fix: show empty state hints for bottom sheet fragments (closes #1157, closes #1158)

app/src/main/java/com/itsaky/androidide/adapters/EditorBottomSheetTabAdapter.java

@@ -29,7 +29,7 @@ import com.itsaky.androidide.fragments.AppLogFragment;
 import com.itsaky.androidide.fragments.DiagnosticsListFragment;
 import com.itsaky.androidide.fragments.IDELogFragment;
 import com.itsaky.androidide.fragments.SearchResultFragment;
-import com.itsaky.androidide.fragments.SimpleOutputFragment;
+import com.itsaky.androidide.fragments.BuildOutputFragment;
 import com.itsaky.androidide.utils.ILogger;
 
 import java.util.ArrayList;
@@ -48,7 +48,7 @@ public class EditorBottomSheetTabAdapter extends FragmentStateAdapter {
     this.fragments.add(
         new Tab(
             fragmentActivity.getString(R.string.build_output),
-            SimpleOutputFragment.class,
+            BuildOutputFragment.class,
             ++index));
     this.fragments.add(
         new Tab(fragmentActivity.getString(R.string.app_logs), AppLogFragment.class, ++index));
@@ -117,8 +117,8 @@ public class EditorBottomSheetTabAdapter extends FragmentStateAdapter {
   }
 
   @Nullable
-  public SimpleOutputFragment getBuildOutputFragment() {
-    return findFragmentByClass(SimpleOutputFragment.class);
+  public BuildOutputFragment getBuildOutputFragment() {
+    return findFragmentByClass(BuildOutputFragment.class);
   }
 
   @Nullable

app/src/main/java/com/itsaky/androidide/fragments/BuildOutputFragment.kt

@@ -19,11 +19,13 @@ package com.itsaky.androidide.fragments
 import android.os.Bundle
 import android.view.View
 import com.blankj.utilcode.util.ThreadUtils
+import com.itsaky.androidide.R
 
-class SimpleOutputFragment : NonEditableEditorFragment() {
+class BuildOutputFragment : NonEditableEditorFragment() {
   private val unsavedLines: MutableList<String?> = ArrayList()
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     super.onViewCreated(view, savedInstanceState)
+    emptyStateViewModel.emptyMessage.value = getString(R.string.msg_emptyview_buildoutput)
     if (unsavedLines.isNotEmpty()) {
       for (line in unsavedLines) {
         editor?.append("${line!!.trim()}\n")
@@ -48,7 +50,9 @@ class SimpleOutputFragment : NonEditableEditorFragment() {
       } else {
         "${output}\n"
       }
-      editor!!.append(message)
+      editor!!.append(message).also {
+        emptyStateViewModel.isEmpty.value = false
+      }
     }
   }
 }

app/src/main/java/com/itsaky/androidide/fragments/DiagnosticsListFragment.java

@@ -1,95 +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.fragments;
-
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.LinearLayout;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
-import com.itsaky.androidide.adapters.DiagnosticsAdapter;
-import com.itsaky.androidide.ui.EmptyView;
-
-import java.util.ArrayList;
-
-public class DiagnosticsListFragment extends Fragment {
-
-  private RecyclerView list;
-  private EmptyView emptyView;
-
-  private DiagnosticsAdapter unsavedAdapter;
-
-  @Nullable
-  @Override
-  public View onCreateView(
-      @NonNull LayoutInflater inflater,
-      @Nullable ViewGroup parent,
-      @Nullable Bundle savedInstanceState) {
-    final var container = new LinearLayout(inflater.getContext());
-    container.setOrientation(LinearLayout.VERTICAL);
-    container.setLayoutParams(new ViewGroup.LayoutParams(-1, -1));
-
-    this.list = new RecyclerView(inflater.getContext());
-    this.emptyView = new EmptyView(inflater.getContext());
-
-    container.addView(list, new LinearLayout.LayoutParams(-1, -1));
-    container.addView(emptyView, new LinearLayout.LayoutParams(-1, -1));
-
-    return container;
-  }
-
-  @Override
-  public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
-    super.onViewCreated(view, savedInstanceState);
-
-    list.setLayoutManager(new LinearLayoutManager(list.getContext()));
-    list.setAdapter(
-        unsavedAdapter != null ? unsavedAdapter : new DiagnosticsAdapter(new ArrayList<>(), null));
-    unsavedAdapter = null;
-  }
-
-  @Override
-  public void onDestroyView() {
-    super.onDestroyView();
-    unsavedAdapter = null;
-    list = null;
-    emptyView = null;
-  }
-
-  public void setAdapter(@NonNull DiagnosticsAdapter adapter) {
-    if (list != null) {
-      list.setAdapter(adapter);
-    } else {
-      unsavedAdapter = adapter;
-    }
-  }
-
-  public void handleResultVisibility(boolean error) {
-    if (emptyView != null && list != null) {
-      emptyView.setVisibility(error ? View.VISIBLE : View.GONE);
-      list.setVisibility(error ? View.GONE : View.VISIBLE);
-    }
-  }
-}

app/src/main/java/com/itsaky/androidide/fragments/DiagnosticsListFragment.kt

@@ -0,0 +1,35 @@
+/*
+ *  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.fragments
+
+import android.os.Bundle
+import android.view.View
+import androidx.recyclerview.widget.RecyclerView
+import com.itsaky.androidide.R
+import com.itsaky.androidide.adapters.DiagnosticsAdapter
+
+class DiagnosticsListFragment : RecyclerViewFragment<DiagnosticsAdapter>() {
+
+  override fun onCreateAdapter(): RecyclerView.Adapter<*> {
+    return DiagnosticsAdapter(ArrayList(), null)
+  }
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+    emptyStateViewModel.emptyMessage.value = getString(R.string.msg_emptyview_diagnostics)
+  }
+}

app/src/main/java/com/itsaky/androidide/fragments/EmptyStateFragment.kt

@@ -0,0 +1,79 @@
+/*
+ *  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.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.viewModels
+import androidx.viewbinding.ViewBinding
+import com.itsaky.androidide.databinding.FragmentEmptyStateBinding
+import com.itsaky.androidide.viewmodel.EmptyStateFragmentViewModel
+
+/**
+ * A fragment that shows a message when there is no data to show in the subclass fragment.
+ *
+ * @author Akash Yadav
+ */
+abstract class EmptyStateFragment<T : ViewBinding>(layout: Int,
+  bind: (View) -> T) : FragmentWithBinding<T>(layout, bind) {
+
+  protected var emptyStateBinding: FragmentEmptyStateBinding? = null
+    private set
+
+  protected val emptyStateViewModel by viewModels<EmptyStateFragmentViewModel>()
+
+  internal var isEmpty: Boolean
+    get() = emptyStateViewModel.isEmpty.value ?: false
+    set(value) {
+      emptyStateViewModel.isEmpty.value = value
+    }
+
+  override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
+    savedInstanceState: Bundle?): View {
+
+    return FragmentEmptyStateBinding.inflate(inflater, container, false).also { emptyStateBinding ->
+      this.emptyStateBinding = emptyStateBinding
+
+      // add the main fragment view
+      emptyStateBinding.root.addView(
+        super.onCreateView(inflater, emptyStateBinding.root, savedInstanceState)
+      )
+    }.root
+  }
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+
+    emptyStateViewModel.isEmpty.observe(viewLifecycleOwner) { isEmpty ->
+      emptyStateBinding?.apply {
+        root.displayedChild = if (isEmpty) 0 else 1
+      }
+    }
+
+    emptyStateViewModel.emptyMessage.observe(viewLifecycleOwner) { message ->
+      emptyStateBinding?.emptyView?.message = message
+    }
+  }
+
+  override fun onDestroyView() {
+    this.emptyStateBinding = null
+    super.onDestroyView()
+  }
+}

app/src/main/java/com/itsaky/androidide/fragments/LogFragments.kt

@@ -17,6 +17,9 @@
 
 package com.itsaky.androidide.fragments
 
+import android.os.Bundle
+import android.view.View
+import com.itsaky.androidide.R
 import com.itsaky.androidide.utils.ILogger
 
 /**
@@ -43,6 +46,11 @@ class IDELogFragment : LogViewFragment() {
   override fun isSimpleFormattingEnabled() = true
   override fun getFilename() = "ide_logs"
 
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+    emptyStateViewModel.emptyMessage.value = getString(R.string.msg_emptyview_idelogs)
+  }
+
   override fun onDestroy() {
     super.onDestroy()
     ILogger.removeLogListener(logListener)
@@ -57,4 +65,9 @@ class IDELogFragment : LogViewFragment() {
 class AppLogFragment : LogViewFragment() {
   override fun isSimpleFormattingEnabled() = false
   override fun getFilename() = "app_logs"
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+    emptyStateViewModel.emptyMessage.value = getString(R.string.msg_emptyview_applogs)
+  }
 }

app/src/main/java/com/itsaky/androidide/fragments/LogViewFragment.kt

@@ -20,11 +20,9 @@ package com.itsaky.androidide.fragments
 import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
-import android.view.LayoutInflater
 import android.view.View
-import android.view.ViewGroup
-import androidx.fragment.app.Fragment
 import com.blankj.utilcode.util.ThreadUtils
+import com.itsaky.androidide.R
 import com.itsaky.androidide.databinding.FragmentLogBinding
 import com.itsaky.androidide.editor.language.log.LogLanguage
 import com.itsaky.androidide.editor.schemes.IDEColorSchemeProvider
@@ -44,7 +42,9 @@ import kotlin.math.min
  *
  * @author Akash Yadav
  */
-abstract class LogViewFragment : Fragment(), ShareableOutputFragment {
+abstract class LogViewFragment :
+  EmptyStateFragment<FragmentLogBinding>(R.layout.fragment_log, FragmentLogBinding::bind),
+  ShareableOutputFragment {
 
   companion object {
 
@@ -78,8 +78,6 @@ abstract class LogViewFragment : Fragment(), ShareableOutputFragment {
     const val MAX_LINE_COUNT = TRIM_ON_LINE_COUNT - 300
   }
 
-  var binding: FragmentLogBinding? = null
-
   private var lastLog = -1L
 
   private val cacheLock = ReentrantLock()
@@ -161,7 +159,13 @@ abstract class LogViewFragment : Fragment(), ShareableOutputFragment {
   }
 
   private fun append(chars: CharSequence?) {
-    chars?.let { ThreadUtils.runOnUiThread { binding?.editor?.append(chars) } }
+    chars?.let {
+      ThreadUtils.runOnUiThread {
+        _binding?.editor?.append(chars)?.also {
+          emptyStateViewModel.isEmpty.value = false
+        }
+      }
+    }
   }
 
   private fun trimLinesAtStart() {
@@ -171,7 +175,7 @@ abstract class LogViewFragment : Fragment(), ShareableOutputFragment {
     }
 
     ThreadUtils.runOnUiThread {
-      binding?.editor?.text?.apply {
+      _binding?.editor?.text?.apply {
         if (lineCount <= TRIM_ON_LINE_COUNT) {
           isTrimming.set(false)
           return@apply
@@ -193,18 +197,9 @@ abstract class LogViewFragment : Fragment(), ShareableOutputFragment {
     appendLog(line)
   }
 
-  override fun onCreateView(
-    inflater: LayoutInflater,
-    container: ViewGroup?,
-    savedInstanceState: Bundle?,
-  ): View {
-    binding = FragmentLogBinding.inflate(inflater, container, false)
-    return binding!!.root
-  }
-
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     super.onViewCreated(view, savedInstanceState)
-    val editor = this.binding!!.editor
+    val editor = this.binding.editor
     editor.props.autoIndent = false
     editor.isEditable = false
     editor.dividerWidth = 0f
@@ -246,24 +241,17 @@ abstract class LogViewFragment : Fragment(), ShareableOutputFragment {
   }
 
   override fun onDestroyView() {
-    binding?.editor?.release()
+    _binding?.editor?.release()
     super.onDestroyView()
   }
 
-  override fun onDestroy() {
-    super.onDestroy()
-    this.binding = null
-  }
-
   override fun getContent(): String {
-    if (this.binding == null) {
-      return ""
-    }
-
-    return this.binding!!.editor.text.toString()
+    return this._binding?.editor?.text?.toString() ?: ""
   }
 
   override fun clearOutput() {
-    binding?.editor?.setText("")
+    _binding?.editor?.setText("")?.also {
+      emptyStateViewModel.isEmpty.value = true
+    }
   }
 }

app/src/main/java/com/itsaky/androidide/fragments/NonEditableEditorFragment.java

@@ -18,40 +18,29 @@
 package com.itsaky.androidide.fragments;
 
 import android.os.Bundle;
-import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
-
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
-
+import com.itsaky.androidide.R;
 import com.itsaky.androidide.databinding.FragmentNonEditableEditorBinding;
+import com.itsaky.androidide.editor.ui.IDEEditor;
 import com.itsaky.androidide.syntax.colorschemes.SchemeAndroidIDE;
 import com.itsaky.androidide.utils.TypefaceUtilsKt;
-import com.itsaky.androidide.editor.ui.IDEEditor;
-
 import io.github.rosemoe.sora.lang.EmptyLanguage;
 
-public abstract class NonEditableEditorFragment extends Fragment
+public abstract class NonEditableEditorFragment extends
+    EmptyStateFragment<FragmentNonEditableEditorBinding>
     implements ShareableOutputFragment {
-  
-  private FragmentNonEditableEditorBinding binding;
 
-  @Nullable
-  @Override
-  public View onCreateView(
-      @NonNull LayoutInflater inflater,
-      @Nullable ViewGroup container,
-      @Nullable Bundle savedInstanceState) {
-    this.binding = FragmentNonEditableEditorBinding.inflate(inflater, container, false);
-    return binding.getRoot();
+  public NonEditableEditorFragment() {
+    super(R.layout.fragment_non_editable_editor, FragmentNonEditableEditorBinding::bind);
   }
 
   @Override
   public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
     super.onViewCreated(view, savedInstanceState);
-    final var editor = binding.getRoot();
+    getEmptyStateViewModel().getEmptyMessage().setValue(createEmptyStateMessage());
+    final var editor = getBinding().getRoot();
     editor.setEditable(false);
     editor.setDividerWidth(0);
     editor.setEditorLanguage(new EmptyLanguage());
@@ -63,10 +52,8 @@ public abstract class NonEditableEditorFragment extends Fragment
     editor.setColorScheme(SchemeAndroidIDE.newInstance(requireContext()));
   }
 
-  @Override
-  public void onDestroyView() {
-    super.onDestroyView();
-    binding = null;
+  private CharSequence createEmptyStateMessage() {
+    return null;
   }
 
   @NonNull
@@ -82,6 +69,7 @@ public abstract class NonEditableEditorFragment extends Fragment
 
   @Nullable
   public IDEEditor getEditor() {
+    final var binding = get_binding();
     if (binding == null) {
       return null;
     }
@@ -103,5 +91,6 @@ public abstract class NonEditableEditorFragment extends Fragment
 
     // Editing CodeEditor's content is a synchronized operation
     editor.getText().delete(0, editor.getText().length());
+    getEmptyStateViewModel().isEmpty().setValue(true);
   }
 }

app/src/main/java/com/itsaky/androidide/fragments/RecyclerViewFragment.kt

@@ -0,0 +1,81 @@
+/*
+ *  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.fragments
+
+import android.os.Bundle
+import android.view.View
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.LayoutManager
+import com.itsaky.androidide.R
+import com.itsaky.androidide.databinding.FragmentRecyclerviewBinding
+
+/**
+ * A fragment which shows a [RecyclerView].
+ *
+ * @author Akash Yadav
+ */
+abstract class RecyclerViewFragment<A : RecyclerView.Adapter<*>> :
+  EmptyStateFragment<FragmentRecyclerviewBinding>(R.layout.fragment_recyclerview,
+    FragmentRecyclerviewBinding::bind) {
+
+  private var unsavedAdapter: A? = null
+
+  /**
+   * Creates the adapter for the [RecyclerView].
+   */
+  protected abstract fun onCreateAdapter(): RecyclerView.Adapter<*>
+
+  /**
+   * Creates the layout manager for the [RecyclerView].
+   */
+  protected open fun onCreateLayoutManager(): LayoutManager {
+    return LinearLayoutManager(requireContext())
+  }
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+    binding.root.apply {
+      layoutManager = onCreateLayoutManager()
+      adapter = unsavedAdapter ?: onCreateAdapter()
+    }
+
+    unsavedAdapter = null
+
+    checkIsEmpty()
+  }
+
+  override fun onDestroyView() {
+    super.onDestroyView()
+    unsavedAdapter = null
+  }
+
+  /**
+   * Set the adapter for the [RecyclerView].
+   */
+  fun setAdapter(adapter: A) {
+    _binding?.root?.let { list -> list.adapter = adapter } ?: run { unsavedAdapter = adapter }
+    checkIsEmpty()
+  }
+
+  private fun checkIsEmpty() {
+    if (_binding?.root?.adapter?.itemCount == 0) {
+      emptyStateViewModel.isEmpty.value = true
+    }
+  }
+}

app/src/main/java/com/itsaky/androidide/fragments/SearchResultFragment.java

@@ -1,103 +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.fragments;
-
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.LinearLayout;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
-import com.itsaky.androidide.adapters.SearchListAdapter;
-import com.itsaky.androidide.ui.EmptyView;
-
-import java.util.Collections;
-
-import kotlin.Unit;
-
-public class SearchResultFragment extends Fragment {
-
-  private RecyclerView list;
-  private EmptyView emptyView;
-
-  private SearchListAdapter unsavedAdapter;
-
-  @Nullable
-  @Override
-  public View onCreateView(
-      @NonNull LayoutInflater inflater,
-      @Nullable ViewGroup parent,
-      @Nullable Bundle savedInstanceState) {
-    final var container = new LinearLayout(inflater.getContext());
-    container.setOrientation(LinearLayout.VERTICAL);
-    container.setLayoutParams(new ViewGroup.LayoutParams(-1, -1));
-
-    this.list = new RecyclerView(inflater.getContext());
-    this.emptyView = new EmptyView(inflater.getContext());
-
-    container.addView(list, new LinearLayout.LayoutParams(-1, -1));
-    container.addView(emptyView, new LinearLayout.LayoutParams(-1, -1));
-
-    return container;
-  }
-
-  @Override
-  public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
-    super.onViewCreated(view, savedInstanceState);
-
-    list.setLayoutManager(new LinearLayoutManager(list.getContext()));
-    list.setAdapter(
-        unsavedAdapter != null
-            ? unsavedAdapter
-            : new SearchListAdapter(Collections.emptyMap(), this::noOp, this::noOp));
-    unsavedAdapter = null;
-  }
-
-  @Override
-  public void onDestroyView() {
-    super.onDestroyView();
-    unsavedAdapter = null;
-    list = null;
-    emptyView = null;
-  }
-
-  public void setAdapter(@NonNull final SearchListAdapter adapter) {
-    if (list == null) {
-      unsavedAdapter = adapter;
-      return;
-    }
-    this.list.setAdapter(adapter);
-  }
-
-  public void handleResultVisibility(boolean error) {
-    if (emptyView != null && list != null) {
-      emptyView.setVisibility(error ? View.VISIBLE : View.GONE);
-      list.setVisibility(error ? View.GONE : View.VISIBLE);
-    }
-  }
-
-  private Unit noOp(Object obj) {
-    return Unit.INSTANCE;
-  }
-}

app/src/main/java/com/itsaky/androidide/fragments/SearchResultFragment.kt

@@ -0,0 +1,28 @@
+/*
+ *  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.fragments
+
+import androidx.recyclerview.widget.RecyclerView
+import com.itsaky.androidide.adapters.SearchListAdapter
+
+class SearchResultFragment : RecyclerViewFragment<SearchListAdapter>() {
+
+  override fun onCreateAdapter(): RecyclerView.Adapter<*> {
+    val noOp: (Any) -> Unit = {}
+    return SearchListAdapter(emptyMap(), noOp, noOp)
+  }
+}

app/src/main/java/com/itsaky/androidide/ui/EditorBottomSheet.kt

@@ -86,13 +86,15 @@ constructor(
     localContext.resources.getDimension(R.dimen.editor_sheet_collapsed_height)
   }
 
-  @JvmField var binding: LayoutEditorBottomSheetBinding
+  @JvmField
+  var binding: LayoutEditorBottomSheetBinding
 
   val pagerAdapter: EditorBottomSheetTabAdapter
 
   private val log = ILogger.newInstance("EditorBottomSheet")
 
   companion object {
+
     const val CHILD_SYMBOL_INPUT = 0
     const val CHILD_HEADER = 1
     const val CHILD_ACTION = 2
@@ -138,7 +140,8 @@ constructor(
       val filename = fragment.getFilename()
 
       @Suppress("DEPRECATION")
-      val progress = android.app.ProgressDialog.show(context, null, context.getString(string.please_wait))
+      val progress = android.app.ProgressDialog.show(context, null,
+        context.getString(string.please_wait))
       executeAsync(fragment::getContent) {
         progress.dismiss()
         shareText(it, filename)
@@ -234,11 +237,11 @@ constructor(
   }
 
   fun handleDiagnosticsResultVisibility(errorVisible: Boolean) {
-    runOnUiThread { pagerAdapter.diagnosticsFragment?.handleResultVisibility(errorVisible) }
+    runOnUiThread { pagerAdapter.diagnosticsFragment?.isEmpty = errorVisible }
   }
 
   fun handleSearchResultVisibility(errorVisible: Boolean) {
-    runOnUiThread { pagerAdapter.searchResultFragment?.handleResultVisibility(errorVisible) }
+    runOnUiThread { pagerAdapter.searchResultFragment?.isEmpty = errorVisible }
   }
 
   fun setDiagnosticsAdapter(adapter: DiagnosticsAdapter) {
@@ -300,7 +303,8 @@ constructor(
       flashError(context.getString(string.msg_output_text_extraction_failed))
       return
     }
-    val pd = android.app.ProgressDialog.show(context, null, context.getString(string.please_wait), true, false)
+    val pd = android.app.ProgressDialog.show(context, null, context.getString(string.please_wait),
+      true, false)
     executeAsyncProvideError(
       Callable { writeTempFile(text, type) },
       CallbackWithError<File> { result: File?, error: Throwable? ->

app/src/main/java/com/itsaky/androidide/ui/EmptyView.java

@@ -21,16 +21,22 @@
 package com.itsaky.androidide.ui;
 
 import android.content.Context;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.TypedValue;
+import android.view.View;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
-
+import androidx.annotation.NonNull;
 import com.itsaky.androidide.R;
 import com.itsaky.androidide.utils.ResourceUtilsKt;
 
 public class EmptyView extends RelativeLayout {
 
+  private static final int MESSAGE_TEXTVIEW = View.generateViewId();
+
+  private CharSequence message = null;
+
   public EmptyView(Context context) {
     this(context, null);
   }
@@ -54,7 +60,8 @@ public class EmptyView extends RelativeLayout {
     removeAllViews();
 
     TextView text = new TextView(getContext());
-    text.setText(com.itsaky.androidide.resources.R.string.msg_empty_view);
+    text.setId(MESSAGE_TEXTVIEW);
+    text.setText(getMessage());
     text.setTextColor(ResourceUtilsKt.resolveAttr(getContext(), R.attr.colorSecondaryVariant));
     text.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
 
@@ -63,4 +70,18 @@ public class EmptyView extends RelativeLayout {
 
     addView(text, params);
   }
+
+  public void setMessage(CharSequence message) {
+    this.message = message;
+
+    final TextView text = findViewById(MESSAGE_TEXTVIEW);
+    if (text != null) {
+      text.setText(getMessage());
+    }
+  }
+
+  @NonNull
+  public CharSequence getMessage() {
+    return TextUtils.isEmpty(message) ? getContext().getString(R.string.msg_empty_view) : message;
+  }
 }

app/src/main/java/com/itsaky/androidide/viewmodel/EmptyStateFragmentViewModel.kt

@@ -0,0 +1,31 @@
+/*
+ *  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.viewmodel
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import com.itsaky.androidide.R
+
+/**
+ * @author Akash Yadav
+ */
+class EmptyStateFragmentViewModel : ViewModel() {
+
+  val isEmpty = MutableLiveData(true)
+  val emptyMessage = MutableLiveData<CharSequence>("")
+}

app/src/main/res/layout/fragment_empty_state.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~  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/>.
+  -->
+
+<ViewFlipper xmlns:android="http://schemas.android.com/apk/res/android"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent">
+
+  <com.itsaky.androidide.ui.EmptyView
+    android:id="@+id/empty_view"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"/>
+
+</ViewFlipper>

app/src/main/res/layout/fragment_recyclerview.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~  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/>.
+  -->
+
+<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent" />

common/src/main/java/com/itsaky/androidide/fragments/FragmentWithBinding.kt

@@ -30,7 +30,7 @@ import androidx.viewbinding.ViewBinding
  * @author Akash Yadav
  */
 abstract class FragmentWithBinding<T : ViewBinding>(@LayoutRes layout: Int,
-                                                    private val bind: (View) -> T
+  private val bind: (View) -> T
 ) : BaseFragment(layout) {
 
   @Suppress("PropertyName")
@@ -41,10 +41,14 @@ abstract class FragmentWithBinding<T : ViewBinding>(@LayoutRes layout: Int,
       _binding) { "Cannot access ViewBinding. Fragment may have been destroyed." }
 
   override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
-                            savedInstanceState: Bundle?
+    savedInstanceState: Bundle?
   ): View {
     return super.onCreateView(inflater, container, savedInstanceState)!!
-      .also { _binding = bind(it) }
+      .also(this::doBind)
+  }
+
+  protected fun doBind(it: View) {
+    _binding = bind(it)
   }
 
   override fun onDestroyView() {

resources/src/main/res/values/strings.xml

@@ -23,7 +23,7 @@
   <string name="ide_preferences">IDE preferences</string>
   <string name="discussions_on_telegram">Discussions on Telegram</string>
   <string name="official_tg_channel">Official Telegram Channel</string>
-  <string name="msg_empty_view">I have nothing to show you…</string>
+  <string name="msg_empty_view">No data</string>
   <string name="title_terminal">Terminal</string>
   <string name="reset">Reset</string>
   <string name="app_logs">App Logs</string>
@@ -586,4 +586,8 @@
   <string name="idepref_group_debugging">Debugging</string>
   <string name="idepref_devOptions_dumpLogs_title">Dump logs</string>
   <string name="idepref_devOptions_dumpLogs_summary">Dump AndroidIDE logs to $HOME/.androidide/logs</string>
+  <string name="msg_emptyview_applogs">Run the debug variant of your application to view its logs here.</string>
+  <string name="msg_emptyview_idelogs">Logs from the IDE are shown here.</string>
+  <string name="msg_emptyview_diagnostics">Open a file to show its diagnostic results</string>
+  <string name="msg_emptyview_buildoutput">"Build the application or run a task to see its build output here. "</string>
 </resources>