feat[ReactFabricPrivateInterface]: add getInternalInstanceHandleFromP…

…ublicInstance (#41786)

Summary:
Pull Request resolved: #41786

Changelog: [Internal]

This is the preprequisite for facebook/react#27783

Reviewed By: rubennorte

Differential Revision: D51808831

fbshipit-source-id: c8ddf67d7ad35a670fa462c246dcb7230ba47716

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

@@ -8,6 +8,11 @@
  * @flow strict-local
  */
 
+/**
+ * This module is meant to be used by the React renderers to create public
+ * instances and get some data from them (like their instance handle / fiber).
+ */
+
 import type ReactNativeElement from '../../DOM/Nodes/ReactNativeElement';
 import type ReadOnlyText from '../../DOM/Nodes/ReadOnlyText';
 import typeof ReactFabricType from '../../Renderer/shims/ReactFabric';
@@ -79,3 +84,9 @@ export function getNodeFromPublicInstance(
  publicInstance.__internalInstanceHandle,
  );
 }
+
+export function getInternalInstanceHandleFromPublicInstance(
+ publicInstance: ReactFabricHostComponent | ReactNativeElement,
+): InternalInstanceHandle {
+ return publicInstance.__internalInstanceHandle;
+}

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

@@ -19,6 +19,7 @@ import typeof CustomEvent from '../Events/CustomEvent';
 import typeof {
  createPublicInstance,
  createPublicTextInstance,
+ getInternalInstanceHandleFromPublicInstance,
  getNativeTagFromPublicInstance,
  getNodeFromPublicInstance,
 } from '../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance';
@@ -108,4 +109,8 @@ module.exports = {
  return require('../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance')
  .getNodeFromPublicInstance;
  },
+ get getInternalInstanceHandleFromPublicInstance(): getInternalInstanceHandleFromPublicInstance {
+ return require('../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance')
+ .getInternalInstanceHandleFromPublicInstance;
+ },
 };