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.  * @export
  20.  */
  21. shaka.ui.PlayButton = class extends shaka.ui.Element {
  22.   /**
  23.    * @param {!HTMLElement} parent
  24.    * @param {!shaka.ui.Controls} controls
  25.    */
  26.   constructor(parent, controls) {
  27.     super(parent, controls);
  29.     const AdManager = shaka.ads.AdManager;
  31.     /** @protected {!HTMLButtonElement} */
  32.     this.button = shaka.util.Dom.createButton();
  33.     this.parent.appendChild(this.button);
  35.     const LOCALE_UPDATED = shaka.ui.Localization.LOCALE_UPDATED;
  36.     this.eventManager.listen(this.localization, LOCALE_UPDATED, () => {
  37.       this.updateAriaLabel();
  38.     });
  40.     const LOCALE_CHANGED = shaka.ui.Localization.LOCALE_CHANGED;
  41.     this.eventManager.listen(this.localization, LOCALE_CHANGED, () => {
  42.       this.updateAriaLabel();
  43.     });
  45.     this.eventManager.listen(this.video, 'play', () => {
  46.       this.updateAriaLabel();
  47.       this.updateIcon();
  48.     });
  50.     this.eventManager.listen(this.video, 'pause', () => {
  51.       this.updateAriaLabel();
  52.       this.updateIcon();
  53.     });
  55.     this.eventManager.listen(this.video, 'seeking', () => {
  56.       this.updateAriaLabel();
  57.       this.updateIcon();
  58.     });
  60.     this.eventManager.listen(this.adManager, AdManager.AD_PAUSED, () => {
  61.       this.updateAriaLabel();
  62.       this.updateIcon();
  63.     });
  65.     this.eventManager.listen(this.adManager, AdManager.AD_RESUMED, () => {
  66.       this.updateAriaLabel();
  67.       this.updateIcon();
  68.     });
  70.     this.eventManager.listen(this.adManager, AdManager.AD_STARTED, () => {
  71.       this.updateAriaLabel();
  72.       this.updateIcon();
  73.     });
  75.     this.eventManager.listen(this.button, 'click', () => {
  76.       if (this.ad && this.ad.isLinear()) {
  77.         this.controls.playPauseAd();
  78.       } else {
  79.         this.controls.playPausePresentation();
  80.       }
  81.     });
  83.     if (this.ad) {
  84.       // There was already an ad.
  85.       this.updateAriaLabel();
  86.       this.updateIcon();
  87.     }
  88.   }
  90.   /**
  91.    * @return {boolean}
  92.    * @protected
  93.    */
  94.   isPaused() {
  95.     if (this.ad && this.ad.isLinear()) {
  96.       return this.ad.isPaused();
  97.     }
  99.     return this.controls.presentationIsPaused();
  100.   }
  102.   /**
  103.    * Called when the button's aria label needs to change.
  104.    * To be overridden by subclasses.
  105.    */
  106.   updateAriaLabel() {}
  108.   /**
  109.    * Called when the button's icon needs to change.
  110.    * To be overridden by subclasses.
  111.    */
  112.   updateIcon() {}
  113. };