118 lines
3.1 KiB
JavaScript
118 lines
3.1 KiB
JavaScript
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/**
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* Copyright 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*
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*/
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'use strict';
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var _prodInvariant = require('./reactProdInvariant');
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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var PooledClass = require('./PooledClass');
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var invariant = require('fbjs/lib/invariant');
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/**
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* A specialized pseudo-event module to help keep track of components waiting to
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* be notified when their DOM representations are available for use.
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*
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* This implements `PooledClass`, so you should never need to instantiate this.
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* Instead, use `CallbackQueue.getPooled()`.
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*
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* @class ReactMountReady
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* @implements PooledClass
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* @internal
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*/
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var CallbackQueue = function () {
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function CallbackQueue(arg) {
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_classCallCheck(this, CallbackQueue);
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this._callbacks = null;
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this._contexts = null;
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this._arg = arg;
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}
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/**
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* Enqueues a callback to be invoked when `notifyAll` is invoked.
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*
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* @param {function} callback Invoked when `notifyAll` is invoked.
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* @param {?object} context Context to call `callback` with.
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* @internal
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*/
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CallbackQueue.prototype.enqueue = function enqueue(callback, context) {
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this._callbacks = this._callbacks || [];
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this._callbacks.push(callback);
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this._contexts = this._contexts || [];
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this._contexts.push(context);
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};
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/**
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* Invokes all enqueued callbacks and clears the queue. This is invoked after
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* the DOM representation of a component has been created or updated.
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*
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* @internal
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*/
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CallbackQueue.prototype.notifyAll = function notifyAll() {
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var callbacks = this._callbacks;
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var contexts = this._contexts;
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var arg = this._arg;
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if (callbacks && contexts) {
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!(callbacks.length === contexts.length) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Mismatched list of contexts in callback queue') : _prodInvariant('24') : void 0;
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this._callbacks = null;
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this._contexts = null;
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for (var i = 0; i < callbacks.length; i++) {
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callbacks[i].call(contexts[i], arg);
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}
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callbacks.length = 0;
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contexts.length = 0;
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}
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};
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CallbackQueue.prototype.checkpoint = function checkpoint() {
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return this._callbacks ? this._callbacks.length : 0;
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};
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CallbackQueue.prototype.rollback = function rollback(len) {
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if (this._callbacks && this._contexts) {
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this._callbacks.length = len;
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this._contexts.length = len;
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}
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};
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/**
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* Resets the internal queue.
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*
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* @internal
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*/
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CallbackQueue.prototype.reset = function reset() {
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this._callbacks = null;
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this._contexts = null;
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};
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/**
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* `PooledClass` looks for this.
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*/
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CallbackQueue.prototype.destructor = function destructor() {
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this.reset();
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};
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return CallbackQueue;
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}();
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module.exports = PooledClass.addPoolingTo(CallbackQueue);
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