Add synchronous transaction to wait for setInputWindow to complete (5/n)

Added syncInputWindows method to JNI and SurfaceControl.Transaction

This enables the caller to request SF to wait until input windows have
been synced with InputDispatcher.

Bug: 123041491
Test: builds, runs
Change-Id: I2ddaa3f43eded2fb117cc2850ee7c8a20b2b63ec

1 files changed, 12 insertions, 0 deletions

diff --git a/core/java/android/view/SurfaceControl.java b/core/java/android/view/SurfaceControl.java
index 1212df0c397a..5227875f40ce 100644
--- a/core/java/android/view/SurfaceControl.java
+++ b/core/java/android/view/SurfaceControl.java
@@ -189,6 +189,7 @@ public final class SurfaceControl implements Parcelable {
             IBinder toToken);
     private static native boolean nativeGetProtectedContentSupport();
     private static native void nativeSetMetadata(long transactionObj, int key, Parcel data);
+    private static native void nativeSyncInputWindows(long transactionObj);
 
     private final CloseGuard mCloseGuard = CloseGuard.get();
     private String mName;
@@ -2105,6 +2106,17 @@ public final class SurfaceControl implements Parcelable {
         }
 
         /**
+         * Waits until any changes to input windows have been sent from SurfaceFlinger to
+         * InputFlinger before returning.
+         *
+         * @hide
+         */
+        public Transaction syncInputWindows() {
+            nativeSyncInputWindows(mNativeObject);
+            return this;
+        }
+
+        /**
          * Specify how the buffer assosciated with this Surface is mapped in to the
          * parent coordinate space. The source frame will be scaled to fit the destination
          * frame, after being rotated according to the orientation parameter.