Cleaned up the clipping logic for the dismiss motion.

Notifications are now not clipped anymore during the animation
and it is ensured that the State is always correctly reset after
the animation.

Bug: 22232352
Change-Id: Ic873a0b119d5f71c29f5fd9b76a7bee1ae74638b

3 files changed, 46 insertions, 5 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
index 4a7ea96..3a97be6 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
@@ -43,6 +43,7 @@ public class AmbientState {
     private int mTopPadding;
     private boolean mShadeExpanded;
     private float mMaxHeadsUpTranslation;
+    private boolean mDismissAllInProgress;
 
     public int getScrollY() {
         return mScrollY;
@@ -183,4 +184,12 @@ public class AmbientState {
         HeadsUpManager.HeadsUpEntry topEntry = mHeadsUpManager.getTopEntry();
         return topEntry == null ? null : topEntry.entry.row;
     }
+
+    public void setDismissAllInProgress(boolean dismissAllInProgress) {
+        mDismissAllInProgress = dismissAllInProgress;
+    }
+
+    public boolean isDismissAllInProgress() {
+        return mDismissAllInProgress;
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
index bde07de..0d89b21 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
@@ -773,8 +773,7 @@ public class NotificationStackScrollLayout extends ViewGroup
     }
 
     public boolean canChildBeDismissed(View v) {
-        final View veto = v.findViewById(R.id.veto);
-        return (veto != null && veto.getVisibility() != View.GONE);
+        return StackScrollAlgorithm.canChildBeDismissed(v);
     }
 
     @Override
@@ -2610,9 +2609,28 @@ public class NotificationStackScrollLayout extends ViewGroup
     public void setDismissAllInProgress(boolean dismissAllInProgress) {
         mDismissAllInProgress = dismissAllInProgress;
         mDismissView.setDismissAllInProgress(dismissAllInProgress);
+        mAmbientState.setDismissAllInProgress(dismissAllInProgress);
         if (dismissAllInProgress) {
             disableClipOptimization();
         }
+        handleDismissAllClipping();
+    }
+
+    private void handleDismissAllClipping() {
+        final int count = getChildCount();
+        boolean previousChildWillBeDismissed = false;
+        for (int i = 0; i < count; i++) {
+            ExpandableView child = (ExpandableView) getChildAt(i);
+            if (child.getVisibility() == GONE) {
+                continue;
+            }
+            if (mDismissAllInProgress && previousChildWillBeDismissed) {
+                child.setMinClipTopAmount(child.getClipTopAmount());
+            } else {
+                child.setMinClipTopAmount(0);
+            }
+            previousChildWillBeDismissed = canChildBeDismissed(child);
+        }
     }
 
     private void disableClipOptimization() {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
index 5c604b6..5d2e5b7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
@@ -202,6 +202,7 @@ public class StackScrollAlgorithm {
 
     private void updateClipping(StackScrollState resultState,
             StackScrollAlgorithmState algorithmState, AmbientState ambientState) {
+        boolean dismissAllInProgress = ambientState.isDismissAllInProgress();
         float previousNotificationEnd = 0;
         float previousNotificationStart = 0;
         boolean previousNotificationIsSwiped = false;
@@ -237,16 +238,29 @@ public class StackScrollAlgorithm {
             updateChildClippingAndBackground(state, newHeight, clipHeight,
                     newHeight - (previousNotificationStart - newYTranslation));
 
+            if (dismissAllInProgress) {
+                state.clipTopAmount = Math.max(child.getMinClipTopAmount(), state.clipTopAmount);
+            }
+
             if (!child.isTransparent()) {
                 // Only update the previous values if we are not transparent,
                 // otherwise we would clip to a transparent view.
-                previousNotificationStart = newYTranslation + state.clipTopAmount * state.scale;
-                previousNotificationEnd = newNotificationEnd;
-                previousNotificationIsSwiped = ambientState.getDraggedViews().contains(child);
+                if ((dismissAllInProgress && canChildBeDismissed(child))) {
+                    previousNotificationIsSwiped = true;
+                } else {
+                    previousNotificationIsSwiped = ambientState.getDraggedViews().contains(child);
+                    previousNotificationEnd = newNotificationEnd;
+                    previousNotificationStart = newYTranslation + state.clipTopAmount * state.scale;
+                }
             }
         }
     }
 
+    public static boolean canChildBeDismissed(View v) {
+        final View veto = v.findViewById(R.id.veto);
+        return (veto != null && veto.getVisibility() != View.GONE);
+    }
+
     /**
      * Updates the shadow outline and the clipping for a view.
      *