[ReactNative] Send debug component ownership info in createView

Libraries/DebugComponentHierarchy/RCTDebugComponentOwnership.js

@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * Utility class to provide the component owner hierarchy to native code for
+ * debugging purposes.
+ *
+ * @providesModule RCTDebugComponentOwnership
+ * @flow
+ */
+
+'use strict';
+
+var DebugComponentOwnershipModule = require('NativeModules').DebugComponentOwnershipModule;
+var InspectorUtils = require('InspectorUtils');
+var ReactNativeTagHandles = require('ReactNativeTagHandles');
+
+function componentToString(component) {
+  return component.getName ? component.getName() : 'Unknown';
+}
+
+function getRootTagForTag(tag: number): ?number {
+  var rootNodeID = ReactNativeTagHandles.tagToRootNodeID[tag];
+  if (!rootNodeID) {
+    return null;
+  }
+  var rootID = ReactNativeTagHandles.getNativeTopRootIDFromNodeID(rootNodeID);
+  if (!rootID) {
+    return null;
+  }
+  return ReactNativeTagHandles.rootNodeIDToTag[rootID];
+}
+
+module.exports = {
+
+  /**
+   * Asynchronously returns the owner hierarchy as an array of strings. Request id is
+   * passed along to the native module so that the native module can identify the
+   * particular call instance.
+   *
+   * Example returned owner hierarchy: ['RootView', 'Dialog', 'TitleView', 'Text']
+   */
+  getOwnerHierarchy: function(requestID: number, tag: number) {
+    var rootTag = getRootTagForTag(tag);
+    var instance = InspectorUtils.findInstanceByNativeTag(rootTag, tag);
+    var ownerHierarchy = instance ?
+        InspectorUtils.getOwnerHierarchy(instance).map(componentToString) :
+        null;
+    DebugComponentOwnershipModule.receiveOwnershipHierarchy(requestID, tag, ownerHierarchy);
+  },
+};

Libraries/JavaScriptAppEngine/Initialization/InitializeJavaScriptAppEngine.js

@@ -23,6 +23,7 @@
 /* globals GLOBAL: true, window: true */
 
 // Just to make sure the JS gets packaged up.
+require('RCTDebugComponentOwnership');
 require('RCTDeviceEventEmitter');
 require('PerformanceLogger');