Source: ui/audio_language_selection.js

  1. /*! @license
  2.  * Shaka Player
  3.  * Copyright 2016 Google LLC
  4.  * SPDX-License-Identifier: Apache-2.0
  5.  */
  8. goog.provide('shaka.ui.AudioLanguageSelection');
  10. goog.require('shaka.ui.Controls');
  11. goog.require('shaka.ui.Enums');
  12. goog.require('shaka.ui.LanguageUtils');
  13. goog.require('shaka.ui.Locales');
  14. goog.require('shaka.ui.Localization');
  15. goog.require('shaka.ui.OverflowMenu');
  16. goog.require('shaka.ui.SettingsMenu');
  17. goog.require('shaka.ui.Utils');
  18. goog.require('shaka.util.FakeEvent');
  19. goog.requireType('shaka.ui.Controls');
  21. /**
  22.  * @extends {shaka.ui.SettingsMenu}
  23.  * @final
  24.  * @export
  25.  */
  26. shaka.ui.AudioLanguageSelection = class extends shaka.ui.SettingsMenu {
  27.   /**
  28.    * @param {!HTMLElement} parent
  29.    * @param {!shaka.ui.Controls} controls
  30.    */
  31.   constructor(parent, controls) {
  32.     super(parent, controls, shaka.ui.Enums.MaterialDesignIcons.LANGUAGE);
  34.     this.button.classList.add('shaka-language-button');
  35.     this.button.classList.add('shaka-tooltip-status');
  36.     this.menu.classList.add('shaka-audio-languages');
  38.     this.eventManager.listen(
  39.         this.localization, shaka.ui.Localization.LOCALE_UPDATED, () => {
  40.           this.updateLocalizedStrings_();
  41.         });
  43.     this.eventManager.listen(
  44.         this.localization, shaka.ui.Localization.LOCALE_CHANGED, () => {
  45.           this.updateLocalizedStrings_();
  46.         });
  49.     this.eventManager.listen(this.player, 'trackschanged', () => {
  50.       this.onTracksChanged_();
  51.     });
  53.     this.eventManager.listen(this.player, 'variantchanged', () => {
  54.       this.updateAudioLanguages_();
  55.     });
  57.     // Set up all the strings in the user's preferred language.
  58.     this.updateLocalizedStrings_();
  60.     this.updateAudioLanguages_();
  61.   }
  64.   /** @private */
  65.   updateAudioLanguages_() {
  66.     const tracks = this.player.getVariantTracks();
  68.     shaka.ui.LanguageUtils.updateTracks(tracks, this.menu,
  69.         (track) => this.onAudioTrackSelected_(track),
  70.         /* updateChosen= */ true, this.currentSelection, this.localization,
  71.         this.controls.getConfig().trackLabelFormat,
  72.         this.controls.getConfig().showAudioChannelCountVariants);
  73.     shaka.ui.Utils.focusOnTheChosenItem(this.menu);
  75.     this.controls.dispatchEvent(
  76.         new shaka.util.FakeEvent('languageselectionupdated'));
  78.     this.button.setAttribute('shaka-status', this.currentSelection.innerText);
  79.   }
  81.   /** @private */
  82.   onTracksChanged_() {
  83.     const hasVariants = this.player.getVariantTracks().length > 0;
  84.     shaka.ui.Utils.setDisplay(this.button, hasVariants);
  85.     this.updateAudioLanguages_();
  86.   }
  88.   /**
  89.    * @param {!shaka.extern.Track} track
  90.    * @private
  91.    */
  92.   onAudioTrackSelected_(track) {
  93.     if (track.channelsCount &&
  94.         this.controls.getConfig().showAudioChannelCountVariants) {
  95.       this.player.selectAudioLanguage(
  96.           track.language, track.roles[0], track.channelsCount);
  97.     } else {
  98.       this.player.selectAudioLanguage(track.language, track.roles[0]);
  99.     }
  100.   }
  103.   /**
  104.    * @private
  105.    */
  106.   updateLocalizedStrings_() {
  107.     const LocIds = shaka.ui.Locales.Ids;
  109.     this.backButton.ariaLabel = this.localization.resolve(LocIds.BACK);
  110.     this.button.ariaLabel = this.localization.resolve(LocIds.LANGUAGE);
  111.     this.nameSpan.textContent =
  112.         this.localization.resolve(LocIds.LANGUAGE);
  113.     this.backSpan.textContent =
  114.         this.localization.resolve(LocIds.LANGUAGE);
  115.   }
  116. };
  119. /**
  120.  * @implements {shaka.extern.IUIElement.Factory}
  121.  * @final
  122.  */
  123. shaka.ui.AudioLanguageSelection.Factory = class {
  124.   /** @override */
  125.   create(rootElement, controls) {
  126.     return new shaka.ui.AudioLanguageSelection(rootElement, controls);
  127.   }
  128. };
  130. shaka.ui.OverflowMenu.registerElement(
  131.     'language', new shaka.ui.AudioLanguageSelection.Factory());
  133. shaka.ui.Controls.registerElement(
  134.     'language', new shaka.ui.AudioLanguageSelection.Factory());