fix(sidebar): add title for sidebar fragments

app/src/main/java/com/itsaky/androidide/fragments/sidebar/BulidVariantsFragment.kt

@@ -0,0 +1,29 @@
+/*
+ *  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.sidebar
+
+import com.itsaky.androidide.fragments.EmptyStateFragment
+import com.itsaky.androidide.fragments.RecyclerViewFragment
+
+/**
+ * A fragment to show the list of modules and the selected build variants in the
+ *
+ * @author Akash Yadav
+ */
+class BulidVariantsFragment  {
+}

app/src/main/java/com/itsaky/androidide/utils/EditorSidebarActions.kt

@@ -18,6 +18,10 @@
 package com.itsaky.androidide.utils
 
 import android.content.Context
+import android.os.Bundle
+import androidx.annotation.IdRes
+import androidx.core.view.forEach
+import androidx.navigation.NavController
 import androidx.navigation.NavDestination
 import androidx.navigation.NavDestination.Companion.hierarchy
 import androidx.navigation.NavGraph.Companion.findStartDestination
@@ -27,7 +31,6 @@ import androidx.navigation.fragment.FragmentNavigatorDestinationBuilder
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.get
 import androidx.navigation.navOptions
-import androidx.navigation.ui.setupWithNavController
 import com.google.android.material.shape.CornerFamily
 import com.google.android.material.shape.MaterialShapeDrawable
 import com.google.android.material.shape.ShapeAppearanceModel
@@ -42,6 +45,7 @@ import com.itsaky.androidide.actions.sidebar.FileTreeSidebarAction
 import com.itsaky.androidide.actions.sidebar.PreferencesSidebarAction
 import com.itsaky.androidide.actions.sidebar.TerminalSidebarAction
 import com.itsaky.androidide.fragments.sidebar.EditorSidebarFragment
+import java.lang.ref.WeakReference
 
 
 /**
@@ -144,10 +148,35 @@ internal object EditorSidebarActions {
       }
     }
 
-    rail.setupWithNavController(controller)
+    val railRef = WeakReference(rail)
+    val titleRef = WeakReference(binding.title)
+    controller.addOnDestinationChangedListener(
+      object : NavController.OnDestinationChangedListener {
+        override fun onDestinationChanged(
+          controller: NavController,
+          destination: NavDestination,
+          arguments: Bundle?
+        ) {
+          val railView = railRef.get()
+          if (railView == null) {
+            controller.removeOnDestinationChangedListener(this)
+            return
+          }
 
-    // make sure the 'Home' item is checked by default
-    rail.menu.findItem(FileTreeSidebarAction.ID.hashCode())?.isChecked = true
+          railView.menu.forEach { item ->
+            if (destination.matchDestination(item.itemId)) {
+              item.isChecked = true
+              titleRef.get()?.text = item.title
+            }
+          }
+        }
+      })
+
+    // make sure the 'File tree' item is checked by default
+    rail.menu.findItem(FileTreeSidebarAction.ID.hashCode())?.also {
+      it.isChecked = true
+      binding.title.text = it.title
+    }
   }
 
   /**
@@ -159,6 +188,15 @@ internal object EditorSidebarActions {
   internal fun NavDestination.matchDestination(route: String): Boolean =
     hierarchy.any { it.route == route }
 
+  /**
+   * Determines whether the given `destId` matches the NavDestination. This handles
+   * both the default case (the destination's id matches the given id) and the nested case where
+   * the given id is a parent/grandparent/etc of the destination.
+   */
+  @JvmStatic
+  internal fun NavDestination.matchDestination(@IdRes destId: Int): Boolean =
+    hierarchy.any { it.id == destId }
+
   @JvmStatic
   internal fun ShapeAppearanceModel.roundedOnRight(cornerSize: Float = 28f): ShapeAppearanceModel {
     return toBuilder().run {

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

@@ -17,6 +17,7 @@
 
 <androidx.constraintlayout.widget.ConstraintLayout 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_width="match_parent"
   android:layout_height="match_parent"
   android:background="?attr/colorSurfaceContainer">
@@ -30,7 +31,7 @@
     app:layout_constraintBottom_toBottomOf="parent"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintStart_toEndOf="@id/navigation"
-    app:layout_constraintTop_toTopOf="parent" />
+    app:layout_constraintTop_toBottomOf="@id/title" />
 
   <com.google.android.material.navigationrail.NavigationRailView
     android:id="@+id/navigation"
@@ -43,4 +44,21 @@
     app:layout_constraintTop_toTopOf="parent"
     app:menuGravity="bottom" />
 
+  <com.google.android.material.textview.MaterialTextView
+    android:id="@+id/title"
+    android:layout_width="0dp"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="16dp"
+    android:layout_marginBottom="8dp"
+    android:layout_marginStart="16dp"
+    android:layout_marginEnd="16dp"
+    android:ellipsize="end"
+    android:maxLines="1"
+    android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
+    app:layout_constraintBottom_toTopOf="@id/fragment_container"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toEndOf="@id/navigation"
+    app:layout_constraintTop_toTopOf="parent"
+    tools:text="File tree" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
-  android:padding="16dp">
+  android:paddingBottom="16dp"
+  android:paddingStart="16dp"
+  android:paddingEnd="16dp">
 
   <HorizontalScrollView
     android:id="@+id/horizontal_croll"