iOS: Added scaffolding for FabricUIManager native module

Summary: Experimental scaffolding for FabricUIManager.

Reviewed By: mdvacca

Differential Revision: D6908587

fbshipit-source-id: 646fcc72f54dce736378a7777e5753ed56efc2f6

React/Fabric/RCTFabricUIManager.h

@@ -0,0 +1,17 @@
+/**
+ * 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.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTBridge.h>
+#import <React/RCTBridgeModule.h>
+
+@interface RCTFabricUIManager : NSObject<RCTBridgeModule>
+
+@end

React/Fabric/RCTFabricUIManager.mm

@@ -0,0 +1,66 @@
+/**
+ * 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.
+ */
+
+#import "RCTFabricUIManager.h"
+
+// This file contains experimental placeholders, nothing is finalized.
+@implementation RCTFabricUIManager
+
+@synthesize bridge = _bridge;
+
+RCT_EXPORT_MODULE()
+
+RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, createNode:(int)reactTag
+                                                  viewName:(NSString *)viewName
+                                                   rootTag:(int)rootTag
+                                                     props:(NSDictionary *)props
+                                            instanceHandle:(int)instanceHandleID)
+{
+  return @0;
+}
+
+RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNode:(int)nodeID)
+{
+  return @0;
+}
+
+RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNodeWithNewChildren:(int)nodeID)
+{
+  return @0;
+}
+
+RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNodeWithNewProps:(int)nodeID newProps:(NSDictionary *)newProps)
+{
+  return @0;
+}
+
+RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNodeWithNewChildrenAndProps:(int)nodeID newProps:(NSDictionary *)newProps)
+{
+  return @0;
+}
+
+RCT_EXPORT_METHOD(appendChild:(int)parentNodeID child:(int)childNodeID)
+{
+
+}
+
+RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, createChildSet)
+{
+  return @0;
+}
+
+RCT_EXPORT_METHOD(appendChildToSet:(int)childSetID child:(int)childNodeID)
+{
+}
+
+RCT_EXPORT_METHOD(completeRoot:(int)rootTag childSet:(int)childSetID)
+{
+}
+
+@end