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/*
* 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;
}
}
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