1 files changed, 58 insertions, 0 deletions
diff --git a/android/view/accessibility/SendViewScrolledAccessibilityEvent.java b/android/view/accessibility/SendViewScrolledAccessibilityEvent.java
new file mode 100644
index 00000000..40a1b6a2
--- /dev/null
+++ b/android/view/accessibility/SendViewScrolledAccessibilityEvent.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2017 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 android.view.accessibility;
+
+
+import android.annotation.NonNull;
+import android.view.View;
+
+/**
+ * Sender for {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event.
+ *
+ * @hide
+ */
+public class SendViewScrolledAccessibilityEvent extends ThrottlingAccessibilityEventSender {
+
+    public int mDeltaX;
+    public int mDeltaY;
+
+    /**
+     * Post a scroll event to be sent for the given view
+     */
+    public void post(View source, int dx, int dy) {
+        if (!isPendingFor(source)) sendNowIfPending();
+
+        mDeltaX += dx;
+        mDeltaY += dy;
+
+        if (!isPendingFor(source)) scheduleFor(source);
+    }
+
+    @Override
+    protected void performSendEvent(@NonNull View source) {
+        AccessibilityEvent event = AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_SCROLLED);
+        event.setScrollDeltaX(mDeltaX);
+        event.setScrollDeltaY(mDeltaY);
+        source.sendAccessibilityEventUnchecked(event);
+    }
+
+    @Override
+    protected void resetState(@NonNull View source) {
+        mDeltaX = 0;
+        mDeltaY = 0;
+    }
+}