Merge "Simple implementation of Taskbar Overflow." into main
diff --git a/quickstep/res/drawable/taskbar_overflow_icon.xml b/quickstep/res/drawable/taskbar_overflow_icon.xml
new file mode 100644
index 0000000..b93a70e
--- /dev/null
+++ b/quickstep/res/drawable/taskbar_overflow_icon.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2024 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="48dp"
+    android:height="48dp"
+    android:viewportHeight="960"
+    android:viewportWidth="960">
+    <path
+        android:fillColor="@color/taskbar_divider_background"
+        android:pathData="M80,605v-250q0,-28.88 20.59,-49.44t49.5,-20.56q28.91,0 49.41,20.56Q220,326.12 220,355v250q0,28.87 -20.59,49.44Q178.82,675 149.91,675t-49.41,-20.56Q80,633.87 80,605ZM340,760q-24,0 -42,-18t-18,-42v-440q0,-24 18,-42t42,-18h280q24,0 42,18t18,42v440q0,24 -18,42t-42,18L340,760ZM740,605v-250q0,-28.88 20.59,-49.44t49.5,-20.56q28.91,0 49.41,20.56Q880,326.12 880,355v250q0,28.87 -20.59,49.44Q838.82,675 809.91,675t-49.41,-20.56Q740,633.87 740,605ZM340,700h280v-440L340,260v440ZM480,480Z"/>
+</vector>
diff --git a/quickstep/res/layout/taskbar_overflow_button.xml b/quickstep/res/layout/taskbar_overflow_button.xml
new file mode 100644
index 0000000..20104f2
--- /dev/null
+++ b/quickstep/res/layout/taskbar_overflow_button.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2024 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!-- Note: The actual size will match the taskbar icon sizes in TaskbarView#onLayout(). -->
+<com.android.launcher3.views.IconButtonView xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/BaseIcon.Workspace.Taskbar"
+    android:layout_width="@dimen/taskbar_icon_min_touch_size"
+    android:layout_height="@dimen/taskbar_icon_min_touch_size"
+    android:backgroundTint="@android:color/transparent"
+    android:contentDescription="@string/taskbar_overflow_a11y_title" />
diff --git a/quickstep/res/values/strings.xml b/quickstep/res/values/strings.xml
index f72f3c5..008766b 100644
--- a/quickstep/res/values/strings.xml
+++ b/quickstep/res/values/strings.xml
@@ -320,6 +320,8 @@
     <string name="change_navigation_mode">Change navigation mode</string>
     <!-- Accessibility title for the Taskbar vertical divider icon. [CHAR_LIMIT=NONE] -->
     <string name="taskbar_divider_a11y_title">Taskbar Divider</string>
+    <!-- Accessibility title for the Taskbar Overflow icon. [CHAR_LIMIT=NONE] -->
+    <string name="taskbar_overflow_a11y_title">Taskbar Overflow</string>
 
 
     <!-- Label for moving drop target to the top or left side of the screen, depending on orientation (from the Taskbar only). -->
diff --git a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchView.java b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchView.java
index b4102a9..fc8204a 100644
--- a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchView.java
@@ -58,8 +58,12 @@
 import java.util.Locale;
 
 /**
- * View that allows quick switching between recent tasks through keyboard alt-tab and alt-shift-tab
- * commands.
+ * View that allows quick switching between recent tasks.
+ *
+ * Can be access via:
+ * - keyboard alt-tab
+ * - alt-shift-tab
+ * - taskbar overflow button
  */
 public class KeyboardQuickSwitchView extends ConstraintLayout {
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index b95c406..4f9310c 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -29,6 +29,7 @@
 import static com.android.launcher3.AbstractFloatingView.TYPE_REBIND_SAFE;
 import static com.android.launcher3.AbstractFloatingView.TYPE_TASKBAR_OVERLAY_PROXY;
 import static com.android.launcher3.Flags.enableCursorHoverStates;
+import static com.android.launcher3.Flags.taskbarOverflow;
 import static com.android.launcher3.Utilities.calculateTextHeight;
 import static com.android.launcher3.Utilities.isRunningInTestHarness;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_TASKBAR_NAVBAR_UNIFICATION;
@@ -1221,6 +1222,11 @@
         RecentsView recents = taskbarUIController.getRecentsView();
         boolean shouldCloseAllOpenViews = true;
         Object tag = view.getTag();
+
+        if (taskbarOverflow()) {
+            mControllers.keyboardQuickSwitchController.closeQuickSwitchView(false);
+        }
+
         if (tag instanceof GroupTask groupTask) {
             handleGroupTaskLaunch(
                     groupTask,
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 0389a11..2734137 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -46,6 +46,7 @@
 
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Flags;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
@@ -63,6 +64,7 @@
 import com.android.launcher3.util.LauncherBindableItemsContainer;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.views.ActivityContext;
+import com.android.launcher3.views.IconButtonView;
 import com.android.quickstep.util.DesktopTask;
 import com.android.quickstep.util.GroupTask;
 import com.android.systemui.shared.recents.model.Task;
@@ -100,9 +102,12 @@
     // Only non-null when device supports having an All Apps button.
     @Nullable private final TaskbarAllAppsButtonContainer mAllAppsButtonContainer;
 
-    // Only non-null when device supports having an All Apps button.
+    // Only non-null when device supports having a Divider button.
     @Nullable private TaskbarDividerContainer mTaskbarDividerContainer;
 
+    // Only non-null when device supports having a Taskbar Overflow button.
+    @Nullable private IconButtonView mTaskbarOverflowView;
+
     /**
      * Whether the divider is between Hotseat icons and Recents,
      * instead of between All Apps button and Hotseat.
@@ -171,6 +176,13 @@
             mTaskbarDividerContainer = new TaskbarDividerContainer(context);
         }
 
+        if (Flags.taskbarOverflow()) {
+            mTaskbarOverflowView = (IconButtonView) LayoutInflater.from(context)
+                    .inflate(R.layout.taskbar_overflow_button, this, false);
+            mTaskbarOverflowView.setIconDrawable(
+                    resources.getDrawable(R.drawable.taskbar_overflow_icon));
+            mTaskbarOverflowView.setPadding(mItemPadding, mItemPadding, mItemPadding, mItemPadding);
+        }
         // TODO: Disable touch events on QSB otherwise it can crash.
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
     }
@@ -263,6 +275,12 @@
         if (mTaskbarDividerContainer != null && callbacks.supportsDividerLongPress()) {
             mTaskbarDividerContainer.setUpCallbacks(callbacks);
         }
+        if (mTaskbarOverflowView != null) {
+            mTaskbarOverflowView.setOnClickListener(
+                    mControllerCallbacks.getOverflowOnClickListener());
+            mTaskbarOverflowView.setOnLongClickListener(
+                    mControllerCallbacks.getOverflowOnLongClickListener());
+        }
     }
 
     private void removeAndRecycle(View view) {
@@ -290,6 +308,9 @@
                 removeView(mTaskbarDividerContainer);
             }
         }
+        if (mTaskbarOverflowView != null) {
+            removeView(mTaskbarOverflowView);
+        }
         removeView(mQsb);
 
         // Add Hotseat icons.
@@ -377,6 +398,9 @@
         if (mTaskbarDividerContainer != null && !recentTasks.isEmpty()) {
             addView(mTaskbarDividerContainer, nextViewIndex++);
             mAddedDividerForRecents = true;
+            if (mTaskbarOverflowView != null) {
+                addView(mTaskbarOverflowView, nextViewIndex++);
+            }
         }
 
         // Add Recent/Running icons.
@@ -699,6 +723,14 @@
     }
 
     /**
+     * Returns the taskbar overflow view in the taskbar.
+     */
+    @Nullable
+    public IconButtonView getTaskbarOverflowView() {
+        return mTaskbarOverflowView;
+    }
+
+    /**
      * Returns whether the divider is between Hotseat icons and Recents,
      * instead of between All Apps button and Hotseat.
      */
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewCallbacks.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewCallbacks.java
index 5c8d439..d108d8c 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewCallbacks.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewCallbacks.java
@@ -134,4 +134,25 @@
         return Flags.enableBubbleBarInPersistentTaskBar()
                 && mControllers.bubbleControllers.isPresent();
     }
+
+    /** Returns on click listener for the taskbar overflow view. */
+    public View.OnClickListener getOverflowOnClickListener() {
+        return new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mControllers.keyboardQuickSwitchController.openQuickSwitchView();
+            }
+        };
+    }
+
+    /** Returns on long click listener for the taskbar overflow view. */
+    public View.OnLongClickListener getOverflowOnLongClickListener() {
+        return new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View v) {
+                mControllers.keyboardQuickSwitchController.openQuickSwitchView();
+                return true;
+            }
+        };
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index 0a67ac2..3a84915 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -831,6 +831,7 @@
             View child = mTaskbarView.getChildAt(i);
             boolean isAllAppsButton = child == mTaskbarView.getAllAppsButtonContainer();
             boolean isTaskbarDividerView = child == mTaskbarView.getTaskbarDividerViewContainer();
+            boolean isTaskbarOverflowView = child == mTaskbarView.getTaskbarOverflowView();
             boolean isRecentTask = child.getTag() instanceof GroupTask;
             // TODO(b/343522351): show recents on the home screen.
             final boolean isRecentsInHotseat = false;
@@ -841,7 +842,8 @@
                 setter.setViewAlpha(child, 0, Interpolators.clampToProgress(LINEAR, 0.8f, 1f));
             } else if ((isAllAppsButton && !FeatureFlags.enableAllAppsButtonInHotseat())
                     || (isTaskbarDividerView && enableTaskbarPinning())
-                    || (isRecentTask && !isRecentsInHotseat)) {
+                    || (isRecentTask && !isRecentsInHotseat)
+                    || isTaskbarOverflowView) {
                 if (!isToHome
                         && mIsHotseatIconOnTopWhenAligned
                         && mIsStashed) {