fix: show empty state hints for bottom sheet fragments (closes #1157, c…

…loses #1158)

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

@@ -29,7 +29,7 @@
 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 EditorBottomSheetTabAdapter(@NonNull FragmentActivity fragmentActivity) {
     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 String getTitle(int position) {
   }
 
   @Nullable
-  public SimpleOutputFragment getBuildOutputFragment() {
-    return findFragmentByClass(SimpleOutputFragment.class);
+  public BuildOutputFragment getBuildOutputFragment() {
+    return findFragmentByClass(BuildOutputFragment.class);
   }
 
   @Nullable

app/src/main/java/com/itsaky/androidide/fragments/SimpleOutputFragment.kt → 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.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)
+  }
 }