githubmr/facebook-react: The library for web and native user interfaces.

packages/react-native-renderer/src/ReactNativeComponentTree.js

60 строк2 KB

Eli White

[Native] Add FeatureFlag to dispatch events with instance currentTarget (#17345)

11 ноя 2019, 23:42

11 ноя 2019, 23:423dcec3a

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import invariant from 'shared/invariant';

import {enableNativeTargetAsInstance} from 'shared/ReactFeatureFlags';

const instanceCache = new Map();
const instanceProps = new Map();

export function precacheFiberNode(hostInst, tag) {
  instanceCache.set(tag, hostInst);
}

export function uncacheFiberNode(tag) {
  instanceCache.delete(tag);
  instanceProps.delete(tag);
}

function getInstanceFromTag(tag) {
  return instanceCache.get(tag) || null;
}

function getTagFromInstance(inst) {
  if (enableNativeTargetAsInstance) {
    let nativeInstance = inst.stateNode;
    let tag = nativeInstance._nativeTag;
    if (tag === undefined) {
      nativeInstance = nativeInstance.canonical;
      tag = nativeInstance._nativeTag;
    }
    invariant(tag, 'All native instances should have a tag.');
    return nativeInstance;
  } else {
    let tag = inst.stateNode._nativeTag;
    if (tag === undefined) {
      tag = inst.stateNode.canonical._nativeTag;
    }
    invariant(tag, 'All native instances should have a tag.');
    return tag;
  }
}

export {
  getInstanceFromTag as getClosestInstanceFromNode,
  getInstanceFromTag as getInstanceFromNode,
  getTagFromInstance as getNodeFromInstance,
};

export function getFiberCurrentPropsFromNode(stateNode) {
  return instanceProps.get(stateNode._nativeTag) || null;
}

export function updateFiberProps(tag, props) {
  instanceProps.set(tag, props);
}