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/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/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 078865f..3606018 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;
@@ -91,6 +99,7 @@
 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;
@@ -132,6 +141,7 @@
 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;
@@ -149,9 +159,11 @@
 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;
@@ -167,6 +179,7 @@
 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;
 
@@ -361,7 +374,7 @@
         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);
@@ -548,6 +561,64 @@
     }
 
     @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/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 b481be3..3a1b0a8 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/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/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..d794f36 100644
--- a/src/com/android/launcher3/views/ActivityContext.java
+++ b/src/com/android/launcher3/views/ActivityContext.java
@@ -70,6 +70,7 @@
 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 +131,12 @@
         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.
      */