Android implementation of sendAccessibilityEvent

Summary:
This is the Android native implementation of sendAccessibilityEvent for Fabric.

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D25852418

fbshipit-source-id: cb51e667a7f673da6b9c9e539770225b02bdc902

ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java

@@ -25,6 +25,7 @@ import android.content.Context;
 import android.graphics.Point;
 import android.os.SystemClock;
 import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
 import androidx.annotation.AnyThread;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -1005,6 +1006,23 @@ public class FabricUIManager implements UIManager, LifecycleEventListener {
     addMountItem(new SendAccessibilityEvent(reactTag, eventType));
   }
 
+  @AnyThread
+  @ThreadConfined(ANY)
+  public void sendAccessibilityEventFromJS(int reactTag, String eventTypeJS) {
+    int eventType;
+    if ("focus".equals(eventTypeJS)) {
+      eventType = AccessibilityEvent.TYPE_VIEW_FOCUSED;
+    } else if ("windowStateChange".equals(eventTypeJS)) {
+      eventType = AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED;
+    } else if ("click".equals(eventTypeJS)) {
+      eventType = AccessibilityEvent.TYPE_VIEW_CLICKED;
+    } else {
+      throw new IllegalArgumentException(
+          "sendAccessibilityEventFromJS: invalid eventType " + eventTypeJS);
+    }
+    addMountItem(new SendAccessibilityEvent(reactTag, eventType));
+  }
+
   /**
    * Set the JS responder for the view associated with the tags received as a parameter.
    *

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/Binding.cpp

@@ -1071,6 +1071,26 @@ void Binding::schedulerDidDispatchCommand(
       localJavaUIManager, shadowView.tag, command.get(), argsArray.get());
 }
 
+void Binding::schedulerDidSendAccessibilityEvent(
+    const ShadowView &shadowView,
+    std::string const &eventType) {
+  jni::global_ref<jobject> localJavaUIManager = getJavaUIManager();
+  if (!localJavaUIManager) {
+    LOG(ERROR)
+        << "Binding::schedulerDidDispatchCommand: JavaUIManager disappeared";
+    return;
+  }
+
+  local_ref<JString> eventTypeStr = make_jstring(eventType);
+
+  static auto sendAccessibilityEventFromJS =
+      jni::findClassStatic(Binding::UIManagerJavaDescriptor)
+          ->getMethod<void(jint, jstring)>("sendAccessibilityEventFromJS");
+
+  sendAccessibilityEventFromJS(
+      localJavaUIManager, shadowView.tag, eventTypeStr.get());
+}
+
 void Binding::schedulerDidSetJSResponder(
     SurfaceId surfaceId,
     const ShadowView &shadowView,

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/Binding.h

@@ -136,6 +136,10 @@ class Binding : public jni::HybridClass<Binding>,
       std::string const &commandName,
       folly::dynamic const args) override;
 
+  void schedulerDidSendAccessibilityEvent(
+      const ShadowView &shadowView,
+      std::string const &eventType) override;
+
   void schedulerDidSetJSResponder(
       SurfaceId surfaceId,
       const ShadowView &shadowView,