Fix issue #4603422: Compatibility mode button doesn't always update

We now tell the system bar every time the top activity has changed for
it to re-evaluate its UI state.

Also fix issue #: 4607102 Low rider notifications.  It turns out this
was due to the change in the dialog asset; the notification UI was relying
on this having a lot of padding to make it sit above the status bar.
Now we have an explicitly mechanism to set how much it overlaps (or doesn't)
the status bar.

Change-Id: Iab5ebd86e620ff4fc4cd77206e18af962ec2830e
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 88cd43c..ff979a0 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -30,6 +30,8 @@
     <dimen name="status_bar_recents_thumbnail_max_height">64dp</dimen>
     <!-- Width of scrollable area in recents -->
     <dimen name="status_bar_recents_width">356dp</dimen>
+    <!-- Amount to offset bottom of notification peek window from top of status bar. -->
+    <dimen name="peek_window_y_offset">-12dp</dimen>
 
 </resources>
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java b/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
index d55a7c2..07f9ad8 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
@@ -54,7 +54,7 @@
 
     private static final int MSG_SET_LIGHTS_ON = 0x00070000;
 
-    private static final int MSG_SHOW_MENU = 0x00080000;
+    private static final int MSG_TOP_APP_WINDOW_CHANGED = 0x00080000;
     private static final int MSG_SHOW_IME_BUTTON = 0x00090000;
     private static final int MSG_SET_HARD_KEYBOARD_STATUS = 0x000a0000;
 
@@ -82,7 +82,7 @@
         public void animateExpand();
         public void animateCollapse();
         public void setLightsOn(boolean on);
-        public void setMenuKeyVisible(boolean visible);
+        public void topAppWindowChanged(boolean visible);
         public void setImeWindowStatus(IBinder token, int vis, int backDisposition);
         public void setHardKeyboardStatus(boolean available, boolean enabled);
     }
@@ -160,10 +160,11 @@
         }
     }
 
-    public void setMenuKeyVisible(boolean visible) {
+    public void topAppWindowChanged(boolean menuVisible) {
         synchronized (mList) {
-            mHandler.removeMessages(MSG_SHOW_MENU);
-            mHandler.obtainMessage(MSG_SHOW_MENU, visible ? 1 : 0, 0, null).sendToTarget();
+            mHandler.removeMessages(MSG_TOP_APP_WINDOW_CHANGED);
+            mHandler.obtainMessage(MSG_TOP_APP_WINDOW_CHANGED, menuVisible ? 1 : 0, 0,
+                    null).sendToTarget();
         }
     }
 
@@ -240,8 +241,8 @@
                 case MSG_SET_LIGHTS_ON:
                     mCallbacks.setLightsOn(msg.arg1 != 0);
                     break;
-                case MSG_SHOW_MENU:
-                    mCallbacks.setMenuKeyVisible(msg.arg1 != 0);
+                case MSG_TOP_APP_WINDOW_CHANGED:
+                    mCallbacks.topAppWindowChanged(msg.arg1 != 0);
                     break;
                 case MSG_SHOW_IME_BUTTON:
                     mCallbacks.setImeWindowStatus((IBinder)msg.obj, msg.arg1, msg.arg2);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/StatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/StatusBar.java
index 23ae823..e567dc7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/StatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/StatusBar.java
@@ -78,7 +78,7 @@
 
         disable(switches[0]);
         setLightsOn(switches[1] != 0);
-        setMenuKeyVisible(switches[2] != 0);
+        topAppWindowChanged(switches[2] != 0);
         // StatusBarManagerService has a back up of IME token and it's restored here.
         setImeWindowStatus(binders.get(0), switches[3], switches[4]);
         setHardKeyboardStatus(switches[5] != 0, switches[6] != 0);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 1e46246..84ae766 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -1019,7 +1019,7 @@
     }
 
     // Not supported
-    public void setMenuKeyVisible(boolean visible) { }
+    public void topAppWindowChanged(boolean visible) { }
     public void setImeWindowStatus(IBinder token, int vis, int backDisposition) { }
     @Override
     public void setHardKeyboardStatus(boolean available, boolean enabled) { }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
index 4e10770..b304ebc 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
@@ -245,11 +245,12 @@
                 512, // ViewGroup.LayoutParams.WRAP_CONTENT,
                 ViewGroup.LayoutParams.WRAP_CONTENT,
                 WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL,
-                WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
+                WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
                     | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM
                     | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,
                 PixelFormat.TRANSLUCENT);
         lp.gravity = Gravity.BOTTOM | Gravity.RIGHT;
+        lp.y = res.getDimensionPixelOffset(R.dimen.peek_window_y_offset);
         lp.setTitle("NotificationPeekWindow");
         lp.windowAnimations = com.android.internal.R.style.Animation_Toast;
 
@@ -955,14 +956,14 @@
         mHandler.sendEmptyMessage(on ? MSG_SHOW_CHROME : MSG_HIDE_CHROME);
     }
 
-    public void setMenuKeyVisible(boolean visible) {
+    public void topAppWindowChanged(boolean windowVisible) {
         if (DEBUG) {
-            Slog.d(TAG, (visible?"showing":"hiding") + " the MENU button");
+            Slog.d(TAG, (windowVisible?"showing":"hiding") + " the MENU button");
         }
-        mMenuButton.setVisibility(visible ? View.VISIBLE : View.GONE);
+        mMenuButton.setVisibility(windowVisible ? View.VISIBLE : View.GONE);
 
         // See above re: lights-out policy for legacy apps.
-        if (visible) setLightsOn(true);
+        if (windowVisible) setLightsOn(true);
 
         // XXX: HACK: not sure if this is the best way to catch a new activity that might require a
         // change in compatibility features, but it's a start.