new controller for speaker notes

js/components/playback.js

@@ -1,6 +1,6 @@
 /**
- * Constructor for the playback component, which displays
- * play/pause/progress controls.
+ * UI component that lets the user control pause/resume
+ * and see the progress of auto-slide playback.
  *
  * @param {HTMLElement} container The component will append
  * itself to this

js/controllers/fragments.js

@@ -13,6 +13,20 @@ export default class Fragments {
 
 	}
 
+	/**
+	 * Called whenever the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.fragments === false ) {
+			this.disable();
+		}
+		else if( oldConfig.fragments === false ) {
+			this.enable();
+		}
+
+	}
+
 	/**
 	 * If fragments are disabled in the deck, they should all be
 	 * visible rather than stepped through.

js/controllers/keyboard.js

@@ -21,6 +21,32 @@ export default class Keyboard {
 
 	}
 
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.navigationMode === 'linear' ) {
+			this.shortcuts['→  ,  ↓  ,  SPACE  ,  N  ,  L  ,  J'] = 'Next slide';
+			this.shortcuts['←  ,  ↑  ,  P  ,  H  ,  K']           = 'Previous slide';
+		}
+		else {
+			this.shortcuts['N  ,  SPACE']   = 'Next slide';
+			this.shortcuts['P']             = 'Previous slide';
+			this.shortcuts['←  ,  H'] = 'Navigate left';
+			this.shortcuts['→  ,  L'] = 'Navigate right';
+			this.shortcuts['↑  ,  K'] = 'Navigate up';
+			this.shortcuts['↓  ,  J'] = 'Navigate down';
+		}
+
+		this.shortcuts['Home  ,  Shift ←']        = 'First slide';
+		this.shortcuts['End  ,  Shift →']         = 'Last slide';
+		this.shortcuts['B  ,  .']                       = 'Pause';
+		this.shortcuts['F']                             = 'Fullscreen';
+		this.shortcuts['ESC, O']                        = 'Slide overview';
+
+	}
+
 	/**
 	 * Starts listening for keyboard events.
 	 */
@@ -73,32 +99,6 @@ export default class Keyboard {
 
 	}
 
-	/**
-	 * Updates our keyboard shortcuts based on current settings.
-	 */
-	refreshSortcuts() {
-
-		if( this.Reveal.getConfig().navigationMode === 'linear' ) {
-			this.shortcuts['→  ,  ↓  ,  SPACE  ,  N  ,  L  ,  J'] = 'Next slide';
-			this.shortcuts['←  ,  ↑  ,  P  ,  H  ,  K']           = 'Previous slide';
-		}
-		else {
-			this.shortcuts['N  ,  SPACE']   = 'Next slide';
-			this.shortcuts['P']             = 'Previous slide';
-			this.shortcuts['←  ,  H'] = 'Navigate left';
-			this.shortcuts['→  ,  L'] = 'Navigate right';
-			this.shortcuts['↑  ,  K'] = 'Navigate up';
-			this.shortcuts['↓  ,  J'] = 'Navigate down';
-		}
-
-		this.shortcuts['Home  ,  Shift ←']        = 'First slide';
-		this.shortcuts['End  ,  Shift →']         = 'Last slide';
-		this.shortcuts['B  ,  .']                       = 'Pause';
-		this.shortcuts['F']                             = 'Fullscreen';
-		this.shortcuts['ESC, O']                        = 'Slide overview';
-
-	}
-
 	/**
 	 * Programmatically triggers a keyboard event
 	 *

js/controllers/notes.js

@@ -0,0 +1,116 @@
+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() || '<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.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 <section>
+	 * 2. As an <aside class="notes"> inside of 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 an <aside class="notes"> element
+		let notesElement = slide.querySelector( 'aside.notes' );
+		if( notesElement ) {
+			return notesElement.innerHTML;
+		}
+
+		return null;
+
+	}
+
+}

js/controllers/slidenumber.js

@@ -9,7 +9,7 @@ export default class SlideNumber {
 
 	}
 
-	createElement() {
+	render() {
 
 		this.element = document.createElement( 'div' );
 		this.element.className = 'slide-number';
@@ -18,12 +18,9 @@ export default class SlideNumber {
 	}
 
 	/**
-	 * Shows or hides the slide number depending on the
-	 * current config and state.
+	 * Called when the reveal.js config is updated.
 	 */
-	refreshVisibility() {
-
-		let config = this.Reveal.getConfig();
+	configure( config, oldConfig ) {
 
 		let slideNumberDisplay = 'none';
 		if( config.slideNumber && !this.Reveal.isPrintingPDF() ) {

js/reveal.js

@@ -9,6 +9,7 @@ import Location from './controllers/location.js'
 import Plugins from './controllers/plugins.js'
 import Print from './controllers/print.js'
 import Touch from './controllers/touch.js'
+import Notes from './controllers/notes.js'
 import Playback from './components/playback.js'
 import defaultConfig from './config.js'
 import { isMobile, isChrome, isAndroid, supportsZoom } from './utils/device.js'
@@ -82,6 +83,7 @@ export default function( revealElement, options ) {
 		plugins = new Plugins( Reveal ),
 		print = new Print( Reveal ),
 		touch = new Touch( Reveal ),
+		notes = new Notes( Reveal ),
 
 		// CSS transform that is currently applied to the slides container,
 		// split into two groups
@@ -236,12 +238,10 @@ export default function( revealElement, options ) {
 			<button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>` );
 
 		// Slide number
-		slideNumber.createElement();
+		slideNumber.render();
 
-		// Element containing notes that are visible to the audience
-		dom.speakerNotes = createSingletonNode( dom.wrapper, 'div', 'speaker-notes', null );
-		dom.speakerNotes.setAttribute( 'data-prevent-swipe', '' );
-		dom.speakerNotes.setAttribute( 'tabindex', '0' );
+		// Slide notes
+		notes.render();
 
 		// Overlay graphic which is displayed during the paused mode
 		dom.pauseOverlay = createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class="resume-button">Resume presentation</button>' : null );
@@ -452,10 +452,6 @@ export default function( revealElement, options ) {
 			resume();
 		}
 
-		if( config.showNotes ) {
-			dom.speakerNotes.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
-		}
-
 		if( config.mouseWheel ) {
 			document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
 			document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
@@ -506,14 +502,6 @@ export default function( revealElement, options ) {
 			autoSlidePaused = false;
 		}
 
-		// Update the state of our fragments
-		if( config.fragments === false ) {
-			fragments.disable();
-		}
-		else if( oldConfig.fragments === false ) {
-			fragments.enable();
-		}
-
 		// Add the navigation mode to the DOM so we can adjust styling
 		if( config.navigationMode !== 'default' ) {
 			dom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );
@@ -522,8 +510,10 @@ export default function( revealElement, options ) {
 			dom.wrapper.removeAttribute( 'data-navigation-mode' );
 		}
 
-		slideNumber.refreshVisibility();
-		keyboard.refreshSortcuts();
+		notes.configure( config, oldConfig );
+		fragments.configure( config, oldConfig );
+		slideNumber.configure( config, oldConfig );
+		keyboard.configure( config, oldConfig );
 
 		sync();
 
@@ -1409,11 +1399,10 @@ export default function( revealElement, options ) {
 
 		updateControls();
 		updateProgress();
-		updateNotes();
 
+		notes.update();
 		backgrounds.update();
 		backgrounds.updateParallax();
-
 		slideNumber.update();
 		fragments.update();
 
@@ -1475,9 +1464,9 @@ export default function( revealElement, options ) {
 		updateControls();
 		updateProgress();
 		updateSlidesVisibility();
-		updateNotesVisibility();
-		updateNotes();
 
+		notes.update();
+		notes.updateVisibility();
 		backgrounds.update( true );
 		slideNumber.update();
 		slideContent.formatEmbeddedContent();
@@ -1514,7 +1503,7 @@ export default function( revealElement, options ) {
 		slideContent.load( slide );
 
 		backgrounds.update();
-		updateNotes();
+		notes.update();
 
 	}
 
@@ -1767,49 +1756,6 @@ export default function( revealElement, options ) {
 
 	}
 
-	/**
-	 * Pick up notes from the current slide and display them
-	 * to the viewer.
-	 *
-	 * @see {@link config.showNotes}
-	 */
-	function updateNotes() {
-
-		if( config.showNotes && dom.speakerNotes && currentSlide && !print.isPrintingPDF() ) {
-
-			dom.speakerNotes.innerHTML = 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.
-	 */
-	function updateNotesVisibility() {
-
-		if( config.showNotes && hasNotes() ) {
-			dom.wrapper.classList.add( 'show-notes' );
-		}
-		else {
-			dom.wrapper.classList.remove( 'show-notes' );
-		}
-
-	}
-
-	/**
-	 * Checks if there are speaker notes for ANY slide in the
-	 * presentation.
-	 */
-	function hasNotes() {
-
-		return dom.slides.querySelectorAll( '[data-notes], aside.notes' ).length > 0;
-
-	}
-
 	/**
 	 * Updates the progress bar to reflect the current slide.
 	 */
@@ -2036,18 +1982,6 @@ export default function( revealElement, options ) {
 
 	}
 
-	/**
-	 * Checks if this presentation is running inside of the
-	 * speaker notes window.
-	 *
-	 * @return {boolean}
-	 */
-	function isSpeakerNotes() {
-
-		return !!window.location.search.match( /receiver/gi );
-
-	}
-
 	/**
 	 * Retrieves the h/v location and fragment of the current,
 	 * or specified, slide.
@@ -2227,32 +2161,6 @@ export default function( revealElement, options ) {
 
 	}
 
-	/**
-	 * 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. As an <aside class="notes"> inside of the slide
-	 *
-	 * @param {HTMLElement} [slide=currentSlide]
-	 * @return {(string|null)}
-	 */
-	function getSlideNotes( slide = currentSlide ) {
-
-		// Notes can be specified via the data-notes attribute...
-		if( slide.hasAttribute( 'data-notes' ) ) {
-			return slide.getAttribute( 'data-notes' );
-		}
-
-		// ... or using an <aside class="notes"> element
-		let notesElement = slide.querySelector( 'aside.notes' );
-		if( notesElement ) {
-			return notesElement.innerHTML;
-		}
-
-		return null;
-
-	}
-
 	/**
 	 * Retrieves the current state of the presentation as
 	 * an object. This state can then be restored at any
@@ -2789,7 +2697,7 @@ export default function( revealElement, options ) {
 		// State checks
 		isPaused,
 		isAutoSliding,
-		isSpeakerNotes,
+		isSpeakerNotes: notes.isSpeakerNotes.bind( notes ),
 		isOverview: overview.isActive.bind( overview ),
 		isPrintingPDF: print.isPrintingPDF.bind( print ),
 
@@ -2832,7 +2740,7 @@ export default function( revealElement, options ) {
 		getSlideBackground,
 
 		// Returns the speaker notes string for a slide, or null
-		getSlideNotes,
+		getSlideNotes: notes.getSlideNotes.bind( notes ),
 
 		// Returns an array with all horizontal/vertical slides in the deck
 		getHorizontalSlides,
@@ -2876,7 +2784,7 @@ export default function( revealElement, options ) {
 		// Helper method, retrieves query string as a key:value map
 		getQueryHash,
 
-		// Returns the top-level DOM element
+		// Returns reveal.js DOM elements
 		getRevealElement: () => dom.wrapper || document.querySelector( '.reveal' ),
 		getSlidesElement: () => dom.slides,
 		getBackgroundsElement: () => dom.background,
@@ -2892,6 +2800,7 @@ export default function( revealElement, options ) {
 		announceStatus,
 		getStatusText,
 
+		print,
 		location,
 		overview,
 		fragments,