Merge "Remove overscroll on running task when it's not attached to RecentsView" into ub-launcher3-rvc-qpr-dev
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandlerV2.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandlerV2.java
index 929b11a..ed33532 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandlerV2.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandlerV2.java
@@ -488,6 +488,16 @@
             recentsAttachedToAppWindow = mIsShelfPeeking || mIsLikelyToStartNewTask;
         }
         mAnimationFactory.setRecentsAttachedToAppWindow(recentsAttachedToAppWindow, animate);
+
+        // Reapply window transform throughout the attach animation, as the animation affects how
+        // much the window is bound by overscroll (vs moving freely).
+        if (animate) {
+            ValueAnimator reapplyWindowTransformAnim = ValueAnimator.ofFloat(0, 1);
+            reapplyWindowTransformAnim.addUpdateListener(anim -> applyWindowTransform());
+            reapplyWindowTransformAnim.setDuration(RECENTS_ATTACH_DURATION).start();
+        } else {
+            applyWindowTransform();
+        }
     }
 
     @Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
index 6ebf8ad..217997d 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
@@ -2315,7 +2315,14 @@
         if (pageIndex == -1) {
             return 0;
         }
-        return getScrollForPage(pageIndex) - mOrientationHandler.getPrimaryScroll(this);
+        // Unbound the scroll (due to overscroll) if the adjacent tasks are offset away from it.
+        // This allows the page to move freely, given there's no visual indication why it shouldn't.
+        int boundedScroll = mOrientationHandler.getPrimaryScroll(this);
+        int unboundedScroll = getUnboundedScroll();
+        float unboundedProgress = mAdjacentPageOffset;
+        int scroll = Math.round(unboundedScroll * unboundedProgress
+                + boundedScroll * (1 - unboundedProgress));
+        return getScrollForPage(pageIndex) - scroll;
     }
 
     public Consumer<MotionEvent> getEventDispatcher(float navbarRotation) {