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/*
* Copyright (C) 2014 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.systemui.recents;
import android.app.ActivityManager;
import android.app.UiModeManager;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Point;
import android.graphics.Rect;
import android.hardware.display.DisplayManager;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.provider.Settings;
import android.util.EventLog;
import android.util.Log;
import android.view.Display;
import android.widget.Toast;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.logging.MetricsProto.MetricsEvent;
import com.android.systemui.EventLogConstants;
import com.android.systemui.EventLogTags;
import com.android.systemui.R;
import com.android.systemui.RecentsComponent;
import com.android.systemui.SystemUI;
import com.android.systemui.recents.events.EventBus;
import com.android.systemui.recents.events.activity.ConfigurationChangedEvent;
import com.android.systemui.recents.events.activity.DockedTopTaskEvent;
import com.android.systemui.recents.events.activity.RecentsActivityStartingEvent;
import com.android.systemui.recents.events.component.RecentsVisibilityChangedEvent;
import com.android.systemui.recents.events.component.ScreenPinningRequestEvent;
import com.android.systemui.recents.events.ui.RecentsDrawnEvent;
import com.android.systemui.recents.misc.SystemServicesProxy;
import com.android.systemui.recents.model.RecentsTaskLoader;
import com.android.systemui.recents.tv.RecentsTvImpl;
import com.android.systemui.stackdivider.Divider;
import java.util.ArrayList;
/**
* An implementation of the SystemUI recents component, which supports both system and secondary
* users.
*/
public class Recents extends SystemUI
implements RecentsComponent {
private final static String TAG = "Recents";
private final static boolean DEBUG = false;
public final static int EVENT_BUS_PRIORITY = 1;
public final static int BIND_TO_SYSTEM_USER_RETRY_DELAY = 5000;
public final static int RECENTS_GROW_TARGET_INVALID = -1;
// Purely for experimentation
private final static String RECENTS_OVERRIDE_SYSPROP_KEY = "persist.recents_override_pkg";
private final static String ACTION_SHOW_RECENTS = "com.android.systemui.recents.ACTION_SHOW";
private final static String ACTION_HIDE_RECENTS = "com.android.systemui.recents.ACTION_HIDE";
private final static String ACTION_TOGGLE_RECENTS = "com.android.systemui.recents.ACTION_TOGGLE";
private static final String COUNTER_WINDOW_SUPPORTED = "window_enter_supported";
private static final String COUNTER_WINDOW_UNSUPPORTED = "window_enter_unsupported";
private static final String COUNTER_WINDOW_INCOMPATIBLE = "window_enter_incompatible";
private static SystemServicesProxy sSystemServicesProxy;
private static RecentsDebugFlags sDebugFlags;
private static RecentsTaskLoader sTaskLoader;
private static RecentsConfiguration sConfiguration;
// For experiments only, allows another package to handle recents if it is defined in the system
// properties. This is limited to show/toggle/hide, and does not tie into the ActivityManager,
// and does not reside in the home stack.
private String mOverrideRecentsPackageName;
private Handler mHandler;
private RecentsImpl mImpl;
private int mDraggingInRecentsCurrentUser;
// Only For system user, this is the callbacks instance we return to each secondary user
private RecentsSystemUser mSystemToUserCallbacks;
// Only for secondary users, this is the callbacks instance provided by the system user to make
// calls back
private IRecentsSystemUserCallbacks mUserToSystemCallbacks;
// The set of runnables to run after binding to the system user's service.
private final ArrayList<Runnable> mOnConnectRunnables = new ArrayList<>();
// Only for secondary users, this is the death handler for the binder from the system user
private final IBinder.DeathRecipient mUserToSystemCallbacksDeathRcpt = new IBinder.DeathRecipient() {
@Override
public void binderDied() {
mUserToSystemCallbacks = null;
EventLog.writeEvent(EventLogTags.SYSUI_RECENTS_CONNECTION,
EventLogConstants.SYSUI_RECENTS_CONNECTION_USER_SYSTEM_UNBOUND,
sSystemServicesProxy.getProcessUser());
// Retry after a fixed duration
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
registerWithSystemUser();
}
}, BIND_TO_SYSTEM_USER_RETRY_DELAY);
}
};
// Only for secondary users, this is the service connection we use to connect to the system user
private final ServiceConnection mUserToSystemServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
if (service != null) {
mUserToSystemCallbacks = IRecentsSystemUserCallbacks.Stub.asInterface(
service);
EventLog.writeEvent(EventLogTags.SYSUI_RECENTS_CONNECTION,
EventLogConstants.SYSUI_RECENTS_CONNECTION_USER_SYSTEM_BOUND,
sSystemServicesProxy.getProcessUser());
// Listen for system user's death, so that we can reconnect later
try {
service.linkToDeath(mUserToSystemCallbacksDeathRcpt, 0);
} catch (RemoteException e) {
Log.e(TAG, "Lost connection to (System) SystemUI", e);
}
// Run each of the queued runnables
runAndFlushOnConnectRunnables();
}
// Unbind ourselves now that we've registered our callbacks. The
// binder to the system user are still valid at this point.
mContext.unbindService(this);
}
@Override
public void onServiceDisconnected(ComponentName name) {
// Do nothing
}
};
/**
* Returns the callbacks interface that non-system users can call.
*/
public IBinder getSystemUserCallbacks() {
return mSystemToUserCallbacks;
}
public static RecentsTaskLoader getTaskLoader() {
return sTaskLoader;
}
public static SystemServicesProxy getSystemServices() {
return sSystemServicesProxy;
}
public static RecentsConfiguration getConfiguration() {
return sConfiguration;
}
public static RecentsDebugFlags getDebugFlags() {
return sDebugFlags;
}
@Override
public void start() {
sDebugFlags = new RecentsDebugFlags(mContext);
sSystemServicesProxy = SystemServicesProxy.getInstance(mContext);
sTaskLoader = new RecentsTaskLoader(mContext);
sConfiguration = new RecentsConfiguration(mContext);
mHandler = new Handler();
UiModeManager uiModeManager = (UiModeManager) mContext.
getSystemService(Context.UI_MODE_SERVICE);
if (uiModeManager.getCurrentModeType() == Configuration.UI_MODE_TYPE_TELEVISION) {
mImpl = new RecentsTvImpl(mContext);
} else {
mImpl = new RecentsImpl(mContext);
}
// Check if there is a recents override package
if ("userdebug".equals(Build.TYPE) || "eng".equals(Build.TYPE)) {
String cnStr = SystemProperties.get(RECENTS_OVERRIDE_SYSPROP_KEY);
if (!cnStr.isEmpty()) {
mOverrideRecentsPackageName = cnStr;
}
}
// Register with the event bus
EventBus.getDefault().register(this, EVENT_BUS_PRIORITY);
EventBus.getDefault().register(sSystemServicesProxy, EVENT_BUS_PRIORITY);
EventBus.getDefault().register(sTaskLoader, EVENT_BUS_PRIORITY);
// Due to the fact that RecentsActivity is per-user, we need to establish and interface for
// the system user's Recents component to pass events (like show/hide/toggleRecents) to the
// secondary user, and vice versa (like visibility change, screen pinning).
final int processUser = sSystemServicesProxy.getProcessUser();
if (sSystemServicesProxy.isSystemUser(processUser)) {
// For the system user, initialize an instance of the interface that we can pass to the
// secondary user
mSystemToUserCallbacks = new RecentsSystemUser(mContext, mImpl);
} else {
// For the secondary user, bind to the primary user's service to get a persistent
// interface to register its implementation and to later update its state
registerWithSystemUser();
}
putComponent(Recents.class, this);
}
@Override
public void onBootCompleted() {
mImpl.onBootCompleted();
}
/**
* Shows the Recents.
*/
@Override
public void showRecents(boolean triggeredFromAltTab, boolean fromHome) {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
if (proxyToOverridePackage(ACTION_SHOW_RECENTS)) {
return;
}
int recentsGrowTarget = getComponent(Divider.class).getView().growsRecents();
int currentUser = sSystemServicesProxy.getCurrentUser();
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.showRecents(triggeredFromAltTab, false /* draggingInRecents */,
true /* animate */, false /* reloadTasks */, fromHome, recentsGrowTarget);
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.showRecents(triggeredFromAltTab, false /* draggingInRecents */,
true /* animate */, false /* reloadTasks */, fromHome,
recentsGrowTarget);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
}
/**
* Hides the Recents.
*/
@Override
public void hideRecents(boolean triggeredFromAltTab, boolean triggeredFromHomeKey) {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
if (proxyToOverridePackage(ACTION_HIDE_RECENTS)) {
return;
}
int currentUser = sSystemServicesProxy.getCurrentUser();
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.hideRecents(triggeredFromAltTab, triggeredFromHomeKey);
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.hideRecents(triggeredFromAltTab, triggeredFromHomeKey);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
}
/**
* Toggles the Recents activity.
*/
@Override
public void toggleRecents(Display display) {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
if (proxyToOverridePackage(ACTION_TOGGLE_RECENTS)) {
return;
}
int growTarget = getComponent(Divider.class).getView().growsRecents();
int currentUser = sSystemServicesProxy.getCurrentUser();
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.toggleRecents(growTarget);
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.toggleRecents(growTarget);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
}
/**
* Preloads info for the Recents activity.
*/
@Override
public void preloadRecents() {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
int currentUser = sSystemServicesProxy.getCurrentUser();
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.preloadRecents();
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.preloadRecents();
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
}
@Override
public void cancelPreloadingRecents() {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
int currentUser = sSystemServicesProxy.getCurrentUser();
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.cancelPreloadingRecents();
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.cancelPreloadingRecents();
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
}
@Override
public boolean dockTopTask(int dragMode, int stackCreateMode, Rect initialBounds,
int metricsDockAction) {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return false;
}
Point realSize = new Point();
if (initialBounds == null) {
mContext.getSystemService(DisplayManager.class).getDisplay(Display.DEFAULT_DISPLAY)
.getRealSize(realSize);
initialBounds = new Rect(0, 0, realSize.x, realSize.y);
}
int currentUser = sSystemServicesProxy.getCurrentUser();
SystemServicesProxy ssp = Recents.getSystemServices();
ActivityManager.RunningTaskInfo runningTask = ssp.getRunningTask();
boolean screenPinningActive = ssp.isScreenPinningActive();
boolean isRunningTaskInHomeStack = runningTask != null &&
SystemServicesProxy.isHomeStack(runningTask.stackId);
if (runningTask != null && !isRunningTaskInHomeStack && !screenPinningActive) {
logDockAttempt(mContext, runningTask.topActivity, runningTask.resizeMode);
if (runningTask.isDockable) {
if (metricsDockAction != -1) {
MetricsLogger.action(mContext, metricsDockAction,
runningTask.topActivity.flattenToShortString());
}
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.dockTopTask(runningTask.id, dragMode, stackCreateMode, initialBounds);
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.dockTopTask(runningTask.id, dragMode, stackCreateMode,
initialBounds);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
mDraggingInRecentsCurrentUser = currentUser;
return true;
} else {
Toast.makeText(mContext, R.string.recents_incompatible_app_message,
Toast.LENGTH_SHORT).show();
return false;
}
} else {
return false;
}
}
public static void logDockAttempt(Context ctx, ComponentName activity, int resizeMode) {
if (resizeMode == ActivityInfo.RESIZE_MODE_UNRESIZEABLE) {
MetricsLogger.action(ctx, MetricsEvent.ACTION_WINDOW_DOCK_UNRESIZABLE,
activity.flattenToShortString());
}
MetricsLogger.count(ctx, getMetricsCounterForResizeMode(resizeMode), 1);
}
private static String getMetricsCounterForResizeMode(int resizeMode) {
switch (resizeMode) {
case ActivityInfo.RESIZE_MODE_FORCE_RESIZEABLE:
return COUNTER_WINDOW_UNSUPPORTED;
case ActivityInfo.RESIZE_MODE_RESIZEABLE:
case ActivityInfo.RESIZE_MODE_RESIZEABLE_AND_PIPABLE:
return COUNTER_WINDOW_SUPPORTED;
default:
return COUNTER_WINDOW_INCOMPATIBLE;
}
}
@Override
public void onDraggingInRecents(float distanceFromTop) {
if (sSystemServicesProxy.isSystemUser(mDraggingInRecentsCurrentUser)) {
mImpl.onDraggingInRecents(distanceFromTop);
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(
mDraggingInRecentsCurrentUser);
if (callbacks != null) {
try {
callbacks.onDraggingInRecents(distanceFromTop);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: "
+ mDraggingInRecentsCurrentUser);
}
}
}
}
@Override
public void onDraggingInRecentsEnded(float velocity) {
if (sSystemServicesProxy.isSystemUser(mDraggingInRecentsCurrentUser)) {
mImpl.onDraggingInRecentsEnded(velocity);
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(
mDraggingInRecentsCurrentUser);
if (callbacks != null) {
try {
callbacks.onDraggingInRecentsEnded(velocity);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: "
+ mDraggingInRecentsCurrentUser);
}
}
}
}
@Override
public void showNextAffiliatedTask() {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
mImpl.showNextAffiliatedTask();
}
@Override
public void showPrevAffiliatedTask() {
// Ensure the device has been provisioned before allowing the user to interact with
// recents
if (!isUserSetup()) {
return;
}
mImpl.showPrevAffiliatedTask();
}
/**
* Updates on configuration change.
*/
public void onConfigurationChanged(Configuration newConfig) {
int currentUser = sSystemServicesProxy.getCurrentUser();
if (sSystemServicesProxy.isSystemUser(currentUser)) {
mImpl.onConfigurationChanged();
} else {
if (mSystemToUserCallbacks != null) {
IRecentsNonSystemUserCallbacks callbacks =
mSystemToUserCallbacks.getNonSystemUserRecentsForUser(currentUser);
if (callbacks != null) {
try {
callbacks.onConfigurationChanged();
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
} else {
Log.e(TAG, "No SystemUI callbacks found for user: " + currentUser);
}
}
}
}
/**
* Handle Recents activity visibility changed.
*/
public final void onBusEvent(final RecentsVisibilityChangedEvent event) {
SystemServicesProxy ssp = Recents.getSystemServices();
int processUser = ssp.getProcessUser();
if (ssp.isSystemUser(processUser)) {
mImpl.onVisibilityChanged(event.applicationContext, event.visible);
} else {
postToSystemUser(new Runnable() {
@Override
public void run() {
try {
mUserToSystemCallbacks.updateRecentsVisibility(event.visible);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
}
});
}
}
/**
* Handle screen pinning request.
*/
public final void onBusEvent(final ScreenPinningRequestEvent event) {
int processUser = sSystemServicesProxy.getProcessUser();
if (sSystemServicesProxy.isSystemUser(processUser)) {
mImpl.onStartScreenPinning(event.applicationContext, event.taskId);
} else {
postToSystemUser(new Runnable() {
@Override
public void run() {
try {
mUserToSystemCallbacks.startScreenPinning(event.taskId);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
}
});
}
}
public final void onBusEvent(final RecentsDrawnEvent event) {
int processUser = sSystemServicesProxy.getProcessUser();
if (!sSystemServicesProxy.isSystemUser(processUser)) {
postToSystemUser(new Runnable() {
@Override
public void run() {
try {
mUserToSystemCallbacks.sendRecentsDrawnEvent();
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
}
});
}
}
public final void onBusEvent(final DockedTopTaskEvent event) {
int processUser = sSystemServicesProxy.getProcessUser();
if (!sSystemServicesProxy.isSystemUser(processUser)) {
postToSystemUser(new Runnable() {
@Override
public void run() {
try {
mUserToSystemCallbacks.sendDockingTopTaskEvent(event.dragMode,
event.initialRect);
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
}
});
}
}
public final void onBusEvent(final RecentsActivityStartingEvent event) {
int processUser = sSystemServicesProxy.getProcessUser();
if (!sSystemServicesProxy.isSystemUser(processUser)) {
postToSystemUser(new Runnable() {
@Override
public void run() {
try {
mUserToSystemCallbacks.sendLaunchRecentsEvent();
} catch (RemoteException e) {
Log.e(TAG, "Callback failed", e);
}
}
});
}
}
public final void onBusEvent(ConfigurationChangedEvent event) {
// Update the configuration for the Recents component when the activity configuration
// changes as well
mImpl.onConfigurationChanged();
}
/**
* Attempts to register with the system user.
*/
private void registerWithSystemUser() {
final int processUser = sSystemServicesProxy.getProcessUser();
postToSystemUser(new Runnable() {
@Override
public void run() {
try {
mUserToSystemCallbacks.registerNonSystemUserCallbacks(
new RecentsImplProxy(mImpl), processUser);
} catch (RemoteException e) {
Log.e(TAG, "Failed to register", e);
}
}
});
}
/**
* Runs the runnable in the system user's Recents context, connecting to the service if
* necessary.
*/
private void postToSystemUser(final Runnable onConnectRunnable) {
mOnConnectRunnables.add(onConnectRunnable);
if (mUserToSystemCallbacks == null) {
Intent systemUserServiceIntent = new Intent();
systemUserServiceIntent.setClass(mContext, RecentsSystemUserService.class);
boolean bound = mContext.bindServiceAsUser(systemUserServiceIntent,
mUserToSystemServiceConnection, Context.BIND_AUTO_CREATE, UserHandle.SYSTEM);
EventLog.writeEvent(EventLogTags.SYSUI_RECENTS_CONNECTION,
EventLogConstants.SYSUI_RECENTS_CONNECTION_USER_BIND_SERVICE,
sSystemServicesProxy.getProcessUser());
if (!bound) {
// Retry after a fixed duration
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
registerWithSystemUser();
}
}, BIND_TO_SYSTEM_USER_RETRY_DELAY);
}
} else {
runAndFlushOnConnectRunnables();
}
}
/**
* Runs all the queued runnables after a service connection is made.
*/
private void runAndFlushOnConnectRunnables() {
for (Runnable r : mOnConnectRunnables) {
r.run();
}
mOnConnectRunnables.clear();
}
/**
* @return whether this device is provisioned and the current user is set up.
*/
private boolean isUserSetup() {
ContentResolver cr = mContext.getContentResolver();
return (Settings.Global.getInt(cr, Settings.Global.DEVICE_PROVISIONED, 0) != 0) &&
(Settings.Secure.getInt(cr, Settings.Secure.USER_SETUP_COMPLETE, 0) != 0);
}
/**
* Attempts to proxy the following action to the override recents package.
* @return whether the proxying was successful
*/
private boolean proxyToOverridePackage(String action) {
if (mOverrideRecentsPackageName != null) {
Intent intent = new Intent(action);
intent.setPackage(mOverrideRecentsPackageName);
intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
mContext.sendBroadcast(intent);
return true;
}
return false;
}
}