Merge "Fix pip update transaction out of order" into tm-qpr-dev

libs/WindowManager/Shell/src/com/android/wm/shell/pip/PipTaskOrganizer.java

@@ -63,6 +63,7 @@ import android.graphics.Rect;
 import android.os.RemoteException;
 import android.os.SystemClock;
 import android.util.Log;
+import android.view.Choreographer;
 import android.view.Display;
 import android.view.Surface;
 import android.view.SurfaceControl;
@@ -179,8 +180,10 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
                 // This is necessary in case there was a resize animation ongoing when exit PIP
                 // started, in which case the first resize will be skipped to let the exit
                 // operation handle the final resize out of PIP mode. See b/185306679.
-                finishResize(tx, destinationBounds, direction, animationType);
-                sendOnPipTransitionFinished(direction);
+                finishResizeDelayedIfNeeded(() -> {
+                    finishResize(tx, destinationBounds, direction, animationType);
+                    sendOnPipTransitionFinished(direction);
+                });
             }
         }
 
@@ -196,6 +199,39 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
         }
     };
 
+    /**
+     * Finishes resizing the PiP, delaying the operation if it has to be synced with the PiP menu.
+     *
+     * This is done to avoid a race condition between the last transaction applied in
+     * onPipAnimationUpdate and the finishResize in onPipAnimationEnd. The transaction in
+     * onPipAnimationUpdate is applied directly from WmShell, while onPipAnimationEnd creates a
+     * WindowContainerTransaction in finishResize, which is to be applied by WmCore later. Normally,
+     * the WCT should be the last transaction to finish the animation. However, it  may happen that
+     * it gets applied *before* the transaction created by the last onPipAnimationUpdate. This
+     * happens only when the PiP surface transaction has to be synced with the PiP menu due to the
+     * necessity for a delay when syncing the PiP surface animation with the PiP menu surface
+     * animation and redrawing the PiP menu contents. As a result, the PiP surface gets scaled after
+     * the new bounds are applied by WmCore, which makes the PiP surface have unexpected bounds.
+     *
+     * To avoid this, we delay the finishResize operation until
+     * the next frame. This aligns the last onAnimationUpdate transaction with the WCT application.
+     */
+    private void finishResizeDelayedIfNeeded(Runnable finishResizeRunnable) {
+        if (!shouldSyncPipTransactionWithMenu()) {
+            finishResizeRunnable.run();
+            return;
+        }
+
+        // Delay the finishResize to the next frame
+        Choreographer.getInstance().postCallback(Choreographer.CALLBACK_COMMIT, () -> {
+            mMainExecutor.execute(finishResizeRunnable);
+        }, null);
+    }
+
+    private boolean shouldSyncPipTransactionWithMenu() {
+        return mPipMenuController.isMenuVisible();
+    }
+
     @VisibleForTesting
     final PipTransitionController.PipTransitionCallback mPipTransitionCallback =
             new PipTransitionController.PipTransitionCallback() {
@@ -221,7 +257,7 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
                 @Override
                 public boolean handlePipTransaction(SurfaceControl leash,
                         SurfaceControl.Transaction tx, Rect destinationBounds) {
-                    if (mPipMenuController.isMenuVisible()) {
+                    if (shouldSyncPipTransactionWithMenu()) {
                         mPipMenuController.movePipMenu(leash, tx, destinationBounds);
                         return true;
                     }
@@ -1223,7 +1259,7 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
         mSurfaceTransactionHelper
                 .crop(tx, mLeash, toBounds)
                 .round(tx, mLeash, mPipTransitionState.isInPip());
-        if (mPipMenuController.isMenuVisible()) {
+        if (shouldSyncPipTransactionWithMenu()) {
             mPipMenuController.resizePipMenu(mLeash, tx, toBounds);
         } else {
             tx.apply();
@@ -1265,7 +1301,7 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
         mSurfaceTransactionHelper
                 .scale(tx, mLeash, startBounds, toBounds, degrees)
                 .round(tx, mLeash, startBounds, toBounds);
-        if (mPipMenuController.isMenuVisible()) {
+        if (shouldSyncPipTransactionWithMenu()) {
             mPipMenuController.movePipMenu(mLeash, tx, toBounds);
         } else {
             tx.apply();