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.Utils');
  11. goog.require('shaka.ui.Element');
  12. goog.require('shaka.ui.Enums');
  13. goog.require('shaka.ui.Locales');
  14. goog.require('shaka.ui.Localization');
  15. goog.require('shaka.util.Dom');
  16. goog.requireType('shaka.ui.Controls');
  19. /**
  20.  * @extends {shaka.ui.Element}
  21.  * @implements {shaka.extern.IUIPlayButton}
  22.  * @export
  23.  */
  24. shaka.ui.PlayButton = class extends shaka.ui.Element {
  25.   /**
  26.    * @param {!HTMLElement} parent
  27.    * @param {!shaka.ui.Controls} controls
  28.    */
  29.   constructor(parent, controls) {
  30.     super(parent, controls);
  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.player, 'loaded', () => {
  62.       this.updateAriaLabel();
  63.       this.updateIcon();
  64.     });
  66.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_PAUSED, () => {
  67.       this.updateAriaLabel();
  68.       this.updateIcon();
  69.     });
  71.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_RESUMED, () => {
  72.       this.updateAriaLabel();
  73.       this.updateIcon();
  74.     });
  76.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_STARTED, () => {
  77.       this.updateAriaLabel();
  78.       this.updateIcon();
  79.     });
  81.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_STOPPED, () => {
  82.       this.updateAriaLabel();
  83.       this.updateIcon();
  84.     });
  86.     this.eventManager.listen(this.button, 'click', () => {
  87.       if (!this.controls.isOpaque()) {
  88.         return;
  89.       }
  90.       this.controls.playPausePresentation();
  91.     });
  93.     this.updateAriaLabel();
  94.     this.updateIcon();
  95.   }
  97.   /**
  98.    * @return {boolean}
  99.    * @protected
  100.    * @override
  101.    */
  102.   isPaused() {
  103.     if (this.ad && this.ad.isLinear()) {
  104.       return this.ad.isPaused();
  105.     }
  107.     return this.controls.presentationIsPaused();
  108.   }
  110.   /**
  111.    * @return {boolean}
  112.    * @protected
  113.    * @override
  114.    */
  115.   isEnded() {
  116.     if (this.ad && this.ad.isLinear()) {
  117.       return false;
  118.     }
  120.     return this.player ? this.player.isEnded() : true;
  121.   }
  123.   /**
  124.    * Called when the button's aria label needs to change.
  125.    * To be overridden by subclasses, if necessary
  126.    */
  127.   updateAriaLabel() {
  128.     const LocIds = shaka.ui.Locales.Ids;
  129.     if (this.isEnded() && this.video.duration) {
  130.       this.button.ariaLabel = this.localization.resolve(LocIds.REPLAY);
  131.     } else {
  132.       const label = this.isPaused() ? LocIds.PLAY : LocIds.PAUSE;
  133.       this.button.ariaLabel = this.localization.resolve(label);
  134.     }
  135.   }
  137.   /**
  138.    * Called when the button's icon needs to change.
  139.    * To be overridden by subclasses.
  140.    */
  141.   updateIcon() {
  142.     const Icons = shaka.ui.Enums.MaterialDesignIcons;
  143.     if (this.isEnded() && this.video.duration) {
  144.       this.button.textContent = Icons.REPLAY;
  145.     } else {
  146.       this.button.textContent = this.isPaused() ? Icons.PLAY : Icons.PAUSE;
  147.     }
  148.   }
  149. };