Implement ReactNativePrivateInterface.createPublicTextInstance

Summary:
This exposes a new method in the private interface used by React so we can merge facebook/react#26516

We're adding support for text instances in React Native (as defined in react-native-community/discussions-and-proposals#607). See D44632362 for the full implementation.

Changelog: [internal]

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Reviewed By: sammy-SC

Differential Revision: D44663223

fbshipit-source-id: 70ca3ca9d2edefaa73a396f43c2d560c6d1422f1

packages/react-native/Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance.js

@@ -178,6 +178,13 @@ export function createPublicInstance(
   return new ReactFabricHostComponent(tag, viewConfig, internalInstanceHandle);
 }
 
+export function createPublicTextInstance(internalInstanceHandle: mixed): {} {
+  // React will call this method to create text instances but we'll return an
+  // empty object for now. These instances are only created lazily when
+  // traversing the tree, and that's not enabled yet.
+  return {};
+}
+
 export function getNativeTagFromPublicInstance(
   publicInstance: ReactFabricHostComponent,
 ): number {

packages/react-native/Libraries/ReactPrivate/ReactNativePrivateInterface.js

@@ -18,6 +18,7 @@ import typeof RCTEventEmitter from '../EventEmitter/RCTEventEmitter';
 import typeof CustomEvent from '../Events/CustomEvent';
 import typeof {
   createPublicInstance,
+  createPublicTextInstance,
   getNativeTagFromPublicInstance,
   getNodeFromPublicInstance,
 } from '../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance';
@@ -94,6 +95,10 @@ module.exports = {
     return require('../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance')
       .createPublicInstance;
   },
+  get createPublicTextInstance(): createPublicTextInstance {
+    return require('../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance')
+      .createPublicTextInstance;
+  },
   get getNativeTagFromPublicInstance(): getNativeTagFromPublicInstance {
     return require('../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance')
       .getNativeTagFromPublicInstance;