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/*
* Copyright (C) 2020 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 android.window;
import android.annotation.BinderThread;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.RequiresPermission;
import android.annotation.TestApi;
import android.app.ActivityManager;
import android.os.RemoteException;
import android.util.Singleton;
import android.view.SurfaceControl;
import java.util.List;
/**
* Interface for ActivityTaskManager/WindowManager to delegate control of tasks.
* @hide
*/
@TestApi
public class TaskOrganizer extends WindowOrganizer {
/**
* Register a TaskOrganizer to manage tasks as they enter the given windowing mode.
* If there was already a TaskOrganizer for this windowing mode it will be evicted
* and receive taskVanished callbacks in the process.
*/
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
public final void registerOrganizer(int windowingMode) {
try {
getController().registerTaskOrganizer(mInterface, windowingMode);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Unregisters a previously registered task organizer. */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
public final void unregisterOrganizer() {
try {
getController().unregisterTaskOrganizer(mInterface);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Called when a task with the registered windowing mode can be controlled by this task
* organizer. For non-root tasks, the leash may initially be hidden so it is up to the organizer
* to show this task.
*/
@BinderThread
public void onTaskAppeared(@NonNull ActivityManager.RunningTaskInfo taskInfo,
@NonNull SurfaceControl leash) {}
@BinderThread
public void onTaskVanished(@NonNull ActivityManager.RunningTaskInfo taskInfo) {}
@BinderThread
public void onTaskInfoChanged(@NonNull ActivityManager.RunningTaskInfo taskInfo) {}
@BinderThread
public void onBackPressedOnTaskRoot(@NonNull ActivityManager.RunningTaskInfo taskInfo) {}
/** Creates a persistent root task in WM for a particular windowing-mode. */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@Nullable
public static ActivityManager.RunningTaskInfo createRootTask(int displayId, int windowingMode) {
try {
return getController().createRootTask(displayId, windowingMode);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Deletes a persistent root task in WM */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
public static boolean deleteRootTask(@NonNull WindowContainerToken task) {
try {
return getController().deleteRootTask(task);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Gets direct child tasks (ordered from top-to-bottom) */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@Nullable
public static List<ActivityManager.RunningTaskInfo> getChildTasks(
@NonNull WindowContainerToken parent, @NonNull int[] activityTypes) {
try {
return getController().getChildTasks(parent, activityTypes);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Gets all root tasks on a display (ordered from top-to-bottom) */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@Nullable
public static List<ActivityManager.RunningTaskInfo> getRootTasks(
int displayId, @NonNull int[] activityTypes) {
try {
return getController().getRootTasks(displayId, activityTypes);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Get the root task which contains the current ime target */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@Nullable
public static WindowContainerToken getImeTarget(int display) {
try {
return getController().getImeTarget(display);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Set's the root task to launch new tasks into on a display. {@code null} means no launch
* root and thus new tasks just end up directly on the display.
*/
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
public static void setLaunchRoot(int displayId, @NonNull WindowContainerToken root) {
try {
getController().setLaunchRoot(displayId, root);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Requests that the given task organizer is notified when back is pressed on the root activity
* of one of its controlled tasks.
*/
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
public void setInterceptBackPressedOnTaskRoot(boolean interceptBackPressed) {
try {
getController().setInterceptBackPressedOnTaskRoot(mInterface, interceptBackPressed);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
private final ITaskOrganizer mInterface = new ITaskOrganizer.Stub() {
@Override
public void onTaskAppeared(ActivityManager.RunningTaskInfo taskInfo, SurfaceControl leash) {
TaskOrganizer.this.onTaskAppeared(taskInfo, leash);
}
@Override
public void onTaskVanished(ActivityManager.RunningTaskInfo taskInfo) {
TaskOrganizer.this.onTaskVanished(taskInfo);
}
@Override
public void onTaskInfoChanged(ActivityManager.RunningTaskInfo info) {
TaskOrganizer.this.onTaskInfoChanged(info);
}
@Override
public void onBackPressedOnTaskRoot(ActivityManager.RunningTaskInfo info) {
TaskOrganizer.this.onBackPressedOnTaskRoot(info);
}
};
private static ITaskOrganizerController getController() {
return ITaskOrganizerControllerSingleton.get();
}
private static final Singleton<ITaskOrganizerController> ITaskOrganizerControllerSingleton =
new Singleton<ITaskOrganizerController>() {
@Override
protected ITaskOrganizerController create() {
try {
return getWindowOrganizerController().getTaskOrganizerController();
} catch (RemoteException e) {
return null;
}
}
};
}
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