mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Sebastian Markbage
27c482a2b8
ReactClass is now composed by ReactCompositeComponent rather than inherit from it. The state transition functions currently use ReactInstanceMap to map an instance back to an internal representation. I updated some tests to use public APIs. Other unit tests still reach into internals but now we can find them using ReactInstanceMap. I will do more cleanup in follow ups. The purpose of this diff is to preserve semantics and most of the existing code. This effectively enables support for ES6 classes. All you would need to expose is ReactClassMixin.
104 lines
2.8 KiB
JavaScript
104 lines
2.8 KiB
JavaScript
/**
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* Copyright 2013-2014 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @providesModule ReactRef
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*/
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"use strict";
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var ReactUpdates = require('ReactUpdates');
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var accumulate = require('accumulate');
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var assign = require('Object.assign');
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var forEachAccumulated = require('forEachAccumulated');
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var invariant = require('invariant');
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function ReactRef() {
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this._value = null;
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this._successCallbacks = null;
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this._failureCallbacks = null;
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}
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/**
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* Call the enqueued success or failure callbacks for a ref, as appropriate.
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*/
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function dispatchCallbacks() {
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/*jshint validthis:true */
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var successCallbacks = this._successCallbacks;
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var failureCallbacks = this._failureCallbacks;
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this._successCallbacks = null;
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this._failureCallbacks = null;
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if (this._value) {
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forEachAccumulated(successCallbacks, callSuccess, this);
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} else {
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forEachAccumulated(failureCallbacks, callFailure);
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}
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}
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/**
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* Call a single success callback, passing the ref's value.
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*/
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function callSuccess(cb) {
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/*jshint validthis:true */
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cb(this._value);
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}
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/**
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* Call a single failure callback, passing no arguments.
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*/
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function callFailure(cb) {
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cb();
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}
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assign(ReactRef.prototype, {
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/**
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* Get the value of a ref asynchronously. Accepts a success callback and an
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* optional failure callback. If the ref has been rendered, the success
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* callback will be called with the component instance; otherwise, the failure
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* callback will be executed.
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*
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* @param {function} success Callback in case of success
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* @param {?function} failure Callback in case of failure
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*/
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then: function(success, failure) {
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invariant(
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typeof success === 'function',
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'ReactRef.then(...): Must provide a success callback.'
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);
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if (this._successCallbacks == null) {
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ReactUpdates.asap(dispatchCallbacks, this);
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}
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this._successCallbacks = accumulate(this._successCallbacks, success);
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if (failure) {
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this._failureCallbacks = accumulate(this._failureCallbacks, failure);
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}
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}
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});
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ReactRef.attachRef = function(ref, value) {
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ref._value = value.getPublicInstance();
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};
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ReactRef.detachRef = function(ref, value) {
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// Check that `component` is still the current ref because we do not want to
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// detach the ref if another component stole it.
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if (ref._value === value) {
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ref._value = null;
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}
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};
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module.exports = ReactRef;
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