Merge changes from topics "taskbar3Button", "taskbarIME" into sc-dev am: b2993d65b7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14215248

Change-Id: I694075af1cab1c98e3a4a473a09af6b749519701

quickstep/res/drawable/ic_ime_switcher.xml

@@ -0,0 +1,25 @@
+<!--
+  ~ 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
+  -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:pathData="M19,7h2v2h-2V7zM15,7h2v2h-2V7zM3,7h2v2H3V7zM7,7h2v2H7V7zM11,7h2v2h-2V7zM19,11h2v2h-2V11zM15,11h2v2h-2V11zM3,11h2v2H3V11zM7,11h2v2H7V11zM11,11h2v2h-2V11zM7,15h10v2H7V15z"
+        android:fillColor="@android:color/white" />
+</vector>

quickstep/res/layout/taskbar.xml

@@ -26,4 +26,10 @@
         android:layout_height="wrap_content"
         android:gravity="center"/>
 
+    <com.android.launcher3.taskbar.ImeBarView
+        android:id="@+id/ime_bar_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:visibility="gone"/>
+
 </com.android.launcher3.taskbar.TaskbarContainerView>

quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java

@@ -31,8 +31,11 @@ import android.app.ActivityOptions;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentSender;
+import android.content.ComponentName;
+import android.content.ServiceConnection;
 import android.os.Bundle;
 import android.os.CancellationSignal;
+import android.os.IBinder;
 import android.view.View;
 
 import androidx.annotation.Nullable;
@@ -62,6 +65,7 @@ import com.android.quickstep.SysUINavigationMode.Mode;
 import com.android.quickstep.SysUINavigationMode.NavigationModeChangeListener;
 import com.android.quickstep.SystemUiProxy;
 import com.android.quickstep.TaskUtils;
+import com.android.quickstep.TouchInteractionService;
 import com.android.quickstep.util.RemoteAnimationProvider;
 import com.android.quickstep.util.RemoteFadeOutAnimationListener;
 import com.android.quickstep.util.SplitSelectStateController;
@@ -83,6 +87,8 @@ public abstract class BaseQuickstepLauncher extends Launcher
 
     private DepthController mDepthController = new DepthController(this);
     private QuickstepTransitionManager mAppTransitionManager;
+    private ServiceConnection mTisBinderConnection;
+    protected TouchInteractionService.TISBinder mTisBinder;
 
     /**
      * Reusable command for applying the back button alpha on the background thread.
@@ -104,6 +110,24 @@ public abstract class BaseQuickstepLauncher extends Launcher
         super.onCreate(savedInstanceState);
         SysUINavigationMode.INSTANCE.get(this).addModeChangeListener(this);
         addMultiWindowModeChangedListener(mDepthController);
+        setupTouchInteractionServiceBinder();
+    }
+
+    private void setupTouchInteractionServiceBinder() {
+        Intent intent = new Intent(this, TouchInteractionService.class);
+        mTisBinderConnection = new ServiceConnection() {
+            @Override
+            public void onServiceConnected(ComponentName componentName, IBinder binder) {
+                mTisBinder = ((TouchInteractionService.TISBinder) binder);
+                mTisBinder.setTaskbarOverviewProxyDelegate(mTaskbarController);
+            }
+
+            @Override
+            public void onServiceDisconnected(ComponentName componentName) {
+                mTisBinder = null;
+            }
+        };
+        bindService(intent, mTisBinderConnection, 0);
     }
 
     @Override
@@ -114,6 +138,10 @@ public abstract class BaseQuickstepLauncher extends Launcher
         if (mTaskbarController != null) {
             mTaskbarController.cleanup();
             mTaskbarController = null;
+            if (mTisBinder != null) {
+                mTisBinder.setTaskbarOverviewProxyDelegate(null);
+                unbindService(mTisBinderConnection);
+            }
         }
 
         super.onDestroy();
@@ -249,6 +277,9 @@ public abstract class BaseQuickstepLauncher extends Launcher
     private void addTaskbarIfNecessary() {
         if (mTaskbarController != null) {
             mTaskbarController.cleanup();
+            if (mTisBinder != null) {
+                mTisBinder.setTaskbarOverviewProxyDelegate(null);
+            }
             mTaskbarController = null;
         }
         if (mDeviceProfile.isTaskbarPresent) {
@@ -257,6 +288,9 @@ public abstract class BaseQuickstepLauncher extends Launcher
             mTaskbarController = new TaskbarController(this,
                     taskbarActivityContext.getTaskbarContainerView(), taskbarViewOnHome);
             mTaskbarController.init();
+            if (mTisBinder != null) {
+                mTisBinder.setTaskbarOverviewProxyDelegate(mTaskbarController);
+            }
         }
     }
 

quickstep/src/com/android/launcher3/taskbar/ButtonProvider.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 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.taskbar;
+
+import android.annotation.DrawableRes;
+import android.content.Context;
+import android.view.View;
+import android.widget.ImageView;
+
+import com.android.launcher3.R;
+
+/**
+ * Creates Buttons for Taskbar for 3 button nav.
+ * Can add animations and state management for buttons in this class as things progress.
+ */
+public class ButtonProvider {
+
+    private int mMarginLeftRight;
+    private final Context mContext;
+
+    public ButtonProvider(Context context) {
+        mContext = context;
+    }
+
+    public void setMarginLeftRight(int margin) {
+        mMarginLeftRight = margin;
+    }
+
+    public View getBack() {
+        // Back button
+        return getButtonForDrawable(R.drawable.ic_sysbar_back);
+    }
+
+    public View getDown() {
+        // Ime down button
+        return getButtonForDrawable(R.drawable.ic_sysbar_back);
+    }
+
+    public View getHome() {
+        // Home button
+        return getButtonForDrawable(R.drawable.ic_sysbar_home);
+    }
+
+    public View getRecents() {
+        // Recents button
+        return getButtonForDrawable(R.drawable.ic_sysbar_recent);
+    }
+
+    public View getImeSwitcher() {
+        // IME Switcher Button
+        return getButtonForDrawable(R.drawable.ic_ime_switcher);
+    }
+
+    private View getButtonForDrawable(@DrawableRes int drawableId) {
+        ImageView buttonView = new ImageView(mContext);
+        buttonView.setImageResource(drawableId);
+        buttonView.setBackgroundResource(R.drawable.taskbar_icon_click_feedback_roundrect);
+        buttonView.setPadding(mMarginLeftRight, 0, mMarginLeftRight, 0);
+        return buttonView;
+    }
+
+}

quickstep/src/com/android/launcher3/taskbar/ImeBarView.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright 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.taskbar;
+
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_BACK;
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_IME_SWITCH;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.RelativeLayout;
+
+import com.android.launcher3.views.ActivityContext;
+
+public class ImeBarView extends RelativeLayout {
+
+    private ButtonProvider mButtonProvider;
+    private TaskbarController.TaskbarViewCallbacks mControllerCallbacks;
+    private View mImeView;
+
+    public ImeBarView(Context context) {
+        this(context, null);
+    }
+
+    public ImeBarView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public ImeBarView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public void construct(ButtonProvider buttonProvider) {
+        mButtonProvider = buttonProvider;
+    }
+
+    public void init(TaskbarController.TaskbarViewCallbacks taskbarCallbacks) {
+        mControllerCallbacks = taskbarCallbacks;
+        ActivityContext context = getActivityContext();
+        RelativeLayout.LayoutParams imeParams = new RelativeLayout.LayoutParams(
+                context.getDeviceProfile().iconSizePx,
+                context.getDeviceProfile().iconSizePx
+        );
+        RelativeLayout.LayoutParams downParams = new RelativeLayout.LayoutParams(imeParams);
+
+        imeParams.addRule(ALIGN_PARENT_END);
+        imeParams.setMarginEnd(context.getDeviceProfile().iconSizePx);
+        downParams.setMarginStart(context.getDeviceProfile().iconSizePx);
+        downParams.addRule(ALIGN_PARENT_START);
+
+        // Down Arrow
+        View downView = mButtonProvider.getDown();
+        downView.setOnClickListener(view -> mControllerCallbacks.onNavigationButtonClick(
+                BUTTON_BACK));
+        downView.setLayoutParams(downParams);
+        downView.setRotation(-90);
+        addView(downView);
+
+        // IME switcher button
+        mImeView = mButtonProvider.getImeSwitcher();
+        mImeView.setOnClickListener(view -> mControllerCallbacks.onNavigationButtonClick(
+                BUTTON_IME_SWITCH));
+        mImeView.setLayoutParams(imeParams);
+        addView(mImeView);
+    }
+
+    public void cleanup() {
+        removeAllViews();
+    }
+
+    public void setImeSwitcherVisibility(boolean show) {
+        mImeView.setVisibility(show ? VISIBLE : GONE);
+    }
+
+    private <T extends Context & ActivityContext> T getActivityContext() {
+        return ActivityContext.lookupContext(getContext());
+    }
+}

quickstep/src/com/android/launcher3/taskbar/TaskbarAnimationController.java

@@ -44,7 +44,7 @@ public class TaskbarAnimationController {
     private final AnimatedFloat mTaskbarVisibilityAlphaForLauncherState = new AnimatedFloat(
             this::updateVisibilityAlpha);
     private final AnimatedFloat mTaskbarVisibilityAlphaForIme = new AnimatedFloat(
-            this::updateVisibilityAlpha);
+            this::updateVisibilityAlphaForIme);
 
     // Scale.
     private final AnimatedFloat mTaskbarScaleForLauncherState = new AnimatedFloat(
@@ -110,16 +110,22 @@ public class TaskbarAnimationController {
         // We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
         // assumption being that Taskbar should always be visible regardless of the current
         // LauncherState if Launcher is paused.
+        float alphaDueToIme = mTaskbarVisibilityAlphaForIme.value;
         float alphaDueToLauncher = Math.max(mTaskbarBackgroundAlpha.value,
                 mTaskbarVisibilityAlphaForLauncherState.value);
-        float alphaDueToOther = mTaskbarVisibilityAlphaForIme.value;
-        float taskbarAlpha = alphaDueToLauncher * alphaDueToOther;
+        float taskbarAlpha = alphaDueToLauncher * alphaDueToIme;
         mTaskbarCallbacks.updateTaskbarVisibilityAlpha(taskbarAlpha);
 
         // Make the nav bar invisible if taskbar is visible.
         setNavBarButtonAlpha(1f - taskbarAlpha);
     }
 
+    private void updateVisibilityAlphaForIme() {
+        updateVisibilityAlpha();
+        float taskbarAlphaDueToIme = mTaskbarVisibilityAlphaForIme.value;
+        mTaskbarCallbacks.updateImeBarVisibilityAlpha(1f - taskbarAlphaDueToIme);
+    }
+
     private void updateScale() {
         // We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
         // assumption being that Taskbar should always be at scale 1f regardless of the current

quickstep/src/com/android/launcher3/taskbar/TaskbarController.java

@@ -15,6 +15,9 @@
  */
 package com.android.launcher3.taskbar;
 
+import static android.view.View.GONE;
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
@@ -28,6 +31,7 @@ import android.app.ActivityOptions;
 import android.graphics.PixelFormat;
 import android.graphics.Point;
 import android.graphics.Rect;
+import android.inputmethodservice.InputMethodService;
 import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.View;
@@ -53,7 +57,7 @@ import com.android.launcher3.touch.ItemClickHandler;
 import com.android.launcher3.views.ActivityContext;
 import com.android.quickstep.AnimatedFloat;
 import com.android.quickstep.SysUINavigationMode;
-import com.android.quickstep.TaskAnimationManager;
+import com.android.quickstep.TouchInteractionService.TaskbarOverviewProxyDelegate;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.WindowManagerWrapper;
@@ -61,13 +65,15 @@ import com.android.systemui.shared.system.WindowManagerWrapper;
 /**
  * Interfaces with Launcher/WindowManager/SystemUI to determine what to show in TaskbarView.
  */
-public class TaskbarController {
+public class TaskbarController implements TaskbarOverviewProxyDelegate {
 
     private static final String WINDOW_TITLE = "Taskbar";
 
     private final TaskbarContainerView mTaskbarContainerView;
     private final TaskbarView mTaskbarViewInApp;
     private final TaskbarView mTaskbarViewOnHome;
+    private final ImeBarView mImeBarView;
+
     private final BaseQuickstepLauncher mLauncher;
     private final WindowManager mWindowManager;
     // Layout width and height of the Taskbar in the default state.
@@ -92,10 +98,13 @@ public class TaskbarController {
         mLauncher = launcher;
         mTaskbarContainerView = taskbarContainerView;
         mTaskbarContainerView.construct(createTaskbarContainerViewCallbacks());
+        ButtonProvider buttonProvider = new ButtonProvider(launcher);
         mTaskbarViewInApp = mTaskbarContainerView.findViewById(R.id.taskbar_view);
-        mTaskbarViewInApp.construct(createTaskbarViewCallbacks());
+        mTaskbarViewInApp.construct(createTaskbarViewCallbacks(), buttonProvider);
         mTaskbarViewOnHome = taskbarViewOnHome;
-        mTaskbarViewOnHome.construct(createTaskbarViewCallbacks());
+        mTaskbarViewOnHome.construct(createTaskbarViewCallbacks(), buttonProvider);
+        mImeBarView = mTaskbarContainerView.findViewById(R.id.ime_bar_view);
+        mImeBarView.construct(buttonProvider);
         mNavButtonController = new TaskbarNavButtonController(launcher);
         mWindowManager = mLauncher.getWindowManager();
         mTaskbarSize = new Point(MATCH_PARENT, mLauncher.getDeviceProfile().taskbarSize);
@@ -116,10 +125,20 @@ public class TaskbarController {
 
             @Override
             public void updateTaskbarVisibilityAlpha(float alpha) {
-                mTaskbarContainerView.setAlpha(alpha);
+                mTaskbarViewInApp.setAlpha(alpha);
                 mTaskbarViewOnHome.setAlpha(alpha);
             }
 
+            @Override
+            public void updateImeBarVisibilityAlpha(float alpha) {
+                if (mNavMode != SysUINavigationMode.Mode.THREE_BUTTONS) {
+                    // TODO Remove sysui IME bar for gesture nav as well
+                    return;
+                }
+                mImeBarView.setAlpha(alpha);
+                mImeBarView.setVisibility(alpha == 0 ? GONE : VISIBLE);
+            }
+
             @Override
             public void updateTaskbarScale(float scale) {
                 mTaskbarViewInApp.setScaleX(scale);
@@ -144,16 +163,21 @@ public class TaskbarController {
         return new TaskbarContainerViewCallbacks() {
             @Override
             public void onViewRemoved() {
-                if (mTaskbarContainerView.getChildCount() == 1) {
-                    // Only TaskbarView remains.
-                    setTaskbarWindowFullscreen(false);
+                // Ensure no other children present (like Folders, etc)
+                for (int i = 0; i < mTaskbarContainerView.getChildCount(); i++) {
+                    View v = mTaskbarContainerView.getChildAt(i);
+                    if (!((v instanceof TaskbarView) || (v instanceof ImeBarView))){
+                        return;
+                    }
                 }
+                setTaskbarWindowFullscreen(false);
             }
 
             @Override
             public boolean isTaskbarTouchable() {
                 return mTaskbarContainerView.getAlpha() > AlphaUpdateListener.ALPHA_CUTOFF_THRESHOLD
-                        && mTaskbarViewInApp.getVisibility() == View.VISIBLE
+                        && (mTaskbarViewInApp.getVisibility() == VISIBLE
+                            || mImeBarView.getVisibility() == VISIBLE)
                         && !mIsAnimatingToLauncher;
             }
         };
@@ -206,7 +230,7 @@ public class TaskbarController {
                 // space so that the others line up with the home screen hotseat.
                 boolean isOnHomeScreen = taskbarView == mTaskbarViewOnHome
                         || mLauncher.hasBeenResumed() || mIsAnimatingToLauncher;
-                return isOnHomeScreen ? View.INVISIBLE : View.GONE;
+                return isOnHomeScreen ? INVISIBLE : GONE;
             }
 
             @Override
@@ -246,6 +270,7 @@ public class TaskbarController {
         mTaskbarViewInApp.init(mHotseatController.getNumHotseatIcons(), mNavMode);
         mTaskbarViewOnHome.init(mHotseatController.getNumHotseatIcons(), mNavMode);
         mTaskbarContainerView.init(mTaskbarViewInApp);
+        mImeBarView.init(createTaskbarViewCallbacks());
         addToWindowManager();
         mTaskbarStateHandler.setTaskbarCallbacks(createTaskbarStateHandlerCallbacks());
         mTaskbarAnimationController.init();
@@ -287,6 +312,7 @@ public class TaskbarController {
         mTaskbarViewInApp.cleanup();
         mTaskbarViewOnHome.cleanup();
         mTaskbarContainerView.cleanup();
+        mImeBarView.cleanup();
         removeFromWindowManager();
         mTaskbarStateHandler.setTaskbarCallbacks(null);
         mTaskbarAnimationController.cleanup();
@@ -410,6 +436,28 @@ public class TaskbarController {
      */
     public void setIsImeVisible(boolean isImeVisible) {
         mTaskbarAnimationController.animateToVisibilityForIme(isImeVisible ? 0 : 1);
+        blockTaskbarTouchesForIme(isImeVisible);
+    }
+
+    /**
+     * When in 3 button nav, the above doesn't get called since we prevent sysui nav bar from
+     * instantiating at all, which is what's responsible for sending sysui state flags over.
+     *
+     * @param vis IME visibility flag
+     * @param backDisposition Used to determine back button behavior for software keyboard
+     *                        See BACK_DISPOSITION_* constants in {@link InputMethodService}
+     */
+    public void updateImeStatus(int displayId, int vis, int backDisposition,
+            boolean showImeSwitcher) {
+        if (displayId != mTaskbarContainerView.getContext().getDisplayId() ||
+                mNavMode != SysUINavigationMode.Mode.THREE_BUTTONS) {
+            return;
+        }
+
+        boolean imeVisible = (vis & InputMethodService.IME_VISIBLE) != 0;
+        mTaskbarAnimationController.animateToVisibilityForIme(imeVisible ? 0 : 1);
+        mImeBarView.setImeSwitcherVisibility(showImeSwitcher);
+        blockTaskbarTouchesForIme(imeVisible);
     }
 
     /**
@@ -459,12 +507,17 @@ public class TaskbarController {
 
     private void setWhichTaskbarViewIsVisible(@Nullable TaskbarView visibleTaskbar) {
         mTaskbarViewInApp.setVisibility(visibleTaskbar == mTaskbarViewInApp
-                ? View.VISIBLE : View.INVISIBLE);
+                ? VISIBLE : INVISIBLE);
         mTaskbarViewOnHome.setVisibility(visibleTaskbar == mTaskbarViewOnHome
-                ? View.VISIBLE : View.INVISIBLE);
+                ? VISIBLE : INVISIBLE);
         mLauncher.getHotseat().setIconsAlpha(visibleTaskbar != mTaskbarViewInApp ? 1f : 0f);
     }
 
+    private void blockTaskbarTouchesForIme(boolean block) {
+        mTaskbarViewOnHome.setTouchesEnabled(!block);
+        mTaskbarViewInApp.setTouchesEnabled(!block);
+    }
+
     /**
      * Returns the ratio of the taskbar icon size on home vs in an app.
      */
@@ -508,6 +561,7 @@ public class TaskbarController {
     protected interface TaskbarAnimationControllerCallbacks {
         void updateTaskbarBackgroundAlpha(float alpha);
         void updateTaskbarVisibilityAlpha(float alpha);
+        void updateImeBarVisibilityAlpha(float alpha);
         void updateTaskbarScale(float scale);
         void updateTaskbarTranslationY(float translationY);
     }

quickstep/src/com/android/launcher3/taskbar/TaskbarNavButtonController.java

@@ -18,6 +18,7 @@ package com.android.launcher3.taskbar;
 
 import android.content.Context;
 import android.content.Intent;
+import android.view.inputmethod.InputMethodManager;
 
 import androidx.annotation.IntDef;
 
@@ -41,7 +42,8 @@ public class TaskbarNavButtonController {
     @IntDef(value = {
             BUTTON_BACK,
             BUTTON_HOME,
-            BUTTON_RECENTS
+            BUTTON_RECENTS,
+            BUTTON_IME_SWITCH
     })
 
     public @interface TaskbarButton {}
@@ -49,6 +51,7 @@ public class TaskbarNavButtonController {
     static final int BUTTON_BACK = 1;
     static final int BUTTON_HOME = BUTTON_BACK << 1;
     static final int BUTTON_RECENTS = BUTTON_HOME << 1;
+    static final int BUTTON_IME_SWITCH = BUTTON_RECENTS << 1;
 
 
     private final Context mContext;
@@ -68,6 +71,9 @@ public class TaskbarNavButtonController {
             case BUTTON_RECENTS:
                 navigateToOverview();;
                 break;
+            case BUTTON_IME_SWITCH:
+                showIMESwitcher();
+                break;
         }
     }
 
@@ -86,4 +92,9 @@ public class TaskbarNavButtonController {
         SystemUiProxy.INSTANCE.getNoCreate().onBackPressed();
     }
 
+    private void showIMESwitcher() {
+        mContext.getSystemService(InputMethodManager.class).showInputMethodPickerFromSystem(
+                true /* showAuxiliarySubtypes */, mContext.getDisplayId());
+    }
+
 }

quickstep/src/com/android/launcher3/taskbar/TaskbarView.java

@@ -15,9 +15,6 @@
  */
 package com.android.launcher3.taskbar;
 
-import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
-import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
-
 import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_BACK;
 import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_HOME;
 import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_RECENTS;
@@ -38,7 +35,6 @@ import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewConfiguration;
-import android.widget.ImageView;
 import android.widget.LinearLayout;
 
 import androidx.annotation.LayoutRes;
@@ -83,18 +79,21 @@ public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconPa
     private LayoutTransition mLayoutTransition;
     private int mHotseatStartIndex;
     private int mHotseatEndIndex;
-
     private LinearLayout mButtonRegion;
 
     // Delegate touches to the closest view if within mIconTouchSize.
     private boolean mDelegateTargeted;
     private View mDelegateView;
+    // Prevents dispatching touches to children if true
+    private boolean mTouchEnabled = true;
 
     private boolean mIsDraggingItem;
     // Only non-null when the corresponding Folder is open.
     private @Nullable FolderIcon mLeaveBehindFolderIcon;
 
     private int mNavButtonStartIndex;
+    /** Provider of buttons added to taskbar in 3 button nav */
+    private ButtonProvider mButtonProvider;
 
     public TaskbarView(@NonNull Context context) {
         this(context, null);
@@ -119,11 +118,14 @@ public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconPa
         mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
     }
 
-    protected void construct(TaskbarController.TaskbarViewCallbacks taskbarViewCallbacks) {
+    protected void construct(TaskbarController.TaskbarViewCallbacks taskbarViewCallbacks,
+            ButtonProvider buttonProvider) {
         mControllerCallbacks = taskbarViewCallbacks;
         mNonIconScale = mControllerCallbacks.getNonIconScale(this);
         mItemMarginLeftRight = getResources().getDimensionPixelSize(R.dimen.taskbar_icon_spacing);
         mItemMarginLeftRight = Math.round(mItemMarginLeftRight * mNonIconScale);
+        mButtonProvider = buttonProvider;
+        mButtonProvider.setMarginLeftRight(mItemMarginLeftRight);
     }
 
     protected void init(int numHotseatIcons, SysUINavigationMode.Mode newMode) {
@@ -272,12 +274,24 @@ public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconPa
         }
     }
 
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        if (!mTouchEnabled) {
+            return true;
+        }
+        return super.dispatchTouchEvent(ev);
+    }
+
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         boolean handled = delegateTouchIfNecessary(event);
         return super.onTouchEvent(event) || handled;
     }
 
+    public void setTouchesEnabled(boolean touchEnabled) {
+        this.mTouchEnabled = touchEnabled;
+    }
+
     /**
      * User touched the Taskbar background. Determine whether the touch is close enough to a view
      * that we should forward the touches to it.
@@ -383,9 +397,6 @@ public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconPa
             mButtonRegion.removeAllViews();
         }
         mButtonRegion.setVisibility(VISIBLE);
-        LayoutParams regionParams = new LayoutParams(WRAP_CONTENT, MATCH_PARENT);
-        regionParams.gravity = Gravity.START; // check left/right preference
-        regionParams.setMargins(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
 
         LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(
                 context.getDeviceProfile().iconSizePx,
@@ -393,29 +404,18 @@ public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconPa
         );
         buttonParams.gravity = Gravity.CENTER;
 
-        // Back button
-        ImageView backButton = new ImageView(getContext());
-        backButton.setImageResource(R.drawable.ic_sysbar_back);
-        backButton.setBackgroundResource(R.drawable.taskbar_icon_click_feedback_roundrect);
-        backButton.setPadding(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
+        View backButton = mButtonProvider.getBack();
         backButton.setOnClickListener(view -> mControllerCallbacks.onNavigationButtonClick(
                 BUTTON_BACK));
         mButtonRegion.addView(backButton, buttonParams);
 
         // Home button
-        ImageView homeButton = new ImageView(getContext());
-        homeButton.setImageResource(R.drawable.ic_sysbar_home);
-        homeButton.setBackgroundResource(R.drawable.taskbar_icon_click_feedback_roundrect);
-        homeButton.setPadding(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
+        View homeButton = mButtonProvider.getHome();
         homeButton.setOnClickListener(view -> mControllerCallbacks.onNavigationButtonClick(
                 BUTTON_HOME));
         mButtonRegion.addView(homeButton, buttonParams);
 
-        // Recents button
-        ImageView recentsButton = new ImageView(getContext());
-        recentsButton.setImageResource(R.drawable.ic_sysbar_recent);
-        recentsButton.setBackgroundResource(R.drawable.taskbar_icon_click_feedback_roundrect);
-        recentsButton.setPadding(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
+        View recentsButton = mButtonProvider.getRecents();
         recentsButton.setOnClickListener(view -> mControllerCallbacks.onNavigationButtonClick(
                 BUTTON_RECENTS));
         mButtonRegion.addView(recentsButton, buttonParams);

quickstep/src/com/android/quickstep/TouchInteractionService.java

@@ -52,6 +52,7 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.Looper;
+import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.SystemProperties;
 import android.util.Log;
@@ -145,7 +146,22 @@ public class TouchInteractionService extends Service implements PluginListener<O
     @Nullable
     private OverscrollPlugin mOverscrollPlugin;
 
-    private final IBinder mMyBinder = new IOverviewProxy.Stub() {
+    /**
+     * Extension of OverviewProxy aidl interface without needing to modify the actual interface.
+     * This is for methods that need only need local access and not intended to make IPC calls.
+     */
+    public abstract static class TISBinder extends IOverviewProxy.Stub {
+        public abstract void setTaskbarOverviewProxyDelegate(
+                @Nullable TaskbarOverviewProxyDelegate i);
+    }
+
+
+    private final TISBinder mMyBinder = new TISBinder() {
+
+        public void setTaskbarOverviewProxyDelegate(
+                @Nullable TaskbarOverviewProxyDelegate delegate) {
+            mTaskbarOverviewProxyDelegate = delegate;
+        }
 
         @BinderThread
         public void onInitialize(Bundle bundle) {
@@ -252,16 +268,39 @@ public class TouchInteractionService extends Service implements PluginListener<O
             MAIN_EXECUTOR.execute(() -> mDeviceState.setDeferredGestureRegion(region));
         }
 
+        @Override
         public void onSplitScreenSecondaryBoundsChanged(Rect bounds, Rect insets)  {
             WindowBounds wb = new WindowBounds(bounds, insets);
             MAIN_EXECUTOR.execute(() -> SplitScreenBounds.INSTANCE.setSecondaryWindowBounds(wb));
         }
+
+        @Override
+        public void onImeWindowStatusChanged(int displayId, IBinder token, int vis,
+                int backDisposition, boolean showImeSwitcher) throws RemoteException {
+            if (mTaskbarOverviewProxyDelegate == null) {
+                return;
+            }
+            MAIN_EXECUTOR.execute(() -> {
+                if (mTaskbarOverviewProxyDelegate == null) {
+                    return;
+                }
+                mTaskbarOverviewProxyDelegate
+                        .updateImeStatus(displayId, vis, backDisposition, showImeSwitcher);
+            });
+        }
     };
 
+    public interface TaskbarOverviewProxyDelegate {
+        void updateImeStatus(int displayId, int vis, int backDisposition,
+                boolean showImeSwitcher);
+    }
+
     private static boolean sConnected = false;
     private static TouchInteractionService sInstance;
     private static boolean sIsInitialized = false;
     private RotationTouchHelper mRotationTouchHelper;
+    @Nullable
+    private TaskbarOverviewProxyDelegate mTaskbarOverviewProxyDelegate;
 
     public static boolean isConnected() {
         return sConnected;