| /* |
| * Copyright (C) 2012 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.service.dreams; |
| |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.PowerManager; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.util.Slog; |
| |
| /** |
| * Internal helper for launching dreams to ensure consistency between the |
| * <code>UiModeManagerService</code> system service and the <code>Somnambulator</code> activity. |
| * |
| * @hide |
| */ |
| public final class Sandman { |
| private static final String TAG = "Sandman"; |
| |
| // The component name of a special dock app that merely launches a dream. |
| // We don't want to launch this app when docked because it causes an unnecessary |
| // activity transition. We just want to start the dream. |
| private static final ComponentName SOMNAMBULATOR_COMPONENT = |
| new ComponentName("com.android.systemui", "com.android.systemui.Somnambulator"); |
| |
| |
| // The sandman is eternal. No one instantiates him. |
| private Sandman() { |
| } |
| |
| /** |
| * Returns true if the specified dock app intent should be started. |
| * False if we should dream instead, if appropriate. |
| */ |
| public static boolean shouldStartDockApp(Context context, Intent intent) { |
| ComponentName name = intent.resolveActivity(context.getPackageManager()); |
| return name != null && !name.equals(SOMNAMBULATOR_COMPONENT); |
| } |
| |
| /** |
| * Starts a dream manually. |
| */ |
| public static void startDreamByUserRequest(Context context) { |
| startDream(context, false); |
| } |
| |
| /** |
| * Starts a dream when docked if the system has been configured to do so, |
| * otherwise does nothing. |
| */ |
| public static void startDreamWhenDockedIfAppropriate(Context context) { |
| if (!isScreenSaverEnabled(context) |
| || !isScreenSaverActivatedOnDock(context)) { |
| Slog.i(TAG, "Dreams currently disabled for docks."); |
| return; |
| } |
| |
| startDream(context, true); |
| } |
| |
| private static void startDream(Context context, boolean docked) { |
| try { |
| IDreamManager dreamManagerService = IDreamManager.Stub.asInterface( |
| ServiceManager.getService(DreamService.DREAM_SERVICE)); |
| if (dreamManagerService != null && !dreamManagerService.isDreaming()) { |
| if (docked) { |
| Slog.i(TAG, "Activating dream while docked."); |
| |
| // Wake up. |
| // The power manager will wake up the system automatically when it starts |
| // receiving power from a dock but there is a race between that happening |
| // and the UI mode manager starting a dream. We want the system to already |
| // be awake by the time this happens. Otherwise the dream may not start. |
| PowerManager powerManager = |
| (PowerManager)context.getSystemService(Context.POWER_SERVICE); |
| powerManager.wakeUp(SystemClock.uptimeMillis(), |
| "android.service.dreams:DREAM"); |
| } else { |
| Slog.i(TAG, "Activating dream by user request."); |
| } |
| |
| // Dream. |
| dreamManagerService.dream(); |
| } |
| } catch (RemoteException ex) { |
| Slog.e(TAG, "Could not start dream when docked.", ex); |
| } |
| } |
| |
| private static boolean isScreenSaverEnabled(Context context) { |
| int def = context.getResources().getBoolean( |
| com.android.internal.R.bool.config_dreamsEnabledByDefault) ? 1 : 0; |
| return Settings.Secure.getIntForUser(context.getContentResolver(), |
| Settings.Secure.SCREENSAVER_ENABLED, def, |
| UserHandle.USER_CURRENT) != 0; |
| } |
| |
| private static boolean isScreenSaverActivatedOnDock(Context context) { |
| int def = context.getResources().getBoolean( |
| com.android.internal.R.bool.config_dreamsActivatedOnDockByDefault) ? 1 : 0; |
| return Settings.Secure.getIntForUser(context.getContentResolver(), |
| Settings.Secure.SCREENSAVER_ACTIVATE_ON_DOCK, def, |
| UserHandle.USER_CURRENT) != 0; |
| } |
| } |