Using synthetic recents transitions for Recents in Window

Bug: 366021931
Flag: com.android.launcher3.enable_fallback_overview_in_window
Test: manual with enableFallbackOverviewInWindow=true
Change-Id: I26fbc96373b55f0a4a87756fa99347f0e4f4361b

quickstep/src/com/android/quickstep/GestureState.java

@@ -36,6 +36,7 @@ import android.view.RemoteAnimationTarget;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.launcher3.Flags;
 import com.android.launcher3.statemanager.BaseState;
 import com.android.launcher3.statemanager.StatefulContainer;
 import com.android.quickstep.TopTaskTracker.CachedTaskInfo;
@@ -301,6 +302,16 @@ public class GestureState implements RecentsAnimationCallbacks.RecentsAnimationL
         return mTrackpadGestureType == TrackpadGestureType.FOUR_FINGER;
     }
 
+    /**
+     * Requests that handling for this gesture should use a synthetic transition, as in that it
+     * will need to start a recents transition that is not backed by a system transition.  This is
+     * generally only needed in scenarios where a system transition can not be created due to no
+     * changes in the WM hierarchy (ie. starting recents transition when you are already over home).
+     */
+    public boolean useSyntheticRecentsTransition() {
+        return mRunningTask.isHomeTask() && Flags.enableFallbackOverviewInWindow();
+    }
+
     /**
      * @return the running task for this gesture.
      */

quickstep/src/com/android/quickstep/RecentsAnimationCallbacks.java

@@ -15,7 +15,9 @@
  */
 package com.android.quickstep;
 
+import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
 import static android.view.RemoteAnimationTarget.MODE_CLOSING;
+import static android.view.RemoteAnimationTarget.MODE_OPENING;
 import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
 
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
@@ -29,6 +31,7 @@ import androidx.annotation.BinderThread;
 import androidx.annotation.NonNull;
 import androidx.annotation.UiThread;
 
+import com.android.launcher3.Flags;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.util.Preconditions;
 import com.android.quickstep.util.ActiveGestureProtoLogProxy;
@@ -102,7 +105,11 @@ public class RecentsAnimationCallbacks implements
         long appCount = Arrays.stream(appTargets)
                 .filter(app -> app.mode == MODE_CLOSING)
                 .count();
-        if (appCount == 0) {
+
+        boolean isOpeningHome = Arrays.stream(appTargets).filter(app -> app.mode == MODE_OPENING
+                        && app.windowConfiguration.getActivityType() == ACTIVITY_TYPE_HOME)
+                .count() > 0;
+        if (appCount == 0 && (!Flags.enableFallbackOverviewInWindow() || isOpeningHome)) {
             ActiveGestureProtoLogProxy.logOnRecentsAnimationStartCancelled();
             // Edge case, if there are no closing app targets, then Launcher has nothing to handle
             notifyAnimationCanceled();

quickstep/src/com/android/quickstep/SystemUiProxy.java

@@ -1535,7 +1535,7 @@ public class SystemUiProxy implements ISystemUiProxy, NavHandle, SafeCloseable {
      * Starts the recents activity. The caller should manage the thread on which this is called.
      */
     public boolean startRecentsActivity(Intent intent, ActivityOptions options,
-            RecentsAnimationListener listener) {
+            RecentsAnimationListener listener, boolean useSyntheticRecentsTransition) {
         if (mRecentTasks == null) {
             ActiveGestureProtoLogProxy.logRecentTasksMissing();
             return false;
@@ -1566,6 +1566,9 @@ public class SystemUiProxy implements ISystemUiProxy, NavHandle, SafeCloseable {
             }
         };
         final Bundle optsBundle = options.toBundle();
+        if (useSyntheticRecentsTransition) {
+            optsBundle.putBoolean("is_synthetic_recents_transition", true);
+        }
         try {
             mRecentTasks.startRecentsTransition(mRecentsPendingIntent, intent, optsBundle,
                     mContext.getIApplicationThread(), runner);

quickstep/src/com/android/quickstep/TaskAnimationManager.java

@@ -296,8 +296,8 @@ public class TaskAnimationManager implements RecentsAnimationCallbacks.RecentsAn
         // TODO:(b/365777482) if flag is enabled, but on launcher it will crash.
         if(containerInterface.getCreatedContainer() instanceof RecentsWindowManager
                 && Flags.enableFallbackOverviewInWindow()){
-            mRecentsAnimationStartPending =
-                    getSystemUiProxy().startRecentsActivity(intent, options, mCallbacks);
+            mRecentsAnimationStartPending = getSystemUiProxy().startRecentsActivity(intent, options,
+                    mCallbacks, gestureState.useSyntheticRecentsTransition());
             mRecentsWindowsManager.startRecentsWindow(mCallbacks);
         } else {
             options.setPendingIntentBackgroundActivityStartMode(
@@ -326,9 +326,10 @@ public class TaskAnimationManager implements RecentsAnimationCallbacks.RecentsAn
                 });
             }
 
-            mRecentsAnimationStartPending = getSystemUiProxy()
-                    .startRecentsActivity(intent, options, mCallbacks);
+            mRecentsAnimationStartPending = getSystemUiProxy().startRecentsActivity(intent,
+                    options, mCallbacks, false /* useSyntheticRecentsTransition */);
         }
+
         if (enableHandleDelayedGestureCallbacks()) {
             ActiveGestureProtoLogProxy.logSettingRecentsAnimationStartPending(
                     mRecentsAnimationStartPending);

quickstep/src/com/android/quickstep/util/SplitSelectStateController.java

@@ -900,7 +900,7 @@ public class SplitSelectStateController {
                 SystemUiProxy.INSTANCE.get(mLauncher.getApplicationContext())
                         .startRecentsActivity(
                                 mOverviewComponentObserver.getOverviewIntent(), options,
-                                callbacks);
+                                callbacks, false /* useSyntheticRecentsTransition */);
             });
         }
 

quickstep/src/com/android/quickstep/util/SplitWithKeyboardShortcutController.java

@@ -99,7 +99,8 @@ public class SplitWithKeyboardShortcutController {
                 options.setTransientLaunch();
                 SystemUiProxy.INSTANCE.get(mLauncher.getApplicationContext())
                         .startRecentsActivity(mOverviewComponentObserver.getOverviewIntent(),
-                                ActivityOptions.makeBasic(), callbacks);
+                                ActivityOptions.makeBasic(), callbacks,
+                                false /* useSyntheticRecentsTransition */);
             });
         });
     }

quickstep/tests/src/com/android/quickstep/TaskAnimationManagerTest.java

@@ -17,8 +17,8 @@
 package com.android.quickstep;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assume.assumeTrue;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
@@ -73,7 +73,8 @@ public class TaskAnimationManagerTest {
 
         final ArgumentCaptor<ActivityOptions> optionsCaptor =
                 ArgumentCaptor.forClass(ActivityOptions.class);
-        verify(mSystemUiProxy).startRecentsActivity(any(), optionsCaptor.capture(), any());
+        verify(mSystemUiProxy)
+                .startRecentsActivity(any(), optionsCaptor.capture(), any(), anyBoolean());
         assertEquals(ActivityOptions.MODE_BACKGROUND_ACTIVITY_START_ALLOW_ALWAYS,
                 optionsCaptor.getValue().getPendingIntentBackgroundActivityStartMode());
     }