Introduce TaskOrganizer
A first take at the TaskOrganizer API for allowing SysUI to control task presentation.
In this CL we introduce the first two primitives:
1. The interface itself for implementation by SysUI
2. Support for organizing a given windowing mode (but atm really only PIP)
We include a sample app that manages the PIP from an APPLICATION_OVERLAY window.
Bug: 139371701
Test: wmtests/TaskOrganizerTests. TaskOrganizerPipTest
Change-Id: I44a8ed311bc5f06285bba2c6ff3b37a7d19a9190
diff --git a/services/core/java/com/android/server/wm/TaskOrganizerController.java b/services/core/java/com/android/server/wm/TaskOrganizerController.java
new file mode 100644
index 0000000..283be40
--- /dev/null
+++ b/services/core/java/com/android/server/wm/TaskOrganizerController.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2019 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.server.wm;
+
+import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
+
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Slog;
+import android.view.ITaskOrganizer;
+import android.view.SurfaceControl;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+
+/**
+ * Stores the TaskOrganizers associated with a given windowing mode and
+ * their associated state.
+ */
+class TaskOrganizerController {
+ private static final String TAG = "TaskOrganizerController";
+
+ private WindowManagerGlobalLock mGlobalLock;
+
+ private class DeathRecipient implements IBinder.DeathRecipient {
+ int mWindowingMode;
+ ITaskOrganizer mTaskOrganizer;
+
+ DeathRecipient(ITaskOrganizer organizer, int windowingMode) {
+ mTaskOrganizer = organizer;
+ mWindowingMode = windowingMode;
+ }
+
+ @Override
+ public void binderDied() {
+ synchronized (mGlobalLock) {
+ final TaskOrganizerState state = mTaskOrganizerStates.get(mTaskOrganizer);
+ for (int i = 0; i < state.mOrganizedTasks.size(); i++) {
+ state.mOrganizedTasks.get(i).taskOrganizerDied();
+ }
+ mTaskOrganizerStates.remove(mTaskOrganizer);
+ if (mTaskOrganizersForWindowingMode.get(mWindowingMode) == mTaskOrganizer) {
+ mTaskOrganizersForWindowingMode.remove(mWindowingMode);
+ }
+ }
+ }
+ };
+
+ class TaskOrganizerState {
+ ITaskOrganizer mOrganizer;
+ DeathRecipient mDeathRecipient;
+
+ ArrayList<Task> mOrganizedTasks = new ArrayList<>();
+
+ void addTask(Task t) {
+ mOrganizedTasks.add(t);
+ }
+
+ void removeTask(Task t) {
+ mOrganizedTasks.remove(t);
+ }
+
+ TaskOrganizerState(ITaskOrganizer organizer, DeathRecipient deathRecipient) {
+ mOrganizer = organizer;
+ mDeathRecipient = deathRecipient;
+ }
+ };
+
+
+ final HashMap<Integer, TaskOrganizerState> mTaskOrganizersForWindowingMode = new HashMap();
+ final HashMap<ITaskOrganizer, TaskOrganizerState> mTaskOrganizerStates = new HashMap();
+
+ final HashMap<Integer, ITaskOrganizer> mTaskOrganizersByPendingSyncId = new HashMap();
+
+ final ActivityTaskManagerService mService;
+
+ TaskOrganizerController(ActivityTaskManagerService atm, WindowManagerGlobalLock lock) {
+ mService = atm;
+ mGlobalLock = lock;
+ }
+
+ private void clearIfNeeded(int windowingMode) {
+ final TaskOrganizerState oldState = mTaskOrganizersForWindowingMode.get(windowingMode);
+ if (oldState != null) {
+ oldState.mOrganizer.asBinder().unlinkToDeath(oldState.mDeathRecipient, 0);
+ }
+ }
+
+ /**
+ * 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.
+ */
+ void registerTaskOrganizer(ITaskOrganizer organizer, int windowingMode) {
+ if (windowingMode != WINDOWING_MODE_PINNED) {
+ throw new UnsupportedOperationException(
+ "As of now only Pinned windowing mode is supported for registerTaskOrganizer");
+
+ }
+ clearIfNeeded(windowingMode);
+ DeathRecipient dr = new DeathRecipient(organizer, windowingMode);
+ try {
+ organizer.asBinder().linkToDeath(dr, 0);
+ } catch (RemoteException e) {
+ Slog.e(TAG, "TaskOrganizer failed to register death recipient");
+ }
+
+ final TaskOrganizerState state = new TaskOrganizerState(organizer, dr);
+ mTaskOrganizersForWindowingMode.put(windowingMode, state);
+
+ mTaskOrganizerStates.put(organizer, state);
+ }
+
+ ITaskOrganizer getTaskOrganizer(int windowingMode) {
+ final TaskOrganizerState state = mTaskOrganizersForWindowingMode.get(windowingMode);
+ if (state == null) {
+ return null;
+ }
+ return state.mOrganizer;
+ }
+
+ private void sendTaskAppeared(ITaskOrganizer organizer, Task task) {
+ try {
+ organizer.taskAppeared(task.getRemoteToken(), task.getTaskInfo());
+ } catch (Exception e) {
+ Slog.e(TAG, "Exception sending taskAppeared callback" + e);
+ }
+ }
+
+ private void sendTaskVanished(ITaskOrganizer organizer, Task task) {
+ try {
+ organizer.taskVanished(task.getRemoteToken());
+ } catch (Exception e) {
+ Slog.e(TAG, "Exception sending taskVanished callback" + e);
+ }
+ }
+
+ void onTaskAppeared(ITaskOrganizer organizer, Task task) {
+ TaskOrganizerState state = mTaskOrganizerStates.get(organizer);
+
+ state.addTask(task);
+ sendTaskAppeared(organizer, task);
+ }
+
+ void onTaskVanished(ITaskOrganizer organizer, Task task) {
+ final TaskOrganizerState state = mTaskOrganizerStates.get(organizer);
+ sendTaskVanished(organizer, task);
+
+ // This could trigger TaskAppeared for other tasks in the same stack so make sure
+ // we do this AFTER sending taskVanished.
+ state.removeTask(task);
+ }
+}