mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-16 16:16:40 +03:00
Theodore Abshire
111 lines
2.8 KiB
JavaScript
111 lines
2.8 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.util.FakeEvent');
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/**
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* @summary Create an Event work-alike object based on the provided dictionary.
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* The event should contain all of the same properties from the dict.
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*
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* @extends {Event}
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*/
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shaka.util.FakeEvent = class {
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/**
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* @param {string} type
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* @param {Object=} dict
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*/
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constructor(type, dict = {}) {
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// Take properties from dict if present.
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for (const key in dict) {
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Object.defineProperty(this, key, {
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value: dict[key],
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writable: true,
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enumerable: true,
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});
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}
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// The properties below cannot be set by the dict. They are all provided
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// for compatibility with native events.
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/** @const {boolean} */
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this.bubbles = false;
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/** @type {boolean} */
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this.cancelable = false;
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/** @type {boolean} */
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this.defaultPrevented = false;
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/**
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* According to MDN, Chrome uses high-res timers instead of epoch time.
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* Follow suit so that timeStamps on FakeEvents use the same base as
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* on native Events.
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* @const {number}
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* @see https://developer.mozilla.org/en-US/docs/Web/API/Event/timeStamp
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*/
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this.timeStamp = window.performance && window.performance.now ?
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window.performance.now() : Date.now();
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/** @const {string} */
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this.type = type;
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/** @const {boolean} */
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this.isTrusted = false;
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/** @type {EventTarget} */
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this.currentTarget = null;
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/** @type {EventTarget} */
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this.target = null;
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/**
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* Non-standard property read by FakeEventTarget to stop processing
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* listeners.
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* @type {boolean}
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*/
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this.stopped = false;
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}
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/**
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* Prevents the default action of the event. Has no effect if the event isn't
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* cancellable.
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* @override
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*/
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preventDefault() {
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if (this.cancelable) {
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this.defaultPrevented = true;
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}
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}
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/**
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* Stops processing event listeners for this event. Provided for
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* compatibility with native Events.
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* @override
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*/
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stopImmediatePropagation() {
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this.stopped = true;
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}
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/**
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* Does nothing, since FakeEvents do not bubble. Provided for compatibility
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* with native Events.
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* @override
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*/
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stopPropagation() {}
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};
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