diff --git a/quickstep/res/values/strings.xml b/quickstep/res/values/strings.xml
index 761934e..4f30791 100644
--- a/quickstep/res/values/strings.xml
+++ b/quickstep/res/values/strings.xml
@@ -231,20 +231,20 @@
     <string name="accessibility_rotate_button">Rotate screen</string>
 
     <!-- ******* Taskbar Edu ******* -->
-    <!-- Accessibility title for the taskbar education window. [CHAR_LIMIT=NONE] -->
+    <!-- Accessibility title for the Taskbar education window. [CHAR_LIMIT=NONE] -->
     <string name="taskbar_edu_a11y_title">Taskbar education</string>
-    <!-- Accessibility text spoken when the taskbar education panel appears [CHAR_LIMIT=NONE] -->
+    <!-- Accessibility text spoken when the Taskbar education panel appears [CHAR_LIMIT=NONE] -->
     <string name="taskbar_edu_opened">Taskbar education appeared</string>
-    <!-- Accessibility text spoken when the taskbar education panel disappears [CHAR_LIMIT=NONE] -->
+    <!-- Accessibility text spoken when the Taskbar education panel disappears [CHAR_LIMIT=NONE] -->
     <string name="taskbar_edu_closed">Taskbar education closed</string>
-    <!-- Text in dialog that lets a user know how they can use the taskbar to use multiple apps at once on their device. [CHAR_LIMIT=60] -->
+    <!-- Text in dialog that lets a user know how they can use the Taskbar to use multiple apps at once on their device. [CHAR_LIMIT=60] -->
     <string name="taskbar_edu_splitscreen">Drag an app to the side to use 2 apps at once</string>
-    <!-- Text in dialog that lets a user know how they can show the taskbar on their device. [CHAR_LIMIT=60] -->
-    <string name="taskbar_edu_stashing">Short swipe up to show the taskbar</string>
-    <!-- Text in dialog that lets a user know how the taskbar suggests apps based on their usage. [CHAR_LIMIT=60] -->
+    <!-- Text in dialog that lets a user know how they can show the Taskbar on their device. [CHAR_LIMIT=60] -->
+    <string name="taskbar_edu_stashing">Slow swipe up to show the Taskbar</string>
+    <!-- Text in dialog that lets a user know how the Taskbar suggests apps based on their usage. [CHAR_LIMIT=60] -->
     <string name="taskbar_edu_suggestions">Get app suggestions based on your routine</string>
-    <!-- Title in dialog that shows a user what they can do with the taskbar. [CHAR_LIMIT=60] -->
-    <string name="taskbar_edu_features">Do more with the taskbar</string>
+    <!-- Title in dialog that shows a user what they can do with the Taskbar. [CHAR_LIMIT=60] -->
+    <string name="taskbar_edu_features">Do more with the Taskbar</string>
     <!-- Text on button to go to the next screen of a tutorial [CHAR_LIMIT=16] -->
     <string name="taskbar_edu_next">Next</string>
     <!-- Text on button to go to the previous screen of a tutorial [CHAR_LIMIT=16] -->
@@ -267,13 +267,13 @@
     <string name="taskbar_button_notifications">Notifications</string>
     <!-- Content description for quick settings button [CHAR_LIMIT=16] -->
     <string name="taskbar_button_quick_settings">Quick Settings</string>
-    <!-- Accessibility title for the taskbar window. [CHAR_LIMIT=NONE] -->
+    <!-- Accessibility title for the Taskbar window. [CHAR_LIMIT=NONE] -->
     <string name="taskbar_a11y_title">Taskbar</string>
-    <!-- Accessibility title for the taskbar window on phones. [CHAR_LIMIT=NONE] -->
+    <!-- Accessibility title for the Taskbar window on phones. [CHAR_LIMIT=NONE] -->
     <string name="taskbar_phone_a11y_title">Navigation bar</string>
 
-    <!-- Label for moving drop target to the top or left side of the screen, depending on orientation (from the taskbar only). -->
+    <!-- Label for moving drop target to the top or left side of the screen, depending on orientation (from the Taskbar only). -->
     <string name="move_drop_target_top_or_left">Move to top&#47;left</string>
-    <!-- Label for moving drop target to the bottom or right side of the screen, depending on orientation (from the taskbar only). -->
+    <!-- Label for moving drop target to the bottom or right side of the screen, depending on orientation (from the Taskbar only). -->
     <string name="move_drop_target_bottom_or_right">Move to bottom&#47;right</string>
 </resources>
diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index 7948ca4..b880a7e 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -89,6 +89,7 @@
 import android.util.Pair;
 import android.util.Size;
 import android.view.CrossWindowBlurListeners;
+import android.view.IRemoteAnimationFinishedCallback;
 import android.view.RemoteAnimationAdapter;
 import android.view.RemoteAnimationDefinition;
 import android.view.RemoteAnimationTarget;
@@ -114,6 +115,7 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.icons.FastBitmapDrawable;
+import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.shortcuts.DeepShortcutView;
 import com.android.launcher3.statehandlers.DepthController;
 import com.android.launcher3.taskbar.LauncherTaskbarUIController;
@@ -143,6 +145,9 @@
 import com.android.quickstep.util.WorkspaceRevealAnim;
 import com.android.quickstep.views.FloatingWidgetView;
 import com.android.quickstep.views.RecentsView;
+import com.android.systemui.animation.ActivityLaunchAnimator;
+import com.android.systemui.animation.DelegateLaunchAnimatorController;
+import com.android.systemui.animation.RemoteAnimationDelegate;
 import com.android.systemui.shared.system.BlurUtils;
 import com.android.systemui.shared.system.InteractionJankMonitorWrapper;
 import com.android.systemui.shared.system.QuickStepContract;
@@ -222,7 +227,6 @@
     private RemoteAnimationProvider mRemoteAnimationProvider;
     // Strong refs to runners which are cleared when the launcher activity is destroyed
     private RemoteAnimationFactory mWallpaperOpenRunner;
-    private RemoteAnimationFactory mAppLaunchRunner;
     private RemoteAnimationFactory mKeyguardGoingAwayRunner;
 
     private RemoteAnimationFactory mWallpaperOpenTransitionRunner;
@@ -291,9 +295,18 @@
     public ActivityOptionsWrapper getActivityLaunchOptions(View v) {
         boolean fromRecents = isLaunchingFromRecents(v, null /* targets */);
         RunnableList onEndCallback = new RunnableList();
-        mAppLaunchRunner = new AppLaunchAnimationRunner(v, onEndCallback);
+
+        RemoteAnimationFactory delegateRunner = new AppLaunchAnimationRunner(v, onEndCallback);
+        ItemInfo tag = (ItemInfo) v.getTag();
+        if (tag != null && tag.shouldUseBackgroundAnimation()) {
+            ContainerAnimationRunner containerAnimationRunner =
+                    ContainerAnimationRunner.from(v, mStartingWindowListener);
+            if (containerAnimationRunner != null) {
+                delegateRunner = containerAnimationRunner;
+            }
+        }
         RemoteAnimationRunnerCompat runner = new LauncherAnimationRunner(
-                mHandler, mAppLaunchRunner, true /* startAtFrontOfQueue */);
+                mHandler, delegateRunner, true /* startAtFrontOfQueue */);
 
         // Note that this duration is a guess as we do not know if the animation will be a
         // recents launch or not for sure until we know the opening app targets.
@@ -1160,7 +1173,6 @@
             // Also clear strong references to the runners registered with the remote animation
             // definition so we don't have to wait for the system gc
             mWallpaperOpenRunner = null;
-            mAppLaunchRunner = null;
             mKeyguardGoingAwayRunner = null;
         }
     }
@@ -1754,6 +1766,79 @@
         }
     }
 
+    /** Remote animation runner to launch an app using System UI's animation library. */
+    private static class ContainerAnimationRunner implements RemoteAnimationFactory {
+
+        /** The delegate runner that handles the actual animation. */
+        private final RemoteAnimationDelegate<IRemoteAnimationFinishedCallback> mDelegate;
+
+        private ContainerAnimationRunner(
+                RemoteAnimationDelegate<IRemoteAnimationFinishedCallback> delegate) {
+            mDelegate = delegate;
+        }
+
+        @Nullable
+        private static ContainerAnimationRunner from(
+                View v, StartingWindowListener startingWindowListener) {
+            View viewToUse = findViewWithBackground(v);
+            if (viewToUse == null) {
+                viewToUse = v;
+            }
+
+            // TODO(b/265134143): create a CUJ type for interaction jank monitoring.
+            ActivityLaunchAnimator.Controller controllerDelegate =
+                    ActivityLaunchAnimator.Controller.fromView(viewToUse, null /* cujType */);
+
+            if (controllerDelegate == null) {
+                return null;
+            }
+
+            // This wrapper allows us to override the default value, telling the controller that the
+            // current window is below the animating window.
+            ActivityLaunchAnimator.Controller controller =
+                    new DelegateLaunchAnimatorController(controllerDelegate) {
+                        @Override
+                        public boolean isBelowAnimatingWindow() {
+                            return true;
+                        }
+                    };
+
+            ActivityLaunchAnimator.Callback callback = task -> ColorUtils.setAlphaComponent(
+                    startingWindowListener.getBackgroundColor(), 255);
+
+            return new ContainerAnimationRunner(
+                    new ActivityLaunchAnimator.AnimationDelegate(controller, callback));
+        }
+
+        /** Finds the closest parent of [view] (inclusive) with a background drawable. */
+        @Nullable
+        private static View findViewWithBackground(View view) {
+            View current = view;
+            while (current.getBackground() == null) {
+                if (!(current.getParent() instanceof View)) {
+                    return null;
+                }
+
+                current = (View) view.getParent();
+            }
+
+            return current;
+        }
+
+        @Override
+        public void onAnimationStart(int transit, RemoteAnimationTarget[] appTargets,
+                RemoteAnimationTarget[] wallpaperTargets, RemoteAnimationTarget[] nonAppTargets,
+                LauncherAnimationRunner.AnimationResult result) {
+            mDelegate.onAnimationStart(
+                    transit, appTargets, wallpaperTargets, nonAppTargets, result);
+        }
+
+        @Override
+        public void onAnimationCancelled(boolean isKeyguardOccluded) {
+            mDelegate.onAnimationCancelled(isKeyguardOccluded);
+        }
+    }
+
     /**
      * Class that holds all the variables for the app open animation.
      */
@@ -1822,8 +1907,9 @@
         }
     }
 
-    private static class StartingWindowListener extends IStartingWindowListener.Stub {
+    private class StartingWindowListener extends IStartingWindowListener.Stub {
         private QuickstepTransitionManager mTransitionManager;
+        private int mBackgroundColor;
 
         public void setTransitionManager(QuickstepTransitionManager transitionManager) {
             mTransitionManager = transitionManager;
@@ -1832,6 +1918,13 @@
         @Override
         public void onTaskLaunching(int taskId, int supportedType, int color) {
             mTransitionManager.mTaskStartParams.put(taskId, Pair.create(supportedType, color));
+            mBackgroundColor = color;
+        }
+
+        public int getBackgroundColor() {
+            return mBackgroundColor == Color.TRANSPARENT
+                    ? mLauncher.getScrimView().getBackgroundColor()
+                    : mBackgroundColor;
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/popup/QuickstepSystemShortcut.java b/quickstep/src/com/android/launcher3/popup/QuickstepSystemShortcut.java
index 45d1b11..184ea71 100644
--- a/quickstep/src/com/android/launcher3/popup/QuickstepSystemShortcut.java
+++ b/quickstep/src/com/android/launcher3/popup/QuickstepSystemShortcut.java
@@ -15,38 +15,14 @@
  */
 package com.android.launcher3.popup;
 
-import static com.android.launcher3.config.FeatureFlags.ENABLE_SPLIT_FROM_WORKSPACE_TO_WORKSPACE;
-import static com.android.launcher3.util.SplitConfigurationOptions.getLogEventForPosition;
-import static com.android.quickstep.util.SplitAnimationTimings.TABLET_HOME_TO_SPLIT;
-
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.content.Intent;
-import android.graphics.Bitmap;
-import android.graphics.Rect;
-import android.graphics.RectF;
-import android.graphics.drawable.BitmapDrawable;
-import android.graphics.drawable.Drawable;
-import android.util.Log;
 import android.view.View;
 
-import androidx.annotation.Nullable;
-
-import com.android.launcher3.AbstractFloatingView;
-import com.android.launcher3.R;
-import com.android.launcher3.anim.PendingAnimation;
-import com.android.launcher3.logging.StatsLogManager;
 import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.splitscreen.SplitShortcut;
 import com.android.launcher3.uioverrides.QuickstepLauncher;
 import com.android.launcher3.util.SplitConfigurationOptions.SplitPositionOption;
-import com.android.quickstep.util.SplitSelectStateController;
-import com.android.quickstep.views.FloatingTaskView;
-import com.android.quickstep.views.RecentsView;
-import com.android.systemui.shared.recents.model.Task;
 
-import java.util.function.Consumer;
-
+/** {@link SystemShortcut.Factory} implementation to create workspace split shortcuts */
 public interface QuickstepSystemShortcut {
 
     String TAG = QuickstepSystemShortcut.class.getSimpleName();
@@ -58,116 +34,12 @@
                         originalView, position);
     }
 
-    class SplitSelectSystemShortcut extends SystemShortcut<QuickstepLauncher> {
-
-        private final int mSplitPlaceholderSize;
-        private final int mSplitPlaceholderInset;
-
-        private final Rect mTempRect = new Rect();
-        private final SplitPositionOption mPosition;
+    class SplitSelectSystemShortcut extends SplitShortcut<QuickstepLauncher> {
 
         public SplitSelectSystemShortcut(QuickstepLauncher launcher, ItemInfo itemInfo,
                 View originalView, SplitPositionOption position) {
-            super(position.iconResId, position.textResId, launcher, itemInfo, originalView);
-
-            mPosition = position;
-
-            mSplitPlaceholderSize = launcher.getResources().getDimensionPixelSize(
-                    R.dimen.split_placeholder_size);
-            mSplitPlaceholderInset = launcher.getResources().getDimensionPixelSize(
-                    R.dimen.split_placeholder_inset);
-        }
-
-        @Override
-        public void onClick(View view) {
-            // Initiate splitscreen from the Home screen or Home All Apps
-            Bitmap bitmap;
-            Intent intent;
-            if (mItemInfo instanceof WorkspaceItemInfo) {
-                final WorkspaceItemInfo workspaceItemInfo = (WorkspaceItemInfo) mItemInfo;
-                bitmap = workspaceItemInfo.bitmap.icon;
-                intent = workspaceItemInfo.intent;
-            } else if (mItemInfo instanceof com.android.launcher3.model.data.AppInfo) {
-                final com.android.launcher3.model.data.AppInfo appInfo =
-                        (com.android.launcher3.model.data.AppInfo) mItemInfo;
-                bitmap = appInfo.bitmap.icon;
-                intent = appInfo.intent;
-            } else {
-                Log.e(TAG, "unknown item type");
-                return;
-            }
-
-            StatsLogManager.EventEnum splitEvent = getLogEventForPosition(mPosition.stagePosition);
-            RecentsView recentsView = mTarget.getOverviewPanel();
-            // Check if there is already an instance of this app running, if so, initiate the split
-            // using that.
-            recentsView.findLastActiveTaskAndRunCallback(
-                    intent.getComponent(),
-                    (Consumer<Task>) foundTask -> {
-                        SplitSelectSource source = new SplitSelectSource(mOriginalView,
-                                new BitmapDrawable(bitmap), intent, mPosition, mItemInfo,
-                                splitEvent, foundTask);
-                        if (ENABLE_SPLIT_FROM_WORKSPACE_TO_WORKSPACE.get()) {
-                            startSplitToHome(source);
-                        } else {
-                            recentsView.initiateSplitSelect(source);
-                        }
-                    }
-            );
-        }
-
-        private void startSplitToHome(SplitSelectSource source) {
-            AbstractFloatingView.closeAllOpenViews(mTarget);
-
-            SplitSelectStateController controller = mTarget.getSplitSelectStateController();
-            controller.setInitialTaskSelect(source.intent, source.position.stagePosition,
-                    source.itemInfo, source.splitEvent, source.alreadyRunningTask);
-
-            RecentsView recentsView = mTarget.getOverviewPanel();
-            recentsView.getPagedOrientationHandler().getInitialSplitPlaceholderBounds(
-                    mSplitPlaceholderSize, mSplitPlaceholderInset, mTarget.getDeviceProfile(),
-                    controller.getActiveSplitStagePosition(), mTempRect);
-
-            PendingAnimation anim = new PendingAnimation(TABLET_HOME_TO_SPLIT.getDuration());
-            RectF startingTaskRect = new RectF();
-            final FloatingTaskView floatingTaskView = FloatingTaskView.getFloatingTaskView(mTarget,
-                    source.view, null /* thumbnail */, source.drawable, startingTaskRect);
-            floatingTaskView.setAlpha(1);
-            floatingTaskView.addStagingAnimation(anim, startingTaskRect, mTempRect,
-                    false /* fadeWithThumbnail */, true /* isStagedTask */);
-            controller.setFirstFloatingTaskView(floatingTaskView);
-            anim.addListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationCancel(Animator animation) {
-                    mTarget.getDragLayer().removeView(floatingTaskView);
-                    controller.resetState();
-                }
-            });
-            anim.buildAnim().start();
-        }
-    }
-
-    class SplitSelectSource {
-
-        public final View view;
-        public final Drawable drawable;
-        public final Intent intent;
-        public final SplitPositionOption position;
-        public final ItemInfo itemInfo;
-        public final StatsLogManager.EventEnum splitEvent;
-        @Nullable
-        public final Task alreadyRunningTask;
-
-        public SplitSelectSource(View view, Drawable drawable, Intent intent,
-                SplitPositionOption position, ItemInfo itemInfo,
-                StatsLogManager.EventEnum splitEvent, @Nullable Task foundTask) {
-            this.view = view;
-            this.drawable = drawable;
-            this.intent = intent;
-            this.position = position;
-            this.itemInfo = itemInfo;
-            this.splitEvent = splitEvent;
-            this.alreadyRunningTask = foundTask;
+            super(position.iconResId, position.textResId, launcher, itemInfo, originalView,
+                    position);
         }
     }
 }
diff --git a/quickstep/src/com/android/launcher3/splitscreen/SplitShortcut.kt b/quickstep/src/com/android/launcher3/splitscreen/SplitShortcut.kt
new file mode 100644
index 0000000..20c8c44
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/splitscreen/SplitShortcut.kt
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2023 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.splitscreen
+
+import android.content.Context
+import android.content.Intent
+import android.graphics.Bitmap
+import android.graphics.drawable.BitmapDrawable
+import android.util.Log
+import android.view.View
+import com.android.launcher3.model.data.ItemInfo
+import com.android.launcher3.model.data.WorkspaceItemInfo
+import com.android.launcher3.popup.QuickstepSystemShortcut
+import com.android.launcher3.popup.SystemShortcut
+import com.android.launcher3.util.SplitConfigurationOptions
+import com.android.launcher3.util.SplitConfigurationOptions.SplitPositionOption
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource
+import com.android.launcher3.views.ActivityContext
+
+/**
+ * Shortcut to allow starting split. Default interaction for [onClick] is to launch
+ * split selection mode
+ */
+abstract class SplitShortcut<T>(
+    iconResId: Int,
+    labelResId: Int,
+    target: T,
+    itemInfo: ItemInfo?,
+    originalView: View?,
+    protected val position: SplitPositionOption
+) : SystemShortcut<T>(iconResId, labelResId, target, itemInfo, originalView) where
+T : Context?,
+T : ActivityContext? {
+    private val TAG = SystemShortcut::class.java.simpleName
+
+    // Initiate splitscreen from the Home screen or Home All Apps
+    protected val splitSelectSource: SplitSelectSource?
+        get() {
+            // Initiate splitscreen from the Home screen or Home All Apps
+            val bitmap: Bitmap
+            val intent: Intent
+            when (mItemInfo) {
+                is WorkspaceItemInfo -> {
+                    val workspaceItemInfo = mItemInfo
+                    bitmap = workspaceItemInfo.bitmap.icon
+                    intent = workspaceItemInfo.intent
+                }
+                is com.android.launcher3.model.data.AppInfo -> {
+                    val appInfo = mItemInfo
+                    bitmap = appInfo.bitmap.icon
+                    intent = appInfo.intent
+                }
+                else -> {
+                    Log.e(TAG, "unknown item type")
+                    return null
+                }
+            }
+            val splitEvent =
+                SplitConfigurationOptions.getLogEventForPosition(position.stagePosition)
+            return SplitSelectSource(
+                mOriginalView,
+                BitmapDrawable(bitmap),
+                intent,
+                position,
+                mItemInfo,
+                splitEvent
+            )
+        }
+
+    /** Starts split selection on the provided [mTarget] */
+    override fun onClick(view: View?) {
+        val splitSelectSource = splitSelectSource
+        if (splitSelectSource == null) {
+            Log.w(QuickstepSystemShortcut.TAG, "no split selection source")
+            return
+        }
+        mTarget!!.startSplitSelection(splitSelectSource)
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 8a5b2c5..accbf21 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -15,6 +15,7 @@
  */
 package com.android.launcher3.taskbar;
 
+import static android.app.ActivityTaskManager.INVALID_TASK_ID;
 import static android.content.pm.PackageManager.FEATURE_PC;
 import static android.os.Trace.TRACE_TAG_APP;
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
@@ -92,6 +93,7 @@
 import com.android.launcher3.util.NavigationMode;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.SettingsCache;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource;
 import com.android.launcher3.util.TraceHelper;
 import com.android.launcher3.util.ViewCache;
 import com.android.launcher3.views.ActivityContext;
@@ -754,6 +756,11 @@
         }
     }
 
+    @Override
+    public void startSplitSelection(SplitSelectSource splitSelectSource) {
+        mControllers.uiController.startSplitSelection(splitSelectSource);
+    }
+
     protected void onTaskbarIconClicked(View view) {
         Object tag = view.getTag();
         if (tag instanceof Task) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
index d9773d4..62f1293 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
@@ -125,7 +125,8 @@
                     mControllers.taskbarDragController.setDisallowLongClick(disallowLongClick);
                     mControllers.taskbarAllAppsController.setDisallowGlobalDrag(disallowGlobalDrag);
                     mControllers.taskbarAllAppsController.setDisallowLongClick(disallowLongClick);
-                    mControllers.taskbarPopupController.setHideSplitOptions(disallowGlobalDrag);
+                    mControllers.taskbarPopupController.setAllowInitialSplitSelection(
+                            disallowGlobalDrag);
                 }
             };
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java
index 9b27c9d..30d6eb4 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java
@@ -17,11 +17,9 @@
 
 import static com.android.launcher3.util.SplitConfigurationOptions.getLogEventForPosition;
 
-import android.content.ClipDescription;
 import android.content.Intent;
 import android.content.pm.LauncherApps;
 import android.graphics.Point;
-import android.os.Bundle;
 import android.util.Pair;
 import android.view.MotionEvent;
 import android.view.View;
@@ -46,6 +44,7 @@
 import com.android.launcher3.popup.PopupLiveUpdateHandler;
 import com.android.launcher3.popup.SystemShortcut;
 import com.android.launcher3.shortcuts.DeepShortcutView;
+import com.android.launcher3.splitscreen.SplitShortcut;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.LauncherBindableItemsContainer;
 import com.android.launcher3.util.PackageUserKey;
@@ -75,7 +74,7 @@
 
     // Initialized in init.
     private TaskbarControllers mControllers;
-    private boolean mHideSplitOptions;
+    private boolean mAllowInitialSplitSelection;
 
     public TaskbarPopupController(TaskbarActivityContext context) {
         mContext = context;
@@ -101,8 +100,8 @@
         mPopupDataProvider.setDeepShortcutMap(deepShortcutMapCopy);
     }
 
-    public void setHideSplitOptions(boolean hideSplitOptions) {
-        mHideSplitOptions = hideSplitOptions;
+    public void setAllowInitialSplitSelection(boolean allowInitialSplitSelection) {
+        mAllowInitialSplitSelection = allowInitialSplitSelection;
     }
 
     private void updateNotificationDots(Predicate<PackageUserKey> updatedDots) {
@@ -188,13 +187,9 @@
     }
 
     // Create a Stream of all applicable system shortcuts
-    // TODO(b/227800345): Add "Split bottom" option when tablet is in portrait mode.
     private Stream<SystemShortcut.Factory> getSystemShortcuts() {
         // concat a Stream of split options with a Stream of APP_INFO
         Stream<SystemShortcut.Factory> appInfo = Stream.of(APP_INFO);
-        if (mHideSplitOptions) {
-            return appInfo;
-        }
 
         return Stream.concat(
                 Utilities.getSplitPositionOptions(mContext.getDeviceProfile())
@@ -261,7 +256,7 @@
     private SystemShortcut.Factory<BaseTaskbarContext> createSplitShortcutFactory(
             SplitPositionOption position) {
         return (context, itemInfo, originalView) -> new TaskbarSplitShortcut(context, itemInfo,
-                originalView, position);
+                originalView, position, mAllowInitialSplitSelection);
     }
 
      /**
@@ -269,32 +264,43 @@
      * from the taskbar, as if the user performed a drag and drop split.
      * Includes an onClick method that initiates the actual split.
      */
-    private static class TaskbarSplitShortcut extends SystemShortcut<BaseTaskbarContext> {
-        private final SplitPositionOption mPosition;
+    private static class TaskbarSplitShortcut extends
+             SplitShortcut<BaseTaskbarContext> {
+         /**
+          * If {@code true}, clicking this shortcut will not attempt to start a split app directly,
+          * but be the first app in split selection mode
+          */
+         private final boolean mAllowInitialSplitSelection;
 
-        TaskbarSplitShortcut(BaseTaskbarContext context, ItemInfo itemInfo, View originalView,
-                SplitPositionOption position) {
-            super(position.iconResId, position.textResId, context, itemInfo, originalView);
-            mPosition = position;
-        }
+         TaskbarSplitShortcut(BaseTaskbarContext context, ItemInfo itemInfo, View originalView,
+                SplitPositionOption position, boolean allowInitialSplitSelection) {
+             super(position.iconResId, position.textResId, context, itemInfo, originalView,
+                     position);
+             mAllowInitialSplitSelection = allowInitialSplitSelection;
+         }
 
         @Override
         public void onClick(View view) {
+            AbstractFloatingView.closeAllOpenViews(mTarget);
+             if (mAllowInitialSplitSelection) {
+                 super.onClick(view);
+                 return;
+             }
+
             // Initiate splitscreen from the in-app Taskbar or Taskbar All Apps
             Pair<InstanceId, com.android.launcher3.logging.InstanceId> instanceIds =
                     LogUtils.getShellShareableInstanceId();
             mTarget.getStatsLogManager().logger()
                     .withItemInfo(mItemInfo)
                     .withInstanceId(instanceIds.second)
-                    .log(getLogEventForPosition(mPosition.stagePosition));
+                    .log(getLogEventForPosition(getPosition().stagePosition));
 
-            AbstractFloatingView.closeAllOpenViews(mTarget);
             if (mItemInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
                 WorkspaceItemInfo workspaceItemInfo = (WorkspaceItemInfo) mItemInfo;
                 SystemUiProxy.INSTANCE.get(mTarget).startShortcut(
                         workspaceItemInfo.getIntent().getPackage(),
                         workspaceItemInfo.getDeepShortcutId(),
-                        mPosition.stagePosition,
+                        getPosition().stagePosition,
                         null,
                         workspaceItemInfo.user,
                         instanceIds.first);
@@ -305,7 +311,7 @@
                                 null,
                                 mItemInfo.user),
                         new Intent(),
-                        mPosition.stagePosition,
+                        getPosition().stagePosition,
                         null,
                         instanceIds.first);
             }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index ef79b8e..999db3b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -184,12 +184,13 @@
             flags -> {
                 boolean inApp = hasAnyFlag(flags, FLAGS_IN_APP);
                 boolean stashedInApp = hasAnyFlag(flags, FLAGS_STASHED_IN_APP);
+                boolean stashedSysUIState = hasAnyFlag(flags, FLAG_STASHED_IN_SYSUI_STATE);
                 boolean stashedLauncherState = hasAnyFlag(flags, FLAG_IN_STASHED_LAUNCHER_STATE);
                 boolean stashedInTaskbarAllApps =
                         hasAnyFlag(flags, FLAG_STASHED_IN_TASKBAR_ALL_APPS);
                 boolean stashedForSmallScreen = hasAnyFlag(flags, FLAG_STASHED_SMALL_SCREEN);
                 return (inApp && stashedInApp) || (!inApp && stashedLauncherState)
-                        || stashedInTaskbarAllApps || stashedForSmallScreen;
+                        || stashedInTaskbarAllApps || stashedForSmallScreen || stashedSysUIState;
             });
 
     public TaskbarStashController(TaskbarActivityContext activity) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index ebb37a8..1c11bf7 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.taskbar;
 
+import static android.app.ActivityTaskManager.INVALID_TASK_ID;
+
 import android.content.Intent;
 import android.graphics.drawable.BitmapDrawable;
 import android.view.MotionEvent;
@@ -26,6 +28,7 @@
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.ItemInfoWithIcon;
 import com.android.launcher3.util.DisplayController;
+import com.android.launcher3.util.SplitConfigurationOptions;
 import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskView;
 import com.android.systemui.shared.recents.model.Task;
@@ -165,6 +168,23 @@
         return null;
     }
 
+    public void startSplitSelection(SplitConfigurationOptions.SplitSelectSource splitSelectSource) {
+        RecentsView recentsView = getRecentsView();
+        if (recentsView == null) {
+            return;
+        }
+        recentsView.findLastActiveTaskAndRunCallback(
+                splitSelectSource.intent.getComponent(),
+                (Consumer<Task>) foundTask -> {
+                    splitSelectSource.alreadyRunningTaskId = foundTask == null
+                            ? INVALID_TASK_ID
+                            : foundTask.key.id;
+                    splitSelectSource.animateCurrentTaskDismissal = foundTask != null;
+                    recentsView.initiateSplitSelect(splitSelectSource);
+                }
+        );
+    }
+
     /**
      * Uses the clicked Taskbar icon to launch a second app for splitscreen.
      */
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 2fcd64b..db584d8 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -15,8 +15,9 @@
  */
 package com.android.launcher3.taskbar;
 
+import static android.content.pm.PackageManager.FEATURE_PC;
+
 import android.content.Context;
-import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Rect;
@@ -81,6 +82,9 @@
     // Only non-null when device supports having an All Apps button.
     private @Nullable View mAllAppsButton;
 
+    // Only non-null when device supports having an All Apps button.
+    private @Nullable View mTaskbarDivider;
+
     private View mQsb;
 
     public TaskbarView(@NonNull Context context) {
@@ -119,13 +123,16 @@
 
         mThemeIconsBackground = calculateThemeIconsBackground();
 
-        if (FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()) {
+        if (FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()
+                && !mActivityContext.getPackageManager().hasSystemFeature(FEATURE_PC)) {
             mAllAppsButton = LayoutInflater.from(context)
                     .inflate(R.layout.taskbar_all_apps_button, this, false);
             mAllAppsButton.setPadding(mItemPadding, mItemPadding, mItemPadding, mItemPadding);
             mAllAppsButton.setScaleX(mIsRtl ? -1 : 1);
-            if (mActivityContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_PC)) {
-                mAllAppsButton.setVisibility(GONE);
+
+            if (FeatureFlags.ENABLE_TASKBAR_PINNING.get()) {
+                mTaskbarDivider = LayoutInflater.from(context).inflate(R.layout.taskbar_divider,
+                        this, false);
             }
         }
 
@@ -159,6 +166,9 @@
         if (mAllAppsButton != null) {
             mAllAppsButton.setOnClickListener(mControllerCallbacks.getAllAppsButtonClickListener());
         }
+        if (mTaskbarDivider != null) {
+            //TODO(b/265434705): set long press listener
+        }
     }
 
     private void removeAndRecycle(View view) {
@@ -180,6 +190,10 @@
 
         if (mAllAppsButton != null) {
             removeView(mAllAppsButton);
+
+            if (mTaskbarDivider != null) {
+                removeView(mTaskbarDivider);
+            }
         }
         removeView(mQsb);
 
@@ -256,8 +270,11 @@
         }
 
         if (mAllAppsButton != null) {
-            int index = mIsRtl ? getChildCount() : 0;
-            addView(mAllAppsButton, index);
+            addView(mAllAppsButton, mIsRtl ? getChildCount() : 0);
+
+            if (mTaskbarDivider != null) {
+                addView(mTaskbarDivider, mIsRtl ? (getChildCount() - 1) : 1);
+            }
         }
         if (mActivityContext.getDeviceProfile().isQsbInline) {
             addView(mQsb, mIsRtl ? getChildCount() : 0);
@@ -328,6 +345,11 @@
                 int qsbTop = (bottom - top - deviceProfile.hotseatQsbHeight) / 2;
                 int qsbBottom = qsbTop + deviceProfile.hotseatQsbHeight;
                 child.layout(qsbStart, qsbTop, qsbEnd, qsbBottom);
+            } else if (child == mTaskbarDivider) {
+                iconEnd += mItemMarginLeftRight;
+                int iconStart = iconEnd - mIconTouchSize;
+                child.layout(iconStart, mIconLayoutBounds.top, iconEnd, mIconLayoutBounds.bottom);
+                iconEnd = iconStart + mItemMarginLeftRight;
             } else {
                 iconEnd -= mItemMarginLeftRight;
                 int iconStart = iconEnd - mIconTouchSize;
diff --git a/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayContext.java b/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayContext.java
index d7a0b03..3edb375 100644
--- a/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayContext.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.taskbar.overlay;
 
+import static android.app.ActivityTaskManager.INVALID_TASK_ID;
+
 import android.content.Context;
 import android.view.View;
 
@@ -28,7 +30,13 @@
 import com.android.launcher3.taskbar.TaskbarControllers;
 import com.android.launcher3.taskbar.TaskbarDragController;
 import com.android.launcher3.taskbar.TaskbarStashController;
+import com.android.launcher3.taskbar.TaskbarUIController;
 import com.android.launcher3.taskbar.allapps.TaskbarAllAppsContainerView;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource;
+import com.android.quickstep.views.RecentsView;
+import com.android.systemui.shared.recents.model.Task;
+
+import java.util.function.Consumer;
 
 /**
  * Window context for the taskbar overlays such as All Apps and EDU.
@@ -46,6 +54,7 @@
     // We automatically stash taskbar when All Apps is opened in gesture navigation mode.
     private final boolean mWillTaskbarBeVisuallyStashed;
     private final int mStashedTaskbarHeight;
+    private final TaskbarUIController mUiController;
 
     public TaskbarOverlayContext(
             Context windowContext,
@@ -61,6 +70,8 @@
         TaskbarStashController taskbarStashController = controllers.taskbarStashController;
         mWillTaskbarBeVisuallyStashed = taskbarStashController.supportsVisualStashing();
         mStashedTaskbarHeight = taskbarStashController.getStashedHeight();
+
+        mUiController = controllers.uiController;
     }
 
     boolean willTaskbarBeVisuallyStashed() {
@@ -111,6 +122,11 @@
     }
 
     @Override
+    public void startSplitSelection(SplitSelectSource splitSelectSource) {
+        mUiController.startSplitSelection(splitSelectSource);
+    }
+
+    @Override
     public DotInfo getDotInfoForItem(ItemInfo info) {
         return mTaskbarContext.getDotInfoForItem(info);
     }
diff --git a/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java b/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
index 30850b9..abbd01d 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
@@ -15,6 +15,7 @@
  */
 package com.android.launcher3.uioverrides;
 
+import static android.app.ActivityTaskManager.INVALID_TASK_ID;
 import static android.os.Trace.TRACE_TAG_APP;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_OPTIMIZE_MEASURE;
 import static android.view.accessibility.AccessibilityEvent.TYPE_VIEW_FOCUSED;
@@ -32,6 +33,7 @@
 import static com.android.launcher3.anim.Interpolators.EMPHASIZED;
 import static com.android.launcher3.compat.AccessibilityManagerCompat.sendCustomAccessibilityEvent;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_SPLIT_FROM_WORKSPACE;
+import static com.android.launcher3.config.FeatureFlags.ENABLE_SPLIT_FROM_WORKSPACE_TO_WORKSPACE;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_WIDGET_PICKER_DEPTH;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_APP_LAUNCH_TAP;
 import static com.android.launcher3.model.data.ItemInfo.NO_MATCHING_ID;
@@ -46,8 +48,11 @@
 import static com.android.launcher3.util.DisplayController.CHANGE_ACTIVE_SCREEN;
 import static com.android.launcher3.util.DisplayController.CHANGE_NAVIGATION_MODE;
 import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+import static com.android.quickstep.util.SplitAnimationTimings.TABLET_HOME_TO_SPLIT;
 import static com.android.systemui.shared.system.ActivityManagerWrapper.CLOSE_SYSTEM_WINDOWS_REASON_HOME_KEY;
 
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ValueAnimator;
 import android.app.ActivityManager;
@@ -57,6 +62,8 @@
 import android.content.IntentSender;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
+import android.graphics.Rect;
+import android.graphics.RectF;
 import android.hardware.SensorManager;
 import android.hardware.devicestate.DeviceStateManager;
 import android.media.permission.SafeCloseable;
@@ -80,6 +87,7 @@
 import androidx.annotation.Nullable;
 
 import com.android.app.viewcapture.ViewCapture;
+import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherSettings.Favorites;
@@ -92,6 +100,7 @@
 import com.android.launcher3.Workspace;
 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
 import com.android.launcher3.anim.AnimatorPlaybackController;
+import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.appprediction.PredictionRowView;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.DragOptions;
@@ -133,6 +142,7 @@
 import com.android.launcher3.util.PendingSplitSelectInfo;
 import com.android.launcher3.util.RunnableList;
 import com.android.launcher3.util.SplitConfigurationOptions.SplitPositionOption;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource;
 import com.android.launcher3.util.TouchController;
 import com.android.launcher3.widget.LauncherWidgetHolder;
 import com.android.quickstep.OverviewCommandHelper;
@@ -150,9 +160,11 @@
 import com.android.quickstep.util.SplitWithKeyboardShortcutController;
 import com.android.quickstep.util.TISBindHelper;
 import com.android.quickstep.views.DesktopTaskView;
+import com.android.quickstep.views.FloatingTaskView;
 import com.android.quickstep.views.OverviewActionsView;
 import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskView;
+import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.unfold.UnfoldSharedComponent;
 import com.android.systemui.unfold.UnfoldTransitionFactory;
@@ -168,6 +180,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
+import java.util.function.Consumer;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
 
@@ -362,7 +375,7 @@
         Stream<SystemShortcut.Factory> base = Stream.of(WellbeingModel.SHORTCUT_FACTORY);
         if (ENABLE_SPLIT_FROM_WORKSPACE.get() && mDeviceProfile.isTablet) {
             RecentsView recentsView = getOverviewPanel();
-            // TODO: Pull it out of PagedOrentationHandler for split from workspace.
+            // TODO(b/266482558): Pull it out of PagedOrentationHandler for split from workspace.
             List<SplitPositionOption> positions =
                     recentsView.getPagedOrientationHandler().getSplitPositionOptions(
                             mDeviceProfile);
@@ -549,6 +562,64 @@
     }
 
     @Override
+    public void startSplitSelection(SplitSelectSource splitSelectSource) {
+        RecentsView recentsView = getOverviewPanel();
+        // Check if there is already an instance of this app running, if so, initiate the split
+        // using that.
+        recentsView.findLastActiveTaskAndRunCallback(
+                splitSelectSource.intent.getComponent(),
+                (Consumer<Task>) foundTask -> {
+                    splitSelectSource.alreadyRunningTaskId = foundTask == null
+                            ? INVALID_TASK_ID
+                            : foundTask.key.id;
+                    if (ENABLE_SPLIT_FROM_WORKSPACE_TO_WORKSPACE.get()) {
+                        startSplitToHome(splitSelectSource);
+                    } else {
+                        recentsView.initiateSplitSelect(splitSelectSource);
+                    }
+                }
+        );
+    }
+
+    /** TODO(b/266482558) Migrate into SplitSelectStateController or someplace split specific. */
+    private void startSplitToHome(
+            SplitSelectSource source) {
+        AbstractFloatingView.closeAllOpenViews(this);
+        int splitPlaceholderSize = getResources().getDimensionPixelSize(
+                R.dimen.split_placeholder_size);
+        int splitPlaceholderInset = getResources().getDimensionPixelSize(
+                R.dimen.split_placeholder_inset);
+        Rect tempRect = new Rect();
+
+        SplitSelectStateController controller = getSplitSelectStateController();
+        controller.setInitialTaskSelect(source.intent, source.position.stagePosition,
+                source.itemInfo, source.splitEvent, source.alreadyRunningTaskId);
+
+        RecentsView recentsView = getOverviewPanel();
+        recentsView.getPagedOrientationHandler().getInitialSplitPlaceholderBounds(
+                splitPlaceholderSize, splitPlaceholderInset, getDeviceProfile(),
+                controller.getActiveSplitStagePosition(), tempRect);
+
+        PendingAnimation anim = new PendingAnimation(TABLET_HOME_TO_SPLIT.getDuration());
+        RectF startingTaskRect = new RectF();
+        final FloatingTaskView floatingTaskView = FloatingTaskView.getFloatingTaskView(this,
+                source.view, null /* thumbnail */, source.drawable, startingTaskRect);
+        floatingTaskView.setAlpha(1);
+        floatingTaskView.addStagingAnimation(anim, startingTaskRect, tempRect,
+                false /* fadeWithThumbnail */, true /* isStagedTask */);
+        controller.setFirstFloatingTaskView(floatingTaskView);
+        anim.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationCancel(Animator animation) {
+                getDragLayer().removeView(floatingTaskView);
+                controller.resetState();
+            }
+        });
+        anim.buildAnim().start();
+    }
+
+
+    @Override
     protected void onResume() {
         super.onResume();
 
diff --git a/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
index bcaae99..db6d56b 100644
--- a/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
+++ b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
@@ -34,9 +34,9 @@
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.logging.StatsLogManager;
-import com.android.launcher3.popup.QuickstepSystemShortcut;
 import com.android.launcher3.statemanager.StateManager.StateListener;
 import com.android.launcher3.util.SplitConfigurationOptions;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource;
 import com.android.quickstep.FallbackActivityInterface;
 import com.android.quickstep.GestureState;
 import com.android.quickstep.RecentsActivity;
@@ -269,7 +269,7 @@
     }
 
     @Override
-    public void initiateSplitSelect(QuickstepSystemShortcut.SplitSelectSource splitSelectSource) {
+    public void initiateSplitSelect(SplitSelectSource splitSelectSource) {
         super.initiateSplitSelect(splitSelectSource);
         mActivity.getStateManager().goToState(OVERVIEW_SPLIT_SELECT);
     }
diff --git a/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java b/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
index 681f068..e5d54d7 100644
--- a/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
+++ b/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
@@ -90,6 +90,8 @@
     private Intent mSecondTaskIntent;
     private int mSecondTaskId = INVALID_TASK_ID;
     private boolean mRecentsAnimationRunning;
+    /** If {@code true}, animates the existing task view split placeholder view */
+    private boolean mAnimateCurrentTaskDismissal;
     @Nullable
     private UserHandle mUser;
     /** If not null, this is the TaskView we want to launch from */
@@ -111,22 +113,15 @@
     }
 
     /**
-     * To be called after first task selected in Overview.
+     * @param alreadyRunningTask if set to {@link android.app.ActivityTaskManager#INVALID_TASK_ID}
+     *                           then @param intent will be used to launch the initial task
+     * @param intent will be ignored if @param alreadyRunningTask is set
      */
-    public void setInitialTaskSelect(Task task, @StagePosition int stagePosition,
-            StatsLogManager.EventEnum splitEvent, ItemInfo itemInfo) {
-        mInitialTaskId = task.key.id;
-        setInitialData(stagePosition, splitEvent, itemInfo);
-    }
-
-    /**
-     * To be called after first task selected from home or all apps.
-     */
-    public void setInitialTaskSelect(Intent intent, @StagePosition int stagePosition,
+    public void setInitialTaskSelect(@Nullable Intent intent, @StagePosition int stagePosition,
             @NonNull ItemInfo itemInfo, StatsLogManager.EventEnum splitEvent,
-            @Nullable Task alreadyRunningTask) {
-        if (alreadyRunningTask != null) {
-            mInitialTaskId = alreadyRunningTask.key.id;
+            int alreadyRunningTask) {
+        if (alreadyRunningTask != INVALID_TASK_ID) {
+            mInitialTaskId = alreadyRunningTask;
         } else {
             mInitialTaskIntent = intent;
             mUser = itemInfo.user;
@@ -348,6 +343,14 @@
         return null;
     }
 
+    public boolean isAnimateCurrentTaskDismissal() {
+        return mAnimateCurrentTaskDismissal;
+    }
+
+    public void setAnimateCurrentTaskDismissal(boolean animateCurrentTaskDismissal) {
+        mAnimateCurrentTaskDismissal = animateCurrentTaskDismissal;
+    }
+
     /**
      * Requires Shell Transitions
      */
@@ -454,6 +457,7 @@
         mLaunchingTaskView = null;
         mItemInfo = null;
         mSplitEvent = null;
+        mAnimateCurrentTaskDismissal = false;
     }
 
     /**
diff --git a/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java b/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java
index 74e4acc..ca4365f 100644
--- a/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java
+++ b/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java
@@ -22,27 +22,23 @@
 import android.animation.RectEvaluator;
 import android.content.ComponentName;
 import android.content.Context;
-import android.graphics.Color;
 import android.graphics.Matrix;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.util.Log;
 import android.view.Surface;
 import android.view.SurfaceControl;
-import android.view.SurfaceSession;
 import android.view.View;
 import android.window.PictureInPictureSurfaceTransaction;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
-import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimationSuccessListener;
-import com.android.launcher3.anim.Interpolators;
-import com.android.launcher3.util.Themes;
 import com.android.quickstep.TaskAnimationManager;
 import com.android.systemui.shared.pip.PipSurfaceTransactionHelper;
 import com.android.systemui.shared.system.InteractionJankMonitorWrapper;
+import com.android.wm.shell.pip.PipContentOverlay;
 
 /**
  * Subclass of {@link RectFSpringAnim} that animates an Activity to PiP (picture-in-picture) window
@@ -65,7 +61,10 @@
     private final Rect mDestinationBounds = new Rect();
     private final PipSurfaceTransactionHelper mSurfaceTransactionHelper;
 
-    /** for calculating transform in {@link #onAnimationUpdate(AppCloseConfig, RectF, float)} */
+    /**
+     * For calculating transform in
+     * {@link #onAnimationUpdate(SurfaceControl.Transaction, RectF, float)}
+     */
     private final RectEvaluator mInsetsEvaluator = new RectEvaluator(new Rect());
     private final Rect mSourceHintRectInsets;
     private final Rect mSourceInsets = new Rect();
@@ -144,31 +143,17 @@
             mSourceRectHint.setEmpty();
             mSourceHintRectInsets = null;
 
-            // Create a new overlay layer
-            SurfaceSession session = new SurfaceSession();
-            mContentOverlay = new SurfaceControl.Builder(session)
-                    .setCallsite("SwipePipToHomeAnimator")
-                    .setName("PipContentOverlay")
-                    .setColorLayer()
-                    .build();
-            SurfaceControl.Transaction t = new SurfaceControl.Transaction();
-            t.show(mContentOverlay);
-            t.setLayer(mContentOverlay, Integer.MAX_VALUE);
-            int color = Themes.getColorBackground(view.getContext());
-            float[] bgColor = new float[] {Color.red(color) / 255f, Color.green(color) / 255f,
-                    Color.blue(color) / 255f};
-            t.setColor(mContentOverlay, bgColor);
-            t.setAlpha(mContentOverlay, 0f);
-            t.reparent(mContentOverlay, mLeash);
-            t.apply();
-
+            // Create a new overlay layer. We do not call detach on this instance, it's propagated
+            // to other classes like PipTaskOrganizer / RecentsAnimationController to complete
+            // the cleanup.
+            final PipContentOverlay.PipColorOverlay overlay =
+                    new PipContentOverlay.PipColorOverlay(view.getContext());
+            final SurfaceControl.Transaction tx = new SurfaceControl.Transaction();
+            mContentOverlay = overlay.getLeash();
+            overlay.attach(tx, mLeash);
             addOnUpdateListener((currentRect, progress) -> {
-                float alpha = progress < 0.5f
-                        ? 0
-                        : Utilities.mapToRange(Math.min(progress, 1f), 0.5f, 1f,
-                                0f, 1f, Interpolators.FAST_OUT_SLOW_IN);
-                t.setAlpha(mContentOverlay, alpha);
-                t.apply();
+                overlay.onAnimationUpdate(tx, progress);
+                tx.apply();
             });
         } else {
             mSourceRectHint.set(sourceRectHint);
diff --git a/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java b/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java
index cf033a6..886fc80 100644
--- a/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java
@@ -34,13 +34,13 @@
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.logging.StatsLogManager;
-import com.android.launcher3.popup.QuickstepSystemShortcut;
 import com.android.launcher3.statehandlers.DepthController;
 import com.android.launcher3.statehandlers.DesktopVisibilityController;
 import com.android.launcher3.statemanager.StateManager.StateListener;
 import com.android.launcher3.uioverrides.QuickstepLauncher;
 import com.android.launcher3.util.PendingSplitSelectInfo;
 import com.android.launcher3.util.SplitConfigurationOptions;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource;
 import com.android.quickstep.LauncherActivityInterface;
 import com.android.quickstep.RotationTouchHelper;
 import com.android.quickstep.util.SplitSelectStateController;
@@ -199,7 +199,7 @@
     }
 
     @Override
-    public void initiateSplitSelect(QuickstepSystemShortcut.SplitSelectSource splitSelectSource) {
+    public void initiateSplitSelect(SplitSelectSource splitSelectSource) {
         super.initiateSplitSelect(splitSelectSource);
         mActivity.getStateManager().goToState(LauncherState.OVERVIEW_SPLIT_SELECT);
     }
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index cdc0574..8facb0a 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -16,6 +16,7 @@
 
 package com.android.quickstep.views;
 
+import static android.app.ActivityTaskManager.INVALID_TASK_ID;
 import static android.view.Surface.ROTATION_0;
 import static android.view.View.MeasureSpec.EXACTLY;
 import static android.view.View.MeasureSpec.makeMeasureSpec;
@@ -144,7 +145,6 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.icons.cache.HandlerRunnable;
 import com.android.launcher3.logging.StatsLogManager;
-import com.android.launcher3.popup.QuickstepSystemShortcut;
 import com.android.launcher3.statehandlers.DepthController;
 import com.android.launcher3.statemanager.BaseState;
 import com.android.launcher3.statemanager.StatefulActivity;
@@ -156,6 +156,7 @@
 import com.android.launcher3.util.ResourceBasedOverride.Overrides;
 import com.android.launcher3.util.RunnableList;
 import com.android.launcher3.util.SplitConfigurationOptions.SplitBounds;
+import com.android.launcher3.util.SplitConfigurationOptions.SplitSelectSource;
 import com.android.launcher3.util.SplitConfigurationOptions.StagePosition;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.TranslateEdgeEffect;
@@ -677,7 +678,7 @@
     private SplitInstructionsView mSplitInstructionsView;
 
     @Nullable
-    private QuickstepSystemShortcut.SplitSelectSource mSplitSelectSource;
+    private SplitSelectSource mSplitSelectSource;
 
     /**
      * Keeps track of the index of the TaskView that split screen was initialized with so we know
@@ -1607,8 +1608,9 @@
 
         // If we are entering Overview as a result of initiating a split from somewhere else
         // (e.g. split from Home), we need to make sure the staged app is not drawn as a thumbnail.
-        Task stagedTaskToBeRemovedFromGrid =
-                mSplitSelectSource != null ? mSplitSelectSource.alreadyRunningTask : null;
+        int stagedTaskIdToBeRemovedFromGrid = mSplitSelectSource != null
+                ? mSplitSelectSource.alreadyRunningTaskId
+                : INVALID_TASK_ID;
 
         // update the map of instance counts
         mFilterState.updateInstanceCountMap(taskGroups);
@@ -1617,8 +1619,8 @@
         // taskGroups backwards populates the thumbnail grid from least recent to most recent.
         for (int i = taskGroups.size() - 1; i >= 0; i--) {
             GroupTask groupTask = taskGroups.get(i);
-            boolean isRemovalNeeded = stagedTaskToBeRemovedFromGrid != null
-                    && groupTask.containsTask(stagedTaskToBeRemovedFromGrid.key.id);
+            boolean isRemovalNeeded = stagedTaskIdToBeRemovedFromGrid != INVALID_TASK_ID
+                    && groupTask.containsTask(stagedTaskIdToBeRemovedFromGrid);
 
             TaskView taskView;
             if (isRemovalNeeded && groupTask.hasMultipleTasks()) {
@@ -1632,7 +1634,7 @@
             addView(taskView);
 
             if (isRemovalNeeded && groupTask.hasMultipleTasks()) {
-                if (groupTask.task1.equals(stagedTaskToBeRemovedFromGrid)) {
+                if (groupTask.task1.key.id == stagedTaskIdToBeRemovedFromGrid) {
                     taskView.bind(groupTask.task2, mOrientationState);
                 } else {
                     taskView.bind(groupTask.task1, mOrientationState);
@@ -3019,7 +3021,7 @@
 
         RectF startingTaskRect = new RectF();
         safeRemoveDragLayerView(mFirstFloatingTaskView);
-        if (mSplitHiddenTaskView != null) {
+        if (mSplitSelectStateController.isAnimateCurrentTaskDismissal()) {
             // Create the split select animation from Overview
             mSplitHiddenTaskView.setThumbnailVisibility(INVISIBLE);
             anim.setViewAlpha(mSplitHiddenTaskView.getIconView(), 0, clampToProgress(LINEAR,
@@ -4393,29 +4395,38 @@
         initiateSplitSelect(taskView, defaultSplitPosition, LAUNCHER_OVERVIEW_ACTIONS_SPLIT);
     }
 
+    /** TODO(b/266477929): Consolidate this call w/ the one below */
     public void initiateSplitSelect(TaskView taskView, @StagePosition int stagePosition,
             StatsLogManager.EventEnum splitEvent) {
         mSplitHiddenTaskView = taskView;
-        mSplitSelectStateController.setInitialTaskSelect(taskView.getTask(),
-                stagePosition, splitEvent, taskView.getItemInfo());
+        mSplitSelectStateController.setInitialTaskSelect(null /*intent*/,
+                stagePosition, taskView.getItemInfo(), splitEvent, taskView.mTask.key.id);
+        mSplitSelectStateController.setAnimateCurrentTaskDismissal(
+                true /*animateCurrentTaskDismissal*/);
         mSplitHiddenTaskViewIndex = indexOfChild(taskView);
     }
 
     /**
-     * Called when staging a split from Home/AllApps, using the icon long-press menu.
+     * Called when staging a split from Home/AllApps/Overview (Taskbar),
+     * using the icon long-press menu.
+     * Attempts to initiate split with an existing taskView, if one exists
      */
-    public void initiateSplitSelect(QuickstepSystemShortcut.SplitSelectSource splitSelectSource) {
+    public void initiateSplitSelect(SplitSelectSource splitSelectSource) {
         mSplitSelectSource = splitSelectSource;
+        mSplitHiddenTaskView = getTaskViewByTaskId(splitSelectSource.alreadyRunningTaskId);
+        mSplitHiddenTaskViewIndex = indexOfChild(mSplitHiddenTaskView);
+        mSplitSelectStateController
+                .setAnimateCurrentTaskDismissal(splitSelectSource.animateCurrentTaskDismissal);
         mSplitSelectStateController.setInitialTaskSelect(splitSelectSource.intent,
                 splitSelectSource.position.stagePosition, splitSelectSource.itemInfo,
-                splitSelectSource.splitEvent, splitSelectSource.alreadyRunningTask);
+                splitSelectSource.splitEvent, splitSelectSource.alreadyRunningTaskId);
     }
 
     /**
      * Modifies a PendingAnimation with the animations for entering split staging
      */
     public void createSplitSelectInitAnimation(PendingAnimation builder, int duration) {
-        if (mSplitHiddenTaskView != null) {
+        if (mSplitSelectStateController.isAnimateCurrentTaskDismissal()) {
             // Splitting from Overview
             createTaskDismissAnimation(builder, mSplitHiddenTaskView, true, false, duration,
                     true /* dismissingForSplitSelection*/);
diff --git a/res/layout/taskbar_divider.xml b/res/layout/taskbar_divider.xml
new file mode 100644
index 0000000..e25e7a3
--- /dev/null
+++ b/res/layout/taskbar_divider.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2023 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.
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/taskbar_divider_container"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content">
+
+    <View
+        android:id="@+id/taskbar_divider_bar"
+        android:layout_height="32dp"
+        android:layout_width="2dp"
+        android:layout_gravity="center"
+        android:background="@drawable/bg_rounded_corner_bottom_sheet_handle" />
+    <!-- TODO(b/265347148): Create separate drawable -->
+</FrameLayout>
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index d041dfe..321aef5 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -93,6 +93,8 @@
     -->
     <dimen name="fastscroll_width">58dp</dimen>
     <dimen name="fastscroll_end_margin">-26dp</dimen>
+    <!-- Extra margin between bottom of the scrollbar and the search bar protection layer. -->
+    <dimen name="fastscroll_bottom_margin_floating_search">4dp</dimen>
 
     <!-- PagedView -->
     <dimen name="fling_threshold_velocity">500dp</dimen>
@@ -139,11 +141,6 @@
     <dimen name="arrow_toast_elevation">2dp</dimen>
     <dimen name="arrow_toast_arrow_width">10dp</dimen>
 
-    <!-- Search bar in All Apps -->
-    <dimen name="all_apps_header_max_elevation">3dp</dimen>
-    <dimen name="all_apps_header_scroll_to_elevation">16dp</dimen>
-    <dimen name="all_apps_header_shadow_height">6dp</dimen>
-
     <dimen name="all_apps_divider_margin_vertical">8dp</dimen>
 
     <!-- Floating action button inside work tab to toggle work profile -->
diff --git a/src/com/android/launcher3/FastScrollRecyclerView.java b/src/com/android/launcher3/FastScrollRecyclerView.java
index 2f927d3..3504b24 100644
--- a/src/com/android/launcher3/FastScrollRecyclerView.java
+++ b/src/com/android/launcher3/FastScrollRecyclerView.java
@@ -77,11 +77,15 @@
         return getPaddingTop();
     }
 
+    public int getScrollBarMarginBottom() {
+        return getPaddingBottom();
+    }
+
     /**
      * Returns the height of the fast scroll bar
      */
     public int getScrollbarTrackHeight() {
-        return mScrollbar.getHeight() - getScrollBarTop() - getPaddingBottom();
+        return mScrollbar.getHeight() - getScrollBarTop() - getScrollBarMarginBottom();
     }
 
     /**
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index 6ea331d..66ea616 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -30,6 +30,20 @@
 public class LauncherSettings {
 
     /**
+     * Types of animations.
+     */
+    public static final class Animation {
+        /**
+         * The default animation for a given view/item info type.
+         */
+        public static final int DEFAULT = 0;
+        /**
+         * An animation using the view's background.
+         */
+        public static final int VIEW_BACKGROUND = 1;
+    }
+
+    /**
      * Favorites.
      */
     public static final class Favorites implements BaseColumns {
diff --git a/src/com/android/launcher3/allapps/ActivityAllAppsContainerView.java b/src/com/android/launcher3/allapps/ActivityAllAppsContainerView.java
index 95e61b8..3bb8fb4 100644
--- a/src/com/android/launcher3/allapps/ActivityAllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/ActivityAllAppsContainerView.java
@@ -143,7 +143,7 @@
     private boolean mRebindAdaptersAfterSearchAnimation;
     private int mNavBarScrimHeight = 0;
     private SearchRecyclerView mSearchRecyclerView;
-    private SearchAdapterProvider<?> mMainAdapterProvider;
+    protected SearchAdapterProvider<?> mMainAdapterProvider;
     private View mBottomSheetHandleArea;
     private boolean mHasWorkApps;
     private float[] mBottomSheetCornerRadii;
@@ -202,9 +202,12 @@
     protected void initContent() {
         mMainAdapterProvider = createMainAdapterProvider();
 
-        mAH.set(AdapterHolder.MAIN, new AdapterHolder(AdapterHolder.MAIN));
-        mAH.set(AdapterHolder.WORK, new AdapterHolder(AdapterHolder.WORK));
-        mAH.set(SEARCH, new AdapterHolder(SEARCH));
+        mAH.set(AdapterHolder.MAIN, new AdapterHolder(AdapterHolder.MAIN,
+                new AlphabeticalAppsList<>(mActivityContext, mAllAppsStore, null)));
+        mAH.set(AdapterHolder.WORK, new AdapterHolder(AdapterHolder.WORK,
+                new AlphabeticalAppsList<>(mActivityContext, mAllAppsStore, mWorkManager)));
+        mAH.set(SEARCH, new AdapterHolder(SEARCH,
+                new AlphabeticalAppsList<>(mActivityContext, null, null)));
 
         getLayoutInflater().inflate(R.layout.all_apps_content, this);
         mHeader = findViewById(R.id.all_apps_header);
@@ -212,9 +215,9 @@
         mBottomSheetHandleArea = findViewById(R.id.bottom_sheet_handle_area);
         mSearchRecyclerView = findViewById(R.id.search_results_list_view);
 
-        // Add the search box next to the header
+        // Add the search box above everything else.
         mSearchContainer = inflateSearchBox();
-        addView(mSearchContainer, indexOfChild(mHeader) + 1);
+        addView(mSearchContainer);
         mSearchUiManager = (SearchUiManager) mSearchContainer;
     }
 
@@ -344,7 +347,7 @@
                 mAH.get(i).mRecyclerView.scrollToTop();
             }
         }
-        if (isHeaderVisible()) {
+        if (mHeader != null && mHeader.getVisibility() == VISIBLE) {
             mHeader.reset(animate);
         }
         // Reset the base recycler view after transitioning home.
@@ -466,6 +469,16 @@
         }
         setupHeader();
 
+        if (FeatureFlags.ENABLE_FLOATING_SEARCH_BAR.get()) {
+            // Keep the scroller above the search bar.
+            RelativeLayout.LayoutParams scrollerLayoutParams =
+                    (LayoutParams) findViewById(R.id.fast_scroller).getLayoutParams();
+            scrollerLayoutParams.addRule(RelativeLayout.ABOVE, R.id.search_container_all_apps);
+            scrollerLayoutParams.removeRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
+            scrollerLayoutParams.bottomMargin = getResources().getDimensionPixelSize(
+                    R.dimen.fastscroll_bottom_margin_floating_search);
+        }
+
         mAllAppsStore.registerIconContainer(mAH.get(AdapterHolder.MAIN).mRecyclerView);
         mAllAppsStore.registerIconContainer(mAH.get(AdapterHolder.WORK).mRecyclerView);
         mAllAppsStore.registerIconContainer(mAH.get(AdapterHolder.SEARCH).mRecyclerView);
@@ -627,10 +640,9 @@
         layoutParams.removeRule(RelativeLayout.ALIGN_PARENT_TOP);
     }
 
-    protected BaseAllAppsAdapter<T> createAdapter(AlphabeticalAppsList<T> appsList,
-            BaseAdapterProvider[] adapterProviders) {
+    protected BaseAllAppsAdapter<T> createAdapter(AlphabeticalAppsList<T> appsList) {
         return new AllAppsGridAdapter<>(mActivityContext, getLayoutInflater(), appsList,
-                adapterProviders);
+                mMainAdapterProvider);
     }
 
     // TODO(b/216683257): Remove when Taskbar All Apps supports search.
@@ -1001,10 +1013,6 @@
         return rv == null ? null : rv.getScrollbar();
     }
 
-    public boolean isHeaderVisible() {
-        return mHeader != null && mHeader.getVisibility() == View.VISIBLE;
-    }
-
     /**
      * Adds an update listener to animator that adds springs to the animation.
      */
@@ -1155,15 +1163,10 @@
         final Rect mPadding = new Rect();
         AllAppsRecyclerView mRecyclerView;
 
-        AdapterHolder(int type) {
+        AdapterHolder(int type, AlphabeticalAppsList<T> appsList) {
             mType = type;
-            mAppsList = new AlphabeticalAppsList<>(mActivityContext,
-                    isSearch() ? null : mAllAppsStore,
-                    isWork() ? mWorkManager : null);
-            BaseAdapterProvider[] adapterProviders =
-                    new BaseAdapterProvider[]{mMainAdapterProvider};
-
-            mAdapter = createAdapter(mAppsList, adapterProviders);
+            mAppsList = appsList;
+            mAdapter = createAdapter(mAppsList);
             mAppsList.setAdapter(mAdapter);
             mLayoutManager = mAdapter.getLayoutManager();
         }
diff --git a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
index 112d47e..866932a 100644
--- a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
+++ b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
@@ -29,6 +29,7 @@
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.recyclerview.widget.RecyclerView.Adapter;
 
+import com.android.launcher3.allapps.search.SearchAdapterProvider;
 import com.android.launcher3.util.ScrollableLayoutManager;
 import com.android.launcher3.views.ActivityContext;
 
@@ -73,8 +74,8 @@
 
 
     public AllAppsGridAdapter(T activityContext, LayoutInflater inflater,
-            AlphabeticalAppsList apps, BaseAdapterProvider[] adapterProviders) {
-        super(activityContext, inflater, apps, adapterProviders);
+            AlphabeticalAppsList apps, SearchAdapterProvider<?> adapterProvider) {
+        super(activityContext, inflater, apps, adapterProvider);
         mGridLayoutMgr = new AppsGridLayoutManager(mActivityContext);
         mGridLayoutMgr.setSpanSizeLookup(new GridSpanSizer());
         setAppsPerRow(activityContext.getDeviceProfile().numShownAllAppsColumns);
@@ -195,11 +196,9 @@
     public void setAppsPerRow(int appsPerRow) {
         mAppsPerRow = appsPerRow;
         int totalSpans = mAppsPerRow;
-        for (BaseAdapterProvider adapterProvider : mAdapterProviders) {
-            for (int itemPerRow : adapterProvider.getSupportedItemsPerRowArray()) {
-                if (totalSpans % itemPerRow != 0) {
-                    totalSpans *= itemPerRow;
-                }
+        for (int itemPerRow : mAdapterProvider.getSupportedItemsPerRowArray()) {
+            if (totalSpans % itemPerRow != 0) {
+                totalSpans *= itemPerRow;
             }
         }
         mGridLayoutMgr.setSpanCount(totalSpans);
@@ -226,9 +225,8 @@
             if (isIconViewType(viewType)) {
                 return totalSpans / mAppsPerRow;
             } else {
-                BaseAdapterProvider adapterProvider = getAdapterProvider(viewType);
-                if (adapterProvider != null) {
-                    return totalSpans / adapterProvider.getItemsPerRow(viewType, mAppsPerRow);
+                if (mAdapterProvider.isViewSupported(viewType)) {
+                    return totalSpans / mAdapterProvider.getItemsPerRow(viewType, mAppsPerRow);
                 }
 
                 // Section breaks span the full width
diff --git a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
index 7789191..6b45fe6 100644
--- a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
@@ -261,12 +261,19 @@
         }
     }
 
+    @Override
     public int getScrollBarTop() {
         return ActivityContext.lookupContext(getContext()).getAppsView().isSearchSupported()
                 ? getResources().getDimensionPixelOffset(R.dimen.all_apps_header_top_padding)
                 : 0;
     }
 
+    @Override
+    public int getScrollBarMarginBottom() {
+        return getRootWindowInsets() == null ? 0
+                : getRootWindowInsets().getSystemWindowInsetBottom();
+    }
+
     public RecyclerViewFastScroller getScrollbar() {
         return mScrollbar;
     }
diff --git a/src/com/android/launcher3/allapps/BaseAdapterProvider.java b/src/com/android/launcher3/allapps/BaseAdapterProvider.java
deleted file mode 100644
index 308294c..0000000
--- a/src/com/android/launcher3/allapps/BaseAdapterProvider.java
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * 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.allapps;
-
-import android.view.LayoutInflater;
-import android.view.ViewGroup;
-
-/**
- * A UI expansion wrapper providing for providing dynamic recyclerview items
- */
-public abstract class BaseAdapterProvider {
-
-    /**
-     * Returns whether or not viewType can be handled by searchProvider
-     */
-    public abstract boolean isViewSupported(int viewType);
-
-    /**
-     * Called from RecyclerView.Adapter#onBindViewHolder
-     */
-    public abstract void onBindView(AllAppsGridAdapter.ViewHolder holder, int position);
-
-    /**
-     * Called from RecyclerView.Adapter#onCreateViewHolder
-     */
-    public abstract AllAppsGridAdapter.ViewHolder onCreateViewHolder(LayoutInflater layoutInflater,
-            ViewGroup parent, int viewType);
-
-    /**
-     * Returns supported item per row combinations supported
-     */
-    public int[] getSupportedItemsPerRowArray() {
-        return new int[]{};
-    }
-
-    /**
-     * Returns how many cells a view should span
-     */
-    public int getItemsPerRow(int viewType, int appsPerRow) {
-        return appsPerRow;
-    }
-
-}
diff --git a/src/com/android/launcher3/allapps/BaseAllAppsAdapter.java b/src/com/android/launcher3/allapps/BaseAllAppsAdapter.java
index 42f8b0c..7040de5 100644
--- a/src/com/android/launcher3/allapps/BaseAllAppsAdapter.java
+++ b/src/com/android/launcher3/allapps/BaseAllAppsAdapter.java
@@ -27,18 +27,16 @@
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.R;
+import com.android.launcher3.allapps.search.SearchAdapterProvider;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.views.ActivityContext;
 
-import java.util.Arrays;
-
 /**
  * Adapter for all the apps.
  *
@@ -65,8 +63,7 @@
     public static final int VIEW_TYPE_MASK_DIVIDER = VIEW_TYPE_ALL_APPS_DIVIDER;
     public static final int VIEW_TYPE_MASK_ICON = VIEW_TYPE_ICON;
 
-
-    protected final BaseAdapterProvider[] mAdapterProviders;
+    protected final SearchAdapterProvider<?> mAdapterProvider;
 
     /**
      * ViewHolder for each icon.
@@ -146,7 +143,7 @@
     private final int mExtraHeight;
 
     public BaseAllAppsAdapter(T activityContext, LayoutInflater inflater,
-            AlphabeticalAppsList<T> apps, BaseAdapterProvider[] adapterProviders) {
+            AlphabeticalAppsList<T> apps, SearchAdapterProvider<?> adapterProvider) {
         Resources res = activityContext.getResources();
         mActivityContext = activityContext;
         mApps = apps;
@@ -154,7 +151,7 @@
 
         mOnIconClickListener = mActivityContext.getItemOnClickListener();
 
-        mAdapterProviders = adapterProviders;
+        mAdapterProvider = adapterProvider;
         mExtraHeight = res.getDimensionPixelSize(R.dimen.all_apps_height_extra);
     }
 
@@ -216,9 +213,8 @@
                 return new ViewHolder(mLayoutInflater.inflate(
                         R.layout.work_apps_paused, parent, false));
             default:
-                BaseAdapterProvider adapterProvider = getAdapterProvider(viewType);
-                if (adapterProvider != null) {
-                    return adapterProvider.onCreateViewHolder(mLayoutInflater, parent, viewType);
+                if (mAdapterProvider.isViewSupported(viewType)) {
+                    return mAdapterProvider.onCreateViewHolder(mLayoutInflater, parent, viewType);
                 }
                 throw new RuntimeException("Unexpected view type" + viewType);
         }
@@ -250,19 +246,13 @@
                 ((WorkEduCard) holder.itemView).setPosition(position);
                 break;
             default:
-                BaseAdapterProvider adapterProvider = getAdapterProvider(holder.getItemViewType());
-                if (adapterProvider != null) {
-                    adapterProvider.onBindView(holder, position);
+                if (mAdapterProvider.isViewSupported(holder.getItemViewType())) {
+                    mAdapterProvider.onBindView(holder, position);
                 }
         }
     }
 
     @Override
-    public void onViewRecycled(@NonNull ViewHolder holder) {
-        super.onViewRecycled(holder);
-    }
-
-    @Override
     public boolean onFailedToRecycleView(ViewHolder holder) {
         // Always recycle and we will reset the view when it is bound
         return true;
@@ -283,10 +273,4 @@
         return (viewType & viewTypeMask) != 0;
     }
 
-    @Nullable
-    protected BaseAdapterProvider getAdapterProvider(int viewType) {
-        return Arrays.stream(mAdapterProviders).filter(
-                adapterProvider -> adapterProvider.isViewSupported(viewType)).findFirst().orElse(
-                null);
-    }
 }
diff --git a/src/com/android/launcher3/allapps/search/DefaultSearchAdapterProvider.java b/src/com/android/launcher3/allapps/search/DefaultSearchAdapterProvider.java
index 20edf8a..714304b 100644
--- a/src/com/android/launcher3/allapps/search/DefaultSearchAdapterProvider.java
+++ b/src/com/android/launcher3/allapps/search/DefaultSearchAdapterProvider.java
@@ -15,12 +15,10 @@
  */
 package com.android.launcher3.allapps.search;
 
-import android.graphics.Canvas;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.launcher3.BubbleTextView;
@@ -38,13 +36,7 @@
 
     public DefaultSearchAdapterProvider(ActivityContext launcher) {
         super(launcher);
-        mDecoration = new RecyclerView.ItemDecoration() {
-            @Override
-            public void onDraw(@NonNull Canvas c, @NonNull RecyclerView parent,
-                    @NonNull RecyclerView.State state) {
-                super.onDraw(c, parent, state);
-            }
-        };
+        mDecoration = new RecyclerView.ItemDecoration() { };
     }
 
     @Override
diff --git a/src/com/android/launcher3/allapps/search/SearchAdapterProvider.java b/src/com/android/launcher3/allapps/search/SearchAdapterProvider.java
index 4f7f9af..15756f5 100644
--- a/src/com/android/launcher3/allapps/search/SearchAdapterProvider.java
+++ b/src/com/android/launcher3/allapps/search/SearchAdapterProvider.java
@@ -16,11 +16,13 @@
 
 package com.android.launcher3.allapps.search;
 
+import android.view.LayoutInflater;
 import android.view.View;
+import android.view.ViewGroup;
 
 import androidx.recyclerview.widget.RecyclerView;
 
-import com.android.launcher3.allapps.BaseAdapterProvider;
+import com.android.launcher3.allapps.AllAppsGridAdapter;
 import com.android.launcher3.views.ActivityContext;
 
 /**
@@ -28,7 +30,7 @@
  *
  * @param <T> Context for this adapter provider.
  */
-public abstract class SearchAdapterProvider<T extends ActivityContext> extends BaseAdapterProvider {
+public abstract class SearchAdapterProvider<T extends ActivityContext> {
 
     protected final T mLauncher;
 
@@ -56,4 +58,34 @@
      * Clear the highlighted view.
      */
     public abstract void clearHighlightedItem();
+
+    /**
+     * Returns whether or not viewType can be handled by searchProvider
+     */
+    public abstract boolean isViewSupported(int viewType);
+
+    /**
+     * Called from RecyclerView.Adapter#onBindViewHolder
+     */
+    public abstract void onBindView(AllAppsGridAdapter.ViewHolder holder, int position);
+
+    /**
+     * Called from RecyclerView.Adapter#onCreateViewHolder
+     */
+    public abstract AllAppsGridAdapter.ViewHolder onCreateViewHolder(LayoutInflater layoutInflater,
+            ViewGroup parent, int viewType);
+
+    /**
+     * Returns supported item per row combinations supported
+     */
+    public int[] getSupportedItemsPerRowArray() {
+        return new int[]{};
+    }
+
+    /**
+     * Returns how many cells a view should span
+     */
+    public int getItemsPerRow(int viewType, int appsPerRow) {
+        return appsPerRow;
+    }
 }
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index c90c6bf..2841129 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -272,7 +272,7 @@
 
     public static final BooleanFlag ENABLE_SEARCH_RESULT_LAUNCH_TRANSITION = new DeviceFlag(
             "ENABLE_SEARCH_RESULT_LAUNCH_TRANSITION", false,
-            "Enable option to launch search results using the new standardized transitions");
+            "Enable option to launch search results using the new view container transitions");
 
     public static final BooleanFlag TWO_PREDICTED_ROWS_ALL_APPS_SEARCH = new DeviceFlag(
             "TWO_PREDICTED_ROWS_ALL_APPS_SEARCH", false,
diff --git a/src/com/android/launcher3/model/data/ItemInfo.java b/src/com/android/launcher3/model/data/ItemInfo.java
index 2dd44a4..4eb2e9e 100644
--- a/src/com/android/launcher3/model/data/ItemInfo.java
+++ b/src/com/android/launcher3/model/data/ItemInfo.java
@@ -47,8 +47,10 @@
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.LauncherSettings;
+import com.android.launcher3.LauncherSettings.Animation;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.Workspace;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.logger.LauncherAtom;
 import com.android.launcher3.logger.LauncherAtom.AllAppsContainer;
 import com.android.launcher3.logger.LauncherAtom.ContainerInfo;
@@ -94,6 +96,12 @@
     public int itemType;
 
     /**
+     * One of {@link Animation#DEFAULT},
+     * {@link Animation#VIEW_BACKGROUND}.
+     */
+    public int animationType = Animation.DEFAULT;
+
+    /**
      * The id of the container that holds this item. For the desktop, this will be
      * {@link Favorites#CONTAINER_DESKTOP}. For the all applications folder it
      * will be {@link #NO_ID} (since it is not stored in the settings DB). For user folders
@@ -185,6 +193,7 @@
         rank = info.rank;
         screenId = info.screenId;
         itemType = info.itemType;
+        animationType = info.animationType;
         container = info.container;
         user = info.user;
         contentDescription = info.contentDescription;
@@ -298,6 +307,15 @@
     }
 
     /**
+     * Returns whether this item should use the background animation.
+     */
+    public boolean shouldUseBackgroundAnimation() {
+        return animationType == LauncherSettings.Animation.VIEW_BACKGROUND
+                && FeatureFlags.ENABLE_SEARCH_RESULT_BACKGROUND_DRAWABLES.get()
+                && FeatureFlags.ENABLE_SEARCH_RESULT_LAUNCH_TRANSITION.get();
+    }
+
+    /**
      * Creates {@link LauncherAtom.ItemInfo} with important fields and parent container info.
      */
     @NonNull
diff --git a/src/com/android/launcher3/popup/SystemShortcut.java b/src/com/android/launcher3/popup/SystemShortcut.java
index 0e25984c..69bba69 100644
--- a/src/com/android/launcher3/popup/SystemShortcut.java
+++ b/src/com/android/launcher3/popup/SystemShortcut.java
@@ -40,6 +40,7 @@
 public abstract class SystemShortcut<T extends Context & ActivityContext> extends ItemInfo
         implements View.OnClickListener {
 
+    private static final String TAG = SystemShortcut.class.getSimpleName();
     private final int mIconResId;
     protected final int mLabelResId;
     protected int mAccessibilityActionId;
diff --git a/src/com/android/launcher3/touch/ItemClickHandler.java b/src/com/android/launcher3/touch/ItemClickHandler.java
index 64951ca..790c226 100644
--- a/src/com/android/launcher3/touch/ItemClickHandler.java
+++ b/src/com/android/launcher3/touch/ItemClickHandler.java
@@ -343,7 +343,8 @@
                 return;
             }
         }
-        if (v != null && launcher.supportsAdaptiveIconAnimation(v)) {
+        if (v != null && launcher.supportsAdaptiveIconAnimation(v)
+                && !item.shouldUseBackgroundAnimation()) {
             // Preload the icon to reduce latency b/w swapping the floating view with the original.
             FloatingIconView.fetchIcon(launcher, v, item, true /* isOpening */);
         }
diff --git a/src/com/android/launcher3/util/SplitConfigurationOptions.java b/src/com/android/launcher3/util/SplitConfigurationOptions.java
index 19a3948..8c5e782 100644
--- a/src/com/android/launcher3/util/SplitConfigurationOptions.java
+++ b/src/com/android/launcher3/util/SplitConfigurationOptions.java
@@ -21,11 +21,15 @@
 
 import static java.lang.annotation.RetentionPolicy.SOURCE;
 
+import android.content.Intent;
 import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.view.View;
 
 import androidx.annotation.IntDef;
 
 import com.android.launcher3.logging.StatsLogManager;
+import com.android.launcher3.model.data.ItemInfo;
 
 import java.lang.annotation.Retention;
 
@@ -190,4 +194,35 @@
         return position == STAGE_POSITION_TOP_OR_LEFT ? STAGE_POSITION_BOTTOM_OR_RIGHT
                 : STAGE_POSITION_TOP_OR_LEFT;
     }
+
+    public static class SplitSelectSource {
+
+        /** Keep in sync w/ ActivityTaskManager#INVALID_TASK_ID (unreference-able) */
+        private static final int INVALID_TASK_ID = -1;
+
+        public final View view;
+        public final Drawable drawable;
+        public final Intent intent;
+        public final SplitPositionOption position;
+        public final ItemInfo itemInfo;
+        public final StatsLogManager.EventEnum splitEvent;
+        /** Represents the taskId of the first app to start in split screen */
+        public int alreadyRunningTaskId = INVALID_TASK_ID;
+        /**
+         * If {@code true}, animates the view represented by {@link #alreadyRunningTaskId} into the
+         * split placeholder view
+         */
+        public boolean animateCurrentTaskDismissal;
+
+        public SplitSelectSource(View view, Drawable drawable, Intent intent,
+                SplitPositionOption position, ItemInfo itemInfo,
+                StatsLogManager.EventEnum splitEvent) {
+            this.view = view;
+            this.drawable = drawable;
+            this.intent = intent;
+            this.position = position;
+            this.itemInfo = itemInfo;
+            this.splitEvent = splitEvent;
+        }
+    }
 }
diff --git a/src/com/android/launcher3/views/ActivityContext.java b/src/com/android/launcher3/views/ActivityContext.java
index 79b4cb4..fe60eba 100644
--- a/src/com/android/launcher3/views/ActivityContext.java
+++ b/src/com/android/launcher3/views/ActivityContext.java
@@ -23,6 +23,7 @@
 import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 
 import android.app.ActivityOptions;
+import android.app.PendingIntent;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.ContextWrapper;
@@ -45,6 +46,7 @@
 import android.view.inputmethod.InputMethodManager;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.BubbleTextView;
@@ -70,6 +72,7 @@
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.RunnableList;
+import com.android.launcher3.util.SplitConfigurationOptions;
 import com.android.launcher3.util.ViewCache;
 
 import java.util.List;
@@ -130,6 +133,12 @@
         return null;
     }
 
+    /** Called when the first app in split screen has been selected */
+    default void startSplitSelection(
+            SplitConfigurationOptions.SplitSelectSource splitSelectSource) {
+        // Overridden, intentionally empty
+    }
+
     /**
      * The root view to support drag-and-drop and popup support.
      */
@@ -270,6 +279,29 @@
         }
     }
 
+
+    /**
+     * Sends a pending intent animating from a view.
+     *
+     * @param v View to animate.
+     * @param intent The pending intent being launched.
+     * @param item Item associated with the view.
+     * @return {@code true} if the intent is sent successfully.
+     */
+    default boolean sendPendingIntentWithAnimation(
+            @NonNull View v, PendingIntent intent, @Nullable ItemInfo item) {
+        Bundle optsBundle = getActivityLaunchOptions(v, item).toBundle();
+        try {
+            intent.send(null, 0, null, null, null, null, optsBundle);
+            return true;
+        } catch (PendingIntent.CanceledException e) {
+            Toast.makeText(v.getContext(),
+                    v.getContext().getResources().getText(R.string.shortcut_not_available),
+                    Toast.LENGTH_SHORT).show();
+        }
+        return false;
+    }
+
     /**
      * Safely starts an activity.
      *
diff --git a/src/com/android/launcher3/views/ScrimView.java b/src/com/android/launcher3/views/ScrimView.java
index 870ff12..ca80c51 100644
--- a/src/com/android/launcher3/views/ScrimView.java
+++ b/src/com/android/launcher3/views/ScrimView.java
@@ -77,6 +77,10 @@
         super.setBackgroundColor(color);
     }
 
+    public int getBackgroundColor() {
+        return mBackgroundColor;
+    }
+
     @Override
     public void onVisibilityAggregated(boolean isVisible) {
         super.onVisibilityAggregated(isVisible);