Do not allow panel expansion with bouncer over dream.

This change prevents the PanelViewController, the parent class of
NotificationPanelView, from expanding on end motion when the bouncer is
shown over dream. This prevents the panel from appearing erroneously on
motion cancel during swipe down on the bouncer. This cancel comes as a
result of the bouncer pilfering the touch events once the gesture has
been detected.

Fixed: 228347831
Test: atest BouncerSwipeTouchHandlerTest#testInformBouncerShowingOnExpand
Test: atest BouncerSwipeTouchHandlerTest#testInformBouncerShowingOnCollapse
Change-Id: Ia668954d31e26d704f9827b378a7ab0724a6ec4f

packages/SystemUI/src/com/android/systemui/dreams/touch/BouncerSwipeTouchHandler.java

@@ -142,6 +142,9 @@ public class BouncerSwipeTouchHandler implements DreamTouchHandler {
 
     private void setPanelExpansion(float expansion) {
         mCurrentExpansion = expansion;
+
+        mCentralSurfaces.setBouncerShowing(expansion != KeyguardBouncer.EXPANSION_HIDDEN);
+
         mStatusBarKeyguardViewManager.onPanelExpansionChanged(mCurrentExpansion, false, true);
     }
 

packages/SystemUI/src/com/android/systemui/statusbar/phone/CentralSurfaces.java

@@ -3468,9 +3468,7 @@ public class CentralSurfaces extends CoreStartable implements
         mStatusBarHideIconsForBouncerManager.setBouncerShowingAndTriggerUpdate(bouncerShowing);
         mCommandQueue.recomputeDisableFlags(mDisplayId, true /* animate */);
         updateScrimController();
-        if (!mBouncerShowing) {
-            updatePanelExpansionForKeyguard();
-        }
+        updateNotificationPanelTouchState();
     }
 
     /**
@@ -3614,10 +3612,13 @@ public class CentralSurfaces extends CoreStartable implements
      * collapse the panel after we expanded it, and thus we would end up with a blank
      * Keyguard.
      */
-    void updateNotificationPanelTouchState() {
+    public void updateNotificationPanelTouchState() {
         boolean goingToSleepWithoutAnimation = isGoingToSleep()
                 && !mDozeParameters.shouldControlScreenOff();
-        boolean disabled = (!mDeviceInteractive && !mDozeServiceHost.isPulsing())
+        boolean bouncerShowingOverDream = isBouncerShowing()
+                && mDreamOverlayStateController.isOverlayActive();
+        boolean disabled = bouncerShowingOverDream
+                || (!mDeviceInteractive && !mDozeServiceHost.isPulsing())
                 || goingToSleepWithoutAnimation;
         mNotificationPanelViewController.setTouchAndAnimationDisabled(disabled);
         mNotificationIconAreaController.setAnimationsEnabled(!disabled);

packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java

@@ -419,6 +419,8 @@ public abstract class PanelViewController {
                     expand = false;
                 } else if (onKeyguard) {
                     expand = true;
+                } else if (mCentralSurfaces.isBouncerShowingOverDream()) {
+                    expand = false;
                 } else if (mKeyguardStateController.isKeyguardFadingAway()) {
                     // If we're in the middle of dismissing the keyguard, don't expand due to the
                     // cancelled gesture. Gesture cancellation during an unlock is expected in some

packages/SystemUI/tests/src/com/android/systemui/dreams/touch/BouncerSwipeTouchHandlerTest.java

@@ -160,6 +160,28 @@ public class BouncerSwipeTouchHandlerTest extends SysuiTestCase {
                         2)).isTrue();
     }
 
+    /**
+     * Ensures {@link CentralSurfaces}
+     */
+    @Test
+    public void testInformBouncerShowingOnExpand() {
+        swipeToPosition(1f, Direction.UP, 0);
+        verify(mCentralSurfaces).setBouncerShowing(true);
+    }
+
+    /**
+     * Ensures {@link CentralSurfaces}
+     */
+    @Test
+    public void testInformBouncerHidingOnCollapse() {
+        // Must swipe up to set initial state.
+        swipeToPosition(1f, Direction.UP, 0);
+        Mockito.clearInvocations(mCentralSurfaces);
+
+        swipeToPosition(0f, Direction.DOWN, 0);
+        verify(mCentralSurfaces).setBouncerShowing(false);
+    }
+
     private enum Direction {
         DOWN,
         UP,
@@ -397,6 +419,7 @@ public class BouncerSwipeTouchHandlerTest extends SysuiTestCase {
     }
 
     private void swipeToPosition(float percent, Direction direction, float velocityY) {
+        Mockito.clearInvocations(mTouchSession);
         mTouchHandler.onSessionStart(mTouchSession);
         ArgumentCaptor<GestureDetector.OnGestureListener> gestureListenerCaptor =
                 ArgumentCaptor.forClass(GestureDetector.OnGestureListener.class);