE does not allow tabs
-        // Due to Java Language Server
-
-//        int tabCount = 0;
-//        for (int i = 0; i < count; i++) {
-//            if (src[index + i] == '\t') {
-//                tabCount++;
-//            }
-//        }
-//        float extraWidth = mFontCache.measureChar(' ', mPaint) * getTabWidth() - mFontCache.measureChar('\t', mPaint);
-//        return mFontCache.measureText(src, index, index + count, mPaint) + tabCount * extraWidth;
-        
-        return mFontCache.measureText (src, index, index + count, mPaint);
-    }
-    
-    /**
-     * Measure text width with editor's text paint
-     *
-     * @param text  Source string
-     * @param index Start index in array
-     * @param count Count of characters
-     * @return The width measured
-     */
-    private float measureText (CharSequence text, int index, int count) {
-        int tabCount = 0;
-        for (int i = 0; i < count; i++) {
-            if (text.charAt (index + i) == '\t') {
-                tabCount++;
-            }
-        }
-        float extraWidth = mFontCache.measureChar (' ', mPaint) * getTabWidth () - mFontCache.measureChar ('\t', mPaint);
-        return mFontCache.measureText (text, index, index + count, mPaint) + tabCount * extraWidth;
-    }
-    
-    //private int counter;
-    
-    /**
-     * Draw text on the given position
-     *
-     * @param canvas Canvas to draw
-     * @param src    Source of characters
-     * @param index  The index in array
-     * @param count  Count of characters
-     * @param offX   Offset x for paint
-     * @param offY   Offset y for paint(baseline)
-     */
-    private void drawText (Canvas canvas, char[] src, int index, int count, float offX, float offY) {
-        //counter++;
-        int end = index + count;
-        int st = index;
-        if (mCharPaint) {
-            for (int i = index; i < end; i++) {
-                if (src[i] == '\t') {
-                    canvas.drawText (src, st, i - st, offX, offY, mPaint);
-                    offX = offX + measureText (src, st, i - st + 1);
-                    st = i + 1;
-                } else if (src[i] == '/') {
-                    canvas.drawText (src, st, i - st + 1, offX, offY, mPaint);
-                    offX = offX + measureText (src, st, i - st + 1);
-                    st = i + 1;
-                }
-            }
-        } else {
-            for (int i = index; i < end; i++) {
-                if (src[i] == '\t') {
-                    canvas.drawText (src, st, i - st, offX, offY, mPaint);
-                    offX = offX + measureText (src, st, i - st + 1);
-                    st = i + 1;
-                }
-            }
-        }
-        if (st < end) {
-            canvas.drawText (src, st, end - st, offX, offY, mPaint);
-        }
-    }
-    
-    /**
-     * Find first visible character
-     */
-    private float[] findFirstVisibleChar (float initialPosition, int left, int right, char[] chars) {
-        float width = 0f;
-        float target = mFontCache.measureChar (' ', mPaint) * getTabWidth () * 1.1f;
-        while (left < right && initialPosition + width < -target) {
-            float single = mFontCache.measureChar (chars[left], mPaint);
-            if (chars[left] == '\t') {
-                single = mFontCache.measureChar (' ', mPaint) * getTabWidth ();
-            }
-            width += single;
-            left++;
-        }
-        return new float[]{left, initialPosition + width};
-    }
-    
-    /**
-     * Read out characters to mChars for the given line
-     *
-     * @param line Line going to draw or measure
-     */
-    private void prepareLine (int line) {
-        int length = mText.getColumnCount (line);
-        if (length >= mBuffer.length) {
-            mBuffer = new char[length + 100];
-        }
-        mText.getLineChars (line, mBuffer);
-    }
-    
-    /**
-     * Draw background for row
-     */
-    private void drawRowBackground (Canvas canvas, int color, int row) {
-        mRect.top = getRowTop (row) - getOffsetY ();
-        mRect.bottom = getRowBottom (row) - getOffsetY ();
-        mRect.left = 0;
-        mRect.right = mViewRect.right;
-        drawColor (canvas, color, mRect);
-    }
-    
-    /**
-     * Draw single line number
-     */
-    private void drawLineNumber (Canvas canvas, int line, int row, float offsetX, float width, int color) {
-        if (width + offsetX <= 0) {
-            return;
-        }
-        if (mPaintOther.getTextAlign () != mLineNumberAlign) {
-            mPaintOther.setTextAlign (mLineNumberAlign);
-        }
-        
-        mPaintOther.setColor (color);
-        
-        // Line number center align to text center
-        float y = (getRowBottom (row) + getRowTop (row)) / 2f - (mLineNumberMetrics.descent - mLineNumberMetrics.ascent) / 2f - mLineNumberMetrics.ascent - getOffsetY ();
-        
-        // Avoid Integer#toString() calls
-        char[] text = mBuffer2;
-        int count = 0;
-        int copy = line + 1;
-        while (copy > 0) {
-            int digit = copy % 10;
-            text[count++] = (char) ('0' + digit);
-            copy /= 10;
-        }
-        for (int i = 0, j = count - 1; i < j; i++, j--) {
-            char tmp = text[i];
-            text[i] = text[j];
-            text[j] = tmp;
-        }
-        
-        switch (mLineNumberAlign) {
-            case LEFT:
-                canvas.drawText (text, 0, count, offsetX, y, mPaintOther);
-                break;
-            case RIGHT:
-                canvas.drawText (text, 0, count, offsetX + width, y, mPaintOther);
-                break;
-            case CENTER:
-                canvas.drawText (text, 0, count, offsetX + (width + mDividerMargin) / 2f, y, mPaintOther);
-        }
-    }
-    
-    /**
-     * Draw line number background
-     *
-     * @param canvas  Canvas to draw
-     * @param offsetX Start x of line number region
-     * @param width   Width of line number region
-     * @param color   Color of line number background
-     */
-    private void drawLineNumberBackground (Canvas canvas, float offsetX, float width, int color) {
-        float right = offsetX + width;
-        if (right < 0) {
-            return;
-        }
-        float left = Math.max (0f, offsetX);
-        mRect.bottom = getHeight ();
-        mRect.top = 0;
-        int offY = getOffsetY ();
-        if (offY < 0) {
-            mRect.bottom = mRect.bottom - offY;
-            mRect.top = mRect.top - offY;
-        }
-        mRect.left = left;
-        mRect.right = right;
-        
-        drawColor (canvas, color, mRect);
-    }
-    
-    /**
-     * Draw divider line
-     *
-     * @param canvas  Canvas to draw
-     * @param offsetX End x of line number region
-     * @param color   Color to draw divider
-     */
-    private void drawDivider (Canvas canvas, float offsetX, int color) {
-        float right = offsetX + mDividerWidth;
-        if (right < 0) {
-            return;
-        }
-        float left = Math.max (0f, offsetX);
-        mRect.bottom = getHeight ();
-        mRect.top = 0;
-        int offY = getOffsetY ();
-        if (offY < 0) {
-            mRect.bottom = mRect.bottom - offY;
-            mRect.top = mRect.top - offY;
-        }
-        mRect.left = left;
-        mRect.right = right;
-        drawColor (canvas, color, mRect);
-    }
-    
-    /**
-     * Get the width of line number region
-     *
-     * @return width of line number region
-     */
-    private float measureLineNumber () {
-        if (!isLineNumberEnabled ()) {
-            return 0f;
-        }
-        int count = 0;
-        int lineCount = getLineCount ();
-        while (lineCount > 0) {
-            count++;
-            lineCount /= 10;
-        }
-        final String[] charSet = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"};
-        float single = 0f;
-        for (String ch : charSet) {
-            single = Math.max (single, mPaintOther.measureText (ch));
-        }
-        return single * count;
-    }
-    
-    /**
-     * Create layout for text
-     */
-    void createLayout () {
-        if (mLayout != null) {
-            mLayout.destroyLayout ();
-        }
-        if (mWordwrap) {
-            mCachedLineNumberWidth = (int) measureLineNumber ();
-            mLayout = new WordwrapLayout (this, mText);
-        } else {
-            mLayout = new LineBreakLayout (this, mText);
-        }
-        if (mEventHandler != null) {
-            mEventHandler.scrollBy (0, 0);
-        }
-    }
-    
-    /**
-     * Draw rect on screen
-     * Will not do any thing if color is zero
-     *
-     * @param canvas Canvas to draw
-     * @param color  Color of rect
-     * @param rect   Rect to draw
-     */
-    private void drawColor (Canvas canvas, int color, RectF rect) {
-        if (color != 0) {
-            mPaint.setColor (color);
-            canvas.drawRect (rect, mPaint);
-        }
-    }
-    
-    /**
-     * Draw rect on screen
-     * Will not do any thing if color is zero
-     *
-     * @param canvas Canvas to draw
-     * @param color  Color of rect
-     * @param rect   Rect to draw
-     */
-    private void drawColor (Canvas canvas, int color, Rect rect) {
-        if (color != 0) {
-            mPaint.setColor (color);
-            canvas.drawRect (rect, mPaint);
-        }
-    }
-    
-    /**
-     * Commit a tab to cursor
-     */
-    public void commitTab () {
-        if (mConnection != null && isEditable ()) {
-            mConnection.commitTextInternal (Symbols.createTabSpaces (), true);
-        }
-    }
-    
-    
-    /**
-     * Whether span map is valid
-     */
-    private boolean isSpanMapPrepared (boolean insert, int delta) {
-        List<List<Span>> map = mSpanner.getResult ().getSpanMap ();
-        if (map != null) {
-            if (insert) {
-                return map.size () == getLineCount () - delta;
-            } else {
-                return map.size () == getLineCount () + delta;
-            }
-        } else {
-            return false;
-        }
-    }
-    
-    /**
-     * Exit select mode after text changed
-     */
-    private void exitSelectModeIfNeeded () {
-        if (!mCursor.isSelected ()) {
-            mTextActionPresenter.onExit ();
-        }
-    }
-    
-    /**
-     * Apply new position of auto completion window
-     */
-    private void updateCompletionWindowPosition () {
-        float panelX = updateCursorAnchor () + mDpUnit * 20;
-        float[] rightLayoutOffset = mLayout.getCharLayoutOffset (mCursor.getRightLine (), mCursor.getRightColumn ());
-        float panelY = rightLayoutOffset[0] - getOffsetY () + getRowHeight () / 2f;
-        float restY = getHeight () - panelY;
-        if (restY > mDpUnit * 200) {
-            restY = mDpUnit * 200;
-        } else if (restY < mDpUnit * 100) {
-            float offset = 0;
-            while (restY < mDpUnit * 100) {
-                restY += getRowHeight ();
-                panelY -= getRowHeight ();
-                offset += getRowHeight ();
-            }
-            getScroller ().startScroll (getOffsetX (), getOffsetY (), 0, (int) offset, 0);
-        }
-        mCompletionWindow.setExtendedX (panelX);
-        mCompletionWindow.setExtendedY (panelY);
-        if (getWidth () < 500 * mDpUnit) {
-            //Open center mode
-            mCompletionWindow.setWidth (getWidth () * 7 / 8);
-            mCompletionWindow.setExtendedX (getWidth () / 8f / 2f);
-        } else {
-            // Follow cursor mode
-            int w = getWidth () / 3;
-            mCompletionWindow.setWidth (w * 2);
-        }
-        if (!mCompletionWindow.isShowing ()) {
-            mCompletionWindow.setHeight ((int) restY);
-        }
-        mCompletionWindow.setMaxHeight ((int) restY);
-        mCompletionWindow.updatePosition ();
-    }
-    
-    /**
-     * Update the information of cursor
-     * Such as the position of cursor on screen(For input method that can go to any position on screen like PC input method)
-     *
-     * @return The offset x of right cursor on view
-     */
-    public float updateCursorAnchor () {
-        CursorAnchorInfo.Builder builder = mAnchorInfoBuilder;
-        
-        // No need to check for min sdk 21
-        builder.reset ();
-        mMatrix.set (getMatrix ());
-        int[] b = new int[2];
-        getLocationOnScreen (b);
-        mMatrix.postTranslate (b[0], b[1]);
-        builder.setMatrix (mMatrix);
-        builder.setSelectionRange (mCursor.getLeft (), mCursor.getRight ());
-        //
-        
-        int l = mCursor.getRightLine ();
-        int column = mCursor.getRightColumn ();
-        prepareLine (l);
-        boolean visible = true;
-        float x = measureTextRegionOffset ();
-        x = x + mLayout.getCharLayoutOffset (l, column)[1];
-        x = x - getOffsetX ();
-        if (x < 0) {
-            visible = false;
-            x = 0;
-        }
-        builder.setInsertionMarkerLocation (x, getRowTop (l) - getOffsetY (), getRowBaseline (l) - getOffsetY (), getRowBottom (l) - getOffsetY (), visible ? CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION : CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION);
-        mInputMethodManager.updateCursorAnchorInfo (this, builder.build ());
-        return x;
-    }
-    
-    /**
-     * @see #setLineInfoTextSize(float)
-     */
-    public float getLineInfoTextSize () {
-        return mLineInfoTextSize;
-    }
-    
-    /**
-     * Set text size for line info panel
-     *
-     * @param size Text size for line information, <strong>unit is SP</strong>
-     */
-    public void setLineInfoTextSize (float size) {
-        if (size <= 0) {
-            throw new IllegalArgumentException ();
-        }
-        mLineInfoTextSize = size;
-    }
-    
-    /**
-     * @see CodeEditor#setAutoCompletionOnComposing(boolean)
-     */
-    public boolean isAutoCompletionOnComposing () {
-        return mCompletionOnComposing;
-    }
-    
-    /**
-     * Specify whether show auto completion window even the input method is in composing state.
-     * <p>
-     * This is useful when the user uses an input method that does not support the attitude {@link EditorInfo#TYPE_TEXT_FLAG_NO_SUGGESTIONS}
-     * <p>
-     * Note:
-     * Composing texts are marked by an underline. When this switch is set to false, the editor
-     * will not provide auto completion when there is any composing text in editor.
-     * <p>
-     * This is enabled by default now
-     */
-    public void setAutoCompletionOnComposing (boolean completionOnComposing) {
-        mCompletionOnComposing = completionOnComposing;
-    }
-    
-    /**
-     * Specify whether we should provide any auto completion
-     * <p>
-     * If this is set to false, the completion window will never show and auto completion item
-     * provider will never be called.
-     */
-    public void setAutoCompletionEnabled (boolean autoCompletionEnabled) {
-        mAutoCompletionEnabled = autoCompletionEnabled;
-        if (!autoCompletionEnabled) {
-            mCompletionWindow.hide ();
-        }
-    }
-    /**
-     * @see CodeEditor#setAutoCompletionEnabled(boolean)
-     */
-    public boolean isAutoCompletionEnabled () {
-        return mAutoCompletionEnabled;
-    }
-    
-    /**
-     * Sets non-printable painting flags.
-     * Specify where they should be drawn.
-     * <p>
-     * Flags can be mixed.
-     *
-     * @param flags Flags
-     * @see #FLAG_DRAW_WHITESPACE_LEADING
-     * @see #FLAG_DRAW_WHITESPACE_INNER
-     * @see #FLAG_DRAW_WHITESPACE_TRAILING
-     * @see #FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE
-     * @see #FLAG_DRAW_LINE_SEPARATOR
-     */
-    public void setNonPrintablePaintingFlags (int flags) {
-        this.mNonPrintableOptions = flags;
-        invalidate ();
-    }
-    
-    /**
-     * @see #setNonPrintablePaintingFlags(int)
-     * @see #FLAG_DRAW_WHITESPACE_LEADING
-     * @see #FLAG_DRAW_WHITESPACE_INNER
-     * @see #FLAG_DRAW_WHITESPACE_TRAILING
-     * @see #FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE
-     * @see #FLAG_DRAW_LINE_SEPARATOR
-     */
-    public int getNonPrintableFlags () {
-        return mNonPrintableOptions;
-    }
-    
-    public void goToEnd () {
-        final int line = getText ().getLineCount () - 1;
-        setSelection (line, 0, true);
-    }
-    
-    /**
-     * Make the selection visible
-     */
-    public void ensureSelectionVisible () {
-        ensurePositionVisible (getCursor ().getRightLine (), getCursor ().getRightColumn ());
-    }
-    
-    /**
-     * Make the given character position visible
-     *
-     * @param line   Line of char
-     * @param column Column of char
-     */
-    public void ensurePositionVisible (int line, int column) {
-        float[] layoutOffset = mLayout.getCharLayoutOffset (line, column);
-        // x offset is the left of character
-        float xOffset = layoutOffset[1] + measureTextRegionOffset ();
-        // y offset is the bottom of row
-        float yOffset = layoutOffset[0];
-        
-        float targetY = getOffsetY ();
-        float targetX = getOffsetX ();
-        
-        if (yOffset - getRowHeight () < getOffsetY ()) {
-            //top invisible
-            targetY = yOffset - getRowHeight () * 1.1f;
-        }
-        if (yOffset > getHeight () + getOffsetY ()) {
-            //bottom invisible
-            targetY = yOffset - getHeight () + getRowHeight () * 0.1f;
-        }
-        float charWidth = column == 0 ? 0 : measureText (mText.getLine (line), column - 1, 1);
-        if (xOffset < getOffsetX ()) {
-            targetX = xOffset - charWidth * 0.2f;
-        }
-        if (xOffset + charWidth > getOffsetX () + getWidth ()) {
-            targetX = xOffset + charWidth * 0.8f - getWidth ();
-        }
-        
-        targetX = Math.max (0, Math.min (getScrollMaxX (), targetX));
-        targetY = Math.max (0, Math.min (getScrollMaxY (), targetY));
-        
-        if (targetY == getOffsetY () && targetX == getOffsetX ()) {
-            invalidate ();
-            return;
-        }
-        
-        boolean animation = true;
-        if (System.currentTimeMillis () - mLastMakeVisible < 100) {
-            animation = false;
-        }
-        mLastMakeVisible = System.currentTimeMillis ();
-        if (animation) {
-            getScroller ().forceFinished (true);
-            getScroller ().startScroll (getOffsetX (), getOffsetY (), (int) (targetX - getOffsetX ()), (int) (targetY - getOffsetY ()));
-            if (Math.abs (getOffsetY () - targetY) > mDpUnit * 100) {
-                mEventHandler.notifyScrolled ();
-            }
-        } else {
-            getScroller ().startScroll (getOffsetX (), getOffsetY (), (int) (targetX - getOffsetX ()), (int) (targetY - getOffsetY ()), 0);
-        }
-        
-        invalidate ();
-    }
-    
-    /**
-     * Whether there is clip
-     *
-     * @return whether clip in clip board
-     */
-    public boolean hasClip () {
-        return mClipboardManager.hasPrimaryClip ();
-    }
-    
-    /**
-     * Get 1dp = ?px
-     *
-     * @return 1dp in pixel
-     */
-    protected float getDpUnit () {
-        return mDpUnit;
-    }
-    
-    /**
-     * Get scroller from EventHandler
-     * You would better not use it for your own scrolling
-     *
-     * @return The scroller
-     */
-    public OverScroller getScroller () {
-        return mEventHandler.getScroller ();
-    }
-    
-    /**
-     * Whether the position is over max Y position
-     *
-     * @param posOnScreen Y position on view
-     * @return Whether over max Y
-     */
-    public boolean isOverMaxY (float posOnScreen) {
-        return posOnScreen + getOffsetY () > mLayout.getLayoutHeight ();
-    }
-    
-    /**
-     * Determine character position using positions in scroll coordinate
-     *
-     * @param xOffset Horizontal position in scroll coordinate
-     * @param yOffset Vertical position in scroll coordinate
-     * @return IntPair. first is line and second is column
-     * @see IntPair
-     */
-    public long getPointPosition (float xOffset, float yOffset) {
-        return mLayout.getCharPositionForLayoutOffset (xOffset - measureTextRegionOffset (), yOffset);
-    }
-    
-    public float[] getCursorPosition () {
-        return mLayout.getCharLayoutOffset (getCursor ().getLeftLine (), getCursor ().getLeftColumn ());
-    }
-    
-    /**
-     * Determine character position using positions on view
-     *
-     * @param x X on view
-     * @param y Y on view
-     * @return IntPair. first is line and second is column
-     * @see IntPair
-     */
-    public long getPointPositionOnScreen (float x, float y) {
-        return getPointPosition (x + getOffsetX (), y + getOffsetY ());
-    }
-    
-    /**
-     * Get max scroll y
-     *
-     * @return max scroll y
-     */
-    public int getScrollMaxY () {
-        return Math.max (0, mLayout.getLayoutHeight () - getHeight () / 2);
-    }
-    
-    /**
-     * Get max scroll x
-     *
-     * @return max scroll x
-     */
-    public int getScrollMaxX () {
-        return (int) Math.max (0, mLayout.getLayoutWidth () + measureTextRegionOffset () - getWidth () / 2f);
-    }
-    
-    /**
-     * @see CodeEditor#setHighlightSelectedText(boolean)
-     */
-    public boolean isHighlightSelectedText () {
-        return mHighlightSelectedText;
-    }
-    
-    /**
-     * Use color {@link EditorColorScheme#TEXT_SELECTED} to draw selected text
-     * instead of color specified by its span
-     */
-    public void setHighlightSelectedText (boolean highlightSelected) {
-        mHighlightSelectedText = highlightSelected;
-        invalidate ();
-    }
-    
-    /**
-     * Get EditorSearcher
-     *
-     * @return EditorSearcher
-     */
-    public EditorSearcher getSearcher () {
-        return mSearcher;
-    }
-    
-    /**
-     * Set selection around the given position
-     * It will try to set selection as near as possible (Exactly the position if that position exists)
-     */
-    protected void setSelectionAround (int line, int column) {
-        if (line < getLineCount ()) {
-            int columnCount = mText.getColumnCount (line);
-            if (column > columnCount) {
-                column = columnCount;
-            }
-            setSelection (line, column);
-        } else {
-            setSelection (getLineCount () - 1, mText.getColumnCount (getLineCount () - 1));
-        }
-    }
-    
-    /**
-     * Format text Async
-     *
-     * @return Whether the format task is scheduled
-     */
-    public synchronized boolean formatCodeAsync () {
-        if (mFormatThread != null || (mListener != null && mListener.onRequestFormat (this, true))) {
-            return false;
-        }
-        mFormatThread = new FormatThread (mText, mLanguage, this);
-        mFormatThread.start ();
-        return true;
-    }
-    
-    /**
-     * Get tab width
-     *
-     * @return tab width
-     */
-    public int getTabWidth () {
-        return mTabWidth;
-    }
-    
-    /**
-     * Set tab width
-     *
-     * @param w tab width compared to space
-     */
-    public void setTabWidth (int w) {
-        if (w < 1) {
-            throw new IllegalArgumentException ("width can not be under 1");
-        }
-        mTabWidth = w;
-        if (mCursor != null) {
-            mCursor.setTabWidth (mTabWidth);
-        }
-    }
-    
-    /**
-     * Set max and min text size that can be used by user zooming.
-     * <p>
-     * Unit is px.
-     */
-    public void setScaleTextSizes (float minSize, float maxSize) {
-        if (minSize > maxSize) {
-            throw new IllegalArgumentException ("min size can not be bigger than max size");
-        }
-        if (minSize < 2f) {
-            throw new IllegalArgumentException ("min size must be at least 2px");
-        }
-        mEventHandler.minSize = minSize;
-        mEventHandler.maxSize = maxSize;
-    }
-    
-    /**
-     * @see CodeEditor#setInputType(int)
-     */
-    public int getInputType () {
-        return mInputType;
-    }
-    
-    /**
-     * Specify input type for the editor
-     * <p>
-     * Zero for default input type
-     *
-     * @see EditorInfo#inputType
-     */
-    public void setInputType (int inputType) {
-        mInputType = inputType;
-    }
-    
-    /**
-     * Undo last action
-     */
-    public void undo () {
-        mText.undo ();
-    }
-    
-    /**
-     * Redo last action
-     */
-    public void redo () {
-        mText.redo ();
-    }
-    
-    /**
-     * Whether can undo
-     *
-     * @return whether can undo
-     */
-    public boolean canUndo () {
-        return mText.canUndo ();
-    }
-    
-    /**
-     * Whether can redo
-     *
-     * @return whether can redo
-     */
-    public boolean canRedo () {
-        return mText.canRedo ();
-    }
-    
-    /**
-     * @return Enabled/Disabled
-     * @see CodeEditor#setUndoEnabled(boolean)
-     */
-    public boolean isUndoEnabled () {
-        return mUndoEnabled;
-    }
-    
-    /**
-     * Enable / disabled undo manager
-     *
-     * @param enabled Enable/Disable
-     */
-    public void setUndoEnabled (boolean enabled) {
-        mUndoEnabled = enabled;
-        if (mText != null) {
-            mText.setUndoEnabled (enabled);
-        }
-    }
-    
-    /**
-     * @return Whether drag
-     * @see CodeEditor#setDrag(boolean)
-     */
-    public boolean isDrag () {
-        return mDrag;
-    }
-    
-    /**
-     * Set whether drag mode
-     * drag:no fling scroll
-     *
-     * @param drag Whether drag
-     */
-    public void setDrag (boolean drag) {
-        mDrag = drag;
-        if (drag && !mEventHandler.getScroller ().isFinished ()) {
-            mEventHandler.getScroller ().forceFinished (true);
-        }
-    }
-    
-    /**
-     * @see CodeEditor#setOverScrollEnabled(boolean)
-     */
-    public boolean isOverScrollEnabled () {
-        return mOverScrollEnabled;
-    }
-    
-    /**
-     * Whether over scroll is permitted.
-     * When over scroll is enabled, the user will be able to scroll out of displaying
-     * bounds if the user scroll fast enough.
-     * This is implemented by {@link OverScroller#fling(int, int, int, int, int, int, int, int, int, int)}
-     */
-    public void setOverScrollEnabled (boolean overScrollEnabled) {
-        mOverScrollEnabled = overScrollEnabled;
-    }
-    
-    /**
-     * Start search action mode
-     */
-    public void beginSearchMode () {
-        class SearchActionMode implements ActionMode.Callback {
-            
-            @SuppressLint("RestrictedApi")
-            @Override
-            public boolean onCreateActionMode (ActionMode mode, Menu menu) {
-                mStartedActionMode = ACTION_MODE_SEARCH_TEXT;
-                if (menu instanceof MenuBuilder) {
-                    MenuBuilder builder = (MenuBuilder) menu;
-                    builder.setOptionalIconsVisible (true);
-                }
-                menu.add (0, 1, 0, R.string.last)
-                        .setIcon (R.drawable.ic_search_last)
-                        .setShowAsActionFlags (MenuItem.SHOW_AS_ACTION_IF_ROOM);
-                menu.add (0, 0, 0, R.string.next)
-                        .setIcon (R.drawable.ic_search_next)
-                        .setShowAsActionFlags (MenuItem.SHOW_AS_ACTION_IF_ROOM);
-                menu.add (0, 2, 0, R.string.replace)
-                        .setIcon (R.drawable.ic_search_replace)
-                        .setShowAsActionFlags (MenuItem.SHOW_AS_ACTION_IF_ROOM);
-                SearchView sv = new SearchView (getContext ());
-                sv.setOnQueryTextListener (new SearchView.OnQueryTextListener () {
-                    
-                    @Override
-                    public boolean onQueryTextSubmit (String text) {
-                        getSearcher ().gotoNext ();
-                        return false;
-                    }
-                    
-                    @Override
-                    public boolean onQueryTextChange (String text) {
-                        getSearcher ().search (text);
-                        return false;
-                    }
-                    
-                });
-                mode.setCustomView (sv);
-                sv.performClick ();
-                sv.setQueryHint (getContext ().getString (R.string.text_to_search));
-                sv.setIconifiedByDefault (false);
-                sv.setIconified (false);
-                return true;
-            }
-            
-            @Override
-            public boolean onPrepareActionMode (ActionMode p1, Menu p2) {
-                return true;
-            }
-            
-            @Override
-            public boolean onActionItemClicked (final ActionMode am, MenuItem p2) {
-                switch (p2.getItemId ()) {
-                    case 1:
-                        getSearcher ().gotoLast ();
-                        break;
-                    case 0:
-                        getSearcher ().gotoNext ();
-                        break;
-                    case 2:
-                        final LayoutDialogTextInputBinding binding = LayoutDialogTextInputBinding.inflate (LayoutInflater.from (getContext ()));
-                        binding.name.setHint (R.string.replacement);
-                        binding.name.setStartIconDrawable (R.drawable.ic_replace);
-                        binding.name.setCounterEnabled (false);
-                        DialogUtils.newMaterialDialogBuilder (getContext ())
-                                .setTitle (R.string.replace)
-                                .setView (binding.getRoot ())
-                                .setNegativeButton (R.string.cancel, null)
-                                .setPositiveButton (R.string.replace, (dialog, which) -> {
-                                    getSearcher ().replaceThis (Objects.requireNonNull (binding.name.getEditText ()).getText ().toString ());
-                                    am.finish ();
-                                    dialog.dismiss ();
-                                })
-                                .setNeutralButton (R.string.replaceAll, (dialog, which) -> {
-                                    getSearcher ().replaceAll (Objects.requireNonNull (binding.name.getEditText ()).getText ().toString ());
-                                    am.finish ();
-                                    dialog.dismiss ();
-                                })
-                                .show ();
-                        break;
-                }
-                return false;
-            }
-            
-            @Override
-            public void onDestroyActionMode (ActionMode p1) {
-                mStartedActionMode = ACTION_MODE_NONE;
-                getSearcher ().stopSearch ();
-            }
-            
-        }
-        ActionMode.Callback callback = new SearchActionMode ();
-        ((AppCompatActivity) getContext ()).startSupportActionMode (callback);
-    }
-    
-    public EditorTouchEventHandler getEventHandler () {
-        return mEventHandler;
-    }
-    
-    /**
-     * @return Margin of divider line
-     * @see CodeEditor#setDividerMargin(float)
-     */
-    public float getDividerMargin () {
-        return mDividerMargin;
-    }
-    
-    /**
-     * Set divider line's left and right margin
-     *
-     * @param dividerMargin Margin for divider line
-     */
-    public void setDividerMargin (float dividerMargin) {
-        if (dividerMargin < 0) {
-            throw new IllegalArgumentException ("margin can not be under zero");
-        }
-        this.mDividerMargin = dividerMargin;
-        invalidate ();
-    }
-    
-    /**
-     * @return Width of divider line
-     * @see CodeEditor#setDividerWidth(float)
-     */
-    public float getDividerWidth () {
-        return mDividerWidth;
-    }
-    
-    /**
-     * Set divider line's width
-     *
-     * @param dividerWidth Width of divider line
-     */
-    public void setDividerWidth (float dividerWidth) {
-        if (dividerWidth < 0) {
-            throw new IllegalArgumentException ("width can not be under zero");
-        }
-        this.mDividerWidth = dividerWidth;
-        invalidate ();
-    }
-    
-    /**
-     * @return Typeface of line number
-     * @see CodeEditor#setTypefaceLineNumber(Typeface)
-     */
-    public Typeface getTypefaceLineNumber () {
-        return mPaintOther.getTypeface ();
-    }
-    
-    /**
-     * Set line number's typeface
-     *
-     * @param typefaceLineNumber New typeface
-     */
-    public void setTypefaceLineNumber (Typeface typefaceLineNumber) {
-        if (typefaceLineNumber == null) {
-            typefaceLineNumber = Typeface.MONOSPACE;
-        }
-        mPaintOther.setTypeface (typefaceLineNumber);
-        mLineNumberMetrics = mPaintOther.getFontMetricsInt ();
-        invalidate ();
-    }
-    
-    /**
-     * @return Typeface of text
-     * @see CodeEditor#setTypefaceText(Typeface)
-     */
-    public Typeface getTypefaceText () {
-        return mPaint.getTypeface ();
-    }
-    
-    /**
-     * Set text's typeface
-     *
-     * @param typefaceText New typeface
-     */
-    public void setTypefaceText (Typeface typefaceText) {
-        if (typefaceText == null) {
-            typefaceText = Typeface.DEFAULT;
-        }
-        mPaint.setTypeface (typefaceText);
-        mFontCache.clearCache ();
-        mCharPaint = 2 * mPaint.measureText ("/") != mPaint.measureText ("//");
-        mTextMetrics = mPaint.getFontMetricsInt ();
-        createLayout ();
-        invalidate ();
-    }
-    
-    /**
-     * @return Line number align
-     * @see CodeEditor#setLineNumberAlign(Paint.Align)
-     */
-    public Paint.Align getLineNumberAlign () {
-        return mLineNumberAlign;
-    }
-    
-    /**
-     * Set line number align
-     *
-     * @param align Align for line number
-     */
-    public void setLineNumberAlign (Paint.Align align) {
-        if (align == null) {
-            align = Paint.Align.LEFT;
-        }
-        mLineNumberAlign = align;
-        invalidate ();
-    }
-    
-    /**
-     * Width for insert cursor
-     *
-     * @param width Cursor width
-     */
-    public void setCursorWidth (float width) {
-        if (width < 0) {
-            throw new IllegalArgumentException ("width can not be under zero");
-        }
-        mInsertSelWidth = width;
-        invalidate ();
-    }
-    
-    /**
-     * Get Cursor
-     * Internal method!
-     *
-     * @return Cursor of text
-     */
-    public Cursor getCursor () {
-        return mCursor;
-    }
-    
-    /**
-     * Get line count
-     *
-     * @return line count
-     */
-    public int getLineCount () {
-        return mText.getLineCount ();
-    }
-    
-    /**
-     * Get first visible line on screen
-     *
-     * @return first visible line
-     */
-    public int getFirstVisibleLine () {
-        return mLayout.getLineNumberForRow (getFirstVisibleRow ());
-    }
-    
-    /**
-     * Get first visible row on screen
-     *
-     * @return first visible row
-     */
-    public int getFirstVisibleRow () {
-        return Math.max (0, getOffsetY () / getRowHeight ());
-    }
-    
-    /**
-     * Get last visible row on screen
-     *
-     * @return last visible row
-     */
-    public int getLastVisibleRow () {
-        return Math.max (0, (getOffsetY () + getHeight ()) / getRowHeight ());
-    }
-    
-    /**
-     * Whether this row is visible on screen
-     *
-     * @param row Row to check
-     * @return Whether visible
-     */
-    public boolean isRowVisible (int row) {
-        return (getFirstVisibleRow () <= row && row <= getLastVisibleRow ());
-    }
-    
-    /**
-     * Get baseline directly
-     *
-     * @param row Row
-     * @return baseline y offset
-     */
-    public int getRowBaseline (int row) {
-        return getRowHeight () * (row + 1) - mTextMetrics.descent;
-    }
-    
-    /**
-     * Get row height
-     *
-     * @return height of single row
-     */
-    public int getRowHeight () {
-        return mTextMetrics.descent - mTextMetrics.ascent;
-    }
-    
-    /**
-     * Get row top y offset
-     *
-     * @param row Row
-     * @return top y offset
-     */
-    public int getRowTop (int row) {
-        return getRowHeight () * row;
-    }
-    
-    /**
-     * Get row bottom y offset
-     *
-     * @param row Row
-     * @return Bottom y offset
-     */
-    public int getRowBottom (int row) {
-        return getRowHeight () * (row + 1);
-    }
-    
-    /**
-     * Get scroll x
-     *
-     * @return scroll x
-     */
-    public int getOffsetX () {
-        return mEventHandler.getScroller ().getCurrX ();
-    }
-    
-    /**
-     * Get scroll y
-     *
-     * @return scroll y
-     */
-    public int getOffsetY () {
-        return mEventHandler.getScroller ().getCurrY ();
-    }
-    
-    /**
-     * @return Whether editable
-     * @see CodeEditor#setEditable(boolean)
-     */
-    public boolean isEditable () {
-        return mEditable;
-    }
-    
-    /**
-     * Set whether text can be edited
-     *
-     * @param editable Editable
-     */
-    public void setEditable (boolean editable) {
-        mEditable = editable;
-        if (!editable) {
-            hideSoftInput ();
-        }
-    }
-    
-    /**
-     * Allow scale text size by thumb
-     *
-     * @param scale Whether allow
-     */
-    public void setScalable (boolean scale) {
-        mScalable = scale;
-    }
-    
-    /**
-     * @return Whether allow to scale
-     * @see CodeEditor#setScalable(boolean)
-     */
-    public boolean isScalable () {
-        return mScalable;
-    }
-    
-    public void setBlockLineEnabled (boolean enabled) {
-        mBlockLineEnabled = enabled;
-        invalidate ();
-    }
-    
-    public boolean isBlockLineEnabled () {
-        return mBlockLineEnabled;
-    }
-    
-    /**
-     * Get the target cursor to move when shift is pressed
-     */
-    private CharPosition getSelectingTarget () {
-        if (mCursor.left ().equals (mLockedSelection)) {
-            return mCursor.right ();
-        } else {
-            return mCursor.left ();
-        }
-    }
-    
-    /**
-     * Make sure the moving selection is visible
-     */
-    private void ensureSelectingTargetVisible () {
-        if (mCursor.left ().equals (mLockedSelection)) {
-            // Ensure right selection vivible
-            ensureSelectionVisible ();
-        } else {
-            ensurePositionVisible (mCursor.getLeftLine (), mCursor.getLeftColumn ());
-        }
-    }
-    
-    /**
-     * Move the selection down
-     * If the auto complete panel is shown,move the selection in panel to next
-     */
-    public void moveSelectionDown () {
-        if (mLockedSelection == null) {
-            if (mCompletionWindow.isShowing ()) {
-                mCompletionWindow.moveDown ();
-                return;
-            }
-            long pos = mCursor.getDownOf (IntPair.pack (mCursor.getLeftLine (), mCursor.getLeftColumn ()));
-            setSelection (IntPair.getFirst (pos), IntPair.getSecond (pos));
-        } else {
-            mCompletionWindow.hide ();
-            hideDiagnosticWindow ();
-            hideDiagnosticWindow ();
-            long pos = mCursor.getDownOf (getSelectingTarget ().toIntPair ());
-            setSelectionRegion (mLockedSelection.line, mLockedSelection.column, IntPair.getFirst (pos), IntPair.getSecond (pos), false);
-            ensureSelectingTargetVisible ();
-        }
-    }
-    
-    /**
-     * Move the selection up
-     * If Auto complete panel is shown,move the selection in panel to last
-     */
-    public void moveSelectionUp () {
-        hideDiagnosticWindow ();
-        if (mLockedSelection == null) {
-            if (mCompletionWindow.isShowing ()) {
-                mCompletionWindow.moveUp ();
-                return;
-            }
-            long pos = mCursor.getUpOf (IntPair.pack (mCursor.getLeftLine (), mCursor.getLeftColumn ()));
-            setSelection (IntPair.getFirst (pos), IntPair.getSecond (pos));
-        } else {
-            mCompletionWindow.hide ();
-            long pos = mCursor.getUpOf (getSelectingTarget ().toIntPair ());
-            setSelectionRegion (mLockedSelection.line, mLockedSelection.column, IntPair.getFirst (pos), IntPair.getSecond (pos), false);
-            ensureSelectingTargetVisible ();
-        }
-    }
-    
-    /**
-     * Move the selection left
-     */
-    public void moveSelectionLeft () {
-        hideDiagnosticWindow ();
-        if (mLockedSelection == null) {
-            Cursor c = getCursor ();
-            int line = c.getLeftLine ();
-            int column = c.getLeftColumn ();
-            long pos = mCursor.getLeftOf (IntPair.pack (line, column));
-            int lineAfter = IntPair.getFirst (pos);
-            int columnAfter = IntPair.getSecond (pos);
-            setSelection (lineAfter, columnAfter);
-            if (line == lineAfter) {
-                int toLeft = column - columnAfter;
-                if (mCompletionWindow.isShowing ()) {
-                    String prefix = mCompletionWindow.getPrefix ();
-                    if (prefix.length () > toLeft) {
-                        prefix = prefix.substring (0, prefix.length () - toLeft);
-                        mCompletionWindow.setPrefix (prefix);
-                    } else {
-                        mCompletionWindow.hide ();
-                    }
-                }
-                if (column - 1 <= 0) {
-                    mCompletionWindow.hide ();
-                }
-            }
-        } else {
-            mCompletionWindow.hide ();
-            long pos = mCursor.getLeftOf (getSelectingTarget ().toIntPair ());
-            setSelectionRegion (mLockedSelection.line, mLockedSelection.column, IntPair.getFirst (pos), IntPair.getSecond (pos), false);
-            ensureSelectingTargetVisible ();
-        }
-    }
-    
-    /**
-     * Move the selection right
-     */
-    public void moveSelectionRight () {
-        hideDiagnosticWindow ();
-        if (mLockedSelection == null) {
-            Cursor c = getCursor ();
-            int line = c.getLeftLine ();
-            int column = c.getLeftColumn ();
-            int c_column = getText ().getColumnCount (line);
-            long pos = mCursor.getRightOf (IntPair.pack (line, column));
-            int lineAfter = IntPair.getFirst (pos);
-            int columnAfter = IntPair.getSecond (pos);
-            setSelection (lineAfter, columnAfter);
-            if (line == lineAfter) {
-                char ch = (columnAfter - 1 < c_column && columnAfter - 1 >= 0) ? mText.charAt (lineAfter, columnAfter - 1) : '\0';
-                if (!isEmoji (ch) && mCompletionWindow.isShowing ()) {
-                    if (!mLanguage.isAutoCompleteChar (ch)) {
-                        mCompletionWindow.hide ();
-                    } else {
-                        String prefix = mCompletionWindow.getPrefix () + ch;
-                        mCompletionWindow.setPrefix (prefix);
-                    }
-                }
-            }
-        } else {
-            mCompletionWindow.hide ();
-            hideDiagnosticWindow ();
-            long pos = mCursor.getRightOf (getSelectingTarget ().toIntPair ());
-            setSelectionRegion (mLockedSelection.line, mLockedSelection.column, IntPair.getFirst (pos), IntPair.getSecond (pos), false);
-            ensureSelectingTargetVisible ();
-        }
-    }
-    
-    /**
-     * Move selection to end of line
-     */
-    public void moveSelectionEnd () {
-        if (mLockedSelection == null) {
-            int line = mCursor.getLeftLine ();
-            setSelection (line, getText ().getColumnCount (line));
-        } else {
-            int line = getSelectingTarget ().line;
-            setSelectionRegion (mLockedSelection.line, mLockedSelection.column, line, getText ().getColumnCount (line), false);
-            ensureSelectingTargetVisible ();
-        }
-    }
-    
-    /**
-     * Move selection to start of line
-     */
-    public void moveSelectionHome () {
-        if (mLockedSelection == null) {
-            setSelection (mCursor.getLeftLine (), 0);
-        } else {
-            setSelectionRegion (mLockedSelection.line, mLockedSelection.column, getSelectingTarget ().line, 0, false);
-            ensureSelectingTargetVisible ();
-        }
-    }
-    
-    /**
-     * Move selection to given position
-     *
-     * @param line   The line to move
-     * @param column The column to move
-     */
-    public void setSelection (int line, int column) {
-        setSelection (line, column, true);
-    }
-    
-    /**
-     * Move selection to given position
-     *
-     * @param line          The line to move
-     * @param column        The column to move
-     * @param makeItVisible Make the character visible
-     */
-    public void setSelection (int line, int column, boolean makeItVisible) {
-        if (column > 0 && isEmoji (mText.charAt (line, column - 1))) {
-            column++;
-            if (column > mText.getColumnCount (line)) {
-                column--;
-            }
-        }
-        mCursor.set (line, column);
-        if (mHighlightCurrentBlock) {
-            mCursorPosition = findCursorBlock ();
-        }
-        updateCursor ();
-        if (makeItVisible) {
-            ensurePositionVisible (line, column);
-        } else {
-            invalidate ();
-        }
-        mCursorBlink.onSelectionChanged ();
-        if (mTextActionPresenter != null) {
-            mTextActionPresenter.onExit ();
-        }
-        
-        showOrHideDiagnosticWindow ();
-        
-        if (mLanguageClient != null) {
-            mLanguageClient.hideSignatureHelp ();
-            mLanguageClient.showDiagnosticAtBottom (getFile (), getEditorLanguage ().getAnalyzer ().findDiagnosticContaining (getCursor ().getLeftLine (), getCursor ().getLeftColumn ()), this);
-        }
-        
-        if (mListener != null) {
-            Cursor c = getCursor ();
-            mListener.onSetSelection (c.getLeftLine (), c.getLeftColumn (), c.getRightLine (), c.getRightColumn ());
-        }
-    }
-    
-    /**
-     * Select all text
-     */
-    public void selectAll () {
-        setSelectionRegion (0, 0, getLineCount () - 1, getText ().getColumnCount (getLineCount () - 1));
-    }
-    
-    /**
-     * Set selection to the given range.
-     * @param range The range to select.
-     */
-    public void setSelection (Range range) {
-        setSelectionRegion (range.getStart ().getLine (),
-                range.getStart ().getColumn (),
-                range.getEnd ().getLine (),
-                range.getEnd ().getColumn ());
-    }
-    
-    /**
-     * Set selection region with a call to {@link CodeEditor#ensureSelectionVisible()}
-     *
-     * @param lineLeft    Line left
-     * @param columnLeft  Column Left
-     * @param lineRight   Line right
-     * @param columnRight Column right
-     */
-    public void setSelectionRegion (int lineLeft, int columnLeft, int lineRight, int columnRight) {
-        setSelectionRegion (lineLeft, columnLeft, lineRight, columnRight, true);
-    }
-    
-    /**
-     * Set selection region
-     *
-     * @param lineLeft         Line left
-     * @param columnLeft       Column Left
-     * @param lineRight        Line right
-     * @param columnRight      Column right
-     * @param makeRightVisible Whether make right cursor visible
-     */
-    public void setSelectionRegion (int lineLeft, int columnLeft, int lineRight, int columnRight, boolean makeRightVisible) {
-        int start = getText ().getCharIndex (lineLeft, columnLeft);
-        int end = getText ().getCharIndex (lineRight, columnRight);
-        
-        if (start > end) {
-            setSelectionRegion (lineRight, columnRight, lineLeft, columnLeft, makeRightVisible);
-            return;
-        }
-        boolean lastState = mCursor.isSelected ();
-        if (columnLeft > 0) {
-            int column = columnLeft - 1;
-            char ch = mText.charAt (lineLeft, column);
-            if (isEmoji (ch)) {
-                columnLeft++;
-                if (columnLeft > mText.getColumnCount (lineLeft)) {
-                    columnLeft--;
-                }
-            }
-        }
-        if (columnRight > 0) {
-            int column = columnRight;
-            char ch = mText.charAt (lineRight, column);
-            if (isEmoji (ch)) {
-                columnRight++;
-                if (columnRight > mText.getColumnCount (lineRight)) {
-                    columnRight--;
-                }
-            }
-        }
-        mCursor.setLeft (lineLeft, columnLeft);
-        mCursor.setRight (lineRight, columnRight);
-        updateCursor ();
-        mCompletionWindow.hide ();
-        hideDiagnosticWindow ();
-        if (makeRightVisible) {
-            ensurePositionVisible (lineRight, columnRight);
-        } else {
-            invalidate ();
-        }
-        mCursorBlink.onSelectionChanged ();
-        // Removed mCursor.isSelected() so we can start action mode
-        if (!lastState /* && mCursor.isSelected() */ && mStartedActionMode != ACTION_MODE_SEARCH_TEXT) {
-            mTextActionPresenter.onBeginTextSelect ();
-        }
-        mEventHandler.notifyTouchedSelectionHandlerLater ();
-        showOrHideDiagnosticWindow ();
-        
-        if (mListener != null) {
-            Cursor c = getCursor ();
-            mListener.onSetSelection (c.getLeftLine (), c.getLeftColumn (), c.getRightLine (), c.getRightColumn ());
-        }
-    }
-    
-    /**
-     * Move to next page
-     */
-    public void movePageDown () {
-        mEventHandler.onScroll (null, null, 0, getHeight ());
-        mCompletionWindow.hide ();
-        hideDiagnosticWindow ();
-    }
-    
-    /**
-     * Move to previous page
-     */
-    public void movePageUp () {
-        mEventHandler.onScroll (null, null, 0, -getHeight ());
-        mCompletionWindow.hide ();
-        hideDiagnosticWindow ();
-    }
-    
-    /**
-     * Paste text from clip board
-     */
-    public void pasteText () {
-        try {
-            if (!mClipboardManager.hasPrimaryClip () || mClipboardManager.getPrimaryClip () == null) {
-                return;
-            }
-            ClipData.Item data = mClipboardManager.getPrimaryClip ().getItemAt (0);
-            CharSequence text = data.getText ();
-            if (text != null && mConnection != null) {
-                mConnection.commitText (text, 0);
-            }
-            notifyExternalCursorChange ();
-        } catch (Exception e) {
-            e.printStackTrace ();
-            Toast.makeText (getContext (), e.toString (), Toast.LENGTH_SHORT).show ();
-        }
-    }
-    
-    /**
-     * Copy text to clip board
-     */
-    public void copyText () {
-        try {
-            if (mCursor.isSelected ()) {
-                String clip = getText ().subContent (mCursor.getLeftLine (),
-                        mCursor.getLeftColumn (),
-                        mCursor.getRightLine (),
-                        mCursor.getRightColumn ()).toString ();
-                mClipboardManager.setPrimaryClip (ClipData.newPlainText (clip, clip));
-            }
-        } catch (Exception e) {
-            e.printStackTrace ();
-            Toast.makeText (getContext (), e.toString (), Toast.LENGTH_SHORT).show ();
-        }
-    }
-    
-    /**
-     * Copy text to clipboard and delete them
-     */
-    public void cutText () {
-        copyText ();
-        if (mCursor.isSelected ()) {
-            mCursor.onDeleteKeyPressed ();
-            notifyExternalCursorChange ();
-        }
-    }
-    
-    /**
-     * @return Text displaying, the result is read-only. You should not make changes to this object as it is used internally
-     * @see CodeEditor#setText(CharSequence)
-     */
-    @NonNull
-    public Content getText () {
-        return mText;
-    }
-    
-    /**
-     * Sets the text to be displayed.
-     *
-     * @param text the new text you want to display
-     */
-    public void setText (@Nullable CharSequence text) {
-        if (text == null) {
-            text = "";
-        }
-        
-        if (mText != null) {
-            mText.removeContentListener (this);
-            mText.setLineListener (null);
-        }
-        
-        // There should not be any tabs in the text
-        // This is needed for the JavaLanguageServer
-        String t = text.toString ();
-        t = t.replace ("\t", Symbols.createTabSpaces ());
-        
-        mText = new Content (this, t);
-        mCursor = mText.getCursor ();
-        mCursor.setAutoIndent (mAutoIndentEnabled);
-        mCursor.setLanguage (mLanguage);
-        mEventHandler.reset ();
-        mText.addContentListener (this);
-        mText.setUndoEnabled (mUndoEnabled);
-        mText.setLineListener (this);
-        
-        if (mSpanner != null) {
-            mSpanner.setCallback (null);
-            mSpanner.shutdown ();
-        }
-        mSpanner = new TextAnalyzer (mLanguage, mLanguageServer, getFile ());
-        mSpanner.setCallback (this);
-        
-        TextAnalyzeResult colors = mSpanner.getResult ();
-        colors.getSpanMap ().clear ();
-        mSpanner.analyze (getText ());
-        
-        requestLayout ();
-        
-        if (mListener != null) {
-            mListener.onNewTextSet (this);
-        }
-        
-        if (mInputMethodManager != null) {
-            mInputMethodManager.restartInput (this);
-        }
-        createLayout ();
-        invalidate ();
-    }
-    
-    /**
-     * Set the editor's text size in sp unit. This value must be > 0
-     *
-     * @param textSize the editor's text size in <strong>Sp</strong> units.
-     */
-    public void setTextSize (float textSize) {
-        Context context = getContext ();
-        Resources res;
-        
-        if (context == null) {
-            res = Resources.getSystem ();
-        } else {
-            res = context.getResources ();
-        }
-        
-        setTextSizePx (TypedValue.applyDimension (TypedValue.COMPLEX_UNIT_SP, textSize, res.getDisplayMetrics ()));
-    }
-    
-    /**
-     * Check whether line numbers are shown
-     *
-     * @return The state of line number displaying
-     */
-    public boolean isLineNumberEnabled () {
-        return mLineNumberEnabled;
-    }
-    
-    /**
-     * Set whether we should display line numbers
-     *
-     * @param lineNumberEnabled The state of line number displaying
-     */
-    public void setLineNumberEnabled (boolean lineNumberEnabled) {
-        if (lineNumberEnabled != mLineNumberEnabled && isWordwrap ()) {
-            createLayout ();
-        }
-        mLineNumberEnabled = lineNumberEnabled;
-        invalidate ();
-    }
-    
-    /**
-     * Get the paint of the editor
-     * You should not change text size and other attributes that are related to text measuring by the object
-     *
-     * @return The paint which is used by the editor now
-     */
-    @NonNull
-    public Paint getTextPaint () {
-        return mPaint;
-    }
-    
-    /**
-     * Get the ColorScheme object of this editor
-     * You can config colors of some regions, texts and highlight text
-     *
-     * @return ColorScheme object using
-     */
-    @NonNull
-    public EditorColorScheme getColorScheme () {
-        return mColors;
-    }
-    
-    /**
-     * Set a new color scheme for editor.
-     * <p>
-     * It can be a subclass of {@link EditorColorScheme}.
-     * The scheme object can only be applied to one editor instance.
-     * Otherwise, an IllegalStateException is thrown.
-     *
-     * @param colors A non-null and free EditorColorScheme
-     */
-    public void setColorScheme (@NonNull EditorColorScheme colors) {
-        colors.setOnColorUpdateListener (this::onColorUpdated);
-        mColors = colors;
-        if (mCompletionWindow != null) {
-            mCompletionWindow.applyColorScheme ();
-        }
-        invalidate ();
-    }
-    
-    /**
-     * Move selection to line start with scrolling
-     *
-     * @param line Line to jump
-     */
-    public void jumpToLine (int line) {
-        setSelection (line, 0);
-    }
-    
-    /**
-     * Get analyze result.
-     * <strong>Do not make changes to it or read concurrently</strong>
-     */
-    @NonNull
-    public TextAnalyzeResult getTextAnalyzeResult () {
-        return mSpanner.getResult ();
-    }
-    
-    /**
-     * Hide auto complete window if shown
-     */
-    public void hideAutoCompleteWindow () {
-        if (mCompletionWindow != null) {
-            mCompletionWindow.hide ();
-        }
-    }
-    
-    public void hideDiagnosticWindow () {
-        if (mLanguageClient != null) {
-            mLanguageClient.hideDiagnostics ();
-        }
-    }
-    
-    /**
-     * Get cursor code block index
-     *
-     * @return index of cursor's code block
-     */
-    public int getBlockIndex () {
-        return mCursorPosition;
-    }
-    
-    
-    //-------------------------------------------------------------------------------
-    //-------------------------IME Interaction---------------------------------------
-    //-------------------------------------------------------------------------------
-    
-    /**
-     * Display soft input method for self
-     */
-    public void showSoftInput () {
-        if (isEditable () && isEnabled ()) {
-            if (isInTouchMode ()) {
-                requestFocusFromTouch ();
-            }
-            if (!hasFocus ()) {
-                requestFocus ();
-            }
-            mInputMethodManager.showSoftInput (this, 0);
-        }
-        invalidate ();
-    }
-    
-    /**
-     * Hide soft input
-     */
-    public void hideSoftInput () {
-        mInputMethodManager.hideSoftInputFromWindow (getWindowToken (), 0);
-    }
-    
-    /**
-     * Send current selection position to input method
-     */
-    protected void updateSelection () {
-        int candidatesStart = -1, candidatesEnd = -1;
-        if (mConnection.mComposingLine != -1) {
-            try {
-                candidatesStart = mText.getCharIndex (mConnection.mComposingLine, mConnection.mComposingStart);
-                candidatesEnd = mText.getCharIndex (mConnection.mComposingLine, mConnection.mComposingEnd);
-            } catch (IndexOutOfBoundsException e) {
-                //Ignored
-            }
-        }
-        //Logs.log("Send selection changes: candidate(start = " + candidatesStart + ", end =" + candidatesEnd + " ) cursor(left = " + mCursor.getLeft() + ", right =" + mCursor.getRight() + ")");
-        mInputMethodManager.updateSelection (this, mCursor.getLeft (), mCursor.getRight (), candidatesStart, candidatesEnd);
-    }
-    
-    /**
-     * Update request result for monitoring request
-     */
-    protected void updateExtractedText () {
-        if (mExtracting != null) {
-            //Logs.log("Send extracted text updates");
-            mInputMethodManager.updateExtractedText (this, mExtracting.token, extractText (mExtracting));
-        }
-    }
-    
-    /**
-     * Set request needed to update when editor updates selection
-     */
-    protected void setExtracting (@Nullable ExtractedTextRequest request) {
-        mExtracting = request;
-        
-    }
-    
-    /**
-     * Extract text in editor for input method
-     */
-    protected ExtractedText extractText (@NonNull ExtractedTextRequest request) {
-        Cursor cur = getCursor ();
-        ExtractedText text = new ExtractedText ();
-        int selBegin = cur.getLeft ();
-        int selEnd = cur.getRight ();
-        int startOffset;
-        if (request.hintMaxChars == 0) {
-            request.hintMaxChars = EditorInputConnection.TEXT_LENGTH_LIMIT;
-        }
-        
-        startOffset = 0;
-        
-        text.text = mConnection.getTextRegion (startOffset, startOffset + request.hintMaxChars, request.flags);
-        text.startOffset = startOffset;
-        text.selectionStart = selBegin - startOffset;
-        text.selectionEnd = selEnd - startOffset;
-        if (selBegin != selEnd) {
-            text.flags |= ExtractedText.FLAG_SELECTING;
-        }
-        return text;
-    }
-    
-    /**
-     * Notify input method that text has been changed for external reason
-     */
-    protected void notifyExternalCursorChange () {
-        //Logs.log("Call cursorChangeExternal()");
-        updateExtractedText ();
-        updateSelection ();
-        updateCursorAnchor ();
-        // Restart if composing
-        if (mConnection.mComposingLine != -1) {
-            restartInput ();
-        }
-    }
-    
-    protected void restartInput () {
-        mConnection.invalid ();
-        mInputMethodManager.restartInput (this);
-    }
-    
-    /**
-     * Send cursor position in text and on screen to input method
-     */
-    protected void updateCursor () {
-        updateCursorAnchor ();
-        updateExtractedText ();
-        if (!mText.isInBatchEdit ()) {
-            updateSelection ();
-        }
-    }
-    
-    //-------------------------------------------------------------------------------
-    //------------------------Internal Callbacks-------------------------------------
-    //-------------------------------------------------------------------------------
-    
-    /**
-     * Called by ColorScheme to notify invalidate
-     *
-     * @param type Color type changed
-     */
-    protected void onColorUpdated (int type) {
-        if (type == EditorColorScheme.AUTO_COMP_PANEL_BG || type == EditorColorScheme.AUTO_COMP_PANEL_CORNER) {
-            if (mCompletionWindow != null) {
-                mCompletionWindow.applyColorScheme ();
-            }
-            return;
-        }
-        invalidate ();
-    }
-    
-    /**
-     * Get using InputMethodManager
-     */
-    protected InputMethodManager getInputMethodManager () {
-        return mInputMethodManager;
-    }
-    
-    /**
-     * Called by CodeEditorInputConnection
-     */
-    protected void onCloseConnection () {
-        setExtracting (null);
-        invalidate ();
-    }
-    
-    //-------------------------------------------------------------------------------
-    //-------------------------Override methods--------------------------------------
-    //-------------------------------------------------------------------------------
-    
-    @Override
-    protected void onDraw (Canvas canvas) {
-        super.onDraw (canvas);
-        drawView (canvas);
-    }
-    
-    @Override
-    public AccessibilityNodeInfo createAccessibilityNodeInfo () {
-        AccessibilityNodeInfo node = super.createAccessibilityNodeInfo ();
-        node.setEditable (isEditable ());
-        node.setTextSelection (mCursor.getLeft (), mCursor.getRight ());
-        node.setScrollable (true);
-        node.setInputType (InputType.TYPE_CLASS_TEXT);
-        node.setMultiLine (true);
-        node.setText (getText ().toStringBuilder ());
-        node.setLongClickable (true);
-        node.addAction (AccessibilityNodeInfo.AccessibilityAction.ACTION_COPY);
-        node.addAction (AccessibilityNodeInfo.AccessibilityAction.ACTION_CUT);
-        node.addAction (AccessibilityNodeInfo.AccessibilityAction.ACTION_PASTE);
-        node.addAction (AccessibilityNodeInfo.AccessibilityAction.ACTION_SET_TEXT);
-        node.addAction (AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD);
-        node.addAction (AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD);
-        return node;
-    }
-    
-    @Override
-    public boolean performAccessibilityAction (int action, Bundle arguments) {
-        switch (action) {
-            case AccessibilityNodeInfo.ACTION_COPY:
-                copyText ();
-                return true;
-            case AccessibilityNodeInfo.ACTION_CUT:
-                cutText ();
-                return true;
-            case AccessibilityNodeInfo.ACTION_PASTE:
-                pasteText ();
-                return true;
-            case AccessibilityNodeInfo.ACTION_SET_TEXT:
-                setText (arguments.getCharSequence (AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE));
-                return true;
-            case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD:
-                movePageDown ();
-                return true;
-            case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD:
-                movePageUp ();
-                return true;
-        }
-        return super.performAccessibilityAction (action, arguments);
-    }
-    
-    @Override
-    public boolean onCheckIsTextEditor () {
-        return isEnabled () && isEditable ();
-    }
-    
-    @Override
-    public InputConnection onCreateInputConnection (EditorInfo outAttrs) {
-        if (!isEditable () || !isEnabled ()) {
-            return null;
-        }
-        outAttrs.inputType = mInputType != 0 ? mInputType : EditorInfo.TYPE_CLASS_TEXT
-                | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE
-                | EditorInfo.TYPE_TEXT_FLAG_NO_SUGGESTIONS
-                | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
-        
-        outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI | EditorInfo.IME_FLAG_NO_FULLSCREEN;
-        
-        outAttrs.initialSelStart = getCursor () != null ? getCursor ().getLeft () : 0;
-        outAttrs.initialSelEnd = getCursor () != null ? getCursor ().getRight () : 0;
-        outAttrs.initialCapsMode = mConnection.getCursorCapsMode (0);
-        mConnection.reset ();
-        setExtracting (null);
-        return mConnection;
-    }
-    
-    @SuppressLint("ClickableViewAccessibility")
-    @Override
-    public boolean onTouchEvent (MotionEvent event) {
-        if (!isEnabled ()) {
-            return false;
-        }
-        boolean handlingBefore = mEventHandler.handlingMotions ();
-        boolean res = mEventHandler.onTouchEvent (event);
-        boolean handling = mEventHandler.handlingMotions ();
-        boolean res2 = false;
-        boolean res3 = false;
-        if (!handling && !handlingBefore) {
-            res2 = mBasicDetector.onTouchEvent (event);
-            res3 = mScaleDetector.onTouchEvent (event);
-        }
-        if (event.getAction () == MotionEvent.ACTION_UP) {
-            mVerticalEdgeGlow.onRelease ();
-            mHorizontalGlow.onRelease ();
-        }
-        return (res3 || res2 || res);
-    }
-    
-    @Override
-    public boolean onKeyDown (int keyCode, KeyEvent event) {
-        mKeyMetaStates.onKeyDown (event);
-        boolean isShiftPressed = mKeyMetaStates.isShiftPressed ();
-        switch (keyCode) {
-            case KeyEvent.KEYCODE_DPAD_DOWN:
-            case KeyEvent.KEYCODE_DPAD_UP:
-            case KeyEvent.KEYCODE_DPAD_LEFT:
-            case KeyEvent.KEYCODE_DPAD_RIGHT:
-            case KeyEvent.KEYCODE_MOVE_HOME:
-            case KeyEvent.KEYCODE_MOVE_END:
-                if (isShiftPressed && (!mCursor.isSelected ())) {
-                    mLockedSelection = mCursor.left ();
-                } else if (!isShiftPressed && mLockedSelection != null) {
-                    mLockedSelection = null;
-                }
-                mKeyMetaStates.adjust ();
-        }
-        switch (keyCode) {
-            case KeyEvent.KEYCODE_BACK: {
-                return mTextActionPresenter != null && mTextActionPresenter.onExit ();
-            }
-            case KeyEvent.KEYCODE_DEL:
-                if (isEditable ()) {
-                    mCursor.onDeleteKeyPressed ();
-                    notifyExternalCursorChange ();
-                }
-                return true;
-            case KeyEvent.KEYCODE_FORWARD_DEL: {
-                if (isEditable ()) {
-                    mConnection.deleteSurroundingText (0, 1);
-                    notifyExternalCursorChange ();
-                }
-                return true;
-            }
-            case KeyEvent.KEYCODE_ENTER: {
-                if (isEditable ()) {
-                    if (mCompletionWindow.isShowing ()) {
-                        mCompletionWindow.select ();
-                        return true;
-                    }
-                    NewlineHandler[] handlers = mLanguage.getNewlineHandlers ();
-                    if (handlers == null || getCursor ().isSelected ()) {
-                        mCursor.onCommitText ("\n", true);
-                    } else {
-                        ContentLine line = mText.getLine (mCursor.getLeftLine ());
-                        int index = mCursor.getLeftColumn ();
-                        String beforeText = line.subSequence (0, index).toString ();
-                        String afterText = line.subSequence (index, line.length ()).toString ();
-                        boolean consumed = false;
-                        for (NewlineHandler handler : handlers) {
-                            if (handler != null) {
-                                if (handler.matchesRequirement (beforeText, afterText, getCursor ().left ())) {
-                                    try {
-                                        NewlineHandler.HandleResult result = handler.handleNewline (beforeText, afterText, getTabWidth ());
-                                        if (result != null) {
-                                            mCursor.onCommitText (result.text, false);
-                                            int delta = result.shiftLeft;
-                                            if (delta != 0) {
-                                                int newSel = Math.max (getCursor ().getLeft () - delta, 0);
-                                                CharPosition charPosition = getCursor ().getIndexer ().getCharPosition (newSel);
-                                                setSelection (charPosition.line, charPosition.column);
-                                            }
-                                            consumed = true;
-                                        } else {
-                                            continue;
-                                        }
-                                    } catch (Exception e) {
-                                    }
-                                    break;
-                                }
-                            }
-                        }
-                        if (!consumed) {
-                            mCursor.onCommitText ("\n", true);
-                        }
-                    }
-                    notifyExternalCursorChange ();
-                }
-                return true;
-            }
-            case KeyEvent.KEYCODE_DPAD_DOWN:
-                moveSelectionDown ();
-                return true;
-            case KeyEvent.KEYCODE_DPAD_UP:
-                moveSelectionUp ();
-                return true;
-            case KeyEvent.KEYCODE_DPAD_LEFT:
-                moveSelectionLeft ();
-                return true;
-            case KeyEvent.KEYCODE_DPAD_RIGHT:
-                moveSelectionRight ();
-                return true;
-            case KeyEvent.KEYCODE_MOVE_END:
-                moveSelectionEnd ();
-                return true;
-            case KeyEvent.KEYCODE_MOVE_HOME:
-                moveSelectionHome ();
-                return true;
-            case KeyEvent.KEYCODE_PAGE_DOWN:
-                movePageDown ();
-                return true;
-            case KeyEvent.KEYCODE_PAGE_UP:
-                movePageUp ();
-                return true;
-            case KeyEvent.KEYCODE_TAB:
-                if (isEditable ()) {
-                    commitTab ();
-                }
-                return true;
-            case KeyEvent.KEYCODE_PASTE:
-                if (isEditable ()) {
-                    pasteText ();
-                }
-                return true;
-            case KeyEvent.KEYCODE_COPY:
-                copyText ();
-                return true;
-            case KeyEvent.KEYCODE_SPACE:
-                if (isEditable ()) {
-                    getCursor ().onCommitText (" ");
-                    notifyExternalCursorChange ();
-                }
-                return true;
-            default:
-                if (event.isCtrlPressed () && !event.isAltPressed ()) {
-                    switch (keyCode) {
-                        case KeyEvent.KEYCODE_V:
-                            if (isEditable ()) {
-                                pasteText ();
-                            }
-                            return true;
-                        case KeyEvent.KEYCODE_C:
-                            copyText ();
-                            return true;
-                        case KeyEvent.KEYCODE_X:
-                            if (isEditable ()) {
-                                cutText ();
-                            } else {
-                                copyText ();
-                            }
-                            return true;
-                        case KeyEvent.KEYCODE_A:
-                            selectAll ();
-                            return true;
-                        case KeyEvent.KEYCODE_Z:
-                            if (isEditable ()) {
-                                undo ();
-                            }
-                            return true;
-                        case KeyEvent.KEYCODE_Y:
-                            if (isEditable ()) {
-                                redo ();
-                            }
-                            return true;
-                    }
-                } else if (!event.isCtrlPressed () && !event.isAltPressed ()) {
-                    if (event.isPrintingKey () && isEditable ()) {
-                        String text = new String (Character.toChars (event.getUnicodeChar (event.getMetaState ())));
-                        SymbolPairMatch.Replacement replacement = null;
-                        if (text.length () == 1 && isSymbolCompletionEnabled ()) {
-                            replacement = mLanguageSymbolPairs.getCompletion (text.charAt (0));
-                        }
-                        if (replacement == null || replacement == SymbolPairMatch.Replacement.NO_REPLACEMENT) {
-                            getCursor ().onCommitText (text);
-                            notifyExternalCursorChange ();
-                        } else {
-                            getCursor ().onCommitText (replacement.text);
-                            int delta = (replacement.text.length () - replacement.selection);
-                            if (delta != 0) {
-                                int newSel = Math.max (getCursor ().getLeft () - delta, 0);
-                                CharPosition charPosition = getCursor ().getIndexer ().getCharPosition (newSel);
-                                setSelection (charPosition.line, charPosition.column);
-                                notifyExternalCursorChange ();
-                            }
-                        }
-                    } else {
-                        return super.onKeyDown (keyCode, event);
-                    }
-                    return true;
-                }
-        }
-        return super.onKeyDown (keyCode, event);
-    }
-    
-    @Override
-    public boolean onKeyUp (int keyCode, KeyEvent event) {
-        mKeyMetaStates.onKeyUp (event);
-        if (!mKeyMetaStates.isShiftPressed () && mLockedSelection != null && !mCursor.isSelected ()) {
-            mLockedSelection = null;
-        }
-        return super.onKeyUp (keyCode, event);
-    }
-    
-    @Override
-    protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec) {
-        boolean warn = false;
-        //Fill the horizontal layout if WRAP_CONTENT mode
-        if (MeasureSpec.getMode (widthMeasureSpec) == MeasureSpec.AT_MOST || MeasureSpec.getMode (widthMeasureSpec) == MeasureSpec.UNSPECIFIED) {
-            widthMeasureSpec = MeasureSpec.makeMeasureSpec (MeasureSpec.getSize (widthMeasureSpec), MeasureSpec.EXACTLY);
-            warn = true;
-        }
-        //Fill the vertical layout if WRAP_CONTENT mode
-        if (MeasureSpec.getMode (heightMeasureSpec) == MeasureSpec.AT_MOST || MeasureSpec.getMode (heightMeasureSpec) == MeasureSpec.UNSPECIFIED) {
-            heightMeasureSpec = MeasureSpec.makeMeasureSpec (MeasureSpec.getSize (heightMeasureSpec), MeasureSpec.EXACTLY);
-            warn = true;
-        }
-        
-        super.onMeasure (widthMeasureSpec, heightMeasureSpec);
-    }
-    
-    @Override
-    public boolean onGenericMotionEvent (MotionEvent event) {
-        if (event.getAction () == MotionEvent.ACTION_SCROLL) {
-            float v_scroll = -event.getAxisValue (MotionEvent.AXIS_VSCROLL);
-            if (v_scroll != 0) {
-                mEventHandler.onScroll (event, event, 0, v_scroll * 20);
-            }
-            return true;
-        }
-        return super.onGenericMotionEvent (event);
-    }
-    
-    @Override
-    protected void onSizeChanged (int w, int h, int oldWidth, int oldHeight) {
-        super.onSizeChanged (w, h, oldWidth, oldHeight);
-        mViewRect.right = w;
-        mViewRect.bottom = h;
-        getVerticalEdgeEffect ().setSize (w, h);
-        getHorizontalEdgeEffect ().setSize (h, w);
-        getVerticalEdgeEffect ().finish ();
-        getHorizontalEdgeEffect ().finish ();
-        if (isWordwrap () && w != oldWidth) {
-            createLayout ();
-        } else {
-            mEventHandler.scrollBy (getOffsetX () > getScrollMaxX () ? getScrollMaxX () - getOffsetX () : 0, getOffsetY () > getScrollMaxY () ? getScrollMaxY () - getOffsetY () : 0);
-        }
-    }
-    
-    @Override
-    protected void onAttachedToWindow () {
-        super.onAttachedToWindow ();
-        mCursorBlink.valid = mCursorBlink.period > 0;
-        if (mCursorBlink.valid) {
-            post (mCursorBlink);
-        }
-    }
-    
-    @Override
-    protected void onDetachedFromWindow () {
-        super.onDetachedFromWindow ();
-        mCursorBlink.valid = false;
-        removeCallbacks (mCursorBlink);
-    }
-    
-    @Override
-    public void computeScroll () {
-        if (mEventHandler.getScroller ().computeScrollOffset ()) {
-            invalidate ();
-        }
-        super.computeScroll ();
-    }
-    
-    @Override
-    public void beforeReplace (Content content) {
-        mWait = true;
-        mLayout.beforeReplace (content);
-        if (mListener != null) {
-            mListener.beforeReplace (this, content);
-        }
-    }
-    
-    public void commentLine () {
-        if (getFile () == null) {
-            return;
-        }
-        
-        final Content text = getText ();
-        final String name = getFile ().getName ();
-        int line = getCursor ().getLeftLine ();
-        if (name.endsWith (".java") || name.endsWith (".gradle")) {
-            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
-                if (!text.getLineString (line).trim ().startsWith ("//")) {
-                    text.insert (line, 0, "//");
-                }
-                line++;
-            }
-        } else if (name.endsWith (".xml")) {
-            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
-                final String lineString = text.getLineString (line);
-                if (!lineString.trim ().startsWith ("<!--")
-                        && !lineString.trim ().endsWith ("-->")) {
-                    text.replace (line, 0, line, text.getColumnCount (line), "<!--".concat (lineString).concat ("-->"));
-                }
-                line++;
-            }
-        }
-    }
-    
-    public void uncommentLine () {
-        if (getFile () == null) {
-            return;
-        }
-        
-        final Content text = getText ();
-        final String name = getFile ().getName ();
-        int line = getCursor ().getLeftLine ();
-        if (name.endsWith (".java") || name.endsWith (".gradle")) {
-            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
-                String l = text.getLineString (line);
-                if (l.trim ().startsWith ("//")) {
-                    int i = l.indexOf ("//");
-                    text.delete (line, i, line, i + 2);
-                }
-                line++;
-            }
-        } else if (name.endsWith (".xml")) {
-            final String commentStart = "<!--";
-            final String commentEnd = "-->";
-            while (line >= getCursor ().getLeftLine () && line <= getCursor ().getRightLine ()) {
-                String l = text.getLineString (line);
-                if (l.trim ().startsWith (commentStart)) {
-                    int i = l.indexOf (commentStart);
-                    text.delete (line, i, line, i + commentStart.length ());
-                }
-                if (l.trim ().endsWith (commentEnd)) {
-                    int i = l.lastIndexOf (commentEnd);
-                    int count = text.getColumnCount (line);
-                    text.delete (line, count - commentEnd.length (), line, count);
-                }
-                line++;
-            }
-        }
-    }
-    
-    @SuppressWarnings ("deprecation")
-    public void findDefinition () {
-        if (getFile () == null) {
-            return;
-        }
-        
-        final ProgressDialog pd = ProgressDialog.show (getContext (), null, getContext ().getString (R.string.msg_finding_definition));
-        
-        try {
-            final CompletableFuture<DefinitionResult> future = CompletableFuture.supplyAsync (() -> {
-                final var provider = mLanguageServer.getDefinitionProvider ();
-                final var params = new com.itsaky.lsp.models.DefinitionParams (
-                        getFile ().toPath (),
-                        new com.itsaky.lsp.models.Position (
-                                getCursor ().getLeftLine (),
-                                getCursor ().getLeftColumn ()
-                        )
-                );
-                
-                return provider.findDefinitions (params);
-            });
-            
-            future.whenComplete ((result, error) -> {
-    
-                if (result == null
-                        || mLanguageClient == null
-                        || future.isCancelled ()
-                        || future.isCompletedExceptionally ()
-                ) {
-                    LOG.error ("An error occurred while finding definition", error);
-                    showDefinitionNotFound (pd);
-                    return;
-                }
-    
-                final var locations = result.getLocations ();
-                if (locations.size () <= 0) {
-                    LOG.error ("No definitions found", "Size:", locations.size ());
-                    showDefinitionNotFound (pd);
-                    return;
-                }
-    
-                ThreadUtils.runOnUiThread (() -> {
-                    if (locations.size () == 1) {
-                        var location = locations.get (0);
-                        mLanguageClient.showDocument (new com.itsaky.lsp.models.ShowDocumentParams (location.getFile (), location.getRange ()));
-                    } else {
-                        mLanguageClient.showLocations (locations);
-                    }
-                });
-    
-                dismissOnUiThread (pd);
-            });
-        } catch (Throwable th) {
-            LOG.error ("An error occurred while finding definition", th);
-            showDefinitionNotFound (pd);
-        }
-    }
-    
-    private void showDefinitionNotFound (final ProgressDialog pd) {
-        ThreadUtils.runOnUiThread (() -> {
-            toast (R.string.msg_no_definition, Toaster.Type.ERROR);
-            pd.dismiss ();
-        });
-    }
-    
-    public void findReferences () {
-        if (getFile () == null) {
-            return;
-        }
-    
-        @SuppressWarnings ("deprecation")
-        final ProgressDialog pd = ProgressDialog.show (getContext (), null, getContext ().getString (R.string.msg_finding_references));
-        
-        try {
-            final CompletableFuture<ReferenceResult> future = CompletableFuture.supplyAsync (() -> {
-                final var provider = mLanguageServer.getReferenceProvider ();
-                final var referenceParams = new ReferenceParams (
-                        getFile ().toPath (),
-                        new com.itsaky.lsp.models.Position (
-                                getCursor ().getLeftLine (),
-                                getCursor ().getLeftColumn ()),
-                        true);
-                return provider.findReferences (referenceParams);
-            });
-            
-            future.whenComplete ((result, error) -> {
-    
-                if (result == null
-                        || mLanguageClient == null
-                        || future.isCancelled ()
-                        || future.isCompletedExceptionally ()
-                ) {
-                    LOG.error ("An error occurred while finding references", error);
-                    showReferencesNotFound (pd);
-                    return;
-                }
-                
-                if (result.getLocations ().isEmpty ()) {
-                    showReferencesNotFound (pd);
-                    return;
-                } else {
-                    ThreadUtils.runOnUiThread (() -> {
-                        mLanguageClient.showLocations (result.getLocations ());
-                    });
-                }
-                
-                dismissOnUiThread (pd);
-            });
-        } catch (Throwable th) {
-            LOG.error ("An error occurred while finding references", th);
-            showReferencesNotFound (pd);
-        }
-    }
-    
-    private void showReferencesNotFound (final ProgressDialog pd) {
-        ThreadUtils.runOnUiThread (() -> {
-            toast (R.string.msg_no_references, Toaster.Type.ERROR);
-            pd.dismiss ();
-        });
-    }
-    
-    public void signatureHelp (String insertedContent) {
-        if (mLanguageServer != null && getFile () != null) {
-            final CompletableFuture<SignatureHelp> future = CompletableFuture.supplyAsync (() -> {
-                final var provider = mLanguageServer.getSignatureHelpProvider ();
-                return provider.provideSignatures (new SignatureHelpParams (getFile ().toPath (), new com.itsaky.lsp.models.Position (
-                        getCursor ().getLeftLine (),
-                        getCursor ().getLeftColumn ()
-                )));
-            });
-            
-            future.whenComplete ((help, error) -> {
-                if (help == null
-                        || mLanguageClient == null
-                        || future.isCancelled ()
-                        || future.isCompletedExceptionally ()
-                ) {
-                    LOG.error ("An error occurred while finding signature help", error);
-                    return;
-                }
-                
-                ThreadUtils.runOnUiThread (() -> {
-                    mLanguageClient.showSignatureHelp (help, getFile ());
-                });
-            });
-        }
-    }
-    
-    private void dismissOnUiThread (final Dialog dialog) {
-        ThreadUtils.runOnUiThread (dialog::dismiss);
-    }
-    
-    public void didSave () {
-        if (mLanguageServer != null && getFile () != null) {
-            mLanguageServer.getDocumentHandler ().onFileSaved (
-                    new DocumentSaveEvent (getFile ().toPath ())
-            );
-        }
-    }
-    
-    public void close () {
-        if (mLanguageServer != null && getFile () != null) {
-            mLanguageServer.getDocumentHandler ().onFileClosed (
-                    new DocumentCloseEvent (getFile ().toPath ())
-            );
-            LOG.info ("'textDocument/didClose' was sent to the language server.");
-        } else {
-            LOG.info ("No language server is available for this file");
-        }
-    }
-    
-    /**
-     * Request code actions from server at the given position containing given diagnostics
-     *
-     * @return A {@link CompletableFuture}. May return {@code null}.
-     */
-    public CompletableFuture<CodeActionResult> codeActions () {
-        return codeActions (getEditorLanguage ().getAnalyzer ().findDiagnosticsContainingLine (getCursor ().getLeftLine ()));
-    }
-    
-    public CompletableFuture<CodeActionResult> codeActions (List<DiagnosticItem> diagnostics) {
-        if (mLanguageServer == null || mLanguageClient == null) {
-            return null;
-        }
-        
-        return CompletableFuture.supplyAsync (() -> mLanguageServer.getCodeActionProvider ()
-            .codeActions (new CodeActionParams (
-                getFile ().toPath (),
-                getCursorRange (),
-                diagnostics
-        )));
-    }
-    
-    public void expandSelection () {
-        if (mLanguageServer == null || getFile () == null) {
-            LOG.error ("Cannot expand selection. Language server or file is null");
-            return;
-        }
-        
-        final var pd = ProgressDialog.show (getContext (), null, getContext ().getString (R.string.please_wait), true, false);
-        final CompletableFuture<Range> future = CompletableFuture.supplyAsync (() ->
-                mLanguageServer.getSelectionProvider ()
-                    .expandSelection (
-                            new ExpandSelectionParams (
-                                    getFile ().toPath (),
-                                    getCursorRange ()
-                            )
-                    )
-        );
-        
-        future.whenComplete (((range, throwable) -> {
-            
-            pd.dismiss ();
-            
-            if (throwable != null) {
-                LOG.error ("Error computing expanded selection range", throwable);
-                return;
-            }
-            
-            setSelection (range);
-        }));
-    }
-    
-    public Position getCursorAsLSPPosition () {
-        return new Position (getCursor ().getLeftLine (), getCursor ().getLeftColumn ());
-    }
-    
-    public Range getCursorRange () {
-        final Cursor cursor = getCursor ();
-        final Position start = new Position (cursor.getLeftLine (), cursor.getLeftColumn ());
-        final Position end = new Position (cursor.getRightLine (), cursor.getRightColumn ());
-        return new Range (start, end);
-    }
-    
-    private boolean isCursorInString () {
-        final int line = getCursor ().getLeftLine ();
-        final int column = getCursor ().getLeftColumn ();
-        
-        final Map<Integer, List<Range>> stringMap = mSpanner == null ? null : mSpanner.getResult ().getStringMap ();
-        if (stringMap == null || stringMap.isEmpty ()) {
-            return false;
-        }
-        
-        return isInRanges (stringMap.get (line), line, column);
-    }
-    
-    private boolean isCursorInComment () {
-        final int line = getCursor ().getLeftLine ();
-        final int column = getCursor ().getLeftColumn ();
-        
-        final Map<Integer, List<Range>> commentMap = mSpanner == null ? null : mSpanner.getResult ().getCommentMap ();
-        if (commentMap == null || commentMap.isEmpty ()) {
-            return false;
-        }
-        
-        return isInRanges (commentMap.get (line), line, column);
-    }
-    
-    private boolean isInRanges (List<Range> ranges, int line, int column) {
-        
-        if (ranges == null || ranges.isEmpty ()) {
-            return false;
-        }
-        
-        for (Range range : ranges) {
-            if (LSPUtils.isInRange (range, line, column)) {
-                return true;
-            }
-        }
-        
-        return false;
-    }
-    
-    private void toast (int msg, Toaster.Type type) {
-        StudioApp.getInstance ().toast (msg, type);
-    }
-    
-    private void toast (String msg, Toaster.Type type) {
-        StudioApp.getInstance ().toast (msg, type);
-    }
-    
-    @Override
-    public void afterInsert (Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
-        notifyChanged ();
-    
-        if (mLanguageClient != null) {
-            mLanguageClient.hideDiagnostics ();
-        }
-        
-        // Update spans
-        if (isSpanMapPrepared (true, endLine - startLine)) {
-            if (startLine == endLine) {
-                SpanMapUpdater.shiftSpansOnSingleLineInsert (mSpanner.getResult ().getSpanMap (), startLine, startColumn, endColumn);
-            } else {
-                SpanMapUpdater.shiftSpansOnMultiLineInsert (mSpanner.getResult ().getSpanMap (), startLine, startColumn, endLine, endColumn);
-            }
-        }
-        
-        mCursorBlink.onSelectionChanged ();
-        mLayout.afterInsert (content, startLine, startColumn, endLine, endColumn, insertedContent);
-        
-        // Notify input method
-        updateCursor ();
-        mWait = false;
-        // Visibility & State shift
-        exitSelectModeIfNeeded ();
-        
-        // Auto completion
-        // Trigger only when autocompletion is enabled and cursor is not in a string token
-        if (isAutoCompletionEnabled () && !(isCursorInString () || isCursorInComment ())) {
-            if ((mConnection.mComposingLine == -1 || mCompletionOnComposing) && endColumn != 0 && startLine == endLine) {
-                int end = endColumn;
-                while (endColumn > 0) {
-                    if (mLanguage.isAutoCompleteChar (content.charAt (endLine, endColumn - 1))) {
-                        endColumn--;
-                    } else {
-                        break;
-                    }
-                }
-                if (end > endColumn) {
-                    String line = content.getLineString (endLine);
-                    String prefix = line.substring (endColumn, end);
-                    mCompletionWindow.setPrefix (prefix);
-                } else {
-                    postHideCompletionWindow ();
-                }
-            } else {
-                postHideCompletionWindow ();
-            }
-            if (mCompletionWindow.isShowing ()) {
-                updateCompletionWindowPosition ();
-            }
-        } else {
-            mCompletionWindow.hide ();
-        }
-        
-        updateCursorAnchor ();
-        ensureSelectionVisible ();
-        // Notify to update highlight
-        mSpanner.analyze (mText);
-        mEventHandler.hideInsertHandle ();
-        
-        // Notify listener
-        if (mListener != null) {
-            mListener.afterInsert (this, mText, startLine, startColumn, endLine, endColumn, insertedContent);
-        }
-        
-        signatureHelp (insertedContent.toString ());
-    }
-    
-    @Override
-    public void afterDelete (Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
-        notifyChanged ();
-    
-        if (mLanguageClient != null) {
-            mLanguageClient.hideDiagnostics ();
-        }
-        
-        if (isSpanMapPrepared (false, endLine - startLine)) {
-            if (startLine == endLine) {
-                SpanMapUpdater.shiftSpansOnSingleLineDelete (mSpanner.getResult ().getSpanMap (), startLine, startColumn, endColumn);
-            } else {
-                SpanMapUpdater.shiftSpansOnMultiLineDelete (mSpanner.getResult ().getSpanMap (), startLine, startColumn, endLine, endColumn);
-            }
-        }
-        
-        mCursorBlink.onSelectionChanged ();
-        mLayout.afterDelete (content, startLine, startColumn, endLine, endColumn, deletedContent);
-        
-        updateCursor ();
-        exitSelectModeIfNeeded ();
-        
-        if (isAutoCompletionEnabled ()) {
-            if (mConnection.mComposingLine == -1 && mCompletionWindow.isShowing ()) {
-                if (startLine != endLine || startColumn != endColumn - 1) {
-                    postHideCompletionWindow ();
-                }
-                String prefix = mCompletionWindow.getPrefix ();
-                if (prefix == null || prefix.length () - 1 <= 0) {
-                    postHideCompletionWindow ();
-                } else {
-                    prefix = prefix.substring (0, prefix.length () - 1);
-                    updateCompletionWindowPosition ();
-                    mCompletionWindow.setPrefix (prefix);
-                }
-            }
-        } else {
-            mCompletionWindow.hide ();
-        }
-        
-        if (!mWait) {
-            updateCursorAnchor ();
-            ensureSelectionVisible ();
-            mSpanner.analyze (mText);
-            mEventHandler.hideInsertHandle ();
-        }
-        
-        if (mListener != null) {
-            mListener.afterDelete (this, mText, startLine, startColumn, endLine, endColumn, deletedContent);
-        }
-    }
-    
-    @Override
-    public void onFormatFail (final Throwable throwable) {
-        if (mListener != null && !mListener.onFormatFail (this, throwable)) {
-            post (() -> Toast.makeText (getContext (), throwable.toString (), Toast.LENGTH_SHORT).show ());
-        }
-        mFormatThread = null;
-    }
-    
-    @Override
-    public void onRemove (Content content, ContentLine line) {
-        mLayout.onRemove (content, line);
-    }
-    
-    @Override
-    public void onFormatSucceed (CharSequence originalText, final CharSequence newText) {
-        if (mListener != null) {
-            mListener.onFormatSucceed (this);
-        }
-        mFormatThread = null;
-        if (originalText == mText) {
-            post (() -> {
-                int line = mCursor.getLeftLine ();
-                int column = mCursor.getLeftColumn ();
-                mText.replace (0, 0, getLineCount () - 1, mText.getColumnCount (getLineCount () - 1), newText);
-                getScroller ().forceFinished (true);
-                mCompletionWindow.hide ();
-                hideDiagnosticWindow ();
-                setSelectionAround (line, column);
-            });
-        }
-    }
-    
-    @Override
-    public void onAnalyzeDone (TextAnalyzer provider) {
-        if (provider == mSpanner) {
-            if (mHighlightCurrentBlock) {
-                mCursorPosition = findCursorBlock ();
-            }
-            postInvalidate ();
-        }
-    }
-    
-    private void notifyChanged () {
-    
-        if (getFile () == null) {
-            return;
-        }
-        
-        StudioApp.getInstance ()
-                .getJavaLanguageServer ()
-                .getDocumentHandler ()
-                .onContentChange (
-                        new DocumentChangeEvent (
-                                getFile ().toPath (),
-                                getText ().toString (),
-                                mFileVersion + 1
-                        )
-                );
-    }
-    
-    public void onEndTextSelect () {
-        showTextActionPopup ();
-    }
-    
-    public void onEndGestureInteraction () {
-        showTextActionPopup ();
-    }
-    
-    //-------------------------------------------------------------------------------
-    //-------------------------Inner classes-----------------------------------------
-    //-------------------------------------------------------------------------------
-    
-    /**
-     * Mode for presenting text actions
-     */
-    public enum TextActionMode {
-        
-        /**
-         * In this way, the editor shows a windows inside the editor to present actions
-         */
-        POPUP_WINDOW,
-        /**
-         * Beautified text action window by @RandunuRtx
-         */
-        POPUP_WINDOW_2,
-        /**
-         * In this way, the editor starts a {@link ActionMode} to present actions
-         */
-        ACTION_MODE
-        
-    }
-    
-    
-    /**
-     * Interface for various ways to present text action panel
-     */
-    protected interface EditorTextActionPresenter {
-        
-        /**
-         * Selected text is clicked
-         *
-         * @param event Event
-         */
-        void onSelectedTextClicked (MotionEvent event);
-        
-        /**
-         * Text selection, gesture interaction is over
-         */
-        void onTextSelectionEnd ();
-        
-        /**
-         * Notify that the position of panel should be updated.
-         * If the presenter is displayed in editor's viewport, it should update
-         * its position
-         */
-        void onUpdate ();
-        
-        /**
-         * Notify that the position of panel should be updated.
-         * If the presenter is displayed in editor's viewport, it should update
-         * its position
-         *
-         * @param updateReason {@link TextComposeBasePopup#DISMISS} {@link TextComposeBasePopup#DRAG} {@link TextComposeBasePopup#SCROLL}
-         */
-        void onUpdate (int updateReason);
-        
-        /**
-         * Start the presenter
-         */
-        void onBeginTextSelect ();
-        
-        
-        /**
-         * Exit the presenter
-         *
-         * @return Whether action is executed. Return true if this has cause UI change such as
-         * popup window hides and action mode exits
-         */
-        boolean onExit ();
-        
-        /**
-         * Called by editor to check whether it should draw handles of cursor
-         */
-        boolean shouldShowCursor ();
-        
-    }
-    
-    /**
-     * Class for saving state for cursor
-     */
-    static class CursorPaintAction {
-        
-        /**
-         * Row position
-         */
-        final int row;
-        
-        /**
-         * Center x offset
-         */
-        final float centerX;
-        
-        /**
-         * Handle rectangle
-         */
-        final RectF outRect;
-        
-        /**
-         * Draw as insert cursor
-         */
-        final boolean insert;
-        
-        int handleType = -1;
-        
-        CursorPaintAction (int row, float centerX, RectF outRect, boolean insert) {
-            this.row = row;
-            this.centerX = centerX;
-            this.outRect = outRect;
-            this.insert = insert;
-        }
-        
-        CursorPaintAction (int row, float centerX, RectF outRect, boolean insert, int handleType) {
-            this.row = row;
-            this.centerX = centerX;
-            this.outRect = outRect;
-            this.insert = insert;
-            this.handleType = handleType;
-        }
-        
-        
-        /**
-         * Execute painting on the given editor and canvas
-         */
-        void exec (Canvas canvas, CodeEditor editor) {
-            editor.drawCursor (canvas, centerX, row, outRect, insert, handleType);
-        }
-        
-    }
-    
-    private static final Logger LOG = Logger.instance ("CodeEditor");
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/CursorBlink.java b/app/src/main/java/io/github/rosemoe/editor/widget/CursorBlink.java
deleted file mode 100755
index 60daaa9b2..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/CursorBlink.java
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-/**
- * This class is used to control cursor visibility
- *
- * @author Rose
- */
-final class CursorBlink implements Runnable {
-
-    final CodeEditor editor;
-    long lastSelectionModificationTime = 0;
-    int period;
-    boolean visibility;
-    boolean valid;
-    private float[] buffer;
-
-    CursorBlink(CodeEditor editor, int period) {
-        visibility = true;
-        this.editor = editor;
-        this.period = period;
-    }
-
-    void setPeriod(int period) {
-        this.period = period;
-        if (period <= 0) {
-            visibility = true;
-            valid = false;
-        } else {
-            valid = true;
-        }
-    }
-
-    void onSelectionChanged() {
-        lastSelectionModificationTime = System.currentTimeMillis();
-        visibility = true;
-    }
-
-    boolean isSelectionVisible() {
-        buffer = editor.mLayout.getCharLayoutOffset(editor.getCursor().getLeftLine(), editor.getCursor().getLeftColumn(), buffer);
-        return (buffer[0] >= editor.getOffsetY() && buffer[0] - editor.getRowHeight() <= editor.getOffsetY() + editor.getHeight()
-                && buffer[1] >= editor.getOffsetX() && buffer[1] - 100f/* larger than a single character */ <= editor.getOffsetX() + editor.getWidth());
-    }
-
-    @Override
-    public void run() {
-        if (valid && period > 0) {
-            if (System.currentTimeMillis() - lastSelectionModificationTime >= period * 2) {
-                visibility = !visibility;
-                if (!editor.getCursor().isSelected() && isSelectionVisible()) {
-                    editor.invalidate();
-                }
-            }
-            editor.postDelayed(this, period);
-        } else {
-            visibility = true;
-        }
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/DefaultCompletionItemAdapter.java b/app/src/main/java/io/github/rosemoe/editor/widget/DefaultCompletionItemAdapter.java
deleted file mode 100755
index af80dd485..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/DefaultCompletionItemAdapter.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.content.res.Resources;
-import android.graphics.drawable.Drawable;
-import android.util.TypedValue;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.TextView;
-import androidx.core.content.ContextCompat;
-import com.itsaky.androidide.R;
-import com.itsaky.lsp.models.CompletionItem;
-
-/**
- * Adapter to display results
- *
- * @author Rose
- */
-@SuppressWarnings("CanBeFinal")
-class DefaultCompletionItemAdapter extends EditorCompletionAdapter {
-
-    @Override
-    public int getItemHeight() {
-        return (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 30, Resources.getSystem().getDisplayMetrics());
-    }
-
-    @Override
-    public View getView(int pos, View view, ViewGroup parent, boolean isCurrentCursorPosition) {
-        if (view == null) {
-            view = LayoutInflater.from(getContext()).inflate(R.layout.default_completion_result_item, parent, false);
-        }
-        final CompletionItem item = getItem(pos);
-		final String label = item.getLabel();
-        final String desc = item.getDetail();
-        final Drawable icon = ContextCompat.getDrawable(parent.getContext(), R.mipmap.box_red);
-        
-        TextView tv = view.findViewById(R.id.result_item_label);
-        tv.setText(label);
-        tv = view.findViewById(R.id.result_item_desc);
-        tv.setText(desc);
-        view.setTag(pos);
-        
-        if (isCurrentCursorPosition) {
-            view.setBackgroundColor(0xffdddddd);
-        } else {
-            view.setBackgroundColor(0xffffffff);
-        }
-        
-        ImageView iv = view.findViewById(R.id.result_item_image);
-        iv.setImageDrawable(icon);
-        return view;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorAutoCompleteWindow.java b/app/src/main/java/io/github/rosemoe/editor/widget/EditorAutoCompleteWindow.java
deleted file mode 100755
index d2d1a98a8..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorAutoCompleteWindow.java
+++ /dev/null
@@ -1,361 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.content.Context;
-import android.graphics.drawable.GradientDrawable;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.widget.Toast;
-import com.itsaky.androidide.databinding.LayoutCompletionWindowBinding;
-import com.itsaky.androidide.utils.JavaCharacter;
-import com.itsaky.androidide.utils.Logger;
-import com.itsaky.lsp.models.CompletionItem;
-import com.itsaky.lsp.models.Position;
-import com.itsaky.lsp.models.Range;
-import com.itsaky.lsp.models.TextEdit;
-
-import io.github.rosemoe.editor.interfaces.AutoCompleteProvider;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.TextAnalyzeResult;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Auto complete window for editing code quicker
- *
- * @author Rose
- */
-public class EditorAutoCompleteWindow extends EditorBasePopupWindow {
-    
-    private final static String TIP = "Refreshing...";
-    private final CodeEditor mEditor;
-    private final GradientDrawable mBg;
-    protected boolean mCancelShowUp = false;
-    private int mCurrent = 0;
-    private String mLastPrefix;
-    private AutoCompleteProvider mProvider;
-    private boolean mLoading;
-    private int mMaxHeight;
-    private EditorCompletionAdapter mAdapter;
-	private final LayoutCompletionWindowBinding mBinding;
-	
-    /**
-     * Create a panel instance for the given editor
-     *
-     * @param editor Target editor
-     */
-    public EditorAutoCompleteWindow(CodeEditor editor) {
-        super(editor);
-        mEditor = editor;
-        mAdapter = new DefaultCompletionItemAdapter();
-		mBinding = LayoutCompletionWindowBinding.inflate(LayoutInflater.from(mEditor.getContext()));
-        mBinding.tip.setText(TIP);
-        setContentView(mBinding.getRoot());
-        GradientDrawable gd = new GradientDrawable();
-        gd.setCornerRadii(new float[]{6, 6, 0, 0, 6, 6, 6, 6}); // (top-left, top-right, bottom-right, bottom-left) x 2
-        mBinding.getRoot().setBackground(gd);
-        mBg = gd;
-        applyColorScheme();
-        mBinding.list.setDividerHeight(0);
-        setLoading(true);
-        mBinding.list.setOnItemClickListener((parent, view, position, id) -> {
-            try {
-                select(position);
-            } catch (Exception e) {
-                Toast.makeText(mEditor.getContext(), e.toString(), Toast.LENGTH_SHORT).show();
-            }
-        });
-    }
-
-    protected void setAdapter(EditorCompletionAdapter adapter) {
-        mAdapter = adapter;
-        if (adapter == null) {
-            mAdapter = new DefaultCompletionItemAdapter();
-        }
-    }
-
-    @Override
-    public void show() {
-        if (mCancelShowUp) {
-            return;
-        }
-        
-        super.show();
-    }
-
-    public Context getContext() {
-        return mEditor.getContext();
-    }
-
-    public int getCurrentPosition() {
-        return mCurrent;
-    }
-
-    /**
-     * Set a auto completion items provider
-     *
-     * @param provider New provider.can not be null
-     */
-    public void setProvider(AutoCompleteProvider provider) {
-        mProvider = provider;
-    }
-
-    /**
-     * Apply colors for self
-     */
-    public void applyColorScheme() {
-        EditorColorScheme colors = mEditor.getColorScheme();
-        mBg.setStroke(1, colors.getColor(EditorColorScheme.AUTO_COMP_PANEL_CORNER));
-        mBg.setColor(colors.getColor(EditorColorScheme.AUTO_COMP_PANEL_BG));
-    }
-    
-    /**
-     * Change layout to loading/idle
-     *
-     * @param state Whether loading
-     */
-    public void setLoading(boolean state) {
-        mLoading = state;
-        if (state) {
-            mEditor.postDelayed(() -> {
-                if (mLoading) {
-                    mBinding.tip.setVisibility(View.VISIBLE);
-                }
-            }, 300);
-        } else {
-            mBinding.tip.setVisibility(View.GONE);
-        }
-    }
-
-    /**
-     * Move selection down
-     */
-    public void moveDown() {
-        if (mCurrent + 1 >= mBinding.list.getAdapter().getCount()) {
-            return;
-        }
-        mCurrent++;
-        ((EditorCompletionAdapter) mBinding.list.getAdapter()).notifyDataSetChanged();
-        ensurePosition();
-    }
-    
-    /**
-     * Move selection up
-     */
-    public void moveUp() {
-        if (mCurrent - 1 < 0) {
-            return;
-        }
-        mCurrent--;
-        ((EditorCompletionAdapter) mBinding.list.getAdapter()).notifyDataSetChanged();
-        ensurePosition();
-    }
-
-    /**
-     * Make current selection visible
-     */
-    private void ensurePosition() {
-        mBinding.list.setSelection(mCurrent);
-    }
-
-    /**
-     * Select current position
-     */
-    public void select() {
-        select(mCurrent);
-    }
-
-    /**
-     * Select the given position
-     *
-     * @param pos Index of auto complete item
-     */
-    public void select(int pos) {
-        final CompletionItem item = ((EditorCompletionAdapter) mBinding.list.getAdapter()).getItem(pos);
-        final Range range = getIdentifierRange(mEditor.getCursor().getRight(), mEditor.getText());
-        
-        String text = item.getInsertText() == null ? item.getLabel() : item.getInsertText();
-        final boolean shiftCursor = item.getInsertText() != null && text.contains("$0");
-        
-		mEditor.getText().delete(
-            range.getStart().getLine(),
-            range.getStart().getColumn (),
-            range.getEnd().getLine(),
-            range.getEnd().getColumn ()
-         );
-        if(!text.contains("\n")) {
-            mEditor.getCursor().onCommitText(text);
-        } else {
-            final String[] lines = text.split("\n");
-            mEditor.getCursor().onCommitText(lines[0]);
-            for(int i=1;i<lines.length;i++) {
-                mEditor.getCursor().onCommitText("\n" + lines[i].trim());
-            }
-        }
-        
-        if(shiftCursor) {
-            final int line = mEditor.getCursor().getLeftLine();
-            final String lineText = mEditor.getText().getLineString(line);
-            final int column = lineText.lastIndexOf("$0");
-            if(column != -1){
-                mEditor.setSelection(line, column);
-                mEditor.getText().delete(line, column, line, column + 2);
-            }
-        }
-        
-        final List<TextEdit> edits = item.getAdditionalTextEdits();
-        if(edits != null && edits.size() > 0) {
-            for(int i=0;i<edits.size();i++) {
-                final TextEdit edit = edits.get(i);
-                if(edit == null) {
-                    continue;
-                }
-                final Position start = edit.getRange().getStart();
-                final Position end =  edit.getRange().getEnd();
-                if(start.equals(end)) {
-                    mEditor.getText().insert(start.getLine(), start.getColumn (), edit.getNewText());
-                } else {
-                    mEditor.getText().replace(start.getLine(),
-                            start.getColumn (),
-                            end.getLine(),
-                            end.getColumn (),
-                            edit.getNewText());
-                }
-            }
-        }
-        
-        if(item.getCommand() != null) {
-            var cmd = item.getCommand();
-            if("editor.action.triggerParameterHints".equals(cmd.getCommand())) {
-                
-                // Trigger signature help request if included in CompletionItem
-                // TODO Don't rely on CompletionItem for requesting signature help
-                
-                // If the insert text contains '(', automatically trigger this action
-                mEditor.signatureHelp("(");
-            }
-        }
-        
-        mEditor.postHideCompletionWindow();
-    }
-    
-    private Range getIdentifierRange(int end, Content content) {
-        int start = end;
-        while(start > 0 && JavaCharacter.isJavaIdentifierPart(content.charAt(start - 1))) {
-            start--;
-        }
-
-        CharPosition startPos = content.getIndexer().getCharPosition(start);
-        CharPosition endPos = content.getIndexer().getCharPosition(end);
-        return new Range(new Position(startPos.line, startPos.column), new Position(endPos.line, endPos.column));
-    }
-
-    /**
-     * Get prefix set
-     *
-     * @return The previous prefix
-     */
-    public String getPrefix() {
-        return mLastPrefix;
-    }
-
-    /**
-     * Set prefix for auto complete analysis
-     *
-     * @param prefix The user's input code's prefix
-     */
-    public void setPrefix(String prefix) {
-        if (mCancelShowUp) {
-            return;
-        }
-        setLoading(true);
-        mLastPrefix = prefix;
-        new MatchThread(prefix).start();
-    }
-
-    public void setMaxHeight(int height) {
-        mMaxHeight = height;
-    }
-
-    /**
-     * Display result of analysis
-     *
-     * @param results     Items of analysis
-     */
-    public void displayResults (final List<CompletionItem> results) {
-        mEditor.post(() -> {
-            setLoading(false);
-            mAdapter.clear();
-            mAdapter.attachAttributes(this, results);
-            if (results == null || results.isEmpty()) {
-                if (isShowing ()) {
-                    hide();
-                }
-                return;
-            }
-            mBinding.list.setAdapter(mAdapter);
-            mCurrent = 0;
-            float newHeight = mEditor.getDpUnit() * mAdapter.getItemHeight() * results.size();
-            
-            show ();
-            update(getWidth(), (int) Math.min(newHeight, mMaxHeight));
-        });
-    }
-
-    /**
-     * Analysis thread
-     *
-     * @author Rose
-     */
-    private class MatchThread extends Thread {
-        private final String mPrefix;
-        private final String mFileUri;
-        private final Content mContent;
-        private final boolean mInner;
-        private final TextAnalyzeResult mColors;
-        private final int mIndex;
-        private final int mLine;
-        private final int mColumn;
-        private final AutoCompleteProvider mLocalProvider = mProvider;
-
-        public MatchThread (String prefix) {
-            mPrefix = prefix;
-            mFileUri = mEditor.getFile() != null ? mEditor.getFile().toURI().toString() : null;
-            mContent = mEditor.getText();
-            mColors = mEditor.getTextAnalyzeResult();
-            mIndex = mEditor.getCursor().getLeft();
-            mLine = mEditor.getCursor().getLeftLine();
-            mColumn = mEditor.getCursor().getLeftColumn();
-            mInner = (!mEditor.isHighlightCurrentBlock()) || (mEditor.getBlockIndex() != -1);
-        }
-
-        @Override
-        public void run() {
-            try {
-                displayResults(mLocalProvider.getAutoCompleteItems(mContent, mFileUri, mPrefix, mInner, mColors, mIndex, mLine, mColumn));
-            } catch (Exception e) {
-                LOG.error ("Error computing completion", e);
-                displayResults(new ArrayList<> ());
-            }
-        }
-        
-        private final Logger LOG = Logger.instance ("CompletionMatchThread");
-    }
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorBasePopupWindow.java b/app/src/main/java/io/github/rosemoe/editor/widget/EditorBasePopupWindow.java
deleted file mode 100755
index 2c6542660..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorBasePopupWindow.java
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.view.Gravity;
-import android.widget.PopupWindow;
-import com.itsaky.androidide.R;
-
-/**
- * Editor base panel class
- *
- * @author Rose
- */
-class EditorBasePopupWindow extends PopupWindow {
-    private CodeEditor mEditor;
-    protected int[] mLocation;
-    protected int mTop;
-    protected int mLeft;
-
-    /**
-     * Create a panel for editor
-     *
-     * @param editor Target editor
-     */
-    public EditorBasePopupWindow(CodeEditor editor) {
-        if (editor == null) {
-            throw new IllegalArgumentException();
-        }
-        mLocation = new int[2];
-        mEditor = editor;
-        super.setTouchable(true);
-    }
-
-    /**
-     * Set the left position on the editor rect
-     *
-     * @param x X on editor
-     */
-    public void setExtendedX(float x) {
-        mLeft = (int) x;
-    }
-
-    /**
-     * Set the top position on the editor rect
-     *
-     * @param y Y on editor
-     */
-    public void setExtendedY(float y) {
-        mTop = (int) y;
-    }
-
-    public void updatePosition() {
-        int width = mEditor.getWidth();
-        if (mLeft > width - getWidth()) {
-            mLeft = width - getWidth();
-        }
-        int height = mEditor.getHeight();
-        if (mTop > height - getHeight()) {
-            mTop = height - getHeight();
-        }
-        if (mTop < 0) {
-            mTop = 0;
-        }
-        if (mLeft < 0) {
-            mLeft = 0;
-        }
-        mEditor.getLocationInWindow(mLocation);
-        if (isShowing()) {
-            update(mLocation[0] + mLeft, mLocation[1] + mTop, getWidth(), getHeight());
-        }
-    }
-
-    /**
-     * Show the panel or update its position(If already shown)
-     */
-    public void show() {
-        int width = mEditor.getWidth();
-        if (mLeft > width - getWidth()) {
-            mLeft = width - getWidth();
-        }
-        int height = mEditor.getHeight();
-        if (mTop > height - getHeight()) {
-            mTop = height - getHeight();
-        }
-        if (mTop < 0) {
-            mTop = 0;
-        }
-        if (mLeft < 0) {
-            mLeft = 0;
-        }
-        mEditor.getLocationInWindow(mLocation);
-        if (isShowing()) {
-            update(mLocation[0] + mLeft, mLocation[1] + mTop, getWidth(), getHeight());
-            return;
-        }
-		setAnimationStyle(R.style.PopupAnimation);
-        super.showAtLocation(mEditor,
-                Gravity.START | Gravity.TOP,
-                mLocation[0] + mLeft, mLocation[1] + mTop);
-    }
-
-    /**
-     * Hide the panel (If shown)
-     */
-    public void hide() {
-        if (isShowing()) {
-            super.dismiss();
-        }
-    }
-
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionModeStarter.java b/app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionModeStarter.java
deleted file mode 100755
index 0eac82870..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionModeStarter.java
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.annotation.SuppressLint;
-import android.content.res.TypedArray;
-import android.graphics.PorterDuff;
-import android.graphics.drawable.Drawable;
-import android.view.Gravity;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.BaseAdapter;
-import android.widget.ListView;
-import android.widget.TextView;
-
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.view.ActionMode;
-import androidx.appcompat.view.menu.MenuBuilder;
-import androidx.core.content.ContextCompat;
-
-import com.blankj.utilcode.util.SizeUtils;
-import com.google.android.material.dialog.MaterialAlertDialogBuilder;
-import com.itsaky.androidide.R;
-import com.itsaky.androidide.app.StudioApp;
-import com.itsaky.androidide.utils.DialogUtils;
-import com.itsaky.lsp.models.CodeActionItem;
-import com.itsaky.toaster.Toaster;
-
-import java.util.List;
-
-import io.github.rosemoe.editor.util.IntPair;
-
-/**
- * Action Mode style text action panel for editor
- *
- * @author Rose
- */
-class EditorTextActionModeStarter implements CodeEditor.EditorTextActionPresenter {
-
-    private final CodeEditor mEditor;
-    private ActionMode mActionMode;
-
-    EditorTextActionModeStarter(CodeEditor editor) {
-        mEditor = editor;
-    }
-
-    @SuppressLint("RestrictedApi")
-    @Override
-    public void onBeginTextSelect() {
-        if (mActionMode != null) {
-            return;
-        }
-        mActionMode = ((AppCompatActivity) mEditor.getContext()).startSupportActionMode(new ActionMode.Callback() {
-
-                private List<CodeActionItem> fixes;
-
-                @Override
-                public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
-                    mEditor.mStartedActionMode = CodeEditor.ACTION_MODE_SELECT_TEXT;
-                    if (menu instanceof MenuBuilder) {
-                        MenuBuilder builder = (MenuBuilder) menu;
-                        builder.setOptionalIconsVisible(true);
-                    }
-                    actionMode.setTitle(android.R.string.selectTextMode);
-                    TypedArray array = mEditor.getContext().getTheme().obtainStyledAttributes(new int[]{
-                        android.R.attr.actionModeSelectAllDrawable,
-                        android.R.attr.actionModeCutDrawable,
-                        android.R.attr.actionModeCopyDrawable,
-                        android.R.attr.actionModePasteDrawable,
-                    });
-                    
-                    menu.add (0, 8, 0, R.string.action_expand_selection)
-                            .setShowAsActionFlags (1)
-                            .setIcon (createDrawable (R.drawable.ic_expand_selection));
-                    
-                    menu.add(0, 0, 0, mEditor.getContext().getString(android.R.string.selectAll))
-                        .setShowAsActionFlags(1)
-                        .setIcon(array.getDrawable(0));
-
-                    if (mEditor.isEditable()) {
-                        menu.add(0, 1, 0, mEditor.getContext().getString(android.R.string.cut))
-                            .setShowAsActionFlags(1)
-                            .setIcon(array.getDrawable(1));
-                    }
-
-                    menu.add(0, 2, 0, mEditor.getContext().getString(android.R.string.copy))
-                        .setShowAsActionFlags(1)
-                        .setIcon(array.getDrawable(2));
-
-                    if (mEditor.isEditable()) {
-                        menu.add(0, 3, 0, mEditor.getContext().getString(android.R.string.paste))
-                            .setShowAsActionFlags(1)
-                            .setIcon(array.getDrawable(3));
-                    }
-    
-                    menu.add(0, 4, 0, mEditor.getContext().getString(com.itsaky.androidide.R.string.menu_navigate_definition))
-                            .setShowAsActionFlags(1)
-                            .setIcon(createDrawable(com.itsaky.androidide.R.drawable.ic_goto_definition));
-    
-                    menu.add(0, 5, 0, mEditor.getContext().getString(com.itsaky.androidide.R.string.menu_navigate_references))
-                            .setShowAsActionFlags(1)
-                            .setIcon(createDrawable(com.itsaky.androidide.R.drawable.ic_find_references));
-
-                    menu.add(0, 6, 0, mEditor.getContext().getString(com.itsaky.androidide.R.string.menu_comment_line))
-                        .setShowAsActionFlags(1)
-                        .setIcon(createDrawable(com.itsaky.androidide.R.drawable.ic_comment_line));
-
-                    menu.add(0, 7, 0, mEditor.getContext().getString(com.itsaky.androidide.R.string.menu_uncomment_line))
-                        .setShowAsActionFlags(1)
-                        .setIcon(createDrawable(com.itsaky.androidide.R.drawable.ic_uncomment_line));
-
-                    array.recycle();
-                    return true;
-                }
-
-                private Drawable createDrawable(int icon) {
-                    final Drawable d = ContextCompat.getDrawable(mEditor.getContext(), icon);
-                    if (d != null) {
-                        d.setColorFilter(ContextCompat.getColor(mEditor.getContext(), com.itsaky.androidide.R.color.secondaryColor), PorterDuff.Mode.SRC_ATOP);
-                    }
-                    return d;
-                }
-
-                @Override
-                public boolean onPrepareActionMode(ActionMode actionMode, Menu menu) {
-                    if (mEditor.getFile() == null) return false;
-
-                    final String name = mEditor.getFile().getName();
-                    final boolean isJava = name.endsWith(".java") || name.endsWith(".gradle");
-                    final boolean isXml = name.endsWith(".xml");
-                    final MenuItem def = menu.findItem(4);
-                    final MenuItem ref = menu.findItem(5);
-                    final MenuItem comment = menu.findItem(6);
-                    final MenuItem uncomment = menu.findItem(7);
-                    
-                    comment.setEnabled(isJava || isXml).getIcon().setAlpha(isJava || isXml ? 255 : 76);
-                    uncomment.setEnabled(isJava || isXml).getIcon().setAlpha(isJava || isXml ? 255 : 76);
-    
-                    // These menu items may, or may not be added
-                    // So we need to check if its null or not
-                    // before we perform any further actions
-                    if (def != null) {
-                        def.getIcon().setAlpha(isJava ? 255 : 76);
-                        def.setVisible(isJava);
-                    }
-
-                    if (ref != null) {
-                        ref.getIcon().setAlpha(isJava ? 255 : 76);
-                        ref.setVisible(isJava);
-                    }
-                    
-                    return true;
-                }
-
-                @Override
-                public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
-                    switch (menuItem.getItemId()) {
-                        case 0:
-                            mEditor.selectAll();
-                            break;
-                        case 1:
-                            mEditor.cutText();
-                            break;
-                        case 2:
-                            mEditor.copyText();
-                            break;
-                        case 3:
-                            mEditor.pasteText();
-                            break;
-                        case 4:
-                            mEditor.findDefinition();
-                            break;
-                        case 5:
-                            mEditor.findReferences();
-                            break;
-                        case 6:
-                            mEditor.commentLine();
-                            break;
-                        case 7:
-                            mEditor.uncommentLine();
-                            break;
-                        case 8 :
-                            mEditor.expandSelection ();
-                            break;
-                    }
-    
-                    final var id = menuItem.getItemId ();
-                    if (id == 0 || id == 8) {
-                        return true;
-                    }
-                    
-                    return onExit ();
-                }
-
-                @Override
-                public void onDestroyActionMode(ActionMode actionMode) {
-                    mEditor.mStartedActionMode = CodeEditor.ACTION_MODE_NONE;
-                    mActionMode = null;
-                    mEditor.setSelection(mEditor.getCursor().getLeftLine(), mEditor.getCursor().getLeftColumn());
-                }
-            });
-    }
-
-    @Override
-    public void onUpdate() {
-
-    }
-
-    @Override
-    public void onUpdate(int updateReason) {
-
-    }
-
-    @Override
-    public void onSelectedTextClicked(MotionEvent event) {
-        long packed = mEditor.getPointPositionOnScreen(event.getX(), event.getY());
-        int line = IntPair.getFirst(packed);
-        int column = IntPair.getSecond(packed);
-        mEditor.setSelection(line, column);
-        mEditor.hideAutoCompleteWindow();
-        mEditor.hideDiagnosticWindow();
-    }
-
-    @Override
-    public void onTextSelectionEnd() {
-
-    }
-
-    @Override
-    public boolean onExit() {
-        if (mActionMode != null) {
-            mActionMode.finish();
-            mActionMode = null;
-            return true;
-        }
-        return false;
-    }
-
-    @Override
-    public boolean shouldShowCursor() {
-        return true;
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionWindow.java b/app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionWindow.java
deleted file mode 100755
index e62dfa213..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorTextActionWindow.java
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.annotation.SuppressLint;
-import android.content.res.Resources;
-import android.graphics.drawable.GradientDrawable;
-import android.util.TypedValue;
-import android.view.LayoutInflater;
-import android.view.MotionEvent;
-import android.view.View;
-import android.widget.Button;
-
-import com.itsaky.androidide.R;
-
-/**
- * This will show when selecting text
- *
- * @author Rose
- */
-class EditorTextActionWindow extends EditorBasePopupWindow implements View.OnClickListener, CodeEditor.EditorTextActionPresenter {
-    private final CodeEditor mEditor;
-    private final Button mPasteBtn;
-    private final Button mCopyBtn;
-    private final Button mCutBtn;
-    private final View mRootView;
-    private int maxWidth;
-
-    /**
-     * Create a panel for the given editor
-     *
-     * @param editor Target editor
-     */
-    public EditorTextActionWindow(CodeEditor editor) {
-        super(editor);
-        mEditor = editor;
-        // Since popup window does provide decor view, we have to pass null to this method
-        @SuppressLint("InflateParams")
-        View root = LayoutInflater.from(editor.getContext()).inflate(R.layout.text_compose_panel, null);
-        Button selectAll = root.findViewById(R.id.panel_btn_select_all);
-        Button cut = root.findViewById(R.id.panel_btn_cut);
-        Button copy = root.findViewById(R.id.panel_btn_copy);
-        mPasteBtn = root.findViewById(R.id.panel_btn_paste);
-        mCopyBtn = copy;
-        mCutBtn = cut;
-        selectAll.setOnClickListener(this);
-        cut.setOnClickListener(this);
-        copy.setOnClickListener(this);
-        mPasteBtn.setOnClickListener(this);
-        GradientDrawable gd = new GradientDrawable();
-        gd.setCornerRadius(5);
-        gd.setColor(0xffffffff);
-        root.setBackground(gd);
-        setContentView(root);
-        mRootView = root;
-    }
-
-    @Override
-    public void onBeginTextSelect() {
-        float dpUnit = mEditor.getDpUnit();
-        setHeight((int) (dpUnit * 60));
-        maxWidth = (int) (dpUnit * 230);
-        setWidth(maxWidth);
-    }
-
-    @Override
-    public boolean onExit() {
-        boolean result = isShowing();
-        hide();
-        return result;
-    }
-
-    @Override
-    public void onUpdate() {
-        hide();
-    }
-
-    @Override
-    public void onUpdate(int updateReason) {
-        hide();
-    }
-
-    @Override
-    public void onSelectedTextClicked(MotionEvent event) {
-        EditorTextActionWindow panel = this;
-        if (panel.isShowing()) {
-            panel.hide();
-        } else {
-            int first = mEditor.getFirstVisibleRow();
-            int last = mEditor.getLastVisibleRow();
-            int left = mEditor.getCursor().getLeftLine();
-            int right = mEditor.getCursor().getRightLine();
-            int toLineBottom;
-            if (right <= first) {
-                toLineBottom = first;
-            } else if (right > last) {
-                if (left <= first) {
-                    toLineBottom = (first + last) / 2;
-                } else if (left >= last) {
-                    toLineBottom = last - 2;
-                } else {
-                    if (left + 3 >= last) {
-                        toLineBottom = left - 2;
-                    } else {
-                        toLineBottom = left + 1;
-                    }
-                }
-            } else {
-                if (left <= first) {
-                    if (right + 3 >= last) {
-                        toLineBottom = right - 2;
-                    } else {
-                        toLineBottom = right + 1;
-                    }
-                } else {
-                    if (left + 5 >= right) {
-                        toLineBottom = right + 1;
-                    } else {
-                        toLineBottom = (left + right) / 2;
-                    }
-                }
-            }
-            toLineBottom = Math.max(0, toLineBottom);
-            int panelY = mEditor.getRowBottom(toLineBottom) - mEditor.getOffsetY();
-            float handleLeftX = mEditor.getOffset(left, mEditor.getCursor().getLeftColumn());
-            float handleRightX = mEditor.getOffset(right, mEditor.getCursor().getRightColumn());
-            int panelX = (int) ((handleLeftX + handleRightX) / 2f);
-            panel.setExtendedX(panelX);
-            panel.setExtendedY(panelY);
-            panel.show();
-        }
-    }
-
-    @Override
-    public void onTextSelectionEnd() {
-
-    }
-
-    @Override
-    public boolean shouldShowCursor() {
-        return !isShowing();
-    }
-
-    /**
-     * Update the state of paste button
-     */
-    private void updateBtnState() {
-        mPasteBtn.setEnabled(mEditor.hasClip());
-        mCopyBtn.setVisibility(mEditor.getCursor().isSelected() ? View.VISIBLE : View.GONE);
-        mCutBtn.setVisibility(mEditor.getCursor().isSelected() ? View.VISIBLE : View.GONE);
-        mRootView.measure(View.MeasureSpec.makeMeasureSpec(1000000, View.MeasureSpec.AT_MOST), View.MeasureSpec.makeMeasureSpec(100000, View.MeasureSpec.AT_MOST));
-        setWidth(Math.min(mRootView.getMeasuredWidth(), maxWidth));
-    }
-
-    @Override
-    public void show() {
-        updateBtnState();
-        setElevation(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, Resources.getSystem().getDisplayMetrics()));
-        super.show();
-    }
-
-    @Override
-    public void onClick(View p1) {
-        int id = p1.getId();
-        if (id == R.id.panel_btn_select_all) {
-            mEditor.selectAll();
-        } else if (id == R.id.panel_btn_cut) {
-            mEditor.copyText();
-            if (mEditor.getCursor().isSelected()) {
-                mEditor.getCursor().onDeleteKeyPressed();
-            }
-        } else if (id == R.id.panel_btn_paste) {
-            mEditor.pasteText();
-            mEditor.setSelection(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
-        } else if (id == R.id.panel_btn_copy) {
-            mEditor.copyText();
-            mEditor.setSelection(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
-        }
-        hide();
-    }
-
-}
-
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/KeyMetaStates.java b/app/src/main/java/io/github/rosemoe/editor/widget/KeyMetaStates.java
deleted file mode 100755
index 923268281..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/KeyMetaStates.java
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.text.Editable;
-import android.view.KeyEvent;
-
-/**
- * Handles key events such SHIFT
- * @author Rosemoe
- */
-public class KeyMetaStates extends android.text.method.MetaKeyKeyListener {
-
-    private CodeEditor editor;
-    /**
-     * Dummy text used for Android original APIs
-     */
-    private Editable dest = Editable.Factory.getInstance().newEditable("");
-
-    public KeyMetaStates(CodeEditor editor) {
-        this.editor = editor;
-    }
-
-    public void onKeyDown(KeyEvent event) {
-        super.onKeyDown(editor, dest, event.getKeyCode(), event);
-    }
-
-    public void onKeyUp(KeyEvent event) {
-        super.onKeyUp(editor, dest, event.getKeyCode(), event);
-    }
-
-    public boolean isShiftPressed() {
-        return getMetaState(dest, META_SHIFT_ON) != 0;
-    }
-
-    public void adjust() {
-        adjustMetaAfterKeypress(dest);
-    }
-
-    public void clearMetaStates(int states) {
-        clearMetaKeyState(editor, dest, states);
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/Row.java b/app/src/main/java/io/github/rosemoe/editor/widget/Row.java
deleted file mode 100755
index b3febb621..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/Row.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-/**
- * This class represents a 'row' in editor
- * Editor uses this to draw rows
- *
- * @author Rose
- */
-class Row {
-
-    /**
-     * The index in lines
-     * But not row index
-     */
-    public int lineIndex;
-
-    /**
-     * Whether this row is a start of a line
-     * Editor will draw line number to left of this row to indicate this
-     */
-    public boolean isLeadingRow;
-
-    /**
-     * Start index in target line
-     */
-    public int startColumn;
-
-    /**
-     * End index in target line
-     */
-    public int endColumn;
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/RowIterator.java b/app/src/main/java/io/github/rosemoe/editor/widget/RowIterator.java
deleted file mode 100755
index fe06e8bdd..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/RowIterator.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import java.util.NoSuchElementException;
-
-/**
- * Row iterator.
- * This iterator is able to return a series of Row objects linearly
- * Editor uses this to get information of rows and paint them accordingly
- *
- * @author Rose
- */
-interface RowIterator {
-
-    /**
-     * Return next Row object
-     * <p>
-     * The result should not be stored, because implementing classes will always return the same
-     * object due to performance
-     *
-     * @return Row object contains the information about a row
-     * @throws NoSuchElementException If no more row available
-     */
-    Row next();
-
-    /**
-     * Whether there is more Row object
-     *
-     * @return Whether more row available
-     */
-    boolean hasNext();
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/SymbolChannel.java b/app/src/main/java/io/github/rosemoe/editor/widget/SymbolChannel.java
deleted file mode 100755
index 0381f54cb..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/SymbolChannel.java
+++ /dev/null
@@ -1,62 +0,0 @@
-package io.github.rosemoe.editor.widget;
-
-import com.itsaky.androidide.utils.Symbols;
-import io.github.rosemoe.editor.text.Cursor;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * A channel to insert symbols in {@link CodeEditor}
- * @author Rosemoe
- */
-public class SymbolChannel {
-
-    private CodeEditor mEditor;
-    
-    private final List<Character> pairs;
-
-    protected SymbolChannel(CodeEditor editor) {
-        mEditor = editor;
-        pairs = new ArrayList<>();
-        pairs.add('}');
-        pairs.add(')');
-        pairs.add(']');
-        pairs.add('"');
-        pairs.add('\'');
-        pairs.add('>');
-    }
-    
-    /**
-     * Inserts the given text in the editor.
-     * <p>
-     * This method allows you to insert texts externally to the content of editor.
-     * The content of {@param symbolText} is not checked to be exactly characters of symbols.
-     *
-     * @param symbolText Text to insert, usually a text of symbols
-     * @param selectionOffset New selection position relative to the start of text to insert.
-     *                        Ranging from 0 to symbolText.length()
-     */
-    public void insertSymbol(String text, int selectionOffset) {
-        if (selectionOffset < 0 || selectionOffset > text.length()) {
-            return;
-        }
-        Cursor cur = mEditor.getText().getCursor();
-        if (cur.isSelected()) {
-            cur.onDeleteKeyPressed();
-            mEditor.notifyExternalCursorChange();
-        }
-        
-        if(cur.getLeftColumn() < mEditor.getText().getColumnCount(cur.getLeftLine())
-           && text.length() == 1
-           && text.charAt(0) == mEditor.getText().charAt(cur.getLeftLine(), cur.getLeftColumn())
-           && pairs.contains(text.charAt(0))) {
-               mEditor.moveSelectionRight();
-        } else {
-            cur.onCommitText(text);
-            if (selectionOffset != text.length()) {
-                mEditor.setSelection(cur.getRightLine(), cur.getRightColumn() - (text.length() - selectionOffset));
-            }
-        }
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/SymbolPairMatch.java b/app/src/main/java/io/github/rosemoe/editor/widget/SymbolPairMatch.java
deleted file mode 100755
index 52646e62f..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/SymbolPairMatch.java
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * Define symbol pairs to complete them automatically when the user
- * enters the first character of pair.
- *
- * @author Rosemoe
- */
-public class SymbolPairMatch {
-
-    private Map<Character, Replacement> pairMaps = new HashMap<>();
-
-    private SymbolPairMatch parent;
-
-    public SymbolPairMatch() {
-        this(null);
-    }
-
-    public SymbolPairMatch(SymbolPairMatch parent) {
-        setParent(parent);
-    }
-
-    protected void setParent(SymbolPairMatch parent) {
-        this.parent = parent;
-    }
-
-    /**
-     * Put a pair of symbol completion
-     * When the user types the {@param firstCharacter}, it will be replaced by {@param replacement}
-     * Replacement maybe null to disable completion for this character.
-     *
-     * @see Replacement
-     */
-    public void putPair(char firstCharacter, Replacement replacement) {
-        pairMaps.put(firstCharacter, replacement);
-    }
-
-    public final Replacement getCompletion(char character) {
-        Replacement result = parent != null ? parent.getCompletion(character) : null;
-        if (result == null) {
-            result = pairMaps.get(character);
-        }
-        return result;
-    }
-
-    public void removeAllRules() {
-        pairMaps.clear();
-    }
-
-    /**
-     * Defines a replacement of input
-     */
-    public static class Replacement {
-
-        /**
-         * Defines that this character does not have to be replaced
-         */
-        public final static Replacement NO_REPLACEMENT = new Replacement("", 0);
-
-        public final String text;
-
-        public final int selection;
-
-        /**
-         * The entered character will be replaced to {@param text} and
-         * the new cursor position will be {@param selection}
-         * The value of {@param selection} maybe 0 to {@param text}.length()
-         */
-        public Replacement(String text, int selection) {
-            this.selection = selection;
-            this.text = text;
-            if (selection < 0 || selection > text.length()) {
-                throw new IllegalArgumentException("invalid selection value");
-            }
-        }
-
-    }
-
-    public final static class DefaultSymbolPairs extends SymbolPairMatch {
-        public DefaultSymbolPairs() {
-            super.putPair('{', new Replacement("{}", 1));
-            super.putPair('(', new Replacement("()", 1));
-            super.putPair('[', new Replacement("[]", 1));
-            super.putPair('"', new Replacement("\"\"", 1));
-            super.putPair('\'', new Replacement("''", 1));
-        }
-    }
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/TextActionPopupWindow.java b/app/src/main/java/io/github/rosemoe/editor/widget/TextActionPopupWindow.java
deleted file mode 100755
index 43884109f..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/TextActionPopupWindow.java
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.annotation.SuppressLint;
-import android.content.res.Resources;
-import android.graphics.drawable.GradientDrawable;
-import android.os.Build;
-import android.util.TypedValue;
-import android.view.LayoutInflater;
-import android.view.MotionEvent;
-import android.view.View;
-import android.widget.LinearLayout;
-import com.google.android.material.button.MaterialButton;
-import com.itsaky.androidide.R;
-
-public class TextActionPopupWindow extends TextComposeBasePopup implements View.OnClickListener, CodeEditor.EditorTextActionPresenter {
-    private final CodeEditor mEditor;
-    private final MaterialButton mPasteBtn;
-    private final MaterialButton mSelectAll;
-    private final LinearLayout mContainer;
-
-    private float mDpUnit = 0f;
-
-    /**
-     * Create a panel for editor
-     *
-     * @param editor Target editor
-     */
-    public TextActionPopupWindow(CodeEditor editor) {
-        super(editor);
-        mEditor = editor;
-        mDpUnit = mEditor.getDpUnit();
-        int popupHeightInDp = 60;
-        popHeightPx = (int) (popupHeightInDp * mDpUnit);
-
-        // Since popup window does provide decor view, we have to pass null to this method
-        @SuppressLint("InflateParams")
-        View root = LayoutInflater.from(editor.getContext()).inflate(R.layout.text_compose_popup_window, null);
-        mSelectAll = root.findViewById(R.id.tcpw_material_button_select_all);
-        mContainer = root.findViewById(R.id.text_compose_panel);
-        MaterialButton cut = root.findViewById(R.id.tcpw_material_button_cut);
-        MaterialButton copy = root.findViewById(R.id.tcpw_material_button_copy);
-        mPasteBtn = root.findViewById(R.id.tcpw_material_button_paste);
-        mSelectAll.setOnClickListener(this);
-        cut.setOnClickListener(this);
-        copy.setOnClickListener(this);
-        mPasteBtn.setOnClickListener(this);
-        GradientDrawable gd = new GradientDrawable();
-        gd.setCornerRadius(mDpUnit * 8);
-        gd.setStroke(1, 0xff808080);
-        gd.setColor(0xffffffff);
-        root.setBackground(gd);
-        setContentView(root);
-    }
-
-    @Override
-    public void show() {
-        setElevation(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2f, Resources.getSystem().getDisplayMetrics()));
-        super.show();
-    }
-
-    @Override
-    public void onClick(View view) {
-        int id = view.getId();
-        if (id == R.id.tcpw_material_button_select_all) {
-            mEditor.selectAll();
-        } else if (id == R.id.tcpw_material_button_cut) {
-            mEditor.copyText();
-            if (mEditor.getCursor().isSelected()) {
-                mEditor.getCursor().onDeleteKeyPressed();
-            }
-        } else if (id == R.id.tcpw_material_button_paste) {
-            mEditor.pasteText();
-            mEditor.setSelection(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
-        } else if (id == R.id.tcpw_material_button_copy) {
-            mEditor.copyText();
-            mEditor.setSelection(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
-        }
-        hide(DISMISS);
-    }
-
-    @Override
-    public void onSelectedTextClicked(MotionEvent event) {
-
-    }
-
-    @Deprecated
-    @Override
-    public void onUpdate() {
-
-    }
-
-    @Override
-    public void onUpdate(int updateReason) {
-        hide(updateReason);
-    }
-
-    @Override
-    public void onBeginTextSelect() {
-        setHeight((int) (LinearLayout.LayoutParams.WRAP_CONTENT));
-        setWidth((int) (LinearLayout.LayoutParams.WRAP_CONTENT));
-    }
-
-    @Override
-    public boolean onExit() {
-        boolean result = isShowing();
-        hide(DISMISS);
-        if (mEditor.getCursor().isSelected()) {
-            mEditor.setSelection(mEditor.getCursor().getLeftLine(), mEditor.getCursor().getLeftColumn());
-        }
-        return result && !isShowing();
-    }
-
-    @Override
-    public boolean shouldShowCursor() {
-        // this will show handler along with popup
-        return true;
-    }
-
-    @Override
-    public void onTextSelectionEnd() {
-        TextActionPopupWindow panel = this;
-        if (panel.isShowing()) {
-            panel.hide(DISMISS);
-        } else {
-            int first = mEditor.getFirstVisibleRow();
-            int last = mEditor.getLastVisibleRow();
-            int left = mEditor.getCursor().getLeftLine();
-            int right = mEditor.getCursor().getRightLine();
-            int toLineBottom;
-            if (right <= first) {
-                toLineBottom = first;
-            } else if (right > last) {
-                if (left <= first) {
-                    toLineBottom = (first + last) / 2;
-                } else if (left >= last) {
-                    toLineBottom = last - 2;
-                } else {
-                    if (left + 3 >= last) {
-                        toLineBottom = left - 2;
-                    } else {
-                        toLineBottom = left + 1;
-                    }
-                }
-            } else {
-                if (left <= first) {
-                    if (right + 3 >= last) {
-                        toLineBottom = right - 2;
-                    } else {
-                        toLineBottom = right + 1;
-                    }
-                } else {
-                    if (left + 5 >= right) {
-                        toLineBottom = right + 1;
-                    } else {
-                        toLineBottom = (left + right) / 2;
-                    }
-                }
-            }
-            toLineBottom = Math.max(0, toLineBottom);
-            int panelY = mEditor.getRowBottom(toLineBottom) - mEditor.getOffsetY();
-            float handleLeftX = mEditor.getOffset(left, mEditor.getCursor().getLeftColumn());
-            float handleRightX = mEditor.getOffset(right, mEditor.getCursor().getRightColumn());
-            int panelX = (int) ((handleLeftX + handleRightX) / 2f);
-            panel.setExtendedX(mDpUnit * 28);
-            panel.setExtendedY(panelY);
-            panel.show();
-            mContainer.requestFocus();
-            //mSelectAll.clearFocus();
-        }
-    }
-
-
-}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/TextComposeBasePopup.java b/app/src/main/java/io/github/rosemoe/editor/widget/TextComposeBasePopup.java
deleted file mode 100755
index 94ab24f59..000000000
--- a/app/src/main/java/io/github/rosemoe/editor/widget/TextComposeBasePopup.java
+++ /dev/null
@@ -1,150 +0,0 @@
-/*
- *   Copyright 2020-2021 Rosemoe
- *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-package io.github.rosemoe.editor.widget;
-
-import android.graphics.RectF;
-import android.view.Gravity;
-import android.widget.PopupWindow;
-
-/**
- * Editor base panel class
- *
- * @author Rose
- */
-class TextComposeBasePopup extends PopupWindow {
-    public static int DISMISS = 0;
-    public static int DRAG = 1;
-    public static int SCROLL = 2;
-    private final float textSizePx;
-    private CodeEditor mEditor;
-    private int[] mLocation;
-    private int mTop;
-    private int mMaximumTop;
-    private int mLeft;
-    protected int popHeightPx;
-    private int hideType = -1;
-
-    /**
-     * Create a panel for editor
-     *
-     * @param editor Target editor
-     */
-    public TextComposeBasePopup(CodeEditor editor) {
-        if (editor == null) {
-            throw new IllegalArgumentException();
-        }
-        mLocation = new int[2];
-        mEditor = editor;
-        super.setTouchable(true);
-        textSizePx = mEditor.getTextSizePx();
-    }
-
-    /**
-     * Set the left position on the editor rect
-     *
-     * @param x X on editor
-     */
-    public void setExtendedX(float x) {
-        mLeft = (int) x;
-    }
-
-    /**
-     * Set the top position on the editor rect
-     *
-     * @param y Y on editor
-     */
-    public void setExtendedY(float y) {
-        mMaximumTop = (int) y;
-    }
-
-    private final RectF selectionRect = new RectF();
-
-
-    /**
-     * Show the panel or update its position(If already shown)
-     */
-    public void show() {
-        int width = mEditor.getWidth();
-        RectF leftHandleRect = mEditor.getLeftHandleRect();
-        RectF rightHandleRect = mEditor.getRightHandleRect();
-
-        // when right handle goes below visible area, it rect becomes empty. so this feature (or bug) used to calculate popup location
-        // if we can not use this,
-        // alternative method can be implemented using mMaximumTop
-        // @TODO implement a proper way to calculate popup position
-        if (rightHandleRect.isEmpty()) {
-            rightHandleRect.top = mMaximumTop;
-            rightHandleRect.left = width;
-            rightHandleRect.bottom = mMaximumTop;
-            rightHandleRect.right = width;
-        }
-
-        float handleHeight = leftHandleRect.height();
-        selectionRect.top = Math.min(leftHandleRect.top, rightHandleRect.top);
-        selectionRect.bottom = Math.max(leftHandleRect.bottom, rightHandleRect.bottom);
-        selectionRect.left = Math.min(leftHandleRect.left, rightHandleRect.left);
-        selectionRect.right = Math.max(leftHandleRect.right, rightHandleRect.right);
-
-        // prevent drawing popup over the keyboard
-        /*if (selectionRect.bottom > mMaximumTop - popHeightPx) {
-            selectionRect.bottom -= popHeightPx;
-        }*/
-
-        if (mLeft > width - getWidth()) {
-            mLeft = width - getWidth();
-        }
-        int height = mEditor.getHeight();
-        if (mTop > height - getHeight()) {
-            mTop = height - getHeight();
-        }
-        if (mTop < 0) {
-            mTop = 0;
-        }
-        if (mLeft < 0) {
-            mLeft = 0;
-        }
-        mEditor.getLocationInWindow(mLocation);
-        boolean topCovered = mLocation[1] > selectionRect.top - textSizePx - popHeightPx - handleHeight;
-
-        if (topCovered) {
-            mTop = (int) (selectionRect.bottom + (handleHeight));
-        } else {
-            mTop = (int) (selectionRect.top - textSizePx - popHeightPx - handleHeight);
-        }
-        if (isShowing()) {
-            update(mLocation[0] + mLeft, mLocation[1] + mTop, getWidth(), getHeight());
-            return;
-        }
-        super.showAtLocation(mEditor,
-                Gravity.START | Gravity.TOP,
-                mLocation[0] + mLeft, mLocation[1] + mTop);
-    }
-
-    /**
-     * Hide the panel (If shown)
-     */
-    public void hide(int type) {
-        if (isShowing()) {
-            hideType = type;
-            if ((hideType == DRAG || hideType == SCROLL) && mEditor.getEventHandler() != null) {
-                mEditor.getEventHandler().notifyGestureInteractionEnd(type);
-            }
-            super.dismiss();
-        }
-    }
-
-}
-
diff --git a/app/src/main/res/layout/activity_editor.xml b/app/src/main/res/layout/activity_editor.xml
index 4606f617d..4fdc3b6ea 100755
--- a/app/src/main/res/layout/activity_editor.xml
+++ b/app/src/main/res/layout/activity_editor.xml
@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.drawerlayout.widget.DrawerLayout
-	xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
 	xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
 	android:layout_height="match_parent"
 	android:layout_width="match_parent"
 	android:id="@+id/editor_drawerLayout"
@@ -69,22 +67,6 @@
 		<include
 			android:id="@+id/bottom_sheet"
 			layout="@layout/layout_editor_bottom_sheet"/>
-
-		<TextView
-            android:id="@+id/symbolText"
-            android:layout_height="wrap_content"
-            android:layout_width="wrap_content"
-            android:textColor="@color/primaryTextColor"
-            android:textSize="14sp"
-            android:singleLine="true"
-            android:background="@color/content_background"
-            android:clickable="false"
-            android:focusable="false"
-            android:paddingStart="8dp"
-            android:paddingEnd="8dp"
-            android:paddingTop="4dp"
-            android:paddingBottom="4dp"
-            tools:ignore="MissingConstraints"/>
         
         <include
             android:id="@+id/diagnosticInfo"
diff --git a/app/src/main/res/layout/fragment_non_editable_editor.xml b/app/src/main/res/layout/fragment_non_editable_editor.xml
index 47eb37a0f..d4881a809 100644
--- a/app/src/main/res/layout/fragment_non_editable_editor.xml
+++ b/app/src/main/res/layout/fragment_non_editable_editor.xml
@@ -15,7 +15,7 @@
   ~   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   -->
 
-<io.github.rosemoe.editor.widget.CodeEditor
+<com.itsaky.androidide.views.editor.IDEEditor
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/editor"
     android:layout_width="match_parent"
diff --git a/app/src/main/res/layout/layout_code_editor.xml b/app/src/main/res/layout/layout_code_editor.xml
index 5b8615c84..02cb4faec 100644
--- a/app/src/main/res/layout/layout_code_editor.xml
+++ b/app/src/main/res/layout/layout_code_editor.xml
@@ -5,7 +5,7 @@
 	android:layout_width="match_parent"
 	android:layout_height="match_parent">
     
-    <com.itsaky.androidide.views.Editor
+    <com.itsaky.androidide.views.editor.IDEEditor
         android:id="@+id/editor"
         android:layout_height="0dp"
         android:layout_width="match_parent"
diff --git a/common/src/main/java/com/itsaky/androidide/utils/CharSequenceInputStream.java b/common/src/main/java/com/itsaky/androidide/utils/CharSequenceInputStream.java
new file mode 100644
index 000000000..db787bc60
--- /dev/null
+++ b/common/src/main/java/com/itsaky/androidide/utils/CharSequenceInputStream.java
@@ -0,0 +1,277 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.itsaky.androidide.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CoderResult;
+import java.nio.charset.CodingErrorAction;
+import java.nio.charset.UnsupportedCharsetException;
+import java.util.Objects;
+
+/**
+ * Implements an {@link InputStream} to read from String, StringBuffer, StringBuilder or CharBuffer.
+ * <p>
+ * <strong>Note:</strong> Supports {@link #mark(int)} and {@link #reset()}.
+ * </p>
+ *
+ * @since 2.2
+ */
+public class CharSequenceInputStream extends InputStream {
+    
+    private static final int BUFFER_SIZE = 2048;
+    
+    private static final int NO_MARK = -1;
+    
+    private final CharsetEncoder charsetEncoder;
+    private final CharBuffer cBuf;
+    private final ByteBuffer bBuf;
+    
+    private int cBufMark; // position in cBuf
+    private int bBufMark; // position in bBuf
+    
+    /**
+     * Constructs a new instance with a buffer size of 2048.
+     *
+     * @param cs the input character sequence.
+     * @param charset the character set name to use.
+     * @throws IllegalArgumentException if the buffer is not large enough to hold a complete character.
+     */
+    public CharSequenceInputStream(final CharSequence cs, final Charset charset) {
+        this(cs, charset, BUFFER_SIZE);
+    }
+    
+    /**
+     * Constructs a new instance.
+     *
+     * @param cs the input character sequence.
+     * @param charset the character set name to use, null maps to the default Charset.
+     * @param bufferSize the buffer size to use.
+     * @throws IllegalArgumentException if the buffer is not large enough to hold a complete character.
+     */
+    public CharSequenceInputStream(final CharSequence cs, final Charset charset, final int bufferSize) {
+        // @formatter:off
+        this.charsetEncoder = toCharset(charset).newEncoder()
+                .onMalformedInput(CodingErrorAction.REPLACE)
+                .onUnmappableCharacter(CodingErrorAction.REPLACE);
+        // @formatter:on
+        // Ensure that buffer is long enough to hold a complete character
+        this.bBuf = ByteBuffer.allocate(ReaderInputStream.checkMinBufferSize(charsetEncoder, bufferSize));
+        this.bBuf.flip();
+        this.cBuf = CharBuffer.wrap(cs);
+        this.cBufMark = NO_MARK;
+        this.bBufMark = NO_MARK;
+    }
+    
+    /**
+     * Constructs a new instance with a buffer size of 2048.
+     *
+     * @param cs the input character sequence.
+     * @param charset the character set name to use.
+     * @throws IllegalArgumentException if the buffer is not large enough to hold a complete character.
+     */
+    public CharSequenceInputStream(final CharSequence cs, final String charset) {
+        this(cs, charset, BUFFER_SIZE);
+    }
+    
+    /**
+     * Constructs a new instance.
+     *
+     * @param cs the input character sequence.
+     * @param charset the character set name to use, null maps to the default Charset.
+     * @param bufferSize the buffer size to use.
+     * @throws IllegalArgumentException if the buffer is not large enough to hold a complete character.
+     */
+    public CharSequenceInputStream(final CharSequence cs, final String charset, final int bufferSize) {
+        this(cs, toCharset(charset), bufferSize);
+    }
+    
+    /**
+     * Return an estimate of the number of bytes remaining in the byte stream.
+     * @return the count of bytes that can be read without blocking (or returning EOF).
+     *
+     * @throws IOException if an error occurs (probably not possible).
+     */
+    @Override
+    public int available() throws IOException {
+        // The cached entries are in bbuf; since encoding always creates at least one byte
+        // per character, we can add the two to get a better estimate (e.g. if bbuf is empty)
+        // Note that the previous implementation (2.4) could return zero even though there were
+        // encoded bytes still available.
+        return this.bBuf.remaining() + this.cBuf.remaining();
+    }
+    
+    @Override
+    public void close() throws IOException {
+        // noop
+    }
+    
+    /**
+     * Fills the byte output buffer from the input char buffer.
+     *
+     * @throws CharacterCodingException
+     *             an error encoding data.
+     */
+    private void fillBuffer() throws CharacterCodingException {
+        this.bBuf.compact();
+        final CoderResult result = this.charsetEncoder.encode(this.cBuf, this.bBuf, true);
+        if (result.isError()) {
+            result.throwException();
+        }
+        this.bBuf.flip();
+    }
+    
+    /**
+     * Gets the CharsetEncoder.
+     *
+     * @return the CharsetEncoder.
+     */
+    CharsetEncoder getCharsetEncoder() {
+        return charsetEncoder;
+    }
+    
+    /**
+     * {@inheritDoc}
+     * @param readlimit max read limit (ignored).
+     */
+    @Override
+    public synchronized void mark(final int readlimit) {
+        this.cBufMark = this.cBuf.position();
+        this.bBufMark = this.bBuf.position();
+        this.cBuf.mark();
+        this.bBuf.mark();
+        // It would be nice to be able to use mark & reset on the cbuf and bbuf;
+        // however the bbuf is re-used so that won't work
+    }
+    
+    @Override
+    public boolean markSupported() {
+        return true;
+    }
+    
+    @Override
+    public int read() throws IOException {
+        for (;;) {
+            if (this.bBuf.hasRemaining()) {
+                return this.bBuf.get() & 0xFF;
+            }
+            fillBuffer();
+            if (!this.bBuf.hasRemaining() && !this.cBuf.hasRemaining()) {
+                return -1;
+            }
+        }
+    }
+    
+    @Override
+    public int read(final byte[] b) throws IOException {
+        return read(b, 0, b.length);
+    }
+    
+    @Override
+    public int read(final byte[] array, int off, int len) throws IOException {
+        Objects.requireNonNull(array, "array");
+        if (len < 0 || (off + len) > array.length) {
+            throw new IndexOutOfBoundsException("Array Size=" + array.length + ", offset=" + off + ", length=" + len);
+        }
+        if (len == 0) {
+            return 0; // must return 0 for zero length read
+        }
+        if (!this.bBuf.hasRemaining() && !this.cBuf.hasRemaining()) {
+            return -1;
+        }
+        int bytesRead = 0;
+        while (len > 0) {
+            if (this.bBuf.hasRemaining()) {
+                final int chunk = Math.min(this.bBuf.remaining(), len);
+                this.bBuf.get(array, off, chunk);
+                off += chunk;
+                len -= chunk;
+                bytesRead += chunk;
+            } else {
+                fillBuffer();
+                if (!this.bBuf.hasRemaining() && !this.cBuf.hasRemaining()) {
+                    break;
+                }
+            }
+        }
+        return bytesRead == 0 && !this.cBuf.hasRemaining() ? -1 : bytesRead;
+    }
+    
+    @Override
+    public synchronized void reset() throws IOException {
+        //
+        // This is not the most efficient implementation, as it re-encodes from the beginning.
+        //
+        // Since the bbuf is re-used, in general it's necessary to re-encode the data.
+        //
+        // It should be possible to apply some optimisations however:
+        // + use mark/reset on the cbuf and bbuf. This would only work if the buffer had not been (re)filled since
+        // the mark. The code would have to catch InvalidMarkException - does not seem possible to check if mark is
+        // valid otherwise. + Try saving the state of the cbuf before each fillBuffer; it might be possible to
+        // restart from there.
+        //
+        if (this.cBufMark != NO_MARK) {
+            // if cbuf is at 0, we have not started reading anything, so skip re-encoding
+            if (this.cBuf.position() != 0) {
+                this.charsetEncoder.reset();
+                this.cBuf.rewind();
+                this.bBuf.rewind();
+                this.bBuf.limit(0); // rewind does not clear the buffer
+                while(this.cBuf.position() < this.cBufMark) {
+                    this.bBuf.rewind(); // empty the buffer (we only refill when empty during normal processing)
+                    this.bBuf.limit(0);
+                    fillBuffer();
+                }
+            }
+            if (this.cBuf.position() != this.cBufMark) {
+                throw new IllegalStateException("Unexpected CharBuffer position: actual=" + cBuf.position() + " " +
+                        "expected=" + this.cBufMark);
+            }
+            this.bBuf.position(this.bBufMark);
+            this.cBufMark = NO_MARK;
+            this.bBufMark = NO_MARK;
+        }
+    }
+    
+    @Override
+    public long skip(long n) throws IOException {
+        //
+        // This could be made more efficient by using position to skip within the current buffer.
+        //
+        long skipped = 0;
+        while (n > 0 && available() > 0) {
+            //noinspection ResultOfMethodCallIgnored
+            this.read();
+            n--;
+            skipped++;
+        }
+        return skipped;
+    }
+    
+    static Charset toCharset(final Charset charset) {
+        return charset == null ? Charset.defaultCharset() : charset;
+    }
+    
+    static Charset toCharset(final String charsetName) throws UnsupportedCharsetException {
+        return charsetName == null ? Charset.defaultCharset() : Charset.forName(charsetName);
+    }
+}
\ No newline at end of file
diff --git a/common/src/main/java/com/itsaky/androidide/utils/ReaderInputStream.java b/common/src/main/java/com/itsaky/androidide/utils/ReaderInputStream.java
new file mode 100644
index 000000000..8d1b46152
--- /dev/null
+++ b/common/src/main/java/com/itsaky/androidide/utils/ReaderInputStream.java
@@ -0,0 +1,331 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.itsaky.androidide.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CoderResult;
+import java.nio.charset.CodingErrorAction;
+import java.nio.charset.UnsupportedCharsetException;
+import java.util.Objects;
+
+/**
+ * {@link InputStream} implementation that reads a character stream from a {@link Reader} and transforms it to a byte
+ * stream using a specified charset encoding. The stream is transformed using a {@link CharsetEncoder} object,
+ * guaranteeing that all charset encodings supported by the JRE are handled correctly. In particular for charsets such
+ * as UTF-16, the implementation ensures that one and only one byte order marker is produced.
+ * <p>
+ * Since in general it is not possible to predict the number of characters to be read from the {@link Reader} to satisfy
+ * a read request on the {@link ReaderInputStream}, all reads from the {@link Reader} are buffered. There is therefore
+ * no well defined correlation between the current position of the {@link Reader} and that of the
+ * {@link ReaderInputStream}. This also implies that in general there is no need to wrap the underlying {@link Reader}
+ * in a {@link java.io.BufferedReader}.
+ * </p>
+ * <p>
+ * {@link ReaderInputStream} implements the inverse transformation of {@link java.io.InputStreamReader}; in the
+ * following example, reading from {@code in2} would return the same byte sequence as reading from {@code in} (provided
+ * that the initial byte sequence is legal with respect to the charset encoding):
+ * </p>
+ *
+ * <pre>
+ * InputStream inputStream = ...
+ * Charset cs = ...
+ * InputStreamReader reader = new InputStreamReader(inputStream, cs);
+ * ReaderInputStream in2 = new ReaderInputStream(reader, cs);
+ * </pre>
+ * <p>
+ * {@link ReaderInputStream} implements the same transformation as {@link java.io.OutputStreamWriter}, except that the
+ * control flow is reversed: both classes transform a character stream into a byte stream, but
+ * {@link java.io.OutputStreamWriter} pushes data to the underlying stream, while {@link ReaderInputStream} pulls it
+ * from the underlying stream.
+ * </p>
+ * <p>
+ * Note that while there are use cases where there is no alternative to using this class, very often the need to use
+ * this class is an indication of a flaw in the design of the code. This class is typically used in situations where an
+ * existing API only accepts an {@link InputStream}, but where the most natural way to produce the data is as a
+ * character stream, i.e. by providing a {@link Reader} instance. An example of a situation where this problem may
+ * appear is when implementing the {@code javax.activation.DataSource} interface from the Java Activation Framework.
+ * </p>
+ * <p>
+ * Given the fact that the {@link Reader} class doesn't provide any way to predict whether the next read operation will
+ * block or not, it is not possible to provide a meaningful implementation of the {@link InputStream#available()}
+ * method. A call to this method will always return 0. Also, this class doesn't support {@link InputStream#mark(int)}.
+ * </p>
+ * <p>
+ * Instances of {@link ReaderInputStream} are not thread safe.
+ * </p>
+ *
+ * @since 2.0
+ */
+public class ReaderInputStream extends InputStream {
+    private static final int DEFAULT_BUFFER_SIZE = 1024;
+    
+    static int checkMinBufferSize(final CharsetEncoder charsetEncoder, final int bufferSize) {
+        final float minRequired = minBufferSize(charsetEncoder);
+        if (bufferSize < minRequired) {
+            throw new IllegalArgumentException(
+                    String.format("Buffer size %,d must be at least %s for a CharsetEncoder %s.", bufferSize, minRequired, charsetEncoder.charset().displayName()));
+        }
+        return bufferSize;
+    }
+    
+    static float minBufferSize(final CharsetEncoder charsetEncoder) {
+        return charsetEncoder.maxBytesPerChar() * 2;
+    }
+    
+    private final Reader reader;
+    
+    private final CharsetEncoder charsetEncoder;
+    
+    /**
+     * CharBuffer used as input for the decoder. It should be reasonably large as we read data from the underlying Reader
+     * into this buffer.
+     */
+    private final CharBuffer encoderIn;
+    /**
+     * ByteBuffer used as output for the decoder. This buffer can be small as it is only used to transfer data from the
+     * decoder to the buffer provided by the caller.
+     */
+    private final ByteBuffer encoderOut;
+    
+    private CoderResult lastCoderResult;
+    
+    private boolean endOfInput;
+    
+    /**
+     * Constructs a new {@link ReaderInputStream} that uses the default character encoding with a default input buffer size
+     * of {@value #DEFAULT_BUFFER_SIZE} characters.
+     *
+     * @param reader the target {@link Reader}
+     * @deprecated 2.5 use {@link #ReaderInputStream(Reader, Charset)} instead
+     */
+    @Deprecated
+    public ReaderInputStream(final Reader reader) {
+        this(reader, Charset.defaultCharset());
+    }
+    
+    /**
+     * Constructs a new {@link ReaderInputStream} with a default input buffer size of {@value #DEFAULT_BUFFER_SIZE}
+     * characters.
+     *
+     * @param reader the target {@link Reader}
+     * @param charset the charset encoding
+     */
+    public ReaderInputStream(final Reader reader, final Charset charset) {
+        this(reader, charset, DEFAULT_BUFFER_SIZE);
+    }
+    
+    /**
+     * Constructs a new {@link ReaderInputStream}.
+     *
+     * @param reader the target {@link Reader}.
+     * @param charset the charset encoding.
+     * @param bufferSize the size of the input buffer in number of characters.
+     */
+    public ReaderInputStream(final Reader reader, final Charset charset, final int bufferSize) {
+        // @formatter:off
+        this(reader,
+                toCharset(charset).newEncoder()
+                        .onMalformedInput(CodingErrorAction.REPLACE)
+                        .onUnmappableCharacter(CodingErrorAction.REPLACE),
+                bufferSize);
+        // @formatter:on
+    }
+    
+    /**
+     * Constructs a new {@link ReaderInputStream}.
+     *
+     * @param reader the target {@link Reader}
+     * @param charsetEncoder the charset encoder
+     * @since 2.1
+     */
+    public ReaderInputStream(final Reader reader, final CharsetEncoder charsetEncoder) {
+        this(reader, charsetEncoder, DEFAULT_BUFFER_SIZE);
+    }
+    
+    /**
+     * Constructs a new {@link ReaderInputStream}.
+     *
+     * @param reader the target {@link Reader}
+     * @param charsetEncoder the charset encoder, null defauls to the default Charset encoder.
+     * @param bufferSize the size of the input buffer in number of characters
+     * @since 2.1
+     */
+    public ReaderInputStream(final Reader reader, final CharsetEncoder charsetEncoder, final int bufferSize) {
+        this.reader = reader;
+        this.charsetEncoder = toCharsetEncoder(charsetEncoder);
+        this.encoderIn = CharBuffer.allocate(checkMinBufferSize(this.charsetEncoder, bufferSize));
+        this.encoderIn.flip();
+        this.encoderOut = ByteBuffer.allocate(128);
+        this.encoderOut.flip();
+    }
+    
+    /**
+     * Constructs a new {@link ReaderInputStream} with a default input buffer size of {@value #DEFAULT_BUFFER_SIZE}
+     * characters.
+     *
+     * @param reader the target {@link Reader}
+     * @param charsetName the name of the charset encoding
+     */
+    public ReaderInputStream(final Reader reader, final String charsetName) {
+        this(reader, charsetName, DEFAULT_BUFFER_SIZE);
+    }
+    
+    /**
+     * Constructs a new {@link ReaderInputStream}.
+     *
+     * @param reader the target {@link Reader}
+     * @param charsetName the name of the charset encoding, null maps to the default Charset.
+     * @param bufferSize the size of the input buffer in number of characters
+     */
+    public ReaderInputStream(final Reader reader, final String charsetName, final int bufferSize) {
+        this(reader, toCharset(charsetName), bufferSize);
+    }
+    
+    /**
+     * Close the stream. This method will cause the underlying {@link Reader} to be closed.
+     *
+     * @throws IOException if an I/O error occurs.
+     */
+    @Override
+    public void close() throws IOException {
+        reader.close();
+    }
+    
+    /**
+     * Fills the internal char buffer from the reader.
+     *
+     * @throws IOException If an I/O error occurs
+     */
+    private void fillBuffer() throws IOException {
+        if (!endOfInput && (lastCoderResult == null || lastCoderResult.isUnderflow())) {
+            encoderIn.compact();
+            final int position = encoderIn.position();
+            // We don't use Reader#read(CharBuffer) here because it is more efficient
+            // to write directly to the underlying char array (the default implementation
+            // copies data to a temporary char array).
+            final int c = reader.read(encoderIn.array(), position, encoderIn.remaining());
+            if (c == -1) {
+                endOfInput = true;
+            } else {
+                encoderIn.position(position + c);
+            }
+            encoderIn.flip();
+        }
+        encoderOut.compact();
+        lastCoderResult = charsetEncoder.encode(encoderIn, encoderOut, endOfInput);
+        if (endOfInput) {
+            lastCoderResult = charsetEncoder.flush(encoderOut);
+        }
+        if (lastCoderResult.isError()) {
+            lastCoderResult.throwException();
+        }
+        encoderOut.flip();
+    }
+    
+    /**
+     * Gets the CharsetEncoder.
+     *
+     * @return the CharsetEncoder.
+     */
+    CharsetEncoder getCharsetEncoder() {
+        return charsetEncoder;
+    }
+    
+    /**
+     * Read a single byte.
+     *
+     * @return either the byte read or {@code -1} if the end of the stream has been reached
+     * @throws IOException if an I/O error occurs.
+     */
+    @Override
+    public int read() throws IOException {
+        for (;;) {
+            if (encoderOut.hasRemaining()) {
+                return encoderOut.get() & 0xFF;
+            }
+            fillBuffer();
+            if (endOfInput && !encoderOut.hasRemaining()) {
+                return -1;
+            }
+        }
+    }
+    
+    /**
+     * Read the specified number of bytes into an array.
+     *
+     * @param b the byte array to read into
+     * @return the number of bytes read or {@code -1} if the end of the stream has been reached
+     * @throws IOException if an I/O error occurs.
+     */
+    @Override
+    public int read(final byte[] b) throws IOException {
+        return read(b, 0, b.length);
+    }
+    
+    /**
+     * Read the specified number of bytes into an array.
+     *
+     * @param array the byte array to read into
+     * @param off the offset to start reading bytes into
+     * @param len the number of bytes to read
+     * @return the number of bytes read or {@code -1} if the end of the stream has been reached
+     * @throws IOException if an I/O error occurs.
+     */
+    @Override
+    public int read(final byte[] array, int off, int len) throws IOException {
+        Objects.requireNonNull(array, "array");
+        if (len < 0 || off < 0 || (off + len) > array.length) {
+            throw new IndexOutOfBoundsException("Array size=" + array.length + ", offset=" + off + ", length=" + len);
+        }
+        int read = 0;
+        if (len == 0) {
+            return 0; // Always return 0 if len == 0
+        }
+        while (len > 0) {
+            if (encoderOut.hasRemaining()) { // Data from the last read not fully copied
+                final int c = Math.min(encoderOut.remaining(), len);
+                encoderOut.get(array, off, c);
+                off += c;
+                len -= c;
+                read += c;
+            } else if (endOfInput) { // Already reach EOF in the last read
+                break;
+            } else { // Read again
+                fillBuffer();
+            }
+        }
+        return read == 0 && endOfInput ? -1 : read;
+    }
+    
+    static Charset toCharset(final Charset charset) {
+        return charset == null ? Charset.defaultCharset() : charset;
+    }
+    
+    static Charset toCharset(final String charsetName) throws UnsupportedCharsetException {
+        return charsetName == null ? Charset.defaultCharset() : Charset.forName(charsetName);
+    }
+    
+    static CharsetEncoder toCharsetEncoder(CharsetEncoder charsetEncoder) {
+        return charsetEncoder != null ? charsetEncoder : Charset.defaultCharset().newEncoder();
+    }
+}
\ No newline at end of file
diff --git a/editor/.gitignore b/editor/.gitignore
new file mode 100644
index 000000000..42afabfd2
--- /dev/null
+++ b/editor/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/editor/build.gradle b/editor/build.gradle
new file mode 100644
index 000000000..e09054797
--- /dev/null
+++ b/editor/build.gradle
@@ -0,0 +1,45 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+plugins {
+    id 'com.android.library'
+}
+
+android {
+    compileSdkVersion rootProject.ext.compileSdk
+    buildToolsVersion rootProject.ext.buildTools
+
+    defaultConfig {
+        minSdkVersion rootProject.ext.minSdk
+        targetSdkVersion rootProject.ext.targetSdk
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility rootProject.ext.javaSourceVersion
+        targetCompatibility rootProject.ext.javaTargetVersion
+    }
+}
+
+dependencies {
+    implementation androidx.annotation
+}
\ No newline at end of file
diff --git a/editor/consumer-rules.pro b/editor/consumer-rules.pro
new file mode 100644
index 000000000..e69de29bb
diff --git a/editor/proguard-rules.pro b/editor/proguard-rules.pro
new file mode 100644
index 000000000..481bb4348
--- /dev/null
+++ b/editor/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/editor/src/androidTest/java/io/github/rosemoe/sora/ExampleInstrumentedTest.java b/editor/src/androidTest/java/io/github/rosemoe/sora/ExampleInstrumentedTest.java
new file mode 100644
index 000000000..390664c1e
--- /dev/null
+++ b/editor/src/androidTest/java/io/github/rosemoe/sora/ExampleInstrumentedTest.java
@@ -0,0 +1,43 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package io.github.rosemoe.sora;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext () {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation ().getTargetContext ();
+        assertEquals ("io.github.rosemoe.sora.test", appContext.getPackageName ());
+    }
+}
\ No newline at end of file
diff --git a/editor/src/main/AndroidManifest.xml b/editor/src/main/AndroidManifest.xml
new file mode 100644
index 000000000..98f3b8999
--- /dev/null
+++ b/editor/src/main/AndroidManifest.xml
@@ -0,0 +1,28 @@
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<manifest package="io.github.rosemoe.sora">
+
+
+</manifest>
\ No newline at end of file
diff --git a/editor/src/main/java/io/github/rosemoe/sora/annotations/Experimental.java b/editor/src/main/java/io/github/rosemoe/sora/annotations/Experimental.java
new file mode 100644
index 000000000..3796d523a
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/annotations/Experimental.java
@@ -0,0 +1,40 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * This annotation marks those fields, methods and constructors experimentally created.
+ * <p>
+ * Methods, fields and constructors with this annotation is very subject to keep or delete.
+ * For that reason, they are not stable for production use.
+ */
+@Target({ElementType.FIELD, ElementType.CONSTRUCTOR, ElementType.METHOD, ElementType.TYPE})
+@Retention(RetentionPolicy.SOURCE)
+public @interface Experimental {
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/annotations/UnsupportedUserUsage.java b/editor/src/main/java/io/github/rosemoe/sora/annotations/UnsupportedUserUsage.java
new file mode 100644
index 000000000..060bc296a
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/annotations/UnsupportedUserUsage.java
@@ -0,0 +1,38 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Marks that this member is internally used and that it is not recommended using this
+ * member at your side.
+ */
+@Retention(RetentionPolicy.CLASS)
+@Target({ElementType.METHOD, ElementType.FIELD, ElementType.CONSTRUCTOR, ElementType.TYPE})
+public @interface UnsupportedUserUsage {
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/data/NavigationItem.java b/editor/src/main/java/io/github/rosemoe/sora/data/NavigationItem.java
new file mode 100644
index 000000000..79f61efad
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/data/NavigationItem.java
@@ -0,0 +1,55 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.data;
+
+/**
+ * Model for code navigation
+ *
+ * @author Rose
+ */
+@SuppressWarnings("CanBeFinal")
+public class NavigationItem {
+
+    /**
+     * The line position
+     */
+    public int line;
+
+    /**
+     * The description
+     */
+    public String label;
+
+    /**
+     * Create a new navigation
+     *
+     * @param line  The line position
+     * @param label The description
+     */
+    public NavigationItem(int line, String label) {
+        this.line = line;
+        this.label = label;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/data/ObjectAllocator.java b/editor/src/main/java/io/github/rosemoe/sora/data/ObjectAllocator.java
new file mode 100644
index 000000000..5d31ec9fd
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/data/ObjectAllocator.java
@@ -0,0 +1,82 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.data;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import io.github.rosemoe.sora.lang.styling.CodeBlock;
+
+/**
+ * An object provider for speed improvement
+ * Now meaningless because it is not as well as it expected
+ *
+ * @author Rose
+ */
+public class ObjectAllocator {
+
+    private static final int RECYCLE_LIMIT = 1024 * 8;
+    private static List<CodeBlock> codeBlocks;
+    private static List<CodeBlock> tempArray;
+
+    public static void recycleBlockLines(List<CodeBlock> src) {
+        if (src == null) {
+            return;
+        }
+        if (codeBlocks == null) {
+            codeBlocks = src;
+            return;
+        }
+        int size = codeBlocks.size();
+        int sizeAnother = src.size();
+        while (sizeAnother > 0 && size < RECYCLE_LIMIT) {
+            size++;
+            sizeAnother--;
+            var obj = src.get(sizeAnother);
+            obj.clear();
+            codeBlocks.add(obj);
+        }
+        src.clear();
+        synchronized (ObjectAllocator.class) {
+            tempArray = src;
+        }
+    }
+
+    public static List<CodeBlock> obtainList() {
+        List<CodeBlock> temp = null;
+        synchronized (ObjectAllocator.class) {
+            temp = tempArray;
+            tempArray = null;
+        }
+        if (temp == null) {
+            temp = new ArrayList<>(128);
+        }
+        return temp;
+    }
+
+    public static CodeBlock obtainBlockLine() {
+        return (codeBlocks == null || codeBlocks.isEmpty()) ? new CodeBlock() : codeBlocks.remove(codeBlocks.size() - 1);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/ClickEvent.java b/editor/src/main/java/io/github/rosemoe/sora/event/ClickEvent.java
new file mode 100644
index 000000000..ad75c6430
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/ClickEvent.java
@@ -0,0 +1,79 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import android.view.MotionEvent;
+
+import androidx.annotation.NonNull;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Report a single click
+ */
+public class ClickEvent extends Event {
+
+    private final CharPosition pos;
+    private final MotionEvent event;
+
+    public ClickEvent(@NonNull CodeEditor editor, CharPosition position, MotionEvent event) {
+        super(editor);
+        this.pos = position;
+        this.event = event;
+    }
+
+    @Override
+    public boolean canIntercept() {
+        return true;
+    }
+
+    public int getLine() {
+        return pos.line;
+    }
+
+    public int getColumn() {
+        return pos.column;
+    }
+
+    public int getIndex() {
+        return pos.index;
+    }
+
+    public float getX() {
+        return event.getX();
+    }
+
+    public float getY() {
+        return event.getY();
+    }
+
+    /**
+     * Get original event object from Android framework
+     */
+    public MotionEvent getCausingEvent() {
+        return event;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/ContentChangeEvent.java b/editor/src/main/java/io/github/rosemoe/sora/event/ContentChangeEvent.java
new file mode 100644
index 000000000..e36d88f71
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/ContentChangeEvent.java
@@ -0,0 +1,105 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * This event happens when {@link CodeEditor#setText(CharSequence)} is called or
+ * user edited the displaying content.
+ *
+ * Note that you should not update the content at this time. Otherwise, there might be some
+ * exceptions causing the editor framework to crash. If you do need to update the content, you should
+ * post your actions to the main thread so that the user's modification will be successful.
+ */
+public class ContentChangeEvent extends Event {
+
+    /**
+     * Notify that {@link CodeEditor#setText(CharSequence)} is called
+     */
+    public final static int ACTION_SET_NEW_TEXT = 1;
+
+    /**
+     * Notify that user inserted some texts to the content
+     */
+    public final static int ACTION_INSERT = 2;
+
+    /**
+     * Notify that user deleted some texts in the content
+     */
+    public final static int ACTION_DELETE = 3;
+
+    private final int mAction;
+    private final CharPosition mStart;
+    private final CharPosition mEnd;
+    private final CharSequence mTextChanged;
+
+    public ContentChangeEvent(CodeEditor editor, int action, CharPosition changeStart, CharPosition changeEnd, CharSequence textChanged) {
+        super(editor);
+        mAction = action;
+        mStart = changeStart;
+        mEnd = changeEnd;
+        mTextChanged = textChanged;
+    }
+
+    /**
+     * Get action code of the event.
+     * @see #ACTION_SET_NEW_TEXT
+     * @see #ACTION_INSERT
+     * @see #ACTION_DELETE
+     */
+    public int getAction() {
+        return mAction;
+    }
+
+    /**
+     * Return the CharPosition indicating the start of changed region.
+     *
+     * Note that you can not modify the values in the returned instance.
+     */
+    public CharPosition getChangeStart() {
+        return mStart;
+    }
+
+    /**
+     * Return the CharPosition indicating the end of changed region.
+     *
+     * Note that you can not modify the values in the returned instance.
+     */
+    public CharPosition getChangeEnd() {
+        return mEnd;
+    }
+
+    /**
+     * Return the changed text in this modification.
+     * If action is {@link #ACTION_SET_NEW_TEXT}, Content instance is returned.
+     * If action is {@link #ACTION_INSERT}, inserted text is the result.
+     * If action is {@link #ACTION_DELETE}, deleted text is the result.
+     */
+    public CharSequence getChangedText() {
+        return mTextChanged;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/Event.java b/editor/src/main/java/io/github/rosemoe/sora/event/Event.java
new file mode 100644
index 000000000..e0160c16a
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/Event.java
@@ -0,0 +1,98 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import androidx.annotation.NonNull;
+
+import java.util.Objects;
+
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * An Event object describes an event of editor.
+ * It includes several attributes such as time and the editor object.
+ * Subclasses of Event will define their own fields or methods.
+ *
+ * @author Rosemoe
+ */
+public abstract class Event {
+
+    private final long mEventTime;
+    private final CodeEditor mEditor;
+    private boolean mIntercepted;
+
+    public Event(@NonNull CodeEditor editor) {
+        this(editor, System.currentTimeMillis());
+    }
+
+    public Event(@NonNull CodeEditor editor, long eventTime) {
+        mEditor = Objects.requireNonNull(editor);
+        mEventTime = eventTime;
+        mIntercepted = false;
+    }
+
+    /**
+     * Get event time
+     */
+    public long getEventTime() {
+        return mEventTime;
+    }
+
+    /**
+     * Get the editor
+     */
+    @NonNull
+    public CodeEditor getEditor() {
+        return mEditor;
+    }
+
+    /*
+     * Check whether this event can be intercepted (so that the event is not sent to other
+     * receivers after being intercepted)
+     */
+    public boolean canIntercept() {
+        return false;
+    }
+
+    /**
+     * Intercept the event.
+     *
+     * Make sure {@link #canIntercept()} returns true. Otherwise, an {@link UnsupportedOperationException}
+     * will be thrown.
+     */
+    public void intercept() {
+        if (!canIntercept()) {
+            throw new UnsupportedOperationException("intercept() not supported");
+        }
+        mIntercepted = true;
+    }
+
+    /**
+     * Check whether this event is intercepted
+     */
+    public boolean isIntercepted() {
+        return mIntercepted;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/EventManager.java b/editor/src/main/java/io/github/rosemoe/sora/event/EventManager.java
new file mode 100644
index 000000000..201a40b88
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/EventManager.java
@@ -0,0 +1,205 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import androidx.annotation.NonNull;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+/**
+ * This class manages event dispatching in editor.
+ * Users can either register their event receivers here or dispatch event to
+ * the receivers in this manager.
+ *
+ * There may be several EventManagers in one editor instance. For example, each plugin
+ * will have it own EventManager and the editor also has a root event manager for external
+ * listeners.
+ *
+ * Note that the event type must be exact. That's to say, you need to use a terminal class instead
+ * of using its parent classes. For instance, if you register a receiver with the event type {@link Event},
+ * no event will be sent to your receiver.
+ *
+ * @author Rosemoe
+ */
+public class EventManager {
+
+    @SuppressWarnings("rawtypes")
+    private final Map<Class<?>, Receivers> receivers;
+    private final ReadWriteLock lock;
+
+    public EventManager() {
+        receivers = new HashMap<>();
+        lock = new ReentrantReadWriteLock();
+    }
+
+    /**
+     * Get receivers container of a given event type safely
+     */
+    @NonNull
+    @SuppressWarnings("unchecked")
+    private <T extends Event> Receivers<T> getReceivers(@NonNull Class<T> type) {
+        lock.readLock().lock();
+        Receivers<T> result;
+        try {
+            result = receivers.get(type);
+        } finally {
+            lock.readLock().unlock();
+        }
+        if (result == null) {
+            lock.writeLock().lock();
+            try {
+                result = receivers.get(type);
+                if (result == null) {
+                    result = new Receivers<>();
+                    receivers.put(type, result);
+                }
+            } finally {
+                lock.writeLock().unlock();
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Register a receiver of the given event.
+     *
+     * @param eventType Event type to be received
+     * @param receiver Receiver of event
+     * @param <T> Event type
+     */
+    public <T extends Event> void subscribeEvent(Class<T> eventType, EventReceiver<T> receiver) {
+        var receivers = getReceivers(eventType);
+        receivers.lock.writeLock().lock();
+        try {
+            var list = receivers.receivers;
+            if (list.contains(receiver)) {
+                throw new IllegalArgumentException("the receiver is already registered for this type");
+            }
+            list.add(receiver);
+        } finally {
+            receivers.lock.writeLock().unlock();
+        }
+    }
+
+    /**
+     * Dispatch the given event to its receivers registered in this manager.
+     * @param event Event to dispatch
+     * @param <T> Event type
+     * @return Whether the event's intercept flag is set
+     */
+    @SuppressWarnings("unchecked")
+    public <T extends Event> boolean dispatchEvent(T event) {
+        // Safe cast
+        var receivers = getReceivers((Class<T>)event.getClass());
+        receivers.lock.readLock().lock();
+        EventReceiver<T>[] receiverArr;
+        int count;
+        try {
+            count = receivers.receivers.size();
+            receiverArr = obtainBuffer(count);
+            receivers.receivers.toArray(receiverArr);
+        } finally {
+            receivers.lock.readLock().unlock();
+        }
+        List<EventReceiver<T>> unsubscribedReceivers = null;
+        try {
+            Unsubscribe unsubscribe = new Unsubscribe();
+            for (int i = 0;i < count && !event.isIntercepted();i++) {
+                var receiver = receiverArr[i];
+                receiver.onReceive(event, unsubscribe);
+                if (unsubscribe.isUnsubscribed()) {
+                    if (unsubscribedReceivers == null) {
+                        unsubscribedReceivers = new LinkedList<>();
+                    }
+                    unsubscribedReceivers.add(receiver);
+                }
+                unsubscribe.reset();
+            }
+        } finally {
+            if (unsubscribedReceivers != null) {
+                receivers.lock.writeLock().lock();
+                try {
+                    receivers.receivers.removeAll(unsubscribedReceivers);
+                } finally {
+                    receivers.lock.writeLock().unlock();
+                }
+            }
+            recycleBuffer(receiverArr);
+        }
+        return event.isIntercepted();
+    }
+
+    /**
+     * Internal class for saving receivers of each type
+     * @param <T> Event type
+     */
+    private static class Receivers<T extends Event> {
+
+        ReadWriteLock lock = new ReentrantReadWriteLock();
+
+        List<EventReceiver<T>> receivers = new ArrayList<>();
+
+    }
+
+    private final EventReceiver<?>[][] caches = new EventReceiver[10][];
+
+    @SuppressWarnings("unchecked")
+    private <V extends Event> EventReceiver<V>[] obtainBuffer(int size) {
+        EventReceiver<V>[] res = null;
+        synchronized (this) {
+            for (int i = 0;i < caches.length;i++) {
+                if (caches[i] != null && caches[i].length >= size) {
+                    res = (EventReceiver<V>[]) caches[i];
+                    caches[i] = null;
+                    break;
+                }
+            }
+        }
+        if (res == null) {
+            res = new EventReceiver[size];
+        }
+        return res;
+    }
+
+    private synchronized void recycleBuffer(EventReceiver<?>[] array) {
+        if (array == null) {
+            return;
+        }
+        for (int i = 0;i < caches.length;i++) {
+            if (caches[i] == null) {
+                Arrays.fill(array, null);
+                caches[i] = array;
+                break;
+            }
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/EventReceiver.java b/editor/src/main/java/io/github/rosemoe/sora/event/EventReceiver.java
new file mode 100644
index 000000000..ae1cb9338
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/EventReceiver.java
@@ -0,0 +1,30 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+public interface EventReceiver<T extends Event> {
+
+    void onReceive(T event, Unsubscribe unsubscribe);
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/HandleStateChangeEvent.java b/editor/src/main/java/io/github/rosemoe/sora/event/HandleStateChangeEvent.java
new file mode 100644
index 000000000..2c9e3833e
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/HandleStateChangeEvent.java
@@ -0,0 +1,53 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Notifies a selection handle's touch state has changed
+ */
+public class HandleStateChangeEvent extends Event {
+
+    public final static int HANDLE_TYPE_INSERT = 0;
+    public final static int HANDLE_TYPE_LEFT = 1;
+    public final static int HANDLE_TYPE_RIGHT = 2;
+    private final int mWhich;
+    private final boolean isHeld;
+
+    public HandleStateChangeEvent(CodeEditor editor, int which, boolean heldState) {
+        super(editor);
+        mWhich = which;
+        isHeld = heldState;
+    }
+
+    public int getHandleType() {
+        return mWhich;
+    }
+
+    public boolean isHeld() {
+        return isHeld;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/LongPressEvent.java b/editor/src/main/java/io/github/rosemoe/sora/event/LongPressEvent.java
new file mode 100644
index 000000000..4f52d3f0e
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/LongPressEvent.java
@@ -0,0 +1,84 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import android.view.MotionEvent;
+
+import androidx.annotation.NonNull;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Long press event.
+ *
+ * This event can be intercepted so that the editor framework will do nothing (such as selecting a word). You can take over the
+ * procedure. Note that after intercepting an event, it will not be sent to other listeners, either.
+ *
+ * @author Rosemoe
+ */
+public class LongPressEvent extends Event {
+
+    private final CharPosition pos;
+    private final MotionEvent event;
+
+    public LongPressEvent(@NonNull CodeEditor editor, CharPosition position, MotionEvent event) {
+        super(editor);
+        this.pos = position;
+        this.event = event;
+    }
+
+    @Override
+    public boolean canIntercept() {
+        return true;
+    }
+
+    public int getLine() {
+        return pos.line;
+    }
+
+    public int getColumn() {
+        return pos.column;
+    }
+
+    public int getIndex() {
+        return pos.index;
+    }
+
+    public float getX() {
+        return event.getX();
+    }
+
+    public float getY() {
+        return event.getY();
+    }
+
+    /**
+     * Get original event object from Android framework
+     */
+    public MotionEvent getCausingEvent() {
+        return event;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/ScrollEvent.java b/editor/src/main/java/io/github/rosemoe/sora/event/ScrollEvent.java
new file mode 100644
index 000000000..a65e30352
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/ScrollEvent.java
@@ -0,0 +1,108 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Reports a scroll in editor.
+ * The scrolling action can either have run or be running when this event is generated and sent.
+ *
+ * The returned x,y positions are usually positive when over-scrolling is disabled. They represent
+ * the left-top position's pixel in editor.
+ */
+public class ScrollEvent extends Event {
+
+    /**
+     * Caused by thumb's exact movements
+     */
+    public final static int CAUSE_USER_DRAG = 1;
+    /**
+     * Caused by fling after user's movements
+     */
+    public final static int CAUSE_USER_FLING = 2;
+    /**
+     * Caused by calling {@link CodeEditor#ensurePositionVisible(int, int)}.
+     * This can happen when this method is manually called or either the user edits the text
+     */
+    public final static int CAUSE_MAKE_POSITION_VISIBLE = 3;
+    /**
+     * Caused by the user's thumb reaching the edge of editor viewport, which causes the editor to
+     * scroll to move the selection to text currently outside the viewport.
+     */
+    public final static int CAUSE_TEXT_SELECTING = 4;
+
+    public final static int CAUSE_SCALE_TEXT = 5;
+
+    private final int mStartX;
+    private final int mStartY;
+    private final int mEndX;
+    private final int mEndY;
+    private final int mCause;
+
+    public ScrollEvent(CodeEditor editor, int startX, int startY, int endX, int endY, int cause) {
+        super(editor);
+        mStartX = startX;
+        mStartY = startY;
+        mEndX = endX;
+        mEndY = endY;
+        mCause = cause;
+    }
+
+    /**
+     * Get the start x
+     */
+    public int getStartX() {
+        return mStartX;
+    }
+
+    /**
+     * Get the start y
+     */
+    public int getStartY() {
+        return mStartY;
+    }
+
+    /**
+     * Get end x
+     */
+    public int getEndX() {
+        return mEndX;
+    }
+
+    /**
+     * Get end y
+     */
+    public int getEndY() {
+        return mEndY;
+    }
+
+    /**
+     * Get the cause of the scroll
+     */
+    public int getCause() {
+        return mCause;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/SelectionChangeEvent.java b/editor/src/main/java/io/github/rosemoe/sora/event/SelectionChangeEvent.java
new file mode 100644
index 000000000..dac4305cc
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/SelectionChangeEvent.java
@@ -0,0 +1,111 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * This event happens when text is edited by the user, or the user click the view to change the
+ * position of selection. Even when the actual values of CharPosition are not changed, you may receive the event.
+ *
+ * Note that you should not change returned CharPosition objects because they are shared in an event
+ * dispatch.
+ */
+public class SelectionChangeEvent extends Event {
+
+    private final CharPosition left;
+    private final CharPosition right;
+    private final int cause;
+    /**
+     * Unknown cause
+     */
+    public final static int CAUSE_UNKNOWN = 0;
+
+    /**
+     * Selection change caused by text modifications
+     */
+    public final static int CAUSE_TEXT_MODIFICATION = 1;
+
+    /**
+     * Set selection by handle
+     */
+    public final static int CAUSE_SELECTION_HANDLE = 2;
+
+    /**
+     * Set selection by single tap
+     */
+    public final static int CAUSE_TAP = 3;
+
+    /**
+     * Set selection because of {@link android.view.inputmethod.InputConnection#setSelection(int, int)}
+     */
+    public final static int CAUSE_IME = 4;
+
+    /**
+     *  Long press
+     */
+    public final static int CAUSE_LONG_PRESS = 5;
+
+    public SelectionChangeEvent(CodeEditor editor, int cause) {
+        super(editor);
+        var cursor = editor.getText().getCursor();
+        left = cursor.left();
+        right = cursor.right();
+        this.cause = cause;
+    }
+
+    /**
+     * Get cause of the change
+     * @see #CAUSE_UNKNOWN
+     * @see #CAUSE_TEXT_MODIFICATION
+     * @see #CAUSE_SELECTION_HANDLE
+     * @see #CAUSE_TAP
+     */
+    public int getCause() {
+        return cause;
+    }
+
+    /**
+     * Get the left selection's position
+     */
+    public CharPosition getLeft() {
+        return left;
+    }
+
+    /**
+     * Get the right selection's position
+     */
+    public CharPosition getRight() {
+        return right;
+    }
+
+    /**
+     * Checks whether text is selected
+     */
+    public boolean isSelected() {
+        return left.index != right.index;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/event/Unsubscribe.java b/editor/src/main/java/io/github/rosemoe/sora/event/Unsubscribe.java
new file mode 100644
index 000000000..59639a2bf
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/event/Unsubscribe.java
@@ -0,0 +1,59 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.event;
+
+/**
+ * Instance for unsubscribing for a receiver.
+ *
+ * Note that this instance can be reused during an event dispatch, so
+ * it is not a valid behavior to save the instance in event receivers.
+ * Always use the one given by {@link EventReceiver#onReceive(Event, Unsubscribe)}.
+ */
+public class Unsubscribe {
+
+    private boolean unsubscribeFlag = false;
+
+    /**
+     * Unsubscribe the event. And current receiver will not get event again.
+     * References to the receiver are also removed.
+     */
+    public void unsubscribe() {
+        unsubscribeFlag = true;
+    }
+
+    /**
+     * Checks whether unsubscribe flag is set
+     */
+    public boolean isUnsubscribed() {
+        return unsubscribeFlag;
+    }
+
+    /**
+     * Reset the flag
+     */
+    public void reset() {
+        unsubscribeFlag = false;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/graphics/BufferedDrawPoints.java b/editor/src/main/java/io/github/rosemoe/sora/graphics/BufferedDrawPoints.java
new file mode 100644
index 000000000..927e62dfd
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/graphics/BufferedDrawPoints.java
@@ -0,0 +1,59 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.graphics;
+
+
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+public class BufferedDrawPoints {
+
+    private int pointCount;
+    private float[] points;
+
+    public BufferedDrawPoints() {
+        points = new float[128];
+    }
+
+    public void drawPoint(float cx, float cy) {
+        // Check buffer size and grow
+        if (points.length < (pointCount + 1) * 2) {
+            float[] newBuffer = new float[points.length << 1];
+            System.arraycopy(points, 0, newBuffer, 0, pointCount * 2);
+            points = newBuffer;
+        }
+        points[pointCount * 2] = cx;
+        points[pointCount * 2 + 1] = cy;
+        pointCount++;
+    }
+
+    public void commitPoints(Canvas canvas, Paint paint) {
+        if (pointCount == 0) {
+            return;
+        }
+        canvas.drawPoints(points, 0, pointCount * 2, paint);
+        pointCount = 0;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/graphics/GraphicTextRow.java b/editor/src/main/java/io/github/rosemoe/sora/graphics/GraphicTextRow.java
new file mode 100644
index 000000000..16347aae5
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/graphics/GraphicTextRow.java
@@ -0,0 +1,301 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.graphics;
+
+import static io.github.rosemoe.sora.lang.styling.TextStyle.isBold;
+import static io.github.rosemoe.sora.lang.styling.TextStyle.isItalics;
+
+import android.annotation.SuppressLint;
+
+import java.util.List;
+
+import io.github.rosemoe.sora.lang.styling.Span;
+import io.github.rosemoe.sora.text.ContentLine;
+
+public class GraphicTextRow {
+
+    private final static float SKEW_X = -0.2f;
+    private final Paint mPaint = new Paint();
+    private ContentLine mText;
+    private int mStart;
+    private int mEnd;
+    private int mTabWidth;
+    private List<Span> mSpans;
+    private final float[] mBuffer;
+
+    private final static GraphicTextRow[] sCached = new GraphicTextRow[5];
+
+    private GraphicTextRow() {
+        mBuffer = new float[2];
+    }
+
+    public static GraphicTextRow obtain() {
+        GraphicTextRow st;
+        synchronized (sCached) {
+            for (int i = sCached.length; --i >= 0; ) {
+                if (sCached[i] != null) {
+                    st = sCached[i];
+                    sCached[i] = null;
+                    return st;
+                }
+            }
+        }
+        st = new GraphicTextRow();
+        return st;
+    }
+
+    public static void recycle(GraphicTextRow st) {
+        st.mText = null;
+        st.mSpans = null;
+        st.mStart = st.mEnd = st.mTabWidth = 0;
+        synchronized (sCached) {
+            for (int i = 0; i < sCached.length; ++i) {
+                if (sCached[i] == null) {
+                    sCached[i] = st;
+                    break;
+                }
+            }
+        }
+    }
+
+    public void set(ContentLine line, int start, int end, int tabWidth, List<Span> spans, Paint paint) {
+        if (mPaint.getTextSize() != paint.getTextSize())
+            mPaint.setTextSizeWrapped(paint.getTextSize());
+        var typeface = paint.getTypeface();
+        if (mPaint.getTypeface() != typeface) {
+            mPaint.setTypefaceWrapped(typeface);
+        }
+        if (paint.getFontFeatureSettings() != null)
+            mPaint.setFontFeatureSettingsWrapped(paint.getFontFeatureSettings());
+        mText = line;
+        mTabWidth = tabWidth;
+        mStart = start;
+        mEnd = end;
+        mSpans = spans;
+    }
+
+    public void buildMeasureCache() {
+        if (mText.widthCache == null || mText.widthCache.length < mEnd) {
+            mText.widthCache = new float[Math.max(128, mText.length())];
+        }
+        measureTextInternal(mStart, mEnd, mText.widthCache);
+    }
+
+    /**
+     * From {@code start} to measure characters, until measured width add next char's width is bigger
+     * than {@code advance}.
+     *
+     * Note that the result array should not be stored.
+     *
+     * @return Element 0 is offset, Element 1 is measured width
+     */
+    public float[] findOffsetByAdvance(int start, float advance) {
+        if (mText.widthCache != null) {
+            float w = 0f;
+            var cache = mText.widthCache;
+            for (int i = start; i < mEnd;i++) {
+                if (w > advance) {
+                    mBuffer[0] = Math.max(start, i - 1);
+                    mBuffer[1] = i > start ? w - cache[i - 1] : w;
+                    return mBuffer;
+                } else {
+                    w += cache[i];
+                }
+            }
+            mBuffer[0] = mEnd;
+            mBuffer[1] = w;
+            return mBuffer;
+        }
+        int regionStart = start;
+        int index = 0;
+        // Skip leading spans
+        while (index < mSpans.size() && mSpans.get(index).column < regionStart) {
+            index++;
+        }
+        float currentPosition = 0f;
+        // Find in each region
+        var lastStyle = 0L;
+        var chars = mText.value;
+        float tabAdvance = mPaint.getSpaceWidth() * mTabWidth;
+        int offset = start;
+        while (index <= mSpans.size() && currentPosition < advance) {
+            var regionEnd = index < mSpans.size() ? mSpans.get(index).column : mEnd;
+            regionEnd = Math.min(mEnd, regionEnd);
+            int styleSpanIndex = Math.max(0, index - 1);
+            var style = mSpans.get(styleSpanIndex).getStyleBits();
+            if (style != lastStyle) {
+                if (isBold(style) != isBold(lastStyle)) {
+                    mPaint.setFakeBoldText(isBold(style));
+                }
+                if (isItalics(style) != isItalics(lastStyle)) {
+                    mPaint.setTextSkewX(isItalics(style) ? SKEW_X : 0f);
+                }
+                lastStyle = style;
+            }
+
+            // Find in sub-region
+            int res = -1;
+            {
+                int lastStart = regionStart;
+                for (int i = regionStart; i < regionEnd; i++) {
+                    if (chars[i] == '\t') {
+                        // Here is a tab
+                        // Try to find advance
+                        if (lastStart != i) {
+                            int idx = mPaint.findOffsetByRunAdvance(mText, lastStart, i, advance - currentPosition);
+                            currentPosition += mPaint.measureTextRunAdvance(chars, lastStart, idx, regionStart, regionEnd);
+                            if (idx < i) {
+                                res = idx;
+                                break;
+                            } else {
+                                if (currentPosition + tabAdvance > advance) {
+                                    res = i;
+                                    break;
+                                } else {
+                                    currentPosition += tabAdvance;
+                                }
+                            }
+                        } else {
+                            if (currentPosition + tabAdvance > advance) {
+                                res = i;
+                                break;
+                            } else {
+                                currentPosition += tabAdvance;
+                            }
+                        }
+                        lastStart = i + 1;
+                    }
+                }
+                if (res == -1) {
+                    int idx = mPaint.findOffsetByRunAdvance(mText, lastStart, regionEnd, advance - currentPosition);
+                    currentPosition += measureText(lastStart, idx);
+                    res = idx;
+                }
+            }
+
+            offset = res;
+            if (res < regionEnd) {
+                break;
+            }
+
+            index ++;
+            regionStart = regionEnd;
+            if (regionEnd == mEnd) {
+                break;
+            }
+        }
+        if (lastStyle != 0L) {
+            mPaint.setFakeBoldText(false);
+            mPaint.setTextSkewX(0f);
+        }
+        if (currentPosition > advance && offset > start) {
+            offset--;
+            currentPosition -= measureText(offset, offset + 1);
+        }
+        mBuffer[0] = offset;
+        mBuffer[1] = currentPosition;
+        return mBuffer;
+    }
+
+    public float measureText(int start, int end) {
+        if (start == end) {
+            return 0f;
+        }
+        if (mText.widthCache != null) {
+            float width = 0f;
+            var cache = mText.widthCache;
+            for (int i = start;i < end;i++) {
+                width += cache[i];
+            }
+            return width;
+        }
+        return measureTextInternal(start, end, null);
+    }
+
+    private float measureTextInternal(int start, int end, float[] widths) {
+        start = Math.max(start, mStart);
+        end = Math.min(end, mEnd);
+        if (mSpans.size() == 0) {
+            throw new IllegalArgumentException("At least one span is needed");
+        }
+        int regionStart = start;
+        int index = 0;
+        // Skip leading spans
+        while (index < mSpans.size() && mSpans.get(index).column < regionStart) {
+            index++;
+        }
+        float width = 0f;
+        // Measure for each region
+        var lastStyle = 0L;
+        while (index <= mSpans.size()) {
+            var regionEnd = index < mSpans.size() ? mSpans.get(index).column : mEnd;
+            regionEnd = Math.min(end, regionEnd);
+            int styleSpanIndex = Math.max(0, index - 1);
+            var style = mSpans.get(styleSpanIndex).getStyleBits();
+            if (style != lastStyle) {
+                if (isBold(style) != isBold(lastStyle)) {
+                    mPaint.setFakeBoldText(isBold(style));
+                }
+                if (isItalics(style) != isItalics(lastStyle)) {
+                    mPaint.setTextSkewX(isItalics(style) ? SKEW_X : 0f);
+                }
+                lastStyle = style;
+            }
+            width += measureTextInner(regionStart, regionEnd, widths);
+            index++;
+            regionStart = regionEnd;
+            if (regionEnd == end) {
+                break;
+            }
+        }
+        if (lastStyle != 0L) {
+            mPaint.setFakeBoldText(false);
+            mPaint.setTextSkewX(0f);
+        }
+        return width;
+    }
+
+    @SuppressLint("NewApi")
+    private float measureTextInner(int start, int end, float[] widths) {
+        if (start == end) {
+            return 0f;
+        }
+        // Can be called directly
+        float width = mPaint.getTextRunAdvances(mText.value, start, end - start, start, end - start, false, widths, widths == null ? 0 : start);
+        float tabWidth = mPaint.getSpaceWidth() * mTabWidth;
+        int tabCount = 0;
+        for (int i = start; i < end; i++) {
+            if (mText.charAt(i) == '\t') {
+                tabCount++;
+                if (widths != null) {
+                    widths[i] = tabWidth;
+                }
+            }
+        }
+        float extraWidth = tabCount == 0 ? 0 : tabWidth - mPaint.measureText("\t");
+        return width + extraWidth * tabCount;
+    }
+
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/graphics/Paint.java b/editor/src/main/java/io/github/rosemoe/sora/graphics/Paint.java
new file mode 100644
index 000000000..ea75acff2
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/graphics/Paint.java
@@ -0,0 +1,102 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.graphics;
+
+import android.annotation.SuppressLint;
+import android.graphics.Typeface;
+import android.os.Build;
+
+import io.github.rosemoe.sora.text.ContentLine;
+
+public class Paint extends android.graphics.Paint {
+
+    private float spaceWidth;
+
+    public Paint() {
+        super();
+        spaceWidth = measureText(" ");
+    }
+
+    public float getSpaceWidth() {
+        return spaceWidth;
+    }
+
+    public void setTypefaceWrapped(Typeface typeface) {
+        super.setTypeface(typeface);
+        spaceWidth = measureText(" ");
+    }
+
+    public void setTextSizeWrapped(float textSize) {
+        super.setTextSize(textSize);
+        spaceWidth = measureText(" ");
+    }
+
+    public void setFontFeatureSettingsWrapped(String settings) {
+        super.setFontFeatureSettings(settings);
+        spaceWidth = measureText(" ");
+    }
+
+    @Override
+    public void set(android.graphics.Paint src) {
+        super.set(src);
+        spaceWidth = measureText(" ");
+    }
+
+    /**
+     * Get the advance of text with the context positions related to shaping the characters
+     */
+    @SuppressLint("NewApi")
+    public float measureTextRunAdvance(char[] text, int start, int end, int contextStart, int contextEnd) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            return getRunAdvance(text, start, end, contextStart, contextEnd, false, end);
+        } else {
+            // Hidden, but we can call it directly on Android 21 - 22
+            return getTextRunAdvances(text, start, end - start, contextStart, contextEnd - contextStart, false, null, 0);
+        }
+    }
+
+    /**
+     * Find offset for a certain advance returned by {@link #measureTextRunAdvance(char[], int, int, int, int)}
+     */
+    public int findOffsetByRunAdvance(ContentLine text, int start, int end, float advance) {
+        if (text.widthCache != null) {
+            var cache = text.widthCache;
+            var offset = start;
+            var currAdvance = 0f;
+            for (;offset < end && currAdvance < advance;offset++) {
+                currAdvance += cache[offset];
+            }
+            if (currAdvance > advance) {
+                offset--;
+            }
+            return Math.max(offset, start);
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            return getOffsetForAdvance(text, start, end, start, end, false, advance);
+        } else {
+            return start + breakText(text.value, start, end - start, advance, null);
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/interfaces/ExternalRenderer.java b/editor/src/main/java/io/github/rosemoe/sora/interfaces/ExternalRenderer.java
new file mode 100644
index 000000000..bf74667d2
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/interfaces/ExternalRenderer.java
@@ -0,0 +1,68 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.interfaces;
+
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+import io.github.rosemoe.sora.annotations.Experimental;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * External renderer for spans.
+ * <p>
+ * Users can attach this renderer to any span so that you can draw
+ * extra content inside the rectangle on canvas of the span.
+ * <p>
+ * However, any implementation of this class should not create many new objects
+ * in its methods but initialize your required resources when the renderer is
+ * created.
+ * <p>
+ * Meanwhile, the renderer should be consistent with editor's current
+ * color scheme. Use colors defined in your color schemes if possible.
+ * <p>
+ * Also try to create universal renderers for a certain effect.
+ * <p>
+ * Note: the Paint object should not be modified or used to draw objects on the canvas
+ * It is only provided for measuring. Use another Paint created by yourself instead.
+ *
+ * @author Rosemoe
+ */
+@Experimental
+public interface ExternalRenderer {
+
+    boolean requirePreDraw();
+
+    boolean requirePostDraw();
+
+    /**
+     * Called when the editor draws the given region.
+     * @param canvas The canvas to draw
+     * @param paint Paint for measuring
+     * @param colorScheme Current color scheme
+     * @param preOrPost True for preDraw, False for postDraw
+     */
+    void draw(Canvas canvas, Paint paint, EditorColorScheme colorScheme, boolean preOrPost);
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/EmptyLanguage.java b/editor/src/main/java/io/github/rosemoe/sora/lang/EmptyLanguage.java
new file mode 100644
index 000000000..866479490
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/EmptyLanguage.java
@@ -0,0 +1,129 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang;
+
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.analysis.StyleReceiver;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.widget.SymbolPairMatch;
+
+/**
+ * Empty language
+ *
+ * @author Rosemoe
+ */
+public class EmptyLanguage implements Language {
+
+    @Override
+    public CharSequence format(CharSequence text) {
+        return text;
+    }
+
+    @Override
+    public SymbolPairMatch getSymbolPairs() {
+        return new SymbolPairMatch.DefaultSymbolPairs();
+    }
+
+    @Override
+    public void requireAutoComplete(@NonNull ContentReference content, @NonNull CharPosition position, @NonNull CompletionPublisher publisher, @NonNull Bundle extraArguments) {
+
+    }
+
+    @Override
+    public int getInterruptionLevel() {
+        return INTERRUPTION_LEVEL_STRONG;
+    }
+
+    @Override
+    public NewlineHandler[] getNewlineHandlers() {
+        return new NewlineHandler[0];
+    }
+
+    @NonNull
+    @Override
+    public AnalyzeManager getAnalyzeManager() {
+        return EmptyAnalyzeManager.INSTANCE;
+    }
+
+    @Override
+    public int getIndentAdvance(@NonNull ContentReference content, int line, int column) {
+        return 0;
+    }
+
+    @Override
+    public void destroy() {
+
+    }
+
+    @Override
+    public boolean useTab() {
+        return false;
+    }
+
+
+
+    public static class EmptyAnalyzeManager implements AnalyzeManager {
+
+        public final static EmptyAnalyzeManager INSTANCE = new EmptyAnalyzeManager();
+
+        @Override
+        public void setReceiver(@Nullable StyleReceiver receiver) {
+
+        }
+
+        @Override
+        public void reset(@NonNull ContentReference content, @NonNull Bundle extraArguments) {
+
+        }
+
+        @Override
+        public void insert(CharPosition start, CharPosition end, CharSequence insertedContent) {
+
+        }
+
+        @Override
+        public void delete(CharPosition start, CharPosition end, CharSequence deletedContent) {
+
+        }
+
+        @Override
+        public void rerun() {
+
+        }
+
+        @Override
+        public void destroy() {
+
+        }
+    }
+}
+
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/Language.java b/editor/src/main/java/io/github/rosemoe/sora/lang/Language.java
new file mode 100644
index 000000000..a3c1547bf
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/Language.java
@@ -0,0 +1,165 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang;
+
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.completion.CompletionCancelledException;
+import io.github.rosemoe.sora.lang.completion.CompletionHelper;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.widget.SymbolPairMatch;
+
+/**
+ * Language for editor
+ * <p>
+ * A Language helps editor to highlight text and provide auto-completion.
+ * Implement this interface when you want to add new language support for editor.
+ * <p>
+ * <strong>NOTE:</strong> A language must not be single instance.
+ * One language instance should always serve for only one editor.
+ * It means that you should not give one language object to other editor instances
+ * after it has been applied to one editor.
+ *
+ * @author Rosemoe
+ */
+public interface Language {
+
+    /**
+     * Set the thread's interrupted flag by calling {@link Thread#interrupt()}.
+     *
+     * Throw {@link io.github.rosemoe.sora.lang.completion.CompletionCancelledException} exceptions
+     * from {@link ContentReference} and {@link CompletionPublisher}.
+     *
+     * Set thread's flag for abortion.
+     */
+    int INTERRUPTION_LEVEL_STRONG = 0;
+    /**
+     * Throw {@link io.github.rosemoe.sora.lang.completion.CompletionCancelledException} exceptions
+     * from {@link ContentReference} and {@link CompletionPublisher}.
+     *
+     * Set thread's flag for abortion.
+     */
+    int INTERRUPTION_LEVEL_SLIGHT = 1;
+    /**
+     * Throw {@link io.github.rosemoe.sora.lang.completion.CompletionCancelledException} exceptions
+     * from {@link ContentReference}
+     *
+     * Set thread's flag for abortion.
+     */
+    int INTERRUPTION_LEVEL_NONE = 2;
+
+    /**
+     * Get {@link AnalyzeManager} of the language.
+     * This is called from time to time by the editor. Cache your instance please.
+     */
+    @NonNull
+    AnalyzeManager getAnalyzeManager();
+
+    /**
+     * Get the interruption level for auto-completion.
+     *
+     * @see #INTERRUPTION_LEVEL_STRONG
+     * @see #INTERRUPTION_LEVEL_SLIGHT
+     * @see #INTERRUPTION_LEVEL_NONE
+     */
+    int getInterruptionLevel();
+
+    /**
+     * Request to auto-complete the code at the given {@code position}.
+     * This is called in a worker thread other than UI thread.
+     *
+     * @see ContentReference
+     * @see CompletionPublisher
+     * @see #getInterruptionLevel()
+     * @see CompletionHelper#checkCancelled()
+     * @param content Read-only reference of content
+     * @param position The position for auto-complete
+     * @param publisher The publisher used to update items
+     * @param extraArguments Arguments set by {@link io.github.rosemoe.sora.widget.CodeEditor#setText(CharSequence, Bundle)}
+     * @throws io.github.rosemoe.sora.lang.completion.CompletionCancelledException This thread can be abandoned
+     * by the editor framework because the auto-completion items of
+     *  this invocation are no longer needed by the user. This can either be thrown
+     * by {@link ContentReference} or {@link CompletionPublisher}. How the exceptions will be thrown is according to
+     * your settings: {@link #getInterruptionLevel()}
+     */
+    @WorkerThread
+    void requireAutoComplete(@NonNull ContentReference content, @NonNull CharPosition position,
+                             @NonNull CompletionPublisher publisher,
+                             @NonNull Bundle extraArguments) throws CompletionCancelledException;
+
+    /**
+     * Get advance for indent
+     *
+     * @param content Content of a line
+     * @return Advance space count
+     */
+    @UiThread
+    int getIndentAdvance(@NonNull ContentReference content, int line, int column);
+
+    /**
+     * Use tab to format
+     */
+    @UiThread
+    boolean useTab();
+
+    /**
+     * Format the given content
+     *
+     * @param text Content to format
+     * @return Formatted code
+     */
+    @WorkerThread
+    CharSequence format(CharSequence text);
+
+    /**
+     * Returns language specified symbol pairs.
+     * The method is called only once when the language is applied.
+     */
+    @UiThread
+    SymbolPairMatch getSymbolPairs();
+
+    /**
+     * Get newline handlers of this language.
+     * This method is called each time the user presses ENTER key.
+     * <p>
+     * Pay attention to the performance as this method is called frequently
+     *
+     * @return NewlineHandlers , maybe null
+     */
+    @UiThread
+    @Nullable
+    NewlineHandler[] getNewlineHandlers();
+
+    void destroy();
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AnalyzeManager.java b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AnalyzeManager.java
new file mode 100644
index 000000000..d84085930
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AnalyzeManager.java
@@ -0,0 +1,95 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.analysis;
+
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * AnalyzeManager receives text updates and do its work to start lexers/parsers to analyze the code
+ * so that we can provide syntax-highlighting and exact auto-completion.
+ *
+ * @author Rosemoe
+ */
+public interface AnalyzeManager {
+
+    /**
+     * Set the span receiver of the manager.
+     *
+     * This is called when the {@link io.github.rosemoe.sora.lang.Language} is going to be used by
+     * an editor. It will also be called when the instance is no longer used.
+     * Make sure you check the exact receiver at the time you send results to it.
+     * Thus, you should save the instance at your side.
+     */
+    void setReceiver(@Nullable StyleReceiver receiver);
+
+    /**
+     * Called when new text is set in editor by either {@link CodeEditor#setText(CharSequence)}
+     * or {@link CodeEditor#setText(CharSequence, Bundle).}
+     * @param content New text, read-only. Accesses to it are not validated. It is not recommended saving
+     *                this object for reading. You can make a copy of the text and update it. But for
+     *                memory saving, you may want to store it.
+     * @param extraArguments  Arguments set by {@link CodeEditor#setText(CharSequence, Bundle)}
+     */
+    void reset(@NonNull ContentReference content, @NonNull Bundle extraArguments);
+
+    /**
+     * The {@link ContentReference} set by {@link #reset(ContentReference, Bundle)} has inserted
+     * text with the given position and text.
+     *
+     * @param start       The insertion start
+     * @param end         The insertion end
+     * @param insertedContent The content inserted
+     */
+    void insert(CharPosition start, CharPosition end, CharSequence insertedContent);
+
+    /**
+     * The {@link ContentReference} set by {@link #reset(ContentReference, Bundle)} has deleted
+     *  text with the given position and text.
+     *
+     * @param start      The deletion start
+     * @param end        The deletion end
+     * @param deletedContent The text deleted. Generated by {@link Content} object.
+     */
+    void delete(CharPosition start, CharPosition end, CharSequence deletedContent);
+
+    /**
+     * Rerun the analysis forcibly
+     */
+    void rerun();
+
+    /**
+     * Destroy the manager. Release any resources held.
+     * Make sure that you will not call the receiver anymore.
+     */
+    void destroy();
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AsyncIncrementalAnalyzeManager.java b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AsyncIncrementalAnalyzeManager.java
new file mode 100644
index 000000000..7717ba4d9
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/AsyncIncrementalAnalyzeManager.java
@@ -0,0 +1,475 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.analysis;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+
+import androidx.annotation.NonNull;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import io.github.rosemoe.sora.lang.styling.CodeBlock;
+import io.github.rosemoe.sora.lang.styling.Span;
+import io.github.rosemoe.sora.lang.styling.Spans;
+import io.github.rosemoe.sora.lang.styling.Styles;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.util.IntPair;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+public abstract class AsyncIncrementalAnalyzeManager<S, T> implements IncrementalAnalyzeManager<S, T> {
+
+    private StyleReceiver receiver;
+    private ContentReference ref;
+    private Bundle extraArguments;
+    private LooperThread thread;
+    private final static int MSG_BASE = 11451400;
+    private final static int MSG_INIT = MSG_BASE + 1;
+    private final static int MSG_MOD = MSG_BASE + 2;
+    private final static int MSG_EXIT = MSG_BASE + 3;
+
+    @Override
+    public void setReceiver(StyleReceiver receiver) {
+        this.receiver = receiver;
+    }
+
+    @Override
+    public void reset(@NonNull ContentReference content, @NonNull Bundle extraArguments) {
+        this.ref = content;
+        this.extraArguments = extraArguments;
+        rerun();
+    }
+
+    @Override
+    public void insert(CharPosition start, CharPosition end, CharSequence insertedText) {
+        if (thread != null) {
+            thread.handler.sendMessage(thread.handler.obtainMessage(MSG_MOD, new TextModification(IntPair.pack(start.line, start.column), IntPair.pack(end.line, end.column), insertedText)));
+            sendUpdate(thread.styles);
+        }
+    }
+
+    @Override
+    public void delete(CharPosition start, CharPosition end, CharSequence deletedText) {
+        if (thread != null) {
+            thread.handler.sendMessage(thread.handler.obtainMessage(MSG_MOD, new TextModification(IntPair.pack(start.line, start.column), IntPair.pack(end.line, end.column), null)));
+            sendUpdate(thread.styles);
+        }
+    }
+
+    @Override
+    public void rerun() {
+        if (thread != null) {
+            thread.callback = () -> { throw new CancelledException(); };
+            if (thread.isAlive()) {
+                thread.handler.sendMessage(Message.obtain(thread.handler, MSG_EXIT));
+                thread.abort = true;
+            }
+        }
+        final var text = ref.getReference().copyText();
+        text.setUndoEnabled(false);
+        thread = new LooperThread(() -> thread.handler.sendMessage(thread.handler.obtainMessage(MSG_INIT, text)));
+        thread.start();
+        sendUpdate(null);
+    }
+
+    @Override
+    public void destroy() {
+        if (thread != null) {
+            thread.callback = () -> { throw new CancelledException(); };
+            if (thread.isAlive()) {
+                thread.handler.sendMessage(Message.obtain(thread.handler, MSG_EXIT));
+                thread.abort = true;
+            }
+        }
+        receiver = null;
+        ref = null;
+        extraArguments = null;
+        thread = null;
+    }
+
+    private void sendUpdate(Styles styles) {
+        final var r = receiver;
+        if (r != null) {
+            r.setStyles(this, styles);
+        }
+    }
+
+    /**
+     * Compute code blocks
+     * @param text The text. can be safely accessed.
+     */
+    public abstract List<CodeBlock> computeBlocks(Content text);
+
+    public Bundle getExtraArguments() {
+        return extraArguments;
+    }
+
+    private class LooperThread extends Thread {
+
+        volatile boolean abort;
+        Looper looper;
+        Handler handler;
+        Content shadowed;
+
+        List<LineTokenizeResult<S, T>> states = new ArrayList<>();
+        Styles styles;
+        LockedSpans spans;
+        private Runnable callback;
+
+        public LooperThread(Runnable callback) {
+            this.callback = callback;
+        }
+
+        private void tryUpdate() {
+            if (!abort)
+                sendUpdate(styles);
+        }
+
+        private void initialize() {
+            styles = new Styles(spans = new LockedSpans());
+            S state = getInitialState();
+            var mdf = spans.modify();
+            for (int i = 0;i < ref.getLineCount();i++) {
+                var result = tokenizeLine(ref.getLine(i), state);
+                state = result.state;
+                var spans = result.spans != null ? result. spans :generateSpansForLine(result);
+                states.add(result.clearSpans());
+                mdf.addLineAt(i, spans);
+            }
+            styles.blocks = computeBlocks(shadowed);
+            tryUpdate();
+        }
+
+        @Override
+        public void run() {
+            Looper.prepare();
+            looper = Looper.myLooper();
+            handler = new Handler(looper) {
+
+                @Override
+                public void handleMessage(@NonNull Message msg) {
+                    super.handleMessage(msg);
+                    try {
+                        switch (msg.what) {
+                            case MSG_INIT:
+                                shadowed = (Content) msg.obj;
+                                if (!abort) {
+                                    initialize();
+                                }
+                                break;
+                            case MSG_MOD:
+                                if (!abort) {
+                                    var mod = (TextModification) msg.obj;
+                                    int startLine = IntPair.getFirst(mod.start);
+                                    int endLine = IntPair.getFirst(mod.end);
+                                    if (mod.changedText == null) {
+                                        shadowed.delete(IntPair.getFirst(mod.start), IntPair.getSecond(mod.start),
+                                                IntPair.getFirst(mod.end), IntPair.getSecond(mod.end));
+                                        S state = startLine == 0 ? getInitialState() : states.get(startLine - 1).state;
+                                        // Remove states
+                                        if (endLine >= startLine + 1) {
+                                            states.subList(startLine + 1, endLine + 1).clear();
+                                        }
+                                        var mdf = spans.modify();
+                                        for (int i = startLine + 1;i <= endLine;i++) {
+                                            mdf.deleteLineAt(startLine + 1);
+                                        }
+                                        int line = startLine;
+                                        while (line < shadowed.getLineCount()){
+                                            var res = tokenizeLine(shadowed.getLine(line), state);
+                                            mdf.setSpansOnLine(line, res.spans != null ? res.spans : generateSpansForLine(res));
+                                            var old = states.set(line, res.clearSpans());
+                                            if (stateEquals(old.state, res.state)) {
+                                                break;
+                                            }
+                                            state = res.state;
+                                            line ++;
+                                        }
+                                    } else {
+                                        shadowed.insert(IntPair.getFirst(mod.start), IntPair.getSecond(mod.start), mod.changedText);
+                                        S state = startLine == 0 ? getInitialState() : states.get(startLine - 1).state;
+                                        int line = startLine;
+                                        var spans = styles.spans.modify();
+                                        // Add Lines
+                                        while (line <= endLine) {
+                                            var res = tokenizeLine(shadowed.getLine(line), state);
+                                            if (line == startLine) {
+                                                spans.setSpansOnLine(line, res.spans != null ? res.spans : generateSpansForLine(res));
+                                                states.set(line, res.clearSpans());
+                                            } else {
+                                                spans.addLineAt(line, res.spans != null ? res.spans : generateSpansForLine(res));
+                                                states.add(line, res.clearSpans());
+                                            }
+                                            state = res.state;
+                                            line++;
+                                        }
+                                        // line = end.line + 1, check whether the state equals
+                                        while (line < shadowed.getLineCount()) {
+                                            var res = tokenizeLine(shadowed.getLine(line), state);
+                                            if (stateEquals(res.state, states.get(line).state)) {
+                                                break;
+                                            } else {
+                                                spans.setSpansOnLine(line, res.spans != null ? res.spans : generateSpansForLine(res));
+                                                states.set(line, res.clearSpans());
+                                            }
+                                            line ++;
+                                        }
+                                    }
+                                }
+                                styles.blocks = computeBlocks(shadowed);
+                                tryUpdate();
+                                break;
+                            case MSG_EXIT:
+                                looper.quit();
+                                break;
+                        }
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                }
+
+            };
+
+            try {
+                callback.run();
+                Looper.loop();
+            } catch (CancelledException e) {
+                //ignored
+            }
+        }
+    }
+
+    private static class LockedSpans implements Spans {
+
+        private final Lock lock;
+        private final List<Line> lines;
+
+        public LockedSpans() {
+            lines = new ArrayList<>(128);
+            lock = new ReentrantLock();
+        }
+
+        @Override
+        public void adjustOnDelete(CharPosition start, CharPosition end) {
+
+        }
+
+        @Override
+        public void adjustOnInsert(CharPosition start, CharPosition end) {
+
+        }
+
+        @Override
+        public Reader read() {
+            return new ReaderImpl();
+        }
+
+        @Override
+        public Modifier modify() {
+            return new ModifierImpl();
+        }
+
+        @Override 
+        public boolean supportsModify() {
+            return true;
+        }
+
+        private static class Line {
+
+            public Lock lock = new ReentrantLock();
+
+            public List<Span> spans;
+
+            public Line() {
+                this(null);
+            }
+
+            public Line(List<Span> s) {
+                spans = s;
+            }
+
+        }
+
+        private class ReaderImpl implements Spans.Reader {
+
+            private Line line;
+
+            public void moveToLine(int line) {
+                if (line < 0) {
+                    if (this.line != null) {
+                        this.line.lock.unlock();
+                    }
+                    this.line = null;
+                } else if (line >= lines.size()) {
+                    if (this.line != null) {
+                        this.line.lock.unlock();
+                    }
+                    this.line = null;
+                } else {
+                    if (this.line != null) {
+                        this.line.lock.unlock();
+                    }
+                    var locked = false;
+                    try {
+                        locked = lock.tryLock(1, TimeUnit.MILLISECONDS);
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                    if (locked) {
+                        try {
+                            var obj = lines.get(line);
+                            if (obj.lock.tryLock()) {
+                                this.line = obj;
+                            } else {
+                                this.line = null;
+                            }
+                        } finally {
+                            lock.unlock();
+                        }
+                    } else {
+                        this.line = null;
+                    }
+                }
+            }
+
+            @Override
+            public int getSpanCount() {
+                return line == null ? 1 : line.spans.size();
+            }
+
+            @Override
+            public Span getSpanAt(int index) {
+                return line == null ? Span.obtain(0, EditorColorScheme.TEXT_NORMAL) : line.spans.get(index);
+            }
+
+            @Override
+            public List<Span> getSpansOnLine(int line) {
+                var spans = new ArrayList<Span>();
+                var locked = false;
+                try {
+                    locked = lock.tryLock(1, TimeUnit.MILLISECONDS);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+                if (locked) {
+                    Line obj = null;
+                    try {
+                        if (line < lines.size()) {
+                            obj = lines.get(line);
+                        }
+                    } finally {
+                        lock.unlock();
+                    }
+                    if (obj != null && obj.lock.tryLock()) {
+                        try {
+                            for (var span : obj.spans) {
+                                spans.add(span.copy());
+                            }
+                        } finally {
+                            obj.lock.unlock();
+                        }
+                    } else {
+                        spans.add(getSpanAt(0));
+                    }
+                } else {
+                    spans.add(getSpanAt(0));
+                }
+                return spans;
+            }
+        }
+
+        private class ModifierImpl implements Modifier {
+
+            @Override
+            public void setSpansOnLine(int line, List<Span> spans) {
+                lock.lock();
+                try {
+                    while (lines.size() <= line) {
+                        var list = new ArrayList<Span>();
+                        list.add(Span.obtain(0, EditorColorScheme.TEXT_NORMAL));
+                        lines.add(new Line(list));
+                    }
+                    lines.get(line).spans = spans;
+                } finally {
+                    lock.unlock();
+                }
+            }
+
+            @Override
+            public void addLineAt(int line, List<Span> spans) {
+                lock.lock();
+                try {
+                    lines.add(line, new Line(spans));
+                } finally {
+                    lock.unlock();
+                }
+            }
+
+            @Override
+            public void deleteLineAt(int line) {
+                lock.lock();
+                try {
+                    var obj = lines.get(line);
+                    obj.lock.lock();
+                    try {
+                        lines.remove(line);
+                    } finally {
+                        obj.lock.unlock();
+                    }
+                } finally {
+                    lock.unlock();
+                }
+            }
+        }
+
+    }
+
+    private static class TextModification {
+
+        private final long start;
+        private final long end;
+        /**
+         * null for deletion
+         */
+        private final CharSequence changedText;
+
+        TextModification(long start, long end, CharSequence text) {
+            this.start = start;
+            this.end = end;
+            changedText = text;
+        }
+    }
+
+    private static class CancelledException extends RuntimeException {}
+
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/IncrementalAnalyzeManager.java b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/IncrementalAnalyzeManager.java
new file mode 100644
index 000000000..0cd1f1830
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/IncrementalAnalyzeManager.java
@@ -0,0 +1,102 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.analysis;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.List;
+
+import io.github.rosemoe.sora.lang.styling.Span;
+
+/**
+ * Interface for line based analyze managers
+ * @param <S> State type at line endings
+ * @param <T> Token type
+ */
+public interface IncrementalAnalyzeManager<S, T> extends AnalyzeManager {
+
+    /**
+     * Get the initial at document start
+     */
+    S getInitialState();
+
+    /**
+     * Compare the two states.
+     * Return true if they equal
+     */
+    boolean stateEquals(S state, S another);
+
+    /**
+     * Tokenize for the given line
+     */
+    LineTokenizeResult<S, T> tokenizeLine(CharSequence line, S state);
+
+    /**
+     * Generate spans for the line
+     */
+    List<Span> generateSpansForLine(LineTokenizeResult<S, T> tokens);
+
+    /**
+     * Saved state
+     */
+    class LineTokenizeResult<S_, T_> {
+
+        /**
+         * State at line end
+         */
+        public S_ state;
+
+        /**
+         * Tokens on this line
+         */
+        public List<T_> tokens;
+
+        /**
+         * Spans. If spans are generated as well you can directly return them here to avoid
+         * {@link #generateSpansForLine(LineTokenizeResult)} calls.
+         */
+        public List<Span> spans;
+
+        public LineTokenizeResult(@NonNull S_ state, @Nullable List<T_> tokens) {
+            this.state = state;
+            this.tokens = tokens;
+        }
+
+        public LineTokenizeResult(@NonNull S_ state, @Nullable List<T_> tokens, @Nullable List<Span> spans) {
+            this.state = state;
+            this.tokens = tokens;
+            this.spans = spans;
+        }
+
+        protected LineTokenizeResult<S_, T_> clearSpans() {
+            spans = null;
+            return this;
+        }
+
+    }
+
+
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/SimpleAnalyzeManager.java b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/SimpleAnalyzeManager.java
new file mode 100644
index 000000000..36a319392
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/SimpleAnalyzeManager.java
@@ -0,0 +1,231 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.analysis;
+
+import android.os.Bundle;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import io.github.rosemoe.sora.lang.styling.Styles;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+
+/**
+ * Built-in implementation of {@link AnalyzeManager}.
+ *
+ * This is a simple version without any incremental actions.
+ *
+ * The analysis will always re-run when the text changes. Hopefully, it will stop previous outdated
+ * runs by provide a {@link Delegate} object.
+ * @param <V> The shared object type that we get for auto-completion.
+ */
+public abstract class SimpleAnalyzeManager<V> implements AnalyzeManager {
+
+    private final static String LOG_TAG = "SimpleAnalyzeManager";
+    private static int sThreadId = 0;
+
+    private StyleReceiver receiver;
+    private ContentReference ref;
+    private Bundle extraArguments;
+    private volatile long newestRequestId;
+    private AnalyzeThread thread;
+    private final Object lock = new Object();
+    private V data;
+
+    @Override
+    public void setReceiver(@NonNull StyleReceiver receiver) {
+        this.receiver = receiver;
+    }
+
+    @Override
+    public void reset(@NonNull ContentReference content, @NonNull Bundle extraArguments) {
+        this.ref = content;
+        this.extraArguments = extraArguments;
+        rerun();
+    }
+
+    @Override
+    public void insert(CharPosition start, CharPosition end, CharSequence insertedContent) {
+        rerun();
+    }
+
+    @Override
+    public void delete(CharPosition start, CharPosition end, CharSequence deletedContent) {
+        rerun();
+    }
+
+    @Override
+    public synchronized void rerun() {
+        newestRequestId ++;
+        if (thread == null || !thread.isAlive()) {
+            // Create new thread
+            Log.v(LOG_TAG, "Starting a new thread for analysis");
+            thread = new AnalyzeThread();
+            thread.setDaemon(true);
+            thread.setName("SplAnalyzer-" + nextThreadId());
+            thread.start();
+        }
+        synchronized (lock) {
+            lock.notify();
+        }
+    }
+
+    @Override
+    public void destroy() {
+        ref = null;
+        extraArguments = null;
+        newestRequestId = 0;
+        data = null;
+        if (thread != null && thread.isAlive()) {
+            thread.interrupt();
+        }
+        thread = null;
+    }
+
+    private synchronized static int nextThreadId() {
+        sThreadId++;
+        return sThreadId;
+    }
+
+    /**
+     * Get extra arguments set by {@link io.github.rosemoe.sora.widget.CodeEditor#setText(CharSequence, Bundle)}
+     */
+    public Bundle getExtraArguments() {
+        return extraArguments;
+    }
+
+    /**
+     * Get data set by analyze thread
+     */
+    @Nullable
+    public V getData() {
+        return data;
+    }
+
+    /**
+     * Analyze the given input.
+     *
+     * @param text A {@link StringBuilder} instance containing the text in editor. DO NOT SAVE THE INSTANCE OR
+     *             UPDATE IT. It is continuously used by this analyzer.
+     * @param delegate A delegate used to check whether this invocation is outdated. You should stop your logic
+     *                 if {@link Delegate#isCancelled()} returns true.
+     * @return Styles created according to the text.
+     */
+    protected abstract Styles analyze(StringBuilder text, Delegate<V> delegate);
+
+    /**
+     * Analyze thread.
+     *
+     * The thread will keep alive unless there is any exception or {@link AnalyzeManager#destroy()}
+     * is called.
+     */
+    private class AnalyzeThread extends Thread {
+
+        /**
+         * Single instance for text storing
+         */
+        private final StringBuilder textContainer = new StringBuilder();
+
+        @Override
+        public void run() {
+            Log.v(LOG_TAG, "Analyze thread started");
+            try {
+                while (!isInterrupted()) {
+                    final var text = ref;
+                    if (text != null) {
+                        var requestId = 0L;
+                        Styles result;
+                        V newData;
+                        // Do the analysis, until the requestId matches
+                        do {
+                            requestId = newestRequestId;
+                            var delegate = new Delegate<V>(requestId);
+
+                            // Collect line contents
+                            textContainer.setLength(0);
+                            textContainer.ensureCapacity(text.length());
+                            for (int i = 0;i < text.getLineCount() && requestId == newestRequestId;i++) {
+                                if (i != 0) {
+                                    textContainer.append('\n');
+                                }
+                                text.appendLineTo(textContainer, i);
+                            }
+
+                            // Invoke the implementation
+                            result = analyze(textContainer, delegate);
+                            newData = delegate.data;
+                        } while (requestId != newestRequestId);
+                        // Send result
+                        final var receiver = SimpleAnalyzeManager.this.receiver;
+                        if (receiver != null) {
+                            receiver.setStyles(SimpleAnalyzeManager.this, result);
+                        }
+                        data = newData;
+                    }
+                    // Wait for next time
+                    synchronized (lock) {
+                        lock.wait();
+                    }
+                }
+            } catch (InterruptedException e) {
+                Log.v(LOG_TAG, "Thread is interrupted.");
+            } catch (Exception e) {
+                Log.e(LOG_TAG, "Unexpected exception is thrown in the thread.", e);
+            }
+        }
+
+    }
+
+    /**
+     * Delegate between manager and analysis implementation
+     */
+    public final class Delegate<T> {
+
+        private final long myRequestId;
+        private T data;
+
+        public Delegate(long requestId) {
+            myRequestId = requestId;
+        }
+
+        /**
+         * Set shared data
+         */
+        public void setData(T value) {
+            data = value;
+        }
+
+        /**
+         * Check whether the operation is cancelled
+         */
+        public boolean isCancelled() {
+            return myRequestId != newestRequestId;
+        }
+
+    }
+
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/StyleReceiver.java b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/StyleReceiver.java
new file mode 100644
index 000000000..1e0d49fff
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/StyleReceiver.java
@@ -0,0 +1,45 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.analysis;
+
+import io.github.rosemoe.sora.lang.styling.Styles;
+
+/**
+ * A {@link StyleReceiver} receives spans and other styles from analyzers.
+ *
+ * The implementations of the class must make sure its code can be safely run. For example, update
+ * UI by posting its actions to UI thread, but not here.
+ *
+ * Also, the implementations of the class should pay attention to concurrent invocations due not to
+ * corrupt the information it maintains.
+ */
+public interface StyleReceiver {
+
+    /**
+     * Send the styles to the receiver. You can call it in any thread.
+     * The implementation of this should make sure that concurrent invocations to it are safe.
+     */
+    void setStyles(AnalyzeManager sourceManager, Styles styles);
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/UIThreadIncrementalAnalyzeManager.java b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/UIThreadIncrementalAnalyzeManager.java
new file mode 100644
index 000000000..2ab12fca4
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/analysis/UIThreadIncrementalAnalyzeManager.java
@@ -0,0 +1,156 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.analysis;
+
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import io.github.rosemoe.sora.lang.styling.MappedSpans;
+import io.github.rosemoe.sora.lang.styling.Styles;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+
+/**
+ * Simple implementation of incremental analyze manager.
+ * This class saves states at line endings. It is for simple token-based highlighting, and it can also
+ * save tokens on lines so that they can be reused. However, no code blocks support is provided.
+ *
+ * Note that the analysis is done on UI thread.
+ *
+ */
+public abstract class UIThreadIncrementalAnalyzeManager<S, T> implements IncrementalAnalyzeManager<S, T> {
+
+    private StyleReceiver receiver;
+    /**
+     * This class run actions in main thread. The reference can be safely accessed.
+     */
+    private ContentReference ref;
+    private List<LineTokenizeResult<S, T>> states = new ArrayList<>();
+    private Styles sentStyles;
+
+    @Override
+    public void setReceiver(@Nullable StyleReceiver receiver) {
+        this.receiver = receiver;
+    }
+
+    @Override
+    public void reset(@NonNull ContentReference content, @NonNull Bundle extraArguments) {
+        ref = content;
+        rerun();
+    }
+
+    @Override
+    public void insert(CharPosition start, CharPosition end, CharSequence insertedContent) {
+        S state = start.line == 0 ? getInitialState() : states.get(start.line - 1).state;
+        int line = start.line;
+        var spans = sentStyles.spans.modify();
+        while (line <= end.line) {
+            var res = tokenizeLine(ref.getLine(line), state);
+            spans.setSpansOnLine(line, res.spans != null ? res.spans : generateSpansForLine(res));
+            states.set(line, res.clearSpans());
+            state = res.state;
+            line++;
+        }
+        // line = end.line + 1, check whether the state equals
+        while (line < ref.getLineCount()) {
+            var res = tokenizeLine(ref.getLine(line), state);
+            if (stateEquals(res.state, states.get(line).state)) {
+                break;
+            } else {
+                spans.setSpansOnLine(line, res.spans != null ? res.spans : generateSpansForLine(res));
+                states.set(line, res.clearSpans());
+            }
+            line ++;
+        }
+        receiver.setStyles(this, sentStyles);
+    }
+
+    @Override
+    public void delete(CharPosition start, CharPosition end, CharSequence deletedContent) {
+        S state = start.line == 0 ? getInitialState() : states.get(start.line - 1).state;
+        // Remove states
+        if (end.line >= start.line + 1) {
+            states.subList(start.line + 1, end.line + 1).clear();
+        }
+        int line = start.line;
+        while (line < ref.getLineCount()){
+            var res = tokenizeLine(ref.getLine(line), state);
+            var old = states.set(line, res);
+            var spans = sentStyles.spans.modify();
+            spans.setSpansOnLine(line, res.spans != null ? res.spans : generateSpansForLine(res));
+            if (stateEquals(old.state, res.state)) {
+                break;
+            }
+            state = res.state;
+            line ++;
+        }
+        receiver.setStyles(this, sentStyles);
+    }
+
+    @Override
+    public void rerun() {
+        states.clear();
+        S state = getInitialState();
+        var builder = new MappedSpans.Builder(ref.getLineCount());
+        for (int i = 0;i < ref.getLineCount();i++) {
+            var res = tokenizeLine(ref.getLine(i), state);
+            state = res.state;
+            var spans = res.spans != null ? res.spans : generateSpansForLine(res);
+            states.add(res.clearSpans());
+            for (var span : spans) {
+                builder.add(i, span);
+            }
+        }
+        sentStyles = new Styles(builder.build());
+        sendUpdate();
+    }
+
+    /**
+     * Send the update.
+     *
+     * We always use the same object, but the editor can use a HwAcceleratedRenderer
+     * so that some displaying content may not be updated in the renderer.
+     * So we must call this to notify editor to invalidate its drawing cache.
+     */
+    private void sendUpdate() {
+        final var r = receiver;
+        if (r != null) {
+            r.setStyles(this, sentStyles);
+        }
+    }
+
+    @Override
+    public void destroy() {
+        states = null;
+        receiver = null;
+        sentStyles = null;
+        ref = null;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionCancelledException.java b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionCancelledException.java
new file mode 100644
index 000000000..d7b7ba30c
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionCancelledException.java
@@ -0,0 +1,43 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.completion;
+
+/**
+ * Thrown when the thread is abandoned by the editor framework because the editor do not need its
+ * new items anymore.
+ *
+ * This can be thrown by {@link io.github.rosemoe.sora.text.ContentReference} and
+ * {@link CompletionPublisher}.
+ *
+ * @author Rosemoe
+ */
+public class CompletionCancelledException extends RuntimeException {
+
+    public CompletionCancelledException() {
+    }
+
+    public CompletionCancelledException(String message) {
+        super(message);
+    }
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionHelper.java b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionHelper.java
new file mode 100644
index 000000000..adfb32405
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionHelper.java
@@ -0,0 +1,71 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.completion;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.widget.component.EditorAutoCompletion;
+
+/**
+ * Helper class for completion
+ *
+ * @author Rosemoe
+ */
+public class CompletionHelper {
+
+    /**
+     * Searches backward on the line, with the given checker to check chars.
+     * Returns the longest text that matches the requirement
+     */
+    public static String computePrefix(ContentReference ref, CharPosition pos, PrefixChecker checker) {
+        int begin = pos.column;
+        var line = ref.getLine(pos.line);
+        for (;begin > 0;begin--) {
+            if (!checker.check(line.charAt(begin - 1))) {
+                break;
+            }
+        }
+        return line.substring(begin, pos.column);
+    }
+
+    /**
+     * Check whether the thread is abandoned by editor.
+     * Return true if it is cancelled by editor.
+     */
+    public static boolean checkCancelled() {
+        var thread = Thread.currentThread();
+        if (thread instanceof EditorAutoCompletion.CompletionThread) {
+            return ((EditorAutoCompletion.CompletionThread) thread).isCancelled();
+        } else {
+            return false;
+        }
+    }
+
+    public interface PrefixChecker {
+
+        boolean check(char ch);
+
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionItem.java b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionItem.java
new file mode 100644
index 000000000..16b61a78a
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionItem.java
@@ -0,0 +1,105 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.completion;
+
+import android.graphics.drawable.Drawable;
+
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * The class used to save auto complete result items.
+ * For functionality, this class only manages the information to be displayed in list view.
+ * You can implement {@link CompletionItem#performCompletion(CodeEditor, Content, int, int)} to customize
+ * your own completion method so that you can develop complex actions.
+ *
+ * For the simplest usage, see {@link SimpleCompletionItem}
+ *
+ * @see SimpleCompletionItem
+ * @author Rosemoe
+ */
+@SuppressWarnings("CanBeFinal")
+public abstract class CompletionItem {
+
+    /**
+     * Icon for displaying in adapter
+     */
+    public Drawable icon;
+
+    /**
+     * Text to display as title in adapter
+     */
+    public CharSequence label;
+
+    /**
+     * Text to display as description in adapter
+     */
+    public CharSequence desc;
+
+
+    public CompletionItem(CharSequence label) {
+        this(label, null);
+    }
+
+    public CompletionItem(CharSequence label, CharSequence desc) {
+        this(label, desc, null);
+    }
+
+    public CompletionItem(CharSequence label, CharSequence desc, Drawable icon) {
+        this.label = label;
+        this.desc = desc;
+        this.icon = icon;
+    }
+
+    public CompletionItem label(CharSequence label) {
+        this.label = label;
+        return this;
+    }
+
+    public CompletionItem desc(CharSequence desc) {
+        this.desc = desc;
+        return this;
+    }
+
+    public CompletionItem icon(Drawable icon) {
+        this.icon = icon;
+        return this;
+    }
+
+    /**
+     * Perform this completion.
+     * You can implement custom logic to make your completion better(by updating selection and text
+     * from here).
+     * To make it considered as a single action, the editor will enter batch edit state before invoking
+     * this method. Feel free to update the text by multiple calls to {@code text}.
+     *
+     * @param editor The editor. You can set cursor position with that.
+     * @param text The text in editor. You can make modifications to it.
+     * @param line  The auto-completion line
+     * @param column The auto-completion column
+     */
+    public abstract void performCompletion(CodeEditor editor, Content text, int line, int column);
+
+}
+
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionPublisher.java b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionPublisher.java
new file mode 100644
index 000000000..3f2ed294d
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/CompletionPublisher.java
@@ -0,0 +1,276 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.completion;
+
+import android.os.Handler;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import io.github.rosemoe.sora.annotations.UnsupportedUserUsage;
+import io.github.rosemoe.sora.lang.Language;
+
+/**
+ * CompletionPublisher manages completion items to be added in one completion analyzing process.
+ *
+ * You can only add items to the publisher, but no deletion is allowed. As you add more items, the
+ * publisher will update the list in UI from time to time, which is related to your threshold
+ * settings.({@link CompletionPublisher#setUpdateThreshold(int)}).
+ * There will usually be some items not displayed in screen when the thread is still running. Even
+ * when the actual pending item count exceeds the threshold you set, there may still be some items
+ * not committed because of lock failures. You can use {@link CompletionPublisher#updateList(boolean)}
+ * with forced flag to command the UI thread update the completion list, by waiting for the lock from
+ * your side to release.
+ * If you want to disable this feature, you may want to set it to {@link Integer#MAX_VALUE}
+ *
+ * You can set a comparator by {@link CompletionPublisher#setComparator(Comparator)} to sort your
+ * result items, but you should not make it too complex, which will cause laggy in UI thread. It is
+ * recommended that you set the comparator before all your actions.
+ * Leaving the comparator null results the completion to be unsorted. They will be ordered by the order
+ * you add them.
+ *
+ * After all you additions, you do not need to explicitly invoke {@link CompletionPublisher#updateList(boolean)}.
+ * This will automatically be called by editor framework.
+ *
+ * Note that your actions may be interrupted because of {@link Thread#interrupted()}.
+ */
+public class CompletionPublisher {
+
+    private Comparator<CompletionItem> comparator;
+    private final List<CompletionItem> items;
+    private final List<CompletionItem> candidates;
+    private final Lock lock;
+    private final Handler handler;
+    private int updateThreshold;
+    private boolean invalid = false;
+    private final Runnable callback;
+    private final int languageInterruptionLevel;
+
+    /**
+     * Default value for {@link CompletionPublisher#setUpdateThreshold(int)}
+     */
+    public final static int DEFAULT_UPDATE_THRESHOLD = 5;
+
+    public CompletionPublisher(@NonNull Handler handler, @NonNull Runnable callback, int languageInterruptionLevel) {
+        this.handler = handler;
+        this.items = new ArrayList<>();
+        this.candidates = new ArrayList<>();
+        lock = new ReentrantLock(true);
+        updateThreshold = DEFAULT_UPDATE_THRESHOLD;
+        this.callback = callback;
+        this.languageInterruptionLevel = languageInterruptionLevel;
+    }
+
+    /**
+     * Checks whether there is data
+     */
+    public boolean hasData() {
+        return items.size() + candidates.size() > 0;
+    }
+
+    /**
+     * Get items currently in display
+     */
+    @UnsupportedUserUsage
+    public List<CompletionItem> getItems() {
+        return items;
+    }
+
+    /**
+     * Set the max pending items in analyzing thread.
+     * See class javadoc for more information.
+     */
+    public void setUpdateThreshold(int updateThreshold) {
+        this.updateThreshold = updateThreshold;
+    }
+
+    /**
+     * Set the result's comparator.
+     *
+     * The comparator is used when publishing the completion to user.
+     */
+    public void setComparator(@Nullable Comparator<CompletionItem> comparator) {
+        checkCancelled();
+        if (invalid) {
+            return;
+        }
+        this.comparator = comparator;
+        if (items.size() != 0) {
+            handler.post(() -> {
+                if (invalid) {
+                    return;
+                }
+                if (comparator != null) {
+                    Collections.sort(items, comparator);
+                }
+                callback.run();
+            });
+        }
+    }
+
+    /**
+     * Add items in the completion list.
+     *
+     * According to your settings and the lock's state, these items may not immediately
+     * be displayed to the user.
+     *
+     * @see CompletionPublisher#setUpdateThreshold(int)
+     */
+    public void addItems(Collection<CompletionItem> items) {
+        checkCancelled();
+        if (invalid) {
+            return;
+        }
+        lock.lock();
+        try {
+            candidates.addAll(items);
+        } finally {
+            lock.unlock();
+        }
+        if (candidates.size() >= updateThreshold) {
+            updateList();
+        }
+    }
+
+    /**
+     * Add a single item in completion list.
+     *
+     * According to your settings and the lock's state, this item may not immediately
+     * be displayed to the user.
+     *
+     * @see CompletionPublisher#setUpdateThreshold(int)
+     */
+    public void addItem(CompletionItem item) {
+        checkCancelled();
+        if (invalid) {
+            return;
+        }
+        lock.lock();
+        try {
+            candidates.add(item);
+        } finally {
+            lock.unlock();
+        }
+        if (candidates.size() >= updateThreshold) {
+            updateList();
+        }
+    }
+
+    /**
+     * Try to update completion in main thread.
+     *
+     * If {@link Lock#tryLock()} failed, nothing will happen.
+     */
+    public void updateList() {
+        updateList(false);
+    }
+
+    /**
+     * Update completion items on main thread
+     *
+     * @param forced If true, the main thread will wait for the lock. Otherwise, when the lock is
+     *               currently available for the thread, the update will be executed.
+     */
+    public void updateList(boolean forced) {
+        if (invalid) {
+            return;
+        }
+        handler.post(() -> {
+            // Lock the candidate list accordingly
+            if (invalid) {
+                return;
+            }
+            var locked = false;
+            if (forced) {
+                lock.lock();
+                locked = true;
+            } else {
+                locked = lock.tryLock();
+            }
+
+            if (locked) {
+                try {
+                    if (candidates.size() == 0) {
+                        return;
+                    }
+                    final var comparator = this.comparator;
+                    if (comparator != null) {
+                        while (!candidates.isEmpty()) {
+                            var candidate = candidates.remove(0);
+                            // Insert the value by binary search
+                            int left = 0, right = items.size();
+                            var size = right;
+                            while (left <= right) {
+                                var mid = (left + right) / 2;
+                                if (mid < 0 || mid >= size) {
+                                    left = mid;
+                                    break;
+                                }
+                                var cmp = comparator.compare(items.get(mid), candidate);
+                                if (cmp < 0) {
+                                    left = mid + 1;
+                                } else if (cmp > 0) {
+                                    right = mid - 1;
+                                } else {
+                                    left = mid;
+                                    break;
+                                }
+                            }
+                            left = Math.max(0, Math.min(size, left));
+                            items.add(left, candidate);
+                        }
+                    } else {
+                        items.addAll(candidates);
+                        candidates.clear();
+                    }
+                    callback.run();
+                } finally {
+                    lock.unlock();
+                }
+            }
+        });
+    }
+
+    public void cancel() {
+        invalid = true;
+    }
+
+    private void checkCancelled() {
+        if (Thread.interrupted() || invalid) {
+            invalid = true;
+            if (languageInterruptionLevel <= Language.INTERRUPTION_LEVEL_SLIGHT) {
+                throw new CompletionCancelledException();
+            }
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/completion/IdentifierAutoComplete.java b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/IdentifierAutoComplete.java
new file mode 100644
index 000000000..c12aad7b7
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/IdentifierAutoComplete.java
@@ -0,0 +1,155 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.completion;
+
+import android.os.Bundle;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+
+import io.github.rosemoe.sora.lang.Language;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+
+/**
+ * Identifier auto-completion.
+ *
+ * You can use it to provide identifiers, but you can't update the given {@link CompletionPublisher}
+ * if it is used. If you have to mix the result, then you should call {@link CompletionPublisher#setComparator(Comparator)}
+ * with null first. Otherwise, your completion list may be corrupted. And in that case, you must do the sorting
+ * work by yourself and then add your items.
+ *
+ * @author Rosemoe
+ */
+public class IdentifierAutoComplete {
+
+    private String[] mKeywords;
+    private boolean mKeywordsAreLowCase;
+
+    public IdentifierAutoComplete() {
+    }
+
+    public IdentifierAutoComplete(String[] keywords) {
+        this();
+        setKeywords(keywords, true);
+    }
+
+    public void setKeywords(String[] keywords, boolean lowCase) {
+        mKeywords = keywords;
+        mKeywordsAreLowCase = lowCase;
+    }
+
+    public String[] getKeywords() {
+        return mKeywords;
+    }
+
+    public static class Identifiers {
+
+        private final List<String> identifiers = new ArrayList<>(128);
+        private HashMap<String, Object> cache;
+        private final static Object SIGN = new Object();
+
+        public void addIdentifier(String identifier) {
+            if (cache == null) {
+                throw new IllegalStateException("begin() has not been called");
+            }
+            if (cache.put(identifier, SIGN) == SIGN) {
+                return;
+            }
+            identifiers.add(identifier);
+        }
+
+        public void begin() {
+            cache = new HashMap<>();
+        }
+
+        public void finish() {
+            cache.clear();
+            cache = null;
+        }
+
+        public List<String> getIdentifiers() {
+            return identifiers;
+        }
+
+    }
+
+    /**
+     * Make completion items for the given arguments.
+     * Provide the required arguments passed by {@link Language#requireAutoComplete(ContentReference, CharPosition, CompletionPublisher,  Bundle)}
+     * @param prefix The prefix to make completions for.
+     */
+    public void requireAutoComplete(String prefix, CompletionPublisher publisher, Identifiers userIdentifiers) {
+        publisher.setComparator(COMPARATOR);
+        publisher.setUpdateThreshold(0);
+        int prefixLength = prefix.length();
+        if (prefixLength == 0) {
+            return;
+        }
+        final String[] keywordArray = mKeywords;
+        final boolean lowCase = mKeywordsAreLowCase;
+        String match = prefix.toLowerCase();
+        if (keywordArray != null) {
+            if (lowCase) {
+                for (String kw : keywordArray) {
+                    if (kw.startsWith(match)) {
+                        publisher.addItem(new SimpleCompletionItem(kw, "Keyword", prefixLength, kw));
+                    }
+                }
+            } else {
+                for (String kw : keywordArray) {
+                    if (kw.toLowerCase().startsWith(match)) {
+                        publisher.addItem(new SimpleCompletionItem(kw, "Keyword", prefixLength, kw));
+                    }
+                }
+            }
+        }
+        if (userIdentifiers != null) {
+            List<CompletionItem> words = new ArrayList<>();
+            for (String word : userIdentifiers.getIdentifiers()) {
+                if (word.toLowerCase().startsWith(match)) {
+                    publisher.addItem(new SimpleCompletionItem(word, "Identifier", prefixLength, word));
+                }
+            }
+        }
+    }
+
+    private static String asString(CharSequence str) {
+        return (str instanceof String ? (String) str : str.toString());
+    }
+
+    private final static Comparator<CompletionItem> COMPARATOR = (p1, p2) -> {
+        var cmp1 = asString(p1.desc).compareTo(asString(p2.desc));
+        if (cmp1 < 0) {
+            return 1;
+        } else if (cmp1 > 0) {
+            return -1;
+        }
+        return asString(p1.label).compareTo(asString(p2.label));
+    };
+
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/completion/SimpleCompletionItem.java b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/SimpleCompletionItem.java
new file mode 100644
index 000000000..dc3dfc63d
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/completion/SimpleCompletionItem.java
@@ -0,0 +1,101 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.completion;
+
+import android.graphics.drawable.Drawable;
+
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * SimpleCompletionItem represents a simple replace action for auto-completion.
+ * {@code prefixLength} is the length of prefix (text length you want to replace before the
+ * auto-completion position).
+ * {@code commitText} is the text you want to replace the original text.
+ *
+ * Note that you must make sure the start position of replacement is on the same line as auto-completion's
+ * required position.
+ *
+ * @see CompletionItem
+ */
+public class SimpleCompletionItem extends CompletionItem {
+
+    public int prefixLength;
+    public String commitText;
+
+    public SimpleCompletionItem(int prefixLength, String commitText) {
+        this(commitText, prefixLength, commitText);
+    }
+
+    public SimpleCompletionItem(CharSequence label, int prefixLength, String commitText) {
+        this(label, null, prefixLength, commitText);
+    }
+
+    public SimpleCompletionItem(CharSequence label, CharSequence desc, int prefixLength, String commitText) {
+        this(label, desc, null, prefixLength, commitText);
+    }
+
+    public SimpleCompletionItem(CharSequence label, CharSequence desc, Drawable icon, int prefixLength, String commitText) {
+        super(label, desc, icon);
+        this.commitText = commitText;
+        this.prefixLength = prefixLength;
+    }
+
+    @Override
+    public SimpleCompletionItem desc(CharSequence desc) {
+        super.desc(desc);
+        return this;
+    }
+
+    @Override
+    public SimpleCompletionItem icon(Drawable icon) {
+        super.icon(icon);
+        return this;
+    }
+
+    @Override
+    public SimpleCompletionItem label(CharSequence label) {
+        super.label(label);
+        return this;
+    }
+
+    public SimpleCompletionItem commit(int prefixLength, String commitText) {
+        this.prefixLength = prefixLength;
+        this.commitText = commitText;
+        return this;
+    }
+
+    @Override
+    public void performCompletion(CodeEditor editor, Content text, int line, int column) {
+        if (commitText == null) {
+            return;
+        }
+        if (prefixLength == 0) {
+            text.insert(line, column, commitText);
+            return;
+        }
+        text.replace(line, column - prefixLength, line, column, commitText);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandleResult.java b/editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandleResult.java
new file mode 100644
index 000000000..4907320ca
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandleResult.java
@@ -0,0 +1,46 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.smartEnter;
+
+public class NewlineHandleResult {
+
+    /**
+     * Text to insert
+     */
+    public final CharSequence text;
+
+    /**
+     * Count to shift left from the end of {@link NewlineHandleResult#text}
+     */
+    public final int shiftLeft;
+
+    public NewlineHandleResult(CharSequence text, int shiftLeft) {
+        this.text = text;
+        this.shiftLeft = shiftLeft;
+        if (shiftLeft < 0 || shiftLeft > text.length()) {
+            throw new IllegalArgumentException("invalid shiftLeft");
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandler.java b/editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandler.java
new file mode 100644
index 000000000..06d9e637a
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/smartEnter/NewlineHandler.java
@@ -0,0 +1,49 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.smartEnter;
+
+/**
+ * Perform text processing when user enters '\n' and selection size is 0
+ */
+public interface NewlineHandler {
+
+    /**
+     * Checks whether the given input matches the requirement to invoke this handler
+     *
+     * @param beforeText Text of line before cursor
+     * @param afterText  Text of line after cursor
+     * @return Whether this handler should be called
+     */
+    boolean matchesRequirement(String beforeText, String afterText);
+
+    /**
+     * Handle newline and return processed content to insert
+     *
+     * @param beforeText Text of line before cursor
+     * @param afterText  Text of line after cursor
+     * @return Actual content to insert
+     */
+    NewlineHandleResult handleNewline(String beforeText, String afterText, int tabSize);
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/BlocksUpdater.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/BlocksUpdater.java
new file mode 100644
index 000000000..618c307b3
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/BlocksUpdater.java
@@ -0,0 +1,58 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import java.util.List;
+
+/**
+ * Update block line positions on edit
+ */
+public class BlocksUpdater {
+
+    /**
+     * Update blocks
+     * @param blocks   Block lines to update
+     * @param restrict Min line to update
+     * @param delta Delta for line index
+     */
+    public static void update(List<CodeBlock> blocks, int restrict, int delta) {
+        if (delta == 0) {
+            return;
+        }
+        var itr = blocks.iterator();
+        while(itr.hasNext()) {
+            var block = itr.next();
+            if (block.startLine >= restrict) {
+                block.startLine += delta;
+            }
+            if (block.endLine >= restrict) {
+                block.endLine += delta;
+            }
+            if (block.startLine >= block.endLine) {
+                itr.remove();
+            }
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/CodeBlock.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/CodeBlock.java
new file mode 100644
index 000000000..02b2298f2
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/CodeBlock.java
@@ -0,0 +1,96 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import androidx.annotation.NonNull;
+
+import java.util.Comparator;
+
+/**
+ * Code block info model
+ *
+ * @author Rose
+ */
+public class CodeBlock {
+
+    /**
+     * Start line of code block
+     */
+    public int startLine;
+
+    /**
+     * Start column of code block
+     */
+    public int startColumn;
+
+    /**
+     * End line of code block
+     */
+    public int endLine;
+
+    /**
+     * End column of code block
+     */
+    public int endColumn;
+
+    /**
+     * Indicates that this BlockLine should be drawn vertically until the bottom of its end line
+     */
+    public boolean toBottomOfEndLine;
+
+    public void clear() {
+        startColumn = startLine = endLine = endColumn = 0;
+        toBottomOfEndLine = false;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        return "BlockLine{" +
+                "startLine=" + startLine +
+                ", startColumn=" + startColumn +
+                ", endLine=" + endLine +
+                ", endColumn=" + endColumn +
+                ", toBottomOfEndLine=" + toBottomOfEndLine +
+                '}';
+    }
+
+    public static final Comparator<CodeBlock> COMPARATOR_END = (a, b) ->  {
+        var res = Integer.compare(a.endLine, b.endLine);
+        if (res == 0) {
+            return Integer.compare(a.endColumn, b.endColumn);
+        } else {
+            return res;
+        }
+    };
+
+    public static final Comparator<CodeBlock> COMPARATOR_START = (a, b) ->  {
+        var res = Integer.compare(a.startLine, b.startLine);
+        if (res == 0) {
+            return Integer.compare(a.startColumn, b.startColumn);
+        } else {
+            return res;
+        }
+    };
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/EmptyReader.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/EmptyReader.java
new file mode 100644
index 000000000..55065fe81
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/EmptyReader.java
@@ -0,0 +1,61 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+public class EmptyReader implements Spans.Reader {
+
+    private final List<Span> spans;
+    private boolean moved;
+
+    public EmptyReader() {
+        spans = new ArrayList<>(1);
+        spans.add(Span.obtain(0, EditorColorScheme.TEXT_NORMAL));
+    }
+
+
+    @Override
+    public void moveToLine(int line) {
+
+    }
+
+    @Override
+    public Span getSpanAt(int index) {
+        return spans.get(index);
+    }
+
+    @Override
+    public int getSpanCount() {
+        return 1;
+    }
+
+    @Override
+    public List<Span> getSpansOnLine(int line) {
+        return spans;
+    }
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/ExternalRenderer.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/ExternalRenderer.java
new file mode 100644
index 000000000..3a3efaa20
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/ExternalRenderer.java
@@ -0,0 +1,68 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+import io.github.rosemoe.sora.annotations.Experimental;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * External renderer for spans.
+ * <p>
+ * Users can attach this renderer to any span so that you can draw
+ * extra content inside the rectangle on canvas of the span.
+ * <p>
+ * However, any implementation of this class should not create many new objects
+ * in its methods but initialize your required resources when the renderer is
+ * created.
+ * <p>
+ * Meanwhile, the renderer should be consistent with editor's current
+ * color scheme. Use colors defined in your color schemes if possible.
+ * <p>
+ * Also try to create universal renderers for a certain effect.
+ * <p>
+ * Note: the Paint object should not be modified or used to draw objects on the canvas
+ * It is only provided for measuring. Use another Paint created by yourself instead.
+ *
+ * @author Rosemoe
+ */
+@Experimental
+public interface ExternalRenderer {
+
+    boolean requirePreDraw();
+
+    boolean requirePostDraw();
+
+    /**
+     * Called when the editor draws the given region.
+     * @param canvas The canvas to draw
+     * @param paint Paint for measuring
+     * @param colorScheme Current color scheme
+     * @param preOrPost True for preDraw, False for postDraw
+     */
+    void draw(Canvas canvas, Paint paint, EditorColorScheme colorScheme, boolean preOrPost);
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/SpanMapUpdater.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpanUpdater.java
old mode 100755
new mode 100644
similarity index 62%
rename from app/src/main/java/io/github/rosemoe/editor/text/SpanMapUpdater.java
rename to editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpanUpdater.java
index c23a35a77..dbab89eaa
--- a/app/src/main/java/io/github/rosemoe/editor/text/SpanMapUpdater.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpanUpdater.java
@@ -1,38 +1,41 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.lang.styling;
 
-import io.github.rosemoe.editor.struct.Span;
-import io.github.rosemoe.editor.syntax.EditorColorScheme;
 import java.util.ArrayList;
 import java.util.List;
 
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
 /**
  * Update spans on text change event
  *
  * @author Rose
  */
-public class SpanMapUpdater {
+public class MappedSpanUpdater {
 
     public static void shiftSpansOnMultiLineDelete(List<List<Span>> map, int startLine, int startColumn, int endLine, int endColumn) {
-        
-        if (map == null || map.isEmpty()) {
-            return;
-        }
-        
         int lineCount = endLine - startLine - 1;
         // Remove unrelated lines
         while (lineCount > 0) {
@@ -40,7 +43,7 @@ public class SpanMapUpdater {
             lineCount--;
         }
         // Clean up start line
-        List<Span> startLineSpans = emptyIfNull(map.get(startLine));
+        List<Span> startLineSpans = map.get(startLine);
         int index = startLineSpans.size() - 1;
         while (index > 0) {
             if (startLineSpans.get(index).column >= startColumn) {
@@ -51,36 +54,30 @@ public class SpanMapUpdater {
             }
         }
         // Shift end line
-        List<Span> endLineSpans = emptyIfNull(map.get(startLine + 1));
-        while (endLineSpans.size() > 1) {
-            Span first = endLineSpans.get(0);
-            if (first.column >= endColumn) {
-                break;
-            } else {
-                int spanEnd = endLineSpans.get(1).column;
-                if (spanEnd <= endColumn) {
-                    endLineSpans.remove(first);
-                    first.recycle();
-                } else {
-                    break;
-                }
-            }
-        }
+        List<Span> endLineSpans = map.remove(startLine + 1);
         for (int i = 0; i < endLineSpans.size(); i++) {
             Span span = endLineSpans.get(i);
-            if (span.column < endColumn) {
-                span.column = 0;
+            span.column -= endColumn;
+            span.column += startColumn;
+        }
+        while (endLineSpans.size() > 1) {
+            if (endLineSpans.get(0).column <= startColumn && endLineSpans.get(1).column <= startColumn) {
+                endLineSpans.remove(0).recycle();
             } else {
-                span.column -= endColumn;
+                break;
             }
         }
+        if (endLineSpans.get(0).column <= startColumn) {
+            endLineSpans.get(0).column = startColumn;
+        }
+        startLineSpans.addAll(endLineSpans);
     }
 
     public static void shiftSpansOnSingleLineDelete(List<List<Span>> map, int line, int startCol, int endCol) {
         if (map == null || map.isEmpty()) {
             return;
         }
-        List<Span> spanList = emptyIfNull(map.get(line));
+        List<Span> spanList = map.get(line);
         int startIndex = findSpanIndexFor(spanList, 0, startCol);
         if (startIndex == -1) {
             //No span is to be updated
@@ -103,7 +100,7 @@ public class SpanMapUpdater {
         }
         // Ensure there is span
         if (spanList.isEmpty() || spanList.get(0).column != 0) {
-            spanList.add(0, Span.obtain(line, 0, EditorColorScheme.TEXT_NORMAL));
+            spanList.add(0, Span.obtain(0, EditorColorScheme.TEXT_NORMAL));
         }
         // Remove spans with length 0
         for (int i = 0; i + 1 < spanList.size(); i++) {
@@ -118,7 +115,7 @@ public class SpanMapUpdater {
         if (map == null || map.isEmpty()) {
             return;
         }
-        List<Span> spanList = emptyIfNull( map.get(line));
+        List<Span> spanList = map.get(line);
         int index = findSpanIndexFor(spanList, 0, startCol);
         if (index == -1) {
             return;
@@ -132,17 +129,17 @@ public class SpanMapUpdater {
         // Add extra span for line start
         if (originIndex == 0) {
             Span first = spanList.get(0);
-            if (first.colorId == EditorColorScheme.TEXT_NORMAL && first.underlineColor == 0) {
+            if (first.style == EditorColorScheme.TEXT_NORMAL && first.underlineColor == 0) {
                 first.column = 0;
             } else {
-                spanList.add(0, Span.obtain(line, 0, EditorColorScheme.TEXT_NORMAL));
+                spanList.add(0, Span.obtain(0, EditorColorScheme.TEXT_NORMAL));
             }
         }
     }
 
     public static void shiftSpansOnMultiLineInsert(List<List<Span>> map, int startLine, int startColumn, int endLine, int endColumn) {
         // Find extended span
-        List<Span> startLineSpans = emptyIfNull( map.get(startLine));
+        List<Span> startLineSpans = map.get(startLine);
         int extendedSpanIndex = findSpanIndexFor(startLineSpans, 0, startColumn);
         if (extendedSpanIndex == -1) {
             extendedSpanIndex = startLineSpans.size() - 1;
@@ -152,7 +149,7 @@ public class SpanMapUpdater {
         }
         Span extendedSpan;
         if (extendedSpanIndex < 0 || extendedSpanIndex >= startLineSpans.size()) {
-            extendedSpan = Span.obtain(startLine, 0, EditorColorScheme.TEXT_NORMAL);
+            extendedSpan = Span.obtain(0, EditorColorScheme.TEXT_NORMAL);
         } else {
             extendedSpan = startLineSpans.get(extendedSpanIndex);
         }
@@ -163,22 +160,21 @@ public class SpanMapUpdater {
             map.add(startLine + 1, list);
         }
         // Add original spans to new line
-        List<Span> endLineSpans = emptyIfNull(map.get(endLine));
-        if (endColumn == 0 && extendedSpanIndex + 1 < startLineSpans.size()) {
-            endLineSpans.clear();
+        List<Span> endLineSpans = map.get(endLine);
+        int idx = extendedSpanIndex;
+        while (idx  < startLineSpans.size()) {
+            Span span = startLineSpans.get(idx++);
+            endLineSpans.add(span.copy().setColumn(Math.max(0, span.column - startColumn + endColumn)));
         }
-        int delta = Integer.MIN_VALUE;
         while (extendedSpanIndex + 1 < startLineSpans.size()) {
-            Span span = startLineSpans.remove(extendedSpanIndex + 1);
-            if (delta == Integer.MIN_VALUE) {
-                delta = span.column;
-            }
-            endLineSpans.add(span.setColumn(span.column - delta + endColumn));
+            startLineSpans.remove(startLineSpans.size() - 1).recycle();
+        }
+        if (endLineSpans.size() > 1 && endLineSpans.get(0).column == 0 && endLineSpans.get(1).column == 0) {
+            endLineSpans.remove(0).recycle();
         }
     }
 
     private static int findSpanIndexFor(List<Span> spans, int initialPosition, int targetCol) {
-        spans = emptyIfNull(spans);
         for (int i = initialPosition; i < spans.size(); i++) {
             if (spans.get(i).column >= targetCol) {
                 return i;
@@ -186,13 +182,5 @@ public class SpanMapUpdater {
         }
         return -1;
     }
-    
-    private static <T> List<T> emptyIfNull (List<T> original) {
-        if (original == null) {
-            original = new ArrayList<T>();
-        }
-        
-        return original;
-    }
 
 }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpans.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpans.java
new file mode 100644
index 000000000..882b01705
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/MappedSpans.java
@@ -0,0 +1,309 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import androidx.annotation.NonNull;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * Store spans by map.
+ *
+ * @see Builder
+ */
+public class MappedSpans implements Spans {
+    
+    private final List<List<Span>> spanMap;
+    
+    private MappedSpans(@NonNull List<List<Span>> spanMap) {
+        this.spanMap = spanMap;
+    }
+    
+    @Override
+    public void adjustOnInsert(CharPosition start, CharPosition end) {
+        var startLine = start.line;
+        var endLine = end.line;
+        var startColumn = start.column;
+        var endColumn = end.column;
+        if (startLine == endLine) {
+            MappedSpanUpdater.shiftSpansOnSingleLineInsert(spanMap, startLine, startColumn, endColumn);
+        } else {
+            MappedSpanUpdater.shiftSpansOnMultiLineInsert(spanMap, startLine, startColumn, endLine, endColumn);
+        }
+    }
+
+    @Override
+    public void adjustOnDelete(CharPosition start, CharPosition end) {
+        var startLine = start.line;
+        var endLine = end.line;
+        var startColumn = start.column;
+        var endColumn = end.column;
+        if (startLine == endLine) {
+            MappedSpanUpdater.shiftSpansOnSingleLineDelete(spanMap, startLine, startColumn, endColumn);
+        } else {
+            MappedSpanUpdater.shiftSpansOnMultiLineDelete(spanMap, startLine, startColumn, endLine, endColumn);
+        }
+    }
+
+    @Override
+    public Reader read() {
+        return new Mdf();
+    }
+
+    @Override
+    public boolean supportsModify() {
+        return true;
+    }
+
+    @Override
+    public Modifier modify() {
+        return new Mdf();
+    }
+
+    /**
+     * Allow you to build a span map linearly.
+     */
+    public static class Builder {
+
+        private final List<List<Span>> spans;
+        private Span last;
+        private boolean determined = false;
+
+        public Builder() {
+            this(128);
+        }
+
+        public Builder(int lineCapacity) {
+            spans = new ArrayList<>(lineCapacity);
+        }
+
+        /**
+         * Add a new span if required.
+         * <p>
+         * If no special style is specified, you can use colorId as style long integer
+         *
+         * @param spanLine Line
+         * @param column   Column
+         * @param style    Style of text
+         */
+        public void addIfNeeded(int spanLine, int column, long style) {
+            if (last != null && last.style == style) {
+                return;
+            }
+            add(spanLine, Span.obtain(column, style));
+        }
+
+        /**
+         * Add a span directly
+         * <p>
+         * Note: the line should always >= the line of span last committed
+         * <p>
+         * If two spans are on the same line, you must add them in order by their column
+         *
+         * @param spanLine The line position of span
+         * @param span     The span
+         */
+        public void add(int spanLine, Span span) {
+            int mapLine = spans.size() - 1;
+            if (spanLine == mapLine) {
+                spans.get(spanLine).add(span);
+            } else if (spanLine > mapLine) {
+                Span extendedSpan = last;
+                if (extendedSpan == null) {
+                    extendedSpan = Span.obtain(0, EditorColorScheme.TEXT_NORMAL);
+                }
+                while (mapLine < spanLine) {
+                    List<Span> lineSpans = new ArrayList<>();
+                    lineSpans.add(extendedSpan.copy().setColumn(0));
+                    spans.add(lineSpans);
+                    mapLine++;
+                }
+                List<Span> lineSpans = spans.get(spanLine);
+                if (span.column == 0) {
+                    lineSpans.clear();
+                }
+                lineSpans.add(span);
+            } else {
+                throw new IllegalStateException("Invalid position");
+            }
+            last = span;
+        }
+
+        /**
+         * This method must be called when whole text is analyzed.
+         * <strong>Note that it is not the line count but line index!</strong>
+         *
+         * @param line The line is the line last of text
+         */
+        public void determine(int line) {
+            int mapLine = spans.size() - 1;
+            var extendedSpan = last;
+            if (extendedSpan == null) {
+                extendedSpan = Span.obtain(0, EditorColorScheme.TEXT_NORMAL);
+            }
+            while (mapLine < line) {
+                List<Span> lineSpans = new ArrayList<>();
+                lineSpans.add(extendedSpan.copy().setColumn(0));
+                spans.add(lineSpans);
+                mapLine++;
+            }
+            determined = true;
+        }
+
+        /**
+         * Ensure the list not empty
+         */
+        public void addNormalIfNull() {
+            if (spans.isEmpty()) {
+                List<Span> spanList = new ArrayList<>();
+                spanList.add(Span.obtain(0, EditorColorScheme.TEXT_NORMAL));
+                spans.add(spanList);
+            }
+        }
+
+        /**
+         * Marks a region with the given flag.
+         * This can only be called after {@link Builder#determine(int)} is called.
+         */
+        public void markProblemRegion(int newFlag, int startLine, int startColumn, int endLine, int endColumn) {
+            if (!determined) {
+                throw new IllegalStateException("determine() has not been successfully called");
+            }
+            for (int line = startLine; line <= endLine; line++) {
+                int start = (line == startLine ? startColumn : 0);
+                int end = (line == endLine ? endColumn : Integer.MAX_VALUE);
+                List<Span> spans = this.spans.get(line);
+                int increment;
+                for (int i = 0; i < spans.size(); i += increment) {
+                    Span span = spans.get(i);
+                    increment = 1;
+                    if (span.column >= end) {
+                        break;
+                    }
+                    int spanEnd = (i + 1 >= spans.size() ? Integer.MAX_VALUE : spans.get(i + 1).column);
+                    if (spanEnd >= start) {
+                        int regionStartInSpan = Math.max(span.column, start);
+                        int regionEndInSpan = Math.min(end, spanEnd);
+                        if (regionStartInSpan == span.column) {
+                            if (regionEndInSpan != spanEnd) {
+                                increment = 2;
+                                Span nSpan = span.copy();
+                                nSpan.column = regionEndInSpan;
+                                spans.add(i + 1, nSpan);
+                            }
+                            span.problemFlags |= newFlag;
+                        } else {
+                            //regionStartInSpan > span.column
+                            if (regionEndInSpan == spanEnd) {
+                                increment = 2;
+                                Span nSpan = span.copy();
+                                nSpan.column = regionStartInSpan;
+                                spans.add(i + 1, nSpan);
+                                nSpan.problemFlags |= newFlag;
+                            } else {
+                                increment = 3;
+                                Span span1 = span.copy();
+                                span1.column = regionStartInSpan;
+                                span1.problemFlags |= newFlag;
+                                Span span2 = span.copy();
+                                span2.column = regionEndInSpan;
+                                spans.add(i + 1, span1);
+                                spans.add(i + 2, span2);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        public MappedSpans build() {
+            return new MappedSpans(spans);
+        }
+    }
+
+    private class Mdf implements Reader, Modifier {
+
+        private List<Span> span;
+
+        private void checkLine() {
+            if (span == null) {
+                throw new IllegalStateException("line must be set first");
+            }
+        }
+
+        @Override
+        public void moveToLine(int line) {
+            if (line == -1) {
+                span = null;
+                return;
+            }
+            span = spanMap.get(line);
+        }
+
+        @Override
+        public int getSpanCount() {
+            checkLine();
+            return span.size();
+        }
+
+        @Override
+        public Span getSpanAt(int index) {
+            checkLine();
+            return span.get(index);
+        }
+
+        @Override
+        public List<Span> getSpansOnLine(int line) {
+            return Collections.unmodifiableList(spanMap.get(line));
+        }
+
+        @Override
+        public void setSpansOnLine(int line, List<Span> spans) {
+            var last = spanMap.get(spanMap.size() - 1);
+            var extend = last.get(last.size() - 1);
+            while (spanMap.size() <= line) {
+                var list = new ArrayList<Span>();
+                list.add(extend.copy().setColumn(0));
+                spanMap.add(list);
+            }
+            spanMap.set(line, spans);
+        }
+        
+        @Override
+        public void addLineAt(int line, List<Span> spans) {
+            spanMap.add(line, spans);
+        }
+        
+        @Override
+        public void deleteLineAt(int line) {
+            spanMap.remove(line);
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Span.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Span.java
new file mode 100644
index 000000000..2576682af
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Span.java
@@ -0,0 +1,215 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import androidx.annotation.NonNull;
+
+import java.util.Collection;
+import java.util.Objects;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
+
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * The span model
+ *
+ * @author Rosemoe
+ */
+public class Span {
+
+    /**
+     * Flag for {@link Span#problemFlags}.
+     *
+     * Indicates this span is in ERROR region
+     */
+    public static final int FLAG_ERROR = 1 << 3;
+    /**
+     * Flag for {@link Span#problemFlags}.
+     *
+     * Indicates this span is in WARNING region
+     */
+    public static final int FLAG_WARNING = 1 << 2;
+    /**
+     * Flag for {@link Span#problemFlags}.
+     *
+     * Indicates this span is in TYPO region
+     */
+    public static final int FLAG_TYPO = 1 << 1;
+    /**
+     * Flag for {@link Span#problemFlags}.
+     *
+     * Indicates this span is in DEPRECATED region
+     */
+    public static final int FLAG_DEPRECATED = 1;
+
+
+    private static final BlockingQueue<Span> cacheQueue = new ArrayBlockingQueue<>(8192 * 2);
+    public int column;
+    /**
+     * @see TextStyle
+     */
+    public long style;
+    public int underlineColor;
+
+    /**
+     * Set this value to draw curly lines for this span to indicate code problems.
+     *
+     * @see Span#FLAG_ERROR
+     * @see Span#FLAG_WARNING
+     * @see Span#FLAG_TYPO
+     * @see Span#FLAG_DEPRECATED
+     * @see MappedSpans.Builder#markProblemRegion(int, int, int, int, int) 
+     */
+    public int problemFlags = 0;
+    public ExternalRenderer renderer = null;
+
+    /**
+     * Create a new span
+     *
+     * @param column  Start column of span
+     * @param style Style made from {@link TextStyle}
+     * @see Span#obtain(int, long)
+     * @see TextStyle
+     */
+    private Span(int column, long style) {
+        this.column = column;
+        this.style = style;
+    }
+
+    /**
+     * Get an available Span object from either cache or new instance.
+     * The result object will be initialized with the given arguments.
+     */
+    public static Span obtain(int column, long style) {
+        Span span = cacheQueue.poll();
+        if (span == null) {
+            return new Span(column, style);
+        } else {
+            span.column = column;
+            span.style = style;
+            return span;
+        }
+    }
+
+    public static void recycleAll(Collection<Span> spans) {
+        for (Span span : spans) {
+            if (!span.recycle()) {
+                return;
+            }
+        }
+    }
+
+    /**
+     * Set a underline for this region
+     * Zero for no underline
+     *
+     * @param color Color for this underline (not color id of {@link EditorColorScheme})
+     */
+    public void setUnderlineColor(int color) {
+        underlineColor = color;
+    }
+
+    /**
+     * Get span start column
+     *
+     * @return Start column
+     */
+    public int getColumn() {
+        return column;
+    }
+
+    /**
+     * Set column of this span
+     */
+    public Span setColumn(int column) {
+        this.column = column;
+        return this;
+    }
+
+    /**
+     * Make a copy of this span
+     */
+    public Span copy() {
+        Span copy = obtain(column, style);
+        copy.setUnderlineColor(underlineColor);
+        copy.problemFlags = problemFlags;
+        copy.renderer = renderer;
+        return copy;
+    }
+
+    /**
+     * Recycle the object
+     * @return Is successful?
+     */
+    public boolean recycle() {
+        problemFlags = column = underlineColor = 0;
+        style = 0;
+        renderer = null;
+        return cacheQueue.offer(this);
+    }
+
+    public int getForegroundColorId() {
+        return TextStyle.getForegroundColorId(style);
+    }
+
+    public int getBackgroundColorId() {
+        return TextStyle.getBackgroundColorId(style);
+    }
+
+    public long getStyleBits() {
+        return TextStyle.getStyleBits(style);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Span span = (Span) o;
+        return column == span.column && style == span.style && underlineColor == span.underlineColor && problemFlags == span.problemFlags && Objects.equals(renderer, span.renderer);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 31 * column;
+        hash = 31 * hash + Long.hashCode(style);
+        hash = 31 * hash + underlineColor;
+        hash = 31 * hash + problemFlags;
+        hash = 31 * hash + (renderer == null ? 0 : renderer.hashCode());
+        return hash;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        return "Span{" +
+                "column=" + column +
+                ", style=" + style +
+                ", underlineColor=" + underlineColor +
+                ", problemFlags=" + problemFlags +
+                ", renderer=" + renderer +
+                "}";
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Spans.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Spans.java
new file mode 100644
index 000000000..8a8ec34a9
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Spans.java
@@ -0,0 +1,91 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import java.util.List;
+
+import io.github.rosemoe.sora.text.CharPosition;
+
+/**
+ * Spans object save spans in editor.
+ */
+public interface Spans {
+
+    /**
+     * Adjust spans on insert.
+     * Must be implemented.
+     */
+    void adjustOnInsert(CharPosition start, CharPosition end);
+
+    /**
+     * Adjust spans on delete.
+     * Must be implemented.
+     */
+    void adjustOnDelete(CharPosition start, CharPosition end);
+
+    /**
+     * Read spans.
+     * Must be implemented.
+     */
+    Reader read();
+
+    /**
+     * Check whether the class supports {@link #modify()}
+     */
+    boolean supportsModify();
+
+    /**
+     * Modify the content.
+     *
+     * Optional to implement.
+     */
+    Modifier modify();
+
+    interface Reader {
+
+        /**
+         * Start reading the spans on the given line.
+         * line may be -1 to release the reader.
+         */
+        void moveToLine(int line);
+
+        int getSpanCount();
+
+        Span getSpanAt(int index);
+
+        List<Span> getSpansOnLine(int line);
+
+    }
+
+    interface Modifier {
+
+        void setSpansOnLine(int line, List<Span> spans);
+
+        void addLineAt(int line, List<Span> spans);
+
+        void deleteLineAt(int line);
+
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Styles.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Styles.java
new file mode 100644
index 000000000..a5ae50185
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/Styles.java
@@ -0,0 +1,155 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import io.github.rosemoe.sora.data.ObjectAllocator;
+import io.github.rosemoe.sora.text.CharPosition;
+
+/**
+ * This class stores styles of text and other decorations in editor related to code.
+ * <p>
+ * Note that this does not save any information related to languages. No extra space is provided
+ * for communication between analyzers and auto-completion. You should manage it by yourself.
+ */
+public class Styles {
+
+    public Spans spans;
+
+    public List<CodeBlock> blocks;
+
+    public int suppressSwitch = Integer.MAX_VALUE;
+
+    public Styles() {
+        this(null);
+    }
+
+    public Styles(Spans spans) {
+        this(spans, true);
+    }
+
+    public Styles(Spans spans, boolean initCodeBlocks) {
+        this.spans = spans;
+        if (initCodeBlocks) {
+            blocks = new ArrayList<>(128);
+        }
+    }
+
+    /**
+     * Get analyzed spans
+     */
+    public Spans getSpans() {
+        return spans;
+    }
+
+    /**
+     * Get a new BlockLine object
+     *
+     * @return An idle BlockLine
+     */
+    public CodeBlock obtainNewBlock() {
+        return ObjectAllocator.obtainBlockLine();
+    }
+
+    /**
+     * Add a new code block info
+     *
+     * @param block Info of code block
+     */
+    public void addCodeBlock(CodeBlock block) {
+        blocks.add(block);
+    }
+
+    /**
+     * Returns suppress switch
+     *
+     * @return suppress switch
+     * @see Styles#setSuppressSwitch(int)
+     */
+    public int getSuppressSwitch() {
+        return suppressSwitch;
+    }
+
+    /**
+     * Set suppress switch for editor
+     * What is 'suppress switch' ?:
+     * <p>
+     * Suppress switch is a switch size for code block line drawing
+     * and for the process to find out which code block the cursor is in.
+     * Because the code blocks are not saved by the order of both start line and
+     * end line,we are unable to know exactly when we should stop the process.
+     * So without a suppressing switch,it will cost a large of time to search code
+     * blocks.
+     * <p>
+     * A suppressing switch is the code block count in the first layer code block
+     * (as well as its sub code blocks).
+     * If you are unsure,do not set it.
+     * <p>
+     * The default value is Integer.MAX_VALUE
+     */
+    public void setSuppressSwitch(int suppressSwitch) {
+        this.suppressSwitch = suppressSwitch;
+    }
+
+    /**
+     * Adjust styles on insert.
+     */
+    public void adjustOnInsert(CharPosition start, CharPosition end) {
+        spans.adjustOnInsert(start, end);
+        if (blocks != null)
+            BlocksUpdater.update(blocks, start.line, end.line - start.line);
+    }
+
+    /**
+     * Adjust styles on delete.
+     */
+    public void adjustOnDelete(CharPosition start, CharPosition end) {
+        spans.adjustOnDelete(start, end);
+        if (blocks != null)
+            BlocksUpdater.update(blocks, start.line, start.line - end.line);
+    }
+
+    /**
+     * Do some extra work before finally send the result to editor.
+     */
+    public void finishBuilding() {
+        int pre = -1;
+        var sort = false;
+        for (int i = 0; i < blocks.size() - 1; i++) {
+            var cur = blocks.get(i + 1).endLine;
+            if (pre > cur) {
+                sort = true;
+                break;
+            }
+            pre = cur;
+        }
+        if (sort) {
+            Collections.sort(blocks, CodeBlock.COMPARATOR_END);
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/lang/styling/TextStyle.java b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/TextStyle.java
new file mode 100644
index 000000000..c7b755bcf
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/lang/styling/TextStyle.java
@@ -0,0 +1,142 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.lang.styling;
+
+/**
+ * Utility class for text style related operations
+ *
+ * @author Rosemoe
+ */
+public class TextStyle {
+
+    /**
+     * Convenient method
+     * @see #makeStyle(int, int, boolean, boolean, boolean, boolean)
+     */
+    public static long makeStyle(int foregroundColorId) {
+        checkColorId(foregroundColorId);
+        return foregroundColorId;
+    }
+
+    /**
+     * Convenient method
+     * @see #makeStyle(int, int, boolean, boolean, boolean, boolean)
+     */
+    public static long makeStyle(int foregroundColorId, boolean noCompletion) {
+        checkColorId(foregroundColorId);
+        return ((long)foregroundColorId) | NO_COMPLETION_BIT;
+    }
+
+    /**
+     * Convenient method
+     * @see #makeStyle(int, int, boolean, boolean, boolean, boolean)
+     */
+    public static long makeStyle(int foregroundColorId, int backgroundColorId, boolean bold,
+                                 boolean italic, boolean strikeThrough) {
+        return makeStyle(foregroundColorId, backgroundColorId, bold, italic, strikeThrough, false);
+    }
+
+    /**
+     * Make a TextStyle with the given style arguments
+     *
+     * Note: colorId must be less than 20 bits
+     * @see #BOLD_BIT
+     * @see #ITALICS_BIT
+     * @see #STRIKETHROUGH_BIT
+     * @see #NO_COMPLETION_BIT
+     */
+    public static long makeStyle(int foregroundColorId, int backgroundColorId, boolean bold,
+                                 boolean italic, boolean strikeThrough, boolean noCompletion) {
+        checkColorId(foregroundColorId);
+        checkColorId(backgroundColorId);
+        return ((long)foregroundColorId) +
+                (((long) backgroundColorId) << COLOR_ID_BIT_COUNT)
+                | (bold ? BOLD_BIT : 0)
+                | (italic ? ITALICS_BIT : 0)
+                | (strikeThrough ? STRIKETHROUGH_BIT : 0)
+                | (noCompletion ? NO_COMPLETION_BIT : 0);
+    }
+
+    public static int getForegroundColorId(long style) {
+        return (int) (style & FOREGROUND_BITS);
+    }
+
+    public static int getBackgroundColorId(long style) {
+        return (int) ((style & BACKGROUND_BITS) >> COLOR_ID_BIT_COUNT);
+    }
+
+    public static boolean isBold(long style) {
+        return (style & BOLD_BIT) != 0;
+    }
+
+    public static boolean isItalics(long style) {
+        return (style & ITALICS_BIT) != 0;
+    }
+
+    public static boolean isStrikeThrough(long style) {
+        return (style & STRIKETHROUGH_BIT) != 0;
+    }
+
+    public static boolean isNoCompletion(long style) {
+        return (style & NO_COMPLETION_BIT) != 0;
+    }
+
+    public static long getStyleBits(long style) {
+        return style & (BOLD_BIT + ITALICS_BIT + STRIKETHROUGH_BIT);
+    }
+
+    public final static int COLOR_ID_BIT_COUNT = 19;
+
+    public final static long FOREGROUND_BITS = ((1 << (COLOR_ID_BIT_COUNT)) - 1);
+
+    public final static long BACKGROUND_BITS =  FOREGROUND_BITS << COLOR_ID_BIT_COUNT;
+
+    /**
+     * Bold text style
+     */
+    public final static long BOLD_BIT = 1L << (COLOR_ID_BIT_COUNT * 2);
+
+    /**
+     * Italic text style
+     */
+    public final static long ITALICS_BIT = BOLD_BIT << 1;
+
+    /**
+     * Show a strikethrough
+     */
+    public final static long STRIKETHROUGH_BIT = ITALICS_BIT << 1;
+
+    /**
+     * Edit texts in the region will not cause auto-completion to work
+     */
+    public final static long NO_COMPLETION_BIT = STRIKETHROUGH_BIT << 1;
+
+    public static void checkColorId(int colorId) {
+        if (colorId > (1 << COLOR_ID_BIT_COUNT) - 1 || colorId < 0) {
+            throw new IllegalArgumentException("color id must be positive and bit count is less than " + COLOR_ID_BIT_COUNT);
+        }
+    }
+
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/CachedIndexer.java b/editor/src/main/java/io/github/rosemoe/sora/text/CachedIndexer.java
old mode 100755
new mode 100644
similarity index 77%
rename from app/src/main/java/io/github/rosemoe/editor/text/CachedIndexer.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/CachedIndexer.java
index a880db5d7..9cef106a9
--- a/app/src/main/java/io/github/rosemoe/editor/text/CachedIndexer.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/CachedIndexer.java
@@ -1,19 +1,29 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
+
+import androidx.annotation.NonNull;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -145,9 +155,8 @@ public class CachedIndexer implements Indexer, ContentListener {
      *
      * @param start Given position
      * @param index Querying index
-     * @return The querying position
      */
-    private CharPosition findIndexForward(CharPosition start, int index) {
+    private void findIndexForward(@NonNull CharPosition start, int index, @NonNull CharPosition dest) {
         if (start.index > index) {
             throw new IllegalArgumentException("Unable to find backward from method findIndexForward()");
         }
@@ -168,11 +177,9 @@ public class CachedIndexer implements Indexer, ContentListener {
         if (workIndex > index) {
             workColumn -= workIndex - index;
         }
-        CharPosition pos = new CharPosition();
-        pos.column = workColumn;
-        pos.line = workLine;
-        pos.index = index;
-        return pos;
+        dest.column = workColumn;
+        dest.line = workLine;
+        dest.index = index;
     }
 
     /**
@@ -180,9 +187,8 @@ public class CachedIndexer implements Indexer, ContentListener {
      *
      * @param start Given position
      * @param index Querying index
-     * @return The querying position
      */
-    private CharPosition findIndexBackward(CharPosition start, int index) {
+    private void findIndexBackward(CharPosition start, int index, CharPosition dest) {
         if (start.index < index) {
             throw new IllegalArgumentException("Unable to find forward from method findIndexBackward()");
         }
@@ -196,7 +202,8 @@ public class CachedIndexer implements Indexer, ContentListener {
                 workColumn = mContent.getColumnCount(workLine);
             } else {
                 //Reached the start of text,we have to use findIndexForward() as this method can not handle it
-                return findIndexForward(mZeroPoint, index);
+                findIndexForward(mZeroPoint, index, dest);
+                return;
             }
         }
         int dColumn = index - workIndex;
@@ -204,11 +211,9 @@ public class CachedIndexer implements Indexer, ContentListener {
             workLine++;
             workColumn = dColumn - 1;
         }
-        CharPosition pos = new CharPosition();
-        pos.column = workColumn;
-        pos.line = workLine;
-        pos.index = index;
-        return pos;
+        dest.column = workColumn;
+        dest.line = workLine;
+        dest.index = index;
     }
 
     /**
@@ -217,27 +222,25 @@ public class CachedIndexer implements Indexer, ContentListener {
      * @param start  Given position
      * @param line   Querying line
      * @param column Querying column
-     * @return The querying position
      */
-    private CharPosition findLiCoForward(CharPosition start, int line, int column) {
+    private void findLiCoForward(CharPosition start, int line, int column, CharPosition dest) {
         if (start.line > line) {
             throw new IllegalArgumentException("can not find backward from findLiCoForward()");
         }
         int workLine = start.line;
         int workIndex = start.index;
         {
-            //Make index to to left of line
+            //Make index to left of line
             workIndex = workIndex - start.column;
         }
         while (workLine < line) {
             workIndex += mContent.getColumnCount(workLine) + 1;
             workLine++;
         }
-        CharPosition pos = new CharPosition();
-        pos.column = 0;
-        pos.line = workLine;
-        pos.index = workIndex;
-        return findInLine(pos, line, column);
+        dest.column = 0;
+        dest.line = workLine;
+        dest.index = workIndex;
+        findInLine(dest, line, column);
     }
 
     /**
@@ -246,9 +249,8 @@ public class CachedIndexer implements Indexer, ContentListener {
      * @param start  Given position
      * @param line   Querying line
      * @param column Querying column
-     * @return The querying position
      */
-    private CharPosition findLiCoBackward(CharPosition start, int line, int column) {
+    private void findLiCoBackward(CharPosition start, int line, int column, CharPosition dest) {
         if (start.line < line) {
             throw new IllegalArgumentException("can not find forward from findLiCoBackward()");
         }
@@ -262,11 +264,10 @@ public class CachedIndexer implements Indexer, ContentListener {
             workIndex -= mContent.getColumnCount(workLine - 1) + 1;
             workLine--;
         }
-        CharPosition pos = new CharPosition();
-        pos.column = 0;
-        pos.line = workLine;
-        pos.index = workIndex;
-        return findInLine(pos, line, column);
+        dest.column = 0;
+        dest.line = workLine;
+        dest.index = workIndex;
+        findInLine(dest, line, column);
     }
 
     /**
@@ -275,18 +276,14 @@ public class CachedIndexer implements Indexer, ContentListener {
      * @param pos    Given position
      * @param line   Querying line
      * @param column Querying column
-     * @return The querying position
      */
-    private CharPosition findInLine(CharPosition pos, int line, int column) {
+    private void findInLine(CharPosition pos, int line, int column) {
         if (pos.line != line) {
             throw new IllegalArgumentException("can not find other lines with findInLine()");
         }
-        int index = pos.index - pos.column + column;
-        CharPosition pos2 = new CharPosition();
-        pos2.column = column;
-        pos2.line = line;
-        pos2.index = index;
-        return pos2;
+        pos.index = pos.index - pos.column + column;
+        pos.line = line;
+        pos.column = column;
     }
 
     /**
@@ -342,8 +339,7 @@ public class CachedIndexer implements Indexer, ContentListener {
 
     @Override
     public int getCharIndex(int line, int column) {
-        CharPosition pos = getCharPosition(line, column);
-        return pos == null ? 0 : pos.index;
+        return getCharPosition(line, column).index;
     }
 
     @Override
@@ -356,46 +352,58 @@ public class CachedIndexer implements Indexer, ContentListener {
         return getCharPosition(index).column;
     }
 
+    @NonNull
     @Override
     public CharPosition getCharPosition(int index) {
-        throwIfHas();
-        mContent.checkIndex(index);
-        CharPosition pos = findNearestByIndex(index);
-        CharPosition res;
-        if (pos.index == index) {
-            return pos;
-        } else if (pos.index < index) {
-            res = findIndexForward(pos, index);
-        } else {
-            res = findIndexBackward(pos, index);
-        }
-        if (Math.abs(index - pos.index) >= mSwitchIndex) {
-            push(res);
-        }
-        return res;
+        var pos = new CharPosition();
+        getCharPosition(index, pos);
+        return pos;
     }
 
     @Override
-    public CharPosition getCharPosition(int line, int column) {
+    public void getCharPosition(int index, @NonNull CharPosition dest) {
         throwIfHas();
-        if(!mContent.checkLineAndColumn(line, column, true))
-            return new CharPosition().zero();
-        CharPosition pos = findNearestByLine(line);
-        CharPosition res;
-        if (pos.line == line) {
-            if (pos.column == column) {
-                return pos;
-            }
-            return findInLine(pos, line, column);
-        } else if (pos.line < line) {
-            res = findLiCoForward(pos, line, column);
+        mContent.checkIndex(index);
+        CharPosition pos = findNearestByIndex(index);
+        if (pos.index == index) {
+            dest.set(pos);
+        } else if (pos.index < index) {
+            findIndexForward(pos, index, dest);
         } else {
-            res = findLiCoBackward(pos, line, column);
+            findIndexBackward(pos, index, dest);
+        }
+        if (Math.abs(index - pos.index) >= mSwitchIndex) {
+            push(dest.fromThis());
+        }
+    }
+
+    @NonNull
+    @Override
+    public CharPosition getCharPosition(int line, int column) {
+        var pos = new CharPosition();
+        getCharPosition(line, column, pos);
+        return pos;
+    }
+
+    @Override
+    public void getCharPosition(int line, int column, @NonNull CharPosition dest) {
+        throwIfHas();
+        mContent.checkLineAndColumn(line, column, true);
+        CharPosition pos = findNearestByLine(line);
+        if (pos.line == line) {
+            dest.set(pos);
+            if (pos.column == column) {
+                return;
+            }
+            findInLine(dest, line, column);
+        } else if (pos.line < line) {
+            findLiCoForward(pos, line, column, dest);
+        } else {
+            findLiCoBackward(pos, line, column, dest);
         }
         if (Math.abs(pos.line - line) > mSwitchLine) {
-            push(res);
+            push(dest.fromThis());
         }
-        return res;
     }
 
     @Override
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/CharPosition.java b/editor/src/main/java/io/github/rosemoe/sora/text/CharPosition.java
old mode 100755
new mode 100644
similarity index 53%
rename from app/src/main/java/io/github/rosemoe/editor/text/CharPosition.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/CharPosition.java
index 75fbb2505..13f6c4f44
--- a/app/src/main/java/io/github/rosemoe/editor/text/CharPosition.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/CharPosition.java
@@ -1,45 +1,45 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
 
 
-import io.github.rosemoe.editor.util.IntPair;
+import androidx.annotation.NonNull;
+
+import io.github.rosemoe.sora.util.IntPair;
 
 /**
  * This a data class of a character position in {@link Content}
  *
- * @author Rose
+ * @author Rosemoe
  */
 public final class CharPosition {
 
-    //Packaged due to make changes
-
     public int index;
 
     public int line;
 
     public int column;
-	
-	public CharPosition() {}
-	
-	public CharPosition(int line, int column) {
-		this.line = line;
-		this.column = column;
-		this.index = -1;
-	}
 
     /**
      * Get the index
@@ -104,14 +104,23 @@ public final class CharPosition {
      *
      * @return New CharPosition including info of this CharPosition
      */
+    @NonNull
     public CharPosition fromThis() {
-        CharPosition pos = new CharPosition();
-        pos.index = index;
-        pos.line = line;
-        pos.column = column;
+        var pos = new CharPosition();
+        pos.set(this);
         return pos;
     }
 
+    /**
+     * Set this {@link CharPosition} object's data the same as {@code another}
+     */
+    public void set(@NonNull CharPosition another) {
+        index = another.index;
+        line = another.line;
+        column = another.column;
+    }
+
+    @NonNull
     @Override
     public String toString() {
         return "CharPosition(line = " + line + ",column = " + column + ",index = " + index + ")";
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/CharSequenceIterator.java b/editor/src/main/java/io/github/rosemoe/sora/text/CharSequenceIterator.java
new file mode 100644
index 000000000..c793bcc28
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/CharSequenceIterator.java
@@ -0,0 +1,108 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import androidx.annotation.NonNull;
+
+import java.text.CharacterIterator;
+
+/**
+ * CharacterIterator implementation
+ *
+ * @author Rosemoe
+ */
+public class CharSequenceIterator implements CharacterIterator {
+
+    private final CharSequence s;
+    private int index;
+
+    public CharSequenceIterator(CharSequence source) {
+        s = source;
+    }
+
+    @Override
+    public char first() {
+        index = 0;
+        return current();
+    }
+
+    @Override
+    public char last() {
+        index = s.length() - 1;
+        if (index < 0) {
+            index = 0;
+        }
+        return current();
+    }
+
+    @Override
+    public char current() {
+        return index == getEndIndex() ? CharacterIterator.DONE : s.charAt(index);
+    }
+
+    @Override
+    public char next() {
+        index++;
+        return current();
+    }
+
+    @Override
+    public char previous() {
+        index --;
+        if (index < 0) {
+            index = 0;
+        }
+        return current();
+    }
+
+    @Override
+    public char setIndex(int i) {
+        index = i;
+        return current();
+    }
+
+    @Override
+    public int getBeginIndex() {
+        return 0;
+    }
+
+    @Override
+    public int getEndIndex() {
+        return s.length();
+    }
+
+    @Override
+    public int getIndex() {
+        return index;
+    }
+
+    @NonNull
+    @Override
+    public Object clone() {
+        var another = new CharSequenceIterator(s);
+        another.index = index;
+        return another;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/Content.java b/editor/src/main/java/io/github/rosemoe/sora/text/Content.java
new file mode 100644
index 000000000..7bb3d5564
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/Content.java
@@ -0,0 +1,874 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import androidx.annotation.NonNull;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+/**
+ * This class saves the text content for editor and maintains line widths
+ *
+ * @author Rose
+ */
+public class Content implements CharSequence {
+
+    public final static int DEFAULT_MAX_UNDO_STACK_SIZE = 500;
+    public final static int DEFAULT_LIST_CAPACITY = 1000;
+
+    private static int sInitialListCapacity;
+
+    static {
+        setInitialLineCapacity(DEFAULT_LIST_CAPACITY);
+    }
+
+    private final List<ContentLine> lines;
+    private int textLength;
+    private int nestedBatchEdit;
+    private final List<ContentListener> contentListeners;
+    private Indexer indexer;
+    private final UndoManager undoManager;
+    private Cursor cursor;
+    private LineRemoveListener lineListener;
+    private final ReadWriteLock lock;
+
+    /**
+     * This constructor will create a Content object with no text
+     */
+    public Content() {
+        this(null);
+    }
+
+    /**
+     * This constructor will create a Content object with the given source
+     * If you give us null,it will just create a empty Content object
+     *
+     * @param src The source of Content
+     */
+    public Content(CharSequence src) {
+        if (src == null) {
+            src = "";
+        }
+        lock = new ReentrantReadWriteLock();
+        textLength = 0;
+        nestedBatchEdit = 0;
+        lines = new ArrayList<>(getInitialLineCapacity());
+        lines.add(new ContentLine());
+        contentListeners = new ArrayList<>();
+        undoManager = new UndoManager();
+        setMaxUndoStackSize(Content.DEFAULT_MAX_UNDO_STACK_SIZE);
+        indexer = new CachedIndexer(this);
+        if (src.length() == 0) {
+            setUndoEnabled(true);
+            return;
+        }
+        setUndoEnabled(false);
+        insert(0, 0, src);
+        setUndoEnabled(true);
+    }
+
+    private void lock(boolean write) {
+        (write ? lock.writeLock() : lock.readLock()).lock();
+    }
+
+    private void unlock(boolean write) {
+        (write ? lock.writeLock() : lock.readLock()).unlock();
+    }
+
+    /**
+     * Returns the default capacity of text line list
+     *
+     * @return Default capacity
+     */
+    public static int getInitialLineCapacity() {
+        return Content.sInitialListCapacity;
+    }
+
+    /**
+     * Set the default capacity of text line list
+     *
+     * @param capacity Default capacity
+     */
+    public static void setInitialLineCapacity(int capacity) {
+        if (capacity <= 0) {
+            throw new IllegalArgumentException("capacity can not be negative or zero");
+        }
+        sInitialListCapacity = capacity;
+    }
+
+    /**
+     * Test whether the two ContentLine have the same content
+     *
+     * @param a ContentLine
+     * @param b another ContentLine
+     * @return Whether equals in content
+     */
+    private static boolean equals(ContentLine a, ContentLine b) {
+        if (a.length() != b.length()) {
+            return false;
+        }
+        for (int i = 0; i < a.length(); i++) {
+            if (a.charAt(i) != b.charAt(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public char charAt(int index) {
+        checkIndex(index);
+        lock(false);
+        try {
+            CharPosition p = getIndexer().getCharPosition(index);
+            return charAt(p.line, p.column);
+        } finally {
+            unlock(false);
+        }
+    }
+
+    @Override
+    public int length() {
+        return textLength;
+    }
+
+    @NonNull
+    @Override
+    public CharSequence subSequence(int start, int end) {
+        if (start > end) {
+            throw new StringIndexOutOfBoundsException("start > end");
+        }
+        lock(false);
+        try {
+            CharPosition s = getIndexer().getCharPosition(start);
+            CharPosition e = getIndexer().getCharPosition(end);
+            return subContentInternal(s.getLine(), s.getColumn(), e.getLine(), e.getColumn());
+        } finally {
+            unlock(false);
+        }
+    }
+
+    /**
+     * Set a line listener
+     *
+     * @param lis the listener,maybe null
+     * @see LineRemoveListener
+     */
+    public void setLineListener(LineRemoveListener lis) {
+        this.lineListener = lis;
+    }
+
+    /**
+     * Get the character at the given position
+     * If (column == getColumnCount(line)),it returns '\n'
+     * IndexOutOfBoundsException is thrown
+     *
+     * @param line   The line position of character
+     * @param column The column position of character
+     * @return The character at the given position
+     */
+    public char charAt(int line, int column) {
+        lock(false);
+        try {
+            checkLineAndColumn(line, column, true);
+            if (column == getColumnCount(line)) {
+                return '\n';
+            }
+            return lines.get(line).charAt(column);
+        } finally {
+            unlock(false);
+        }
+    }
+
+    /**
+     * Get raw data of line
+     * The result is not expected to be modified
+     *
+     * @param line Line
+     * @return Raw ContentLine used by Content
+     */
+    public ContentLine getLine(int line) {
+        lock(false);
+        try {
+            return lines.get(line);
+        } finally {
+            unlock(false);
+        }
+    }
+
+    /**
+     * Get how many lines there are
+     *
+     * @return Line count
+     */
+    public int getLineCount() {
+        return lines.size();
+    }
+
+    /**
+     * Get how many characters is on the given line
+     * If (line < 0 or line >= getLineCount()),it will throw a IndexOutOfBoundsException
+     *
+     * @param line The line to get
+     * @return Character count on line
+     */
+    public int getColumnCount(int line) {
+        return getLine(line).length();
+    }
+
+    /**
+     * Get the given line text without '\n' character
+     *
+     * @param line The line to get
+     * @return New String object of this line
+     */
+    public String getLineString(int line) {
+        lock(false);
+        try {
+            checkLine(line);
+            return lines.get(line).toString();
+        } finally {
+            unlock(false);
+        }
+    }
+
+    /**
+     * Get region of the given line
+     *
+     * @param dest   Destination of characters
+     * @param offset Offset in dest to store the chars
+     */
+    public void getRegionOnLine(int line, int start, int end, char[] dest, int offset) {
+        lock(false);
+        try {
+            lines.get(line).getChars(start, end, dest, offset);
+        } finally {
+            unlock(false);
+        }
+    }
+
+    /**
+     * Get characters of line
+     */
+    public void getLineChars(int line, char[] dest) {
+        getRegionOnLine(line, 0, getColumnCount(line), dest, 0);
+    }
+
+    /**
+     * Transform the (line,column) position to index
+     * This task will usually be completed by {@link Indexer}
+     *
+     * @param line   Line of index
+     * @param column Column on line of index
+     * @return Transformed index for the given arguments
+     */
+    public int getCharIndex(int line, int column) {
+        lock(false);
+        try {
+            return getIndexer().getCharIndex(line, column);
+        } finally {
+            unlock(false);
+        }
+    }
+
+    /**
+     * Insert content to this object
+     *
+     * @param line   The insertion's line position
+     * @param column The insertion's column position
+     * @param text   The text you want to insert at the position
+     */
+    public void insert(int line, int column, CharSequence text) {
+        lock(true);
+        try {
+            insertInternal(line, column, text);
+        } finally {
+            unlock(true);
+        }
+    }
+
+    private void insertInternal(int line, int column, CharSequence text) {
+        checkLineAndColumn(line, column, true);
+        if (text == null) {
+            throw new IllegalArgumentException("text can not be null");
+        }
+
+        //-----Notify------
+        if (cursor != null)
+            cursor.beforeInsert(line, column);
+        for (var lis : contentListeners) {
+            lis.beforeModification(this);
+        }
+
+        int workLine = line;
+        int workIndex = column;
+        if (workIndex == -1) {
+            workIndex = 0;
+        }
+        ContentLine currLine = lines.get(workLine);
+        for (int i = 0; i < text.length(); i++) {
+            char c = text.charAt(i);
+            if (c == '\n') {
+                ContentLine newLine = new ContentLine();
+                newLine.append(currLine, workIndex, currLine.length());
+                currLine.delete(workIndex, currLine.length());
+                lines.add(workLine + 1, newLine);
+                currLine = newLine;
+                workIndex = 0;
+                workLine++;
+            } else {
+                currLine.insert(workIndex, c);
+                workIndex++;
+            }
+        }
+        textLength += text.length();
+        this.dispatchAfterInsert(line, column, workLine, workIndex, text);
+    }
+
+    /**
+     * Delete character in [start,end)
+     *
+     * @param start Start position in content
+     * @param end   End position in content
+     */
+    public void delete(int start, int end) {
+        checkIndex(start);
+        checkIndex(end);
+        lock(true);
+        try {
+            CharPosition startPos = getIndexer().getCharPosition(start);
+            CharPosition endPos = getIndexer().getCharPosition(end);
+            if (start != end) {
+                deleteInternal(startPos.line, startPos.column, endPos.line, endPos.column);
+            }
+        } finally {
+            unlock(true);
+        }
+    }
+
+    /**
+     * Delete text in the given region
+     *
+     * @param startLine         The start line position
+     * @param columnOnStartLine The start column position
+     * @param endLine           The end line position
+     * @param columnOnEndLine   The end column position
+     */
+    public void delete(int startLine, int columnOnStartLine, int endLine, int columnOnEndLine) {
+        lock(true);
+        try {
+            deleteInternal(startLine, columnOnStartLine, endLine, columnOnEndLine);
+        } finally {
+            unlock(true);
+        }
+    }
+
+    private void deleteInternal(int startLine, int columnOnStartLine, int endLine, int columnOnEndLine) {
+        if (startLine == 0 && columnOnStartLine == -1) {
+            return;
+        }
+        StringBuilder changedContent = new StringBuilder();
+        if (startLine == endLine) {
+            checkLineAndColumn(endLine, columnOnEndLine, true);
+            checkLineAndColumn(startLine, columnOnStartLine == -1 ? 0 : columnOnStartLine, true);
+            int beginIdx = columnOnStartLine;
+            if (columnOnStartLine == -1) {
+                beginIdx = 0;
+            }
+            if (beginIdx > columnOnEndLine) {
+                throw new IllegalArgumentException("start > end");
+            }
+            ContentLine curr = lines.get(startLine);
+            int len = curr.length();
+            if (beginIdx < 0 || beginIdx > len || columnOnEndLine > len) {
+                throw new StringIndexOutOfBoundsException("column start or column end is out of bounds");
+            }
+
+            //-----Notify------
+            if (cursor != null) {
+                if (columnOnStartLine != -1) {
+                    cursor.beforeDelete(startLine, columnOnStartLine, endLine, columnOnEndLine);
+                } else {
+                    cursor.beforeDelete(startLine == 0 ? 0 : startLine - 1, startLine == 0 ? 0 : getColumnCount(startLine - 1), endLine, columnOnEndLine);
+                }
+            }
+            for (var lis : contentListeners) {
+                lis.beforeModification(this);
+            }
+
+            changedContent.append(curr, beginIdx, columnOnEndLine);
+            curr.delete(beginIdx, columnOnEndLine);
+            textLength -= columnOnEndLine - columnOnStartLine;
+            if (columnOnStartLine == -1) {
+                if (startLine == 0) {
+                    textLength++;
+                } else {
+                    ContentLine previous = lines.get(startLine - 1);
+                    columnOnStartLine = previous.length();
+                    previous.append(curr);
+                    ContentLine rm = lines.remove(startLine);
+                    if (lineListener != null) {
+                        lineListener.onRemove(this, rm);
+                    }
+                    changedContent.insert(0, '\n');
+                    startLine--;
+                }
+            }
+        } else if (startLine < endLine) {
+            checkLineAndColumn(startLine, columnOnStartLine, true);
+            checkLineAndColumn(endLine, columnOnEndLine, true);
+
+            //-----Notify------
+            if (cursor != null)
+                cursor.beforeDelete(startLine, columnOnStartLine, endLine, columnOnEndLine);
+            for (var lis : contentListeners) {
+                lis.beforeModification(this);
+            }
+
+            for (int i = 0; i < endLine - startLine - 1; i++) {
+                ContentLine line = lines.remove(startLine + 1);
+                if (lineListener != null) {
+                    lineListener.onRemove(this, line);
+                }
+                textLength -= line.length() + 1;
+                changedContent.append('\n').append(line);
+            }
+            int currEnd = startLine + 1;
+            ContentLine start = lines.get(startLine);
+            ContentLine end = lines.get(currEnd);
+            textLength -= start.length() - columnOnStartLine;
+            changedContent.insert(0, start, columnOnStartLine, start.length());
+            start.delete(columnOnStartLine, start.length());
+            textLength -= columnOnEndLine;
+            changedContent.append('\n').append(end, 0, columnOnEndLine);
+            end.delete(0, columnOnEndLine);
+            textLength--;
+            ContentLine r = lines.remove(currEnd);
+            if (lineListener != null) {
+                lineListener.onRemove(this, r);
+            }
+            start.append(end);
+        } else {
+            throw new IllegalArgumentException("start line > end line");
+        }
+        this.dispatchAfterDelete(startLine, columnOnStartLine, endLine, columnOnEndLine, changedContent);
+    }
+
+    /**
+     * Replace the text in the given region
+     * This action will be completed by calling {@link Content#delete(int, int, int, int)} and {@link Content#insert(int, int, CharSequence)}
+     *
+     * @param startLine         The start line position
+     * @param columnOnStartLine The start column position
+     * @param endLine           The end line position
+     * @param columnOnEndLine   The end column position
+     * @param text              The text to replace old text
+     */
+    public void replace(int startLine, int columnOnStartLine, int endLine, int columnOnEndLine, CharSequence text) {
+        if (text == null) {
+            throw new IllegalArgumentException("text can not be null");
+        }
+        lock(true);
+        try {
+            this.dispatchBeforeReplace();
+            deleteInternal(startLine, columnOnStartLine, endLine, columnOnEndLine);
+            insertInternal(startLine, columnOnStartLine, text);
+        } finally {
+            unlock(true);
+        }
+    }
+
+    /**
+     * Undo the last modification
+     * NOTE:When there are too much modification,old modification will be deleted from UndoManager
+     */
+    public void undo() {
+        undoManager.undo(this);
+    }
+
+    /**
+     * Redo the last modification
+     */
+    public void redo() {
+        undoManager.redo(this);
+    }
+
+    /**
+     * Check whether the {@link UndoManager} is working to undo/redo
+     */
+    public boolean isUndoOrRedo() {
+        return undoManager.isModifyingContent();
+    }
+
+    /**
+     * Whether we can undo
+     *
+     * @return Whether we can undo
+     */
+    public boolean canUndo() {
+        return undoManager.canUndo();
+    }
+
+    /**
+     * Whether we can redo
+     *
+     * @return Whether we can redo
+     */
+    public boolean canRedo() {
+        return undoManager.canRedo();
+    }
+
+    /**
+     * Get whether UndoManager is enabled
+     *
+     * @return Whether UndoManager is enabled
+     */
+    public boolean isUndoEnabled() {
+        return undoManager.isUndoEnabled();
+    }
+
+    /**
+     * Set whether enable the UndoManager.
+     * If false,any modification will not be taken down and previous modification that
+     * is already in UndoManager will be removed.Does not make changes to content.
+     *
+     * @param enabled New state for UndoManager
+     */
+    public void setUndoEnabled(boolean enabled) {
+        undoManager.setUndoEnabled(enabled);
+    }
+
+    /**
+     * Get current max stack size of UndoManager
+     *
+     * @return current max stack size
+     */
+    public int getMaxUndoStackSize() {
+        return undoManager.getMaxUndoStackSize();
+    }
+
+    /**
+     * Set the max size of stack in UndoManager
+     *
+     * @param maxSize New max size
+     */
+    public void setMaxUndoStackSize(int maxSize) {
+        undoManager.setMaxUndoStackSize(maxSize);
+    }
+
+    /**
+     * A delegate method.
+     * Notify the UndoManager to begin batch edit(enter a new layer).
+     * NOTE: batch edit in Android can be nested.
+     *
+     * @return Whether in batch edit
+     */
+    public boolean beginBatchEdit() {
+        nestedBatchEdit++;
+        return isInBatchEdit();
+    }
+
+    /**
+     * A delegate method.
+     * Notify the UndoManager to end batch edit(exit current layer).
+     *
+     * @return Whether in batch edit
+     */
+    public boolean endBatchEdit() {
+        nestedBatchEdit--;
+        if (nestedBatchEdit < 0) {
+            nestedBatchEdit = 0;
+        }
+        return isInBatchEdit();
+    }
+
+    /**
+     * Returns whether we are in batch edit
+     *
+     * @return Whether in batch edit
+     */
+    public boolean isInBatchEdit() {
+        return nestedBatchEdit > 0;
+    }
+
+    /**
+     * Add a new {@link ContentListener} to the Content
+     *
+     * @param listener The listener to add
+     */
+    public void addContentListener(ContentListener listener) {
+        if (listener == null) {
+            throw new IllegalArgumentException("listener can not be null");
+        }
+        if (listener instanceof Indexer) {
+            throw new IllegalArgumentException("Permission denied");
+        }
+        if (!contentListeners.contains(listener)) {
+            contentListeners.add(listener);
+        }
+    }
+
+    /**
+     * Remove the given listener of this Content
+     *
+     * @param listener The listener to remove
+     */
+    public void removeContentListener(ContentListener listener) {
+        if (listener instanceof Indexer) {
+            throw new IllegalArgumentException("Permission denied");
+        }
+        contentListeners.remove(listener);
+    }
+
+    /**
+     * Get the using {@link Indexer} object
+     *
+     * @return Indexer for this object
+     */
+    public Indexer getIndexer() {
+        if (indexer.getClass() != CachedIndexer.class && cursor != null) {
+            return cursor.getIndexer();
+        }
+        return indexer;
+    }
+
+    /**
+     * Quick method to get sub string of this object
+     *
+     * @param startLine   The start line position
+     * @param startColumn The start column position
+     * @param endLine     The end line position
+     * @param endColumn   The end column position
+     * @return sub-sequence of this Content
+     */
+    public Content subContent(int startLine, int startColumn, int endLine, int endColumn) {
+        lock(false);
+        try {
+            return subContentInternal(startLine, startColumn, endLine, endColumn);
+        } finally {
+            unlock(false);
+        }
+    }
+
+    private Content subContentInternal(int startLine, int startColumn, int endLine, int endColumn) {
+        Content c = new Content();
+        c.setUndoEnabled(false);
+        if (startLine == endLine) {
+            c.insert(0, 0, lines.get(startLine).subSequence(startColumn, endColumn));
+        } else if (startLine < endLine) {
+            c.insert(0, 0, lines.get(startLine).subSequence(startColumn, lines.get(startLine).length()));
+            for (int i = startLine + 1; i < endLine; i++) {
+                c.lines.add(new ContentLine(lines.get(i)));
+                c.textLength += lines.get(i).length() + 1;
+            }
+            ContentLine end = lines.get(endLine);
+            c.lines.add(new ContentLine().insert(0, end, 0, endColumn));
+            c.textLength += endColumn + 1;
+        } else {
+            throw new IllegalArgumentException("start > end");
+        }
+        c.setUndoEnabled(true);
+        return c;
+    }
+
+    @Override
+    public boolean equals(Object anotherObject) {
+        if (anotherObject instanceof Content) {
+            Content content = (Content) anotherObject;
+            if (content.getLineCount() != this.getLineCount()) {
+                return false;
+            }
+            for (int i = 0; i < this.getLineCount(); i++) {
+                if (!equals(lines.get(i), content.lines.get(i))) {
+                    return false;
+                }
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        return toStringBuilder().toString();
+    }
+
+    /**
+     * Get the text in StringBuilder form
+     * <p>
+     * This can improve the speed in char getting for tokenizing
+     *
+     * @return StringBuilder form of Content
+     */
+    public StringBuilder toStringBuilder() {
+        var sb = new StringBuilder();
+        appendToStringBuilder(sb);
+        return sb;
+    }
+
+    /**
+     * Append the content to the given {@link StringBuilder}
+     */
+    public void appendToStringBuilder(StringBuilder sb) {
+        sb.ensureCapacity(sb.length() + length());
+        boolean first = true;
+        final int lines = getLineCount();
+        for (int i = 0; i < lines; i++) {
+            ContentLine line = this.lines.get(i);
+            if (!first) {
+                sb.append('\n');
+            } else {
+                first = false;
+            }
+            line.appendTo(sb);
+        }
+    }
+
+    /**
+     * Get Cursor for editor (Create if there is not)
+     *
+     * @return Cursor
+     */
+    public Cursor getCursor() {
+        if (cursor == null) {
+            cursor = new Cursor(this);
+        }
+        return cursor;
+    }
+
+    /**
+     * Dispatch events to listener before replacement
+     */
+    private void dispatchBeforeReplace() {
+        undoManager.beforeReplace(this);
+        if (cursor != null)
+            cursor.beforeReplace();
+        if (indexer instanceof ContentListener) {
+            ((ContentListener) indexer).beforeReplace(this);
+        }
+        for (ContentListener lis : contentListeners) {
+            lis.beforeReplace(this);
+        }
+    }
+
+    /**
+     * Dispatch events to listener after deletion
+     *
+     * @param a Start line
+     * @param b Start Column
+     * @param c End line
+     * @param d End column
+     * @param e Text deleted
+     */
+    private void dispatchAfterDelete(int a, int b, int c, int d, CharSequence e) {
+        undoManager.afterDelete(this, a, b, c, d, e);
+        if (cursor != null)
+            cursor.afterDelete(a, b, c, d, e);
+        if (indexer instanceof ContentListener) {
+            ((ContentListener) indexer).afterDelete(this, a, b, c, d, e);
+        }
+        for (ContentListener lis : contentListeners) {
+            lis.afterDelete(this, a, b, c, d, e);
+        }
+    }
+
+    /**
+     * Dispatch events to listener after insertion
+     *
+     * @param a Start line
+     * @param b Start Column
+     * @param c End line
+     * @param d End column
+     * @param e Text deleted
+     */
+    private void dispatchAfterInsert(int a, int b, int c, int d, CharSequence e) {
+        undoManager.afterInsert(this, a, b, c, d, e);
+        if (cursor != null)
+            cursor.afterInsert(a, b, c, d, e);
+        if (indexer instanceof ContentListener) {
+            ((ContentListener) indexer).afterInsert(this, a, b, c, d, e);
+        }
+        for (ContentListener lis : contentListeners) {
+            lis.afterInsert(this, a, b, c, d, e);
+        }
+    }
+
+    /**
+     * Check whether the index is valid
+     *
+     * @param index Index to check
+     */
+    protected void checkIndex(int index) {
+        if (index > length()) {
+            throw new StringIndexOutOfBoundsException("Index " + index + " out of bounds. length:" + length());
+        }
+    }
+
+    /**
+     * Check whether the line is valid
+     *
+     * @param line Line to check
+     */
+    protected void checkLine(int line) {
+        if (line >= getLineCount()) {
+            throw new StringIndexOutOfBoundsException("Line " + line + " out of bounds. line count:" + getLineCount());
+        }
+    }
+
+    /**
+     * Check whether the line and column is valid
+     *
+     * @param line       The line to check
+     * @param column     The column to check
+     * @param allowEqual Whether allow (column == getColumnCount(line))
+     */
+    protected void checkLineAndColumn(int line, int column, boolean allowEqual) {
+        checkLine(line);
+        int len = lines.get(line).length();
+        if (column > len || (!allowEqual && column == len)) {
+            throw new StringIndexOutOfBoundsException(
+                    "Column " + column + " out of bounds.line: " + line + " ,column count:" + len);
+        }
+    }
+
+    /**
+     * Copy text in this Content object.
+     * Returns a new Content object with the same text as this object.
+     */
+    public Content copyText() {
+        var n = new Content();
+        n.lines.remove(0);
+        for (int i = 0; i < getLineCount(); i++) {
+            var line = lines.get(i);
+            n.lines.add(line.subSequence(0, line.length()));
+        }
+        return n;
+    }
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/ContentLine.java b/editor/src/main/java/io/github/rosemoe/sora/text/ContentLine.java
old mode 100755
new mode 100644
similarity index 88%
rename from app/src/main/java/io/github/rosemoe/editor/text/ContentLine.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/ContentLine.java
index ff9a73ace..076375ffd
--- a/app/src/main/java/io/github/rosemoe/editor/text/ContentLine.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/ContentLine.java
@@ -1,26 +1,39 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
 
 import android.text.GetChars;
 import android.text.TextUtils;
 
+import androidx.annotation.NonNull;
+
+import io.github.rosemoe.sora.annotations.UnsupportedUserUsage;
+
 public class ContentLine implements CharSequence, GetChars {
 
-    private char[] value;
+    @UnsupportedUserUsage
+    public char[] value;
 
     private int length;
 
@@ -34,6 +47,13 @@ public class ContentLine implements CharSequence, GetChars {
      */
     private int width;
 
+    /**
+     * Width of each character inside
+     */
+    @UnsupportedUserUsage
+    public float[] widthCache;
+    public long timestamp;
+
     public ContentLine() {
         this(true);
     }
@@ -299,6 +319,7 @@ public class ContentLine implements CharSequence, GetChars {
     }
 
     @Override
+    @NonNull
     public ContentLine subSequence(int start, int end) {
         checkIndex(start);
         checkIndex(end);
@@ -321,10 +342,15 @@ public class ContentLine implements CharSequence, GetChars {
     }
 
     @Override
+    @NonNull
     public String toString() {
         return new String(value, 0, length);
     }
 
+    public char[] getRawData() {
+        return value;
+    }
+
     public void getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin) {
         if (srcBegin < 0)
             throw new StringIndexOutOfBoundsException(srcBegin);
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/ContentListener.java b/editor/src/main/java/io/github/rosemoe/sora/text/ContentListener.java
old mode 100755
new mode 100644
similarity index 57%
rename from app/src/main/java/io/github/rosemoe/editor/text/ContentListener.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/ContentListener.java
index 86ad0a135..104cf9e6f
--- a/app/src/main/java/io/github/rosemoe/editor/text/ContentListener.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/ContentListener.java
@@ -1,32 +1,42 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
+
+import io.github.rosemoe.sora.annotations.UnsupportedUserUsage;
 
 /**
  * This is the listener for content.
  * You will receive calls when the Content object is going to change or changed.
  *
- * @author Rose
+ * @author Rosemoe
  */
 public interface ContentListener {
 
     /**
      * This is to notify you that you will receive {@link ContentListener#afterDelete(Content, int, int, int, int, CharSequence)}
      * and {@link ContentListener#afterInsert(Content, int, int, int, int, CharSequence)} calls.
-     * These two calls are a action of replacement.
+     * These two calls are an action of replacement.
      * <strong> You are not expected to make changes to this Content object at this method. </strong>
      *
      * @param content The target Content object being replaced text
@@ -38,7 +48,7 @@ public interface ContentListener {
      *
      * @param content         The Content which has inserted the given text
      * @param startLine       The insertion position line
-     * @param startColumn     The insertion position column on line
+     * @param startColumn     The insertion position column on the line
      * @param endLine         The line position of the last character in inserted content
      * @param endColumn       The column position after the last character in inserted content
      * @param insertedContent The content inserted
@@ -57,4 +67,12 @@ public interface ContentListener {
      */
     void afterDelete(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent);
 
+    /**
+     * Internal API
+     */
+    @UnsupportedUserUsage
+    default void beforeModification(Content content) {
+        
+    }
+
 }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/ContentReference.java b/editor/src/main/java/io/github/rosemoe/sora/text/ContentReference.java
new file mode 100644
index 000000000..f48840a84
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/ContentReference.java
@@ -0,0 +1,174 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import androidx.annotation.NonNull;
+
+import java.io.IOException;
+import java.io.Reader;
+
+/**
+ * Reference of a content due to accessed in read-only mode.
+ * Access can be validated during accesses.
+ * {@link io.github.rosemoe.sora.text.TextReference.ValidateFailedException} may be thrown if the check is failed.
+ *
+ * @author Rosemoe
+ */
+public class ContentReference extends TextReference {
+
+    private final Content content;
+    private final Indexer indexer;
+    private final CharPosition cached;
+
+    public ContentReference(@NonNull Content ref) {
+        super(ref);
+        this.content = ref;
+        cached = new CharPosition();
+        // Use another Indexer to query characters by index, avoiding concurrent modification to cache list
+        this.indexer = new CachedIndexer(content);
+    }
+
+    @Override
+    public char charAt(int index) {
+        validateAccess();
+        indexer.getCharPosition(index, cached);
+        return content.charAt(cached.line, cached.column);
+    }
+
+    /**
+     * @see Content#getLineCount()
+     */
+    public int getLineCount() {
+        validateAccess();
+        return content.getLineCount();
+    }
+
+    /**
+     * @see Content#getColumnCount(int)
+     */
+    public int getColumnCount(int line) {
+        validateAccess();
+        return content.getColumnCount(line);
+    }
+
+    /**
+     * @see Content#getLineString(int)
+     */
+    public String getLine(int line) {
+        validateAccess();
+        return content.getLineString(line);
+    }
+
+    /**
+     * @see Content#getLineChars(int, char[])
+     */
+    public void getLineChars(int line, char[] dest) {
+        validateAccess();
+        content.getLineChars(line, dest);
+    }
+
+    /**
+     * @see Content#getLine(int)#appendLineTo(StringBuilder, int)
+     */
+    public void appendLineTo(StringBuilder sb, int line) {
+        validateAccess();
+        content.getLine(line).appendTo(sb);
+    }
+
+    /**
+     * Create a reader to read the text
+     */
+    public Reader createReader() {
+        return new RefReader();
+    }
+
+    @NonNull
+    @Override
+    public Content getReference() {
+        return (Content) super.getReference();
+    }
+
+    @Override
+    public ContentReference setValidator(Validator validator) {
+        super.setValidator(validator);
+        return this;
+    }
+
+    private class RefReader extends Reader {
+
+        private int markedLine, markedColumn;
+        private int line;
+        private int column;
+
+        @Override
+        public int read(char[] chars, int offset, int length) {
+            if (chars.length < offset + length) {
+                throw new IllegalArgumentException("size not enough");
+            }
+            int read = 0;
+            while (read < length && line < getLineCount()) {
+                var columnCount = getColumnCount(line);
+                int toRead = Math.min(columnCount - column, length - read);
+                if (toRead > 0) {
+                    content.getRegionOnLine(line, column, column + toRead, chars, offset + read);
+                }
+                column += toRead;
+                read += toRead;
+                if (read < length && columnCount == column) {
+                    chars[offset + read] = '\n';
+                    read ++;
+                    line++;
+                    column = 0;
+                }
+            }
+            if (read == 0) {
+                return -1;
+            }
+            return read;
+        }
+
+        @Override
+        public void close() {
+            line = Integer.MAX_VALUE;
+            column = Integer.MAX_VALUE;
+        }
+
+        @Override
+        public boolean markSupported() {
+            return true;
+        }
+
+        @Override
+        public void mark(int readAheadLimit) throws IOException {
+            markedLine = line;
+            markedColumn = column;
+        }
+
+        @Override
+        public void reset() throws IOException {
+            line = markedLine;
+            column = markedColumn;
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/Cursor.java b/editor/src/main/java/io/github/rosemoe/sora/text/Cursor.java
old mode 100755
new mode 100644
similarity index 57%
rename from app/src/main/java/io/github/rosemoe/editor/text/Cursor.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/Cursor.java
index 4c04c8a88..692a373a5
--- a/app/src/main/java/io/github/rosemoe/editor/text/Cursor.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/Cursor.java
@@ -1,69 +1,52 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
 
-import com.itsaky.androidide.app.StudioApp;
-import com.itsaky.androidide.utils.Logger;
-
-import io.github.rosemoe.editor.interfaces.EditorLanguage;
-import io.github.rosemoe.editor.util.IntPair;
-import io.github.rosemoe.editor.widget.CodeEditor;
-import java.util.ArrayList;
-import java.util.List;
+import io.github.rosemoe.sora.util.IntPair;
 
 /**
- * @author Rose
- * Warning:The cursor position will update automatically when the content has been changed by other way
+ * The cursor position will update automatically when the content has been changed by other ways.
+ *
+ * @author Rosemoe
  */
-public final class  Cursor {
+public final class Cursor {
 
     private final Content mContent;
     private final CachedIndexer mIndexer;
     private CharPosition mLeft, mRight;
     private CharPosition cache0, cache1, cache2;
-    private boolean mAutoIndentEnabled;
-    private EditorLanguage mLanguage;
-    private int mTabWidth;
-    
-    private final CodeEditor editor;
-    
-    private final List<Character> pairs;
-    
-    private static final Logger LOG = Logger.instance ("Cursor");
-    
+
     /**
      * Create a new Cursor for Content
      *
      * @param content Target content
      */
-    public Cursor(CodeEditor editor, Content content) {
-        this.editor = editor;
+    public Cursor(Content content) {
         mContent = content;
         mIndexer = new CachedIndexer(content);
         mLeft = new CharPosition().zero();
         mRight = new CharPosition().zero();
-        mTabWidth = 4;
-        
-        pairs = new ArrayList<>();
-        pairs.add('}');
-        pairs.add(')');
-        pairs.add(']');
-        pairs.add('"');
-        pairs.add('\'');
-        pairs.add('>');
     }
 
     /**
@@ -72,20 +55,10 @@ public final class  Cursor {
      * @param c Character to check
      * @return Result whether a space char
      */
-    protected static boolean isWhitespace(char c) {
+    private static boolean isWhitespace(char c) {
         return (c == '\t' || c == ' ');
     }
 
-    /**
-     * Whether the char is a emoji
-     *
-     * @param ch Character to check
-     * @return Whether the char is a emoji
-     */
-    private static boolean isEmoji(char ch) {
-        return ch == 0xd83c || ch == 0xd83d;
-    }
-
     /**
      * Make left and right cursor on the given position
      *
@@ -223,153 +196,6 @@ public final class  Cursor {
         return mLeft.index != mRight.index;
     }
 
-    /**
-     * Returns whether auto indent is enabled
-     *
-     * @return Enabled or disabled
-     */
-    public boolean isAutoIndent() {
-        return mAutoIndentEnabled;
-    }
-
-    /**
-     * Enable or disable auto indent when insert text through Cursor
-     *
-     * @param enabled Auto Indent state
-     */
-    public void setAutoIndent(boolean enabled) {
-        mAutoIndentEnabled = enabled;
-    }
-
-    /**
-     * Set language for auto indent
-     *
-     * @param lang The target language
-     */
-    public void setLanguage(EditorLanguage lang) {
-        mLanguage = lang;
-    }
-
-    /**
-     * Set tab width for auto indent
-     *
-     * @param width tab width
-     */
-    public void setTabWidth(int width) {
-        mTabWidth = width;
-    }
-
-    public void onCommitText(CharSequence text) {
-        onCommitText(text, true);
-    }
-
-    /**
-     * Commit text at current state
-     *
-     * @param text Text commit by InputConnection
-     */
-    public void onCommitText(CharSequence text, boolean applyAutoIndent) {
-        if (isSelected()) {
-            mContent.replace(getLeftLine(), getLeftColumn(), getRightLine(), getRightColumn(), text);
-        } else {
-            if(getLeftColumn() < mContent.getColumnCount(getLeftLine())
-               && text.length() == 1
-               && text.charAt(0) == mContent.charAt(getLeftLine(), getLeftColumn())
-               && pairs.contains(text.charAt(0))) {
-                   
-                // Moving the cursor to right through editor is instant
-                // If we don't really have an instance of the editor, fall back to 'less efficient' method
-                if(this.editor != null)
-                    this.editor.moveSelectionRight();
-                else 
-                    set(getLeftLine(), getLeftColumn() + 1);
-            } else {
-                if (mAutoIndentEnabled && text.length() != 0 && applyAutoIndent) {
-                    char first = text.charAt(0);
-                    if (first == '\n') {
-                        String line = mContent.getLineString(getLeftLine());
-                        int p = 0, count = 0;
-                        while (p < getLeftColumn()) {
-                            if (isWhitespace(line.charAt(p))) {
-                                if (line.charAt(p) == '\t') {
-                                    count += mTabWidth;
-                                } else {
-                                    count++;
-                                }
-                                p++;
-                            } else {
-                                break;
-                            }
-                        }
-                        String sub = line.substring(0, getLeftColumn());
-                        try {
-                            count += mLanguage.getIndentAdvance(sub);
-                        } catch (Exception e) {}
-                        StringBuilder sb = new StringBuilder(text);
-                        sb.insert(1, createIndent(count));
-                        text = sb;
-                    }
-                }
-                mContent.insert(getLeftLine(), getLeftColumn(), text);
-            }
-        }
-    }
-
-    /**
-     * Create indent space
-     *
-     * @param space Target width effect
-     * @return Generated space string
-     */
-    private String createIndent(int space) {
-        StringBuilder s = new StringBuilder();
-        for (int i = 0; i < space; i++) {
-            s.append(' ');
-        }
-        return s.toString();
-    }
-
-    /**
-     * Handle delete submit by InputConnection
-     */
-    public void onDeleteKeyPressed() {
-        if (isSelected()) {
-            mContent.delete(getLeftLine(), getLeftColumn(), getRightLine(), getRightColumn());
-        } else {
-            final int line = getLeftLine ();
-            int col = getLeftColumn(), len = 1;
-    
-            final int tabCount = StudioApp.getInstance ().getPrefManager ().getEditorTabSize ();
-            if (col - tabCount >= 0) {
-                final int start = col - tabCount;
-                final CharSequence sub = mContent.subContent (line, start, line, col);
-                
-                boolean deleteSpaces = true;
-                for (int i = 0; i < sub.length (); i++) {
-                    final char c = sub.charAt (i);
-                    if (!isWhitespace (c)) {
-                        deleteSpaces = false;
-                        break;
-                    }
-                }
-                
-                if (deleteSpaces) {
-                    mContent.delete (line, start, line, col);
-                    return;
-                }
-            }
-            
-            //Do not put cursor inside a emotion character
-            if (col > 1) {
-                char before = mContent.charAt(getLeftLine(), col - 2);
-                if (isEmoji(before)) {
-                    len = 2;
-                }
-            }
-            mContent.delete(getLeftLine(), getLeftColumn() - len, getLeftLine(), getLeftColumn());
-        }
-    }
-
     /**
      * Get position after moving left once
      * @param position A packed pair (line, column) describing the original position
@@ -379,13 +205,8 @@ public final class  Cursor {
         int line = IntPair.getFirst(position);
         int column = IntPair.getSecond(position);
         if (column - 1 >= 0) {
-            if (column - 2 >= 0) {
-                char ch = mContent.charAt(line, column - 2);
-                if (isEmoji(ch)) {
-                    column--;
-                }
-            }
-            return IntPair.pack(line, column - 1);
+            column = TextLayoutHelper.get().getCurPosLeft(column, mContent.getLine(line));
+            return IntPair.pack(line, column);
         } else {
             if (line == 0) {
                 return 0;
@@ -405,15 +226,10 @@ public final class  Cursor {
         int line = IntPair.getFirst(position);
         int column = IntPair.getSecond(position);
         int c_column = mContent.getColumnCount(line);
+
         if (column + 1 <= c_column) {
-            char ch = mContent.charAt(line, column);
-            if (isEmoji(ch)) {
-                column++;
-                if (column + 1 > c_column) {
-                    column--;
-                }
-            }
-           return IntPair.pack(line, column + 1);
+            column = TextLayoutHelper.get().getCurPosRight(column, mContent.getLine(line));
+           return IntPair.pack(line, column);
         } else {
             if (line + 1 == mContent.getLineCount()) {
                 return IntPair.pack(line, c_column);
@@ -432,7 +248,7 @@ public final class  Cursor {
         int line = IntPair.getFirst(position);
         int column = IntPair.getSecond(position);
         if (line - 1 < 0) {
-            line = 1;
+            return IntPair.pack(0, 0);
         }
         int c_column = mContent.getColumnCount(line - 1);
         if (column > c_column) {
@@ -551,7 +367,7 @@ public final class  Cursor {
         } else if (/* endIdx > left && */ endIdx < right) {
             if (beginIdx <= left) {
                 mLeft = mIndexer.getCharPosition(beginIdx).fromThis();
-                mRight = mIndexer.getCharPosition(right - (endIdx - Math.max(beginIdx, left))).fromThis();
+                mRight = mIndexer.getCharPosition(right - (endIdx - left)).fromThis();
             } else {
                 mRight = mIndexer.getCharPosition(right - (endIdx - beginIdx)).fromThis();
             }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/FormatThread.java b/editor/src/main/java/io/github/rosemoe/sora/text/FormatThread.java
new file mode 100644
index 000000000..6e4905419
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/FormatThread.java
@@ -0,0 +1,69 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import io.github.rosemoe.sora.lang.Language;
+
+public class FormatThread extends Thread {
+
+    private CharSequence mText;
+
+    private Language mLanguage;
+
+    private FormatResultReceiver mReceiver;
+
+    public FormatThread(CharSequence text, Language language, FormatResultReceiver receiver) {
+        mText = text;
+        mLanguage = language;
+        mReceiver = receiver;
+    }
+
+    @Override
+    public void run() {
+        CharSequence result = null;
+        try {
+            CharSequence chars = ((mText instanceof Content) ? (((Content) mText).toStringBuilder()) : new StringBuilder(mText));
+            result = mLanguage.format(chars);
+        } catch (Throwable e) {
+            if (mReceiver != null) {
+                mReceiver.onFormatFail(e);
+            }
+        }
+        if (mReceiver != null) {
+            mReceiver.onFormatSucceed(mText, result);
+        }
+        mReceiver = null;
+        mLanguage = null;
+        mText = null;
+    }
+
+    public interface FormatResultReceiver {
+
+        void onFormatSucceed(CharSequence originalText, CharSequence newText);
+
+        void onFormatFail(Throwable throwable);
+
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/ICUUtils.java b/editor/src/main/java/io/github/rosemoe/sora/text/ICUUtils.java
new file mode 100644
index 000000000..bfd7d284e
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/ICUUtils.java
@@ -0,0 +1,77 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import android.icu.text.BreakIterator;
+import android.os.Build;
+
+import io.github.rosemoe.sora.util.IntPair;
+import io.github.rosemoe.sora.util.MyCharacter;
+
+/**
+ * Utility class for invoking ICU library according to Android platform.
+ * Provide some default implementation on old platforms without ICU.
+ *
+ * @author Rosemoe
+ */
+public class ICUUtils {
+
+    /**
+     * Get word edges for the given offset
+     * @param text Text to analyze
+     * @param offset Required char offset of word
+     * @return Packed value of (start, end) pair. Always contains the position {@code offset}
+     */
+    public static long getWordEdges(CharSequence text, int offset) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            var itr = BreakIterator.getWordInstance();
+            itr.setText(new CharSequenceIterator(text));
+            int end = itr.following(offset);
+            int start = itr.previous();
+            if (offset >= start && offset <= end) {
+                return IntPair.pack(start, end);
+            } else {
+                return getWordEdgesFallback(text, offset);
+            }
+        } else {
+            return getWordEdgesFallback(text, offset);
+        }
+    }
+
+    /**
+     * Primitive implementation of {@link #getWordEdges(CharSequence, int)}
+     */
+    private static long getWordEdgesFallback(CharSequence text, int offset) {
+        int start = offset;
+        int end = offset;
+        while (start > 0 && MyCharacter.isJavaIdentifierPart(text.charAt(start - 1))) {
+            start--;
+        }
+        while (end < text.length() && MyCharacter.isJavaIdentifierPart(text.charAt(end))) {
+            end++;
+        }
+        return IntPair.pack(start, end);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/Indexer.java b/editor/src/main/java/io/github/rosemoe/sora/text/Indexer.java
new file mode 100644
index 000000000..f9ebd7144
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/Indexer.java
@@ -0,0 +1,91 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import androidx.annotation.NonNull;
+
+/**
+ * A helper class for ITextContent to transform (line,column) and index
+ *
+ * @author Rose
+ */
+public interface Indexer {
+
+    /**
+     * Get the index of (line,column)
+     *
+     * @param line   The line position of index
+     * @param column The column position of index
+     * @return Calculated index
+     */
+    int getCharIndex(int line, int column);
+
+    /**
+     * Get the line position of index
+     *
+     * @param index The index you want to know its line
+     * @return Line position of index
+     */
+    int getCharLine(int index);
+
+    /**
+     * Get the column position of index
+     *
+     * @param index The index you want to know its column
+     * @return Column position of index
+     */
+    int getCharColumn(int index);
+
+    /**
+     * Get the CharPosition for the given index
+     *
+     * @param index The index you want to get
+     * @return The CharPosition object.
+     */
+    @NonNull
+    CharPosition getCharPosition(int index);
+
+    /**
+     * Get the CharPosition for the given (line,column)
+     *
+     * @param line   The line position you want to get
+     * @param column The column position you want to get
+     * @return The CharPosition object.
+     */
+    @NonNull
+    CharPosition getCharPosition(int line, int column);
+
+    /**
+     * @see #getCharPosition(int)
+     * @param dest Destination of result
+     */
+    void getCharPosition(int index, @NonNull CharPosition dest);
+
+    /**
+     * @see #getCharPosition(int, int)
+     * @param dest Destination of result
+     */
+    void getCharPosition(int line, int column, @NonNull CharPosition dest);
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/LineNumberCalculator.java b/editor/src/main/java/io/github/rosemoe/sora/text/LineNumberCalculator.java
old mode 100755
new mode 100644
similarity index 62%
rename from app/src/main/java/io/github/rosemoe/editor/text/LineNumberCalculator.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/LineNumberCalculator.java
index 1e07785da..447a6b5fc
--- a/app/src/main/java/io/github/rosemoe/editor/text/LineNumberCalculator.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/LineNumberCalculator.java
@@ -1,19 +1,27 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
 
 /**
  * A line number calculator for spanner
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/LineRemoveListener.java b/editor/src/main/java/io/github/rosemoe/sora/text/LineRemoveListener.java
new file mode 100644
index 000000000..83bb46155
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/LineRemoveListener.java
@@ -0,0 +1,41 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+/**
+ * A listener to know when a ContentLine object is removed from Content object
+ *
+ * @author Rose
+ */
+public interface LineRemoveListener {
+
+    /**
+     * When a ContentLine is removed from Content, this method is called
+     *
+     * @param content Caller Content
+     * @param line    ContentLine object removed
+     */
+    void onRemove(Content content, ContentLine line);
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/NoCacheIndexer.java b/editor/src/main/java/io/github/rosemoe/sora/text/NoCacheIndexer.java
new file mode 100644
index 000000000..2fa03393f
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/NoCacheIndexer.java
@@ -0,0 +1,50 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+/**
+ * Indexer without cache
+ *
+ * @author Rose
+ */
+public final class NoCacheIndexer extends CachedIndexer implements Indexer {
+
+    /**
+     * Create a indexer without cache
+     *
+     * @param content Target content
+     */
+    public NoCacheIndexer(Content content) {
+        super(content);
+        //Disable dynamic indexing
+        if (super.getMaxCacheSize() != 0) {
+            super.setMaxCacheSize(0);
+        }
+        if (super.isHandleEvent()) {
+            super.setHandleEvent(false);
+        }
+    }
+
+}
+
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/SpanRecycler.java b/editor/src/main/java/io/github/rosemoe/sora/text/SpanRecycler.java
old mode 100755
new mode 100644
similarity index 50%
rename from app/src/main/java/io/github/rosemoe/editor/text/SpanRecycler.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/SpanRecycler.java
index fe2fe706f..f1d704500
--- a/app/src/main/java/io/github/rosemoe/editor/text/SpanRecycler.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/SpanRecycler.java
@@ -1,25 +1,35 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
+
+import android.util.Log;
 
 import java.util.List;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
 
-import io.github.rosemoe.editor.struct.Span;
+import io.github.rosemoe.sora.lang.styling.Span;
 
 public class SpanRecycler {
 
@@ -50,7 +60,7 @@ public class SpanRecycler {
 
     private class RecycleThread extends Thread {
 
-        private final static String LOG_TAG = "Span Recycle Thread";
+        private final static String LOG_TAG = "SpanRecycler";
 
         RecycleThread() {
             setDaemon(true);
@@ -67,17 +77,24 @@ public class SpanRecycler {
                         for (List<Span> spans : spanMap) {
                             int size = spans.size();
                             for (int i = 0; i < size; i++) {
-                                spans.remove(size - 1 - i).recycle();
+                                var recycled = spans.remove(size - 1 - i).recycle();
+                                if (!recycled) {
+                                    break;
+                                }
                                 count++;
                             }
                         }
-                        //Log.i(LOG_TAG, "Recycled " + count + " spans");
+                        spanMap.clear();
+                        Log.i(LOG_TAG, "Called recycle() on " + count + " spans");
                     } catch (InterruptedException e) {
                         e.printStackTrace();
                         break;
                     }
                 }
-            } catch (Exception e) {}
+            } catch (Exception e) {
+                Log.w(LOG_TAG, e);
+            }
+            Log.i(LOG_TAG, "Recycler exited");
         }
 
     }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/TextLayoutHelper.java b/editor/src/main/java/io/github/rosemoe/sora/text/TextLayoutHelper.java
new file mode 100644
index 000000000..957b01b9b
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/TextLayoutHelper.java
@@ -0,0 +1,86 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import android.text.DynamicLayout;
+import android.text.Editable;
+import android.text.Layout;
+import android.text.Selection;
+import android.text.TextPaint;
+
+/**
+ * Helper class for indirectly calling Paint#getTextRunCursor(), which is
+ * responsible for cursor controlling.
+ *
+ * @author Rosemoe
+ */
+public class TextLayoutHelper {
+
+    private static final ThreadLocal<TextLayoutHelper> sLocal;
+
+    static {
+        sLocal = new ThreadLocal<>();
+    }
+
+    public static TextLayoutHelper get() {
+        var v = sLocal.get();
+        if (v == null) {
+            v = new TextLayoutHelper();
+            sLocal.set(v);
+        }
+        return v;
+    }
+
+    private final Editable text = Editable.Factory.getInstance().newEditable("");
+    private final DynamicLayout layout;
+
+    private TextLayoutHelper() {
+        layout = new DynamicLayout(text, new TextPaint(), Integer.MAX_VALUE / 2, Layout.Alignment.ALIGN_NORMAL, 0, 0 , true);
+    }
+
+    public int getCurPosLeft(int offset, CharSequence s) {
+        int left = Math.max(0, offset - 20);
+        int index = offset - left;
+        text.append(s, left, Math.min(s.length(), offset + 20));
+        Selection.setSelection(text, index);
+        Selection.moveLeft(text, layout);
+        index = Selection.getSelectionStart(text);
+        text.clear();
+        Selection.removeSelection(text);
+        return left + index;
+    }
+
+    public int getCurPosRight(int offset, CharSequence s) {
+        int left = Math.max(0, offset - 20);
+        int index = offset - left;
+        text.append(s, left, Math.min(s.length(), offset + 20));
+        Selection.setSelection(text, index);
+        Selection.moveRight(text, layout);
+        index = Selection.getSelectionStart(text);
+        text.clear();
+        Selection.removeSelection(text);
+        return left + index;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/text/TextReference.java b/editor/src/main/java/io/github/rosemoe/sora/text/TextReference.java
new file mode 100644
index 000000000..b2ebbf581
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/TextReference.java
@@ -0,0 +1,125 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.text;
+
+import androidx.annotation.NonNull;
+
+import java.util.Objects;
+
+/**
+ * Reference of a {@link CharSequence} object, which allows
+ * to access the original sequence in read-only mode, and attach a
+ * {@link Validator} to validate access to check whether reject the
+ * read access.
+ * This can be useful when reading text in multiple threads, with the ability
+ * to interrupt that thread when the actual text changes.
+ *
+ * @author Rosemoe
+ */
+public class TextReference implements CharSequence {
+
+    private final CharSequence ref;
+    private final int start, end;
+    private Validator validator;
+
+    public TextReference(@NonNull CharSequence ref) {
+        this(ref, 0, ref.length());
+    }
+
+    public TextReference(@NonNull CharSequence ref, int start, int end) {
+        this.ref = Objects.requireNonNull(ref);
+        this.start = start;
+        this.end = end;
+        if (start > end) {
+            throw new IllegalArgumentException("start > end");
+        }
+        if (start < 0) {
+            throw new StringIndexOutOfBoundsException(start);
+        }
+        if (end > ref.length()) {
+            throw new StringIndexOutOfBoundsException(end);
+        }
+    }
+
+    /**
+     * Get original text of the reference
+     */
+    @NonNull
+    public CharSequence getReference() {
+        return ref;
+    }
+
+    @Override
+    public int length() {
+        validateAccess();
+        return end - start;
+    }
+
+    @Override
+    public char charAt(int index) {
+        if (index < 0 || index >= length()) {
+            throw new StringIndexOutOfBoundsException(index);
+        }
+        validateAccess();
+        return ref.charAt(start + index);
+    }
+
+    @NonNull
+    @Override
+    public CharSequence subSequence(int start, int end) {
+        if (start < 0 || start >= length()) {
+            throw new StringIndexOutOfBoundsException(start);
+        }
+        if (end < 0 || end >= length()) {
+            throw new StringIndexOutOfBoundsException(end);
+        }
+        validateAccess();
+        return new TextReference(ref, this.start + start, this.start + end).setValidator(validator);
+    }
+
+    public TextReference setValidator(Validator validator) {
+        this.validator = validator;
+        return this;
+    }
+
+    public void validateAccess() {
+        if (validator != null)
+            validator.validate();
+    }
+
+    public interface Validator {
+        void validate();
+    }
+
+    public static class ValidateFailedException extends RuntimeException {
+
+        public ValidateFailedException() {
+        }
+
+        public ValidateFailedException(String message) {
+            super(message);
+        }
+
+    }
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/TextUtils.java b/editor/src/main/java/io/github/rosemoe/sora/text/TextUtils.java
old mode 100755
new mode 100644
similarity index 50%
rename from app/src/main/java/io/github/rosemoe/editor/text/TextUtils.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/TextUtils.java
index 5d7234f47..b62042558
--- a/app/src/main/java/io/github/rosemoe/editor/text/TextUtils.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/TextUtils.java
@@ -1,19 +1,27 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
 
 public class TextUtils {
 
@@ -34,6 +42,11 @@ public class TextUtils {
         return count;
     }
 
+    /**
+     * Create indent space
+     *
+     * @return Generated space string
+     */
     public static String createIndent(int indentSize, int tabWidth, boolean useTab) {
         indentSize = Math.max(0, indentSize);
         int tab = 0;
diff --git a/app/src/main/java/io/github/rosemoe/editor/text/UndoManager.java b/editor/src/main/java/io/github/rosemoe/sora/text/UndoManager.java
old mode 100755
new mode 100644
similarity index 88%
rename from app/src/main/java/io/github/rosemoe/editor/text/UndoManager.java
rename to editor/src/main/java/io/github/rosemoe/sora/text/UndoManager.java
index 819887ab2..68ce2d7cb
--- a/app/src/main/java/io/github/rosemoe/editor/text/UndoManager.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/text/UndoManager.java
@@ -1,19 +1,27 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.text;
+package io.github.rosemoe.sora.text;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -26,7 +34,6 @@ import java.util.List;
  */
 final class UndoManager implements ContentListener {
 
-    private final Content mContent;
     private final List<ContentAction> mActionStack;
     private boolean mUndoEnabled;
     private int mMaxStackSize;
@@ -37,12 +44,9 @@ final class UndoManager implements ContentListener {
     private boolean mIgnoreModification;
 
     /**
-     * Create UndoManager with the target content
-     *
-     * @param content The Content going to attach
+     * Create an UndoManager
      */
-    protected UndoManager(Content content) {
-        mContent = content;
+    UndoManager() {
         mActionStack = new ArrayList<>();
         mReplaceMark = false;
         mInsertAction = null;
@@ -51,6 +55,13 @@ final class UndoManager implements ContentListener {
         mIgnoreModification = false;
     }
 
+    /**
+     * Check whether we are currently in undo/redo operations
+     */
+    public boolean isModifyingContent() {
+        return mIgnoreModification;
+    }
+
     /**
      * Undo on the given Content
      *
@@ -80,18 +91,14 @@ final class UndoManager implements ContentListener {
     }
 
     /**
-     * Whether can undo
-     *
-     * @return Whether can undo
+     * Whether it can undo
      */
     public boolean canUndo() {
         return isUndoEnabled() && (mStackPointer > 0);
     }
 
     /**
-     * Whether can redo
-     *
-     * @return Whether can redo
+     * Whether it can redo
      */
     public boolean canRedo() {
         return isUndoEnabled() && (mStackPointer < mActionStack.size());
@@ -173,12 +180,12 @@ final class UndoManager implements ContentListener {
      *
      * @param action New {@link ContentAction}
      */
-    private void pushAction(ContentAction action) {
+    private void pushAction(Content content, ContentAction action) {
         if (!isUndoEnabled()) {
             return;
         }
         cleanBeforePush();
-        if (mContent.isInBatchEdit()) {
+        if (content.isInBatchEdit()) {
             if (mActionStack.isEmpty()) {
                 MultiAction a = new MultiAction();
                 a.addAction(action);
@@ -237,9 +244,9 @@ final class UndoManager implements ContentListener {
             ReplaceAction rep = new ReplaceAction();
             rep._delete = mDeleteAction;
             rep._insert = mInsertAction;
-            pushAction(rep);
+            pushAction(content, rep);
         } else {
-            pushAction(mInsertAction);
+            pushAction(content, mInsertAction);
         }
         mReplaceMark = false;
     }
@@ -257,7 +264,7 @@ final class UndoManager implements ContentListener {
         mDeleteAction.startLine = startLine;
         mDeleteAction.text = deletedContent;
         if (!mReplaceMark) {
-            pushAction(mDeleteAction);
+            pushAction(content, mDeleteAction);
         }
     }
 
@@ -286,7 +293,7 @@ final class UndoManager implements ContentListener {
          * Get whether the target action can be merged with this action
          *
          * @param action Target action to merge
-         * @return Whether can merge
+         * @return Whether they can merge
          */
         boolean canMerge(ContentAction action);
 
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/ArrayList.java b/editor/src/main/java/io/github/rosemoe/sora/util/ArrayList.java
new file mode 100644
index 000000000..edbe9a17c
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/ArrayList.java
@@ -0,0 +1,46 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+/**
+ * Expose {@link java.util.ArrayList#removeRange(int, int)} to public.
+ *
+ * {@inheritDoc}
+ */
+public class ArrayList<E> extends java.util.ArrayList<E> {
+
+    public ArrayList() {
+        super();
+    }
+
+    public ArrayList(int initialCapacity) {
+        super(initialCapacity);
+    }
+
+    @Override
+    public void removeRange(int fromIndex, int toIndex) {
+        super.removeRange(fromIndex, toIndex);
+    }
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/util/BinaryHeap.java b/editor/src/main/java/io/github/rosemoe/sora/util/BinaryHeap.java
old mode 100755
new mode 100644
similarity index 82%
rename from app/src/main/java/io/github/rosemoe/editor/util/BinaryHeap.java
rename to editor/src/main/java/io/github/rosemoe/sora/util/BinaryHeap.java
index edb824382..d059f2f58
--- a/app/src/main/java/io/github/rosemoe/editor/util/BinaryHeap.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/BinaryHeap.java
@@ -1,19 +1,27 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.util;
+package io.github.rosemoe.sora.util;
 
 import android.util.SparseIntArray;
 
@@ -157,7 +165,7 @@ public class BinaryHeap {
     public void update(int id, int newValue) {
         int position = idToPosition.get(id, 0);
         if (position == 0) {
-            return;
+            throw new IllegalArgumentException("trying to update with an invalid id");
         }
         int origin = nodes[position].data;
         nodes[position].data = newValue;
@@ -177,7 +185,7 @@ public class BinaryHeap {
     public void remove(int id) {
         int position = idToPosition.get(id, 0);
         if (position == 0) {
-            return;
+            throw new IllegalArgumentException("trying to remove with an invalid id");
         }
         idToPosition.delete(id);
         //Replace removed node with last node
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/IntPair.java b/editor/src/main/java/io/github/rosemoe/sora/util/IntPair.java
new file mode 100644
index 000000000..05ba1f749
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/IntPair.java
@@ -0,0 +1,73 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+/**
+ * Pack two int into a long
+ * Also unpack it
+ * This is convenient while passing data
+ *
+ * @author Rose
+ */
+public class IntPair {
+
+    /**
+     * Convert an integer to a long whose binary bits are equal to the given integer
+     */
+    private static long toUnsignedLong(int x) {
+        return ((long) x) & 0xffffffffL;
+    }
+
+    /**
+     * Pack two int into a long
+     *
+     * @param first  First of pair
+     * @param second Second of pair
+     * @return Packed value
+     */
+    public static long pack(int first, int second) {
+        return (toUnsignedLong(first) << 32L) | toUnsignedLong(second);
+    }
+
+    /**
+     * Get second of pair
+     *
+     * @param packedValue Packed value
+     * @return Second of pair
+     */
+    public static int getSecond(long packedValue) {
+        return (int) (packedValue & 0xFFFFFFFFL);
+    }
+
+    /**
+     * Get first of pair
+     *
+     * @param packedValue Packed value
+     * @return First of pair
+     */
+    public static int getFirst(long packedValue) {
+        return (int) (packedValue >> 32L);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/LongArrayList.java b/editor/src/main/java/io/github/rosemoe/sora/util/LongArrayList.java
new file mode 100644
index 000000000..47b5da9a3
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/LongArrayList.java
@@ -0,0 +1,62 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+/**
+ * ArrayList for primitive type long
+ */
+public class LongArrayList {
+
+    private long[] data;
+    private int length;
+
+    public LongArrayList() {
+        data = new long[64];
+    }
+
+    public void add(long value) {
+        data[length++] = value;
+        if (data.length == length) {
+            long[] newData = new long[length << 1];
+            System.arraycopy(data, 0, newData, 0, length);
+            data = newData;
+        }
+    }
+
+    public int size() {
+        return length;
+    }
+
+    public long get(int index) {
+        if (index > length || index < 0) {
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
+        return data[index];
+    }
+
+    public void clear() {
+        length = 0;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/MyCharacter.java b/editor/src/main/java/io/github/rosemoe/sora/util/MyCharacter.java
new file mode 100644
index 000000000..6d522eedc
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/MyCharacter.java
@@ -0,0 +1,119 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+import java.util.Arrays;
+
+/**
+ * @author Rose
+ * Get whether Identifier part/start quickly
+ */
+public class MyCharacter {
+
+    static {
+        initMapInternal();
+    }
+
+    /**
+     * Compressed bit set for isJavaIdentifierStart()
+     */
+    private static int[] bitsIsStart;
+
+    /**
+     * Compressed bit set for isJavaIdentifierPart()
+     */
+    private static int[] bitsIsPart;
+
+    /**
+     * Get bit in compressed bit set
+     *
+     * @param values   Compressed bit set
+     * @param bitIndex Target index
+     * @return Boolean value at the index
+     */
+    private static boolean get(int[] values, int bitIndex) {
+        return ((values[bitIndex / 32] & (1 << (bitIndex % 32))) != 0);
+    }
+
+    /**
+     * Make the given position's bit true
+     *
+     * @param values   Compressed bit set
+     * @param bitIndex Index of bit
+     */
+    private static void set(int[] values, int bitIndex) {
+        values[bitIndex / 32] |= (1 << (bitIndex % 32));
+    }
+
+    /**
+     * Init maps
+     *
+     * @deprecated The class will be initialized automatically
+     */
+    @Deprecated
+    public static void initMap() {
+        // Empty
+    }
+
+    /**
+     * Init maps
+     */
+    private static void initMapInternal() {
+        if (bitsIsStart != null) {
+            return;
+        }
+        bitsIsPart = new int[2048];
+        bitsIsStart = new int[2048];
+        Arrays.fill(bitsIsPart, 0);
+        Arrays.fill(bitsIsStart, 0);
+        for (int i = 0; i <= 65535; i++) {
+            if (Character.isJavaIdentifierPart((char) i)) {
+                set(bitsIsPart, i);
+            }
+            if (Character.isJavaIdentifierStart((char) i)) {
+                set(bitsIsStart, i);
+            }
+        }
+    }
+
+    /**
+     * @param key Character
+     * @return Whether a identifier part
+     * @see Character#isJavaIdentifierPart(char)
+     */
+    public static boolean isJavaIdentifierPart(int key) {
+        return get(bitsIsPart, key);
+    }
+
+    /**
+     * @param key Character
+     * @return Whether a identifier start
+     * @see Character#isJavaIdentifierStart(char)
+     */
+    public static boolean isJavaIdentifierStart(int key) {
+        return get(bitsIsStart, key);
+    }
+
+}
+
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/Numbers.java b/editor/src/main/java/io/github/rosemoe/sora/util/Numbers.java
new file mode 100644
index 000000000..3fc0bfeae
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/Numbers.java
@@ -0,0 +1,113 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+/**
+ * From Java java.lang.Integer
+ */
+public class Numbers {
+
+    final static char [] DigitTens = {
+            '0', '0', '0', '0', '0', '0', '0', '0', '0', '0',
+            '1', '1', '1', '1', '1', '1', '1', '1', '1', '1',
+            '2', '2', '2', '2', '2', '2', '2', '2', '2', '2',
+            '3', '3', '3', '3', '3', '3', '3', '3', '3', '3',
+            '4', '4', '4', '4', '4', '4', '4', '4', '4', '4',
+            '5', '5', '5', '5', '5', '5', '5', '5', '5', '5',
+            '6', '6', '6', '6', '6', '6', '6', '6', '6', '6',
+            '7', '7', '7', '7', '7', '7', '7', '7', '7', '7',
+            '8', '8', '8', '8', '8', '8', '8', '8', '8', '8',
+            '9', '9', '9', '9', '9', '9', '9', '9', '9', '9',
+    } ;
+
+    final static char [] DigitOnes = {
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+    } ;
+
+    /**
+     * All possible chars for representing a number as a String
+     */
+    final static char[] digits = {
+            '0' , '1' , '2' , '3' , '4' , '5' ,
+            '6' , '7' , '8' , '9' , 'a' , 'b' ,
+            'c' , 'd' , 'e' , 'f' , 'g' , 'h' ,
+            'i' , 'j' , 'k' , 'l' , 'm' , 'n' ,
+            'o' , 'p' , 'q' , 'r' , 's' , 't' ,
+            'u' , 'v' , 'w' , 'x' , 'y' , 'z'
+    };
+
+    final static int [] sizeTable = { 9, 99, 999, 9999, 99999, 999999, 9999999,
+            99999999, 999999999, Integer.MAX_VALUE };
+
+    // Requires positive x
+    public static int stringSize(int x) {
+        for (int i=0; ; i++)
+            if (x <= sizeTable[i])
+                return i+1;
+    }
+
+    public static void getChars(int i, int index, char[] buf) {
+        int q, r;
+        int charPos = index;
+        char sign = 0;
+
+        if (i < 0) {
+            sign = '-';
+            i = -i;
+        }
+
+        // Generate two digits per iteration
+        while (i >= 65536) {
+            q = i / 100;
+            // really: r = i - (q * 100);
+            r = i - ((q << 6) + (q << 5) + (q << 2));
+            i = q;
+            buf [--charPos] = DigitOnes[r];
+            buf [--charPos] = DigitTens[r];
+        }
+
+        // Fall thru to fast mode for smaller numbers
+        // assert(i <= 65536, i);
+        for (;;) {
+            q = (i * 52429) >>> (16+3);
+            r = i - ((q << 3) + (q << 1));  // r = i-(q*10) ...
+            buf [--charPos] = digits [r];
+            i = q;
+            if (i == 0) break;
+        }
+        if (sign != 0) {
+            buf [--charPos] = sign;
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/TemporaryCharBuffer.java b/editor/src/main/java/io/github/rosemoe/sora/util/TemporaryCharBuffer.java
new file mode 100644
index 000000000..5a281d9f5
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/TemporaryCharBuffer.java
@@ -0,0 +1,52 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+public class TemporaryCharBuffer {
+
+    public static char[] obtain(int len) {
+        char[] buf;
+
+        synchronized (TemporaryCharBuffer.class) {
+            buf = sTemp;
+            sTemp = null;
+        }
+
+        if (buf == null || buf.length < len) {
+            buf = new char[len];
+        }
+
+        return buf;
+    }
+
+    public static void recycle(char[] temp) {
+        if (temp.length > 1000) return;
+
+        synchronized (TemporaryCharBuffer.class) {
+            sTemp = temp;
+        }
+    }
+
+    private static char[] sTemp = null;
+}
\ No newline at end of file
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/TemporaryFloatBuffer.java b/editor/src/main/java/io/github/rosemoe/sora/util/TemporaryFloatBuffer.java
new file mode 100644
index 000000000..5f58dfbaa
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/TemporaryFloatBuffer.java
@@ -0,0 +1,53 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+public class TemporaryFloatBuffer {
+
+    public static float[] obtain(int len) {
+        float[] buf;
+
+        synchronized (TemporaryFloatBuffer.class) {
+            buf = sTemp;
+            sTemp = null;
+        }
+
+        if (buf == null || buf.length < len) {
+            buf = new float[len];
+        }
+
+        return buf;
+    }
+
+    public static void recycle(float[] temp) {
+        if (temp.length > 1000) return;
+
+        synchronized (TemporaryFloatBuffer.class) {
+            sTemp = temp;
+        }
+    }
+
+    private static float[] sTemp = null;
+    
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/ThemeUtils.java b/editor/src/main/java/io/github/rosemoe/sora/util/ThemeUtils.java
new file mode 100644
index 000000000..63e7e74aa
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/ThemeUtils.java
@@ -0,0 +1,37 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+import android.util.TypedValue;
+import android.view.ContextThemeWrapper;
+
+public class ThemeUtils {
+
+    public static int getColorPrimary(ContextThemeWrapper context){
+        TypedValue typedValue = new TypedValue();
+        context.getTheme().resolveAttribute(android.R.attr.colorPrimary, typedValue, true);
+        return typedValue.data;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/util/TrieTree.java b/editor/src/main/java/io/github/rosemoe/sora/util/TrieTree.java
new file mode 100644
index 000000000..18d2d7cad
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/util/TrieTree.java
@@ -0,0 +1,178 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.util;
+
+/**
+ * @author Rose
+ * TrieTree to query values quickly
+ */
+public class TrieTree<T> {
+
+    public final Node<T> root;
+    private int maxLen;
+
+    public TrieTree() {
+        root = new Node<>();
+        maxLen = 0;
+    }
+
+    public void put(String v, T token) {
+        maxLen = Math.max(v.length(), maxLen);
+        addInternal(root, v, 0, v.length(), token);
+    }
+
+    public void put(CharSequence v, int off, int len, T token) {
+        maxLen = Math.max(maxLen, len);
+        addInternal(root, v, off, len, token);
+    }
+
+    public T get(CharSequence s, int offset, int len) {
+        if (len > maxLen) {
+            return null;
+        }
+        return getInternal(root, s, offset, len);
+    }
+
+    private T getInternal(Node<T> node, CharSequence s, int offset, int len) {
+        if (len == 0) {
+            return node.token;
+        }
+        char point = s.charAt(offset);
+        Node<T> sub = node.map.get(point);
+        if (sub == null) {
+            return null;
+        }
+        return getInternal(sub, s, offset + 1, len - 1);
+    }
+
+    private void addInternal(Node<T> node, CharSequence v, int i, int len, T token) {
+        char point = v.charAt(i);
+        Node<T> sub = node.map.get(point);
+        if (sub == null) {
+            sub = new Node<>();
+            node.map.put(point, sub);
+        }
+        if (len == 1) {
+            sub.token = token;
+        } else {
+            addInternal(sub, v, i + 1, len - 1, token);
+        }
+    }
+
+    public static class Node<T> {
+
+        public final HashCharMap<Node<T>> map;
+
+        public T token;
+
+        public Node() {
+            this.map = new HashCharMap<>();
+        }
+
+    }
+
+    /**
+     * 固定长度哈希表
+     *
+     * @author Rose
+     */
+    public static class HashCharMap<V> {
+
+        private final LinkedPair<V>[] columns;
+
+        private final LinkedPair<V>[] ends;
+
+        private final static int CAPACITY = 64;
+
+        @SuppressWarnings("unchecked")
+        public HashCharMap() {
+            columns = new LinkedPair[CAPACITY];
+            ends = new LinkedPair[CAPACITY];
+        }
+
+
+        private static int position(int first) {
+            return Math.abs(first ^ (first << 6) * ((first & 1) != 0 ? 3 : 1)) % CAPACITY;
+        }
+
+        public V get(char first) {
+            int position = position(first);
+            LinkedPair<V> pair = columns[position];
+            while (pair != null) {
+                if (pair.first == first) {
+                    return pair.second;
+                }
+                pair = pair.next;
+            }
+            return null;
+        }
+
+        private LinkedPair<V> get(char first, int position) {
+            LinkedPair<V> pair = columns[position];
+            while (pair != null) {
+                if (pair.first == first) {
+                    return pair;
+                }
+                pair = pair.next;
+            }
+            return null;
+        }
+
+        public void put(char first, V second) {
+            int position = position(first);
+            if (ends[position] == null) {
+                columns[position] = ends[position] = new LinkedPair<>();
+                ends[position].first = first;
+                ends[position].second = second;
+                return;
+            }
+            LinkedPair<V> p = get(first, position);
+            if (p == null) {
+                p = ends[position].next = new LinkedPair<>();
+                ends[position] = p;
+            }
+            p.first = first;
+            p.second = second;
+        }
+
+
+    }
+
+    /**
+     * 数据节点
+     *
+     * @author Rose
+     */
+    public static class LinkedPair<V> {
+
+        public LinkedPair<V> next;
+
+        public char first;
+
+        public V second;
+
+    }
+
+}
+
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/CodeEditor.java b/editor/src/main/java/io/github/rosemoe/sora/widget/CodeEditor.java
new file mode 100644
index 000000000..810e7dd5f
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/CodeEditor.java
@@ -0,0 +1,5059 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import static io.github.rosemoe.sora.util.Numbers.stringSize;
+
+import android.annotation.SuppressLint;
+import android.app.AlertDialog;
+import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Matrix;
+import android.graphics.Path;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.RenderNode;
+import android.graphics.Typeface;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Looper;
+import android.text.InputType;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.util.MutableInt;
+import android.util.TypedValue;
+import android.view.ActionMode;
+import android.view.ContextThemeWrapper;
+import android.view.GestureDetector;
+import android.view.InputDevice;
+import android.view.KeyEvent;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.ScaleGestureDetector;
+import android.view.View;
+import android.view.ViewConfiguration;
+import android.view.ViewParent;
+import android.view.accessibility.AccessibilityNodeInfo;
+import android.view.inputmethod.CursorAnchorInfo;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.ExtractedText;
+import android.view.inputmethod.ExtractedTextRequest;
+import android.view.inputmethod.InputConnection;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
+import android.widget.OverScroller;
+import android.widget.SearchView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.Px;
+import androidx.annotation.RequiresApi;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import io.github.rosemoe.sora.R;
+import io.github.rosemoe.sora.annotations.Experimental;
+import io.github.rosemoe.sora.annotations.UnsupportedUserUsage;
+import io.github.rosemoe.sora.event.ContentChangeEvent;
+import io.github.rosemoe.sora.event.Event;
+import io.github.rosemoe.sora.event.EventManager;
+import io.github.rosemoe.sora.event.EventReceiver;
+import io.github.rosemoe.sora.event.ScrollEvent;
+import io.github.rosemoe.sora.event.SelectionChangeEvent;
+import io.github.rosemoe.sora.graphics.BufferedDrawPoints;
+import io.github.rosemoe.sora.graphics.GraphicTextRow;
+import io.github.rosemoe.sora.graphics.Paint;
+import io.github.rosemoe.sora.lang.EmptyLanguage;
+import io.github.rosemoe.sora.lang.Language;
+import io.github.rosemoe.sora.lang.analysis.AnalyzeManager;
+import io.github.rosemoe.sora.lang.analysis.StyleReceiver;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandleResult;
+import io.github.rosemoe.sora.lang.smartEnter.NewlineHandler;
+import io.github.rosemoe.sora.lang.styling.CodeBlock;
+import io.github.rosemoe.sora.lang.styling.EmptyReader;
+import io.github.rosemoe.sora.lang.styling.ExternalRenderer;
+import io.github.rosemoe.sora.lang.styling.Span;
+import io.github.rosemoe.sora.lang.styling.Spans;
+import io.github.rosemoe.sora.lang.styling.Styles;
+import io.github.rosemoe.sora.lang.styling.TextStyle;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentLine;
+import io.github.rosemoe.sora.text.ContentListener;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.text.Cursor;
+import io.github.rosemoe.sora.text.FormatThread;
+import io.github.rosemoe.sora.text.LineRemoveListener;
+import io.github.rosemoe.sora.text.TextLayoutHelper;
+import io.github.rosemoe.sora.text.TextUtils;
+import io.github.rosemoe.sora.util.IntPair;
+import io.github.rosemoe.sora.util.LongArrayList;
+import io.github.rosemoe.sora.util.Numbers;
+import io.github.rosemoe.sora.util.TemporaryCharBuffer;
+import io.github.rosemoe.sora.util.TemporaryFloatBuffer;
+import io.github.rosemoe.sora.util.ThemeUtils;
+import io.github.rosemoe.sora.widget.component.EditorAutoCompletion;
+import io.github.rosemoe.sora.widget.component.EditorBuiltinComponent;
+import io.github.rosemoe.sora.widget.component.EditorCompletionAdapter;
+import io.github.rosemoe.sora.widget.component.EditorTextActionWindow;
+import io.github.rosemoe.sora.widget.component.Magnifier;
+import io.github.rosemoe.sora.widget.layout.Layout;
+import io.github.rosemoe.sora.widget.layout.LineBreakLayout;
+import io.github.rosemoe.sora.widget.layout.Row;
+import io.github.rosemoe.sora.widget.layout.RowIterator;
+import io.github.rosemoe.sora.widget.layout.WordwrapLayout;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+import io.github.rosemoe.sora.widget.style.SelectionHandleStyle;
+import io.github.rosemoe.sora.widget.style.builtin.HandleStyleSideDrop;
+
+/**
+ * CodeEditor is an editor that can highlight text regions by doing basic syntax analyzing
+ * This project in GitHub: https://github.com/Rosemoe/sora-editor
+ * <p>
+ * Note:
+ * Row and line are different in this editor
+ * When we say 'row', it means a line displayed on screen. It can be a part of a line in the text object.
+ * When we say 'line', it means a real line in the original text.
+ *
+ * @author Rosemoe
+ */
+@SuppressWarnings("unused")
+public class CodeEditor extends View implements ContentListener, StyleReceiver, FormatThread.FormatResultReceiver, LineRemoveListener {
+
+    /**
+     * Digits for line number measuring
+     */
+    private final static String NUMBER_DIGITS = "0 1 2 3 4 5 6 7 8 9";
+
+    /**
+     * The default size when creating the editor object. Unit is sp.
+     */
+    public static final int DEFAULT_TEXT_SIZE = 18;
+
+    /**
+     * The default cursor blinking period
+     */
+    public static final int DEFAULT_CURSOR_BLINK_PERIOD = 500;
+
+    /**
+     * Draw whitespace characters before line content start
+     * <strong>Whitespace here only means space and tab</strong>
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_WHITESPACE_LEADING = 1;
+
+    /**
+     * Draw whitespace characters inside line content
+     * <strong>Whitespace here only means space and tab</strong>
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_WHITESPACE_INNER = 1 << 1;
+
+    /**
+     * Draw whitespace characters after line content end
+     * <strong>Whitespace here only means space and tab</strong>
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_WHITESPACE_TRAILING = 1 << 2;
+
+    /**
+     * Draw whitespace characters even if it is a line full of whitespaces
+     * To apply this, you must enable {@link #FLAG_DRAW_WHITESPACE_LEADING}
+     * <strong>Whitespace here only means space and tab</strong>
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE = 1 << 3;
+
+    /**
+     * Draw newline signals in text
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_LINE_SEPARATOR = 1 << 4;
+
+    /**
+     * Draw the tab character the same as space.
+     * If not set, tab will be display to be a line.
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_TAB_SAME_AS_SPACE = 1 << 5;
+
+    /**
+     * Draw the whitespaces in selected text
+     *
+     * @see #setNonPrintablePaintingFlags(int)
+     */
+    public static final int FLAG_DRAW_WHITESPACE_IN_SELECTION = 1 << 6;
+
+    /**
+     * Adjust the completion window's position scheme according to the device's screen size.
+     */
+    public static final int WINDOW_POS_MODE_AUTO = 0;
+
+    /**
+     * Completion window always follow the cursor
+     */
+    public static final int WINDOW_POS_MODE_FOLLOW_CURSOR_ALWAYS = 1;
+
+    /**
+     * Completion window always stay at the bottom of view and occupies the
+     * horizontal viewport
+     */
+    public static final int WINDOW_POS_MODE_FULL_WIDTH_ALWAYS = 2;
+
+    /**
+     * Text size scale of small graph
+     */
+    private static final float SCALE_MINI_GRAPH = 0.9f;
+
+    /*
+     * Internal state identifiers of action mode
+     */
+    static final int ACTION_MODE_NONE = 0;
+    static final int ACTION_MODE_SEARCH_TEXT = 1;
+    static final int ACTION_MODE_SELECT_TEXT = 2;
+    private static final String LOG_TAG = "CodeEditor";
+    protected SymbolPairMatch mLanguageSymbolPairs;
+    Layout mLayout;
+    int mStartedActionMode;
+    private int mTabWidth;
+    private int mCursorPosition;
+    private int mDownX = 0;
+    private int mInputType;
+    private int mNonPrintableOptions;
+    private int mCachedLineNumberWidth;
+    private int mCompletionPosMode;
+    private long mTimestamp;
+    private long mAvailableFloatArrayRegion;
+    private float mDpUnit;
+    private float mDividerWidth;
+    private float mDividerMargin;
+    private float mInsertSelWidth;
+    private float mBlockLineWidth;
+    private float mVerticalScrollFactor;
+    private float mLineInfoTextSize;
+    private boolean mWait;
+    private boolean mScalable;
+    private boolean mEditable;
+    private boolean mWordwrap;
+    private boolean mUndoEnabled;
+    private boolean mDisplayLnPanel;
+    private boolean mLineNumberEnabled;
+    private boolean mBlockLineEnabled;
+    private boolean mForceHorizontalScrollable;
+    private boolean mHighlightCurrentBlock;
+    private boolean mHighlightCurrentLine;
+    private boolean mVerticalScrollBarEnabled;
+    private boolean mHorizontalScrollBarEnabled;
+    private boolean mCursorAnimation;
+    private boolean mPinLineNumber;
+    private boolean mFirstLineNumberAlwaysVisible;
+    private boolean mLigatureEnabled;
+    private boolean mLastCursorState;
+    private RectF mRect;
+    private SelectionHandleStyle.HandleDescriptor mLeftHandle;
+    private SelectionHandleStyle.HandleDescriptor mRightHandle;
+    private SelectionHandleStyle.HandleDescriptor mInsertHandle;
+    private RectF mVerticalScrollBar;
+    private RectF mHorizontalScrollBar;
+    private Path mPath;
+    private ClipboardManager mClipboardManager;
+    private InputMethodManager mInputMethodManager;
+    private Cursor mCursor;
+    private Content mText;
+    private Paint mPaint;
+    private Paint mPaintOther;
+    private Paint mPaintGraph;
+    private ContentLine mBuffer;
+    private Matrix mMatrix;
+    private Rect mViewRect;
+    private EditorColorScheme mColors;
+    private String mLnTip = "Line:";
+    private Language mLanguage;
+    private long mLastMakeVisible = 0;
+    private EditorAutoCompletion mCompletionWindow;
+    private EditorTouchEventHandler mEventHandler;
+    private Paint.Align mLineNumberAlign;
+    private GestureDetector mBasicDetector;
+    protected EditorTextActionWindow mTextActionWindow;
+    private ScaleGestureDetector mScaleDetector;
+    EditorInputConnection mConnection;
+    private CursorAnchorInfo.Builder mAnchorInfoBuilder;
+    private MaterialEdgeEffect mVerticalEdgeGlow;
+    private MaterialEdgeEffect mHorizontalGlow;
+    private ExtractedTextRequest mExtracting;
+    private FormatThread mFormatThread;
+    private EditorSearcher mSearcher;
+    private EventManager mEventManager;
+    private CursorAnimator mCursorAnimator;
+    private Paint.FontMetricsInt mTextMetrics;
+    private Paint.FontMetricsInt mLineNumberMetrics;
+    private Paint.FontMetricsInt mGraphMetrics;
+    private SelectionHandleStyle mHandleStyle;
+    private CursorBlink mCursorBlink;
+    protected List<Span> defSpans = new ArrayList<>(2);
+    private final LongArrayList mPostDrawLineNumbers = new LongArrayList();
+    private final LongArrayList mPostDrawCurrentLines = new LongArrayList();
+    private CharPosition mSelectionAnchor;
+    private BufferedDrawPoints mDrawPoints;
+    private HwAcceleratedRenderer mRenderer;
+    private DirectAccessProps mProps;
+    private Bundle mExtraArguments;
+    private Styles mStyles;
+    final KeyMetaStates mKeyMetaStates = new KeyMetaStates(this);
+
+    public CodeEditor(Context context) {
+        this(context, null);
+    }
+
+    public CodeEditor(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public CodeEditor(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public CodeEditor(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        initialize(attrs, defStyleAttr, defStyleRes);
+    }
+
+    /**
+     * Get builtin component so that you can enable/disable them or do some other actions.
+     *
+     * @see io.github.rosemoe.sora.widget.component
+     */
+    @SuppressWarnings("unchecked")
+    public <T extends EditorBuiltinComponent> T getComponent(Class<T> clazz) {
+        if (clazz == EditorAutoCompletion.class) {
+            return (T) mCompletionWindow;
+        } else if (clazz == Magnifier.class) {
+            return (T) mEventHandler.mMagnifier;
+        } else if (clazz == EditorTextActionWindow.class) {
+            return (T) mTextActionWindow;
+        } else {
+            throw new IllegalArgumentException("Unknown component type");
+        }
+    }
+
+    /**
+     * Checks whether this region has visible region on screen
+     *
+     * @param begin The start line of code block
+     * @param end   The end line of code block
+     * @param first The first visible line on screen
+     * @param last  The last visible line on screen
+     * @return Whether this block can be seen
+     */
+    private static boolean hasVisibleRegion(int begin, int end, int first, int last) {
+        return (end > first && begin < last);
+    }
+
+    /**
+     * Cancel the next animation for {@link CodeEditor#ensurePositionVisible(int, int)}
+     */
+    protected void cancelAnimation() {
+        mLastMakeVisible = System.currentTimeMillis();
+    }
+
+    /**
+     * Get the width of line number and divider line
+     *
+     * @return The width
+     */
+    public float measureTextRegionOffset() {
+        return isLineNumberEnabled() ? measureLineNumber() + mDividerMargin * 2 + mDividerWidth : mDpUnit * 5;
+    }
+
+    /**
+     * Get the rect of left selection handle painted on view
+     *
+     * @return Descriptor of left handle
+     */
+    public SelectionHandleStyle.HandleDescriptor getLeftHandleDescriptor() {
+        return mLeftHandle;
+    }
+
+    /**
+     * Get the rect of right selection handle painted on view
+     *
+     * @return Descriptor of right handle
+     */
+    public SelectionHandleStyle.HandleDescriptor getRightHandleDescriptor() {
+        return mRightHandle;
+    }
+
+    /**
+     * Get the character's x offset on view
+     *
+     * @param line   The line position of character
+     * @param column The column position of character
+     * @return The x offset on screen
+     */
+    public float getOffset(int line, int column) {
+        return mLayout.getCharLayoutOffset(line, column)[1] + measureTextRegionOffset() - getOffsetX();
+    }
+
+    /**
+     * Prepare editor
+     *
+     * Initialize variants
+     */
+    private void initialize(AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        Log.i(LOG_TAG, COPYRIGHT);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            var configuration = ViewConfiguration.get(getContext());
+            mVerticalScrollFactor = configuration.getScaledVerticalScrollFactor();
+        } else {
+            try {
+                var a = getContext().obtainStyledAttributes(new int[] {android.R.attr.listPreferredItemHeight});
+                mVerticalScrollFactor = a.getFloat(0, 32);
+                a.recycle();
+            } catch (Exception e) {
+                Log.e(LOG_TAG, "Failed to get scroll factor", e);
+                mVerticalScrollFactor = 32;
+            }
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            mRenderer = new HwAcceleratedRenderer(this);
+        }
+        mProps = new DirectAccessProps();
+        mEventManager = new EventManager();
+        mDpUnit = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10, Resources.getSystem().getDisplayMetrics()) / 10F;
+        mDividerWidth = 2 * mDpUnit;
+        mInsertSelWidth = mDividerWidth / 2;
+        mDividerMargin = mDpUnit * 6;
+        mDrawPoints = new BufferedDrawPoints();
+        mPaint = new Paint();
+        mPaintOther = new Paint();
+        mPaintGraph = new Paint();
+        mMatrix = new Matrix();
+        mPath = new Path();
+        mHandleStyle = new HandleStyleSideDrop(getContext());
+        mSearcher = new EditorSearcher(this);
+        mCursorAnimator = new CursorAnimator(this);
+        setCursorBlinkPeriod(DEFAULT_CURSOR_BLINK_PERIOD);
+        mAnchorInfoBuilder = new CursorAnchorInfo.Builder();
+        mPaint.setAntiAlias(true);
+        mPaintOther.setAntiAlias(true);
+        mPaintGraph.setAntiAlias(true);
+        mPaintOther.setTypeface(Typeface.MONOSPACE);
+        mStartedActionMode = ACTION_MODE_NONE;
+        setTextSize(DEFAULT_TEXT_SIZE);
+        setLineInfoTextSize(mPaint.getTextSize());
+        mColors = new EditorColorScheme(this);
+        mEventHandler = new EditorTouchEventHandler(this);
+        mBasicDetector = new GestureDetector(getContext(), mEventHandler);
+        mBasicDetector.setOnDoubleTapListener(mEventHandler);
+        mScaleDetector = new ScaleGestureDetector(getContext(), mEventHandler);
+        mViewRect = new Rect(0, 0, 0, 0);
+        mRect = new RectF();
+        mInsertHandle = new SelectionHandleStyle.HandleDescriptor();
+        mLeftHandle = new SelectionHandleStyle.HandleDescriptor();
+        mRightHandle = new SelectionHandleStyle.HandleDescriptor();
+        mVerticalScrollBar = new RectF();
+        mHorizontalScrollBar = new RectF();
+        mLineNumberAlign = Paint.Align.RIGHT;
+        mWait = false;
+        mBlockLineEnabled = true;
+        mBlockLineWidth = 1.5f;
+        mInputMethodManager = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+        mClipboardManager = (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
+        setUndoEnabled(true);
+        mCursorPosition = -1;
+        setScalable(true);
+        setFocusable(true);
+        setFocusableInTouchMode(true);
+        mConnection = new EditorInputConnection(this);
+        mCompletionWindow = new EditorAutoCompletion(this);
+        mVerticalEdgeGlow = new MaterialEdgeEffect();
+        mHorizontalGlow = new MaterialEdgeEffect();
+        mTextActionWindow = new EditorTextActionWindow(this);
+        setEditorLanguage(null);
+        setText(null);
+        setTabWidth(4);
+        setHighlightCurrentLine(true);
+        setVerticalScrollBarEnabled(true);
+        setHighlightCurrentBlock(true);
+        setDisplayLnPanel(true);
+        setHorizontalScrollBarEnabled(true);
+        setFirstLineNumberAlwaysVisible(true);
+        setCursorAnimationEnabled(true);
+        setEditable(true);
+        setLineNumberEnabled(true);
+        setHardwareAcceleratedDrawAllowed(true);
+        setInterceptParentHorizontalScrollIfNeeded(false);
+        setTypefaceText(Typeface.DEFAULT);
+        setCompletionWndPositionMode(WINDOW_POS_MODE_AUTO);
+        mPaintOther.setStrokeWidth(getDpUnit() * 1.8f);
+        mPaintOther.setStrokeCap(Paint.Cap.ROUND);
+        // Issue #41 View being highlighted when focused on Android 11
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            setDefaultFocusHighlightEnabled(false);
+        }
+        if (getContext() instanceof ContextThemeWrapper) {
+            setEdgeEffectColor(ThemeUtils.getColorPrimary((ContextThemeWrapper) getContext()));
+        }
+    }
+
+    /**
+     * Invalidate the whole hardware-accelerated renderer
+     */
+    private void invalidateHwRenderer() {
+        if (mRenderer != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            mRenderer.invalidate();
+        }
+    }
+
+    /**
+     * Invalidate the region in hardware-accelerated renderer
+     */
+    private void invalidateChanged(int startLine, int endLine) {
+        if (mRenderer != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q && mCursor != null) {
+            if (mRenderer.invalidateInRegion(startLine, endLine)) {
+                invalidate();
+            }
+        }
+    }
+
+    /**
+     * Invalidate the cursor region in hardware-accelerated renderer
+     */
+    private void invalidateInCursor() {
+        invalidateChanged(mCursor.getLeftLine(), mCursor.getRightLine());
+    }
+
+    /**
+     * Set how should we control the position&size of completion window
+     *
+     * @see #WINDOW_POS_MODE_AUTO
+     * @see #WINDOW_POS_MODE_FOLLOW_CURSOR_ALWAYS
+     * @see #WINDOW_POS_MODE_FULL_WIDTH_ALWAYS
+     */
+    public void setCompletionWndPositionMode(int mode) {
+        mCompletionPosMode = mode;
+        updateCompletionWindowPosition();
+    }
+
+    /**
+     * @see #setCompletionWndPositionMode(int)
+     */
+    public int getCompletionWndPositionMode() {
+        return mCompletionPosMode;
+    }
+
+    /**
+     * Get {@code DirectAccessProps} object of the editor.
+     *
+     * You can update some features in editor with the instance without disturb to call methods.
+     */
+    public DirectAccessProps getProps() {
+        return mProps;
+    }
+
+    /**
+     * Set whether line number region will scroll together with code region
+     *
+     * @see CodeEditor#isLineNumberPinned()
+     */
+    public void setPinLineNumber(boolean pinLineNumber) {
+        mPinLineNumber = pinLineNumber;
+        if (isLineNumberEnabled()) {
+            invalidate();
+        }
+    }
+
+    /**
+     * @see CodeEditor#setPinLineNumber(boolean)
+     */
+    public boolean isLineNumberPinned() {
+        return mPinLineNumber;
+    }
+
+    /**
+     * Show first line number in screen in word wrap mode
+     *
+     * @see CodeEditor#isFirstLineNumberAlwaysVisible()
+     */
+    public void setFirstLineNumberAlwaysVisible(boolean enabled) {
+        mFirstLineNumberAlwaysVisible = enabled;
+        if (isWordwrap()) {
+            invalidate();
+        }
+    }
+
+    /**
+     * @see CodeEditor#setFirstLineNumberAlwaysVisible(boolean)
+     */
+    public boolean isFirstLineNumberAlwaysVisible() {
+        return mFirstLineNumberAlwaysVisible;
+    }
+
+    /**
+     * Inserts the given text in the editor.
+     * <p>
+     * This method allows you to insert texts externally to the content of editor.
+     * The content of {@param text} is not checked to be exactly characters of symbols.
+     *
+     * @throws IllegalArgumentException If the {@param selectionRegion} is invalid
+     * @param text Text to insert, usually a text of symbols
+     * @param selectionOffset New selection position relative to the start of text to insert.
+     *                        Ranging from 0 to text.length()
+     */
+    public void insertText(String text, int selectionOffset) {
+        if (selectionOffset < 0 || selectionOffset > text.length()) {
+            throw new IllegalArgumentException("selectionOffset is invalid");
+        }
+        var cur = getText().getCursor();
+        if (cur.isSelected()) {
+            deleteText();
+            notifyIMEExternalCursorChange();
+        }        mText.insert(cur.getRightLine(), cur.getRightColumn(), text);
+        notifyIMEExternalCursorChange();
+        if (selectionOffset != text.length()) {
+            var pos = mText.getIndexer().getCharPosition(cur.getRight() - (text.length() - selectionOffset));
+            setSelection(pos.line, pos.column);
+        }
+    }
+
+    /**
+     * Set adapter for auto-completion window
+     * Will take effect next time the window updates
+     *
+     * @param adapter New adapter, maybe null
+     */
+    public void setAutoCompletionItemAdapter(@Nullable EditorCompletionAdapter adapter) {
+        mCompletionWindow.setAdapter(adapter);
+    }
+
+    /**
+     * Set cursor blinking period
+     * If zero or negative period is passed, the cursor will always be shown.
+     *
+     * @param period The period time of cursor blinking
+     */
+    public void setCursorBlinkPeriod(int period) {
+        if (mCursorBlink == null) {
+            mCursorBlink = new CursorBlink(this, period);
+        } else {
+            int before = mCursorBlink.period;
+            mCursorBlink.setPeriod(period);
+            if (before <= 0 && mCursorBlink.valid && isAttachedToWindow()) {
+                post(mCursorBlink);
+            }
+        }
+    }
+
+    /**
+     * Enable/disable ligature of all types(except 'rlig').
+     * Generally you should disable them unless enabling this will have no effect on text measuring.
+     * <p>
+     * Disabled by default. If you want to enable ligature of a specified type, use
+     * {@link CodeEditor#setFontFeatureSettings(String)}
+     * <p>
+     * For enabling JetBrainsMono font's ligature, Use like this:
+     * <pre class="pretty-print">
+     * CodeEditor editor = ...;
+     * editor.setFontFeatureSettings(enabled ? null : "'liga' 0,'hlig' 0,'dlig' 0,'clig' 0");
+     * </pre>
+     */
+    public void setLigatureEnabled(boolean enabled) {
+        this.mLigatureEnabled = enabled;
+        setFontFeatureSettings(enabled ? null : "'liga' 0,'calt' 0,'hlig' 0,'dlig' 0,'clig' 0");
+    }
+
+    /**
+     * @see CodeEditor#setLigatureEnabled(boolean)
+     */
+    public boolean isLigatureEnabled() {
+        return mLigatureEnabled;
+    }
+
+    /**
+     * Set font feature settings for all paints used by editor
+     *
+     * @see Paint#setFontFeatureSettings(String)
+     */
+    public void setFontFeatureSettings(String features) {
+        mPaint.setFontFeatureSettingsWrapped(features);
+        mPaintOther.setFontFeatureSettings(features);
+        mPaintGraph.setFontFeatureSettings(features);
+        updateTimestamp();
+    }
+
+    /**
+     * Set the style of selection handler.
+     * @see SelectionHandleStyle
+     * @see io.github.rosemoe.sora.widget.style.builtin.HandleStyleDrop
+     * @see HandleStyleSideDrop
+     */
+    public void setSelectionHandleStyle(@NonNull SelectionHandleStyle style) {
+        mHandleStyle = Objects.requireNonNull(style);
+        invalidate();
+    }
+
+    /**
+     * Returns whether highlight current code block
+     *
+     * @return This module enabled / disabled
+     * @see CodeEditor#setHighlightCurrentBlock(boolean)
+     */
+    public boolean isHighlightCurrentBlock() {
+        return mHighlightCurrentBlock;
+    }
+
+    /**
+     * Whether the editor should use a different color to draw
+     * the current code block line and this code block's start line and end line's
+     * background.
+     *
+     * @param highlightCurrentBlock Enabled / Disabled this module
+     */
+    public void setHighlightCurrentBlock(boolean highlightCurrentBlock) {
+        this.mHighlightCurrentBlock = highlightCurrentBlock;
+        if (!mHighlightCurrentBlock) {
+            mCursorPosition = -1;
+        } else {
+            mCursorPosition = findCursorBlock();
+        }
+        invalidate();
+    }
+
+    /**
+     * Specify whether the editor should use a different color to draw
+     * the background of current line
+     */
+    public void setHighlightCurrentLine(boolean highlightCurrentLine) {
+        mHighlightCurrentLine = highlightCurrentLine;
+        invalidate();
+    }
+
+    /**
+     * @see CodeEditor#setHighlightCurrentLine(boolean)
+     */
+    public boolean isHighlightCurrentLine() {
+        return mHighlightCurrentLine;
+    }
+
+    /**
+     * Get the editor's language.
+     *
+     * @return EditorLanguage
+     */
+    @NonNull
+    public Language getEditorLanguage() {
+        return mLanguage;
+    }
+
+    /**
+     * Set the editor's language.
+     * A language is a for auto-completion,highlight and auto indent analysis.
+     *
+     * @param lang New EditorLanguage for editor
+     */
+    public void setEditorLanguage(@Nullable Language lang) {
+        if (lang == null) {
+            lang = new EmptyLanguage();
+        }
+
+        // Destroy old one
+        var old = mLanguage;
+        if (old != null) {
+            old.getAnalyzeManager().setReceiver(null);
+            old.getAnalyzeManager().destroy();
+            old.destroy();
+        }
+
+        this.mLanguage = lang;
+        this.mStyles = null;
+
+        if (mCompletionWindow != null) {
+            mCompletionWindow.hide();
+        }
+        // Setup new one
+        var mgr = lang.getAnalyzeManager();
+        mgr.setReceiver(this);
+        if (mText != null) {
+            mgr.reset(new ContentReference(mText), mExtraArguments);
+        }
+
+        // Symbol pairs
+        if (mLanguageSymbolPairs != null) {
+            mLanguageSymbolPairs.setParent(null);
+        }
+        mLanguageSymbolPairs = mLanguage.getSymbolPairs();
+        if (mLanguageSymbolPairs == null) {
+            Log.w(LOG_TAG, "Language(" + mLanguage.toString() + ") returned null for symbol pairs. It is a mistake.");
+            mLanguageSymbolPairs = new SymbolPairMatch();
+        }
+        mLanguageSymbolPairs.setParent(mProps.overrideSymbolPairs);
+
+        invalidateHwRenderer();
+        invalidate();
+    }
+
+    /**
+     * Getter
+     *
+     * @return The width in dp unit
+     * @see CodeEditor#setBlockLineWidth(float)
+     */
+    public float getBlockLineWidth() {
+        return mBlockLineWidth;
+    }
+
+    /**
+     * Set the width of code block line
+     *
+     * @param dp Width in dp unit
+     */
+    public void setBlockLineWidth(float dp) {
+        mBlockLineWidth = dp;
+        invalidate();
+    }
+
+    /**
+     * @see #setWordwrap(boolean)
+     */
+    public boolean isWordwrap() {
+        return mWordwrap;
+    }
+
+    /**
+     * Set whether text in editor should be wrapped to fit its size
+     *
+     * @param wordwrap Whether to wrap words
+     */
+    public void setWordwrap(boolean wordwrap) {
+        if (mWordwrap != wordwrap) {
+            mWordwrap = wordwrap;
+            createLayout();
+            if (!wordwrap) {
+                invalidateHwRenderer();
+            }
+            invalidate();
+        }
+    }
+
+    public void setCursorAnimationEnabled(boolean enabled) {
+        if (!enabled) {
+            mCursorAnimator.cancel();
+        }
+        mCursorAnimation = enabled;
+    }
+
+    public boolean isCursorAnimationEnabled() {
+        return mCursorAnimation;
+    }
+
+    /**
+     * Whether display vertical scroll bar when scrolling
+     *
+     * @param enabled Enabled / disabled
+     */
+    public void setScrollBarEnabled(boolean enabled) {
+        mVerticalScrollBarEnabled = mHorizontalScrollBarEnabled = enabled;
+        invalidate();
+    }
+
+    /**
+     * @return Enabled / disabled
+     * @see CodeEditor#setDisplayLnPanel(boolean)
+     */
+    public boolean isDisplayLnPanel() {
+        return mDisplayLnPanel;
+    }
+
+    /**
+     * Whether display the line number panel beside vertical scroll bar
+     * when the scroll bar is touched by user
+     *
+     * @param displayLnPanel Enabled / disabled
+     */
+    public void setDisplayLnPanel(boolean displayLnPanel) {
+        this.mDisplayLnPanel = displayLnPanel;
+        invalidate();
+    }
+
+    /**
+     * @return The prefix
+     * @see CodeEditor#setLnTip(String)
+     */
+    public String getLnTip() {
+        return mLnTip;
+    }
+
+    /**
+     * Set the tip text before line number for the line number panel
+     *
+     * @param prefix The prefix for text
+     */
+    public void setLnTip(String prefix) {
+        if (prefix == null) {
+            prefix = "";
+        }
+        mLnTip = prefix;
+        invalidate();
+    }
+
+    @Override
+    public boolean isHorizontalScrollBarEnabled() {
+        return mHorizontalScrollBarEnabled;
+    }
+
+    @Override
+    public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) {
+        mHorizontalScrollBarEnabled = horizontalScrollBarEnabled;
+    }
+
+    @Override
+    public boolean isVerticalScrollBarEnabled() {
+        return mVerticalScrollBarEnabled;
+    }
+
+    @Override
+    public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) {
+        mVerticalScrollBarEnabled = verticalScrollBarEnabled;
+    }
+
+    /**
+     * Get the rect of vertical scroll bar on view
+     *
+     * @return Rect of scroll bar
+     */
+    protected RectF getVerticalScrollBarRect() {
+        return mVerticalScrollBar;
+    }
+
+    /**
+     * Get the rect of horizontal scroll bar on view
+     *
+     * @return Rect of scroll bar
+     */
+    protected RectF getHorizontalScrollBarRect() {
+        return mHorizontalScrollBar;
+    }
+
+    /**
+     * Get the rect of insert cursor handle on view
+     *
+     * @return Rect of insert handle
+     */
+    public SelectionHandleStyle.HandleDescriptor getInsertHandleDescriptor() {
+        return mInsertHandle;
+    }
+
+    /**
+     * Get text size in pixel unit
+     *
+     * @return Text size in pixel unit
+     * @see CodeEditor#setTextSize(float)
+     * @see CodeEditor#setTextSizePx(float)
+     */
+    @Px
+    public float getTextSizePx() {
+        return mPaint.getTextSize();
+    }
+
+    /**
+     * Set text size in pixel unit
+     *
+     * @param size Text size in pixel unit
+     */
+    public void setTextSizePx(@Px float size) {
+        setTextSizePxDirect(size);
+        createLayout();
+        invalidate();
+    }
+
+    /**
+     * Set text size directly without creating layout or invalidating view
+     *
+     * @param size Text size in pixel unit
+     */
+    protected void setTextSizePxDirect(float size) {
+        mPaint.setTextSizeWrapped(size);
+        mPaintOther.setTextSize(size);
+        mPaintGraph.setTextSize(size * SCALE_MINI_GRAPH);
+        mTextMetrics = mPaint.getFontMetricsInt();
+        mLineNumberMetrics = mPaintOther.getFontMetricsInt();
+        mGraphMetrics = mPaintGraph.getFontMetricsInt();
+        invalidateHwRenderer();
+        updateTimestamp();
+    }
+
+    /**
+     * Paint the view on given Canvas
+     *
+     * @param canvas Canvas you want to draw
+     */
+    public void drawView(Canvas canvas) {
+        if (mFormatThread != null) {
+            String text = "Formatting your code...";
+            float centerY = getHeight() / 2f;
+            drawColor(canvas, mColors.getColor(EditorColorScheme.LINE_NUMBER_PANEL), mRect);
+            float baseline = centerY - getRowHeight() / 2f + getRowBaseline(0);
+            float centerX = getWidth() / 2f;
+            mPaint.setColor(mColors.getColor(EditorColorScheme.LINE_NUMBER_PANEL_TEXT));
+            mPaint.setTextAlign(Paint.Align.CENTER);
+            canvas.drawText(text, centerX, baseline, mPaint);
+            mPaint.setTextAlign(Paint.Align.LEFT);
+            return;
+        }
+        getCursor().updateCache(getFirstVisibleLine());
+
+        EditorColorScheme color = mColors;
+        drawColor(canvas, color.getColor(EditorColorScheme.WHOLE_BACKGROUND), mViewRect);
+
+        float lineNumberWidth = measureLineNumber();
+        float offsetX = -getOffsetX() + measureTextRegionOffset();
+        float textOffset = offsetX;
+
+        if (isWordwrap()) {
+            if (mCachedLineNumberWidth == 0) {
+                mCachedLineNumberWidth = (int) lineNumberWidth;
+            } else if (mCachedLineNumberWidth != (int) lineNumberWidth && !mEventHandler.isScaling) {
+                mCachedLineNumberWidth = (int) lineNumberWidth;
+                createLayout();
+            }
+        } else {
+            mCachedLineNumberWidth = 0;
+        }
+
+        buildMeasureCacheForLines(getFirstVisibleLine(), getLastVisibleLine(), mTimestamp);
+
+        if (mCursor.isSelected()) {
+            mInsertHandle.setEmpty();
+        }
+        if (!mCursor.isSelected()) {
+            mLeftHandle.setEmpty();
+            mRightHandle.setEmpty();
+        }
+
+        boolean lineNumberNotPinned = isLineNumberEnabled() && (isWordwrap() || !isLineNumberPinned());
+
+        LongArrayList postDrawLineNumbers = mPostDrawLineNumbers;
+        postDrawLineNumbers.clear();
+        LongArrayList postDrawCurrentLines = mPostDrawCurrentLines;
+        postDrawCurrentLines.clear();
+        List<DrawCursorTask> postDrawCursor = new ArrayList<>(3);
+        MutableInt firstLn = isFirstLineNumberAlwaysVisible() && isWordwrap() ? new MutableInt(-1) : null;
+
+        drawRows(canvas, textOffset, postDrawLineNumbers, postDrawCursor, postDrawCurrentLines, firstLn);
+
+        offsetX = -getOffsetX();
+
+        if (lineNumberNotPinned) {
+            drawLineNumberBackground(canvas, offsetX, lineNumberWidth + mDividerMargin, color.getColor(EditorColorScheme.LINE_NUMBER_BACKGROUND));
+            int lineNumberColor = mColors.getColor(EditorColorScheme.LINE_NUMBER);
+            int currentLineBgColor = mColors.getColor(EditorColorScheme.CURRENT_LINE);
+            if (mCursorAnimator.isRunning()) {
+                mRect.bottom = (float) mCursorAnimator.animatorBgBottom.getAnimatedValue() - getOffsetY();
+                mRect.top = mRect.bottom - (float) mCursorAnimator.animatorBackground.getAnimatedValue();
+                mRect.left = 0;
+                mRect.right = (int) (textOffset - mDividerMargin);
+                drawColor(canvas, currentLineBgColor, mRect);
+            }
+            for (int i = 0; i < postDrawCurrentLines.size(); i++) {
+                drawRowBackground(canvas, currentLineBgColor, (int) postDrawCurrentLines.get(i), (int) (textOffset - mDividerMargin));
+            }
+            drawDivider(canvas, offsetX + lineNumberWidth + mDividerMargin, color.getColor(EditorColorScheme.LINE_DIVIDER));
+            if (firstLn != null && firstLn.value != -1) {
+                int bottom = getRowBottom(0);
+                float y;
+                if (postDrawLineNumbers.size() == 0 || getRowTop(IntPair.getSecond(postDrawLineNumbers.get(0))) - getOffsetY() > bottom) {
+                    // Free to draw at first line
+                    y = (getRowBottom(0) + getRowTop(0)) / 2f - (mLineNumberMetrics.descent - mLineNumberMetrics.ascent) / 2f - mLineNumberMetrics.ascent;
+                } else {
+                    int row = IntPair.getSecond(postDrawLineNumbers.get(0));
+                    y = (getRowBottom(row - 1) + getRowTop(row - 1)) / 2f - (mLineNumberMetrics.descent - mLineNumberMetrics.ascent) / 2f - mLineNumberMetrics.ascent - getOffsetY();
+                }
+                mPaintOther.setTextAlign(mLineNumberAlign);
+                mPaintOther.setColor(lineNumberColor);
+                switch (mLineNumberAlign) {
+                    case LEFT:
+                        canvas.drawText(Integer.toString(firstLn.value + 1), offsetX, y, mPaintOther);
+                        break;
+                    case RIGHT:
+                        canvas.drawText(Integer.toString(firstLn.value + 1), offsetX + lineNumberWidth, y, mPaintOther);
+                        break;
+                    case CENTER:
+                        canvas.drawText(Integer.toString(firstLn.value + 1), offsetX + (lineNumberWidth + mDividerMargin) / 2f, y, mPaintOther);
+                }
+            }
+            for (int i = 0; i < postDrawLineNumbers.size(); i++) {
+                long packed = postDrawLineNumbers.get(i);
+                drawLineNumber(canvas, IntPair.getFirst(packed), IntPair.getSecond(packed), offsetX, lineNumberWidth, lineNumberColor);
+            }
+        }
+
+        if (!isWordwrap() && isBlockLineEnabled()) {
+            drawBlockLines(canvas, textOffset);
+        }
+
+        if (!mCursorAnimator.isRunning()) {
+            for (var action : postDrawCursor) {
+                action.execute(canvas);
+            }
+        } else {
+            drawSelectionOnAnimation(canvas);
+        }
+
+        if (isLineNumberEnabled() && !lineNumberNotPinned) {
+            drawLineNumberBackground(canvas, 0, lineNumberWidth + mDividerMargin, color.getColor(EditorColorScheme.LINE_NUMBER_BACKGROUND));
+            int lineNumberColor = mColors.getColor(EditorColorScheme.LINE_NUMBER);
+            int currentLineBgColor = mColors.getColor(EditorColorScheme.CURRENT_LINE);
+            if (mCursorAnimator.isRunning()) {
+                mRect.bottom = (float) mCursorAnimator.animatorBgBottom.getAnimatedValue() - getOffsetY();
+                mRect.top = mRect.bottom - (float) mCursorAnimator.animatorBackground.getAnimatedValue();
+                mRect.left = 0;
+                mRect.right = (int) (textOffset - mDividerMargin);
+                drawColor(canvas, currentLineBgColor, mRect);
+            }
+            for (int i = 0; i < postDrawCurrentLines.size(); i++) {
+                drawRowBackground(canvas, currentLineBgColor, (int) postDrawCurrentLines.get(i), (int) (textOffset + getOffsetX() - mDividerMargin));
+            }
+            drawDivider(canvas, lineNumberWidth + mDividerMargin, color.getColor(EditorColorScheme.LINE_DIVIDER));
+            for (int i = 0; i < postDrawLineNumbers.size(); i++) {
+                long packed = postDrawLineNumbers.get(i);
+                drawLineNumber(canvas, IntPair.getFirst(packed), IntPair.getSecond(packed), 0, lineNumberWidth, lineNumberColor);
+            }
+        }
+
+        drawScrollBars(canvas);
+        drawEdgeEffect(canvas);
+
+        rememberDisplayedLines();
+    }
+
+    /**
+     * Update displayed lines after drawing
+     */
+    private void rememberDisplayedLines() {
+        mAvailableFloatArrayRegion = IntPair.pack(getFirstVisibleLine(), getLastVisibleLine());
+    }
+
+    /**
+     * Obtain a float array from previously displayed lines, or either create a new one
+     * if no float array matches the requirement.
+     */
+    private float[] obtainFloatArray(int desiredSize) {
+        var start = IntPair.getFirst(mAvailableFloatArrayRegion);
+        var end = IntPair.getSecond(mAvailableFloatArrayRegion);
+        var firstVis = getFirstVisibleLine();
+        var lastVis = getLastVisibleRow();
+        start = Math.max(0, start - 5);
+        end = Math.min(end + 5, getLineCount());
+        for (int i = start; i < end; i++) {
+            // Find line that is not displaying currently
+            if (i < firstVis || i > lastVis) {
+                var line = mText.getLine(i);
+                if (line.widthCache != null && line.widthCache.length >= desiredSize) {
+                    line.timestamp = 0;
+                    var res = line.widthCache;
+                    line.widthCache = null;
+                    return res;
+                }
+            }
+            // Skip the region because we can't obtain arrays from here
+            if (i >= firstVis && i <= lastVis) {
+                i = lastVis;
+            }
+        }
+        //Log.d(LOG_TAG, "Allocate float[], size = " + desiredSize);
+        return new float[desiredSize];
+    }
+
+    /**
+     * Build measure cache for the given lines, if the timestamp indicates that it is outdated.
+     */
+    private void buildMeasureCacheForLines(int startLine, int endLine, long timestamp) {
+        var text = mText;
+        while (startLine <= endLine && startLine < text.getLineCount()) {
+            ContentLine line = text.getLine(startLine);
+            // Do not create cache for long lines
+            if (line.length() <= 256) {
+                if (line.timestamp < timestamp) {
+                    var gtr = GraphicTextRow.obtain();
+                    if (line.widthCache == null) {
+                        line.widthCache = obtainFloatArray(Math.max(line.length(), 128));
+                    }
+                    gtr.set(line, 0, line.length(), getTabWidth(), getSpansForLine(startLine), mPaint);
+                    gtr.buildMeasureCache();
+                    GraphicTextRow.recycle(gtr);
+                    line.timestamp = timestamp;
+                }
+            } else {
+                line.widthCache = null;
+            }
+            startLine++;
+        }
+    }
+
+    /**
+     * Clear flag in flags
+     * The flag must be power of two
+     *
+     * @param flags Flags to filter
+     * @param flag  The flag to clear
+     * @return Cleared flags
+     */
+    private int clearFlag(int flags, int flag) {
+        return (flags & flag) != 0 ? flags ^ flag : flags;
+    }
+
+    /**
+     * Whether non-printable is to be drawn
+     */
+    protected boolean shouldInitializeNonPrintable() {
+        return clearFlag(clearFlag(mNonPrintableOptions, FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE), FLAG_DRAW_TAB_SAME_AS_SPACE) != 0;
+    }
+
+    private boolean mHardwareAccAllowed;
+
+    /**
+     * Set whether allow the editor to use RenderNode to draw its text.
+     * Enabling this can cause more memory usage, but the editor can display text
+     * much quick.
+     * However, only when hardware accelerate is enabled on this view can the switch
+     * make a difference.
+     */
+    @Experimental
+    public void setHardwareAcceleratedDrawAllowed(boolean acceleratedDraw) {
+        mHardwareAccAllowed = acceleratedDraw;
+        if (acceleratedDraw && !isWordwrap()) {
+            invalidateHwRenderer();
+        }
+    }
+
+    /**
+     * @see #setHardwareAcceleratedDrawAllowed(boolean)
+     */
+    @Experimental
+    public boolean isHardwareAcceleratedDrawAllowed() {
+        return mHardwareAccAllowed;
+    }
+
+    @RequiresApi(29)
+    protected void updateLineDisplayList(RenderNode renderNode, int line, Spans.Reader spans) {
+        final float waveLength = getDpUnit() * 18;
+        final float amplitude = getDpUnit() * 4;
+        prepareLine(line);
+        int columnCount = getText().getColumnCount(line);
+        float widthLine = measureText(mBuffer, 0, columnCount, line) + getDpUnit() * 20;
+        renderNode.setPosition(0, 0, (int) widthLine, getRowHeight() + (int) amplitude);
+        Canvas canvas = renderNode.beginRecording();
+        if (spans == null) {
+            spans = new EmptyReader();
+        }
+        int spanOffset = 0;
+        float paintingOffset = 0;
+        int row = 0;
+        float phi = 0f;
+        Span span = spans.getSpanAt(spanOffset);
+        // Draw by spans
+        long lastStyle = 0;
+        while (columnCount > span.column) {
+            int spanEnd = spanOffset + 1 >= spans.getSpanCount() ? columnCount : spans.getSpanAt(spanOffset + 1).column;
+            spanEnd = Math.min(columnCount, spanEnd);
+            int paintStart = span.column;
+            int paintEnd = Math.min(columnCount, spanEnd);
+            float width = measureText(mBuffer, paintStart, paintEnd - paintStart, line);
+            ExternalRenderer renderer = span.renderer;
+
+            // Invoke external renderer preDraw
+            if (renderer != null && renderer.requirePreDraw()) {
+                int saveCount = canvas.save();
+                canvas.translate(paintingOffset, getRowTop(row));
+                canvas.clipRect(0f, 0f, width, getRowHeight());
+                try {
+                    renderer.draw(canvas, mPaint, mColors, true);
+                } catch (Exception e) {
+                    Log.e(LOG_TAG, "Error while invoking external renderer", e);
+                }
+                canvas.restoreToCount(saveCount);
+            }
+
+            // Apply font style
+            long styleBits = span.getStyleBits();
+            if (span.getStyleBits() != lastStyle) {
+                mPaint.setFakeBoldText(TextStyle.isBold(styleBits));
+                if (TextStyle.isItalics(styleBits)) {
+                    mPaint.setTextSkewX(-0.2f);
+                } else {
+                    mPaint.setTextSkewX(0);
+                }
+                lastStyle = styleBits;
+            }
+
+            int backgroundColorId = span.getBackgroundColorId();
+            if (backgroundColorId != 0) {
+                drawRowRegionBackground(canvas, paintingOffset, row, 0, columnCount, paintStart, paintEnd, mColors.getColor(backgroundColorId), line);
+            }
+
+            // Draw text
+            drawRegionText(canvas, paintingOffset, getRowBaseline(row), line, paintStart, paintEnd, span.column, spanEnd, columnCount, mColors.getColor(span.getForegroundColorId()));
+
+            // Draw strikethrough
+            if ((span.problemFlags & Span.FLAG_DEPRECATED) != 0 || TextStyle.isStrikeThrough(span.style)) {
+                mPaintOther.setColor(Color.BLACK);
+                canvas.drawLine(paintingOffset, getRowTop(row) + getRowHeight() / 2f, paintingOffset + width, getRowTop(row) + getRowHeight() / 2f, mPaintOther);
+            }
+
+            // Draw underline
+            if (span.underlineColor != 0) {
+                mRect.bottom = getRowBottom(row) - mDpUnit * 1;
+                mRect.top = mRect.bottom - getRowHeight() * 0.08f;
+                mRect.left = paintingOffset;
+                mRect.right = paintingOffset + width;
+                drawColor(canvas, span.underlineColor, mRect);
+            }
+
+            // Draw issue curly underline
+            if (span.problemFlags > 0 && Integer.highestOneBit(span.problemFlags) != Span.FLAG_DEPRECATED) {
+                int color = 0;
+                switch (Integer.highestOneBit(span.problemFlags)) {
+                    case Span.FLAG_ERROR:
+                        color = mColors.getColor(EditorColorScheme.PROBLEM_ERROR);
+                        break;
+                    case Span.FLAG_WARNING:
+                        color = mColors.getColor(EditorColorScheme.PROBLEM_WARNING);
+                        break;
+                    case Span.FLAG_TYPO:
+                        color = mColors.getColor(EditorColorScheme.PROBLEM_TYPO);
+                        break;
+                }
+                if (color != 0 && span.column >= 0 && spanEnd - span.column >= 0) {
+                    // Start and end X offset
+                    float startOffset = measureText(mBuffer, 0, span.column, line);
+                    float lineWidth = measureText(mBuffer, Math.max(0, span.column), spanEnd - span.column, line) + phi;
+                    float centerY = getRowBottom(row);
+                    // Clip region due not to draw outside the horizontal region
+                    canvas.save();
+                    canvas.clipRect(startOffset, 0, startOffset + lineWidth, canvas.getHeight());
+                    canvas.translate(startOffset - phi, centerY);
+                    // Draw waves
+                    mPath.reset();
+                    mPath.moveTo(0, 0);
+                    int waveCount = (int) Math.ceil(lineWidth / waveLength);
+                    for (int i = 0; i < waveCount; i++) {
+                        mPath.quadTo(waveLength * i + waveLength / 4, amplitude, waveLength * i + waveLength / 2, 0);
+                        mPath.quadTo(waveLength * i + waveLength * 3 / 4, -amplitude, waveLength * i + waveLength, 0);
+                    }
+                    phi = waveLength - (waveCount * waveLength - lineWidth);
+                    // Draw path
+                    mPaint.setStrokeWidth(getDpUnit() * 1.8f);
+                    mPaintOther.setStyle(Paint.Style.STROKE);
+                    mPaintOther.setColor(color);
+                    canvas.drawPath(mPath, mPaintOther);
+                    canvas.restore();
+                }
+                mPaintOther.setStyle(Paint.Style.FILL);
+            } else {
+                phi = 0f;
+            }
+
+            // Invoke external renderer postDraw
+            if (renderer != null && renderer.requirePostDraw()) {
+                int saveCount = canvas.save();
+                canvas.translate(paintingOffset, getRowTop(row));
+                canvas.clipRect(0f, 0f, width, getRowHeight());
+                try {
+                    renderer.draw(canvas, mPaint, mColors, false);
+                } catch (Exception e) {
+                    Log.e(LOG_TAG, "Error while invoking external renderer", e);
+                }
+                canvas.restoreToCount(saveCount);
+            }
+
+            paintingOffset += width;
+
+            if (paintEnd == columnCount) {
+                break;
+            }
+            spanOffset++;
+            if (spanOffset < spans.getSpanCount()) {
+                span = spans.getSpanAt(spanOffset);
+            } else {
+                spanOffset--;
+            }
+        }
+        renderNode.endRecording();
+        mPaint.setTextSkewX(0);
+        mPaint.setFakeBoldText(false);
+    }
+
+    /**
+     * Draw rows with a {@link RowIterator}
+     *
+     * @param canvas              Canvas to draw
+     * @param offset              Offset of text region start
+     * @param postDrawLineNumbers Line numbers to be drawn later
+     * @param postDrawCursor      Cursors to be drawn later
+     */
+    protected void drawRows(Canvas canvas, float offset, LongArrayList postDrawLineNumbers, List<DrawCursorTask> postDrawCursor, LongArrayList postDrawCurrentLines, MutableInt requiredFirstLn) {
+        int firstVis = getFirstVisibleRow();
+        final float waveLength = getDpUnit() * 18;
+        final float amplitude = getDpUnit() * 4;
+        RowIterator rowIterator = mLayout.obtainRowIterator(firstVis);
+        List<Span> temporaryEmptySpans = null;
+        Spans spans = mStyles == null ? null : mStyles.spans;
+        List<Integer> matchedPositions = new ArrayList<>();
+        int currentLine = mCursor.isSelected() ? -1 : mCursor.getLeftLine();
+        int currentLineBgColor = mColors.getColor(EditorColorScheme.CURRENT_LINE);
+        int lastPreparedLine = -1;
+        int spanOffset = 0;
+        int leadingWhitespaceEnd = 0;
+        int trailingWhitespaceStart = 0;
+        float circleRadius = 0f;
+        if (shouldInitializeNonPrintable()) {
+            float spaceWidth = mPaint.getSpaceWidth();
+            float maxD = Math.min(getRowHeight(), spaceWidth);
+            maxD *= 0.25f;
+            circleRadius = maxD / 2;
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q && !isWordwrap() && canvas.isHardwareAccelerated() && isHardwareAcceleratedDrawAllowed()) {
+            mRenderer.keepCurrentInDisplay(firstVis, getLastVisibleRow());
+        }
+        float offset2 = getOffsetX() - measureTextRegionOffset();
+        float offset3 = offset2 - mDpUnit * 15;
+
+        // Step 1 - Draw background of rows
+        for (int row = firstVis; row <= getLastVisibleRow() && rowIterator.hasNext(); row++) {
+            Row rowInf = rowIterator.next();
+            int line = rowInf.lineIndex;
+            int columnCount = mText.getColumnCount(line);
+            if (lastPreparedLine != line) {
+                computeMatchedPositions(line, matchedPositions);
+                prepareLine(line);
+                lastPreparedLine = line;
+            }
+            // Get visible region on the line
+            float[] charPos = findFirstVisibleChar(offset3, rowInf.startColumn, rowInf.endColumn, mBuffer, line);
+            int firstVisibleChar = (int) charPos[0];
+            float paintingOffset = charPos[1] - offset2;
+            int lastVisibleChar = (int) findFirstVisibleChar(offset2 + getWidth(), firstVisibleChar + 1, rowInf.endColumn, rowInf.startColumn, mBuffer, line)[0];
+
+            // Draw current line background
+            if (line == currentLine && !mCursorAnimator.isRunning()) {
+                drawRowBackground(canvas, currentLineBgColor, row);
+                postDrawCurrentLines.add(row);
+            }
+
+            // Draw matched text background
+            if (!matchedPositions.isEmpty()) {
+                for (int position : matchedPositions) {
+                    drawRowRegionBackground(canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, position, position + mSearcher.mSearchText.length(), mColors.getColor(EditorColorScheme.MATCHED_TEXT_BACKGROUND), line);
+                }
+            }
+
+            // Draw selected text background
+            if (mCursor.isSelected() && line >= mCursor.getLeftLine() && line <= mCursor.getRightLine()) {
+                int selectionStart = 0;
+                int selectionEnd = columnCount;
+                if (line == mCursor.getLeftLine()) {
+                    selectionStart = mCursor.getLeftColumn();
+                }
+                if (line == mCursor.getRightLine()) {
+                    selectionEnd = mCursor.getRightColumn();
+                }
+                if (mText.getColumnCount(line) == 0 && line != mCursor.getRightLine()) {
+                    mRect.top = getRowTop(row) - getOffsetY();
+                    mRect.bottom = getRowBottom(row) - getOffsetY();
+                    mRect.left = paintingOffset;
+                    mRect.right = mRect.left + mPaint.getSpaceWidth() * 2;
+                    mPaint.setColor(mColors.getColor(EditorColorScheme.SELECTED_TEXT_BACKGROUND));
+                    canvas.drawRoundRect(mRect, getRowHeight() * 0.13f, getRowHeight() * 0.13f, mPaint);
+                } else {
+                    drawRowRegionBackground(canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, selectionStart, selectionEnd, mColors.getColor(EditorColorScheme.SELECTED_TEXT_BACKGROUND), line);
+                }
+            }
+        }
+        rowIterator.reset();
+
+        // Draw current line background on animation
+        if (mCursorAnimator.isRunning()) {
+            mRect.bottom = (float) mCursorAnimator.animatorBgBottom.getAnimatedValue() - getOffsetY();
+            mRect.top = mRect.bottom - (float) mCursorAnimator.animatorBackground.getAnimatedValue();
+            mRect.left = 0;
+            mRect.right = mViewRect.right;
+            drawColor(canvas, currentLineBgColor, mRect);
+        }
+
+        // Step 2 - Draw text and text decorations
+        long lastStyle = 0;
+        for (int row = firstVis; row <= getLastVisibleRow() && rowIterator.hasNext(); row++) {
+            Row rowInf = rowIterator.next();
+            int line = rowInf.lineIndex;
+            ContentLine contentLine = mText.getLine(line);
+            int columnCount = contentLine.length();
+            if (row == firstVis && requiredFirstLn != null) {
+                requiredFirstLn.value = line;
+            } else if (rowInf.isLeadingRow) {
+                postDrawLineNumbers.add(IntPair.pack(line, row));
+            }
+
+            // Prepare data
+            if (lastPreparedLine != line) {
+                lastPreparedLine = line;
+                prepareLine(line);
+                spanOffset = 0;
+                if (shouldInitializeNonPrintable()) {
+                    long positions = findLeadingAndTrailingWhitespacePos(line);
+                    leadingWhitespaceEnd = IntPair.getFirst(positions);
+                    trailingWhitespaceStart = IntPair.getSecond(positions);
+                }
+            }
+
+            // Get visible region on the line
+            float[] charPos = findFirstVisibleChar(offset3, rowInf.startColumn, rowInf.endColumn, mBuffer, line);
+            int firstVisibleChar = (int) charPos[0];
+            float paintingOffset = charPos[1] - offset2;
+            int lastVisibleChar = (int) findFirstVisibleChar(offset2 + getWidth(), firstVisibleChar + 1, rowInf.endColumn, rowInf.startColumn, mBuffer, line)[0];
+
+            float backupOffset = paintingOffset;
+
+            // Draw text here
+            if (!mHardwareAccAllowed || !canvas.isHardwareAccelerated() || isWordwrap() || Build.VERSION.SDK_INT < Build.VERSION_CODES.Q || rowInf.endColumn - rowInf.startColumn > 256 /* Save memory */) {
+                // Draw without hardware acceleration
+                // Get spans
+                var reader = spans == null ? new EmptyReader() : spans.read();
+                try {
+                    reader.moveToLine(line);
+                }catch (Exception e) {
+                    reader = new EmptyReader();
+                }
+                // Seek for first span
+                float phi = 0f;
+                while (spanOffset + 1 < reader.getSpanCount()) {
+                    if (reader.getSpanAt(spanOffset + 1).column <= firstVisibleChar) {
+                        // Update phi
+                        Span span = reader.getSpanAt(spanOffset);
+                        if (span.problemFlags > 0 && Integer.highestOneBit(span.problemFlags) != Span.FLAG_DEPRECATED) {
+                            float lineWidth;
+                            int spanEnd = Math.min(rowInf.endColumn, reader.getSpanAt(spanOffset + 1).column);
+                            if (isWordwrap()) {
+                                lineWidth = measureText(mBuffer, Math.max(firstVisibleChar, span.column), spanEnd - Math.max(firstVisibleChar, span.column), line) + phi;
+                            } else {
+                                lineWidth = measureText(mBuffer, span.column, spanEnd - span.column, line) + phi;
+                            }
+                            int waveCount = (int) Math.ceil(lineWidth / waveLength);
+                            phi = waveLength - (waveCount * waveLength - lineWidth);
+                        } else {
+                            phi = 0f;
+                        }
+                        spanOffset++;
+                    } else {
+                        break;
+                    }
+                }
+                Span span = reader.getSpanAt(spanOffset);
+                // Draw by spans
+                while (lastVisibleChar > span.column) {
+                    int spanEnd = spanOffset + 1 >= reader.getSpanCount() ? columnCount : reader.getSpanAt(spanOffset + 1).column;
+                    spanEnd = Math.min(columnCount, spanEnd);
+                    int paintStart = Math.max(firstVisibleChar, span.column);
+                    if (paintStart >= columnCount) {
+                        break;
+                    }
+                    int paintEnd = Math.min(lastVisibleChar, spanEnd);
+                    if (paintStart > paintEnd) {
+                        break;
+                    }
+                    float width = measureText(mBuffer, paintStart, paintEnd - paintStart, line);
+                    ExternalRenderer renderer = span.renderer;
+
+                    // Invoke external renderer preDraw
+                    if (renderer != null && renderer.requirePreDraw()) {
+                        int saveCount = canvas.save();
+                        canvas.translate(paintingOffset, getRowTop(row) - getOffsetY());
+                        canvas.clipRect(0f, 0f, width, getRowHeight());
+                        try {
+                            renderer.draw(canvas, mPaint, mColors, true);
+                        } catch (Exception e) {
+                            Log.e(LOG_TAG, "Error while invoking external renderer", e);
+                        }
+                        canvas.restoreToCount(saveCount);
+                    }
+
+                    // Apply font style
+                    long styleBits = span.getStyleBits();
+                    if (span.getStyleBits() != lastStyle) {
+                        mPaint.setFakeBoldText(TextStyle.isBold(styleBits));
+                        if (TextStyle.isItalics(styleBits)) {
+                            mPaint.setTextSkewX(-0.2f);
+                        } else {
+                            mPaint.setTextSkewX(0);
+                        }
+                        lastStyle = styleBits;
+                    }
+
+                    int backgroundColorId = span.getBackgroundColorId();
+                    if (backgroundColorId != 0) {
+                        drawRowRegionBackground(canvas, paintingOffset, row, firstVisibleChar, lastVisibleChar, paintStart, paintEnd, mColors.getColor(backgroundColorId), line);
+                    }
+
+                    // Draw text
+                    drawRegionText(canvas, paintingOffset, getRowBaseline(row) - getOffsetY(), line, paintStart, paintEnd, span.column, spanEnd, columnCount, mColors.getColor(span.getForegroundColorId()));
+
+                    // Draw strikethrough
+                    if ((span.problemFlags & Span.FLAG_DEPRECATED) != 0 || TextStyle.isStrikeThrough(styleBits)) {
+                        mPaintOther.setColor(Color.BLACK);
+                        canvas.drawLine(paintingOffset, getRowTop(row) + getRowHeight() / 2f - getOffsetY(), paintingOffset + width, getRowTop(row) + getRowHeight() / 2f - getOffsetY(), mPaintOther);
+                    }
+
+                    // Draw underline
+                    if (span.underlineColor != 0) {
+                        mRect.bottom = getRowBottom(row) - getOffsetY() - mDpUnit * 1;
+                        mRect.top = mRect.bottom - getRowHeight() * 0.08f;
+                        mRect.left = paintingOffset;
+                        mRect.right = paintingOffset + width;
+                        drawColor(canvas, span.underlineColor, mRect);
+                    }
+
+                    // Draw issue curly underline
+                    if (span.problemFlags > 0 && Integer.highestOneBit(span.problemFlags) != Span.FLAG_DEPRECATED) {
+                        int color = 0;
+                        switch (Integer.highestOneBit(span.problemFlags)) {
+                            case Span.FLAG_ERROR:
+                                color = mColors.getColor(EditorColorScheme.PROBLEM_ERROR);
+                                break;
+                            case Span.FLAG_WARNING:
+                                color = mColors.getColor(EditorColorScheme.PROBLEM_WARNING);
+                                break;
+                            case Span.FLAG_TYPO:
+                                color = mColors.getColor(EditorColorScheme.PROBLEM_TYPO);
+                                break;
+                        }
+                        if (color != 0 && span.column >= 0 && spanEnd - span.column >= 0) {
+                            // Start and end X offset
+                            float startOffset;
+                            float lineWidth;
+                            if (isWordwrap()) {
+                                startOffset = measureTextRegionOffset() + measureText(mBuffer, firstVisibleChar, Math.max(0, span.column - firstVisibleChar), line) - getOffsetX();
+                                lineWidth = measureText(mBuffer, Math.max(firstVisibleChar, span.column), spanEnd - Math.max(firstVisibleChar, span.column), line) + phi;
+                            } else {
+                                startOffset = measureTextRegionOffset() + measureText(mBuffer, 0, span.column, line) - getOffsetX();
+                                lineWidth = measureText(mBuffer, span.column, spanEnd - span.column, line) + phi;
+                            }
+                            float centerY = getRowBottom(row) - getOffsetY();
+                            // Clip region due not to draw outside the horizontal region
+                            canvas.save();
+                            canvas.clipRect(startOffset, 0, startOffset + lineWidth, canvas.getHeight());
+                            canvas.translate(startOffset - phi, centerY);
+                            // Draw waves
+                            mPath.reset();
+                            mPath.moveTo(0, 0);
+                            int waveCount = (int) Math.ceil(lineWidth / waveLength);
+                            for (int i = 0; i < waveCount; i++) {
+                                mPath.quadTo(waveLength * i + waveLength / 4, amplitude, waveLength * i + waveLength / 2, 0);
+                                mPath.quadTo(waveLength * i + waveLength * 3 / 4, -amplitude, waveLength * i + waveLength, 0);
+                            }
+                            phi = waveLength - (waveCount * waveLength - lineWidth);
+                            // Draw path
+                            mPaint.setStrokeWidth(getDpUnit() * 1.8f);
+                            mPaintOther.setStyle(Paint.Style.STROKE);
+                            mPaintOther.setColor(color);
+                            canvas.drawPath(mPath, mPaintOther);
+                            canvas.restore();
+                        }
+                        mPaintOther.setStyle(Paint.Style.FILL);
+                    } else {
+                        phi = 0f;
+                    }
+
+                    // Invoke external renderer postDraw
+                    if (renderer != null && renderer.requirePostDraw()) {
+                        int saveCount = canvas.save();
+                        canvas.translate(paintingOffset, getRowTop(row) - getOffsetY());
+                        canvas.clipRect(0f, 0f, width, getRowHeight());
+                        try {
+                            renderer.draw(canvas, mPaint, mColors, false);
+                        } catch (Exception e) {
+                            Log.e(LOG_TAG, "Error while invoking external renderer", e);
+                        }
+                        canvas.restoreToCount(saveCount);
+                    }
+
+                    paintingOffset += width;
+
+                    if (paintEnd == lastVisibleChar) {
+                        break;
+                    }
+                    spanOffset++;
+                    if (spanOffset < reader.getSpanCount()) {
+                        span = reader.getSpanAt(spanOffset);
+                    } else {
+                        spanOffset--;
+                    }
+                }
+                try {
+                    reader.moveToLine(-1);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            } else {
+                paintingOffset = offset + mRenderer.drawLineHardwareAccelerated(canvas, line, offset) - mDpUnit * 20;
+                lastVisibleChar = columnCount;
+            }
+
+            // Draw hard wrap
+            if (lastVisibleChar == columnCount && (mNonPrintableOptions & FLAG_DRAW_LINE_SEPARATOR) != 0) {
+                drawMiniGraph(canvas, paintingOffset, row, "↵");
+            }
+
+            // Recover the offset
+            paintingOffset = backupOffset;
+
+            // Draw non-printable characters
+            if (circleRadius != 0f && (leadingWhitespaceEnd != columnCount || (mNonPrintableOptions & FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE) != 0)) {
+                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_LEADING) != 0) {
+                    drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, 0, leadingWhitespaceEnd, circleRadius);
+                }
+                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_INNER) != 0) {
+                    drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, leadingWhitespaceEnd, trailingWhitespaceStart, circleRadius);
+                }
+                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_TRAILING) != 0) {
+                    drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, trailingWhitespaceStart, columnCount, circleRadius);
+                }
+                if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_IN_SELECTION) != 0 && mCursor.isSelected() && line >= mCursor.getLeftLine() && line <= mCursor.getRightLine()) {
+                    int selectionStart = 0;
+                    int selectionEnd = columnCount;
+                    if (line == mCursor.getLeftLine()) {
+                        selectionStart = mCursor.getLeftColumn();
+                    }
+                    if (line == mCursor.getRightLine()) {
+                        selectionEnd = mCursor.getRightColumn();
+                    }
+                    if ((mNonPrintableOptions & 0b1110) == 0) {
+                        drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, selectionStart, selectionEnd, circleRadius);
+                    } else {
+                        if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_LEADING) == 0) {
+                            drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, selectionStart, Math.min(leadingWhitespaceEnd, selectionEnd), circleRadius);
+                        }
+                        if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_INNER) == 0) {
+                            drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, Math.max(leadingWhitespaceEnd, selectionStart), Math.min(trailingWhitespaceStart, selectionEnd), circleRadius);
+                        }
+                        if ((mNonPrintableOptions & FLAG_DRAW_WHITESPACE_TRAILING) == 0) {
+                            drawWhitespaces(canvas, paintingOffset, line, row, firstVisibleChar, lastVisibleChar, Math.max(trailingWhitespaceStart, selectionStart), selectionEnd, circleRadius);
+                        }
+                    }
+                }
+            }
+
+            // Draw composing text underline
+            if (line == mConnection.mComposingLine) {
+                int composingStart = mConnection.mComposingStart;
+                int composingEnd = mConnection.mComposingEnd;
+                int paintStart = Math.min(Math.max(composingStart, firstVisibleChar), lastVisibleChar);
+                int paintEnd = Math.min(Math.max(composingEnd, firstVisibleChar), lastVisibleChar);
+                if (paintStart != paintEnd) {
+                    mRect.top = getRowBottom(row) - getOffsetY();
+                    mRect.bottom = mRect.top + getRowHeight() * 0.06f;
+                    mRect.left = paintingOffset + measureText(mBuffer, firstVisibleChar, paintStart - firstVisibleChar, line);
+                    mRect.right = mRect.left + measureText(mBuffer, paintStart, paintEnd - paintStart, line);
+                    drawColor(canvas, mColors.getColor(EditorColorScheme.UNDERLINE), mRect);
+                }
+            }
+
+            // Draw cursors
+            if (mCursor.isSelected()) {
+                if (mCursor.getLeftLine() == line && isInside(mCursor.getLeftColumn(), firstVisibleChar, lastVisibleChar, line)) {
+                    float centerX = paintingOffset + measureText(mBuffer, firstVisibleChar, mCursor.getLeftColumn() - firstVisibleChar, line);
+                    postDrawCursor.add(new DrawCursorTask(centerX, getRowBottom(row) - getOffsetY(), SelectionHandleStyle.HANDLE_TYPE_LEFT, mLeftHandle));
+                }
+                if (mCursor.getRightLine() == line && isInside(mCursor.getRightColumn(), firstVisibleChar, lastVisibleChar, line)) {
+                    float centerX = paintingOffset + measureText(mBuffer, firstVisibleChar, mCursor.getRightColumn() - firstVisibleChar, line);
+                    postDrawCursor.add(new DrawCursorTask(centerX, getRowBottom(row) - getOffsetY(), SelectionHandleStyle.HANDLE_TYPE_RIGHT, mRightHandle));
+                }
+            } else if (mCursor.getLeftLine() == line && isInside(mCursor.getLeftColumn(), firstVisibleChar, lastVisibleChar, line)) {
+                float centerX = paintingOffset + measureText(mBuffer, firstVisibleChar, mCursor.getLeftColumn() - firstVisibleChar, line);
+                postDrawCursor.add(new DrawCursorTask(centerX, getRowBottom(row) - getOffsetY(), mEventHandler.shouldDrawInsertHandle() ? SelectionHandleStyle.HANDLE_TYPE_INSERT : SelectionHandleStyle.HANDLE_TYPE_UNDEFINED, mInsertHandle));
+            }
+        }
+
+        mPaint.setFakeBoldText(false);
+        mPaint.setTextSkewX(0);
+        mPaintOther.setStrokeWidth(circleRadius * 2);
+        mDrawPoints.commitPoints(canvas, mPaintOther);
+    }
+
+    /**
+     * Draw small characters as graph
+     */
+    protected void drawMiniGraph(Canvas canvas, float offset, int row, String graph) {
+        // Draw
+        mPaintGraph.setColor(mColors.getColor(EditorColorScheme.NON_PRINTABLE_CHAR));
+        float baseline = getRowBottom(row) - getOffsetY() - mGraphMetrics.descent;
+        canvas.drawText(graph, 0, graph.length(), offset, baseline, mPaintGraph);
+    }
+
+    /**
+     * Draw non-printable characters
+     */
+    protected void drawWhitespaces(Canvas canvas, float offset, int line, int row, int rowStart, int rowEnd, int min, int max, float circleRadius) {
+        int paintStart = Math.max(rowStart, Math.min(rowEnd, min));
+        int paintEnd = Math.max(rowStart, Math.min(rowEnd, max));
+        mPaintOther.setColor(mColors.getColor(EditorColorScheme.NON_PRINTABLE_CHAR));
+
+        if (paintStart < paintEnd) {
+            float spaceWidth = mPaint.getSpaceWidth();
+            float rowCenter = (getRowTop(row) + getRowBottom(row)) / 2f - getOffsetY();
+            offset += measureText(mBuffer, rowStart, paintStart - rowStart, line);
+            var chars = mBuffer.value;
+            var lastPos = paintStart;
+            while (paintStart < paintEnd) {
+                char ch = chars[paintStart];
+                int paintCount = 0;
+                boolean paintLine = false;
+                if (ch == ' ' || ch == '\t') {
+                    offset += measureText(mBuffer, lastPos, paintStart - lastPos, line);
+                }
+                if (ch == ' ') {
+                    paintCount = 1;
+                } else if (ch == '\t') {
+                    if ((getNonPrintableFlags() & FLAG_DRAW_TAB_SAME_AS_SPACE) != 0) {
+                        paintCount = getTabWidth();
+                    } else {
+                        paintLine = true;
+                    }
+                }
+                for (int i = 0; i < paintCount; i++) {
+                    float charStartOffset = offset + spaceWidth * i;
+                    float charEndOffset = charStartOffset + spaceWidth;
+                    float centerOffset = (charStartOffset + charEndOffset) / 2f;
+                    mDrawPoints.drawPoint(centerOffset, rowCenter);
+                }
+                if (paintLine) {
+                    var charWidth = getTabWidth() * spaceWidth;
+                    float delta = charWidth * 0.05f;
+                    canvas.drawLine(offset + delta, rowCenter, offset + charWidth - delta, rowCenter, mPaintOther);
+                }
+
+                if (ch == ' ' || ch == '\t') {
+                    offset += (ch == ' ' ? spaceWidth : spaceWidth * getTabWidth());
+                    lastPos = paintStart + 1;
+                }
+                paintStart++;
+            }
+        }
+    }
+
+    /**
+     * As the name is, we find where leading spaces end and trailing spaces start
+     * Before calling this, the line should be prepared
+     *
+     * @param line The line to search
+     */
+    protected long findLeadingAndTrailingWhitespacePos(int line) {
+        var buffer = mText.getLine(line).value;
+        int column = mText.getColumnCount(line);
+        int leading = 0;
+        int trailing = column;
+        while (leading < column && isWhitespace(buffer[leading])) {
+            leading++;
+        }
+        // Only them this action is needed
+        if (leading != column && (mNonPrintableOptions & (FLAG_DRAW_WHITESPACE_INNER | FLAG_DRAW_WHITESPACE_TRAILING)) != 0) {
+            while (trailing > 0 && isWhitespace(buffer[trailing - 1])) {
+                trailing--;
+            }
+        }
+        return IntPair.pack(leading, trailing);
+    }
+
+    /**
+     * A quick method to predicate whitespace character
+     */
+    private boolean isWhitespace(char ch) {
+        return ch == '\t' || ch == ' ';
+    }
+
+    /**
+     * Get matched text regions on the given line
+     *
+     * @param line      Target line
+     * @param positions Outputs start positions
+     */
+    protected void computeMatchedPositions(int line, List<Integer> positions) {
+        positions.clear();
+        CharSequence pattern = mSearcher.mSearchText;
+        if (pattern == null || pattern.length() == 0) {
+            return;
+        }
+        ContentLine seq = mText.getLine(line);
+        int index = 0;
+        while (index != -1) {
+            index = seq.indexOf(pattern, index);
+            if (index != -1) {
+                positions.add(index);
+                index += pattern.length();
+            }
+        }
+    }
+
+    /**
+     * Is inside the region
+     *
+     * @param index Index to test
+     * @param start Start of region
+     * @param end   End of region
+     * @param line  Checking line
+     * @return true if cursor should be drawn in this row
+     */
+    private boolean isInside(int index, int start, int end, int line) {
+        // Due not to draw duplicate cursors for a single one
+        if (index == end && mText.getLine(line).length() != end) {
+            return false;
+        }
+        return index >= start && index <= end;
+    }
+
+    /**
+     * Draw background of a text region
+     *
+     * @param canvas         Canvas to draw
+     * @param paintingOffset Paint offset x on canvas
+     * @param row            The row index
+     * @param firstVis       First visible character
+     * @param lastVis        Last visible character
+     * @param highlightStart Region start
+     * @param highlightEnd   Region end
+     * @param color          Color of background
+     */
+    protected void drawRowRegionBackground(Canvas canvas, float paintingOffset, int row, int firstVis, int lastVis, int highlightStart, int highlightEnd, int color, int line) {
+        int paintStart = Math.min(Math.max(firstVis, highlightStart), lastVis);
+        int paintEnd = Math.min(Math.max(firstVis, highlightEnd), lastVis);
+        if (paintStart != paintEnd) {
+            mRect.top = getRowTop(row) - getOffsetY();
+            mRect.bottom = getRowBottom(row) - getOffsetY();
+            mRect.left = paintingOffset + measureText(mBuffer, firstVis, paintStart - firstVis, line);
+            mRect.right = mRect.left + measureText(mBuffer, paintStart, paintEnd - paintStart, line);
+            mPaint.setColor(color);
+            canvas.drawRoundRect(mRect, getRowHeight() * 0.13f, getRowHeight() * 0.13f, mPaint);
+        }
+    }
+
+    /**
+     * Draw text region with highlighting selected text
+     *
+     * @param canvas      Canvas to draw
+     * @param offsetX     Start paint offset x on canvas
+     * @param baseline    Baseline on canvas
+     * @param line        Drawing line index
+     * @param startIndex  Start index to paint
+     * @param endIndex    Index of end character to paint
+     * @param columnCount Column count of line
+     * @param color       Color of normal text in this region
+     */
+    protected void drawRegionText(Canvas canvas, float offsetX, float baseline, int line, int startIndex, int endIndex, int contextStart, int contextEnd, int columnCount, int color) {
+        boolean hasSelectionOnLine = mCursor.isSelected() && line >= mCursor.getLeftLine() && line <= mCursor.getRightLine();
+        int selectionStart = 0;
+        int selectionEnd = columnCount;
+        int contextCount = contextEnd - contextStart;
+        if (line == mCursor.getLeftLine()) {
+            selectionStart = mCursor.getLeftColumn();
+        }
+        if (line == mCursor.getRightLine()) {
+            selectionEnd = mCursor.getRightColumn();
+        }
+        mPaint.setColor(color);
+        if (hasSelectionOnLine && mColors.getColor(EditorColorScheme.TEXT_SELECTED) != 0) {
+            if (endIndex <= selectionStart || startIndex >= selectionEnd) {
+                drawText(canvas, mBuffer, startIndex, endIndex - startIndex, contextStart, contextCount, offsetX, baseline, line);
+            } else {
+                if (startIndex <= selectionStart) {
+                    if (endIndex >= selectionEnd) {
+                        //Three regions
+                        //startIndex - selectionStart
+                        drawText(canvas, mBuffer, startIndex, selectionStart - startIndex, contextStart, contextCount, offsetX, baseline, line);
+                        float deltaX = measureText(mBuffer, startIndex, selectionStart - startIndex, line);
+                        //selectionStart - selectionEnd
+                        mPaint.setColor(mColors.getColor(EditorColorScheme.TEXT_SELECTED));
+                        drawText(canvas, mBuffer, selectionStart, selectionEnd - selectionStart, contextStart, contextCount, offsetX + deltaX, baseline, line);
+                        deltaX += measureText(mBuffer, selectionStart, selectionEnd - selectionStart, line);
+                        //selectionEnd - endIndex
+                        mPaint.setColor(color);
+                        drawText(canvas, mBuffer, selectionEnd, endIndex - selectionEnd, contextStart, contextCount, offsetX + deltaX, baseline, line);
+                    } else {
+                        //Two regions
+                        //startIndex - selectionStart
+                        drawText(canvas, mBuffer, startIndex, selectionStart - startIndex, contextStart, contextCount, offsetX, baseline, line);
+                        //selectionStart - endIndex
+                        mPaint.setColor(mColors.getColor(EditorColorScheme.TEXT_SELECTED));
+                        drawText(canvas, mBuffer, selectionStart, endIndex - selectionStart, contextStart, contextCount, offsetX + measureText(mBuffer, startIndex, selectionStart - startIndex, line), baseline, line);
+                    }
+                } else {
+                    //selectionEnd > startIndex > selectionStart
+                    if (endIndex > selectionEnd) {
+                        //Two regions
+                        //selectionEnd - endIndex
+                        drawText(canvas, mBuffer, selectionEnd, endIndex - selectionEnd, contextStart, contextCount, offsetX + measureText(mBuffer, startIndex, selectionEnd - startIndex, line), baseline, line);
+                        //startIndex - selectionEnd
+                        mPaint.setColor(mColors.getColor(EditorColorScheme.TEXT_SELECTED));
+                        drawText(canvas, mBuffer, startIndex, selectionEnd - startIndex, contextStart, contextCount, offsetX, baseline, line);
+                    } else {
+                        //One region
+                        mPaint.setColor(mColors.getColor(EditorColorScheme.TEXT_SELECTED));
+                        drawText(canvas, mBuffer, startIndex, endIndex - startIndex, contextStart, contextCount, offsetX, baseline, line);
+                    }
+                }
+            }
+        } else {
+            drawText(canvas, mBuffer, startIndex, endIndex - startIndex, contextStart, contextCount, offsetX, baseline, line);
+        }
+    }
+
+    /**
+     * Draw effect of edges
+     *
+     * @param canvas The canvas to draw
+     */
+    protected void drawEdgeEffect(Canvas canvas) {
+        boolean postDraw = false;
+        if (!mVerticalEdgeGlow.isFinished()) {
+            boolean bottom = mEventHandler.topOrBottom;
+            if (bottom) {
+                canvas.save();
+                canvas.translate(-getMeasuredWidth(), getMeasuredHeight());
+                canvas.rotate(180, getMeasuredWidth(), 0);
+            }
+            postDraw = mVerticalEdgeGlow.draw(canvas);
+            if (bottom) {
+                canvas.restore();
+            }
+        }
+        if (isWordwrap()) {
+            mHorizontalGlow.finish();
+        }
+        if (!mHorizontalGlow.isFinished()) {
+            canvas.save();
+            boolean right = mEventHandler.leftOrRight;
+            if (right) {
+                canvas.rotate(90);
+                canvas.translate(0, -getMeasuredWidth());
+            } else {
+                canvas.translate(0, getMeasuredHeight());
+                canvas.rotate(-90);
+            }
+            postDraw = mHorizontalGlow.draw(canvas) || postDraw;
+            canvas.restore();
+        }
+        OverScroller scroller = getScroller();
+        if (scroller.isOverScrolled()) {
+            if (mVerticalEdgeGlow.isFinished() && (scroller.getCurrY() < 0 || scroller.getCurrY() > getScrollMaxY())) {
+                mEventHandler.topOrBottom = scroller.getCurrY() >= getScrollMaxY();
+                mVerticalEdgeGlow.onAbsorb((int) scroller.getCurrVelocity());
+                postDraw = true;
+            }
+            if (mHorizontalGlow.isFinished() && (scroller.getCurrX() < 0 || scroller.getCurrX() > getScrollMaxX())) {
+                mEventHandler.leftOrRight = scroller.getCurrX() >= getScrollMaxX();
+                mHorizontalGlow.onAbsorb((int) scroller.getCurrVelocity());
+                postDraw = true;
+            }
+        }
+        if (postDraw) {
+            postInvalidate();
+        }
+    }
+
+    /**
+     * Draw code block lines on screen
+     *
+     * @param canvas  The canvas to draw
+     * @param offsetX The start x offset for text
+     */
+    protected void drawBlockLines(Canvas canvas, float offsetX) {
+        List<CodeBlock> blocks = mStyles == null ? null : mStyles.blocks;
+        if (blocks == null || blocks.isEmpty()) {
+            return;
+        }
+        int first = getFirstVisibleRow();
+        int last = getLastVisibleRow();
+        boolean mark = false;
+        int invalidCount = 0;
+        int maxCount = Integer.MAX_VALUE;
+        if (mStyles != null) {
+            maxCount = mStyles.getSuppressSwitch();
+        }
+        int mm = binarySearchEndBlock(first, blocks);
+        int cursorIdx = mCursorPosition;
+        for (int curr = mm; curr < blocks.size(); curr++) {
+            CodeBlock block = blocks.get(curr);
+            if (hasVisibleRegion(block.startLine, block.endLine, first, last)) {
+                try {
+                    var lineContent = mText.getLine(block.endLine);
+                    float offset1 = measureText(lineContent, 0, Math.min(block.endColumn, lineContent.length()), block.endLine);
+                    lineContent = mText.getLine(block.startLine);
+                    float offset2 = measureText(lineContent, 0, Math.min(block.startColumn, lineContent.length()), block.startLine);
+                    float offset = Math.min(offset1, offset2);
+                    float centerX = offset + offsetX;
+                    mRect.top = Math.max(0, getRowBottom(block.startLine) - getOffsetY());
+                    mRect.bottom = Math.min(getHeight(), (block.toBottomOfEndLine ? getRowBottom(block.endLine) : getRowTop(block.endLine)) - getOffsetY());
+                    mRect.left = centerX - mDpUnit * mBlockLineWidth / 2;
+                    mRect.right = centerX + mDpUnit * mBlockLineWidth / 2;
+                    drawColor(canvas, mColors.getColor(curr == cursorIdx ? EditorColorScheme.BLOCK_LINE_CURRENT : EditorColorScheme.BLOCK_LINE), mRect);
+                } catch (IndexOutOfBoundsException e) {
+                    //Ignored
+                    //Because the exception usually occurs when the content changed.
+                }
+                mark = true;
+            } else if (mark) {
+                if (invalidCount >= maxCount)
+                    break;
+                invalidCount++;
+            }
+        }
+    }
+
+    /**
+     * Draw scroll bars and tracks
+     *
+     * @param canvas The canvas to draw
+     */
+    protected void drawScrollBars(Canvas canvas) {
+        mVerticalScrollBar.setEmpty();
+        mHorizontalScrollBar.setEmpty();
+        if (!mEventHandler.shouldDrawScrollBar()) {
+            return;
+        }
+        if (isVerticalScrollBarEnabled() && getScrollMaxY() > getHeight() / 2) {
+            drawScrollBarTrackVertical(canvas);
+            drawScrollBarVertical(canvas);
+        }
+        if (isHorizontalScrollBarEnabled() && !isWordwrap() && getScrollMaxX() > getWidth() * 3 / 4) {
+            drawScrollBarTrackHorizontal(canvas);
+            drawScrollBarHorizontal(canvas);
+        }
+    }
+
+    /**
+     * Draw vertical scroll bar track
+     *
+     * @param canvas Canvas to draw
+     */
+    protected void drawScrollBarTrackVertical(Canvas canvas) {
+        if (mEventHandler.holdVerticalScrollBar()) {
+            mRect.right = getWidth();
+            mRect.left = getWidth() - mDpUnit * 10;
+            mRect.top = 0;
+            mRect.bottom = getHeight();
+            drawColor(canvas, mColors.getColor(EditorColorScheme.SCROLL_BAR_TRACK), mRect);
+        }
+    }
+
+    /**
+     * Draw vertical scroll bar
+     *
+     * @param canvas Canvas to draw
+     */
+    protected void drawScrollBarVertical(Canvas canvas) {
+        int page = getHeight();
+        float all = mLayout.getLayoutHeight() + getHeight() / 2f;
+        float length = page / all * getHeight();
+        float topY;
+        if (length < mDpUnit * 30) {
+            length = mDpUnit * 30;
+            topY = (getOffsetY() + page / 2f) / all * (getHeight() - length);
+        } else {
+            topY = getOffsetY() / all * getHeight();
+        }
+        if (mEventHandler.holdVerticalScrollBar()) {
+            float centerY = topY + length / 2f;
+            drawLineInfoPanel(canvas, centerY, mRect.left - mDpUnit * 5);
+        }
+        mRect.right = getWidth();
+        mRect.left = getWidth() - mDpUnit * 10;
+        mRect.top = topY;
+        mRect.bottom = topY + length;
+        mVerticalScrollBar.set(mRect);
+        drawColor(canvas, mColors.getColor(mEventHandler.holdVerticalScrollBar() ? EditorColorScheme.SCROLL_BAR_THUMB_PRESSED : EditorColorScheme.SCROLL_BAR_THUMB), mRect);
+    }
+
+    /**
+     * Draw line number panel
+     *
+     * @param canvas  Canvas to draw
+     * @param centerY The center y on screen for the panel
+     * @param rightX  The right x on screen for the panel
+     */
+    protected void drawLineInfoPanel(Canvas canvas, float centerY, float rightX) {
+        if (!mDisplayLnPanel) {
+            return;
+        }
+        String text = mLnTip + (1 + getFirstVisibleLine());
+        float backupSize = mPaint.getTextSize();
+        mPaint.setTextSize(getLineInfoTextSize());
+        Paint.FontMetricsInt backupMetrics = mTextMetrics;
+        mTextMetrics = mPaint.getFontMetricsInt();
+        float expand = mDpUnit * 3;
+        float textWidth = mPaint.measureText(text);
+        mRect.top = centerY - getRowHeight() / 2f - expand;
+        mRect.bottom = centerY + getRowHeight() / 2f + expand;
+        mRect.right = rightX;
+        mRect.left = rightX - expand * 2 - textWidth;
+        drawColor(canvas, mColors.getColor(EditorColorScheme.LINE_NUMBER_PANEL), mRect);
+        float baseline = centerY - getRowHeight() / 2f + getRowBaseline(0);
+        float centerX = (mRect.left + mRect.right) / 2;
+        mPaint.setColor(mColors.getColor(EditorColorScheme.LINE_NUMBER_PANEL_TEXT));
+        mPaint.setTextAlign(Paint.Align.CENTER);
+        canvas.drawText(text, centerX, baseline, mPaint);
+        mPaint.setTextAlign(Paint.Align.LEFT);
+        mPaint.setTextSize(backupSize);
+        mTextMetrics = backupMetrics;
+    }
+
+    /**
+     * Draw horizontal scroll bar track
+     *
+     * @param canvas Canvas to draw
+     */
+    protected void drawScrollBarTrackHorizontal(Canvas canvas) {
+        if (mEventHandler.holdHorizontalScrollBar()) {
+            mRect.top = getHeight() - mDpUnit * 10;
+            mRect.bottom = getHeight();
+            mRect.right = getWidth();
+            mRect.left = 0;
+            drawColor(canvas, mColors.getColor(EditorColorScheme.SCROLL_BAR_TRACK), mRect);
+        }
+    }
+
+    /**
+     * Draw horizontal scroll bar
+     *
+     * @param canvas Canvas to draw
+     */
+    protected void drawScrollBarHorizontal(Canvas canvas) {
+        int page = getWidth();
+        float all = getScrollMaxX();
+        float length = page / (all + getWidth()) * getWidth();
+        float leftX = getOffsetX() / all * (getWidth() - length);
+        mRect.top = getHeight() - mDpUnit * 10;
+        mRect.bottom = getHeight();
+        mRect.right = leftX + length;
+        mRect.left = leftX;
+        mHorizontalScrollBar.set(mRect);
+        drawColor(canvas, mColors.getColor(mEventHandler.holdHorizontalScrollBar() ? EditorColorScheme.SCROLL_BAR_THUMB_PRESSED : EditorColorScheme.SCROLL_BAR_THUMB), mRect);
+    }
+
+    protected void drawSelectionOnAnimation(Canvas canvas) {
+        mRect.bottom = (float) mCursorAnimator.animatorY.getAnimatedValue() - getOffsetY();
+        mRect.top = mRect.bottom - getRowHeight();
+        float centerX = (float) mCursorAnimator.animatorX.getAnimatedValue() - getOffsetX();
+        mRect.left = centerX - mInsertSelWidth / 2;
+        mRect.right = centerX + mInsertSelWidth / 2;
+        drawColor(canvas, mColors.getColor(EditorColorScheme.SELECTION_INSERT), mRect);
+        if (mEventHandler.shouldDrawInsertHandle()) {
+            mHandleStyle.draw(canvas, SelectionHandleStyle.HANDLE_TYPE_INSERT, centerX, mRect.bottom, getRowHeight(), mColors.getColor(EditorColorScheme.SELECTION_HANDLE), mInsertHandle);
+        }
+    }
+
+
+    /**
+     * Get the color of EdgeEffect
+     *
+     * @return The color of EdgeEffect.
+     */
+    public int getEdgeEffectColor() {
+        return mVerticalEdgeGlow.getColor();
+    }
+
+    /**
+     * Set the color of EdgeEffect
+     *
+     * @param color The color of EdgeEffect
+     */
+    public void setEdgeEffectColor(int color) {
+        mVerticalEdgeGlow.setColor(color);
+        mHorizontalGlow.setColor(color);
+    }
+
+    /**
+     * Get EdgeEffect for vertical direction
+     *
+     * @return EdgeEffect
+     */
+    protected MaterialEdgeEffect getVerticalEdgeEffect() {
+        return mVerticalEdgeGlow;
+    }
+
+    /**
+     * Get EdgeEffect for horizontal direction
+     *
+     * @return EdgeEffect
+     */
+    protected MaterialEdgeEffect getHorizontalEdgeEffect() {
+        return mHorizontalGlow;
+    }
+
+    /**
+     * Find the smallest code block that cursor is in
+     *
+     * @return The smallest code block index.
+     * If cursor is not in any code block,just -1.
+     */
+    private int findCursorBlock() {
+        List<CodeBlock> blocks = mStyles == null ? null : mStyles.blocks;
+        if (blocks == null || blocks.isEmpty()) {
+            return -1;
+        }
+        return findCursorBlock(blocks);
+    }
+
+    /**
+     * Find the cursor code block internal
+     *
+     * @param blocks Current code blocks
+     * @return The smallest code block index.
+     * If cursor is not in any code block,just -1.
+     */
+    private int findCursorBlock(List<CodeBlock> blocks) {
+        int line = mCursor.getLeftLine();
+        int min = binarySearchEndBlock(line, blocks);
+        int max = blocks.size() - 1;
+        int minDis = Integer.MAX_VALUE;
+        int found = -1;
+        int invalidCount = 0;
+        int maxCount = Integer.MAX_VALUE;
+        if (mStyles != null) {
+            maxCount = mStyles.getSuppressSwitch();
+        }
+        for (int i = min; i <= max; i++) {
+            CodeBlock block = blocks.get(i);
+            if (block.endLine >= line && block.startLine <= line) {
+                int dis = block.endLine - block.startLine;
+                if (dis < minDis) {
+                    minDis = dis;
+                    found = i;
+                }
+            } else if (minDis != Integer.MAX_VALUE) {
+                invalidCount++;
+                if (invalidCount >= maxCount) {
+                    break;
+                }
+            }
+        }
+        return found;
+    }
+
+    /**
+     * Find the first code block that maybe seen on screen
+     * Because the code blocks is sorted by its end line position
+     * we can use binary search to quicken this process in order to decrease
+     * the time we use on finding
+     *
+     * @param firstVis The first visible line
+     * @param blocks   Current code blocks
+     * @return The block we found. It is always a valid index(Unless there is no block)
+     */
+    private int binarySearchEndBlock(int firstVis, List<CodeBlock> blocks) {
+        //end > firstVis
+        int left = 0, right = blocks.size() - 1, mid, row;
+        int max = right;
+        while (left <= right) {
+            mid = (left + right) / 2;
+            if (mid < 0) return 0;
+            if (mid > max) return max;
+            row = blocks.get(mid).endLine;
+            if (row > firstVis) {
+                right = mid - 1;
+            } else if (row < firstVis) {
+                left = mid + 1;
+            } else {
+                left = mid;
+                break;
+            }
+        }
+        return Math.max(0, Math.min(left, max));
+    }
+
+    /**
+     * Measure text width with editor's text paint
+     *
+     * @param text  Source string
+     * @param index Start index in array
+     * @param count Count of characters
+     * @return The width measured
+     */
+    @UnsupportedUserUsage
+    public float measureText(ContentLine text, int index, int count, int line) {
+        var gtr = GraphicTextRow.obtain();
+        gtr.set(text, 0, text.length(), mTabWidth, getSpansForLine(line), mPaint);
+        var res = gtr.measureText(index, index + count);
+        GraphicTextRow.recycle(gtr);
+        return res;
+    }
+
+    /**
+     * Get spans on the given line
+     */
+    public List<Span> getSpansForLine(int line) {
+        var spanMap = mStyles == null ? null : mStyles.spans;
+        if (defSpans.size() == 0) {
+            defSpans.add(Span.obtain(0, EditorColorScheme.TEXT_NORMAL));
+        }
+        try {
+            if (spanMap != null) {
+                return spanMap.read().getSpansOnLine(line);
+            } else {
+                return defSpans;
+            }
+        } catch (Exception e) {
+            return defSpans;
+        }
+    }
+
+    /**
+     * Draw text on the given position
+     *
+     * @param canvas Canvas to draw
+     * @param line   Source of characters
+     * @param index  The index in array
+     * @param count  Count of characters
+     * @param offX   Offset x for paint
+     * @param offY   Offset y for paint(baseline)
+     */
+    @SuppressLint("NewApi")
+    protected void drawText(Canvas canvas, ContentLine line, int index, int count, int contextStart, int contextCount, float offX, float offY, int lineNumber) {
+        // drawTextRun() can be called directly on low API systems
+        int end = index + count;
+        var src = line.value;
+        int st = index;
+        for (int i = index; i < end; i++) {
+            if (src[i] == '\t') {
+                canvas.drawTextRun(src, st, i - st, contextStart, contextCount, offX, offY, false, mPaint);
+                offX = offX + measureText(line, st, i - st + 1, lineNumber);
+                st = i + 1;
+            }
+        }
+        if (st < end) {
+            canvas.drawTextRun(src, st, end - st, contextStart, contextCount, offX, offY, false, mPaint);
+        }
+    }
+
+    @UnsupportedUserUsage
+    public float[] findFirstVisibleChar(float target, int start, int end, ContentLine line, int lineNumber) {
+        return findFirstVisibleChar(target, start, end, start, line, lineNumber);
+    }
+
+    /**
+     * Find first visible character
+     */
+    @UnsupportedUserUsage
+    public float[] findFirstVisibleChar(float target, int start, int end, int contextStart, ContentLine line, int lineNumber) {
+        if (start >= end) {
+            return new float[]{end, 0};
+        }
+        var gtr = GraphicTextRow.obtain();
+        gtr.set(line, contextStart, end, mTabWidth, getSpansForLine(lineNumber), mPaint);
+        if (line.widthCache != null && line.timestamp < mTimestamp) {
+            buildMeasureCacheForLines(lineNumber, lineNumber, mTimestamp);
+        }
+        var res = gtr.findOffsetByAdvance(start, target);
+        GraphicTextRow.recycle(gtr);
+        return res;
+    }
+
+    /**
+     * Switch current drawing context to the given line
+     *
+     * @param line Line going to draw or measure
+     */
+    protected void prepareLine(int line) {
+        mBuffer = mText.getLine(line);
+    }
+
+    /**
+     * Draw background for whole row
+     */
+    protected void drawRowBackground(Canvas canvas, int color, int row) {
+        drawRowBackground(canvas, color, row, mViewRect.right);
+    }
+
+    protected void drawRowBackground(Canvas canvas, int color, int row, int right) {
+        mRect.top = getRowTop(row) - getOffsetY();
+        mRect.bottom = getRowBottom(row) - getOffsetY();
+        mRect.left = 0;
+        mRect.right = right;
+        drawColor(canvas, color, mRect);
+    }
+
+    /**
+     * Draw single line number
+     */
+    protected void drawLineNumber(Canvas canvas, int line, int row, float offsetX, float width, int color) {
+        if (width + offsetX <= 0) {
+            return;
+        }
+        if (mPaintOther.getTextAlign() != mLineNumberAlign) {
+            mPaintOther.setTextAlign(mLineNumberAlign);
+        }
+        mPaintOther.setColor(color);
+        // Line number center align to text center
+        float y = (getRowBottom(row) + getRowTop(row)) / 2f - (mLineNumberMetrics.descent - mLineNumberMetrics.ascent) / 2f - mLineNumberMetrics.ascent - getOffsetY();
+
+        var buffer = TemporaryCharBuffer.obtain(20);
+        line++;
+        int i = stringSize(line);
+        Numbers.getChars(line, i, buffer);
+
+        switch (mLineNumberAlign) {
+            case LEFT:
+                canvas.drawText(buffer, 0, i, offsetX, y, mPaintOther);
+                break;
+            case RIGHT:
+                canvas.drawText(buffer, 0, i, offsetX + width, y, mPaintOther);
+                break;
+            case CENTER:
+                canvas.drawText(buffer, 0, i, offsetX + (width + mDividerMargin) / 2f, y, mPaintOther);
+        }
+        TemporaryCharBuffer.recycle(buffer);
+    }
+
+    /**
+     * Draw line number background
+     *
+     * @param canvas  Canvas to draw
+     * @param offsetX Start x of line number region
+     * @param width   Width of line number region
+     * @param color   Color of line number background
+     */
+    protected void drawLineNumberBackground(Canvas canvas, float offsetX, float width, int color) {
+        float right = offsetX + width;
+        if (right < 0) {
+            return;
+        }
+        float left = Math.max(0f, offsetX);
+        mRect.bottom = getHeight();
+        mRect.top = 0;
+        int offY = getOffsetY();
+        if (offY < 0) {
+            mRect.bottom = mRect.bottom - offY;
+            mRect.top = mRect.top - offY;
+        }
+        mRect.left = left;
+        mRect.right = right;
+        drawColor(canvas, color, mRect);
+    }
+
+    /**
+     * Draw divider line
+     *
+     * @param canvas  Canvas to draw
+     * @param offsetX End x of line number region
+     * @param color   Color to draw divider
+     */
+    protected void drawDivider(Canvas canvas, float offsetX, int color) {
+        boolean shadow = isLineNumberPinned() && !isWordwrap() && getOffsetX() > 0;
+        float right = offsetX + mDividerWidth;
+        if (right < 0) {
+            return;
+        }
+        float left = Math.max(0f, offsetX);
+        mRect.bottom = getHeight();
+        mRect.top = 0;
+        int offY = getOffsetY();
+        if (offY < 0) {
+            mRect.bottom = mRect.bottom - offY;
+            mRect.top = mRect.top - offY;
+        }
+        mRect.left = left;
+        mRect.right = right;
+        if (shadow) {
+            canvas.save();
+            canvas.clipRect(mRect.left, mRect.top, getWidth(), mRect.bottom);
+            mPaint.setShadowLayer(Math.min(mDpUnit * 8, getOffsetX()), 0, 0, Color.BLACK);
+        }
+        drawColor(canvas, color, mRect);
+        if (shadow) {
+            canvas.restore();
+            mPaint.setShadowLayer(0, 0, 0, 0);
+        }
+    }
+
+    /**
+     * Get the width of line number region
+     *
+     * @return width of line number region
+     */
+    protected float measureLineNumber() {
+        if (!isLineNumberEnabled()) {
+            return 0f;
+        }
+        int count = 0;
+        int lineCount = getLineCount();
+        while (lineCount > 0) {
+            count++;
+            lineCount /= 10;
+        }
+        var len = NUMBER_DIGITS.length();
+        var buffer = TemporaryFloatBuffer.obtain(len);
+        mPaintOther.getTextWidths(NUMBER_DIGITS, buffer);
+        TemporaryFloatBuffer.recycle(buffer);
+        float single = 0f;
+        for (int i = 0; i < len; i += 2) {
+            single = Math.max(single, buffer[i]);
+        }
+        return single * count;
+    }
+
+    /**
+     * Create layout for text
+     */
+    protected void createLayout() {
+        if (mLayout != null) {
+            mLayout.destroyLayout();
+        }
+        if (mWordwrap) {
+            mCachedLineNumberWidth = (int) measureLineNumber();
+            mLayout = new WordwrapLayout(this, mText);
+        } else {
+            mLayout = new LineBreakLayout(this, mText);
+        }
+        if (mEventHandler != null) {
+            mEventHandler.scrollBy(0, 0);
+        }
+    }
+
+    /**
+     * Draw rect on screen
+     * Will not do anything if color is zero
+     *
+     * @param canvas Canvas to draw
+     * @param color  Color of rect
+     * @param rect   Rect to draw
+     */
+    protected void drawColor(Canvas canvas, int color, RectF rect) {
+        if (color != 0) {
+            mPaint.setColor(color);
+            canvas.drawRect(rect, mPaint);
+        }
+    }
+
+    /**
+     * Draw rect on screen
+     * Will not do anything if color is zero
+     *
+     * @param canvas Canvas to draw
+     * @param color  Color of rect
+     * @param rect   Rect to draw
+     */
+    protected void drawColor(Canvas canvas, int color, Rect rect) {
+        if (color != 0) {
+            mPaint.setColor(color);
+            canvas.drawRect(rect, mPaint);
+        }
+    }
+
+    /**
+     * Commit a tab to cursor
+     */
+    private void commitTab() {
+        if (mConnection != null && isEditable()) {
+            mConnection.commitTextInternal("\t", true);
+        }
+    }
+
+    protected void updateCompletionWindowPosition() {
+        updateCompletionWindowPosition(true);
+    }
+
+    /**
+     * Apply new position of auto-completion window
+     */
+    protected void updateCompletionWindowPosition(boolean shift) {
+        float panelX = updateCursorAnchor() + mDpUnit * 20;
+        float[] rightLayoutOffset = mLayout.getCharLayoutOffset(mCursor.getRightLine(), mCursor.getRightColumn());
+        float panelY = rightLayoutOffset[0] - getOffsetY() + getRowHeight() / 2f;
+        float restY = getHeight() - panelY;
+        if (restY > mDpUnit * 200) {
+            restY = mDpUnit * 200;
+        } else if (restY < mDpUnit * 100 && shift) {
+            float offset = 0;
+            while (restY < mDpUnit * 100) {
+                restY += getRowHeight();
+                panelY -= getRowHeight();
+                offset += getRowHeight();
+            }
+            getScroller().startScroll(getOffsetX(), getOffsetY(), 0, (int) offset, 0);
+        }
+        int width;
+        if ((getWidth() < 500 * mDpUnit && mCompletionPosMode == WINDOW_POS_MODE_AUTO) || mCompletionPosMode == WINDOW_POS_MODE_FULL_WIDTH_ALWAYS) {
+            // center mode
+            width = getWidth() * 7 / 8;
+            panelX = getWidth() / 8f / 2f;
+        } else {
+            // follow cursor mode
+            width = (int) Math.min(300 * mDpUnit, getWidth() / 2f);
+        }
+        int height = mCompletionWindow.getHeight();
+        if (!mCompletionWindow.isShowing()) {
+            height = (int) restY;
+        }
+        mCompletionWindow.setMaxHeight((int) restY);
+        mCompletionWindow.setSize(width, height);
+        mCompletionWindow.setLocation((int) panelX + getOffsetX(), (int) panelY + getOffsetY());
+    }
+
+    /**
+     * Update the information of cursor
+     * Such as the position of cursor on screen(For input method that can go to any position on screen like PC input method)
+     *
+     * @return The offset x of right cursor on view
+     */
+    protected float updateCursorAnchor() {
+        CursorAnchorInfo.Builder builder = mAnchorInfoBuilder;
+        builder.reset();
+        mMatrix.set(getMatrix());
+        int[] b = new int[2];
+        getLocationOnScreen(b);
+        mMatrix.postTranslate(b[0], b[1]);
+        builder.setMatrix(mMatrix);
+        builder.setSelectionRange(mCursor.getLeft(), mCursor.getRight());
+        int l = mCursor.getRightLine();
+        int column = mCursor.getRightColumn();
+        prepareLine(l);
+        boolean visible = true;
+        float x = measureTextRegionOffset();
+        x = x + mLayout.getCharLayoutOffset(l, column)[1];
+        x = x - getOffsetX();
+        if (x < 0) {
+            visible = false;
+            x = 0;
+        }
+        builder.setInsertionMarkerLocation(x, getRowTop(l) - getOffsetY(), getRowBaseline(l) - getOffsetY(), getRowBottom(l) - getOffsetY(), visible ? CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION : CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION);
+        mInputMethodManager.updateCursorAnchorInfo(this, builder.build());
+        return x;
+    }
+
+    /**
+     * Delete text before cursor or selected text (if there is)
+     */
+    public void deleteText() {
+        var cur = mCursor;
+        if (cur.isSelected()) {
+            mText.delete(cur.getLeftLine(), cur.getLeftColumn(), cur.getRightLine(), cur.getRightColumn());
+        } else {
+            int col = cur.getLeftColumn(), len = 1;
+            int line = cur.getLeftLine();
+            if (mProps.deleteEmptyLineFast || (mProps.deleteMultiSpaces != 1 && col > 0 && mText.charAt(line, col - 1) == ' ')) {
+                // Check whether selection is in leading spaces
+                var text = mText.getLine(cur.getLeftLine()).value;
+                var inLeading = true;
+                for (int i = col - 1; i >= 0; i--) {
+                    char ch = text[i];
+                    if (ch != ' ' && ch != '\t') {
+                        inLeading = false;
+                        break;
+                    }
+                }
+
+                if (inLeading) {
+                    // Check empty line
+                    var emptyLine = true;
+                    var max = mText.getColumnCount(line);
+                    for (int i = col; i < max; i++) {
+                        char ch = text[i];
+                        if (ch != ' ' && ch != '\t') {
+                            emptyLine = false;
+                            break;
+                        }
+                    }
+                    if (mProps.deleteEmptyLineFast && emptyLine) {
+                        if (line == 0) {
+                            // Just delete whitespaces before
+                            mText.delete(line, 0, line, col);
+                        } else {
+                            mText.delete(line - 1, mText.getColumnCount(line - 1), line, max);
+                        }
+                        return;
+                    }
+
+                    if (mProps.deleteMultiSpaces != 1 && col > 0 && mText.charAt(line, col - 1) == ' ') {
+                        mText.delete(line, Math.max(0, col - (mProps.deleteMultiSpaces == -1 ? getTabWidth() : mProps.deleteMultiSpaces)), line, col);
+                        return;
+                    }
+                }
+            }
+            // Do not put cursor inside combined characters
+            if (col > 1) {
+                int left = TextLayoutHelper.get().getCurPosLeft(col, mText.getLine(cur.getLeftLine()));
+                len = col - left;
+            }
+            mText.delete(cur.getLeftLine(), cur.getLeftColumn() - len, cur.getLeftLine(), cur.getLeftColumn());
+        }
+    }
+
+    /**
+     * Commit text to the content from IME
+     */
+    public void commitText(CharSequence text) {
+        commitText(text, true);
+    }
+
+    /**
+     * Commit text at current state from IME
+     *
+     * @param text Text commit by InputConnection
+     */
+    public void commitText(CharSequence text, boolean applyAutoIndent) {
+        var cur = mCursor;
+        if (cur.isSelected()) {
+            mText.replace(cur.getLeftLine(), cur.getLeftColumn(), cur.getRightLine(), cur.getRightColumn(), text);
+        } else {
+            if (mProps.autoIndent && text.length() != 0 && applyAutoIndent) {
+                char first = text.charAt(0);
+                if (first == '\n') {
+                    String line = mText.getLineString(cur.getLeftLine());
+                    int p = 0, count = 0;
+                    while (p < cur.getLeftColumn()) {
+                        if (isWhitespace(line.charAt(p))) {
+                            if (line.charAt(p) == '\t') {
+                                count += mTabWidth;
+                            } else {
+                                count++;
+                            }
+                            p++;
+                        } else {
+                            break;
+                        }
+                    }
+                    try {
+                        count += mLanguage.getIndentAdvance(new ContentReference(mText), cur.getLeftLine(), cur.getLeftColumn());
+                    } catch (Exception e) {
+                        Log.w(LOG_TAG, "Language object error", e);
+                    }
+                    StringBuilder sb = new StringBuilder(text);
+                    sb.insert(1, TextUtils.createIndent(count, mTabWidth, mLanguage.useTab()));
+                    text = sb;
+                }
+            }
+            mText.insert(cur.getLeftLine(), cur.getLeftColumn(), text);
+        }
+    }
+
+    /**
+     * @see #setLineInfoTextSize(float)
+     */
+    public float getLineInfoTextSize() {
+        return mLineInfoTextSize;
+    }
+
+    /**
+     * Set text size for line info panel
+     *
+     * @param size Text size for line information, <strong>unit is SP</strong>
+     */
+    public void setLineInfoTextSize(float size) {
+        if (size <= 0) {
+            throw new IllegalArgumentException();
+        }
+        mLineInfoTextSize = size;
+    }
+
+    /**
+     * Sets non-printable painting flags.
+     * Specify where they should be drawn.
+     * <p>
+     * Flags can be mixed.
+     *
+     * @param flags Flags
+     * @see #FLAG_DRAW_WHITESPACE_LEADING
+     * @see #FLAG_DRAW_WHITESPACE_INNER
+     * @see #FLAG_DRAW_WHITESPACE_TRAILING
+     * @see #FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE
+     * @see #FLAG_DRAW_LINE_SEPARATOR
+     * @see #FLAG_DRAW_WHITESPACE_IN_SELECTION
+     */
+    public void setNonPrintablePaintingFlags(int flags) {
+        this.mNonPrintableOptions = flags;
+        invalidate();
+    }
+
+    /**
+     * @see #setNonPrintablePaintingFlags(int)
+     * @see #FLAG_DRAW_WHITESPACE_LEADING
+     * @see #FLAG_DRAW_WHITESPACE_INNER
+     * @see #FLAG_DRAW_WHITESPACE_TRAILING
+     * @see #FLAG_DRAW_WHITESPACE_FOR_EMPTY_LINE
+     * @see #FLAG_DRAW_LINE_SEPARATOR
+     * @see #FLAG_DRAW_WHITESPACE_IN_SELECTION
+     */
+    public int getNonPrintableFlags() {
+        return mNonPrintableOptions;
+    }
+
+    /**
+     * Make the selection visible
+     */
+    public void ensureSelectionVisible() {
+        ensurePositionVisible(getCursor().getRightLine(), getCursor().getRightColumn());
+    }
+
+    /**
+     * Make the given character position visible
+     *
+     * @param line   Line of char
+     * @param column Column of char
+     */
+    public void ensurePositionVisible(int line, int column) {
+        float[] layoutOffset = mLayout.getCharLayoutOffset(line, column);
+        // x offset is the left of character
+        float xOffset = layoutOffset[1] + measureTextRegionOffset();
+        // y offset is the bottom of row
+        float yOffset = layoutOffset[0];
+
+        float targetY = getOffsetY();
+        float targetX = getOffsetX();
+
+        if (yOffset - getRowHeight() < getOffsetY()) {
+            //top invisible
+            targetY = yOffset - getRowHeight() * 1.1f;
+        }
+        if (yOffset > getHeight() + getOffsetY()) {
+            //bottom invisible
+            targetY = yOffset - getHeight() + getRowHeight() * 0.1f;
+        }
+        float charWidth = column == 0 ? 0 : measureText(mText.getLine(line), column - 1, 1, line);
+        if (xOffset < getOffsetX()) {
+            targetX = xOffset - charWidth * 0.2f;
+        }
+        if (xOffset + charWidth > getOffsetX() + getWidth()) {
+            targetX = xOffset + charWidth * 0.8f - getWidth();
+        }
+
+        targetX = Math.max(0, Math.min(getScrollMaxX(), targetX));
+        targetY = Math.max(0, Math.min(getScrollMaxY(), targetY));
+
+        if (targetY == getOffsetY() && targetX == getOffsetX()) {
+            invalidate();
+            return;
+        }
+
+        boolean animation = System.currentTimeMillis() - mLastMakeVisible >= 100;
+        mLastMakeVisible = System.currentTimeMillis();
+        if (animation) {
+            getScroller().forceFinished(true);
+            getScroller().startScroll(getOffsetX(), getOffsetY(), (int) (targetX - getOffsetX()), (int) (targetY - getOffsetY()));
+            if (Math.abs(getOffsetY() - targetY) > mDpUnit * 100) {
+                mEventHandler.notifyScrolled();
+            }
+        } else {
+            getScroller().startScroll(getOffsetX(), getOffsetY(), (int) (targetX - getOffsetX()), (int) (targetY - getOffsetY()), 0);
+        }
+
+        dispatchEvent(new ScrollEvent(this, getOffsetX(),
+                getOffsetY(), (int) targetX, (int)targetY, ScrollEvent.CAUSE_MAKE_POSITION_VISIBLE));
+
+        invalidate();
+    }
+
+    /**
+     * Whether there is clip
+     *
+     * @return whether clip in clip board
+     */
+    public boolean hasClip() {
+        return mClipboardManager.hasPrimaryClip();
+    }
+
+    /**
+     * Get 1dp = ?px
+     *
+     * @return 1dp in pixel
+     */
+    public float getDpUnit() {
+        return mDpUnit;
+    }
+
+    /**
+     * Get scroller from EventHandler
+     * You would better not use it for your own scrolling
+     *
+     * @return The scroller
+     */
+    public OverScroller getScroller() {
+        return mEventHandler.getScroller();
+    }
+
+    /**
+     * Checks whether the position is over max Y position
+     *
+     * @param posOnScreen Y position on view
+     * @return Whether over max Y
+     */
+    public boolean isOverMaxY(float posOnScreen) {
+        return posOnScreen + getOffsetY() > mLayout.getLayoutHeight();
+    }
+
+    /**
+     * Determine character position using positions in scroll coordinate
+     *
+     * @param xOffset Horizontal position in scroll coordinate
+     * @param yOffset Vertical position in scroll coordinate
+     * @return IntPair. first is line and second is column
+     * @see IntPair
+     */
+    public long getPointPosition(float xOffset, float yOffset) {
+        return mLayout.getCharPositionForLayoutOffset(xOffset - measureTextRegionOffset(), yOffset);
+    }
+
+    /**
+     * Determine character position using positions on view
+     *
+     * @param x X on view
+     * @param y Y on view
+     * @return IntPair. first is line and second is column
+     * @see IntPair
+     */
+    public long getPointPositionOnScreen(float x, float y) {
+        return getPointPosition(x + getOffsetX(), y + getOffsetY());
+    }
+
+    /**
+     * Get max scroll y
+     *
+     * @return max scroll y
+     */
+    public int getScrollMaxY() {
+        return Math.max(0, mLayout.getLayoutHeight() - getHeight() / 2);
+    }
+
+    /**
+     * Get max scroll x
+     *
+     * @return max scroll x
+     */
+    public int getScrollMaxX() {
+        return (int) Math.max(0, mLayout.getLayoutWidth() + measureTextRegionOffset() - getWidth() / 2f);
+    }
+
+    /**
+     * Get EditorSearcher
+     *
+     * @return EditorSearcher
+     */
+    public EditorSearcher getSearcher() {
+        return mSearcher;
+    }
+
+    /**
+     * Set selection around the given position
+     * It will try to set selection as near as possible (Exactly the position if that position exists)
+     */
+    protected void setSelectionAround(int line, int column) {
+        if (line < getLineCount()) {
+            int columnCount = mText.getColumnCount(line);
+            if (column > columnCount) {
+                column = columnCount;
+            }
+            setSelection(line, column);
+        } else {
+            setSelection(getLineCount() - 1, mText.getColumnCount(getLineCount() - 1));
+        }
+    }
+
+    /**
+     * Format text Async
+     *
+     * @return Whether the format task is scheduled
+     */
+    public synchronized boolean formatCodeAsync() {
+        if (mFormatThread != null) {
+            return false;
+        }
+        mFormatThread = new FormatThread(mText, mLanguage, this);
+        mFormatThread.start();
+        return true;
+    }
+
+    /**
+     * Get tab width
+     *
+     * @return tab width
+     */
+    public int getTabWidth() {
+        return mTabWidth;
+    }
+
+    /**
+     * Set tab width
+     *
+     * @param width tab width compared to space
+     */
+    public void setTabWidth(int width) {
+        if (width < 1) {
+            throw new IllegalArgumentException("width can not be under 1");
+        }
+        mTabWidth = width;
+        invalidateHwRenderer();
+        updateTimestamp();
+        invalidate();
+    }
+
+    /**
+     * Set max and min text size that can be used by user zooming.
+     * <p>
+     * Unit is px.
+     */
+    public void setScaleTextSizes(float minSize, float maxSize) {
+        if (minSize > maxSize) {
+            throw new IllegalArgumentException("min size can not be bigger than max size");
+        }
+        if (minSize < 2f) {
+            throw new IllegalArgumentException("min size must be at least 2px");
+        }
+        mEventHandler.minSize = minSize;
+        mEventHandler.maxSize = maxSize;
+    }
+
+    /**
+     * @see CodeEditor#setInterceptParentHorizontalScrollIfNeeded(boolean)
+     */
+    public boolean isInterceptParentHorizontalScrollEnabled() {
+        return mForceHorizontalScrollable;
+    }
+
+    /**
+     * When the parent is a scrollable view group,
+     * request it not to allow horizontal scrolling to be intercepted.
+     * Until the code cannot scroll horizontally
+     *
+     * @param forceHorizontalScrollable Whether force horizontal scrolling
+     */
+    public void setInterceptParentHorizontalScrollIfNeeded(boolean forceHorizontalScrollable) {
+        this.mForceHorizontalScrollable = forceHorizontalScrollable;
+        if (!forceHorizontalScrollable) {
+            ViewParent parent = getParent();
+            if (parent != null) {
+                parent.requestDisallowInterceptTouchEvent(false);
+            }
+        }
+    }
+
+    /**
+     * @see CodeEditor#setInputType(int)
+     */
+    public int getInputType() {
+        return mInputType;
+    }
+
+    /**
+     * Specify input type for the editor
+     * <p>
+     * Zero for default input type
+     *
+     * @see EditorInfo#inputType
+     */
+    public void setInputType(int inputType) {
+        mInputType = inputType;
+        restartInput();
+    }
+
+    /**
+     * Undo last action
+     */
+    public void undo() {
+        mText.undo();
+        mCompletionWindow.hide();
+    }
+
+    /**
+     * Redo last action
+     */
+    public void redo() {
+        mText.redo();
+        mCompletionWindow.hide();
+    }
+
+    /**
+     * Checks whether we can undo
+     *
+     * @return true if we can undo
+     */
+    public boolean canUndo() {
+        return mText.canUndo();
+    }
+
+    /**
+     * Checks whether we can redo
+     *
+     * @return true if we can redo
+     */
+    public boolean canRedo() {
+        return mText.canRedo();
+    }
+
+    /**
+     * @return Enabled/Disabled
+     * @see CodeEditor#setUndoEnabled(boolean)
+     */
+    public boolean isUndoEnabled() {
+        return mUndoEnabled;
+    }
+
+    /**
+     * Enable / disabled undo manager
+     *
+     * @param enabled Enable/Disable
+     */
+    public void setUndoEnabled(boolean enabled) {
+        mUndoEnabled = enabled;
+        if (mText != null) {
+            mText.setUndoEnabled(enabled);
+        }
+    }
+
+    /**
+     * Start search action mode
+     */
+    public void beginSearchMode() {
+        class SearchActionMode implements ActionMode.Callback {
+
+            @Override
+            public boolean onCreateActionMode(ActionMode p1, Menu p2) {
+                mStartedActionMode = ACTION_MODE_SEARCH_TEXT;
+                p2.add(0, 0, 0, R.string.next).setShowAsActionFlags(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+                p2.add(0, 1, 0, R.string.last).setShowAsActionFlags(MenuItem.SHOW_AS_ACTION_NEVER);
+                p2.add(0, 2, 0, R.string.replace).setShowAsActionFlags(MenuItem.SHOW_AS_ACTION_NEVER);
+                p2.add(0, 3, 0, R.string.replaceAll).setShowAsActionFlags(MenuItem.SHOW_AS_ACTION_NEVER);
+                SearchView sv = new SearchView(getContext());
+                sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+
+                    @Override
+                    public boolean onQueryTextSubmit(String text) {
+                        getSearcher().gotoNext();
+                        return false;
+                    }
+
+                    @Override
+                    public boolean onQueryTextChange(String text) {
+                        getSearcher().search(text);
+                        return false;
+                    }
+
+                });
+                p1.setCustomView(sv);
+                sv.performClick();
+                sv.setQueryHint(getContext().getString(R.string.text_to_search));
+                sv.setIconifiedByDefault(false);
+                sv.setIconified(false);
+                return true;
+            }
+
+            @Override
+            public boolean onPrepareActionMode(ActionMode p1, Menu p2) {
+                return true;
+            }
+
+            @Override
+            public boolean onActionItemClicked(final ActionMode am, MenuItem p2) {
+                switch (p2.getItemId()) {
+                    case 1:
+                        getSearcher().gotoLast();
+                        break;
+                    case 0:
+                        getSearcher().gotoNext();
+                        break;
+                    case 2:
+                    case 3:
+                        final boolean replaceAll = p2.getItemId() == 3;
+                        final EditText et = new EditText(getContext());
+                        et.setHint(R.string.replacement);
+                        new AlertDialog.Builder(getContext())
+                                .setTitle(replaceAll ? R.string.replaceAll : R.string.replace)
+                                .setView(et)
+                                .setNegativeButton(R.string.cancel, null)
+                                .setPositiveButton(R.string.replace, (dialog, which) -> {
+                                    if (replaceAll) {
+                                        getSearcher().replaceAll(et.getText().toString());
+                                    } else {
+                                        getSearcher().replaceThis(et.getText().toString());
+                                    }
+                                    am.finish();
+                                    dialog.dismiss();
+                                })
+                                .show();
+                        break;
+                }
+                return false;
+            }
+
+            @Override
+            public void onDestroyActionMode(ActionMode p1) {
+                mStartedActionMode = ACTION_MODE_NONE;
+                getSearcher().stopSearch();
+            }
+
+        }
+        ActionMode.Callback callback = new SearchActionMode();
+        startActionMode(callback);
+    }
+
+    /**
+     * Get {@link EditorTouchEventHandler} of the editor
+     */
+    public EditorTouchEventHandler getEventHandler() {
+        return mEventHandler;
+    }
+
+    /**
+     * @return Margin of divider line
+     * @see CodeEditor#setDividerMargin(float)
+     */
+    public float getDividerMargin() {
+        return mDividerMargin;
+    }
+
+    /**
+     * Set divider line's left and right margin
+     *
+     * @param dividerMargin Margin for divider line
+     */
+    public void setDividerMargin(float dividerMargin) {
+        if (dividerMargin < 0) {
+            throw new IllegalArgumentException("margin can not be under zero");
+        }
+        this.mDividerMargin = dividerMargin;
+        invalidate();
+    }
+
+    /**
+     * @return Width of divider line
+     * @see CodeEditor#setDividerWidth(float)
+     */
+    public float getDividerWidth() {
+        return mDividerWidth;
+    }
+
+    /**
+     * Set divider line's width
+     *
+     * @param dividerWidth Width of divider line
+     */
+    public void setDividerWidth(float dividerWidth) {
+        if (dividerWidth < 0) {
+            throw new IllegalArgumentException("width can not be under zero");
+        }
+        this.mDividerWidth = dividerWidth;
+        invalidate();
+    }
+
+    /**
+     * @return Typeface of line number
+     * @see CodeEditor#setTypefaceLineNumber(Typeface)
+     */
+    public Typeface getTypefaceLineNumber() {
+        return mPaintOther.getTypeface();
+    }
+
+    /**
+     * Set line number's typeface
+     *
+     * @param typefaceLineNumber New typeface
+     */
+    public void setTypefaceLineNumber(Typeface typefaceLineNumber) {
+        if (typefaceLineNumber == null) {
+            typefaceLineNumber = Typeface.MONOSPACE;
+        }
+        mPaintOther.setTypeface(typefaceLineNumber);
+        mLineNumberMetrics = mPaintOther.getFontMetricsInt();
+        invalidate();
+    }
+
+    /**
+     * @return Typeface of text
+     * @see CodeEditor#setTypefaceText(Typeface)
+     */
+    public Typeface getTypefaceText() {
+        return mPaint.getTypeface();
+    }
+
+    /**
+     * Set text's typeface
+     *
+     * @param typefaceText New typeface
+     */
+    public void setTypefaceText(Typeface typefaceText) {
+        if (typefaceText == null) {
+            typefaceText = Typeface.DEFAULT;
+        }
+        mPaint.setTypefaceWrapped(typefaceText);
+        mTextMetrics = mPaint.getFontMetricsInt();
+        invalidateHwRenderer();
+        updateTimestamp();
+        createLayout();
+        invalidate();
+    }
+
+    /**
+     * @return Line number align
+     * @see CodeEditor#setLineNumberAlign(Paint.Align)
+     */
+    public Paint.Align getLineNumberAlign() {
+        return mLineNumberAlign;
+    }
+
+    /**
+     * Set line number align
+     *
+     * @param align Align for line number
+     */
+    public void setLineNumberAlign(Paint.Align align) {
+        if (align == null) {
+            align = Paint.Align.LEFT;
+        }
+        mLineNumberAlign = align;
+        invalidate();
+    }
+
+    /**
+     * Width for insert cursor
+     *
+     * @param width Cursor width
+     */
+    public void setCursorWidth(float width) {
+        if (width < 0) {
+            throw new IllegalArgumentException("width can not be under zero");
+        }
+        mInsertSelWidth = width;
+        invalidate();
+    }
+
+    /**
+     * Get Cursor
+     * Internal method!
+     *
+     * @return Cursor of text
+     */
+    public Cursor getCursor() {
+        return mCursor;
+    }
+
+    /**
+     * Get line count
+     *
+     * @return line count
+     */
+    public int getLineCount() {
+        return mText.getLineCount();
+    }
+
+    /**
+     * Get first visible line on screen
+     *
+     * @return first visible line
+     */
+    public int getFirstVisibleLine() {
+        try {
+            return mLayout.getLineNumberForRow(getFirstVisibleRow());
+        } catch (IndexOutOfBoundsException e) {
+            return 0;
+        }
+    }
+
+    /**
+     * Get first visible row on screen
+     *
+     * @return first visible row
+     */
+    public int getFirstVisibleRow() {
+        return Math.max(0, getOffsetY() / getRowHeight());
+    }
+
+    /**
+     * Get last visible row on screen.
+     * The result is <strong>unchecked</strong>. It can be bigger than the max row count in layout
+     *
+     * @return last visible row
+     */
+    public int getLastVisibleRow() {
+        return Math.max(0, Math.min(mLayout.getLayoutHeight(), getOffsetY() + getHeight()) / getRowHeight());
+    }
+
+    /**
+     * Get last visible line on screen
+     *
+     * @return last visible line
+     */
+    public int getLastVisibleLine() {
+        try {
+            return mLayout.getLineNumberForRow(getLastVisibleRow());
+        } catch (IndexOutOfBoundsException e) {
+            return getLineCount() - 1;
+        }
+    }
+
+    /**
+     * Checks whether this row is visible on screen
+     *
+     * @param row Row to check
+     * @return Whether visible
+     */
+    public boolean isRowVisible(int row) {
+        return (getFirstVisibleRow() <= row && row <= getLastVisibleRow());
+    }
+
+    /**
+     * Get baseline directly
+     *
+     * @param row Row
+     * @return baseline y offset
+     */
+    public int getRowBaseline(int row) {
+        return getRowHeight() * (row + 1) - mTextMetrics.descent;
+    }
+
+    /**
+     * Get row height
+     *
+     * @return height of single row
+     */
+    public int getRowHeight() {
+        return mTextMetrics.descent - mTextMetrics.ascent;
+    }
+
+    /**
+     * Get row top y offset
+     *
+     * @param row Row
+     * @return top y offset
+     */
+    public int getRowTop(int row) {
+        return getRowHeight() * row;
+    }
+
+    /**
+     * Get row bottom y offset
+     *
+     * @param row Row
+     * @return Bottom y offset
+     */
+    public int getRowBottom(int row) {
+        return getRowHeight() * (row + 1);
+    }
+
+    /**
+     * Get scroll x
+     *
+     * @return scroll x
+     */
+    public int getOffsetX() {
+        return mEventHandler.getScroller().getCurrX();
+    }
+
+    /**
+     * Get scroll y
+     *
+     * @return scroll y
+     */
+    public int getOffsetY() {
+        return mEventHandler.getScroller().getCurrY();
+    }
+
+    /**
+     * @return Whether editable
+     * @see CodeEditor#setEditable(boolean)
+     */
+    public boolean isEditable() {
+        return mEditable;
+    }
+
+    /**
+     * Set whether text can be edited
+     *
+     * @param editable Editable
+     */
+    public void setEditable(boolean editable) {
+        mEditable = editable;
+        if (!editable) {
+            hideSoftInput();
+        }
+    }
+
+    /**
+     * Allow scale text size by thumb
+     *
+     * @param scale Whether allow
+     */
+    public void setScalable(boolean scale) {
+        mScalable = scale;
+    }
+
+    /**
+     * @return Whether allow scaling
+     * @see CodeEditor#setScalable(boolean)
+     */
+    public boolean isScalable() {
+        return mScalable;
+    }
+
+    public void setBlockLineEnabled(boolean enabled) {
+        mBlockLineEnabled = enabled;
+        invalidate();
+    }
+
+    public boolean isBlockLineEnabled() {
+        return mBlockLineEnabled;
+    }
+
+    /**
+     * Get the target cursor to move when shift is pressed
+     */
+    private CharPosition getSelectingTarget() {
+        if (mCursor.left().equals(mSelectionAnchor)) {
+            return mCursor.right();
+        } else {
+            return mCursor.left();
+        }
+    }
+
+    /**
+     * Make sure the moving selection is visible
+     */
+    private void ensureSelectingTargetVisible() {
+        if (mCursor.left().equals(mSelectionAnchor)) {
+            // Ensure right selection visible
+            ensureSelectionVisible();
+        } else {
+            ensurePositionVisible(mCursor.getLeftLine(), mCursor.getLeftColumn());
+        }
+    }
+
+    /**
+     * Move the selection down
+     * If the auto complete panel is shown,move the selection in panel to next
+     */
+    public void moveSelectionDown() {
+        if (mSelectionAnchor == null) {
+            if (mCompletionWindow.isShowing()) {
+                mCompletionWindow.moveDown();
+                return;
+            }
+            long pos = mCursor.getDownOf(IntPair.pack(mCursor.getLeftLine(), mCursor.getLeftColumn()));
+            setSelection(IntPair.getFirst(pos), IntPair.getSecond(pos));
+        } else {
+            mCompletionWindow.hide();
+            long pos = mCursor.getDownOf(getSelectingTarget().toIntPair());
+            setSelectionRegion(mSelectionAnchor.line, mSelectionAnchor.column, IntPair.getFirst(pos), IntPair.getSecond(pos), false);
+            ensureSelectingTargetVisible();
+        }
+    }
+
+    /**
+     * Move the selection up
+     * If Auto complete panel is shown,move the selection in panel to last
+     */
+    public void moveSelectionUp() {
+        if (mSelectionAnchor == null) {
+            if (mCompletionWindow.isShowing()) {
+                mCompletionWindow.moveUp();
+                return;
+            }
+            long pos = mCursor.getUpOf(IntPair.pack(mCursor.getLeftLine(), mCursor.getLeftColumn()));
+            setSelection(IntPair.getFirst(pos), IntPair.getSecond(pos));
+        } else {
+            mCompletionWindow.hide();
+            long pos = mCursor.getUpOf(getSelectingTarget().toIntPair());
+            setSelectionRegion(mSelectionAnchor.line, mSelectionAnchor.column, IntPair.getFirst(pos), IntPair.getSecond(pos), false);
+            ensureSelectingTargetVisible();
+        }
+    }
+
+    /**
+     * Move the selection left
+     */
+    public void moveSelectionLeft() {
+        if (mSelectionAnchor == null) {
+            Cursor c = getCursor();
+            int line = c.getLeftLine();
+            int column = c.getLeftColumn();
+            long pos = mCursor.getLeftOf(IntPair.pack(line, column));
+            int lineAfter = IntPair.getFirst(pos);
+            int columnAfter = IntPair.getSecond(pos);
+            setSelection(lineAfter, columnAfter);
+            if (line == lineAfter) {
+                if (mCompletionWindow.isShowing()) {
+                    if (columnAfter == 0) {
+                        mCompletionWindow.hide();
+                    } else {
+                        mCompletionWindow.requireCompletion();
+                    }
+                }
+            }
+        } else {
+            mCompletionWindow.hide();
+            long pos = mCursor.getLeftOf(getSelectingTarget().toIntPair());
+            setSelectionRegion(mSelectionAnchor.line, mSelectionAnchor.column, IntPair.getFirst(pos), IntPair.getSecond(pos), false);
+            ensureSelectingTargetVisible();
+        }
+    }
+
+    /**
+     * Move the selection right
+     */
+    public void moveSelectionRight() {
+        if (mSelectionAnchor == null) {
+            Cursor c = getCursor();
+            int line = c.getLeftLine();
+            int column = c.getLeftColumn();
+            int c_column = getText().getColumnCount(line);
+            long pos = mCursor.getRightOf(IntPair.pack(line, column));
+            int lineAfter = IntPair.getFirst(pos);
+            int columnAfter = IntPair.getSecond(pos);
+            setSelection(lineAfter, columnAfter);
+            if (line == lineAfter && mCompletionWindow.isShowing()) {
+                mCompletionWindow.requireCompletion();
+            }
+        } else {
+            mCompletionWindow.hide();
+            long pos = mCursor.getRightOf(getSelectingTarget().toIntPair());
+            setSelectionRegion(mSelectionAnchor.line, mSelectionAnchor.column, IntPair.getFirst(pos), IntPair.getSecond(pos), false);
+            ensureSelectingTargetVisible();
+        }
+    }
+
+    /**
+     * Move selection to end of line
+     */
+    public void moveSelectionEnd() {
+        if (mSelectionAnchor == null) {
+            int line = mCursor.getLeftLine();
+            setSelection(line, getText().getColumnCount(line));
+        } else {
+            int line = getSelectingTarget().line;
+            setSelectionRegion(mSelectionAnchor.line, mSelectionAnchor.column, line, getText().getColumnCount(line), false);
+            ensureSelectingTargetVisible();
+        }
+    }
+
+    /**
+     * Move selection to start of line
+     */
+    public void moveSelectionHome() {
+        if (mSelectionAnchor == null) {
+            setSelection(mCursor.getLeftLine(), 0);
+        } else {
+            setSelectionRegion(mSelectionAnchor.line, mSelectionAnchor.column, getSelectingTarget().line, 0, false);
+            ensureSelectingTargetVisible();
+        }
+    }
+
+    /**
+     * Move selection to given position
+     *
+     * @param line          The line to move
+     * @param column        The column to move
+     */
+    public void setSelection(int line, int column) {
+        setSelection(line, column, SelectionChangeEvent.CAUSE_UNKNOWN);
+    }
+
+    /**
+     * Move selection to given position
+     *
+     * @param line   The line to move
+     * @param column The column to move
+     */
+    public void setSelection(int line, int column, int cause) {
+        setSelection(line, column, true, cause);
+    }
+
+    /**
+     * Move selection to given position
+     *
+     * @param line          The line to move
+     * @param column        The column to move
+     * @param makeItVisible Make the character visible
+     */
+    public void setSelection(int line, int column, boolean makeItVisible) {
+        setSelection(line, column, makeItVisible, SelectionChangeEvent.CAUSE_UNKNOWN);
+    }
+
+    /**
+     * Move selection to given position
+     *
+     * @param line          The line to move
+     * @param column        The column to move
+     * @param makeItVisible Make the character visible
+     */
+    public void setSelection(int line, int column, boolean makeItVisible, int cause) {
+        invalidateInCursor();
+        mCursorAnimator.markStartPos();
+        if (column > 0 && Character.isHighSurrogate(mText.charAt(line, column - 1))) {
+            column++;
+            if (column > mText.getColumnCount(line)) {
+                column--;
+            }
+        }
+        mCursor.set(line, column);
+        if (mHighlightCurrentBlock) {
+            mCursorPosition = findCursorBlock();
+        }
+        updateCursor();
+        invalidateInCursor();
+        if (!mEventHandler.hasAnyHeldHandle()) {
+            mCursorAnimator.markEndPosAndStart();
+        }
+        if (makeItVisible) {
+            ensurePositionVisible(line, column);
+        } else {
+            invalidate();
+        }
+        onSelectionChanged(cause);
+    }
+
+    /**
+     * Select all text
+     */
+    public void selectAll() {
+        setSelectionRegion(0, 0, getLineCount() - 1, getText().getColumnCount(getLineCount() - 1));
+    }
+
+    /**
+     * Set selection region with a call to {@link CodeEditor#ensureSelectionVisible()}
+     *
+     * @param lineLeft    Line left
+     * @param columnLeft  Column Left
+     * @param lineRight   Line right
+     * @param columnRight Column right
+     */
+    public void setSelectionRegion(int lineLeft, int columnLeft, int lineRight, int columnRight, int cause) {
+        setSelectionRegion(lineLeft, columnLeft, lineRight, columnRight, true, cause);
+    }
+
+    /**
+     * Set selection region with a call to {@link CodeEditor#ensureSelectionVisible()}
+     *
+     * @param lineLeft    Line left
+     * @param columnLeft  Column Left
+     * @param lineRight   Line right
+     * @param columnRight Column right
+     */
+    public void setSelectionRegion(int lineLeft, int columnLeft, int lineRight, int columnRight) {
+        setSelectionRegion(lineLeft, columnLeft, lineRight, columnRight, true, SelectionChangeEvent.CAUSE_UNKNOWN);
+    }
+
+    /**
+     * Set selection region
+     *
+     * @param lineLeft         Line left
+     * @param columnLeft       Column Left
+     * @param lineRight        Line right
+     * @param columnRight      Column right
+     * @param makeRightVisible Whether to make right cursor visible
+     */
+    public void setSelectionRegion(int lineLeft, int columnLeft, int lineRight, int columnRight, boolean makeRightVisible) {
+        setSelectionRegion(lineLeft, columnLeft, lineRight, columnRight, makeRightVisible, SelectionChangeEvent.CAUSE_UNKNOWN);
+    }
+
+    /**
+     * Set selection region
+     *
+     * @param lineLeft         Line left
+     * @param columnLeft       Column Left
+     * @param lineRight        Line right
+     * @param columnRight      Column right
+     * @param makeRightVisible Whether to make right cursor visible
+     */
+    public void setSelectionRegion(int lineLeft, int columnLeft, int lineRight, int columnRight, boolean makeRightVisible, int cause) {
+        invalidateInCursor();
+        int start = getText().getCharIndex(lineLeft, columnLeft);
+        int end = getText().getCharIndex(lineRight, columnRight);
+        if (start == end) {
+            setSelection(lineLeft, columnLeft);
+            return;
+        }
+        if (start > end) {
+            setSelectionRegion(lineRight, columnRight, lineLeft, columnLeft, makeRightVisible, cause);
+            Log.w(LOG_TAG, "setSelectionRegion() error: start > end:start = " + start + " end = " + end + " lineLeft = " + lineLeft + " columnLeft = " + columnLeft + " lineRight = " + lineRight + " columnRight = " + columnRight);
+            return;
+        }
+        mCursorAnimator.cancel();
+        boolean lastState = mCursor.isSelected();
+        if (columnLeft > 0) {
+            int column = columnLeft - 1;
+            char ch = mText.charAt(lineLeft, column);
+            if (Character.isHighSurrogate(ch)) {
+                columnLeft++;
+                if (columnLeft > mText.getColumnCount(lineLeft)) {
+                    columnLeft--;
+                }
+            }
+        }
+        if (columnRight > 0) {
+            int column = columnRight - 1;
+            char ch = mText.charAt(lineRight, column);
+            if (Character.isHighSurrogate(ch)) {
+                columnRight++;
+                if (columnRight > mText.getColumnCount(lineRight)) {
+                    columnRight--;
+                }
+            }
+        }
+        mCursor.setLeft(lineLeft, columnLeft);
+        mCursor.setRight(lineRight, columnRight);
+        invalidateInCursor();
+        updateCursor();
+        mCompletionWindow.hide();
+        if (makeRightVisible) {
+            ensurePositionVisible(lineRight, columnRight);
+        } else {
+            invalidate();
+        }
+        onSelectionChanged(cause);
+    }
+
+    /**
+     * Move to next page
+     */
+    public void movePageDown() {
+        mEventHandler.scrollBy(0, getHeight(), true);
+        mCompletionWindow.hide();
+    }
+
+    /**
+     * Move to previous page
+     */
+    public void movePageUp() {
+        mEventHandler.scrollBy(0, -getHeight(), true);
+        mCompletionWindow.hide();
+    }
+
+    /**
+     * Paste text from clip board
+     */
+    public void pasteText() {
+        try {
+            if (!mClipboardManager.hasPrimaryClip() || mClipboardManager.getPrimaryClip() == null) {
+                return;
+            }
+            ClipData.Item data = mClipboardManager.getPrimaryClip().getItemAt(0);
+            CharSequence text = data.getText();
+            if (text != null && mConnection != null) {
+                mConnection.commitText(text, 0);
+            }
+            notifyIMEExternalCursorChange();
+        } catch (Exception e) {
+            e.printStackTrace();
+            Toast.makeText(getContext(), e.toString(), Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    /**
+     * Copy text to clip board
+     */
+    public void copyText() {
+        try {
+            if (mCursor.isSelected()) {
+                String clip = getText().subContent(mCursor.getLeftLine(),
+                        mCursor.getLeftColumn(),
+                        mCursor.getRightLine(),
+                        mCursor.getRightColumn()).toString();
+                mClipboardManager.setPrimaryClip(ClipData.newPlainText(clip, clip));
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            Toast.makeText(getContext(), e.toString(), Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    /**
+     * Copy text to clipboard and delete them
+     */
+    public void cutText() {
+        copyText();
+        if (mCursor.isSelected()) {
+            deleteText();
+            notifyIMEExternalCursorChange();
+        }
+    }
+
+    /**
+     * @return Text displaying, the result is read-only. You should not make changes to this object as it is used internally
+     * @see CodeEditor#setText(CharSequence)
+     * @see CodeEditor#setText(CharSequence, Bundle)
+     */
+    @NonNull
+    public Content getText() {
+        return mText;
+    }
+
+    /**
+     * Get extra argument set by {@link CodeEditor#setText(CharSequence, Bundle)}
+     */
+    @NonNull
+    public Bundle getExtraArguments() {
+        return mExtraArguments;
+    }
+
+    /**
+     * Set the text to be displayed.
+     * With no extra arguments.
+     *
+     * @param text the new text you want to display
+     */
+    public void setText(@Nullable CharSequence text) {
+        setText(text, null);
+    }
+
+    /**
+     * Sets the text to be displayed.
+     *
+     * @param text the new text you want to display
+     * @param extraArguments Extra arguments for the document. This {@link Bundle} object is passed
+     *                       to all languages and plugins in editor.
+     */
+    public void setText(@Nullable CharSequence text, @Nullable Bundle extraArguments) {
+        if (text == null) {
+            text = "";
+        }
+
+        if (mText != null) {
+            mText.removeContentListener(this);
+            mText.setLineListener(null);
+        }
+        mExtraArguments = extraArguments == null ? new Bundle() : extraArguments;
+        mText = new Content(text);
+        mCursor = mText.getCursor();
+        mEventHandler.reset();
+        mText.addContentListener(this);
+        mText.setUndoEnabled(mUndoEnabled);
+        mText.setLineListener(this);
+
+        if (mLanguage != null) {
+            mLanguage.getAnalyzeManager().reset(new ContentReference(mText), extraArguments);
+        }
+
+        requestLayout();
+
+        dispatchEvent(new ContentChangeEvent(this, ContentChangeEvent.ACTION_SET_NEW_TEXT, new CharPosition(), mText.getIndexer().getCharPosition(getLineCount() - 1, mText.getColumnCount(getLineCount() - 1)), mText));
+        if (mInputMethodManager != null) {
+            mInputMethodManager.restartInput(this);
+        }
+        createLayout();
+        invalidateHwRenderer();
+        invalidate();
+    }
+
+    /**
+     * Set the editor's text size in sp unit. This value must be > 0
+     *
+     * @param textSize the editor's text size in <strong>Sp</strong> units.
+     */
+    public void setTextSize(float textSize) {
+        Context context = getContext();
+        Resources res;
+
+        if (context == null) {
+            res = Resources.getSystem();
+        } else {
+            res = context.getResources();
+        }
+
+        setTextSizePx(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, textSize, res.getDisplayMetrics()));
+    }
+
+    /**
+     * Subscribe event of the given type.
+     *
+     * @see EventManager#subscribeEvent(Class, EventReceiver)
+     */
+    public <T extends Event> void subscribeEvent(Class<T> eventType, EventReceiver<T> receiver) {
+        mEventManager.subscribeEvent(eventType, receiver);
+    }
+
+    /**
+     * Dispatch the given event
+     *
+     * @see EventManager#dispatchEvent(Event)
+     */
+    public <T extends Event> boolean dispatchEvent(T event) {
+        return mEventManager.dispatchEvent(event);
+    }
+
+    /**
+     * Check whether line numbers are shown
+     *
+     * @return The state of line number displaying
+     */
+    public boolean isLineNumberEnabled() {
+        return mLineNumberEnabled;
+    }
+
+    /**
+     * Set whether we should display line numbers
+     *
+     * @param lineNumberEnabled The state of line number displaying
+     */
+    public void setLineNumberEnabled(boolean lineNumberEnabled) {
+        if (lineNumberEnabled != mLineNumberEnabled && isWordwrap()) {
+            createLayout();
+        }
+        mLineNumberEnabled = lineNumberEnabled;
+        invalidate();
+    }
+
+    /**
+     * Get the paint of the editor
+     * You should not change text size and other attributes that are related to text measuring by the object
+     *
+     * @return The paint which is used by the editor now
+     */
+    @NonNull
+    public Paint getTextPaint() {
+        return mPaint;
+    }
+
+    /**
+     * Get the ColorScheme object of this editor
+     * You can config colors of some regions, texts and highlight text
+     *
+     * @return ColorScheme object using
+     */
+    @NonNull
+    public EditorColorScheme getColorScheme() {
+        return mColors;
+    }
+
+    /**
+     * Set a new color scheme for editor.
+     * <p>
+     * It can be a subclass of {@link EditorColorScheme}.
+     * The scheme object can only be applied to one editor instance.
+     * Otherwise, an IllegalStateException is thrown.
+     *
+     * @param colors A non-null and free EditorColorScheme
+     */
+    public void setColorScheme(@NonNull EditorColorScheme colors) {
+        colors.attachEditor(this);
+        if (mColors != null) {
+            mColors.detachEditor(this);
+        }
+        mColors = colors;
+        if (mCompletionWindow != null) {
+            mCompletionWindow.applyColorScheme();
+        }
+        invalidateHwRenderer();
+        invalidate();
+    }
+
+    /**
+     * Move selection to line start with scrolling
+     *
+     * @param line Line to jump
+     */
+    public void jumpToLine(int line) {
+        setSelection(line, 0);
+    }
+
+
+    /**
+     * Rerun analysis forcibly
+     */
+    public void rerunAnalysis() {
+        if (mLanguage != null) {
+            mLanguage.getAnalyzeManager().rerun();
+        }
+    }
+
+    /**
+     * Get analyze result.
+     * <strong>Do not make changes to it or read concurrently</strong>
+     */
+    @Nullable
+    public Styles getStyles() {
+        return mStyles;
+    }
+
+    /**
+     * Hide auto complete window if shown
+     */
+    public void hideAutoCompleteWindow() {
+        if (mCompletionWindow != null) {
+            mCompletionWindow.hide();
+        }
+    }
+
+    /**
+     * Get cursor code block index
+     *
+     * @return index of cursor's code block
+     */
+    public int getBlockIndex() {
+        return mCursorPosition;
+    }
+
+
+    //-------------------------------------------------------------------------------
+    //-------------------------IME Interaction---------------------------------------
+    //-------------------------------------------------------------------------------
+
+    /**
+     * Display soft input method for self
+     */
+    public void showSoftInput() {
+        if (isEditable() && isEnabled()) {
+            if (isInTouchMode()) {
+                requestFocusFromTouch();
+            }
+            if (!hasFocus()) {
+                requestFocus();
+            }
+            mInputMethodManager.showSoftInput(this, 0);
+        }
+        invalidate();
+    }
+
+    /**
+     * Hide soft input
+     */
+    public void hideSoftInput() {
+        mInputMethodManager.hideSoftInputFromWindow(getWindowToken(), 0);
+    }
+
+    /**
+     * Send current selection position to input method
+     */
+    protected void updateSelection() {
+        int candidatesStart = -1, candidatesEnd = -1;
+        if (mConnection.mComposingLine != -1) {
+            try {
+                candidatesStart = mText.getCharIndex(mConnection.mComposingLine, mConnection.mComposingStart);
+                candidatesEnd = mText.getCharIndex(mConnection.mComposingLine, mConnection.mComposingEnd);
+            } catch (IndexOutOfBoundsException e) {
+                //Ignored
+            }
+        }
+        mInputMethodManager.updateSelection(this, mCursor.getLeft(), mCursor.getRight(), candidatesStart, candidatesEnd);
+    }
+
+    /**
+     * Update request result for monitoring request
+     */
+    protected void updateExtractedText() {
+        if (mExtracting != null) {
+            //Logs.log("Send extracted text updates");
+            mInputMethodManager.updateExtractedText(this, mExtracting.token, extractText(mExtracting));
+        }
+    }
+
+    /**
+     * Set request needed to update when editor updates selection
+     */
+    protected void setExtracting(@Nullable ExtractedTextRequest request) {
+        mExtracting = request;
+    }
+
+    /**
+     * Extract text in editor for input method
+     */
+    protected ExtractedText extractText(@NonNull ExtractedTextRequest request) {
+        Cursor cur = getCursor();
+        ExtractedText text = new ExtractedText();
+        int selBegin = cur.getLeft();
+        int selEnd = cur.getRight();
+        int startOffset;
+        if (request.hintMaxChars == 0) {
+            request.hintMaxChars = mProps.maxIPCTextLength;
+        }
+        startOffset = 0;
+        text.text = mConnection.getTextRegion(startOffset, startOffset + request.hintMaxChars, request.flags);
+        text.startOffset = startOffset;
+        text.selectionStart = selBegin - startOffset;
+        text.selectionEnd = selEnd - startOffset;
+        if (selBegin != selEnd) {
+            text.flags |= ExtractedText.FLAG_SELECTING;
+        }
+        return text;
+    }
+
+    /**
+     * Notify input method that text has been changed for external reason
+     */
+    public void notifyIMEExternalCursorChange() {
+        updateExtractedText();
+        updateSelection();
+        updateCursorAnchor();
+        // Restart if composing
+        if (mConnection.mComposingLine != -1) {
+            restartInput();
+        }
+    }
+
+    /**
+     * Restart the input connection.
+     * Do not call this method randomly. Please refer to documentation first.
+     *
+     * @see InputConnection
+     */
+    public void restartInput() {
+        if (mConnection != null)
+            mConnection.invalid();
+        if (mInputMethodManager != null)
+            mInputMethodManager.restartInput(this);
+    }
+
+    /**
+     * Send cursor position in text and on screen to input method
+     */
+    public void updateCursor() {
+        updateCursorAnchor();
+        updateExtractedText();
+        if (!mText.isInBatchEdit()) {
+            updateSelection();
+        }
+    }
+
+    /**
+     * Release any resources held by editor.
+     * This will stop completion threads and destroy using {@link Language} object.
+     * <p>
+     * Recommend to call if the activity is to destroy.
+     */
+    public void release() {
+        mCompletionWindow.cancelCompletion();
+        if (mLanguage != null) {
+            mLanguage.getAnalyzeManager().destroy();
+            mLanguage.destroy();
+            mLanguage = new EmptyLanguage();
+        }
+    }
+
+    //-------------------------------------------------------------------------------
+    //------------------------Internal Callbacks-------------------------------------
+    //-------------------------------------------------------------------------------
+
+    /**
+     * Called by ColorScheme to notify invalidate
+     *
+     * @param type Color type changed
+     */
+    public void onColorUpdated(int type) {
+        if (type == EditorColorScheme.AUTO_COMP_PANEL_BG || type == EditorColorScheme.AUTO_COMP_PANEL_CORNER) {
+            if (mCompletionWindow != null)
+                mCompletionWindow.applyColorScheme();
+            return;
+        }
+        invalidateHwRenderer();
+        invalidate();
+    }
+
+    /**
+     * Called by color scheme to init colors
+     */
+    public void onColorFullUpdate() {
+        if (mCompletionWindow != null)
+            mCompletionWindow.applyColorScheme();
+        invalidateHwRenderer();
+        invalidate();
+    }
+
+    /**
+     * Get using InputMethodManager
+     */
+    protected InputMethodManager getInputMethodManager() {
+        return mInputMethodManager;
+    }
+
+    /**
+     * Called by CodeEditorInputConnection
+     */
+    protected void onCloseConnection() {
+        setExtracting(null);
+        invalidate();
+    }
+
+    /**
+     * Called when the text is edited or {@link CodeEditor#setSelection} is called
+     */
+    protected void onSelectionChanged(int cause) {
+        dispatchEvent(new SelectionChangeEvent(this, cause));
+    }
+
+    //-------------------------------------------------------------------------------
+    //-------------------------Override methods--------------------------------------
+    //-------------------------------------------------------------------------------
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+        drawView(canvas);
+        int x = (int) (getWidth() - getDpUnit() * 50);
+        canvas.drawLine(x, 0, x, getHeight(), mPaintGraph);
+        // Update magnifier
+        if ((mLastCursorState != mCursorBlink.visibility || !mEventHandler.getScroller().isFinished()) && mEventHandler.mMagnifier.isShowing()) {
+            mLastCursorState = mCursorBlink.visibility;
+            post(mEventHandler.mMagnifier::updateDisplay);
+        }
+    }
+
+    @Override
+    public AccessibilityNodeInfo createAccessibilityNodeInfo() {
+        AccessibilityNodeInfo node = super.createAccessibilityNodeInfo();
+        node.setEditable(isEditable());
+        node.setTextSelection(mCursor.getLeft(), mCursor.getRight());
+        node.setScrollable(true);
+        node.setInputType(InputType.TYPE_CLASS_TEXT);
+        node.setMultiLine(true);
+        node.setText(getText().toStringBuilder());
+        node.setLongClickable(true);
+        node.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_COPY);
+        node.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_CUT);
+        node.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_PASTE);
+        node.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SET_TEXT);
+        node.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD);
+        node.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD);
+        return node;
+    }
+
+    @Override
+    public boolean performAccessibilityAction(int action, Bundle arguments) {
+        switch (action) {
+            case AccessibilityNodeInfo.ACTION_COPY:
+                copyText();
+                return true;
+            case AccessibilityNodeInfo.ACTION_CUT:
+                cutText();
+                return true;
+            case AccessibilityNodeInfo.ACTION_PASTE:
+                pasteText();
+                return true;
+            case AccessibilityNodeInfo.ACTION_SET_TEXT:
+                setText(arguments.getCharSequence(AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE));
+                return true;
+            case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD:
+                movePageDown();
+                return true;
+            case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD:
+                movePageUp();
+                return true;
+        }
+        return super.performAccessibilityAction(action, arguments);
+    }
+
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent event) {
+        int x = (int) event.getX();
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                mDownX = x;
+                if (mForceHorizontalScrollable) {
+                    getParent().requestDisallowInterceptTouchEvent(true);
+                }
+                break;
+            case MotionEvent.ACTION_MOVE:
+                int deltaX = x - mDownX;
+                if (mForceHorizontalScrollable) {
+                    if (deltaX > 0 && getScroller().getCurrX() == 0
+                            || deltaX < 0 && getScroller().getCurrX() == getScrollMaxX()) {
+                        getParent().requestDisallowInterceptTouchEvent(false);
+                    }
+                }
+                break;
+        }
+        return super.dispatchTouchEvent(event);
+    }
+
+    @Override
+    public boolean onCheckIsTextEditor() {
+        return isEnabled() && isEditable();
+    }
+
+    @Override
+    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
+        if (!isEditable() || !isEnabled()) {
+            return null;
+        }
+        outAttrs.inputType = mInputType != 0 ? mInputType : EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
+        outAttrs.initialSelStart = getCursor() != null ? getCursor().getLeft() : 0;
+        outAttrs.initialSelEnd = getCursor() != null ? getCursor().getRight() : 0;
+        outAttrs.initialCapsMode = mConnection.getCursorCapsMode(0);
+
+        // Prevent fullscreen when the screen height is too small
+        // Especially in landscape mode
+        if (!mProps.allowFullscreen) {
+            outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI | EditorInfo.IME_FLAG_NO_FULLSCREEN;
+        }
+
+        mConnection.reset();
+        setExtracting(null);
+        return mConnection;
+    }
+
+    @SuppressLint("ClickableViewAccessibility")
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        if (!isEnabled()) {
+            return false;
+        }
+        boolean handlingBefore = mEventHandler.handlingMotions();
+        boolean res = mEventHandler.onTouchEvent(event);
+        boolean handling = mEventHandler.handlingMotions();
+        boolean res2 = false;
+        boolean res3 = false;
+        if (!handling && !handlingBefore) {
+            res2 = mBasicDetector.onTouchEvent(event);
+            res3 = mScaleDetector.onTouchEvent(event);
+        }
+        if (event.getAction() == MotionEvent.ACTION_UP) {
+            mVerticalEdgeGlow.onRelease();
+            mHorizontalGlow.onRelease();
+        }
+        return (res3 || res2 || res);
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        mKeyMetaStates.onKeyDown(event);
+        boolean isShiftPressed = mKeyMetaStates.isShiftPressed();
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_DPAD_DOWN:
+            case KeyEvent.KEYCODE_DPAD_UP:
+            case KeyEvent.KEYCODE_DPAD_LEFT:
+            case KeyEvent.KEYCODE_DPAD_RIGHT:
+            case KeyEvent.KEYCODE_MOVE_HOME:
+            case KeyEvent.KEYCODE_MOVE_END:
+                if (isShiftPressed && (!mCursor.isSelected())) {
+                    mSelectionAnchor = mCursor.left();
+                } else if (!isShiftPressed && mSelectionAnchor != null) {
+                    mSelectionAnchor = null;
+                }
+                mKeyMetaStates.adjust();
+        }
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_BACK: {
+                if (mCursor.isSelected()) {
+                    setSelection(mCursor.getLeftLine(), mCursor.getLeftColumn());
+                    return true;
+                }
+                return false;
+            }
+            case KeyEvent.KEYCODE_DEL:
+                if (isEditable()) {
+                    deleteText();
+                    notifyIMEExternalCursorChange();
+                }
+                return true;
+            case KeyEvent.KEYCODE_FORWARD_DEL: {
+                if (isEditable()) {
+                    mConnection.deleteSurroundingText(0, 1);
+                    notifyIMEExternalCursorChange();
+                }
+                return true;
+            }
+            case KeyEvent.KEYCODE_ENTER: {
+                if (isEditable()) {
+                    if (mCompletionWindow.isShowing()) {
+                        mCompletionWindow.select();
+                        return true;
+                    }
+                    NewlineHandler[] handlers = mLanguage.getNewlineHandlers();
+                    if (handlers == null || getCursor().isSelected()) {
+                        commitText("\n", true);
+                    } else {
+                        ContentLine line = mText.getLine(mCursor.getLeftLine());
+                        int index = mCursor.getLeftColumn();
+                        String beforeText = line.subSequence(0, index).toString();
+                        String afterText = line.subSequence(index, line.length()).toString();
+                        boolean consumed = false;
+                        for (NewlineHandler handler : handlers) {
+                            if (handler != null) {
+                                if (handler.matchesRequirement(beforeText, afterText)) {
+                                    try {
+                                        NewlineHandleResult result = handler.handleNewline(beforeText, afterText, getTabWidth());
+                                        if (result != null) {
+                                            commitText(result.text, false);
+                                            int delta = result.shiftLeft;
+                                            if (delta != 0) {
+                                                int newSel = Math.max(getCursor().getLeft() - delta, 0);
+                                                CharPosition charPosition = getCursor().getIndexer().getCharPosition(newSel);
+                                                setSelection(charPosition.line, charPosition.column);
+                                            }
+                                            consumed = true;
+                                        } else {
+                                            continue;
+                                        }
+                                    } catch (Exception e) {
+                                        Log.w(LOG_TAG, "Error occurred while calling Language's NewlineHandler", e);
+                                    }
+                                    break;
+                                }
+                            }
+                        }
+                        if (!consumed) {
+                            commitText("\n", true);
+                        }
+                    }
+                    notifyIMEExternalCursorChange();
+                }
+                return true;
+            }
+            case KeyEvent.KEYCODE_DPAD_DOWN:
+                moveSelectionDown();
+                return true;
+            case KeyEvent.KEYCODE_DPAD_UP:
+                moveSelectionUp();
+                return true;
+            case KeyEvent.KEYCODE_DPAD_LEFT:
+                moveSelectionLeft();
+                return true;
+            case KeyEvent.KEYCODE_DPAD_RIGHT:
+                moveSelectionRight();
+                return true;
+            case KeyEvent.KEYCODE_MOVE_END:
+                moveSelectionEnd();
+                return true;
+            case KeyEvent.KEYCODE_MOVE_HOME:
+                moveSelectionHome();
+                return true;
+            case KeyEvent.KEYCODE_PAGE_DOWN:
+                movePageDown();
+                return true;
+            case KeyEvent.KEYCODE_PAGE_UP:
+                movePageUp();
+                return true;
+            case KeyEvent.KEYCODE_TAB:
+                if (isEditable()) {
+                    if (mCompletionWindow.isShowing()) {
+                        mCompletionWindow.select();
+                    } else {
+                        commitTab();
+                    }
+                }
+                return true;
+            case KeyEvent.KEYCODE_PASTE:
+                if (isEditable()) {
+                    pasteText();
+                }
+                return true;
+            case KeyEvent.KEYCODE_COPY:
+                copyText();
+                return true;
+            case KeyEvent.KEYCODE_SPACE:
+                if (isEditable()) {
+                    commitText(" ");
+                    notifyIMEExternalCursorChange();
+                }
+                return true;
+            default:
+                if (event.isCtrlPressed() && !event.isAltPressed()) {
+                    switch (keyCode) {
+                        case KeyEvent.KEYCODE_V:
+                            if (isEditable()) {
+                                pasteText();
+                            }
+                            return true;
+                        case KeyEvent.KEYCODE_C:
+                            copyText();
+                            return true;
+                        case KeyEvent.KEYCODE_X:
+                            if (isEditable()) {
+                                cutText();
+                            } else {
+                                copyText();
+                            }
+                            return true;
+                        case KeyEvent.KEYCODE_A:
+                            selectAll();
+                            return true;
+                        case KeyEvent.KEYCODE_Z:
+                            if (isEditable()) {
+                                undo();
+                            }
+                            return true;
+                        case KeyEvent.KEYCODE_Y:
+                            if (isEditable()) {
+                                redo();
+                            }
+                            return true;
+                    }
+                } else if (!event.isCtrlPressed() && !event.isAltPressed()) {
+                    if (event.isPrintingKey() && isEditable()) {
+                        String text = new String(Character.toChars(event.getUnicodeChar(event.getMetaState())));
+                        SymbolPairMatch.Replacement replacement = null;
+                        if (text.length() == 1 && mProps.symbolPairAutoCompletion) {
+                            replacement = mLanguageSymbolPairs.getCompletion(text.charAt(0));
+                        }
+                        if (replacement == null || replacement == SymbolPairMatch.Replacement.NO_REPLACEMENT
+                                || (replacement.shouldNotDoReplace(getText()) && replacement.notHasAutoSurroundPair())) {
+                            commitText(text);
+                            notifyIMEExternalCursorChange();
+                        } else {
+                            String[] autoSurroundPair;
+                            if (getCursor().isSelected() && (autoSurroundPair = replacement.getAutoSurroundPair()) != null) {
+                                getText().beginBatchEdit();
+                                //insert left
+                                getText().insert(getCursor().getLeftLine(), getCursor().getLeftColumn(), autoSurroundPair[0]);
+                                //insert right
+                                getText().insert(getCursor().getRightLine(), getCursor().getRightColumn(), autoSurroundPair[1]);
+                                getText().endBatchEdit();
+                                //cancel selected
+                                setSelection(getCursor().getLeftLine(), getCursor().getLeftColumn() + autoSurroundPair[0].length() - 1);
+
+                                notifyIMEExternalCursorChange();
+                            } else {
+                                commitText(replacement.text);
+                                int delta = (replacement.text.length() - replacement.selection);
+                                if (delta != 0) {
+                                    int newSel = Math.max(getCursor().getLeft() - delta, 0);
+                                    CharPosition charPosition = getCursor().getIndexer().getCharPosition(newSel);
+                                    setSelection(charPosition.line, charPosition.column);
+                                    notifyIMEExternalCursorChange();
+                                }
+                            }
+
+                        }
+                    } else {
+                        return super.onKeyDown(keyCode, event);
+                    }
+                    return true;
+                }
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
+    @Override
+    public boolean onKeyUp(int keyCode, KeyEvent event) {
+        mKeyMetaStates.onKeyUp(event);
+        if (!mKeyMetaStates.isShiftPressed() && mSelectionAnchor != null && !mCursor.isSelected()) {
+            mSelectionAnchor = null;
+        }
+        return super.onKeyUp(keyCode, event);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        boolean warn = false;
+        //Fill the horizontal layout if WRAP_CONTENT mode
+        if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.AT_MOST || MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.UNSPECIFIED) {
+            widthMeasureSpec = MeasureSpec.makeMeasureSpec(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.EXACTLY);
+            warn = true;
+        }
+        //Fill the vertical layout if WRAP_CONTENT mode
+        if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST || MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.UNSPECIFIED) {
+            heightMeasureSpec = MeasureSpec.makeMeasureSpec(MeasureSpec.getSize(heightMeasureSpec), MeasureSpec.EXACTLY);
+            warn = true;
+        }
+        if (warn) {
+            Log.i(LOG_TAG, "onMeasure():Code editor does not support wrap_content mode when measuring.It will just fill the whole space.");
+        }
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+    }
+
+    @Override
+    public boolean onGenericMotionEvent(MotionEvent event) {
+        if (event.getAction() == MotionEvent.ACTION_SCROLL && event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
+            float v_scroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
+            float h_scroll = -event.getAxisValue(MotionEvent.AXIS_HSCROLL);
+            mEventHandler.onScroll(event, event, h_scroll * mVerticalScrollFactor, v_scroll * mVerticalScrollFactor);
+            return true;
+        }
+        return super.onGenericMotionEvent(event);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldWidth, int oldHeight) {
+        super.onSizeChanged(w, h, oldWidth, oldHeight);
+        mViewRect.right = w;
+        mViewRect.bottom = h;
+        getVerticalEdgeEffect().setSize(w, h);
+        getHorizontalEdgeEffect().setSize(h, w);
+        getVerticalEdgeEffect().finish();
+        getHorizontalEdgeEffect().finish();
+        if (isWordwrap() && w != oldWidth) {
+            createLayout();
+        } else {
+            mEventHandler.scrollBy(getOffsetX() > getScrollMaxX() ? getScrollMaxX() - getOffsetX() : 0, getOffsetY() > getScrollMaxY() ? getScrollMaxY() - getOffsetY() : 0);
+        }
+        if (oldHeight > h) {
+            ensureSelectionVisible();
+        }
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        mCursorBlink.valid = mCursorBlink.period > 0;
+        if (mCursorBlink.valid) {
+            post(mCursorBlink);
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mCursorBlink.valid = false;
+        removeCallbacks(mCursorBlink);
+    }
+
+    @Override
+    public void computeScroll() {
+        if (mEventHandler.getScroller().computeScrollOffset()) {
+            invalidate();
+        }
+    }
+
+    @Override
+    public void beforeReplace(Content content) {
+        mWait = true;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            mRenderer.beforeReplace(content);
+        }
+        mLayout.beforeReplace(content);
+    }
+
+    @Override
+    public void afterInsert(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
+        updateTimestamp();
+        var start = mText.getIndexer().getCharPosition(startLine, startColumn);
+        var end = mText.getIndexer().getCharPosition(endLine, endColumn);
+        for (int i = startLine; i <= endLine && i < getLineCount(); i++) {
+            mText.getLine(i).widthCache = null;
+        }
+
+        // Update spans
+        try {
+            if (mStyles != null) {
+                mStyles.adjustOnInsert(start, end);
+            }
+        } catch (Exception e) {
+            Log.w(LOG_TAG, "Update failure", e);
+        }
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            mRenderer.afterInsert(content, startLine, startColumn, endLine, endColumn, insertedContent);
+        }
+        mLayout.afterInsert(content, startLine, startColumn, endLine, endColumn, insertedContent);
+
+        // Notify input method
+        updateCursor();
+        mWait = false;
+
+        // Auto completion
+        if (mCompletionWindow.isEnabled() && !mText.isUndoOrRedo()) {
+            if ((mConnection.mComposingLine == -1 || mProps.autoCompletionOnComposing) && endColumn != 0 && startLine == endLine) {
+                mCompletionWindow.requireCompletion();
+            } else {
+                mCompletionWindow.hide();
+            }
+            updateCompletionWindowPosition(mCompletionWindow.isShowing());
+        } else {
+            mCompletionWindow.hide();
+        }
+
+        //Log.d(LOG_TAG, "Ins: " + startLine + " " + startColumn + ", " + endLine + " " + endColumn + ", content = " + insertedContent);
+        updateCursorAnchor();
+
+        invalidateInCursor();
+        invalidateChanged(startLine, endLine);
+        ensureSelectionVisible();
+
+        mLanguage.getAnalyzeManager().insert(start, end, insertedContent);
+        mEventHandler.hideInsertHandle();
+        onSelectionChanged(SelectionChangeEvent.CAUSE_TEXT_MODIFICATION);
+        if (!mCursor.isSelected()) {
+            mCursorAnimator.markEndPosAndStart();
+        }
+        dispatchEvent(new ContentChangeEvent(this, ContentChangeEvent.ACTION_INSERT, start, end, insertedContent));
+    }
+
+    /**
+     * Update timestamp required for measuring cache
+     */
+    protected void updateTimestamp() {
+        mTimestamp = System.nanoTime();
+    }
+
+    @Override
+    public void afterDelete(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
+        updateTimestamp();
+        var start = mText.getIndexer().getCharPosition(startLine, startColumn);
+        var end = start.fromThis();
+        end.column = endColumn;
+        end.line = endLine;
+        end.index = start.index + deletedContent.length();
+
+        for (int i = startLine; i <= startLine + 1 && i < getLineCount(); i++) {
+            mText.getLine(i).widthCache = null;
+        }
+
+        try {
+            if (mStyles != null) {
+                mStyles.adjustOnDelete(start, end);
+            }
+        } catch (Exception e) {
+            Log.w(LOG_TAG, "Update failure", e);
+        }
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            mRenderer.afterDelete(content, startLine, startColumn, endLine, endColumn, deletedContent);
+        }
+        mLayout.afterDelete(content, startLine, startColumn, endLine, endColumn, deletedContent);
+
+        updateCursor();
+
+        if (mCompletionWindow.isEnabled() && !mText.isUndoOrRedo()) {
+            if (mConnection.mComposingLine == -1 && mCompletionWindow.isShowing()) {
+                if (startLine != endLine || startColumn != endColumn - 1) {
+                    mCompletionWindow.hide();
+                } else {
+                    mCompletionWindow.requireCompletion();
+                    updateCompletionWindowPosition();
+                }
+            }
+        } else {
+            mCompletionWindow.hide();
+        }
+
+        //Log.d(LOG_TAG, "Del: " + startLine + " " + startColumn + ", " + endLine + " " + endColumn + ", content = " + deletedContent);
+
+        if (!mWait) {
+            updateCursorAnchor();
+            invalidateInCursor();
+            invalidateChanged(startLine, startLine + 1);
+            ensureSelectionVisible();
+            mEventHandler.hideInsertHandle();
+        }
+        if (!mCursor.isSelected()) {
+            mCursorAnimator.markEndPosAndStart();
+        }
+
+        mLanguage.getAnalyzeManager().delete(start, end, deletedContent);
+        onSelectionChanged(SelectionChangeEvent.CAUSE_TEXT_MODIFICATION);
+        dispatchEvent(new ContentChangeEvent(this, ContentChangeEvent.ACTION_DELETE, start, end, deletedContent));
+    }
+
+    @Override
+    public void beforeModification(Content content) {
+        mCursorAnimator.markStartPos();
+    }
+
+    @Override
+    public void onFormatFail(final Throwable throwable) {
+        post(() -> Toast.makeText(getContext(), throwable.toString(), Toast.LENGTH_SHORT).show());
+        mFormatThread = null;
+    }
+
+    @Override
+    public void onRemove(Content content, ContentLine line) {
+        mLayout.onRemove(content, line);
+    }
+
+    @Override
+    public void onFormatSucceed(CharSequence originalText, final CharSequence newText) {
+        mFormatThread = null;
+        if (originalText == mText) {
+            post(() -> {
+                int line = mCursor.getLeftLine();
+                int column = mCursor.getLeftColumn();
+                mText.replace(0, 0, getLineCount() - 1, mText.getColumnCount(getLineCount() - 1), newText);
+                getScroller().forceFinished(true);
+                mCompletionWindow.hide();
+                setSelectionAround(line, column);
+            });
+        }
+    }
+
+    @Override
+    public void setStyles(final AnalyzeManager sourceManager, Styles styles) {
+        if (sourceManager == mLanguage.getAnalyzeManager()) {
+            Runnable operation = () -> {
+                mStyles = styles;
+                if (mHighlightCurrentBlock) {
+                    mCursorPosition = findCursorBlock();
+                }
+                invalidateHwRenderer();
+                updateTimestamp();
+                invalidate();
+            };
+            if (Looper.getMainLooper().getThread() == Thread.currentThread()) {
+                operation.run();
+            } else {
+                post(operation);
+            }
+        }
+    }
+
+    //-------------------------------------------------------------------------------
+    //-------------------------Inner classes-----------------------------------------
+    //-------------------------------------------------------------------------------
+
+    private class DrawCursorTask {
+
+        float x;
+        float y;
+        int handleType;
+        SelectionHandleStyle.HandleDescriptor descriptor;
+
+        public DrawCursorTask(float x, float y, int handleType, SelectionHandleStyle.HandleDescriptor descriptor) {
+            this.x = x;
+            this.y = y;
+            this.handleType = handleType;
+            this.descriptor = descriptor;
+        }
+
+        void execute(Canvas canvas) {
+            // Follow the thumb
+            if (!descriptor.position.isEmpty()) {
+                if ((mEventHandler.holdInsertHandle() && handleType == SelectionHandleStyle.HANDLE_TYPE_INSERT)
+                        || (mEventHandler.mSelHandleType == EditorTouchEventHandler.SelectionHandle.LEFT && handleType == SelectionHandleStyle.HANDLE_TYPE_LEFT)
+                        || (mEventHandler.mSelHandleType == EditorTouchEventHandler.SelectionHandle.RIGHT && handleType == SelectionHandleStyle.HANDLE_TYPE_RIGHT)) {
+                    x = mEventHandler.mMotionX + (descriptor.alignment != SelectionHandleStyle.ALIGN_CENTER ? descriptor.position.width() : 0) * (descriptor.alignment == SelectionHandleStyle.ALIGN_LEFT ? 1 : -1);
+                    y = mEventHandler.mMotionY - descriptor.position.height() * 2 / 3f;
+                }
+            }
+
+            if (handleType != SelectionHandleStyle.HANDLE_TYPE_UNDEFINED || mCursorBlink.visibility || mEventHandler.holdInsertHandle()) {
+                mRect.top = y - getRowHeight();
+                mRect.bottom = y;
+                mRect.left = x - mInsertSelWidth / 2f;
+                mRect.right = x + mInsertSelWidth / 2f;
+                drawColor(canvas, mColors.getColor(EditorColorScheme.SELECTION_INSERT), mRect);
+            }
+            if (handleType != SelectionHandleStyle.HANDLE_TYPE_UNDEFINED) {
+                mHandleStyle.draw(canvas, handleType, x, y, getRowHeight(), mColors.getColor(EditorColorScheme.SELECTION_HANDLE), descriptor);
+            } else if (descriptor != null) {
+                descriptor.setEmpty();
+            }
+        }
+
+    }
+
+    private final static String COPYRIGHT = "sora-editor\nCopyright (C) Rosemoe roses2020@qq.com\nThis project is distributed under the LGPL v2.1 license";
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/CursorAnimator.java b/editor/src/main/java/io/github/rosemoe/sora/widget/CursorAnimator.java
new file mode 100644
index 000000000..15ebc383d
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/CursorAnimator.java
@@ -0,0 +1,114 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import android.animation.ValueAnimator;
+
+/**
+ * Helper class for cursor animation in editor
+ *
+ * @author Rosemoe
+ */
+class CursorAnimator implements ValueAnimator.AnimatorUpdateListener {
+
+    ValueAnimator animatorX;
+    ValueAnimator animatorY;
+    ValueAnimator animatorBgBottom;
+    ValueAnimator animatorBackground;
+    private final CodeEditor editor;
+    private float startX, startY, startSize, startBottom;
+    private long lastAnimateTime;
+
+    public CursorAnimator(CodeEditor editor) {
+        this.editor = editor;
+        animatorX = new ValueAnimator();
+        animatorY = new ValueAnimator();
+        animatorBackground = new ValueAnimator();
+        animatorBgBottom = new ValueAnimator();
+    }
+
+    public void markStartPos() {
+        var line = editor.getCursor().getLeftLine();
+        float[] pos = editor.mLayout.getCharLayoutOffset(line, editor.getCursor().getLeftColumn());
+        startX = editor.measureTextRegionOffset() + pos[1];
+        startY = pos[0];
+        startSize = editor.mLayout.getRowCountForLine(line) * editor.getRowHeight();
+        startBottom = editor.mLayout.getCharLayoutOffset(line, editor.getText().getColumnCount(line))[0];
+    }
+
+    public boolean isRunning() {
+        return animatorX.isRunning() || animatorY.isRunning() || animatorBackground.isRunning() || animatorBgBottom.isRunning();
+    }
+
+    public void cancel() {
+        animatorX.cancel();
+        animatorY.cancel();
+        animatorBackground.cancel();
+        animatorBgBottom.cancel();
+    }
+
+    public void markEndPosAndStart() {
+        if (!editor.isCursorAnimationEnabled()) {
+            return;
+        }
+        if (isRunning()) {
+            startX = (float) animatorX.getAnimatedValue();
+            startY = (float) animatorY.getAnimatedValue();
+            startSize = (float) animatorBackground.getAnimatedValue();
+            startBottom = (float) animatorBgBottom.getAnimatedValue();
+            cancel();
+        }
+        var duration = 120;
+        if (System.currentTimeMillis() - lastAnimateTime < 100) {
+            return;
+        }
+        var line = editor.getCursor().getLeftLine();
+        animatorX.removeAllUpdateListeners();
+        float[] pos = editor.mLayout.getCharLayoutOffset(editor.getCursor().getLeftLine(), editor.getCursor().getLeftColumn());
+
+        animatorX = ValueAnimator.ofFloat(startX, (pos[1] + editor.measureTextRegionOffset()));
+        animatorY = ValueAnimator.ofFloat(startY, pos[0]);
+        animatorBackground = ValueAnimator.ofFloat(startSize, editor.mLayout.getRowCountForLine(editor.getCursor().getLeftLine()) * editor.getRowHeight());
+        animatorBgBottom = ValueAnimator.ofFloat(startBottom, editor.mLayout.getCharLayoutOffset(line, editor.getText().getColumnCount(line))[0]);
+
+        animatorX.addUpdateListener(this);
+
+        animatorX.setDuration(duration);
+        animatorY.setDuration(duration);
+        animatorBackground.setDuration(duration);
+        animatorBgBottom.setDuration(duration);
+
+        animatorX.start();
+        animatorY.start();
+        animatorBackground.start();
+        animatorBgBottom.start();
+
+        lastAnimateTime = System.currentTimeMillis();
+    }
+
+    @Override
+    public void onAnimationUpdate(ValueAnimator animation) {
+        editor.postInvalidateOnAnimation();
+    }
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/CursorBlink.java b/editor/src/main/java/io/github/rosemoe/sora/widget/CursorBlink.java
new file mode 100644
index 000000000..046e49266
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/CursorBlink.java
@@ -0,0 +1,100 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import io.github.rosemoe.sora.event.EventReceiver;
+import io.github.rosemoe.sora.event.SelectionChangeEvent;
+import io.github.rosemoe.sora.event.Unsubscribe;
+
+/**
+ * This class is used to control cursor visibility
+ *
+ * @author Rose
+ */
+final class CursorBlink implements Runnable, EventReceiver<SelectionChangeEvent> {
+
+    final CodeEditor editor;
+    long lastSelectionModificationTime = 0;
+    int period;
+    public boolean visibility;
+    public boolean valid;
+    private float[] buffer;
+
+    public CursorBlink(CodeEditor editor, int period) {
+        visibility = true;
+        this.editor = editor;
+        this.period = period;
+        editor.subscribeEvent(SelectionChangeEvent.class, this);
+    }
+
+    @Override
+    public void onReceive(SelectionChangeEvent event, Unsubscribe unsubscribe) {
+        onSelectionChanged();
+    }
+
+    public void setPeriod(int period) {
+        this.period = period;
+        if (period <= 0) {
+            visibility = true;
+            valid = false;
+        } else {
+            valid = true;
+        }
+    }
+
+    public void onSelectionChanged() {
+        lastSelectionModificationTime = System.currentTimeMillis();
+        visibility = true;
+    }
+
+    public boolean isSelectionVisible() {
+        return (buffer[0] >= editor.getOffsetY() && buffer[0] - editor.getRowHeight() <= editor.getOffsetY() + editor.getHeight()
+                && buffer[1] >= editor.getOffsetX() && buffer[1] - 100f/* larger than a single character */ <= editor.getOffsetX() + editor.getWidth());
+    }
+
+    @Override
+    public void run() {
+        if (valid && period > 0) {
+            if (System.currentTimeMillis() - lastSelectionModificationTime >= period * 2L) {
+                visibility = !visibility;
+                buffer = editor.mLayout.getCharLayoutOffset(editor.getCursor().getLeftLine(), editor.getCursor().getLeftColumn(), buffer);
+                if (!editor.getCursor().isSelected() && isSelectionVisible()) {
+                    // Invalidate dirty region
+                    var delta = (int)(editor.getDpUnit() * 10);
+                    var l = (int)buffer[1] - delta;
+                    var r = l + delta * 2;
+                    var b = (int)buffer[0] + delta;
+                    var t = b - delta * 2;
+                    editor.postInvalidate(l, t, r, b);
+                }
+            } else {
+                visibility = true;
+            }
+            editor.postDelayed(this, period);
+        } else {
+            visibility = true;
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/DirectAccessProps.java b/editor/src/main/java/io/github/rosemoe/sora/widget/DirectAccessProps.java
new file mode 100644
index 000000000..7e9742cab
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/DirectAccessProps.java
@@ -0,0 +1,146 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.ExtractedTextRequest;
+import android.widget.OverScroller;
+
+import androidx.annotation.NonNull;
+
+import java.io.Serializable;
+
+/**
+ * Direct-access properties.
+ *
+ * This object saves some feature settings of editor. These features are not accessed unless the user
+ * does something that requires to check the state of the feature. So we save them here by public fields
+ * so that you can modify them easily and do not have to call so many methods.
+ */
+public class DirectAccessProps implements Serializable {
+
+    /**
+     * If set to be true, the editor will delete the whole line if the current line is empty (only tabs or spaces)
+     * when the users press the DELETE key.
+     *
+     * Default value is {@code true}
+     */
+    public boolean deleteEmptyLineFast = true;
+
+    /**
+     * Delete multiple space at a time when the user press the DELETE key.
+     * This only takes effect when selection is in leading spaces.
+     *
+     * Default Value: {@code 1}  -> The editor will always delete only 1 space.
+     * Special Value: {@code -1} -> Follow tab size
+     */
+    public int deleteMultiSpaces = 1;
+
+    /**
+     * Set to {@code false} if you don't want the editor to go fullscreen on devices with smaller screen size.
+     * Otherwise, set to {@code true}
+     * <p>
+     * Default value is {@code false}
+     */
+    public boolean allowFullscreen = false;
+
+    /**
+     * Control whether auto-completes for symbol pairs.
+     *
+     * Such as automatically adding a ')' when '(' is entered
+     */
+    public boolean symbolPairAutoCompletion = true;
+
+    /**
+     * Show auto-completion even when there is composing text set by the IME in editor.
+     *
+     * Note: composing text is usually a small piece of text you are typing. It is displayed with an
+     * underline in editor.
+     * This is useful when the user uses an input method that does not support the attitude {@link EditorInfo#TYPE_TEXT_FLAG_NO_SUGGESTIONS}.
+     * When this switch is set to false, the editor will not provide auto-completion
+     * when there is any composing text in editor.
+     */
+    public boolean autoCompletionOnComposing = true;
+
+    /**
+     * Set whether auto indent should be executed when user enters
+     * a NEWLINE.
+     *
+     * Enabling this will automatically copy the leading spaces on this line to the new line.
+     */
+    public boolean autoIndent = true;
+
+    /**
+     * Define symbol pairs for any language,
+     * Override language settings.
+     * <p>
+     * Use {@link SymbolPairMatch.Replacement#NO_REPLACEMENT} to force no completion for a character
+     */
+    @NonNull
+    public final SymbolPairMatch overrideSymbolPairs = new SymbolPairMatch();
+
+    /**
+     * Disallow suggestions from keyboard forcibly by preventing
+     * {@link android.view.inputmethod.InputConnection#setComposingText(CharSequence, int)} and
+     * {@link android.view.inputmethod.InputConnection#setComposingRegion(int, int)} taking effects.
+     * <p>
+     * This may not be always good for all IMEs, as keyboards' strategy varies.
+     */
+    public boolean disallowSuggestions = false;
+
+    /**
+     * Max text length that can be extracted by {@link android.view.inputmethod.InputConnection#getExtractedText(ExtractedTextRequest, int)}
+     * and other methods related to text content.
+     * <p>
+     * Usually you need to make it big enough so that the IME does it work for its symbol pair match (at least
+     * some Chinese keyboards need it).
+     * Text exceeds the limit will be cut, but editor will make sure the selection region is in the extracted text.
+     * Some IMEs ignore the {@link android.view.inputmethod.ExtractedText#startOffset} and if the length exceeds this
+     * limit, they may not work properly.
+     * <p>
+     * Set it to 0 to send no text to IME.
+     */
+    public int maxIPCTextLength = 500000;
+
+    /**
+     * Whether over scroll is permitted.
+     * When over scroll is enabled, the user will be able to scroll out of displaying
+     * bounds if the user scroll fast enough.
+     * This is implemented by {@link OverScroller#fling(int, int, int, int, int, int, int, int, int, int)}
+     */
+    public boolean overScrollEnabled = false;
+
+    /**
+     * Allow fling scroll
+     */
+    public boolean scrollFling = true;
+
+    /**
+     * If the two completion requests are sent within this time, the completion will not
+     * show.
+     */
+    public long cancelCompletionNs = 70 * 1000000;
+
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorInputConnection.java b/editor/src/main/java/io/github/rosemoe/sora/widget/EditorInputConnection.java
old mode 100755
new mode 100644
similarity index 78%
rename from app/src/main/java/io/github/rosemoe/editor/widget/EditorInputConnection.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/EditorInputConnection.java
index 45fa02c0d..0411d9342
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorInputConnection.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/EditorInputConnection.java
@@ -1,33 +1,44 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget;
 
 import android.os.SystemClock;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.TextUtils;
+import android.util.Log;
 import android.view.KeyCharacterMap;
 import android.view.KeyEvent;
 import android.view.inputmethod.BaseInputConnection;
 import android.view.inputmethod.ExtractedText;
 import android.view.inputmethod.ExtractedTextRequest;
 
-import io.github.rosemoe.editor.text.CharPosition;
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.Cursor;
+import io.github.rosemoe.sora.event.SelectionChangeEvent;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.Cursor;
+import io.github.rosemoe.sora.widget.component.EditorAutoCompletion;
 
 /**
  * Connection between input method and editor
@@ -37,7 +48,6 @@ import io.github.rosemoe.editor.text.Cursor;
 class EditorInputConnection extends BaseInputConnection {
 
     private final static String LOG_TAG = "EditorInputConnection";
-    final static int TEXT_LENGTH_LIMIT = 10000000;
 
     private final CodeEditor mEditor;
     protected int mComposingLine = -1;
@@ -57,8 +67,6 @@ class EditorInputConnection extends BaseInputConnection {
     }
 
     protected void invalid() {
-        //Logs.log("Connection is set to invalid");
-        //Logs.dumpStack();
         mInvalid = true;
         mComposingEnd = mComposingStart = mComposingLine = -1;
         mEditor.invalidate();
@@ -68,7 +76,6 @@ class EditorInputConnection extends BaseInputConnection {
      * Reset the state of this connection
      */
     protected void reset() {
-        //Logs.log("Connection reset");
         mComposingEnd = mComposingStart = mComposingLine = -1;
         mInvalid = false;
     }
@@ -85,7 +92,6 @@ class EditorInputConnection extends BaseInputConnection {
 
     @Override
     public synchronized void closeConnection() {
-        //Logs.log("close connection");
         super.closeConnection();
         Content content = mEditor.getText();
         while (content.isInBatchEdit()) {
@@ -119,9 +125,11 @@ class EditorInputConnection extends BaseInputConnection {
         if (end < start) {
             start = end = 0;
         }
+        if (end - start > mEditor.getProps().maxIPCTextLength) {
+            end = start + mEditor.getProps().maxIPCTextLength;
+        }
         Content sub = (Content) origin.subSequence(start, end);
         if (flags == GET_TEXT_WITH_STYLES) {
-            sub.beginStreamCharGetting(0);
             SpannableStringBuilder text = new SpannableStringBuilder(sub);
             // Apply composing span
             if (mComposingLine != -1) {
@@ -156,33 +164,28 @@ class EditorInputConnection extends BaseInputConnection {
         try {
             return getTextRegionInternal(start, end, flags);
         } catch (IndexOutOfBoundsException e) {
+            Log.w(LOG_TAG, "Failed to get text region for IME", e);
             return "";
         }
     }
 
     @Override
     public CharSequence getSelectedText(int flags) {
-        //Logs.log("getSelectedText()");
         //This text should be limited because when the user try to select all text
         //it can be quite large text and costs time, which will finally cause ANR
         int left = getCursor().getLeft();
         int right = getCursor().getRight();
-        if (right - left > TEXT_LENGTH_LIMIT) {
-            right = left + TEXT_LENGTH_LIMIT;
-        }
         return left == right ? null : getTextRegion(left, right, flags);
     }
 
     @Override
     public CharSequence getTextBeforeCursor(int length, int flags) {
-        //Logs.log("getTextBeforeCursor()");
         int start = getCursor().getLeft();
         return getTextRegion(start - length, start, flags);
     }
 
     @Override
     public CharSequence getTextAfterCursor(int length, int flags) {
-        //Logs.log("getTextAfterCursor()");
         int end = getCursor().getRight();
         return getTextRegion(end, end + length, flags);
     }
@@ -222,20 +225,34 @@ class EditorInputConnection extends BaseInputConnection {
         deleteComposingText();
         // Replace text
         SymbolPairMatch.Replacement replacement = null;
-        if (text.length() == 1 && mEditor.isSymbolCompletionEnabled()) {
+        if (text.length() == 1 && mEditor.getProps().symbolPairAutoCompletion) {
             replacement = mEditor.mLanguageSymbolPairs.getCompletion(text.charAt(0));
         }
         // newCursorPosition ignored
         // Call onCommitText() can make auto indent and delete text selected automatically
-        if (replacement == null || replacement == SymbolPairMatch.Replacement.NO_REPLACEMENT) {
-            getCursor().onCommitText(text, applyAutoIndent);
+        if (replacement == null || replacement == SymbolPairMatch.Replacement.NO_REPLACEMENT
+                || (replacement.shouldNotDoReplace(mEditor.getText()) && replacement.notHasAutoSurroundPair())) {
+            mEditor.commitText(text, applyAutoIndent);
         } else {
-            getCursor().onCommitText(replacement.text, applyAutoIndent);
-            int delta = (replacement.text.length() - replacement.selection);
-            if (delta != 0) {
-                int newSel = Math.max(getCursor().getLeft() - delta, 0);
-                CharPosition charPosition = getCursor().getIndexer().getCharPosition(newSel);
-                mEditor.setSelection(charPosition.line, charPosition.column);
+            String[] autoSurroundPair;
+            if (getCursor().isSelected() && (autoSurroundPair = replacement.getAutoSurroundPair()) != null) {
+                mEditor.getText().beginBatchEdit();
+                //insert left
+                mEditor.getText().insert(getCursor().getLeftLine(), getCursor().getLeftColumn(), autoSurroundPair[0]);
+                //insert right
+                mEditor.getText().insert(getCursor().getRightLine(), getCursor().getRightColumn(), autoSurroundPair[1]);
+                mEditor.getText().endBatchEdit();
+                //cancel selected
+                mEditor.setSelection(getCursor().getLeftLine(), getCursor().getLeftColumn() + autoSurroundPair[0].length()-1, SelectionChangeEvent.CAUSE_TEXT_MODIFICATION);
+
+            } else {
+                mEditor.commitText(replacement.text, applyAutoIndent);
+                int delta = (replacement.text.length() - replacement.selection);
+                if (delta != 0) {
+                    int newSel = Math.max(getCursor().getLeft() - delta, 0);
+                    CharPosition charPosition = getCursor().getIndexer().getCharPosition(newSel);
+                    mEditor.setSelection(charPosition.line, charPosition.column, SelectionChangeEvent.CAUSE_TEXT_MODIFICATION);
+                }
             }
         }
     }
@@ -257,7 +274,6 @@ class EditorInputConnection extends BaseInputConnection {
 
     @Override
     public boolean deleteSurroundingText(int beforeLength, int afterLength) {
-        //Logs.log("deleteSurroundingText: before = " + beforeLength + ", after = " + afterLength);
         if (!mEditor.isEditable() || mInvalid) {
             return false;
         }
@@ -338,13 +354,11 @@ class EditorInputConnection extends BaseInputConnection {
 
     @Override
     public synchronized boolean beginBatchEdit() {
-        //Logs.log("beginBatchEdit()");
         return mEditor.getText().beginBatchEdit();
     }
 
     @Override
     public synchronized boolean endBatchEdit() {
-        //Logs.log("endBatchEdit()");
         boolean inBatch = mEditor.getText().endBatchEdit();
         if (!inBatch) {
             mEditor.updateSelection();
@@ -355,35 +369,40 @@ class EditorInputConnection extends BaseInputConnection {
     private void deleteSelected() {
         if (getCursor().isSelected()) {
             // Delete selected text
-            getCursor().onDeleteKeyPressed();
+            mEditor.deleteText();
         }
     }
 
+    private boolean shouldRejectComposing() {
+        return mEditor.getComponent(EditorAutoCompletion.class).shouldRejectComposing();
+    }
+
     @Override
     public boolean setComposingText(CharSequence text, int newCursorPosition) {
-        if (!mEditor.isEditable() || mInvalid) {
+        if (!mEditor.isEditable() || mInvalid || shouldRejectComposing()|| mEditor.getProps().disallowSuggestions) {
             return false;
         }
         if (TextUtils.indexOf(text, '\n') != -1) {
             return false;
         }
-		
         if (mComposingLine == -1) {
             // Create composing info
             deleteSelected();
             mComposingLine = getCursor().getLeftLine();
             mComposingStart = getCursor().getLeftColumn();
             mComposingEnd = mComposingStart + text.length();
-            getCursor().onCommitText(text);
+            mEditor.commitText(text);
         } else {
             // Already have composing text
             // Delete first
+            beginBatchEdit();
             if (mComposingStart != mComposingEnd) {
                 mEditor.getText().delete(mComposingLine, mComposingStart, mComposingLine, mComposingEnd);
             }
             // Reset range
             mComposingEnd = mComposingStart + text.length();
             mEditor.getText().insert(mComposingLine, mComposingStart, text);
+            endBatchEdit();
         }
         if (text.length() == 0) {
             finishComposingText();
@@ -394,6 +413,7 @@ class EditorInputConnection extends BaseInputConnection {
 
     @Override
     public boolean finishComposingText() {
+        //Logs.log("Finish composing text");
         if (!mEditor.isEditable() || mInvalid) {
             return false;
         }
@@ -414,7 +434,7 @@ class EditorInputConnection extends BaseInputConnection {
 
     @Override
     public boolean setSelection(int start, int end) {
-        if (!mEditor.isEditable() || mInvalid) {
+        if (!mEditor.isEditable() || mInvalid || mComposingLine != -1) {
             return false;
         }
         start = getWrappedIndex(start);
@@ -424,19 +444,20 @@ class EditorInputConnection extends BaseInputConnection {
             start = end;
             end = tmp;
         }
-        mEditor.getAutoCompleteWindow().hide();
+        if (start == getCursor().getLeft() && end == getCursor().getRight()) {
+            return true;
+        }
+        mEditor.getComponent(EditorAutoCompletion.class).hide();
         Content content = mEditor.getText();
         CharPosition startPos = content.getIndexer().getCharPosition(start);
         CharPosition endPos = content.getIndexer().getCharPosition(end);
-        mEditor.setSelectionRegion(startPos.line, startPos.column, endPos.line, endPos.column, false);
+        mEditor.setSelectionRegion(startPos.line, startPos.column, endPos.line, endPos.column, false, SelectionChangeEvent.CAUSE_IME);
         return true;
     }
 
     @Override
     public boolean setComposingRegion(int start, int end) {
-        //Logs.log("set composing region:" + start + ".." + end);
-        //Log.d(LOG_TAG, "set composing region:" + start + ".." + end);
-        if (!mEditor.isEditable() || mInvalid) {
+        if (!mEditor.isEditable() || mInvalid || shouldRejectComposing() || mEditor.getProps().disallowSuggestions) {
             return false;
         }
         try {
@@ -463,6 +484,7 @@ class EditorInputConnection extends BaseInputConnection {
             mComposingEnd = endPos.column;
             mEditor.invalidate();
         } catch (IndexOutOfBoundsException e) {
+            Log.w(LOG_TAG, "set composing region for IME failed", e);
             return false;
         }
         return true;
@@ -477,7 +499,7 @@ class EditorInputConnection extends BaseInputConnection {
             case android.R.id.cut:
                 mEditor.copyText();
                 if (getCursor().isSelected()) {
-                    getCursor().onDeleteKeyPressed();
+                    mEditor.deleteText();
                 }
                 return true;
             case android.R.id.paste:
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorSearcher.java b/editor/src/main/java/io/github/rosemoe/sora/widget/EditorSearcher.java
old mode 100755
new mode 100644
similarity index 78%
rename from app/src/main/java/io/github/rosemoe/editor/widget/EditorSearcher.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/EditorSearcher.java
index 007a0fef3..21de11310
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorSearcher.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/EditorSearcher.java
@@ -1,25 +1,33 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget;
 
 import android.app.ProgressDialog;
 import android.widget.Toast;
 
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.Cursor;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.Cursor;
 
 /**
  * Search text in editor
@@ -58,7 +66,7 @@ public class EditorSearcher {
         if (cursor.isSelected()) {
             String selectedText = text.subContent(cursor.getLeftLine(), cursor.getLeftColumn(), cursor.getRightLine(), cursor.getRightColumn()).toString();
             if (selectedText.equals(mSearchText)) {
-                cursor.onCommitText(newText);
+                mEditor.commitText(newText);
                 mEditor.hideAutoCompleteWindow();
                 gotoNext(false);
                 return true;
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorTouchEventHandler.java b/editor/src/main/java/io/github/rosemoe/sora/widget/EditorTouchEventHandler.java
old mode 100755
new mode 100644
similarity index 62%
rename from app/src/main/java/io/github/rosemoe/editor/widget/EditorTouchEventHandler.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/EditorTouchEventHandler.java
index 3921dbec7..04ea966dd
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorTouchEventHandler.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/EditorTouchEventHandler.java
@@ -1,19 +1,27 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget;
 
 import android.content.res.Resources;
 import android.graphics.RectF;
@@ -23,7 +31,15 @@ import android.view.MotionEvent;
 import android.view.ScaleGestureDetector;
 import android.widget.OverScroller;
 
-import io.github.rosemoe.editor.util.IntPair;
+import io.github.rosemoe.sora.event.ClickEvent;
+import io.github.rosemoe.sora.event.HandleStateChangeEvent;
+import io.github.rosemoe.sora.event.LongPressEvent;
+import io.github.rosemoe.sora.event.ScrollEvent;
+import io.github.rosemoe.sora.event.SelectionChangeEvent;
+import io.github.rosemoe.sora.text.ICUUtils;
+import io.github.rosemoe.sora.util.IntPair;
+import io.github.rosemoe.sora.widget.component.Magnifier;
+import io.github.rosemoe.sora.widget.style.SelectionHandleStyle;
 
 /**
  * Handles touch events of editor
@@ -31,31 +47,30 @@ import io.github.rosemoe.editor.util.IntPair;
  * @author Rose
  */
 @SuppressWarnings("CanBeFinal")
-final class EditorTouchEventHandler implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener, ScaleGestureDetector.OnScaleGestureListener {
+public final class EditorTouchEventHandler implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener, ScaleGestureDetector.OnScaleGestureListener {
 
     private final static int HIDE_DELAY = 3000;
-    private final static int SELECTION_HANDLE_RESIZE_DELAY = 10;
+    private final static int SELECTION_HANDLE_RESIZE_DELAY = 180;
     private final static int HIDE_DELAY_HANDLE = 5000;
-    private static final long INTERACTION_END_DELAY = 100;
+    private static final long INTERACTION_END_DELAY = 250;
     private static final String TAG = "EditorTouchEventHandler";
     private final CodeEditor mEditor;
     private final OverScroller mScroller;
-    protected boolean topOrBottom; //true for bottom
-    protected boolean leftOrRight; //true for right
+    boolean topOrBottom; //true for bottom
+    boolean leftOrRight; //true for right
     boolean isScaling = false;
     float maxSize, minSize;
     private long mLastScroll = 0;
     private long mLastSetSelection = 0;
-    private long mLastTouchedSelectionHandle = 0;
-    private long mLastInteraction = 0;
     private boolean mHoldingScrollbarVertical = false;
     private boolean mHoldingScrollbarHorizontal = false;
     private boolean mHoldingInsertHandle = false;
     private float downY = 0;
     private float downX = 0;
     private SelectionHandle insert = null, left = null, right = null;
-    private int mSelHandleType = -1;
+    int mSelHandleType = -1;
     private int mTouchedHandleType = -1;
+    Magnifier mMagnifier;
 
     private final static int LEFT_EDGE = 1;
     private final static int RIGHT_EDGE = 1 << 1;
@@ -64,9 +79,10 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
     private float edgeFieldSize;
     private int mEdgeFlags;
     private MotionEvent mThumb;
+    float mMotionX, mMotionY;
 
     /**
-     * Create a event handler for the given editor
+     * Create an event handler for the given editor
      *
      * @param editor Host editor
      */
@@ -75,6 +91,7 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         mScroller = new OverScroller(editor.getContext());
         maxSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 32, Resources.getSystem().getDisplayMetrics());
         minSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 6, Resources.getSystem().getDisplayMetrics());
+        mMagnifier = new Magnifier(editor);
     }
 
     /**
@@ -87,30 +104,8 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         return Character.isJavaIdentifierPart(ch);
     }
 
-    /**
-     * Checks whether the provided character is a whitespace
-     *
-     * @param c the char to check
-     * @return Whether the provided character is a whitespace
-     */
-    private boolean isWhitespace(char c) {
-        return (c == '\t' || c == ' ' || c == '\f' || c == '\n' || c == '\r');
-    }
-
-    /**
-     * Handles the selected text click event
-     *
-     * @param e      the MotionEvent
-     * @param line   line number index
-     * @param column column index in line
-     */
-    private void handleSelectedTextClick(MotionEvent e, int line, int column) {
-		boolean isShowing1 = mEditor.getTextActionPresenter() instanceof EditorTextActionWindow && ((EditorTextActionWindow) mEditor.getTextActionPresenter()).isShowing();
-        boolean isShowing2 = mEditor.getTextActionPresenter() instanceof TextActionPopupWindow && ((TextActionPopupWindow) mEditor.getTextActionPresenter()).isShowing();
-        char text = mEditor.getText().charAt(line, column);
-        if (isWhitespace(text) || isShowing1 || isShowing2)
-            mEditor.setSelection(line, column);
-        else mEditor.getTextActionPresenter().onSelectedTextClicked(e);
+    public boolean hasAnyHeldHandle() {
+        return holdInsertHandle() || mSelHandleType != -1;
     }
 
     /**
@@ -166,18 +161,7 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
      * @return Whether to draw
      */
     public boolean shouldDrawInsertHandle() {
-        return (System.currentTimeMillis() - mLastSetSelection < HIDE_DELAY || mHoldingInsertHandle) && checkActionWindow();
-    }
-
-    /**
-     * Check whether the text action window is shown
-     */
-    private boolean checkActionWindow() {
-        CodeEditor.EditorTextActionPresenter presenter = mEditor.mTextActionPresenter;
-        if (presenter instanceof EditorTextActionWindow) {
-            return !((EditorTextActionWindow) presenter).isShowing();
-        }
-        return true;
+        return (System.currentTimeMillis() - mLastSetSelection < HIDE_DELAY || mHoldingInsertHandle);
     }
 
     /**
@@ -216,63 +200,13 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         mEditor.postDelayed(new InvalidateNotifier(), HIDE_DELAY);
     }
 
-    /**
-     * Notify the editor later to resize touched selection handle to normal size
-     */
-    public void notifyTouchedSelectionHandlerLater() {
-        mLastTouchedSelectionHandle = System.currentTimeMillis();
-        class InvalidateNotifier implements Runnable {
-
-            @Override
-            public void run() {
-                if (System.currentTimeMillis() - mLastTouchedSelectionHandle >= SELECTION_HANDLE_RESIZE_DELAY) {
-                    mEditor.invalidate();
-                    mEditor.onEndTextSelect();
-                }
-            }
-        }
-        mEditor.postDelayed(new InvalidateNotifier(), SELECTION_HANDLE_RESIZE_DELAY);
-    }
-
-    private int preciousX = 0;
-    private int preciousY = 0;
-
-    public void notifyGestureInteractionEnd(int type) {
-        mLastInteraction = System.currentTimeMillis();
-        class InvalidateNotifier implements Runnable {
-            @Override
-            public void run() {
-                if (type == TextComposeBasePopup.SCROLL) {
-                    int x = mScroller.getCurrX();
-                    int y = mScroller.getCurrY();
-                    if (x - preciousX == 0 && y - preciousY == 0) {
-                        mEditor.invalidate();
-                        mEditor.onEndGestureInteraction();
-                        preciousX = 0;
-                        preciousY = 0;
-                        return;
-                    }
-                    preciousX = x;
-                    preciousY = y;
-                    mEditor.postDelayed(this, INTERACTION_END_DELAY);
-                } else if (System.currentTimeMillis() - mLastInteraction >= INTERACTION_END_DELAY) {
-                    mEditor.invalidate();
-                    mEditor.onEndGestureInteraction();
-                }
-            }
-
-        }
-        mEditor.postDelayed(new InvalidateNotifier(), INTERACTION_END_DELAY);
-    }
-
-
     /**
      * Called by editor
      * Whether this class is handling motions by user
      *
      * @return Whether handling
      */
-    protected boolean handlingMotions() {
+    public boolean handlingMotions() {
         return holdHorizontalScrollBar() || holdVerticalScrollBar() || holdInsertHandle() || mSelHandleType != -1;
     }
 
@@ -281,17 +215,32 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
      *
      * @return Scroller using
      */
-    protected OverScroller getScroller() {
+    public OverScroller getScroller() {
         return mScroller;
     }
 
     /**
      * Reset scroll state
      */
-    protected void reset() {
+    public void reset() {
         mScroller.startScroll(0, 0, 0, 0, 0);
     }
 
+    public void updateMagnifier(MotionEvent e) {
+        if (mEdgeFlags != 0) {
+            dismissMagnifier();
+            return;
+        }
+        if (mMagnifier.isEnabled()) {
+            var height = Math.max(Math.max(mEditor.getInsertHandleDescriptor().position.height(), mEditor.getLeftHandleDescriptor().position.height()), mEditor.getRightHandleDescriptor().position.height());
+            mMagnifier.show((int) e.getX(), (int) (e.getY() - height / 2 - mEditor.getRowHeight()));
+        }
+    }
+
+    public void dismissMagnifier() {
+        mMagnifier.dismiss();
+    }
+
     /**
      * Handle events apart from detectors
      *
@@ -300,22 +249,24 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
      */
     public boolean onTouchEvent(MotionEvent e) {
         if (edgeFieldSize == 0) {
-            edgeFieldSize = mEditor.getDpUnit() * 25;
+            edgeFieldSize = mEditor.getDpUnit() * 18;
         }
+        mMotionY = e.getY();
+        mMotionX = e.getX();
         switch (e.getAction()) {
-            case MotionEvent.ACTION_DOWN:
+            case MotionEvent.ACTION_DOWN: {
                 mHoldingScrollbarVertical = mHoldingScrollbarHorizontal = false;
                 RectF rect = mEditor.getVerticalScrollBarRect();
                 if (rect.contains(e.getX(), e.getY())) {
                     mHoldingScrollbarVertical = true;
                     downY = e.getY();
-                    mEditor.hideAutoCompleteWindow(); mEditor.hideDiagnosticWindow();
+                    mEditor.hideAutoCompleteWindow();
                 }
                 rect = mEditor.getHorizontalScrollBarRect();
                 if (rect.contains(e.getX(), e.getY())) {
                     mHoldingScrollbarHorizontal = true;
                     downX = e.getX();
-                    mEditor.hideAutoCompleteWindow(); mEditor.hideDiagnosticWindow();
+                    mEditor.hideAutoCompleteWindow();
                 }
                 if (mHoldingScrollbarVertical && mHoldingScrollbarHorizontal) {
                     mHoldingScrollbarHorizontal = false;
@@ -323,15 +274,16 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                 if (mHoldingScrollbarVertical || mHoldingScrollbarHorizontal) {
                     mEditor.invalidate();
                 }
-                if (shouldDrawInsertHandle() && mEditor.getInsertHandleRect().contains(e.getX(), e.getY())) {
+                if (shouldDrawInsertHandle() && mEditor.getInsertHandleDescriptor().position.contains(e.getX(), e.getY())) {
                     mHoldingInsertHandle = true;
                     downY = e.getY();
                     downX = e.getX();
-
+                    updateMagnifier(e);
                     insert = new SelectionHandle(SelectionHandle.BOTH);
+                    dispatchHandle(HandleStateChangeEvent.HANDLE_TYPE_INSERT, true);
                 }
-                boolean left = mEditor.getLeftHandleRect().contains(e.getX(), e.getY());
-                boolean right = mEditor.getRightHandleRect().contains(e.getX(), e.getY());
+                boolean left = mEditor.getLeftHandleDescriptor().position.contains(e.getX(), e.getY());
+                boolean right = mEditor.getRightHandleDescriptor().position.contains(e.getX(), e.getY());
                 if (left || right) {
                     if (left) {
                         mSelHandleType = SelectionHandle.LEFT;
@@ -340,15 +292,17 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                         mSelHandleType = SelectionHandle.RIGHT;
                         mTouchedHandleType = SelectionHandle.RIGHT;
                     }
+                    dispatchHandle(mSelHandleType, true);
                     downY = e.getY();
                     downX = e.getX();
+                    updateMagnifier(e);
 
                     this.left = new SelectionHandle(SelectionHandle.LEFT);
                     this.right = new SelectionHandle(SelectionHandle.RIGHT);
-
                 }
                 return true;
-            case MotionEvent.ACTION_MOVE:
+            }
+            case MotionEvent.ACTION_MOVE: {
                 if (mHoldingScrollbarVertical) {
                     float movedDis = e.getY() - downY;
                     downY = e.getY();
@@ -365,7 +319,16 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                     scrollBy(dx, 0);
                     return true;
                 }
-                return handleSelectionChange(e);
+                if (handleSelectionChange(e)) {
+                    updateMagnifier(e);
+                    if (mTouchedHandleType != -1 || holdInsertHandle()) {
+                        mEditor.invalidate();
+                    }
+                    return true;
+                } else {
+                    return false;
+                }
+            }
             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL:
                 if (mHoldingScrollbarVertical) {
@@ -384,20 +347,28 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                     mHoldingInsertHandle = false;
                     mEditor.invalidate();
                     notifyLater();
+                    dispatchHandle(HandleStateChangeEvent.HANDLE_TYPE_INSERT, false);
                 }
-                mSelHandleType = -1;
-
+                if (mSelHandleType != -1) {
+                    dispatchHandle(mSelHandleType, false);
+                    mSelHandleType = -1;
+                }
+                mEditor.invalidate();
                 // check touch event is related to text selection or not
                 if (mTouchedHandleType > -1) {
                     mTouchedHandleType = -1;
-                    notifyTouchedSelectionHandlerLater();
                 }
                 stopEdgeScroll();
+                dismissMagnifier();
                 break;
         }
         return false;
     }
 
+    private void dispatchHandle(int type, boolean held) {
+        mEditor.dispatchEvent(new HandleStateChangeEvent(mEditor, type, held));
+    }
+
     private boolean handleSelectionChange(MotionEvent e) {
         if (mHoldingInsertHandle) {
             insert.applyPosition(e);
@@ -449,7 +420,7 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         return flags;
     }
 
-    private void scrollIfThumbReachesEdge(MotionEvent e) {
+    public void scrollIfThumbReachesEdge(MotionEvent e) {
         int flag = computeEdgeFlags(e.getX(), e.getY());
         int initialDelta = (int) (8 * mEditor.getDpUnit());
         if (flag != 0 && mEdgeFlags == 0) {
@@ -468,34 +439,39 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         return (a < 0 && b < 0) || (a > 0 && b > 0);
     }
 
-    private void stopEdgeScroll() {
+    public void stopEdgeScroll() {
         mEdgeFlags = 0;
     }
 
-    protected void scrollBy(float distanceX, float distanceY) {
-        if (mEditor.getTextActionPresenter() != null) {
-            if (mEditor.getTextActionPresenter() instanceof TextActionPopupWindow) {
-                mEditor.getTextActionPresenter().onUpdate(TextActionPopupWindow.SCROLL);
-            } else {
-                mEditor.getTextActionPresenter().onUpdate();
-            }
-        }
+    public void scrollBy(float distanceX, float distanceY) {
+        scrollBy(distanceX, distanceY, false);
+    }
+
+    public void scrollBy(float distanceX, float distanceY, boolean smooth) {
         mEditor.hideAutoCompleteWindow();
-        mEditor.hideDiagnosticWindow();
         int endX = mScroller.getCurrX() + (int) distanceX;
         int endY = mScroller.getCurrY() + (int) distanceY;
         endX = Math.max(endX, 0);
         endY = Math.max(endY, 0);
         endY = Math.min(endY, mEditor.getScrollMaxY());
         endX = Math.min(endX, mEditor.getScrollMaxX());
-        mScroller.startScroll(mScroller.getCurrX(),
-                mScroller.getCurrY(),
-                endX - mScroller.getCurrX(),
-                endY - mScroller.getCurrY(), 0);
+        mEditor.dispatchEvent(new ScrollEvent(mEditor, mScroller.getCurrX(),
+                mScroller.getCurrY(), endX, endY, ScrollEvent.CAUSE_USER_DRAG));
+        if (smooth) {
+            mScroller.startScroll(mScroller.getCurrX(),
+                    mScroller.getCurrY(),
+                    endX - mScroller.getCurrX(),
+                    endY - mScroller.getCurrY());
+        } else {
+            mScroller.startScroll(mScroller.getCurrX(),
+                    mScroller.getCurrY(),
+                    endX - mScroller.getCurrX(),
+                    endY - mScroller.getCurrY(), 0);
+        }
         mEditor.invalidate();
     }
 
-    protected int getTouchedHandleType() {
+    public int getTouchedHandleType() {
         return mTouchedHandleType;
     }
 
@@ -506,92 +482,58 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         long res = mEditor.getPointPositionOnScreen(e.getX(), e.getY());
         int line = IntPair.getFirst(res);
         int column = IntPair.getSecond(res);
-        if (mEditor.getCursor().isSelected() && mEditor.getCursor().isInSelectedRegion(line, column) && !mEditor.isOverMaxY(e.getY())) {
-            handleSelectedTextClick(e, line, column);
-        } else {
-            notifyLater();
-            int oldLine = mEditor.getCursor().getLeftLine();
-            int oldColumn = mEditor.getCursor().getLeftColumn();
-            if (line == oldLine && column == oldColumn) {
-                if (mEditor.mTextActionPresenter instanceof EditorTextActionWindow) {
-                    EditorTextActionWindow window = (EditorTextActionWindow) mEditor.mTextActionPresenter;
-                    if (window.isShowing()) {
-                        window.hide();
-                    } else {
-                        window.onBeginTextSelect();
-                        window.onSelectedTextClicked(e);
-                    }
-                }
+        mEditor.performClick();
+        if (mEditor.dispatchEvent(new ClickEvent(mEditor, mEditor.getText().getIndexer().getCharPosition(line, column), e))) {
+            return true;
+        }
+        notifyLater();
+        mEditor.setSelection(line, column, SelectionChangeEvent.CAUSE_TAP);
+        mEditor.hideAutoCompleteWindow();
+        return true;
+    }
+
+    private void selectWord(int line, int column) {
+        // Find word edges
+        int startLine = line, endLine = line;
+        var lineObj = mEditor.getText().getLine(line);
+        long edges = ICUUtils.getWordEdges(lineObj, column);
+        int startColumn = IntPair.getFirst(edges);
+        int endColumn = IntPair.getSecond(edges);
+        if (startColumn == endColumn) {
+            if (startColumn > 0) {
+                startColumn--;
+            } else if (endColumn < lineObj.length()) {
+                endColumn++;
             } else {
-                mEditor.setSelection(line, column);
-                mEditor.hideAutoCompleteWindow();
-                mEditor.hideDiagnosticWindow();
+                if (line > 0) {
+                    int lastColumn = mEditor.getText().getColumnCount(line - 1);
+                    startLine = line - 1;
+                    startColumn = lastColumn;
+                } else if (line < mEditor.getLineCount() - 1) {
+                    endLine = line + 1;
+                    endColumn = 0;
+                }
             }
         }
-        mEditor.performClick();
-        return true;
+        mEditor.setSelectionRegion(startLine, startColumn, endLine, endColumn, SelectionChangeEvent.CAUSE_LONG_PRESS);
     }
 
     @Override
     public void onLongPress(MotionEvent e) {
-        if (mEditor.mTextActionPresenter instanceof TextActionPopupWindow) {
-            handleLongPressForModifiedTextAction(e);
-            return;
-        }
         if (mEditor.getCursor().isSelected() || e.getPointerCount() != 1) {
             return;
         }
         long res = mEditor.getPointPositionOnScreen(e.getX(), e.getY());
         int line = IntPair.getFirst(res);
         int column = IntPair.getSecond(res);
-        //Find word edges
-        int startLine = line, endLine = line;
-        int startColumn = column;
-        while (startColumn > 0 && isIdentifierPart(mEditor.getText().charAt(line, startColumn - 1))) {
-            startColumn--;
-        }
-        int maxColumn = mEditor.getText().getColumnCount(line);
-        int endColumn = column;
-        while (endColumn < maxColumn && isIdentifierPart(mEditor.getText().charAt(line, endColumn))) {
-            endColumn++;
-        }
-        mEditor.setSelectionRegion(startLine, startColumn, endLine, endColumn);
-    }
-
-    private void handleLongPressForModifiedTextAction(MotionEvent e) {
-        if (mEditor.getCursor().isSelected() || e.getPointerCount() != 1) {
+        if (mEditor.dispatchEvent(new LongPressEvent(mEditor, mEditor.getText().getIndexer().getCharPosition(line, column), e))) {
             return;
         }
-        long res = mEditor.getPointPositionOnScreen(e.getX(), e.getY());
-        int line = IntPair.getFirst(res);
-        int column = IntPair.getSecond(res);
-        //Find word edges
-        int startLine = line, endLine = line;
-        int startColumn = column;
-        while (startColumn > 0 && isIdentifierPart(mEditor.getText().charAt(line, startColumn - 1))) {
-            startColumn--;
-        }
-        int maxColumn = mEditor.getText().getColumnCount(line);
-        int endColumn = column;
-        while (endColumn < maxColumn && isIdentifierPart(mEditor.getText().charAt(line, endColumn))) {
-            endColumn++;
-        }
-        if (startLine == endLine && startColumn == endColumn) {
-            mEditor.showTextActionPopup();
-        } else {
-            mEditor.setSelectionRegion(startLine, startColumn, endLine, endColumn);
-        }
+        selectWord(line, column);
     }
 
     @Override
     public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
-		if(e1 == null || e2 == null)
-			return false;
-        if (mEditor.getTextActionPresenter() instanceof TextActionPopupWindow) {
-            mEditor.getTextActionPresenter().onUpdate(TextActionPopupWindow.SCROLL);
-        } else {
-            mEditor.getTextActionPresenter().onUpdate();
-        }
         int endX = mScroller.getCurrX() + (int) distanceX;
         int endY = mScroller.getCurrY() + (int) distanceY;
         endX = Math.max(endX, 0);
@@ -603,43 +545,56 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         if (!mEditor.getVerticalEdgeEffect().isFinished() && !mEditor.getVerticalEdgeEffect().isRecede()) {
             endY = mScroller.getCurrY();
             float displacement = Math.max(0, Math.min(1, e2.getX() / mEditor.getWidth()));
-            mEditor.getVerticalEdgeEffect().onPull((topOrBottom ? distanceY : -distanceY) / mEditor.getMeasuredHeight(), !topOrBottom ? displacement : 1 - displacement);
+            float distance = (topOrBottom ? distanceY : -distanceY) / mEditor.getMeasuredHeight();
+            if (distance < -0.005) {
+                mEditor.getVerticalEdgeEffect().finish();
+            } else {
+                mEditor.getVerticalEdgeEffect().onPull(distance, !topOrBottom ? displacement : 1 - displacement);
+            }
             notifyY = false;
         }
         if (!mEditor.getHorizontalEdgeEffect().isFinished() && !mEditor.getHorizontalEdgeEffect().isRecede()) {
             endX = mScroller.getCurrX();
             float displacement = Math.max(0, Math.min(1, e2.getY() / mEditor.getHeight()));
-            mEditor.getHorizontalEdgeEffect().onPull((leftOrRight ? distanceX : -distanceX) / mEditor.getMeasuredWidth(), !leftOrRight ? 1 - displacement : displacement);
+            float distance = (leftOrRight ? distanceX : -distanceX) / mEditor.getMeasuredWidth();
+            if (distance < -0.005) {
+                mEditor.getHorizontalEdgeEffect().finish();
+            } else {
+                mEditor.getHorizontalEdgeEffect().onPull(distance, !leftOrRight ? 1 - displacement : displacement);
+            }
             notifyX = false;
         }
         mScroller.startScroll(mScroller.getCurrX(),
                 mScroller.getCurrY(),
                 endX - mScroller.getCurrX(),
                 endY - mScroller.getCurrY(), 0);
-        final float minOverPull = 0;
-        if (notifyY && mScroller.getCurrY() + distanceY <= -minOverPull) {
+        mEditor.updateCompletionWindowPosition(false);
+        final float minOverPull = 2f;
+        if (notifyY && mScroller.getCurrY() + distanceY < -minOverPull) {
             mEditor.getVerticalEdgeEffect().onPull(-distanceY / mEditor.getMeasuredHeight(), Math.max(0, Math.min(1, e2.getX() / mEditor.getWidth())));
             topOrBottom = false;
         }
-        if (notifyY && mScroller.getCurrY() + distanceY >= mEditor.getScrollMaxY() + minOverPull) {
+        if (notifyY && mScroller.getCurrY() + distanceY > mEditor.getScrollMaxY() + minOverPull) {
             mEditor.getVerticalEdgeEffect().onPull(distanceY / mEditor.getMeasuredHeight(), Math.max(0, Math.min(1, e2.getX() / mEditor.getWidth())));
             topOrBottom = true;
         }
-        if (notifyX && mScroller.getCurrX() + distanceX <= -minOverPull) {
+        if (notifyX && mScroller.getCurrX() + distanceX < -minOverPull) {
             mEditor.getHorizontalEdgeEffect().onPull(-distanceX / mEditor.getMeasuredWidth(), Math.max(0, Math.min(1, e2.getY() / mEditor.getHeight())));
             leftOrRight = false;
         }
-        if (notifyX && mScroller.getCurrX() + distanceX >= mEditor.getScrollMaxX() + minOverPull) {
+        if (notifyX && mScroller.getCurrX() + distanceX > mEditor.getScrollMaxX() + minOverPull) {
             mEditor.getHorizontalEdgeEffect().onPull(distanceX / mEditor.getMeasuredWidth(), Math.max(0, Math.min(1, e2.getY() / mEditor.getHeight())));
             leftOrRight = true;
         }
         mEditor.invalidate();
+        mEditor.dispatchEvent(new ScrollEvent(mEditor, mScroller.getCurrX(),
+                mScroller.getCurrY(), endX, endY, ScrollEvent.CAUSE_USER_DRAG));
         return true;
     }
 
     @Override
     public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
-        if (mEditor.isDrag()) {
+        if (!mEditor.getProps().scrollFling) {
             return false;
         }
         // If we do not finish it here, it can produce a high speed and cause the final scroll range to be broken, even a NaN for velocity
@@ -652,14 +607,13 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                 mEditor.getScrollMaxX(),
                 0,
                 mEditor.getScrollMaxY(),
-                mEditor.isOverScrollEnabled() && !mEditor.isWordwrap() ? (int) (20 * mEditor.getDpUnit()) : 0,
-                mEditor.isOverScrollEnabled() ? (int) (20 * mEditor.getDpUnit()) : 0);
+                mEditor.getProps().overScrollEnabled && !mEditor.isWordwrap() ? (int) (20 * mEditor.getDpUnit()) : 0,
+                mEditor.getProps().overScrollEnabled ? (int) (20 * mEditor.getDpUnit()) : 0);
         mEditor.invalidate();
         float minVe = mEditor.getDpUnit() * 2000;
         if (Math.abs(velocityX) >= minVe || Math.abs(velocityY) >= minVe) {
             notifyScrolled();
             mEditor.hideAutoCompleteWindow();
-            mEditor.hideDiagnosticWindow();
         }
         if (Math.abs(velocityX) >= minVe / 2f) {
             mEditor.getHorizontalEdgeEffect().finish();
@@ -667,6 +621,8 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
         if (Math.abs(velocityY) >= minVe) {
             mEditor.getVerticalEdgeEffect().finish();
         }
+        mEditor.dispatchEvent(new ScrollEvent(mEditor, mScroller.getCurrX(),
+                mScroller.getCurrY(), mScroller.getFinalX(), mScroller.getFinalY(), ScrollEvent.CAUSE_USER_FLING));
         return false;
     }
 
@@ -677,14 +633,20 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
             if (newSize < minSize || newSize > maxSize) {
                 return false;
             }
-            int firstVisible = mEditor.getFirstVisibleRow();
-            float top = mScroller.getCurrY() - firstVisible * mEditor.getRowHeight();
-            int height = mEditor.getRowHeight();
+            float focusX = detector.getFocusX();
+            float focusY = detector.getFocusY();
+            int originHeight = mEditor.getRowHeight();
             mEditor.setTextSizePxDirect(newSize);
-            mEditor.invalidate();
-            float newY = firstVisible * mEditor.getRowHeight() + top * mEditor.getRowHeight() / height;
-            mScroller.startScroll(mScroller.getCurrX(), (int) newY, 0, 0, 0);
+            float heightFactor = mEditor.getRowHeight() * 1f / originHeight;
+            float afterScrollY = (mScroller.getCurrY() + focusY) * heightFactor - focusY;
+            float afterScrollX = (mScroller.getCurrX() + focusX) * detector.getScaleFactor() - focusX;
+            afterScrollX = Math.max(0, Math.min(afterScrollX, mEditor.getScrollMaxX()));
+            afterScrollY = Math.max(0, Math.min(afterScrollY, mEditor.getScrollMaxY()));
+            mEditor.dispatchEvent(new ScrollEvent(mEditor, mScroller.getCurrX(),
+                    mScroller.getCurrY(), (int)afterScrollX, (int)afterScrollY, ScrollEvent.CAUSE_SCALE_TEXT));
+            mScroller.startScroll((int) afterScrollX, (int) afterScrollY, 0, 0, 0);
             isScaling = true;
+            mEditor.invalidate();
             return true;
         }
         return false;
@@ -699,6 +661,7 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
     @Override
     public void onScaleEnd(ScaleGestureDetector detector) {
         isScaling = false;
+        mEditor.updateTimestamp();
         mEditor.createLayout();
         mEditor.invalidate();
     }
@@ -735,9 +698,9 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
     @SuppressWarnings("CanBeFinal")
     class SelectionHandle {
 
-        public static final int LEFT = 0;
-        public static final int RIGHT = 1;
-        public static final int BOTH = 2;
+        public static final int LEFT = HandleStateChangeEvent.HANDLE_TYPE_LEFT;
+        public static final int RIGHT = HandleStateChangeEvent.HANDLE_TYPE_RIGHT;
+        public static final int BOTH = HandleStateChangeEvent.HANDLE_TYPE_INSERT;
 
         public int type;
 
@@ -750,65 +713,83 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
             this.type = type;
         }
 
+        private boolean checkNoIntersection(SelectionHandleStyle.HandleDescriptor one, SelectionHandleStyle.HandleDescriptor another) {
+            return !RectF.intersects(one.position, another.position);
+        }
+
         /**
          * Handle the event
          *
          * @param e Event sent by EventHandler
          */
         public void applyPosition(MotionEvent e) {
-            float targetX = mScroller.getCurrX() + e.getX();
-            float targetY = mScroller.getCurrY() + e.getY() - mEditor.getInsertHandleRect().height() * 4 / 3;
+            SelectionHandleStyle.HandleDescriptor descriptor = null;
+            switch (type) {
+                case LEFT:
+                    descriptor = mEditor.getLeftHandleDescriptor();
+                    break;
+                case RIGHT:
+                    descriptor = mEditor.getRightHandleDescriptor();
+                    break;
+                default:
+                    descriptor = mEditor.getInsertHandleDescriptor();
+            }
+            var anotherDesc = type == LEFT ? mEditor.getRightHandleDescriptor() : mEditor.getLeftHandleDescriptor();
+            float targetX = mScroller.getCurrX() + e.getX() + (descriptor.alignment != SelectionHandleStyle.ALIGN_CENTER ? descriptor.position.width() : 0) * (descriptor.alignment == SelectionHandleStyle.ALIGN_LEFT ? 1 : -1);
+            float targetY = mScroller.getCurrY() + e.getY() - descriptor.position.height();
             int line = IntPair.getFirst(mEditor.getPointPosition(0, targetY));
             if (line >= 0 && line < mEditor.getLineCount()) {
                 int column = IntPair.getSecond(mEditor.getPointPosition(targetX, targetY));
                 int lastLine = type == RIGHT ? mEditor.getCursor().getRightLine() : mEditor.getCursor().getLeftLine();
-                int lastColumn = type == RIGHT ? mEditor.getCursor().getLeftColumn() : mEditor.getCursor().getLeftColumn();
+                int lastColumn = type == RIGHT ? mEditor.getCursor().getRightColumn() : mEditor.getCursor().getLeftColumn();
                 int anotherLine = type != RIGHT ? mEditor.getCursor().getRightLine() : mEditor.getCursor().getLeftLine();
                 int anotherColumn = type != RIGHT ? mEditor.getCursor().getRightColumn() : mEditor.getCursor().getLeftColumn();
 
-                if (line != lastLine || column != lastColumn) {
+                if ((line != lastLine || column != lastColumn) && (type == BOTH || (line != anotherLine || column != anotherColumn))) {
                     switch (type) {
                         case BOTH:
                             mEditor.cancelAnimation();
-                            mEditor.setSelection(line, column, false);
+                            mEditor.setSelection(line, column, false, SelectionChangeEvent.CAUSE_SELECTION_HANDLE);
                             break;
                         case RIGHT:
                             if (anotherLine > line || (anotherLine == line && anotherColumn > column)) {
                                 //Swap type
-                                EditorTouchEventHandler.this.mSelHandleType = LEFT;
-                                this.type = LEFT;
-                                left.type = RIGHT;
-                                SelectionHandle tmp = right;
-                                right = left;
-                                left = tmp;
-                                mEditor.setSelectionRegion(line, column, anotherLine, anotherColumn, false);
+                                if (checkNoIntersection(descriptor, anotherDesc)) {
+                                    dispatchHandle(mSelHandleType, false);
+                                    EditorTouchEventHandler.this.mSelHandleType = LEFT;
+                                    dispatchHandle(mSelHandleType, true);
+                                    this.type = LEFT;
+                                    left.type = RIGHT;
+                                    SelectionHandle tmp = right;
+                                    right = left;
+                                    left = tmp;
+                                    mEditor.setSelectionRegion(line, column, anotherLine, anotherColumn, false, SelectionChangeEvent.CAUSE_SELECTION_HANDLE);
+                                }
                             } else {
-                                mEditor.setSelectionRegion(anotherLine, anotherColumn, line, column, false);
+                                mEditor.setSelectionRegion(anotherLine, anotherColumn, line, column, false, SelectionChangeEvent.CAUSE_SELECTION_HANDLE);
                             }
                             break;
                         case LEFT:
                             if (anotherLine < line || (anotherLine == line && anotherColumn < column)) {
                                 //Swap type
-                                EditorTouchEventHandler.this.mSelHandleType = RIGHT;
-                                this.type = RIGHT;
-                                right.type = LEFT;
-                                SelectionHandle tmp = right;
-                                right = left;
-                                left = tmp;
-                                mEditor.setSelectionRegion(anotherLine, anotherColumn, line, column, false);
+                                if (checkNoIntersection(descriptor, anotherDesc)) {
+                                    dispatchHandle(mSelHandleType, false);
+                                    EditorTouchEventHandler.this.mSelHandleType = RIGHT;
+                                    dispatchHandle(mSelHandleType, true);
+                                    this.type = RIGHT;
+                                    right.type = LEFT;
+                                    SelectionHandle tmp = right;
+                                    right = left;
+                                    left = tmp;
+                                    mEditor.setSelectionRegion(anotherLine, anotherColumn, line, column, false, SelectionChangeEvent.CAUSE_SELECTION_HANDLE);
+                                }
                             } else {
-                                mEditor.setSelectionRegion(line, column, anotherLine, anotherColumn, false);
+                                mEditor.setSelectionRegion(line, column, anotherLine, anotherColumn, false, SelectionChangeEvent.CAUSE_SELECTION_HANDLE);
                             }
                             break;
                     }
                 }
             }
-
-            if (mEditor.getTextActionPresenter() instanceof TextActionPopupWindow) {
-                mEditor.getTextActionPresenter().onUpdate(TextActionPopupWindow.DRAG);
-            } else {
-                mEditor.getTextActionPresenter().onUpdate();
-            }
         }
 
     }
@@ -817,17 +798,19 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
      * Runnable for controlling auto-scrolling when thumb reaches the edges of editor
      */
     private class EdgeScrollRunnable implements Runnable {
-        private final static int MAX_FACTOR = 25;
+        private final static int MAX_FACTOR = 32;
         private final static float INCREASE_FACTOR = 1.06f;
 
-        private int initialDelta;
+        private final int initialDelta;
         private int deltaHorizontal;
         private int deltaVertical;
         private int lastDx, lastDy;
         private int factorX, factorY;
+        private long postTimes;
 
         public EdgeScrollRunnable(int initDelta) {
             initialDelta = deltaHorizontal = deltaVertical = initDelta;
+            postTimes = 0;
         }
 
         @Override
@@ -850,10 +833,13 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                 }
             }
             scrollBy(dx, dy);
+            if (mMagnifier.isShowing()) {
+                mMagnifier.dismiss();
+            }
 
             // Speed up if we are scrolling in the direction
             if (isSameSign(dx, lastDx)) {
-                if (factorX < MAX_FACTOR) {
+                if (factorX < MAX_FACTOR && (postTimes & 1) == 0) {
                     factorX++;
                     deltaHorizontal *= INCREASE_FACTOR;
                 }
@@ -863,7 +849,7 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
                 factorX = 0;
             }
             if (isSameSign(dy, lastDy)) {
-                if (factorY < MAX_FACTOR) {
+                if (factorY < MAX_FACTOR && (postTimes & 1) == 0) {
                     factorY++;
                     deltaVertical *= INCREASE_FACTOR;
                 }
@@ -877,6 +863,7 @@ final class EditorTouchEventHandler implements GestureDetector.OnGestureListener
             // Update selection
             handleSelectionChange2(mThumb);
 
+            postTimes++;
             // Post for animation
             if (mEdgeFlags != 0) {
                 mEditor.postDelayed(this, 10);
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/HwAcceleratedRenderer.java b/editor/src/main/java/io/github/rosemoe/sora/widget/HwAcceleratedRenderer.java
new file mode 100644
index 000000000..7bbf4cffa
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/HwAcceleratedRenderer.java
@@ -0,0 +1,186 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import android.graphics.Canvas;
+import android.graphics.RenderNode;
+
+import androidx.annotation.RequiresApi;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import io.github.rosemoe.sora.annotations.Experimental;
+import io.github.rosemoe.sora.lang.styling.EmptyReader;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentListener;
+import io.github.rosemoe.sora.util.ArrayList;
+
+/**
+ * Hardware accelerated text render, which manages {@link RenderNode}
+ * to speed up drawing process.
+ *
+ * @author Rosemoe
+ */
+@RequiresApi(29)
+@Experimental
+class HwAcceleratedRenderer implements ContentListener {
+
+    private final CodeEditor editor;
+    private final ArrayList<TextRenderNode> cache;
+
+    public HwAcceleratedRenderer(CodeEditor editor) {
+        this.editor = editor;
+        cache = new ArrayList<>(64);
+    }
+
+    private boolean shouldUpdateCache() {
+        return !editor.isWordwrap() && editor.isHardwareAcceleratedDrawAllowed();
+    }
+
+    public boolean invalidateInRegion(int startLine, int endLine) {
+        var res = new AtomicBoolean(false);
+        cache.forEach((node) -> {
+            if (!node.isDirty && node.line >= startLine && node.line <= endLine) {
+                node.isDirty = true;
+                res.set(true);
+            }
+        });
+        return res.get();
+    }
+
+    /**
+     * Called by editor when text style changes.
+     * Such as text size/typeface.
+     * Also called when wordwrap state changes from true to false
+     */
+    public void invalidate() {
+        if (shouldUpdateCache()) {
+            invalidateDirectly();
+        }
+    }
+
+    public void invalidateDirectly() {
+        cache.forEach(node -> node.isDirty = true);
+    }
+
+    public TextRenderNode getNode(int line) {
+        var size = cache.size();
+        for (int i = 0; i < size; i++) {
+            var node = cache.get(i);
+            if (node.line == line) {
+                cache.remove(i);
+                cache.add(0, node);
+                return node;
+            }
+        }
+        var node = new TextRenderNode(line);
+        cache.add(0, node);
+        return node;
+    }
+
+    public void keepCurrentInDisplay(int start, int end) {
+        var itr = cache.iterator();
+        while (itr.hasNext()) {
+            var node = itr.next();
+            if (node.line < start || node.line > end) {
+                itr.remove();
+                node.renderNode.discardDisplayList();
+            }
+        }
+    }
+
+    public int drawLineHardwareAccelerated(Canvas canvas, int line, float offset) {
+        if (!canvas.isHardwareAccelerated()) {
+            throw new UnsupportedOperationException("Only hardware-accelerated canvas can be used");
+        }
+        var styles = editor.getStyles();
+        // It's safe to use row directly because the mode is non-wordwrap
+        var node = getNode(line);
+        if (node.needsRecord()) {
+            var spans = styles == null ? null : styles.spans;
+            var reader = spans == null ? new EmptyReader() : spans.read();
+            try {
+                reader.moveToLine(line);
+            } catch (Exception e) {
+                reader = new EmptyReader();
+            }
+            editor.updateLineDisplayList(node.renderNode, line, reader);
+            try {
+                reader.moveToLine(-1);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+            node.isDirty = false;
+        }
+        canvas.save();
+        canvas.translate(offset, editor.getRowTop(line) - editor.getOffsetY());
+        canvas.drawRenderNode(node.renderNode);
+        canvas.restore();
+        return node.renderNode.getWidth();
+    }
+
+    @Override
+    public void beforeReplace(Content content) {
+        //Intentionally empty
+    }
+
+    @Override
+    public void afterInsert(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
+        if (shouldUpdateCache()) {
+            if (startLine != endLine)
+                invalidateInRegion(startLine, Integer.MAX_VALUE);
+        }
+    }
+
+    @Override
+    public void afterDelete(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
+        if (shouldUpdateCache()) {
+            int delta = endLine - startLine;
+            if (delta != 0)
+                invalidateInRegion(startLine, Integer.MAX_VALUE);
+        }
+    }
+
+    protected static class TextRenderNode {
+
+        /**
+         * The target line of this node.
+         * -1 for unavailable
+         */
+        public int line;
+        public RenderNode renderNode;
+        public boolean isDirty;
+
+        public TextRenderNode(int line) {
+            this.line = line;
+            renderNode = new RenderNode("editorRenderNode");
+            isDirty = true;
+        }
+
+        public boolean needsRecord() {
+            return isDirty || !renderNode.hasDisplayList();
+        }
+
+    }
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/KeyMetaStates.java b/editor/src/main/java/io/github/rosemoe/sora/widget/KeyMetaStates.java
new file mode 100644
index 000000000..cf15960ca
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/KeyMetaStates.java
@@ -0,0 +1,66 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import android.text.Editable;
+import android.view.KeyEvent;
+
+/**
+ * Handles key events such as SHIFT
+ * @author Rosemoe
+ */
+public class KeyMetaStates extends android.text.method.MetaKeyKeyListener {
+
+    private final CodeEditor editor;
+
+    /**
+     * Dummy text used for Android original APIs
+     */
+    private final Editable dest = Editable.Factory.getInstance().newEditable("");
+
+    public KeyMetaStates(CodeEditor editor) {
+        this.editor = editor;
+    }
+
+    public void onKeyDown(KeyEvent event) {
+        super.onKeyDown(editor, dest, event.getKeyCode(), event);
+    }
+
+    public void onKeyUp(KeyEvent event) {
+        super.onKeyUp(editor, dest, event.getKeyCode(), event);
+    }
+
+    public boolean isShiftPressed() {
+        return getMetaState(dest, META_SHIFT_ON) != 0;
+    }
+
+    public void adjust() {
+        adjustMetaAfterKeypress(dest);
+    }
+
+    public void clearMetaStates(int states) {
+        clearMetaKeyState(editor, dest, states);
+    }
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/MaterialEdgeEffect.java b/editor/src/main/java/io/github/rosemoe/sora/widget/MaterialEdgeEffect.java
old mode 100755
new mode 100644
similarity index 89%
rename from app/src/main/java/io/github/rosemoe/editor/widget/MaterialEdgeEffect.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/MaterialEdgeEffect.java
index f5f1f9962..e46bd181c
--- a/app/src/main/java/io/github/rosemoe/editor/widget/MaterialEdgeEffect.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/MaterialEdgeEffect.java
@@ -1,19 +1,27 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget;
 
 import android.graphics.Canvas;
 import android.graphics.Paint;
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/SymbolInputView.java b/editor/src/main/java/io/github/rosemoe/sora/widget/SymbolInputView.java
new file mode 100644
index 000000000..ce6325753
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/SymbolInputView.java
@@ -0,0 +1,110 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.util.AttributeSet;
+import android.widget.Button;
+import android.widget.LinearLayout;
+
+public class SymbolInputView extends LinearLayout {
+
+    private int textColor;
+    private CodeEditor editor;
+
+    public SymbolInputView(Context context) {
+        super(context);
+        init();
+    }
+
+    public SymbolInputView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public SymbolInputView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init();
+    }
+
+    public SymbolInputView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        init();
+    }
+
+    private void init() {
+        setBackgroundColor(Color.WHITE);
+        setOrientation(HORIZONTAL);
+        textColor = Color.BLACK;
+    }
+
+    /**
+     * Bind editor for the view
+     */
+    public void bindEditor(CodeEditor editor) {
+        this.editor = editor;
+    }
+
+    /**
+     * Set text color in the panel
+     */
+    public void setTextColor(int color) {
+        for (int i = 0; i < getChildCount(); i++) {
+            ((Button) getChildAt(i)).setTextColor(color);
+        }
+        textColor = color;
+    }
+
+    /**
+     * Remove all added symbols
+     */
+    public void removeSymbols() {
+        removeAllViews();
+    }
+
+    /**
+     * Add symbols to the view.
+     *
+     * @param display    The texts displayed in button
+     * @param insertText The actual text to be inserted to editor when the button is clicked
+     */
+    public void addSymbols(String[] display, final String[] insertText) {
+        int count = Math.max(display.length, insertText.length);
+        for (int i = 0; i < count; i++) {
+            Button btn = new Button(getContext(), null, android.R.attr.buttonStyleSmall);
+            btn.setText(display[i]);
+            btn.setBackground(new ColorDrawable(0));
+            btn.setTextColor(textColor);
+            addView(btn, new LayoutParams(-2, -1));
+            int finalI = i;
+            btn.setOnClickListener((view) -> {
+                if (editor != null)
+                    editor.insertText(insertText[finalI], 1);
+            });
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/SymbolPairMatch.java b/editor/src/main/java/io/github/rosemoe/sora/widget/SymbolPairMatch.java
new file mode 100644
index 000000000..c4fed3628
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/SymbolPairMatch.java
@@ -0,0 +1,179 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentLine;
+
+/**
+ * Define symbol pairs to complete them automatically when the user
+ * enters the first character of pair.
+ *
+ * @author Rosemoe
+ */
+public class SymbolPairMatch {
+
+    private final Map<Character, Replacement> pairMaps = new HashMap<>();
+
+    private SymbolPairMatch parent;
+
+    public SymbolPairMatch() {
+        this(null);
+    }
+
+    public SymbolPairMatch(SymbolPairMatch parent) {
+        setParent(parent);
+    }
+
+    protected void setParent(SymbolPairMatch parent) {
+        this.parent = parent;
+    }
+
+    /**
+     * Put a pair of symbol completion
+     * When the user types the {@param firstCharacter}, it will be replaced by {@param replacement}
+     * Replacement maybe null to disable completion for this character.
+     *
+     * @see Replacement
+     */
+    public void putPair(char firstCharacter, Replacement replacement) {
+        pairMaps.put(firstCharacter, replacement);
+    }
+
+    public final Replacement getCompletion(char character) {
+        Replacement result = parent != null ? parent.getCompletion(character) : null;
+        if (result == null) {
+            result = pairMaps.get(character);
+        }
+        return result;
+    }
+
+    public void removeAllRules() {
+        pairMaps.clear();
+    }
+
+
+    /**
+     * Defines a replacement of input
+     */
+    public static class Replacement  {
+
+
+
+        public interface IReplacement {
+            /**
+             * The method will be called
+             * to decide whether to perform the replacement or not.
+             * It may be same as vscode language-configuration Auto-closing 'notIn'
+             * also see <a href="https://code.visualstudio.com/api/language-extensions/language-configuration-guide#autoclosing">this</a>
+             * If not implemented,always return true
+             * @param currentLine The current line edit in the editor,quick analysis it to decide whether to replaced
+             * @param leftColumn return current cursor column
+             */
+            default boolean shouldDoReplace(ContentLine currentLine,int leftColumn) {
+                return true;
+            }
+
+            /**
+             * when before the replaced and select a range,surrounds the selected content with return pair if return pair not null.
+             * If not implemented,always return null
+             * also see <a href="https://code.visualstudio.com/api/language-extensions/language-configuration-guide#autosurrounding">this</a>
+             */
+             default String[] getAutoSurroundPair() {
+                 return null;
+             }
+
+        }
+
+        /**
+         * Defines that this character does not have to be replaced
+         */
+        public final static Replacement NO_REPLACEMENT = new Replacement("", 0);
+
+        public final String text;
+
+        public final int selection;
+
+        private String[] autoSurroundPair;
+
+        /*
+         *
+         */
+        private IReplacement iReplacement;
+
+        /**
+         * The entered character will be replaced to {@param text} and
+         * the new cursor position will be {@param selection}
+         * The value of {@param selection} maybe 0 to {@param text}.length()
+         */
+        public Replacement(String text, int selection) {
+            this.selection = selection;
+            this.text = text;
+            if (selection < 0 || selection > text.length()) {
+                throw new IllegalArgumentException("invalid selection value");
+            }
+        }
+
+
+        public Replacement(String text, int selection,IReplacement iReplacement) {
+            this(text,selection);
+            //cache pair
+            this.autoSurroundPair = iReplacement!=null ? iReplacement.getAutoSurroundPair() : null;
+        }
+
+        public String[] getAutoSurroundPair() {
+            return autoSurroundPair;
+        }
+
+
+        protected boolean notHasAutoSurroundPair() {
+            return iReplacement==null && autoSurroundPair==null;
+        }
+
+        protected boolean shouldNotDoReplace(Content content) {
+            if (iReplacement == null) {
+                return false;
+            }
+            ContentLine currentLine = content.getLine(content.getCursor().getLeftLine());
+            return !iReplacement.shouldDoReplace(currentLine, content.getCursor().getLeftColumn());
+        }
+
+    }
+
+    public final static class DefaultSymbolPairs extends SymbolPairMatch {
+
+        public DefaultSymbolPairs() {
+            super.putPair('{', new Replacement("{}", 1));
+            super.putPair('(', new Replacement("()", 1));
+            super.putPair('[', new Replacement("[]", 1));
+            super.putPair('"', new Replacement("\"\"", 1));
+            super.putPair('\'', new Replacement("''", 1));
+        }
+
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/base/EditorPopupWindow.java b/editor/src/main/java/io/github/rosemoe/sora/widget/base/EditorPopupWindow.java
new file mode 100644
index 000000000..cbaf12589
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/base/EditorPopupWindow.java
@@ -0,0 +1,286 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.base;
+
+import android.view.Gravity;
+import android.view.View;
+import android.widget.PopupWindow;
+
+import androidx.annotation.NonNull;
+
+import java.util.Objects;
+
+import io.github.rosemoe.sora.event.EventReceiver;
+import io.github.rosemoe.sora.event.ScrollEvent;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Base class for all editor popup windows.
+ */
+public class EditorPopupWindow {
+
+    /**
+     * Update the position of this window when user scrolls the editor
+     */
+    public final static int FEATURE_SCROLL_AS_CONTENT = 1;
+
+    /**
+     * Allow the window to be displayed outside the view's rectangle.
+     * Otherwise, the window's size will be adjusted to force it to display in the view.
+     * If the space can't display it, it will get hidden.
+     */
+    public final static int FEATURE_SHOW_OUTSIDE_VIEW_ALLOWED = 1 << 1;
+
+    /**
+     * Hide this window when the user scrolls fast. Such as the selection handle
+     * is currently near the edge of screen.
+     */
+    public final static int FEATURE_HIDE_WHEN_FAST_SCROLL = 1 << 2;
+
+    private final PopupWindow mWindow;
+    private final CodeEditor mEditor;
+    private final int mFeatures;
+    private final int[] mLocationBuffer = new int[2];
+    private final EventReceiver<ScrollEvent> mScrollListener;
+    private boolean mShowState;
+    private boolean mRegisterFlag;
+    private boolean mRegistered;
+    private int mOffsetX, mOffsetY, mX, mY, mWidth, mHeight;
+
+    /**
+     * Create a popup window for editor
+     *
+     * @param features Features to request
+     * @see #FEATURE_SCROLL_AS_CONTENT
+     * @see #FEATURE_SHOW_OUTSIDE_VIEW_ALLOWED
+     * @see #FEATURE_HIDE_WHEN_FAST_SCROLL
+     */
+    public EditorPopupWindow(@NonNull CodeEditor editor, int features) {
+        mEditor = Objects.requireNonNull(editor);
+        mFeatures = features;
+        mWindow = new PopupWindow(editor);
+        mWindow.setElevation(editor.getDpUnit() * 8);
+        mScrollListener = ((event, unsubscribe) -> {
+            if (!mRegisterFlag) {
+                unsubscribe.unsubscribe();
+                mRegistered = false;
+                return;
+            }
+            switch (event.getCause()) {
+                case ScrollEvent.CAUSE_MAKE_POSITION_VISIBLE:
+                case ScrollEvent.CAUSE_TEXT_SELECTING:
+                case ScrollEvent.CAUSE_USER_FLING:
+                case ScrollEvent.CAUSE_SCALE_TEXT:
+                    if (isFeatureEnabled(FEATURE_HIDE_WHEN_FAST_SCROLL) &&
+                            (Math.abs(event.getEndX() - event.getStartX()) > 80 ||
+                                    Math.abs(event.getEndY() - event.getStartY()) > 80)) {
+                        if (isShowing()) {
+                            dismiss();
+                            return;
+                        }
+                    }
+                    break;
+            }
+            if (isFeatureEnabled(FEATURE_SCROLL_AS_CONTENT)) {
+                applyWindowAttributes(false);
+            }
+        });
+        register();
+    }
+
+    /**
+     * Get editor instance
+     */
+    @NonNull
+    public CodeEditor getEditor() {
+        return mEditor;
+    }
+
+    /**
+     * Checks whether a single feature is enabled
+     *
+     * @see #FEATURE_SCROLL_AS_CONTENT
+     * @see #FEATURE_SHOW_OUTSIDE_VIEW_ALLOWED
+     * @see #FEATURE_HIDE_WHEN_FAST_SCROLL
+     */
+    public boolean isFeatureEnabled(int feature) {
+        if (Integer.bitCount(feature) != 1) {
+            throw new IllegalArgumentException("Not a valid feature integer");
+        }
+        return (mFeatures & feature) != 0;
+    }
+
+    /**
+     * Register this window in target editor.
+     * After registering, features are available.
+     * This automatically done when you create the window. But if you call {@link #unregister()}, you
+     * should re-invoke this method to make features available.
+     */
+    public void register() {
+        if (!mRegistered) {
+            mEditor.subscribeEvent(ScrollEvent.class, mScrollListener);
+        }
+        mRegisterFlag = true;
+    }
+
+    /**
+     * Unregister this window in target editor.
+     */
+    public void unregister() {
+        mRegisterFlag = false;
+    }
+
+    public boolean isShowing() {
+        return mShowState;
+    }
+
+    /**
+     * Get the actual {@link PopupWindow} instance.
+     *
+     * Note that you should not manage its visibility but update that by invoking methods in this
+     * class. Otherwise, there may be some abnormal display.
+     */
+    public PopupWindow getPopup() {
+        return mWindow;
+    }
+
+    /**
+     * @see PopupWindow#setContentView(View)
+     */
+    public void setContentView(View view) {
+        mWindow.setContentView(view);
+    }
+
+    private int wrapHorizontal(int horizontal) {
+        return Math.max(0, Math.min(horizontal, mEditor.getWidth()));
+    }
+
+    private int wrapVertical(int vertical) {
+        return Math.max(0, Math.min(vertical, mEditor.getHeight()));
+    }
+
+    private void applyWindowAttributes(boolean show) {
+        if (!show && !isShowing()) {
+            return;
+        }
+        boolean autoScroll = isFeatureEnabled(FEATURE_SCROLL_AS_CONTENT);
+        var left = autoScroll ? (mX - mEditor.getOffsetX()) : (mX - mOffsetX);
+        var top = autoScroll ? (mY - mEditor.getOffsetY()) : (mY - mOffsetY);
+        var right = left + mWidth;
+        var bottom = top + mHeight;
+        if (!isFeatureEnabled(FEATURE_SHOW_OUTSIDE_VIEW_ALLOWED)) {
+            // Adjust positions
+            left = wrapHorizontal(left);
+            right = wrapHorizontal(right);
+            top = wrapVertical(top);
+            bottom = wrapVertical(bottom);
+            if (top >= bottom || left >= right) {
+                dismiss();
+                return;
+            }
+        }
+        // Show/update if needed
+        mEditor.getLocationInWindow(mLocationBuffer);
+        int width = right - left;
+        int height = bottom - top;
+        left += mLocationBuffer[0];
+        top += mLocationBuffer[1];
+        if (mWindow.isShowing()) {
+            mWindow.update(left, top, width, height);
+        } else if (show) {
+            mWindow.setHeight(height);
+            mWindow.setWidth(width);
+            mWindow.showAtLocation(mEditor, Gravity.START | Gravity.TOP, left, top);
+        }
+    }
+
+    /**
+     * Get width you've set for this window.
+     *
+     * Note that, according to you feature switches, this may be different from the actual size of the window on screen.
+     */
+    public int getWidth() {
+        return mWidth;
+    }
+
+    /**
+     * Get height you've set for this window.
+     *
+     * Note that, according to you feature switches, this may be different from the actual size of the window on screen.
+     */
+    public int getHeight() {
+        return mHeight;
+    }
+
+    /**
+     * Set the size of this window.
+     *
+     * Note that, according to you feature switches, the window can have a different size on screen.
+     */
+    public void setSize(int width, int height) {
+        mWidth = width;
+        mHeight = height;
+        applyWindowAttributes(false);
+    }
+
+    /**
+     * Sets the position of the window <strong>in editor's drawing offset</strong>
+     */
+    public void setLocation(int x, int y) {
+        mX = x;
+        mY = y;
+        mOffsetY = getEditor().getOffsetY();
+        mOffsetX = getEditor().getOffsetX();
+        applyWindowAttributes(false);
+    }
+
+    /**
+     * Sets the absolute position on view.
+     */
+    public void setLocationAbsolutely(int x, int y) {
+        setLocation(x + mEditor.getOffsetX(), y + mEditor.getOffsetY());
+    }
+
+    /**
+     * Show the window if appropriate
+     */
+    public void show() {
+        if (mShowState) {
+            return;
+        }
+        applyWindowAttributes(true);
+        mShowState = true;
+    }
+
+    /**
+     * Dismiss the window
+     */
+    public void dismiss() {
+        if (mShowState) {
+            mShowState = false;
+            mWindow.dismiss();
+        }
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/component/DefaultCompletionItemAdapter.java b/editor/src/main/java/io/github/rosemoe/sora/widget/component/DefaultCompletionItemAdapter.java
new file mode 100644
index 000000000..6f1d9de34
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/component/DefaultCompletionItemAdapter.java
@@ -0,0 +1,70 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.component;
+
+import android.util.TypedValue;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import io.github.rosemoe.sora.R;
+import io.github.rosemoe.sora.lang.completion.CompletionItem;
+
+/**
+ * Default adapter to display results
+ *
+ * @author Rose
+ */
+public final class DefaultCompletionItemAdapter extends EditorCompletionAdapter {
+
+    @Override
+    public int getItemHeight() {
+        // 45 dp
+        return (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 45, getContext().getResources().getDisplayMetrics());
+    }
+
+    @Override
+    public View getView(int pos, View view, ViewGroup parent, boolean isCurrentCursorPosition) {
+        if (view == null) {
+            view = LayoutInflater.from(getContext()).inflate(R.layout.default_completion_result_item, parent, false);
+        }
+        CompletionItem item = getItem(pos);
+        TextView tv = view.findViewById(R.id.result_item_label);
+        tv.setText(item.label);
+        tv = view.findViewById(R.id.result_item_desc);
+        tv.setText(item.desc);
+        view.setTag(pos);
+        if (isCurrentCursorPosition) {
+            view.setBackgroundColor(0xffdddddd);
+        } else {
+            view.setBackgroundColor(0xffffffff);
+        }
+        ImageView iv = view.findViewById(R.id.result_item_image);
+        iv.setImageDrawable(item.icon);
+        return view;
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorAutoCompletion.java b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorAutoCompletion.java
new file mode 100644
index 000000000..869160f4c
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorAutoCompletion.java
@@ -0,0 +1,429 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.component;
+
+import android.content.Context;
+import android.graphics.drawable.GradientDrawable;
+import android.os.Bundle;
+import android.os.SystemClock;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+import android.widget.ProgressBar;
+import android.widget.RelativeLayout;
+import android.widget.Toast;
+
+import io.github.rosemoe.sora.lang.Language;
+import io.github.rosemoe.sora.lang.completion.CompletionCancelledException;
+import io.github.rosemoe.sora.lang.completion.CompletionItem;
+import io.github.rosemoe.sora.lang.completion.CompletionPublisher;
+import io.github.rosemoe.sora.lang.styling.Spans;
+import io.github.rosemoe.sora.lang.styling.TextStyle;
+import io.github.rosemoe.sora.text.CharPosition;
+import io.github.rosemoe.sora.text.ContentReference;
+import io.github.rosemoe.sora.text.Cursor;
+import io.github.rosemoe.sora.text.TextReference;
+import io.github.rosemoe.sora.widget.CodeEditor;
+import io.github.rosemoe.sora.widget.base.EditorPopupWindow;
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * Auto complete window for editing code quicker
+ *
+ * @author Rosemoe
+ */
+public class EditorAutoCompletion extends EditorPopupWindow implements EditorBuiltinComponent {
+    private final CodeEditor mEditor;
+    private final ListView mListView;
+    private final ProgressBar mProgressBar;
+    private final GradientDrawable mBackground;
+    protected boolean mCancelShowUp = false;
+    private int mCurrent = -1;
+    private long mRequestTime;
+    private int mMaxHeight;
+    private EditorCompletionAdapter mAdapter;
+    private CompletionThread mThread;
+    private long requestShow = 0;
+    private long requestHide = -1;
+    private boolean enabled = true;
+
+    /**
+     * Create a panel instance for the given editor
+     *
+     * @param editor Target editor
+     */
+    public EditorAutoCompletion(CodeEditor editor) {
+        super(editor, FEATURE_HIDE_WHEN_FAST_SCROLL);
+        mEditor = editor;
+        mAdapter = new DefaultCompletionItemAdapter();
+        RelativeLayout layout = new RelativeLayout(mEditor.getContext());
+        mListView = new ListView(mEditor.getContext());
+        layout.addView(mListView, new LinearLayout.LayoutParams(-1, -1));
+        mProgressBar = new ProgressBar(editor.getContext());
+        layout.addView(mProgressBar);
+        var params = ((RelativeLayout.LayoutParams) mProgressBar.getLayoutParams());
+        params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
+        params.width = params.height = (int) (mEditor.getDpUnit() * 30);
+        setContentView(layout);
+        GradientDrawable gd = new GradientDrawable();
+        gd.setCornerRadius(editor.getDpUnit() * 8);
+        layout.setBackground(gd);
+        mBackground = gd;
+        applyColorScheme();
+        mListView.setDividerHeight(0);
+        setLoading(true);
+        mListView.setOnItemClickListener((parent, view, position, id) -> {
+            try {
+                select(position);
+            } catch (Exception e) {
+                Toast.makeText(mEditor.getContext(), e.toString(), Toast.LENGTH_SHORT).show();
+            }
+        });
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+        if (!enabled) {
+            hide();
+        }
+    }
+
+    public void setAdapter(EditorCompletionAdapter adapter) {
+        mAdapter = adapter;
+        if (adapter == null) {
+            mAdapter = new DefaultCompletionItemAdapter();
+        }
+    }
+
+    @Override
+    public void show() {
+        if (mCancelShowUp || !isEnabled()) {
+            return;
+        }
+        requestShow = System.currentTimeMillis();
+        final var requireRequest = mRequestTime;
+        mEditor.postDelayed(() -> {
+            if (requestHide < requestShow && mRequestTime == requireRequest) {
+                super.show();
+            }
+        }, 70);
+    }
+
+    public void hide() {
+        super.dismiss();
+        cancelCompletion();
+        requestHide = System.currentTimeMillis();
+    }
+
+    public Context getContext() {
+        return mEditor.getContext();
+    }
+
+    public int getCurrentPosition() {
+        return mCurrent;
+    }
+
+    /**
+     * Apply colors for self
+     */
+    public void applyColorScheme() {
+        EditorColorScheme colors = mEditor.getColorScheme();
+        mBackground.setStroke(1, colors.getColor(EditorColorScheme.AUTO_COMP_PANEL_CORNER));
+        mBackground.setColor(colors.getColor(EditorColorScheme.AUTO_COMP_PANEL_BG));
+    }
+
+    /**
+     * Change layout to loading/idle
+     *
+     * @param state Whether loading
+     */
+    public void setLoading(boolean state) {
+        mProgressBar.setVisibility(state ? View.VISIBLE : View.INVISIBLE);
+    }
+
+    /**
+     * Move selection down
+     */
+    public void moveDown() {
+        if (mCurrent + 1 >= mListView.getAdapter().getCount()) {
+            return;
+        }
+        mCurrent++;
+        ((EditorCompletionAdapter) mListView.getAdapter()).notifyDataSetChanged();
+        ensurePosition();
+    }
+
+    /**
+     * Move selection up
+     */
+    public void moveUp() {
+        if (mCurrent - 1 < 0) {
+            return;
+        }
+        mCurrent--;
+        ((EditorCompletionAdapter) mListView.getAdapter()).notifyDataSetChanged();
+        ensurePosition();
+    }
+
+    /**
+     * Perform motion events
+     */
+    private void performScrollList(int offset) {
+        long down = SystemClock.uptimeMillis();
+        var ev = MotionEvent.obtain(down, down, MotionEvent.ACTION_DOWN, 0, 0, 0);
+        mListView.onTouchEvent(ev);
+        ev.recycle();
+
+        ev = MotionEvent.obtain(down, down, MotionEvent.ACTION_MOVE, 0, offset, 0);
+        mListView.onTouchEvent(ev);
+        ev.recycle();
+
+        ev = MotionEvent.obtain(down, down, MotionEvent.ACTION_CANCEL, 0, offset, 0);
+        mListView.onTouchEvent(ev);
+        ev.recycle();
+    }
+
+    /**
+     * Make current selection visible
+     */
+    private void ensurePosition() {
+        mListView.post(() -> {
+            while (mListView.getFirstVisiblePosition() + 1 > mCurrent && mListView.canScrollList(-1)) {
+                performScrollList(mAdapter.getItemHeight() / 2);
+            }
+            while (mListView.getLastVisiblePosition() - 1 < mCurrent && mListView.canScrollList(1)) {
+                performScrollList(-mAdapter.getItemHeight() / 2);
+            }
+        });
+    }
+
+    /**
+     * Select current position
+     */
+    public void select() {
+        select(mCurrent);
+    }
+
+    /**
+     * Reject the IME's requests to set composing region/text
+     */
+    public boolean shouldRejectComposing() {
+        return mCancelShowUp;
+    }
+
+    /**
+     * Select the given position
+     *
+     * @param pos Index of auto complete item
+     */
+    public void select(int pos) {
+        if (pos == -1) {
+            mEditor.commitText("\n");
+            return;
+        }
+        CompletionItem item = ((EditorCompletionAdapter) mListView.getAdapter()).getItem(pos);
+        Cursor cursor = mEditor.getCursor();
+        if (!cursor.isSelected()) {
+            mCancelShowUp = true;
+            mEditor.restartInput();
+            mEditor.getText().beginBatchEdit();
+            item.performCompletion(mEditor, mEditor.getText(), mThread.mPosition.line, mThread.mPosition.column);
+            mEditor.getText().endBatchEdit();
+            mCancelShowUp = false;
+        }
+        hide();
+    }
+
+    /**
+     * Stop previous completion thread
+     */
+    public void cancelCompletion() {
+        var previous = mThread;
+        if (previous != null && previous.isAlive()) {
+            previous.cancel();
+            previous.mTime = -1;
+        }
+        mThread = null;
+    }
+
+    /**
+     * Check cursor position's span.
+     * If {@link io.github.rosemoe.sora.lang.styling.TextStyle#NO_COMPLETION_BIT} is set, true is returned.
+     */
+    public boolean checkNoCompletion() {
+        var pos = mEditor.getCursor().left();
+        var line = pos.line;
+        var column = pos.column;
+        var styles = mEditor.getStyles();
+        Spans spans;
+        // Do not make completion without styles. The language may be empty or busy analyzing spans
+        if (styles == null || (spans = styles.spans) == null) {
+            return true;
+        }
+        var reader = spans.read();
+        try {
+            reader.moveToLine(line);
+            int index = reader.getSpanCount() - 1;
+            if (index == -1) {
+                return true;
+            }
+            for (int i = 0;i < reader.getSpanCount();i++) {
+                if (reader.getSpanAt(i).column > column) {
+                    index = i - 1;
+                    break;
+                }
+            }
+            index = Math.max(0, Math.min(index, reader.getSpanCount() - 1));
+            if (TextStyle.isNoCompletion(reader.getSpanAt(index).style)) {
+                reader.moveToLine(-1);
+                return true;
+            }
+            reader.moveToLine(-1);
+            return false;
+        } catch (Exception e) {
+            e.printStackTrace();
+            // Unexpected exception. Maybe there is something wrong in language implementation
+            return true;
+        }
+    }
+
+    /**
+     * Start completion at current selection position
+     */
+    public void requireCompletion() {
+        if (mCancelShowUp || !isEnabled()) {
+            return;
+        }
+        var text = mEditor.getText();
+        if (text.getCursor().isSelected() || checkNoCompletion()) {
+            hide();
+            return;
+        }
+        if (System.nanoTime() - mRequestTime < mEditor.getProps().cancelCompletionNs) {
+            hide();
+            mRequestTime = System.nanoTime();
+            return;
+        }
+        cancelCompletion();
+        mRequestTime = System.nanoTime();
+        mCurrent = -1;
+        var publisher = new CompletionPublisher(mEditor.getHandler(), () -> {
+            mAdapter.notifyDataSetChanged();
+            float newHeight = mAdapter.getItemHeight() * mAdapter.getCount();
+            setSize(getWidth(), (int) Math.min(newHeight, mMaxHeight));
+            if (!isShowing()) {
+                show();
+            }
+        }, mEditor.getEditorLanguage().getInterruptionLevel());
+        mAdapter.attachValues(this, publisher.getItems());
+        mListView.setAdapter(mAdapter);
+        mThread = new CompletionThread(mRequestTime, publisher);
+        setLoading(true);
+        mThread.start();
+    }
+
+    public void setMaxHeight(int height) {
+        mMaxHeight = height;
+    }
+
+    /**
+     * Auto-completion Analyzing thread
+     *
+     * @author Rosemoe
+     */
+    public final class CompletionThread extends Thread implements TextReference.Validator {
+
+        private long mTime;
+        private final Bundle mExtra;
+        private final CharPosition mPosition;
+        private final Language mLanguage;
+        private final ContentReference mRef;
+        private final CompletionPublisher mPublisher;
+        private boolean mAborted;
+
+        public CompletionThread(long requestTime, CompletionPublisher publisher) {
+            mTime = requestTime;
+            mPosition = mEditor.getCursor().left();
+            mLanguage = mEditor.getEditorLanguage();
+            mRef = new ContentReference(mEditor.getText());
+            mRef.setValidator(this);
+            mPublisher = publisher;
+            mExtra = mEditor.getExtraArguments();
+            mAborted = false;
+        }
+
+        /**
+         * Abort the completion thread
+         */
+        public void cancel() {
+            mAborted = true;
+            var level = mLanguage.getInterruptionLevel();
+            if (level == Language.INTERRUPTION_LEVEL_STRONG) {
+                interrupt();
+            }
+            mPublisher.cancel();
+        }
+
+        public boolean isCancelled() {
+            return mAborted;
+        }
+
+        @Override
+        public void validate() {
+            if (mRequestTime != mTime || mAborted) {
+                throw new CompletionCancelledException();
+            }
+        }
+
+        @Override
+        public void run() {
+            try {
+                mLanguage.requireAutoComplete(mRef, mPosition, mPublisher, mExtra);
+                if (mPublisher.hasData()) {
+                    mPublisher.updateList(true);
+                } else {
+                    mEditor.post(EditorAutoCompletion.this::hide);
+                }
+                mEditor.post(() -> setLoading(false));
+            } catch (Exception e) {
+                if (e instanceof CompletionCancelledException) {
+                    Log.v("CompletionThread", "Completion is cancelled");
+                }
+                e.printStackTrace();
+            }
+        }
+
+
+    }
+
+}
+
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorBuiltinComponent.java b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorBuiltinComponent.java
new file mode 100644
index 000000000..3c1b1cbde
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorBuiltinComponent.java
@@ -0,0 +1,43 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.component;
+
+/**
+ * Builtin editor component.
+ *
+ * @author Rosemoe
+ */
+public interface EditorBuiltinComponent {
+
+    /**
+     * Enable/disable this builtin component
+     */
+    void setEnabled(boolean enabled);
+
+    /**
+     * Check whether this component is enabled
+     */
+    boolean isEnabled();
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/EditorCompletionAdapter.java b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorCompletionAdapter.java
old mode 100755
new mode 100644
similarity index 50%
rename from app/src/main/java/io/github/rosemoe/editor/widget/EditorCompletionAdapter.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorCompletionAdapter.java
index 266f0f139..b984fc5b7
--- a/app/src/main/java/io/github/rosemoe/editor/widget/EditorCompletionAdapter.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorCompletionAdapter.java
@@ -1,50 +1,55 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget.component;
 
 import android.content.Context;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 
-import com.itsaky.lsp.models.CompletionItem;
-
 import java.util.List;
 
+import io.github.rosemoe.sora.lang.completion.CompletionItem;
+
 /**
  * A class to make custom adapter for auto-completion window
+ *
  * @see EditorCompletionAdapter#getItemHeight()
  * @see EditorCompletionAdapter#getView(int, View, ViewGroup, boolean)
  */
 public abstract class EditorCompletionAdapter extends BaseAdapter {
 
-    private EditorAutoCompleteWindow mWindow;
+    private EditorAutoCompletion mWindow;
     private List<CompletionItem> mItems;
 
-    public void clear() {
-        if(mItems != null)
-            mItems.clear();
-    }
-
     /**
-     * Called by {@link EditorAutoCompleteWindow} to attach some arguments
+     * Called by {@link EditorAutoCompletion} to attach some arguments
      */
-    public void attachAttributes(EditorAutoCompleteWindow window, List<CompletionItem> items) {
+    public void attachValues(EditorAutoCompletion window, List<CompletionItem> items) {
         mWindow = window;
         mItems = items;
+        notifyDataSetInvalidated();
     }
 
     @Override
@@ -59,7 +64,7 @@ public abstract class EditorCompletionAdapter extends BaseAdapter {
 
     @Override
     public int getCount() {
-        return mItems != null ? mItems.size() : 0;
+        return mItems == null ? 0 : mItems.size();
     }
 
     @Override
@@ -76,6 +81,8 @@ public abstract class EditorCompletionAdapter extends BaseAdapter {
 
     /**
      * Implementation of this class should provide exact height of its item
+     *
+     * The value will be used to calculate the height of completion window
      */
     public abstract int getItemHeight();
 
@@ -84,9 +91,5 @@ public abstract class EditorCompletionAdapter extends BaseAdapter {
      * @param isCurrentCursorPosition Is the {@param position} currently selected
      */
     protected abstract View getView(int position, View convertView, ViewGroup parent, boolean isCurrentCursorPosition);
-	
-	protected String getHtmlJavadocAt(int index) {
-		return "";
-	}
 
 }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorTextActionWindow.java b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorTextActionWindow.java
new file mode 100644
index 000000000..f500b0d84
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/component/EditorTextActionWindow.java
@@ -0,0 +1,235 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.component;
+
+import android.annotation.SuppressLint;
+import android.graphics.RectF;
+import android.graphics.drawable.GradientDrawable;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.Button;
+
+import io.github.rosemoe.sora.R;
+import io.github.rosemoe.sora.event.EventReceiver;
+import io.github.rosemoe.sora.event.HandleStateChangeEvent;
+import io.github.rosemoe.sora.event.ScrollEvent;
+import io.github.rosemoe.sora.event.SelectionChangeEvent;
+import io.github.rosemoe.sora.event.Unsubscribe;
+import io.github.rosemoe.sora.widget.CodeEditor;
+import io.github.rosemoe.sora.widget.EditorTouchEventHandler;
+import io.github.rosemoe.sora.widget.base.EditorPopupWindow;
+
+/**
+ * This window will show when selecting text to present text actions.
+ *
+ * @author Rosemoe
+ */
+public final class EditorTextActionWindow extends EditorPopupWindow implements View.OnClickListener, EventReceiver<SelectionChangeEvent>, EditorBuiltinComponent {
+    private final CodeEditor mEditor;
+    private final Button mPasteBtn;
+    private final Button mCopyBtn;
+    private final Button mCutBtn;
+    private final View mRootView;
+    private final EditorTouchEventHandler mHandler;
+    private final static long DELAY = 200;
+    private long mLastScroll;
+    private int mLastPosition;
+    private boolean mEnabled = true;
+
+    /**
+     * Create a panel for the given editor
+     *
+     * @param editor Target editor
+     */
+    public EditorTextActionWindow(CodeEditor editor) {
+        super(editor, FEATURE_SHOW_OUTSIDE_VIEW_ALLOWED);
+        mEditor = editor;
+        mHandler = editor.getEventHandler();
+        // Since popup window does provide decor view, we have to pass null to this method
+        @SuppressLint("InflateParams")
+        View root = LayoutInflater.from(editor.getContext()).inflate(R.layout.text_compose_panel, null);
+        Button selectAll = root.findViewById(R.id.panel_btn_select_all);
+        Button cut = root.findViewById(R.id.panel_btn_cut);
+        Button copy = root.findViewById(R.id.panel_btn_copy);
+        mPasteBtn = root.findViewById(R.id.panel_btn_paste);
+        mCopyBtn = copy;
+        mCutBtn = cut;
+        selectAll.setOnClickListener(this);
+        cut.setOnClickListener(this);
+        copy.setOnClickListener(this);
+        mPasteBtn.setOnClickListener(this);
+        GradientDrawable gd = new GradientDrawable();
+        gd.setCornerRadius(5 * editor.getDpUnit());
+        gd.setColor(0xffffffff);
+        root.setBackground(gd);
+        setContentView(root);
+        setSize(0, (int) (mEditor.getDpUnit() * 60));
+        mRootView = root;
+        editor.subscribeEvent(SelectionChangeEvent.class, this);
+        editor.subscribeEvent(ScrollEvent.class, ((event, unsubscribe) -> {
+            var last = mLastScroll;
+            mLastScroll = System.currentTimeMillis();
+            if (mLastScroll - last < DELAY) {
+                postDisplay();
+            }
+        }));
+        editor.subscribeEvent(HandleStateChangeEvent.class, ((event, unsubscribe) -> {
+            if (event.isHeld()) {
+                postDisplay();
+            }
+        }));
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        mEnabled = enabled;
+        if (!enabled) {
+            dismiss();
+        }
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return mEnabled;
+    }
+
+    private void postDisplay() {
+        if (!isShowing()) {
+            return;
+        }
+        dismiss();
+        if (!mEditor.getCursor().isSelected()) {
+            return;
+        }
+        mEditor.postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                if (!mHandler.hasAnyHeldHandle() && System.currentTimeMillis() - mLastScroll > DELAY
+                        && mEditor.getScroller().isFinished()) {
+                    displayWindow();
+                } else {
+                    mEditor.postDelayed(this, DELAY);
+                }
+            }
+        }, DELAY);
+    }
+
+    @Override
+    public void onReceive(SelectionChangeEvent event, Unsubscribe unsubscribe) {
+        if (mHandler.hasAnyHeldHandle()) {
+            return;
+        }
+        if (event.isSelected()) {
+            if (!isShowing()) {
+                mEditor.post(this::displayWindow);
+            }
+            mLastPosition = -1;
+        } else {
+            var show = false;
+            if (event.getCause() == SelectionChangeEvent.CAUSE_TAP && event.getLeft().index == mLastPosition && !isShowing() && !mEditor.getText().isInBatchEdit()) {
+                mEditor.post(this::displayWindow);
+                show = true;
+            } else {
+                dismiss();
+            }
+            if (event.getCause() == SelectionChangeEvent.CAUSE_TAP && !show) {
+                mLastPosition = event.getLeft().index;
+            } else {
+                mLastPosition = -1;
+            }
+        }
+    }
+
+    private int selectTop(RectF rect) {
+        var rowHeight = mEditor.getRowHeight();
+        if (rect.top - rowHeight * 3 / 2F > getHeight()) {
+            return (int) (rect.top - rowHeight * 3 / 2 - getHeight());
+        } else {
+            return (int) (rect.bottom + rowHeight / 2);
+        }
+    }
+
+    public void displayWindow() {
+        int top;
+        var cursor = mEditor.getCursor();
+        if (cursor.isSelected()) {
+            var leftRect = mEditor.getLeftHandleDescriptor().position;
+            var rightRect = mEditor.getRightHandleDescriptor().position;
+            var top1 = selectTop(leftRect);
+            var top2 = selectTop(rightRect);
+            top = Math.min(top1, top2);
+        } else {
+            top = selectTop(mEditor.getInsertHandleDescriptor().position);
+        }
+        top = Math.max(0, Math.min(top, mEditor.getHeight() - getHeight() - 5));
+        float handleLeftX = mEditor.getOffset(mEditor.getCursor().getLeftLine(), mEditor.getCursor().getLeftColumn());
+        float handleRightX = mEditor.getOffset(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
+        int panelX = (int) ((handleLeftX + handleRightX) / 2f);
+        setLocationAbsolutely(panelX, top);
+        show();
+    }
+
+    /**
+     * Update the state of paste button
+     */
+    private void updateBtnState() {
+        mPasteBtn.setEnabled(mEditor.hasClip() && mEditor.isEditable());
+        mCopyBtn.setVisibility(mEditor.getCursor().isSelected() ? View.VISIBLE : View.GONE);
+        mCutBtn.setVisibility(mEditor.getCursor().isSelected() && mEditor.isEditable() ? View.VISIBLE : View.GONE);
+        mRootView.measure(View.MeasureSpec.makeMeasureSpec(1000000, View.MeasureSpec.AT_MOST), View.MeasureSpec.makeMeasureSpec(100000, View.MeasureSpec.AT_MOST));
+        setSize(Math.min(mRootView.getMeasuredWidth(), (int) (mEditor.getDpUnit() * 230)), getHeight());
+    }
+
+    @Override
+    public void show() {
+        if (!mEnabled) {
+            return;
+        }
+        updateBtnState();
+        super.show();
+    }
+
+    @Override
+    public void onClick(View p1) {
+        int id = p1.getId();
+        if (id == R.id.panel_btn_select_all) {
+            mEditor.selectAll();
+            return;
+        } else if (id == R.id.panel_btn_cut) {
+            mEditor.copyText();
+            if (mEditor.getCursor().isSelected()) {
+                mEditor.deleteText();
+            }
+        } else if (id == R.id.panel_btn_paste) {
+            mEditor.pasteText();
+            mEditor.setSelection(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
+        } else if (id == R.id.panel_btn_copy) {
+            mEditor.copyText();
+            mEditor.setSelection(mEditor.getCursor().getRightLine(), mEditor.getCursor().getRightColumn());
+        }
+        dismiss();
+    }
+
+}
+
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/component/Magnifier.java b/editor/src/main/java/io/github/rosemoe/sora/widget/component/Magnifier.java
new file mode 100644
index 000000000..25033c779
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/component/Magnifier.java
@@ -0,0 +1,277 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.component;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
+import android.graphics.Rect;
+import android.os.Build;
+import android.util.Log;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.PixelCopy;
+import android.widget.ImageView;
+import android.widget.PopupWindow;
+
+import androidx.annotation.RequiresApi;
+
+import io.github.rosemoe.sora.R;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Magnifier specially designed for CodeEditor
+ *
+ * @author Rosemoe
+ */
+public final class Magnifier implements EditorBuiltinComponent {
+
+    private final CodeEditor view;
+    private final PopupWindow popup;
+    private final ImageView image;
+    private final Paint paint;
+    private int x, y;
+    private final float maxTextSize;
+    private long expectedRequestTime;
+    private boolean enabled = true;
+
+    /**
+     * Scale factor for regions
+     */
+    private final float scaleFactor;
+
+    public Magnifier(CodeEditor editor) {
+        view = editor;
+        popup = new PopupWindow(editor);
+        popup.setElevation(view.getDpUnit() * 8);
+        @SuppressLint("InflateParams") var view = LayoutInflater.from(editor.getContext()).inflate(R.layout.magnifier_popup, null);
+        image = view.findViewById(R.id.magnifier_image_view);
+        popup.setHeight((int) (editor.getDpUnit() * 70));
+        popup.setWidth((int) (editor.getDpUnit() * 100));
+        popup.setContentView(view);
+        maxTextSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 28, view.getResources().getDisplayMetrics());
+        scaleFactor = 1.35f;
+        paint = new Paint();
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+        if (!enabled) {
+            dismiss();
+        }
+    }
+
+    /**
+     * Show the magnifier according to the given position.
+     * X and Y are relative to the code editor view
+     */
+    public void show(int x, int y) {
+        if (!enabled) {
+            return;
+        }
+        if (Math.abs(x - this.x) < 2 && Math.abs(y - this.y) < 2) {
+            return;
+        }
+        if (view.getTextSizePx() > maxTextSize) {
+            if (isShowing()) {
+                dismiss();
+            }
+            return;
+        }
+        popup.setWidth(Math.min(view.getWidth() * 3 / 5, (int)view.getDpUnit()) * 250);
+        this.x = x;
+        this.y = y;
+        int[] pos = new int[2];
+        view.getLocationInWindow(pos);
+        var left = Math.max(pos[0] + x - popup.getWidth() / 2, 0);
+        var right = left + popup.getWidth();
+        if (right > view.getWidth() + pos[0]) {
+            right = view.getWidth() + pos[0];
+            left = Math.max(0, right - popup.getWidth());
+        }
+        var top = Math.max(pos[1] + y - popup.getHeight() - (int) (view.getRowHeight()), 0);
+        if (popup.isShowing()) {
+            popup.update(left, top, popup.getWidth(), popup.getHeight());
+        } else {
+            popup.showAtLocation(view, Gravity.START | Gravity.TOP, left, top);
+        }
+        updateDisplay();
+    }
+
+    /**
+     * Whether the magnifier is showing
+     */
+    public boolean isShowing() {
+        return popup.isShowing();
+    }
+
+    /**
+     * Hide the magnifier
+     */
+    public void dismiss() {
+        popup.dismiss();
+    }
+
+    /**
+     * Update the display of the magnifier without updating the window's
+     * location on screen.
+     *
+     * This should be called when new content has been drawn on the target view so
+     * that the content in magnifier will not be invalid.
+     *
+     * This method does not take effect if the magnifier is not currently shown
+     */
+    public void updateDisplay() {
+        if (!isShowing()) {
+            return;
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && view.getContext() instanceof Activity) {
+            updateDisplayOreo((Activity)view.getContext());
+        } else {
+            updateDisplayWithinEditor();
+        }
+    }
+
+    /**
+     * Update display on API 26 or later.
+     *
+     * This will include other view in the window as {@link PixelCopy} is used to capture the
+     * screen.
+     */
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    private void updateDisplayOreo(Activity activity) {
+        var requiredWidth = (int) (popup.getWidth() / scaleFactor);
+        var requiredHeight = (int) (popup.getHeight() / scaleFactor);
+
+        var left = Math.max(x - requiredWidth / 2, 0);
+        var top = Math.max(y - requiredHeight / 2, 0);
+        var right = Math.min(left + requiredWidth, view.getWidth());
+        var bottom = Math.min(top + requiredHeight, view.getHeight());
+        if (right - left < requiredWidth) {
+            left = Math.max(0, right - requiredWidth);
+        }
+        if (bottom - top < requiredHeight) {
+            top = Math.max(0, bottom - requiredHeight);
+        }
+        if (right - left <= 0 || bottom - top <= 0) {
+            dismiss();
+            return;
+        }
+        var pos = new int[2];
+        view.getLocationInWindow(pos);
+        final var requestTime = System.currentTimeMillis();
+        expectedRequestTime = requestTime;
+        var clip = Bitmap.createBitmap(right - left, bottom - top, Bitmap.Config.ARGB_8888);
+        try {
+            PixelCopy.request(activity.getWindow(), new Rect(pos[0] + left, pos[1] + top, pos[0] + right, pos[1] + bottom), clip, (var statusCode) -> {
+                if (requestTime != expectedRequestTime) {
+                    return;
+                }
+                if (statusCode == PixelCopy.SUCCESS) {
+                    var dest = Bitmap.createBitmap(popup.getWidth(), popup.getHeight(), Bitmap.Config.ARGB_8888);
+                    var scaled = Bitmap.createScaledBitmap(clip, popup.getWidth(), popup.getHeight(), false);
+                    clip.recycle();
+
+                    Canvas canvas = new Canvas(dest);
+                    paint.reset();
+                    paint.setAntiAlias(true);
+                    canvas.drawARGB(0, 0, 0, 0);
+                    final int roundFactor = 6;
+                    canvas.drawRoundRect(0, 0, popup.getWidth(), popup.getHeight(), view.getDpUnit() * roundFactor, view.getDpUnit() * roundFactor, paint);
+                    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
+                    canvas.drawBitmap(scaled, 0, 0, paint);
+                    scaled.recycle();
+
+                    image.setImageBitmap(dest);
+                } else {
+                    Log.w("Magnifier", "Failed to copy pixels, error = " + statusCode);
+                }
+            }, view.getHandler());
+        } catch (IllegalArgumentException e) {
+            // Happens when the view has not been drawn yet
+            dismiss();
+            if (!clip.isRecycled()) {
+                clip.recycle();
+            }
+        }
+    }
+
+    /**
+     * Update display on low API devices
+     *
+     * This method does not include other views as it obtain editor's display by
+     * directly calling {@link CodeEditor#drawView(Canvas)}
+     */
+    private void updateDisplayWithinEditor() {
+        var dest = Bitmap.createBitmap(popup.getWidth(), popup.getHeight(), Bitmap.Config.ARGB_8888);
+        var requiredWidth = (int) (popup.getWidth() / scaleFactor);
+        var requiredHeight = (int) (popup.getHeight() / scaleFactor);
+
+        var left = Math.max(x - requiredWidth / 2, 0);
+        var top = Math.max(y - requiredHeight / 2, 0);
+        var right = Math.min(left + requiredWidth, view.getWidth());
+        var bottom = Math.min(top + requiredHeight, view.getHeight());
+        if (right - left < requiredWidth) {
+            left = Math.max(0, right - requiredWidth);
+        }
+        if (bottom - top < requiredHeight) {
+            top = Math.max(0, bottom - requiredHeight);
+        }
+        if (right - left <= 0 || bottom - top <= 0) {
+            dismiss();
+            dest.recycle();
+            return;
+        }
+        var clip = Bitmap.createBitmap(requiredWidth, requiredHeight, Bitmap.Config.ARGB_8888);
+        var viewCanvas = new Canvas(clip);
+        viewCanvas.translate(-left, -top);
+        view.drawView(viewCanvas);
+        var scaled = Bitmap.createScaledBitmap(clip, popup.getWidth(), popup.getHeight(), false);
+        clip.recycle();
+
+        Canvas canvas = new Canvas(dest);
+        paint.reset();
+        paint.setAntiAlias(true);
+        canvas.drawARGB(0, 0, 0, 0);
+        final int roundFactor = 6;
+        canvas.drawRoundRect(0, 0, popup.getWidth(), popup.getHeight(), view.getDpUnit() * roundFactor, view.getDpUnit() * roundFactor, paint);
+        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
+        canvas.drawBitmap(scaled, 0, 0, paint);
+        scaled.recycle();
+
+        image.setImageBitmap(dest);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/layout/AbstractLayout.java b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/AbstractLayout.java
new file mode 100644
index 000000000..fa611ec65
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/AbstractLayout.java
@@ -0,0 +1,83 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.layout;
+
+import java.util.List;
+
+import io.github.rosemoe.sora.graphics.GraphicTextRow;
+import io.github.rosemoe.sora.lang.styling.Span;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentLine;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
+/**
+ * Base layout implementation of {@link Layout}.
+ * It provides some convenient methods to editor instance and text measuring.
+ *
+ * @author Rose
+ */
+public abstract class AbstractLayout implements Layout {
+
+    protected CodeEditor editor;
+    protected Content text;
+
+    public AbstractLayout(CodeEditor editor, Content text) {
+        this.editor = editor;
+        this.text = text;
+    }
+
+    protected List<Span> getSpans(int line) {
+        return editor.getSpansForLine(line);
+    }
+
+    protected float[] orderedFindCharIndex(float targetOffset, ContentLine str, int line, int index, int end) {
+        var gtr = GraphicTextRow.obtain();
+        gtr.set(str, index, end, editor.getTabWidth(), getSpans(line), editor.getTextPaint());
+        var res = gtr.findOffsetByAdvance(index, targetOffset);
+        GraphicTextRow.recycle(gtr);
+        return res;
+    }
+
+    protected float[] orderedFindCharIndex(float targetOffset, ContentLine str, int line) {
+       return orderedFindCharIndex(targetOffset, str, line, 0, str.length());
+    }
+
+
+    @Override
+    public void afterDelete(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
+
+    }
+
+    @Override
+    public void afterInsert(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
+
+    }
+
+    @Override
+    public void destroyLayout() {
+        editor = null;
+        text = null;
+    }
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/Layout.java b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/Layout.java
old mode 100755
new mode 100644
similarity index 62%
rename from app/src/main/java/io/github/rosemoe/editor/widget/Layout.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/layout/Layout.java
index cfd21c57e..d0252e274
--- a/app/src/main/java/io/github/rosemoe/editor/widget/Layout.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/Layout.java
@@ -1,22 +1,30 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget.layout;
 
-import io.github.rosemoe.editor.text.ContentListener;
-import io.github.rosemoe.editor.text.LineRemoveListener;
+import io.github.rosemoe.sora.text.ContentListener;
+import io.github.rosemoe.sora.text.LineRemoveListener;
 
 /**
  * Layout is a manager class for editor to display text
@@ -25,7 +33,7 @@ import io.github.rosemoe.editor.text.LineRemoveListener;
  *
  * @author Rose
  */
-interface Layout extends LineRemoveListener, ContentListener {
+public interface Layout extends LineRemoveListener, ContentListener {
 
     /**
      * Called by editor to destroy this layout
@@ -71,7 +79,7 @@ interface Layout extends LineRemoveListener, ContentListener {
      * @param xOffset Horizontal offset on layout
      * @param yOffset Vertical offset on layout
      * @return Packed IntPair, first is line and second is column
-     * @see io.github.rosemoe.editor.util.IntPair
+     * @see io.github.rosemoe.sora.util.IntPair
      */
     long getCharPositionForLayoutOffset(float xOffset, float yOffset);
 
@@ -96,4 +104,9 @@ interface Layout extends LineRemoveListener, ContentListener {
      */
     float[] getCharLayoutOffset(int line, int column, float[] array);
 
+    /**
+     * Get how many rows are in the given line
+     */
+    int getRowCountForLine(int line);
+
 }
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/LineBreakLayout.java b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/LineBreakLayout.java
old mode 100755
new mode 100644
similarity index 58%
rename from app/src/main/java/io/github/rosemoe/editor/widget/LineBreakLayout.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/layout/LineBreakLayout.java
index 630fb1c90..9a5f05d6b
--- a/app/src/main/java/io/github/rosemoe/editor/widget/LineBreakLayout.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/LineBreakLayout.java
@@ -1,26 +1,36 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget.layout;
 
 import java.util.NoSuchElementException;
 
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.ContentLine;
-import io.github.rosemoe.editor.util.BinaryHeap;
-import io.github.rosemoe.editor.util.IntPair;
+import io.github.rosemoe.sora.graphics.GraphicTextRow;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentLine;
+import io.github.rosemoe.sora.util.BinaryHeap;
+import io.github.rosemoe.sora.util.IntPair;
+import io.github.rosemoe.sora.widget.CodeEditor;
 
 /**
  * Layout implementation of editor
@@ -28,11 +38,11 @@ import io.github.rosemoe.editor.util.IntPair;
  *
  * @author Rose
  */
-class LineBreakLayout extends AbstractLayout {
+public class LineBreakLayout extends AbstractLayout {
 
     private BinaryHeap widthMaintainer;
 
-    LineBreakLayout(CodeEditor editor, Content text) {
+    public LineBreakLayout(CodeEditor editor, Content text) {
         super(editor, text);
         measureAllLines();
     }
@@ -43,21 +53,26 @@ class LineBreakLayout extends AbstractLayout {
         }
         widthMaintainer = new BinaryHeap();
         widthMaintainer.ensureCapacity(text.getLineCount());
+        var gtr = GraphicTextRow.obtain();
         for (int i = 0; i < text.getLineCount(); i++) {
             ContentLine line = text.getLine(i);
-            int width = (int) measureText(line, 0, line.length());
+            gtr.set(line, 0, line.length(), editor.getTabWidth(), getSpans(i), editor.getTextPaint());
+            int width = (int) gtr.measureText(0, line.length());
             line.setWidth(width);
             line.setId(widthMaintainer.push(width));
         }
+        GraphicTextRow.recycle(gtr);
     }
 
     private void measureLines(int startLine, int endLine) {
         if (text == null) {
             return;
         }
+        var gtr = GraphicTextRow.obtain();
         while (startLine <= endLine && startLine < text.getLineCount()) {
             ContentLine line = text.getLine(startLine);
-            int width = (int) measureText(line, 0, line.length());
+            gtr.set(line, 0, line.length(), editor.getTabWidth(), getSpans(startLine), editor.getTextPaint());
+            int width = (int) gtr.measureText(0, line.length());
             if (line.getId() != -1) {
                 if (line.getWidth() == width) {
                     startLine++;
@@ -71,6 +86,7 @@ class LineBreakLayout extends AbstractLayout {
             line.setWidth(width);
             startLine++;
         }
+        GraphicTextRow.recycle(gtr);
     }
 
     @Override
@@ -85,11 +101,13 @@ class LineBreakLayout extends AbstractLayout {
 
     @Override
     public void afterInsert(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
+        super.afterInsert(content, startLine, startColumn, endLine, endColumn, insertedContent);
         measureLines(startLine, endLine);
     }
 
     @Override
     public void afterDelete(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
+        super.afterDelete(content, startLine, startColumn, endLine, endColumn, deletedContent);
         measureLines(startLine, startLine);
     }
 
@@ -124,31 +142,37 @@ class LineBreakLayout extends AbstractLayout {
         int lineCount = text.getLineCount();
         int line = Math.min(lineCount - 1, Math.max((int) (yOffset / editor.getRowHeight()), 0));
         ContentLine str = text.getLine(line);
-        float[] res = orderedFindCharIndex(xOffset, str);
+        float[] res = orderedFindCharIndex(xOffset, str, line);
         return IntPair.pack(line, (int) res[0]);
     }
 
     @Override
     public float[] getCharLayoutOffset(int line, int column, float[] dest) {
-        if (text == null) {
-            return new float[2];
-        }
         if (dest == null || dest.length < 2) {
             dest = new float[2];
         }
-        CharSequence sequence = text.getLine(line);
+        var sequence = text.getLine(line);
         dest[0] = editor.getRowHeight() * (line + 1);
-        dest[1] = measureText(sequence, 0, column);
+        var gtr = GraphicTextRow.obtain();
+        gtr.set(sequence, 0, sequence.length(), editor.getTabWidth(), getSpans(line), editor.getTextPaint());
+        dest[1] = gtr.measureText(0, column);
+        GraphicTextRow.recycle(gtr);
         return dest;
     }
 
+    @Override
+    public int getRowCountForLine(int line) {
+        return 1;
+    }
+
     class LineBreakLayoutRowItr implements RowIterator {
 
         private final Row result;
         private int currentRow;
+        private final int initRow;
 
         LineBreakLayoutRowItr(int initialRow) {
-            currentRow = initialRow;
+            initRow = currentRow = initialRow;
             result = new Row();
             result.isLeadingRow = true;
             result.startColumn = 0;
@@ -169,6 +193,10 @@ class LineBreakLayout extends AbstractLayout {
             return currentRow >= 0 && currentRow < text.getLineCount();
         }
 
+        @Override
+        public void reset() {
+            currentRow = initRow;
+        }
     }
 
 }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/layout/Row.java b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/Row.java
new file mode 100644
index 000000000..0c12904be
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/Row.java
@@ -0,0 +1,56 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.layout;
+
+/**
+ * This class represents a 'row' in editor.
+ * Editor uses this to draw rows
+ *
+ * @author Rose
+ */
+public class Row {
+
+    /**
+     * The index in lines
+     * But not row index
+     */
+    public int lineIndex;
+
+    /**
+     * Whether this row is a start of a line
+     * Editor will draw line number to left of this row to indicate this
+     */
+    public boolean isLeadingRow;
+
+    /**
+     * Start index in target line
+     */
+    public int startColumn;
+
+    /**
+     * End index in target line
+     */
+    public int endColumn;
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/layout/RowIterator.java b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/RowIterator.java
new file mode 100644
index 000000000..d229de5eb
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/RowIterator.java
@@ -0,0 +1,63 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.layout;
+
+import java.util.NoSuchElementException;
+
+/**
+ * Row iterator.
+ * This iterator is able to return a series of Row objects linearly
+ * Editor uses this to get information of rows and paint them accordingly
+ *
+ * @author Rose
+ */
+public interface RowIterator {
+
+    /**
+     * Return next Row object
+     * <p>
+     * The result should not be stored, because implementing classes will always return the same
+     * object due to performance
+     *
+     * @return Row object contains the information about a row
+     * @throws NoSuchElementException If no more row available
+     */
+    Row next();
+
+    /**
+     * Whether there is more Row object
+     *
+     * @return Whether more row available
+     */
+    boolean hasNext();
+
+    /**
+     * Reset the position to its original position.
+     *
+     * This can be useful when the elements should be iterated for
+     * several times.
+     */
+    void reset();
+
+}
diff --git a/app/src/main/java/io/github/rosemoe/editor/widget/WordwrapLayout.java b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/WordwrapLayout.java
old mode 100755
new mode 100644
similarity index 69%
rename from app/src/main/java/io/github/rosemoe/editor/widget/WordwrapLayout.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/layout/WordwrapLayout.java
index a3e0a254e..efdadaf6d
--- a/app/src/main/java/io/github/rosemoe/editor/widget/WordwrapLayout.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/layout/WordwrapLayout.java
@@ -1,27 +1,39 @@
 /*
- *   Copyright 2020-2021 Rosemoe
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.widget;
+package io.github.rosemoe.sora.widget.layout;
+
+import android.util.TypedValue;
 
 import java.util.ArrayList;
 import java.util.List;
 import java.util.NoSuchElementException;
 
-import io.github.rosemoe.editor.text.Content;
-import io.github.rosemoe.editor.text.ContentLine;
-import io.github.rosemoe.editor.util.IntPair;
+import io.github.rosemoe.sora.graphics.GraphicTextRow;
+import io.github.rosemoe.sora.text.Content;
+import io.github.rosemoe.sora.text.ContentLine;
+import io.github.rosemoe.sora.util.IntPair;
+import io.github.rosemoe.sora.widget.CodeEditor;
 
 /**
  * Wordwrap layout for editor
@@ -33,15 +45,15 @@ import io.github.rosemoe.editor.util.IntPair;
  *
  * @author Rose
  */
-class WordwrapLayout extends AbstractLayout {
+public class WordwrapLayout extends AbstractLayout {
 
     private final List<RowRegion> rowTable;
     private final int width;
 
-    WordwrapLayout(CodeEditor editor, Content text) {
+    public WordwrapLayout(CodeEditor editor, Content text) {
         super(editor, text);
         rowTable = new ArrayList<>();
-        width = editor.getWidth() - (int) editor.measureTextRegionOffset() - (int) editor.getDpUnit() * 5;
+        width = editor.getWidth() - (int) (editor.measureTextRegionOffset() + TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5.0f, editor.getResources().getDisplayMetrics()));
         breakAllLines();
     }
 
@@ -104,25 +116,17 @@ class WordwrapLayout extends AbstractLayout {
 
     private void breakLine(int line, List<Integer> breakpoints) {
         ContentLine sequence = text.getLine(line);
-        float currentWidth = 0;
-        for (int i = 0; i < sequence.length(); i++) {
-            char ch = sequence.charAt(i);
-            float single = fontCache.measureChar(ch, shadowPaint);
-            if (ch == '\t') {
-                single = fontCache.measureChar(' ', shadowPaint) * editor.getTabWidth();
-            }
-            if (currentWidth + single > width) {
-                int lastCommit = breakpoints.size() != 0 ? breakpoints.get(breakpoints.size() - 1) : 0;
-                if (i == lastCommit) {
-                    i++;
-                    continue;
-                }
-                breakpoints.add(i);
-                currentWidth = 0;
-                i--;
-            } else {
-                currentWidth += single;
+        int start = 0;
+        int len = sequence.length();
+
+        while (start < len) {
+            var next = (int) editor.findFirstVisibleChar(width, start, len, 0, sequence, line)[0];
+            // Force to break the text, though no space is available
+            if (next == start) {
+                next++;
             }
+            breakpoints.add(next);
+            start = next;
         }
         if (breakpoints.size() != 0 && breakpoints.get(breakpoints.size() - 1) == sequence.length()) {
             breakpoints.remove(breakpoints.size() - 1);
@@ -136,6 +140,7 @@ class WordwrapLayout extends AbstractLayout {
 
     @Override
     public void afterInsert(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence insertedContent) {
+        super.afterInsert(content, startLine, startColumn, endLine, endColumn, insertedContent);
         // Update line numbers
         int delta = endLine - startLine;
         if (delta != 0) {
@@ -149,6 +154,7 @@ class WordwrapLayout extends AbstractLayout {
 
     @Override
     public void afterDelete(Content content, int startLine, int startColumn, int endLine, int endColumn, CharSequence deletedContent) {
+        super.afterDelete(content, startLine, startColumn, endLine, endColumn, deletedContent);
         int delta = endLine - startLine;
         if (delta != 0) {
             int startRow = findRow(startLine);
@@ -203,7 +209,7 @@ class WordwrapLayout extends AbstractLayout {
         int row = (int) (yOffset / editor.getRowHeight());
         row = Math.max(0, Math.min(row, rowTable.size() - 1));
         RowRegion region = rowTable.get(row);
-        int column = (int) orderedFindCharIndex(xOffset, text.getLine(region.line), region.startColumn, region.endColumn)[0];
+        int column = (int) orderedFindCharIndex(xOffset, text.getLine(region.line), region.line, region.startColumn, region.endColumn)[0];
         return IntPair.pack(region.line, column);
     }
 
@@ -222,20 +228,35 @@ class WordwrapLayout extends AbstractLayout {
             while (region.startColumn < column && row + 1 < rowTable.size()) {
                 row++;
                 region = rowTable.get(row);
-                if (region.line != line) {
+                if (region.line != line || region.startColumn > column) {
                     row--;
                     region = rowTable.get(row);
                     break;
                 }
             }
             dest[0] = editor.getRowHeight() * (row + 1);
-            dest[1] = measureText(text.getLine(region.line), region.startColumn, column);
+            var sequence = text.getLine(region.line);
+            var gtr = GraphicTextRow.obtain();
+            gtr.set(sequence, region.startColumn, region.endColumn, editor.getTabWidth(), getSpans(line), editor.getTextPaint());
+            dest[1] = gtr.measureText(region.startColumn, column);
+            GraphicTextRow.recycle(gtr);
         } else {
             dest[0] = dest[1] = 0;
         }
         return dest;
     }
 
+    @Override
+    public int getRowCountForLine(int line) {
+        int row = findRow(line);
+        int count = 0;
+        while (row < rowTable.size() && rowTable.get(row).line == line) {
+            count++;
+            row++;
+        }
+        return count;
+    }
+
     static class RowRegion {
 
         final int startColumn;
@@ -252,11 +273,12 @@ class WordwrapLayout extends AbstractLayout {
 
     class WordwrapLayoutRowItr implements RowIterator {
 
-        final Row result;
-        int currentRow;
+        private final Row result;
+        private int currentRow;
+        private final int initRow;
 
         WordwrapLayoutRowItr(int initialRow) {
-            currentRow = initialRow;
+            initRow = currentRow = initialRow;
             result = new Row();
         }
 
@@ -279,6 +301,10 @@ class WordwrapLayout extends AbstractLayout {
             return currentRow >= 0 && currentRow < rowTable.size();
         }
 
+        @Override
+        public void reset() {
+            currentRow = initRow;
+        }
     }
 
 }
diff --git a/app/src/main/java/io/github/rosemoe/editor/syntax/EditorColorScheme.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/EditorColorScheme.java
similarity index 55%
rename from app/src/main/java/io/github/rosemoe/editor/syntax/EditorColorScheme.java
rename to editor/src/main/java/io/github/rosemoe/sora/widget/schemes/EditorColorScheme.java
index 6569e70bb..e67c2380e 100644
--- a/app/src/main/java/io/github/rosemoe/editor/syntax/EditorColorScheme.java
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/EditorColorScheme.java
@@ -1,25 +1,38 @@
 /*
- *  This file is part of AndroidIDE.
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
  *
- *  AndroidIDE is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
  *
- *  AndroidIDE is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
  */
-package io.github.rosemoe.editor.syntax;
+package io.github.rosemoe.sora.widget.schemes;
 
 import android.util.SparseIntArray;
 
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Objects;
 
+import io.github.rosemoe.sora.annotations.UnsupportedUserUsage;
+import io.github.rosemoe.sora.widget.CodeEditor;
+
 /**
  * This class manages the colors of editor.
  * You can use color ids that are not in pre-defined id pool due to new languages.
@@ -44,63 +57,46 @@ import java.util.Objects;
  * Note that new colors can be added in newer version of editor,
  * it is dangerous not to call super.applyDefault(), which can cause
  * newer editor works wrongly.
+ * <p>
+ * For more pre-defined color schemes, please turn to package io.github.rosemoe.editor.widget.schemes
+ * <p>
+ * Thanks to liyujiang-gzu (GitHub @liyujiang-gzu) for contribution to color schemes
  *
  * @author Rose
  */
 public class EditorColorScheme {
-    
-    public static final int DIAGNOSTIC_ERROR = 38;
-    public static final int DIAGNOSTIC_WARNING = 39;
-    public static final int DIAGNOSTIC_HINT = 40;
-    public static final int DIAGNOSTIC_INFO = 41;
-    
-    public static final int LOG_DEBUG = 5; // Text Normal
-    public static final int LOG_INFO = 32;
-    public static final int LOG_ERROR = 33;
-    public static final int LOG_WARNING = 34;
-    
-    public static final int STDERR = 53;
-    public static final int STDOUT = 54;
-    
+    //----------------Issue colors----------------
+    public static final int PROBLEM_TYPO = 37;
+    public static final int PROBLEM_WARNING = 36;
+    public static final int PROBLEM_ERROR = 35;
     //-----------------Highlight colors-----------
-    
-    public static final int XML_TAG = 52;
-    public static final int FIELD = 35;
-    public static final int STATIC_FIELD = 36;
-    public static final int PACKAGE_NAME = 37;
-    public static final int ENUM_TYPE = 42;
-    public static final int INTERFACE = 43;
-    public static final int ENUM = 44;
-    public static final int PARAMETER = 45;
-    public static final int CONSTRUCTOR = 46;
-    public static final int STATIC_INIT = 47;
-    public static final int INSTANCE_INIT = 48;
-    public static final int TYPE_PARAM = 49;
-    public static final int RESOURCE_VARIABLE = 50;
-    public static final int EXCEPTION_PARAM = 51;
+    public static final int ATTRIBUTE_VALUE = 34;
+    public static final int ATTRIBUTE_NAME = 33;
+    public static final int HTML_TAG = 32;
     public static final int ANNOTATION = 28;
-    public static final int METHOD_DECLARATION = 27;
-    public static final int METHOD_INVOCATION = 55;
-    public static final int TYPE_NAME = 26;
-    public static final int LOCAL_VARIABLE = 25;
+    public static final int FUNCTION_NAME = 27;
+    public static final int IDENTIFIER_NAME = 26;
+    public static final int IDENTIFIER_VAR = 25;
     public static final int LITERAL = 24;
     public static final int OPERATOR = 23;
     public static final int COMMENT = 22;
     public static final int KEYWORD = 21;
-    
     //-------------View colors---------------------
-    
     public static final int NON_PRINTABLE_CHAR = 31;
+
+    /**
+     * Use zero if the text color should not be changed
+     */
     public static final int TEXT_SELECTED = 30;
     public static final int MATCHED_TEXT_BACKGROUND = 29;
     public static final int AUTO_COMP_PANEL_CORNER = 20;
     public static final int AUTO_COMP_PANEL_BG = 19;
-    
+
     /**
      * No longer supported
      */
     public static final int LINE_BLOCK_LABEL = 18;
-    
+
     public static final int LINE_NUMBER_PANEL_TEXT = 17;
     public static final int LINE_NUMBER_PANEL = 16;
     public static final int BLOCK_LINE_CURRENT = 15;
@@ -118,87 +114,119 @@ public class EditorColorScheme {
     public static final int LINE_NUMBER_BACKGROUND = 3;
     public static final int LINE_NUMBER = 2;
     public static final int LINE_DIVIDER = 1;
-    
-    /**
-     * Default comment color
-     */
-    protected static int COMMENT_DEFAULT = 0xffa8a8a8;
-    
+
     /**
      * Min pre-defined color id
      */
     protected static final int START_COLOR_ID = 1;
-    
+
     /**
      * Max pre-defined color id
      */
-    protected static final int END_COLOR_ID = 102;
+    protected static final int END_COLOR_ID = 37;
     /**
      * Real color saver
      */
     protected final SparseIntArray mColors;
-    
-    private OnColorUpdateListener listener;
-    
-    public void setOnColorUpdateListener (OnColorUpdateListener listener) {
-        this.listener = Objects.requireNonNull (listener);
-    }
-    
-    public EditorColorScheme (OnColorUpdateListener listener) {
-        this.listener = listener;
-        mColors = new SparseIntArray ();
-        applyDefault ();
-    }
-    
     /**
-     * Subclasses only
+     * Host editor object
      */
-    protected EditorColorScheme () {
-        this (type -> {});
+    private final List<WeakReference<CodeEditor>> mEditors;
+
+    /**
+     * Create a new ColorScheme for the given editor
+     *
+     * @param editor Host editor
+     */
+    public EditorColorScheme(CodeEditor editor) {
+        this();
+        attachEditor(editor);
     }
-    
+
+    /**
+     * For sub-classes
+     */
+    public EditorColorScheme() {
+        mColors = new SparseIntArray();
+        mEditors = new ArrayList<>();
+        applyDefault();
+    }
+
+    /**
+     * Subscribe changes
+     *
+     * Called by editor
+     */
+    @UnsupportedUserUsage
+    public void attachEditor(CodeEditor editor) {
+        Objects.requireNonNull(editor);
+        for (var ref : mEditors) {
+            if (ref.get() == editor) {
+                return;
+            }
+        }
+        mEditors.add(new WeakReference<>(editor));
+        editor.onColorFullUpdate();
+    }
+
+    /**
+     * Unsubscribe changes
+     */
+    @UnsupportedUserUsage
+    public void detachEditor(CodeEditor editor) {
+        var itr = mEditors.iterator();
+        while (itr.hasNext()) {
+            if (itr.next().get() == editor) {
+                itr.remove();
+                break;
+            }
+        }
+    }
+
     /**
      * Apply default colors
      */
-    public void applyDefault () {
+    public void applyDefault() {
         for (int i = START_COLOR_ID; i <= END_COLOR_ID; i++) {
-            applyDefault (i);
+            applyDefault(i);
         }
     }
-    
+
     /**
      * Apply default color for the given type
      *
      * @param type The type
      */
-    private void applyDefault (int type) {
-        int color;
+    private void applyDefault(int type) {
+        int color = mColors.get(type);
         switch (type) {
-            case LINE_DIVIDER:
-                color = 0xFFdddddd;
-                break;
             case LINE_NUMBER:
-                color = 0xFF808080;
+                color = 0xFF505050;
                 break;
             case LINE_NUMBER_BACKGROUND:
-                color = 0xfff0f0f0;
+            case LINE_DIVIDER:
+                color = 0xeeeeeeee;
+                break;
+            case WHOLE_BACKGROUND:
+            case LINE_NUMBER_PANEL_TEXT:
+            case AUTO_COMP_PANEL_BG:
+            case AUTO_COMP_PANEL_CORNER:
+                color = 0xffffffff;
                 break;
             case OPERATOR:
                 color = 0xFF0066D6;
                 break;
-            case STDOUT:
-            case STDERR:
             case TEXT_NORMAL:
                 color = 0xFF333333;
                 break;
             case SELECTION_INSERT:
-                color = 0xFF03EBEB;
+                color = 0xdd536dfe;
                 break;
             case UNDERLINE:
                 color = 0xff000000;
                 break;
             case SELECTION_HANDLE:
-                color = 0xff03ebff;
+                color = 0xff536dfe;
                 break;
             case ANNOTATION:
                 color = 0xFF03A9F4;
@@ -207,13 +235,13 @@ public class EditorColorScheme {
                 color = 0x10000000;
                 break;
             case SELECTED_TEXT_BACKGROUND:
-                color = 0xFF9E9E9E;
+                color = 0x2D3F51B5;
                 break;
             case KEYWORD:
                 color = 0xFF2196F3;
                 break;
             case COMMENT:
-                color = COMMENT_DEFAULT;
+                color = 0xffa8a8a8;
                 break;
             case LITERAL:
                 color = 0xFF008080;
@@ -229,6 +257,7 @@ public class EditorColorScheme {
                 break;
             case LINE_BLOCK_LABEL:
             case SCROLL_BAR_TRACK:
+            case TEXT_SELECTED:
                 color = 0;
                 break;
             case LINE_NUMBER_PANEL:
@@ -237,88 +266,66 @@ public class EditorColorScheme {
             case BLOCK_LINE_CURRENT:
                 color = 0xff999999;
                 break;
-            case LOCAL_VARIABLE:
-            case TYPE_NAME:
-            case TYPE_PARAM:
-            case PARAMETER:
-            case METHOD_DECLARATION:
-            case ENUM_TYPE:
-            case INTERFACE:
-            case CONSTRUCTOR:
-            case EXCEPTION_PARAM:
-            case METHOD_INVOCATION:
+            case IDENTIFIER_VAR:
+            case IDENTIFIER_NAME:
+            case FUNCTION_NAME:
                 color = 0xff333333;
                 break;
             case MATCHED_TEXT_BACKGROUND:
                 color = 0xffffff00;
                 break;
             case NON_PRINTABLE_CHAR:
-                color = 0xff505050;
+                color = 0xeecccccc;
                 break;
-            case LOG_ERROR:
-                color = 0xffc50e29;
+            case PROBLEM_ERROR:
+                color = 0xaaff0000;
                 break;
-            case LOG_WARNING:
-                color = 0xffff7043;
+            case PROBLEM_WARNING:
+                color = 0xaafff100;
                 break;
-            case LOG_INFO:
-                color = 0xff4caf50;
+            case PROBLEM_TYPO:
+                color = 0x6600ff11;
                 break;
-            case FIELD:
-            case STATIC_FIELD:
-            case ENUM:
-                color = 0xFFF0BE4B;
-                break;
-            case PACKAGE_NAME:
-                color = 0xffF0BE4B;
-                break;
-            case DIAGNOSTIC_ERROR:
-                color = 0xfff44336;
-                break;
-            case DIAGNOSTIC_WARNING:
-                color = 0xffFF9800;
-                break;
-            case DIAGNOSTIC_INFO:
-                color = 0xff4CAF50;
-                break;
-            default:
-                color = 0xffffffff;
         }
-        
-        setColor (type, color);
+        setColor(type, color);
     }
-    
+
     /**
      * Apply a new color for the given type
      *
      * @param type  The type
      * @param color New color
      */
-    public void setColor (int type, int color) {
+    public void setColor(int type, int color) {
         //Do not change if the old value is the same as new value
         //due to avoid unnecessary invalidate() calls
-        int old = getColor (type);
+        int old = getColor(type);
         if (old == color) {
             return;
         }
-        
-        mColors.put (type, color);
-        
-        //Notify the listener
-        listener.onColorUpdated (type);
+
+        mColors.put(type, color);
+
+        //Notify the editor
+        var itr = mEditors.iterator();
+        while (itr.hasNext()) {
+            var editor = itr.next().get();
+            if (editor == null) {
+                itr.remove();
+            } else {
+                editor.onColorUpdated(type);
+            }
+        }
     }
-    
+
     /**
      * Get color by type
      *
      * @param type The type
      * @return The color for type
      */
-    public int getColor (int type) {
-        return mColors.get (type);
-    }
-    
-    public interface OnColorUpdateListener {
-        void onColorUpdated (int type);
+    public int getColor(int type) {
+        return mColors.get(type);
     }
+
 }
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeDarcula.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeDarcula.java
new file mode 100644
index 000000000..30646c4ca
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeDarcula.java
@@ -0,0 +1,62 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.schemes;
+
+/**
+ * ColorScheme for editor
+ * picked from Android Studio
+ * Thanks to liyujiang-gzu (GitHub @liyujiang-gzu)
+ */
+public class SchemeDarcula extends EditorColorScheme {
+
+    @Override
+    public void applyDefault() {
+        super.applyDefault();
+        setColor(ANNOTATION, 0xffbbb529);
+        setColor(FUNCTION_NAME, 0xffffffff);
+        setColor(IDENTIFIER_NAME, 0xffffffff);
+        setColor(IDENTIFIER_VAR, 0xff9876aa);
+        setColor(LITERAL, 0xff6a8759);
+        setColor(OPERATOR, 0xffffffff);
+        setColor(COMMENT, 0xff808080);
+        setColor(KEYWORD, 0xffcc7832);
+        setColor(WHOLE_BACKGROUND, 0xff2b2b2b);
+        setColor(TEXT_NORMAL, 0xffffffff);
+        setColor(LINE_NUMBER_BACKGROUND, 0xff313335);
+        setColor(LINE_NUMBER, 0xff606366);
+        setColor(LINE_DIVIDER, 0xff606366);
+        setColor(SCROLL_BAR_THUMB, 0xffa6a6a6);
+        setColor(SCROLL_BAR_THUMB_PRESSED, 0xff565656);
+        setColor(SELECTED_TEXT_BACKGROUND, 0xff3676b8);
+        setColor(MATCHED_TEXT_BACKGROUND, 0xff32593d);
+        setColor(CURRENT_LINE, 0xff323232);
+        setColor(SELECTION_INSERT, 0xffffffff);
+        setColor(SELECTION_HANDLE, 0xffffffff);
+        setColor(BLOCK_LINE, 0xff575757);
+        setColor(BLOCK_LINE_CURRENT, 0xdd575757);
+        setColor(NON_PRINTABLE_CHAR, 0xffdddddd);
+        setColor(TEXT_SELECTED, 0xffffffff);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeEclipse.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeEclipse.java
new file mode 100644
index 000000000..49037b9d3
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeEclipse.java
@@ -0,0 +1,58 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.schemes;
+
+/**
+ * ColorScheme for editor
+ * picked from Eclipse IDE for Java Developers Version 2019-12 (4.14.0)
+ * Thanks to liyujiang-gzu (GitHub @liyujiang-gzu)
+ */
+public class SchemeEclipse extends EditorColorScheme {
+
+    @Override
+    public void applyDefault() {
+        super.applyDefault();
+        setColor(ANNOTATION, 0xff646464);
+        setColor(FUNCTION_NAME, 0xff000000);
+        setColor(IDENTIFIER_NAME, 0xff000000);
+        setColor(IDENTIFIER_VAR, 0xffb8633e);
+        setColor(LITERAL, 0xff2a00ff);
+        setColor(OPERATOR, 0xff3a0000);
+        setColor(COMMENT, 0xff3f7f5f);
+        setColor(KEYWORD, 0xff7f0074);
+        setColor(WHOLE_BACKGROUND, 0xffffffff);
+        setColor(TEXT_NORMAL, 0xff000000);
+        setColor(LINE_NUMBER_BACKGROUND, 0xffffffff);
+        setColor(LINE_NUMBER, 0xff787878);
+        setColor(SELECTED_TEXT_BACKGROUND, 0xff3399ff);
+        setColor(MATCHED_TEXT_BACKGROUND, 0xffd4d4d4);
+        setColor(CURRENT_LINE, 0xffe8f2fe);
+        setColor(SELECTION_INSERT, 0xff03ebeb);
+        setColor(SELECTION_HANDLE, 0xff03ebeb);
+        setColor(BLOCK_LINE, 0xffd8d8d8);
+        setColor(BLOCK_LINE_CURRENT, 0);
+        setColor(TEXT_SELECTED, 0xffffffff);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeGitHub.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeGitHub.java
new file mode 100644
index 000000000..6bf6388a7
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeGitHub.java
@@ -0,0 +1,52 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.schemes;
+
+/**
+ * ColorScheme for editor
+ * picked from GitHub site
+ * Thanks to liyujiang-gzu (GitHub @liyujiang-gzu)
+ */
+public class SchemeGitHub extends EditorColorScheme {
+
+    @Override
+    public void applyDefault() {
+        super.applyDefault();
+        setColor(ANNOTATION, 0xff6f42c1);
+        setColor(FUNCTION_NAME, 0xff24292e);
+        setColor(IDENTIFIER_NAME, 0xff24292e);
+        setColor(IDENTIFIER_VAR, 0xff24292e);
+        setColor(LITERAL, 0xff032f62);
+        setColor(OPERATOR, 0xff005cc5);
+        setColor(COMMENT, 0xff6a737d);
+        setColor(KEYWORD, 0xffde3a49);
+        setColor(WHOLE_BACKGROUND, 0xffffffff);
+        setColor(TEXT_NORMAL, 0xff24292e);
+        setColor(LINE_NUMBER_BACKGROUND, 0xffffffff);
+        setColor(LINE_NUMBER, 0xffbec0c1);
+        setColor(SELECTION_INSERT, 0xffc7edcc);
+        setColor(SELECTION_HANDLE, 0xffc7edcc);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeNotepadXX.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeNotepadXX.java
new file mode 100644
index 000000000..7bad6b689
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeNotepadXX.java
@@ -0,0 +1,58 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.schemes;
+
+/**
+ * ColorScheme for editor
+ * picked from Notepad++ v7.8.1
+ * Thanks to liyujiang-gzu (GitHub @liyujiang-gzu)
+ */
+public class SchemeNotepadXX extends EditorColorScheme {
+
+    @Override
+    public void applyDefault() {
+        super.applyDefault();
+        setColor(ANNOTATION, 0xff0000ff);
+        setColor(FUNCTION_NAME, 0xff000000);
+        setColor(IDENTIFIER_NAME, 0xff000000);
+        setColor(IDENTIFIER_VAR, 0xff000000);
+        setColor(LITERAL, 0xff808080);
+        setColor(OPERATOR, 0xff0000ff);
+        setColor(COMMENT, 0xff008000);
+        setColor(KEYWORD, 0xff8000ff);
+        setColor(WHOLE_BACKGROUND, 0xffffffff);
+        setColor(TEXT_NORMAL, 0xff000000);
+        setColor(LINE_NUMBER_BACKGROUND, 0xffe4e4e4);
+        setColor(LINE_NUMBER, 0xff808080);
+        setColor(SELECTED_TEXT_BACKGROUND, 0xff75d975);
+        setColor(MATCHED_TEXT_BACKGROUND, 0xffc0c0c0);
+        setColor(CURRENT_LINE, 0xffe8e8ff);
+        setColor(SELECTION_INSERT, 0xff8000ff);
+        setColor(SELECTION_HANDLE, 0xff8000ff);
+        setColor(BLOCK_LINE, 0xffc0c0c0);
+        setColor(BLOCK_LINE_CURRENT, 0);
+        setColor(TEXT_SELECTED, 0xffffffff);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemePurple.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemePurple.java
new file mode 100644
index 000000000..c8ca7a22e
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemePurple.java
@@ -0,0 +1,56 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.schemes;
+
+public class SchemePurple extends EditorColorScheme {
+   public void applyDefault() {
+      super.applyDefault();
+      setColor(ANNOTATION, 0xFFFF6EAF);
+        setColor(FUNCTION_NAME, 0xFF2FA5FC);
+        setColor(IDENTIFIER_NAME, 0xFF2FA5FC);
+        setColor(IDENTIFIER_VAR, 0xFF0677BE);
+        setColor(LITERAL, 0xFF0AFC5B);
+        setColor(OPERATOR, 0xff08fff3);
+        setColor(COMMENT, 0xff05ff1a); // yellow
+        setColor(KEYWORD, 0xFFE0590B);
+        setColor(WHOLE_BACKGROUND, 0xFF000027);
+        setColor(TEXT_NORMAL, 0xFF68F9FF);
+        setColor(LINE_NUMBER_BACKGROUND, 0xFF000027);
+        setColor(LINE_NUMBER, 0xFF00C3F1);
+        setColor(LINE_DIVIDER, 0xFFFF5F00);
+        setColor(SCROLL_BAR_THUMB, 0xFF00002C);
+        setColor(SCROLL_BAR_THUMB_PRESSED, 0xFF00002C);
+        setColor(SELECTED_TEXT_BACKGROUND, 0xFF005E78);
+		// search result highlight color
+        setColor(MATCHED_TEXT_BACKGROUND, 0xFFFFC200);
+        setColor(CURRENT_LINE, 0xFF0075C9);
+        setColor(SELECTION_INSERT, 0xFF6AFFFF);
+        setColor(SELECTION_HANDLE, 0xFF6AFFFF);
+        setColor(BLOCK_LINE, 0xFF836BEB);
+        setColor(BLOCK_LINE_CURRENT, 0xff5accc6);
+        setColor(NON_PRINTABLE_CHAR, 0xFF000028);
+		
+		
+   }
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeVS2019.java b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeVS2019.java
new file mode 100644
index 000000000..f4e8a7824
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/schemes/SchemeVS2019.java
@@ -0,0 +1,62 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.schemes;
+
+/**
+ * ColorScheme for editor
+ * picked from Visual Studio 2019
+ * Thanks to liyujiang-gzu (GitHub @liyujiang-gzu)
+ */
+public class SchemeVS2019 extends EditorColorScheme {
+
+    @Override
+    public void applyDefault() {
+        super.applyDefault();
+        setColor(ANNOTATION, 0xff4ec9b0);
+        setColor(FUNCTION_NAME, 0xffdcdcdc);
+        setColor(IDENTIFIER_NAME, 0xff4ec9b0);
+        setColor(IDENTIFIER_VAR, 0xffdcdcaa);
+        setColor(LITERAL, 0xffd69d85);
+        setColor(OPERATOR, 0xffdcdcdc);
+        setColor(COMMENT, 0xff57a64a);
+        setColor(KEYWORD, 0xff569cd6);
+        setColor(WHOLE_BACKGROUND, 0xff1e1e1e);
+        setColor(TEXT_NORMAL, 0xffdcdcdc);
+        setColor(LINE_NUMBER_BACKGROUND, 0xff1e1e1e);
+        setColor(LINE_NUMBER, 0xff2b9eaf);
+        setColor(LINE_DIVIDER, 0xff2b9eaf);
+        setColor(SCROLL_BAR_THUMB, 0xff3e3e42);
+        setColor(SCROLL_BAR_THUMB_PRESSED, 0xff9e9e9e);
+        setColor(SELECTED_TEXT_BACKGROUND, 0xff3676b8);
+        setColor(MATCHED_TEXT_BACKGROUND, 0xff653306);
+        setColor(CURRENT_LINE, 0xff464646);
+        setColor(SELECTION_INSERT, 0xffffffff);
+        setColor(SELECTION_HANDLE, 0xffffffff);
+        setColor(BLOCK_LINE, 0xff717171);
+        setColor(BLOCK_LINE_CURRENT, 0);
+        setColor(NON_PRINTABLE_CHAR, 0xffdddddd);
+        setColor(TEXT_SELECTED, 0xffffffff);
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/style/SelectionHandleStyle.java b/editor/src/main/java/io/github/rosemoe/sora/widget/style/SelectionHandleStyle.java
new file mode 100644
index 000000000..6892d5f69
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/style/SelectionHandleStyle.java
@@ -0,0 +1,91 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.style;
+
+import android.graphics.Canvas;
+import android.graphics.RectF;
+
+import androidx.annotation.NonNull;
+
+import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
+
+/**
+ * Class for custom handle style
+ *
+ * @author Rosemoe
+ */
+public interface SelectionHandleStyle {
+
+    int HANDLE_TYPE_UNDEFINED = -1;
+    int HANDLE_TYPE_INSERT = 0;
+    int HANDLE_TYPE_LEFT = 1;
+    int HANDLE_TYPE_RIGHT = 2;
+
+    int ALIGN_CENTER = 0;
+    int ALIGN_LEFT = 1;
+    int ALIGN_RIGHT = 2;
+
+    /**
+     * Draw a handle to the given canvas and return descriptor of handle.
+     * @param canvas Canvas to draw
+     * @param handleType Type of handle being drawn at this position. Value can be {@link #HANDLE_TYPE_INSERT}, {@link #HANDLE_TYPE_LEFT}, {@link #HANDLE_TYPE_RIGHT} or {@link #HANDLE_TYPE_UNDEFINED}
+     * @param x The x of text position on canvas
+     * @param y The y of row bottom position on canvas
+     * @param rowHeight The height of a single row
+     * @param color The color of handle configured in {@link EditorColorScheme}
+     * @param descriptor The descriptor that should be adjusted
+     */
+    void draw(@NonNull Canvas canvas, int handleType, float x, float y, int rowHeight, int color, @NonNull HandleDescriptor descriptor);
+
+    /**
+     * The descriptor of a drawn handle on canvas
+     */
+    class HandleDescriptor {
+
+        /**
+         * The position of handle
+         */
+        public final RectF position = new RectF();
+        /**
+         * The alignment of the handle (of the x coordinate)
+         * For example, you can draw handle with align right of the x when you draw the left handle
+         * @see #ALIGN_CENTER
+         * @see #ALIGN_LEFT
+         * @see #ALIGN_RIGHT
+         */
+        public int alignment = ALIGN_CENTER;
+
+        public void set(float left, float top, float right, float bottom, int alignment) {
+            this.alignment = alignment;
+            position.set(left, top, right, bottom);
+        }
+
+        public void setEmpty() {
+            position.setEmpty();
+            this.alignment = ALIGN_CENTER;
+        }
+
+    }
+
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleDrop.java b/editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleDrop.java
new file mode 100644
index 000000000..852bc4ffd
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleDrop.java
@@ -0,0 +1,63 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.style.builtin;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffColorFilter;
+import android.graphics.drawable.Drawable;
+import android.util.TypedValue;
+
+import androidx.annotation.NonNull;
+
+import io.github.rosemoe.sora.R;
+import io.github.rosemoe.sora.widget.style.SelectionHandleStyle;
+
+public class HandleStyleDrop implements SelectionHandleStyle {
+
+    private final Drawable drawable;
+    private final int width;
+    private final int height;
+    private int lastColor = 0;
+
+    public HandleStyleDrop(Context context) {
+        drawable = context.getDrawable(R.drawable.ic_sora_handle_drop).mutate();
+        width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20f, context.getResources().getDisplayMetrics());
+        height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 30f, context.getResources().getDisplayMetrics());
+    }
+
+    @Override
+    public void draw(@NonNull Canvas canvas, int handleType, float x, float y, int rowHeight, int color, @NonNull HandleDescriptor descriptor) {
+        if (lastColor != color) {
+            lastColor = color;
+            drawable.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_ATOP));
+        }
+        var cx = (int)x;
+        var ty = (int)y;
+        drawable.setBounds(cx - width / 2, ty, cx + width / 2, ty + height);
+        drawable.draw(canvas);
+        descriptor.set(cx - width / 2, ty, cx + width / 2, ty + height, ALIGN_CENTER);
+    }
+}
diff --git a/editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleSideDrop.java b/editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleSideDrop.java
new file mode 100644
index 000000000..1eac6ec26
--- /dev/null
+++ b/editor/src/main/java/io/github/rosemoe/sora/widget/style/builtin/HandleStyleSideDrop.java
@@ -0,0 +1,60 @@
+/*
+ *    sora-editor - the awesome code editor for Android
+ *    https://github.com/Rosemoe/sora-editor
+ *    Copyright (C) 2020-2022  Rosemoe
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ *
+ *     Please contact Rosemoe by email 2073412493@qq.com if you need
+ *     additional information or have any questions
+ */
+package io.github.rosemoe.sora.widget.style.builtin;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.util.TypedValue;
+
+import androidx.annotation.NonNull;
+
+public class HandleStyleSideDrop extends HandleStyleDrop {
+    
+    private final int size;
+    private final Paint paint;
+
+    public HandleStyleSideDrop(Context context) {
+        super(context);
+        size = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 22f, context.getResources().getDisplayMetrics());
+        paint = new Paint();
+        paint.setAntiAlias(true);
+    }
+    
+    @Override
+    public void draw(@NonNull Canvas canvas, int handleType, float x, float y, int rowHeight, int color, @NonNull HandleDescriptor descriptor) {
+        float radius = size / 2;
+        paint.setColor(color);
+        if (handleType == HANDLE_TYPE_INSERT || handleType == HANDLE_TYPE_UNDEFINED) {
+            super.draw(canvas, handleType, x, y, rowHeight, color, descriptor);
+        } else {
+            boolean type = handleType == HANDLE_TYPE_LEFT;
+            float cx = type ? x - radius : x + radius;
+            canvas.drawCircle(cx, y + radius, radius, paint);
+            canvas.drawRect(type ? cx : cx - radius, y, type ? cx + radius : cx, y + radius, paint);
+            descriptor.set(cx - radius, y, cx + radius, y + 2 * radius, type ? ALIGN_LEFT : ALIGN_RIGHT);
+        }
+    }
+    
+}
diff --git a/editor/src/main/res/drawable/ic_more_vert_black_20dp.xml b/editor/src/main/res/drawable/ic_more_vert_black_20dp.xml
new file mode 100644
index 000000000..bbf79fa5c
--- /dev/null
+++ b/editor/src/main/res/drawable/ic_more_vert_black_20dp.xml
@@ -0,0 +1,28 @@
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector android:height="20dp" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="20dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#000000" android:pathData="M12,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM12,16c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2z"/>
+</vector>
diff --git a/editor/src/main/res/drawable/ic_sora_handle_drop.xml b/editor/src/main/res/drawable/ic_sora_handle_drop.xml
new file mode 100644
index 000000000..8ef73f2ec
--- /dev/null
+++ b/editor/src/main/res/drawable/ic_sora_handle_drop.xml
@@ -0,0 +1,40 @@
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="25dp"
+    android:height="37.5dp"
+    android:viewportWidth="20"
+    android:viewportHeight="30">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M10,20m-10,0a10,10 0,1 1,20 0a10,10 0,1 1,-20 0"/>
+  <path
+      android:fillColor="#FF000000"
+      android:strokeWidth="1"
+      android:pathData="m10,20l0,-20c-1.19,3.2 -2.55,5.59 -3.61,7.22c-2.58,3.97 -5.36,6.51 -6.2,11.31c-0.11,0.62 -0.16,1.13 -0.19,1.47c3.33,0 6.67,0 10,0z" />
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="m10,20l0,-20c1.19,3.2 2.56,5.59 3.62,7.22c2.58,3.97 5.37,6.51 6.22,11.31c0.11,0.62 0.16,1.13 0.19,1.47c-3.34,0 -6.69,0 -10.03,0z"/>
+</vector>
diff --git a/editor/src/main/res/drawable/magnifier_background.xml b/editor/src/main/res/drawable/magnifier_background.xml
new file mode 100644
index 000000000..6096ef1f0
--- /dev/null
+++ b/editor/src/main/res/drawable/magnifier_background.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?><!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+    <corners android:radius="8dp" />
+    <solid android:color="@android:color/white" />
+</shape>
diff --git a/editor/src/main/res/drawable/round_content_copy_20.xml b/editor/src/main/res/drawable/round_content_copy_20.xml
new file mode 100644
index 000000000..6f109e879
--- /dev/null
+++ b/editor/src/main/res/drawable/round_content_copy_20.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20"
+    android:tint="@android:color/tertiary_text_light">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M4.5,16.5h8.75c0.41,0 0.75,0.34 0.75,0.75l0,0c0,0.41 -0.34,0.75 -0.75,0.75H4.5C3.67,18 3,17.33 3,16.5V5.75C3,5.34 3.34,5 3.75,5h0C4.16,5 4.5,5.34 4.5,5.75V16.5zM17,3.5v10c0,0.83 -0.67,1.5 -1.5,1.5h-8C6.67,15 6,14.33 6,13.5v-10C6,2.67 6.67,2 7.5,2h8C16.33,2 17,2.67 17,3.5zM15.5,3.5h-8v10h8V3.5z"/>
+</vector>
diff --git a/editor/src/main/res/drawable/round_content_cut_20.xml b/editor/src/main/res/drawable/round_content_cut_20.xml
new file mode 100644
index 000000000..e2675b20c
--- /dev/null
+++ b/editor/src/main/res/drawable/round_content_cut_20.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20"
+    android:tint="@android:color/tertiary_text_light">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M12.12,9.29l5.59,-5.59c0.37,-0.37 0.39,-0.97 0.04,-1.37c-0.38,-0.43 -1.05,-0.45 -1.46,-0.05l-5.59,5.59L12.12,9.29z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M8.13,6.72C8.36,6.28 8.5,5.78 8.5,5.25C8.5,3.46 7.04,2 5.25,2S2,3.46 2,5.25S3.46,8.5 5.25,8.5c0.53,0 1.03,-0.14 1.47,-0.37L8.59,10l-1.87,1.87c-0.44,-0.23 -0.94,-0.37 -1.47,-0.37C3.46,11.5 2,12.96 2,14.75S3.46,18 5.25,18s3.25,-1.46 3.25,-3.25c0,-0.53 -0.14,-1.03 -0.37,-1.47L10,11.41l6.29,6.29c0.41,0.41 1.08,0.39 1.46,-0.05c0.35,-0.4 0.33,-0.99 -0.04,-1.37L8.13,6.72zM5.25,7C4.29,7 3.5,6.21 3.5,5.25S4.29,3.5 5.25,3.5S7,4.29 7,5.25S6.21,7 5.25,7zM5.25,16.5c-0.96,0 -1.75,-0.79 -1.75,-1.75S4.29,13 5.25,13S7,13.79 7,14.75S6.21,16.5 5.25,16.5zM10,10.5c-0.28,0 -0.5,-0.22 -0.5,-0.5S9.72,9.5 10,9.5s0.5,0.22 0.5,0.5S10.28,10.5 10,10.5z"/>
+</vector>
diff --git a/editor/src/main/res/drawable/round_content_paste_20.xml b/editor/src/main/res/drawable/round_content_paste_20.xml
new file mode 100644
index 000000000..a9bf0dc08
--- /dev/null
+++ b/editor/src/main/res/drawable/round_content_paste_20.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20"
+    android:tint="@android:color/tertiary_text_light">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M15.5,3h-3.57c-0.22,-0.86 -1,-1.5 -1.93,-1.5C9.07,1.5 8.29,2.14 8.07,3H4.5C3.67,3 3,3.67 3,4.5v11C3,16.33 3.67,17 4.5,17h11c0.83,0 1.5,-0.67 1.5,-1.5v-11C17,3.67 16.33,3 15.5,3zM10.75,3.75c0,0.41 -0.34,0.75 -0.75,0.75S9.25,4.16 9.25,3.75C9.25,3.34 9.59,3 10,3S10.75,3.34 10.75,3.75zM15.5,15.5h-11v-11H6V6c0,0.55 0.45,1 1,1h6c0.55,0 1,-0.45 1,-1V4.5h1.5V15.5z"/>
+</vector>
diff --git a/editor/src/main/res/drawable/round_save_20.xml b/editor/src/main/res/drawable/round_save_20.xml
new file mode 100644
index 000000000..994f38a24
--- /dev/null
+++ b/editor/src/main/res/drawable/round_save_20.xml
@@ -0,0 +1,34 @@
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20"
+    android:tint="@android:color/tertiary_text_light">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M13.38,3H4.5C3.67,3 3,3.67 3,4.5v11C3,16.33 3.67,17 4.5,17h11c0.83,0 1.5,-0.67 1.5,-1.5V6.62c0,-0.4 -0.16,-0.78 -0.44,-1.06l-2.12,-2.12C14.16,3.16 13.78,3 13.38,3zM6.5,5.5h5c0.55,0 1,0.45 1,1v1c0,0.55 -0.45,1 -1,1h-5c-0.55,0 -1,-0.45 -1,-1v-1C5.5,5.95 5.95,5.5 6.5,5.5zM10,14.75c-1.24,0 -2.25,-1.01 -2.25,-2.25s1.01,-2.25 2.25,-2.25s2.25,1.01 2.25,2.25S11.24,14.75 10,14.75z"/>
+</vector>
diff --git a/editor/src/main/res/drawable/round_select_all_20.xml b/editor/src/main/res/drawable/round_select_all_20.xml
new file mode 100644
index 000000000..67c44a390
--- /dev/null
+++ b/editor/src/main/res/drawable/round_select_all_20.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20"
+    android:tint="@android:color/tertiary_text_light">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M7,14h6c0.55,0 1,-0.45 1,-1V7c0,-0.55 -0.45,-1 -1,-1H7C6.45,6 6,6.45 6,7v6C6,13.55 6.45,14 7,14zM7.5,7.5h5v5h-5V7.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M6.12,3h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M3,4.5h1.5V3C3.67,3 3,3.67 3,4.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M4.5,17v-1.5H3C3,16.33 3.67,17 4.5,17z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M3,12.38h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M3,9.25h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M3,6.12h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M15.5,12.38h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M15.5,9.25h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M15.5,6.12h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M15.5,3v1.5H17C17,3.67 16.33,3 15.5,3z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M12.38,3h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M9.25,3h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M6.12,15.5h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M15.5,17c0.83,0 1.5,-0.67 1.5,-1.5h-1.5V17z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M12.38,15.5h1.5v1.5h-1.5z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M9.25,15.5h1.5v1.5h-1.5z"/>
+</vector>
diff --git a/editor/src/main/res/layout/default_completion_result_item.xml b/editor/src/main/res/layout/default_completion_result_item.xml
new file mode 100644
index 000000000..3a65bdb34
--- /dev/null
+++ b/editor/src/main/res/layout/default_completion_result_item.xml
@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<LinearLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="fill_parent"
+	android:layout_height="wrap_content"
+	android:orientation="horizontal"
+	android:gravity="center_vertical"
+	android:paddingTop="2dp"
+	android:paddingBottom="2dp">
+
+	<ImageView
+		android:layout_height="24dp"
+		android:layout_width="24dp"
+		android:src="@android:drawable/ic_delete"
+		android:layout_marginLeft="4dp"
+		android:layout_marginRight="4dp"
+		android:id="@+id/result_item_image" />
+
+	<LinearLayout
+		android:layout_height="wrap_content"
+		android:layout_width="match_parent"
+		android:orientation="vertical"
+		android:gravity="center_vertical"
+		android:paddingLeft="8dp"
+		android:paddingRight="8dp">
+
+		<TextView
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="Medium Text"
+			android:textColor="#FF000000"
+			android:id="@+id/result_item_label"
+			android:textSize="16sp"/>
+
+		<TextView
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="Small Text"
+			android:id="@+id/result_item_desc"
+			android:textSize="12sp"
+			android:layout_marginTop="4dp"/>
+
+	</LinearLayout>
+
+</LinearLayout>
+
diff --git a/editor/src/main/res/layout/magnifier_popup.xml b/editor/src/main/res/layout/magnifier_popup.xml
new file mode 100644
index 000000000..17b39e56e
--- /dev/null
+++ b/editor/src/main/res/layout/magnifier_popup.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:elevation="4dp"
+    android:background="@drawable/magnifier_background">
+
+    <ImageView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/magnifier_image_view"/>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/editor/src/main/res/layout/text_compose_panel.xml b/editor/src/main/res/layout/text_compose_panel.xml
new file mode 100644
index 000000000..f8639a005
--- /dev/null
+++ b/editor/src/main/res/layout/text_compose_panel.xml
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<LinearLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="wrap_content"
+	android:layout_height="match_parent"
+	android:orientation="horizontal"
+	android:gravity="center_vertical"
+	android:background="@drawable/magnifier_background">
+
+	<HorizontalScrollView
+		android:layout_height="match_parent"
+		android:layout_width="wrap_content">
+
+		<LinearLayout
+			android:layout_height="match_parent"
+			android:layout_width="wrap_content"
+			android:orientation="horizontal"
+			android:gravity="center_vertical">
+
+			<Button
+				android:id="@+id/panel_btn_select_all"
+				android:layout_width="55dp"
+				android:layout_height="wrap_content"
+				android:text="@string/selectAll"
+				android:textColor="@color/textActionNameColor"
+				android:textSize="9sp"
+				android:drawableTop="@drawable/round_select_all_20"
+				android:drawablePadding="-4dp"
+				android:paddingTop="4dp"
+				android:background="#00000000" />
+
+			<Button
+				android:id="@+id/panel_btn_copy"
+				android:layout_width="55dp"
+				android:layout_height="wrap_content"
+				android:text="@string/copy"
+				android:textColor="@color/textActionNameColor"
+				android:textSize="9sp"
+				android:drawableTop="@drawable/round_content_copy_20"
+				android:drawablePadding="-4dp"
+				android:paddingTop="4dp"
+				android:background="#00000000" />
+
+			<Button
+				android:id="@+id/panel_btn_paste"
+				android:layout_width="55dp"
+				android:layout_height="wrap_content"
+				android:text="@string/paste"
+				android:textColor="@color/textActionNameColor"
+				android:textSize="9sp"
+				android:drawableTop="@drawable/round_content_paste_20"
+				android:drawablePadding="-4dp"
+				android:paddingTop="4dp"
+				android:background="#00000000" />
+
+			<Button
+				android:id="@+id/panel_btn_cut"
+				android:layout_width="55dp"
+				android:layout_height="wrap_content"
+				android:text="@string/cut"
+				android:textColor="@color/textActionNameColor"
+				android:textSize="9sp"
+				android:drawableTop="@drawable/round_content_cut_20"
+				android:drawablePadding="-4dp"
+				android:paddingTop="4dp"
+				android:background="#00000000" />
+
+		</LinearLayout>
+
+	</HorizontalScrollView>
+
+</LinearLayout>
+
diff --git a/editor/src/main/res/values-zh/strings.xml b/editor/src/main/res/values-zh/strings.xml
new file mode 100644
index 000000000..012602209
--- /dev/null
+++ b/editor/src/main/res/values-zh/strings.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?><!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<resources>
+    <string name="paste">粘贴</string>
+    <string name="copy">复制</string>
+    <string name="selectAll">全选</string>
+    <string name="cut">剪切</string>
+    <string name="last">上个</string>
+    <string name="next">下个</string>
+    <string name="replace">替换</string>
+    <string name="replaceAll">替换全部</string>
+    <string name="replacement">替换文本</string>
+    <string name="cancel">取消</string>
+    <string name="text_to_search">欲搜索文本</string>
+</resources>
\ No newline at end of file
diff --git a/editor/src/main/res/values/attrs.xml b/editor/src/main/res/values/attrs.xml
new file mode 100644
index 000000000..6989db7bf
--- /dev/null
+++ b/editor/src/main/res/values/attrs.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<resources>
+
+    <declare-styleable name="editor">
+        <attr name="text" format="string"/>
+        <attr name="textSize" format="dimension"/>
+        <attr name="dividerWidth" format="dimension"/>
+        <attr name="lineNumberVisible" format="boolean"/>
+        <attr name="autoCompleteEnabled" format="boolean"/>
+        <attr name="symbolCompletionEnabled" format="boolean"/>
+        <attr name="cursorBlinkPeriod" format="integer"/>
+        <attr name="scrollbarsEnabled" format="boolean"/>
+        <attr name="verticalScrollbarEnabled" format="boolean"/>
+        <attr name="horizontalScrollbarEnabled" format="boolean"/>
+    </declare-styleable>
+
+</resources>
\ No newline at end of file
diff --git a/editor/src/main/res/values/colors.xml b/editor/src/main/res/values/colors.xml
new file mode 100644
index 000000000..316124ae3
--- /dev/null
+++ b/editor/src/main/res/values/colors.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?><!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<resources>
+    <color name="textActionNameColor">@android:color/tertiary_text_light</color>
+</resources>
\ No newline at end of file
diff --git a/editor/src/main/res/values/dimens.xml b/editor/src/main/res/values/dimens.xml
new file mode 100644
index 000000000..48e66ea93
--- /dev/null
+++ b/editor/src/main/res/values/dimens.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<resources>
+</resources>
\ No newline at end of file
diff --git a/editor/src/main/res/values/strings.xml b/editor/src/main/res/values/strings.xml
new file mode 100644
index 000000000..de51dc50e
--- /dev/null
+++ b/editor/src/main/res/values/strings.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<resources>
+
+    <item name="paste" type="string">Paste</item>
+    <item name="copy" type="string">Copy</item>
+    <item name="selectAll" type="string" formatted="true">Select All</item>
+    <item name="saveToProject" type="string" translatable="false" >Project</item>
+    <item name="cut" type="string">Cut</item>
+    <item name="last" type="string">Last</item>
+    <item name="next" type="string">Next</item>
+    <item name="replace" type="string">Replace</item>
+    <item name="replaceAll" type="string">Replace All</item>
+    <item name="replacement" type="string">Replacement</item>
+    <item name="cancel" type="string">Cancel</item>
+    <item name="text_to_search" type="string">Text to search</item>
+
+    <item name="more" type="string" translatable="false" >More</item>
+
+</resources>
\ No newline at end of file
diff --git a/editor/src/main/res/values/style.xml b/editor/src/main/res/values/style.xml
new file mode 100644
index 000000000..9831c5d02
--- /dev/null
+++ b/editor/src/main/res/values/style.xml
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="utf-8"?><!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~    sora-editor - the awesome code editor for Android
+  ~    https://github.com/Rosemoe/sora-editor
+  ~    Copyright (C) 2020-2022  Rosemoe
+  ~
+  ~     This library is free software; you can redistribute it and/or
+  ~     modify it under the terms of the GNU Lesser General Public
+  ~     License as published by the Free Software Foundation; either
+  ~     version 2.1 of the License, or (at your option) any later version.
+  ~
+  ~     This library is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  ~     Lesser General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Lesser General Public
+  ~     License along with this library; if not, write to the Free Software
+  ~     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  ~     USA
+  ~
+  ~     Please contact Rosemoe by email 2073412493@qq.com if you need
+  ~     additional information or have any questions
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
+
+<resources>
+    <style name="HorizontalDivider">
+        <item name="android:layout_width">match_parent</item>
+        <item name="android:layout_height">1dp</item>
+        <item name="android:background">?android:attr/listDivider</item>
+    </style>
+
+    <style name="VerticalDivider">
+        <item name="android:layout_width">0.8dp</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:background">?android:attr/listDivider</item>
+    </style>
+
+    <style name="TextButton.IconOnly" parent="Widget.MaterialComponents.Button.TextButton">
+        <item name="iconPadding">0dp</item>
+        <item name="cornerFamily">cut</item>
+        <item name="android:insetTop">0dp</item>
+        <item name="android:insetBottom">0dp</item>
+        <item name="android:paddingLeft">12dp</item>
+        <item name="android:paddingRight">12dp</item>
+        <item name="android:paddingTop">8dp</item>
+        <item name="android:paddingBottom">8dp</item>
+        <item name="android:minWidth">48dp</item>
+        <item name="android:minHeight">48dp</item>
+    </style>
+
+    <style name="OutlinedButton.IconOnly" parent="Widget.MaterialComponents.Button.OutlinedButton">
+        <item name="iconPadding">0dp</item>
+        <item name="android:insetTop">0dp</item>
+        <item name="android:insetBottom">0dp</item>
+        <item name="android:paddingLeft">12dp</item>
+        <item name="android:paddingRight">12dp</item>
+        <item name="android:minWidth">48dp</item>
+        <item name="android:minHeight">48dp</item>
+    </style>
+
+    <style name="RoundOutlinedButton.IconOnly" parent="">
+        <item name="cornerFamily">rounded</item>
+        <item name="cornerSize">50%</item>
+        <item name="android:maxWidth">48dp</item>
+        <item name="android:maxHeight">48dp</item>
+    </style>
+
+    <style name="ButtonBar.IconOnly.Left" parent="">
+        <item name="cornerFamily">rounded</item>
+        <item name="cornerSizeTopLeft">8dp</item>
+        <item name="cornerSizeTopRight">0dp</item>
+        <item name="cornerSizeBottomLeft">8dp</item>
+        <item name="cornerSizeBottomRight">0dp</item>
+    </style>
+
+    <style name="ButtonBar.IconOnly.Middle" parent="">
+        <item name="cornerFamily">rounded</item>
+        <item name="cornerSize">0dp</item>
+    </style>
+
+    <style name="ButtonBar.IconOnly.Right" parent="">
+        <item name="cornerFamily">rounded</item>
+        <item name="cornerSizeTopLeft">0dp</item>
+        <item name="cornerSizeTopRight">8dp</item>
+        <item name="cornerSizeBottomLeft">0dp</item>
+        <item name="cornerSizeBottomRight">8dp</item>
+    </style>
+</resources>
\ No newline at end of file
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/util/NoCodeAnalyzer.kt b/editor/src/test/java/io/github/rosemoe/sora/ExampleUnitTest.java
similarity index 65%
rename from lsp/api/src/main/java/com/itsaky/lsp/util/NoCodeAnalyzer.kt
rename to editor/src/test/java/io/github/rosemoe/sora/ExampleUnitTest.java
index ff800c7fc..86b2a37b4 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/util/NoCodeAnalyzer.kt
+++ b/editor/src/test/java/io/github/rosemoe/sora/ExampleUnitTest.java
@@ -15,16 +15,20 @@
  *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.itsaky.lsp.util
+package io.github.rosemoe.sora;
 
-import com.itsaky.lsp.api.ICodeAnalyzer
-import com.itsaky.lsp.models.AnalyzeParams
-import com.itsaky.lsp.models.AnalyzeResult
-import java.util.*
+import org.junit.Test;
+
+import static org.junit.Assert.*;
 
 /**
- * @author Akash Yadav
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
  */
-class NoCodeAnalyzer : ICodeAnalyzer {
-    override fun analyze(params: AnalyzeParams?): AnalyzeResult = AnalyzeResult(Collections.emptyList(), Collections.emptyList());
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect () {
+        assertEquals (4, 2 + 2);
+    }
 }
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.g4 b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.g4
index 1c68f2a62..fecb3b2cd 100644
--- a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.g4
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.g4
@@ -30,6 +30,7 @@
 lexer grammar XMLLexer;
 
 // Default "mode": Everything OUTSIDE of a tag
+COLON       :   ':'                                         ;
 COMMENT     :   '<!--' .*? '-->' ;
 CDATA       :   '<![CDATA[' .*? ']]>' ;
 /** Scarf all DTD stuff, Entity Declarations like <!ENTITY ...>,
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.interp b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.interp
index 0ba3bc492..00429681e 100644
--- a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.interp
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.interp
@@ -1,5 +1,6 @@
 token literal names:
 null
+':'
 null
 null
 null
@@ -22,6 +23,7 @@ null
 
 token symbolic names:
 null
+COLON
 COMMENT
 CDATA
 DTD
@@ -43,6 +45,7 @@ S
 PI
 
 rule names:
+COLON
 COMMENT
 CDATA
 DTD
@@ -79,4 +82,4 @@ INSIDE
 PROC_INSTR
 
 atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 21, 240, 8, 1, 8, 1, 8, 1, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13, 9, 13, 4, 14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9, 18, 4, 19, 9, 19, 4, 20, 9, 20, 4, 21, 9, 21, 4, 22, 9, 22, 4, 23, 9, 23, 4, 24, 9, 24, 4, 25, 9, 25, 4, 26, 9, 26, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 7, 2, 62, 10, 2, 12, 2, 14, 2, 65, 11, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 7, 3, 82, 10, 3, 12, 3, 14, 3, 85, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 4, 7, 4, 95, 10, 4, 12, 4, 14, 4, 98, 11, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 5, 3, 5, 3, 5, 3, 5, 3, 6, 3, 6, 3, 6, 3, 6, 6, 6, 112, 10, 6, 13, 6, 14, 6, 113, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 6, 6, 123, 10, 6, 13, 6, 14, 6, 124, 3, 6, 3, 6, 5, 6, 129, 10, 6, 3, 7, 3, 7, 5, 7, 133, 10, 7, 3, 7, 6, 7, 136, 10, 7, 13, 7, 14, 7, 137, 3, 8, 3, 8, 3, 8, 3, 8, 3, 9, 3, 9, 3, 9, 3, 9, 3, 9, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 12, 6, 12, 168, 10, 12, 13, 12, 14, 12, 169, 3, 13, 3, 13, 3, 13, 3, 13, 3, 14, 3, 14, 3, 14, 3, 14, 3, 14, 3, 15, 3, 15, 3, 15, 3, 15, 3, 15, 3, 16, 3, 16, 3, 17, 3, 17, 3, 18, 3, 18, 7, 18, 192, 10, 18, 12, 18, 14, 18, 195, 11, 18, 3, 18, 3, 18, 3, 18, 7, 18, 200, 10, 18, 12, 18, 14, 18, 203, 11, 18, 3, 18, 5, 18, 206, 10, 18, 3, 19, 3, 19, 7, 19, 210, 10, 19, 12, 19, 14, 19, 213, 11, 19, 3, 20, 3, 20, 3, 20, 3, 20, 3, 21, 3, 21, 3, 22, 3, 22, 3, 23, 3, 23, 3, 23, 3, 23, 5, 23, 227, 10, 23, 3, 24, 5, 24, 230, 10, 24, 3, 25, 3, 25, 3, 25, 3, 25, 3, 25, 3, 26, 3, 26, 3, 26, 3, 26, 5, 63, 83, 96, 2, 27, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 2, 25, 12, 27, 13, 29, 14, 31, 15, 33, 16, 35, 17, 37, 18, 39, 19, 41, 20, 43, 2, 45, 2, 47, 2, 49, 2, 51, 21, 53, 2, 5, 2, 3, 4, 12, 4, 2, 11, 11, 34, 34, 4, 2, 40, 40, 62, 62, 4, 2, 36, 36, 62, 62, 4, 2, 41, 41, 62, 62, 5, 2, 11, 12, 15, 15, 34, 34, 5, 2, 50, 59, 67, 72, 99, 104, 3, 2, 50, 59, 4, 2, 47, 48, 97, 97, 5, 2, 185, 185, 770, 881, 8257, 8258, 10, 2, 60, 60, 67, 92, 99, 124, 8306, 8593, 11266, 12273, 12291, 55297, 63746, 64977, 65010, 65535, 2, 250, 2, 5, 3, 2, 2, 2, 2, 7, 3, 2, 2, 2, 2, 9, 3, 2, 2, 2, 2, 11, 3, 2, 2, 2, 2, 13, 3, 2, 2, 2, 2, 15, 3, 2, 2, 2, 2, 17, 3, 2, 2, 2, 2, 19, 3, 2, 2, 2, 2, 21, 3, 2, 2, 2, 2, 23, 3, 2, 2, 2, 2, 25, 3, 2, 2, 2, 3, 27, 3, 2, 2, 2, 3, 29, 3, 2, 2, 2, 3, 31, 3, 2, 2, 2, 3, 33, 3, 2, 2, 2, 3, 35, 3, 2, 2, 2, 3, 37, 3, 2, 2, 2, 3, 39, 3, 2, 2, 2, 3, 41, 3, 2, 2, 2, 4, 51, 3, 2, 2, 2, 4, 53, 3, 2, 2, 2, 5, 55, 3, 2, 2, 2, 7, 70, 3, 2, 2, 2, 9, 90, 3, 2, 2, 2, 11, 103, 3, 2, 2, 2, 13, 128, 3, 2, 2, 2, 15, 135, 3, 2, 2, 2, 17, 139, 3, 2, 2, 2, 19, 143, 3, 2, 2, 2, 21, 148, 3, 2, 2, 2, 23, 158, 3, 2, 2, 2, 25, 167, 3, 2, 2, 2, 27, 171, 3, 2, 2, 2, 29, 175, 3, 2, 2, 2, 31, 180, 3, 2, 2, 2, 33, 185, 3, 2, 2, 2, 35, 187, 3, 2, 2, 2, 37, 205, 3, 2, 2, 2, 39, 207, 3, 2, 2, 2, 41, 214, 3, 2, 2, 2, 43, 218, 3, 2, 2, 2, 45, 220, 3, 2, 2, 2, 47, 226, 3, 2, 2, 2, 49, 229, 3, 2, 2, 2, 51, 231, 3, 2, 2, 2, 53, 236, 3, 2, 2, 2, 55, 56, 7, 62, 2, 2, 56, 57, 7, 35, 2, 2, 57, 58, 7, 47, 2, 2, 58, 59, 7, 47, 2, 2, 59, 63, 3, 2, 2, 2, 60, 62, 11, 2, 2, 2, 61, 60, 3, 2, 2, 2, 62, 65, 3, 2, 2, 2, 63, 64, 3, 2, 2, 2, 63, 61, 3, 2, 2, 2, 64, 66, 3, 2, 2, 2, 65, 63, 3, 2, 2, 2, 66, 67, 7, 47, 2, 2, 67, 68, 7, 47, 2, 2, 68, 69, 7, 64, 2, 2, 69, 6, 3, 2, 2, 2, 70, 71, 7, 62, 2, 2, 71, 72, 7, 35, 2, 2, 72, 73, 7, 93, 2, 2, 73, 74, 7, 69, 2, 2, 74, 75, 7, 70, 2, 2, 75, 76, 7, 67, 2, 2, 76, 77, 7, 86, 2, 2, 77, 78, 7, 67, 2, 2, 78, 79, 7, 93, 2, 2, 79, 83, 3, 2, 2, 2, 80, 82, 11, 2, 2, 2, 81, 80, 3, 2, 2, 2, 82, 85, 3, 2, 2, 2, 83, 84, 3, 2, 2, 2, 83, 81, 3, 2, 2, 2, 84, 86, 3, 2, 2, 2, 85, 83, 3, 2, 2, 2, 86, 87, 7, 95, 2, 2, 87, 88, 7, 95, 2, 2, 88, 89, 7, 64, 2, 2, 89, 8, 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\ No newline at end of file
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3, 8, 6, 8, 140, 10, 8, 13, 8, 14, 8, 141, 3, 9, 3, 9, 3, 9, 3, 9, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 12, 3, 12, 3, 12, 3, 12, 3, 12, 3, 12, 3, 12, 3, 12, 3, 13, 6, 13, 172, 10, 13, 13, 13, 14, 13, 173, 3, 14, 3, 14, 3, 14, 3, 14, 3, 15, 3, 15, 3, 15, 3, 15, 3, 15, 3, 16, 3, 16, 3, 16, 3, 16, 3, 16, 3, 17, 3, 17, 3, 18, 3, 18, 3, 19, 3, 19, 7, 19, 196, 10, 19, 12, 19, 14, 19, 199, 11, 19, 3, 19, 3, 19, 3, 19, 7, 19, 204, 10, 19, 12, 19, 14, 19, 207, 11, 19, 3, 19, 5, 19, 210, 10, 19, 3, 20, 3, 20, 7, 20, 214, 10, 20, 12, 20, 14, 20, 217, 11, 20, 3, 21, 3, 21, 3, 21, 3, 21, 3, 22, 3, 22, 3, 23, 3, 23, 3, 24, 3, 24, 3, 24, 3, 24, 5, 24, 231, 10, 24, 3, 25, 5, 25, 234, 10, 25, 3, 26, 3, 26, 3, 26, 3, 26, 3, 26, 3, 27, 3, 27, 3, 27, 3, 27, 5, 67, 87, 100, 2, 28, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12, 25, 2, 27, 13, 29, 14, 31, 15, 33, 16, 35, 17, 37, 18, 39, 19, 41, 20, 43, 21, 45, 2, 47, 2, 49, 2, 51, 2, 53, 22, 55, 2, 5, 2, 3, 4, 12, 4, 2, 11, 11, 34, 34, 4, 2, 40, 40, 62, 62, 4, 2, 36, 36, 62, 62, 4, 2, 41, 41, 62, 62, 5, 2, 11, 12, 15, 15, 34, 34, 5, 2, 50, 59, 67, 72, 99, 104, 3, 2, 50, 59, 4, 2, 47, 48, 97, 97, 5, 2, 185, 185, 770, 881, 8257, 8258, 10, 2, 60, 60, 67, 92, 99, 124, 8306, 8593, 11266, 12273, 12291, 55297, 63746, 64977, 65010, 65535, 2, 254, 2, 5, 3, 2, 2, 2, 2, 7, 3, 2, 2, 2, 2, 9, 3, 2, 2, 2, 2, 11, 3, 2, 2, 2, 2, 13, 3, 2, 2, 2, 2, 15, 3, 2, 2, 2, 2, 17, 3, 2, 2, 2, 2, 19, 3, 2, 2, 2, 2, 21, 3, 2, 2, 2, 2, 23, 3, 2, 2, 2, 2, 25, 3, 2, 2, 2, 2, 27, 3, 2, 2, 2, 3, 29, 3, 2, 2, 2, 3, 31, 3, 2, 2, 2, 3, 33, 3, 2, 2, 2, 3, 35, 3, 2, 2, 2, 3, 37, 3, 2, 2, 2, 3, 39, 3, 2, 2, 2, 3, 41, 3, 2, 2, 2, 3, 43, 3, 2, 2, 2, 4, 53, 3, 2, 2, 2, 4, 55, 3, 2, 2, 2, 5, 57, 3, 2, 2, 2, 7, 59, 3, 2, 2, 2, 9, 74, 3, 2, 2, 2, 11, 94, 3, 2, 2, 2, 13, 107, 3, 2, 2, 2, 15, 132, 3, 2, 2, 2, 17, 139, 3, 2, 2, 2, 19, 143, 3, 2, 2, 2, 21, 147, 3, 2, 2, 2, 23, 152, 3, 2, 2, 2, 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3, 2, 2, 171, 170, 3, 2, 2, 2, 172, 173, 3, 2, 2, 2, 173, 171, 3, 2, 2, 2, 173, 174, 3, 2, 2, 2, 174, 28, 3, 2, 2, 2, 175, 176, 7, 64, 2, 2, 176, 177, 3, 2, 2, 2, 177, 178, 8, 14, 6, 2, 178, 30, 3, 2, 2, 2, 179, 180, 7, 65, 2, 2, 180, 181, 7, 64, 2, 2, 181, 182, 3, 2, 2, 2, 182, 183, 8, 15, 6, 2, 183, 32, 3, 2, 2, 2, 184, 185, 7, 49, 2, 2, 185, 186, 7, 64, 2, 2, 186, 187, 3, 2, 2, 2, 187, 188, 8, 16, 6, 2, 188, 34, 3, 2, 2, 2, 189, 190, 7, 49, 2, 2, 190, 36, 3, 2, 2, 2, 191, 192, 7, 63, 2, 2, 192, 38, 3, 2, 2, 2, 193, 197, 7, 36, 2, 2, 194, 196, 10, 4, 2, 2, 195, 194, 3, 2, 2, 2, 196, 199, 3, 2, 2, 2, 197, 195, 3, 2, 2, 2, 197, 198, 3, 2, 2, 2, 198, 200, 3, 2, 2, 2, 199, 197, 3, 2, 2, 2, 200, 210, 7, 36, 2, 2, 201, 205, 7, 41, 2, 2, 202, 204, 10, 5, 2, 2, 203, 202, 3, 2, 2, 2, 204, 207, 3, 2, 2, 2, 205, 203, 3, 2, 2, 2, 205, 206, 3, 2, 2, 2, 206, 208, 3, 2, 2, 2, 207, 205, 3, 2, 2, 2, 208, 210, 7, 41, 2, 2, 209, 193, 3, 2, 2, 2, 209, 201, 3, 2, 2, 2, 210, 40, 3, 2, 2, 2, 211, 215, 5, 51, 25, 2, 212, 214, 5, 49, 24, 2, 213, 212, 3, 2, 2, 2, 214, 217, 3, 2, 2, 2, 215, 213, 3, 2, 2, 2, 215, 216, 3, 2, 2, 2, 216, 42, 3, 2, 2, 2, 217, 215, 3, 2, 2, 2, 218, 219, 9, 6, 2, 2, 219, 220, 3, 2, 2, 2, 220, 221, 8, 21, 2, 2, 221, 44, 3, 2, 2, 2, 222, 223, 9, 7, 2, 2, 223, 46, 3, 2, 2, 2, 224, 225, 9, 8, 2, 2, 225, 48, 3, 2, 2, 2, 226, 231, 5, 51, 25, 2, 227, 231, 9, 9, 2, 2, 228, 231, 5, 47, 23, 2, 229, 231, 9, 10, 2, 2, 230, 226, 3, 2, 2, 2, 230, 227, 3, 2, 2, 2, 230, 228, 3, 2, 2, 2, 230, 229, 3, 2, 2, 2, 231, 50, 3, 2, 2, 2, 232, 234, 9, 11, 2, 2, 233, 232, 3, 2, 2, 2, 234, 52, 3, 2, 2, 2, 235, 236, 7, 65, 2, 2, 236, 237, 7, 64, 2, 2, 237, 238, 3, 2, 2, 2, 238, 239, 8, 26, 6, 2, 239, 54, 3, 2, 2, 2, 240, 241, 11, 2, 2, 2, 241, 242, 3, 2, 2, 2, 242, 243, 8, 27, 4, 2, 243, 56, 3, 2, 2, 2, 21, 2, 3, 4, 67, 87, 100, 117, 128, 132, 136, 139, 141, 173, 197, 205, 209, 215, 230, 233, 7, 8, 2, 2, 7, 3, 2, 5, 2, 2, 7, 4, 2, 6, 2, 2]
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.java b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.java
index f128ff91c..ba1612875 100755
--- a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.java
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.java
@@ -1,4 +1,4 @@
-// Generated from XMLLexer.g4 by ANTLR 4.9.3
+// Generated from D:/Projects/AndroidStudioProjects/AndroidIDE/lexers/src/main/java/com/itsaky/androidide/lexers/xml\XMLLexer.g4 by ANTLR 4.9.2
 package com.itsaky.androidide.lexers.xml;
 import org.antlr.v4.runtime.Lexer;
 import org.antlr.v4.runtime.CharStream;
@@ -11,15 +11,15 @@ import org.antlr.v4.runtime.misc.*;
 
 @SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
 public class XMLLexer extends Lexer {
-	static { RuntimeMetaData.checkVersion("4.9.3", RuntimeMetaData.VERSION); }
+	static { RuntimeMetaData.checkVersion("4.9.2", RuntimeMetaData.VERSION); }
 
 	protected static final DFA[] _decisionToDFA;
 	protected static final PredictionContextCache _sharedContextCache =
 		new PredictionContextCache();
 	public static final int
-		COMMENT=1, CDATA=2, DTD=3, EntityRef=4, CharRef=5, SEA_WS=6, OPEN=7, OPEN_SLASH=8, 
-		XMLDeclOpen=9, TEXT=10, CLOSE=11, SPECIAL_CLOSE=12, SLASH_CLOSE=13, SLASH=14, 
-		EQUALS=15, STRING=16, Name=17, S=18, PI=19;
+		COLON=1, COMMENT=2, CDATA=3, DTD=4, EntityRef=5, CharRef=6, SEA_WS=7, 
+		OPEN=8, OPEN_SLASH=9, XMLDeclOpen=10, TEXT=11, CLOSE=12, SPECIAL_CLOSE=13, 
+		SLASH_CLOSE=14, SLASH=15, EQUALS=16, STRING=17, Name=18, S=19, PI=20;
 	public static final int
 		INSIDE=1, PROC_INSTR=2;
 	public static String[] channelNames = {
@@ -32,26 +32,26 @@ public class XMLLexer extends Lexer {
 
 	private static String[] makeRuleNames() {
 		return new String[] {
-			"COMMENT", "CDATA", "DTD", "EntityRef", "CharRef", "SEA_WS", "OPEN", 
-			"OPEN_SLASH", "XMLDeclOpen", "SPECIAL_OPEN", "TEXT", "CLOSE", "SPECIAL_CLOSE", 
-			"SLASH_CLOSE", "SLASH", "EQUALS", "STRING", "Name", "S", "HEXDIGIT", 
-			"DIGIT", "NameChar", "NameStartChar", "PI", "IGNORE"
+			"COLON", "COMMENT", "CDATA", "DTD", "EntityRef", "CharRef", "SEA_WS", 
+			"OPEN", "OPEN_SLASH", "XMLDeclOpen", "SPECIAL_OPEN", "TEXT", "CLOSE", 
+			"SPECIAL_CLOSE", "SLASH_CLOSE", "SLASH", "EQUALS", "STRING", "Name", 
+			"S", "HEXDIGIT", "DIGIT", "NameChar", "NameStartChar", "PI", "IGNORE"
 		};
 	}
 	public static final String[] ruleNames = makeRuleNames();
 
 	private static String[] makeLiteralNames() {
 		return new String[] {
-			null, null, null, null, null, null, null, "'<'", "'</'", null, null, 
-			"'>'", null, "'/>'", "'/'", "'='"
+			null, "':'", null, null, null, null, null, null, "'<'", "'</'", null, 
+			null, "'>'", null, "'/>'", "'/'", "'='"
 		};
 	}
 	private static final String[] _LITERAL_NAMES = makeLiteralNames();
 	private static String[] makeSymbolicNames() {
 		return new String[] {
-			null, "COMMENT", "CDATA", "DTD", "EntityRef", "CharRef", "SEA_WS", "OPEN", 
-			"OPEN_SLASH", "XMLDeclOpen", "TEXT", "CLOSE", "SPECIAL_CLOSE", "SLASH_CLOSE", 
-			"SLASH", "EQUALS", "STRING", "Name", "S", "PI"
+			null, "COLON", "COMMENT", "CDATA", "DTD", "EntityRef", "CharRef", "SEA_WS", 
+			"OPEN", "OPEN_SLASH", "XMLDeclOpen", "TEXT", "CLOSE", "SPECIAL_CLOSE", 
+			"SLASH_CLOSE", "SLASH", "EQUALS", "STRING", "Name", "S", "PI"
 		};
 	}
 	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
@@ -113,85 +113,86 @@ public class XMLLexer extends Lexer {
 	public ATN getATN() { return _ATN; }
 
 	public static final String _serializedATN =
-		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\2\25\u00f0\b\1\b\1"+
+		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\2\26\u00f4\b\1\b\1"+
 		"\b\1\4\2\t\2\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4"+
 		"\n\t\n\4\13\t\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t"+
 		"\21\4\22\t\22\4\23\t\23\4\24\t\24\4\25\t\25\4\26\t\26\4\27\t\27\4\30\t"+
-		"\30\4\31\t\31\4\32\t\32\3\2\3\2\3\2\3\2\3\2\3\2\7\2>\n\2\f\2\16\2A\13"+
-		"\2\3\2\3\2\3\2\3\2\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7\3R\n"+
-		"\3\f\3\16\3U\13\3\3\3\3\3\3\3\3\3\3\4\3\4\3\4\3\4\7\4_\n\4\f\4\16\4b\13"+
-		"\4\3\4\3\4\3\4\3\4\3\5\3\5\3\5\3\5\3\6\3\6\3\6\3\6\6\6p\n\6\r\6\16\6q"+
-		"\3\6\3\6\3\6\3\6\3\6\3\6\3\6\6\6{\n\6\r\6\16\6|\3\6\3\6\5\6\u0081\n\6"+
-		"\3\7\3\7\5\7\u0085\n\7\3\7\6\7\u0088\n\7\r\7\16\7\u0089\3\b\3\b\3\b\3"+
-		"\b\3\t\3\t\3\t\3\t\3\t\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\13\3"+
-		"\13\3\13\3\13\3\13\3\13\3\13\3\13\3\f\6\f\u00a8\n\f\r\f\16\f\u00a9\3\r"+
-		"\3\r\3\r\3\r\3\16\3\16\3\16\3\16\3\16\3\17\3\17\3\17\3\17\3\17\3\20\3"+
-		"\20\3\21\3\21\3\22\3\22\7\22\u00c0\n\22\f\22\16\22\u00c3\13\22\3\22\3"+
-		"\22\3\22\7\22\u00c8\n\22\f\22\16\22\u00cb\13\22\3\22\5\22\u00ce\n\22\3"+
-		"\23\3\23\7\23\u00d2\n\23\f\23\16\23\u00d5\13\23\3\24\3\24\3\24\3\24\3"+
-		"\25\3\25\3\26\3\26\3\27\3\27\3\27\3\27\5\27\u00e3\n\27\3\30\5\30\u00e6"+
-		"\n\30\3\31\3\31\3\31\3\31\3\31\3\32\3\32\3\32\3\32\5?S`\2\33\5\3\7\4\t"+
-		"\5\13\6\r\7\17\b\21\t\23\n\25\13\27\2\31\f\33\r\35\16\37\17!\20#\21%\22"+
-		"\'\23)\24+\2-\2/\2\61\2\63\25\65\2\5\2\3\4\f\4\2\13\13\"\"\4\2((>>\4\2"+
-		"$$>>\4\2))>>\5\2\13\f\17\17\"\"\5\2\62;CHch\3\2\62;\4\2/\60aa\5\2\u00b9"+
-		"\u00b9\u0302\u0371\u2041\u2042\n\2<<C\\c|\u2072\u2191\u2c02\u2ff1\u3003"+
-		"\ud801\uf902\ufdd1\ufdf2\uffff\2\u00fa\2\5\3\2\2\2\2\7\3\2\2\2\2\t\3\2"+
-		"\2\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2\2\2\2\21\3\2\2\2\2\23\3\2\2\2\2"+
-		"\25\3\2\2\2\2\27\3\2\2\2\2\31\3\2\2\2\3\33\3\2\2\2\3\35\3\2\2\2\3\37\3"+
-		"\2\2\2\3!\3\2\2\2\3#\3\2\2\2\3%\3\2\2\2\3\'\3\2\2\2\3)\3\2\2\2\4\63\3"+
-		"\2\2\2\4\65\3\2\2\2\5\67\3\2\2\2\7F\3\2\2\2\tZ\3\2\2\2\13g\3\2\2\2\r\u0080"+
-		"\3\2\2\2\17\u0087\3\2\2\2\21\u008b\3\2\2\2\23\u008f\3\2\2\2\25\u0094\3"+
-		"\2\2\2\27\u009e\3\2\2\2\31\u00a7\3\2\2\2\33\u00ab\3\2\2\2\35\u00af\3\2"+
-		"\2\2\37\u00b4\3\2\2\2!\u00b9\3\2\2\2#\u00bb\3\2\2\2%\u00cd\3\2\2\2\'\u00cf"+
-		"\3\2\2\2)\u00d6\3\2\2\2+\u00da\3\2\2\2-\u00dc\3\2\2\2/\u00e2\3\2\2\2\61"+
-		"\u00e5\3\2\2\2\63\u00e7\3\2\2\2\65\u00ec\3\2\2\2\678\7>\2\289\7#\2\29"+
-		":\7/\2\2:;\7/\2\2;?\3\2\2\2<>\13\2\2\2=<\3\2\2\2>A\3\2\2\2?@\3\2\2\2?"+
-		"=\3\2\2\2@B\3\2\2\2A?\3\2\2\2BC\7/\2\2CD\7/\2\2DE\7@\2\2E\6\3\2\2\2FG"+
-		"\7>\2\2GH\7#\2\2HI\7]\2\2IJ\7E\2\2JK\7F\2\2KL\7C\2\2LM\7V\2\2MN\7C\2\2"+
-		"NO\7]\2\2OS\3\2\2\2PR\13\2\2\2QP\3\2\2\2RU\3\2\2\2ST\3\2\2\2SQ\3\2\2\2"+
-		"TV\3\2\2\2US\3\2\2\2VW\7_\2\2WX\7_\2\2XY\7@\2\2Y\b\3\2\2\2Z[\7>\2\2[\\"+
-		"\7#\2\2\\`\3\2\2\2]_\13\2\2\2^]\3\2\2\2_b\3\2\2\2`a\3\2\2\2`^\3\2\2\2"+
-		"ac\3\2\2\2b`\3\2\2\2cd\7@\2\2de\3\2\2\2ef\b\4\2\2f\n\3\2\2\2gh\7(\2\2"+
-		"hi\5\'\23\2ij\7=\2\2j\f\3\2\2\2kl\7(\2\2lm\7%\2\2mo\3\2\2\2np\5-\26\2"+
-		"on\3\2\2\2pq\3\2\2\2qo\3\2\2\2qr\3\2\2\2rs\3\2\2\2st\7=\2\2t\u0081\3\2"+
-		"\2\2uv\7(\2\2vw\7%\2\2wx\7z\2\2xz\3\2\2\2y{\5+\25\2zy\3\2\2\2{|\3\2\2"+
-		"\2|z\3\2\2\2|}\3\2\2\2}~\3\2\2\2~\177\7=\2\2\177\u0081\3\2\2\2\u0080k"+
-		"\3\2\2\2\u0080u\3\2\2\2\u0081\16\3\2\2\2\u0082\u0088\t\2\2\2\u0083\u0085"+
-		"\7\17\2\2\u0084\u0083\3\2\2\2\u0084\u0085\3\2\2\2\u0085\u0086\3\2\2\2"+
-		"\u0086\u0088\7\f\2\2\u0087\u0082\3\2\2\2\u0087\u0084\3\2\2\2\u0088\u0089"+
-		"\3\2\2\2\u0089\u0087\3\2\2\2\u0089\u008a\3\2\2\2\u008a\20\3\2\2\2\u008b"+
-		"\u008c\7>\2\2\u008c\u008d\3\2\2\2\u008d\u008e\b\b\3\2\u008e\22\3\2\2\2"+
-		"\u008f\u0090\7>\2\2\u0090\u0091\7\61\2\2\u0091\u0092\3\2\2\2\u0092\u0093"+
-		"\b\t\3\2\u0093\24\3\2\2\2\u0094\u0095\7>\2\2\u0095\u0096\7A\2\2\u0096"+
-		"\u0097\7z\2\2\u0097\u0098\7o\2\2\u0098\u0099\7n\2\2\u0099\u009a\3\2\2"+
-		"\2\u009a\u009b\5)\24\2\u009b\u009c\3\2\2\2\u009c\u009d\b\n\3\2\u009d\26"+
-		"\3\2\2\2\u009e\u009f\7>\2\2\u009f\u00a0\7A\2\2\u00a0\u00a1\3\2\2\2\u00a1"+
-		"\u00a2\5\'\23\2\u00a2\u00a3\3\2\2\2\u00a3\u00a4\b\13\4\2\u00a4\u00a5\b"+
-		"\13\5\2\u00a5\30\3\2\2\2\u00a6\u00a8\n\3\2\2\u00a7\u00a6\3\2\2\2\u00a8"+
-		"\u00a9\3\2\2\2\u00a9\u00a7\3\2\2\2\u00a9\u00aa\3\2\2\2\u00aa\32\3\2\2"+
-		"\2\u00ab\u00ac\7@\2\2\u00ac\u00ad\3\2\2\2\u00ad\u00ae\b\r\6\2\u00ae\34"+
-		"\3\2\2\2\u00af\u00b0\7A\2\2\u00b0\u00b1\7@\2\2\u00b1\u00b2\3\2\2\2\u00b2"+
-		"\u00b3\b\16\6\2\u00b3\36\3\2\2\2\u00b4\u00b5\7\61\2\2\u00b5\u00b6\7@\2"+
-		"\2\u00b6\u00b7\3\2\2\2\u00b7\u00b8\b\17\6\2\u00b8 \3\2\2\2\u00b9\u00ba"+
-		"\7\61\2\2\u00ba\"\3\2\2\2\u00bb\u00bc\7?\2\2\u00bc$\3\2\2\2\u00bd\u00c1"+
-		"\7$\2\2\u00be\u00c0\n\4\2\2\u00bf\u00be\3\2\2\2\u00c0\u00c3\3\2\2\2\u00c1"+
-		"\u00bf\3\2\2\2\u00c1\u00c2\3\2\2\2\u00c2\u00c4\3\2\2\2\u00c3\u00c1\3\2"+
-		"\2\2\u00c4\u00ce\7$\2\2\u00c5\u00c9\7)\2\2\u00c6\u00c8\n\5\2\2\u00c7\u00c6"+
-		"\3\2\2\2\u00c8\u00cb\3\2\2\2\u00c9\u00c7\3\2\2\2\u00c9\u00ca\3\2\2\2\u00ca"+
-		"\u00cc\3\2\2\2\u00cb\u00c9\3\2\2\2\u00cc\u00ce\7)\2\2\u00cd\u00bd\3\2"+
-		"\2\2\u00cd\u00c5\3\2\2\2\u00ce&\3\2\2\2\u00cf\u00d3\5\61\30\2\u00d0\u00d2"+
-		"\5/\27\2\u00d1\u00d0\3\2\2\2\u00d2\u00d5\3\2\2\2\u00d3\u00d1\3\2\2\2\u00d3"+
-		"\u00d4\3\2\2\2\u00d4(\3\2\2\2\u00d5\u00d3\3\2\2\2\u00d6\u00d7\t\6\2\2"+
-		"\u00d7\u00d8\3\2\2\2\u00d8\u00d9\b\24\2\2\u00d9*\3\2\2\2\u00da\u00db\t"+
-		"\7\2\2\u00db,\3\2\2\2\u00dc\u00dd\t\b\2\2\u00dd.\3\2\2\2\u00de\u00e3\5"+
-		"\61\30\2\u00df\u00e3\t\t\2\2\u00e0\u00e3\5-\26\2\u00e1\u00e3\t\n\2\2\u00e2"+
-		"\u00de\3\2\2\2\u00e2\u00df\3\2\2\2\u00e2\u00e0\3\2\2\2\u00e2\u00e1\3\2"+
-		"\2\2\u00e3\60\3\2\2\2\u00e4\u00e6\t\13\2\2\u00e5\u00e4\3\2\2\2\u00e6\62"+
-		"\3\2\2\2\u00e7\u00e8\7A\2\2\u00e8\u00e9\7@\2\2\u00e9\u00ea\3\2\2\2\u00ea"+
-		"\u00eb\b\31\6\2\u00eb\64\3\2\2\2\u00ec\u00ed\13\2\2\2\u00ed\u00ee\3\2"+
-		"\2\2\u00ee\u00ef\b\32\4\2\u00ef\66\3\2\2\2\25\2\3\4?S`q|\u0080\u0084\u0087"+
-		"\u0089\u00a9\u00c1\u00c9\u00cd\u00d3\u00e2\u00e5\7\b\2\2\7\3\2\5\2\2\7"+
-		"\4\2\6\2\2";
+		"\30\4\31\t\31\4\32\t\32\4\33\t\33\3\2\3\2\3\3\3\3\3\3\3\3\3\3\3\3\7\3"+
+		"B\n\3\f\3\16\3E\13\3\3\3\3\3\3\3\3\3\3\4\3\4\3\4\3\4\3\4\3\4\3\4\3\4\3"+
+		"\4\3\4\3\4\7\4V\n\4\f\4\16\4Y\13\4\3\4\3\4\3\4\3\4\3\5\3\5\3\5\3\5\7\5"+
+		"c\n\5\f\5\16\5f\13\5\3\5\3\5\3\5\3\5\3\6\3\6\3\6\3\6\3\7\3\7\3\7\3\7\6"+
+		"\7t\n\7\r\7\16\7u\3\7\3\7\3\7\3\7\3\7\3\7\3\7\6\7\177\n\7\r\7\16\7\u0080"+
+		"\3\7\3\7\5\7\u0085\n\7\3\b\3\b\5\b\u0089\n\b\3\b\6\b\u008c\n\b\r\b\16"+
+		"\b\u008d\3\t\3\t\3\t\3\t\3\n\3\n\3\n\3\n\3\n\3\13\3\13\3\13\3\13\3\13"+
+		"\3\13\3\13\3\13\3\13\3\13\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\r\6\r\u00ac"+
+		"\n\r\r\r\16\r\u00ad\3\16\3\16\3\16\3\16\3\17\3\17\3\17\3\17\3\17\3\20"+
+		"\3\20\3\20\3\20\3\20\3\21\3\21\3\22\3\22\3\23\3\23\7\23\u00c4\n\23\f\23"+
+		"\16\23\u00c7\13\23\3\23\3\23\3\23\7\23\u00cc\n\23\f\23\16\23\u00cf\13"+
+		"\23\3\23\5\23\u00d2\n\23\3\24\3\24\7\24\u00d6\n\24\f\24\16\24\u00d9\13"+
+		"\24\3\25\3\25\3\25\3\25\3\26\3\26\3\27\3\27\3\30\3\30\3\30\3\30\5\30\u00e7"+
+		"\n\30\3\31\5\31\u00ea\n\31\3\32\3\32\3\32\3\32\3\32\3\33\3\33\3\33\3\33"+
+		"\5CWd\2\34\5\3\7\4\t\5\13\6\r\7\17\b\21\t\23\n\25\13\27\f\31\2\33\r\35"+
+		"\16\37\17!\20#\21%\22\'\23)\24+\25-\2/\2\61\2\63\2\65\26\67\2\5\2\3\4"+
+		"\f\4\2\13\13\"\"\4\2((>>\4\2$$>>\4\2))>>\5\2\13\f\17\17\"\"\5\2\62;CH"+
+		"ch\3\2\62;\4\2/\60aa\5\2\u00b9\u00b9\u0302\u0371\u2041\u2042\n\2<<C\\"+
+		"c|\u2072\u2191\u2c02\u2ff1\u3003\ud801\uf902\ufdd1\ufdf2\uffff\2\u00fe"+
+		"\2\5\3\2\2\2\2\7\3\2\2\2\2\t\3\2\2\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2"+
+		"\2\2\2\21\3\2\2\2\2\23\3\2\2\2\2\25\3\2\2\2\2\27\3\2\2\2\2\31\3\2\2\2"+
+		"\2\33\3\2\2\2\3\35\3\2\2\2\3\37\3\2\2\2\3!\3\2\2\2\3#\3\2\2\2\3%\3\2\2"+
+		"\2\3\'\3\2\2\2\3)\3\2\2\2\3+\3\2\2\2\4\65\3\2\2\2\4\67\3\2\2\2\59\3\2"+
+		"\2\2\7;\3\2\2\2\tJ\3\2\2\2\13^\3\2\2\2\rk\3\2\2\2\17\u0084\3\2\2\2\21"+
+		"\u008b\3\2\2\2\23\u008f\3\2\2\2\25\u0093\3\2\2\2\27\u0098\3\2\2\2\31\u00a2"+
+		"\3\2\2\2\33\u00ab\3\2\2\2\35\u00af\3\2\2\2\37\u00b3\3\2\2\2!\u00b8\3\2"+
+		"\2\2#\u00bd\3\2\2\2%\u00bf\3\2\2\2\'\u00d1\3\2\2\2)\u00d3\3\2\2\2+\u00da"+
+		"\3\2\2\2-\u00de\3\2\2\2/\u00e0\3\2\2\2\61\u00e6\3\2\2\2\63\u00e9\3\2\2"+
+		"\2\65\u00eb\3\2\2\2\67\u00f0\3\2\2\29:\7<\2\2:\6\3\2\2\2;<\7>\2\2<=\7"+
+		"#\2\2=>\7/\2\2>?\7/\2\2?C\3\2\2\2@B\13\2\2\2A@\3\2\2\2BE\3\2\2\2CD\3\2"+
+		"\2\2CA\3\2\2\2DF\3\2\2\2EC\3\2\2\2FG\7/\2\2GH\7/\2\2HI\7@\2\2I\b\3\2\2"+
+		"\2JK\7>\2\2KL\7#\2\2LM\7]\2\2MN\7E\2\2NO\7F\2\2OP\7C\2\2PQ\7V\2\2QR\7"+
+		"C\2\2RS\7]\2\2SW\3\2\2\2TV\13\2\2\2UT\3\2\2\2VY\3\2\2\2WX\3\2\2\2WU\3"+
+		"\2\2\2XZ\3\2\2\2YW\3\2\2\2Z[\7_\2\2[\\\7_\2\2\\]\7@\2\2]\n\3\2\2\2^_\7"+
+		">\2\2_`\7#\2\2`d\3\2\2\2ac\13\2\2\2ba\3\2\2\2cf\3\2\2\2de\3\2\2\2db\3"+
+		"\2\2\2eg\3\2\2\2fd\3\2\2\2gh\7@\2\2hi\3\2\2\2ij\b\5\2\2j\f\3\2\2\2kl\7"+
+		"(\2\2lm\5)\24\2mn\7=\2\2n\16\3\2\2\2op\7(\2\2pq\7%\2\2qs\3\2\2\2rt\5/"+
+		"\27\2sr\3\2\2\2tu\3\2\2\2us\3\2\2\2uv\3\2\2\2vw\3\2\2\2wx\7=\2\2x\u0085"+
+		"\3\2\2\2yz\7(\2\2z{\7%\2\2{|\7z\2\2|~\3\2\2\2}\177\5-\26\2~}\3\2\2\2\177"+
+		"\u0080\3\2\2\2\u0080~\3\2\2\2\u0080\u0081\3\2\2\2\u0081\u0082\3\2\2\2"+
+		"\u0082\u0083\7=\2\2\u0083\u0085\3\2\2\2\u0084o\3\2\2\2\u0084y\3\2\2\2"+
+		"\u0085\20\3\2\2\2\u0086\u008c\t\2\2\2\u0087\u0089\7\17\2\2\u0088\u0087"+
+		"\3\2\2\2\u0088\u0089\3\2\2\2\u0089\u008a\3\2\2\2\u008a\u008c\7\f\2\2\u008b"+
+		"\u0086\3\2\2\2\u008b\u0088\3\2\2\2\u008c\u008d\3\2\2\2\u008d\u008b\3\2"+
+		"\2\2\u008d\u008e\3\2\2\2\u008e\22\3\2\2\2\u008f\u0090\7>\2\2\u0090\u0091"+
+		"\3\2\2\2\u0091\u0092\b\t\3\2\u0092\24\3\2\2\2\u0093\u0094\7>\2\2\u0094"+
+		"\u0095\7\61\2\2\u0095\u0096\3\2\2\2\u0096\u0097\b\n\3\2\u0097\26\3\2\2"+
+		"\2\u0098\u0099\7>\2\2\u0099\u009a\7A\2\2\u009a\u009b\7z\2\2\u009b\u009c"+
+		"\7o\2\2\u009c\u009d\7n\2\2\u009d\u009e\3\2\2\2\u009e\u009f\5+\25\2\u009f"+
+		"\u00a0\3\2\2\2\u00a0\u00a1\b\13\3\2\u00a1\30\3\2\2\2\u00a2\u00a3\7>\2"+
+		"\2\u00a3\u00a4\7A\2\2\u00a4\u00a5\3\2\2\2\u00a5\u00a6\5)\24\2\u00a6\u00a7"+
+		"\3\2\2\2\u00a7\u00a8\b\f\4\2\u00a8\u00a9\b\f\5\2\u00a9\32\3\2\2\2\u00aa"+
+		"\u00ac\n\3\2\2\u00ab\u00aa\3\2\2\2\u00ac\u00ad\3\2\2\2\u00ad\u00ab\3\2"+
+		"\2\2\u00ad\u00ae\3\2\2\2\u00ae\34\3\2\2\2\u00af\u00b0\7@\2\2\u00b0\u00b1"+
+		"\3\2\2\2\u00b1\u00b2\b\16\6\2\u00b2\36\3\2\2\2\u00b3\u00b4\7A\2\2\u00b4"+
+		"\u00b5\7@\2\2\u00b5\u00b6\3\2\2\2\u00b6\u00b7\b\17\6\2\u00b7 \3\2\2\2"+
+		"\u00b8\u00b9\7\61\2\2\u00b9\u00ba\7@\2\2\u00ba\u00bb\3\2\2\2\u00bb\u00bc"+
+		"\b\20\6\2\u00bc\"\3\2\2\2\u00bd\u00be\7\61\2\2\u00be$\3\2\2\2\u00bf\u00c0"+
+		"\7?\2\2\u00c0&\3\2\2\2\u00c1\u00c5\7$\2\2\u00c2\u00c4\n\4\2\2\u00c3\u00c2"+
+		"\3\2\2\2\u00c4\u00c7\3\2\2\2\u00c5\u00c3\3\2\2\2\u00c5\u00c6\3\2\2\2\u00c6"+
+		"\u00c8\3\2\2\2\u00c7\u00c5\3\2\2\2\u00c8\u00d2\7$\2\2\u00c9\u00cd\7)\2"+
+		"\2\u00ca\u00cc\n\5\2\2\u00cb\u00ca\3\2\2\2\u00cc\u00cf\3\2\2\2\u00cd\u00cb"+
+		"\3\2\2\2\u00cd\u00ce\3\2\2\2\u00ce\u00d0\3\2\2\2\u00cf\u00cd\3\2\2\2\u00d0"+
+		"\u00d2\7)\2\2\u00d1\u00c1\3\2\2\2\u00d1\u00c9\3\2\2\2\u00d2(\3\2\2\2\u00d3"+
+		"\u00d7\5\63\31\2\u00d4\u00d6\5\61\30\2\u00d5\u00d4\3\2\2\2\u00d6\u00d9"+
+		"\3\2\2\2\u00d7\u00d5\3\2\2\2\u00d7\u00d8\3\2\2\2\u00d8*\3\2\2\2\u00d9"+
+		"\u00d7\3\2\2\2\u00da\u00db\t\6\2\2\u00db\u00dc\3\2\2\2\u00dc\u00dd\b\25"+
+		"\2\2\u00dd,\3\2\2\2\u00de\u00df\t\7\2\2\u00df.\3\2\2\2\u00e0\u00e1\t\b"+
+		"\2\2\u00e1\60\3\2\2\2\u00e2\u00e7\5\63\31\2\u00e3\u00e7\t\t\2\2\u00e4"+
+		"\u00e7\5/\27\2\u00e5\u00e7\t\n\2\2\u00e6\u00e2\3\2\2\2\u00e6\u00e3\3\2"+
+		"\2\2\u00e6\u00e4\3\2\2\2\u00e6\u00e5\3\2\2\2\u00e7\62\3\2\2\2\u00e8\u00ea"+
+		"\t\13\2\2\u00e9\u00e8\3\2\2\2\u00ea\64\3\2\2\2\u00eb\u00ec\7A\2\2\u00ec"+
+		"\u00ed\7@\2\2\u00ed\u00ee\3\2\2\2\u00ee\u00ef\b\32\6\2\u00ef\66\3\2\2"+
+		"\2\u00f0\u00f1\13\2\2\2\u00f1\u00f2\3\2\2\2\u00f2\u00f3\b\33\4\2\u00f3"+
+		"8\3\2\2\2\25\2\3\4CWdu\u0080\u0084\u0088\u008b\u008d\u00ad\u00c5\u00cd"+
+		"\u00d1\u00d7\u00e6\u00e9\7\b\2\2\7\3\2\5\2\2\7\4\2\6\2\2";
 	public static final ATN _ATN =
 		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
 	static {
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.tokens b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.tokens
index 42c822882..393ca1ed1 100644
--- a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.tokens
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLLexer.tokens
@@ -1,25 +1,27 @@
-COMMENT=1
-CDATA=2
-DTD=3
-EntityRef=4
-CharRef=5
-SEA_WS=6
-OPEN=7
-OPEN_SLASH=8
-XMLDeclOpen=9
-TEXT=10
-CLOSE=11
-SPECIAL_CLOSE=12
-SLASH_CLOSE=13
-SLASH=14
-EQUALS=15
-STRING=16
-Name=17
-S=18
-PI=19
-'<'=7
-'</'=8
-'>'=11
-'/>'=13
-'/'=14
-'='=15
+COLON=1
+COMMENT=2
+CDATA=3
+DTD=4
+EntityRef=5
+CharRef=6
+SEA_WS=7
+OPEN=8
+OPEN_SLASH=9
+XMLDeclOpen=10
+TEXT=11
+CLOSE=12
+SPECIAL_CLOSE=13
+SLASH_CLOSE=14
+SLASH=15
+EQUALS=16
+STRING=17
+Name=18
+S=19
+PI=20
+':'=1
+'<'=8
+'</'=9
+'>'=12
+'/>'=14
+'/'=15
+'='=16
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.g4 b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.g4
new file mode 100644
index 000000000..643bc1eb6
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.g4
@@ -0,0 +1,51 @@
+/*
+ [The "BSD licence"]
+ Copyright (c) 2013 Terence Parr
+ All rights reserved.
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. The name of the author may not be used to endorse or promote products
+    derived from this software without specific prior written permission.
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/** XML parser derived from ANTLR v4 ref guide book example */
+parser grammar XMLParser;
+
+options { tokenVocab=XMLLexer; }
+
+document                :   prolog? misc* element misc*;
+
+prolog                  :   XMLDeclOpen attribute* SPECIAL_CLOSE ;
+
+content                 :   chardata?
+                            ((element | reference | CDATA | PI | COMMENT) chardata?)* ;
+
+element                 :   nonEmptyClosingElement | emptyClosingElement;
+nonEmptyClosingElement  :   OPEN Name attribute* CLOSE content OPEN_SLASH Name CLOSE;
+emptyClosingElement     :   OPEN Name attribute* SLASH_CLOSE;
+
+reference               :   EntityRef | CharRef ;
+
+attribute               :   (prefix)? Name EQUALS STRING ;
+
+prefix                  :   Name COLON ;
+
+chardata                :   TEXT | SEA_WS ;
+
+misc                    :   COMMENT | PI | SEA_WS ;
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.interp b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.interp
new file mode 100644
index 000000000..977eb033e
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.interp
@@ -0,0 +1,62 @@
+token literal names:
+null
+':'
+null
+null
+null
+null
+null
+null
+'<'
+'</'
+null
+null
+'>'
+null
+'/>'
+'/'
+'='
+null
+null
+null
+null
+
+token symbolic names:
+null
+COLON
+COMMENT
+CDATA
+DTD
+EntityRef
+CharRef
+SEA_WS
+OPEN
+OPEN_SLASH
+XMLDeclOpen
+TEXT
+CLOSE
+SPECIAL_CLOSE
+SLASH_CLOSE
+SLASH
+EQUALS
+STRING
+Name
+S
+PI
+
+rule names:
+document
+prolog
+content
+element
+nonEmptyClosingElement
+emptyClosingElement
+reference
+attribute
+prefix
+chardata
+misc
+
+
+atn:
+[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 22, 112, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 3, 2, 5, 2, 26, 10, 2, 3, 2, 7, 2, 29, 10, 2, 12, 2, 14, 2, 32, 11, 2, 3, 2, 3, 2, 7, 2, 36, 10, 2, 12, 2, 14, 2, 39, 11, 2, 3, 3, 3, 3, 7, 3, 43, 10, 3, 12, 3, 14, 3, 46, 11, 3, 3, 3, 3, 3, 3, 4, 5, 4, 51, 10, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 5, 4, 58, 10, 4, 3, 4, 5, 4, 61, 10, 4, 7, 4, 63, 10, 4, 12, 4, 14, 4, 66, 11, 4, 3, 5, 3, 5, 5, 5, 70, 10, 5, 3, 6, 3, 6, 3, 6, 7, 6, 75, 10, 6, 12, 6, 14, 6, 78, 11, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 7, 3, 7, 3, 7, 7, 7, 89, 10, 7, 12, 7, 14, 7, 92, 11, 7, 3, 7, 3, 7, 3, 8, 3, 8, 3, 9, 5, 9, 99, 10, 9, 3, 9, 3, 9, 3, 9, 3, 9, 3, 10, 3, 10, 3, 10, 3, 11, 3, 11, 3, 12, 3, 12, 3, 12, 2, 2, 13, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 2, 5, 3, 2, 7, 8, 4, 2, 9, 9, 13, 13, 5, 2, 4, 4, 9, 9, 22, 22, 2, 115, 2, 25, 3, 2, 2, 2, 4, 40, 3, 2, 2, 2, 6, 50, 3, 2, 2, 2, 8, 69, 3, 2, 2, 2, 10, 71, 3, 2, 2, 2, 12, 85, 3, 2, 2, 2, 14, 95, 3, 2, 2, 2, 16, 98, 3, 2, 2, 2, 18, 104, 3, 2, 2, 2, 20, 107, 3, 2, 2, 2, 22, 109, 3, 2, 2, 2, 24, 26, 5, 4, 3, 2, 25, 24, 3, 2, 2, 2, 25, 26, 3, 2, 2, 2, 26, 30, 3, 2, 2, 2, 27, 29, 5, 22, 12, 2, 28, 27, 3, 2, 2, 2, 29, 32, 3, 2, 2, 2, 30, 28, 3, 2, 2, 2, 30, 31, 3, 2, 2, 2, 31, 33, 3, 2, 2, 2, 32, 30, 3, 2, 2, 2, 33, 37, 5, 8, 5, 2, 34, 36, 5, 22, 12, 2, 35, 34, 3, 2, 2, 2, 36, 39, 3, 2, 2, 2, 37, 35, 3, 2, 2, 2, 37, 38, 3, 2, 2, 2, 38, 3, 3, 2, 2, 2, 39, 37, 3, 2, 2, 2, 40, 44, 7, 12, 2, 2, 41, 43, 5, 16, 9, 2, 42, 41, 3, 2, 2, 2, 43, 46, 3, 2, 2, 2, 44, 42, 3, 2, 2, 2, 44, 45, 3, 2, 2, 2, 45, 47, 3, 2, 2, 2, 46, 44, 3, 2, 2, 2, 47, 48, 7, 15, 2, 2, 48, 5, 3, 2, 2, 2, 49, 51, 5, 20, 11, 2, 50, 49, 3, 2, 2, 2, 50, 51, 3, 2, 2, 2, 51, 64, 3, 2, 2, 2, 52, 58, 5, 8, 5, 2, 53, 58, 5, 14, 8, 2, 54, 58, 7, 5, 2, 2, 55, 58, 7, 22, 2, 2, 56, 58, 7, 4, 2, 2, 57, 52, 3, 2, 2, 2, 57, 53, 3, 2, 2, 2, 57, 54, 3, 2, 2, 2, 57, 55, 3, 2, 2, 2, 57, 56, 3, 2, 2, 2, 58, 60, 3, 2, 2, 2, 59, 61, 5, 20, 11, 2, 60, 59, 3, 2, 2, 2, 60, 61, 3, 2, 2, 2, 61, 63, 3, 2, 2, 2, 62, 57, 3, 2, 2, 2, 63, 66, 3, 2, 2, 2, 64, 62, 3, 2, 2, 2, 64, 65, 3, 2, 2, 2, 65, 7, 3, 2, 2, 2, 66, 64, 3, 2, 2, 2, 67, 70, 5, 10, 6, 2, 68, 70, 5, 12, 7, 2, 69, 67, 3, 2, 2, 2, 69, 68, 3, 2, 2, 2, 70, 9, 3, 2, 2, 2, 71, 72, 7, 10, 2, 2, 72, 76, 7, 20, 2, 2, 73, 75, 5, 16, 9, 2, 74, 73, 3, 2, 2, 2, 75, 78, 3, 2, 2, 2, 76, 74, 3, 2, 2, 2, 76, 77, 3, 2, 2, 2, 77, 79, 3, 2, 2, 2, 78, 76, 3, 2, 2, 2, 79, 80, 7, 14, 2, 2, 80, 81, 5, 6, 4, 2, 81, 82, 7, 11, 2, 2, 82, 83, 7, 20, 2, 2, 83, 84, 7, 14, 2, 2, 84, 11, 3, 2, 2, 2, 85, 86, 7, 10, 2, 2, 86, 90, 7, 20, 2, 2, 87, 89, 5, 16, 9, 2, 88, 87, 3, 2, 2, 2, 89, 92, 3, 2, 2, 2, 90, 88, 3, 2, 2, 2, 90, 91, 3, 2, 2, 2, 91, 93, 3, 2, 2, 2, 92, 90, 3, 2, 2, 2, 93, 94, 7, 16, 2, 2, 94, 13, 3, 2, 2, 2, 95, 96, 9, 2, 2, 2, 96, 15, 3, 2, 2, 2, 97, 99, 5, 18, 10, 2, 98, 97, 3, 2, 2, 2, 98, 99, 3, 2, 2, 2, 99, 100, 3, 2, 2, 2, 100, 101, 7, 20, 2, 2, 101, 102, 7, 18, 2, 2, 102, 103, 7, 19, 2, 2, 103, 17, 3, 2, 2, 2, 104, 105, 7, 20, 2, 2, 105, 106, 7, 3, 2, 2, 106, 19, 3, 2, 2, 2, 107, 108, 9, 3, 2, 2, 108, 21, 3, 2, 2, 2, 109, 110, 9, 4, 2, 2, 110, 23, 3, 2, 2, 2, 14, 25, 30, 37, 44, 50, 57, 60, 64, 69, 76, 90, 98]
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.java b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.java
new file mode 100644
index 000000000..038c86aa2
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.java
@@ -0,0 +1,914 @@
+// Generated from D:/Projects/AndroidStudioProjects/AndroidIDE/lexers/src/main/java/com/itsaky/androidide/lexers/xml\XMLParser.g4 by ANTLR 4.9.2
+package com.itsaky.androidide.lexers.xml;
+import org.antlr.v4.runtime.atn.*;
+import org.antlr.v4.runtime.dfa.DFA;
+import org.antlr.v4.runtime.*;
+import org.antlr.v4.runtime.misc.*;
+import org.antlr.v4.runtime.tree.*;
+import java.util.List;
+import java.util.Iterator;
+import java.util.ArrayList;
+
+@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
+public class XMLParser extends Parser {
+	static { RuntimeMetaData.checkVersion("4.9.2", RuntimeMetaData.VERSION); }
+
+	protected static final DFA[] _decisionToDFA;
+	protected static final PredictionContextCache _sharedContextCache =
+		new PredictionContextCache();
+	public static final int
+		COLON=1, COMMENT=2, CDATA=3, DTD=4, EntityRef=5, CharRef=6, SEA_WS=7, 
+		OPEN=8, OPEN_SLASH=9, XMLDeclOpen=10, TEXT=11, CLOSE=12, SPECIAL_CLOSE=13, 
+		SLASH_CLOSE=14, SLASH=15, EQUALS=16, STRING=17, Name=18, S=19, PI=20;
+	public static final int
+		RULE_document = 0, RULE_prolog = 1, RULE_content = 2, RULE_element = 3, 
+		RULE_nonEmptyClosingElement = 4, RULE_emptyClosingElement = 5, RULE_reference = 6, 
+		RULE_attribute = 7, RULE_prefix = 8, RULE_chardata = 9, RULE_misc = 10;
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"document", "prolog", "content", "element", "nonEmptyClosingElement", 
+			"emptyClosingElement", "reference", "attribute", "prefix", "chardata", 
+			"misc"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "':'", null, null, null, null, null, null, "'<'", "'</'", null, 
+			null, "'>'", null, "'/>'", "'/'", "'='"
+		};
+	}
+	private static final String[] _LITERAL_NAMES = makeLiteralNames();
+	private static String[] makeSymbolicNames() {
+		return new String[] {
+			null, "COLON", "COMMENT", "CDATA", "DTD", "EntityRef", "CharRef", "SEA_WS", 
+			"OPEN", "OPEN_SLASH", "XMLDeclOpen", "TEXT", "CLOSE", "SPECIAL_CLOSE", 
+			"SLASH_CLOSE", "SLASH", "EQUALS", "STRING", "Name", "S", "PI"
+		};
+	}
+	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
+	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
+
+	/**
+	 * @deprecated Use {@link #VOCABULARY} instead.
+	 */
+	@Deprecated
+	public static final String[] tokenNames;
+	static {
+		tokenNames = new String[_SYMBOLIC_NAMES.length];
+		for (int i = 0; i < tokenNames.length; i++) {
+			tokenNames[i] = VOCABULARY.getLiteralName(i);
+			if (tokenNames[i] == null) {
+				tokenNames[i] = VOCABULARY.getSymbolicName(i);
+			}
+
+			if (tokenNames[i] == null) {
+				tokenNames[i] = "<INVALID>";
+			}
+		}
+	}
+
+	@Override
+	@Deprecated
+	public String[] getTokenNames() {
+		return tokenNames;
+	}
+
+	@Override
+
+	public Vocabulary getVocabulary() {
+		return VOCABULARY;
+	}
+
+	@Override
+	public String getGrammarFileName() { return "XMLParser.g4"; }
+
+	@Override
+	public String[] getRuleNames() { return ruleNames; }
+
+	@Override
+	public String getSerializedATN() { return _serializedATN; }
+
+	@Override
+	public ATN getATN() { return _ATN; }
+
+	public XMLParser(TokenStream input) {
+		super(input);
+		_interp = new ParserATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
+	}
+
+	public static class DocumentContext extends ParserRuleContext {
+		public ElementContext element() {
+			return getRuleContext(ElementContext.class,0);
+		}
+		public PrologContext prolog() {
+			return getRuleContext(PrologContext.class,0);
+		}
+		public List<MiscContext> misc() {
+			return getRuleContexts(MiscContext.class);
+		}
+		public MiscContext misc(int i) {
+			return getRuleContext(MiscContext.class,i);
+		}
+		public DocumentContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_document; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterDocument(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitDocument(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitDocument(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final DocumentContext document() throws RecognitionException {
+		DocumentContext _localctx = new DocumentContext(_ctx, getState());
+		enterRule(_localctx, 0, RULE_document);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(23);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if (_la==XMLDeclOpen) {
+				{
+				setState(22);
+				prolog();
+				}
+			}
+
+			setState(28);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & ((1L << COMMENT) | (1L << SEA_WS) | (1L << PI))) != 0)) {
+				{
+				{
+				setState(25);
+				misc();
+				}
+				}
+				setState(30);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(31);
+			element();
+			setState(35);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & ((1L << COMMENT) | (1L << SEA_WS) | (1L << PI))) != 0)) {
+				{
+				{
+				setState(32);
+				misc();
+				}
+				}
+				setState(37);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class PrologContext extends ParserRuleContext {
+		public TerminalNode XMLDeclOpen() { return getToken(XMLParser.XMLDeclOpen, 0); }
+		public TerminalNode SPECIAL_CLOSE() { return getToken(XMLParser.SPECIAL_CLOSE, 0); }
+		public List<AttributeContext> attribute() {
+			return getRuleContexts(AttributeContext.class);
+		}
+		public AttributeContext attribute(int i) {
+			return getRuleContext(AttributeContext.class,i);
+		}
+		public PrologContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_prolog; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterProlog(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitProlog(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitProlog(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final PrologContext prolog() throws RecognitionException {
+		PrologContext _localctx = new PrologContext(_ctx, getState());
+		enterRule(_localctx, 2, RULE_prolog);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(38);
+			match(XMLDeclOpen);
+			setState(42);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==Name) {
+				{
+				{
+				setState(39);
+				attribute();
+				}
+				}
+				setState(44);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(45);
+			match(SPECIAL_CLOSE);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class ContentContext extends ParserRuleContext {
+		public List<ChardataContext> chardata() {
+			return getRuleContexts(ChardataContext.class);
+		}
+		public ChardataContext chardata(int i) {
+			return getRuleContext(ChardataContext.class,i);
+		}
+		public List<ElementContext> element() {
+			return getRuleContexts(ElementContext.class);
+		}
+		public ElementContext element(int i) {
+			return getRuleContext(ElementContext.class,i);
+		}
+		public List<ReferenceContext> reference() {
+			return getRuleContexts(ReferenceContext.class);
+		}
+		public ReferenceContext reference(int i) {
+			return getRuleContext(ReferenceContext.class,i);
+		}
+		public List<TerminalNode> CDATA() { return getTokens(XMLParser.CDATA); }
+		public TerminalNode CDATA(int i) {
+			return getToken(XMLParser.CDATA, i);
+		}
+		public List<TerminalNode> PI() { return getTokens(XMLParser.PI); }
+		public TerminalNode PI(int i) {
+			return getToken(XMLParser.PI, i);
+		}
+		public List<TerminalNode> COMMENT() { return getTokens(XMLParser.COMMENT); }
+		public TerminalNode COMMENT(int i) {
+			return getToken(XMLParser.COMMENT, i);
+		}
+		public ContentContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_content; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterContent(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitContent(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitContent(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ContentContext content() throws RecognitionException {
+		ContentContext _localctx = new ContentContext(_ctx, getState());
+		enterRule(_localctx, 4, RULE_content);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(48);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if (_la==SEA_WS || _la==TEXT) {
+				{
+				setState(47);
+				chardata();
+				}
+			}
+
+			setState(62);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & ((1L << COMMENT) | (1L << CDATA) | (1L << EntityRef) | (1L << CharRef) | (1L << OPEN) | (1L << PI))) != 0)) {
+				{
+				{
+				setState(55);
+				_errHandler.sync(this);
+				switch (_input.LA(1)) {
+				case OPEN:
+					{
+					setState(50);
+					element();
+					}
+					break;
+				case EntityRef:
+				case CharRef:
+					{
+					setState(51);
+					reference();
+					}
+					break;
+				case CDATA:
+					{
+					setState(52);
+					match(CDATA);
+					}
+					break;
+				case PI:
+					{
+					setState(53);
+					match(PI);
+					}
+					break;
+				case COMMENT:
+					{
+					setState(54);
+					match(COMMENT);
+					}
+					break;
+				default:
+					throw new NoViableAltException(this);
+				}
+				setState(58);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if (_la==SEA_WS || _la==TEXT) {
+					{
+					setState(57);
+					chardata();
+					}
+				}
+
+				}
+				}
+				setState(64);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class ElementContext extends ParserRuleContext {
+		public NonEmptyClosingElementContext nonEmptyClosingElement() {
+			return getRuleContext(NonEmptyClosingElementContext.class,0);
+		}
+		public EmptyClosingElementContext emptyClosingElement() {
+			return getRuleContext(EmptyClosingElementContext.class,0);
+		}
+		public ElementContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_element; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterElement(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitElement(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitElement(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ElementContext element() throws RecognitionException {
+		ElementContext _localctx = new ElementContext(_ctx, getState());
+		enterRule(_localctx, 6, RULE_element);
+		try {
+			setState(67);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,8,_ctx) ) {
+			case 1:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(65);
+				nonEmptyClosingElement();
+				}
+				break;
+			case 2:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(66);
+				emptyClosingElement();
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class NonEmptyClosingElementContext extends ParserRuleContext {
+		public TerminalNode OPEN() { return getToken(XMLParser.OPEN, 0); }
+		public List<TerminalNode> Name() { return getTokens(XMLParser.Name); }
+		public TerminalNode Name(int i) {
+			return getToken(XMLParser.Name, i);
+		}
+		public List<TerminalNode> CLOSE() { return getTokens(XMLParser.CLOSE); }
+		public TerminalNode CLOSE(int i) {
+			return getToken(XMLParser.CLOSE, i);
+		}
+		public ContentContext content() {
+			return getRuleContext(ContentContext.class,0);
+		}
+		public TerminalNode OPEN_SLASH() { return getToken(XMLParser.OPEN_SLASH, 0); }
+		public List<AttributeContext> attribute() {
+			return getRuleContexts(AttributeContext.class);
+		}
+		public AttributeContext attribute(int i) {
+			return getRuleContext(AttributeContext.class,i);
+		}
+		public NonEmptyClosingElementContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_nonEmptyClosingElement; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterNonEmptyClosingElement(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitNonEmptyClosingElement(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitNonEmptyClosingElement(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final NonEmptyClosingElementContext nonEmptyClosingElement() throws RecognitionException {
+		NonEmptyClosingElementContext _localctx = new NonEmptyClosingElementContext(_ctx, getState());
+		enterRule(_localctx, 8, RULE_nonEmptyClosingElement);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(69);
+			match(OPEN);
+			setState(70);
+			match(Name);
+			setState(74);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==Name) {
+				{
+				{
+				setState(71);
+				attribute();
+				}
+				}
+				setState(76);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(77);
+			match(CLOSE);
+			setState(78);
+			content();
+			setState(79);
+			match(OPEN_SLASH);
+			setState(80);
+			match(Name);
+			setState(81);
+			match(CLOSE);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class EmptyClosingElementContext extends ParserRuleContext {
+		public TerminalNode OPEN() { return getToken(XMLParser.OPEN, 0); }
+		public TerminalNode Name() { return getToken(XMLParser.Name, 0); }
+		public TerminalNode SLASH_CLOSE() { return getToken(XMLParser.SLASH_CLOSE, 0); }
+		public List<AttributeContext> attribute() {
+			return getRuleContexts(AttributeContext.class);
+		}
+		public AttributeContext attribute(int i) {
+			return getRuleContext(AttributeContext.class,i);
+		}
+		public EmptyClosingElementContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_emptyClosingElement; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterEmptyClosingElement(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitEmptyClosingElement(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitEmptyClosingElement(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final EmptyClosingElementContext emptyClosingElement() throws RecognitionException {
+		EmptyClosingElementContext _localctx = new EmptyClosingElementContext(_ctx, getState());
+		enterRule(_localctx, 10, RULE_emptyClosingElement);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(83);
+			match(OPEN);
+			setState(84);
+			match(Name);
+			setState(88);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==Name) {
+				{
+				{
+				setState(85);
+				attribute();
+				}
+				}
+				setState(90);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(91);
+			match(SLASH_CLOSE);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class ReferenceContext extends ParserRuleContext {
+		public TerminalNode EntityRef() { return getToken(XMLParser.EntityRef, 0); }
+		public TerminalNode CharRef() { return getToken(XMLParser.CharRef, 0); }
+		public ReferenceContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_reference; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterReference(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitReference(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitReference(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ReferenceContext reference() throws RecognitionException {
+		ReferenceContext _localctx = new ReferenceContext(_ctx, getState());
+		enterRule(_localctx, 12, RULE_reference);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(93);
+			_la = _input.LA(1);
+			if ( !(_la==EntityRef || _la==CharRef) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class AttributeContext extends ParserRuleContext {
+		public TerminalNode Name() { return getToken(XMLParser.Name, 0); }
+		public TerminalNode EQUALS() { return getToken(XMLParser.EQUALS, 0); }
+		public TerminalNode STRING() { return getToken(XMLParser.STRING, 0); }
+		public PrefixContext prefix() {
+			return getRuleContext(PrefixContext.class,0);
+		}
+		public AttributeContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_attribute; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterAttribute(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitAttribute(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitAttribute(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final AttributeContext attribute() throws RecognitionException {
+		AttributeContext _localctx = new AttributeContext(_ctx, getState());
+		enterRule(_localctx, 14, RULE_attribute);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(96);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,11,_ctx) ) {
+			case 1:
+				{
+				setState(95);
+				prefix();
+				}
+				break;
+			}
+			setState(98);
+			match(Name);
+			setState(99);
+			match(EQUALS);
+			setState(100);
+			match(STRING);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class PrefixContext extends ParserRuleContext {
+		public TerminalNode Name() { return getToken(XMLParser.Name, 0); }
+		public TerminalNode COLON() { return getToken(XMLParser.COLON, 0); }
+		public PrefixContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_prefix; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterPrefix(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitPrefix(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitPrefix(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final PrefixContext prefix() throws RecognitionException {
+		PrefixContext _localctx = new PrefixContext(_ctx, getState());
+		enterRule(_localctx, 16, RULE_prefix);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(102);
+			match(Name);
+			setState(103);
+			match(COLON);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class ChardataContext extends ParserRuleContext {
+		public TerminalNode TEXT() { return getToken(XMLParser.TEXT, 0); }
+		public TerminalNode SEA_WS() { return getToken(XMLParser.SEA_WS, 0); }
+		public ChardataContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_chardata; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterChardata(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitChardata(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitChardata(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ChardataContext chardata() throws RecognitionException {
+		ChardataContext _localctx = new ChardataContext(_ctx, getState());
+		enterRule(_localctx, 18, RULE_chardata);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(105);
+			_la = _input.LA(1);
+			if ( !(_la==SEA_WS || _la==TEXT) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class MiscContext extends ParserRuleContext {
+		public TerminalNode COMMENT() { return getToken(XMLParser.COMMENT, 0); }
+		public TerminalNode PI() { return getToken(XMLParser.PI, 0); }
+		public TerminalNode SEA_WS() { return getToken(XMLParser.SEA_WS, 0); }
+		public MiscContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_misc; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).enterMisc(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof XMLParserListener ) ((XMLParserListener)listener).exitMisc(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof XMLParserVisitor ) return ((XMLParserVisitor<? extends T>)visitor).visitMisc(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final MiscContext misc() throws RecognitionException {
+		MiscContext _localctx = new MiscContext(_ctx, getState());
+		enterRule(_localctx, 20, RULE_misc);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(107);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & ((1L << COMMENT) | (1L << SEA_WS) | (1L << PI))) != 0)) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static final String _serializedATN =
+		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\3\26p\4\2\t\2\4\3\t"+
+		"\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4\13\t\13\4"+
+		"\f\t\f\3\2\5\2\32\n\2\3\2\7\2\35\n\2\f\2\16\2 \13\2\3\2\3\2\7\2$\n\2\f"+
+		"\2\16\2\'\13\2\3\3\3\3\7\3+\n\3\f\3\16\3.\13\3\3\3\3\3\3\4\5\4\63\n\4"+
+		"\3\4\3\4\3\4\3\4\3\4\5\4:\n\4\3\4\5\4=\n\4\7\4?\n\4\f\4\16\4B\13\4\3\5"+
+		"\3\5\5\5F\n\5\3\6\3\6\3\6\7\6K\n\6\f\6\16\6N\13\6\3\6\3\6\3\6\3\6\3\6"+
+		"\3\6\3\7\3\7\3\7\7\7Y\n\7\f\7\16\7\\\13\7\3\7\3\7\3\b\3\b\3\t\5\tc\n\t"+
+		"\3\t\3\t\3\t\3\t\3\n\3\n\3\n\3\13\3\13\3\f\3\f\3\f\2\2\r\2\4\6\b\n\f\16"+
+		"\20\22\24\26\2\5\3\2\7\b\4\2\t\t\r\r\5\2\4\4\t\t\26\26\2s\2\31\3\2\2\2"+
+		"\4(\3\2\2\2\6\62\3\2\2\2\bE\3\2\2\2\nG\3\2\2\2\fU\3\2\2\2\16_\3\2\2\2"+
+		"\20b\3\2\2\2\22h\3\2\2\2\24k\3\2\2\2\26m\3\2\2\2\30\32\5\4\3\2\31\30\3"+
+		"\2\2\2\31\32\3\2\2\2\32\36\3\2\2\2\33\35\5\26\f\2\34\33\3\2\2\2\35 \3"+
+		"\2\2\2\36\34\3\2\2\2\36\37\3\2\2\2\37!\3\2\2\2 \36\3\2\2\2!%\5\b\5\2\""+
+		"$\5\26\f\2#\"\3\2\2\2$\'\3\2\2\2%#\3\2\2\2%&\3\2\2\2&\3\3\2\2\2\'%\3\2"+
+		"\2\2(,\7\f\2\2)+\5\20\t\2*)\3\2\2\2+.\3\2\2\2,*\3\2\2\2,-\3\2\2\2-/\3"+
+		"\2\2\2.,\3\2\2\2/\60\7\17\2\2\60\5\3\2\2\2\61\63\5\24\13\2\62\61\3\2\2"+
+		"\2\62\63\3\2\2\2\63@\3\2\2\2\64:\5\b\5\2\65:\5\16\b\2\66:\7\5\2\2\67:"+
+		"\7\26\2\28:\7\4\2\29\64\3\2\2\29\65\3\2\2\29\66\3\2\2\29\67\3\2\2\298"+
+		"\3\2\2\2:<\3\2\2\2;=\5\24\13\2<;\3\2\2\2<=\3\2\2\2=?\3\2\2\2>9\3\2\2\2"+
+		"?B\3\2\2\2@>\3\2\2\2@A\3\2\2\2A\7\3\2\2\2B@\3\2\2\2CF\5\n\6\2DF\5\f\7"+
+		"\2EC\3\2\2\2ED\3\2\2\2F\t\3\2\2\2GH\7\n\2\2HL\7\24\2\2IK\5\20\t\2JI\3"+
+		"\2\2\2KN\3\2\2\2LJ\3\2\2\2LM\3\2\2\2MO\3\2\2\2NL\3\2\2\2OP\7\16\2\2PQ"+
+		"\5\6\4\2QR\7\13\2\2RS\7\24\2\2ST\7\16\2\2T\13\3\2\2\2UV\7\n\2\2VZ\7\24"+
+		"\2\2WY\5\20\t\2XW\3\2\2\2Y\\\3\2\2\2ZX\3\2\2\2Z[\3\2\2\2[]\3\2\2\2\\Z"+
+		"\3\2\2\2]^\7\20\2\2^\r\3\2\2\2_`\t\2\2\2`\17\3\2\2\2ac\5\22\n\2ba\3\2"+
+		"\2\2bc\3\2\2\2cd\3\2\2\2de\7\24\2\2ef\7\22\2\2fg\7\23\2\2g\21\3\2\2\2"+
+		"hi\7\24\2\2ij\7\3\2\2j\23\3\2\2\2kl\t\3\2\2l\25\3\2\2\2mn\t\4\2\2n\27"+
+		"\3\2\2\2\16\31\36%,\629<@ELZb";
+	public static final ATN _ATN =
+		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
+	static {
+		_decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
+		for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
+			_decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), i);
+		}
+	}
+}
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.tokens b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.tokens
new file mode 100644
index 000000000..393ca1ed1
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParser.tokens
@@ -0,0 +1,27 @@
+COLON=1
+COMMENT=2
+CDATA=3
+DTD=4
+EntityRef=5
+CharRef=6
+SEA_WS=7
+OPEN=8
+OPEN_SLASH=9
+XMLDeclOpen=10
+TEXT=11
+CLOSE=12
+SPECIAL_CLOSE=13
+SLASH_CLOSE=14
+SLASH=15
+EQUALS=16
+STRING=17
+Name=18
+S=19
+PI=20
+':'=1
+'<'=8
+'</'=9
+'>'=12
+'/>'=14
+'/'=15
+'='=16
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseListener.java b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseListener.java
new file mode 100644
index 000000000..83b3b978a
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseListener.java
@@ -0,0 +1,171 @@
+// Generated from D:/Projects/AndroidStudioProjects/AndroidIDE/lexers/src/main/java/com/itsaky/androidide/lexers/xml\XMLParser.g4 by ANTLR 4.9.2
+package com.itsaky.androidide.lexers.xml;
+
+import org.antlr.v4.runtime.ParserRuleContext;
+import org.antlr.v4.runtime.tree.ErrorNode;
+import org.antlr.v4.runtime.tree.TerminalNode;
+
+/**
+ * This class provides an empty implementation of {@link XMLParserListener},
+ * which can be extended to create a listener which only needs to handle a subset
+ * of the available methods.
+ */
+public class XMLParserBaseListener implements XMLParserListener {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterDocument(XMLParser.DocumentContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitDocument(XMLParser.DocumentContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterProlog(XMLParser.PrologContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitProlog(XMLParser.PrologContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterContent(XMLParser.ContentContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitContent(XMLParser.ContentContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterElement(XMLParser.ElementContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitElement(XMLParser.ElementContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterNonEmptyClosingElement(XMLParser.NonEmptyClosingElementContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitNonEmptyClosingElement(XMLParser.NonEmptyClosingElementContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterEmptyClosingElement(XMLParser.EmptyClosingElementContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitEmptyClosingElement(XMLParser.EmptyClosingElementContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterReference(XMLParser.ReferenceContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitReference(XMLParser.ReferenceContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterAttribute(XMLParser.AttributeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitAttribute(XMLParser.AttributeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterPrefix(XMLParser.PrefixContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitPrefix(XMLParser.PrefixContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterChardata(XMLParser.ChardataContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitChardata(XMLParser.ChardataContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterMisc(XMLParser.MiscContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitMisc(XMLParser.MiscContext ctx) { }
+
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterEveryRule(ParserRuleContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitEveryRule(ParserRuleContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void visitTerminal(TerminalNode node) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void visitErrorNode(ErrorNode node) { }
+}
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseVisitor.java b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseVisitor.java
new file mode 100644
index 000000000..4f59662a1
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserBaseVisitor.java
@@ -0,0 +1,91 @@
+// Generated from D:/Projects/AndroidStudioProjects/AndroidIDE/lexers/src/main/java/com/itsaky/androidide/lexers/xml\XMLParser.g4 by ANTLR 4.9.2
+package com.itsaky.androidide.lexers.xml;
+import org.antlr.v4.runtime.tree.AbstractParseTreeVisitor;
+
+/**
+ * This class provides an empty implementation of {@link XMLParserVisitor},
+ * which can be extended to create a visitor which only needs to handle a subset
+ * of the available methods.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+public class XMLParserBaseVisitor<T> extends AbstractParseTreeVisitor<T> implements XMLParserVisitor<T> {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitDocument(XMLParser.DocumentContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitProlog(XMLParser.PrologContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitContent(XMLParser.ContentContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitElement(XMLParser.ElementContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitNonEmptyClosingElement(XMLParser.NonEmptyClosingElementContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitEmptyClosingElement(XMLParser.EmptyClosingElementContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitReference(XMLParser.ReferenceContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitAttribute(XMLParser.AttributeContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitPrefix(XMLParser.PrefixContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitChardata(XMLParser.ChardataContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitMisc(XMLParser.MiscContext ctx) { return visitChildren(ctx); }
+}
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserListener.java b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserListener.java
new file mode 100644
index 000000000..2a21247e4
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserListener.java
@@ -0,0 +1,120 @@
+// Generated from D:/Projects/AndroidStudioProjects/AndroidIDE/lexers/src/main/java/com/itsaky/androidide/lexers/xml\XMLParser.g4 by ANTLR 4.9.2
+package com.itsaky.androidide.lexers.xml;
+import org.antlr.v4.runtime.tree.ParseTreeListener;
+
+/**
+ * This interface defines a complete listener for a parse tree produced by
+ * {@link XMLParser}.
+ */
+public interface XMLParserListener extends ParseTreeListener {
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#document}.
+	 * @param ctx the parse tree
+	 */
+	void enterDocument(XMLParser.DocumentContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#document}.
+	 * @param ctx the parse tree
+	 */
+	void exitDocument(XMLParser.DocumentContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#prolog}.
+	 * @param ctx the parse tree
+	 */
+	void enterProlog(XMLParser.PrologContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#prolog}.
+	 * @param ctx the parse tree
+	 */
+	void exitProlog(XMLParser.PrologContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#content}.
+	 * @param ctx the parse tree
+	 */
+	void enterContent(XMLParser.ContentContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#content}.
+	 * @param ctx the parse tree
+	 */
+	void exitContent(XMLParser.ContentContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#element}.
+	 * @param ctx the parse tree
+	 */
+	void enterElement(XMLParser.ElementContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#element}.
+	 * @param ctx the parse tree
+	 */
+	void exitElement(XMLParser.ElementContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#nonEmptyClosingElement}.
+	 * @param ctx the parse tree
+	 */
+	void enterNonEmptyClosingElement(XMLParser.NonEmptyClosingElementContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#nonEmptyClosingElement}.
+	 * @param ctx the parse tree
+	 */
+	void exitNonEmptyClosingElement(XMLParser.NonEmptyClosingElementContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#emptyClosingElement}.
+	 * @param ctx the parse tree
+	 */
+	void enterEmptyClosingElement(XMLParser.EmptyClosingElementContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#emptyClosingElement}.
+	 * @param ctx the parse tree
+	 */
+	void exitEmptyClosingElement(XMLParser.EmptyClosingElementContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#reference}.
+	 * @param ctx the parse tree
+	 */
+	void enterReference(XMLParser.ReferenceContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#reference}.
+	 * @param ctx the parse tree
+	 */
+	void exitReference(XMLParser.ReferenceContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#attribute}.
+	 * @param ctx the parse tree
+	 */
+	void enterAttribute(XMLParser.AttributeContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#attribute}.
+	 * @param ctx the parse tree
+	 */
+	void exitAttribute(XMLParser.AttributeContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#prefix}.
+	 * @param ctx the parse tree
+	 */
+	void enterPrefix(XMLParser.PrefixContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#prefix}.
+	 * @param ctx the parse tree
+	 */
+	void exitPrefix(XMLParser.PrefixContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#chardata}.
+	 * @param ctx the parse tree
+	 */
+	void enterChardata(XMLParser.ChardataContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#chardata}.
+	 * @param ctx the parse tree
+	 */
+	void exitChardata(XMLParser.ChardataContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link XMLParser#misc}.
+	 * @param ctx the parse tree
+	 */
+	void enterMisc(XMLParser.MiscContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link XMLParser#misc}.
+	 * @param ctx the parse tree
+	 */
+	void exitMisc(XMLParser.MiscContext ctx);
+}
\ No newline at end of file
diff --git a/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserVisitor.java b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserVisitor.java
new file mode 100644
index 000000000..1b9e32bbc
--- /dev/null
+++ b/lexers/src/main/java/com/itsaky/androidide/lexers/xml/XMLParserVisitor.java
@@ -0,0 +1,79 @@
+// Generated from D:/Projects/AndroidStudioProjects/AndroidIDE/lexers/src/main/java/com/itsaky/androidide/lexers/xml\XMLParser.g4 by ANTLR 4.9.2
+package com.itsaky.androidide.lexers.xml;
+import org.antlr.v4.runtime.tree.ParseTreeVisitor;
+
+/**
+ * This interface defines a complete generic visitor for a parse tree produced
+ * by {@link XMLParser}.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+public interface XMLParserVisitor<T> extends ParseTreeVisitor<T> {
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#document}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitDocument(XMLParser.DocumentContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#prolog}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitProlog(XMLParser.PrologContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#content}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitContent(XMLParser.ContentContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#element}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitElement(XMLParser.ElementContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#nonEmptyClosingElement}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitNonEmptyClosingElement(XMLParser.NonEmptyClosingElementContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#emptyClosingElement}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitEmptyClosingElement(XMLParser.EmptyClosingElementContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#reference}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitReference(XMLParser.ReferenceContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#attribute}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitAttribute(XMLParser.AttributeContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#prefix}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitPrefix(XMLParser.PrefixContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#chardata}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitChardata(XMLParser.ChardataContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link XMLParser#misc}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitMisc(XMLParser.MiscContext ctx);
+}
\ No newline at end of file
diff --git a/lsp/api/build.gradle b/lsp/api/build.gradle
index 36051865b..53be072e1 100644
--- a/lsp/api/build.gradle
+++ b/lsp/api/build.gradle
@@ -40,6 +40,10 @@ android {
 dependencies {
     implementation "androidx.core:core-ktx:1.7.0"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
+    // LSP CompletionItem extends Editor's completion item
+    compileOnly project(':common')
+    compileOnly project(':editor')
 }
 repositories {
     mavenCentral()
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/api/ICodeAnalyzer.java b/lsp/api/src/main/java/com/itsaky/lsp/api/IDiagnosticProvider.java
similarity index 86%
rename from lsp/api/src/main/java/com/itsaky/lsp/api/ICodeAnalyzer.java
rename to lsp/api/src/main/java/com/itsaky/lsp/api/IDiagnosticProvider.java
index 70c84bbb1..7997155e7 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/api/ICodeAnalyzer.java
+++ b/lsp/api/src/main/java/com/itsaky/lsp/api/IDiagnosticProvider.java
@@ -19,8 +19,10 @@ package com.itsaky.lsp.api;
 
 import androidx.annotation.NonNull;
 
-import com.itsaky.lsp.models.AnalyzeParams;
-import com.itsaky.lsp.models.AnalyzeResult;
+import com.itsaky.lsp.models.DiagnosticItem;
+
+import java.nio.file.Path;
+import java.util.List;
 
 /**
  * A code analyzer analyzes the code and provides
@@ -28,7 +30,7 @@ import com.itsaky.lsp.models.AnalyzeResult;
  *
  * @author Akash Yadav
  */
-public interface ICodeAnalyzer {
+public interface IDiagnosticProvider {
     
     /**
      * Analyze the file given in the params.
@@ -36,5 +38,5 @@ public interface ICodeAnalyzer {
      * @return The result of the analysis containing diagnostics and semantic highlighting.
      */
     @NonNull
-    AnalyzeResult analyze (AnalyzeParams params);
+    List<DiagnosticItem> analyze (Path file);
 }
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/api/ILanguageServer.java b/lsp/api/src/main/java/com/itsaky/lsp/api/ILanguageServer.java
index 8c40b444f..a04a2618a 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/api/ILanguageServer.java
+++ b/lsp/api/src/main/java/com/itsaky/lsp/api/ILanguageServer.java
@@ -159,7 +159,7 @@ public interface ILanguageServer {
      * @return The code analyzer.
      */
     @NonNull
-    ICodeAnalyzer getCodeAnalyzer ();
+    IDiagnosticProvider getCodeAnalyzer ();
     
     /**
      * Thrown to indicate that a language server received an initialize notification
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/models/Completions.kt b/lsp/api/src/main/java/com/itsaky/lsp/models/Completions.kt
index 7a9784f96..935a02c1a 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/models/Completions.kt
+++ b/lsp/api/src/main/java/com/itsaky/lsp/models/Completions.kt
@@ -18,10 +18,11 @@
 package com.itsaky.lsp.models
 
 import android.text.TextUtils
-import java.lang.IllegalArgumentException
+import com.itsaky.androidide.utils.Logger
+import io.github.rosemoe.sora.text.Content
+import io.github.rosemoe.sora.widget.CodeEditor
 import java.nio.file.Path
-import java.util.*
-import kotlin.collections.ArrayList
+import java.util.regex.Pattern
 
 data class CompletionParams (var position: Position, var file: Path) {
     var content: CharSequence? = null
@@ -37,13 +38,9 @@ data class CompletionParams (var position: Position, var file: Path) {
     
     fun requireContents () : CharSequence {
         if (content == null) {
-            throw IllegalArgumentException("Content is required but no content was provided!");
+            throw IllegalArgumentException("Content is required but no content was provided!")
         }
-        return content as CharSequence;
-    }
-    
-    fun discardContents () {
-        content = null
+        return content as CharSequence
     }
 }
 
@@ -55,7 +52,7 @@ data class CompletionResult (var isIncomplete: Boolean, var items: List<Completi
     }
 }
 
-data class CompletionItem(var label: String,
+data class CompletionItem(@JvmField var label: String,
                           var detail: String,
                           var insertText: String?,
                           var insertTextFormat: InsertTextFormat?,
@@ -63,7 +60,7 @@ data class CompletionItem(var label: String,
                           var command: Command?,
                           var kind: CompletionItemKind,
                           var additionalTextEdits: List<TextEdit>?,
-                          var data: CompletionData?) {
+                          var data: CompletionData?) : io.github.rosemoe.sora.lang.completion.CompletionItem(label, detail) {
     constructor() : this(
         "",
         "",
@@ -76,9 +73,100 @@ data class CompletionItem(var label: String,
         null
     )
     
+    companion object {
+        private val LOG = Logger.instance("CompletionItem")
+    }
+    
+    fun setLabel (label: String) {
+        this.label = label
+    }
+    
+    fun getLabel () : String = this.label as String
+    
     override fun toString(): String {
         return "CompletionItem(label='$label', detail='$detail', insertText='$insertText', insertTextFormat=$insertTextFormat, sortText='$sortText', command=$command, kind=$kind, data=$data)"
     }
+    
+    override fun performCompletion(editor: CodeEditor, text: Content, line: Int, column: Int) {
+        val start = getIdentifierStart(text.getLine(line), column)
+        val insert = if (insertText == null) label else insertText
+        val shift = insert!!.contains("$0")
+        
+        text.delete(line, start, line, column)
+        
+        if (text.contains("\n")) {
+            val lines = insert.split(Pattern.quote("\n"))
+            var i = 0
+            lines.forEach {
+                if (i != 0) {
+                    editor.commitText("\n")
+                }
+                editor.commitText(it)
+                i++
+            }
+        } else {
+            editor.commitText(text)
+        }
+        
+        if (shift) {
+            val l = editor.cursor.leftLine
+            val t = editor.text.getLineString(l)
+            val c = t.lastIndexOf("$0")
+            
+            if (c != -1) {
+                editor.setSelection(l, c)
+                editor.text.delete(l, c, l, c + 2)
+            }
+        }
+        
+        if (additionalTextEdits != null && additionalTextEdits!!.isNotEmpty()) {
+            additionalTextEdits!!.forEach {
+                val s = it.range.start
+                val e = it.range.end
+                if (s == e) {
+                    editor.text.insert(s.line, s.column, it.newText)
+                } else {
+                    editor.text.replace(s.line, s.column, e.line, e.column, it.newText)
+                }
+            }
+        }
+        
+        if (command != null ) {
+            if ("editor.action.triggerParameterHints" == command!!.command) {
+                performSignatureHelp(editor)
+            }
+        }
+    }
+    
+    private fun performSignatureHelp (editor: CodeEditor) {
+        // We use reflection to invoke the 'signatureHelp' method in IDEEditor
+        // As the IDEEditor class is heavily dependent on the :app module,
+        // we cannot declare it as a dependency of this (:lsp:api) module
+        // If we do, Gradle will complain about recursive dependencies because :app depends on :lsp:api
+        try {
+            val clazz = editor.javaClass
+            val method = clazz.getMethod("signatureHelp")
+            method.isAccessible = true
+            method.invoke(editor)
+        } catch (e: Throwable) {
+            LOG.error("Unable to invoke IDEEditor#signatureHelp()", e)
+        }
+    }
+    
+    private fun getIdentifierStart (text: CharSequence, end: Int) : Int {
+        
+        var start = end
+        while (start >= 0) {
+            if (Character.isJavaIdentifierPart(text[start - 1])) {
+                start --
+                continue
+            }
+            
+            break
+        }
+        
+        return start
+    }
 }
 
 data class CompletionData(
@@ -129,9 +217,7 @@ data class CompletionData(
     }
 }
 
-data class Command (var title: String, var command: String) {
-    constructor() : this ("", "")
-}
+data class Command (var title: String, var command: String)
 
 enum class CompletionItemKind {
     CLASS,
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/models/Diagnostics.kt b/lsp/api/src/main/java/com/itsaky/lsp/models/Diagnostics.kt
index a638fd193..c4fa1bc65 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/models/Diagnostics.kt
+++ b/lsp/api/src/main/java/com/itsaky/lsp/models/Diagnostics.kt
@@ -23,9 +23,7 @@ data class DiagnosticItem(var message: String, var code: String, var range: Rang
     constructor() : this ("", "", Range.NONE, "", DiagnosticSeverity.HINT)
 }
 
-data class DiagnosticResult(var file: Path, var diagnostics: List<DiagnosticItem>) {
-
-}
+data class DiagnosticResult(var file: Path, var diagnostics: List<DiagnosticItem>)
 enum class DiagnosticSeverity {
     ERROR, WARNING, INFO, HINT
 }
\ No newline at end of file
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/models/TextDocument.kt b/lsp/api/src/main/java/com/itsaky/lsp/models/TextDocument.kt
index dc7fa43fc..4037be16d 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/models/TextDocument.kt
+++ b/lsp/api/src/main/java/com/itsaky/lsp/models/TextDocument.kt
@@ -36,7 +36,7 @@ data class DocumentOpenEvent (var openedFile: Path,
 data class DocumentCloseEvent (var closedFile: Path) : DocumentEvent (closedFile)
 
 data class DocumentChangeEvent (var changedFile: Path,
-                                var newText: String,
+                                var newText: CharSequence,
                                 var version: Int) : DocumentEvent (changedFile)
 
 data class DocumentSaveEvent (var savedFile: Path) : DocumentEvent (savedFile)
diff --git a/lsp/api/src/main/java/com/itsaky/lsp/models/CodeAnalysis.kt b/lsp/api/src/main/java/com/itsaky/lsp/util/NoDiagnosticProvider.kt
similarity index 72%
rename from lsp/api/src/main/java/com/itsaky/lsp/models/CodeAnalysis.kt
rename to lsp/api/src/main/java/com/itsaky/lsp/util/NoDiagnosticProvider.kt
index 5c2422e93..3c6ad2350 100644
--- a/lsp/api/src/main/java/com/itsaky/lsp/models/CodeAnalysis.kt
+++ b/lsp/api/src/main/java/com/itsaky/lsp/util/NoDiagnosticProvider.kt
@@ -15,11 +15,15 @@
  *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.itsaky.lsp.models
+package com.itsaky.lsp.util
 
+import com.itsaky.lsp.api.IDiagnosticProvider
+import com.itsaky.lsp.models.DiagnosticItem
 import java.nio.file.Path
 
-data class AnalyzeParams(var file: Path)
-data class AnalyzeResult (var diagnostics: List<DiagnosticItem>, var semanticHighlights: List<HighlightToken>) {
-    constructor() : this (ArrayList(), ArrayList())
+/**
+ * @author Akash Yadav
+ */
+class NoDiagnosticProvider : IDiagnosticProvider {
+    override fun analyze(file: Path?): List<DiagnosticItem> = ArrayList();
 }
\ No newline at end of file
diff --git a/lsp/java/build.gradle b/lsp/java/build.gradle
index 07c6144df..5f0dc499a 100644
--- a/lsp/java/build.gradle
+++ b/lsp/java/build.gradle
@@ -46,7 +46,8 @@ dependencies {
     implementation "com.github.marschall:zipfilesystem-standalone:1.0.1"
 
     compileOnly androidx.appcompat
-    compileOnly project(path: ':common')
+    compileOnly project(':common')
+    compileOnly project(':editor')
 
     implementation project(path: ':lsp:api')
     implementation fileTree(dir: 'libs', include: ['*.aar', '*.jar'])
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/FileStore.java b/lsp/java/src/main/java/com/itsaky/lsp/java/FileStore.java
index 28f10dae9..5290cd6f8 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/FileStore.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/FileStore.java
@@ -4,6 +4,8 @@ import android.text.TextUtils;
 
 import androidx.annotation.NonNull;
 
+import com.itsaky.androidide.utils.CharSequenceInputStream;
+import com.itsaky.androidide.utils.CharSequenceReader;
 import com.itsaky.androidide.utils.Logger;
 import com.itsaky.lsp.java.utils.StringSearch;
 import com.itsaky.lsp.models.DocumentChangeEvent;
@@ -214,7 +216,7 @@ public class FileStore {
         }
         
         // We do not support range changes
-        String newText = params.getNewText ();
+        CharSequence newText = params.getNewText ();
         activeDocuments.put (document, new VersionedContent (newText, params.getVersion ()));
     }
     
@@ -231,7 +233,7 @@ public class FileStore {
         return activeDocuments.keySet ();
     }
     
-    public static String contents (Path file) {
+    public static CharSequence contents (Path file) {
         if (!isJavaFile (file)) {
             throw new RuntimeException (file + " is not a java file");
         }
@@ -256,9 +258,8 @@ public class FileStore {
     
     public static InputStream inputStream (Path file) {
         if (activeDocuments.containsKey (file)) {
-            String string = Objects.requireNonNull (activeDocuments.get (file)).content;
-            byte[] bytes = string.getBytes ();
-            return new ByteArrayInputStream (bytes);
+            CharSequence content = Objects.requireNonNull (activeDocuments.get (file)).content;
+            return new CharSequenceInputStream (content, "UTF-8");
         }
         
         try {
@@ -274,8 +275,8 @@ public class FileStore {
     
     public static BufferedReader bufferedReader (Path file) {
         if (activeDocuments.containsKey (file)) {
-            String string = Objects.requireNonNull (activeDocuments.get (file)).content;
-            return new BufferedReader (new StringReader (string));
+            CharSequence string = Objects.requireNonNull (activeDocuments.get (file)).content;
+            return new BufferedReader (new CharSequenceReader (string));
         }
         
         try {
@@ -339,11 +340,11 @@ public class FileStore {
     }
     
     static class VersionedContent {
-        final String content;
+        final CharSequence content;
         final int version;
         final Instant modified = Instant.now ();
         
-        VersionedContent (String content, int version) {
+        VersionedContent (CharSequence content, int version) {
             Objects.requireNonNull (content, "content is null");
             this.content = content;
             this.version = version;
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/JavaLanguageServer.java b/lsp/java/src/main/java/com/itsaky/lsp/java/JavaLanguageServer.java
index 6452f9913..1bb31cdb0 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/JavaLanguageServer.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/JavaLanguageServer.java
@@ -22,7 +22,7 @@ import androidx.annotation.Nullable;
 
 import com.itsaky.androidide.utils.Logger;
 import com.itsaky.lsp.api.ICodeActionProvider;
-import com.itsaky.lsp.api.ICodeAnalyzer;
+import com.itsaky.lsp.api.IDiagnosticProvider;
 import com.itsaky.lsp.api.ICompletionProvider;
 import com.itsaky.lsp.api.IDefinitionProvider;
 import com.itsaky.lsp.api.IDocumentHandler;
@@ -38,7 +38,7 @@ import com.itsaky.lsp.java.models.JavaServerConfiguration;
 import com.itsaky.lsp.java.providers.CodeActionProvider;
 import com.itsaky.lsp.java.providers.CompletionProvider;
 import com.itsaky.lsp.java.providers.DefinitionProvider;
-import com.itsaky.lsp.java.providers.JavaCodeAnalyzer;
+import com.itsaky.lsp.java.providers.JavaDiagnosticProvider;
 import com.itsaky.lsp.java.providers.JavaSelectionProvider;
 import com.itsaky.lsp.java.providers.ReferenceProvider;
 import com.itsaky.lsp.java.providers.SignatureProvider;
@@ -48,9 +48,8 @@ import com.itsaky.lsp.models.DocumentOpenEvent;
 import com.itsaky.lsp.models.DocumentSaveEvent;
 import com.itsaky.lsp.models.InitializeParams;
 import com.itsaky.lsp.models.InitializeResult;
-import com.itsaky.lsp.util.DefaultServerSettings;
 import com.itsaky.lsp.util.NoCodeActionsProvider;
-import com.itsaky.lsp.util.NoCodeAnalyzer;
+import com.itsaky.lsp.util.NoDiagnosticProvider;
 import com.itsaky.lsp.util.NoCompletionsProvider;
 import com.itsaky.lsp.util.NoDefinitionProvider;
 import com.itsaky.lsp.util.NoReferenceProvider;
@@ -240,12 +239,12 @@ public class JavaLanguageServer implements ILanguageServer, IDocumentHandler {
     
     @NonNull
     @Override
-    public ICodeAnalyzer getCodeAnalyzer () {
+    public IDiagnosticProvider getCodeAnalyzer () {
         if (!settings.codeAnalysisEnabled ()) {
-            return new NoCodeAnalyzer ();
+            return new NoDiagnosticProvider ();
         }
         
-        return new JavaCodeAnalyzer (getCompiler ());
+        return new JavaDiagnosticProvider (getCompiler ());
     }
     
     @Override
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/compiler/CompileBatch.java b/lsp/java/src/main/java/com/itsaky/lsp/java/compiler/CompileBatch.java
index a747822b3..9074c2a69 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/compiler/CompileBatch.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/compiler/CompileBatch.java
@@ -17,6 +17,8 @@
 
 package com.itsaky.lsp.java.compiler;
 
+import static android.text.TextUtils.substring;
+
 import com.itsaky.androidide.utils.Environment;
 import com.itsaky.androidide.utils.Logger;
 import com.itsaky.lsp.java.FileStore;
@@ -99,10 +101,10 @@ public class CompileBatch implements AutoCloseable {
     
     private String errorText (javax.tools.Diagnostic<? extends javax.tools.JavaFileObject> err) {
         Path file = Paths.get (err.getSource ().toUri ());
-        String contents = FileStore.contents (file);
+        CharSequence contents = FileStore.contents (file);
         int begin = (int) err.getStartPosition ();
         int end = (int) err.getEndPosition ();
-        return contents.substring (begin, end);
+        return substring (contents, begin, end);
     }
     
     private String packageName (javax.tools.Diagnostic<? extends javax.tools.JavaFileObject> err) {
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/providers/JavaCodeAnalyzer.java b/lsp/java/src/main/java/com/itsaky/lsp/java/providers/JavaDiagnosticProvider.java
similarity index 70%
rename from lsp/java/src/main/java/com/itsaky/lsp/java/providers/JavaCodeAnalyzer.java
rename to lsp/java/src/main/java/com/itsaky/lsp/java/providers/JavaDiagnosticProvider.java
index f71f8acad..069873dd9 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/providers/JavaCodeAnalyzer.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/providers/JavaDiagnosticProvider.java
@@ -19,42 +19,40 @@ package com.itsaky.lsp.java.providers;
 
 import androidx.annotation.NonNull;
 
-import com.itsaky.lsp.api.ICodeAnalyzer;
+import com.itsaky.lsp.api.IDiagnosticProvider;
 import com.itsaky.lsp.java.compiler.CompileTask;
 import com.itsaky.lsp.java.compiler.CompilerProvider;
 import com.itsaky.lsp.java.compiler.SynchronizedTask;
-import com.itsaky.lsp.models.AnalyzeParams;
-import com.itsaky.lsp.models.AnalyzeResult;
+import com.itsaky.lsp.models.DiagnosticItem;
 
 import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * Code analyzer for java source code.
  *
  * @author Akash Yadav
  */
-public class JavaCodeAnalyzer implements ICodeAnalyzer {
+public class JavaDiagnosticProvider implements IDiagnosticProvider {
     
     private final CompilerProvider compiler;
     
-    public JavaCodeAnalyzer (CompilerProvider compiler) {
+    public JavaDiagnosticProvider (CompilerProvider compiler) {
         this.compiler = compiler;
     }
     
     @NonNull
     @Override
-    public AnalyzeResult analyze (@NonNull AnalyzeParams params) {
-        final Path file = params.getFile ();
+    public List<DiagnosticItem> analyze (@NonNull Path file) {
         final SynchronizedTask synchronizedTask = compiler.compile (file);
         return synchronizedTask.getWithTask (task -> {
-            final AnalyzeResult result = new AnalyzeResult ();
             if (!isTaskValid (task)) {
-                return result;
+                // Do not use Collections.emptyList ()
+                return new ArrayList<> ();
             }
-        
-            result.setDiagnostics (DiagnosticsProvider.findDiagnostics (task, file));
-            result.setSemanticHighlights (SemanticHighlightProvider.highlight (task, file));
-            return result;
+            
+            return DiagnosticsProvider.findDiagnostics (task, file);
         });
     }
     
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/utils/EditHelper.java b/lsp/java/src/main/java/com/itsaky/lsp/java/utils/EditHelper.java
index d9a63dece..86976d75a 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/utils/EditHelper.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/utils/EditHelper.java
@@ -124,7 +124,7 @@ public class EditHelper {
         return (int) (startClass - startLine);
     }
     
-    public static int indent (final String contents, final int cursor) {
+    public static int indent (final CharSequence contents, final int cursor) {
         int indent = 0;
         for (int i=0;i<=cursor && i<contents.length();i++) {
             char c = contents.charAt(i);
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/utils/StringSearch.java b/lsp/java/src/main/java/com/itsaky/lsp/java/utils/StringSearch.java
index 7e835b828..95ba63ba5 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/utils/StringSearch.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/utils/StringSearch.java
@@ -17,22 +17,28 @@
 
 package com.itsaky.lsp.java.utils;
 
+import com.itsaky.androidide.utils.CharSequenceReader;
+import com.itsaky.androidide.utils.Logger;
 import com.itsaky.lsp.java.FileStore;
 import com.itsaky.lsp.util.StringUtils;
 
 import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.Reader;
+import java.io.Writer;
 import java.net.URI;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
 import java.nio.channels.FileChannel;
+import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.util.Arrays;
-import java.util.Locale;
 import java.util.Objects;
-import java.util.logging.Logger;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -241,7 +247,7 @@ public class StringSearch {
     // TODO cache the progress made by searching shorter queries
     public static boolean containsWordMatching (Path java, String query) {
         if (FileStore.activeDocuments ().contains (java)) {
-            String text = FileStore.contents (java);
+            CharSequence text = FileStore.contents (java);
             return matchesTitleCase (text, query);
         }
         try (FileChannel channel = FileChannel.open (java)) {
@@ -254,7 +260,7 @@ public class StringSearch {
             CharBuffer chars = StandardCharsets.UTF_8.decode (SEARCH_BUFFER);
             return matchesTitleCase (chars, query);
         } catch (NoSuchFileException e) {
-            LOG.warning (e.getMessage ());
+            LOG.warn (e.getMessage ());
             return false;
         } catch (IOException e) {
             throw new RuntimeException (e);
@@ -264,7 +270,12 @@ public class StringSearch {
     public static boolean containsWord (Path java, String query) {
         StringSearch search = new StringSearch (query);
         if (FileStore.activeDocuments ().contains (java)) {
-            byte[] text = FileStore.contents (java).getBytes ();
+            byte[] text = new byte[0];
+            try {
+                text = toByteArray (new CharSequenceReader (FileStore.contents (java)), Charset.defaultCharset ());
+            } catch (IOException e) {
+                LOG.error (e);
+            }
             return search.nextWord (text) != -1;
         }
         try (FileChannel channel = FileChannel.open (java)) {
@@ -276,7 +287,7 @@ public class StringSearch {
             SEARCH_BUFFER.position (0);
             return search.nextWord (SEARCH_BUFFER) != -1;
         } catch (NoSuchFileException e) {
-            LOG.warning (e.getMessage ());
+            LOG.warn (e.getMessage ());
             return false;
         } catch (IOException e) {
             throw new RuntimeException (e);
@@ -286,7 +297,12 @@ public class StringSearch {
     private static boolean containsString (Path java, String query) {
         StringSearch search = new StringSearch (query);
         if (FileStore.activeDocuments ().contains (java)) {
-            byte[] text = FileStore.contents (java).getBytes ();
+            byte[] text = new byte[0];
+            try {
+                text = toByteArray (new CharSequenceReader (FileStore.contents (java)), Charset.defaultCharset ());
+            } catch (IOException e) {
+                LOG.error (e);
+            }
             return search.next (text) != -1;
         }
         try (FileChannel channel = FileChannel.open (java)) {
@@ -298,7 +314,7 @@ public class StringSearch {
             SEARCH_BUFFER.position (0);
             return search.next (SEARCH_BUFFER) != -1;
         } catch (NoSuchFileException e) {
-            LOG.warning (e.getMessage ());
+            LOG.warn (e.getMessage ());
             return false;
         } catch (IOException e) {
             throw new RuntimeException (e);
@@ -337,11 +353,9 @@ public class StringSearch {
                         // TODO match things like fb ~ foo_bar
                         boolean isStartOfWord = Character.isUpperCase (c);
                         boolean isMatch = Character.toLowerCase (f) == Character.toLowerCase (c);
+                        i++;
                         if (isStartOfWord && isMatch) {
-                            i++;
                             break;
-                        } else {
-                            i++;
                         }
                     }
                     if (i >= candidate.length ()) {
@@ -453,5 +467,48 @@ public class StringSearch {
         return StringUtils.matchesPartialName (candidate, partialName, allLower);
     }
     
-    private static final Logger LOG = Logger.getLogger ("main");
+    public static byte[] toByteArray(final Reader reader, final Charset charset) throws IOException {
+        try (final ByteArrayOutputStream output = new ByteArrayOutputStream()) {
+            copy(reader, output, charset);
+            return output.toByteArray();
+        }
+    }
+    
+    public static void copy(final Reader reader, final OutputStream output, final Charset outputCharset)
+            throws IOException {
+        final OutputStreamWriter writer = new OutputStreamWriter (output, toCharset(outputCharset));
+        copy(reader, writer);
+        // XXX Unless anyone is planning on rewriting OutputStreamWriter,
+        // we have to flush here.
+        writer.flush();
+    }
+    
+    static Charset toCharset(final Charset charset) {
+        return charset == null ? Charset.defaultCharset() : charset;
+    }
+    
+    public static int copy(final Reader reader, final Writer writer) throws IOException {
+        final long count = copyLarge(reader, writer, SKIP_CHAR_BUFFER.get ());
+        if (count > Integer.MAX_VALUE) {
+            return -1;
+        }
+        return (int) count;
+    }
+    
+    public static long copyLarge(final Reader reader, final Writer writer, final char[] buffer) throws IOException {
+        long count = 0;
+        int n;
+        while (-1 != (n = reader.read(buffer))) {
+            writer.write(buffer, 0, n);
+            count += n;
+        }
+        return count;
+    }
+    
+    private static char [] charArray () {
+        return new char[8192];
+    }
+    
+    private static final ThreadLocal<char[]> SKIP_CHAR_BUFFER = ThreadLocal.withInitial(StringSearch::charArray);
+    private static final Logger LOG = Logger.instance ("StringSearch");
 }
diff --git a/lsp/java/src/main/java/com/itsaky/lsp/java/visitors/SemanticHighlighter.java b/lsp/java/src/main/java/com/itsaky/lsp/java/visitors/SemanticHighlighter.java
index 453ad417c..1c0a45685 100644
--- a/lsp/java/src/main/java/com/itsaky/lsp/java/visitors/SemanticHighlighter.java
+++ b/lsp/java/src/main/java/com/itsaky/lsp/java/visitors/SemanticHighlighter.java
@@ -17,6 +17,8 @@
 
 package com.itsaky.lsp.java.visitors;
 
+import static android.text.TextUtils.substring;
+
 import androidx.annotation.NonNull;
 
 import com.itsaky.androidide.utils.Logger;
@@ -171,8 +173,8 @@ public class SemanticHighlighter extends TreePathScanner<Void, List<HighlightTok
         }
         // Find name inside expression
         Path file = Paths.get(root.getSourceFile().toUri());
-        String contents = FileStore.contents(file);
-        String region = contents.substring(start, end);
+        CharSequence contents = FileStore.contents(file);
+        String region = substring(contents, start, end);
         start += region.indexOf(name.toString());
         end = start + name.length();
         return new Range (getPosition (start, root.getLineMap ()), getPosition (end, root.getLineMap ()));
diff --git a/lsp/xml/build.gradle b/lsp/xml/build.gradle
index 49b035a20..7f6cc22bd 100644
--- a/lsp/xml/build.gradle
+++ b/lsp/xml/build.gradle
@@ -46,8 +46,10 @@ dependencies {
 
     implementation project(':lsp:api')
 
+    compileOnly project(':editor')
     compileOnly project(':lexers')
     compileOnly project(':common')
     compileOnly project(':sdk-info')
+
     compileOnly common.antlr4
 }
\ No newline at end of file
diff --git a/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLFileStore.java b/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLFileStore.java
deleted file mode 100644
index a2d3e0c94..000000000
--- a/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLFileStore.java
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- *  This file is part of AndroidIDE.
- *
- *  AndroidIDE is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *
- *  AndroidIDE is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
- */
-package com.itsaky.lsp.xml;
-
-import androidx.annotation.NonNull;
-
-import com.itsaky.androidide.utils.Logger;
-import com.itsaky.lsp.models.DocumentChangeEvent;
-import com.itsaky.lsp.models.DocumentCloseEvent;
-import com.itsaky.lsp.models.DocumentOpenEvent;
-import com.itsaky.lsp.models.DocumentSaveEvent;
-
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.time.Instant;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
-/**
- * @author Akash Yadav
- */
-class XMLFileStore {
-    
-    private static final Set<Path> workspaceRoots = new HashSet<> ();
-    private static final Map<Path, VersionedContent> activeDocuments = new HashMap<> ();
-    
-    private static final Logger LOG = Logger.instance ("XMLFileStore");
-    
-    static void shutdown () {
-        activeDocuments.clear ();
-    }
-    
-    public static void open (@NonNull DocumentOpenEvent event) {
-        final var file = event.getOpenedFile ();
-        if (!isXMLFile (file)) {
-            LOG.error ("Opened file is not an XML file. Ignoring...");
-            return;
-        }
-        
-        activeDocuments.put (file, new VersionedContent (event.getText (), event.getVersion ()));
-    }
-    
-    public static void close (@NonNull DocumentCloseEvent event) {
-        final var file = event.getClosedFile ();
-        if (!isXMLFile (file)) {
-            LOG.error ("Closed file is not an XML file. Ignoring...");
-            return;
-        }
-        
-        activeDocuments.remove (file);
-    }
-    
-    @SuppressWarnings ("unused")
-    public static void save (DocumentSaveEvent event) {
-    
-    }
-    
-    public static void change (@NonNull DocumentChangeEvent event) {
-        final var file = event.getChangedFile ();
-        if (!isXMLFile (file)) {
-            LOG.error ("Changed file is not an XML file. Ignoring...");
-            return;
-        }
-        
-        activeDocuments.put (file, new VersionedContent (event.getNewText (), event.getVersion ()));
-    }
-    
-    public static Instant lastModified (final Path file) {
-        if (!isXMLFile (file)) {
-            return Instant.now ();
-        }
-    
-        final var document = activeDocuments.get (file);
-        if (document != null) {
-            return document.modified;
-        }
-        
-        return Instant.now ();
-    }
-    
-    public static boolean isXMLFile (Path file) {
-        return file != null && !Files.isDirectory (file) && file.getFileName ().toString ().endsWith (".xml");
-    }
-    
-    public static void setWorkspaceRoots (Set<Path> roots) {
-        workspaceRoots.clear ();
-        workspaceRoots.addAll (roots);
-    }
-    
-    static class VersionedContent {
-        final String contents;
-        final int version;
-        final Instant modified = Instant.now ();
-    
-        VersionedContent (String contents, int version) {
-            this.contents = contents;
-            this.version = version;
-        }
-    }
-}
\ No newline at end of file
diff --git a/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLLanguageServer.java b/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLLanguageServer.java
index c3430f994..45baeb9ea 100644
--- a/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLLanguageServer.java
+++ b/lsp/xml/src/main/java/com/itsaky/lsp/xml/XMLLanguageServer.java
@@ -20,7 +20,7 @@ package com.itsaky.lsp.xml;
 import androidx.annotation.NonNull;
 
 import com.itsaky.lsp.api.ICodeActionProvider;
-import com.itsaky.lsp.api.ICodeAnalyzer;
+import com.itsaky.lsp.api.IDiagnosticProvider;
 import com.itsaky.lsp.api.ICompletionProvider;
 import com.itsaky.lsp.api.IDefinitionProvider;
 import com.itsaky.lsp.api.IDocumentHandler;
@@ -33,7 +33,7 @@ import com.itsaky.lsp.api.ISignatureHelpProvider;
 import com.itsaky.lsp.models.InitializeParams;
 import com.itsaky.lsp.models.InitializeResult;
 import com.itsaky.lsp.util.NoCodeActionsProvider;
-import com.itsaky.lsp.util.NoCodeAnalyzer;
+import com.itsaky.lsp.util.NoDiagnosticProvider;
 import com.itsaky.lsp.util.NoCompletionsProvider;
 import com.itsaky.lsp.util.NoDefinitionProvider;
 import com.itsaky.lsp.util.NoDocumentHandler;
@@ -98,7 +98,6 @@ public class XMLLanguageServer implements ILanguageServer {
     
     @Override
     public void shutdown () {
-        XMLFileStore.shutdown ();
     }
     
     @Override
@@ -169,7 +168,7 @@ public class XMLLanguageServer implements ILanguageServer {
     
     @NonNull
     @Override
-    public ICodeAnalyzer getCodeAnalyzer () {
-        return new NoCodeAnalyzer ();
+    public IDiagnosticProvider getCodeAnalyzer () {
+        return new NoDiagnosticProvider ();
     }
 }
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
index 8efddb616..e4d171dd5 100755
--- a/settings.gradle
+++ b/settings.gradle
@@ -11,3 +11,4 @@ include ':gradle-plugin'
 include ':lsp:api'
 include ':lsp:java'
 include ':lsp:xml'
+include ':editor'