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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.CallSuper;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.RequiresPermission;
import android.annotation.TestApi;
import android.app.ActivityManager;
import android.os.IBinder;
import android.os.RemoteException;
import android.view.SurfaceControl;
import com.android.internal.annotations.VisibleForTesting;
import java.util.List;
import java.util.concurrent.Executor;
/**
* Interface for ActivityTaskManager/WindowManager to delegate control of tasks.
* @hide
*/
@TestApi
public class TaskOrganizer extends WindowOrganizer {
private final ITaskOrganizerController mTaskOrganizerController;
// Callbacks WM Core are posted on this executor if it isn't null, otherwise direct calls are
// made on the incoming binder call.
private final Executor mExecutor;
public TaskOrganizer() {
this(null /*taskOrganizerController*/, null /*executor*/);
}
/** @hide */
@VisibleForTesting
public TaskOrganizer(ITaskOrganizerController taskOrganizerController, Executor executor) {
mExecutor = executor != null ? executor : command -> command.run();
mTaskOrganizerController = taskOrganizerController != null
? taskOrganizerController : getController();
}
/**
* Register a TaskOrganizer to manage tasks as they enter a supported windowing mode.
*
* @return a list of the tasks that should be managed by the organizer, not including tasks
* created via {@link #createRootTask}.
*/
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@CallSuper
@NonNull
public List<TaskAppearedInfo> registerOrganizer() {
try {
return mTaskOrganizerController.registerTaskOrganizer(mInterface).getList();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Unregisters a previously registered task organizer. */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@CallSuper
public void unregisterOrganizer() {
try {
mTaskOrganizerController.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.
* @param displayId The display to create the root task on.
* @param windowingMode Windowing mode to put the root task in.
* @param launchCookie Launch cookie to associate with the task so that is can be identified
* when the {@link ITaskOrganizer#onTaskAppeared} callback is called.
*/
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
@Nullable
public void createRootTask(int displayId, int windowingMode, @Nullable IBinder launchCookie) {
try {
mTaskOrganizerController.createRootTask(displayId, windowingMode, launchCookie);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/** Deletes a persistent root task in WM */
@RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS)
public boolean deleteRootTask(@NonNull WindowContainerToken task) {
try {
return mTaskOrganizerController.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 List<ActivityManager.RunningTaskInfo> getChildTasks(
@NonNull WindowContainerToken parent, @NonNull int[] activityTypes) {
try {
return mTaskOrganizerController.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 List<ActivityManager.RunningTaskInfo> getRootTasks(
int displayId, @NonNull int[] activityTypes) {
try {
return mTaskOrganizerController.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 WindowContainerToken getImeTarget(int display) {
try {
return mTaskOrganizerController.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 void setLaunchRoot(int displayId, @NonNull WindowContainerToken root) {
try {
mTaskOrganizerController.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(@NonNull WindowContainerToken task,
boolean interceptBackPressed) {
try {
mTaskOrganizerController.setInterceptBackPressedOnTaskRoot(task, interceptBackPressed);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
private final ITaskOrganizer mInterface = new ITaskOrganizer.Stub() {
@Override
public void onTaskAppeared(ActivityManager.RunningTaskInfo taskInfo, SurfaceControl leash) {
mExecutor.execute(() -> TaskOrganizer.this.onTaskAppeared(taskInfo, leash));
}
@Override
public void onTaskVanished(ActivityManager.RunningTaskInfo taskInfo) {
mExecutor.execute(() -> TaskOrganizer.this.onTaskVanished(taskInfo));
}
@Override
public void onTaskInfoChanged(ActivityManager.RunningTaskInfo info) {
mExecutor.execute(() -> TaskOrganizer.this.onTaskInfoChanged(info));
}
@Override
public void onBackPressedOnTaskRoot(ActivityManager.RunningTaskInfo info) {
mExecutor.execute(() -> TaskOrganizer.this.onBackPressedOnTaskRoot(info));
}
};
private ITaskOrganizerController getController() {
try {
return getWindowOrganizerController().getTaskOrganizerController();
} catch (RemoteException e) {
return null;
}
}
}
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