Merge "Destroy saved surfaces if one of the last visible windows gets removed" into nyc-dev

am: 15818e1156

* commit '15818e1156101f1d3a01009e7bc223d8ae88546d':
  Destroy saved surfaces if one of the last visible windows gets removed

Change-Id: I143743940263578e7111ae41eb7b88c005be18a6

services/core/java/com/android/server/wm/AppWindowToken.java

@@ -451,6 +451,16 @@ class AppWindowToken extends WindowToken {
         destroySurfaces();
     }
 
+    void markSavedSurfaceExiting() {
+        for (int i = allAppWindows.size() - 1; i >= 0; i--) {
+            final WindowState w = allAppWindows.get(i);
+            if (w.isAnimatingInvisibleWithSavedSurface()) {
+                w.mAnimatingExit = true;
+                w.mWinAnimator.mAnimating = true;
+            }
+        }
+    }
+
     void restoreSavedSurfaces() {
         if (!canRestoreSurfaces()) {
             clearVisibleBeforeClientHidden();

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -2277,6 +2277,19 @@ public class WindowManagerService extends IWindowManager.Stub
         }
     }
 
+    private void setupWindowForRemoveOnExit(WindowState win) {
+        win.mRemoveOnExit = true;
+        win.setDisplayLayoutNeeded();
+        // Request a focus update as this window's input channel is already gone. Otherwise
+        // we could have no focused window in input manager.
+        final boolean focusChanged = updateFocusedWindowLocked(
+                UPDATE_FOCUS_WILL_PLACE_SURFACES, false /*updateInputWindows*/);
+        mWindowPlacerLocked.performSurfacePlacement();
+        if (focusChanged) {
+            mInputMonitor.updateInputWindowsLw(false /*force*/);
+        }
+    }
+
     public void removeWindow(Session session, IWindow client) {
         synchronized(mWindowMap) {
             WindowState win = windowForClientLocked(session, client, false);
@@ -2358,14 +2371,7 @@ public class WindowManagerService extends IWindowManager.Stub
                 // Do not set mAnimatingExit to true here, it will cause the surface to be hidden
                 // immediately after the enter animation is done. If the app is not yet drawn then
                 // it will show up as a flicker.
-                win.mRemoveOnExit = true;
-                // Request a focus update as this window's input channel is already gone. Otherwise
-                // we could have no focused window in input manager.
-                final boolean focusChanged = updateFocusedWindowLocked(
-                        UPDATE_FOCUS_WILL_PLACE_SURFACES, false /*updateInputWindows*/);
-                if (focusChanged) {
-                    mInputMonitor.updateInputWindowsLw(false /*force*/);
-                }
+                setupWindowForRemoveOnExit(win);
                 Binder.restoreCallingIdentity(origId);
                 return;
             }
@@ -2417,17 +2423,10 @@ public class WindowManagerService extends IWindowManager.Stub
                 // The exit animation is running or should run... wait for it!
                 if (DEBUG_ADD_REMOVE) Slog.v(TAG_WM,
                         "Not removing " + win + " due to exit animation ");
-                win.mRemoveOnExit = true;
-                win.setDisplayLayoutNeeded();
-                final boolean focusChanged = updateFocusedWindowLocked(
-                        UPDATE_FOCUS_WILL_PLACE_SURFACES, false /*updateInputWindows*/);
-                mWindowPlacerLocked.performSurfacePlacement();
+                setupWindowForRemoveOnExit(win);
                 if (appToken != null) {
                     appToken.updateReportedVisibilityLocked();
                 }
-                if (focusChanged) {
-                    mInputMonitor.updateInputWindowsLw(false /*force*/);
-                }
                 Binder.restoreCallingIdentity(origId);
                 return;
             }

services/core/java/com/android/server/wm/WindowState.java

@@ -2111,7 +2111,9 @@ final class WindowState implements WindowManagerPolicy.WindowState {
     void clearHasSavedSurface() {
         mSurfaceSaved = false;
         mAnimatingWithSavedSurface = false;
-        mWasVisibleBeforeClientHidden = false;
+        if (mWasVisibleBeforeClientHidden) {
+            mAppToken.destroySavedSurfaces();
+        }
     }
 
     boolean clearAnimatingWithSavedSurface() {

services/core/java/com/android/server/wm/WindowSurfacePlacer.java

@@ -1301,6 +1301,14 @@ class WindowSurfacePlacer {
         appsCount = mService.mClosingApps.size();
         for (int i = 0; i < appsCount; i++) {
             AppWindowToken wtoken = mService.mClosingApps.valueAt(i);
+
+            // If we still have some windows animating with saved surfaces that's
+            // either invisible or already removed, mark them exiting so that they
+            // are disposed of after the exit animation. These are not supposed to
+            // be shown, or are delayed removal until app is actually drawn (in which
+            // case the window will be removed after the animation).
+            wtoken.markSavedSurfaceExiting();
+
             final AppWindowAnimator appAnimator = wtoken.mAppAnimator;
             if (DEBUG_APP_TRANSITIONS) Slog.v(TAG, "Now closing app " + wtoken);
             appAnimator.clearThumbnail();