Update to reveal.js 4.6.1
Change-Id: I566737c50b93dd8c094ad3c3fa59865260b3b4ba
diff --git a/inst/reveal.js-4.6.1/js/controllers/notes.js b/inst/reveal.js-4.6.1/js/controllers/notes.js
new file mode 100644
index 0000000..7256425
--- /dev/null
+++ b/inst/reveal.js-4.6.1/js/controllers/notes.js
@@ -0,0 +1,120 @@
+/**
+ * Handles the showing of speaker notes
+ */
+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() || '<span class="notes-placeholder">No notes on this slide.</span>';
+
+ }
+
+ }
+
+ /**
+ * 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.print.isPrintingPDF() ) {
+ 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}
+ */
+ isSpeakerNotesWindow() {
+
+ 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 <section>
+ * 2. With <aside class="notes"> elements inside the slide
+ *
+ * @param {HTMLElement} [slide=currentSlide]
+ * @return {(string|null)}
+ */
+ getSlideNotes( slide = this.Reveal.getCurrentSlide() ) {
+
+ // Notes can be specified via the data-notes attribute...
+ if( slide.hasAttribute( 'data-notes' ) ) {
+ return slide.getAttribute( 'data-notes' );
+ }
+
+ // ... or using <aside class="notes"> elements
+ let notesElements = slide.querySelectorAll( 'aside.notes' );
+ if( notesElements ) {
+ return Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\n' );
+ }
+
+ return null;
+
+ }
+
+ destroy() {
+
+ this.element.remove();
+
+ }
+
+}
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