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/**
* 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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