Fixed: TreeView cannot be scrolled horizontally to the left (#340)

app/src/main/java/com/itsaky/androidide/views/InterceptableDrawerLayout.kt

@@ -0,0 +1,82 @@
+/*
+ *  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.graphics.Rect
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.view.View
+import android.view.ViewGroup
+import androidx.drawerlayout.widget.DrawerLayout
+
+/**
+ * A [DrawerLayout] which allows intercepting the touch events by its children.
+ *
+ * @author Akash Yadav
+ */
+class InterceptableDrawerLayout : DrawerLayout {
+  private val rect: Rect = Rect()
+
+  constructor(context: Context) : super(context)
+  constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)
+  constructor(
+    context: Context,
+    attrs: AttributeSet?,
+    defStyleAttr: Int,
+  ) : super(context, attrs, defStyleAttr)
+
+  override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
+    val child = findScrollingChild(this, event.x, event.y)
+    return if (child != null) {
+      false
+    } else super.onInterceptTouchEvent(event)
+  }
+  
+  private fun findScrollingChild(parent: ViewGroup, x: Float, y: Float): View? {
+    val n = parent.childCount
+    if (parent === this && n <= 1) {
+      return null
+    }
+
+    var start = 0
+    if (parent === this) {
+      start = 1
+    }
+
+    for (i in start until n) {
+      val child = parent.getChildAt(i)
+      if (child.visibility != View.VISIBLE) {
+        continue
+      }
+
+      child.getHitRect(rect)
+      if (rect.contains(x.toInt(), y.toInt())) {
+        if (child.canScrollHorizontally(-1)) {
+          return child
+        } else if (child is ViewGroup) {
+          val v = findScrollingChild(child, x - rect.left, y - rect.top)
+          if (v != null) {
+            return v
+          }
+        }
+      }
+    }
+    return null
+  }
+}

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<com.itsaky.androidide.views.InterceptableDrawerLayout 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:id="@+id/editor_drawerLayout"
@@ -99,4 +99,4 @@
 
     </com.google.android.material.navigation.NavigationView>
 
-</androidx.drawerlayout.widget.DrawerLayout>
+</com.itsaky.androidide.views.InterceptableDrawerLayout>

lsp/models/src/androidTest/java/com/itsaky/androidide/lsp/models/ExampleInstrumentedTest.kt

@@ -1,41 +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.lsp.models
-
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-  @Test
-  fun useAppContext() {
-    // Context of the app under test.
-    val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-    assertEquals("com.itsaky.androidide.lsp.models.test", appContext.packageName)
-  }
-}

treeview/src/main/java/com/unnamed/b/atv/view/AndroidTreeView.java

@@ -28,10 +28,10 @@ public class AndroidTreeView {
 
   public static final String NODES_PATH_SEPARATOR = ";";
   private final Context mContext;
+  private final int nodeViewBackground;
   protected TreeNode mRoot;
   private boolean applyForRoot;
   private int containerStyle = 0;
-  private int nodeViewBackground = 0;
   private TreeNode.BaseNodeViewHolder defaultViewHolder;
   private TreeNode.TreeNodeClickListener nodeClickListener;
   private TreeNode.TreeNodeLongClickListener nodeLongClickListener;
@@ -173,6 +173,8 @@ public class AndroidTreeView {
     viewTreeItems.setOrientation(LinearLayout.VERTICAL);
     view.addView(viewTreeItems);
 
+    view.setNestedScrollingEnabled(false);
+
     mRoot.setViewHolder(
         new TreeNode.BaseNodeViewHolder(mContext) {
           @Override
@@ -245,7 +247,7 @@ public class AndroidTreeView {
       List<TreeNode> children = node.getChildren();
       for (int i = 0; i < children.size(); i++) {
         TreeNode n = children.get(i);
-        collapseNode(n, includeSubnodes);
+        collapseNode(n, true);
       }
     }
   }
@@ -269,6 +271,7 @@ public class AndroidTreeView {
     parentViewHolder.getNodeItemsView().setVisibility(View.VISIBLE);
   }
 
+  @SuppressWarnings("unchecked")
   public <E> List<E> getSelectedValues(Class<E> clazz) {
     List<E> result = new ArrayList<>();
     List<TreeNode> selected = getSelected();
@@ -408,7 +411,7 @@ public class AndroidTreeView {
     }
     container.addView(nodeView);
     if (mSelectionModeEnabled) {
-      viewHolder.toggleSelectionMode(mSelectionModeEnabled);
+      viewHolder.toggleSelectionMode(true);
     }
 
     nodeView.setOnClickListener(