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/*
* Copyright (C) 2023 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.os.Build.VERSION_CODES.UPSIDE_DOWN_CAKE;
import android.annotation.NonNull;
import android.annotation.RequiresApi;
import android.annotation.SystemApi;
import android.app.ActivityOptions;
import android.car.builtin.util.Slogf;
import android.content.ComponentName;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.ArrayMap;
import android.util.ArraySet;
import com.android.car.internal.util.IndentingPrintWriter;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Implementation of {@link CarActivityInterceptorUpdatable}.
*
* @hide
*/
@RequiresApi(UPSIDE_DOWN_CAKE)
@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
public final class CarActivityInterceptorUpdatableImpl implements CarActivityInterceptorUpdatable {
public static final String TAG = CarActivityInterceptorUpdatableImpl.class.getSimpleName();
private final Object mLock = new Object();
@GuardedBy("mLock")
private final ArrayMap<ComponentName, IBinder> mActivityToRootTaskMap = new ArrayMap<>();
@GuardedBy("mLock")
private final Set<IBinder> mKnownRootTasks = new ArraySet<>();
private final CarActivityInterceptorInterface mBuiltIn;
public CarActivityInterceptorUpdatableImpl(CarActivityInterceptorInterface builtInInterface) {
mBuiltIn = builtInInterface;
}
@Override
public ActivityInterceptResultWrapper onInterceptActivityLaunch(
ActivityInterceptorInfoWrapper info) {
if (info.getIntent() == null) {
return null;
}
ComponentName componentName = info.getIntent().getComponent();
synchronized (mLock) {
int keyIndex = mActivityToRootTaskMap.indexOfKey(componentName);
if (keyIndex >= 0) {
IBinder rootTaskToken = mActivityToRootTaskMap.valueAt(keyIndex);
if (!isRootTaskUserSameAsActivityUser(rootTaskToken, info)) {
return null;
}
ActivityOptionsWrapper optionsWrapper = info.getCheckedOptions();
if (optionsWrapper == null) {
optionsWrapper = ActivityOptionsWrapper.create(ActivityOptions.makeBasic());
}
optionsWrapper.setLaunchRootTask(rootTaskToken);
return ActivityInterceptResultWrapper.create(info.getIntent(),
optionsWrapper.getOptions());
}
}
return null;
}
private boolean isRootTaskUserSameAsActivityUser(IBinder rootTaskToken,
ActivityInterceptorInfoWrapper activityInterceptorInfoWrapper) {
TaskWrapper rootTask = TaskWrapper.createFromToken(rootTaskToken);
int userIdFromActivity = activityInterceptorInfoWrapper.getUserId();
int userIdFromRootTask = mBuiltIn.getUserAssignedToDisplay(rootTask
.getTaskDisplayArea().getDisplay().getDisplayId());
if (userIdFromActivity == userIdFromRootTask) {
return true;
}
Slogf.w(TAG, "The user id of launched activity (%d) doesn't match the "
+ "user id which the display (which the root task is added in) is "
+ "assigned to (%d).", userIdFromActivity, userIdFromRootTask);
return false;
}
/**
* Sets the given {@code activities} to be persistent on the root task corresponding to the
* given {@code rootTaskToken}.
* <p>
* If {@code rootTaskToken} is {@code null}, then the earlier root task associations of the
* given {@code activities} will be removed.
*
* @param activities the list of activities which have to be persisted.
* @param rootTaskToken the binder token of the root task which the activities have to be
* persisted on.
*/
public void setPersistentActivityOnRootTask(@NonNull List<ComponentName> activities,
IBinder rootTaskToken) {
synchronized (mLock) {
if (rootTaskToken == null) {
int activitiesNum = activities.size();
for (int i = 0; i < activitiesNum; i++) {
mActivityToRootTaskMap.remove(activities.get(i));
}
return;
}
int activitiesNum = activities.size();
for (int i = 0; i < activitiesNum; i++) {
mActivityToRootTaskMap.put(activities.get(i), rootTaskToken);
}
if (!mKnownRootTasks.contains(rootTaskToken)) {
// Seeing the token for the first time, set the listener
removeRootTaskTokenOnDeath(rootTaskToken);
mKnownRootTasks.add(rootTaskToken);
}
}
}
private void removeRootTaskTokenOnDeath(IBinder rootTaskToken) {
try {
rootTaskToken.linkToDeath(() -> removeRootTaskToken(rootTaskToken), /* flags= */ 0);
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
private void removeRootTaskToken(IBinder rootTaskToken) {
synchronized (mLock) {
mKnownRootTasks.remove(rootTaskToken);
// remove all the persistent activities for this root task token from the map,
// because the root task itself is removed.
Iterator<Map.Entry<ComponentName, IBinder>> iterator =
mActivityToRootTaskMap.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<ComponentName, IBinder> entry = iterator.next();
if (entry.getValue().equals(rootTaskToken)) {
iterator.remove();
}
}
}
}
@VisibleForTesting
public Map<ComponentName, IBinder> getActivityToRootTaskMap() {
synchronized (mLock) {
return mActivityToRootTaskMap;
}
}
/**
* Dump {code CarActivityInterceptorUpdatableImpl#mActivityToRootTaskMap}
*/
public void dump(IndentingPrintWriter writer) {
writer.println(TAG);
writer.increaseIndent();
writer.println("Activity to root task map:");
writer.increaseIndent();
synchronized (mLock) {
if (mActivityToRootTaskMap.size() == 0) {
writer.println("No activity persisted on a root task");
} else {
for (int i = 0; i < mActivityToRootTaskMap.size(); i++) {
writer.println("Activity name: " + mActivityToRootTaskMap.keyAt(i)
+ " - Binder object: " + mActivityToRootTaskMap.valueAt(i));
}
}
}
writer.decreaseIndent();
writer.decreaseIndent();
}
}
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