Make setStylusHandwritingRegion param immutable

Copy the Region to set so that its unmodifiable after the fact.

Fix: 379894953
Bug: 350047836
Test: atest StylusHandwritingTest
Flag: android.view.inputmethod.adaptive_handwriting_bounds
Change-Id: I249d9d6db09048feab8da2a12721e829c9a09a5d

1 files changed, 5 insertions, 4 deletions

diff --git a/core/java/android/inputmethodservice/InputMethodService.java b/core/java/android/inputmethodservice/InputMethodService.java
index 5f3c15d1842e..4c9e73c8b21f 100644
--- a/core/java/android/inputmethodservice/InputMethodService.java
+++ b/core/java/android/inputmethodservice/InputMethodService.java
@@ -3202,7 +3202,8 @@ public class InputMethodService extends AbstractInputMethodService {
      */
     @FlaggedApi(Flags.FLAG_ADAPTIVE_HANDWRITING_BOUNDS)
     public final void setStylusHandwritingRegion(@NonNull Region handwritingRegion) {
-        if (handwritingRegion.equals(mLastHandwritingRegion)) {
+        final Region immutableHandwritingRegion = new Region(handwritingRegion);
+        if (immutableHandwritingRegion.equals(mLastHandwritingRegion)) {
             Log.v(TAG, "Failed to set setStylusHandwritingRegion():"
                     + " same region set twice.");
             return;
@@ -3210,10 +3211,10 @@ public class InputMethodService extends AbstractInputMethodService {
 
         if (DEBUG) {
             Log.d(TAG, "Setting new handwriting region for stylus handwriting "
-                    + handwritingRegion + " from last " + mLastHandwritingRegion);
+                    + immutableHandwritingRegion + " from last " + mLastHandwritingRegion);
         }
-        mPrivOps.setHandwritingTouchableRegion(handwritingRegion);
-        mLastHandwritingRegion = handwritingRegion;
+        mPrivOps.setHandwritingTouchableRegion(immutableHandwritingRegion);
+        mLastHandwritingRegion = immutableHandwritingRegion;
     }
 
     /**