/** * Copyright 2013-2015, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. * * @providesModule CallbackQueue */ 'use strict'; var PooledClass = require("./PooledClass"); var assign = require("./Object.assign"); var invariant = require("./invariant"); /** * A specialized pseudo-event module to help keep track of components waiting to * be notified when their DOM representations are available for use. * * This implements `PooledClass`, so you should never need to instantiate this. * Instead, use `CallbackQueue.getPooled()`. * * @class ReactMountReady * @implements PooledClass * @internal */ function CallbackQueue() { this._callbacks = null; this._contexts = null; } assign(CallbackQueue.prototype, { /** * Enqueues a callback to be invoked when `notifyAll` is invoked. * * @param {function} callback Invoked when `notifyAll` is invoked. * @param {?object} context Context to call `callback` with. * @internal */ enqueue: function(callback, context) { this._callbacks = this._callbacks || []; this._contexts = this._contexts || []; this._callbacks.push(callback); this._contexts.push(context); }, /** * Invokes all enqueued callbacks and clears the queue. This is invoked after * the DOM representation of a component has been created or updated. * * @internal */ notifyAll: function() { var callbacks = this._callbacks; var contexts = this._contexts; if (callbacks) { ("production" !== process.env.NODE_ENV ? invariant( callbacks.length === contexts.length, 'Mismatched list of contexts in callback queue' ) : invariant(callbacks.length === contexts.length)); this._callbacks = null; this._contexts = null; for (var i = 0, l = callbacks.length; i < l; i++) { callbacks[i].call(contexts[i]); } callbacks.length = 0; contexts.length = 0; } }, /** * Resets the internal queue. * * @internal */ reset: function() { this._callbacks = null; this._contexts = null; }, /** * `PooledClass` looks for this. */ destructor: function() { this.reset(); } }); PooledClass.addPoolingTo(CallbackQueue); module.exports = CallbackQueue;