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, 'loading', () => {
  50.       this.onAudioTracksChanged_();
  51.     });
  53.     this.eventManager.listen(this.player, 'audiotrackschanged', () => {
  54.       this.onAudioTracksChanged_();
  55.     });
  57.     // Set up all the strings in the user's preferred language.
  58.     this.updateLocalizedStrings_();
  60.     this.onAudioTracksChanged_();
  61.   }
  64.   /** @private */
  65.   onAudioTracksChanged_() {
  66.     const audioTracks = this.player.getAudioTracks();
  68.     shaka.ui.LanguageUtils.updateAudioTracks(audioTracks, 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.         this.controls.getConfig().showAudioCodec);
  74.     shaka.ui.Utils.focusOnTheChosenItem(this.menu);
  76.     this.controls.dispatchEvent(
  77.         new shaka.util.FakeEvent('languageselectionupdated'));
  79.     this.button.setAttribute('shaka-status', this.currentSelection.innerText);
  81.     const numberOfItems = this.menu.getElementsByTagName('button').length;
  82.     shaka.ui.Utils.setDisplay(this.button, numberOfItems > 2);
  83.   }
  85.   /**
  86.    * @param {!shaka.extern.AudioTrack} audioTrack
  87.    * @private
  88.    */
  89.   onAudioTrackSelected_(audioTrack) {
  90.     this.player.selectAudioTrack(audioTrack);
  91.   }
  94.   /**
  95.    * @private
  96.    */
  97.   updateLocalizedStrings_() {
  98.     const LocIds = shaka.ui.Locales.Ids;
  100.     this.backButton.ariaLabel = this.localization.resolve(LocIds.BACK);
  101.     this.button.ariaLabel = this.localization.resolve(LocIds.LANGUAGE);
  102.     this.nameSpan.textContent =
  103.         this.localization.resolve(LocIds.LANGUAGE);
  104.     this.backSpan.textContent =
  105.         this.localization.resolve(LocIds.LANGUAGE);
  106.   }
  107. };
  110. /**
  111.  * @implements {shaka.extern.IUIElement.Factory}
  112.  * @final
  113.  */
  114. shaka.ui.AudioLanguageSelection.Factory = class {
  115.   /** @override */
  116.   create(rootElement, controls) {
  117.     return new shaka.ui.AudioLanguageSelection(rootElement, controls);
  118.   }
  119. };
  121. shaka.ui.OverflowMenu.registerElement(
  122.     'language', new shaka.ui.AudioLanguageSelection.Factory());
  124. shaka.ui.Controls.registerElement(
  125.     'language', new shaka.ui.AudioLanguageSelection.Factory());