DivestOS/Patches/LineageOS-20.0/ASB-2024-06/fwb-06.patch

From b403e48e6aff45880c2970102555cc77cdcfe322 Mon Sep 17 00:00:00 2001
From: Riddle Hsu <riddlehsu@google.com>
Date: Tue, 6 Feb 2024 17:19:37 +0800
Subject: [PATCH] Hide window immediately if itself doesn't run hide animation

The condition was overextended in commit 9bca6b4 which checks if the
parent container of the window is animating. That causes the window to
wait for animation finish to update visibility, but the animation
finish callback won't happen because itself is not animating. Then the
window that should be hidden remains on screen.

Bug: 302431573
Test: atest WindowStateTests#testIsOnScreen_hiddenByPolicy
(cherry picked from commit 9add9281ffc120c81a7d125892803f1beb5ddcb3)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:10a7f0914c87f4af521b5cbb13e84a83dacebf82)
Merged-In: Iafc2b2c2a24d8fc8d147354ef2f0b4afeeb510c5
Change-Id: Iafc2b2c2a24d8fc8d147354ef2f0b4afeeb510c5
---
 .../com/android/server/wm/WindowState.java    |  6 ++++--
 .../android/server/wm/WindowStateTests.java   | 20 +++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/services/core/java/com/android/server/wm/WindowState.java b/services/core/java/com/android/server/wm/WindowState.java
index 6d6e84f611cf..0ba2f2f2f418 100644
--- a/services/core/java/com/android/server/wm/WindowState.java
+++ b/services/core/java/com/android/server/wm/WindowState.java
@@ -3296,8 +3296,10 @@ boolean hide(boolean doAnimation, boolean requestAnim) {
             return false;
         }
         if (doAnimation) {
-            mWinAnimator.applyAnimationLocked(TRANSIT_EXIT, false);
-            if (!isAnimating(TRANSITION | PARENTS)) {
+            // If a hide animation is applied, then let onAnimationFinished
+            // -> checkPolicyVisibilityChange hide the window. Otherwise make doAnimation false
+            // to commit invisible immediately.
+            if (!mWinAnimator.applyAnimationLocked(TRANSIT_EXIT, false /* isEntrance */)) {
                 doAnimation = false;
             }
         }
diff --git a/services/tests/wmtests/src/com/android/server/wm/WindowStateTests.java b/services/tests/wmtests/src/com/android/server/wm/WindowStateTests.java
index 219f4415c623..44ae8dde9bde 100644
--- a/services/tests/wmtests/src/com/android/server/wm/WindowStateTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/WindowStateTests.java
@@ -227,6 +227,26 @@ public void testIsOnScreen_hiddenByPolicy() {
         assertTrue(window.isOnScreen());
         window.hide(false /* doAnimation */, false /* requestAnim */);
         assertFalse(window.isOnScreen());
+
+        // Verifies that a window without animation can be hidden even if its parent is animating.
+        window.show(false /* doAnimation */, false /* requestAnim */);
+        assertTrue(window.isVisibleByPolicy());
+        window.getParent().startAnimation(mTransaction, mock(AnimationAdapter.class),
+                false /* hidden */, SurfaceAnimator.ANIMATION_TYPE_WINDOW_ANIMATION);
+        window.mAttrs.windowAnimations = 0;
+        window.hide(true /* doAnimation */, true /* requestAnim */);
+        assertFalse(window.isSelfAnimating(0, SurfaceAnimator.ANIMATION_TYPE_WINDOW_ANIMATION));
+        assertFalse(window.isVisibleByPolicy());
+        assertFalse(window.isOnScreen());
+
+        // Verifies that a window with animation can be hidden after the hide animation is finished.
+        window.show(false /* doAnimation */, false /* requestAnim */);
+        window.mAttrs.windowAnimations = android.R.style.Animation_Dialog;
+        window.hide(true /* doAnimation */, true /* requestAnim */);
+        assertTrue(window.isSelfAnimating(0, SurfaceAnimator.ANIMATION_TYPE_WINDOW_ANIMATION));
+        assertTrue(window.isVisibleByPolicy());
+        window.cancelAnimation();
+        assertFalse(window.isVisibleByPolicy());
     }
 
     @Test