Use 16:9 aspect and bump reveal.js to 5.1.0
Change-Id: I6384639329daef18a40ca55cbd3c4eab0ae500e1
diff --git a/inst/reveal.js-5.1.0/js/controllers/autoanimate.js b/inst/reveal.js-5.1.0/js/controllers/autoanimate.js
new file mode 100644
index 0000000..5da88fa
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/autoanimate.js
@@ -0,0 +1,643 @@
+import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js'
+import { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'
+
+// Counter used to generate unique IDs for auto-animated elements
+let autoAnimateCounter = 0;
+
+/**
+ * Automatically animates matching elements across
+ * slides with the [data-auto-animate] attribute.
+ */
+export default class AutoAnimate {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ }
+
+ /**
+ * Runs an auto-animation between the given slides.
+ *
+ * @param {HTMLElement} fromSlide
+ * @param {HTMLElement} toSlide
+ */
+ run( fromSlide, toSlide ) {
+
+ // Clean up after prior animations
+ this.reset();
+
+ let allSlides = this.Reveal.getSlides();
+ let toSlideIndex = allSlides.indexOf( toSlide );
+ let fromSlideIndex = allSlides.indexOf( fromSlide );
+
+ // Ensure that;
+ // 1. Both slides exist.
+ // 2. Both slides are auto-animate targets with the same
+ // data-auto-animate-id value (including null if absent on both).
+ // 3. data-auto-animate-restart isn't set on the physically latter
+ // slide (independent of slide direction).
+ if( fromSlide && toSlide && fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )
+ && fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' )
+ && !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {
+
+ // Create a new auto-animate sheet
+ this.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();
+
+ let animationOptions = this.getAutoAnimateOptions( toSlide );
+
+ // Set our starting state
+ fromSlide.dataset.autoAnimate = 'pending';
+ toSlide.dataset.autoAnimate = 'pending';
+
+ // Flag the navigation direction, needed for fragment buildup
+ animationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward';
+
+ // If the from-slide is hidden because it has moved outside
+ // the view distance, we need to temporarily show it while
+ // measuring
+ let fromSlideIsHidden = fromSlide.style.display === 'none';
+ if( fromSlideIsHidden ) fromSlide.style.display = this.Reveal.getConfig().display;
+
+ // Inject our auto-animate styles for this transition
+ let css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {
+ return this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );
+ } );
+
+ if( fromSlideIsHidden ) fromSlide.style.display = 'none';
+
+ // Animate unmatched elements, if enabled
+ if( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {
+
+ // Our default timings for unmatched elements
+ let defaultUnmatchedDuration = animationOptions.duration * 0.8,
+ defaultUnmatchedDelay = animationOptions.duration * 0.2;
+
+ this.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {
+
+ let unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );
+ let id = 'unmatched';
+
+ // If there is a duration or delay set specifically for this
+ // element our unmatched elements should adhere to those
+ if( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {
+ id = 'unmatched-' + autoAnimateCounter++;
+ css.push( `[data-auto-animate="running"] [data-auto-animate-target="${id}"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );
+ }
+
+ unmatchedElement.dataset.autoAnimateTarget = id;
+
+ }, this );
+
+ // Our default transition for unmatched elements
+ css.push( `[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );
+
+ }
+
+ // Setting the whole chunk of CSS at once is the most
+ // efficient way to do this. Using sheet.insertRule
+ // is multiple factors slower.
+ this.autoAnimateStyleSheet.innerHTML = css.join( '' );
+
+ // Start the animation next cycle
+ requestAnimationFrame( () => {
+ if( this.autoAnimateStyleSheet ) {
+ // This forces our newly injected styles to be applied in Firefox
+ getComputedStyle( this.autoAnimateStyleSheet ).fontWeight;
+
+ toSlide.dataset.autoAnimate = 'running';
+ }
+ } );
+
+ this.Reveal.dispatchEvent({
+ type: 'autoanimate',
+ data: {
+ fromSlide,
+ toSlide,
+ sheet: this.autoAnimateStyleSheet
+ }
+ });
+
+ }
+
+ }
+
+ /**
+ * Rolls back all changes that we've made to the DOM so
+ * that as part of animating.
+ */
+ reset() {
+
+ // Reset slides
+ queryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=""])' ).forEach( element => {
+ element.dataset.autoAnimate = '';
+ } );
+
+ // Reset elements
+ queryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {
+ delete element.dataset.autoAnimateTarget;
+ } );
+
+ // Remove the animation sheet
+ if( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {
+ this.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );
+ this.autoAnimateStyleSheet = null;
+ }
+
+ }
+
+ /**
+ * Creates a FLIP animation where the `to` element starts out
+ * in the `from` element position and animates to its original
+ * state.
+ *
+ * @param {HTMLElement} from
+ * @param {HTMLElement} to
+ * @param {Object} elementOptions Options for this element pair
+ * @param {Object} animationOptions Options set at the slide level
+ * @param {String} id Unique ID that we can use to identify this
+ * auto-animate element in the DOM
+ */
+ autoAnimateElements( from, to, elementOptions, animationOptions, id ) {
+
+ // 'from' elements are given a data-auto-animate-target with no value,
+ // 'to' elements are are given a data-auto-animate-target with an ID
+ from.dataset.autoAnimateTarget = '';
+ to.dataset.autoAnimateTarget = id;
+
+ // Each element may override any of the auto-animate options
+ // like transition easing, duration and delay via data-attributes
+ let options = this.getAutoAnimateOptions( to, animationOptions );
+
+ // If we're using a custom element matcher the element options
+ // may contain additional transition overrides
+ if( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;
+ if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;
+ if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;
+
+ let fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),
+ toProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );
+
+ // Maintain fragment visibility for matching elements when
+ // we're navigating forwards, this way the viewer won't need
+ // to step through the same fragments twice
+ if( to.classList.contains( 'fragment' ) ) {
+
+ // Don't auto-animate the opacity of fragments to avoid
+ // conflicts with fragment animations
+ delete toProps.styles['opacity'];
+
+ if( from.classList.contains( 'fragment' ) ) {
+
+ let fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
+ let toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
+
+ // Only skip the fragment if the fragment animation style
+ // remains unchanged
+ if( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {
+ to.classList.add( 'visible', 'disabled' );
+ }
+
+ }
+
+ }
+
+ // If translation and/or scaling are enabled, css transform
+ // the 'to' element so that it matches the position and size
+ // of the 'from' element
+ if( elementOptions.translate !== false || elementOptions.scale !== false ) {
+
+ let presentationScale = this.Reveal.getScale();
+
+ let delta = {
+ x: ( fromProps.x - toProps.x ) / presentationScale,
+ y: ( fromProps.y - toProps.y ) / presentationScale,
+ scaleX: fromProps.width / toProps.width,
+ scaleY: fromProps.height / toProps.height
+ };
+
+ // Limit decimal points to avoid 0.0001px blur and stutter
+ delta.x = Math.round( delta.x * 1000 ) / 1000;
+ delta.y = Math.round( delta.y * 1000 ) / 1000;
+ delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
+ delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
+
+ let translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),
+ scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );
+
+ // No need to transform if nothing's changed
+ if( translate || scale ) {
+
+ let transform = [];
+
+ if( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );
+ if( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );
+
+ fromProps.styles['transform'] = transform.join( ' ' );
+ fromProps.styles['transform-origin'] = 'top left';
+
+ toProps.styles['transform'] = 'none';
+
+ }
+
+ }
+
+ // Delete all unchanged 'to' styles
+ for( let propertyName in toProps.styles ) {
+ const toValue = toProps.styles[propertyName];
+ const fromValue = fromProps.styles[propertyName];
+
+ if( toValue === fromValue ) {
+ delete toProps.styles[propertyName];
+ }
+ else {
+ // If these property values were set via a custom matcher providing
+ // an explicit 'from' and/or 'to' value, we always inject those values.
+ if( toValue.explicitValue === true ) {
+ toProps.styles[propertyName] = toValue.value;
+ }
+
+ if( fromValue.explicitValue === true ) {
+ fromProps.styles[propertyName] = fromValue.value;
+ }
+ }
+ }
+
+ let css = '';
+
+ let toStyleProperties = Object.keys( toProps.styles );
+
+ // Only create animate this element IF at least one style
+ // property has changed
+ if( toStyleProperties.length > 0 ) {
+
+ // Instantly move to the 'from' state
+ fromProps.styles['transition'] = 'none';
+
+ // Animate towards the 'to' state
+ toProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;
+ toProps.styles['transition-property'] = toStyleProperties.join( ', ' );
+ toProps.styles['will-change'] = toStyleProperties.join( ', ' );
+
+ // Build up our custom CSS. We need to override inline styles
+ // so we need to make our styles vErY IMPORTANT!1!!
+ let fromCSS = Object.keys( fromProps.styles ).map( propertyName => {
+ return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';
+ } ).join( '' );
+
+ let toCSS = Object.keys( toProps.styles ).map( propertyName => {
+ return propertyName + ': ' + toProps.styles[propertyName] + ' !important;';
+ } ).join( '' );
+
+ css = '[data-auto-animate-target="'+ id +'"] {'+ fromCSS +'}' +
+ '[data-auto-animate="running"] [data-auto-animate-target="'+ id +'"] {'+ toCSS +'}';
+
+ }
+
+ return css;
+
+ }
+
+ /**
+ * Returns the auto-animate options for the given element.
+ *
+ * @param {HTMLElement} element Element to pick up options
+ * from, either a slide or an animation target
+ * @param {Object} [inheritedOptions] Optional set of existing
+ * options
+ */
+ getAutoAnimateOptions( element, inheritedOptions ) {
+
+ let options = {
+ easing: this.Reveal.getConfig().autoAnimateEasing,
+ duration: this.Reveal.getConfig().autoAnimateDuration,
+ delay: 0
+ };
+
+ options = extend( options, inheritedOptions );
+
+ // Inherit options from parent elements
+ if( element.parentNode ) {
+ let autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );
+ if( autoAnimatedParent ) {
+ options = this.getAutoAnimateOptions( autoAnimatedParent, options );
+ }
+ }
+
+ if( element.dataset.autoAnimateEasing ) {
+ options.easing = element.dataset.autoAnimateEasing;
+ }
+
+ if( element.dataset.autoAnimateDuration ) {
+ options.duration = parseFloat( element.dataset.autoAnimateDuration );
+ }
+
+ if( element.dataset.autoAnimateDelay ) {
+ options.delay = parseFloat( element.dataset.autoAnimateDelay );
+ }
+
+ return options;
+
+ }
+
+ /**
+ * Returns an object containing all of the properties
+ * that can be auto-animated for the given element and
+ * their current computed values.
+ *
+ * @param {String} direction 'from' or 'to'
+ */
+ getAutoAnimatableProperties( direction, element, elementOptions ) {
+
+ let config = this.Reveal.getConfig();
+
+ let properties = { styles: [] };
+
+ // Position and size
+ if( elementOptions.translate !== false || elementOptions.scale !== false ) {
+ let bounds;
+
+ // Custom auto-animate may optionally return a custom tailored
+ // measurement function
+ if( typeof elementOptions.measure === 'function' ) {
+ bounds = elementOptions.measure( element );
+ }
+ else {
+ if( config.center ) {
+ // More precise, but breaks when used in combination
+ // with zoom for scaling the deck ¯\_(ツ)_/¯
+ bounds = element.getBoundingClientRect();
+ }
+ else {
+ let scale = this.Reveal.getScale();
+ bounds = {
+ x: element.offsetLeft * scale,
+ y: element.offsetTop * scale,
+ width: element.offsetWidth * scale,
+ height: element.offsetHeight * scale
+ };
+ }
+ }
+
+ properties.x = bounds.x;
+ properties.y = bounds.y;
+ properties.width = bounds.width;
+ properties.height = bounds.height;
+ }
+
+ const computedStyles = getComputedStyle( element );
+
+ // CSS styles
+ ( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {
+ let value;
+
+ // `style` is either the property name directly, or an object
+ // definition of a style property
+ if( typeof style === 'string' ) style = { property: style };
+
+ if( typeof style.from !== 'undefined' && direction === 'from' ) {
+ value = { value: style.from, explicitValue: true };
+ }
+ else if( typeof style.to !== 'undefined' && direction === 'to' ) {
+ value = { value: style.to, explicitValue: true };
+ }
+ else {
+ // Use a unitless value for line-height so that it inherits properly
+ if( style.property === 'line-height' ) {
+ value = parseFloat( computedStyles['line-height'] ) / parseFloat( computedStyles['font-size'] );
+ }
+
+ if( isNaN(value) ) {
+ value = computedStyles[style.property];
+ }
+ }
+
+ if( value !== '' ) {
+ properties.styles[style.property] = value;
+ }
+ } );
+
+ return properties;
+
+ }
+
+ /**
+ * Get a list of all element pairs that we can animate
+ * between the given slides.
+ *
+ * @param {HTMLElement} fromSlide
+ * @param {HTMLElement} toSlide
+ *
+ * @return {Array} Each value is an array where [0] is
+ * the element we're animating from and [1] is the
+ * element we're animating to
+ */
+ getAutoAnimatableElements( fromSlide, toSlide ) {
+
+ let matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;
+
+ let pairs = matcher.call( this, fromSlide, toSlide );
+
+ let reserved = [];
+
+ // Remove duplicate pairs
+ return pairs.filter( ( pair, index ) => {
+ if( reserved.indexOf( pair.to ) === -1 ) {
+ reserved.push( pair.to );
+ return true;
+ }
+ } );
+
+ }
+
+ /**
+ * Identifies matching elements between slides.
+ *
+ * You can specify a custom matcher function by using
+ * the `autoAnimateMatcher` config option.
+ */
+ getAutoAnimatePairs( fromSlide, toSlide ) {
+
+ let pairs = [];
+
+ const codeNodes = 'pre';
+ const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
+ const mediaNodes = 'img, video, iframe';
+
+ // Explicit matches via data-id
+ this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
+ return node.nodeName + ':::' + node.getAttribute( 'data-id' );
+ } );
+
+ // Text
+ this.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {
+ return node.nodeName + ':::' + node.innerText;
+ } );
+
+ // Media
+ this.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {
+ return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );
+ } );
+
+ // Code
+ this.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {
+ return node.nodeName + ':::' + node.innerText;
+ } );
+
+ pairs.forEach( pair => {
+ // Disable scale transformations on text nodes, we transition
+ // each individual text property instead
+ if( matches( pair.from, textNodes ) ) {
+ pair.options = { scale: false };
+ }
+ // Animate individual lines of code
+ else if( matches( pair.from, codeNodes ) ) {
+
+ // Transition the code block's width and height instead of scaling
+ // to prevent its content from being squished
+ pair.options = { scale: false, styles: [ 'width', 'height' ] };
+
+ // Lines of code
+ this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {
+ return node.textContent;
+ }, {
+ scale: false,
+ styles: [],
+ measure: this.getLocalBoundingBox.bind( this )
+ } );
+
+ // Line numbers
+ this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {
+ return node.getAttribute( 'data-line-number' );
+ }, {
+ scale: false,
+ styles: [ 'width' ],
+ measure: this.getLocalBoundingBox.bind( this )
+ } );
+
+ }
+
+ }, this );
+
+ return pairs;
+
+ }
+
+ /**
+ * Helper method which returns a bounding box based on
+ * the given elements offset coordinates.
+ *
+ * @param {HTMLElement} element
+ * @return {Object} x, y, width, height
+ */
+ getLocalBoundingBox( element ) {
+
+ const presentationScale = this.Reveal.getScale();
+
+ return {
+ x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,
+ y: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,
+ width: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,
+ height: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100
+ };
+
+ }
+
+ /**
+ * Finds matching elements between two slides.
+ *
+ * @param {Array} pairs List of pairs to push matches to
+ * @param {HTMLElement} fromScope Scope within the from element exists
+ * @param {HTMLElement} toScope Scope within the to element exists
+ * @param {String} selector CSS selector of the element to match
+ * @param {Function} serializer A function that accepts an element and returns
+ * a stringified ID based on its contents
+ * @param {Object} animationOptions Optional config options for this pair
+ */
+ findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {
+
+ let fromMatches = {};
+ let toMatches = {};
+
+ [].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
+ const key = serializer( element );
+ if( typeof key === 'string' && key.length ) {
+ fromMatches[key] = fromMatches[key] || [];
+ fromMatches[key].push( element );
+ }
+ } );
+
+ [].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
+ const key = serializer( element );
+ toMatches[key] = toMatches[key] || [];
+ toMatches[key].push( element );
+
+ let fromElement;
+
+ // Retrieve the 'from' element
+ if( fromMatches[key] ) {
+ const primaryIndex = toMatches[key].length - 1;
+ const secondaryIndex = fromMatches[key].length - 1;
+
+ // If there are multiple identical from elements, retrieve
+ // the one at the same index as our to-element.
+ if( fromMatches[key][ primaryIndex ] ) {
+ fromElement = fromMatches[key][ primaryIndex ];
+ fromMatches[key][ primaryIndex ] = null;
+ }
+ // If there are no matching from-elements at the same index,
+ // use the last one.
+ else if( fromMatches[key][ secondaryIndex ] ) {
+ fromElement = fromMatches[key][ secondaryIndex ];
+ fromMatches[key][ secondaryIndex ] = null;
+ }
+ }
+
+ // If we've got a matching pair, push it to the list of pairs
+ if( fromElement ) {
+ pairs.push({
+ from: fromElement,
+ to: element,
+ options: animationOptions
+ });
+ }
+ } );
+
+ }
+
+ /**
+ * Returns a all elements within the given scope that should
+ * be considered unmatched in an auto-animate transition. If
+ * fading of unmatched elements is turned on, these elements
+ * will fade when going between auto-animate slides.
+ *
+ * Note that parents of auto-animate targets are NOT considered
+ * unmatched since fading them would break the auto-animation.
+ *
+ * @param {HTMLElement} rootElement
+ * @return {Array}
+ */
+ getUnmatchedAutoAnimateElements( rootElement ) {
+
+ return [].slice.call( rootElement.children ).reduce( ( result, element ) => {
+
+ const containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );
+
+ // The element is unmatched if
+ // - It is not an auto-animate target
+ // - It does not contain any auto-animate targets
+ if( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {
+ result.push( element );
+ }
+
+ if( element.querySelector( '[data-auto-animate-target]' ) ) {
+ result = result.concat( this.getUnmatchedAutoAnimateElements( element ) );
+ }
+
+ return result;
+
+ }, [] );
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/backgrounds.js b/inst/reveal.js-5.1.0/js/controllers/backgrounds.js
new file mode 100644
index 0000000..e7ca644
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/backgrounds.js
@@ -0,0 +1,468 @@
+import { queryAll } from '../utils/util.js'
+import { colorToRgb, colorBrightness } from '../utils/color.js'
+
+/**
+ * Creates and updates slide backgrounds.
+ */
+export default class Backgrounds {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ }
+
+ render() {
+
+ this.element = document.createElement( 'div' );
+ this.element.className = 'backgrounds';
+ this.Reveal.getRevealElement().appendChild( this.element );
+
+ }
+
+ /**
+ * Creates the slide background elements and appends them
+ * to the background container. One element is created per
+ * slide no matter if the given slide has visible background.
+ */
+ create() {
+
+ // Clear prior backgrounds
+ this.element.innerHTML = '';
+ this.element.classList.add( 'no-transition' );
+
+ // Iterate over all horizontal slides
+ this.Reveal.getHorizontalSlides().forEach( slideh => {
+
+ let backgroundStack = this.createBackground( slideh, this.element );
+
+ // Iterate over all vertical slides
+ queryAll( slideh, 'section' ).forEach( slidev => {
+
+ this.createBackground( slidev, backgroundStack );
+
+ backgroundStack.classList.add( 'stack' );
+
+ } );
+
+ } );
+
+ // Add parallax background if specified
+ if( this.Reveal.getConfig().parallaxBackgroundImage ) {
+
+ this.element.style.backgroundImage = 'url("' + this.Reveal.getConfig().parallaxBackgroundImage + '")';
+ this.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;
+ this.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;
+ this.element.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;
+
+ // Make sure the below properties are set on the element - these properties are
+ // needed for proper transitions to be set on the element via CSS. To remove
+ // annoying background slide-in effect when the presentation starts, apply
+ // these properties after short time delay
+ setTimeout( () => {
+ this.Reveal.getRevealElement().classList.add( 'has-parallax-background' );
+ }, 1 );
+
+ }
+ else {
+
+ this.element.style.backgroundImage = '';
+ this.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );
+
+ }
+
+ }
+
+ /**
+ * Creates a background for the given slide.
+ *
+ * @param {HTMLElement} slide
+ * @param {HTMLElement} container The element that the background
+ * should be appended to
+ * @return {HTMLElement} New background div
+ */
+ createBackground( slide, container ) {
+
+ // Main slide background element
+ let element = document.createElement( 'div' );
+ element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
+
+ // Inner background element that wraps images/videos/iframes
+ let contentElement = document.createElement( 'div' );
+ contentElement.className = 'slide-background-content';
+
+ element.appendChild( contentElement );
+ container.appendChild( element );
+
+ slide.slideBackgroundElement = element;
+ slide.slideBackgroundContentElement = contentElement;
+
+ // Syncs the background to reflect all current background settings
+ this.sync( slide );
+
+ return element;
+
+ }
+
+ /**
+ * Renders all of the visual properties of a slide background
+ * based on the various background attributes.
+ *
+ * @param {HTMLElement} slide
+ */
+ sync( slide ) {
+
+ const element = slide.slideBackgroundElement,
+ contentElement = slide.slideBackgroundContentElement;
+
+ const data = {
+ background: slide.getAttribute( 'data-background' ),
+ backgroundSize: slide.getAttribute( 'data-background-size' ),
+ backgroundImage: slide.getAttribute( 'data-background-image' ),
+ backgroundVideo: slide.getAttribute( 'data-background-video' ),
+ backgroundIframe: slide.getAttribute( 'data-background-iframe' ),
+ backgroundColor: slide.getAttribute( 'data-background-color' ),
+ backgroundGradient: slide.getAttribute( 'data-background-gradient' ),
+ backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
+ backgroundPosition: slide.getAttribute( 'data-background-position' ),
+ backgroundTransition: slide.getAttribute( 'data-background-transition' ),
+ backgroundOpacity: slide.getAttribute( 'data-background-opacity' ),
+ };
+
+ const dataPreload = slide.hasAttribute( 'data-preload' );
+
+ // Reset the prior background state in case this is not the
+ // initial sync
+ slide.classList.remove( 'has-dark-background' );
+ slide.classList.remove( 'has-light-background' );
+
+ element.removeAttribute( 'data-loaded' );
+ element.removeAttribute( 'data-background-hash' );
+ element.removeAttribute( 'data-background-size' );
+ element.removeAttribute( 'data-background-transition' );
+ element.style.backgroundColor = '';
+
+ contentElement.style.backgroundSize = '';
+ contentElement.style.backgroundRepeat = '';
+ contentElement.style.backgroundPosition = '';
+ contentElement.style.backgroundImage = '';
+ contentElement.style.opacity = '';
+ contentElement.innerHTML = '';
+
+ if( data.background ) {
+ // Auto-wrap image urls in url(...)
+ if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp|webp)([?#\s]|$)/gi.test( data.background ) ) {
+ slide.setAttribute( 'data-background-image', data.background );
+ }
+ else {
+ element.style.background = data.background;
+ }
+ }
+
+ // Create a hash for this combination of background settings.
+ // This is used to determine when two slide backgrounds are
+ // the same.
+ if( data.background || data.backgroundColor || data.backgroundGradient || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
+ element.setAttribute( 'data-background-hash', data.background +
+ data.backgroundSize +
+ data.backgroundImage +
+ data.backgroundVideo +
+ data.backgroundIframe +
+ data.backgroundColor +
+ data.backgroundGradient +
+ data.backgroundRepeat +
+ data.backgroundPosition +
+ data.backgroundTransition +
+ data.backgroundOpacity );
+ }
+
+ // Additional and optional background properties
+ if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
+ if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
+ if( data.backgroundGradient ) element.style.backgroundImage = data.backgroundGradient;
+ if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
+
+ if( dataPreload ) element.setAttribute( 'data-preload', '' );
+
+ // Background image options are set on the content wrapper
+ if( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;
+ if( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;
+ if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
+ if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
+
+ const contrastClass = this.getContrastClass( slide );
+
+ if( typeof contrastClass === 'string' ) {
+ slide.classList.add( contrastClass );
+ }
+
+ }
+
+ /**
+ * Returns a class name that can be applied to a slide to indicate
+ * if it has a light or dark background.
+ *
+ * @param {*} slide
+ *
+ * @returns {string|null}
+ */
+ getContrastClass( slide ) {
+
+ const element = slide.slideBackgroundElement;
+
+ // If this slide has a background color, we add a class that
+ // signals if it is light or dark. If the slide has no background
+ // color, no class will be added
+ let contrastColor = slide.getAttribute( 'data-background-color' );
+
+ // If no bg color was found, or it cannot be converted by colorToRgb, check the computed background
+ if( !contrastColor || !colorToRgb( contrastColor ) ) {
+ let computedBackgroundStyle = window.getComputedStyle( element );
+ if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
+ contrastColor = computedBackgroundStyle.backgroundColor;
+ }
+ }
+
+ if( contrastColor ) {
+ const rgb = colorToRgb( contrastColor );
+
+ // Ignore fully transparent backgrounds. Some browsers return
+ // rgba(0,0,0,0) when reading the computed background color of
+ // an element with no background
+ if( rgb && rgb.a !== 0 ) {
+ if( colorBrightness( contrastColor ) < 128 ) {
+ return 'has-dark-background';
+ }
+ else {
+ return 'has-light-background';
+ }
+ }
+ }
+
+ return null;
+
+ }
+
+ /**
+ * Bubble the 'has-light-background'/'has-dark-background' classes.
+ */
+ bubbleSlideContrastClassToElement( slide, target ) {
+
+ [ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
+ if( slide.classList.contains( classToBubble ) ) {
+ target.classList.add( classToBubble );
+ }
+ else {
+ target.classList.remove( classToBubble );
+ }
+ }, this );
+
+ }
+
+ /**
+ * Updates the background elements to reflect the current
+ * slide.
+ *
+ * @param {boolean} includeAll If true, the backgrounds of
+ * all vertical slides (not just the present) will be updated.
+ */
+ update( includeAll = false ) {
+
+ let config = this.Reveal.getConfig();
+ let currentSlide = this.Reveal.getCurrentSlide();
+ let indices = this.Reveal.getIndices();
+
+ let currentBackground = null;
+
+ // Reverse past/future classes when in RTL mode
+ let horizontalPast = config.rtl ? 'future' : 'past',
+ horizontalFuture = config.rtl ? 'past' : 'future';
+
+ // Update the classes of all backgrounds to match the
+ // states of their slides (past/present/future)
+ Array.from( this.element.childNodes ).forEach( ( backgroundh, h ) => {
+
+ backgroundh.classList.remove( 'past', 'present', 'future' );
+
+ if( h < indices.h ) {
+ backgroundh.classList.add( horizontalPast );
+ }
+ else if ( h > indices.h ) {
+ backgroundh.classList.add( horizontalFuture );
+ }
+ else {
+ backgroundh.classList.add( 'present' );
+
+ // Store a reference to the current background element
+ currentBackground = backgroundh;
+ }
+
+ if( includeAll || h === indices.h ) {
+ queryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => {
+
+ backgroundv.classList.remove( 'past', 'present', 'future' );
+
+ const indexv = typeof indices.v === 'number' ? indices.v : 0;
+
+ if( v < indexv ) {
+ backgroundv.classList.add( 'past' );
+ }
+ else if ( v > indexv ) {
+ backgroundv.classList.add( 'future' );
+ }
+ else {
+ backgroundv.classList.add( 'present' );
+
+ // Only if this is the present horizontal and vertical slide
+ if( h === indices.h ) currentBackground = backgroundv;
+ }
+
+ } );
+ }
+
+ } );
+
+ // The previous background may refer to a DOM element that has
+ // been removed after a presentation is synced & bgs are recreated
+ if( this.previousBackground && !this.previousBackground.closest( 'body' ) ) {
+ this.previousBackground = null;
+ }
+
+ if( currentBackground && this.previousBackground ) {
+
+ // Don't transition between identical backgrounds. This
+ // prevents unwanted flicker.
+ let previousBackgroundHash = this.previousBackground.getAttribute( 'data-background-hash' );
+ let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
+
+ if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {
+ this.element.classList.add( 'no-transition' );
+
+ // If multiple slides have the same background video, carry
+ // the <video> element forward so that it plays continuously
+ // across multiple slides
+ const currentVideo = currentBackground.querySelector( 'video' );
+ const previousVideo = this.previousBackground.querySelector( 'video' );
+
+ if( currentVideo && previousVideo ) {
+
+ const currentVideoParent = currentVideo.parentNode;
+ const previousVideoParent = previousVideo.parentNode;
+
+ // Swap the two videos
+ previousVideoParent.appendChild( currentVideo );
+ currentVideoParent.appendChild( previousVideo );
+
+ }
+ }
+
+ }
+
+ // Stop content inside of previous backgrounds
+ if( this.previousBackground ) {
+
+ this.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );
+
+ }
+
+ // Start content in the current background
+ if( currentBackground ) {
+
+ this.Reveal.slideContent.startEmbeddedContent( currentBackground );
+
+ let currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );
+ if( currentBackgroundContent ) {
+
+ let backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';
+
+ // Restart GIFs (doesn't work in Firefox)
+ if( /\.gif/i.test( backgroundImageURL ) ) {
+ currentBackgroundContent.style.backgroundImage = '';
+ window.getComputedStyle( currentBackgroundContent ).opacity;
+ currentBackgroundContent.style.backgroundImage = backgroundImageURL;
+ }
+
+ }
+
+ this.previousBackground = currentBackground;
+
+ }
+
+ // If there's a background brightness flag for this slide,
+ // bubble it to the .reveal container
+ if( currentSlide ) {
+ this.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );
+ }
+
+ // Allow the first background to apply without transition
+ setTimeout( () => {
+ this.element.classList.remove( 'no-transition' );
+ }, 10 );
+
+ }
+
+ /**
+ * Updates the position of the parallax background based
+ * on the current slide index.
+ */
+ updateParallax() {
+
+ let indices = this.Reveal.getIndices();
+
+ if( this.Reveal.getConfig().parallaxBackgroundImage ) {
+
+ let horizontalSlides = this.Reveal.getHorizontalSlides(),
+ verticalSlides = this.Reveal.getVerticalSlides();
+
+ let backgroundSize = this.element.style.backgroundSize.split( ' ' ),
+ backgroundWidth, backgroundHeight;
+
+ if( backgroundSize.length === 1 ) {
+ backgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );
+ }
+ else {
+ backgroundWidth = parseInt( backgroundSize[0], 10 );
+ backgroundHeight = parseInt( backgroundSize[1], 10 );
+ }
+
+ let slideWidth = this.element.offsetWidth,
+ horizontalSlideCount = horizontalSlides.length,
+ horizontalOffsetMultiplier,
+ horizontalOffset;
+
+ if( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) {
+ horizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal;
+ }
+ else {
+ horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;
+ }
+
+ horizontalOffset = horizontalOffsetMultiplier * indices.h * -1;
+
+ let slideHeight = this.element.offsetHeight,
+ verticalSlideCount = verticalSlides.length,
+ verticalOffsetMultiplier,
+ verticalOffset;
+
+ if( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) {
+ verticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical;
+ }
+ else {
+ verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );
+ }
+
+ verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0;
+
+ this.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
+
+ }
+
+ }
+
+ destroy() {
+
+ this.element.remove();
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/controls.js b/inst/reveal.js-5.1.0/js/controllers/controls.js
new file mode 100644
index 0000000..3d150da
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/controls.js
@@ -0,0 +1,279 @@
+import { queryAll, enterFullscreen } from '../utils/util.js'
+import { isAndroid } from '../utils/device.js'
+
+/**
+ * Manages our presentation controls. This includes both
+ * the built-in control arrows as well as event monitoring
+ * of any elements within the presentation with either of the
+ * following helper classes:
+ * - .navigate-up
+ * - .navigate-right
+ * - .navigate-down
+ * - .navigate-left
+ * - .navigate-next
+ * - .navigate-prev
+ * - .enter-fullscreen
+ */
+export default class Controls {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this );
+ this.onNavigateRightClicked = this.onNavigateRightClicked.bind( this );
+ this.onNavigateUpClicked = this.onNavigateUpClicked.bind( this );
+ this.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );
+ this.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );
+ this.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );
+ this.onEnterFullscreen = this.onEnterFullscreen.bind( this );
+
+ }
+
+ render() {
+
+ const rtl = this.Reveal.getConfig().rtl;
+ const revealElement = this.Reveal.getRevealElement();
+
+ this.element = document.createElement( 'aside' );
+ this.element.className = 'controls';
+ this.element.innerHTML =
+ `<button class="navigate-left" aria-label="${ rtl ? 'next slide' : 'previous slide' }"><div class="controls-arrow"></div></button>
+ <button class="navigate-right" aria-label="${ rtl ? 'previous slide' : 'next slide' }"><div class="controls-arrow"></div></button>
+ <button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>
+ <button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>`;
+
+ this.Reveal.getRevealElement().appendChild( this.element );
+
+ // There can be multiple instances of controls throughout the page
+ this.controlsLeft = queryAll( revealElement, '.navigate-left' );
+ this.controlsRight = queryAll( revealElement, '.navigate-right' );
+ this.controlsUp = queryAll( revealElement, '.navigate-up' );
+ this.controlsDown = queryAll( revealElement, '.navigate-down' );
+ this.controlsPrev = queryAll( revealElement, '.navigate-prev' );
+ this.controlsNext = queryAll( revealElement, '.navigate-next' );
+ this.controlsFullscreen = queryAll( revealElement, '.enter-fullscreen' );
+
+ // The left, right and down arrows in the standard reveal.js controls
+ this.controlsRightArrow = this.element.querySelector( '.navigate-right' );
+ this.controlsLeftArrow = this.element.querySelector( '.navigate-left' );
+ this.controlsDownArrow = this.element.querySelector( '.navigate-down' );
+
+ }
+
+ /**
+ * Called when the reveal.js config is updated.
+ */
+ configure( config, oldConfig ) {
+
+ this.element.style.display = config.controls ? 'block' : 'none';
+
+ this.element.setAttribute( 'data-controls-layout', config.controlsLayout );
+ this.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
+
+ }
+
+ bind() {
+
+ // Listen to both touch and click events, in case the device
+ // supports both
+ let pointerEvents = [ 'touchstart', 'click' ];
+
+ // Only support touch for Android, fixes double navigations in
+ // stock browser
+ if( isAndroid ) {
+ pointerEvents = [ 'touchstart' ];
+ }
+
+ pointerEvents.forEach( eventName => {
+ this.controlsLeft.forEach( el => el.addEventListener( eventName, this.onNavigateLeftClicked, false ) );
+ this.controlsRight.forEach( el => el.addEventListener( eventName, this.onNavigateRightClicked, false ) );
+ this.controlsUp.forEach( el => el.addEventListener( eventName, this.onNavigateUpClicked, false ) );
+ this.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) );
+ this.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) );
+ this.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) );
+ this.controlsFullscreen.forEach( el => el.addEventListener( eventName, this.onEnterFullscreen, false ) );
+ } );
+
+ }
+
+ unbind() {
+
+ [ 'touchstart', 'click' ].forEach( eventName => {
+ this.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) );
+ this.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) );
+ this.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) );
+ this.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) );
+ this.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) );
+ this.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) );
+ this.controlsFullscreen.forEach( el => el.removeEventListener( eventName, this.onEnterFullscreen, false ) );
+ } );
+
+ }
+
+ /**
+ * Updates the state of all control/navigation arrows.
+ */
+ update() {
+
+ let routes = this.Reveal.availableRoutes();
+
+ // Remove the 'enabled' class from all directions
+ [...this.controlsLeft, ...this.controlsRight, ...this.controlsUp, ...this.controlsDown, ...this.controlsPrev, ...this.controlsNext].forEach( node => {
+ node.classList.remove( 'enabled', 'fragmented' );
+
+ // Set 'disabled' attribute on all directions
+ node.setAttribute( 'disabled', 'disabled' );
+ } );
+
+ // Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
+ if( routes.left ) this.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( routes.right ) this.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( routes.up ) this.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( routes.down ) this.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+ // Prev/next buttons
+ if( routes.left || routes.up ) this.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( routes.right || routes.down ) this.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+ // Highlight fragment directions
+ let currentSlide = this.Reveal.getCurrentSlide();
+ if( currentSlide ) {
+
+ let fragmentsRoutes = this.Reveal.fragments.availableRoutes();
+
+ // Always apply fragment decorator to prev/next buttons
+ if( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+ // Apply fragment decorators to directional buttons based on
+ // what slide axis they are in
+ if( this.Reveal.isVerticalSlide( currentSlide ) ) {
+ if( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ }
+ else {
+ if( fragmentsRoutes.prev ) this.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ if( fragmentsRoutes.next ) this.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+ }
+
+ }
+
+ if( this.Reveal.getConfig().controlsTutorial ) {
+
+ let indices = this.Reveal.getIndices();
+
+ // Highlight control arrows with an animation to ensure
+ // that the viewer knows how to navigate
+ if( !this.Reveal.hasNavigatedVertically() && routes.down ) {
+ this.controlsDownArrow.classList.add( 'highlight' );
+ }
+ else {
+ this.controlsDownArrow.classList.remove( 'highlight' );
+
+ if( this.Reveal.getConfig().rtl ) {
+
+ if( !this.Reveal.hasNavigatedHorizontally() && routes.left && indices.v === 0 ) {
+ this.controlsLeftArrow.classList.add( 'highlight' );
+ }
+ else {
+ this.controlsLeftArrow.classList.remove( 'highlight' );
+ }
+
+ } else {
+
+ if( !this.Reveal.hasNavigatedHorizontally() && routes.right && indices.v === 0 ) {
+ this.controlsRightArrow.classList.add( 'highlight' );
+ }
+ else {
+ this.controlsRightArrow.classList.remove( 'highlight' );
+ }
+ }
+ }
+ }
+ }
+
+ destroy() {
+
+ this.unbind();
+ this.element.remove();
+
+ }
+
+ /**
+ * Event handlers for navigation control buttons.
+ */
+ onNavigateLeftClicked( event ) {
+
+ event.preventDefault();
+ this.Reveal.onUserInput();
+
+ if( this.Reveal.getConfig().navigationMode === 'linear' ) {
+ this.Reveal.prev();
+ }
+ else {
+ this.Reveal.left();
+ }
+
+ }
+
+ onNavigateRightClicked( event ) {
+
+ event.preventDefault();
+ this.Reveal.onUserInput();
+
+ if( this.Reveal.getConfig().navigationMode === 'linear' ) {
+ this.Reveal.next();
+ }
+ else {
+ this.Reveal.right();
+ }
+
+ }
+
+ onNavigateUpClicked( event ) {
+
+ event.preventDefault();
+ this.Reveal.onUserInput();
+
+ this.Reveal.up();
+
+ }
+
+ onNavigateDownClicked( event ) {
+
+ event.preventDefault();
+ this.Reveal.onUserInput();
+
+ this.Reveal.down();
+
+ }
+
+ onNavigatePrevClicked( event ) {
+
+ event.preventDefault();
+ this.Reveal.onUserInput();
+
+ this.Reveal.prev();
+
+ }
+
+ onNavigateNextClicked( event ) {
+
+ event.preventDefault();
+ this.Reveal.onUserInput();
+
+ this.Reveal.next();
+
+ }
+
+ onEnterFullscreen( event ) {
+
+ const config = this.Reveal.getConfig();
+ const viewport = this.Reveal.getViewportElement();
+
+ enterFullscreen( config.embedded ? viewport : viewport.parentElement );
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/focus.js b/inst/reveal.js-5.1.0/js/controllers/focus.js
new file mode 100644
index 0000000..3e68c3f
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/focus.js
@@ -0,0 +1,103 @@
+import { closest } from '../utils/util.js'
+
+/**
+ * Manages focus when a presentation is embedded. This
+ * helps us only capture keyboard from the presentation
+ * a user is currently interacting with in a page where
+ * multiple presentations are embedded.
+ */
+
+const STATE_FOCUS = 'focus';
+const STATE_BLUR = 'blur';
+
+export default class Focus {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.onRevealPointerDown = this.onRevealPointerDown.bind( this );
+ this.onDocumentPointerDown = this.onDocumentPointerDown.bind( this );
+
+ }
+
+ /**
+ * Called when the reveal.js config is updated.
+ */
+ configure( config, oldConfig ) {
+
+ if( config.embedded ) {
+ this.blur();
+ }
+ else {
+ this.focus();
+ this.unbind();
+ }
+
+ }
+
+ bind() {
+
+ if( this.Reveal.getConfig().embedded ) {
+ this.Reveal.getRevealElement().addEventListener( 'pointerdown', this.onRevealPointerDown, false );
+ }
+
+ }
+
+ unbind() {
+
+ this.Reveal.getRevealElement().removeEventListener( 'pointerdown', this.onRevealPointerDown, false );
+ document.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );
+
+ }
+
+ focus() {
+
+ if( this.state !== STATE_FOCUS ) {
+ this.Reveal.getRevealElement().classList.add( 'focused' );
+ document.addEventListener( 'pointerdown', this.onDocumentPointerDown, false );
+ }
+
+ this.state = STATE_FOCUS;
+
+ }
+
+ blur() {
+
+ if( this.state !== STATE_BLUR ) {
+ this.Reveal.getRevealElement().classList.remove( 'focused' );
+ document.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );
+ }
+
+ this.state = STATE_BLUR;
+
+ }
+
+ isFocused() {
+
+ return this.state === STATE_FOCUS;
+
+ }
+
+ destroy() {
+
+ this.Reveal.getRevealElement().classList.remove( 'focused' );
+
+ }
+
+ onRevealPointerDown( event ) {
+
+ this.focus();
+
+ }
+
+ onDocumentPointerDown( event ) {
+
+ let revealElement = closest( event.target, '.reveal' );
+ if( !revealElement || revealElement !== this.Reveal.getRevealElement() ) {
+ this.blur();
+ }
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/fragments.js b/inst/reveal.js-5.1.0/js/controllers/fragments.js
new file mode 100644
index 0000000..0a84530
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/fragments.js
@@ -0,0 +1,375 @@
+import { extend, queryAll } from '../utils/util.js'
+
+/**
+ * Handles sorting and navigation of slide fragments.
+ * Fragments are elements within a slide that are
+ * revealed/animated incrementally.
+ */
+export default class Fragments {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ }
+
+ /**
+ * Called when 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.
+ */
+ disable() {
+
+ queryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {
+ element.classList.add( 'visible' );
+ element.classList.remove( 'current-fragment' );
+ } );
+
+ }
+
+ /**
+ * Reverse of #disable(). Only called if fragments have
+ * previously been disabled.
+ */
+ enable() {
+
+ queryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {
+ element.classList.remove( 'visible' );
+ element.classList.remove( 'current-fragment' );
+ } );
+
+ }
+
+ /**
+ * Returns an object describing the available fragment
+ * directions.
+ *
+ * @return {{prev: boolean, next: boolean}}
+ */
+ availableRoutes() {
+
+ let currentSlide = this.Reveal.getCurrentSlide();
+ if( currentSlide && this.Reveal.getConfig().fragments ) {
+ let fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' );
+ let hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' );
+
+ return {
+ prev: fragments.length - hiddenFragments.length > 0,
+ next: !!hiddenFragments.length
+ };
+ }
+ else {
+ return { prev: false, next: false };
+ }
+
+ }
+
+ /**
+ * Return a sorted fragments list, ordered by an increasing
+ * "data-fragment-index" attribute.
+ *
+ * Fragments will be revealed in the order that they are returned by
+ * this function, so you can use the index attributes to control the
+ * order of fragment appearance.
+ *
+ * To maintain a sensible default fragment order, fragments are presumed
+ * to be passed in document order. This function adds a "fragment-index"
+ * attribute to each node if such an attribute is not already present,
+ * and sets that attribute to an integer value which is the position of
+ * the fragment within the fragments list.
+ *
+ * @param {object[]|*} fragments
+ * @param {boolean} grouped If true the returned array will contain
+ * nested arrays for all fragments with the same index
+ * @return {object[]} sorted Sorted array of fragments
+ */
+ sort( fragments, grouped = false ) {
+
+ fragments = Array.from( fragments );
+
+ let ordered = [],
+ unordered = [],
+ sorted = [];
+
+ // Group ordered and unordered elements
+ fragments.forEach( fragment => {
+ if( fragment.hasAttribute( 'data-fragment-index' ) ) {
+ let index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );
+
+ if( !ordered[index] ) {
+ ordered[index] = [];
+ }
+
+ ordered[index].push( fragment );
+ }
+ else {
+ unordered.push( [ fragment ] );
+ }
+ } );
+
+ // Append fragments without explicit indices in their
+ // DOM order
+ ordered = ordered.concat( unordered );
+
+ // Manually count the index up per group to ensure there
+ // are no gaps
+ let index = 0;
+
+ // Push all fragments in their sorted order to an array,
+ // this flattens the groups
+ ordered.forEach( group => {
+ group.forEach( fragment => {
+ sorted.push( fragment );
+ fragment.setAttribute( 'data-fragment-index', index );
+ } );
+
+ index ++;
+ } );
+
+ return grouped === true ? ordered : sorted;
+
+ }
+
+ /**
+ * Sorts and formats all of fragments in the
+ * presentation.
+ */
+ sortAll() {
+
+ this.Reveal.getHorizontalSlides().forEach( horizontalSlide => {
+
+ let verticalSlides = queryAll( horizontalSlide, 'section' );
+ verticalSlides.forEach( ( verticalSlide, y ) => {
+
+ this.sort( verticalSlide.querySelectorAll( '.fragment' ) );
+
+ }, this );
+
+ if( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) );
+
+ } );
+
+ }
+
+ /**
+ * Refreshes the fragments on the current slide so that they
+ * have the appropriate classes (.visible + .current-fragment).
+ *
+ * @param {number} [index] The index of the current fragment
+ * @param {array} [fragments] Array containing all fragments
+ * in the current slide
+ *
+ * @return {{shown: array, hidden: array}}
+ */
+ update( index, fragments, slide = this.Reveal.getCurrentSlide() ) {
+
+ let changedFragments = {
+ shown: [],
+ hidden: []
+ };
+
+ if( slide && this.Reveal.getConfig().fragments ) {
+
+ fragments = fragments || this.sort( slide.querySelectorAll( '.fragment' ) );
+
+ if( fragments.length ) {
+
+ let maxIndex = 0;
+
+ if( typeof index !== 'number' ) {
+ let currentFragment = this.sort( slide.querySelectorAll( '.fragment.visible' ) ).pop();
+ if( currentFragment ) {
+ index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
+ }
+ }
+
+ Array.from( fragments ).forEach( ( el, i ) => {
+
+ if( el.hasAttribute( 'data-fragment-index' ) ) {
+ i = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );
+ }
+
+ maxIndex = Math.max( maxIndex, i );
+
+ // Visible fragments
+ if( i <= index ) {
+ let wasVisible = el.classList.contains( 'visible' )
+ el.classList.add( 'visible' );
+ el.classList.remove( 'current-fragment' );
+
+ if( i === index ) {
+ // Announce the fragments one by one to the Screen Reader
+ this.Reveal.announceStatus( this.Reveal.getStatusText( el ) );
+
+ el.classList.add( 'current-fragment' );
+ this.Reveal.slideContent.startEmbeddedContent( el );
+ }
+
+ if( !wasVisible ) {
+ changedFragments.shown.push( el )
+ this.Reveal.dispatchEvent({
+ target: el,
+ type: 'visible',
+ bubbles: false
+ });
+ }
+ }
+ // Hidden fragments
+ else {
+ let wasVisible = el.classList.contains( 'visible' )
+ el.classList.remove( 'visible' );
+ el.classList.remove( 'current-fragment' );
+
+ if( wasVisible ) {
+ this.Reveal.slideContent.stopEmbeddedContent( el );
+ changedFragments.hidden.push( el );
+ this.Reveal.dispatchEvent({
+ target: el,
+ type: 'hidden',
+ bubbles: false
+ });
+ }
+ }
+
+ } );
+
+ // Write the current fragment index to the slide <section>.
+ // This can be used by end users to apply styles based on
+ // the current fragment index.
+ index = typeof index === 'number' ? index : -1;
+ index = Math.max( Math.min( index, maxIndex ), -1 );
+ slide.setAttribute( 'data-fragment', index );
+
+ }
+
+ }
+
+ if( changedFragments.hidden.length ) {
+ this.Reveal.dispatchEvent({
+ type: 'fragmenthidden',
+ data: {
+ fragment: changedFragments.hidden[0],
+ fragments: changedFragments.hidden
+ }
+ });
+ }
+
+ if( changedFragments.shown.length ) {
+ this.Reveal.dispatchEvent({
+ type: 'fragmentshown',
+ data: {
+ fragment: changedFragments.shown[0],
+ fragments: changedFragments.shown
+ }
+ });
+ }
+
+ return changedFragments;
+
+ }
+
+ /**
+ * Formats the fragments on the given slide so that they have
+ * valid indices. Call this if fragments are changed in the DOM
+ * after reveal.js has already initialized.
+ *
+ * @param {HTMLElement} slide
+ * @return {Array} a list of the HTML fragments that were synced
+ */
+ sync( slide = this.Reveal.getCurrentSlide() ) {
+
+ return this.sort( slide.querySelectorAll( '.fragment' ) );
+
+ }
+
+ /**
+ * Navigate to the specified slide fragment.
+ *
+ * @param {?number} index The index of the fragment that
+ * should be shown, -1 means all are invisible
+ * @param {number} offset Integer offset to apply to the
+ * fragment index
+ *
+ * @return {boolean} true if a change was made in any
+ * fragments visibility as part of this call
+ */
+ goto( index, offset = 0 ) {
+
+ let currentSlide = this.Reveal.getCurrentSlide();
+ if( currentSlide && this.Reveal.getConfig().fragments ) {
+
+ let fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) );
+ if( fragments.length ) {
+
+ // If no index is specified, find the current
+ if( typeof index !== 'number' ) {
+ let lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop();
+
+ if( lastVisibleFragment ) {
+ index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
+ }
+ else {
+ index = -1;
+ }
+ }
+
+ // Apply the offset if there is one
+ index += offset;
+
+ let changedFragments = this.update( index, fragments );
+
+ this.Reveal.controls.update();
+ this.Reveal.progress.update();
+
+ if( this.Reveal.getConfig().fragmentInURL ) {
+ this.Reveal.location.writeURL();
+ }
+
+ return !!( changedFragments.shown.length || changedFragments.hidden.length );
+
+ }
+
+ }
+
+ return false;
+
+ }
+
+ /**
+ * Navigate to the next slide fragment.
+ *
+ * @return {boolean} true if there was a next fragment,
+ * false otherwise
+ */
+ next() {
+
+ return this.goto( null, 1 );
+
+ }
+
+ /**
+ * Navigate to the previous slide fragment.
+ *
+ * @return {boolean} true if there was a previous fragment,
+ * false otherwise
+ */
+ prev() {
+
+ return this.goto( null, -1 );
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/jumptoslide.js b/inst/reveal.js-5.1.0/js/controllers/jumptoslide.js
new file mode 100644
index 0000000..5a63260
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/jumptoslide.js
@@ -0,0 +1,197 @@
+import {
+ SLIDE_NUMBER_FORMAT_CURRENT,
+ SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL
+} from "../utils/constants";
+
+/**
+ * Makes it possible to jump to a slide by entering its
+ * slide number or id.
+ */
+export default class JumpToSlide {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.onInput = this.onInput.bind( this );
+ this.onBlur = this.onBlur.bind( this );
+ this.onKeyDown = this.onKeyDown.bind( this );
+
+ }
+
+ render() {
+
+ this.element = document.createElement( 'div' );
+ this.element.className = 'jump-to-slide';
+
+ this.jumpInput = document.createElement( 'input' );
+ this.jumpInput.type = 'text';
+ this.jumpInput.className = 'jump-to-slide-input';
+ this.jumpInput.placeholder = 'Jump to slide';
+ this.jumpInput.addEventListener( 'input', this.onInput );
+ this.jumpInput.addEventListener( 'keydown', this.onKeyDown );
+ this.jumpInput.addEventListener( 'blur', this.onBlur );
+
+ this.element.appendChild( this.jumpInput );
+
+ }
+
+ show() {
+
+ this.indicesOnShow = this.Reveal.getIndices();
+
+ this.Reveal.getRevealElement().appendChild( this.element );
+ this.jumpInput.focus();
+
+ }
+
+ hide() {
+
+ if( this.isVisible() ) {
+ this.element.remove();
+ this.jumpInput.value = '';
+
+ clearTimeout( this.jumpTimeout );
+ delete this.jumpTimeout;
+ }
+
+ }
+
+ isVisible() {
+
+ return !!this.element.parentNode;
+
+ }
+
+ /**
+ * Parses the current input and jumps to the given slide.
+ */
+ jump() {
+
+ clearTimeout( this.jumpTimeout );
+ delete this.jumpTimeout;
+
+ let query = this.jumpInput.value.trim( '' );
+ let indices;
+
+ // When slide numbers are formatted to be a single linear mumber
+ // (instead of showing a separate horizontal/vertical index) we
+ // use the same format for slide jumps
+ if( /^\d+$/.test( query ) ) {
+ const slideNumberFormat = this.Reveal.getConfig().slideNumber;
+ if( slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT || slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL ) {
+ const slide = this.Reveal.getSlides()[ parseInt( query, 10 ) - 1 ];
+ if( slide ) {
+ indices = this.Reveal.getIndices( slide );
+ }
+ }
+ }
+
+ if( !indices ) {
+ // If the query uses "horizontal.vertical" format, convert to
+ // "horizontal/vertical" so that our URL parser can understand
+ if( /^\d+\.\d+$/.test( query ) ) {
+ query = query.replace( '.', '/' );
+ }
+
+ indices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } );
+ }
+
+ // Still no valid index? Fall back on a text search
+ if( !indices && /\S+/i.test( query ) && query.length > 1 ) {
+ indices = this.search( query );
+ }
+
+ if( indices && query !== '' ) {
+ this.Reveal.slide( indices.h, indices.v, indices.f );
+ return true;
+ }
+ else {
+ this.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );
+ return false;
+ }
+
+ }
+
+ jumpAfter( delay ) {
+
+ clearTimeout( this.jumpTimeout );
+ this.jumpTimeout = setTimeout( () => this.jump(), delay );
+
+ }
+
+ /**
+ * A lofi search that looks for the given query in all
+ * of our slides and returns the first match.
+ */
+ search( query ) {
+
+ const regex = new RegExp( '\\b' + query.trim() + '\\b', 'i' );
+
+ const slide = this.Reveal.getSlides().find( ( slide ) => {
+ return regex.test( slide.innerText );
+ } );
+
+ if( slide ) {
+ return this.Reveal.getIndices( slide );
+ }
+ else {
+ return null;
+ }
+
+ }
+
+ /**
+ * Reverts back to the slide we were on when jump to slide was
+ * invoked.
+ */
+ cancel() {
+
+ this.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );
+ this.hide();
+
+ }
+
+ confirm() {
+
+ this.jump();
+ this.hide();
+
+ }
+
+ destroy() {
+
+ this.jumpInput.removeEventListener( 'input', this.onInput );
+ this.jumpInput.removeEventListener( 'keydown', this.onKeyDown );
+ this.jumpInput.removeEventListener( 'blur', this.onBlur );
+
+ this.element.remove();
+
+ }
+
+ onKeyDown( event ) {
+
+ if( event.keyCode === 13 ) {
+ this.confirm();
+ }
+ else if( event.keyCode === 27 ) {
+ this.cancel();
+
+ event.stopImmediatePropagation();
+ }
+
+ }
+
+ onInput( event ) {
+
+ this.jumpAfter( 200 );
+
+ }
+
+ onBlur() {
+
+ setTimeout( () => this.hide(), 1 );
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/keyboard.js b/inst/reveal.js-5.1.0/js/controllers/keyboard.js
new file mode 100644
index 0000000..5666b44
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/keyboard.js
@@ -0,0 +1,400 @@
+import { enterFullscreen } from '../utils/util.js'
+
+/**
+ * Handles all reveal.js keyboard interactions.
+ */
+export default class Keyboard {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ // A key:value map of keyboard keys and descriptions of
+ // the actions they trigger
+ this.shortcuts = {};
+
+ // Holds custom key code mappings
+ this.bindings = {};
+
+ this.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );
+
+ }
+
+ /**
+ * 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 , Shift SPACE'] = 'Previous slide';
+ this.shortcuts['← , H'] = 'Navigate left';
+ this.shortcuts['→ , L'] = 'Navigate right';
+ this.shortcuts['↑ , K'] = 'Navigate up';
+ this.shortcuts['↓ , J'] = 'Navigate down';
+ }
+
+ this.shortcuts['Alt + ←/↑/→/↓'] = 'Navigate without fragments';
+ this.shortcuts['Shift + ←/↑/→/↓'] = 'Jump to first/last slide';
+ this.shortcuts['B , .'] = 'Pause';
+ this.shortcuts['F'] = 'Fullscreen';
+ this.shortcuts['G'] = 'Jump to slide';
+ this.shortcuts['ESC, O'] = 'Slide overview';
+
+ }
+
+ /**
+ * Starts listening for keyboard events.
+ */
+ bind() {
+
+ document.addEventListener( 'keydown', this.onDocumentKeyDown, false );
+
+ }
+
+ /**
+ * Stops listening for keyboard events.
+ */
+ unbind() {
+
+ document.removeEventListener( 'keydown', this.onDocumentKeyDown, false );
+
+ }
+
+ /**
+ * Add a custom key binding with optional description to
+ * be added to the help screen.
+ */
+ addKeyBinding( binding, callback ) {
+
+ if( typeof binding === 'object' && binding.keyCode ) {
+ this.bindings[binding.keyCode] = {
+ callback: callback,
+ key: binding.key,
+ description: binding.description
+ };
+ }
+ else {
+ this.bindings[binding] = {
+ callback: callback,
+ key: null,
+ description: null
+ };
+ }
+
+ }
+
+ /**
+ * Removes the specified custom key binding.
+ */
+ removeKeyBinding( keyCode ) {
+
+ delete this.bindings[keyCode];
+
+ }
+
+ /**
+ * Programmatically triggers a keyboard event
+ *
+ * @param {int} keyCode
+ */
+ triggerKey( keyCode ) {
+
+ this.onDocumentKeyDown( { keyCode } );
+
+ }
+
+ /**
+ * Registers a new shortcut to include in the help overlay
+ *
+ * @param {String} key
+ * @param {String} value
+ */
+ registerKeyboardShortcut( key, value ) {
+
+ this.shortcuts[key] = value;
+
+ }
+
+ getShortcuts() {
+
+ return this.shortcuts;
+
+ }
+
+ getBindings() {
+
+ return this.bindings;
+
+ }
+
+ /**
+ * Handler for the document level 'keydown' event.
+ *
+ * @param {object} event
+ */
+ onDocumentKeyDown( event ) {
+
+ let config = this.Reveal.getConfig();
+
+ // If there's a condition specified and it returns false,
+ // ignore this event
+ if( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {
+ return true;
+ }
+
+ // If keyboardCondition is set, only capture keyboard events
+ // for embedded decks when they are focused
+ if( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) {
+ return true;
+ }
+
+ // Shorthand
+ let keyCode = event.keyCode;
+
+ // Remember if auto-sliding was paused so we can toggle it
+ let autoSlideWasPaused = !this.Reveal.isAutoSliding();
+
+ this.Reveal.onUserInput( event );
+
+ // Is there a focused element that could be using the keyboard?
+ let activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;
+ let activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );
+ let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
+
+ // Whitelist certain modifiers for slide navigation shortcuts
+ let keyCodeUsesModifier = [32, 37, 38, 39, 40, 63, 78, 80, 191].indexOf( event.keyCode ) !== -1;
+
+ // Prevent all other events when a modifier is pressed
+ let unusedModifier = !( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&
+ ( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
+
+ // Disregard the event if there's a focused element or a
+ // keyboard modifier key is present
+ if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;
+
+ // While paused only allow resume keyboard events; 'b', 'v', '.'
+ let resumeKeyCodes = [66,86,190,191,112];
+ let key;
+
+ // Custom key bindings for togglePause should be able to resume
+ if( typeof config.keyboard === 'object' ) {
+ for( key in config.keyboard ) {
+ if( config.keyboard[key] === 'togglePause' ) {
+ resumeKeyCodes.push( parseInt( key, 10 ) );
+ }
+ }
+ }
+
+ if( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {
+ return false;
+ }
+
+ // Use linear navigation if we're configured to OR if
+ // the presentation is one-dimensional
+ let useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides();
+
+ let triggered = false;
+
+ // 1. User defined key bindings
+ if( typeof config.keyboard === 'object' ) {
+
+ for( key in config.keyboard ) {
+
+ // Check if this binding matches the pressed key
+ if( parseInt( key, 10 ) === keyCode ) {
+
+ let value = config.keyboard[ key ];
+
+ // Callback function
+ if( typeof value === 'function' ) {
+ value.apply( null, [ event ] );
+ }
+ // String shortcuts to reveal.js API
+ else if( typeof value === 'string' && typeof this.Reveal[ value ] === 'function' ) {
+ this.Reveal[ value ].call();
+ }
+
+ triggered = true;
+
+ }
+
+ }
+
+ }
+
+ // 2. Registered custom key bindings
+ if( triggered === false ) {
+
+ for( key in this.bindings ) {
+
+ // Check if this binding matches the pressed key
+ if( parseInt( key, 10 ) === keyCode ) {
+
+ let action = this.bindings[ key ].callback;
+
+ // Callback function
+ if( typeof action === 'function' ) {
+ action.apply( null, [ event ] );
+ }
+ // String shortcuts to reveal.js API
+ else if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) {
+ this.Reveal[ action ].call();
+ }
+
+ triggered = true;
+ }
+ }
+ }
+
+ // 3. System defined key bindings
+ if( triggered === false ) {
+
+ // Assume true and try to prove false
+ triggered = true;
+
+ // P, PAGE UP
+ if( keyCode === 80 || keyCode === 33 ) {
+ this.Reveal.prev({skipFragments: event.altKey});
+ }
+ // N, PAGE DOWN
+ else if( keyCode === 78 || keyCode === 34 ) {
+ this.Reveal.next({skipFragments: event.altKey});
+ }
+ // H, LEFT
+ else if( keyCode === 72 || keyCode === 37 ) {
+ if( event.shiftKey ) {
+ this.Reveal.slide( 0 );
+ }
+ else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+ if( config.rtl ) {
+ this.Reveal.next({skipFragments: event.altKey});
+ }
+ else {
+ this.Reveal.prev({skipFragments: event.altKey});
+ }
+ }
+ else {
+ this.Reveal.left({skipFragments: event.altKey});
+ }
+ }
+ // L, RIGHT
+ else if( keyCode === 76 || keyCode === 39 ) {
+ if( event.shiftKey ) {
+ this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );
+ }
+ else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+ if( config.rtl ) {
+ this.Reveal.prev({skipFragments: event.altKey});
+ }
+ else {
+ this.Reveal.next({skipFragments: event.altKey});
+ }
+ }
+ else {
+ this.Reveal.right({skipFragments: event.altKey});
+ }
+ }
+ // K, UP
+ else if( keyCode === 75 || keyCode === 38 ) {
+ if( event.shiftKey ) {
+ this.Reveal.slide( undefined, 0 );
+ }
+ else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+ this.Reveal.prev({skipFragments: event.altKey});
+ }
+ else {
+ this.Reveal.up({skipFragments: event.altKey});
+ }
+ }
+ // J, DOWN
+ else if( keyCode === 74 || keyCode === 40 ) {
+ if( event.shiftKey ) {
+ this.Reveal.slide( undefined, Number.MAX_VALUE );
+ }
+ else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+ this.Reveal.next({skipFragments: event.altKey});
+ }
+ else {
+ this.Reveal.down({skipFragments: event.altKey});
+ }
+ }
+ // HOME
+ else if( keyCode === 36 ) {
+ this.Reveal.slide( 0 );
+ }
+ // END
+ else if( keyCode === 35 ) {
+ this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );
+ }
+ // SPACE
+ else if( keyCode === 32 ) {
+ if( this.Reveal.overview.isActive() ) {
+ this.Reveal.overview.deactivate();
+ }
+ if( event.shiftKey ) {
+ this.Reveal.prev({skipFragments: event.altKey});
+ }
+ else {
+ this.Reveal.next({skipFragments: event.altKey});
+ }
+ }
+ // TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
+ else if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {
+ this.Reveal.togglePause();
+ }
+ // F
+ else if( keyCode === 70 ) {
+ enterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement );
+ }
+ // A
+ else if( keyCode === 65 ) {
+ if( config.autoSlideStoppable ) {
+ this.Reveal.toggleAutoSlide( autoSlideWasPaused );
+ }
+ }
+ // G
+ else if( keyCode === 71 ) {
+ if( config.jumpToSlide ) {
+ this.Reveal.toggleJumpToSlide();
+ }
+ }
+ // ?
+ else if( ( keyCode === 63 || keyCode === 191 ) && event.shiftKey ) {
+ this.Reveal.toggleHelp();
+ }
+ // F1
+ else if( keyCode === 112 ) {
+ this.Reveal.toggleHelp();
+ }
+ else {
+ triggered = false;
+ }
+
+ }
+
+ // If the input resulted in a triggered action we should prevent
+ // the browsers default behavior
+ if( triggered ) {
+ event.preventDefault && event.preventDefault();
+ }
+ // ESC or O key
+ else if( keyCode === 27 || keyCode === 79 ) {
+ if( this.Reveal.closeOverlay() === false ) {
+ this.Reveal.overview.toggle();
+ }
+
+ event.preventDefault && event.preventDefault();
+ }
+
+ // If auto-sliding is enabled we need to cue up
+ // another timeout
+ this.Reveal.cueAutoSlide();
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/location.js b/inst/reveal.js-5.1.0/js/controllers/location.js
new file mode 100644
index 0000000..2299d47
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/location.js
@@ -0,0 +1,247 @@
+/**
+ * Reads and writes the URL based on reveal.js' current state.
+ */
+export default class Location {
+
+ // The minimum number of milliseconds that must pass between
+ // calls to history.replaceState
+ MAX_REPLACE_STATE_FREQUENCY = 1000
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ // Delays updates to the URL due to a Chrome thumbnailer bug
+ this.writeURLTimeout = 0;
+
+ this.replaceStateTimestamp = 0;
+
+ this.onWindowHashChange = this.onWindowHashChange.bind( this );
+
+ }
+
+ bind() {
+
+ window.addEventListener( 'hashchange', this.onWindowHashChange, false );
+
+ }
+
+ unbind() {
+
+ window.removeEventListener( 'hashchange', this.onWindowHashChange, false );
+
+ }
+
+ /**
+ * Returns the slide indices for the given hash link.
+ *
+ * @param {string} [hash] the hash string that we want to
+ * find the indices for
+ *
+ * @returns slide indices or null
+ */
+ getIndicesFromHash( hash=window.location.hash, options={} ) {
+
+ // Attempt to parse the hash as either an index or name
+ let name = hash.replace( /^#\/?/, '' );
+ let bits = name.split( '/' );
+
+ // If the first bit is not fully numeric and there is a name we
+ // can assume that this is a named link
+ if( !/^[0-9]*$/.test( bits[0] ) && name.length ) {
+ let slide;
+
+ let f;
+
+ // Parse named links with fragments (#/named-link/2)
+ if( /\/[-\d]+$/g.test( name ) ) {
+ f = parseInt( name.split( '/' ).pop(), 10 );
+ f = isNaN(f) ? undefined : f;
+ name = name.split( '/' ).shift();
+ }
+
+ // Ensure the named link is a valid HTML ID attribute
+ try {
+ slide = document
+ .getElementById( decodeURIComponent( name ) )
+ .closest('.slides section');
+ }
+ catch ( error ) { }
+
+ if( slide ) {
+ return { ...this.Reveal.getIndices( slide ), f };
+ }
+ }
+ else {
+ const config = this.Reveal.getConfig();
+ let hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;
+
+ // Read the index components of the hash
+ let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
+ v = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,
+ f;
+
+ if( config.fragmentInURL ) {
+ f = parseInt( bits[2], 10 );
+ if( isNaN( f ) ) {
+ f = undefined;
+ }
+ }
+
+ return { h, v, f };
+ }
+
+ // The hash couldn't be parsed or no matching named link was found
+ return null
+
+ }
+
+ /**
+ * Reads the current URL (hash) and navigates accordingly.
+ */
+ readURL() {
+
+ const currentIndices = this.Reveal.getIndices();
+ const newIndices = this.getIndicesFromHash();
+
+ if( newIndices ) {
+ if( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) {
+ this.Reveal.slide( newIndices.h, newIndices.v, newIndices.f );
+ }
+ }
+ // If no new indices are available, we're trying to navigate to
+ // a slide hash that does not exist
+ else {
+ this.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 );
+ }
+
+ }
+
+ /**
+ * Updates the page URL (hash) to reflect the current
+ * state.
+ *
+ * @param {number} delay The time in ms to wait before
+ * writing the hash
+ */
+ writeURL( delay ) {
+
+ let config = this.Reveal.getConfig();
+ let currentSlide = this.Reveal.getCurrentSlide();
+
+ // Make sure there's never more than one timeout running
+ clearTimeout( this.writeURLTimeout );
+
+ // If a delay is specified, timeout this call
+ if( typeof delay === 'number' ) {
+ this.writeURLTimeout = setTimeout( this.writeURL, delay );
+ }
+ else if( currentSlide ) {
+
+ let hash = this.getHash();
+
+ // If we're configured to push to history OR the history
+ // API is not available.
+ if( config.history ) {
+ window.location.hash = hash;
+ }
+ // If we're configured to reflect the current slide in the
+ // URL without pushing to history.
+ else if( config.hash ) {
+ // If the hash is empty, don't add it to the URL
+ if( hash === '/' ) {
+ this.debouncedReplaceState( window.location.pathname + window.location.search );
+ }
+ else {
+ this.debouncedReplaceState( '#' + hash );
+ }
+ }
+ // UPDATE: The below nuking of all hash changes breaks
+ // anchors on pages where reveal.js is running. Removed
+ // in 4.0. Why was it here in the first place? ¯\_(ツ)_/¯
+ //
+ // If history and hash are both disabled, a hash may still
+ // be added to the URL by clicking on a href with a hash
+ // target. Counter this by always removing the hash.
+ // else {
+ // window.history.replaceState( null, null, window.location.pathname + window.location.search );
+ // }
+
+ }
+
+ }
+
+ replaceState( url ) {
+
+ window.history.replaceState( null, null, url );
+ this.replaceStateTimestamp = Date.now();
+
+ }
+
+ debouncedReplaceState( url ) {
+
+ clearTimeout( this.replaceStateTimeout );
+
+ if( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) {
+ this.replaceState( url );
+ }
+ else {
+ this.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY );
+ }
+
+ }
+
+ /**
+ * Return a hash URL that will resolve to the given slide location.
+ *
+ * @param {HTMLElement} [slide=currentSlide] The slide to link to
+ */
+ getHash( slide ) {
+
+ let url = '/';
+
+ // Attempt to create a named link based on the slide's ID
+ let s = slide || this.Reveal.getCurrentSlide();
+ let id = s ? s.getAttribute( 'id' ) : null;
+ if( id ) {
+ id = encodeURIComponent( id );
+ }
+
+ let index = this.Reveal.getIndices( slide );
+ if( !this.Reveal.getConfig().fragmentInURL ) {
+ index.f = undefined;
+ }
+
+ // If the current slide has an ID, use that as a named link,
+ // but we don't support named links with a fragment index
+ if( typeof id === 'string' && id.length ) {
+ url = '/' + id;
+
+ // If there is also a fragment, append that at the end
+ // of the named link, like: #/named-link/2
+ if( index.f >= 0 ) url += '/' + index.f;
+ }
+ // Otherwise use the /h/v index
+ else {
+ let hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0;
+ if( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase;
+ if( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase );
+ if( index.f >= 0 ) url += '/' + index.f;
+ }
+
+ return url;
+
+ }
+
+ /**
+ * Handler for the window level 'hashchange' event.
+ *
+ * @param {object} [event]
+ */
+ onWindowHashChange( event ) {
+
+ this.readURL();
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/notes.js b/inst/reveal.js-5.1.0/js/controllers/notes.js
new file mode 100644
index 0000000..8af918c
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/notes.js
@@ -0,0 +1,126 @@
+/**
+ * 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.isScrollView() &&
+ !this.Reveal.isPrintView()
+ ) {
+ 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.isScrollView() &&
+ !this.Reveal.isPrintView()
+ ) {
+ 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();
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/overview.js b/inst/reveal.js-5.1.0/js/controllers/overview.js
new file mode 100644
index 0000000..4e146b6
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/overview.js
@@ -0,0 +1,255 @@
+import { SLIDES_SELECTOR } from '../utils/constants.js'
+import { extend, queryAll, transformElement } from '../utils/util.js'
+
+/**
+ * Handles all logic related to the overview mode
+ * (birds-eye view of all slides).
+ */
+export default class Overview {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.active = false;
+
+ this.onSlideClicked = this.onSlideClicked.bind( this );
+
+ }
+
+ /**
+ * Displays the overview of slides (quick nav) by scaling
+ * down and arranging all slide elements.
+ */
+ activate() {
+
+ // Only proceed if enabled in config
+ if( this.Reveal.getConfig().overview && !this.Reveal.isScrollView() && !this.isActive() ) {
+
+ this.active = true;
+
+ this.Reveal.getRevealElement().classList.add( 'overview' );
+
+ // Don't auto-slide while in overview mode
+ this.Reveal.cancelAutoSlide();
+
+ // Move the backgrounds element into the slide container to
+ // that the same scaling is applied
+ this.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() );
+
+ // Clicking on an overview slide navigates to it
+ queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {
+ if( !slide.classList.contains( 'stack' ) ) {
+ slide.addEventListener( 'click', this.onSlideClicked, true );
+ }
+ } );
+
+ // Calculate slide sizes
+ const margin = 70;
+ const slideSize = this.Reveal.getComputedSlideSize();
+ this.overviewSlideWidth = slideSize.width + margin;
+ this.overviewSlideHeight = slideSize.height + margin;
+
+ // Reverse in RTL mode
+ if( this.Reveal.getConfig().rtl ) {
+ this.overviewSlideWidth = -this.overviewSlideWidth;
+ }
+
+ this.Reveal.updateSlidesVisibility();
+
+ this.layout();
+ this.update();
+
+ this.Reveal.layout();
+
+ const indices = this.Reveal.getIndices();
+
+ // Notify observers of the overview showing
+ this.Reveal.dispatchEvent({
+ type: 'overviewshown',
+ data: {
+ 'indexh': indices.h,
+ 'indexv': indices.v,
+ 'currentSlide': this.Reveal.getCurrentSlide()
+ }
+ });
+
+ }
+
+ }
+
+ /**
+ * Uses CSS transforms to position all slides in a grid for
+ * display inside of the overview mode.
+ */
+ layout() {
+
+ // Layout slides
+ this.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => {
+ hslide.setAttribute( 'data-index-h', h );
+ transformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );
+
+ if( hslide.classList.contains( 'stack' ) ) {
+
+ queryAll( hslide, 'section' ).forEach( ( vslide, v ) => {
+ vslide.setAttribute( 'data-index-h', h );
+ vslide.setAttribute( 'data-index-v', v );
+
+ transformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );
+ } );
+
+ }
+ } );
+
+ // Layout slide backgrounds
+ Array.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => {
+ transformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );
+
+ queryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => {
+ transformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );
+ } );
+ } );
+
+ }
+
+ /**
+ * Moves the overview viewport to the current slides.
+ * Called each time the current slide changes.
+ */
+ update() {
+
+ const vmin = Math.min( window.innerWidth, window.innerHeight );
+ const scale = Math.max( vmin / 5, 150 ) / vmin;
+ const indices = this.Reveal.getIndices();
+
+ this.Reveal.transformSlides( {
+ overview: [
+ 'scale('+ scale +')',
+ 'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)',
+ 'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)'
+ ].join( ' ' )
+ } );
+
+ }
+
+ /**
+ * Exits the slide overview and enters the currently
+ * active slide.
+ */
+ deactivate() {
+
+ // Only proceed if enabled in config
+ if( this.Reveal.getConfig().overview ) {
+
+ this.active = false;
+
+ this.Reveal.getRevealElement().classList.remove( 'overview' );
+
+ // Temporarily add a class so that transitions can do different things
+ // depending on whether they are exiting/entering overview, or just
+ // moving from slide to slide
+ this.Reveal.getRevealElement().classList.add( 'overview-deactivating' );
+
+ setTimeout( () => {
+ this.Reveal.getRevealElement().classList.remove( 'overview-deactivating' );
+ }, 1 );
+
+ // Move the background element back out
+ this.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() );
+
+ // Clean up changes made to slides
+ queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {
+ transformElement( slide, '' );
+
+ slide.removeEventListener( 'click', this.onSlideClicked, true );
+ } );
+
+ // Clean up changes made to backgrounds
+ queryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => {
+ transformElement( background, '' );
+ } );
+
+ this.Reveal.transformSlides( { overview: '' } );
+
+ const indices = this.Reveal.getIndices();
+
+ this.Reveal.slide( indices.h, indices.v );
+ this.Reveal.layout();
+ this.Reveal.cueAutoSlide();
+
+ // Notify observers of the overview hiding
+ this.Reveal.dispatchEvent({
+ type: 'overviewhidden',
+ data: {
+ 'indexh': indices.h,
+ 'indexv': indices.v,
+ 'currentSlide': this.Reveal.getCurrentSlide()
+ }
+ });
+
+ }
+ }
+
+ /**
+ * Toggles the slide overview mode on and off.
+ *
+ * @param {Boolean} [override] Flag which overrides the
+ * toggle logic and forcibly sets the desired state. True means
+ * overview is open, false means it's closed.
+ */
+ toggle( override ) {
+
+ if( typeof override === 'boolean' ) {
+ override ? this.activate() : this.deactivate();
+ }
+ else {
+ this.isActive() ? this.deactivate() : this.activate();
+ }
+
+ }
+
+ /**
+ * Checks if the overview is currently active.
+ *
+ * @return {Boolean} true if the overview is active,
+ * false otherwise
+ */
+ isActive() {
+
+ return this.active;
+
+ }
+
+ /**
+ * Invoked when a slide is and we're in the overview.
+ *
+ * @param {object} event
+ */
+ onSlideClicked( event ) {
+
+ if( this.isActive() ) {
+ event.preventDefault();
+
+ let element = event.target;
+
+ while( element && !element.nodeName.match( /section/gi ) ) {
+ element = element.parentNode;
+ }
+
+ if( element && !element.classList.contains( 'disabled' ) ) {
+
+ this.deactivate();
+
+ if( element.nodeName.match( /section/gi ) ) {
+ let h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),
+ v = parseInt( element.getAttribute( 'data-index-v' ), 10 );
+
+ this.Reveal.slide( h, v );
+ }
+
+ }
+ }
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/plugins.js b/inst/reveal.js-5.1.0/js/controllers/plugins.js
new file mode 100644
index 0000000..88f57bf
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/plugins.js
@@ -0,0 +1,254 @@
+import { loadScript } from '../utils/loader.js'
+
+/**
+ * Manages loading and registering of reveal.js plugins.
+ */
+export default class Plugins {
+
+ constructor( reveal ) {
+
+ this.Reveal = reveal;
+
+ // Flags our current state (idle -> loading -> loaded)
+ this.state = 'idle';
+
+ // An id:instance map of currently registered plugins
+ this.registeredPlugins = {};
+
+ this.asyncDependencies = [];
+
+ }
+
+ /**
+ * Loads reveal.js dependencies, registers and
+ * initializes plugins.
+ *
+ * Plugins are direct references to a reveal.js plugin
+ * object that we register and initialize after any
+ * synchronous dependencies have loaded.
+ *
+ * Dependencies are defined via the 'dependencies' config
+ * option and will be loaded prior to starting reveal.js.
+ * Some dependencies may have an 'async' flag, if so they
+ * will load after reveal.js has been started up.
+ */
+ load( plugins, dependencies ) {
+
+ this.state = 'loading';
+
+ plugins.forEach( this.registerPlugin.bind( this ) );
+
+ return new Promise( resolve => {
+
+ let scripts = [],
+ scriptsToLoad = 0;
+
+ dependencies.forEach( s => {
+ // Load if there's no condition or the condition is truthy
+ if( !s.condition || s.condition() ) {
+ if( s.async ) {
+ this.asyncDependencies.push( s );
+ }
+ else {
+ scripts.push( s );
+ }
+ }
+ } );
+
+ if( scripts.length ) {
+ scriptsToLoad = scripts.length;
+
+ const scriptLoadedCallback = (s) => {
+ if( s && typeof s.callback === 'function' ) s.callback();
+
+ if( --scriptsToLoad === 0 ) {
+ this.initPlugins().then( resolve );
+ }
+ };
+
+ // Load synchronous scripts
+ scripts.forEach( s => {
+ if( typeof s.id === 'string' ) {
+ this.registerPlugin( s );
+ scriptLoadedCallback( s );
+ }
+ else if( typeof s.src === 'string' ) {
+ loadScript( s.src, () => scriptLoadedCallback(s) );
+ }
+ else {
+ console.warn( 'Unrecognized plugin format', s );
+ scriptLoadedCallback();
+ }
+ } );
+ }
+ else {
+ this.initPlugins().then( resolve );
+ }
+
+ } );
+
+ }
+
+ /**
+ * Initializes our plugins and waits for them to be ready
+ * before proceeding.
+ */
+ initPlugins() {
+
+ return new Promise( resolve => {
+
+ let pluginValues = Object.values( this.registeredPlugins );
+ let pluginsToInitialize = pluginValues.length;
+
+ // If there are no plugins, skip this step
+ if( pluginsToInitialize === 0 ) {
+ this.loadAsync().then( resolve );
+ }
+ // ... otherwise initialize plugins
+ else {
+
+ let initNextPlugin;
+
+ let afterPlugInitialized = () => {
+ if( --pluginsToInitialize === 0 ) {
+ this.loadAsync().then( resolve );
+ }
+ else {
+ initNextPlugin();
+ }
+ };
+
+ let i = 0;
+
+ // Initialize plugins serially
+ initNextPlugin = () => {
+
+ let plugin = pluginValues[i++];
+
+ // If the plugin has an 'init' method, invoke it
+ if( typeof plugin.init === 'function' ) {
+ let promise = plugin.init( this.Reveal );
+
+ // If the plugin returned a Promise, wait for it
+ if( promise && typeof promise.then === 'function' ) {
+ promise.then( afterPlugInitialized );
+ }
+ else {
+ afterPlugInitialized();
+ }
+ }
+ else {
+ afterPlugInitialized();
+ }
+
+ }
+
+ initNextPlugin();
+
+ }
+
+ } )
+
+ }
+
+ /**
+ * Loads all async reveal.js dependencies.
+ */
+ loadAsync() {
+
+ this.state = 'loaded';
+
+ if( this.asyncDependencies.length ) {
+ this.asyncDependencies.forEach( s => {
+ loadScript( s.src, s.callback );
+ } );
+ }
+
+ return Promise.resolve();
+
+ }
+
+ /**
+ * Registers a new plugin with this reveal.js instance.
+ *
+ * reveal.js waits for all registered plugins to initialize
+ * before considering itself ready, as long as the plugin
+ * is registered before calling `Reveal.initialize()`.
+ */
+ registerPlugin( plugin ) {
+
+ // Backwards compatibility to make reveal.js ~3.9.0
+ // plugins work with reveal.js 4.0.0
+ if( arguments.length === 2 && typeof arguments[0] === 'string' ) {
+ plugin = arguments[1];
+ plugin.id = arguments[0];
+ }
+ // Plugin can optionally be a function which we call
+ // to create an instance of the plugin
+ else if( typeof plugin === 'function' ) {
+ plugin = plugin();
+ }
+
+ let id = plugin.id;
+
+ if( typeof id !== 'string' ) {
+ console.warn( 'Unrecognized plugin format; can\'t find plugin.id', plugin );
+ }
+ else if( this.registeredPlugins[id] === undefined ) {
+ this.registeredPlugins[id] = plugin;
+
+ // If a plugin is registered after reveal.js is loaded,
+ // initialize it right away
+ if( this.state === 'loaded' && typeof plugin.init === 'function' ) {
+ plugin.init( this.Reveal );
+ }
+ }
+ else {
+ console.warn( 'reveal.js: "'+ id +'" plugin has already been registered' );
+ }
+
+ }
+
+ /**
+ * Checks if a specific plugin has been registered.
+ *
+ * @param {String} id Unique plugin identifier
+ */
+ hasPlugin( id ) {
+
+ return !!this.registeredPlugins[id];
+
+ }
+
+ /**
+ * Returns the specific plugin instance, if a plugin
+ * with the given ID has been registered.
+ *
+ * @param {String} id Unique plugin identifier
+ */
+ getPlugin( id ) {
+
+ return this.registeredPlugins[id];
+
+ }
+
+ getRegisteredPlugins() {
+
+ return this.registeredPlugins;
+
+ }
+
+ destroy() {
+
+ Object.values( this.registeredPlugins ).forEach( plugin => {
+ if( typeof plugin.destroy === 'function' ) {
+ plugin.destroy();
+ }
+ } );
+
+ this.registeredPlugins = {};
+ this.asyncDependencies = [];
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/pointer.js b/inst/reveal.js-5.1.0/js/controllers/pointer.js
new file mode 100644
index 0000000..1a02762
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/pointer.js
@@ -0,0 +1,126 @@
+/**
+ * Handles hiding of the pointer/cursor when inactive.
+ */
+export default class Pointer {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ // Throttles mouse wheel navigation
+ this.lastMouseWheelStep = 0;
+
+ // Is the mouse pointer currently hidden from view
+ this.cursorHidden = false;
+
+ // Timeout used to determine when the cursor is inactive
+ this.cursorInactiveTimeout = 0;
+
+ this.onDocumentCursorActive = this.onDocumentCursorActive.bind( this );
+ this.onDocumentMouseScroll = this.onDocumentMouseScroll.bind( this );
+
+ }
+
+ /**
+ * Called when the reveal.js config is updated.
+ */
+ configure( config, oldConfig ) {
+
+ if( config.mouseWheel ) {
+ document.addEventListener( 'wheel', this.onDocumentMouseScroll, false );
+ }
+ else {
+ document.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );
+ }
+
+ // Auto-hide the mouse pointer when its inactive
+ if( config.hideInactiveCursor ) {
+ document.addEventListener( 'mousemove', this.onDocumentCursorActive, false );
+ document.addEventListener( 'mousedown', this.onDocumentCursorActive, false );
+ }
+ else {
+ this.showCursor();
+
+ document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );
+ document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );
+ }
+
+ }
+
+ /**
+ * Shows the mouse pointer after it has been hidden with
+ * #hideCursor.
+ */
+ showCursor() {
+
+ if( this.cursorHidden ) {
+ this.cursorHidden = false;
+ this.Reveal.getRevealElement().style.cursor = '';
+ }
+
+ }
+
+ /**
+ * Hides the mouse pointer when it's on top of the .reveal
+ * container.
+ */
+ hideCursor() {
+
+ if( this.cursorHidden === false ) {
+ this.cursorHidden = true;
+ this.Reveal.getRevealElement().style.cursor = 'none';
+ }
+
+ }
+
+ destroy() {
+
+ this.showCursor();
+
+ document.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );
+ document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );
+ document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );
+
+ }
+
+ /**
+ * Called whenever there is mouse input at the document level
+ * to determine if the cursor is active or not.
+ *
+ * @param {object} event
+ */
+ onDocumentCursorActive( event ) {
+
+ this.showCursor();
+
+ clearTimeout( this.cursorInactiveTimeout );
+
+ this.cursorInactiveTimeout = setTimeout( this.hideCursor.bind( this ), this.Reveal.getConfig().hideCursorTime );
+
+ }
+
+ /**
+ * Handles mouse wheel scrolling, throttled to avoid skipping
+ * multiple slides.
+ *
+ * @param {object} event
+ */
+ onDocumentMouseScroll( event ) {
+
+ if( Date.now() - this.lastMouseWheelStep > 1000 ) {
+
+ this.lastMouseWheelStep = Date.now();
+
+ let delta = event.detail || -event.wheelDelta;
+ if( delta > 0 ) {
+ this.Reveal.next();
+ }
+ else if( delta < 0 ) {
+ this.Reveal.prev();
+ }
+
+ }
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/printview.js b/inst/reveal.js-5.1.0/js/controllers/printview.js
new file mode 100644
index 0000000..b335462
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/printview.js
@@ -0,0 +1,239 @@
+import { SLIDES_SELECTOR } from '../utils/constants.js'
+import { queryAll, createStyleSheet } from '../utils/util.js'
+
+/**
+ * Setups up our presentation for printing/exporting to PDF.
+ */
+export default class PrintView {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ }
+
+ /**
+ * Configures the presentation for printing to a static
+ * PDF.
+ */
+ async activate() {
+
+ const config = this.Reveal.getConfig();
+ const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )
+
+ // Compute slide numbers now, before we start duplicating slides
+ const injectPageNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );
+
+ const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
+
+ // Dimensions of the PDF pages
+ const pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
+ pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
+
+ // Dimensions of slides within the pages
+ const slideWidth = slideSize.width,
+ slideHeight = slideSize.height;
+
+ await new Promise( requestAnimationFrame );
+
+ // Let the browser know what page size we want to print
+ createStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
+
+ // Limit the size of certain elements to the dimensions of the slide
+ createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
+
+ document.documentElement.classList.add( 'reveal-print', 'print-pdf' );
+ document.body.style.width = pageWidth + 'px';
+ document.body.style.height = pageHeight + 'px';
+
+ const viewportElement = this.Reveal.getViewportElement();
+ let presentationBackground;
+ if( viewportElement ) {
+ const viewportStyles = window.getComputedStyle( viewportElement );
+ if( viewportStyles && viewportStyles.background ) {
+ presentationBackground = viewportStyles.background;
+ }
+ }
+
+ // Make sure stretch elements fit on slide
+ await new Promise( requestAnimationFrame );
+ this.Reveal.layoutSlideContents( slideWidth, slideHeight );
+
+ // Batch scrollHeight access to prevent layout thrashing
+ await new Promise( requestAnimationFrame );
+
+ const slideScrollHeights = slides.map( slide => slide.scrollHeight );
+
+ const pages = [];
+ const pageContainer = slides[0].parentNode;
+ let slideNumber = 1;
+
+ // Slide and slide background layout
+ slides.forEach( function( slide, index ) {
+
+ // Vertical stacks are not centred since their section
+ // children will be
+ if( slide.classList.contains( 'stack' ) === false ) {
+ // Center the slide inside of the page, giving the slide some margin
+ let left = ( pageWidth - slideWidth ) / 2;
+ let top = ( pageHeight - slideHeight ) / 2;
+
+ const contentHeight = slideScrollHeights[ index ];
+ let numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
+
+ // Adhere to configured pages per slide limit
+ numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
+
+ // Center slides vertically
+ if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
+ top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
+ }
+
+ // Wrap the slide in a page element and hide its overflow
+ // so that no page ever flows onto another
+ const page = document.createElement( 'div' );
+ pages.push( page );
+
+ page.className = 'pdf-page';
+ page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
+
+ // Copy the presentation-wide background to each individual
+ // page when printing
+ if( presentationBackground ) {
+ page.style.background = presentationBackground;
+ }
+
+ page.appendChild( slide );
+
+ // Position the slide inside of the page
+ slide.style.left = left + 'px';
+ slide.style.top = top + 'px';
+ slide.style.width = slideWidth + 'px';
+
+ this.Reveal.slideContent.layout( slide );
+
+ if( slide.slideBackgroundElement ) {
+ page.insertBefore( slide.slideBackgroundElement, slide );
+ }
+
+ // Inject notes if `showNotes` is enabled
+ if( config.showNotes ) {
+
+ // Are there notes for this slide?
+ const notes = this.Reveal.getSlideNotes( slide );
+ if( notes ) {
+
+ const notesSpacing = 8;
+ const notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
+ const notesElement = document.createElement( 'div' );
+ notesElement.classList.add( 'speaker-notes' );
+ notesElement.classList.add( 'speaker-notes-pdf' );
+ notesElement.setAttribute( 'data-layout', notesLayout );
+ notesElement.innerHTML = notes;
+
+ if( notesLayout === 'separate-page' ) {
+ pages.push( notesElement );
+ }
+ else {
+ notesElement.style.left = notesSpacing + 'px';
+ notesElement.style.bottom = notesSpacing + 'px';
+ notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
+ page.appendChild( notesElement );
+ }
+
+ }
+
+ }
+
+ // Inject page numbers if `slideNumbers` are enabled
+ if( injectPageNumbers ) {
+ const numberElement = document.createElement( 'div' );
+ numberElement.classList.add( 'slide-number' );
+ numberElement.classList.add( 'slide-number-pdf' );
+ numberElement.innerHTML = slideNumber++;
+ page.appendChild( numberElement );
+ }
+
+ // Copy page and show fragments one after another
+ if( config.pdfSeparateFragments ) {
+
+ // Each fragment 'group' is an array containing one or more
+ // fragments. Multiple fragments that appear at the same time
+ // are part of the same group.
+ const fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );
+
+ let previousFragmentStep;
+
+ fragmentGroups.forEach( function( fragments, index ) {
+
+ // Remove 'current-fragment' from the previous group
+ if( previousFragmentStep ) {
+ previousFragmentStep.forEach( function( fragment ) {
+ fragment.classList.remove( 'current-fragment' );
+ } );
+ }
+
+ // Show the fragments for the current index
+ fragments.forEach( function( fragment ) {
+ fragment.classList.add( 'visible', 'current-fragment' );
+ }, this );
+
+ // Create a separate page for the current fragment state
+ const clonedPage = page.cloneNode( true );
+
+ // Inject unique page numbers for fragments
+ if( injectPageNumbers ) {
+ const numberElement = clonedPage.querySelector( '.slide-number-pdf' );
+ const fragmentNumber = index + 1;
+ numberElement.innerHTML += '.' + fragmentNumber;
+ }
+
+ pages.push( clonedPage );
+
+ previousFragmentStep = fragments;
+
+ }, this );
+
+ // Reset the first/original page so that all fragments are hidden
+ fragmentGroups.forEach( function( fragments ) {
+ fragments.forEach( function( fragment ) {
+ fragment.classList.remove( 'visible', 'current-fragment' );
+ } );
+ } );
+
+ }
+ // Show all fragments
+ else {
+ queryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {
+ fragment.classList.add( 'visible' );
+ } );
+ }
+
+ }
+
+ }, this );
+
+ await new Promise( requestAnimationFrame );
+
+ pages.forEach( page => pageContainer.appendChild( page ) );
+
+ // Re-run JS-based content layout after the slide is added to page DOM
+ this.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );
+
+ // Notify subscribers that the PDF layout is good to go
+ this.Reveal.dispatchEvent({ type: 'pdf-ready' });
+
+ viewportElement.classList.remove( 'loading-scroll-mode' );
+
+ }
+
+ /**
+ * Checks if the print mode is/should be activated.
+ */
+ isActive() {
+
+ return this.Reveal.getConfig().view === 'print';
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/progress.js b/inst/reveal.js-5.1.0/js/controllers/progress.js
new file mode 100644
index 0000000..87e2aaf
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/progress.js
@@ -0,0 +1,110 @@
+/**
+ * Creates a visual progress bar for the presentation.
+ */
+export default class Progress {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.onProgressClicked = this.onProgressClicked.bind( this );
+
+ }
+
+ render() {
+
+ this.element = document.createElement( 'div' );
+ this.element.className = 'progress';
+ this.Reveal.getRevealElement().appendChild( this.element );
+
+ this.bar = document.createElement( 'span' );
+ this.element.appendChild( this.bar );
+
+ }
+
+ /**
+ * Called when the reveal.js config is updated.
+ */
+ configure( config, oldConfig ) {
+
+ this.element.style.display = config.progress ? 'block' : 'none';
+
+ }
+
+ bind() {
+
+ if( this.Reveal.getConfig().progress && this.element ) {
+ this.element.addEventListener( 'click', this.onProgressClicked, false );
+ }
+
+ }
+
+ unbind() {
+
+ if ( this.Reveal.getConfig().progress && this.element ) {
+ this.element.removeEventListener( 'click', this.onProgressClicked, false );
+ }
+
+ }
+
+ /**
+ * Updates the progress bar to reflect the current slide.
+ */
+ update() {
+
+ // Update progress if enabled
+ if( this.Reveal.getConfig().progress && this.bar ) {
+
+ let scale = this.Reveal.getProgress();
+
+ // Don't fill the progress bar if there's only one slide
+ if( this.Reveal.getTotalSlides() < 2 ) {
+ scale = 0;
+ }
+
+ this.bar.style.transform = 'scaleX('+ scale +')';
+
+ }
+
+ }
+
+ getMaxWidth() {
+
+ return this.Reveal.getRevealElement().offsetWidth;
+
+ }
+
+ /**
+ * Clicking on the progress bar results in a navigation to the
+ * closest approximate horizontal slide using this equation:
+ *
+ * ( clickX / presentationWidth ) * numberOfSlides
+ *
+ * @param {object} event
+ */
+ onProgressClicked( event ) {
+
+ this.Reveal.onUserInput( event );
+
+ event.preventDefault();
+
+ let slides = this.Reveal.getSlides();
+ let slidesTotal = slides.length;
+ let slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal );
+
+ if( this.Reveal.getConfig().rtl ) {
+ slideIndex = slidesTotal - slideIndex;
+ }
+
+ let targetIndices = this.Reveal.getIndices(slides[slideIndex]);
+ this.Reveal.slide( targetIndices.h, targetIndices.v );
+
+ }
+
+ destroy() {
+
+ this.element.remove();
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/scrollview.js b/inst/reveal.js-5.1.0/js/controllers/scrollview.js
new file mode 100644
index 0000000..fcdf601
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/scrollview.js
@@ -0,0 +1,919 @@
+import { HORIZONTAL_SLIDES_SELECTOR, HORIZONTAL_BACKGROUNDS_SELECTOR } from '../utils/constants.js'
+import { queryAll } from '../utils/util.js'
+
+const HIDE_SCROLLBAR_TIMEOUT = 500;
+const MAX_PROGRESS_SPACING = 4;
+const MIN_PROGRESS_SEGMENT_HEIGHT = 6;
+const MIN_PLAYHEAD_HEIGHT = 8;
+
+/**
+ * The scroll view lets you read a reveal.js presentation
+ * as a linear scrollable page.
+ */
+export default class ScrollView {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.active = false;
+ this.activatedCallbacks = [];
+
+ this.onScroll = this.onScroll.bind( this );
+
+ }
+
+ /**
+ * Activates the scroll view. This rearranges the presentation DOM
+ * by—among other things—wrapping each slide in a page element.
+ */
+ activate() {
+
+ if( this.active ) return;
+
+ const stateBeforeActivation = this.Reveal.getState();
+
+ this.active = true;
+
+ // Store the full presentation HTML so that we can restore it
+ // when/if the scroll view is deactivated
+ this.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;
+
+ const horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );
+ const horizontalBackgrounds = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_BACKGROUNDS_SELECTOR );
+
+ this.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-scroll' );
+
+ let presentationBackground;
+
+ const viewportStyles = window.getComputedStyle( this.viewportElement );
+ if( viewportStyles && viewportStyles.background ) {
+ presentationBackground = viewportStyles.background;
+ }
+
+ const pageElements = [];
+ const pageContainer = horizontalSlides[0].parentNode;
+
+ let previousSlide;
+
+ // Creates a new page element and appends the given slide/bg
+ // to it.
+ const createPageElement = ( slide, h, v, isVertical ) => {
+
+ let contentContainer;
+
+ // If this slide is part of an auto-animation sequence, we
+ // group it under the same page element as the previous slide
+ if( previousSlide && this.Reveal.shouldAutoAnimateBetween( previousSlide, slide ) ) {
+ contentContainer = document.createElement( 'div' );
+ contentContainer.className = 'scroll-page-content scroll-auto-animate-page';
+ contentContainer.style.display = 'none';
+ previousSlide.closest( '.scroll-page-content' ).parentNode.appendChild( contentContainer );
+ }
+ else {
+ // Wrap the slide in a page element and hide its overflow
+ // so that no page ever flows onto another
+ const page = document.createElement( 'div' );
+ page.className = 'scroll-page';
+ pageElements.push( page );
+
+ // This transfers over the background of the vertical stack containing
+ // the slide if it exists. Otherwise, it uses the presentation-wide
+ // background.
+ if( isVertical && horizontalBackgrounds.length > h ) {
+ const slideBackground = horizontalBackgrounds[h];
+ const pageBackground = window.getComputedStyle( slideBackground );
+
+ if( pageBackground && pageBackground.background ) {
+ page.style.background = pageBackground.background;
+ }
+ else if( presentationBackground ) {
+ page.style.background = presentationBackground;
+ }
+ } else if( presentationBackground ) {
+ page.style.background = presentationBackground;
+ }
+
+ const stickyContainer = document.createElement( 'div' );
+ stickyContainer.className = 'scroll-page-sticky';
+ page.appendChild( stickyContainer );
+
+ contentContainer = document.createElement( 'div' );
+ contentContainer.className = 'scroll-page-content';
+ stickyContainer.appendChild( contentContainer );
+ }
+
+ contentContainer.appendChild( slide );
+
+ slide.classList.remove( 'past', 'future' );
+ slide.setAttribute( 'data-index-h', h );
+ slide.setAttribute( 'data-index-v', v );
+
+ if( slide.slideBackgroundElement ) {
+ slide.slideBackgroundElement.remove( 'past', 'future' );
+ contentContainer.insertBefore( slide.slideBackgroundElement, slide );
+ }
+
+ previousSlide = slide;
+
+ }
+
+ // Slide and slide background layout
+ horizontalSlides.forEach( ( horizontalSlide, h ) => {
+
+ if( this.Reveal.isVerticalStack( horizontalSlide ) ) {
+ horizontalSlide.querySelectorAll( 'section' ).forEach( ( verticalSlide, v ) => {
+ createPageElement( verticalSlide, h, v, true );
+ });
+ }
+ else {
+ createPageElement( horizontalSlide, h, 0 );
+ }
+
+ }, this );
+
+ this.createProgressBar();
+
+ // Remove leftover stacks
+ queryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );
+
+ // Add our newly created pages to the DOM
+ pageElements.forEach( page => pageContainer.appendChild( page ) );
+
+ // Re-run JS-based content layout after the slide is added to page DOM
+ this.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );
+
+ this.Reveal.layout();
+ this.Reveal.setState( stateBeforeActivation );
+
+ this.activatedCallbacks.forEach( callback => callback() );
+ this.activatedCallbacks = [];
+
+ this.restoreScrollPosition();
+
+ this.viewportElement.classList.remove( 'loading-scroll-mode' );
+ this.viewportElement.addEventListener( 'scroll', this.onScroll, { passive: true } );
+
+ }
+
+ /**
+ * Deactivates the scroll view and restores the standard slide-based
+ * presentation.
+ */
+ deactivate() {
+
+ if( !this.active ) return;
+
+ const stateBeforeDeactivation = this.Reveal.getState();
+
+ this.active = false;
+
+ this.viewportElement.removeEventListener( 'scroll', this.onScroll );
+ this.viewportElement.classList.remove( 'reveal-scroll' );
+
+ this.removeProgressBar();
+
+ this.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;
+ this.Reveal.sync();
+ this.Reveal.setState( stateBeforeDeactivation );
+
+ this.slideHTMLBeforeActivation = null;
+
+ }
+
+ toggle( override ) {
+
+ if( typeof override === 'boolean' ) {
+ override ? this.activate() : this.deactivate();
+ }
+ else {
+ this.isActive() ? this.deactivate() : this.activate();
+ }
+
+ }
+
+ /**
+ * Checks if the scroll view is currently active.
+ */
+ isActive() {
+
+ return this.active;
+
+ }
+
+ /**
+ * Renders the progress bar component.
+ */
+ createProgressBar() {
+
+ this.progressBar = document.createElement( 'div' );
+ this.progressBar.className = 'scrollbar';
+
+ this.progressBarInner = document.createElement( 'div' );
+ this.progressBarInner.className = 'scrollbar-inner';
+ this.progressBar.appendChild( this.progressBarInner );
+
+ this.progressBarPlayhead = document.createElement( 'div' );
+ this.progressBarPlayhead.className = 'scrollbar-playhead';
+ this.progressBarInner.appendChild( this.progressBarPlayhead );
+
+ this.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );
+
+ const handleDocumentMouseMove = ( event ) => {
+
+ let progress = ( event.clientY - this.progressBarInner.getBoundingClientRect().top ) / this.progressBarHeight;
+ progress = Math.max( Math.min( progress, 1 ), 0 );
+
+ this.viewportElement.scrollTop = progress * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );
+
+ };
+
+ const handleDocumentMouseUp = ( event ) => {
+
+ this.draggingProgressBar = false;
+ this.showProgressBar();
+
+ document.removeEventListener( 'mousemove', handleDocumentMouseMove );
+ document.removeEventListener( 'mouseup', handleDocumentMouseUp );
+
+ };
+
+ const handleMouseDown = ( event ) => {
+
+ event.preventDefault();
+
+ this.draggingProgressBar = true;
+
+ document.addEventListener( 'mousemove', handleDocumentMouseMove );
+ document.addEventListener( 'mouseup', handleDocumentMouseUp );
+
+ handleDocumentMouseMove( event );
+
+ };
+
+ this.progressBarInner.addEventListener( 'mousedown', handleMouseDown );
+
+ }
+
+ removeProgressBar() {
+
+ if( this.progressBar ) {
+ this.progressBar.remove();
+ this.progressBar = null;
+ }
+
+ }
+
+ layout() {
+
+ if( this.isActive() ) {
+ this.syncPages();
+ this.syncScrollPosition();
+ }
+
+ }
+
+ /**
+ * Updates our pages to match the latest configuration and
+ * presentation size.
+ */
+ syncPages() {
+
+ const config = this.Reveal.getConfig();
+
+ const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
+ const scale = this.Reveal.getScale();
+ const useCompactLayout = config.scrollLayout === 'compact';
+
+ const viewportHeight = this.viewportElement.offsetHeight;
+ const compactHeight = slideSize.height * scale;
+ const pageHeight = useCompactLayout ? compactHeight : viewportHeight;
+
+ // The height that needs to be scrolled between scroll triggers
+ this.scrollTriggerHeight = useCompactLayout ? compactHeight : viewportHeight;
+
+ this.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );
+ this.viewportElement.style.scrollSnapType = typeof config.scrollSnap === 'string' ? `y ${config.scrollSnap}` : '';
+
+ // This will hold all scroll triggers used to show/hide slides
+ this.slideTriggers = [];
+
+ const pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.scroll-page' ) );
+
+ this.pages = pageElements.map( pageElement => {
+ const page = this.createPage({
+ pageElement,
+ slideElement: pageElement.querySelector( 'section' ),
+ stickyElement: pageElement.querySelector( '.scroll-page-sticky' ),
+ contentElement: pageElement.querySelector( '.scroll-page-content' ),
+ backgroundElement: pageElement.querySelector( '.slide-background' ),
+ autoAnimateElements: pageElement.querySelectorAll( '.scroll-auto-animate-page' ),
+ autoAnimatePages: []
+ });
+
+ page.pageElement.style.setProperty( '--slide-height', config.center === true ? 'auto' : slideSize.height + 'px' );
+
+ this.slideTriggers.push({
+ page: page,
+ activate: () => this.activatePage( page ),
+ deactivate: () => this.deactivatePage( page )
+ });
+
+ // Create scroll triggers that show/hide fragments
+ this.createFragmentTriggersForPage( page );
+
+ // Create scroll triggers for triggering auto-animate steps
+ if( page.autoAnimateElements.length > 0 ) {
+ this.createAutoAnimateTriggersForPage( page );
+ }
+
+ let totalScrollTriggerCount = Math.max( page.scrollTriggers.length - 1, 0 );
+
+ // Each auto-animate step may include its own scroll triggers
+ // for fragments, ensure we count those as well
+ totalScrollTriggerCount += page.autoAnimatePages.reduce( ( total, page ) => {
+ return total + Math.max( page.scrollTriggers.length - 1, 0 );
+ }, page.autoAnimatePages.length );
+
+ // Clean up from previous renders
+ page.pageElement.querySelectorAll( '.scroll-snap-point' ).forEach( el => el.remove() );
+
+ // Create snap points for all scroll triggers
+ // - Can't be absolute in FF
+ // - Can't be 0-height in Safari
+ // - Can't use snap-align on parent in Safari because then
+ // inner triggers won't work
+ for( let i = 0; i < totalScrollTriggerCount + 1; i++ ) {
+ const triggerStick = document.createElement( 'div' );
+ triggerStick.className = 'scroll-snap-point';
+ triggerStick.style.height = this.scrollTriggerHeight + 'px';
+ triggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';
+ page.pageElement.appendChild( triggerStick );
+
+ if( i === 0 ) {
+ triggerStick.style.marginTop = -this.scrollTriggerHeight + 'px';
+ }
+ }
+
+ // In the compact layout, only slides with scroll triggers cover the
+ // full viewport height. This helps avoid empty gaps before or after
+ // a sticky slide.
+ if( useCompactLayout && page.scrollTriggers.length > 0 ) {
+ page.pageHeight = viewportHeight;
+ page.pageElement.style.setProperty( '--page-height', viewportHeight + 'px' );
+ }
+ else {
+ page.pageHeight = pageHeight;
+ page.pageElement.style.removeProperty( '--page-height' );
+ }
+
+ // Add scroll padding based on how many scroll triggers we have
+ page.scrollPadding = this.scrollTriggerHeight * totalScrollTriggerCount;
+
+ // The total height including scrollable space
+ page.totalHeight = page.pageHeight + page.scrollPadding;
+
+ // This is used to pad the height of our page in CSS
+ page.pageElement.style.setProperty( '--page-scroll-padding', page.scrollPadding + 'px' );
+
+ // If this is a sticky page, stick it to the vertical center
+ if( totalScrollTriggerCount > 0 ) {
+ page.stickyElement.style.position = 'sticky';
+ page.stickyElement.style.top = Math.max( ( viewportHeight - page.pageHeight ) / 2, 0 ) + 'px';
+ }
+ else {
+ page.stickyElement.style.position = 'relative';
+ page.pageElement.style.scrollSnapAlign = page.pageHeight < viewportHeight ? 'center' : 'start';
+ }
+
+ return page;
+ } );
+
+ this.setTriggerRanges();
+
+ /*
+ console.log(this.slideTriggers.map( t => {
+ return {
+ range: `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`,
+ triggers: t.page.scrollTriggers.map( t => {
+ return `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`
+ }).join( ', ' ),
+ }
+ }))
+ */
+
+ this.viewportElement.setAttribute( 'data-scrollbar', config.scrollProgress );
+
+ if( config.scrollProgress && this.totalScrollTriggerCount > 1 ) {
+ // Create the progress bar if it doesn't already exist
+ if( !this.progressBar ) this.createProgressBar();
+
+ this.syncProgressBar();
+ }
+ else {
+ this.removeProgressBar();
+ }
+
+ }
+
+ /**
+ * Calculates and sets the scroll range for all of our scroll
+ * triggers.
+ */
+ setTriggerRanges() {
+
+ // Calculate the total number of scroll triggers
+ this.totalScrollTriggerCount = this.slideTriggers.reduce( ( total, trigger ) => {
+ return total + Math.max( trigger.page.scrollTriggers.length, 1 );
+ }, 0 );
+
+ let rangeStart = 0;
+
+ // Calculate the scroll range of each scroll trigger on a scale
+ // of 0-1
+ this.slideTriggers.forEach( ( trigger, i ) => {
+ trigger.range = [
+ rangeStart,
+ rangeStart + Math.max( trigger.page.scrollTriggers.length, 1 ) / this.totalScrollTriggerCount
+ ];
+
+ const scrollTriggerSegmentSize = ( trigger.range[1] - trigger.range[0] ) / trigger.page.scrollTriggers.length;
+ // Set the range for each inner scroll trigger
+ trigger.page.scrollTriggers.forEach( ( scrollTrigger, i ) => {
+ scrollTrigger.range = [
+ rangeStart + i * scrollTriggerSegmentSize,
+ rangeStart + ( i + 1 ) * scrollTriggerSegmentSize
+ ];
+ } );
+
+ rangeStart = trigger.range[1];
+ } );
+
+ }
+
+ /**
+ * Creates one scroll trigger for each fragments in the given page.
+ *
+ * @param {*} page
+ */
+ createFragmentTriggersForPage( page, slideElement ) {
+
+ slideElement = slideElement || page.slideElement;
+
+ // Each fragment 'group' is an array containing one or more
+ // fragments. Multiple fragments that appear at the same time
+ // are part of the same group.
+ const fragmentGroups = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment' ), true );
+
+ // Create scroll triggers that show/hide fragments
+ if( fragmentGroups.length ) {
+ page.fragments = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment:not(.disabled)' ) );
+ page.scrollTriggers.push(
+ // Trigger for the initial state with no fragments visible
+ {
+ activate: () => {
+ this.Reveal.fragments.update( -1, page.fragments, slideElement );
+ }
+ }
+ );
+
+ // Triggers for each fragment group
+ fragmentGroups.forEach( ( fragments, i ) => {
+ page.scrollTriggers.push({
+ activate: () => {
+ this.Reveal.fragments.update( i, page.fragments, slideElement );
+ }
+ });
+ } );
+ }
+
+
+ return page.scrollTriggers.length;
+
+ }
+
+ /**
+ * Creates scroll triggers for the auto-animate steps in the
+ * given page.
+ *
+ * @param {*} page
+ */
+ createAutoAnimateTriggersForPage( page ) {
+
+ if( page.autoAnimateElements.length > 0 ) {
+
+ // Triggers for each subsequent auto-animate slide
+ this.slideTriggers.push( ...Array.from( page.autoAnimateElements ).map( ( autoAnimateElement, i ) => {
+ let autoAnimatePage = this.createPage({
+ slideElement: autoAnimateElement.querySelector( 'section' ),
+ contentElement: autoAnimateElement,
+ backgroundElement: autoAnimateElement.querySelector( '.slide-background' )
+ });
+
+ // Create fragment scroll triggers for the auto-animate slide
+ this.createFragmentTriggersForPage( autoAnimatePage, autoAnimatePage.slideElement );
+
+ page.autoAnimatePages.push( autoAnimatePage );
+
+ // Return our slide trigger
+ return {
+ page: autoAnimatePage,
+ activate: () => this.activatePage( autoAnimatePage ),
+ deactivate: () => this.deactivatePage( autoAnimatePage )
+ };
+ }));
+ }
+
+ }
+
+ /**
+ * Helper method for creating a page definition and adding
+ * required fields. A "page" is a slide or auto-animate step.
+ */
+ createPage( page ) {
+
+ page.scrollTriggers = [];
+ page.indexh = parseInt( page.slideElement.getAttribute( 'data-index-h' ), 10 );
+ page.indexv = parseInt( page.slideElement.getAttribute( 'data-index-v' ), 10 );
+
+ return page;
+
+ }
+
+ /**
+ * Rerenders progress bar segments so that they match the current
+ * reveal.js config and size.
+ */
+ syncProgressBar() {
+
+ this.progressBarInner.querySelectorAll( '.scrollbar-slide' ).forEach( slide => slide.remove() );
+
+ const scrollHeight = this.viewportElement.scrollHeight;
+ const viewportHeight = this.viewportElement.offsetHeight;
+ const viewportHeightFactor = viewportHeight / scrollHeight;
+
+ this.progressBarHeight = this.progressBarInner.offsetHeight;
+ this.playheadHeight = Math.max( viewportHeightFactor * this.progressBarHeight, MIN_PLAYHEAD_HEIGHT );
+ this.progressBarScrollableHeight = this.progressBarHeight - this.playheadHeight;
+
+ const progressSegmentHeight = viewportHeight / scrollHeight * this.progressBarHeight;
+ const spacing = Math.min( progressSegmentHeight / 8, MAX_PROGRESS_SPACING );
+
+ this.progressBarPlayhead.style.height = this.playheadHeight - spacing + 'px';
+
+ // Don't show individual segments if they're too small
+ if( progressSegmentHeight > MIN_PROGRESS_SEGMENT_HEIGHT ) {
+
+ this.slideTriggers.forEach( slideTrigger => {
+
+ const { page } = slideTrigger;
+
+ // Visual representation of a slide
+ page.progressBarSlide = document.createElement( 'div' );
+ page.progressBarSlide.className = 'scrollbar-slide';
+ page.progressBarSlide.style.top = slideTrigger.range[0] * this.progressBarHeight + 'px';
+ page.progressBarSlide.style.height = ( slideTrigger.range[1] - slideTrigger.range[0] ) * this.progressBarHeight - spacing + 'px';
+ page.progressBarSlide.classList.toggle( 'has-triggers', page.scrollTriggers.length > 0 );
+ this.progressBarInner.appendChild( page.progressBarSlide );
+
+ // Visual representations of each scroll trigger
+ page.scrollTriggerElements = page.scrollTriggers.map( ( trigger, i ) => {
+
+ const triggerElement = document.createElement( 'div' );
+ triggerElement.className = 'scrollbar-trigger';
+ triggerElement.style.top = ( trigger.range[0] - slideTrigger.range[0] ) * this.progressBarHeight + 'px';
+ triggerElement.style.height = ( trigger.range[1] - trigger.range[0] ) * this.progressBarHeight - spacing + 'px';
+ page.progressBarSlide.appendChild( triggerElement );
+
+ if( i === 0 ) triggerElement.style.display = 'none';
+
+ return triggerElement;
+
+ } );
+
+ } );
+
+ }
+ else {
+
+ this.pages.forEach( page => page.progressBarSlide = null );
+
+ }
+
+ }
+
+ /**
+ * Reads the current scroll position and updates our active
+ * trigger states accordingly.
+ */
+ syncScrollPosition() {
+
+ const viewportHeight = this.viewportElement.offsetHeight;
+ const viewportHeightFactor = viewportHeight / this.viewportElement.scrollHeight;
+
+ const scrollTop = this.viewportElement.scrollTop;
+ const scrollHeight = this.viewportElement.scrollHeight - viewportHeight
+ const scrollProgress = Math.max( Math.min( scrollTop / scrollHeight, 1 ), 0 );
+ const scrollProgressMid = Math.max( Math.min( ( scrollTop + viewportHeight / 2 ) / this.viewportElement.scrollHeight, 1 ), 0 );
+
+ let activePage;
+
+ this.slideTriggers.forEach( ( trigger ) => {
+ const { page } = trigger;
+
+ const shouldPreload = scrollProgress >= trigger.range[0] - viewportHeightFactor*2 &&
+ scrollProgress <= trigger.range[1] + viewportHeightFactor*2;
+
+ // Load slides that are within the preload range
+ if( shouldPreload && !page.loaded ) {
+ page.loaded = true;
+ this.Reveal.slideContent.load( page.slideElement );
+ }
+ else if( page.loaded ) {
+ page.loaded = false;
+ this.Reveal.slideContent.unload( page.slideElement );
+ }
+
+ // If we're within this trigger range, activate it
+ if( scrollProgress >= trigger.range[0] && scrollProgress <= trigger.range[1] ) {
+ this.activateTrigger( trigger );
+ activePage = trigger.page;
+ }
+ // .. otherwise deactivate
+ else if( trigger.active ) {
+ this.deactivateTrigger( trigger );
+ }
+ } );
+
+ // Each page can have its own scroll triggers, check if any of those
+ // need to be activated/deactivated
+ if( activePage ) {
+ activePage.scrollTriggers.forEach( ( trigger ) => {
+ if( scrollProgressMid >= trigger.range[0] && scrollProgressMid <= trigger.range[1] ) {
+ this.activateTrigger( trigger );
+ }
+ else if( trigger.active ) {
+ this.deactivateTrigger( trigger );
+ }
+ } );
+ }
+
+ // Update our visual progress indication
+ this.setProgressBarValue( scrollTop / ( this.viewportElement.scrollHeight - viewportHeight ) );
+
+ }
+
+ /**
+ * Moves the progress bar playhead to the specified position.
+ *
+ * @param {number} progress 0-1
+ */
+ setProgressBarValue( progress ) {
+
+ if( this.progressBar ) {
+
+ this.progressBarPlayhead.style.transform = `translateY(${progress * this.progressBarScrollableHeight}px)`;
+
+ this.getAllPages()
+ .filter( page => page.progressBarSlide )
+ .forEach( ( page ) => {
+ page.progressBarSlide.classList.toggle( 'active', page.active === true );
+
+ page.scrollTriggers.forEach( ( trigger, i ) => {
+ page.scrollTriggerElements[i].classList.toggle( 'active', page.active === true && trigger.active === true );
+ } );
+ } );
+
+ this.showProgressBar();
+
+ }
+
+ }
+
+ /**
+ * Show the progress bar and, if configured, automatically hide
+ * it after a delay.
+ */
+ showProgressBar() {
+
+ this.progressBar.classList.add( 'visible' );
+
+ clearTimeout( this.hideProgressBarTimeout );
+
+ if( this.Reveal.getConfig().scrollProgress === 'auto' && !this.draggingProgressBar ) {
+
+ this.hideProgressBarTimeout = setTimeout( () => {
+ if( this.progressBar ) {
+ this.progressBar.classList.remove( 'visible' );
+ }
+ }, HIDE_SCROLLBAR_TIMEOUT );
+
+ }
+
+ }
+
+ /**
+ * Scroll to the previous page.
+ */
+ prev() {
+
+ this.viewportElement.scrollTop -= this.scrollTriggerHeight;
+
+ }
+
+ /**
+ * Scroll to the next page.
+ */
+ next() {
+
+ this.viewportElement.scrollTop += this.scrollTriggerHeight;
+
+ }
+
+ /**
+ * Scrolls the given slide element into view.
+ *
+ * @param {HTMLElement} slideElement
+ */
+ scrollToSlide( slideElement ) {
+
+ // If the scroll view isn't active yet, queue this action
+ if( !this.active ) {
+ this.activatedCallbacks.push( () => this.scrollToSlide( slideElement ) );
+ }
+ else {
+ // Find the trigger for this slide
+ const trigger = this.getScrollTriggerBySlide( slideElement );
+
+ if( trigger ) {
+ // Use the trigger's range to calculate the scroll position
+ this.viewportElement.scrollTop = trigger.range[0] * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );
+ }
+ }
+
+ }
+
+ /**
+ * Persists the current scroll position to session storage
+ * so that it can be restored.
+ */
+ storeScrollPosition() {
+
+ clearTimeout( this.storeScrollPositionTimeout );
+
+ this.storeScrollPositionTimeout = setTimeout( () => {
+ sessionStorage.setItem( 'reveal-scroll-top', this.viewportElement.scrollTop );
+ sessionStorage.setItem( 'reveal-scroll-origin', location.origin + location.pathname );
+
+ this.storeScrollPositionTimeout = null;
+ }, 50 );
+
+ }
+
+ /**
+ * Restores the scroll position when a deck is reloader.
+ */
+ restoreScrollPosition() {
+
+ const scrollPosition = sessionStorage.getItem( 'reveal-scroll-top' );
+ const scrollOrigin = sessionStorage.getItem( 'reveal-scroll-origin' );
+
+ if( scrollPosition && scrollOrigin === location.origin + location.pathname ) {
+ this.viewportElement.scrollTop = parseInt( scrollPosition, 10 );
+ }
+
+ }
+
+ /**
+ * Activates the given page and starts its embedded content
+ * if there is any.
+ *
+ * @param {object} page
+ */
+ activatePage( page ) {
+
+ if( !page.active ) {
+
+ page.active = true;
+
+ const { slideElement, backgroundElement, contentElement, indexh, indexv } = page;
+
+ contentElement.style.display = 'block';
+
+ slideElement.classList.add( 'present' );
+
+ if( backgroundElement ) {
+ backgroundElement.classList.add( 'present' );
+ }
+
+ this.Reveal.setCurrentScrollPage( slideElement, indexh, indexv );
+ this.Reveal.backgrounds.bubbleSlideContrastClassToElement( slideElement, this.viewportElement );
+
+ // If this page is part of an auto-animation there will be one
+ // content element per auto-animated page. We need to show the
+ // current page and hide all others.
+ Array.from( contentElement.parentNode.querySelectorAll( '.scroll-page-content' ) ).forEach( sibling => {
+ if( sibling !== contentElement ) {
+ sibling.style.display = 'none';
+ }
+ });
+
+ }
+
+ }
+
+ /**
+ * Deactivates the page after it has been visible.
+ *
+ * @param {object} page
+ */
+ deactivatePage( page ) {
+
+ if( page.active ) {
+
+ page.active = false;
+ if( page.slideElement ) page.slideElement.classList.remove( 'present' );
+ if( page.backgroundElement ) page.backgroundElement.classList.remove( 'present' );
+
+ }
+
+ }
+
+ activateTrigger( trigger ) {
+
+ if( !trigger.active ) {
+ trigger.active = true;
+ trigger.activate();
+ }
+
+ }
+
+ deactivateTrigger( trigger ) {
+
+ if( trigger.active ) {
+ trigger.active = false;
+
+ if( trigger.deactivate ) {
+ trigger.deactivate();
+ }
+ }
+
+ }
+
+ /**
+ * Retrieve a slide by its original h/v index (i.e. the indices the
+ * slide had before being linearized).
+ *
+ * @param {number} h
+ * @param {number} v
+ * @returns {HTMLElement}
+ */
+ getSlideByIndices( h, v ) {
+
+ const page = this.getAllPages().find( page => {
+ return page.indexh === h && page.indexv === v;
+ } );
+
+ return page ? page.slideElement : null;
+
+ }
+
+ /**
+ * Retrieve a list of all scroll triggers for the given slide
+ * DOM element.
+ *
+ * @param {HTMLElement} slide
+ * @returns {Array}
+ */
+ getScrollTriggerBySlide( slide ) {
+
+ return this.slideTriggers.find( trigger => trigger.page.slideElement === slide );
+
+ }
+
+ /**
+ * Get a list of all pages in the scroll view. This includes
+ * both top-level slides and auto-animate steps.
+ *
+ * @returns {Array}
+ */
+ getAllPages() {
+
+ return this.pages.flatMap( page => [page, ...(page.autoAnimatePages || [])] );
+
+ }
+
+ onScroll() {
+
+ this.syncScrollPosition();
+ this.storeScrollPosition();
+
+ }
+
+ get viewportElement() {
+
+ return this.Reveal.getViewportElement();
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/slidecontent.js b/inst/reveal.js-5.1.0/js/controllers/slidecontent.js
new file mode 100644
index 0000000..2a24325
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/slidecontent.js
@@ -0,0 +1,489 @@
+import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'
+import { isMobile } from '../utils/device.js'
+
+import fitty from 'fitty';
+
+/**
+ * Handles loading, unloading and playback of slide
+ * content such as images, videos and iframes.
+ */
+export default class SlideContent {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ this.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );
+
+ }
+
+ /**
+ * Should the given element be preloaded?
+ * Decides based on local element attributes and global config.
+ *
+ * @param {HTMLElement} element
+ */
+ shouldPreload( element ) {
+
+ if( this.Reveal.isScrollView() ) {
+ return true;
+ }
+
+ // Prefer an explicit global preload setting
+ let preload = this.Reveal.getConfig().preloadIframes;
+
+ // If no global setting is available, fall back on the element's
+ // own preload setting
+ if( typeof preload !== 'boolean' ) {
+ preload = element.hasAttribute( 'data-preload' );
+ }
+
+ return preload;
+ }
+
+ /**
+ * Called when the given slide is within the configured view
+ * distance. Shows the slide element and loads any content
+ * that is set to load lazily (data-src).
+ *
+ * @param {HTMLElement} slide Slide to show
+ */
+ load( slide, options = {} ) {
+
+ // Show the slide element
+ slide.style.display = this.Reveal.getConfig().display;
+
+ // Media elements with data-src attributes
+ queryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {
+ if( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {
+ element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
+ element.setAttribute( 'data-lazy-loaded', '' );
+ element.removeAttribute( 'data-src' );
+ }
+ } );
+
+ // Media elements with <source> children
+ queryAll( slide, 'video, audio' ).forEach( media => {
+ let sources = 0;
+
+ queryAll( media, 'source[data-src]' ).forEach( source => {
+ source.setAttribute( 'src', source.getAttribute( 'data-src' ) );
+ source.removeAttribute( 'data-src' );
+ source.setAttribute( 'data-lazy-loaded', '' );
+ sources += 1;
+ } );
+
+ // Enable inline video playback in mobile Safari
+ if( isMobile && media.tagName === 'VIDEO' ) {
+ media.setAttribute( 'playsinline', '' );
+ }
+
+ // If we rewrote sources for this video/audio element, we need
+ // to manually tell it to load from its new origin
+ if( sources > 0 ) {
+ media.load();
+ }
+ } );
+
+
+ // Show the corresponding background element
+ let background = slide.slideBackgroundElement;
+ if( background ) {
+ background.style.display = 'block';
+
+ let backgroundContent = slide.slideBackgroundContentElement;
+ let backgroundIframe = slide.getAttribute( 'data-background-iframe' );
+
+ // If the background contains media, load it
+ if( background.hasAttribute( 'data-loaded' ) === false ) {
+ background.setAttribute( 'data-loaded', 'true' );
+
+ let backgroundImage = slide.getAttribute( 'data-background-image' ),
+ backgroundVideo = slide.getAttribute( 'data-background-video' ),
+ backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),
+ backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );
+
+ // Images
+ if( backgroundImage ) {
+ // base64
+ if( /^data:/.test( backgroundImage.trim() ) ) {
+ backgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`;
+ }
+ // URL(s)
+ else {
+ backgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {
+ // Decode URL(s) that are already encoded first
+ let decoded = decodeURI(background.trim());
+ return `url(${encodeRFC3986URI(decoded)})`;
+ }).join( ',' );
+ }
+ }
+ // Videos
+ else if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {
+ let video = document.createElement( 'video' );
+
+ if( backgroundVideoLoop ) {
+ video.setAttribute( 'loop', '' );
+ }
+
+ if( backgroundVideoMuted ) {
+ video.muted = true;
+ }
+
+ // Enable inline playback in mobile Safari
+ //
+ // Mute is required for video to play when using
+ // swipe gestures to navigate since they don't
+ // count as direct user actions :'(
+ if( isMobile ) {
+ video.muted = true;
+ video.setAttribute( 'playsinline', '' );
+ }
+
+ // Support comma separated lists of video sources
+ backgroundVideo.split( ',' ).forEach( source => {
+ const sourceElement = document.createElement( 'source' );
+ sourceElement.setAttribute( 'src', source );
+
+ let type = getMimeTypeFromFile( source );
+ if( type ) {
+ sourceElement.setAttribute( 'type', type );
+ }
+
+ video.appendChild( sourceElement );
+ } );
+
+ backgroundContent.appendChild( video );
+ }
+ // Iframes
+ else if( backgroundIframe && options.excludeIframes !== true ) {
+ let iframe = document.createElement( 'iframe' );
+ iframe.setAttribute( 'allowfullscreen', '' );
+ iframe.setAttribute( 'mozallowfullscreen', '' );
+ iframe.setAttribute( 'webkitallowfullscreen', '' );
+ iframe.setAttribute( 'allow', 'autoplay' );
+
+ iframe.setAttribute( 'data-src', backgroundIframe );
+
+ iframe.style.width = '100%';
+ iframe.style.height = '100%';
+ iframe.style.maxHeight = '100%';
+ iframe.style.maxWidth = '100%';
+
+ backgroundContent.appendChild( iframe );
+ }
+ }
+
+ // Start loading preloadable iframes
+ let backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );
+ if( backgroundIframeElement ) {
+
+ // Check if this iframe is eligible to be preloaded
+ if( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {
+ if( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {
+ backgroundIframeElement.setAttribute( 'src', backgroundIframe );
+ }
+ }
+
+ }
+
+ }
+
+ this.layout( slide );
+
+ }
+
+ /**
+ * Applies JS-dependent layout helpers for the scope.
+ */
+ layout( scopeElement ) {
+
+ // Autosize text with the r-fit-text class based on the
+ // size of its container. This needs to happen after the
+ // slide is visible in order to measure the text.
+ Array.from( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => {
+ fitty( element, {
+ minSize: 24,
+ maxSize: this.Reveal.getConfig().height * 0.8,
+ observeMutations: false,
+ observeWindow: false
+ } );
+ } );
+
+ }
+
+ /**
+ * Unloads and hides the given slide. This is called when the
+ * slide is moved outside of the configured view distance.
+ *
+ * @param {HTMLElement} slide
+ */
+ unload( slide ) {
+
+ // Hide the slide element
+ slide.style.display = 'none';
+
+ // Hide the corresponding background element
+ let background = this.Reveal.getSlideBackground( slide );
+ if( background ) {
+ background.style.display = 'none';
+
+ // Unload any background iframes
+ queryAll( background, 'iframe[src]' ).forEach( element => {
+ element.removeAttribute( 'src' );
+ } );
+ }
+
+ // Reset lazy-loaded media elements with src attributes
+ queryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => {
+ element.setAttribute( 'data-src', element.getAttribute( 'src' ) );
+ element.removeAttribute( 'src' );
+ } );
+
+ // Reset lazy-loaded media elements with <source> children
+ queryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => {
+ source.setAttribute( 'data-src', source.getAttribute( 'src' ) );
+ source.removeAttribute( 'src' );
+ } );
+
+ }
+
+ /**
+ * Enforces origin-specific format rules for embedded media.
+ */
+ formatEmbeddedContent() {
+
+ let _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {
+ queryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ).forEach( el => {
+ let src = el.getAttribute( sourceAttribute );
+ if( src && src.indexOf( param ) === -1 ) {
+ el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param );
+ }
+ });
+ };
+
+ // YouTube frames must include "?enablejsapi=1"
+ _appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );
+ _appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );
+
+ // Vimeo frames must include "?api=1"
+ _appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );
+ _appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );
+
+ }
+
+ /**
+ * Start playback of any embedded content inside of
+ * the given element.
+ *
+ * @param {HTMLElement} element
+ */
+ startEmbeddedContent( element ) {
+
+ if( element && !this.Reveal.isSpeakerNotes() ) {
+
+ // Restart GIFs
+ queryAll( element, 'img[src$=".gif"]' ).forEach( el => {
+ // Setting the same unchanged source like this was confirmed
+ // to work in Chrome, FF & Safari
+ el.setAttribute( 'src', el.getAttribute( 'src' ) );
+ } );
+
+ // HTML5 media elements
+ queryAll( element, 'video, audio' ).forEach( el => {
+ if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+ return;
+ }
+
+ // Prefer an explicit global autoplay setting
+ let autoplay = this.Reveal.getConfig().autoPlayMedia;
+
+ // If no global setting is available, fall back on the element's
+ // own autoplay setting
+ if( typeof autoplay !== 'boolean' ) {
+ autoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );
+ }
+
+ if( autoplay && typeof el.play === 'function' ) {
+
+ // If the media is ready, start playback
+ if( el.readyState > 1 ) {
+ this.startEmbeddedMedia( { target: el } );
+ }
+ // Mobile devices never fire a loaded event so instead
+ // of waiting, we initiate playback
+ else if( isMobile ) {
+ let promise = el.play();
+
+ // If autoplay does not work, ensure that the controls are visible so
+ // that the viewer can start the media on their own
+ if( promise && typeof promise.catch === 'function' && el.controls === false ) {
+ promise.catch( () => {
+ el.controls = true;
+
+ // Once the video does start playing, hide the controls again
+ el.addEventListener( 'play', () => {
+ el.controls = false;
+ } );
+ } );
+ }
+ }
+ // If the media isn't loaded, wait before playing
+ else {
+ el.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes
+ el.addEventListener( 'loadeddata', this.startEmbeddedMedia );
+ }
+
+ }
+ } );
+
+ // Normal iframes
+ queryAll( element, 'iframe[src]' ).forEach( el => {
+ if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+ return;
+ }
+
+ this.startEmbeddedIframe( { target: el } );
+ } );
+
+ // Lazy loading iframes
+ queryAll( element, 'iframe[data-src]' ).forEach( el => {
+ if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+ return;
+ }
+
+ if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
+ el.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes
+ el.addEventListener( 'load', this.startEmbeddedIframe );
+ el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
+ }
+ } );
+
+ }
+
+ }
+
+ /**
+ * Starts playing an embedded video/audio element after
+ * it has finished loading.
+ *
+ * @param {object} event
+ */
+ startEmbeddedMedia( event ) {
+
+ let isAttachedToDOM = !!closest( event.target, 'html' ),
+ isVisible = !!closest( event.target, '.present' );
+
+ if( isAttachedToDOM && isVisible ) {
+ // Don't restart if media is already playing
+ if( event.target.paused || event.target.ended ) {
+ event.target.currentTime = 0;
+ event.target.play();
+ }
+ }
+
+ event.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );
+
+ }
+
+ /**
+ * "Starts" the content of an embedded iframe using the
+ * postMessage API.
+ *
+ * @param {object} event
+ */
+ startEmbeddedIframe( event ) {
+
+ let iframe = event.target;
+
+ if( iframe && iframe.contentWindow ) {
+
+ let isAttachedToDOM = !!closest( event.target, 'html' ),
+ isVisible = !!closest( event.target, '.present' );
+
+ if( isAttachedToDOM && isVisible ) {
+
+ // Prefer an explicit global autoplay setting
+ let autoplay = this.Reveal.getConfig().autoPlayMedia;
+
+ // If no global setting is available, fall back on the element's
+ // own autoplay setting
+ if( typeof autoplay !== 'boolean' ) {
+ autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );
+ }
+
+ // YouTube postMessage API
+ if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
+ iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
+ }
+ // Vimeo postMessage API
+ else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
+ iframe.contentWindow.postMessage( '{"method":"play"}', '*' );
+ }
+ // Generic postMessage API
+ else {
+ iframe.contentWindow.postMessage( 'slide:start', '*' );
+ }
+
+ }
+
+ }
+
+ }
+
+ /**
+ * Stop playback of any embedded content inside of
+ * the targeted slide.
+ *
+ * @param {HTMLElement} element
+ */
+ stopEmbeddedContent( element, options = {} ) {
+
+ options = extend( {
+ // Defaults
+ unloadIframes: true
+ }, options );
+
+ if( element && element.parentNode ) {
+ // HTML5 media elements
+ queryAll( element, 'video, audio' ).forEach( el => {
+ if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
+ el.setAttribute('data-paused-by-reveal', '');
+ el.pause();
+ }
+ } );
+
+ // Generic postMessage API for non-lazy loaded iframes
+ queryAll( element, 'iframe' ).forEach( el => {
+ if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
+ el.removeEventListener( 'load', this.startEmbeddedIframe );
+ });
+
+ // YouTube postMessage API
+ queryAll( element, 'iframe[src*="youtube.com/embed/"]' ).forEach( el => {
+ if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
+ el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
+ }
+ });
+
+ // Vimeo postMessage API
+ queryAll( element, 'iframe[src*="player.vimeo.com/"]' ).forEach( el => {
+ if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
+ el.contentWindow.postMessage( '{"method":"pause"}', '*' );
+ }
+ });
+
+ if( options.unloadIframes === true ) {
+ // Unload lazy-loaded iframes
+ queryAll( element, 'iframe[data-src]' ).forEach( el => {
+ // Only removing the src doesn't actually unload the frame
+ // in all browsers (Firefox) so we set it to blank first
+ el.setAttribute( 'src', 'about:blank' );
+ el.removeAttribute( 'src' );
+ } );
+ }
+ }
+
+ }
+
+}
diff --git a/inst/reveal.js-5.1.0/js/controllers/slidenumber.js b/inst/reveal.js-5.1.0/js/controllers/slidenumber.js
new file mode 100644
index 0000000..e213e29
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/slidenumber.js
@@ -0,0 +1,139 @@
+import {
+ SLIDE_NUMBER_FORMAT_CURRENT,
+ SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL,
+ SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL,
+ SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL
+} from "../utils/constants";
+
+/**
+ * Handles the display of reveal.js' optional slide number.
+ */
+export default class SlideNumber {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ }
+
+ render() {
+
+ this.element = document.createElement( 'div' );
+ this.element.className = 'slide-number';
+ this.Reveal.getRevealElement().appendChild( this.element );
+
+ }
+
+ /**
+ * Called when the reveal.js config is updated.
+ */
+ configure( config, oldConfig ) {
+
+ let slideNumberDisplay = 'none';
+ if( config.slideNumber && !this.Reveal.isPrintView() ) {
+ if( config.showSlideNumber === 'all' ) {
+ slideNumberDisplay = 'block';
+ }
+ else if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) {
+ slideNumberDisplay = 'block';
+ }
+ }
+
+ this.element.style.display = slideNumberDisplay;
+
+ }
+
+ /**
+ * Updates the slide number to match the current slide.
+ */
+ update() {
+
+ // Update slide number if enabled
+ if( this.Reveal.getConfig().slideNumber && this.element ) {
+ this.element.innerHTML = this.getSlideNumber();
+ }
+
+ }
+
+ /**
+ * Returns the HTML string corresponding to the current slide
+ * number, including formatting.
+ */
+ getSlideNumber( slide = this.Reveal.getCurrentSlide() ) {
+
+ let config = this.Reveal.getConfig();
+ let value;
+ let format = SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL;
+
+ if ( typeof config.slideNumber === 'function' ) {
+ value = config.slideNumber( slide );
+ } else {
+ // Check if a custom number format is available
+ if( typeof config.slideNumber === 'string' ) {
+ format = config.slideNumber;
+ }
+
+ // If there are ONLY vertical slides in this deck, always use
+ // a flattened slide number
+ if( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {
+ format = SLIDE_NUMBER_FORMAT_CURRENT;
+ }
+
+ // Offset the current slide number by 1 to make it 1-indexed
+ let horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1;
+
+ value = [];
+ switch( format ) {
+ case SLIDE_NUMBER_FORMAT_CURRENT:
+ value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );
+ break;
+ case SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL:
+ value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );
+ break;
+ default:
+ let indices = this.Reveal.getIndices( slide );
+ value.push( indices.h + horizontalOffset );
+ let sep = format === SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL ? '/' : '.';
+ if( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );
+ }
+ }
+
+ let url = '#' + this.Reveal.location.getHash( slide );
+ return this.formatNumber( value[0], value[1], value[2], url );
+
+ }
+
+ /**
+ * Applies HTML formatting to a slide number before it's
+ * written to the DOM.
+ *
+ * @param {number} a Current slide
+ * @param {string} delimiter Character to separate slide numbers
+ * @param {(number|*)} b Total slides
+ * @param {HTMLElement} [url='#'+locationHash()] The url to link to
+ * @return {string} HTML string fragment
+ */
+ formatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) {
+
+ if( typeof b === 'number' && !isNaN( b ) ) {
+ return `<a href="${url}">
+ <span class="slide-number-a">${a}</span>
+ <span class="slide-number-delimiter">${delimiter}</span>
+ <span class="slide-number-b">${b}</span>
+ </a>`;
+ }
+ else {
+ return `<a href="${url}">
+ <span class="slide-number-a">${a}</span>
+ </a>`;
+ }
+
+ }
+
+ destroy() {
+
+ this.element.remove();
+
+ }
+
+}
\ No newline at end of file
diff --git a/inst/reveal.js-5.1.0/js/controllers/touch.js b/inst/reveal.js-5.1.0/js/controllers/touch.js
new file mode 100644
index 0000000..7078cf2
--- /dev/null
+++ b/inst/reveal.js-5.1.0/js/controllers/touch.js
@@ -0,0 +1,265 @@
+import { isAndroid } from '../utils/device.js'
+import { matches } from '../utils/util.js'
+
+const SWIPE_THRESHOLD = 40;
+
+/**
+ * Controls all touch interactions and navigations for
+ * a presentation.
+ */
+export default class Touch {
+
+ constructor( Reveal ) {
+
+ this.Reveal = Reveal;
+
+ // Holds information about the currently ongoing touch interaction
+ this.touchStartX = 0;
+ this.touchStartY = 0;
+ this.touchStartCount = 0;
+ this.touchCaptured = false;
+
+ this.onPointerDown = this.onPointerDown.bind( this );
+ this.onPointerMove = this.onPointerMove.bind( this );
+ this.onPointerUp = this.onPointerUp.bind( this );
+ this.onTouchStart = this.onTouchStart.bind( this );
+ this.onTouchMove = this.onTouchMove.bind( this );
+ this.onTouchEnd = this.onTouchEnd.bind( this );
+
+ }
+
+ /**
+ *
+ */
+ bind() {
+
+ let revealElement = this.Reveal.getRevealElement();
+
+ if( 'onpointerdown' in window ) {
+ // Use W3C pointer events
+ revealElement.addEventListener( 'pointerdown', this.onPointerDown, false );
+ revealElement.addEventListener( 'pointermove', this.onPointerMove, false );
+ revealElement.addEventListener( 'pointerup', this.onPointerUp, false );
+ }
+ else if( window.navigator.msPointerEnabled ) {
+ // IE 10 uses prefixed version of pointer events
+ revealElement.addEventListener( 'MSPointerDown', this.onPointerDown, false );
+ revealElement.addEventListener( 'MSPointerMove', this.onPointerMove, false );
+ revealElement.addEventListener( 'MSPointerUp', this.onPointerUp, false );
+ }
+ else {
+ // Fall back to touch events
+ revealElement.addEventListener( 'touchstart', this.onTouchStart, false );
+ revealElement.addEventListener( 'touchmove', this.onTouchMove, false );
+ revealElement.addEventListener( 'touchend', this.onTouchEnd, false );
+ }
+
+ }
+
+ /**
+ *
+ */
+ unbind() {
+
+ let revealElement = this.Reveal.getRevealElement();
+
+ revealElement.removeEventListener( 'pointerdown', this.onPointerDown, false );
+ revealElement.removeEventListener( 'pointermove', this.onPointerMove, false );
+ revealElement.removeEventListener( 'pointerup', this.onPointerUp, false );
+
+ revealElement.removeEventListener( 'MSPointerDown', this.onPointerDown, false );
+ revealElement.removeEventListener( 'MSPointerMove', this.onPointerMove, false );
+ revealElement.removeEventListener( 'MSPointerUp', this.onPointerUp, false );
+
+ revealElement.removeEventListener( 'touchstart', this.onTouchStart, false );
+ revealElement.removeEventListener( 'touchmove', this.onTouchMove, false );
+ revealElement.removeEventListener( 'touchend', this.onTouchEnd, false );
+
+ }
+
+ /**
+ * Checks if the target element prevents the triggering of
+ * swipe navigation.
+ */
+ isSwipePrevented( target ) {
+
+ // Prevent accidental swipes when scrubbing timelines
+ if( matches( target, 'video[controls], audio[controls]' ) ) return true;
+
+ while( target && typeof target.hasAttribute === 'function' ) {
+ if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
+ target = target.parentNode;
+ }
+
+ return false;
+
+ }
+
+ /**
+ * Handler for the 'touchstart' event, enables support for
+ * swipe and pinch gestures.
+ *
+ * @param {object} event
+ */
+ onTouchStart( event ) {
+
+ this.touchCaptured = false;
+
+ if( this.isSwipePrevented( event.target ) ) return true;
+
+ this.touchStartX = event.touches[0].clientX;
+ this.touchStartY = event.touches[0].clientY;
+ this.touchStartCount = event.touches.length;
+
+ }
+
+ /**
+ * Handler for the 'touchmove' event.
+ *
+ * @param {object} event
+ */
+ onTouchMove( event ) {
+
+ if( this.isSwipePrevented( event.target ) ) return true;
+
+ let config = this.Reveal.getConfig();
+
+ // Each touch should only trigger one action
+ if( !this.touchCaptured ) {
+ this.Reveal.onUserInput( event );
+
+ let currentX = event.touches[0].clientX;
+ let currentY = event.touches[0].clientY;
+
+ // There was only one touch point, look for a swipe
+ if( event.touches.length === 1 && this.touchStartCount !== 2 ) {
+
+ let availableRoutes = this.Reveal.availableRoutes({ includeFragments: true });
+
+ let deltaX = currentX - this.touchStartX,
+ deltaY = currentY - this.touchStartY;
+
+ if( deltaX > SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
+ this.touchCaptured = true;
+ if( config.navigationMode === 'linear' ) {
+ if( config.rtl ) {
+ this.Reveal.next();
+ }
+ else {
+ this.Reveal.prev();
+ }
+ }
+ else {
+ this.Reveal.left();
+ }
+ }
+ else if( deltaX < -SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
+ this.touchCaptured = true;
+ if( config.navigationMode === 'linear' ) {
+ if( config.rtl ) {
+ this.Reveal.prev();
+ }
+ else {
+ this.Reveal.next();
+ }
+ }
+ else {
+ this.Reveal.right();
+ }
+ }
+ else if( deltaY > SWIPE_THRESHOLD && availableRoutes.up ) {
+ this.touchCaptured = true;
+ if( config.navigationMode === 'linear' ) {
+ this.Reveal.prev();
+ }
+ else {
+ this.Reveal.up();
+ }
+ }
+ else if( deltaY < -SWIPE_THRESHOLD && availableRoutes.down ) {
+ this.touchCaptured = true;
+ if( config.navigationMode === 'linear' ) {
+ this.Reveal.next();
+ }
+ else {
+ this.Reveal.down();
+ }
+ }
+
+ // If we're embedded, only block touch events if they have
+ // triggered an action
+ if( config.embedded ) {
+ if( this.touchCaptured || this.Reveal.isVerticalSlide() ) {
+ event.preventDefault();
+ }
+ }
+ // Not embedded? Block them all to avoid needless tossing
+ // around of the viewport in iOS
+ else {
+ event.preventDefault();
+ }
+
+ }
+ }
+ // There's a bug with swiping on some Android devices unless
+ // the default action is always prevented
+ else if( isAndroid ) {
+ event.preventDefault();
+ }
+
+ }
+
+ /**
+ * Handler for the 'touchend' event.
+ *
+ * @param {object} event
+ */
+ onTouchEnd( event ) {
+
+ this.touchCaptured = false;
+
+ }
+
+ /**
+ * Convert pointer down to touch start.
+ *
+ * @param {object} event
+ */
+ onPointerDown( event ) {
+
+ if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
+ event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
+ this.onTouchStart( event );
+ }
+
+ }
+
+ /**
+ * Convert pointer move to touch move.
+ *
+ * @param {object} event
+ */
+ onPointerMove( event ) {
+
+ if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
+ event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
+ this.onTouchMove( event );
+ }
+
+ }
+
+ /**
+ * Convert pointer up to touch end.
+ *
+ * @param {object} event
+ */
+ onPointerUp( event ) {
+
+ if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
+ event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
+ this.onTouchEnd( event );
+ }
+
+ }
+
+}
\ No newline at end of file