Set system gesture exclusion rects for Bubbles

When collapsed (stack of bubbles) or animating between
collapsed or expanded states, the view bounds of the
bubble stack are set as the system gesture exclusion
zone.

Test: manually w/fully gesture nav enabled
Bug: 126360272
Change-Id: I8b517cd2bebf86be0fff7d676f304845907689a5

packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java

@@ -64,6 +64,8 @@ import com.android.systemui.statusbar.notification.collection.NotificationEntry;
 
 import java.math.BigDecimal;
 import java.math.RoundingMode;
+import java.util.Collections;
+import java.util.List;
 
 /**
  * Renders bubbles in a stack and handles animating expanded and collapsed states.
@@ -164,6 +166,8 @@ public class BubbleStackView extends FrameLayout {
     int[] mTempLoc = new int[2];
     RectF mTempRect = new RectF();
 
+    private final List<Rect> mSystemGestureExclusionRects = Collections.singletonList(new Rect());
+
     private ViewTreeObserver.OnPreDrawListener mViewUpdater =
             new ViewTreeObserver.OnPreDrawListener() {
                 @Override
@@ -175,6 +179,9 @@ public class BubbleStackView extends FrameLayout {
                 }
             };
 
+    private ViewTreeObserver.OnDrawListener mSystemGestureExcludeUpdater =
+            this::updateSystemGestureExcludeRects;
+
     private ViewClippingUtil.ClippingParameters mClippingParameters =
             new ViewClippingUtil.ClippingParameters() {
 
@@ -361,6 +368,19 @@ public class BubbleStackView extends FrameLayout {
         return false;
     }
 
+    private void updateSystemGestureExcludeRects() {
+        // Exclude the region occupied by the first BubbleView in the stack
+        Rect excludeZone = mSystemGestureExclusionRects.get(0);
+        if (mBubbleContainer.getChildCount() > 0) {
+            View firstBubble = mBubbleContainer.getChildAt(0);
+            excludeZone.set(firstBubble.getLeft(), firstBubble.getTop(), firstBubble.getRight(),
+                    firstBubble.getBottom());
+        } else {
+            excludeZone.setEmpty();
+        }
+        mBubbleContainer.setSystemGestureExclusionRects(mSystemGestureExclusionRects);
+    }
+
     /**
      * Updates the visibility of the 'dot' indicating an update on the bubble.
      * @param key the {@link NotificationEntry#key} associated with the bubble.
@@ -669,12 +689,17 @@ public class BubbleStackView extends FrameLayout {
             updateExpandedBubble();
             applyCurrentState();
 
+            // This must be a separate OnDrawListener since it should be called for every draw.
+            getViewTreeObserver().addOnDrawListener(mSystemGestureExcludeUpdater);
+
             mIsExpansionAnimating = true;
 
             Runnable updateAfter = () -> {
                 applyCurrentState();
                 mIsExpansionAnimating = false;
                 requestUpdate();
+                getViewTreeObserver().removeOnDrawListener(mSystemGestureExcludeUpdater);
+                updateSystemGestureExcludeRects();
             };
 
             if (shouldExpand) {