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.adManager, shaka.ads.Utils.AD_PAUSED, () => {
  62.       this.updateAriaLabel();
  63.       this.updateIcon();
  64.     });
  66.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_RESUMED, () => {
  67.       this.updateAriaLabel();
  68.       this.updateIcon();
  69.     });
  71.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_STARTED, () => {
  72.       this.updateAriaLabel();
  73.       this.updateIcon();
  74.     });
  76.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_STOPPED, () => {
  77.       this.updateAriaLabel();
  78.       this.updateIcon();
  79.     });
  81.     this.eventManager.listen(this.button, 'click', () => {
  82.       if (!this.controls.isOpaque()) {
  83.         return;
  84.       }
  85.       this.controls.playPausePresentation();
  86.     });
  88.     this.updateAriaLabel();
  89.     this.updateIcon();
  90.   }
  92.   /**
  93.    * @return {boolean}
  94.    * @protected
  95.    * @override
  96.    */
  97.   isPaused() {
  98.     if (this.ad && this.ad.isLinear()) {
  99.       return this.ad.isPaused();
  100.     }
  102.     return this.controls.presentationIsPaused();
  103.   }
  105.   /**
  106.    * @return {boolean}
  107.    * @protected
  108.    * @override
  109.    */
  110.   isEnded() {
  111.     if (this.ad && this.ad.isLinear()) {
  112.       return false;
  113.     }
  115.     return this.player ? this.player.isEnded() : true;
  116.   }
  118.   /**
  119.    * Called when the button's aria label needs to change.
  120.    * To be overridden by subclasses, if necessary
  121.    */
  122.   updateAriaLabel() {
  123.     const LocIds = shaka.ui.Locales.Ids;
  124.     if (this.isEnded()) {
  125.       this.button.ariaLabel = this.localization.resolve(LocIds.REPLAY);
  126.     } else {
  127.       const label = this.isPaused() ? LocIds.PLAY : LocIds.PAUSE;
  128.       this.button.ariaLabel = this.localization.resolve(label);
  129.     }
  130.   }
  132.   /**
  133.    * Called when the button's icon needs to change.
  134.    * To be overridden by subclasses.
  135.    */
  136.   updateIcon() {
  137.     const Icons = shaka.ui.Enums.MaterialDesignIcons;
  138.     if (this.isEnded()) {
  139.       this.button.textContent = Icons.REPLAY;
  140.     } else {
  141.       this.button.textContent = this.isPaused() ? Icons.PLAY : Icons.PAUSE;
  142.     }
  143.   }
  144. };