Source: ui/play_button.js

  1. /*! @license
  2.  * Shaka Player
  3.  * Copyright 2016 Google LLC
  4.  * SPDX-License-Identifier: Apache-2.0
  5.  */
  8. goog.provide('shaka.ui.PlayButton');
  10. goog.require('shaka.ads.AdManager');
  11. goog.require('shaka.ui.Element');
  12. goog.require('shaka.ui.Localization');
  13. goog.require('shaka.util.Dom');
  14. goog.requireType('shaka.ui.Controls');
  17. /**
  18.  * @extends {shaka.ui.Element}
  19.  * @implements {shaka.extern.IUIPlayButton}
  20.  * @export
  21.  */
  22. shaka.ui.PlayButton = class extends shaka.ui.Element {
  23.   /**
  24.    * @param {!HTMLElement} parent
  25.    * @param {!shaka.ui.Controls} controls
  26.    */
  27.   constructor(parent, controls) {
  28.     super(parent, controls);
  30.     const AdManager = shaka.ads.AdManager;
  32.     /** @protected {!HTMLButtonElement} */
  33.     this.button = shaka.util.Dom.createButton();
  34.     this.parent.appendChild(this.button);
  36.     const LOCALE_UPDATED = shaka.ui.Localization.LOCALE_UPDATED;
  37.     this.eventManager.listen(this.localization, LOCALE_UPDATED, () => {
  38.       this.updateAriaLabel();
  39.     });
  41.     const LOCALE_CHANGED = shaka.ui.Localization.LOCALE_CHANGED;
  42.     this.eventManager.listen(this.localization, LOCALE_CHANGED, () => {
  43.       this.updateAriaLabel();
  44.     });
  46.     this.eventManager.listen(this.video, 'play', () => {
  47.       this.updateAriaLabel();
  48.       this.updateIcon();
  49.     });
  51.     this.eventManager.listen(this.video, 'pause', () => {
  52.       this.updateAriaLabel();
  53.       this.updateIcon();
  54.     });
  56.     this.eventManager.listen(this.video, 'seeking', () => {
  57.       this.updateAriaLabel();
  58.       this.updateIcon();
  59.     });
  61.     this.eventManager.listen(this.adManager, AdManager.AD_PAUSED, () => {
  62.       this.updateAriaLabel();
  63.       this.updateIcon();
  64.     });
  66.     this.eventManager.listen(this.adManager, AdManager.AD_RESUMED, () => {
  67.       this.updateAriaLabel();
  68.       this.updateIcon();
  69.     });
  71.     this.eventManager.listen(this.adManager, AdManager.AD_STARTED, () => {
  72.       this.updateAriaLabel();
  73.       this.updateIcon();
  74.     });
  76.     this.eventManager.listen(this.adManager, AdManager.AD_STOPPED, () => {
  77.       this.updateAriaLabel();
  78.       this.updateIcon();
  79.     });
  81.     this.eventManager.listen(this.button, 'click', () => {
  82.       if (this.ad && this.ad.isLinear()) {
  83.         this.controls.playPauseAd();
  84.       } else {
  85.         this.controls.playPausePresentation();
  86.       }
  87.     });
  89.     if (this.ad) {
  90.       // There was already an ad.
  91.       this.updateAriaLabel();
  92.       this.updateIcon();
  93.     }
  94.   }
  96.   /**
  97.    * @return {boolean}
  98.    * @protected
  99.    * @override
  100.    */
  101.   isPaused() {
  102.     if (this.ad && this.ad.isLinear()) {
  103.       return this.ad.isPaused();
  104.     }
  106.     return this.controls.presentationIsPaused();
  107.   }
  109.   /**
  110.    * @return {boolean}
  111.    * @protected
  112.    * @override
  113.    */
  114.   isEnded() {
  115.     if (this.ad && this.ad.isLinear()) {
  116.       return false;
  117.     }
  119.     return this.video.ended;
  120.   }
  122.   /**
  123.    * Called when the button's aria label needs to change.
  124.    * To be overridden by subclasses.
  125.    */
  126.   updateAriaLabel() {}
  128.   /**
  129.    * Called when the button's icon needs to change.
  130.    * To be overridden by subclasses.
  131.    */
  132.   updateIcon() {}
  133. };