Merge "Change the activity reparent to animate at TaskFragment level." into sc-v2-dev am: 21f6fdd842

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15938346

Change-Id: I7289e0d841942d52bca2d4fd6d621958a71741f8

services/core/java/com/android/server/wm/ActivityRecord.java

@@ -1411,9 +1411,8 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         this.task = newTask;
 
         if (shouldStartChangeTransition(newParent, oldParent)) {
-            // The new parent and old parent may be in different position. Need to offset the
+            // Animate change transition on TaskFragment level to get the correct window crop.
-            // animation surface to keep it in its original position.
+            newParent.initializeChangeTransition(getBounds(), getSurfaceControl());
-            initializeChangeTransition(getBounds(), newParent.getBounds());
         }
 
         super.onParentChanged(newParent, oldParent);

services/core/java/com/android/server/wm/AppTransitionController.java

@@ -343,9 +343,6 @@ public class AppTransitionController {
             switch (changingType) {
                 case TYPE_TASK:
                     return TRANSIT_OLD_TASK_CHANGE_WINDOWING_MODE;
-                case TYPE_ACTIVITY:
-                    // ActivityRecord is put in a change transition only when it is reparented
-                    // to an organized TaskFragment. See ActivityRecord#shouldStartChangeTransition.
                 case TYPE_TASK_FRAGMENT:
                     return TRANSIT_OLD_TASK_FRAGMENT_CHANGE;
                 default:

services/core/java/com/android/server/wm/SurfaceFreezer.java

@@ -72,8 +72,11 @@ class SurfaceFreezer {
      *
      * @param startBounds The original bounds (on screen) of the surface we are snapshotting.
      * @param relativePosition The related position of the snapshot surface to its parent.
+     * @param freezeTarget The surface to take snapshot from. If {@code null}, we will take a
+     *                     snapshot from the {@link #mAnimatable} surface.
      */
-    void freeze(SurfaceControl.Transaction t, Rect startBounds, Point relativePosition) {
+    void freeze(SurfaceControl.Transaction t, Rect startBounds, Point relativePosition,
+            @Nullable SurfaceControl freezeTarget) {
         mFreezeBounds.set(startBounds);
 
         mLeash = SurfaceAnimator.createAnimationLeash(mAnimatable, mAnimatable.getSurfaceControl(),
@@ -82,7 +85,7 @@ class SurfaceFreezer {
                 mWmService.mTransactionFactory);
         mAnimatable.onAnimationLeashCreated(t, mLeash);
 
-        SurfaceControl freezeTarget = mAnimatable.getFreezeSnapshotTarget();
+        freezeTarget = freezeTarget != null ? freezeTarget : mAnimatable.getFreezeSnapshotTarget();
         if (freezeTarget != null) {
             SurfaceControl.ScreenshotHardwareBuffer screenshotBuffer = createSnapshotBuffer(
                     freezeTarget, startBounds);

services/core/java/com/android/server/wm/WindowContainer.java

@@ -2620,23 +2620,27 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
      * For now, this will only be called for the following cases:
      * 1. {@link Task} is changing windowing mode between fullscreen and freeform.
      * 2. {@link TaskFragment} is organized and is changing window bounds.
-     * 3. {@link ActivityRecord} is reparented into an organized {@link TaskFragment}.
+     * 3. {@link ActivityRecord} is reparented into an organized {@link TaskFragment}. (The
+     *    transition will happen on the {@link TaskFragment} for this case).
      *
-     * This shouldn't be called on other {@link WindowContainer} unless there is a valid use case.
+     * This shouldn't be called on other {@link WindowContainer} unless there is a valid
+     * use case.
      *
      * @param startBounds The original bounds (on screen) of the surface we are snapshotting.
-     * @param parentBounds The parent bounds (on screen) to calculate the animation surface
+     * @param freezeTarget The surface to take snapshot from. If {@code null}, we will take a
-     *                     position.
+     *                     snapshot from {@link #getFreezeSnapshotTarget()}.
      */
-    void initializeChangeTransition(Rect startBounds, Rect parentBounds) {
+    void initializeChangeTransition(Rect startBounds, @Nullable SurfaceControl freezeTarget) {
         mDisplayContent.prepareAppTransition(TRANSIT_CHANGE);
         mDisplayContent.mChangingContainers.add(this);
+        // Calculate the relative position in parent container.
+        final Rect parentBounds = getParent().getBounds();
         mTmpPoint.set(startBounds.left - parentBounds.left, startBounds.top - parentBounds.top);
-        mSurfaceFreezer.freeze(getSyncTransaction(), startBounds, mTmpPoint);
+        mSurfaceFreezer.freeze(getSyncTransaction(), startBounds, mTmpPoint, freezeTarget);
     }
 
     void initializeChangeTransition(Rect startBounds) {
-        initializeChangeTransition(startBounds, getParent().getBounds());
+        initializeChangeTransition(startBounds, null /* freezeTarget */);
     }
 
     ArraySet<WindowContainer> getAnimationSources() {

services/tests/wmtests/src/com/android/server/wm/AppTransitionTests.java

@@ -35,6 +35,8 @@ import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentat
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doNothing;
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.spyOn;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.verify;
 import static com.android.server.wm.WindowContainer.POSITION_TOP;
 
 import static org.junit.Assert.assertEquals;
@@ -42,6 +44,7 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
 
 import android.graphics.Rect;
 import android.os.Binder;
@@ -54,6 +57,7 @@ import android.view.IRemoteAnimationFinishedCallback;
 import android.view.IRemoteAnimationRunner;
 import android.view.RemoteAnimationAdapter;
 import android.view.RemoteAnimationTarget;
+import android.view.SurfaceControl;
 import android.view.WindowManager;
 import android.window.ITaskFragmentOrganizer;
 import android.window.TaskFragmentOrganizer;
@@ -397,7 +401,9 @@ public class AppTransitionTests extends WindowTestsBase {
     @Test
     public void testActivityRecordReparentToTaskFragment() {
         final ActivityRecord activity = createActivityRecord(mDc);
+        final SurfaceControl activityLeash = mock(SurfaceControl.class);
         activity.setVisibility(true);
+        activity.setSurfaceControl(activityLeash);
         final Task task = activity.getTask();
 
         // Add a TaskFragment of half of the Task size.
@@ -412,15 +418,20 @@ public class AppTransitionTests extends WindowTestsBase {
         final Rect taskBounds = new Rect();
         task.getBounds(taskBounds);
         taskFragment.setBounds(0, 0, taskBounds.right / 2, taskBounds.bottom);
+        spyOn(taskFragment);
 
         assertTrue(mDc.mChangingContainers.isEmpty());
         assertFalse(mDc.mAppTransition.isTransitionSet());
 
         // Schedule app transition when reparent activity to a TaskFragment of different size.
+        final Rect startBounds = new Rect(activity.getBounds());
         activity.reparent(taskFragment, POSITION_TOP);
 
-        assertTrue(mDc.mChangingContainers.contains(activity));
+        // It should transit at TaskFragment level with snapshot on the activity surface.
+        verify(taskFragment).initializeChangeTransition(activity.getBounds(), activityLeash);
+        assertTrue(mDc.mChangingContainers.contains(taskFragment));
         assertTrue(mDc.mAppTransition.containsTransitRequest(TRANSIT_CHANGE));
+        assertEquals(startBounds, taskFragment.mSurfaceFreezer.mFreezeBounds);
     }
 
     private class TestRemoteAnimationRunner implements IRemoteAnimationRunner {