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Commit d90d158e authored by Garfield Tan's avatar Garfield Tan Committed by Automerger Merge Worker
Browse files

Merge "Put window decors at one place" into tm-qpr-dev am: 16b78301 am: de69a867 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20103663



Change-Id: Ide479f8739fc337473ffb90f4d2ae5c85a06c624
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents e3f42cfc de69a867

libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellBaseModule.java

+6 −6
Original line number Diff line number Diff line
@@ -293,17 +293,17 @@ public abstract class WMShellBaseModule { 
    // Workaround for dynamic overriding with a default implementation, see {@link DynamicOverride}

    @BindsOptionalOf

    @DynamicOverride

    abstract FullscreenTaskListener<?> optionalFullscreenTaskListener();

    abstract FullscreenTaskListener optionalFullscreenTaskListener();



    @WMSingleton

    @Provides

    static FullscreenTaskListener<?> provideFullscreenTaskListener(

            @DynamicOverride Optional<FullscreenTaskListener<?>> fullscreenTaskListener,

    static FullscreenTaskListener provideFullscreenTaskListener(

            @DynamicOverride Optional<FullscreenTaskListener> fullscreenTaskListener,

            ShellInit shellInit,

            ShellTaskOrganizer shellTaskOrganizer,

            SyncTransactionQueue syncQueue,

            Optional<RecentTasksController> recentTasksOptional,

            Optional<WindowDecorViewModel<?>> windowDecorViewModelOptional) {

            Optional<WindowDecorViewModel> windowDecorViewModelOptional) {

        if (fullscreenTaskListener.isPresent()) {

            return fullscreenTaskListener.get();

        } else {
@@ -317,7 +317,7 @@ public abstract class WMShellBaseModule { 
    //



    @BindsOptionalOf

    abstract WindowDecorViewModel<?> optionalWindowDecorViewModel();

    abstract WindowDecorViewModel optionalWindowDecorViewModel();



    //

    // Unfold transition
@@ -769,7 +769,7 @@ public abstract class WMShellBaseModule { 
            Optional<SplitScreenController> splitScreenOptional,

            Optional<Pip> pipOptional,

            Optional<PipTouchHandler> pipTouchHandlerOptional,

            FullscreenTaskListener<?> fullscreenTaskListener,

            FullscreenTaskListener fullscreenTaskListener,

            Optional<UnfoldAnimationController> unfoldAnimationController,

            Optional<UnfoldTransitionHandler> unfoldTransitionHandler,

            Optional<FreeformComponents> freeformComponents,

libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellModule.java

+8 −10
Original line number Diff line number Diff line
@@ -55,7 +55,6 @@ import com.android.wm.shell.freeform.FreeformComponents; 
import com.android.wm.shell.freeform.FreeformTaskListener;

import com.android.wm.shell.freeform.FreeformTaskTransitionHandler;

import com.android.wm.shell.freeform.FreeformTaskTransitionObserver;

import com.android.wm.shell.fullscreen.FullscreenTaskListener;

import com.android.wm.shell.kidsmode.KidsModeTaskOrganizer;

import com.android.wm.shell.onehanded.OneHandedController;

import com.android.wm.shell.pip.Pip;
@@ -183,7 +182,7 @@ public abstract class WMShellModule { 


    @WMSingleton

    @Provides

    static WindowDecorViewModel<?> provideWindowDecorViewModel(

    static WindowDecorViewModel provideWindowDecorViewModel(

            Context context,

            @ShellMainThread Handler mainHandler,

            @ShellMainThread Choreographer mainChoreographer,
@@ -209,7 +208,7 @@ public abstract class WMShellModule { 
    @Provides

    @DynamicOverride

    static FreeformComponents provideFreeformComponents(

            FreeformTaskListener<?> taskListener,

            FreeformTaskListener taskListener,

            FreeformTaskTransitionHandler transitionHandler,

            FreeformTaskTransitionObserver transitionObserver) {

        return new FreeformComponents(
@@ -218,18 +217,18 @@ public abstract class WMShellModule { 


    @WMSingleton

    @Provides

    static FreeformTaskListener<?> provideFreeformTaskListener(

    static FreeformTaskListener provideFreeformTaskListener(

            Context context,

            ShellInit shellInit,

            ShellTaskOrganizer shellTaskOrganizer,

            Optional<DesktopModeTaskRepository> desktopModeTaskRepository,

            WindowDecorViewModel<?> windowDecorViewModel) {

            WindowDecorViewModel windowDecorViewModel) {

        // TODO(b/238217847): Temporarily add this check here until we can remove the dynamic

        //                    override for this controller from the base module

        ShellInit init = FreeformComponents.isFreeformEnabled(context)

                ? shellInit

                : null;

        return new FreeformTaskListener<>(init, shellTaskOrganizer, desktopModeTaskRepository,

        return new FreeformTaskListener(init, shellTaskOrganizer, desktopModeTaskRepository,

                windowDecorViewModel);

    }
@@ -238,7 +237,7 @@ public abstract class WMShellModule { 
    static FreeformTaskTransitionHandler provideFreeformTaskTransitionHandler(

            ShellInit shellInit,

            Transitions transitions,

            WindowDecorViewModel<?> windowDecorViewModel) {

            WindowDecorViewModel windowDecorViewModel) {

        return new FreeformTaskTransitionHandler(shellInit, transitions, windowDecorViewModel);

    }
@@ -248,10 +247,9 @@ public abstract class WMShellModule { 
            Context context,

            ShellInit shellInit,

            Transitions transitions,

            FullscreenTaskListener<?> fullscreenTaskListener,

            FreeformTaskListener<?> freeformTaskListener) {

            WindowDecorViewModel windowDecorViewModel) {

        return new FreeformTaskTransitionObserver(

                context, shellInit, transitions, fullscreenTaskListener, freeformTaskListener);

                context, shellInit, transitions, windowDecorViewModel);

    }



    //

libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskListener.java

+18 −156
Original line number Diff line number Diff line
@@ -19,12 +19,8 @@ package com.android.wm.shell.freeform; 
import static com.android.wm.shell.ShellTaskOrganizer.TASK_LISTENER_TYPE_FREEFORM;



import android.app.ActivityManager.RunningTaskInfo;

import android.util.Log;

import android.util.SparseArray;

import android.view.SurfaceControl;

import android.window.TransitionInfo;



import androidx.annotation.Nullable;



import com.android.internal.protolog.common.ProtoLog;

import com.android.wm.shell.ShellTaskOrganizer;
@@ -41,31 +37,26 @@ import java.util.Optional; 
/**

 * {@link ShellTaskOrganizer.TaskListener} for {@link

 * ShellTaskOrganizer#TASK_LISTENER_TYPE_FREEFORM}.

 *

 * @param <T> the type of window decoration instance

 */

public class FreeformTaskListener<T extends AutoCloseable>

        implements ShellTaskOrganizer.TaskListener {

public class FreeformTaskListener implements ShellTaskOrganizer.TaskListener {

    private static final String TAG = "FreeformTaskListener";



    private final ShellTaskOrganizer mShellTaskOrganizer;

    private final Optional<DesktopModeTaskRepository> mDesktopModeTaskRepository;

    private final WindowDecorViewModel<T> mWindowDecorationViewModel;

    private final WindowDecorViewModel mWindowDecorationViewModel;



    private final SparseArray<State<T>> mTasks = new SparseArray<>();

    private final SparseArray<T> mWindowDecorOfVanishedTasks = new SparseArray<>();

    private final SparseArray<State> mTasks = new SparseArray<>();



    private static class State<T extends AutoCloseable> {

    private static class State {

        RunningTaskInfo mTaskInfo;

        SurfaceControl mLeash;

        T mWindowDecoration;

    }



    public FreeformTaskListener(

            ShellInit shellInit,

            ShellTaskOrganizer shellTaskOrganizer,

            Optional<DesktopModeTaskRepository> desktopModeTaskRepository,

            WindowDecorViewModel<T> windowDecorationViewModel) {

            WindowDecorViewModel windowDecorationViewModel) {

        mShellTaskOrganizer = shellTaskOrganizer;

        mWindowDecorationViewModel = windowDecorationViewModel;

        mDesktopModeTaskRepository = desktopModeTaskRepository;
@@ -80,12 +71,17 @@ public class FreeformTaskListener<T extends AutoCloseable> 


    @Override

    public void onTaskAppeared(RunningTaskInfo taskInfo, SurfaceControl leash) {

        if (mTasks.get(taskInfo.taskId) != null) {

            throw new IllegalStateException("Task appeared more than once: #" + taskInfo.taskId);

        }

        ProtoLog.v(ShellProtoLogGroup.WM_SHELL_TASK_ORG, "Freeform Task Appeared: #%d",

                taskInfo.taskId);

        final State<T> state = createOrUpdateTaskState(taskInfo, leash);

        final State state = new State();

        state.mTaskInfo = taskInfo;

        state.mLeash = leash;

        mTasks.put(taskInfo.taskId, state);

        if (!Transitions.ENABLE_SHELL_TRANSITIONS) {

            SurfaceControl.Transaction t = new SurfaceControl.Transaction();

            state.mWindowDecoration =

            mWindowDecorationViewModel.createWindowDecoration(taskInfo, leash, t, t);

            t.apply();

        }
@@ -97,28 +93,8 @@ public class FreeformTaskListener<T extends AutoCloseable> 
        }

    }



    private State<T> createOrUpdateTaskState(RunningTaskInfo taskInfo, SurfaceControl leash) {

        State<T> state = mTasks.get(taskInfo.taskId);

        if (state != null) {

            updateTaskInfo(taskInfo);

            return state;

        }



        state = new State<>();

        state.mTaskInfo = taskInfo;

        state.mLeash = leash;

        mTasks.put(taskInfo.taskId, state);



        return state;

    }



    @Override

    public void onTaskVanished(RunningTaskInfo taskInfo) {

        final State<T> state = mTasks.get(taskInfo.taskId);

        if (state == null) {

            // This is possible if the transition happens before this method.

            return;

        }

        ProtoLog.v(ShellProtoLogGroup.WM_SHELL_TASK_ORG, "Freeform Task Vanished: #%d",

                taskInfo.taskId);

        mTasks.remove(taskInfo.taskId);
@@ -129,26 +105,18 @@ public class FreeformTaskListener<T extends AutoCloseable> 
            mDesktopModeTaskRepository.ifPresent(it -> it.removeActiveTask(taskInfo.taskId));

        }



        if (Transitions.ENABLE_SHELL_TRANSITIONS) {

            // Save window decorations of closing tasks so that we can hand them over to the

            // transition system if this method happens before the transition. In case where the

            // transition didn't happen, it'd be cleared when the next transition finished.

            if (state.mWindowDecoration != null) {

                mWindowDecorOfVanishedTasks.put(taskInfo.taskId, state.mWindowDecoration);

            }

            return;

        if (!Transitions.ENABLE_SHELL_TRANSITIONS) {

            mWindowDecorationViewModel.destroyWindowDecoration(taskInfo);

        }

        releaseWindowDecor(state.mWindowDecoration);

    }



    @Override

    public void onTaskInfoChanged(RunningTaskInfo taskInfo) {

        final State<T> state = updateTaskInfo(taskInfo);

        final State state = mTasks.get(taskInfo.taskId);

        state.mTaskInfo = taskInfo;

        ProtoLog.v(ShellProtoLogGroup.WM_SHELL_TASK_ORG, "Freeform Task Info Changed: #%d",

                taskInfo.taskId);

        if (state.mWindowDecoration != null) {

            mWindowDecorationViewModel.onTaskInfoChanged(state.mTaskInfo, state.mWindowDecoration);

        }

        mWindowDecorationViewModel.onTaskInfoChanged(state.mTaskInfo);



        if (DesktopModeStatus.IS_SUPPORTED) {

            if (taskInfo.isVisible) {
@@ -159,15 +127,6 @@ public class FreeformTaskListener<T extends AutoCloseable> 
        }

    }



    private State<T> updateTaskInfo(RunningTaskInfo taskInfo) {

        final State<T> state = mTasks.get(taskInfo.taskId);

        if (state == null) {

            throw new RuntimeException("Task info changed before appearing: #" + taskInfo.taskId);

        }

        state.mTaskInfo = taskInfo;

        return state;

    }



    @Override

    public void attachChildSurfaceToTask(int taskId, SurfaceControl.Builder b) {

        b.setParent(findTaskSurface(taskId));
@@ -186,103 +145,6 @@ public class FreeformTaskListener<T extends AutoCloseable> 
        return mTasks.get(taskId).mLeash;

    }



    /**

     * Creates a window decoration for a transition.

     *

     * @param change the change of this task transition that needs to have the task layer as the

     *               leash

     * @return {@code true} if it creates the window decoration; {@code false} otherwise

     */

    boolean createWindowDecoration(

            TransitionInfo.Change change,

            SurfaceControl.Transaction startT,

            SurfaceControl.Transaction finishT) {

        final State<T> state = createOrUpdateTaskState(change.getTaskInfo(), change.getLeash());

        if (state.mWindowDecoration != null) {

            return false;

        }

        state.mWindowDecoration = mWindowDecorationViewModel.createWindowDecoration(

                state.mTaskInfo, state.mLeash, startT, finishT);

        return true;

    }



    /**

     * Gives out the ownership of the task's window decoration. The given task is leaving (of has

     * left) this task listener. This is the transition system asking for the ownership.

     *

     * @param taskInfo the maximizing task

     * @return the window decor of the maximizing task if any

     */

    T giveWindowDecoration(

            RunningTaskInfo taskInfo,

            SurfaceControl.Transaction startT,

            SurfaceControl.Transaction finishT) {

        T windowDecor;

        final State<T> state = mTasks.get(taskInfo.taskId);

        if (state != null) {

            windowDecor = state.mWindowDecoration;

            state.mWindowDecoration = null;

        } else {

            windowDecor =

                    mWindowDecorOfVanishedTasks.removeReturnOld(taskInfo.taskId);

        }

        if (windowDecor == null) {

            return null;

        }

        mWindowDecorationViewModel.setupWindowDecorationForTransition(

                taskInfo, startT, finishT, windowDecor);

        return windowDecor;

    }



    /**

     * Adopt the incoming window decoration and lets the window decoration prepare for a transition.

     *

     * @param change the change of this task transition that needs to have the task layer as the

     *               leash

     * @param startT the start transaction of this transition

     * @param finishT the finish transaction of this transition

     * @param windowDecor the window decoration to adopt

     * @return {@code true} if it adopts the window decoration; {@code false} otherwise

     */

    boolean adoptWindowDecoration(

            TransitionInfo.Change change,

            SurfaceControl.Transaction startT,

            SurfaceControl.Transaction finishT,

            @Nullable AutoCloseable windowDecor) {

        final State<T> state = createOrUpdateTaskState(change.getTaskInfo(), change.getLeash());

        state.mWindowDecoration = mWindowDecorationViewModel.adoptWindowDecoration(windowDecor);

        if (state.mWindowDecoration != null) {

            mWindowDecorationViewModel.setupWindowDecorationForTransition(

                    state.mTaskInfo, startT, finishT, state.mWindowDecoration);

            return true;

        } else {

            state.mWindowDecoration = mWindowDecorationViewModel.createWindowDecoration(

                    state.mTaskInfo, state.mLeash, startT, finishT);

            return false;

        }

    }



    void onTaskTransitionFinished() {

        if (mWindowDecorOfVanishedTasks.size() == 0) {

            return;

        }

        ProtoLog.v(ShellProtoLogGroup.WM_SHELL_TRANSITIONS,

                "Clearing window decors of vanished tasks. There could be visual defects "

                + "if any of them is used later in transitions.");

        for (int i = 0; i < mWindowDecorOfVanishedTasks.size(); ++i) {

            releaseWindowDecor(mWindowDecorOfVanishedTasks.valueAt(i));

        }

        mWindowDecorOfVanishedTasks.clear();

    }



    private void releaseWindowDecor(T windowDecor) {

        try {

            windowDecor.close();

        } catch (Exception e) {

            Log.e(TAG, "Failed to release window decoration.", e);

        }

    }



    @Override

    public void dump(PrintWriter pw, String prefix) {

        final String innerPrefix = prefix + "  ";

libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionHandler.java

+2 −2
Original line number Diff line number Diff line
@@ -46,14 +46,14 @@ public class FreeformTaskTransitionHandler 
        implements Transitions.TransitionHandler, FreeformTaskTransitionStarter {



    private final Transitions mTransitions;

    private final WindowDecorViewModel<?> mWindowDecorViewModel;

    private final WindowDecorViewModel mWindowDecorViewModel;



    private final List<IBinder> mPendingTransitionTokens = new ArrayList<>();



    public FreeformTaskTransitionHandler(

            ShellInit shellInit,

            Transitions transitions,

            WindowDecorViewModel<?> windowDecorViewModel) {

            WindowDecorViewModel windowDecorViewModel) {

        mTransitions = transitions;

        mWindowDecorViewModel = windowDecorViewModel;

        if (Transitions.ENABLE_SHELL_TRANSITIONS) {

libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionObserver.java

+31 −102
Original line number Diff line number Diff line
@@ -16,13 +16,9 @@ 


package com.android.wm.shell.freeform;



import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;

import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;



import android.app.ActivityManager;

import android.content.Context;

import android.os.IBinder;

import android.util.Log;

import android.view.SurfaceControl;

import android.view.WindowManager;

import android.window.TransitionInfo;
@@ -31,9 +27,9 @@ import android.window.WindowContainerToken; 
import androidx.annotation.NonNull;

import androidx.annotation.VisibleForTesting;



import com.android.wm.shell.fullscreen.FullscreenTaskListener;

import com.android.wm.shell.sysui.ShellInit;

import com.android.wm.shell.transition.Transitions;

import com.android.wm.shell.windowdecor.WindowDecorViewModel;



import java.util.ArrayList;

import java.util.Collections;
@@ -47,23 +43,19 @@ import java.util.Map; 
 * be a part of transitions.

 */

public class FreeformTaskTransitionObserver implements Transitions.TransitionObserver {

    private static final String TAG = "FreeformTO";



    private final Transitions mTransitions;

    private final FreeformTaskListener<?> mFreeformTaskListener;

    private final FullscreenTaskListener<?> mFullscreenTaskListener;

    private final WindowDecorViewModel mWindowDecorViewModel;



    private final Map<IBinder, List<AutoCloseable>> mTransitionToWindowDecors = new HashMap<>();

    private final Map<IBinder, List<ActivityManager.RunningTaskInfo>> mTransitionToTaskInfo =

            new HashMap<>();



    public FreeformTaskTransitionObserver(

            Context context,

            ShellInit shellInit,

            Transitions transitions,

            FullscreenTaskListener<?> fullscreenTaskListener,

            FreeformTaskListener<?> freeformTaskListener) {

            WindowDecorViewModel windowDecorViewModel) {

        mTransitions = transitions;

        mFreeformTaskListener = freeformTaskListener;

        mFullscreenTaskListener = fullscreenTaskListener;

        mWindowDecorViewModel = windowDecorViewModel;

        if (Transitions.ENABLE_SHELL_TRANSITIONS && FreeformComponents.isFreeformEnabled(context)) {

            shellInit.addInitCallback(this::onInit, this);

        }
@@ -80,7 +72,7 @@ public class FreeformTaskTransitionObserver implements Transitions.TransitionObs 
            @NonNull TransitionInfo info,

            @NonNull SurfaceControl.Transaction startT,

            @NonNull SurfaceControl.Transaction finishT) {

        final ArrayList<AutoCloseable> windowDecors = new ArrayList<>();

        final ArrayList<ActivityManager.RunningTaskInfo> taskInfoList = new ArrayList<>();

        final ArrayList<WindowContainerToken> taskParents = new ArrayList<>();

        for (TransitionInfo.Change change : info.getChanges()) {

            if ((change.getFlags() & TransitionInfo.FLAG_IS_WALLPAPER) != 0) {
@@ -110,92 +102,40 @@ public class FreeformTaskTransitionObserver implements Transitions.TransitionObs 
                    onOpenTransitionReady(change, startT, finishT);

                    break;

                case WindowManager.TRANSIT_CLOSE: {

                    onCloseTransitionReady(change, windowDecors, startT, finishT);

                    taskInfoList.add(change.getTaskInfo());

                    onCloseTransitionReady(change, startT, finishT);

                    break;

                }

                case WindowManager.TRANSIT_CHANGE:

                    onChangeTransitionReady(info.getType(), change, startT, finishT);

                    onChangeTransitionReady(change, startT, finishT);

                    break;

            }

        }

        if (!windowDecors.isEmpty()) {

            mTransitionToWindowDecors.put(transition, windowDecors);

        }

        mTransitionToTaskInfo.put(transition, taskInfoList);

    }



    private void onOpenTransitionReady(

            TransitionInfo.Change change,

            SurfaceControl.Transaction startT,

            SurfaceControl.Transaction finishT) {

        switch (change.getTaskInfo().getWindowingMode()){

            case WINDOWING_MODE_FREEFORM:

                mFreeformTaskListener.createWindowDecoration(change, startT, finishT);

                break;

            case WINDOWING_MODE_FULLSCREEN:

                mFullscreenTaskListener.createWindowDecoration(change, startT, finishT);

                break;

        }

        mWindowDecorViewModel.createWindowDecoration(

                change.getTaskInfo(), change.getLeash(), startT, finishT);

    }



    private void onCloseTransitionReady(

            TransitionInfo.Change change,

            ArrayList<AutoCloseable> windowDecors,

            SurfaceControl.Transaction startT,

            SurfaceControl.Transaction finishT) {

        final AutoCloseable windowDecor;

        switch (change.getTaskInfo().getWindowingMode()) {

            case WINDOWING_MODE_FREEFORM:

                windowDecor = mFreeformTaskListener.giveWindowDecoration(change.getTaskInfo(),

                        startT, finishT);

                break;

            case WINDOWING_MODE_FULLSCREEN:

                windowDecor = mFullscreenTaskListener.giveWindowDecoration(change.getTaskInfo(),

                        startT, finishT);

                break;

            default:

                windowDecor = null;

        }

        if (windowDecor != null) {

            windowDecors.add(windowDecor);

        }

        mWindowDecorViewModel.setupWindowDecorationForTransition(

                change.getTaskInfo(), startT, finishT);

    }



    private void onChangeTransitionReady(

            int type,

            TransitionInfo.Change change,

            SurfaceControl.Transaction startT,

            SurfaceControl.Transaction finishT) {

        AutoCloseable windowDecor = null;



        boolean adopted = false;

        final ActivityManager.RunningTaskInfo taskInfo = change.getTaskInfo();

        if (taskInfo.getWindowingMode() == WINDOWING_MODE_FULLSCREEN) {

            windowDecor = mFreeformTaskListener.giveWindowDecoration(

                    change.getTaskInfo(), startT, finishT);

            if (windowDecor != null) {

                adopted = mFullscreenTaskListener.adoptWindowDecoration(

                        change, startT, finishT, windowDecor);

            } else {

                // will return false if it already has the window decor.

                adopted = mFullscreenTaskListener.createWindowDecoration(change, startT, finishT);

            }

        }



        if (taskInfo.getWindowingMode() == WINDOWING_MODE_FREEFORM) {

            windowDecor = mFullscreenTaskListener.giveWindowDecoration(

        mWindowDecorViewModel.setupWindowDecorationForTransition(

                change.getTaskInfo(), startT, finishT);

            if (windowDecor != null) {

                adopted = mFreeformTaskListener.adoptWindowDecoration(

                        change, startT, finishT, windowDecor);

            } else {

                // will return false if it already has the window decor.

                adopted = mFreeformTaskListener.createWindowDecoration(change, startT, finishT);

            }

        }



        if (!adopted) {

            releaseWindowDecor(windowDecor);

        }

    }



    @Override
@@ -203,43 +143,32 @@ public class FreeformTaskTransitionObserver implements Transitions.TransitionObs 


    @Override

    public void onTransitionMerged(@NonNull IBinder merged, @NonNull IBinder playing) {

        final List<AutoCloseable> windowDecorsOfMerged = mTransitionToWindowDecors.get(merged);

        if (windowDecorsOfMerged == null) {

        final List<ActivityManager.RunningTaskInfo> infoOfMerged =

                mTransitionToTaskInfo.get(merged);

        if (infoOfMerged == null) {

            // We are adding window decorations of the merged transition to them of the playing

            // transition so if there is none of them there is nothing to do.

            return;

        }

        mTransitionToWindowDecors.remove(merged);

        mTransitionToTaskInfo.remove(merged);



        final List<AutoCloseable> windowDecorsOfPlaying = mTransitionToWindowDecors.get(playing);

        if (windowDecorsOfPlaying != null) {

            windowDecorsOfPlaying.addAll(windowDecorsOfMerged);

        final List<ActivityManager.RunningTaskInfo> infoOfPlaying =

                mTransitionToTaskInfo.get(playing);

        if (infoOfPlaying != null) {

            infoOfPlaying.addAll(infoOfMerged);

        } else {

            mTransitionToWindowDecors.put(playing, windowDecorsOfMerged);

            mTransitionToTaskInfo.put(playing, infoOfMerged);

        }

    }



    @Override

    public void onTransitionFinished(@NonNull IBinder transition, boolean aborted) {

        final List<AutoCloseable> windowDecors = mTransitionToWindowDecors.getOrDefault(

                transition, Collections.emptyList());

        mTransitionToWindowDecors.remove(transition);

        final List<ActivityManager.RunningTaskInfo> taskInfo =

                mTransitionToTaskInfo.getOrDefault(transition, Collections.emptyList());

        mTransitionToTaskInfo.remove(transition);



        for (AutoCloseable windowDecor : windowDecors) {

            releaseWindowDecor(windowDecor);

        }

        mFullscreenTaskListener.onTaskTransitionFinished();

        mFreeformTaskListener.onTaskTransitionFinished();

    }



    private static void releaseWindowDecor(AutoCloseable windowDecor) {

        if (windowDecor == null) {

            return;

        }

        try {

            windowDecor.close();

        } catch (Exception e) {

            Log.e(TAG, "Failed to release window decoration.", e);

        for (int i = 0; i < taskInfo.size(); ++i) {

            mWindowDecorViewModel.destroyWindowDecoration(taskInfo.get(i));

        }

    }

}