Handle KEYCODE_SOFT_SLEEP from Ungaze.

Needed for Ungaze to trigger "soft sleep" (respecting wake locks); operates by
sending new KEYCODE_SOFT_SLEEP to PhoneWindowManager, which calls
PowerManagerService's new method setUserInactiveOverride (thereby
causing immediate sleep, modulo wakelocks, upon next iteration of
PowerManagerService's main loop).

BUG: b/23589870
Change-Id: I24a96bd6db8ff28674c907f2898e49c4f6140209
diff --git a/api/current.txt b/api/current.txt
index d7fdb2d..1946e49 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -35217,6 +35217,7 @@
     field public static final int KEYCODE_SLEEP = 223; // 0xdf
     field public static final int KEYCODE_SOFT_LEFT = 1; // 0x1
     field public static final int KEYCODE_SOFT_RIGHT = 2; // 0x2
+    field public static final int KEYCODE_SOFT_SLEEP = 276; // 0x114
     field public static final int KEYCODE_SPACE = 62; // 0x3e
     field public static final int KEYCODE_STAR = 17; // 0x11
     field public static final int KEYCODE_STB_INPUT = 180; // 0xb4
diff --git a/api/system-current.txt b/api/system-current.txt
index f464292..b2a1539 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -37520,6 +37520,7 @@
     field public static final int KEYCODE_SLEEP = 223; // 0xdf
     field public static final int KEYCODE_SOFT_LEFT = 1; // 0x1
     field public static final int KEYCODE_SOFT_RIGHT = 2; // 0x2
+    field public static final int KEYCODE_SOFT_SLEEP = 276; // 0x114
     field public static final int KEYCODE_SPACE = 62; // 0x3e
     field public static final int KEYCODE_STAR = 17; // 0x11
     field public static final int KEYCODE_STB_INPUT = 180; // 0xb4
diff --git a/core/java/android/os/PowerManagerInternal.java b/core/java/android/os/PowerManagerInternal.java
index e742f98..70cff00 100644
--- a/core/java/android/os/PowerManagerInternal.java
+++ b/core/java/android/os/PowerManagerInternal.java
@@ -108,6 +108,12 @@
     public abstract void setUserActivityTimeoutOverrideFromWindowManager(long timeoutMillis);
 
     /**
+     * Used by the window manager to tell the power manager that the user is no longer actively
+     * using the device.
+     */
+    public abstract void setUserInactiveOverrideFromWindowManager();
+
+    /**
      * Used by device administration to set the maximum screen off timeout.
      *
      * This method must only be called by the device administration policy manager.
diff --git a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java
index 52852e7..2bd319c 100644
--- a/core/java/android/view/KeyEvent.java
+++ b/core/java/android/view/KeyEvent.java
@@ -784,8 +784,10 @@
     /** Key code constant: Step backward media key.
      * Steps media backward, one frame at a time. */
     public static final int KEYCODE_MEDIA_STEP_BACKWARD = 275;
+    /** Key code constant: put device to sleep unless a wakelock is held. */
+    public static final int KEYCODE_SOFT_SLEEP = 276;
 
-    private static final int LAST_KEYCODE = KEYCODE_MEDIA_STEP_BACKWARD;
+    private static final int LAST_KEYCODE = KEYCODE_SOFT_SLEEP;
 
     // NOTE: If you add a new keycode here you must also add it to:
     //  isSystem()
diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml
index a024656..cf83422 100644
--- a/core/res/res/values/attrs.xml
+++ b/core/res/res/values/attrs.xml
@@ -1814,6 +1814,7 @@
         <enum name="KEYCODE_MEDIA_SKIP_BACKWARD" value="273" />
         <enum name="KEYCODE_MEDIA_STEP_FORWARD" value="274" />
         <enum name="KEYCODE_MEDIA_STEP_BACKWARD" value="275" />
+        <enum name="KEYCODE_SOFT_SLEEP" value="276" />
     </attr>
 
     <!-- ***************************************************************** -->
diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 34737c1..c7c5afd 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -65,6 +65,7 @@
 import android.os.Message;
 import android.os.Messenger;
 import android.os.PowerManager;
+import android.os.PowerManagerInternal;
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceManager;
@@ -265,6 +266,7 @@
     WindowManagerFuncs mWindowManagerFuncs;
     WindowManagerInternal mWindowManagerInternal;
     PowerManager mPowerManager;
+    PowerManagerInternal mPowerManagerInternal;
     ActivityManagerInternal mActivityManagerInternal;
     DreamManagerInternal mDreamManagerInternal;
     IStatusBarService mStatusBarService;
@@ -1324,6 +1326,7 @@
         mActivityManagerInternal = LocalServices.getService(ActivityManagerInternal.class);
         mDreamManagerInternal = LocalServices.getService(DreamManagerInternal.class);
         mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
+        mPowerManagerInternal = LocalServices.getService(PowerManagerInternal.class);
 
         // Init display burn-in protection
         boolean burnInProtectionEnabled = context.getResources().getBoolean(
@@ -5080,6 +5083,15 @@
                 break;
             }
 
+            case KeyEvent.KEYCODE_SOFT_SLEEP: {
+                result &= ~ACTION_PASS_TO_USER;
+                isWakeKey = false;
+                if (!down) {
+                    mPowerManagerInternal.setUserInactiveOverrideFromWindowManager();
+                }
+                break;
+            }
+
             case KeyEvent.KEYCODE_WAKEUP: {
                 result &= ~ACTION_PASS_TO_USER;
                 isWakeKey = true;
diff --git a/services/core/java/com/android/server/power/PowerManagerService.java b/services/core/java/com/android/server/power/PowerManagerService.java
index b920f97..a06ea1f 100644
--- a/services/core/java/com/android/server/power/PowerManagerService.java
+++ b/services/core/java/com/android/server/power/PowerManagerService.java
@@ -393,6 +393,10 @@
     // Use -1 to disable.
     private int mScreenBrightnessOverrideFromWindowManager = -1;
 
+    // The window manager has determined the user to be inactive via other means.
+    // Set this to false to disable.
+    private boolean mUserInactiveOverrideFromWindowManager;
+
     // The user activity timeout override from the window manager
     // to allow the current foreground activity to override the user activity timeout.
     // Use -1 to disable.
@@ -1028,6 +1032,10 @@
 
             mNotifier.onUserActivity(event, uid);
 
+            if (mUserInactiveOverrideFromWindowManager) {
+                mUserInactiveOverrideFromWindowManager = false;
+            }
+
             if (mWakefulness == WAKEFULNESS_ASLEEP
                     || mWakefulness == WAKEFULNESS_DOZING
                     || (flags & PowerManager.USER_ACTIVITY_FLAG_INDIRECT) != 0) {
@@ -1525,6 +1533,7 @@
                 final int sleepTimeout = getSleepTimeoutLocked();
                 final int screenOffTimeout = getScreenOffTimeoutLocked(sleepTimeout);
                 final int screenDimDuration = getScreenDimDurationLocked(screenOffTimeout);
+                final boolean userInactiveOverride = mUserInactiveOverrideFromWindowManager;
 
                 mUserActivitySummary = 0;
                 if (mLastUserActivityTime >= mLastWakeTime) {
@@ -1550,6 +1559,7 @@
                         }
                     }
                 }
+
                 if (mUserActivitySummary == 0) {
                     if (sleepTimeout >= 0) {
                         final long anyUserActivity = Math.max(mLastUserActivityTime,
@@ -1565,6 +1575,12 @@
                         nextTimeout = -1;
                     }
                 }
+
+                if (mUserActivitySummary != USER_ACTIVITY_SCREEN_DREAM && userInactiveOverride) {
+                    mUserActivitySummary = USER_ACTIVITY_SCREEN_DREAM;
+                    nextTimeout = -1;
+                }
+
                 if (mUserActivitySummary != 0 && nextTimeout >= 0) {
                     Message msg = mHandler.obtainMessage(MSG_USER_ACTIVITY_TIMEOUT);
                     msg.setAsynchronous(true);
@@ -2494,6 +2510,14 @@
         }
     }
 
+    private void setUserInactiveOverrideFromWindowManagerInternal() {
+        synchronized (mLock) {
+            mUserInactiveOverrideFromWindowManager = true;
+            mDirty |= DIRTY_USER_ACTIVITY;
+            updatePowerStateLocked();
+        }
+    }
+
     private void setUserActivityTimeoutOverrideFromWindowManagerInternal(long timeoutMillis) {
         synchronized (mLock) {
             if (mUserActivityTimeoutOverrideFromWindowManager != timeoutMillis) {
@@ -2683,6 +2707,8 @@
                     + mScreenBrightnessOverrideFromWindowManager);
             pw.println("  mUserActivityTimeoutOverrideFromWindowManager="
                     + mUserActivityTimeoutOverrideFromWindowManager);
+            pw.println("  mUserInactiveOverrideFromWindowManager="
+                    + mUserInactiveOverrideFromWindowManager);
             pw.println("  mTemporaryScreenBrightnessSettingOverride="
                     + mTemporaryScreenBrightnessSettingOverride);
             pw.println("  mTemporaryScreenAutoBrightnessAdjustmentSettingOverride="
@@ -3487,6 +3513,11 @@
         }
 
         @Override
+        public void setUserInactiveOverrideFromWindowManager() {
+            setUserInactiveOverrideFromWindowManagerInternal();
+        }
+
+        @Override
         public void setUserActivityTimeoutOverrideFromWindowManager(long timeoutMillis) {
             setUserActivityTimeoutOverrideFromWindowManagerInternal(timeoutMillis);
         }