Merge "Send divider change to launcher to animate" into udc-dev am: 322d69469c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22538104

Change-Id: I8616f3e7f56e83086c2032d94dc2b4c540c27378
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java

@@ -431,6 +431,11 @@ public class RecentsTransitionHandler implements Transitions.TransitionHandler {
                                 "  adding opening taskId=%d", taskInfo.taskId);
                         mOpeningTasks.add(new TaskState(change, target.leash));
                     }
+                } else if (TransitionUtil.isDividerBar(change)) {
+                    final RemoteAnimationTarget target = TransitionUtil.newTarget(change,
+                            info.getChanges().size() - i, info, t, mLeashMap);
+                    // Add this as a app and we will separate them on launcher side by window type.
+                    apps.add(target);
                 }
             }
             t.apply();

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java

@@ -2788,8 +2788,8 @@ public class StageCoordinator implements SplitLayout.SplitLayoutHandler,
     }
 
     /** Call this when starting the open-recents animation while split-screen is active. */
-    public void onRecentsInSplitAnimationStart(@NonNull SurfaceControl.Transaction t) {
+    public void onRecentsInSplitAnimationStart(TransitionInfo info) {
-        setDividerVisibility(false, t);
+        addDividerBarToTransition(info, false /* show */);
     }
 
     /** Call this when the recents animation during split-screen finishes. */
@@ -2806,6 +2806,7 @@ public class StageCoordinator implements SplitLayout.SplitLayoutHandler,
                     || mSideStage.containsContainer(container))) {
                 updateSurfaceBounds(mSplitLayout, finishT,
                         false /* applyResizingOffset */);
+                finishT.reparent(mSplitLayout.getDividerLeash(), mRootTaskLeash);
                 setDividerVisibility(true, finishT);
                 return;
             }

libs/WindowManager/Shell/src/com/android/wm/shell/transition/DefaultMixedHandler.java

@@ -524,7 +524,7 @@ public class DefaultMixedHandler implements Transitions.TransitionHandler,
             finishCallback.onTransitionFinished(wct, wctCB);
         };
         mixed.mInFlightSubAnimations = 1;
-        mSplitHandler.onRecentsInSplitAnimationStart(startTransaction);
+        mSplitHandler.onRecentsInSplitAnimationStart(info);
         final boolean handled = mixed.mLeftoversHandler.startAnimation(mixed.mTransition, info,
                 startTransaction, finishTransaction, finishCB);
         if (!handled) {

libs/WindowManager/Shell/src/com/android/wm/shell/util/TransitionUtil.java

@@ -110,6 +110,11 @@ public class TransitionUtil {
                 && !change.hasFlags(FLAG_IN_TASK_WITH_EMBEDDED_ACTIVITY);
     }
 
+    /** Returns `true` if `change` is the divider. */
+    public static boolean isDividerBar(TransitionInfo.Change change) {
+        return isNonApp(change) && change.hasFlags(FLAG_IS_DIVIDER_BAR);
+    }
+
     /** Returns `true` if `change` is only re-ordering. */
     public static boolean isOrderOnly(TransitionInfo.Change change) {
         return change.getMode() == TRANSIT_CHANGE
@@ -175,6 +180,14 @@ public class TransitionUtil {
         t.setPosition(leash, absBounds.left - info.getRoot(rootIdx).getOffset().x,
                 absBounds.top - info.getRoot(rootIdx).getOffset().y);
 
+        if (isDividerBar(change)) {
+            if (isOpeningType(mode)) {
+                t.setAlpha(leash, 0.f);
+            }
+            t.setLayer(leash, Integer.MAX_VALUE);
+            return;
+        }
+
         // Put all the OPEN/SHOW on top
         if (TransitionUtil.isOpeningType(mode)) {
             if (isOpening) {
@@ -245,6 +258,10 @@ public class TransitionUtil {
      */
     public static RemoteAnimationTarget newTarget(TransitionInfo.Change change, int order,
             SurfaceControl leash) {
+        if (isDividerBar(change)) {
+            return getDividerTarget(change, leash);
+        }
+
         int taskId;
         boolean isNotInRecents;
         ActivityManager.RunningTaskInfo taskInfo;
@@ -284,8 +301,7 @@ public class TransitionUtil {
                 new Rect(change.getStartAbsBounds()),
                 taskInfo,
                 change.getAllowEnterPip(),
-                (change.getFlags() & FLAG_IS_DIVIDER_BAR) != 0
+                INVALID_WINDOW_TYPE
-                        ? TYPE_DOCK_DIVIDER : INVALID_WINDOW_TYPE
         );
         target.setWillShowImeOnTarget(
                 (change.getFlags() & TransitionInfo.FLAG_WILL_IME_SHOWN) != 0);
@@ -293,6 +309,17 @@ public class TransitionUtil {
         return target;
     }
 
+    private static RemoteAnimationTarget getDividerTarget(TransitionInfo.Change change,
+            SurfaceControl leash) {
+        return new RemoteAnimationTarget(-1 /* taskId */, -1 /* mode */,
+                leash, false /* isTranslucent */, null /* clipRect */,
+                null /* contentInsets */, Integer.MAX_VALUE /* prefixOrderIndex */,
+                new android.graphics.Point(0, 0) /* position */, change.getStartAbsBounds(),
+                change.getStartAbsBounds(), new WindowConfiguration(), true, null /* startLeash */,
+                null /* startBounds */, null /* taskInfo */, false /* allowEnterPip */,
+                TYPE_DOCK_DIVIDER);
+    }
+
     /**
      * Finds the "correct" root idx for a change. The change's end display is prioritized, then
      * the start display. If there is no display, it will fallback on the 0th root in the

libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitTransitionTests.java

@@ -273,7 +273,7 @@ public class SplitTransitionTests extends ShellTestCase {
         // simulate the start of recents transition
         mMainStage.onTaskVanished(mMainChild);
         mSideStage.onTaskVanished(mSideChild);
-        mStageCoordinator.onRecentsInSplitAnimationStart(mock(SurfaceControl.Transaction.class));
+        mStageCoordinator.onRecentsInSplitAnimationStart(mock(TransitionInfo.class));
         assertTrue(mStageCoordinator.isSplitScreenVisible());
 
         // Make sure it cleans-up if recents doesn't restore
@@ -307,7 +307,7 @@ public class SplitTransitionTests extends ShellTestCase {
         // simulate the start of recents transition
         mMainStage.onTaskVanished(mMainChild);
         mSideStage.onTaskVanished(mSideChild);
-        mStageCoordinator.onRecentsInSplitAnimationStart(mock(SurfaceControl.Transaction.class));
+        mStageCoordinator.onRecentsInSplitAnimationStart(mock(TransitionInfo.class));
         assertTrue(mStageCoordinator.isSplitScreenVisible());
 
         // Make sure we remain in split after recents restores.