Merge "Set window crop for TaskFragment open/close animation" into sc-v2-dev am: ddd87bf8d9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16239964

Change-Id: Iad7ac0667b9f8593c5dfb431ddf3ebd97b1b1ee2

1 files changed, 18 insertions, 2 deletions

diff --git a/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/TaskFragmentAnimationAdapter.java b/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/TaskFragmentAnimationAdapter.java
index 194b6330d92c..89d7a407e459 100644
--- a/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/TaskFragmentAnimationAdapter.java
+++ b/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/TaskFragmentAnimationAdapter.java
@@ -39,6 +39,8 @@ class TaskFragmentAnimationAdapter {
 
     final Transformation mTransformation = new Transformation();
     final float[] mMatrix = new float[9];
+    final float[] mVecs = new float[4];
+    final Rect mRect = new Rect();
     private boolean mIsFirstFrame = true;
 
     TaskFragmentAnimationAdapter(@NonNull Animation animation,
@@ -76,6 +78,22 @@ class TaskFragmentAnimationAdapter {
                 mTarget.localBounds.left, mTarget.localBounds.top);
         t.setMatrix(mLeash, mTransformation.getMatrix(), mMatrix);
         t.setAlpha(mLeash, mTransformation.getAlpha());
+
+        // Open/close animation may scale up the surface. Apply an inverse scale to the window crop
+        // so that it will not be covering other windows.
+        mVecs[1] = mVecs[2] = 0;
+        mVecs[0] = mVecs[3] = 1;
+        mTransformation.getMatrix().mapVectors(mVecs);
+        mVecs[0] = 1.f / mVecs[0];
+        mVecs[3] = 1.f / mVecs[3];
+        final Rect clipRect = mTarget.localBounds;
+        mRect.left = (int) (clipRect.left * mVecs[0] + 0.5f);
+        mRect.right = (int) (clipRect.right * mVecs[0] + 0.5f);
+        mRect.top = (int) (clipRect.top * mVecs[3] + 0.5f);
+        mRect.bottom = (int) (clipRect.bottom * mVecs[3] + 0.5f);
+        mRect.offsetTo(Math.round(mTarget.localBounds.width() * (1 - mVecs[0]) / 2.f),
+                Math.round(mTarget.localBounds.height() * (1 - mVecs[3]) / 2.f));
+        t.setWindowCrop(mLeash, mRect);
     }
 
     /** Called after animation finished. */
@@ -157,8 +175,6 @@ class TaskFragmentAnimationAdapter {
      * Should be used for the animation of the {@link RemoteAnimationTarget} that has size change.
      */
     static class BoundsChangeAdapter extends TaskFragmentAnimationAdapter {
-        private final float[] mVecs = new float[4];
-        private final Rect mRect = new Rect();
 
         BoundsChangeAdapter(@NonNull Animation animation, @NonNull RemoteAnimationTarget target) {
             super(animation, target);