Dream when user activity times out while docked if appropriate.

If the user has requested that dreams start when docked and a user
activity timeout occurs, then start dreaming assuming all of the
other usual conditions are appropriate for dreaming (the device is
powered, etc.).

Previously dreams only started when the device was initial docked
but not if the device fell asleep while remaining docked.

Bug: 7281240
Change-Id: I72c3f854fd1ae8e6615f4fa6e4c4ecd8de37c84b

Author: Jeff Brown

services/java/com/android/server/power/PowerManagerService.java

@@ -107,6 +107,8 @@ public final class PowerManagerService extends IPowerManager.Stub
     private static final int DIRTY_PROXIMITY_POSITIVE = 1 << 9;
     // Dirty bit: screen on blocker state became held or unheld
     private static final int DIRTY_SCREEN_ON_BLOCKER_RELEASED = 1 << 10;
+    // Dirty bit: dock state changed
+    private static final int DIRTY_DOCK_STATE = 1 << 11;
 
     // Wakefulness: The device is asleep and can only be awoken by a call to wakeUp().
     // The screen should be off or in the process of being turned off by the display controller.
@@ -269,6 +271,9 @@ public final class PowerManagerService extends IPowerManager.Stub
     // draining faster than it is charging and the user activity timeout has expired.
     private int mBatteryLevelWhenDreamStarted;
 
+    // The current dock state.
+    private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
+
     // True if the device should wake up when plugged or unplugged.
     private boolean mWakeUpWhenPluggedOrUnpluggedConfig;
 
@@ -281,6 +286,9 @@ public final class PowerManagerService extends IPowerManager.Stub
     // True if dreams should be activated on sleep.
     private boolean mDreamsActivateOnSleepSetting;
 
+    // True if dreams should be activated on dock.
+    private boolean mDreamsActivateOnDockSetting;
+
     // The screen off timeout setting value in milliseconds.
     private int mScreenOffTimeoutSetting;
 
@@ -440,6 +448,10 @@ public void systemReady(TwilightService twilight, DreamManagerService dreamManag
             filter.addAction(Intent.ACTION_USER_SWITCHED);
             mContext.registerReceiver(new UserSwitchedReceiver(), filter, null, mHandler);
 
+            filter = new IntentFilter();
+            filter.addAction(Intent.ACTION_DOCK_EVENT);
+            mContext.registerReceiver(new DockReceiver(), filter, null, mHandler);
+
             // Register for settings changes.
             final ContentResolver resolver = mContext.getContentResolver();
             resolver.registerContentObserver(Settings.Secure.getUriFor(
@@ -448,6 +460,9 @@ public void systemReady(TwilightService twilight, DreamManagerService dreamManag
             resolver.registerContentObserver(Settings.Secure.getUriFor(
                     Settings.Secure.SCREENSAVER_ACTIVATE_ON_SLEEP),
                     false, mSettingsObserver, UserHandle.USER_ALL);
+            resolver.registerContentObserver(Settings.Secure.getUriFor(
+                    Settings.Secure.SCREENSAVER_ACTIVATE_ON_DOCK),
+                    false, mSettingsObserver, UserHandle.USER_ALL);
             resolver.registerContentObserver(Settings.System.getUriFor(
                     Settings.System.SCREEN_OFF_TIMEOUT),
                     false, mSettingsObserver, UserHandle.USER_ALL);
@@ -487,6 +502,9 @@ private void updateSettingsLocked() {
         mDreamsActivateOnSleepSetting = (Settings.Secure.getIntForUser(resolver,
                 Settings.Secure.SCREENSAVER_ACTIVATE_ON_SLEEP, 0,
                 UserHandle.USER_CURRENT) != 0);
+        mDreamsActivateOnDockSetting = (Settings.Secure.getIntForUser(resolver,
+                Settings.Secure.SCREENSAVER_ACTIVATE_ON_DOCK, 0,
+                UserHandle.USER_CURRENT) != 0);
         mScreenOffTimeoutSetting = Settings.System.getIntForUser(resolver,
                 Settings.System.SCREEN_OFF_TIMEOUT, DEFAULT_SCREEN_OFF_TIMEOUT,
                 UserHandle.USER_CURRENT);
@@ -1339,13 +1357,14 @@ private int getScreenDimDurationLocked(int screenOffTimeout) {
     private boolean updateWakefulnessLocked(int dirty) {
         boolean changed = false;
         if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_USER_ACTIVITY | DIRTY_BOOT_COMPLETED
-                | DIRTY_WAKEFULNESS | DIRTY_STAY_ON | DIRTY_PROXIMITY_POSITIVE)) != 0) {
+                | DIRTY_WAKEFULNESS | DIRTY_STAY_ON | DIRTY_PROXIMITY_POSITIVE
+                | DIRTY_DOCK_STATE)) != 0) {
             if (mWakefulness == WAKEFULNESS_AWAKE && isItBedTimeYetLocked()) {
                 if (DEBUG_SPEW) {
                     Slog.d(TAG, "updateWakefulnessLocked: Bed time...");
                 }
                 final long time = SystemClock.uptimeMillis();
-                if (mDreamsActivateOnSleepSetting) {
+                if (shouldNapAtBedTimeLocked()) {
                     changed = napNoUpdateLocked(time);
                 } else {
                     changed = goToSleepNoUpdateLocked(time,
@@ -1356,6 +1375,16 @@ private boolean updateWakefulnessLocked(int dirty) {
         return changed;
     }
 
+    /**
+     * Returns true if the device should automatically nap and start dreaming when the user
+     * activity timeout has expired and it's bedtime.
+     */
+    private boolean shouldNapAtBedTimeLocked() {
+        return mDreamsActivateOnSleepSetting
+                || (mDreamsActivateOnDockSetting
+                        && mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED);
+    }
+
     /**
      * Returns true if the device should go to sleep now.
      * Also used when exiting a dream to determine whether we should go back
@@ -2124,6 +2153,7 @@ protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
             pw.println("  mPlugType=" + mPlugType);
             pw.println("  mBatteryLevel=" + mBatteryLevel);
             pw.println("  mBatteryLevelWhenDreamStarted=" + mBatteryLevelWhenDreamStarted);
+            pw.println("  mDockState=" + mDockState);
             pw.println("  mStayOn=" + mStayOn);
             pw.println("  mProximityPositive=" + mProximityPositive);
             pw.println("  mBootCompleted=" + mBootCompleted);
@@ -2149,6 +2179,7 @@ protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
             pw.println("  mDreamsSupportedConfig=" + mDreamsSupportedConfig);
             pw.println("  mDreamsEnabledSetting=" + mDreamsEnabledSetting);
             pw.println("  mDreamsActivateOnSleepSetting=" + mDreamsActivateOnSleepSetting);
+            pw.println("  mDreamsActivateOnDockSetting=" + mDreamsActivateOnDockSetting);
             pw.println("  mScreenOffTimeoutSetting=" + mScreenOffTimeoutSetting);
             pw.println("  mMaximumScreenOffTimeoutFromDeviceAdmin="
                     + mMaximumScreenOffTimeoutFromDeviceAdmin + " (enforced="
@@ -2267,6 +2298,21 @@ public void onReceive(Context context, Intent intent) {
         }
     }
 
+    private final class DockReceiver extends BroadcastReceiver {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            synchronized (mLock) {
+                int dockState = intent.getIntExtra(Intent.EXTRA_DOCK_STATE,
+                        Intent.EXTRA_DOCK_STATE_UNDOCKED);
+                if (mDockState != dockState) {
+                    mDockState = dockState;
+                    mDirty |= DIRTY_DOCK_STATE;
+                    updatePowerStateLocked();
+                }
+            }
+        }
+    }
+
     private final class SettingsObserver extends ContentObserver {
         public SettingsObserver(Handler handler) {
             super(handler);