From 870927314e29d7428e34b9e35c5c1a364582c2df Mon Sep 17 00:00:00 2001
From: Riddle Hsu <riddlehsu@google.com>
Date: Wed, 1 Mar 2023 15:40:20 +0800
Subject: [PATCH] Preempt recents animation if display is changed

This aligns the same behavior as [1]. Then the recents animation
can be finished, and the animating activity can be stopped with
a screenshot as the replacement. So the default rotation transition
animation can continue to play.

[1]:I41278e78b491c4b956e49b8b1fea40b470252aab

Bug: 271099935
Test: Enable rotation for launcher.
      Launch app and rotate to landscape and enter recents.
      Rotate to portrait.
      There should be a normal rotation animation
Change-Id: Ieb9ccb13ad0b4bdad880c4c90388cdd75affef34
---
 .../systemui/shared/system/RemoteTransitionCompat.java     | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/SystemUI/shared/src/com/android/systemui/shared/system/RemoteTransitionCompat.java b/packages/SystemUI/shared/src/com/android/systemui/shared/system/RemoteTransitionCompat.java
index 2a37bd370b7ca..488a675d5ca20 100644
--- a/packages/SystemUI/shared/src/com/android/systemui/shared/system/RemoteTransitionCompat.java
+++ b/packages/SystemUI/shared/src/com/android/systemui/shared/system/RemoteTransitionCompat.java
@@ -219,6 +219,13 @@ public class RemoteTransitionCompat {
                         foundRecentsClosing = true;
                     }
                 } else if (change.getMode() == TRANSIT_CHANGE) {
+                    // Finish recents animation if the display is changed, so the default
+                    // transition handler can play the animation such as rotation effect.
+                    if (change.hasFlags(TransitionInfo.FLAG_IS_DISPLAY)) {
+                        mListener.onSwitchToScreenshot(() -> finish(false /* toHome */,
+                                false /* userLeaveHint */));
+                        return false;
+                    }
                     hasChangingApp = true;
                 }
             }