Expose new API FabricUIManager.getInspectorDataForInstance

Summary:
This diff exposes a new API in FabricUIManager called getInspectorDataForInstance. The goal of this method is to return React metadata for a Native view.

This data will be used from partner teams to build tools that uses React metadata in RN

Data returned from React: P429701924

changelog: [internal] internal

allow-large-files

Reviewed By: JoshuaGross

Differential Revision: D29747864

fbshipit-source-id: 8cb55573be08cb530f7e3c83eed8b4fcf43e7781

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

@@ -12,9 +12,11 @@ import androidx.annotation.NonNull;
 import com.facebook.jni.HybridData;
 import com.facebook.proguard.annotations.DoNotStrip;
 import com.facebook.react.bridge.NativeMap;
+import com.facebook.react.bridge.ReadableNativeMap;
 import com.facebook.react.bridge.RuntimeExecutor;
 import com.facebook.react.bridge.queue.MessageQueueThread;
 import com.facebook.react.fabric.events.EventBeatManager;
+import com.facebook.react.fabric.events.EventEmitterWrapper;
 import com.facebook.react.uimanager.PixelUtil;
 
 @DoNotStrip
@@ -76,6 +78,9 @@ public class Binding {
 
   public native void driveCxxAnimations();
 
+  public native ReadableNativeMap getInspectorDataForInstance(
+      EventEmitterWrapper eventEmitterWrapper);
+
   public void register(
       @NonNull RuntimeExecutor runtimeExecutor,
       @NonNull FabricUIManager fabricUIManager,

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

@@ -223,6 +223,16 @@ public class FabricUIManager implements UIManager, LifecycleEventListener {
     return rootTag;
   }
 
+  @UiThread
+  @ThreadConfined(UI)
+  public ReadableMap getInspectorDataForInstance(final int surfaceId, final View view) {
+    UiThreadUtil.assertOnUiThread();
+    int reactTag = view.getId();
+
+    EventEmitterWrapper eventEmitter = mMountingManager.getEventEmitter(surfaceId, reactTag);
+    return mBinding.getInspectorDataForInstance(eventEmitter);
+  }
+
   @Override
   public void preInitializeViewManagers(List<String> viewManagerNames) {
     for (String viewManagerName : viewManagerNames) {

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

@@ -233,6 +233,32 @@ std::shared_ptr<Scheduler> Binding::getScheduler() {
   return scheduler_;
 }
 
+jni::local_ref<ReadableNativeMap::jhybridobject>
+Binding::getInspectorDataForInstance(
+    jni::alias_ref<EventEmitterWrapper::javaobject> eventEmitterWrapper) {
+  std::shared_ptr<Scheduler> scheduler = getScheduler();
+  if (!scheduler) {
+    LOG(ERROR) << "Binding::startSurface: scheduler disappeared";
+    return ReadableNativeMap::newObjectCxxArgs(folly::dynamic::object());
+  }
+
+  EventEmitterWrapper *cEventEmitter = cthis(eventEmitterWrapper);
+  InspectorData data =
+      scheduler->getInspectorDataForInstance(cEventEmitter->eventEmitter);
+
+  folly::dynamic result = folly::dynamic::object;
+  result["fileName"] = data.fileName;
+  result["lineNumber"] = data.lineNumber;
+  result["columnNumber"] = data.columnNumber;
+  result["selectedIndex"] = data.selectedIndex;
+  auto hierarchy = folly::dynamic::array();
+  for (auto hierarchyItem : data.hierarchy) {
+    hierarchy.push_back(hierarchyItem);
+  }
+  result["hierarchy"] = hierarchy;
+  return ReadableNativeMap::newObjectCxxArgs(result);
+}
+
 void Binding::startSurface(
     jint surfaceId,
     jni::alias_ref<jstring> moduleName,
@@ -1314,6 +1340,8 @@ void Binding::registerNatives() {
       makeNativeMethod(
           "installFabricUIManager", Binding::installFabricUIManager),
       makeNativeMethod("startSurface", Binding::startSurface),
+      makeNativeMethod(
+          "getInspectorDataForInstance", Binding::getInspectorDataForInstance),
       makeNativeMethod(
           "startSurfaceWithConstraints", Binding::startSurfaceWithConstraints),
       makeNativeMethod(

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

@@ -15,10 +15,12 @@
 #include <react/renderer/scheduler/Scheduler.h>
 #include <react/renderer/scheduler/SchedulerDelegate.h>
 #include <react/renderer/uimanager/LayoutAnimationStatusDelegate.h>
+
 #include <memory>
 #include <mutex>
 #include "ComponentFactory.h"
 #include "EventBeatManager.h"
+#include "EventEmitterWrapper.h"
 #include "JBackgroundExecutor.h"
 #include "SurfaceHandlerBinding.h"
 
@@ -96,6 +98,9 @@ class Binding : public jni::HybridClass<Binding>,
       jboolean isRTL,
       jboolean doLeftAndRightSwapInRTL);
 
+  jni::local_ref<ReadableNativeMap::jhybridobject> getInspectorDataForInstance(
+      jni::alias_ref<EventEmitterWrapper::javaobject> eventEmitterWrapper);
+
   static jni::local_ref<jhybriddata> initHybrid(jni::alias_ref<jclass>);
 
   void installFabricUIManager(