Add fabric option to the default app template.

Summary:
Changelog: [internal] Added fabric option to the default app template.

Use RCT_TM_FABRIC_ENABLED C++ flag to enable fabric.

Reviewed By: sammy-SC

Differential Revision: D33052956

fbshipit-source-id: 28313829c80abcf02baa521bdb0b70213c94a97f

Author: sota000

React/AppSetup/RCTAppSetupUtils.h

@@ -30,9 +30,9 @@
 
 @interface RCTAppSetupUtils : NSObject
 + (void)prepareApp:(UIApplication *_Nonnull)application;
-+ (RCTRootView *_Nonnull)defaultRootViewWithBridge:(RCTBridge *_Nonnull)bridge
-                                        moduleName:(NSString *_Nonnull)moduleName
-                                 initialProperties:(nullable NSDictionary *)initialProperties;
++ (UIView *_Nonnull)defaultRootViewWithBridge:(RCTBridge *_Nonnull)bridge
+                                   moduleName:(NSString *_Nonnull)moduleName
+                            initialProperties:(nullable NSDictionary *)initialProperties;
 
 #if RCT_TM_FABRIC_ENABLED
 + (id<RCTTurboModule> _Nonnull)defaultModuleInstanceFromClass:(Class _Nonnull)moduleClass;

React/AppSetup/RCTAppSetupUtils.mm

@@ -8,6 +8,7 @@
 #import "RCTAppSetupUtils.h"
 
 #if RCT_TM_FABRIC_ENABLED
+// Turbo Module
 #import <React/CoreModulesPlugins.h>
 #import <React/RCTDataRequestHandler.h>
 #import <React/RCTFileRequestHandler.h>
@@ -17,6 +18,9 @@
 #import <React/RCTJSIExecutorRuntimeInstaller.h>
 #import <React/RCTLocalAssetImageLoader.h>
 #import <React/RCTNetworking.h>
+
+// Fabric
+#import <React/RCTFabricSurfaceHostingProxyRootView.h>
 #endif
 
 #ifdef FB_SONARKIT_ENABLED
@@ -53,11 +57,17 @@ + (void)prepareApp:(UIApplication *)application
 #endif
 }
 
-+ (RCTRootView *)defaultRootViewWithBridge:(RCTBridge *)bridge
-                                moduleName:(NSString *)moduleName
-                         initialProperties:(NSDictionary *)initialProperties
++ (UIView *)defaultRootViewWithBridge:(RCTBridge *)bridge
+                           moduleName:(NSString *)moduleName
+                    initialProperties:(NSDictionary *)initialProperties
 {
+#if RCT_TM_FABRIC_ENABLED
+  return [[RCTFabricSurfaceHostingProxyRootView alloc] initWithBridge:bridge
+                                                           moduleName:moduleName
+                                                    initialProperties:initialProperties];
+#else
   return [[RCTRootView alloc] initWithBridge:bridge moduleName:moduleName initialProperties:initialProperties];
+#endif
 }
 
 #if RCT_TM_FABRIC_ENABLED

template/ios/HelloWorld/AppDelegate.mm

@@ -10,9 +10,17 @@
 #import <React/CoreModulesPlugins.h>
 #import <React/RCTCxxBridgeDelegate.h>
 #import <ReactCommon/RCTTurboModuleManager.h>
+#import <React/RCTFabricSurfaceHostingProxyRootView.h>
+#import <React/RCTSurfacePresenter.h>
+#import <React/RCTSurfacePresenterBridgeAdapter.h>
+
+#import <react/config/ReactNativeConfig.h>
 
 @interface AppDelegate () <RCTCxxBridgeDelegate, RCTTurboModuleManagerDelegate> {
   RCTTurboModuleManager *_turboModuleManager;
+  RCTSurfacePresenterBridgeAdapter *_bridgeAdapter;
+  std::shared_ptr<const facebook::react::ReactNativeConfig> _reactNativeConfig;
+  facebook::react::ContextContainer::Shared _contextContainer;
 }
 @end
 #endif
@@ -24,7 +32,16 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
   [RCTAppSetupUtils prepareApp: application];
 
   RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
-  RCTRootView *rootView = [RCTAppSetupUtils defaultRootViewWithBridge:bridge
+
+#if RCT_TM_FABRIC_ENABLED
+  _contextContainer = std::make_shared<facebook::react::ContextContainer const>();
+  _reactNativeConfig = std::make_shared<facebook::react::EmptyReactNativeConfig const>();
+  _contextContainer->insert("ReactNativeConfig", _reactNativeConfig);
+  _bridgeAdapter = [[RCTSurfacePresenterBridgeAdapter alloc] initWithBridge:bridge contextContainer:_contextContainer];
+  bridge.surfacePresenter = _bridgeAdapter.surfacePresenter;
+#endif
+
+  UIView *rootView = [RCTAppSetupUtils defaultRootViewWithBridge:bridge
                                    moduleName:@"HelloWorld"
                            initialProperties:nil];