From 5f6b07d31c6994595248c1d12c630f1a3650c9a2 Mon Sep 17 00:00:00 2001
From: Schneider Victor-tulias <victortulias@google.com>
Date: Mon, 11 Jul 2022 07:12:13 -0700
Subject: [PATCH] Pause the AllSetActivity background animation more reliably.

- Pause the animation when the alpha <= 0.1f, rather than 0f
- Pause the animation when the AllSetActivity pauses
- Do not vibrate if the AllSetActivity is not resumed

Bug: 236924895
Test: manually launched AllSetActivity and swiped up at various speeds
Change-Id: I1019f680730cfc72e9ad305d7ae09cff8a1637be
---
 .../quickstep/interaction/AllSetActivity.java | 34 ++++++++++++++-----
 1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java b/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java
index aa527890f9..8ad17cb711 100644
--- a/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java
+++ b/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java
@@ -83,6 +83,8 @@ public class AllSetActivity extends Activity {
 
     private static final int MAX_SWIPE_DURATION = 350;
 
+    private static final float ANIMATION_PAUSE_ALPHA_THRESHOLD = 0.1f;
+
     private TISBindHelper mTISBindHelper;
     private TISBinder mBinder;
 
@@ -145,6 +147,10 @@ public class AllSetActivity extends Activity {
     }
 
     private void runOnUiHelperThread(Runnable runnable) {
+        if (!isResumed()
+                || getContentViewAlphaForSwipeProgress() <= ANIMATION_PAUSE_ALPHA_THRESHOLD) {
+            return;
+        }
         Executors.UI_HELPER_EXECUTOR.execute(runnable);
     }
 
@@ -198,6 +204,7 @@ public class AllSetActivity extends Activity {
     @Override
     protected void onResume() {
         super.onResume();
+        maybeResumeOrPauseBackgroundAnimation();
         if (mBinder != null) {
             mBinder.getTaskbarManager().setSetupUIVisible(true);
             mBinder.setSwipeUpProxy(this::createSwipeUpProxy);
@@ -216,6 +223,7 @@ public class AllSetActivity extends Activity {
     protected void onPause() {
         super.onPause();
         clearBinderOverride();
+        maybeResumeOrPauseBackgroundAnimation();
         if (mSwipeProgress.value >= 1) {
             finishAndRemoveTask();
         }
@@ -250,10 +258,25 @@ public class AllSetActivity extends Activity {
         return mSwipeProgress;
     }
 
+    private float getContentViewAlphaForSwipeProgress() {
+        return Utilities.mapBoundToRange(
+                mSwipeProgress.value, 0, HINT_BOTTOM_FACTOR, 1, 0, LINEAR);
+    }
+
+    private void maybeResumeOrPauseBackgroundAnimation() {
+        boolean shouldPlayAnimation =
+                getContentViewAlphaForSwipeProgress() > ANIMATION_PAUSE_ALPHA_THRESHOLD
+                        && isResumed();
+        if (mAnimatedBackground.isAnimating() && !shouldPlayAnimation) {
+            mAnimatedBackground.pauseAnimation();
+        } else if (!mAnimatedBackground.isAnimating() && shouldPlayAnimation) {
+            mAnimatedBackground.resumeAnimation();
+        }
+    }
+
     private void onSwipeProgressUpdate() {
         mBackground.setProgress(mSwipeProgress.value);
-        float alpha = Utilities.mapBoundToRange(
-                mSwipeProgress.value, 0, HINT_BOTTOM_FACTOR, 1, 0, LINEAR);
+        float alpha = getContentViewAlphaForSwipeProgress();
         mContentView.setAlpha(alpha);
         mContentView.setTranslationY((alpha - 1) * mSwipeUpShift);
 
@@ -265,12 +288,7 @@ public class AllSetActivity extends Activity {
             mLauncherStartAnim.setPlayFraction(Utilities.mapBoundToRange(
                     mSwipeProgress.value, 0, 1, 0, 1, FAST_OUT_SLOW_IN));
         }
-
-        if (alpha == 0f) {
-            mAnimatedBackground.pauseAnimation();
-        } else if (!mAnimatedBackground.isAnimating()) {
-            mAnimatedBackground.resumeAnimation();
-        }
+        maybeResumeOrPauseBackgroundAnimation();
     }
 
     /**