Added ReactFabric shim

Summary:
A simple shim just like ReactNative.js
Plus a fork of renderApplication that exclusively will call ReactFabric.

Reviewed By: mdvacca

Differential Revision: D6919080

fbshipit-source-id: 5807105a6c45dd99584eb92a5570c6076e2d56b9

Libraries/ReactNative/renderFabricSurface.js

@@ -0,0 +1,62 @@
+/**
+ * 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.
+ *
+ * @providesModule renderFabricSurface
+ * @format
+ * @flow
+ */
+
+'use strict';
+
+const AppContainer = require('AppContainer');
+const React = require('React');
+const ReactFabric = require('ReactFabric');
+
+const invariant = require('fbjs/lib/invariant');
+
+// require BackHandler so it sets the default handler that exits the app if no listeners respond
+require('BackHandler');
+
+// Note: this is a fork of renderApplication.js to simply invoke ReactFabric.
+function renderFabricSurface<Props: Object>(
+  RootComponent: React.ComponentType<Props>,
+  initialProps: Props,
+  rootTag: any,
+  WrapperComponent?: ?React.ComponentType<*>,
+) {
+  invariant(rootTag, 'Expect to have a valid rootTag, instead got ', rootTag);
+
+  let renderable = (
+    <AppContainer rootTag={rootTag} WrapperComponent={WrapperComponent}>
+      <RootComponent {...initialProps} rootTag={rootTag} />
+    </AppContainer>
+  );
+
+  // If the root component is async, the user probably wants the initial render
+  // to be async also. To do this, wrap AppContainer with an async marker.
+  // For more info see https://fb.me/is-component-async
+  if (
+    RootComponent.prototype != null &&
+    RootComponent.prototype.unstable_isAsyncReactComponent === true
+  ) {
+    // $FlowFixMe This is not yet part of the official public API
+    class AppContainerAsyncWrapper extends React.unstable_AsyncComponent {
+      render() {
+        return this.props.children;
+      }
+    }
+
+    renderable = (
+      <AppContainerAsyncWrapper>{renderable}</AppContainerAsyncWrapper>
+    );
+  }
+
+  ReactFabric.render(renderable, rootTag);
+}
+
+module.exports = renderFabricSurface;

Libraries/Renderer/shims/ReactFabric.js

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @providesModule ReactFabric
+ * @flow
+ */
+'use strict';
+
+// TODO @sema: Adjust types
+import type {ReactNativeType} from 'ReactNativeTypes';
+
+let ReactFabric;
+
+if (__DEV__) {
+  ReactFabric = require('ReactFabric-dev');
+} else {
+  ReactFabric = require('ReactFabric-prod');
+}
+
+module.exports = (ReactFabric: ReactNativeType);