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.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.     /** @protected {!HTMLButtonElement} */
  31.     this.button = shaka.util.Dom.createButton();
  32.     this.parent.appendChild(this.button);
  34.     const LOCALE_UPDATED = shaka.ui.Localization.LOCALE_UPDATED;
  35.     this.eventManager.listen(this.localization, LOCALE_UPDATED, () => {
  36.       this.updateAriaLabel();
  37.     });
  39.     const LOCALE_CHANGED = shaka.ui.Localization.LOCALE_CHANGED;
  40.     this.eventManager.listen(this.localization, LOCALE_CHANGED, () => {
  41.       this.updateAriaLabel();
  42.     });
  44.     this.eventManager.listen(this.video, 'play', () => {
  45.       this.updateAriaLabel();
  46.       this.updateIcon();
  47.     });
  49.     this.eventManager.listen(this.video, 'pause', () => {
  50.       this.updateAriaLabel();
  51.       this.updateIcon();
  52.     });
  54.     this.eventManager.listen(this.video, 'seeking', () => {
  55.       this.updateAriaLabel();
  56.       this.updateIcon();
  57.     });
  59.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_PAUSED, () => {
  60.       this.updateAriaLabel();
  61.       this.updateIcon();
  62.     });
  64.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_RESUMED, () => {
  65.       this.updateAriaLabel();
  66.       this.updateIcon();
  67.     });
  69.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_STARTED, () => {
  70.       this.updateAriaLabel();
  71.       this.updateIcon();
  72.     });
  74.     this.eventManager.listen(this.adManager, shaka.ads.Utils.AD_STOPPED, () => {
  75.       this.updateAriaLabel();
  76.       this.updateIcon();
  77.     });
  79.     this.eventManager.listen(this.button, 'click', () => {
  80.       if (!this.controls.isOpaque()) {
  81.         return;
  82.       }
  83.       this.controls.playPausePresentation();
  84.     });
  86.     if (this.ad) {
  87.       // There was already an ad.
  88.       this.updateAriaLabel();
  89.       this.updateIcon();
  90.     }
  91.   }
  93.   /**
  94.    * @return {boolean}
  95.    * @protected
  96.    * @override
  97.    */
  98.   isPaused() {
  99.     if (this.ad && this.ad.isLinear()) {
  100.       return this.ad.isPaused();
  101.     }
  103.     return this.controls.presentationIsPaused();
  104.   }
  106.   /**
  107.    * @return {boolean}
  108.    * @protected
  109.    * @override
  110.    */
  111.   isEnded() {
  112.     if (this.ad && this.ad.isLinear()) {
  113.       return false;
  114.     }
  116.     return this.player ? this.player.isEnded() : true;
  117.   }
  119.   /**
  120.    * Called when the button's aria label needs to change.
  121.    * To be overridden by subclasses.
  122.    */
  123.   updateAriaLabel() {}
  125.   /**
  126.    * Called when the button's icon needs to change.
  127.    * To be overridden by subclasses.
  128.    */
  129.   updateIcon() {}
  130. };