add node layout event and pass it java layer

Summary: Listen to NodeLayout event and passes this event callback to java layer along with the information whether layout or measure was done in this pass

Reviewed By: davidaurelio

Differential Revision: D15696021

fbshipit-source-id: 8c5ca69330a9baca26b77052d4965cc67fe97c75

java/com/facebook/yoga/YogaEventListener.java

@@ -12,4 +12,6 @@ public interface YogaEventListener {
 
   void onNodeMeasure(YogaNode node);
 
+  void onNodeLayout(YogaNode node, boolean performLayout);
+
 }

yoga/Yoga.cpp

@@ -3670,7 +3670,7 @@ bool YGLayoutNodeInternal(
     YGMarkerLayoutData& layoutMarkerData,
     void* const layoutContext) {
 #ifdef YG_ENABLE_EVENTS
-  Event::publish<Event::NodeLayout>(node);
+  Event::publish<Event::NodeLayout>(node, {performLayout, layoutContext});
 #endif
   YGLayout* layout = &node->getLayout();
 

yoga/event/event.h

@@ -82,5 +82,11 @@ struct Event::TypedData<Event::NodeMeasure> {
   void* layoutContext;
 };
 
+template <>
+struct Event::TypedData<Event::NodeLayout> {
+  bool performLayout;
+  void* layoutContext;
+};
+
 } // namespace yoga
 } // namespace facebook