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Diffstat (limited to 'node_modules/react-dom/lib/CallbackQueue.js')
-rw-r--r-- | node_modules/react-dom/lib/CallbackQueue.js | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/CallbackQueue.js b/node_modules/react-dom/lib/CallbackQueue.js new file mode 100644 index 000000000..4405c5f49 --- /dev/null +++ b/node_modules/react-dom/lib/CallbackQueue.js @@ -0,0 +1,118 @@ +/** + * Copyright 2013-present, 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. + * + * + */ + +'use strict'; + +var _prodInvariant = require('./reactProdInvariant'); + +function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } + +var PooledClass = require('./PooledClass'); + +var invariant = require('fbjs/lib/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 + */ + +var CallbackQueue = function () { + function CallbackQueue(arg) { + _classCallCheck(this, CallbackQueue); + + this._callbacks = null; + this._contexts = null; + this._arg = arg; + } + + /** + * 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 + */ + + + CallbackQueue.prototype.enqueue = function enqueue(callback, context) { + this._callbacks = this._callbacks || []; + this._callbacks.push(callback); + this._contexts = this._contexts || []; + 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 + */ + + + CallbackQueue.prototype.notifyAll = function notifyAll() { + var callbacks = this._callbacks; + var contexts = this._contexts; + var arg = this._arg; + if (callbacks && contexts) { + !(callbacks.length === contexts.length) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Mismatched list of contexts in callback queue') : _prodInvariant('24') : void 0; + this._callbacks = null; + this._contexts = null; + for (var i = 0; i < callbacks.length; i++) { + callbacks[i].call(contexts[i], arg); + } + callbacks.length = 0; + contexts.length = 0; + } + }; + + CallbackQueue.prototype.checkpoint = function checkpoint() { + return this._callbacks ? this._callbacks.length : 0; + }; + + CallbackQueue.prototype.rollback = function rollback(len) { + if (this._callbacks && this._contexts) { + this._callbacks.length = len; + this._contexts.length = len; + } + }; + + /** + * Resets the internal queue. + * + * @internal + */ + + + CallbackQueue.prototype.reset = function reset() { + this._callbacks = null; + this._contexts = null; + }; + + /** + * `PooledClass` looks for this. + */ + + + CallbackQueue.prototype.destructor = function destructor() { + this.reset(); + }; + + return CallbackQueue; +}(); + +module.exports = PooledClass.addPoolingTo(CallbackQueue);
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