Merge "Prevent setting task thumbnail during swipe to overview" into sc-dev
diff --git a/AndroidManifest-common.xml b/AndroidManifest-common.xml
index 4fd2e40..4e72260 100644
--- a/AndroidManifest-common.xml
+++ b/AndroidManifest-common.xml
@@ -116,8 +116,7 @@
             android:theme="@style/AppItemActivityTheme"
             android:excludeFromRecents="true"
             android:autoRemoveFromRecents="true"
-            android:exported="true"
-            android:label="@string/action_add_to_workspace" >
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.content.pm.action.CONFIRM_PIN_SHORTCUT" />
                 <action android:name="android.content.pm.action.CONFIRM_PIN_APPWIDGET" />
diff --git a/quickstep/res/layout/taskbar_divider.xml b/quickstep/res/layout/taskbar_divider.xml
index 6e1aa1e..87649f7 100644
--- a/quickstep/res/layout/taskbar_divider.xml
+++ b/quickstep/res/layout/taskbar_divider.xml
@@ -18,6 +18,4 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="@dimen/taskbar_divider_thickness"
     android:layout_height="@dimen/taskbar_divider_height"
-    android:layout_marginStart="@dimen/taskbar_icon_spacing"
-    android:layout_marginEnd="@dimen/taskbar_icon_spacing"
     android:background="@color/taskbar_divider" />
\ No newline at end of file
diff --git a/quickstep/res/layout/taskbar_view.xml b/quickstep/res/layout/taskbar_view.xml
new file mode 100644
index 0000000..34a88ea
--- /dev/null
+++ b/quickstep/res/layout/taskbar_view.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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.
+-->
+
+<com.android.launcher3.taskbar.TaskbarView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/taskbar_view"
+    android:layout_width="match_parent"
+    android:layout_height="@dimen/taskbar_size"
+    android:background="@android:color/transparent"
+    android:layout_gravity="bottom"
+    android:gravity="center"
+    android:visibility="gone" />
+
diff --git a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
index c4becf1..9ab49ce 100644
--- a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
@@ -46,6 +46,7 @@
 import com.android.launcher3.taskbar.TaskbarActivityContext;
 import com.android.launcher3.taskbar.TaskbarController;
 import com.android.launcher3.taskbar.TaskbarStateHandler;
+import com.android.launcher3.taskbar.TaskbarView;
 import com.android.launcher3.uioverrides.RecentsViewStateController;
 import com.android.launcher3.util.ActivityOptionsWrapper;
 import com.android.launcher3.util.DisplayController;
@@ -243,9 +244,10 @@
             mTaskbarController = null;
         }
         if (mDeviceProfile.isTaskbarPresent) {
+            TaskbarView taskbarViewOnHome = (TaskbarView) mHotseat.getTaskbarView();
             TaskbarActivityContext taskbarActivityContext = new TaskbarActivityContext(this);
             mTaskbarController = new TaskbarController(this,
-                    taskbarActivityContext.getTaskbarContainerView());
+                    taskbarActivityContext.getTaskbarContainerView(), taskbarViewOnHome);
             mTaskbarController.init();
         }
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 8312b82..fc5e2c1 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -54,10 +54,7 @@
         return mTaskbarContainerView;
     }
 
-    /**
-     * @return A LayoutInflater to use in this Context. Views inflated with this LayoutInflater will
-     * be able to access this TaskbarActivityContext via ActivityContext.lookupContext().
-     */
+    @Override
     public LayoutInflater getLayoutInflater() {
         return mLayoutInflater;
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java
index 528f43e..5202d91 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java
@@ -84,7 +84,7 @@
     private ViewTreeObserverWrapper.OnComputeInsetsListener createTaskbarInsetsComputer() {
         return insetsInfo -> {
             if (getAlpha() < AlphaUpdateListener.ALPHA_CUTOFF_THRESHOLD
-                    || mTaskbarView.isDraggingItem()) {
+                    || mTaskbarView.getVisibility() != VISIBLE || mTaskbarView.isDraggingItem()) {
                 // We're invisible or dragging out of taskbar, let touches pass through us.
                 insetsInfo.touchableRegion.setEmpty();
                 insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java
index f652961..abf6d54 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java
@@ -19,8 +19,6 @@
 import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
 
-import static com.android.launcher3.AbstractFloatingView.TYPE_HIDE_TASKBAR;
-import static com.android.launcher3.AbstractFloatingView.TYPE_REPLACE_TASKBAR_WITH_HOTSEAT;
 import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.systemui.shared.system.WindowManagerWrapper.ITYPE_BOTTOM_TAPPABLE_ELEMENT;
@@ -43,7 +41,6 @@
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BaseQuickstepLauncher;
 import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.Hotseat;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.R;
@@ -54,6 +51,7 @@
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.touch.ItemClickHandler;
+import com.android.launcher3.views.ActivityContext;
 import com.android.quickstep.AnimatedFloat;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
@@ -70,7 +68,8 @@
     private static final String WINDOW_TITLE = "Taskbar";
 
     private final TaskbarContainerView mTaskbarContainerView;
-    private final TaskbarView mTaskbarView;
+    private final TaskbarView mTaskbarViewInApp;
+    private final TaskbarView mTaskbarViewOnHome;
     private final BaseQuickstepLauncher mLauncher;
     private final WindowManager mWindowManager;
     // Layout width and height of the Taskbar in the default state.
@@ -91,14 +90,17 @@
 
     private @Nullable Animator mAnimator;
     private boolean mIsAnimatingToLauncher;
+    private boolean mIsAnimatingToApp;
 
     public TaskbarController(BaseQuickstepLauncher launcher,
-            TaskbarContainerView taskbarContainerView) {
+            TaskbarContainerView taskbarContainerView, TaskbarView taskbarViewOnHome) {
         mLauncher = launcher;
         mTaskbarContainerView = taskbarContainerView;
         mTaskbarContainerView.construct(createTaskbarContainerViewCallbacks());
-        mTaskbarView = mTaskbarContainerView.findViewById(R.id.taskbar_view);
-        mTaskbarView.construct(createTaskbarViewCallbacks());
+        mTaskbarViewInApp = mTaskbarContainerView.findViewById(R.id.taskbar_view);
+        mTaskbarViewInApp.construct(createTaskbarViewCallbacks());
+        mTaskbarViewOnHome = taskbarViewOnHome;
+        mTaskbarViewOnHome.construct(createTaskbarViewCallbacks());
         mWindowManager = mLauncher.getWindowManager();
         mTaskbarSize = new Point(MATCH_PARENT, mLauncher.getDeviceProfile().taskbarSize);
         mTaskbarStateHandler = mLauncher.getTaskbarStateHandler();
@@ -115,12 +117,13 @@
         return new TaskbarVisibilityControllerCallbacks() {
             @Override
             public void updateTaskbarBackgroundAlpha(float alpha) {
-                mTaskbarView.setBackgroundAlpha(alpha);
+                mTaskbarViewInApp.setBackgroundAlpha(alpha);
             }
 
             @Override
             public void updateTaskbarVisibilityAlpha(float alpha) {
                 mTaskbarContainerView.setAlpha(alpha);
+                mTaskbarViewOnHome.setAlpha(alpha);
             }
         };
     }
@@ -196,7 +199,7 @@
             public View.OnLongClickListener getItemOnLongClickListener() {
                 return view -> {
                     if (mLauncher.hasBeenResumed() && view.getTag() instanceof ItemInfo) {
-                        alignRealHotseatWithTaskbar();
+                        // TODO: remove this path
                         return mDragController.startWorkspaceDragOnLongClick(view);
                     } else {
                         return mDragController.startSystemDragOnLongClick(view);
@@ -205,11 +208,24 @@
             }
 
             @Override
-            public int getEmptyHotseatViewVisibility() {
+            public int getEmptyHotseatViewVisibility(TaskbarView taskbarView) {
                 // When on the home screen, we want the empty hotseat views to take up their full
                 // space so that the others line up with the home screen hotseat.
-                return mLauncher.hasBeenResumed() || mIsAnimatingToLauncher
-                        ? View.INVISIBLE : View.GONE;
+                boolean isOnHomeScreen = taskbarView == mTaskbarViewOnHome
+                        || mLauncher.hasBeenResumed() || mIsAnimatingToLauncher;
+                return isOnHomeScreen ? View.INVISIBLE : View.GONE;
+            }
+
+            @Override
+            public float getNonIconScale(TaskbarView taskbarView) {
+                return taskbarView == mTaskbarViewOnHome ? getTaskbarScaleOnHome() : 1f;
+            }
+
+            @Override
+            public void onItemPositionsChanged(TaskbarView taskbarView) {
+                if (taskbarView == mTaskbarViewOnHome) {
+                    alignRealHotseatWithTaskbar();
+                }
             }
         };
     }
@@ -218,7 +234,7 @@
         return new TaskbarHotseatControllerCallbacks() {
             @Override
             public void updateHotseatItems(ItemInfo[] hotseatItemInfos) {
-                mTaskbarView.updateHotseatItems(hotseatItemInfos);
+                mTaskbarViewInApp.updateHotseatItems(hotseatItemInfos);
                 mLatestLoadedHotseatItems = hotseatItemInfos;
                 dedupeAndUpdateRecentItems();
             }
@@ -235,7 +251,8 @@
 
             @Override
             public void updateRecentTaskAtIndex(int taskIndex, Task task) {
-                mTaskbarView.updateRecentTaskAtIndex(taskIndex, task);
+                mTaskbarViewInApp.updateRecentTaskAtIndex(taskIndex, task);
+                mTaskbarViewOnHome.updateRecentTaskAtIndex(taskIndex, task);
             }
         };
     }
@@ -244,16 +261,20 @@
      * Initializes the Taskbar, including adding it to the screen.
      */
     public void init() {
-        mTaskbarView.init(mHotseatController.getNumHotseatIcons(),
+        mTaskbarViewInApp.init(mHotseatController.getNumHotseatIcons(),
                 mRecentsController.getNumRecentIcons());
-        mTaskbarContainerView.init(mTaskbarView);
+        mTaskbarViewOnHome.init(mHotseatController.getNumHotseatIcons(),
+                mRecentsController.getNumRecentIcons());
+        mTaskbarContainerView.init(mTaskbarViewInApp);
         addToWindowManager();
         mTaskbarStateHandler.setTaskbarCallbacks(createTaskbarStateHandlerCallbacks());
         mTaskbarVisibilityController.init();
         mHotseatController.init();
         mRecentsController.init();
 
-        SCALE_PROPERTY.set(mTaskbarView, mLauncher.hasBeenResumed() ? getTaskbarScaleOnHome() : 1f);
+        SCALE_PROPERTY.set(mTaskbarViewInApp, mLauncher.hasBeenResumed()
+                ? getTaskbarScaleOnHome() : 1f);
+        updateWhichTaskbarViewIsVisible();
     }
 
     private TaskbarStateHandlerCallbacks createTaskbarStateHandlerCallbacks() {
@@ -274,7 +295,8 @@
             mAnimator.end();
         }
 
-        mTaskbarView.cleanup();
+        mTaskbarViewInApp.cleanup();
+        mTaskbarViewOnHome.cleanup();
         mTaskbarContainerView.cleanup();
         removeFromWindowManager();
         mTaskbarStateHandler.setTaskbarCallbacks(null);
@@ -313,7 +335,7 @@
         TaskbarContainerView.LayoutParams taskbarLayoutParams =
                 new TaskbarContainerView.LayoutParams(mTaskbarSize.x, mTaskbarSize.y);
         taskbarLayoutParams.gravity = gravity;
-        mTaskbarView.setLayoutParams(taskbarLayoutParams);
+        mTaskbarViewInApp.setLayoutParams(taskbarLayoutParams);
 
         mWindowManager.addView(mTaskbarContainerView, mWindowLayoutParams);
     }
@@ -330,7 +352,6 @@
             mAnimator = createAnimToLauncher(null, duration);
         } else {
             mAnimator = createAnimToApp(duration);
-            replaceTaskbarWithHotseatOrViceVersa();
         }
         mAnimator.addListener(new AnimatorListenerAdapter() {
             @Override
@@ -351,36 +372,41 @@
         if (toState != null) {
             mTaskbarStateHandler.setStateWithAnimation(toState, new StateAnimationConfig(), anim);
         }
-        anim.addFloat(mTaskbarView, SCALE_PROPERTY, mTaskbarView.getScaleX(),
+        anim.addFloat(mTaskbarViewInApp, SCALE_PROPERTY, mTaskbarViewInApp.getScaleX(),
                 getTaskbarScaleOnHome(), LINEAR);
 
         anim.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
                 mIsAnimatingToLauncher = true;
-                mTaskbarView.updateHotseatItemsVisibility();
+                mTaskbarViewInApp.updateHotseatItemsVisibility();
             }
 
             @Override
             public void onAnimationEnd(Animator animation) {
                 mIsAnimatingToLauncher = false;
+                updateWhichTaskbarViewIsVisible();
             }
         });
 
-        anim.addOnFrameCallback(this::alignRealHotseatWithTaskbar);
-
         return anim.buildAnim();
     }
 
     private Animator createAnimToApp(long duration) {
         PendingAnimation anim = new PendingAnimation(duration);
         anim.add(mTaskbarVisibilityController.createAnimToBackgroundAlpha(1, duration));
-        anim.addFloat(mTaskbarView, SCALE_PROPERTY, mTaskbarView.getScaleX(), 1f, LINEAR);
+        anim.addFloat(mTaskbarViewInApp, SCALE_PROPERTY, mTaskbarViewInApp.getScaleX(), 1f, LINEAR);
         anim.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
-                mTaskbarView.updateHotseatItemsVisibility();
-                setReplaceTaskbarWithHotseat(false);
+                mIsAnimatingToApp = true;
+                mTaskbarViewInApp.updateHotseatItemsVisibility();
+                updateWhichTaskbarViewIsVisible();
+            }
+
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mIsAnimatingToApp = false;
             }
         });
         return anim.buildAnim();
@@ -405,11 +431,11 @@
      * @return Whether any Taskbar item could handle the given MotionEvent if given the chance.
      */
     public boolean isEventOverAnyTaskbarItem(MotionEvent ev) {
-        return mTaskbarView.isEventOverAnyItem(ev);
+        return mTaskbarViewInApp.isEventOverAnyItem(ev);
     }
 
     public boolean isDraggingItem() {
-        return mTaskbarView.isDraggingItem();
+        return mTaskbarViewInApp.isDraggingItem() || mTaskbarViewOnHome.isDraggingItem();
     }
 
     private void dedupeAndUpdateRecentItems() {
@@ -454,7 +480,8 @@
             tasksArray[tasksArray.length - 1 - i] = task;
         }
 
-        mTaskbarView.updateRecentTasks(tasksArray);
+        mTaskbarViewInApp.updateRecentTasks(tasksArray);
+        mTaskbarViewOnHome.updateRecentTasks(tasksArray);
         mRecentsController.loadIconsForTasks(tasksArray);
     }
 
@@ -475,10 +502,11 @@
         int hotseatHeight = grid.workspacePadding.bottom + grid.taskbarSize;
         int hotseatTopDiff = hotseatHeight - grid.taskbarSize;
 
-        mTaskbarView.getHotseatBoundsAtScale(getTaskbarScaleOnHome()).roundOut(hotseatBounds);
-        mLauncher.getHotseat().setPadding(hotseatBounds.left, hotseatBounds.top + hotseatTopDiff,
-                mTaskbarView.getWidth() - hotseatBounds.right,
-                mTaskbarView.getHeight() - hotseatBounds.bottom);
+        mTaskbarViewOnHome.getHotseatBounds().roundOut(hotseatBounds);
+        mLauncher.getHotseat().setPadding(hotseatBounds.left,
+                hotseatBounds.top + hotseatTopDiff,
+                mTaskbarViewOnHome.getWidth() - hotseatBounds.right,
+                mTaskbarViewOnHome.getHeight() - hotseatBounds.bottom);
     }
 
     /**
@@ -486,36 +514,32 @@
      * show the real one instead.
      */
     public void onLauncherDragLayerHierarchyChanged() {
-        replaceTaskbarWithHotseatOrViceVersa();
+        // TODO: remove, as this is a no-op now
     }
 
-    private void replaceTaskbarWithHotseatOrViceVersa() {
-        boolean replaceTaskbarWithHotseat = AbstractFloatingView.getTopOpenViewWithType(mLauncher,
-                TYPE_REPLACE_TASKBAR_WITH_HOTSEAT) != null;
-        if (!mLauncher.hasBeenResumed()) {
-            replaceTaskbarWithHotseat = false;
-        }
-        setReplaceTaskbarWithHotseat(replaceTaskbarWithHotseat);
-
-        boolean hideTaskbar = AbstractFloatingView.getTopOpenViewWithType(mLauncher,
-                TYPE_HIDE_TASKBAR) != null;
-        mTaskbarVisibilityController.animateToVisibilityForFloatingView(hideTaskbar ? 0f : 1f);
-    }
-
-    private void setReplaceTaskbarWithHotseat(boolean replaceTaskbarWithHotseat) {
-        Hotseat hotseat = mLauncher.getHotseat();
-        if (replaceTaskbarWithHotseat) {
-            alignRealHotseatWithTaskbar();
-            hotseat.getReplaceTaskbarAlpha().setValue(1f);
-            mTaskbarView.setHotseatViewsHidden(true);
+    private void updateWhichTaskbarViewIsVisible() {
+        boolean isInApp = !mLauncher.hasBeenResumed() || mIsAnimatingToLauncher
+                || mIsAnimatingToApp;
+        if (isInApp) {
+            mTaskbarViewInApp.setVisibility(View.VISIBLE);
+            mTaskbarViewOnHome.setVisibility(View.INVISIBLE);
+            mLauncher.getHotseat().setIconsAlpha(0);
         } else {
-            hotseat.getReplaceTaskbarAlpha().setValue(0f);
-            mTaskbarView.setHotseatViewsHidden(false);
+            mTaskbarViewInApp.setVisibility(View.INVISIBLE);
+            mTaskbarViewOnHome.setVisibility(View.VISIBLE);
+            mLauncher.getHotseat().setIconsAlpha(1);
         }
     }
 
-    private float getTaskbarScaleOnHome() {
-        return 1f / mTaskbarContainerView.getTaskbarActivityContext().getTaskbarIconScale();
+    /**
+     * Returns the ratio of the taskbar icon size on home vs in an app.
+     */
+    public float getTaskbarScaleOnHome() {
+        DeviceProfile inAppDp = mTaskbarContainerView.getTaskbarActivityContext()
+                .getDeviceProfile();
+        DeviceProfile onHomeDp = ActivityContext.lookupContext(mTaskbarViewOnHome.getContext())
+                .getDeviceProfile();
+        return (float) onHomeDp.cellWidthPx / inAppDp.cellWidthPx;
     }
 
     /**
@@ -561,7 +585,10 @@
     protected interface TaskbarViewCallbacks {
         View.OnClickListener getItemOnClickListener();
         View.OnLongClickListener getItemOnLongClickListener();
-        int getEmptyHotseatViewVisibility();
+        int getEmptyHotseatViewVisibility(TaskbarView taskbarView);
+        /** Returns how much to scale non-icon elements such as spacing and dividers. */
+        float getNonIconScale(TaskbarView taskbarView);
+        void onItemPositionsChanged(TaskbarView taskbarView);
     }
 
     /**
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 1d762e9..3567c17 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -15,11 +15,14 @@
  */
 package com.android.launcher3.taskbar;
 
+import android.animation.Animator;
+import android.animation.AnimatorSet;
 import android.animation.LayoutTransition;
+import android.animation.ValueAnimator;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Canvas;
-import android.graphics.Matrix;
+import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
@@ -36,6 +39,7 @@
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.folder.FolderIcon;
@@ -48,20 +52,23 @@
 /**
  * Hosts the Taskbar content such as Hotseat and Recent Apps. Drawn on top of other apps.
  */
-public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconParent {
+public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconParent, Insettable {
 
     private final ColorDrawable mBackgroundDrawable;
-    private final int mItemMarginLeftRight;
+    private final int mDividerWidth;
+    private final int mDividerHeight;
     private final int mIconTouchSize;
     private final boolean mIsRtl;
     private final int mTouchSlop;
     private final RectF mTempDelegateBounds = new RectF();
     private final RectF mDelegateSlopBounds = new RectF();
     private final int[] mTempOutLocation = new int[2];
-    private final Matrix mTempMatrix = new Matrix();
 
     // Initialized in TaskbarController constructor.
     private TaskbarController.TaskbarViewCallbacks mControllerCallbacks;
+    // Scale on elements that aren't icons.
+    private float mNonIconScale;
+    private int mItemMarginLeftRight;
 
     // Initialized in init().
     private LayoutTransition mLayoutTransition;
@@ -78,7 +85,6 @@
     private boolean mIsDraggingItem;
     // Only non-null when the corresponding Folder is open.
     private @Nullable FolderIcon mLeaveBehindFolderIcon;
-    private boolean mIsHotseatHidden;
 
     public TaskbarView(@NonNull Context context) {
         this(context, null);
@@ -99,7 +105,8 @@
 
         Resources resources = getResources();
         mBackgroundDrawable = (ColorDrawable) getBackground();
-        mItemMarginLeftRight = resources.getDimensionPixelSize(R.dimen.taskbar_icon_spacing);
+        mDividerWidth = resources.getDimensionPixelSize(R.dimen.taskbar_divider_thickness);
+        mDividerHeight = resources.getDimensionPixelSize(R.dimen.taskbar_divider_height);
         mIconTouchSize = resources.getDimensionPixelSize(R.dimen.taskbar_icon_touch_size);
         mIsRtl = Utilities.isRtl(resources);
         mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
@@ -107,11 +114,16 @@
 
     protected void construct(TaskbarController.TaskbarViewCallbacks taskbarViewCallbacks) {
         mControllerCallbacks = taskbarViewCallbacks;
+        mNonIconScale = mControllerCallbacks.getNonIconScale(this);
+        mItemMarginLeftRight = getResources().getDimensionPixelSize(R.dimen.taskbar_icon_spacing);
+        mItemMarginLeftRight = Math.round(mItemMarginLeftRight * mNonIconScale);
     }
 
     protected void init(int numHotseatIcons, int numRecentIcons) {
         mLayoutTransition = new LayoutTransition();
-        setLayoutTransitionsEnabled(true);
+        addUpdateListenerForAllLayoutTransitions(
+                () -> mControllerCallbacks.onItemPositionsChanged(this));
+        setLayoutTransition(mLayoutTransition);
 
         mHotseatStartIndex = 0;
         mHotseatEndIndex = mHotseatStartIndex + numHotseatIcons - 1;
@@ -125,12 +137,30 @@
         updateRecentTasks(new Task[numRecentIcons]);
     }
 
-    private void setLayoutTransitionsEnabled(boolean enabled) {
-        setLayoutTransition(enabled ? mLayoutTransition : null);
+    private void addUpdateListenerForAllLayoutTransitions(Runnable onUpdate) {
+        addUpdateListenerForLayoutTransition(LayoutTransition.CHANGE_APPEARING, onUpdate);
+        addUpdateListenerForLayoutTransition(LayoutTransition.CHANGE_DISAPPEARING, onUpdate);
+        addUpdateListenerForLayoutTransition(LayoutTransition.CHANGING, onUpdate);
+        addUpdateListenerForLayoutTransition(LayoutTransition.APPEARING, onUpdate);
+        addUpdateListenerForLayoutTransition(LayoutTransition.DISAPPEARING, onUpdate);
+    }
+
+    private void addUpdateListenerForLayoutTransition(int transitionType, Runnable onUpdate) {
+        Animator anim = mLayoutTransition.getAnimator(transitionType);
+        if (anim instanceof ValueAnimator) {
+            ((ValueAnimator) anim).addUpdateListener(valueAnimator -> onUpdate.run());
+        } else {
+            AnimatorSet animSet = new AnimatorSet();
+            ValueAnimator updateAnim = ValueAnimator.ofFloat(0, 1);
+            updateAnim.addUpdateListener(valueAnimator -> onUpdate.run());
+            animSet.playTogether(anim, updateAnim);
+            mLayoutTransition.setAnimator(transitionType, animSet);
+        }
     }
 
     protected void cleanup() {
         removeAllViews();
+        mHotseatRecentsDivider = null;
     }
 
     /**
@@ -170,12 +200,11 @@
             if (hotseatView == null || hotseatView.getSourceLayoutResId() != expectedLayoutResId
                     || needsReinflate) {
                 removeView(hotseatView);
-                TaskbarActivityContext activityContext =
-                        ActivityContext.lookupContext(getContext());
+                ActivityContext activityContext = ActivityContext.lookupContext(getContext());
                 if (isFolder) {
                     FolderInfo folderInfo = (FolderInfo) hotseatItemInfo;
                     FolderIcon folderIcon = FolderIcon.inflateFolderAndIcon(expectedLayoutResId,
-                            activityContext, this, folderInfo);
+                            ActivityContext.lookupContext(getContext()), this, folderInfo);
                     folderIcon.setTextVisible(false);
                     hotseatView = folderIcon;
                 } else {
@@ -216,22 +245,12 @@
         }
     }
 
-    /**
-     * Hides or shows the hotseat items immediately (without layout transitions).
-     */
-    protected void setHotseatViewsHidden(boolean hidden) {
-        mIsHotseatHidden = hidden;
-        setLayoutTransitionsEnabled(false);
-        updateHotseatItemsVisibility();
-        setLayoutTransitionsEnabled(true);
-    }
-
     private void updateHotseatItemVisibility(View hotseatView) {
         if (hotseatView.getTag() != null) {
-            hotseatView.setVisibility(mIsHotseatHidden ? INVISIBLE : VISIBLE);
+            hotseatView.setVisibility(VISIBLE);
         } else {
             int oldVisibility = hotseatView.getVisibility();
-            int newVisibility = mControllerCallbacks.getEmptyHotseatViewVisibility();
+            int newVisibility = mControllerCallbacks.getEmptyHotseatViewVisibility(this);
             hotseatView.setVisibility(newVisibility);
             if (oldVisibility == GONE && newVisibility != GONE) {
                 // By default, the layout transition only runs when going to VISIBLE,
@@ -243,7 +262,11 @@
 
     private View addDivider(int dividerIndex) {
         View divider = inflate(R.layout.taskbar_divider);
-        addView(divider, dividerIndex);
+        LayoutParams lp = new LayoutParams(mDividerWidth, mDividerHeight);
+        lp.setMargins(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
+        divider.setScaleX(mNonIconScale);
+        divider.setScaleY(mNonIconScale);
+        addView(divider, dividerIndex, lp);
         return divider;
     }
 
@@ -437,9 +460,9 @@
     }
 
     /**
-     * @return The bounding box of where the hotseat elements will be when we reach the given scale.
+     * @return The bounding box of where the hotseat elements are relative to this TaskbarView.
      */
-    protected RectF getHotseatBoundsAtScale(float taskbarViewScale) {
+    protected RectF getHotseatBounds() {
         View firstHotseatView = null, lastHotseatView = null;
         for (int i = mHotseatStartIndex; i <= mHotseatEndIndex; i++) {
             View child = getChildAt(i);
@@ -455,14 +478,11 @@
         }
         View leftmostHotseatView = !mIsRtl ? firstHotseatView : lastHotseatView;
         View rightmostHotseatView = !mIsRtl ? lastHotseatView : firstHotseatView;
-        RectF hotseatBounds = new RectF(
+        return new RectF(
                 leftmostHotseatView.getLeft() - mItemMarginLeftRight,
                 leftmostHotseatView.getTop(),
                 rightmostHotseatView.getRight() + mItemMarginLeftRight,
                 rightmostHotseatView.getBottom());
-        mTempMatrix.setScale(taskbarViewScale, taskbarViewScale, getPivotX(), getPivotY());
-        mTempMatrix.mapRect(hotseatBounds);
-        return hotseatBounds;
     }
 
     // FolderIconParent implemented methods.
@@ -493,7 +513,12 @@
     }
 
     private View inflate(@LayoutRes int layoutResId) {
-        TaskbarActivityContext taskbarActivityContext = ActivityContext.lookupContext(getContext());
-        return taskbarActivityContext.getLayoutInflater().inflate(layoutResId, this, false);
+        return ActivityContext.lookupContext(getContext()).getLayoutInflater()
+                .inflate(layoutResId, this, false);
+    }
+
+    @Override
+    public void setInsets(Rect insets) {
+        // Ignore, we just implement Insettable to draw behind system insets.
     }
 }
diff --git a/quickstep/src/com/android/launcher3/uioverrides/states/BackgroundAppState.java b/quickstep/src/com/android/launcher3/uioverrides/states/BackgroundAppState.java
index fb58bf6..aa770d2 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/states/BackgroundAppState.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/states/BackgroundAppState.java
@@ -82,20 +82,6 @@
     }
 
     @Override
-    public ScaleAndTranslation getHotseatScaleAndTranslation(Launcher launcher) {
-        if ((getVisibleElements(launcher) & HOTSEAT_ICONS) != 0) {
-            // Translate hotseat offscreen if we show it in overview.
-            RecentsView recentsView = launcher.getOverviewPanel();
-            ScaleAndTranslation scaleAndTranslation = super.getHotseatScaleAndTranslation(launcher);
-            scaleAndTranslation.translationY += LayoutUtils.getShelfTrackingDistance(launcher,
-                    launcher.getDeviceProfile(),
-                    recentsView.getPagedOrientationHandler());
-            return scaleAndTranslation;
-        }
-        return super.getHotseatScaleAndTranslation(launcher);
-    }
-
-    @Override
     protected float getDepthUnchecked(Context context) {
         return 1f;
     }
diff --git a/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java b/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
index 5a28cfd..d8a5f9b 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
@@ -78,40 +78,11 @@
     }
 
     @Override
-    public ScaleAndTranslation getHotseatScaleAndTranslation(Launcher launcher) {
-        if ((getVisibleElements(launcher) & HOTSEAT_ICONS) != 0) {
-            DeviceProfile dp = launcher.getDeviceProfile();
-            if (dp.allAppsIconSizePx >= dp.iconSizePx) {
-                return new ScaleAndTranslation(1, 0, 0);
-            } else {
-                float scale = ((float) dp.allAppsIconSizePx) / dp.iconSizePx;
-                // Distance between the screen center (which is the pivotY for hotseat) and the
-                // bottom of the hotseat (which we want to preserve)
-                float distanceFromBottom = dp.heightPx / 2 - dp.hotseatBarBottomPaddingPx;
-                // On scaling, the bottom edge is moved closer to the pivotY. We move the
-                // hotseat back down so that the bottom edge's position is preserved.
-                float translationY = distanceFromBottom * (1 - scale);
-                return new ScaleAndTranslation(scale, 0, translationY);
-            }
-        }
-        return getWorkspaceScaleAndTranslation(launcher);
-    }
-
-    @Override
     public float[] getOverviewScaleAndOffset(Launcher launcher) {
         return new float[] {NO_SCALE, NO_OFFSET};
     }
 
     @Override
-    public ScaleAndTranslation getQsbScaleAndTranslation(Launcher launcher) {
-        if (this == OVERVIEW) {
-            // Treat the QSB as part of the hotseat so they move together.
-            return getHotseatScaleAndTranslation(launcher);
-        }
-        return super.getQsbScaleAndTranslation(launcher);
-    }
-
-    @Override
     public PageAlphaProvider getWorkspacePageAlphaProvider(Launcher launcher) {
         return new PageAlphaProvider(DEACCEL_2) {
             @Override
diff --git a/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java b/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java
index ae644cd..3faf72a 100644
--- a/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java
+++ b/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java
@@ -112,20 +112,32 @@
         }
 
         // Set up springs for the hotseat and qsb.
-        ViewGroup hotseatChild = (ViewGroup) hotseat.getChildAt(0);
+        ViewGroup hotseatIcons = hotseat.getShortcutsAndWidgets();
         if (grid.isVerticalBarLayout()) {
-            for (int i = hotseatChild.getChildCount() - 1; i >= 0; i--) {
-                View child = hotseatChild.getChildAt(i);
+            for (int i = hotseatIcons.getChildCount() - 1; i >= 0; i--) {
+                View child = hotseatIcons.getChildAt(i);
                 CellLayout.LayoutParams lp = ((CellLayout.LayoutParams) child.getLayoutParams());
                 addStaggeredAnimationForView(child, lp.cellY + 1, totalRows);
             }
         } else {
-            for (int i = hotseatChild.getChildCount() - 1; i >= 0; i--) {
-                View child = hotseatChild.getChildAt(i);
-                addStaggeredAnimationForView(child, grid.inv.numRows + 1, totalRows);
+            final int hotseatRow, qsbRow, taskbarRow;
+            if (grid.isTaskbarPresent) {
+                qsbRow = grid.inv.numRows + 1;
+                hotseatRow = grid.inv.numRows + 2;
+            } else {
+                hotseatRow = grid.inv.numRows + 1;
+                qsbRow = grid.inv.numRows + 2;
+            }
+            // Taskbar and hotseat overlap.
+            taskbarRow = hotseatRow;
+
+            for (int i = hotseatIcons.getChildCount() - 1; i >= 0; i--) {
+                View child = hotseatIcons.getChildAt(i);
+                addStaggeredAnimationForView(child, hotseatRow, totalRows);
             }
 
-            addStaggeredAnimationForView(hotseat.getQsb(), grid.inv.numRows + 2, totalRows);
+            addStaggeredAnimationForView(hotseat.getQsb(), qsbRow, totalRows);
+            addStaggeredAnimationForView(hotseat.getTaskbarView(), taskbarRow, totalRows);
         }
 
         if (animateOverviewScrim) {
diff --git a/res/drawable/add_item_dialog_background.xml b/res/drawable/add_item_dialog_background.xml
new file mode 100644
index 0000000..04bde8f
--- /dev/null
+++ b/res/drawable/add_item_dialog_background.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle" >
+    <solid android:color="?android:attr/colorBackground" />
+    <corners
+        android:topLeftRadius="?android:attr/dialogCornerRadius"
+        android:topRightRadius="?android:attr/dialogCornerRadius" />
+</shape>
\ No newline at end of file
diff --git a/res/drawable/add_item_dialog_button_background.xml b/res/drawable/add_item_dialog_button_background.xml
new file mode 100644
index 0000000..1b4591f
--- /dev/null
+++ b/res/drawable/add_item_dialog_button_background.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<inset
+    android:insetLeft="@dimen/pin_widget_button_inset_horizontal"
+    android:insetRight="@dimen/pin_widget_button_inset_horizontal"
+    android:insetTop="@dimen/pin_widget_button_inset_vertical"
+    android:insetBottom="@dimen/pin_widget_button_inset_vertical"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <ripple
+        android:color="?android:attr/colorControlHighlight">
+        <item>
+            <shape android:tint="?android:attr/colorAccent" android:shape="rectangle">
+                <corners android:radius="18dp" />
+                <solid android:color="#FFFFFF"  />
+                <padding
+                    android:left="@dimen/pin_widget_button_padding_horizontal"
+                    android:top="@dimen/pin_widget_button_padding_vertical"
+                    android:right="@dimen/pin_widget_button_padding_horizontal"
+                    android:bottom="@dimen/pin_widget_button_padding_vertical" />
+            </shape>
+        </item>
+    </ripple>
+</inset>
\ No newline at end of file
diff --git a/res/layout/add_item_confirmation_activity.xml b/res/layout/add_item_confirmation_activity.xml
index b1a1efe..d5e7333 100644
--- a/res/layout/add_item_confirmation_activity.xml
+++ b/res/layout/add_item_confirmation_activity.xml
@@ -17,70 +17,51 @@
 */
 -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/add_item_confirmation"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:padding="24dp"
     android:orientation="vertical">
-    <ScrollView
+
+    <TextView
+        style="@style/TextHeadline"
+        android:id="@+id/widget_appName"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="24sp"
+        android:ellipsize="end"
+        android:fadingEdge="horizontal"
+        android:singleLine="true"
+        android:maxLines="1" />
+
+    <include layout="@layout/widget_cell"
+        android:id="@+id/widget_cell"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1"
-        android:clipToPadding="false">
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="vertical">
-
-            <TextView
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:paddingBottom="20dp"
-                android:paddingLeft="24dp"
-                android:paddingRight="24dp"
-                android:paddingTop="4dp"
-                android:text="@string/add_item_request_drag_hint" />
-
-            <FrameLayout
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="?android:attr/colorPrimaryDark"
-                android:theme="?attr/widgetsTheme">
-
-                <com.android.launcher3.widget.WidgetCell
-                    android:id="@+id/widget_cell"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_gravity="center_horizontal"
-                    android:layout_weight="1"
-                    android:background="?android:attr/colorPrimaryDark"
-                    android:focusable="true"
-                    android:gravity="center_horizontal"
-                    android:orientation="vertical" >
-
-                    <include layout="@layout/widget_cell_content"  />
-
-                </com.android.launcher3.widget.WidgetCell>
-            </FrameLayout>
-        </LinearLayout>
-    </ScrollView>
+        android:layout_marginVertical="16dp" />
 
     <LinearLayout
-        style="?android:attr/buttonBarStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="end"
-        android:paddingBottom="4dp"
-        android:paddingEnd="12dp"
-        android:paddingStart="12dp"
-        android:paddingTop="4dp" >
+        android:padding="8dp"
+        android:orientation="horizontal">
         <Button
-            style="?android:attr/buttonBarButtonStyle"
+            style="@style/Widget.DeviceDefault.Button.Rounded.Colored"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:onClick="onCancelClick"
             android:text="@android:string/cancel" />
+
+        <Space
+            android:layout_width="4dp"
+            android:layout_height="wrap_content" />
+
         <Button
-            style="?android:attr/buttonBarButtonStyle"
+            style="@style/Widget.DeviceDefault.Button.Rounded.Colored"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:onClick="onPlaceAutomaticallyClick"
diff --git a/res/layout/app_widget_resize_frame.xml b/res/layout/app_widget_resize_frame.xml
index 2e476df..671dbc6 100644
--- a/res/layout/app_widget_resize_frame.xml
+++ b/res/layout/app_widget_resize_frame.xml
@@ -26,6 +26,7 @@
 
         <!-- Frame -->
         <ImageView
+            android:id="@+id/widget_resize_frame"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:layout_gravity="center"
diff --git a/res/layout/deep_shortcut.xml b/res/layout/deep_shortcut.xml
index d6b4a37..0d11b50 100644
--- a/res/layout/deep_shortcut.xml
+++ b/res/layout/deep_shortcut.xml
@@ -32,6 +32,8 @@
         android:paddingEnd="@dimen/popup_padding_end"
         android:drawableEnd="@drawable/ic_drag_handle"
         android:drawablePadding="@dimen/deep_shortcut_drawable_padding"
+        android:singleLine="true"
+        android:ellipsize="end"
         android:textSize="14sp"
         android:textColor="?android:attr/textColorPrimary"
         launcher:layoutHorizontal="true"
diff --git a/res/layout/system_shortcut.xml b/res/layout/system_shortcut.xml
index 68251e4..9f45f30 100644
--- a/res/layout/system_shortcut.xml
+++ b/res/layout/system_shortcut.xml
@@ -31,7 +31,8 @@
         android:paddingStart="@dimen/deep_shortcuts_text_padding_start"
         android:paddingEnd="@dimen/popup_padding_end"
         android:textSize="14sp"
-        android:maxLines="1"
+        android:singleLine="true"
+        android:ellipsize="end"
         android:textColor="?android:attr/textColorPrimary"
         launcher:iconDisplay="shortcut_popup"
         launcher:layoutHorizontal="true"
diff --git a/res/layout/taskbar_view.xml b/res/layout/taskbar_view.xml
new file mode 100644
index 0000000..96ae43d
--- /dev/null
+++ b/res/layout/taskbar_view.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2021 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.
+-->
+<Space
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="0dp"
+    android:layout_height="0dp"
+    android:visibility="gone" />
\ No newline at end of file
diff --git a/res/layout/widget_cell_content.xml b/res/layout/widget_cell_content.xml
index a3d0070..30bd8b1 100644
--- a/res/layout/widget_cell_content.xml
+++ b/res/layout/widget_cell_content.xml
@@ -18,8 +18,8 @@
     android:layout_height="wrap_content">
 
     <!-- The image of the widget. This view does not support padding. Any placement adjustment
-         should be done using margins.
-          width & height are set at runtime after scaling the preview image. -->
+         should be done using margins. Width & height are set at runtime after scaling the preview
+         image. -->
     <com.android.launcher3.widget.WidgetImageView
         android:id="@+id/widget_preview"
         android:layout_width="0dp"
@@ -41,16 +41,15 @@
         android:textColor="?android:attr/textColorPrimary"
         android:textSize="@dimen/widget_cell_font_size" />
 
-    <!-- The original dimensions of the widget (can't be the same text as above due to different
-         style. -->
+    <!-- The original dimensions of the widget -->
     <TextView
         android:id="@+id/widget_dims"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
-        android:textColor="?android:attr/textColorTertiary"
+        android:textColor="?android:attr/textColorSecondary"
         android:textSize="@dimen/widget_cell_font_size"
-        android:alpha="0.8" />
+        android:alpha="0.7" />
 
     <TextView
         android:id="@+id/widget_description"
@@ -58,9 +57,10 @@
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
         android:textSize="@dimen/widget_cell_font_size"
-        android:textColor="?android:attr/textColorTertiary"
+        android:textColor="?android:attr/textColorSecondary"
         android:maxLines="2"
         android:ellipsize="end"
-        android:fadingEdge="horizontal" />
+        android:fadingEdge="horizontal"
+        android:alpha="0.7" />
 
 </merge>
\ No newline at end of file
diff --git a/res/layout/widgets_bottom_sheet_content.xml b/res/layout/widgets_bottom_sheet_content.xml
index 916ff1b..a9d523a 100644
--- a/res/layout/widgets_bottom_sheet_content.xml
+++ b/res/layout/widgets_bottom_sheet_content.xml
@@ -29,16 +29,6 @@
         android:textColor="?android:attr/textColorPrimary"
         android:textSize="24sp"/>
 
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:gravity="center_horizontal"
-        android:paddingTop="4dp"
-        android:fontFamily="sans-serif"
-        android:textColor="?android:attr/textColorTertiary"
-        android:textSize="14sp"
-        android:text="@string/long_press_widget_to_add"/>
-
     <ScrollView
         android:id="@+id/widgets_table_scroll_view"
         android:layout_width="match_parent"
diff --git a/res/layout/widgets_list_row_header.xml b/res/layout/widgets_list_row_header.xml
index ed3a042..598041c 100644
--- a/res/layout/widgets_list_row_header.xml
+++ b/res/layout/widgets_list_row_header.xml
@@ -56,7 +56,8 @@
             android:layout_height="wrap_content"
             android:ellipsize="end"
             android:maxLines="1"
-            android:textColor="?android:attr/textColorTertiary"
+            android:textColor="?android:attr/textColorSecondary"
+            android:alpha="0.7"
             tools:text="m widgets, n shortcuts" />
 
     </LinearLayout>
diff --git a/res/values-night/styles.xml b/res/values-night/styles.xml
index 510e1f4..07a5096 100644
--- a/res/values-night/styles.xml
+++ b/res/values-night/styles.xml
@@ -21,6 +21,8 @@
 
     <style name="AppItemActivityTheme" parent="@android:style/Theme.DeviceDefault.Dialog.Alert">
         <item name="widgetsTheme">@style/WidgetContainerTheme.Dark</item>
+        <item name="android:windowBackground">@drawable/add_item_dialog_background</item>
+        <item name="android:windowNoTitle">true</item>
     </style>
 
 </resources>
\ No newline at end of file
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 9d6c936..cf830c7 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -138,6 +138,12 @@
     <dimen name="shortcut_preview_padding_right">0dp</dimen>
     <dimen name="shortcut_preview_padding_top">0dp</dimen>
 
+<!-- Pin widget dialog -->
+    <dimen name="pin_widget_button_padding_horizontal">8dp</dimen>
+    <dimen name="pin_widget_button_padding_vertical">4dp</dimen>
+    <dimen name="pin_widget_button_inset_horizontal">4dp</dimen>
+    <dimen name="pin_widget_button_inset_vertical">6dp</dimen>
+
 <!-- Dragging -->
     <!-- Drag padding to add to the bottom of drop targets -->
     <dimen name="drop_target_drag_padding">14dp</dimen>
@@ -185,7 +191,7 @@
 
 <!-- Deep shortcuts -->
     <dimen name="deep_shortcuts_elevation">0dp</dimen>
-    <dimen name="bg_popup_item_width">234dp</dimen>
+    <dimen name="bg_popup_item_width">216dp</dimen>
     <dimen name="bg_popup_item_height">56dp</dimen>
     <dimen name="pre_drag_view_scale">6dp</dimen>
     <!-- an icon with shortcuts must be dragged this far before the container is removed. -->
@@ -277,4 +283,7 @@
 <!-- Taskbar related (placeholders to compile in Launcher3 without Quickstep) -->
     <dimen name="taskbar_size">0dp</dimen>
 
+    <!-- Size of the maximum radius for the enforced rounded rectangles. -->
+    <dimen name="enforced_rounded_corner_max_radius">16dp</dimen>
+
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 1eb123b..7c372830 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -269,8 +269,6 @@
     <string name="app_waiting_download_title"><xliff:g id="name" example="Messenger">%1$s</xliff:g> waiting to install</string>
 
     <!-- Strings for widgets & more in the popup container/bottom sheet -->
-    <!-- Title for a bottom sheet that shows widgets for a particular app -->
-    <string name="widgets_bottom_sheet_title"><xliff:g id="name" example="Messenger">%1$s</xliff:g> widgets</string>
 
     <!-- Accessibility title for the popup containing a list of widgets. [CHAR_LIMIT=50] -->
     <string name="widgets_list">Widgets list</string>
diff --git a/res/values/styles.xml b/res/values/styles.xml
index adc2238..a27cdac 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -145,6 +145,8 @@
 
     <style name="AppItemActivityTheme" parent="@android:style/Theme.DeviceDefault.Light.Dialog.Alert">
         <item name="widgetsTheme">@style/WidgetContainerTheme</item>
+        <item name="android:windowBackground">@drawable/add_item_dialog_background</item>
+        <item name="android:windowNoTitle">true</item>
     </style>
 
     <style name="HomeSettingsTheme" parent="@android:style/Theme.DeviceDefault.Settings">
@@ -281,4 +283,8 @@
         <item name="android:colorControlHighlight">#DFE1E5</item>
         <item name="android:colorForeground">@color/all_apps_bg_hand_fill_dark</item>
     </style>
+
+    <style name="Widget.DeviceDefault.Button.Rounded.Colored" parent="@android:style/Widget.DeviceDefault.Button.Colored">
+        <item name="android:background">@drawable/add_item_dialog_button_background</item>
+    </style>
 </resources>
diff --git a/src/com/android/launcher3/AppWidgetResizeFrame.java b/src/com/android/launcher3/AppWidgetResizeFrame.java
index d02efb0..ab91785 100644
--- a/src/com/android/launcher3/AppWidgetResizeFrame.java
+++ b/src/com/android/launcher3/AppWidgetResizeFrame.java
@@ -14,12 +14,15 @@
 import android.content.Context;
 import android.graphics.Point;
 import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.GradientDrawable;
 import android.os.Bundle;
 import android.util.AttributeSet;
 import android.util.SizeF;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
+import android.widget.ImageView;
 
 import androidx.annotation.Nullable;
 
@@ -166,6 +169,15 @@
         DragLayer dl = launcher.getDragLayer();
         AppWidgetResizeFrame frame = (AppWidgetResizeFrame) launcher.getLayoutInflater()
                 .inflate(R.layout.app_widget_resize_frame, dl, false);
+        if (widget.hasEnforcedCornerRadius()) {
+            float enforcedCornerRadius = widget.getEnforcedCornerRadius();
+            ImageView imageView = frame.findViewById(R.id.widget_resize_frame);
+            Drawable d = imageView.getDrawable();
+            if (d instanceof GradientDrawable) {
+                GradientDrawable gd = (GradientDrawable) d.mutate();
+                gd.setCornerRadius(enforcedCornerRadius);
+            }
+        }
         frame.setupForWidget(widget, cellLayout, dl);
         ((DragLayer.LayoutParams) frame.getLayoutParams()).customPosition = true;
 
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index af4a843..4049ed6 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -29,8 +29,6 @@
 
 import androidx.annotation.Nullable;
 
-import com.android.launcher3.util.MultiValueAlpha;
-
 import java.util.function.Consumer;
 
 /**
@@ -38,10 +36,6 @@
  */
 public class Hotseat extends CellLayout implements Insettable {
 
-    private static final int ALPHA_INDEX_STATE = 0;
-    private static final int ALPHA_INDEX_REPLACE_TASKBAR = 1;
-    private static final int NUM_ALPHA_CHANNELS = 2;
-
     // Ratio of empty space, qsb should take up to appear visually centered.
     public static final float QSB_CENTER_FACTOR = .325f;
 
@@ -52,10 +46,12 @@
     @Nullable
     private Consumer<Boolean> mOnVisibilityAggregatedCallback;
 
-    private final MultiValueAlpha mMultiValueAlpha;
     private final View mQsb;
     private final int mQsbHeight;
 
+    private final View mTaskbarView;
+    private final int mTaskbarViewHeight;
+
     public Hotseat(Context context) {
         this(context, null);
     }
@@ -66,12 +62,15 @@
 
     public Hotseat(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
-        mMultiValueAlpha = new MultiValueAlpha(this, NUM_ALPHA_CHANNELS, MultiValueAlpha.Mode.MAX);
-        mMultiValueAlpha.setUpdateVisibility(true);
 
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
         mQsbHeight = mQsb.getLayoutParams().height;
         addView(mQsb);
+
+        mTaskbarView = LayoutInflater.from(context).inflate(R.layout.taskbar_view, this, false);
+        mTaskbarViewHeight = mTaskbarView.getLayoutParams().height;
+        // We want taskbar in the back so its background applies to Hotseat as well.
+        addView(mTaskbarView, 0);
     }
 
     /**
@@ -193,6 +192,8 @@
         int width = getShortcutsAndWidgets().getMeasuredWidth();
         mQsb.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
                 MeasureSpec.makeMeasureSpec(mQsbHeight, MeasureSpec.EXACTLY));
+        mTaskbarView.measure(MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.EXACTLY),
+                MeasureSpec.makeMeasureSpec(mTaskbarViewHeight, MeasureSpec.EXACTLY));
     }
 
     @Override
@@ -212,6 +213,13 @@
                 - (dp.isTaskbarPresent ? dp.taskbarSize : dp.getInsets().bottom);
         int top = bottom - mQsbHeight;
         mQsb.layout(left, top, right, bottom);
+
+        int taskbarWidth = mTaskbarView.getMeasuredWidth();
+        left = (r - l - taskbarWidth) / 2;
+        right = left + taskbarWidth;
+        bottom = b - t;
+        top = bottom - mTaskbarViewHeight;
+        mTaskbarView.layout(left, top, right, bottom);
     }
 
     /**
@@ -221,12 +229,11 @@
         return mWorkspace.getFirstMatch(new CellLayout[] { this }, itemOperator);
     }
 
-    public MultiValueAlpha.AlphaProperty getStateAlpha() {
-        return mMultiValueAlpha.getProperty(ALPHA_INDEX_STATE);
-    }
-
-    public MultiValueAlpha.AlphaProperty getReplaceTaskbarAlpha() {
-        return mMultiValueAlpha.getProperty(ALPHA_INDEX_REPLACE_TASKBAR);
+    /**
+     * Sets the alpha value of just our ShortcutAndWidgetContainer.
+     */
+    public void setIconsAlpha(float alpha) {
+        getShortcutsAndWidgets().setAlpha(alpha);
     }
 
     /**
@@ -235,4 +242,11 @@
     public View getQsb() {
         return mQsb;
     }
+
+    /**
+     * Returns the Taskbar inside hotseat
+     */
+    public View getTaskbarView() {
+        return mTaskbarView;
+    }
 }
diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index e9a3495..06bc438 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -176,21 +176,12 @@
         return launcher.getNormalOverviewScaleAndOffset();
     }
 
-    public ScaleAndTranslation getQsbScaleAndTranslation(Launcher launcher) {
-        return new ScaleAndTranslation(NO_SCALE, NO_OFFSET, NO_OFFSET);
-    }
-
     public float getOverviewFullscreenProgress() {
         return 0;
     }
 
     public int getVisibleElements(Launcher launcher) {
-        DeviceProfile deviceProfile = launcher.getDeviceProfile();
-        int flags = WORKSPACE_PAGE_INDICATOR | VERTICAL_SWIPE_INDICATOR | TASKBAR;
-        if (!deviceProfile.isTaskbarPresent) {
-            flags |= HOTSEAT_ICONS;
-        }
-        return flags;
+        return HOTSEAT_ICONS | WORKSPACE_PAGE_INDICATOR | VERTICAL_SWIPE_INDICATOR | TASKBAR;
     }
 
     /**
diff --git a/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java b/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
index 412754e..6db7a75 100644
--- a/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
+++ b/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
@@ -54,7 +54,6 @@
 import com.android.launcher3.graphics.WorkspaceDragScrim;
 import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.util.DynamicResource;
-import com.android.launcher3.util.MultiValueAlpha;
 import com.android.systemui.plugins.ResourceProvider;
 
 /**
@@ -96,7 +95,6 @@
         ScaleAndTranslation scaleAndTranslation = state.getWorkspaceScaleAndTranslation(mLauncher);
         ScaleAndTranslation hotseatScaleAndTranslation = state.getHotseatScaleAndTranslation(
                 mLauncher);
-        ScaleAndTranslation qsbScaleAndTranslation = state.getQsbScaleAndTranslation(mLauncher);
         mNewScale = scaleAndTranslation.scale;
         PageAlphaProvider pageAlphaProvider = state.getWorkspacePageAlphaProvider(mLauncher);
         final int childCount = mWorkspace.getChildCount();
@@ -135,8 +133,8 @@
             }
 
             float hotseatIconsAlpha = (elements & HOTSEAT_ICONS) != 0 ? 1 : 0;
-            propertySetter.setFloat(hotseat.getStateAlpha(), MultiValueAlpha.VALUE,
-                    hotseatIconsAlpha, config.getInterpolator(ANIM_HOTSEAT_FADE, fadeInterpolator));
+            propertySetter.setViewAlpha(hotseat, hotseatIconsAlpha,
+                    config.getInterpolator(ANIM_HOTSEAT_FADE, fadeInterpolator));
             float workspacePageIndicatorAlpha = (elements & WORKSPACE_PAGE_INDICATOR) != 0 ? 1 : 0;
             propertySetter.setViewAlpha(mLauncher.getWorkspace().getPageIndicator(),
                     workspacePageIndicatorAlpha, fadeInterpolator);
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 96251f0..7f76d27 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -215,6 +215,9 @@
     public static final BooleanFlag ENABLE_SPLIT_SELECT = getDebugFlag(
             "ENABLE_SPLIT_SELECT", false, "Uses new split screen selection overview UI");
 
+    public static final BooleanFlag ENABLE_ENFORCED_ROUNDED_CORNERS = new DeviceFlag(
+            "ENABLE_ENFORCED_ROUNDED_CORNERS", true, "Enforce rounded corners on all App Widgets");
+
     public static void initialize(Context context) {
         synchronized (sDebugFlags) {
             for (DebugFlag flag : sDebugFlags) {
diff --git a/src/com/android/launcher3/dragndrop/AddItemActivity.java b/src/com/android/launcher3/dragndrop/AddItemActivity.java
index 7bc9865..b7a7366 100644
--- a/src/com/android/launcher3/dragndrop/AddItemActivity.java
+++ b/src/com/android/launcher3/dragndrop/AddItemActivity.java
@@ -37,11 +37,14 @@
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
+import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.DragShadowBuilder;
 import android.view.View.OnLongClickListener;
 import android.view.View.OnTouchListener;
+import android.view.WindowManager;
+import android.widget.TextView;
 
 import com.android.launcher3.BaseActivity;
 import com.android.launcher3.InvariantDeviceProfile;
@@ -127,6 +130,9 @@
         if (savedInstanceState == null) {
             logCommand(LAUNCHER_ADD_EXTERNAL_ITEM_START);
         }
+
+        TextView widgetAppName = findViewById(R.id.widget_appName);
+        widgetAppName.setText(getApplicationInfo().labelRes);
     }
 
     @Override
@@ -326,4 +332,15 @@
                 .withItemInfo((ItemInfo) mWidgetCell.getWidgetView().getTag())
                 .log(command);
     }
+
+    @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        View view = getWindow().getDecorView();
+        WindowManager.LayoutParams layoutParams =
+                (WindowManager.LayoutParams) view.getLayoutParams();
+        layoutParams.gravity = Gravity.BOTTOM;
+        layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
+        getWindowManager().updateViewLayout(view, layoutParams);
+    }
 }
diff --git a/src/com/android/launcher3/dragndrop/AppWidgetHostViewDrawable.java b/src/com/android/launcher3/dragndrop/AppWidgetHostViewDrawable.java
index 92ae670..5cd95dc 100644
--- a/src/com/android/launcher3/dragndrop/AppWidgetHostViewDrawable.java
+++ b/src/com/android/launcher3/dragndrop/AppWidgetHostViewDrawable.java
@@ -17,8 +17,12 @@
 
 import android.graphics.Canvas;
 import android.graphics.ColorFilter;
+import android.graphics.Outline;
 import android.graphics.Paint;
+import android.graphics.Path;
 import android.graphics.PixelFormat;
+import android.graphics.Rect;
+import android.graphics.RectF;
 import android.graphics.drawable.Drawable;
 
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
@@ -28,14 +32,30 @@
 
     private final LauncherAppWidgetHostView mAppWidgetHostView;
     private Paint mPaint = new Paint();
+    private final Path mClipPath;
 
     public AppWidgetHostViewDrawable(LauncherAppWidgetHostView appWidgetHostView) {
         mAppWidgetHostView = appWidgetHostView;
+        Path clipPath = null;
+        if (appWidgetHostView.getClipToOutline()) {
+            Outline outline = new Outline();
+            mAppWidgetHostView.getOutlineProvider().getOutline(mAppWidgetHostView, outline);
+            Rect rect = new Rect();
+            if (outline.getRect(rect)) {
+                float radius = outline.getRadius();
+                clipPath = new Path();
+                clipPath.addRoundRect(new RectF(rect), radius, radius, Path.Direction.CCW);
+            }
+        }
+        mClipPath = clipPath;
     }
 
     @Override
     public void draw(Canvas canvas) {
         int saveCount = canvas.saveLayer(0, 0, getIntrinsicWidth(), getIntrinsicHeight(), mPaint);
+        if (mClipPath != null) {
+            canvas.clipPath(mClipPath);
+        }
         mAppWidgetHostView.draw(canvas);
         canvas.restoreToCount(saveCount);
     }
diff --git a/src/com/android/launcher3/dragndrop/DragLayer.java b/src/com/android/launcher3/dragndrop/DragLayer.java
index 7a6b4f9..419c3f1 100644
--- a/src/com/android/launcher3/dragndrop/DragLayer.java
+++ b/src/com/android/launcher3/dragndrop/DragLayer.java
@@ -110,6 +110,8 @@
         mDragController = dragController;
         recreateControllers();
 
+        mOverviewScrim.setup();
+
         mWorkspaceDragScrim = new WorkspaceDragScrim((this));
         mWorkspaceDragScrim.setWorkspace(workspace);
 
@@ -118,8 +120,6 @@
         mRootView = (LauncherRootView) getParent();
         mSysUiScrim = new SysUiScrim(mRootView);
         mRootView.setSysUiScrim(mSysUiScrim);
-
-
     }
 
     @Override
@@ -555,7 +555,6 @@
     public void setInsets(Rect insets) {
         super.setInsets(insets);
         mSysUiScrim.onInsetsChanged(insets, mAllowSysuiScrims);
-        mOverviewScrim.onInsetsChanged(insets);
     }
 
     public WorkspaceDragScrim getWorkspaceDragScrim() {
diff --git a/src/com/android/launcher3/graphics/OverviewScrim.java b/src/com/android/launcher3/graphics/OverviewScrim.java
index c0c3e5e..53303db 100644
--- a/src/com/android/launcher3/graphics/OverviewScrim.java
+++ b/src/com/android/launcher3/graphics/OverviewScrim.java
@@ -18,10 +18,6 @@
 
 import static android.view.View.VISIBLE;
 
-import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
-import static com.android.launcher3.LauncherState.OVERVIEW;
-
-import android.graphics.Rect;
 import android.util.FloatProperty;
 import android.view.View;
 import android.view.ViewGroup;
@@ -55,15 +51,15 @@
 
     public OverviewScrim(View view) {
         super(view);
-        mStableScrimmedView = mCurrentScrimmedView = mLauncher.getOverviewPanel();
 
         onExtractedColorsChanged(mWallpaperColorInfo);
     }
 
-    public void onInsetsChanged(Rect insets) {
-        mStableScrimmedView = (OVERVIEW.getVisibleElements(mLauncher) & HOTSEAT_ICONS) != 0
-                ? mLauncher.getHotseat()
-                : mLauncher.getOverviewPanel();
+    /**
+     * Initializes once view hierarchy is established.
+     */
+    public void setup() {
+        mStableScrimmedView = mCurrentScrimmedView = mLauncher.getOverviewPanel();
     }
 
     public void updateCurrentScrimmedView(ViewGroup root) {
diff --git a/src/com/android/launcher3/states/HintState.java b/src/com/android/launcher3/states/HintState.java
index fd1d965..eb2c551 100644
--- a/src/com/android/launcher3/states/HintState.java
+++ b/src/com/android/launcher3/states/HintState.java
@@ -53,10 +53,4 @@
     public ScaleAndTranslation getWorkspaceScaleAndTranslation(Launcher launcher) {
         return new ScaleAndTranslation(0.92f, 0, 0);
     }
-
-    @Override
-    public ScaleAndTranslation getQsbScaleAndTranslation(Launcher launcher) {
-        // Treat the QSB as part of the hotseat so they move together.
-        return getHotseatScaleAndTranslation(launcher);
-    }
 }
diff --git a/src/com/android/launcher3/states/SpringLoadedState.java b/src/com/android/launcher3/states/SpringLoadedState.java
index fce8fff..d593013 100644
--- a/src/com/android/launcher3/states/SpringLoadedState.java
+++ b/src/com/android/launcher3/states/SpringLoadedState.java
@@ -59,10 +59,11 @@
 
         float scale = grid.workspaceSpringLoadShrinkFactor;
         Rect insets = launcher.getDragLayer().getInsets();
+        int insetsBottom = grid.isTaskbarPresent ? grid.taskbarSize : insets.bottom;
 
         float scaledHeight = scale * ws.getNormalChildHeight();
         float shrunkTop = insets.top + grid.dropTargetBarSizePx;
-        float shrunkBottom = ws.getMeasuredHeight() - insets.bottom
+        float shrunkBottom = ws.getMeasuredHeight() - insetsBottom
                 - grid.workspacePadding.bottom
                 - grid.workspaceSpringLoadedBottomSpace;
         float totalShrunkSpace = shrunkBottom - shrunkTop;
diff --git a/src/com/android/launcher3/views/ActivityContext.java b/src/com/android/launcher3/views/ActivityContext.java
index 505c6ce..71aa4ac 100644
--- a/src/com/android/launcher3/views/ActivityContext.java
+++ b/src/com/android/launcher3/views/ActivityContext.java
@@ -18,6 +18,7 @@
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.graphics.Rect;
+import android.view.LayoutInflater;
 import android.view.View.AccessibilityDelegate;
 
 import com.android.launcher3.DeviceProfile;
@@ -67,13 +68,28 @@
     }
 
     /**
+     * Returns a LayoutInflater that is cloned in this Context, so that Views inflated by it will
+     * have the same Context. (i.e. {@link #lookupContext(Context)} will find this ActivityContext.)
+     */
+    default LayoutInflater getLayoutInflater() {
+        if (this instanceof Context) {
+            Context context = (Context) this;
+            return LayoutInflater.from(context).cloneInContext(context);
+        }
+        return null;
+    }
+
+    /**
      * The root view to support drag-and-drop and popup support.
      */
     BaseDragLayer getDragLayer();
 
     DeviceProfile getDeviceProfile();
 
-    static <T extends ActivityContext> T lookupContext(Context context) {
+    /**
+     * Returns the ActivityContext associated with the given Context.
+     */
+    static <T extends Context & ActivityContext> T lookupContext(Context context) {
         if (context instanceof ActivityContext) {
             return (T) context;
         } else if (context instanceof ContextWrapper) {
diff --git a/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java b/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
index 5c18faf..2e542ed 100644
--- a/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
@@ -20,6 +20,7 @@
 import android.content.Context;
 import android.content.res.Configuration;
 import android.graphics.Canvas;
+import android.graphics.Outline;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.os.Handler;
@@ -32,12 +33,14 @@
 import android.view.View;
 import android.view.ViewDebug;
 import android.view.ViewGroup;
+import android.view.ViewOutlineProvider;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.widget.AdapterView;
 import android.widget.Advanceable;
 import android.widget.RemoteViews;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
 
 import com.android.launcher3.CheckLongPressHelper;
 import com.android.launcher3.Launcher;
@@ -95,6 +98,18 @@
     private final Rect mWidgetSizeAtDrag = new Rect();
     private final RectF mTempRectF = new RectF();
     private final boolean mIsRtl;
+    private final Rect mEnforcedRectangle = new Rect();
+    private final float mEnforcedCornerRadius;
+    private final ViewOutlineProvider mCornerRadiusEnforcementOutline = new ViewOutlineProvider() {
+        @Override
+        public void getOutline(View view, Outline outline) {
+            if (mEnforcedRectangle.isEmpty() || mEnforcedCornerRadius <= 0) {
+                outline.setEmpty();
+            } else {
+                outline.setRoundRect(mEnforcedRectangle, mEnforcedCornerRadius);
+            }
+        }
+    };
 
     public LauncherAppWidgetHostView(Context context) {
         super(context);
@@ -112,6 +127,8 @@
         mIsRtl = Utilities.isRtl(context.getResources());
         mColorExtractor = LocalColorExtractor.newInstance(getContext());
         mColorExtractor.setListener(this);
+
+        mEnforcedCornerRadius = RoundedCornerEnforcement.computeEnforcedRadius(getContext());
     }
 
     @Override
@@ -169,7 +186,7 @@
         if (viewGroup instanceof AdapterView) {
             return true;
         } else {
-            for (int i=0; i < viewGroup.getChildCount(); i++) {
+            for (int i = 0; i < viewGroup.getChildCount(); i++) {
                 View child = viewGroup.getChildAt(i);
                 if (child instanceof ViewGroup) {
                     if (checkScrollableRecursively((ViewGroup) child)) {
@@ -272,6 +289,8 @@
             int pageId = mWorkspace.getPageIndexForScreenId(info.screenId);
             updateColorExtraction(mCurrentWidgetSize, pageId);
         }
+
+        enforceRoundedCorners();
     }
 
     /** Starts the drag mode. */
@@ -469,4 +488,39 @@
         }
         return false;
     }
+
+    @UiThread
+    private void resetRoundedCorners() {
+        setOutlineProvider(ViewOutlineProvider.BACKGROUND);
+        setClipToOutline(false);
+    }
+
+    @UiThread
+    private void enforceRoundedCorners() {
+        if (mEnforcedCornerRadius <= 0 || !RoundedCornerEnforcement.isRoundedCornerEnabled(this)) {
+            resetRoundedCorners();
+            return;
+        }
+        View background = RoundedCornerEnforcement.findBackground(this);
+        if (RoundedCornerEnforcement.hasAppWidgetOptedOut(this, background)) {
+            resetRoundedCorners();
+            return;
+        }
+        RoundedCornerEnforcement.computeRoundedRectangle(this,
+                background,
+                mEnforcedRectangle);
+        setOutlineProvider(mCornerRadiusEnforcementOutline);
+        setClipToOutline(true);
+    }
+
+    /** Returns the corner radius currently enforced, in pixels. */
+    public float getEnforcedCornerRadius() {
+        return mEnforcedCornerRadius;
+    }
+
+    /** Returns true if the corner radius are enforced for this App Widget. */
+    public boolean hasEnforcedCornerRadius() {
+        return getClipToOutline();
+    }
+
 }
diff --git a/src/com/android/launcher3/widget/RoundedCornerEnforcement.java b/src/com/android/launcher3/widget/RoundedCornerEnforcement.java
new file mode 100644
index 0000000..99eccd1
--- /dev/null
+++ b/src/com/android/launcher3/widget/RoundedCornerEnforcement.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+package com.android.launcher3.widget;
+
+import android.appwidget.AppWidgetHostView;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Rect;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.IdRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.config.FeatureFlags;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Utilities to compute the enforced the use of rounded corners on App Widgets.
+ */
+public class RoundedCornerEnforcement {
+    // This class is only a namespace and not meant to be instantiated.
+    private RoundedCornerEnforcement() {
+    }
+
+    /**
+     * Find the background view for a widget.
+     *
+     * @param appWidget the view containing the App Widget (typically the instance of
+     * {@link AppWidgetHostView}).
+     */
+    @Nullable
+    public static View findBackground(@NonNull View appWidget) {
+        List<View> backgrounds = findViewsWithId(appWidget, android.R.id.background);
+        if (backgrounds.size() == 1) {
+            return backgrounds.get(0);
+        }
+        // Really, the argument should contain the widget, so it cannot be the background.
+        if (appWidget instanceof ViewGroup) {
+            ViewGroup vg = (ViewGroup) appWidget;
+            if (vg.getChildCount() > 0) {
+                return findUndefinedBackground(vg.getChildAt(0));
+            }
+        }
+        return appWidget;
+    }
+
+    /**
+     * Check whether the app widget has opted out of the enforcement.
+     */
+    public static boolean hasAppWidgetOptedOut(@NonNull View appWidget, @NonNull View background) {
+        return background.getId() == android.R.id.background && background.getClipToOutline();
+    }
+
+    /** Check if the app widget is in the deny list. */
+    public static boolean isRoundedCornerEnabled(@NonNull View view) {
+        if (!Utilities.ATLEAST_S || !FeatureFlags.ENABLE_ENFORCED_ROUNDED_CORNERS.get()) {
+            return false;
+        }
+        // Here we need to test if the view's component is in the (to be created) deny list.
+        return true;
+    }
+
+    /**
+     * Computes the rounded rectangle needed for this app widget.
+     *
+     * @param appWidget View onto which the rounded rectangle will be applied.
+     * @param background Background view. This must be either {@code appWidget} or a descendant
+     *                  of {@code appWidget}.
+     * @param outRect Rectangle set to the rounded rectangle coordinates, in the reference frame
+     *                of {@code appWidget}.
+     */
+    public static void computeRoundedRectangle(@NonNull View appWidget, @NonNull View background,
+            @NonNull Rect outRect) {
+        outRect.left = 0;
+        outRect.right = background.getWidth();
+        outRect.top = 0;
+        outRect.bottom = background.getHeight();
+        while (background != appWidget) {
+            outRect.offset(background.getLeft(), background.getTop());
+            background = (View) background.getParent();
+        }
+    }
+
+    /**
+     * Computes the radius of the rounded rectangle that should be applied to a widget expanded
+     * in the given context.
+     */
+    public static float computeEnforcedRadius(@NonNull Context context) {
+        if (!Utilities.ATLEAST_S) {
+            return 0;
+        }
+        Resources res = context.getResources();
+        float systemRadius = res.getDimension(android.R.dimen.system_app_widget_background_radius);
+        float defaultRadius = res.getDimension(R.dimen.enforced_rounded_corner_max_radius);
+        return Math.min(defaultRadius, systemRadius);
+    }
+
+    private static List<View> findViewsWithId(View view, @IdRes int viewId) {
+        List<View> output = new ArrayList<>();
+        accumulateViewsWithId(view, viewId, output);
+        return output;
+    }
+
+    // Traverse views. If the predicate returns true, continue on the children, otherwise, don't.
+    private static void accumulateViewsWithId(View view, @IdRes int viewId, List<View> output) {
+        if (view.getId() == viewId) {
+            output.add(view);
+            return;
+        }
+        if (view instanceof ViewGroup) {
+            ViewGroup vg = (ViewGroup) view;
+            for (int i = 0; i < vg.getChildCount(); i++) {
+                accumulateViewsWithId(vg.getChildAt(i), viewId, output);
+            }
+        }
+    }
+
+    private static boolean isViewVisible(View view) {
+        if (view.getVisibility() != View.VISIBLE) {
+            return false;
+        }
+        return !view.willNotDraw() || view.getForeground() != null || view.getBackground() != null;
+    }
+
+    @Nullable
+    private static View findUndefinedBackground(View current) {
+        if (current.getVisibility() != View.VISIBLE) {
+            return null;
+        }
+        if (isViewVisible(current)) {
+            return current;
+        }
+        View lastVisibleView = null;
+        // Find the first view that is either not a ViewGroup, or a ViewGroup which will draw
+        // something, or a ViewGroup that contains more than one view.
+        if (current instanceof ViewGroup) {
+            ViewGroup vg = (ViewGroup) current;
+            for (int i = 0; i < vg.getChildCount(); i++) {
+                View visibleView = findUndefinedBackground(vg.getChildAt(i));
+                if (visibleView != null) {
+                    if (lastVisibleView != null) {
+                        return current; // At least two visible children
+                    }
+                    lastVisibleView = visibleView;
+                }
+            }
+        }
+        return lastVisibleView;
+    }
+}
diff --git a/src/com/android/launcher3/widget/WidgetsBottomSheet.java b/src/com/android/launcher3/widget/WidgetsBottomSheet.java
index 267f9f7..2fda86c 100644
--- a/src/com/android/launcher3/widget/WidgetsBottomSheet.java
+++ b/src/com/android/launcher3/widget/WidgetsBottomSheet.java
@@ -119,8 +119,7 @@
 
     public void populateAndShow(ItemInfo itemInfo) {
         mOriginalItemInfo = itemInfo;
-        ((TextView) findViewById(R.id.title)).setText(getContext().getString(
-                R.string.widgets_bottom_sheet_title, mOriginalItemInfo.title));
+        ((TextView) findViewById(R.id.title)).setText(mOriginalItemInfo.title);
 
         onWidgetsBound();
         attachToContainer();