import { extend, toArray } from '../utils/util.js' /** * */ export default class Notes { constructor( Reveal ) { this.Reveal = Reveal; } render() { this.element = document.createElement( 'div' ); this.element.className = 'speaker-notes'; this.element.setAttribute( 'data-prevent-swipe', '' ); this.element.setAttribute( 'tabindex', '0' ); this.Reveal.getRevealElement().appendChild( this.element ); } /** * Called when the reveal.js config is updated. */ configure( config, oldConfig ) { if( config.showNotes ) { this.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' ); } } /** * Pick up notes from the current slide and display them * to the viewer. * * @see {@link config.showNotes} */ update() { if( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) { this.element.innerHTML = this.getSlideNotes() || 'No notes on this slide.'; } } /** * Updates the visibility of the speaker notes sidebar that * is used to share annotated slides. The notes sidebar is * only visible if showNotes is true and there are notes on * one or more slides in the deck. */ updateVisibility() { if( this.Reveal.getConfig().showNotes && this.hasNotes() ) { this.Reveal.getRevealElement().classList.add( 'show-notes' ); } else { this.Reveal.getRevealElement().classList.remove( 'show-notes' ); } } /** * Checks if there are speaker notes for ANY slide in the * presentation. */ hasNotes() { return this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0; } /** * Checks if this presentation is running inside of the * speaker notes window. * * @return {boolean} */ isSpeakerNotes() { return !!window.location.search.match( /receiver/gi ); } /** * Retrieves the speaker notes from a slide. Notes can be * defined in two ways: * 1. As a data-notes attribute on the slide
* 2. As an