/**
* @license
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
goog.provide('shaka.util.FakeEvent');
/**
* Create an Event work-alike object based on the provided dictionary.
* The event should contain all of the same properties from the dict.
*
* @param {string} type
* @param {Object=} dict
* @constructor
* @extends {Event}
*/
shaka.util.FakeEvent = function(type, dict = {}) {
// Take properties from dict if present.
for (let key in dict) {
this[key] = dict[key];
}
// The properties below cannot be set by the dict. They are all provided for
// compatibility with native events.
/** @const {boolean} */
this.bubbles = false;
/** @type {boolean} */
this.cancelable = false;
/** @type {boolean} */
this.defaultPrevented = false;
/**
* According to MDN, Chrome uses high-res timers instead of epoch time.
* Follow suit so that timeStamps on FakeEvents use the same base as
* on native Events.
* @const {number}
* @see https://developer.mozilla.org/en-US/docs/Web/API/Event/timeStamp
*/
this.timeStamp = window.performance && window.performance.now ?
window.performance.now() : Date.now();
/** @const {string} */
this.type = type;
/** @const {boolean} */
this.isTrusted = false;
/** @type {EventTarget} */
this.currentTarget = null;
/** @type {EventTarget} */
this.target = null;
/**
* Non-standard property read by FakeEventTarget to stop processing listeners.
* @type {boolean}
*/
this.stopped = false;
};
/**
* Prevents the default action of the event. Has no effect if the event isn't
* cancellable.
* @override
*/
shaka.util.FakeEvent.prototype.preventDefault = function() {
if (this.cancelable) {
this.defaultPrevented = true;
}
};
/**
* Stops processing event listeners for this event. Provided for compatibility
* with native Events.
* @override
*/
shaka.util.FakeEvent.prototype.stopImmediatePropagation = function() {
this.stopped = true;
};
/**
* Does nothing, since FakeEvents do not bubble. Provided for compatibility
* with native Events.
* @override
*/
shaka.util.FakeEvent.prototype.stopPropagation = function() {};