Merge pull request #3942 from MinecraftPlaye/book-darktheme

Add epubjs theme support to the book player

src/plugins/bookPlayer/plugin.js

@@ -9,6 +9,7 @@ import Screenfull from 'screenfull';
 import TableOfContents from './tableOfContents';
 import dom from '../../scripts/dom';
 import { translateHtml } from '../../scripts/globalize';
+import * as userSettings from '../../scripts/settings/userSettings';
 
 import '../../elements/emby-button/paper-icon-button-light';
 
@@ -294,6 +295,12 @@ export class BookPlayer {
                 this.currentSrc = downloadHref;
                 this.rendition = rendition;
 
+                rendition.themes.register('dark', { 'body': { 'color': '#fff' } });
+
+                if (userSettings.theme(undefined) === 'dark' || userSettings.theme(undefined) === null) {
+                    rendition.themes.select('dark');
+                }
+
                 return rendition.display().then(() => {
                     const epubElem = document.querySelector('.epub-container');
                     epubElem.style.opacity = '0';