From f19a809f72ef8d1595ec82cbef295bec078ea207 Mon Sep 17 00:00:00 2001
From: "[1;3C" <erosky@google.com>
Date: Wed, 9 Dec 2020 13:28:22 -0800
Subject: [PATCH] Map shell transition to recents animation

This hooks up the essential start/finish. One thing to note
is that it uses the normal startActivity rather than a special
startRecents call for shell transitions.

Bug: 162503077
Test: Enable shell transit. Open an app, use gesture to open
      recents.
Change-Id: Ia51fa8baeb43bf3fa768b25a840b629ec94e16a1
---
 .../quickstep/TaskAnimationManager.java       | 23 +++++++++++++++++--
 .../quickstep/TouchInteractionService.java    |  2 +-
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/quickstep/src/com/android/quickstep/TaskAnimationManager.java b/quickstep/src/com/android/quickstep/TaskAnimationManager.java
index 6f2f86eac2..02c27636fc 100644
--- a/quickstep/src/com/android/quickstep/TaskAnimationManager.java
+++ b/quickstep/src/com/android/quickstep/TaskAnimationManager.java
@@ -21,7 +21,10 @@ import static com.android.quickstep.GestureState.GestureEndTarget.RECENTS;
 import static com.android.quickstep.GestureState.STATE_RECENTS_ANIMATION_INITIALIZED;
 import static com.android.quickstep.GestureState.STATE_RECENTS_ANIMATION_STARTED;
 
+import android.content.Context;
 import android.content.Intent;
+import android.os.Bundle;
+import android.os.SystemProperties;
 import android.util.Log;
 
 import androidx.annotation.UiThread;
@@ -30,11 +33,15 @@ import com.android.launcher3.Utilities;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.ActivityOptionsCompat;
 import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
+import com.android.systemui.shared.system.RemoteTransitionCompat;
 
 import java.util.function.Consumer;
 
 public class TaskAnimationManager implements RecentsAnimationCallbacks.RecentsAnimationListener {
+    public static final boolean ENABLE_SHELL_TRANSITIONS =
+            SystemProperties.getBoolean("persist.debug.shell_transit", false);
 
     private RecentsAnimationController mController;
     private RecentsAnimationCallbacks mCallbacks;
@@ -43,7 +50,11 @@ public class TaskAnimationManager implements RecentsAnimationCallbacks.RecentsAn
     private GestureState mLastGestureState;
     private RemoteAnimationTargetCompat mLastAppearedTaskTarget;
     private Consumer<RemoteAnimationTargetCompat> mLaunchOtherTaskHandler;
+    private Context mCtx;
 
+    TaskAnimationManager(Context ctx) {
+        mCtx = ctx;
+    }
     /**
      * Preloads the recents animation.
      */
@@ -122,8 +133,16 @@ public class TaskAnimationManager implements RecentsAnimationCallbacks.RecentsAn
         final long eventTime = gestureState.getSwipeUpStartTimeMs();
         mCallbacks.addListener(gestureState);
         mCallbacks.addListener(listener);
-        UI_HELPER_EXECUTOR.execute(() -> ActivityManagerWrapper.getInstance()
-                .startRecentsActivity(intent, eventTime, mCallbacks, null, null));
+
+        if (ENABLE_SHELL_TRANSITIONS) {
+            RemoteTransitionCompat transition = new RemoteTransitionCompat(mCallbacks,
+                    mController != null ? mController.getController() : null);
+            Bundle options = ActivityOptionsCompat.makeRemoteTransition(transition).toBundle();
+            mCtx.startActivity(intent, options);
+        } else {
+            UI_HELPER_EXECUTOR.execute(() -> ActivityManagerWrapper.getInstance()
+                    .startRecentsActivity(intent, eventTime, mCallbacks, null, null));
+        }
         gestureState.setState(STATE_RECENTS_ANIMATION_INITIALIZED);
         return mCallbacks;
     }
diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index 196cae754d..0f409374bb 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -309,7 +309,7 @@ public class TouchInteractionService extends Service implements PluginListener<O
 
     @UiThread
     public void onUserUnlocked() {
-        mTaskAnimationManager = new TaskAnimationManager();
+        mTaskAnimationManager = new TaskAnimationManager(this);
         mOverviewComponentObserver = new OverviewComponentObserver(this, mDeviceState);
         mOverviewCommandHelper = new OverviewCommandHelper(this, mDeviceState,
                 mOverviewComponentObserver);