Added actions for finding definition and references to elements in Java source code

lsp/java/src/main/java/com/itsaky/lsp/java/actions/FindReferencesAction.kt

@@ -0,0 +1,62 @@
+/*
+ *  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.java.actions
+
+import com.itsaky.androidide.actions.ActionData
+import com.itsaky.androidide.utils.Logger
+import com.itsaky.lsp.java.R
+import io.github.rosemoe.sora.widget.CodeEditor
+import java.io.File
+
+/**
+ * Action that allows the user to find references to a variable, field, method or class.
+ *
+ * @author Akash Yadav
+ */
+class FindReferencesAction : BaseCodeAction() {
+    override val titleTextRes: Int = R.string.action_find_references
+    override val id: String = "lsp_java_findReferences"
+    override var label: String = "Find references"
+    override var requiresUIThread: Boolean = true
+    private val log = Logger.newInstance(javaClass.simpleName)
+
+    override fun prepare(data: ActionData) {
+        super.prepare(data)
+
+        if (!visible || !hasRequiredData(data, CodeEditor::class.java, File::class.java)) {
+            markInvisible()
+            return
+        }
+    }
+
+    override fun execAction(data: ActionData): Any {
+        val editor = data[CodeEditor::class.java]!!
+        return tryExecFindDefinition(editor)
+    }
+
+    private fun tryExecFindDefinition(editor: CodeEditor): Boolean {
+        return try {
+            val method = editor::class.java.getDeclaredMethod("findReferences")
+            method.isAccessible = true
+            method.invoke(editor)
+            true
+        } catch (error: Throwable) {
+            false
+        }
+    }
+}

lsp/java/src/main/java/com/itsaky/lsp/java/actions/GoToDefinitionAction.kt

@@ -0,0 +1,63 @@
+/*
+ *  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.java.actions
+
+import com.itsaky.androidide.actions.ActionData
+import com.itsaky.androidide.utils.Logger
+import com.itsaky.lsp.java.R
+import io.github.rosemoe.sora.widget.CodeEditor
+import java.io.File
+
+/**
+ * Action that allows the user to navigate to the definition of a variable, field, method, class,
+ * etc.
+ *
+ * @author Akash Yadav
+ */
+class GoToDefinitionAction : BaseCodeAction() {
+    override val titleTextRes: Int = R.string.action_goto_definition
+    override val id: String = "lsp_java_gotoDefinition"
+    override var label: String = "Go to definition"
+    override var requiresUIThread: Boolean = true
+    private val log = Logger.newInstance(javaClass.simpleName)
+
+    override fun prepare(data: ActionData) {
+        super.prepare(data)
+
+        if (!visible || !hasRequiredData(data, CodeEditor::class.java, File::class.java)) {
+            markInvisible()
+            return
+        }
+    }
+
+    override fun execAction(data: ActionData): Any {
+        val editor = data[CodeEditor::class.java]!!
+        return tryExecFindDefinition(editor)
+    }
+
+    private fun tryExecFindDefinition(editor: CodeEditor): Boolean {
+        return try {
+            val method = editor::class.java.getDeclaredMethod("findDefinition")
+            method.isAccessible = true
+            method.invoke(editor)
+            true
+        } catch (error: Throwable) {
+            false
+        }
+    }
+}

lsp/java/src/main/java/com/itsaky/lsp/java/actions/JavaCodeActionsMenu.kt

@@ -24,6 +24,8 @@ class JavaCodeActionsMenu : CodeActionsMenu() {
     init {
         addAction(CommentAction())
         addAction(UncommentAction())
+        addAction(GoToDefinitionAction())
+        addAction(FindReferencesAction())
         addAction(AddImportAction())
         addAction(ImplementAbstractMethodsAction())
         addAction(VariableToStatementAction())

lsp/java/src/main/res/values/strings.xml

@@ -39,4 +39,6 @@
     <string name="msg_cannot_generate_setters_getters">Unable to generate setters and getters</string>
     <string name="msg_select_methods">Select methods to override</string>
     <string name="msg_no_overridable_methods">Unable to find any overridable method</string>
+    <string name="action_goto_definition">Go to definition</string>
+    <string name="action_find_references">Find references</string>
 </resources>