Reset PiP shadow radius in onTaskVanished

This is a follow-up of ag/17527240 in which we do not cover the case
that a Task in pinned mode is directly removed via Task#moveTaskToBack

Video: http://recall/-/aaaaaabFQoRHlzixHdtY/cMG5Uh1kLC7EyAs2EbDVkM
Bug: 228793904
Test: follow the reproduce step in bug, see video
Test: atest WMShellUnitTests:PipTaskOrganizerTest
Change-Id: Ib7472908a81d56d34216ca272afbd9f1a2668b89

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

@@ -924,6 +924,7 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
             removeContentOverlay(mSwipePipToHomeOverlay, null /* callback */);
             mSwipePipToHomeOverlay = null;
         }
+        resetShadowRadius();
         mPipTransitionState.setInSwipePipToHomeTransition(false);
         mPictureInPictureParams = null;
         mPipTransitionState.setTransitionState(PipTransitionState.UNDEFINED);
@@ -1569,13 +1570,28 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
             // Avoid double removal, which is fatal.
             return;
         }
-        final SurfaceControl.Transaction tx =
-                mSurfaceControlTransactionFactory.getTransaction();
+        final SurfaceControl.Transaction tx = mSurfaceControlTransactionFactory.getTransaction();
         tx.remove(surface);
         tx.apply();
         if (callback != null) callback.run();
     }
 
+    private void resetShadowRadius() {
+        if (mPipTransitionState.getTransitionState() == PipTransitionState.UNDEFINED) {
+            // mLeash is undefined when in PipTransitionState.UNDEFINED
+            return;
+        }
+        final SurfaceControl.Transaction tx = mSurfaceControlTransactionFactory.getTransaction();
+        tx.setShadowRadius(mLeash, 0f);
+        tx.apply();
+    }
+
+    @VisibleForTesting
+    public void setSurfaceControlTransactionFactory(
+            PipSurfaceTransactionHelper.SurfaceControlTransactionFactory factory) {
+        mSurfaceControlTransactionFactory = factory;
+    }
+
     /**
      * Dumps internal states.
      */

libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/pip/PipAnimationControllerTest.java

@@ -30,7 +30,6 @@ import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.verify;
 
 import android.app.TaskInfo;
-import android.graphics.Matrix;
 import android.graphics.Rect;
 import android.testing.AndroidTestingRunner;
 import android.testing.TestableLooper;
@@ -104,7 +103,7 @@ public class PipAnimationControllerTest extends ShellTestCase {
         final PipAnimationController.PipTransitionAnimator oldAnimator = mPipAnimationController
                 .getAnimator(mTaskInfo, mLeash, baseValue, startValue, endValue1, null,
                         TRANSITION_DIRECTION_TO_PIP, 0, ROTATION_0);
-        oldAnimator.setSurfaceControlTransactionFactory(DummySurfaceControlTx::new);
+        oldAnimator.setSurfaceControlTransactionFactory(PipDummySurfaceControlTx::new);
         oldAnimator.start();
 
         final PipAnimationController.PipTransitionAnimator newAnimator = mPipAnimationController
@@ -134,7 +133,7 @@ public class PipAnimationControllerTest extends ShellTestCase {
 
     @Test
     public void pipTransitionAnimator_rotatedEndValue() {
-        final DummySurfaceControlTx tx = new DummySurfaceControlTx();
+        final PipDummySurfaceControlTx tx = new PipDummySurfaceControlTx();
         final Rect startBounds = new Rect(200, 700, 400, 800);
         final Rect endBounds = new Rect(0, 0, 500, 1000);
         // Fullscreen to PiP.
@@ -184,7 +183,7 @@ public class PipAnimationControllerTest extends ShellTestCase {
         final PipAnimationController.PipTransitionAnimator animator = mPipAnimationController
                 .getAnimator(mTaskInfo, mLeash, baseValue, startValue, endValue, null,
                         TRANSITION_DIRECTION_TO_PIP, 0, ROTATION_0);
-        animator.setSurfaceControlTransactionFactory(DummySurfaceControlTx::new);
+        animator.setSurfaceControlTransactionFactory(PipDummySurfaceControlTx::new);
 
         animator.setPipAnimationCallback(mPipAnimationCallback);
 
@@ -201,44 +200,4 @@ public class PipAnimationControllerTest extends ShellTestCase {
         verify(mPipAnimationCallback).onPipAnimationEnd(eq(mTaskInfo),
                 any(SurfaceControl.Transaction.class), eq(animator));
     }
-
-    /**
-     * A dummy {@link SurfaceControl.Transaction} class.
-     * This is created as {@link Mock} does not support method chaining.
-     */
-    public static class DummySurfaceControlTx extends SurfaceControl.Transaction {
-        @Override
-        public SurfaceControl.Transaction setAlpha(SurfaceControl leash, float alpha) {
-            return this;
-        }
-
-        @Override
-        public SurfaceControl.Transaction setPosition(SurfaceControl leash, float x, float y) {
-            return this;
-        }
-
-        @Override
-        public SurfaceControl.Transaction setWindowCrop(SurfaceControl leash, int w, int h) {
-            return this;
-        }
-
-        @Override
-        public SurfaceControl.Transaction setCornerRadius(SurfaceControl leash, float radius) {
-            return this;
-        }
-
-        @Override
-        public SurfaceControl.Transaction setMatrix(SurfaceControl leash, Matrix matrix,
-                float[] float9) {
-            return this;
-        }
-
-        @Override
-        public SurfaceControl.Transaction setFrameTimelineVsync(long frameTimelineVsyncId) {
-            return this;
-        }
-
-        @Override
-        public void apply() {}
-    }
 }

libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/pip/PipDummySurfaceControlTx.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.wm.shell.pip;
+
+import android.graphics.Matrix;
+import android.view.SurfaceControl;
+
+/**
+ * A dummy {@link SurfaceControl.Transaction} class for testing purpose and supports
+ * method chaining.
+ */
+public class PipDummySurfaceControlTx extends SurfaceControl.Transaction {
+    @Override
+    public SurfaceControl.Transaction setAlpha(SurfaceControl leash, float alpha) {
+        return this;
+    }
+
+    @Override
+    public SurfaceControl.Transaction setPosition(SurfaceControl leash, float x, float y) {
+        return this;
+    }
+
+    @Override
+    public SurfaceControl.Transaction setWindowCrop(SurfaceControl leash, int w, int h) {
+        return this;
+    }
+
+    @Override
+    public SurfaceControl.Transaction setCornerRadius(SurfaceControl leash, float radius) {
+        return this;
+    }
+
+    @Override
+    public SurfaceControl.Transaction setShadowRadius(SurfaceControl leash, float radius) {
+        return this;
+    }
+
+    @Override
+    public SurfaceControl.Transaction setMatrix(SurfaceControl leash, Matrix matrix,
+            float[] float9) {
+        return this;
+    }
+
+    @Override
+    public SurfaceControl.Transaction setFrameTimelineVsync(long frameTimelineVsyncId) {
+        return this;
+    }
+
+    @Override
+    public void apply() {}
+}
+

libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/pip/PipTaskOrganizerTest.java

@@ -242,6 +242,7 @@ public class PipTaskOrganizerTest extends ShellTestCase {
         mPipBoundsState.setDisplayLayout(new DisplayLayout(info,
                 mContext.getResources(), true, true));
         mSpiedPipTaskOrganizer.setOneShotAnimationType(PipAnimationController.ANIM_TYPE_ALPHA);
+        mSpiedPipTaskOrganizer.setSurfaceControlTransactionFactory(PipDummySurfaceControlTx::new);
         doNothing().when(mSpiedPipTaskOrganizer).enterPipWithAlphaAnimation(any(), anyLong());
         doNothing().when(mSpiedPipTaskOrganizer).scheduleAnimateResizePip(any(), anyInt(), any());
     }