Merge "Move DimLayer to Root if translucent window and not multi-window" into rvc-dev am: 2d8d9812e9 am: 7aad5fc364

Change-Id: I50befa620229ac844789bdaa3664ed149aecf960

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

@@ -253,6 +253,12 @@ public class DisplayArea<T extends WindowContainer> extends WindowContainer<T> {
             super.prepareSurfaces();
             getBounds(mTmpDimBoundsRect);
 
+            // If SystemUI is dragging for recents, we want to reset the dim state so any dim layer
+            // on the display level fades out.
+            if (forAllTasks(task -> !task.canAffectSystemUiFlags())) {
+                mDimmer.resetDimStates();
+            }
+
             if (mDimmer.updateDims(getPendingTransaction(), mTmpDimBoundsRect)) {
                 scheduleAnimation();
             }

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

@@ -3348,6 +3348,21 @@ class Task extends WindowContainer<WindowContainer> {
 
     @Override
     Dimmer getDimmer() {
+        // If the window is in multi-window mode, we want to dim at the Task level to ensure the dim
+        // bounds match the area the app lives in
+        if (inMultiWindowMode()) {
+            return mDimmer;
+        }
+
+        // If we're not at the root task level, we want to keep traversing through the parents to
+        // find the root.
+        // Once at the root task level, we want to check {@link #isTranslucent(ActivityRecord)}.
+        // If true, we want to get the Dimmer from the level above since we don't want to animate
+        // the dim with the Task.
+        if (!isRootTask() || isTranslucent(null)) {
+            return super.getDimmer();
+        }
+
         return mDimmer;
     }