/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.ui.ChapterSelection');
goog.require('shaka.ui.Controls');
goog.require('shaka.ui.Enums');
goog.require('shaka.ui.Locales');
goog.require('shaka.ui.Localization');
goog.require('shaka.ui.OverflowMenu');
goog.require('shaka.ui.SettingsMenu');
goog.require('shaka.ui.Utils');
goog.require('shaka.util.Dom');
goog.requireType('shaka.ui.Controls');
/**
* @extends {shaka.ui.SettingsMenu}
* @final
* @export
*/
shaka.ui.ChapterSelection = class extends shaka.ui.SettingsMenu {
/**
* @param {!HTMLElement} parent
* @param {!shaka.ui.Controls} controls
*/
constructor(parent, controls) {
super(parent, controls, shaka.ui.Enums.MaterialDesignIcons.CHAPTER);
this.button.classList.add('shaka-chapter-button');
this.menu.classList.add('shaka-chapters');
this.button.classList.add('shaka-tooltip-status');
/** @type {!Array<shaka.extern.Chapter>} */
this.chapters_ = [];
this.chaptersLanguage_ = 'und';
this.eventManager.listen(
this.localization, shaka.ui.Localization.LOCALE_UPDATED, () => {
this.updateLocalizedStrings_();
this.updateChapters_();
});
this.eventManager.listen(
this.localization, shaka.ui.Localization.LOCALE_CHANGED, () => {
this.updateLocalizedStrings_();
this.updateChapters_();
});
this.eventManager.listen(this.player, 'unloading', () => {
this.deletePreviousChapters_();
this.chaptersLanguage_ = 'und';
this.chapters_ = [];
});
this.eventManager.listen(this.player, 'trackschanged', () => {
this.updateChapters_();
});
// Set up all the strings in the user's preferred language.
this.updateLocalizedStrings_();
this.updateChapters_();
}
/**
* @private
*/
updateLocalizedStrings_() {
const LocIds = shaka.ui.Locales.Ids;
this.backButton.ariaLabel = this.localization.resolve(LocIds.BACK);
this.button.ariaLabel = this.localization.resolve(LocIds.CHAPTERS);
this.nameSpan.textContent = this.localization.resolve(LocIds.CHAPTERS);
this.backSpan.textContent = this.localization.resolve(LocIds.CHAPTERS);
}
/**
* @private
*/
deletePreviousChapters_() {
// 1. Save the back to menu button
const backButton = shaka.ui.Utils.getFirstDescendantWithClassName(
this.menu, 'shaka-back-to-overflow-button');
// 2. Remove everything
shaka.util.Dom.removeAllChildren(this.menu);
// 3. Add the backTo Menu button back
this.menu.appendChild(backButton);
// 4. Hidden button
shaka.ui.Utils.setDisplay(this.button, false);
}
/**
* @private
*/
updateChapters_() {
/**
* Does a value compare on chapters.
* @param {shaka.extern.Chapter} a
* @param {shaka.extern.Chapter} b
* @return {boolean}
*/
const chaptersEqual = (a, b) => {
return (!a && !b) || (a.id === b.id && a.title === b.title &&
a.startTime === b.startTime && a.endTime === b.endTime);
};
let nextLanguage = 'und';
/** @type {!Array<shaka.extern.Chapter>} */
let nextChapters = [];
const currentLocales = this.localization.getCurrentLocales();
for (const locale of Array.from(currentLocales)) {
nextLanguage = locale;
nextChapters = this.player.getChapters(nextLanguage);
if (nextChapters.length) {
break;
}
}
if (!nextChapters.length) {
nextLanguage = 'und';
nextChapters = this.player.getChapters(nextLanguage);
}
const languageChanged = nextLanguage !== this.chaptersLanguage_;
const chaptersChanged = this.chapters_.length !== nextChapters.length ||
!this.chapters_.some((c, idx) => {
const n = nextChapters.at(idx);
return chaptersEqual(c, n) ||
nextChapters.some((n) => chaptersEqual(c, n));
});
this.chaptersLanguage_ = nextLanguage;
this.chapters_ = nextChapters;
if (!nextChapters.length) {
this.deletePreviousChapters_();
} else if (languageChanged || chaptersChanged) {
for (const chapter of this.chapters_) {
const button = shaka.util.Dom.createButton();
const span = shaka.util.Dom.createHTMLElement('span');
span.classList.add('shaka-chapter');
span.textContent = chapter.title;
button.appendChild(span);
this.eventManager.listen(button, 'click', () => {
this.video.currentTime = chapter.startTime;
});
this.menu.appendChild(button);
}
shaka.ui.Utils.setDisplay(this.button, true);
shaka.ui.Utils.focusOnTheChosenItem(this.menu);
}
}
};
/**
* @implements {shaka.extern.IUIElement.Factory}
* @final
*/
shaka.ui.ChapterSelection.Factory = class {
/** @override */
create(rootElement, controls) {
return new shaka.ui.ChapterSelection(rootElement, controls);
}
};
shaka.ui.OverflowMenu.registerElement(
'chapter', new shaka.ui.ChapterSelection.Factory());
shaka.ui.Controls.registerElement(
'chapter', new shaka.ui.ChapterSelection.Factory());