).';\n\n\t\tif( initialized ) throw 'Reveal.js has already been initialized.';\n\n\t\tinitialized = true;\n\n\t\t// Cache references to key DOM elements\n\t\tdom.wrapper = revealElement;\n\t\tdom.slides = revealElement.querySelector( '.slides' );\n\n\t\tif( !dom.slides ) throw 'Unable to find slides container (
).';\n\n\t\t// Compose our config object in order of increasing precedence:\n\t\t// 1. Default reveal.js options\n\t\t// 2. Options provided via Reveal.configure() prior to\n\t\t// initialization\n\t\t// 3. Options passed to the Reveal constructor\n\t\t// 4. Options passed to Reveal.initialize\n\t\t// 5. Query params\n\t\tconfig = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };\n\n\t\t// Legacy support for the ?print-pdf query\n\t\tif( /print-pdf/gi.test( window.location.search ) ) {\n\t\t\tconfig.view = 'print';\n\t\t}\n\n\t\tsetViewport();\n\n\t\t// Force a layout when the whole page, incl fonts, has loaded\n\t\twindow.addEventListener( 'load', layout, false );\n\n\t\t// Register plugins and load dependencies, then move on to #start()\n\t\tplugins.load( config.plugins, config.dependencies ).then( start );\n\n\t\treturn new Promise( resolve => Reveal.on( 'ready', resolve ) );\n\n\t}\n\n\t/**\n\t * Encase the presentation in a reveal.js viewport. The\n\t * extent of the viewport differs based on configuration.\n\t */\n\tfunction setViewport() {\n\n\t\t// Embedded decks use the reveal element as their viewport\n\t\tif( config.embedded === true ) {\n\t\t\tdom.viewport = Util.closest( revealElement, '.reveal-viewport' ) || revealElement;\n\t\t}\n\t\t// Full-page decks use the body as their viewport\n\t\telse {\n\t\t\tdom.viewport = document.body;\n\t\t\tdocument.documentElement.classList.add( 'reveal-full-page' );\n\t\t}\n\n\t\tdom.viewport.classList.add( 'reveal-viewport' );\n\n\t}\n\n\t/**\n\t * Starts up reveal.js by binding input events and navigating\n\t * to the current URL deeplink if there is one.\n\t */\n\tfunction start() {\n\n\t\t// Don't proceed if this instance has been destroyed\n\t\tif( initialized === false ) return;\n\n\t\tready = true;\n\n\t\t// Remove slides hidden with data-visibility\n\t\tremoveHiddenSlides();\n\n\t\t// Make sure we've got all the DOM elements we need\n\t\tsetupDOM();\n\n\t\t// Listen to messages posted to this window\n\t\tsetupPostMessage();\n\n\t\t// Prevent the slides from being scrolled out of view\n\t\tsetupScrollPrevention();\n\n\t\t// Adds bindings for fullscreen mode\n\t\tsetupFullscreen();\n\n\t\t// Resets all vertical slides so that only the first is visible\n\t\tresetVerticalSlides();\n\n\t\t// Updates the presentation to match the current configuration values\n\t\tconfigure();\n\n\t\t// Create slide backgrounds\n\t\tbackgrounds.update( true );\n\n\t\t// Activate the print/scroll view if configured\n\t\tactivateInitialView();\n\n\t\t// Read the initial hash\n\t\tlocation.readURL();\n\n\t\t// Notify listeners that the presentation is ready but use a 1ms\n\t\t// timeout to ensure it's not fired synchronously after #initialize()\n\t\tsetTimeout( () => {\n\t\t\t// Enable transitions now that we're loaded\n\t\t\tdom.slides.classList.remove( 'no-transition' );\n\n\t\t\tdom.wrapper.classList.add( 'ready' );\n\n\t\t\tdispatchEvent({\n\t\t\t\ttype: 'ready',\n\t\t\t\tdata: {\n\t\t\t\t\tindexh,\n\t\t\t\t\tindexv,\n\t\t\t\t\tcurrentSlide\n\t\t\t\t}\n\t\t\t});\n\t\t}, 1 );\n\n\t}\n\n\t/**\n\t * Activates the correct reveal.js view based on our config.\n\t * This is only invoked once during initialization.\n\t */\n\tfunction activateInitialView() {\n\n\t\tconst activatePrintView = config.view === 'print';\n\t\tconst activateScrollView = config.view === 'scroll' || config.view === 'reader';\n\n\t\tif( activatePrintView || activateScrollView ) {\n\n\t\t\tif( activatePrintView ) {\n\t\t\t\tremoveEventListeners();\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttouch.unbind();\n\t\t\t}\n\n\t\t\t// Avoid content flickering during layout\n\t\t\tdom.viewport.classList.add( 'loading-scroll-mode' );\n\n\t\t\tif( activatePrintView ) {\n\t\t\t\t// The document needs to have loaded for the PDF layout\n\t\t\t\t// measurements to be accurate\n\t\t\t\tif( document.readyState === 'complete' ) {\n\t\t\t\t\tprintView.activate();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\twindow.addEventListener( 'load', () => printView.activate() );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\tscrollView.activate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes all slides with data-visibility=\"hidden\". This\n\t * is done right before the rest of the presentation is\n\t * initialized.\n\t *\n\t * If you want to show all hidden slides, initialize\n\t * reveal.js with showHiddenSlides set to true.\n\t */\n\tfunction removeHiddenSlides() {\n\n\t\tif( !config.showHiddenSlides ) {\n\t\t\tUtil.queryAll( dom.wrapper, 'section[data-visibility=\"hidden\"]' ).forEach( slide => {\n\t\t\t\tconst parent = slide.parentNode;\n\n\t\t\t\t// If this slide is part of a stack and that stack will be\n\t\t\t\t// empty after removing the hidden slide, remove the entire\n\t\t\t\t// stack\n\t\t\t\tif( parent.childElementCount === 1 && /section/i.test( parent.nodeName ) ) {\n\t\t\t\t\tparent.remove();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslide.remove();\n\t\t\t\t}\n\n\t\t\t} );\n\t\t}\n\n\t}\n\n\t/**\n\t * Finds and stores references to DOM elements which are\n\t * required by the presentation. If a required element is\n\t * not found, it is created.\n\t */\n\tfunction setupDOM() {\n\n\t\t// Prevent transitions while we're loading\n\t\tdom.slides.classList.add( 'no-transition' );\n\n\t\tif( Device.isMobile ) {\n\t\t\tdom.wrapper.classList.add( 'no-hover' );\n\t\t}\n\t\telse {\n\t\t\tdom.wrapper.classList.remove( 'no-hover' );\n\t\t}\n\n\t\tbackgrounds.render();\n\t\tslideNumber.render();\n\t\tjumpToSlide.render();\n\t\tcontrols.render();\n\t\tprogress.render();\n\t\tnotes.render();\n\n\t\t// Overlay graphic which is displayed during the paused mode\n\t\tdom.pauseOverlay = Util.createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '
Resume presentation ' : null );\n\n\t\tdom.statusElement = createStatusElement();\n\n\t\tdom.wrapper.setAttribute( 'role', 'application' );\n\t}\n\n\t/**\n\t * Creates a hidden div with role aria-live to announce the\n\t * current slide content. Hide the div off-screen to make it\n\t * available only to Assistive Technologies.\n\t *\n\t * @return {HTMLElement}\n\t */\n\tfunction createStatusElement() {\n\n\t\tlet statusElement = dom.wrapper.querySelector( '.aria-status' );\n\t\tif( !statusElement ) {\n\t\t\tstatusElement = document.createElement( 'div' );\n\t\t\tstatusElement.style.position = 'absolute';\n\t\t\tstatusElement.style.height = '1px';\n\t\t\tstatusElement.style.width = '1px';\n\t\t\tstatusElement.style.overflow = 'hidden';\n\t\t\tstatusElement.style.clip = 'rect( 1px, 1px, 1px, 1px )';\n\t\t\tstatusElement.classList.add( 'aria-status' );\n\t\t\tstatusElement.setAttribute( 'aria-live', 'polite' );\n\t\t\tstatusElement.setAttribute( 'aria-atomic','true' );\n\t\t\tdom.wrapper.appendChild( statusElement );\n\t\t}\n\t\treturn statusElement;\n\n\t}\n\n\t/**\n\t * Announces the given text to screen readers.\n\t */\n\tfunction announceStatus( value ) {\n\n\t\tdom.statusElement.textContent = value;\n\n\t}\n\n\t/**\n\t * Converts the given HTML element into a string of text\n\t * that can be announced to a screen reader. Hidden\n\t * elements are excluded.\n\t */\n\tfunction getStatusText( node ) {\n\n\t\tlet text = '';\n\n\t\t// Text node\n\t\tif( node.nodeType === 3 ) {\n\t\t\ttext += node.textContent.trim();\n\t\t}\n\t\t// Element node\n\t\telse if( node.nodeType === 1 ) {\n\n\t\t\tlet isAriaHidden = node.getAttribute( 'aria-hidden' );\n\t\t\tlet isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';\n\t\t\tif( isAriaHidden !== 'true' && !isDisplayHidden ) {\n\n\t\t\t\t// Capture alt text from img and video elements\n\t\t\t\tif( node.tagName === 'IMG' || node.tagName === 'VIDEO' ) {\n\t\t\t\t\tlet altText = node.getAttribute( 'alt' );\n\t\t\t\t\tif( altText ) {\n\t\t\t\t\t\ttext += ensurePunctuation( altText );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tArray.from( node.childNodes ).forEach( child => {\n\t\t\t\t\ttext += getStatusText( child );\n\t\t\t\t} );\n\n\t\t\t\t// Add period after block-level text elements to improve\n\t\t\t\t// screen reader experience\n\t\t\t\tconst textElements = ['P', 'DIV', 'UL', 'OL', 'LI', 'H1', 'H2', 'H3', 'H4', 'H5', 'H6', 'BLOCKQUOTE'];\n\t\t\t\tif( textElements.includes( node.tagName ) && text.trim() !== '' ) {\n\t\t\t\t\ttext = ensurePunctuation( text );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\ttext = text.trim();\n\n\t\treturn text === '' ? '' : text + ' ';\n\n\t}\n\n\t/**\n\t * Ensures text ends with proper punctuation by adding a period\n\t * if it doesn't already end with punctuation.\n\t */\n\tfunction ensurePunctuation( text ) {\n\n\t\tconst trimmedText = text.trim();\n\n\t\tif( trimmedText === '' ) {\n\t\t\treturn text;\n\t\t}\n\n\t\treturn !/[.!?]$/.test(trimmedText) ? trimmedText + '.' : trimmedText;\n\n\t}\n\n\t/**\n\t * This is an unfortunate necessity. Some actions – such as\n\t * an input field being focused in an iframe or using the\n\t * keyboard to expand text selection beyond the bounds of\n\t * a slide – can trigger our content to be pushed out of view.\n\t * This scrolling can not be prevented by hiding overflow in\n\t * CSS (we already do) so we have to resort to repeatedly\n\t * checking if the slides have been offset :(\n\t */\n\tfunction setupScrollPrevention() {\n\n\t\tsetInterval( () => {\n\t\t\tif( !scrollView.isActive() && dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {\n\t\t\t\tdom.wrapper.scrollTop = 0;\n\t\t\t\tdom.wrapper.scrollLeft = 0;\n\t\t\t}\n\t\t}, 1000 );\n\n\t}\n\n\t/**\n\t * After entering fullscreen we need to force a layout to\n\t * get our presentations to scale correctly. This behavior\n\t * is inconsistent across browsers but a force layout seems\n\t * to normalize it.\n\t */\n\tfunction setupFullscreen() {\n\n\t\tdocument.addEventListener( 'fullscreenchange', onFullscreenChange );\n\t\tdocument.addEventListener( 'webkitfullscreenchange', onFullscreenChange );\n\n\t}\n\n\t/**\n\t * Registers a listener to postMessage events, this makes it\n\t * possible to call all reveal.js API methods from another\n\t * window. For example:\n\t *\n\t * revealWindow.postMessage( JSON.stringify({\n\t * method: 'slide',\n\t * args: [ 2 ]\n\t * }), '*' );\n\t */\n\tfunction setupPostMessage() {\n\n\t\tif( config.postMessage ) {\n\t\t\twindow.addEventListener( 'message', onPostMessage, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies the configuration settings from the config\n\t * object. May be called multiple times.\n\t *\n\t * @param {object} options\n\t */\n\tfunction configure( options ) {\n\n\t\tconst oldConfig = { ...config }\n\n\t\t// New config options may be passed when this method\n\t\t// is invoked through the API after initialization\n\t\tif( typeof options === 'object' ) Util.extend( config, options );\n\n\t\t// Abort if reveal.js hasn't finished loading, config\n\t\t// changes will be applied automatically once ready\n\t\tif( Reveal.isReady() === false ) return;\n\n\t\tconst numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;\n\n\t\t// The transition is added as a class on the .reveal element\n\t\tdom.wrapper.classList.remove( oldConfig.transition );\n\t\tdom.wrapper.classList.add( config.transition );\n\n\t\tdom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );\n\t\tdom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );\n\n\t\t// Expose our configured slide dimensions as custom props\n\t\tdom.viewport.style.setProperty( '--slide-width', typeof config.width === 'string' ? config.width : config.width + 'px' );\n\t\tdom.viewport.style.setProperty( '--slide-height', typeof config.height === 'string' ? config.height : config.height + 'px' );\n\n\t\tif( config.shuffle ) {\n\t\t\tshuffle();\n\t\t}\n\n\t\tUtil.toggleClass( dom.wrapper, 'embedded', config.embedded );\n\t\tUtil.toggleClass( dom.wrapper, 'rtl', config.rtl );\n\t\tUtil.toggleClass( dom.wrapper, 'center', config.center );\n\n\t\t// Exit the paused mode if it was configured off\n\t\tif( config.pause === false ) {\n\t\t\tresume();\n\t\t}\n\n\t\t// Reset all changes made by auto-animations\n\t\tautoAnimate.reset();\n\n\t\t// Remove existing auto-slide controls\n\t\tif( autoSlidePlayer ) {\n\t\t\tautoSlidePlayer.destroy();\n\t\t\tautoSlidePlayer = null;\n\t\t}\n\n\t\t// Generate auto-slide controls if needed\n\t\tif( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) {\n\t\t\tautoSlidePlayer = new Playback( dom.wrapper, () => {\n\t\t\t\treturn Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );\n\t\t\t} );\n\n\t\t\tautoSlidePlayer.on( 'click', onAutoSlidePlayerClick );\n\t\t\tautoSlidePaused = false;\n\t\t}\n\n\t\t// Add the navigation mode to the DOM so we can adjust styling\n\t\tif( config.navigationMode !== 'default' ) {\n\t\t\tdom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );\n\t\t}\n\t\telse {\n\t\t\tdom.wrapper.removeAttribute( 'data-navigation-mode' );\n\t\t}\n\n\t\tnotes.configure( config, oldConfig );\n\t\tfocus.configure( config, oldConfig );\n\t\tpointer.configure( config, oldConfig );\n\t\tcontrols.configure( config, oldConfig );\n\t\tprogress.configure( config, oldConfig );\n\t\tkeyboard.configure( config, oldConfig );\n\t\tfragments.configure( config, oldConfig );\n\t\tslideNumber.configure( config, oldConfig );\n\n\t\tsync();\n\n\t}\n\n\t/**\n\t * Binds all event listeners.\n\t */\n\tfunction addEventListeners() {\n\n\t\teventsAreBound = true;\n\n\t\twindow.addEventListener( 'resize', onWindowResize, false );\n\n\t\tif( config.touch ) touch.bind();\n\t\tif( config.keyboard ) keyboard.bind();\n\t\tif( config.progress ) progress.bind();\n\t\tif( config.respondToHashChanges ) location.bind();\n\t\tcontrols.bind();\n\t\tfocus.bind();\n\n\t\tdom.slides.addEventListener( 'click', onSlidesClicked, false );\n\t\tdom.slides.addEventListener( 'transitionend', onTransitionEnd, false );\n\t\tdom.pauseOverlay.addEventListener( 'click', resume, false );\n\n\t\tif( config.focusBodyOnPageVisibilityChange ) {\n\t\t\tdocument.addEventListener( 'visibilitychange', onPageVisibilityChange, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Unbinds all event listeners.\n\t */\n\tfunction removeEventListeners() {\n\n\t\teventsAreBound = false;\n\n\t\ttouch.unbind();\n\t\tfocus.unbind();\n\t\tkeyboard.unbind();\n\t\tcontrols.unbind();\n\t\tprogress.unbind();\n\t\tlocation.unbind();\n\n\t\twindow.removeEventListener( 'resize', onWindowResize, false );\n\n\t\tdom.slides.removeEventListener( 'click', onSlidesClicked, false );\n\t\tdom.slides.removeEventListener( 'transitionend', onTransitionEnd, false );\n\t\tdom.pauseOverlay.removeEventListener( 'click', resume, false );\n\n\t}\n\n\t/**\n\t * Uninitializes reveal.js by undoing changes made to the\n\t * DOM and removing all event listeners.\n\t */\n\tfunction destroy() {\n\n\t\tinitialized = false;\n\n\t\t// There's nothing to destroy if this instance hasn't finished\n\t\t// initializing\n\t\tif( ready === false ) return;\n\n\t\tremoveEventListeners();\n\t\tcancelAutoSlide();\n\n\t\t// Destroy controllers\n\t\tnotes.destroy();\n\t\tfocus.destroy();\n\t\toverlay.destroy();\n\t\tplugins.destroy();\n\t\tpointer.destroy();\n\t\tcontrols.destroy();\n\t\tprogress.destroy();\n\t\tbackgrounds.destroy();\n\t\tslideNumber.destroy();\n\t\tjumpToSlide.destroy();\n\n\t\t// Remove event listeners\n\t\tdocument.removeEventListener( 'fullscreenchange', onFullscreenChange );\n\t\tdocument.removeEventListener( 'webkitfullscreenchange', onFullscreenChange );\n\t\tdocument.removeEventListener( 'visibilitychange', onPageVisibilityChange, false );\n\t\twindow.removeEventListener( 'message', onPostMessage, false );\n\t\twindow.removeEventListener( 'load', layout, false );\n\n\t\t// Undo DOM changes\n\t\tif( dom.pauseOverlay ) dom.pauseOverlay.remove();\n\t\tif( dom.statusElement ) dom.statusElement.remove();\n\n\t\tdocument.documentElement.classList.remove( 'reveal-full-page' );\n\n\t\tdom.wrapper.classList.remove( 'ready', 'center', 'has-horizontal-slides', 'has-vertical-slides' );\n\t\tdom.wrapper.removeAttribute( 'data-transition-speed' );\n\t\tdom.wrapper.removeAttribute( 'data-background-transition' );\n\n\t\tdom.viewport.classList.remove( 'reveal-viewport' );\n\t\tdom.viewport.style.removeProperty( '--slide-width' );\n\t\tdom.viewport.style.removeProperty( '--slide-height' );\n\n\t\tdom.slides.style.removeProperty( 'width' );\n\t\tdom.slides.style.removeProperty( 'height' );\n\t\tdom.slides.style.removeProperty( 'zoom' );\n\t\tdom.slides.style.removeProperty( 'left' );\n\t\tdom.slides.style.removeProperty( 'top' );\n\t\tdom.slides.style.removeProperty( 'bottom' );\n\t\tdom.slides.style.removeProperty( 'right' );\n\t\tdom.slides.style.removeProperty( 'transform' );\n\n\t\tArray.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {\n\t\t\tslide.style.removeProperty( 'display' );\n\t\t\tslide.style.removeProperty( 'top' );\n\t\t\tslide.removeAttribute( 'hidden' );\n\t\t\tslide.removeAttribute( 'aria-hidden' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Adds a listener to one of our custom reveal.js events,\n\t * like slidechanged.\n\t */\n\tfunction on( type, listener, useCapture ) {\n\n\t\trevealElement.addEventListener( type, listener, useCapture );\n\n\t}\n\n\t/**\n\t * Unsubscribes from a reveal.js event.\n\t */\n\tfunction off( type, listener, useCapture ) {\n\n\t\trevealElement.removeEventListener( type, listener, useCapture );\n\n\t}\n\n\t/**\n\t * Applies CSS transforms to the slides container. The container\n\t * is transformed from two separate sources: layout and the overview\n\t * mode.\n\t *\n\t * @param {object} transforms\n\t */\n\tfunction transformSlides( transforms ) {\n\n\t\t// Pick up new transforms from arguments\n\t\tif( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;\n\t\tif( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;\n\n\t\t// Apply the transforms to the slides container\n\t\tif( slidesTransform.layout ) {\n\t\t\tUtil.transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );\n\t\t}\n\t\telse {\n\t\t\tUtil.transformElement( dom.slides, slidesTransform.overview );\n\t\t}\n\n\t}\n\n\t/**\n\t * Dispatches an event of the specified type from the\n\t * reveal DOM element.\n\t */\n\tfunction dispatchEvent({ target=dom.wrapper, type, data, bubbles=true }) {\n\n\t\tlet event = document.createEvent( 'HTMLEvents', 1, 2 );\n\t\tevent.initEvent( type, bubbles, true );\n\t\tUtil.extend( event, data );\n\t\ttarget.dispatchEvent( event );\n\n\t\tif( target === dom.wrapper ) {\n\t\t\t// If we're in an iframe, post each reveal.js event to the\n\t\t\t// parent window. Used by the notes plugin\n\t\t\tdispatchPostMessage( type );\n\t\t}\n\n\t\treturn event;\n\n\t}\n\n\t/**\n\t * Dispatches a slidechanged event.\n\t *\n\t * @param {string} origin Used to identify multiplex clients\n\t */\n\tfunction dispatchSlideChanged( origin ) {\n\n\t\tdispatchEvent({\n\t\t\ttype: 'slidechanged',\n\t\t\tdata: {\n\t\t\t\tindexh,\n\t\t\t\tindexv,\n\t\t\t\tpreviousSlide,\n\t\t\t\tcurrentSlide,\n\t\t\t\torigin\n\t\t\t}\n\t\t});\n\n\t}\n\n\t/**\n\t * Dispatched a postMessage of the given type from our window.\n\t */\n\tfunction dispatchPostMessage( type, data ) {\n\n\t\tif( config.postMessageEvents && window.parent !== window.self ) {\n\t\t\tlet message = {\n\t\t\t\tnamespace: 'reveal',\n\t\t\t\teventName: type,\n\t\t\t\tstate: getState()\n\t\t\t};\n\n\t\t\tUtil.extend( message, data );\n\n\t\t\twindow.parent.postMessage( JSON.stringify( message ), '*' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies JavaScript-controlled layout rules to the\n\t * presentation.\n\t */\n\tfunction layout() {\n\n\t\tif( dom.wrapper && !printView.isActive() ) {\n\n\t\t\tconst viewportWidth = dom.viewport.offsetWidth;\n\t\t\tconst viewportHeight = dom.viewport.offsetHeight;\n\n\t\t\tif( !config.disableLayout ) {\n\n\t\t\t\t// On some mobile devices '100vh' is taller than the visible\n\t\t\t\t// viewport which leads to part of the presentation being\n\t\t\t\t// cut off. To work around this we define our own '--vh' custom\n\t\t\t\t// property where 100x adds up to the correct height.\n\t\t\t\t//\n\t\t\t\t// https://css-tricks.com/the-trick-to-viewport-units-on-mobile/\n\t\t\t\tif( Device.isMobile && !config.embedded ) {\n\t\t\t\t\tdocument.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );\n\t\t\t\t}\n\n\t\t\t\tconst size = scrollView.isActive() ?\n\t\t\t\t\t\t\t getComputedSlideSize( viewportWidth, viewportHeight ) :\n\t\t\t\t\t\t\t getComputedSlideSize();\n\n\t\t\t\tconst oldScale = scale;\n\n\t\t\t\t// Layout the contents of the slides\n\t\t\t\tlayoutSlideContents( config.width, config.height );\n\n\t\t\t\tdom.slides.style.width = size.width + 'px';\n\t\t\t\tdom.slides.style.height = size.height + 'px';\n\n\t\t\t\t// Determine scale of content to fit within available space\n\t\t\t\tscale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );\n\n\t\t\t\t// Respect max/min scale settings\n\t\t\t\tscale = Math.max( scale, config.minScale );\n\t\t\t\tscale = Math.min( scale, config.maxScale );\n\n\t\t\t\t// Don't apply any scaling styles if scale is 1 or we're\n\t\t\t\t// in the scroll view\n\t\t\t\tif( scale === 1 || scrollView.isActive() ) {\n\t\t\t\t\tdom.slides.style.zoom = '';\n\t\t\t\t\tdom.slides.style.left = '';\n\t\t\t\t\tdom.slides.style.top = '';\n\t\t\t\t\tdom.slides.style.bottom = '';\n\t\t\t\t\tdom.slides.style.right = '';\n\t\t\t\t\ttransformSlides( { layout: '' } );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tdom.slides.style.zoom = '';\n\t\t\t\t\tdom.slides.style.left = '50%';\n\t\t\t\t\tdom.slides.style.top = '50%';\n\t\t\t\t\tdom.slides.style.bottom = 'auto';\n\t\t\t\t\tdom.slides.style.right = 'auto';\n\t\t\t\t\ttransformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );\n\t\t\t\t}\n\n\t\t\t\t// Select all slides, vertical and horizontal\n\t\t\t\tconst slides = Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) );\n\n\t\t\t\tfor( let i = 0, len = slides.length; i < len; i++ ) {\n\t\t\t\t\tconst slide = slides[ i ];\n\n\t\t\t\t\t// Don't bother updating invisible slides\n\t\t\t\t\tif( slide.style.display === 'none' ) {\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tif( ( config.center || slide.classList.contains( 'center' ) ) ) {\n\t\t\t\t\t\t// Vertical stacks are not centred since their section\n\t\t\t\t\t\t// children will be\n\t\t\t\t\t\tif( slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\t\t\tslide.style.top = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tslide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tslide.style.top = '';\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif( oldScale !== scale ) {\n\t\t\t\t\tdispatchEvent({\n\t\t\t\t\t\ttype: 'resize',\n\t\t\t\t\t\tdata: {\n\t\t\t\t\t\t\toldScale,\n\t\t\t\t\t\t\tscale,\n\t\t\t\t\t\t\tsize\n\t\t\t\t\t\t}\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tcheckResponsiveScrollView();\n\n\t\t\tdom.viewport.style.setProperty( '--slide-scale', scale );\n\t\t\tdom.viewport.style.setProperty( '--viewport-width', viewportWidth + 'px' );\n\t\t\tdom.viewport.style.setProperty( '--viewport-height', viewportHeight + 'px' );\n\n\t\t\tscrollView.layout();\n\n\t\t\tprogress.update();\n\t\t\tbackgrounds.updateParallax();\n\n\t\t\tif( overview.isActive() ) {\n\t\t\t\toverview.update();\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies layout logic to the contents of all slides in\n\t * the presentation.\n\t *\n\t * @param {string|number} width\n\t * @param {string|number} height\n\t */\n\tfunction layoutSlideContents( width, height ) {\n\t\t// Handle sizing of elements with the 'r-stretch' class\n\t\tUtil.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {\n\n\t\t\t// Determine how much vertical space we can use\n\t\t\tlet remainingHeight = Util.getRemainingHeight( element, height );\n\n\t\t\t// Consider the aspect ratio of media elements\n\t\t\tif( /(img|video)/gi.test( element.nodeName ) ) {\n\t\t\t\tconst nw = element.naturalWidth || element.videoWidth,\n\t\t\t\t\t nh = element.naturalHeight || element.videoHeight;\n\n\t\t\t\tconst es = Math.min( width / nw, remainingHeight / nh );\n\n\t\t\t\telement.style.width = ( nw * es ) + 'px';\n\t\t\t\telement.style.height = ( nh * es ) + 'px';\n\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.width = width + 'px';\n\t\t\t\telement.style.height = remainingHeight + 'px';\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Responsively activates the scroll mode when we reach the configured\n\t * activation width.\n\t */\n\tfunction checkResponsiveScrollView() {\n\n\t\t// Only proceed if...\n\t\t// 1. The DOM is ready\n\t\t// 2. Layouts aren't disabled via config\n\t\t// 3. We're not currently printing\n\t\t// 4. There is a scrollActivationWidth set\n\t\t// 5. The deck isn't configured to always use the scroll view\n\t\tif(\n\t\t\tdom.wrapper &&\n\t\t\t!config.disableLayout &&\n\t\t\t!printView.isActive() &&\n\t\t\ttypeof config.scrollActivationWidth === 'number' &&\n\t\t\tconfig.view !== 'scroll'\n\t\t) {\n\t\t\tconst size = getComputedSlideSize();\n\n\t\t\tif( size.presentationWidth > 0 && size.presentationWidth <= config.scrollActivationWidth ) {\n\t\t\t\tif( !scrollView.isActive() ) {\n\t\t\t\t\tbackgrounds.create();\n\t\t\t\t\tscrollView.activate()\n\t\t\t\t};\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( scrollView.isActive() ) scrollView.deactivate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Calculates the computed pixel size of our slides. These\n\t * values are based on the width and height configuration\n\t * options.\n\t *\n\t * @param {number} [presentationWidth=dom.wrapper.offsetWidth]\n\t * @param {number} [presentationHeight=dom.wrapper.offsetHeight]\n\t */\n\tfunction getComputedSlideSize( presentationWidth, presentationHeight ) {\n\n\t\tlet width = config.width;\n\t\tlet height = config.height;\n\n\t\tif( config.disableLayout ) {\n\t\t\twidth = dom.slides.offsetWidth;\n\t\t\theight = dom.slides.offsetHeight;\n\t\t}\n\n\t\tconst size = {\n\t\t\t// Slide size\n\t\t\twidth: width,\n\t\t\theight: height,\n\n\t\t\t// Presentation size\n\t\t\tpresentationWidth: presentationWidth || dom.wrapper.offsetWidth,\n\t\t\tpresentationHeight: presentationHeight || dom.wrapper.offsetHeight\n\t\t};\n\n\t\t// Reduce available space by margin\n\t\tsize.presentationWidth -= ( size.presentationWidth * config.margin );\n\t\tsize.presentationHeight -= ( size.presentationHeight * config.margin );\n\n\t\t// Slide width may be a percentage of available width\n\t\tif( typeof size.width === 'string' && /%$/.test( size.width ) ) {\n\t\t\tsize.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;\n\t\t}\n\n\t\t// Slide height may be a percentage of available height\n\t\tif( typeof size.height === 'string' && /%$/.test( size.height ) ) {\n\t\t\tsize.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;\n\t\t}\n\n\t\treturn size;\n\n\t}\n\n\t/**\n\t * Stores the vertical index of a stack so that the same\n\t * vertical slide can be selected when navigating to and\n\t * from the stack.\n\t *\n\t * @param {HTMLElement} stack The vertical stack element\n\t * @param {string|number} [v=0] Index to memorize\n\t */\n\tfunction setPreviousVerticalIndex( stack, v ) {\n\n\t\tif( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {\n\t\t\tstack.setAttribute( 'data-previous-indexv', v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Retrieves the vertical index which was stored using\n\t * #setPreviousVerticalIndex() or 0 if no previous index\n\t * exists.\n\t *\n\t * @param {HTMLElement} stack The vertical stack element\n\t */\n\tfunction getPreviousVerticalIndex( stack ) {\n\n\t\tif( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {\n\t\t\t// Prefer manually defined start-indexv\n\t\t\tconst attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv';\n\n\t\t\treturn parseInt( stack.getAttribute( attributeName ) || 0, 10 );\n\t\t}\n\n\t\treturn 0;\n\n\t}\n\n\t/**\n\t * Checks if the current or specified slide is vertical\n\t * (nested within another slide).\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to check\n\t * orientation of\n\t * @return {Boolean}\n\t */\n\tfunction isVerticalSlide( slide = currentSlide ) {\n\n\t\treturn slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );\n\n\t}\n\n\t/**\n\t * Checks if the current or specified slide is a stack containing\n\t * vertical slides.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide]\n\t * @return {Boolean}\n\t */\n\tfunction isVerticalStack( slide = currentSlide ) {\n\n\t\treturn slide.classList.contains( '.stack' ) || slide.querySelector( 'section' ) !== null;\n\n\t}\n\n\t/**\n\t * Returns true if we're on the last slide in the current\n\t * vertical stack.\n\t */\n\tfunction isLastVerticalSlide() {\n\n\t\tif( currentSlide && isVerticalSlide( currentSlide ) ) {\n\t\t\t// Does this slide have a next sibling?\n\t\t\tif( currentSlide.nextElementSibling ) return false;\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Returns true if we're currently on the first slide in\n\t * the presentation.\n\t */\n\tfunction isFirstSlide() {\n\n\t\treturn indexh === 0 && indexv === 0;\n\n\t}\n\n\t/**\n\t * Returns true if we're currently on the last slide in\n\t * the presentation. If the last slide is a stack, we only\n\t * consider this the last slide if it's at the end of the\n\t * stack.\n\t */\n\tfunction isLastSlide() {\n\n\t\tif( currentSlide ) {\n\t\t\t// Does this slide have a next sibling?\n\t\t\tif( currentSlide.nextElementSibling ) return false;\n\n\t\t\t// If it's vertical, does its parent have a next sibling?\n\t\t\tif( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false;\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Enters the paused mode which fades everything on screen to\n\t * black.\n\t */\n\tfunction pause() {\n\n\t\tif( config.pause ) {\n\t\t\tconst wasPaused = dom.wrapper.classList.contains( 'paused' );\n\n\t\t\tcancelAutoSlide();\n\t\t\tdom.wrapper.classList.add( 'paused' );\n\n\t\t\tif( wasPaused === false ) {\n\t\t\t\tdispatchEvent({ type: 'paused' });\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Exits from the paused mode.\n\t */\n\tfunction resume() {\n\n\t\tconst wasPaused = dom.wrapper.classList.contains( 'paused' );\n\t\tdom.wrapper.classList.remove( 'paused' );\n\n\t\tcueAutoSlide();\n\n\t\tif( wasPaused ) {\n\t\t\tdispatchEvent({ type: 'resumed' });\n\t\t}\n\n\t}\n\n\t/**\n\t * Toggles the paused mode on and off.\n\t */\n\tfunction togglePause( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? pause() : resume();\n\t\t}\n\t\telse {\n\t\t\tisPaused() ? resume() : pause();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if we are currently in the paused mode.\n\t *\n\t * @return {Boolean}\n\t */\n\tfunction isPaused() {\n\n\t\treturn dom.wrapper.classList.contains( 'paused' );\n\n\t}\n\n\t/**\n\t * Toggles visibility of the jump-to-slide UI.\n\t */\n\tfunction toggleJumpToSlide( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? jumpToSlide.show() : jumpToSlide.hide();\n\t\t}\n\t\telse {\n\t\t\tjumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show();\n\t\t}\n\n\t}\n\n\t/**\n\t * Toggles the auto slide mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which sets the desired state.\n\t * True means autoplay starts, false means it stops.\n\t */\n\n\tfunction toggleAutoSlide( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? resumeAutoSlide() : pauseAutoSlide();\n\t\t}\n\n\t\telse {\n\t\t\tautoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the auto slide mode is currently on.\n\t *\n\t * @return {Boolean}\n\t */\n\tfunction isAutoSliding() {\n\n\t\treturn !!( autoSlide && !autoSlidePaused );\n\n\t}\n\n\t/**\n\t * Steps from the current point in the presentation to the\n\t * slide which matches the specified horizontal and vertical\n\t * indices.\n\t *\n\t * @param {number} [h=indexh] Horizontal index of the target slide\n\t * @param {number} [v=indexv] Vertical index of the target slide\n\t * @param {number} [f] Index of a fragment within the\n\t * target slide to activate\n\t * @param {number} [origin] Origin for use in multimaster environments\n\t */\n\tfunction slide( h, v, f, origin ) {\n\n\t\t// Dispatch an event before the slide\n\t\tconst slidechange = dispatchEvent({\n\t\t\ttype: 'beforeslidechange',\n\t\t\tdata: {\n\t\t\t\tindexh: h === undefined ? indexh : h,\n\t\t\t\tindexv: v === undefined ? indexv : v,\n\t\t\t\torigin\n\t\t\t}\n\t\t});\n\n\t\t// Abort if this slide change was prevented by an event listener\n\t\tif( slidechange.defaultPrevented ) return;\n\n\t\t// Remember where we were at before\n\t\tpreviousSlide = currentSlide;\n\n\t\t// Query all horizontal slides in the deck\n\t\tconst horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );\n\n\t\t// If we're in scroll mode, we scroll the target slide into view\n\t\t// instead of running our standard slide transition\n\t\tif( scrollView.isActive() ) {\n\t\t\tconst scrollToSlide = scrollView.getSlideByIndices( h, v );\n\t\t\tif( scrollToSlide ) scrollView.scrollToSlide( scrollToSlide );\n\t\t\treturn;\n\t\t}\n\n\t\t// Abort if there are no slides\n\t\tif( horizontalSlides.length === 0 ) return;\n\n\t\t// If no vertical index is specified and the upcoming slide is a\n\t\t// stack, resume at its previous vertical index\n\t\tif( v === undefined && !overview.isActive() ) {\n\t\t\tv = getPreviousVerticalIndex( horizontalSlides[ h ] );\n\t\t}\n\n\t\t// If we were on a vertical stack, remember what vertical index\n\t\t// it was on so we can resume at the same position when returning\n\t\tif( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {\n\t\t\tsetPreviousVerticalIndex( previousSlide.parentNode, indexv );\n\t\t}\n\n\t\t// Remember the state before this slide\n\t\tconst stateBefore = state.concat();\n\n\t\t// Reset the state array\n\t\tstate.length = 0;\n\n\t\tlet indexhBefore = indexh || 0,\n\t\t\tindexvBefore = indexv || 0;\n\n\t\t// Activate and transition to the new slide\n\t\tindexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h );\n\t\tindexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v );\n\n\t\t// Dispatch an event if the slide changed\n\t\tlet slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );\n\n\t\t// Ensure that the previous slide is never the same as the current\n\t\tif( !slideChanged ) previousSlide = null;\n\n\t\t// Find the current horizontal slide and any possible vertical slides\n\t\t// within it\n\t\tlet currentHorizontalSlide = horizontalSlides[ indexh ],\n\t\t\tcurrentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );\n\n\t\t// Indicate when we're on a vertical slide\n\t\trevealElement.classList.toggle( 'is-vertical-slide', currentVerticalSlides.length > 1 );\n\n\t\t// Store references to the previous and current slides\n\t\tcurrentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;\n\n\t\tlet autoAnimateTransition = false;\n\n\t\t// Detect if we're moving between two auto-animated slides\n\t\tif( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {\n\t\t\ttransition = 'running';\n\n\t\t\tautoAnimateTransition = shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexvBefore );\n\n\t\t\t// If this is an auto-animated transition, we disable the\n\t\t\t// regular slide transition\n\t\t\t//\n\t\t\t// Note 20-03-2020:\n\t\t\t// This needs to happen before we update slide visibility,\n\t\t\t// otherwise transitions will still run in Safari.\n\t\t\tif( autoAnimateTransition ) {\n\t\t\t\tdom.slides.classList.add( 'disable-slide-transitions' )\n\t\t\t}\n\t\t}\n\n\t\t// Update the visibility of slides now that the indices have changed\n\t\tupdateSlidesVisibility();\n\n\t\tlayout();\n\n\t\t// Update the overview if it's currently active\n\t\tif( overview.isActive() ) {\n\t\t\toverview.update();\n\t\t}\n\n\t\t// Show fragment, if specified\n\t\tif( typeof f !== 'undefined' ) {\n\t\t\tfragments.goto( f );\n\t\t}\n\n\t\t// Solves an edge case where the previous slide maintains the\n\t\t// 'present' class when navigating between adjacent vertical\n\t\t// stacks\n\t\tif( previousSlide && previousSlide !== currentSlide ) {\n\t\t\tpreviousSlide.classList.remove( 'present' );\n\t\t\tpreviousSlide.setAttribute( 'aria-hidden', 'true' );\n\n\t\t\t// Reset all slides upon navigate to home\n\t\t\tif( isFirstSlide() ) {\n\t\t\t\t// Launch async task\n\t\t\t\tsetTimeout( () => {\n\t\t\t\t\tgetVerticalStacks().forEach( slide => {\n\t\t\t\t\t\tsetPreviousVerticalIndex( slide, 0 );\n\t\t\t\t\t} );\n\t\t\t\t}, 0 );\n\t\t\t}\n\t\t}\n\n\t\t// Apply the new state\n\t\tstateLoop: for( let i = 0, len = state.length; i < len; i++ ) {\n\t\t\t// Check if this state existed on the previous slide. If it\n\t\t\t// did, we will avoid adding it repeatedly\n\t\t\tfor( let j = 0; j < stateBefore.length; j++ ) {\n\t\t\t\tif( stateBefore[j] === state[i] ) {\n\t\t\t\t\tstateBefore.splice( j, 1 );\n\t\t\t\t\tcontinue stateLoop;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tdom.viewport.classList.add( state[i] );\n\n\t\t\t// Dispatch custom event matching the state's name\n\t\t\tdispatchEvent({ type: state[i] });\n\t\t}\n\n\t\t// Clean up the remains of the previous state\n\t\twhile( stateBefore.length ) {\n\t\t\tdom.viewport.classList.remove( stateBefore.pop() );\n\t\t}\n\n\t\tif( slideChanged ) {\n\t\t\tdispatchSlideChanged( origin );\n\t\t}\n\n\t\t// Handle embedded content\n\t\tif( slideChanged || !previousSlide ) {\n\t\t\tslideContent.stopEmbeddedContent( previousSlide );\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t}\n\n\t\t// Announce the current slide contents to screen readers\n\t\t// Use animation frame to prevent getComputedStyle in getStatusText\n\t\t// from triggering layout mid-frame\n\t\trequestAnimationFrame( () => {\n\t\t\tannounceStatus( getStatusText( currentSlide ) );\n\t\t});\n\n\t\tprogress.update();\n\t\tcontrols.update();\n\t\tnotes.update();\n\t\tbackgrounds.update();\n\t\tbackgrounds.updateParallax();\n\t\tslideNumber.update();\n\t\tfragments.update();\n\n\t\t// Update the URL hash\n\t\tlocation.writeURL();\n\n\t\tcueAutoSlide();\n\n\t\t// Auto-animation\n\t\tif( autoAnimateTransition ) {\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tdom.slides.classList.remove( 'disable-slide-transitions' );\n\t\t\t}, 0 );\n\n\t\t\tif( config.autoAnimate ) {\n\t\t\t\t// Run the auto-animation between our slides\n\t\t\t\tautoAnimate.run( previousSlide, currentSlide );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks whether or not an auto-animation should take place between\n\t * the two given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t * @param {number} indexhBefore\n\t * @param {number} indexvBefore\n\t *\n\t * @returns {boolean}\n\t */\n\tfunction shouldAutoAnimateBetween( fromSlide, toSlide, indexhBefore, indexvBefore ) {\n\n\t\treturn \tfromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) &&\n\t\t\t\tfromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) &&\n\t\t\t\t!( ( indexh > indexhBefore || indexv > indexvBefore ) ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' );\n\n\t}\n\n\t/**\n\t * Called anytime a new slide should be activated while in the scroll\n\t * view. The active slide is the page that occupies the most space in\n\t * the scrollable viewport.\n\t *\n\t * @param {number} pageIndex\n\t * @param {HTMLElement} slideElement\n\t */\n\tfunction setCurrentScrollPage( slideElement, h, v ) {\n\n\t\tlet indexhBefore = indexh || 0;\n\n\t\tindexh = h;\n\t\tindexv = v;\n\n\t\tconst slideChanged = currentSlide !== slideElement;\n\n\t\tpreviousSlide = currentSlide;\n\t\tcurrentSlide = slideElement;\n\n\t\tif( currentSlide && previousSlide ) {\n\t\t\tif( config.autoAnimate && shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexv ) ) {\n\t\t\t\t// Run the auto-animation between our slides\n\t\t\t\tautoAnimate.run( previousSlide, currentSlide );\n\t\t\t}\n\t\t}\n\n\t\t// Start or stop embedded content like videos and iframes\n\t\tif( slideChanged ) {\n\t\t\tif( previousSlide ) {\n\t\t\t\tslideContent.stopEmbeddedContent( previousSlide );\n\t\t\t\tslideContent.stopEmbeddedContent( previousSlide.slideBackgroundElement );\n\t\t\t}\n\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t\tslideContent.startEmbeddedContent( currentSlide.slideBackgroundElement );\n\t\t}\n\n\t\trequestAnimationFrame( () => {\n\t\t\tannounceStatus( getStatusText( currentSlide ) );\n\t\t});\n\n\t\tdispatchSlideChanged();\n\n\t}\n\n\t/**\n\t * Syncs the presentation with the current DOM. Useful\n\t * when new slides or control elements are added or when\n\t * the configuration has changed.\n\t */\n\tfunction sync() {\n\n\t\t// Subscribe to input\n\t\tremoveEventListeners();\n\t\taddEventListeners();\n\n\t\t// Force a layout to make sure the current config is accounted for\n\t\tlayout();\n\n\t\t// Reflect the current autoSlide value\n\t\tautoSlide = config.autoSlide;\n\n\t\t// Start auto-sliding if it's enabled\n\t\tcueAutoSlide();\n\n\t\t// Re-create all slide backgrounds\n\t\tbackgrounds.create();\n\n\t\t// Write the current hash to the URL\n\t\tlocation.writeURL();\n\n\t\tif( config.sortFragmentsOnSync === true ) {\n\t\t\tfragments.sortAll();\n\t\t}\n\n\t\tcontrols.update();\n\t\tprogress.update();\n\n\t\tupdateSlidesVisibility();\n\n\t\tnotes.update();\n\t\tnotes.updateVisibility();\n\t\toverlay.update();\n\t\tbackgrounds.update( true );\n\t\tslideNumber.update();\n\t\tslideContent.formatEmbeddedContent();\n\n\t\t// Start or stop embedded content depending on global config\n\t\tif( config.autoPlayMedia === false ) {\n\t\t\tslideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } );\n\t\t}\n\t\telse {\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t}\n\n\t\tif( overview.isActive() ) {\n\t\t\toverview.layout();\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates reveal.js to keep in sync with new slide attributes. For\n\t * example, if you add a new `data-background-image` you can call\n\t * this to have reveal.js render the new background image.\n\t *\n\t * Similar to #sync() but more efficient when you only need to\n\t * refresh a specific slide.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tfunction syncSlide( slide = currentSlide ) {\n\n\t\tbackgrounds.sync( slide );\n\t\tfragments.sync( slide );\n\n\t\tslideContent.load( slide );\n\n\t\tbackgrounds.update();\n\t\tnotes.update();\n\n\t}\n\n\t/**\n\t * Resets all vertical slides so that only the first\n\t * is visible.\n\t */\n\tfunction resetVerticalSlides() {\n\n\t\tgetHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tUtil.queryAll( horizontalSlide, 'section' ).forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tif( y > 0 ) {\n\t\t\t\t\tverticalSlide.classList.remove( 'present' );\n\t\t\t\t\tverticalSlide.classList.remove( 'past' );\n\t\t\t\t\tverticalSlide.classList.add( 'future' );\n\t\t\t\t\tverticalSlide.setAttribute( 'aria-hidden', 'true' );\n\t\t\t\t}\n\n\t\t\t} );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Randomly shuffles all slides in the deck.\n\t */\n\tfunction shuffle( slides = getHorizontalSlides() ) {\n\n\t\tslides.forEach( ( slide, i ) => {\n\n\t\t\t// Insert the slide next to a randomly picked sibling slide\n\t\t\t// slide. This may cause the slide to insert before itself,\n\t\t\t// but that's not an issue.\n\t\t\tlet beforeSlide = slides[ Math.floor( Math.random() * slides.length ) ];\n\t\t\tif( beforeSlide.parentNode === slide.parentNode ) {\n\t\t\t\tslide.parentNode.insertBefore( slide, beforeSlide );\n\t\t\t}\n\n\t\t\t// Randomize the order of vertical slides (if there are any)\n\t\t\tlet verticalSlides = slide.querySelectorAll( 'section' );\n\t\t\tif( verticalSlides.length ) {\n\t\t\t\tshuffle( verticalSlides );\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Updates one dimension of slides by showing the slide\n\t * with the specified index.\n\t *\n\t * @param {string} selector A CSS selector that will fetch\n\t * the group of slides we are working with\n\t * @param {number} index The index of the slide that should be\n\t * shown\n\t *\n\t * @return {number} The index of the slide that is now shown,\n\t * might differ from the passed in index if it was out of\n\t * bounds.\n\t */\n\tfunction updateSlides( selector, index ) {\n\n\t\t// Select all slides and convert the NodeList result to\n\t\t// an array\n\t\tlet slides = Util.queryAll( dom.wrapper, selector ),\n\t\t\tslidesLength = slides.length;\n\n\t\tlet printMode = scrollView.isActive() || printView.isActive();\n\t\tlet loopedForwards = false;\n\t\tlet loopedBackwards = false;\n\n\t\tif( slidesLength ) {\n\n\t\t\t// Should the index loop?\n\t\t\tif( config.loop ) {\n\t\t\t\tif( index >= slidesLength ) loopedForwards = true;\n\n\t\t\t\tindex %= slidesLength;\n\n\t\t\t\tif( index < 0 ) {\n\t\t\t\t\tindex = slidesLength + index;\n\t\t\t\t\tloopedBackwards = true;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Enforce max and minimum index bounds\n\t\t\tindex = Math.max( Math.min( index, slidesLength - 1 ), 0 );\n\n\t\t\tfor( let i = 0; i < slidesLength; i++ ) {\n\t\t\t\tlet element = slides[i];\n\n\t\t\t\tlet reverse = config.rtl && !isVerticalSlide( element );\n\n\t\t\t\t// Avoid .remove() with multiple args for IE11 support\n\t\t\t\telement.classList.remove( 'past' );\n\t\t\t\telement.classList.remove( 'present' );\n\t\t\t\telement.classList.remove( 'future' );\n\n\t\t\t\t// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute\n\t\t\t\telement.setAttribute( 'hidden', '' );\n\t\t\t\telement.setAttribute( 'aria-hidden', 'true' );\n\n\t\t\t\t// If this element contains vertical slides\n\t\t\t\tif( element.querySelector( 'section' ) ) {\n\t\t\t\t\telement.classList.add( 'stack' );\n\t\t\t\t}\n\n\t\t\t\t// If we're printing static slides, all slides are \"present\"\n\t\t\t\tif( printMode ) {\n\t\t\t\t\telement.classList.add( 'present' );\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif( i < index ) {\n\t\t\t\t\t// Any element previous to index is given the 'past' class\n\t\t\t\t\telement.classList.add( reverse ? 'future' : 'past' );\n\n\t\t\t\t\tif( config.fragments ) {\n\t\t\t\t\t\t// Show all fragments in prior slides\n\t\t\t\t\t\tshowFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( i > index ) {\n\t\t\t\t\t// Any element subsequent to index is given the 'future' class\n\t\t\t\t\telement.classList.add( reverse ? 'past' : 'future' );\n\n\t\t\t\t\tif( config.fragments ) {\n\t\t\t\t\t\t// Hide all fragments in future slides\n\t\t\t\t\t\thideFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Update the visibility of fragments when a presentation loops\n\t\t\t\t// in either direction\n\t\t\t\telse if( i === index && config.fragments ) {\n\t\t\t\t\tif( loopedForwards ) {\n\t\t\t\t\t\thideFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t\telse if( loopedBackwards ) {\n\t\t\t\t\t\tshowFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tlet slide = slides[index];\n\t\t\tlet wasPresent = slide.classList.contains( 'present' );\n\n\t\t\t// Mark the current slide as present\n\t\t\tslide.classList.add( 'present' );\n\t\t\tslide.removeAttribute( 'hidden' );\n\t\t\tslide.removeAttribute( 'aria-hidden' );\n\n\t\t\tif( !wasPresent ) {\n\t\t\t\t// Dispatch an event indicating the slide is now visible\n\t\t\t\tdispatchEvent({\n\t\t\t\t\ttarget: slide,\n\t\t\t\t\ttype: 'visible',\n\t\t\t\t\tbubbles: false\n\t\t\t\t});\n\t\t\t}\n\n\t\t\t// If this slide has a state associated with it, add it\n\t\t\t// onto the current state of the deck\n\t\t\tlet slideState = slide.getAttribute( 'data-state' );\n\t\t\tif( slideState ) {\n\t\t\t\tstate = state.concat( slideState.split( ' ' ) );\n\t\t\t}\n\n\t\t}\n\t\telse {\n\t\t\t// Since there are no slides we can't be anywhere beyond the\n\t\t\t// zeroth index\n\t\t\tindex = 0;\n\t\t}\n\n\t\treturn index;\n\n\t}\n\n\t/**\n\t * Shows all fragment elements within the given container.\n\t */\n\tfunction showFragmentsIn( container ) {\n\n\t\tUtil.queryAll( container, '.fragment' ).forEach( fragment => {\n\t\t\tfragment.classList.add( 'visible' );\n\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Hides all fragment elements within the given container.\n\t */\n\tfunction hideFragmentsIn( container ) {\n\n\t\tUtil.queryAll( container, '.fragment.visible' ).forEach( fragment => {\n\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Optimization method; hide all slides that are far away\n\t * from the present slide.\n\t */\n\tfunction updateSlidesVisibility() {\n\n\t\t// Select all slides and convert the NodeList result to\n\t\t// an array\n\t\tlet horizontalSlides = getHorizontalSlides(),\n\t\t\thorizontalSlidesLength = horizontalSlides.length,\n\t\t\tdistanceX,\n\t\t\tdistanceY;\n\n\t\tif( horizontalSlidesLength && typeof indexh !== 'undefined' ) {\n\n\t\t\tconst isOverview = overview.isActive();\n\n\t\t\t// The number of steps away from the present slide that will\n\t\t\t// be visible\n\t\t\tlet viewDistance = isOverview ? 10 : config.viewDistance;\n\n\t\t\t// Shorten the view distance on devices that typically have\n\t\t\t// less resources\n\t\t\tif( Device.isMobile ) {\n\t\t\t\tviewDistance = isOverview ? 6 : config.mobileViewDistance;\n\t\t\t}\n\n\t\t\t// All slides need to be visible when exporting to PDF\n\t\t\tif( printView.isActive() ) {\n\t\t\t\tviewDistance = Number.MAX_VALUE;\n\t\t\t}\n\n\t\t\tfor( let x = 0; x < horizontalSlidesLength; x++ ) {\n\t\t\t\tlet horizontalSlide = horizontalSlides[x];\n\n\t\t\t\tlet verticalSlides = Util.queryAll( horizontalSlide, 'section' ),\n\t\t\t\t\tverticalSlidesLength = verticalSlides.length;\n\n\t\t\t\t// Determine how far away this slide is from the present\n\t\t\t\tdistanceX = Math.abs( ( indexh || 0 ) - x ) || 0;\n\n\t\t\t\t// If the presentation is looped, distance should measure\n\t\t\t\t// 1 between the first and last slides\n\t\t\t\tif( config.loop ) {\n\t\t\t\t\tdistanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;\n\t\t\t\t}\n\n\t\t\t\t// Show the horizontal slide if it's within the view distance\n\t\t\t\tif( distanceX < viewDistance ) {\n\t\t\t\t\tslideContent.load( horizontalSlide );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslideContent.unload( horizontalSlide );\n\t\t\t\t}\n\n\t\t\t\tif( verticalSlidesLength ) {\n\n\t\t\t\t\tlet oy = isOverview ? 0 : getPreviousVerticalIndex( horizontalSlide );\n\n\t\t\t\t\tfor( let y = 0; y < verticalSlidesLength; y++ ) {\n\t\t\t\t\t\tlet verticalSlide = verticalSlides[y];\n\n\t\t\t\t\t\tdistanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );\n\n\t\t\t\t\t\tif( distanceX + distanceY < viewDistance ) {\n\t\t\t\t\t\t\tslideContent.load( verticalSlide );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tslideContent.unload( verticalSlide );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Flag if there are ANY vertical slides, anywhere in the deck\n\t\t\tif( hasVerticalSlides() ) {\n\t\t\t\tdom.wrapper.classList.add( 'has-vertical-slides' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tdom.wrapper.classList.remove( 'has-vertical-slides' );\n\t\t\t}\n\n\t\t\t// Flag if there are ANY horizontal slides, anywhere in the deck\n\t\t\tif( hasHorizontalSlides() ) {\n\t\t\t\tdom.wrapper.classList.add( 'has-horizontal-slides' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tdom.wrapper.classList.remove( 'has-horizontal-slides' );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Determine what available routes there are for navigation.\n\t *\n\t * @return {{left: boolean, right: boolean, up: boolean, down: boolean}}\n\t */\n\tfunction availableRoutes({ includeFragments = false } = {}) {\n\n\t\tlet horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),\n\t\t\tverticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );\n\n\t\tlet routes = {\n\t\t\tleft: indexh > 0,\n\t\t\tright: indexh < horizontalSlides.length - 1,\n\t\t\tup: indexv > 0,\n\t\t\tdown: indexv < verticalSlides.length - 1\n\t\t};\n\n\t\t// Looped presentations can always be navigated as long as\n\t\t// there are slides available\n\t\tif( config.loop ) {\n\t\t\tif( horizontalSlides.length > 1 ) {\n\t\t\t\troutes.left = true;\n\t\t\t\troutes.right = true;\n\t\t\t}\n\n\t\t\tif( verticalSlides.length > 1 ) {\n\t\t\t\troutes.up = true;\n\t\t\t\troutes.down = true;\n\t\t\t}\n\t\t}\n\n\t\tif ( horizontalSlides.length > 1 && config.navigationMode === 'linear' ) {\n\t\t\troutes.right = routes.right || routes.down;\n\t\t\troutes.left = routes.left || routes.up;\n\t\t}\n\n\t\t// If includeFragments is set, a route will be considered\n\t\t// available if either a slid OR fragment is available in\n\t\t// the given direction\n\t\tif( includeFragments === true ) {\n\t\t\tlet fragmentRoutes = fragments.availableRoutes();\n\t\t\troutes.left = routes.left || fragmentRoutes.prev;\n\t\t\troutes.up = routes.up || fragmentRoutes.prev;\n\t\t\troutes.down = routes.down || fragmentRoutes.next;\n\t\t\troutes.right = routes.right || fragmentRoutes.next;\n\t\t}\n\n\t\t// Reverse horizontal controls for rtl\n\t\tif( config.rtl ) {\n\t\t\tlet left = routes.left;\n\t\t\troutes.left = routes.right;\n\t\t\troutes.right = left;\n\t\t}\n\n\t\treturn routes;\n\n\t}\n\n\t/**\n\t * Returns the number of past slides. This can be used as a global\n\t * flattened index for slides.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide we're counting before\n\t *\n\t * @return {number} Past slide count\n\t */\n\tfunction getSlidePastCount( slide = currentSlide ) {\n\n\t\tlet horizontalSlides = getHorizontalSlides();\n\n\t\t// The number of past slides\n\t\tlet pastCount = 0;\n\n\t\t// Step through all slides and count the past ones\n\t\tmainLoop: for( let i = 0; i < horizontalSlides.length; i++ ) {\n\n\t\t\tlet horizontalSlide = horizontalSlides[i];\n\t\t\tlet verticalSlides = horizontalSlide.querySelectorAll( 'section' );\n\n\t\t\tfor( let j = 0; j < verticalSlides.length; j++ ) {\n\n\t\t\t\t// Stop as soon as we arrive at the present\n\t\t\t\tif( verticalSlides[j] === slide ) {\n\t\t\t\t\tbreak mainLoop;\n\t\t\t\t}\n\n\t\t\t\t// Don't count slides with the \"uncounted\" class\n\t\t\t\tif( verticalSlides[j].dataset.visibility !== 'uncounted' ) {\n\t\t\t\t\tpastCount++;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// Stop as soon as we arrive at the present\n\t\t\tif( horizontalSlide === slide ) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Don't count the wrapping section for vertical slides and\n\t\t\t// slides marked as uncounted\n\t\t\tif( horizontalSlide.classList.contains( 'stack' ) === false && horizontalSlide.dataset.visibility !== 'uncounted' ) {\n\t\t\t\tpastCount++;\n\t\t\t}\n\n\t\t}\n\n\t\treturn pastCount;\n\n\t}\n\n\t/**\n\t * Returns a value ranging from 0-1 that represents\n\t * how far into the presentation we have navigated.\n\t *\n\t * @return {number}\n\t */\n\tfunction getProgress() {\n\n\t\t// The number of past and total slides\n\t\tlet totalCount = getTotalSlides();\n\t\tlet pastCount = getSlidePastCount();\n\n\t\tif( currentSlide ) {\n\n\t\t\tlet allFragments = currentSlide.querySelectorAll( '.fragment' );\n\n\t\t\t// If there are fragments in the current slide those should be\n\t\t\t// accounted for in the progress.\n\t\t\tif( allFragments.length > 0 ) {\n\t\t\t\tlet visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );\n\n\t\t\t\t// This value represents how big a portion of the slide progress\n\t\t\t\t// that is made up by its fragments (0-1)\n\t\t\t\tlet fragmentWeight = 0.9;\n\n\t\t\t\t// Add fragment progress to the past slide count\n\t\t\t\tpastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight;\n\t\t\t}\n\n\t\t}\n\n\t\treturn Math.min( pastCount / ( totalCount - 1 ), 1 );\n\n\t}\n\n\t/**\n\t * Retrieves the h/v location and fragment of the current,\n\t * or specified, slide.\n\t *\n\t * @param {HTMLElement} [slide] If specified, the returned\n\t * index will be for this slide rather than the currently\n\t * active one\n\t *\n\t * @return {{h: number, v: number, f: number}}\n\t */\n\tfunction getIndices( slide ) {\n\n\t\t// By default, return the current indices\n\t\tlet h = indexh,\n\t\t\tv = indexv,\n\t\t\tf;\n\n\t\t// If a slide is specified, return the indices of that slide\n\t\tif( slide ) {\n\t\t\t// In scroll mode the original h/x index is stored on the slide\n\t\t\tif( scrollView.isActive() ) {\n\t\t\t\th = parseInt( slide.getAttribute( 'data-index-h' ), 10 );\n\n\t\t\t\tif( slide.getAttribute( 'data-index-v' ) ) {\n\t\t\t\t\tv = parseInt( slide.getAttribute( 'data-index-v' ), 10 );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\tlet isVertical = isVerticalSlide( slide );\n\t\t\t\tlet slideh = isVertical ? slide.parentNode : slide;\n\n\t\t\t\t// Select all horizontal slides\n\t\t\t\tlet horizontalSlides = getHorizontalSlides();\n\n\t\t\t\t// Now that we know which the horizontal slide is, get its index\n\t\t\t\th = Math.max( horizontalSlides.indexOf( slideh ), 0 );\n\n\t\t\t\t// Assume we're not vertical\n\t\t\t\tv = undefined;\n\n\t\t\t\t// If this is a vertical slide, grab the vertical index\n\t\t\t\tif( isVertical ) {\n\t\t\t\t\tv = Math.max( Util.queryAll( slide.parentNode, 'section' ).indexOf( slide ), 0 );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( !slide && currentSlide ) {\n\t\t\tlet hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;\n\t\t\tif( hasFragments ) {\n\t\t\t\tlet currentFragment = currentSlide.querySelector( '.current-fragment' );\n\t\t\t\tif( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\tf = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tf = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn { h, v, f };\n\n\t}\n\n\t/**\n\t * Retrieves all slides in this presentation.\n\t */\n\tfunction getSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, SLIDES_SELECTOR + ':not(.stack):not([data-visibility=\"uncounted\"])' );\n\n\t}\n\n\t/**\n\t * Returns a list of all horizontal slides in the deck. Each\n\t * vertical stack is included as one horizontal slide in the\n\t * resulting array.\n\t */\n\tfunction getHorizontalSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR );\n\n\t}\n\n\t/**\n\t * Returns all vertical slides that exist within this deck.\n\t */\n\tfunction getVerticalSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, '.slides>section>section' );\n\n\t}\n\n\t/**\n\t * Returns all vertical stacks (each stack can contain multiple slides).\n\t */\n\tfunction getVerticalStacks() {\n\n\t\treturn Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.stack');\n\n\t}\n\n\t/**\n\t * Returns true if there are at least two horizontal slides.\n\t */\n\tfunction hasHorizontalSlides() {\n\n\t\treturn getHorizontalSlides().length > 1;\n\t}\n\n\t/**\n\t * Returns true if there are at least two vertical slides.\n\t */\n\tfunction hasVerticalSlides() {\n\n\t\treturn getVerticalSlides().length > 1;\n\n\t}\n\n\t/**\n\t * Returns an array of objects where each object represents the\n\t * attributes on its respective slide.\n\t */\n\tfunction getSlidesAttributes() {\n\n\t\treturn getSlides().map( slide => {\n\n\t\t\tlet attributes = {};\n\t\t\tfor( let i = 0; i < slide.attributes.length; i++ ) {\n\t\t\t\tlet attribute = slide.attributes[ i ];\n\t\t\t\tattributes[ attribute.name ] = attribute.value;\n\t\t\t}\n\t\t\treturn attributes;\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Retrieves the total number of slides in this presentation.\n\t *\n\t * @return {number}\n\t */\n\tfunction getTotalSlides() {\n\n\t\treturn getSlides().length;\n\n\t}\n\n\t/**\n\t * Returns the slide element matching the specified index.\n\t *\n\t * @return {HTMLElement}\n\t */\n\tfunction getSlide( x, y ) {\n\n\t\tlet horizontalSlide = getHorizontalSlides()[ x ];\n\t\tlet verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );\n\n\t\tif( verticalSlides && verticalSlides.length && typeof y === 'number' ) {\n\t\t\treturn verticalSlides ? verticalSlides[ y ] : undefined;\n\t\t}\n\n\t\treturn horizontalSlide;\n\n\t}\n\n\t/**\n\t * Returns the background element for the given slide.\n\t * All slides, even the ones with no background properties\n\t * defined, have a background element so as long as the\n\t * index is valid an element will be returned.\n\t *\n\t * @param {mixed} x Horizontal background index OR a slide\n\t * HTML element\n\t * @param {number} y Vertical background index\n\t * @return {(HTMLElement[]|*)}\n\t */\n\tfunction getSlideBackground( x, y ) {\n\n\t\tlet slide = typeof x === 'number' ? getSlide( x, y ) : x;\n\t\tif( slide ) {\n\t\t\treturn slide.slideBackgroundElement;\n\t\t}\n\n\t\treturn undefined;\n\n\t}\n\n\t/**\n\t * Retrieves the current state of the presentation as\n\t * an object. This state can then be restored at any\n\t * time.\n\t *\n\t * @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}\n\t */\n\tfunction getState() {\n\n\t\tlet indices = getIndices();\n\n\t\treturn {\n\t\t\tindexh: indices.h,\n\t\t\tindexv: indices.v,\n\t\t\tindexf: indices.f,\n\t\t\tpaused: isPaused(),\n\t\t\toverview: overview.isActive(),\n\t\t\t...overlay.getState()\n\t\t};\n\n\t}\n\n\t/**\n\t * Restores the presentation to the given state.\n\t *\n\t * @param {object} state As generated by getState()\n\t * @see {@link getState} generates the parameter `state`\n\t */\n\tfunction setState( state ) {\n\n\t\tif( typeof state === 'object' ) {\n\t\t\tslide( Util.deserialize( state.indexh ), Util.deserialize( state.indexv ), Util.deserialize( state.indexf ) );\n\n\t\t\tlet pausedFlag = Util.deserialize( state.paused ),\n\t\t\t\toverviewFlag = Util.deserialize( state.overview );\n\n\t\t\tif( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {\n\t\t\t\ttogglePause( pausedFlag );\n\t\t\t}\n\n\t\t\tif( typeof overviewFlag === 'boolean' && overviewFlag !== overview.isActive() ) {\n\t\t\t\toverview.toggle( overviewFlag );\n\t\t\t}\n\n\t\t\toverlay.setState( state );\n\t\t}\n\n\t}\n\n\t/**\n\t * Cues a new automated slide if enabled in the config.\n\t */\n\tfunction cueAutoSlide() {\n\n\t\tcancelAutoSlide();\n\n\t\tif( currentSlide && config.autoSlide !== false ) {\n\n\t\t\tlet fragment = currentSlide.querySelector( '.current-fragment[data-autoslide]' );\n\n\t\t\tlet fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;\n\t\t\tlet parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;\n\t\t\tlet slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );\n\n\t\t\t// Pick value in the following priority order:\n\t\t\t// 1. Current fragment's data-autoslide\n\t\t\t// 2. Current slide's data-autoslide\n\t\t\t// 3. Parent slide's data-autoslide\n\t\t\t// 4. Global autoSlide setting\n\t\t\tif( fragmentAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( fragmentAutoSlide, 10 );\n\t\t\t}\n\t\t\telse if( slideAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( slideAutoSlide, 10 );\n\t\t\t}\n\t\t\telse if( parentAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( parentAutoSlide, 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tautoSlide = config.autoSlide;\n\n\t\t\t\t// If there are media elements with data-autoplay,\n\t\t\t\t// automatically set the autoSlide duration to the\n\t\t\t\t// length of that media. Not applicable if the slide\n\t\t\t\t// is divided up into fragments.\n\t\t\t\t// playbackRate is accounted for in the duration.\n\t\t\t\tif( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {\n\t\t\t\t\tUtil.queryAll( currentSlide, 'video, audio' ).forEach( el => {\n\t\t\t\t\t\tif( el.hasAttribute( 'data-autoplay' ) ) {\n\t\t\t\t\t\t\tif( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {\n\t\t\t\t\t\t\t\tautoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Cue the next auto-slide if:\n\t\t\t// - There is an autoSlide value\n\t\t\t// - Auto-sliding isn't paused by the user\n\t\t\t// - The presentation isn't paused\n\t\t\t// - The overview isn't active\n\t\t\t// - The presentation isn't over\n\t\t\tif( autoSlide && !autoSlidePaused && !isPaused() && !overview.isActive() && ( !isLastSlide() || fragments.availableRoutes().next || config.loop === true ) ) {\n\t\t\t\tautoSlideTimeout = setTimeout( () => {\n\t\t\t\t\tif( typeof config.autoSlideMethod === 'function' ) {\n\t\t\t\t\t\tconfig.autoSlideMethod()\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tnavigateNext();\n\t\t\t\t\t}\n\t\t\t\t\tcueAutoSlide();\n\t\t\t\t}, autoSlide );\n\t\t\t\tautoSlideStartTime = Date.now();\n\t\t\t}\n\n\t\t\tif( autoSlidePlayer ) {\n\t\t\t\tautoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Cancels any ongoing request to auto-slide.\n\t */\n\tfunction cancelAutoSlide() {\n\n\t\tclearTimeout( autoSlideTimeout );\n\t\tautoSlideTimeout = -1;\n\n\t}\n\n\tfunction pauseAutoSlide() {\n\n\t\tif( autoSlide && !autoSlidePaused ) {\n\t\t\tautoSlidePaused = true;\n\t\t\tdispatchEvent({ type: 'autoslidepaused' });\n\t\t\tclearTimeout( autoSlideTimeout );\n\n\t\t\tif( autoSlidePlayer ) {\n\t\t\t\tautoSlidePlayer.setPlaying( false );\n\t\t\t}\n\t\t}\n\n\t}\n\n\tfunction resumeAutoSlide() {\n\n\t\tif( autoSlide && autoSlidePaused ) {\n\t\t\tautoSlidePaused = false;\n\t\t\tdispatchEvent({ type: 'autoslideresumed' });\n\t\t\tcueAutoSlide();\n\t\t}\n\n\t}\n\n\tfunction navigateLeft({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Reverse for RTL\n\t\tif( config.rtl ) {\n\t\t\tif( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().left ) {\n\t\t\t\tslide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t\t}\n\t\t}\n\t\t// Normal navigation\n\t\telse if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().left ) {\n\t\t\tslide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t}\n\n\t}\n\n\tfunction navigateRight({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Reverse for RTL\n\t\tif( config.rtl ) {\n\t\t\tif( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().right ) {\n\t\t\t\tslide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t\t}\n\t\t}\n\t\t// Normal navigation\n\t\telse if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().right ) {\n\t\t\tslide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t}\n\n\t}\n\n\tfunction navigateUp({skipFragments=false}={}) {\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Prioritize hiding fragments\n\t\tif( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().up ) {\n\t\t\tslide( indexh, indexv - 1 );\n\t\t}\n\n\t}\n\n\tfunction navigateDown({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedVertically = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Prioritize revealing fragments\n\t\tif( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().down ) {\n\t\t\tslide( indexh, indexv + 1 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Navigates backwards, prioritized in the following order:\n\t * 1) Previous fragment\n\t * 2) Previous vertical slide\n\t * 3) Previous horizontal slide\n\t */\n\tfunction navigatePrev({skipFragments=false}={}) {\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Prioritize revealing fragments\n\t\tif( skipFragments || fragments.prev() === false ) {\n\t\t\tif( availableRoutes().up ) {\n\t\t\t\tnavigateUp({skipFragments});\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Fetch the previous horizontal slide, if there is one\n\t\t\t\tlet previousSlide;\n\n\t\t\t\tif( config.rtl ) {\n\t\t\t\t\tpreviousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.future' ).pop();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tpreviousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.past' ).pop();\n\t\t\t\t}\n\n\t\t\t\t// When going backwards and arriving on a stack we start\n\t\t\t\t// at the bottom of the stack\n\t\t\t\tif( previousSlide && previousSlide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tlet v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;\n\t\t\t\t\tlet h = indexh - 1;\n\t\t\t\t\tslide( h, v );\n\t\t\t\t}\n\t\t\t\telse if( config.rtl ) {\n\t\t\t\t\tnavigateRight({skipFragments});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tnavigateLeft({skipFragments});\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * The reverse of #navigatePrev().\n\t */\n\tfunction navigateNext({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\t\tnavigationHistory.hasNavigatedVertically = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Prioritize revealing fragments\n\t\tif( skipFragments || fragments.next() === false ) {\n\n\t\t\tlet routes = availableRoutes();\n\n\t\t\t// When looping is enabled `routes.down` is always available\n\t\t\t// so we need a separate check for when we've reached the\n\t\t\t// end of a stack and should move horizontally\n\t\t\tif( routes.down && routes.right && config.loop && isLastVerticalSlide() ) {\n\t\t\t\troutes.down = false;\n\t\t\t}\n\n\t\t\tif( routes.down ) {\n\t\t\t\tnavigateDown({skipFragments});\n\t\t\t}\n\t\t\telse if( config.rtl ) {\n\t\t\t\tnavigateLeft({skipFragments});\n\t\t\t}\n\t\t\telse {\n\t\t\t\tnavigateRight({skipFragments});\n\t\t\t}\n\t\t}\n\n\t}\n\n\n\t// --------------------------------------------------------------------//\n\t// ----------------------------- EVENTS -------------------------------//\n\t// --------------------------------------------------------------------//\n\n\t/**\n\t * Called by all event handlers that are based on user\n\t * input.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onUserInput( event ) {\n\n\t\tif( config.autoSlideStoppable ) {\n\t\t\tpauseAutoSlide();\n\t\t}\n\n\t}\n\n\t/**\n\t* Listener for post message events posted to this window.\n\t*/\n\tfunction onPostMessage( event ) {\n\n\t\tlet data = event.data;\n\n\t\t// Make sure we're dealing with JSON\n\t\tif( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {\n\t\t\tdata = JSON.parse( data );\n\n\t\t\t// Check if the requested method can be found\n\t\t\tif( data.method && typeof Reveal[data.method] === 'function' ) {\n\n\t\t\t\tif( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {\n\n\t\t\t\t\tconst result = Reveal[data.method].apply( Reveal, data.args );\n\n\t\t\t\t\t// Dispatch a postMessage event with the returned value from\n\t\t\t\t\t// our method invocation for getter functions\n\t\t\t\t\tdispatchPostMessage( 'callback', { method: data.method, result: result } );\n\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tconsole.warn( 'reveal.js: \"'+ data.method +'\" is is blacklisted from the postMessage API' );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Event listener for transition end on the current slide.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onTransitionEnd( event ) {\n\n\t\tif( transition === 'running' && /section/gi.test( event.target.nodeName ) ) {\n\t\t\ttransition = 'idle';\n\t\t\tdispatchEvent({\n\t\t\t\ttype: 'slidetransitionend',\n\t\t\t\tdata: { indexh, indexv, previousSlide, currentSlide }\n\t\t\t});\n\t\t}\n\n\t}\n\n\t/**\n\t * A global listener for all click events inside of the\n\t * .slides container.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onSlidesClicked( event ) {\n\n\t\tconst anchor = Util.closest( event.target, 'a[href^=\"#\"]' );\n\n\t\t// If a hash link is clicked, we find the target slide\n\t\t// and navigate to it. We previously relied on 'hashchange'\n\t\t// for links like these but that prevented media with\n\t\t// audio tracks from playing in mobile browsers since it\n\t\t// wasn't considered a direct interaction with the document.\n\t\tif( anchor ) {\n\t\t\tconst hash = anchor.getAttribute( 'href' );\n\t\t\tconst indices = location.getIndicesFromHash( hash );\n\n\t\t\tif( indices ) {\n\t\t\t\tReveal.slide( indices.h, indices.v, indices.f );\n\t\t\t\tevent.preventDefault();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the window level 'resize' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onWindowResize( event ) {\n\n\t\tlayout();\n\t}\n\n\t/**\n\t * Handle for the window level 'visibilitychange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onPageVisibilityChange( event ) {\n\n\t\t// If, after clicking a link or similar and we're coming back,\n\t\t// focus the document.body to ensure we can use keyboard shortcuts\n\t\tif( document.hidden === false && document.activeElement !== document.body ) {\n\t\t\t// Not all elements support .blur() - SVGs among them.\n\t\t\tif( typeof document.activeElement.blur === 'function' ) {\n\t\t\t\tdocument.activeElement.blur();\n\t\t\t}\n\t\t\tdocument.body.focus();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the document level 'fullscreenchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onFullscreenChange( event ) {\n\n\t\tlet element = document.fullscreenElement || document.webkitFullscreenElement;\n\t\tif( element === dom.wrapper ) {\n\t\t\tevent.stopImmediatePropagation();\n\n\t\t\t// Timeout to avoid layout shift in Safari\n\t\t\tsetTimeout( () => {\n\t\t\t\tReveal.layout();\n\t\t\t\tReveal.focus.focus(); // focus.focus :'(\n\t\t\t}, 1 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Handles click on the auto-sliding controls element.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onAutoSlidePlayerClick( event ) {\n\n\t\t// Replay\n\t\tif( isLastSlide() && config.loop === false ) {\n\t\t\tslide( 0, 0 );\n\t\t\tresumeAutoSlide();\n\t\t}\n\t\t// Resume\n\t\telse if( autoSlidePaused ) {\n\t\t\tresumeAutoSlide();\n\t\t}\n\t\t// Pause\n\t\telse {\n\t\t\tpauseAutoSlide();\n\t\t}\n\n\t}\n\n\n\t// --------------------------------------------------------------------//\n\t// ------------------------------- API --------------------------------//\n\t// --------------------------------------------------------------------//\n\n\t// The public reveal.js API\n\tconst API = {\n\t\tVERSION,\n\n\t\tinitialize,\n\t\tconfigure,\n\t\tdestroy,\n\n\t\tsync,\n\t\tsyncSlide,\n\t\tsyncFragments: fragments.sync.bind( fragments ),\n\n\t\t// Navigation methods\n\t\tslide,\n\t\tleft: navigateLeft,\n\t\tright: navigateRight,\n\t\tup: navigateUp,\n\t\tdown: navigateDown,\n\t\tprev: navigatePrev,\n\t\tnext: navigateNext,\n\n\t\t// Navigation aliases\n\t\tnavigateLeft, navigateRight, navigateUp, navigateDown, navigatePrev, navigateNext,\n\n\t\t// Fragment methods\n\t\tnavigateFragment: fragments.goto.bind( fragments ),\n\t\tprevFragment: fragments.prev.bind( fragments ),\n\t\tnextFragment: fragments.next.bind( fragments ),\n\n\t\t// Event binding\n\t\ton,\n\t\toff,\n\n\t\t// Legacy event binding methods left in for backwards compatibility\n\t\taddEventListener: on,\n\t\tremoveEventListener: off,\n\n\t\t// Forces an update in slide layout\n\t\tlayout,\n\n\t\t// Randomizes the order of slides\n\t\tshuffle,\n\n\t\t// Returns an object with the available routes as booleans (left/right/top/bottom)\n\t\tavailableRoutes,\n\n\t\t// Returns an object with the available fragments as booleans (prev/next)\n\t\tavailableFragments: fragments.availableRoutes.bind( fragments ),\n\n\t\t// Toggles a help overlay with keyboard shortcuts\n\t\ttoggleHelp: overlay.toggleHelp.bind( overlay ),\n\n\t\t// Toggles the overview mode on/off\n\t\ttoggleOverview: overview.toggle.bind( overview ),\n\n\t\t// Toggles the scroll view on/off\n\t\ttoggleScrollView: scrollView.toggle.bind( scrollView ),\n\n\t\t// Toggles the \"black screen\" mode on/off\n\t\ttogglePause,\n\n\t\t// Toggles the auto slide mode on/off\n\t\ttoggleAutoSlide,\n\n\t\t// Toggles visibility of the jump-to-slide UI\n\t\ttoggleJumpToSlide,\n\n\t\t// Slide navigation checks\n\t\tisFirstSlide,\n\t\tisLastSlide,\n\t\tisLastVerticalSlide,\n\t\tisVerticalSlide,\n\t\tisVerticalStack,\n\n\t\t// State checks\n\t\tisPaused,\n\t\tisAutoSliding,\n\t\tisSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ),\n\t\tisOverview: overview.isActive.bind( overview ),\n\t\tisFocused: focus.isFocused.bind( focus ),\n\t\tisOverlayOpen: overlay.isOpen.bind( overlay ),\n\t\tisScrollView: scrollView.isActive.bind( scrollView ),\n\t\tisPrintView: printView.isActive.bind( printView ),\n\n\t\t// Checks if reveal.js has been loaded and is ready for use\n\t\tisReady: () => ready,\n\n\t\t// Slide preloading\n\t\tloadSlide: slideContent.load.bind( slideContent ),\n\t\tunloadSlide: slideContent.unload.bind( slideContent ),\n\n\t\t// Start/stop all media inside of the current slide\n\t\tstartEmbeddedContent: () => slideContent.startEmbeddedContent( currentSlide ),\n\t\tstopEmbeddedContent: () => slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ),\n\n\t\t// Lightbox previews\n\t\tpreviewIframe: overlay.previewIframe.bind( overlay ),\n\t\tpreviewImage: overlay.previewImage.bind( overlay ),\n\t\tpreviewVideo: overlay.previewVideo.bind( overlay ),\n\n\t\tshowPreview: overlay.previewIframe.bind( overlay ), // deprecated in favor of showIframeLightbox\n\t\thidePreview: overlay.close.bind( overlay ),\n\n\t\t// Adds or removes all internal event listeners\n\t\taddEventListeners,\n\t\tremoveEventListeners,\n\t\tdispatchEvent,\n\n\t\t// Facility for persisting and restoring the presentation state\n\t\tgetState,\n\t\tsetState,\n\n\t\t// Presentation progress on range of 0-1\n\t\tgetProgress,\n\n\t\t// Returns the indices of the current, or specified, slide\n\t\tgetIndices,\n\n\t\t// Returns an Array of key:value maps of the attributes of each\n\t\t// slide in the deck\n\t\tgetSlidesAttributes,\n\n\t\t// Returns the number of slides that we have passed\n\t\tgetSlidePastCount,\n\n\t\t// Returns the total number of slides\n\t\tgetTotalSlides,\n\n\t\t// Returns the slide element at the specified index\n\t\tgetSlide,\n\n\t\t// Returns the previous slide element, may be null\n\t\tgetPreviousSlide: () => previousSlide,\n\n\t\t// Returns the current slide element\n\t\tgetCurrentSlide: () => currentSlide,\n\n\t\t// Returns the slide background element at the specified index\n\t\tgetSlideBackground,\n\n\t\t// Returns the speaker notes string for a slide, or null\n\t\tgetSlideNotes: notes.getSlideNotes.bind( notes ),\n\n\t\t// Returns an Array of all slides\n\t\tgetSlides,\n\n\t\t// Returns an array with all horizontal/vertical slides in the deck\n\t\tgetHorizontalSlides,\n\t\tgetVerticalSlides,\n\n\t\t// Checks if the presentation contains two or more horizontal\n\t\t// and vertical slides\n\t\thasHorizontalSlides,\n\t\thasVerticalSlides,\n\n\t\t// Checks if the deck has navigated on either axis at least once\n\t\thasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally,\n\t\thasNavigatedVertically: () => navigationHistory.hasNavigatedVertically,\n\n\t\tshouldAutoAnimateBetween,\n\n\t\t// Adds/removes a custom key binding\n\t\taddKeyBinding: keyboard.addKeyBinding.bind( keyboard ),\n\t\tremoveKeyBinding: keyboard.removeKeyBinding.bind( keyboard ),\n\n\t\t// Programmatically triggers a keyboard event\n\t\ttriggerKey: keyboard.triggerKey.bind( keyboard ),\n\n\t\t// Registers a new shortcut to include in the help overlay\n\t\tregisterKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ),\n\n\t\tgetComputedSlideSize,\n\t\tsetCurrentScrollPage,\n\n\t\t// Returns the current scale of the presentation content\n\t\tgetScale: () => scale,\n\n\t\t// Returns the current configuration object\n\t\tgetConfig: () => config,\n\n\t\t// Helper method, retrieves query string as a key:value map\n\t\tgetQueryHash: Util.getQueryHash,\n\n\t\t// Returns the path to the current slide as represented in the URL\n\t\tgetSlidePath: location.getHash.bind( location ),\n\n\t\t// Returns reveal.js DOM elements\n\t\tgetRevealElement: () => revealElement,\n\t\tgetSlidesElement: () => dom.slides,\n\t\tgetViewportElement: () => dom.viewport,\n\t\tgetBackgroundsElement: () => backgrounds.element,\n\n\t\t// API for registering and retrieving plugins\n\t\tregisterPlugin: plugins.registerPlugin.bind( plugins ),\n\t\thasPlugin: plugins.hasPlugin.bind( plugins ),\n\t\tgetPlugin: plugins.getPlugin.bind( plugins ),\n\t\tgetPlugins: plugins.getRegisteredPlugins.bind( plugins )\n\n\t};\n\n\t// Our internal API which controllers have access to\n\tUtil.extend( Reveal, {\n\t\t...API,\n\n\t\t// Methods for announcing content to screen readers\n\t\tannounceStatus,\n\t\tgetStatusText,\n\n\t\t// Controllers\n\t\tfocus,\n\t\tscroll: scrollView,\n\t\tprogress,\n\t\tcontrols,\n\t\tlocation,\n\t\toverview,\n\t\tkeyboard,\n\t\tfragments,\n\t\tbackgrounds,\n\t\tslideContent,\n\t\tslideNumber,\n\n\t\tonUserInput,\n\t\tcloseOverlay: overlay.close.bind( overlay ),\n\t\tupdateSlidesVisibility,\n\t\tlayoutSlideContents,\n\t\ttransformSlides,\n\t\tcueAutoSlide,\n\t\tcancelAutoSlide\n\t} );\n\n\treturn API;\n\n};\n","import Deck, { VERSION } from './reveal.js'\n\n/**\n * Expose the Reveal class to the window. 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diff --git a/dist/reveal.js b/dist/reveal.js
index deeec2e6..3dcc0de5 100644
--- a/dist/reveal.js
+++ b/dist/reveal.js
@@ -5,5 +5,5 @@
*
* Copyright (C) 2011-2024 Hakim El Hattab, https://hakim.se
*/
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r=this.getAutoAnimatableProperties("from",e,i),o=this.getAutoAnimatableProperties("to",t,i);if(t.classList.contains("fragment")&&delete o.styles.opacity,!1!==i.translate||!1!==i.scale){let e=this.Reveal.getScale(),t={x:(r.x-o.x)/e,y:(r.y-o.y)/e,scaleX:r.width/o.width,scaleY:r.height/o.height};t.x=Math.round(1e3*t.x)/1e3,t.y=Math.round(1e3*t.y)/1e3,t.scaleX=Math.round(1e3*t.scaleX)/1e3,t.scaleX=Math.round(1e3*t.scaleX)/1e3;let s=!1!==i.translate&&(0!==t.x||0!==t.y),a=!1!==i.scale&&(0!==t.scaleX||0!==t.scaleY);if(s||a){let e=[];s&&e.push(`translate(${t.x}px, ${t.y}px)`),a&&e.push(`scale(${t.scaleX}, ${t.scaleY})`),r.styles.transform=e.join(" "),r.styles["transform-origin"]="top left",o.styles.transform="none"}}for(let e in o.styles){const t=o.styles[e],i=r.styles[e];t===i?delete o.styles[e]:(!0===t.explicitValue&&(o.styles[e]=t.value),!0===i.explicitValue&&(r.styles[e]=i.value))}let l="",d=Object.keys(o.styles);if(d.length>0){r.styles.transition="none",o.styles.transition=`all 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s=this.Reveal.getConfig(),a={styles:[]};if(!1!==i.translate||!1!==i.scale){let e;if("function"==typeof i.measure)e=i.measure(t);else if(s.center)e=t.getBoundingClientRect();else{let i=this.Reveal.getScale();e={x:t.offsetLeft*i,y:t.offsetTop*i,width:t.offsetWidth*i,height:t.offsetHeight*i}}a.x=e.x,a.y=e.y,a.width=e.width,a.height=e.height}const n=getComputedStyle(t);return(i.styles||s.autoAnimateStyles).forEach((t=>{let i;"string"==typeof t&&(t={property:t}),void 0!==t.from&&"from"===e?i={value:t.from,explicitValue:!0}:void 0!==t.to&&"to"===e?i={value:t.to,explicitValue:!0}:("line-height"===t.property&&(i=parseFloat(n["line-height"])/parseFloat(n["font-size"])),isNaN(i)&&(i=n[t.property])),""!==i&&(a.styles[t.property]=i)})),a}getAutoAnimatableElements(e,t){let i=("function"==typeof this.Reveal.getConfig().autoAnimateMatcher?this.Reveal.getConfig().autoAnimateMatcher:this.getAutoAnimatePairs).call(this,e,t),s=[];return i.filter(((e,t)=>{if(-1===s.indexOf(e.to))return s.push(e.to),!0}))}getAutoAnimatePairs(e,t){let i=[];const s="h1, h2, h3, h4, h5, h6, p, li";return this.findAutoAnimateMatches(i,e,t,"[data-id]",(e=>e.nodeName+":::"+e.getAttribute("data-id"))),this.findAutoAnimateMatches(i,e,t,s,(e=>e.nodeName+":::"+e.textContent.trim())),this.findAutoAnimateMatches(i,e,t,"img, video, iframe",(e=>e.nodeName+":::"+(e.getAttribute("src")||e.getAttribute("data-src")))),this.findAutoAnimateMatches(i,e,t,"pre",(e=>e.nodeName+":::"+e.textContent.trim())),i.forEach((e=>{n(e.from,s)?e.options={scale:!1}:n(e.from,"pre")&&(e.options={scale:!1,styles:["width","height"]},this.findAutoAnimateMatches(i,e.from,e.to,".hljs .hljs-ln-code",(e=>e.textContent),{scale:!1,styles:[],measure:this.getLocalBoundingBox.bind(this)}),this.findAutoAnimateMatches(i,e.from,e.to,".hljs .hljs-ln-numbers[data-line-number]",(e=>e.getAttribute("data-line-number")),{scale:!1,styles:["width"],measure:this.getLocalBoundingBox.bind(this)}))}),this),i}getLocalBoundingBox(e){const t=this.Reveal.getScale();return{x:Math.round(e.offsetLeft*t*100)/100,y:Math.round(e.offsetTop*t*100)/100,width:Math.round(e.offsetWidth*t*100)/100,height:Math.round(e.offsetHeight*t*100)/100}}findAutoAnimateMatches(e,t,i,s,a,n){let r={},o={};[].slice.call(t.querySelectorAll(s)).forEach(((e,t)=>{const i=a(e);"string"==typeof i&&i.length&&(r[i]=r[i]||[],r[i].push(e))})),[].slice.call(i.querySelectorAll(s)).forEach(((t,i)=>{const s=a(t);let l;if(o[s]=o[s]||[],o[s].push(t),r[s]){const e=o[s].length-1,t=r[s].length-1;r[s][e]?(l=r[s][e],r[s][e]=null):r[s][t]&&(l=r[s][t],r[s][t]=null)}l&&e.push({from:l,to:t,options:n})}))}getUnmatchedAutoAnimateElements(e){return[].slice.call(e.children).reduce(((e,t)=>{const i=t.querySelector("[data-auto-animate-target]");return t.hasAttribute("data-auto-animate-target")||i||e.push(t),t.querySelector("[data-auto-animate-target]")&&(e=e.concat(this.getUnmatchedAutoAnimateElements(t))),e}),[])}}class L{constructor(e){this.Reveal=e,this.active=!1,this.activatedCallbacks=[],this.onScroll=this.onScroll.bind(this)}activate(){if(this.active)return;const e=this.Reveal.getState();this.active=!0,this.slideHTMLBeforeActivation=this.Reveal.getSlidesElement().innerHTML;const i=t(this.Reveal.getRevealElement(),f),s=t(this.Reveal.getRevealElement(),".backgrounds>.slide-background");let a;this.viewportElement.classList.add("loading-scroll-mode","reveal-scroll");const n=window.getComputedStyle(this.viewportElement);n&&n.background&&(a=n.background);const r=[],o=i[0].parentNode;let l;const d=(e,t,i,n)=>{let o;if(l&&this.Reveal.shouldAutoAnimateBetween(l,e))o=document.createElement("div"),o.className="scroll-page-content scroll-auto-animate-page",o.style.display="none",l.closest(".scroll-page-content").parentNode.appendChild(o);else{const e=document.createElement("div");if(e.className="scroll-page",r.push(e),n&&s.length>t){const i=s[t],n=window.getComputedStyle(i);n&&n.background?e.style.background=n.background:a&&(e.style.background=a)}else a&&(e.style.background=a);const 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e=this.Reveal.getState();this.active=!1,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(e),this.slideHTMLBeforeActivation=null}toggle(e){"boolean"==typeof e?e?this.activate():this.deactivate():this.isActive()?this.deactivate():this.activate()}isActive(){return this.active}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 e=e=>{let t=(e.clientY-this.progressBarInner.getBoundingClientRect().top)/this.progressBarHeight;t=Math.max(Math.min(t,1),0),this.viewportElement.scrollTop=t*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight)},t=i=>{this.draggingProgressBar=!1,this.showProgressBar(),document.removeEventListener("mousemove",e),document.removeEventListener("mouseup",t)};this.progressBarInner.addEventListener("mousedown",(i=>{i.preventDefault(),this.draggingProgressBar=!0,document.addEventListener("mousemove",e),document.addEventListener("mouseup",t),e(i)}))}removeProgressBar(){this.progressBar&&(this.progressBar.remove(),this.progressBar=null)}layout(){this.isActive()&&(this.syncPages(),this.syncScrollPosition())}syncPages(){const e=this.Reveal.getConfig(),t=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),i=this.Reveal.getScale(),s="compact"===e.scrollLayout,a=this.viewportElement.offsetHeight,n=t.height*i,r=s?n:a;this.scrollTriggerHeight=s?n:a,this.viewportElement.style.setProperty("--page-height",r+"px"),this.viewportElement.style.scrollSnapType="string"==typeof e.scrollSnap?`y ${e.scrollSnap}`:"",this.slideTriggers=[];const o=Array.from(this.Reveal.getRevealElement().querySelectorAll(".scroll-page"));this.pages=o.map((i=>{const n=this.createPage({pageElement:i,slideElement:i.querySelector("section"),stickyElement:i.querySelector(".scroll-page-sticky"),contentElement:i.querySelector(".scroll-page-content"),backgroundElement:i.querySelector(".slide-background"),autoAnimateElements:i.querySelectorAll(".scroll-auto-animate-page"),autoAnimatePages:[]});n.pageElement.style.setProperty("--slide-height",!0===e.center?"auto":t.height+"px"),this.slideTriggers.push({page:n,activate:()=>this.activatePage(n),deactivate:()=>this.deactivatePage(n)}),this.createFragmentTriggersForPage(n),n.autoAnimateElements.length>0&&this.createAutoAnimateTriggersForPage(n);let o=Math.max(n.scrollTriggers.length-1,0);o+=n.autoAnimatePages.reduce(((e,t)=>e+Math.max(t.scrollTriggers.length-1,0)),n.autoAnimatePages.length),n.pageElement.querySelectorAll(".scroll-snap-point").forEach((e=>e.remove()));for(let e=0;e0?(n.pageHeight=a,n.pageElement.style.setProperty("--page-height",a+"px")):(n.pageHeight=r,n.pageElement.style.removeProperty("--page-height")),n.scrollPadding=this.scrollTriggerHeight*o,n.totalHeight=n.pageHeight+n.scrollPadding,n.pageElement.style.setProperty("--page-scroll-padding",n.scrollPadding+"px"),o>0?(n.stickyElement.style.position="sticky",n.stickyElement.style.top=Math.max((a-n.pageHeight)/2,0)+"px"):(n.stickyElement.style.position="relative",n.pageElement.style.scrollSnapAlign=n.pageHeight1?(this.progressBar||this.createProgressBar(),this.syncProgressBar()):this.removeProgressBar()}setTriggerRanges(){this.totalScrollTriggerCount=this.slideTriggers.reduce(((e,t)=>e+Math.max(t.page.scrollTriggers.length,1)),0);let e=0;this.slideTriggers.forEach(((t,i)=>{t.range=[e,e+Math.max(t.page.scrollTriggers.length,1)/this.totalScrollTriggerCount];const s=(t.range[1]-t.range[0])/t.page.scrollTriggers.length;t.page.scrollTriggers.forEach(((t,i)=>{t.range=[e+i*s,e+(i+1)*s]})),e=t.range[1]})),this.slideTriggers[this.slideTriggers.length-1].range[1]=1}createFragmentTriggersForPage(e,t){t=t||e.slideElement;const i=this.Reveal.fragments.sort(t.querySelectorAll(".fragment"),!0);return i.length&&(e.fragments=this.Reveal.fragments.sort(t.querySelectorAll(".fragment:not(.disabled)")),e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(-1,e.fragments,t)}}),i.forEach(((i,s)=>{e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(s,e.fragments,t)}})}))),e.scrollTriggers.length}createAutoAnimateTriggersForPage(e){e.autoAnimateElements.length>0&&this.slideTriggers.push(...Array.from(e.autoAnimateElements).map(((t,i)=>{let s=this.createPage({slideElement:t.querySelector("section"),contentElement:t,backgroundElement:t.querySelector(".slide-background")});return this.createFragmentTriggersForPage(s,s.slideElement),e.autoAnimatePages.push(s),{page:s,activate:()=>this.activatePage(s),deactivate:()=>this.deactivatePage(s)}})))}createPage(e){return e.scrollTriggers=[],e.indexh=parseInt(e.slideElement.getAttribute("data-index-h"),10),e.indexv=parseInt(e.slideElement.getAttribute("data-index-v"),10),e}syncProgressBar(){this.progressBarInner.querySelectorAll(".scrollbar-slide").forEach((e=>e.remove()));const e=this.viewportElement.scrollHeight,t=this.viewportElement.offsetHeight,i=t/e;this.progressBarHeight=this.progressBarInner.offsetHeight,this.playheadHeight=Math.max(i*this.progressBarHeight,8),this.progressBarScrollableHeight=this.progressBarHeight-this.playheadHeight;const s=t/e*this.progressBarHeight,a=Math.min(s/8,4);this.progressBarPlayhead.style.height=this.playheadHeight-a+"px",s>6?this.slideTriggers.forEach((e=>{const{page:t}=e;t.progressBarSlide=document.createElement("div"),t.progressBarSlide.className="scrollbar-slide",t.progressBarSlide.style.top=e.range[0]*this.progressBarHeight+"px",t.progressBarSlide.style.height=(e.range[1]-e.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.classList.toggle("has-triggers",t.scrollTriggers.length>0),this.progressBarInner.appendChild(t.progressBarSlide),t.scrollTriggerElements=t.scrollTriggers.map(((i,s)=>{const n=document.createElement("div");return n.className="scrollbar-trigger",n.style.top=(i.range[0]-e.range[0])*this.progressBarHeight+"px",n.style.height=(i.range[1]-i.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.appendChild(n),0===s&&(n.style.display="none"),n}))})):this.pages.forEach((e=>e.progressBarSlide=null))}syncScrollPosition(){const e=this.viewportElement.offsetHeight,t=e/this.viewportElement.scrollHeight,i=this.viewportElement.scrollTop,s=this.viewportElement.scrollHeight-e,a=Math.max(Math.min(i/s,1),0),n=Math.max(Math.min((i+e/2)/this.viewportElement.scrollHeight,1),0);let r;this.slideTriggers.forEach((e=>{const{page:i}=e;a>=e.range[0]-2*t&&a<=e.range[1]+2*t&&!i.loaded?(i.loaded=!0,this.Reveal.slideContent.load(i.slideElement)):i.loaded&&(i.loaded=!1,this.Reveal.slideContent.unload(i.slideElement)),a>=e.range[0]&&a<=e.range[1]?(this.activateTrigger(e),r=e.page):e.active&&this.deactivateTrigger(e)})),r&&r.scrollTriggers.forEach((e=>{n>=e.range[0]&&n<=e.range[1]?this.activateTrigger(e):e.active&&this.deactivateTrigger(e)})),this.setProgressBarValue(i/(this.viewportElement.scrollHeight-e))}setProgressBarValue(e){this.progressBar&&(this.progressBarPlayhead.style.transform=`translateY(${e*this.progressBarScrollableHeight}px)`,this.getAllPages().filter((e=>e.progressBarSlide)).forEach((e=>{e.progressBarSlide.classList.toggle("active",!0===e.active),e.scrollTriggers.forEach(((t,i)=>{e.scrollTriggerElements[i].classList.toggle("active",!0===e.active&&!0===t.active)}))})),this.showProgressBar())}showProgressBar(){this.progressBar.classList.add("visible"),clearTimeout(this.hideProgressBarTimeout),"auto"!==this.Reveal.getConfig().scrollProgress||this.draggingProgressBar||(this.hideProgressBarTimeout=setTimeout((()=>{this.progressBar&&this.progressBar.classList.remove("visible")}),500))}prev(){this.viewportElement.scrollTop-=this.scrollTriggerHeight}next(){this.viewportElement.scrollTop+=this.scrollTriggerHeight}scrollToSlide(e){if(this.active){const t=this.getScrollTriggerBySlide(e);t&&(this.viewportElement.scrollTop=t.range[0]*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight))}else this.activatedCallbacks.push((()=>this.scrollToSlide(e)))}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)}restoreScrollPosition(){const e=sessionStorage.getItem("reveal-scroll-top"),t=sessionStorage.getItem("reveal-scroll-origin");e&&t===location.origin+location.pathname&&(this.viewportElement.scrollTop=parseInt(e,10))}activatePage(e){if(!e.active){e.active=!0;const{slideElement:t,backgroundElement:i,contentElement:s,indexh:a,indexv:n}=e;s.style.display="block",t.classList.add("present"),i&&i.classList.add("present"),this.Reveal.setCurrentScrollPage(t,a,n),this.Reveal.backgrounds.bubbleSlideContrastClassToElement(t,this.viewportElement),Array.from(s.parentNode.querySelectorAll(".scroll-page-content")).forEach((e=>{e!==s&&(e.style.display="none")}))}}deactivatePage(e){e.active&&(e.active=!1,e.slideElement&&e.slideElement.classList.remove("present"),e.backgroundElement&&e.backgroundElement.classList.remove("present"))}activateTrigger(e){e.active||(e.active=!0,e.activate())}deactivateTrigger(e){e.active&&(e.active=!1,e.deactivate&&e.deactivate())}getSlideByIndices(e,t){const i=this.getAllPages().find((i=>i.indexh===e&&i.indexv===t));return i?i.slideElement:null}getScrollTriggerBySlide(e){return this.slideTriggers.find((t=>t.page.slideElement===e))}getAllPages(){return this.pages.flatMap((e=>[e,...e.autoAnimatePages||[]]))}onScroll(){this.syncScrollPosition(),this.storeScrollPosition()}get viewportElement(){return this.Reveal.getViewportElement()}}class C{constructor(e){this.Reveal=e}async activate(){const e=this.Reveal.getConfig(),i=t(this.Reveal.getRevealElement(),m),s=e.slideNumber&&/all|print/i.test(e.showSlideNumber),a=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),n=Math.floor(a.width*(1+e.margin)),r=Math.floor(a.height*(1+e.margin)),o=a.width,d=a.height;await new Promise(requestAnimationFrame),l("@page{size:"+n+"px "+r+"px; margin: 0px;}"),l(".reveal section>img, .reveal section>video, .reveal section>iframe{max-width: "+o+"px; max-height:"+d+"px}"),document.documentElement.classList.add("reveal-print","print-pdf"),document.body.style.width=n+"px",document.body.style.height=r+"px";const c=this.Reveal.getViewportElement();let h;if(c){const e=window.getComputedStyle(c);e&&e.background&&(h=e.background)}await new Promise(requestAnimationFrame),this.Reveal.layoutSlideContents(o,d),await new Promise(requestAnimationFrame);const u=i.map((e=>e.scrollHeight)),g=[],v=i[0].parentNode;let p=1;i.forEach((function(i,a){if(!1===i.classList.contains("stack")){let l=(n-o)/2,c=(r-d)/2;const v=u[a];let m=Math.max(Math.ceil(v/r),1);m=Math.min(m,e.pdfMaxPagesPerSlide),(1===m&&e.center||i.classList.contains("center"))&&(c=Math.max((r-v)/2,0));const f=document.createElement("div");if(g.push(f),f.className="pdf-page",f.style.height=(r+e.pdfPageHeightOffset)*m+"px",h&&(f.style.background=h),f.appendChild(i),i.style.left=l+"px",i.style.top=c+"px",i.style.width=o+"px",this.Reveal.slideContent.layout(i),i.slideBackgroundElement&&f.insertBefore(i.slideBackgroundElement,i),e.showNotes){const t=this.Reveal.getSlideNotes(i);if(t){const i=8,s="string"==typeof e.showNotes?e.showNotes:"inline",a=document.createElement("div");a.classList.add("speaker-notes"),a.classList.add("speaker-notes-pdf"),a.setAttribute("data-layout",s),a.innerHTML=t,"separate-page"===s?g.push(a):(a.style.left=i+"px",a.style.bottom=i+"px",a.style.width=n-2*i+"px",f.appendChild(a))}}if(s){const e=document.createElement("div");e.classList.add("slide-number"),e.classList.add("slide-number-pdf"),e.innerHTML=p++,f.appendChild(e)}if(e.pdfSeparateFragments){const e=this.Reveal.fragments.sort(f.querySelectorAll(".fragment"),!0);let t;e.forEach((function(e,i){t&&t.forEach((function(e){e.classList.remove("current-fragment")})),e.forEach((function(e){e.classList.add("visible","current-fragment")}),this);const a=f.cloneNode(!0);if(s){const e=i+1;a.querySelector(".slide-number-pdf").innerHTML+="."+e}g.push(a),t=e}),this),e.forEach((function(e){e.forEach((function(e){e.classList.remove("visible","current-fragment")}))}))}else t(f,".fragment:not(.fade-out)").forEach((function(e){e.classList.add("visible")}))}}),this),await new Promise(requestAnimationFrame),g.forEach((e=>v.appendChild(e))),this.Reveal.slideContent.layout(this.Reveal.getSlidesElement()),this.Reveal.dispatchEvent({type:"pdf-ready"}),c.classList.remove("loading-scroll-mode")}isActive(){return"print"===this.Reveal.getConfig().view}}class x{constructor(e){this.Reveal=e}configure(e,t){!1===e.fragments?this.disable():!1===t.fragments&&this.enable()}disable(){t(this.Reveal.getSlidesElement(),".fragment").forEach((e=>{e.classList.add("visible"),e.classList.remove("current-fragment")}))}enable(){t(this.Reveal.getSlidesElement(),".fragment").forEach((e=>{e.classList.remove("visible"),e.classList.remove("current-fragment")}))}availableRoutes(){let e=this.Reveal.getCurrentSlide();if(e&&this.Reveal.getConfig().fragments){let t=e.querySelectorAll(".fragment:not(.disabled)"),i=e.querySelectorAll(".fragment:not(.disabled):not(.visible)");return{prev:t.length-i.length>0,next:!!i.length}}return{prev:!1,next:!1}}sort(e,t=!1){e=Array.from(e);let i=[],s=[],a=[];e.forEach((e=>{if(e.hasAttribute("data-fragment-index")){let t=parseInt(e.getAttribute("data-fragment-index"),10);i[t]||(i[t]=[]),i[t].push(e)}else s.push([e])})),i=i.concat(s);let n=0;return i.forEach((e=>{e.forEach((e=>{a.push(e),e.setAttribute("data-fragment-index",n)})),n++})),!0===t?i:a}sortAll(){this.Reveal.getHorizontalSlides().forEach((e=>{let i=t(e,"section");i.forEach(((e,t)=>{this.sort(e.querySelectorAll(".fragment"))}),this),0===i.length&&this.sort(e.querySelectorAll(".fragment"))}))}update(e,t,i=this.Reveal.getCurrentSlide()){let s={shown:[],hidden:[]};if(i&&this.Reveal.getConfig().fragments&&(t=t||this.sort(i.querySelectorAll(".fragment"))).length){let a=0;if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment.visible")).pop();t&&(e=parseInt(t.getAttribute("data-fragment-index")||0,10))}Array.from(t).forEach(((t,i)=>{if(t.hasAttribute("data-fragment-index")&&(i=parseInt(t.getAttribute("data-fragment-index"),10)),a=Math.max(a,i),i<=e){let a=t.classList.contains("visible");t.classList.add("visible"),t.classList.remove("current-fragment"),i===e&&(this.Reveal.announceStatus(this.Reveal.getStatusText(t)),t.classList.add("current-fragment"),this.Reveal.slideContent.startEmbeddedContent(t)),a||(s.shown.push(t),this.Reveal.dispatchEvent({target:t,type:"visible",bubbles:!1}))}else{let e=t.classList.contains("visible");t.classList.remove("visible"),t.classList.remove("current-fragment"),e&&(this.Reveal.slideContent.stopEmbeddedContent(t),s.hidden.push(t),this.Reveal.dispatchEvent({target:t,type:"hidden",bubbles:!1}))}})),e="number"==typeof e?e:-1,e=Math.max(Math.min(e,a),-1),i.setAttribute("data-fragment",e)}return s.hidden.length&&this.Reveal.dispatchEvent({type:"fragmenthidden",data:{fragment:s.hidden[0],fragments:s.hidden}}),s.shown.length&&this.Reveal.dispatchEvent({type:"fragmentshown",data:{fragment:s.shown[0],fragments:s.shown}}),s}sync(e=this.Reveal.getCurrentSlide()){return this.sort(e.querySelectorAll(".fragment"))}goto(e,t=0){let i=this.Reveal.getCurrentSlide();if(i&&this.Reveal.getConfig().fragments){let s=this.sort(i.querySelectorAll(".fragment:not(.disabled)"));if(s.length){if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment:not(.disabled).visible")).pop();e=t?parseInt(t.getAttribute("data-fragment-index")||0,10):-1}e+=t;let a=this.update(e,s);return this.Reveal.controls.update(),this.Reveal.progress.update(),this.Reveal.getConfig().fragmentInURL&&this.Reveal.location.writeURL(),!(!a.shown.length&&!a.hidden.length)}}return!1}next(){return this.goto(null,1)}prev(){return this.goto(null,-1)}}class P{constructor(e){this.Reveal=e,this.active=!1,this.onSlideClicked=this.onSlideClicked.bind(this)}activate(){if(this.Reveal.getConfig().overview&&!this.Reveal.isScrollView()&&!this.isActive()){this.active=!0,this.Reveal.getRevealElement().classList.add("overview"),this.Reveal.cancelAutoSlide(),this.Reveal.getSlidesElement().appendChild(this.Reveal.getBackgroundsElement()),t(this.Reveal.getRevealElement(),m).forEach((e=>{e.classList.contains("stack")||e.addEventListener("click",this.onSlideClicked,!0)}));const e=70,i=this.Reveal.getComputedSlideSize();this.overviewSlideWidth=i.width+e,this.overviewSlideHeight=i.height+e,this.Reveal.getConfig().rtl&&(this.overviewSlideWidth=-this.overviewSlideWidth),this.Reveal.updateSlidesVisibility(),this.layout(),this.update(),this.Reveal.layout();const s=this.Reveal.getIndices();this.Reveal.dispatchEvent({type:"overviewshown",data:{indexh:s.h,indexv:s.v,currentSlide:this.Reveal.getCurrentSlide()}})}}layout(){this.Reveal.getHorizontalSlides().forEach(((e,i)=>{e.setAttribute("data-index-h",i),a(e,"translate3d("+i*this.overviewSlideWidth+"px, 0, 0)"),e.classList.contains("stack")&&t(e,"section").forEach(((e,t)=>{e.setAttribute("data-index-h",i),e.setAttribute("data-index-v",t),a(e,"translate3d(0, "+t*this.overviewSlideHeight+"px, 0)")}))})),Array.from(this.Reveal.getBackgroundsElement().childNodes).forEach(((e,i)=>{a(e,"translate3d("+i*this.overviewSlideWidth+"px, 0, 0)"),t(e,".slide-background").forEach(((e,t)=>{a(e,"translate3d(0, "+t*this.overviewSlideHeight+"px, 0)")}))}))}update(){const e=Math.min(window.innerWidth,window.innerHeight),t=Math.max(e/5,150)/e,i=this.Reveal.getIndices();this.Reveal.transformSlides({overview:["scale("+t+")","translateX("+-i.h*this.overviewSlideWidth+"px)","translateY("+-i.v*this.overviewSlideHeight+"px)"].join(" ")})}deactivate(){if(this.Reveal.getConfig().overview){this.active=!1,this.Reveal.getRevealElement().classList.remove("overview"),this.Reveal.getRevealElement().classList.add("overview-deactivating"),setTimeout((()=>{this.Reveal.getRevealElement().classList.remove("overview-deactivating")}),1),this.Reveal.getRevealElement().appendChild(this.Reveal.getBackgroundsElement()),t(this.Reveal.getRevealElement(),m).forEach((e=>{a(e,""),e.removeEventListener("click",this.onSlideClicked,!0)})),t(this.Reveal.getBackgroundsElement(),".slide-background").forEach((e=>{a(e,"")})),this.Reveal.transformSlides({overview:""});const e=this.Reveal.getIndices();this.Reveal.slide(e.h,e.v),this.Reveal.layout(),this.Reveal.cueAutoSlide(),this.Reveal.dispatchEvent({type:"overviewhidden",data:{indexh:e.h,indexv:e.v,currentSlide:this.Reveal.getCurrentSlide()}})}}toggle(e){"boolean"==typeof e?e?this.activate():this.deactivate():this.isActive()?this.deactivate():this.activate()}isActive(){return this.active}onSlideClicked(e){if(this.isActive()){e.preventDefault();let t=e.target;for(;t&&!t.nodeName.match(/section/gi);)t=t.parentNode;if(t&&!t.classList.contains("disabled")&&(this.deactivate(),t.nodeName.match(/section/gi))){let e=parseInt(t.getAttribute("data-index-h"),10),i=parseInt(t.getAttribute("data-index-v"),10);this.Reveal.slide(e,i)}}}}class T{constructor(e){this.Reveal=e,this.shortcuts={},this.bindings={},this.onDocumentKeyDown=this.onDocumentKeyDown.bind(this)}configure(e,t){"linear"===e.navigationMode?(this.shortcuts["→ , ↓ , SPACE , N , L , J"]="Next slide",this.shortcuts["← , ↑ , P , H , K"]="Previous 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this.Reveal[t]&&this.Reveal[t].call(),u=!0}!1===u&&(u=!0,80===i||33===i?this.Reveal.prev({skipFragments:e.altKey}):78===i||34===i?this.Reveal.next({skipFragments:e.altKey}):72===i||37===i?e.shiftKey?this.Reveal.slide(0):!this.Reveal.overview.isActive()&&h?t.rtl?this.Reveal.next({skipFragments:e.altKey}):this.Reveal.prev({skipFragments:e.altKey}):this.Reveal.left({skipFragments:e.altKey}):76===i||39===i?e.shiftKey?this.Reveal.slide(this.Reveal.getHorizontalSlides().length-1):!this.Reveal.overview.isActive()&&h?t.rtl?this.Reveal.prev({skipFragments:e.altKey}):this.Reveal.next({skipFragments:e.altKey}):this.Reveal.right({skipFragments:e.altKey}):75===i||38===i?e.shiftKey?this.Reveal.slide(void 0,0):!this.Reveal.overview.isActive()&&h?this.Reveal.prev({skipFragments:e.altKey}):this.Reveal.up({skipFragments:e.altKey}):74===i||40===i?e.shiftKey?this.Reveal.slide(void 0,Number.MAX_VALUE):!this.Reveal.overview.isActive()&&h?this.Reveal.next({skipFragments:e.altKey}):this.Reveal.down({skipFragments:e.altKey}):36===i?this.Reveal.slide(0):35===i?this.Reveal.slide(this.Reveal.getHorizontalSlides().length-1):32===i?(this.Reveal.overview.isActive()&&this.Reveal.overview.deactivate(),e.shiftKey?this.Reveal.prev({skipFragments:e.altKey}):this.Reveal.next({skipFragments:e.altKey})):[58,59,66,86,190].includes(i)||191===i&&!e.shiftKey?this.Reveal.togglePause():70===i?o(t.embedded?this.Reveal.getViewportElement():document.documentElement):65===i?t.autoSlideStoppable&&this.Reveal.toggleAutoSlide(s):71===i?t.jumpToSlide&&this.Reveal.toggleJumpToSlide():67===i&&this.Reveal.isOverlayOpen()?this.Reveal.closeOverlay():63!==i&&191!==i||!e.shiftKey?112===i?this.Reveal.toggleHelp():u=!1:this.Reveal.toggleHelp()),u?e.preventDefault&&e.preventDefault():27===i||79===i?(!1===this.Reveal.closeOverlay()&&this.Reveal.overview.toggle(),e.preventDefault&&e.preventDefault()):13===i&&this.Reveal.overview.isActive()&&(this.Reveal.overview.deactivate(),e.preventDefault&&e.preventDefault()),this.Reveal.cueAutoSlide()}}class N{MAX_REPLACE_STATE_FREQUENCY=1e3;constructor(e){this.Reveal=e,this.writeURLTimeout=0,this.replaceStateTimestamp=0,this.onWindowHashChange=this.onWindowHashChange.bind(this)}bind(){window.addEventListener("hashchange",this.onWindowHashChange,!1)}unbind(){window.removeEventListener("hashchange",this.onWindowHashChange,!1)}getIndicesFromHash(e=window.location.hash,t={}){let i=e.replace(/^#\/?/,""),s=i.split("/");if(/^[0-9]*$/.test(s[0])||!i.length){const e=this.Reveal.getConfig();let i,a=e.hashOneBasedIndex||t.oneBasedIndex?1:0,n=parseInt(s[0],10)-a||0,r=parseInt(s[1],10)-a||0;return e.fragmentInURL&&(i=parseInt(s[2],10),isNaN(i)&&(i=void 0)),{h:n,v:r,f:i}}{let e,t;/\/[-\d]+$/g.test(i)&&(t=parseInt(i.split("/").pop(),10),t=isNaN(t)?void 0:t,i=i.split("/").shift());try{e=document.getElementById(decodeURIComponent(i)).closest(".slides section")}catch(e){}if(e)return{...this.Reveal.getIndices(e),f:t}}return null}readURL(){const e=this.Reveal.getIndices(),t=this.getIndicesFromHash();t?t.h===e.h&&t.v===e.v&&void 0===t.f||this.Reveal.slide(t.h,t.v,t.f):this.Reveal.slide(e.h||0,e.v||0)}writeURL(e){let t=this.Reveal.getConfig(),i=this.Reveal.getCurrentSlide();if(clearTimeout(this.writeURLTimeout),"number"==typeof e)this.writeURLTimeout=setTimeout(this.writeURL,e);else if(i){let e=this.getHash();t.history?window.location.hash=e:t.hash&&("/"===e?this.debouncedReplaceState(window.location.pathname+window.location.search):this.debouncedReplaceState("#"+e))}}replaceState(e){window.history.replaceState(null,null,e),this.replaceStateTimestamp=Date.now()}debouncedReplaceState(e){clearTimeout(this.replaceStateTimeout),Date.now()-this.replaceStateTimestamp>this.MAX_REPLACE_STATE_FREQUENCY?this.replaceState(e):this.replaceStateTimeout=setTimeout((()=>this.replaceState(e)),this.MAX_REPLACE_STATE_FREQUENCY)}getHash(e){let t="/",i=e||this.Reveal.getCurrentSlide(),s=i?i.getAttribute("id"):null;s&&(s=encodeURIComponent(s));let a=this.Reveal.getIndices(e);if(this.Reveal.getConfig().fragmentInURL||(a.f=void 0),"string"==typeof s&&s.length)t="/"+s,a.f>=0&&(t+="/"+a.f);else{let e=this.Reveal.getConfig().hashOneBasedIndex?1:0;(a.h>0||a.v>0||a.f>=0)&&(t+=a.h+e),(a.v>0||a.f>=0)&&(t+="/"+(a.v+e)),a.f>=0&&(t+="/"+a.f)}return t}onWindowHashChange(e){this.readURL()}}class I{constructor(e){this.Reveal=e,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 e=this.Reveal.getConfig().rtl,i=this.Reveal.getRevealElement();this.element=document.createElement("aside"),this.element.className="controls",this.element.innerHTML=`
\n\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\tUnable to load iframe. This is likely due to the site's policy (x-frame-options). \n\t\t\t\t \n\t\t\t
`,this.dom.querySelector("iframe").addEventListener("load",(e=>{this.dom.dataset.state="loaded"}),!1),this.dom.querySelector(".r-overlay-close").addEventListener("click",(e=>{this.close(),e.preventDefault()}),!1),this.dom.querySelector(".r-overlay-external").addEventListener("click",(e=>{this.close()}),!1),this.Reveal.dispatchEvent({type:"previewiframe",data:{url:e}})}previewMedia(e,t,i){if("image"!==t&&"video"!==t)return void console.warn("Please specify a valid media type to preview (image|video)");this.close(),i=i||"scale-down",this.createOverlay("r-overlay-preview"),this.dom.dataset.state="loading",this.dom.dataset.previewFit=i,this.viewport.innerHTML='\n\t\t\t
\n\t\t\t
';const s=this.dom.querySelector(".r-overlay-content");if("image"===t){this.state={previewImage:e,previewFit:i};const t=document.createElement("img",{});t.src=e,s.appendChild(t),t.addEventListener("load",(()=>{this.dom.dataset.state="loaded"}),!1),t.addEventListener("error",(()=>{this.dom.dataset.state="error",s.innerHTML='Unable to load image. '}),!1),this.dom.style.cursor="zoom-out",this.dom.addEventListener("click",(e=>{this.close()}),!1),this.Reveal.dispatchEvent({type:"previewimage",data:{url:e}})}else{if("video"!==t)throw new Error("Please specify a valid media type to preview");{this.state={previewVideo:e,previewFit:i};const t=document.createElement("video");t.autoplay="false"!==this.dom.dataset.previewAutoplay,t.controls="false"!==this.dom.dataset.previewControls,t.loop="true"===this.dom.dataset.previewLoop,t.muted="true"===this.dom.dataset.previewMuted,t.playsInline=!0,t.src=e,s.appendChild(t),t.addEventListener("loadeddata",(()=>{this.dom.dataset.state="loaded"}),!1),t.addEventListener("error",(()=>{this.dom.dataset.state="error",s.innerHTML='Unable to load video. '}),!1),this.Reveal.dispatchEvent({type:"previewvideo",data:{url:e}})}}this.dom.querySelector(".r-overlay-close").addEventListener("click",(e=>{this.close(),e.preventDefault()}),!1)}previewImage(e,t){this.previewMedia(e,"image",t)}previewVideo(e,t){this.previewMedia(e,"video",t)}toggleHelp(e){"boolean"==typeof e?e?this.showHelp():this.close():this.dom?this.close():this.showHelp()}showHelp(){if(this.Reveal.getConfig().help){this.close(),this.createOverlay("r-overlay-help");let e='Keyboard Shortcuts
',t=this.Reveal.keyboard.getShortcuts(),i=this.Reveal.keyboard.getBindings();e+="KEY ACTION ";for(let i in t)e+=`${i} ${t[i]} ${i[t].key} ${i[t].description}
",this.viewport.innerHTML=`\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t
${e}
\n\t\t\t\t
No notes on this slide. 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W{constructor(e,t){this.diameter=100,this.diameter2=this.diameter/2,this.thickness=6,this.playing=!1,this.progress=0,this.progressOffset=1,this.container=e,this.progressCheck=t,this.canvas=document.createElement("canvas"),this.canvas.className="playback",this.canvas.width=this.diameter,this.canvas.height=this.diameter,this.canvas.style.width=this.diameter2+"px",this.canvas.style.height=this.diameter2+"px",this.context=this.canvas.getContext("2d"),this.container.appendChild(this.canvas),this.render()}setPlaying(e){const t=this.playing;this.playing=e,!t&&this.playing?this.animate():this.render()}animate(){const e=this.progress;this.progress=this.progressCheck(),e>.8&&this.progress<.2&&(this.progressOffset=this.progress),this.render(),this.playing&&requestAnimationFrame(this.animate.bind(this))}render(){let e=this.playing?this.progress:0,t=this.diameter2-this.thickness,i=this.diameter2,s=this.diameter2,a=28;this.progressOffset+=.1*(1-this.progressOffset);const n=-Math.PI/2+e*(2*Math.PI),r=-Math.PI/2+this.progressOffset*(2*Math.PI);this.context.save(),this.context.clearRect(0,0,this.diameter,this.diameter),this.context.beginPath(),this.context.arc(i,s,t+4,0,2*Math.PI,!1),this.context.fillStyle="rgba( 0, 0, 0, 0.4 )",this.context.fill(),this.context.beginPath(),this.context.arc(i,s,t,0,2*Math.PI,!1),this.context.lineWidth=this.thickness,this.context.strokeStyle="rgba( 255, 255, 255, 0.2 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e=this.Reveal.getState();this.active=!1,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(e),this.slideHTMLBeforeActivation=null}toggle(e){"boolean"==typeof e?e?this.activate():this.deactivate():this.isActive()?this.deactivate():this.activate()}isActive(){return 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t=(e.clientY-this.progressBarInner.getBoundingClientRect().top)/this.progressBarHeight;t=Math.max(Math.min(t,1),0),this.viewportElement.scrollTop=t*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight)},t=i=>{this.draggingProgressBar=!1,this.showProgressBar(),document.removeEventListener("mousemove",e),document.removeEventListener("mouseup",t)};this.progressBarInner.addEventListener("mousedown",(i=>{i.preventDefault(),this.draggingProgressBar=!0,document.addEventListener("mousemove",e),document.addEventListener("mouseup",t),e(i)}))}removeProgressBar(){this.progressBar&&(this.progressBar.remove(),this.progressBar=null)}layout(){this.isActive()&&(this.syncPages(),this.syncScrollPosition())}syncPages(){const e=this.Reveal.getConfig(),t=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),i=this.Reveal.getScale(),s="compact"===e.scrollLayout,a=this.viewportElement.offsetHeight,n=t.height*i,r=s?n:a;this.scrollTriggerHeight=s?n:a,this.viewportElement.style.setProperty("--page-height",r+"px"),this.viewportElement.style.scrollSnapType="string"==typeof e.scrollSnap?`y ${e.scrollSnap}`:"",this.slideTriggers=[];const o=Array.from(this.Reveal.getRevealElement().querySelectorAll(".scroll-page"));this.pages=o.map((i=>{const n=this.createPage({pageElement:i,slideElement:i.querySelector("section"),stickyElement:i.querySelector(".scroll-page-sticky"),contentElement:i.querySelector(".scroll-page-content"),backgroundElement:i.querySelector(".slide-background"),autoAnimateElements:i.querySelectorAll(".scroll-auto-animate-page"),autoAnimatePages:[]});n.pageElement.style.setProperty("--slide-height",!0===e.center?"auto":t.height+"px"),this.slideTriggers.push({page:n,activate:()=>this.activatePage(n),deactivate:()=>this.deactivatePage(n)}),this.createFragmentTriggersForPage(n),n.autoAnimateElements.length>0&&this.createAutoAnimateTriggersForPage(n);let o=Math.max(n.scrollTriggers.length-1,0);o+=n.autoAnimatePages.reduce(((e,t)=>e+Math.max(t.scrollTriggers.length-1,0)),n.autoAnimatePages.length),n.pageElement.querySelectorAll(".scroll-snap-point").forEach((e=>e.remove()));for(let e=0;e0?(n.pageHeight=a,n.pageElement.style.setProperty("--page-height",a+"px")):(n.pageHeight=r,n.pageElement.style.removeProperty("--page-height")),n.scrollPadding=this.scrollTriggerHeight*o,n.totalHeight=n.pageHeight+n.scrollPadding,n.pageElement.style.setProperty("--page-scroll-padding",n.scrollPadding+"px"),o>0?(n.stickyElement.style.position="sticky",n.stickyElement.style.top=Math.max((a-n.pageHeight)/2,0)+"px"):(n.stickyElement.style.position="relative",n.pageElement.style.scrollSnapAlign=n.pageHeight1?(this.progressBar||this.createProgressBar(),this.syncProgressBar()):this.removeProgressBar()}setTriggerRanges(){this.totalScrollTriggerCount=this.slideTriggers.reduce(((e,t)=>e+Math.max(t.page.scrollTriggers.length,1)),0);let e=0;this.slideTriggers.forEach(((t,i)=>{t.range=[e,e+Math.max(t.page.scrollTriggers.length,1)/this.totalScrollTriggerCount];const s=(t.range[1]-t.range[0])/t.page.scrollTriggers.length;t.page.scrollTriggers.forEach(((t,i)=>{t.range=[e+i*s,e+(i+1)*s]})),e=t.range[1]})),this.slideTriggers[this.slideTriggers.length-1].range[1]=1}createFragmentTriggersForPage(e,t){t=t||e.slideElement;const i=this.Reveal.fragments.sort(t.querySelectorAll(".fragment"),!0);return i.length&&(e.fragments=this.Reveal.fragments.sort(t.querySelectorAll(".fragment:not(.disabled)")),e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(-1,e.fragments,t)}}),i.forEach(((i,s)=>{e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(s,e.fragments,t)}})}))),e.scrollTriggers.length}createAutoAnimateTriggersForPage(e){e.autoAnimateElements.length>0&&this.slideTriggers.push(...Array.from(e.autoAnimateElements).map(((t,i)=>{let s=this.createPage({slideElement:t.querySelector("section"),contentElement:t,backgroundElement:t.querySelector(".slide-background")});return this.createFragmentTriggersForPage(s,s.slideElement),e.autoAnimatePages.push(s),{page:s,activate:()=>this.activatePage(s),deactivate:()=>this.deactivatePage(s)}})))}createPage(e){return e.scrollTriggers=[],e.indexh=parseInt(e.slideElement.getAttribute("data-index-h"),10),e.indexv=parseInt(e.slideElement.getAttribute("data-index-v"),10),e}syncProgressBar(){this.progressBarInner.querySelectorAll(".scrollbar-slide").forEach((e=>e.remove()));const e=this.viewportElement.scrollHeight,t=this.viewportElement.offsetHeight,i=t/e;this.progressBarHeight=this.progressBarInner.offsetHeight,this.playheadHeight=Math.max(i*this.progressBarHeight,8),this.progressBarScrollableHeight=this.progressBarHeight-this.playheadHeight;const s=t/e*this.progressBarHeight,a=Math.min(s/8,4);this.progressBarPlayhead.style.height=this.playheadHeight-a+"px",s>6?this.slideTriggers.forEach((e=>{const{page:t}=e;t.progressBarSlide=document.createElement("div"),t.progressBarSlide.className="scrollbar-slide",t.progressBarSlide.style.top=e.range[0]*this.progressBarHeight+"px",t.progressBarSlide.style.height=(e.range[1]-e.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.classList.toggle("has-triggers",t.scrollTriggers.length>0),this.progressBarInner.appendChild(t.progressBarSlide),t.scrollTriggerElements=t.scrollTriggers.map(((i,s)=>{const n=document.createElement("div");return n.className="scrollbar-trigger",n.style.top=(i.range[0]-e.range[0])*this.progressBarHeight+"px",n.style.height=(i.range[1]-i.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.appendChild(n),0===s&&(n.style.display="none"),n}))})):this.pages.forEach((e=>e.progressBarSlide=null))}syncScrollPosition(){const e=this.viewportElement.offsetHeight,t=e/this.viewportElement.scrollHeight,i=this.viewportElement.scrollTop,s=this.viewportElement.scrollHeight-e,a=Math.max(Math.min(i/s,1),0),n=Math.max(Math.min((i+e/2)/this.viewportElement.scrollHeight,1),0);let r;this.slideTriggers.forEach((e=>{const{page:i}=e;a>=e.range[0]-2*t&&a<=e.range[1]+2*t&&!i.loaded?(i.loaded=!0,this.Reveal.slideContent.load(i.slideElement)):i.loaded&&(i.loaded=!1,this.Reveal.slideContent.unload(i.slideElement)),a>=e.range[0]&&a<=e.range[1]?(this.activateTrigger(e),r=e.page):e.active&&this.deactivateTrigger(e)})),r&&r.scrollTriggers.forEach((e=>{n>=e.range[0]&&n<=e.range[1]?this.activateTrigger(e):e.active&&this.deactivateTrigger(e)})),this.setProgressBarValue(i/(this.viewportElement.scrollHeight-e))}setProgressBarValue(e){this.progressBar&&(this.progressBarPlayhead.style.transform=`translateY(${e*this.progressBarScrollableHeight}px)`,this.getAllPages().filter((e=>e.progressBarSlide)).forEach((e=>{e.progressBarSlide.classList.toggle("active",!0===e.active),e.scrollTriggers.forEach(((t,i)=>{e.scrollTriggerElements[i].classList.toggle("active",!0===e.active&&!0===t.active)}))})),this.showProgressBar())}showProgressBar(){this.progressBar.classList.add("visible"),clearTimeout(this.hideProgressBarTimeout),"auto"!==this.Reveal.getConfig().scrollProgress||this.draggingProgressBar||(this.hideProgressBarTimeout=setTimeout((()=>{this.progressBar&&this.progressBar.classList.remove("visible")}),500))}prev(){this.viewportElement.scrollTop-=this.scrollTriggerHeight}next(){this.viewportElement.scrollTop+=this.scrollTriggerHeight}scrollToSlide(e){if(this.active){const t=this.getScrollTriggerBySlide(e);t&&(this.viewportElement.scrollTop=t.range[0]*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight))}else this.activatedCallbacks.push((()=>this.scrollToSlide(e)))}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)}restoreScrollPosition(){const e=sessionStorage.getItem("reveal-scroll-top"),t=sessionStorage.getItem("reveal-scroll-origin");e&&t===location.origin+location.pathname&&(this.viewportElement.scrollTop=parseInt(e,10))}activatePage(e){if(!e.active){e.active=!0;const{slideElement:t,backgroundElement:i,contentElement:s,indexh:a,indexv:n}=e;s.style.display="block",t.classList.add("present"),i&&i.classList.add("present"),this.Reveal.setCurrentScrollPage(t,a,n),this.Reveal.backgrounds.bubbleSlideContrastClassToElement(t,this.viewportElement),Array.from(s.parentNode.querySelectorAll(".scroll-page-content")).forEach((e=>{e!==s&&(e.style.display="none")}))}}deactivatePage(e){e.active&&(e.active=!1,e.slideElement&&e.slideElement.classList.remove("present"),e.backgroundElement&&e.backgroundElement.classList.remove("present"))}activateTrigger(e){e.active||(e.active=!0,e.activate())}deactivateTrigger(e){e.active&&(e.active=!1,e.deactivate&&e.deactivate())}getSlideByIndices(e,t){const i=this.getAllPages().find((i=>i.indexh===e&&i.indexv===t));return i?i.slideElement:null}getScrollTriggerBySlide(e){return this.slideTriggers.find((t=>t.page.slideElement===e))}getAllPages(){return this.pages.flatMap((e=>[e,...e.autoAnimatePages||[]]))}onScroll(){this.syncScrollPosition(),this.storeScrollPosition()}get viewportElement(){return this.Reveal.getViewportElement()}}class C{constructor(e){this.Reveal=e}async activate(){const e=this.Reveal.getConfig(),i=t(this.Reveal.getRevealElement(),m),s=e.slideNumber&&/all|print/i.test(e.showSlideNumber),a=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),n=Math.floor(a.width*(1+e.margin)),r=Math.floor(a.height*(1+e.margin)),o=a.width,d=a.height;await new Promise(requestAnimationFrame),l("@page{size:"+n+"px "+r+"px; margin: 0px;}"),l(".reveal section>img, .reveal section>video, .reveal section>iframe{max-width: "+o+"px; max-height:"+d+"px}"),document.documentElement.classList.add("reveal-print","print-pdf"),document.body.style.width=n+"px",document.body.style.height=r+"px";const c=this.Reveal.getViewportElement();let h;if(c){const e=window.getComputedStyle(c);e&&e.background&&(h=e.background)}await new Promise(requestAnimationFrame),this.Reveal.layoutSlideContents(o,d),await new Promise(requestAnimationFrame);const u=i.map((e=>e.scrollHeight)),g=[],v=i[0].parentNode;let p=1;i.forEach((function(i,a){if(!1===i.classList.contains("stack")){let l=(n-o)/2,c=(r-d)/2;const v=u[a];let m=Math.max(Math.ceil(v/r),1);m=Math.min(m,e.pdfMaxPagesPerSlide),(1===m&&e.center||i.classList.contains("center"))&&(c=Math.max((r-v)/2,0));const f=document.createElement("div");if(g.push(f),f.className="pdf-page",f.style.height=(r+e.pdfPageHeightOffset)*m+"px",h&&(f.style.background=h),f.appendChild(i),i.style.left=l+"px",i.style.top=c+"px",i.style.width=o+"px",this.Reveal.slideContent.layout(i),i.slideBackgroundElement&&f.insertBefore(i.slideBackgroundElement,i),e.showNotes){const t=this.Reveal.getSlideNotes(i);if(t){const i=8,s="string"==typeof e.showNotes?e.showNotes:"inline",a=document.createElement("div");a.classList.add("speaker-notes"),a.classList.add("speaker-notes-pdf"),a.setAttribute("data-layout",s),a.innerHTML=t,"separate-page"===s?g.push(a):(a.style.left=i+"px",a.style.bottom=i+"px",a.style.width=n-2*i+"px",f.appendChild(a))}}if(s){const e=document.createElement("div");e.classList.add("slide-number"),e.classList.add("slide-number-pdf"),e.innerHTML=p++,f.appendChild(e)}if(e.pdfSeparateFragments){const e=this.Reveal.fragments.sort(f.querySelectorAll(".fragment"),!0);let t;e.forEach((function(e,i){t&&t.forEach((function(e){e.classList.remove("current-fragment")})),e.forEach((function(e){e.classList.add("visible","current-fragment")}),this);const a=f.cloneNode(!0);if(s){const e=i+1;a.querySelector(".slide-number-pdf").innerHTML+="."+e}g.push(a),t=e}),this),e.forEach((function(e){e.forEach((function(e){e.classList.remove("visible","current-fragment")}))}))}else t(f,".fragment:not(.fade-out)").forEach((function(e){e.classList.add("visible")}))}}),this),await new Promise(requestAnimationFrame),g.forEach((e=>v.appendChild(e))),this.Reveal.slideContent.layout(this.Reveal.getSlidesElement()),this.Reveal.dispatchEvent({type:"pdf-ready"}),c.classList.remove("loading-scroll-mode")}isActive(){return"print"===this.Reveal.getConfig().view}}class x{constructor(e){this.Reveal=e}configure(e,t){!1===e.fragments?this.disable():!1===t.fragments&&this.enable()}disable(){t(this.Reveal.getSlidesElement(),".fragment").forEach((e=>{e.classList.add("visible"),e.classList.remove("current-fragment")}))}enable(){t(this.Reveal.getSlidesElement(),".fragment").forEach((e=>{e.classList.remove("visible"),e.classList.remove("current-fragment")}))}availableRoutes(){let e=this.Reveal.getCurrentSlide();if(e&&this.Reveal.getConfig().fragments){let t=e.querySelectorAll(".fragment:not(.disabled)"),i=e.querySelectorAll(".fragment:not(.disabled):not(.visible)");return{prev:t.length-i.length>0,next:!!i.length}}return{prev:!1,next:!1}}sort(e,t=!1){e=Array.from(e);let i=[],s=[],a=[];e.forEach((e=>{if(e.hasAttribute("data-fragment-index")){let t=parseInt(e.getAttribute("data-fragment-index"),10);i[t]||(i[t]=[]),i[t].push(e)}else s.push([e])})),i=i.concat(s);let n=0;return i.forEach((e=>{e.forEach((e=>{a.push(e),e.setAttribute("data-fragment-index",n)})),n++})),!0===t?i:a}sortAll(){this.Reveal.getHorizontalSlides().forEach((e=>{let i=t(e,"section");i.forEach(((e,t)=>{this.sort(e.querySelectorAll(".fragment"))}),this),0===i.length&&this.sort(e.querySelectorAll(".fragment"))}))}update(e,t,i=this.Reveal.getCurrentSlide()){let s={shown:[],hidden:[]};if(i&&this.Reveal.getConfig().fragments&&(t=t||this.sort(i.querySelectorAll(".fragment"))).length){let a=0;if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment.visible")).pop();t&&(e=parseInt(t.getAttribute("data-fragment-index")||0,10))}Array.from(t).forEach(((t,i)=>{if(t.hasAttribute("data-fragment-index")&&(i=parseInt(t.getAttribute("data-fragment-index"),10)),a=Math.max(a,i),i<=e){let a=t.classList.contains("visible");t.classList.add("visible"),t.classList.remove("current-fragment"),i===e&&(this.Reveal.announceStatus(this.Reveal.getStatusText(t)),t.classList.add("current-fragment"),this.Reveal.slideContent.startEmbeddedContent(t)),a||(s.shown.push(t),this.Reveal.dispatchEvent({target:t,type:"visible",bubbles:!1}))}else{let e=t.classList.contains("visible");t.classList.remove("visible"),t.classList.remove("current-fragment"),e&&(this.Reveal.slideContent.stopEmbeddedContent(t),s.hidden.push(t),this.Reveal.dispatchEvent({target:t,type:"hidden",bubbles:!1}))}})),e="number"==typeof e?e:-1,e=Math.max(Math.min(e,a),-1),i.setAttribute("data-fragment",e)}return s.hidden.length&&this.Reveal.dispatchEvent({type:"fragmenthidden",data:{fragment:s.hidden[0],fragments:s.hidden}}),s.shown.length&&this.Reveal.dispatchEvent({type:"fragmentshown",data:{fragment:s.shown[0],fragments:s.shown}}),s}sync(e=this.Reveal.getCurrentSlide()){return this.sort(e.querySelectorAll(".fragment"))}goto(e,t=0){let i=this.Reveal.getCurrentSlide();if(i&&this.Reveal.getConfig().fragments){let s=this.sort(i.querySelectorAll(".fragment:not(.disabled)"));if(s.length){if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment:not(.disabled).visible")).pop();e=t?parseInt(t.getAttribute("data-fragment-index")||0,10):-1}e+=t;let a=this.update(e,s);return this.Reveal.controls.update(),this.Reveal.progress.update(),this.Reveal.getConfig().fragmentInURL&&this.Reveal.location.writeURL(),!(!a.shown.length&&!a.hidden.length)}}return!1}next(){return this.goto(null,1)}prev(){return this.goto(null,-1)}}class P{constructor(e){this.Reveal=e,this.active=!1,this.onSlideClicked=this.onSlideClicked.bind(this)}activate(){if(this.Reveal.getConfig().overview&&!this.Reveal.isScrollView()&&!this.isActive()){this.active=!0,this.Reveal.getRevealElement().classList.add("overview"),this.Reveal.cancelAutoSlide(),this.Reveal.getSlidesElement().appendChild(this.Reveal.getBackgroundsElement()),t(this.Reveal.getRevealElement(),m).forEach((e=>{e.classList.contains("stack")||e.addEventListener("click",this.onSlideClicked,!0)}));const e=70,i=this.Reveal.getComputedSlideSize();this.overviewSlideWidth=i.width+e,this.overviewSlideHeight=i.height+e,this.Reveal.getConfig().rtl&&(this.overviewSlideWidth=-this.overviewSlideWidth),this.Reveal.updateSlidesVisibility(),this.layout(),this.update(),this.Reveal.layout();const s=this.Reveal.getIndices();this.Reveal.dispatchEvent({type:"overviewshown",data:{indexh:s.h,indexv:s.v,currentSlide:this.Reveal.getCurrentSlide()}})}}layout(){this.Reveal.getHorizontalSlides().forEach(((e,i)=>{e.setAttribute("data-index-h",i),a(e,"translate3d("+i*this.overviewSlideWidth+"px, 0, 0)"),e.classList.contains("stack")&&t(e,"section").forEach(((e,t)=>{e.setAttribute("data-index-h",i),e.setAttribute("data-index-v",t),a(e,"translate3d(0, "+t*this.overviewSlideHeight+"px, 0)")}))})),Array.from(this.Reveal.getBackgroundsElement().childNodes).forEach(((e,i)=>{a(e,"translate3d("+i*this.overviewSlideWidth+"px, 0, 0)"),t(e,".slide-background").forEach(((e,t)=>{a(e,"translate3d(0, "+t*this.overviewSlideHeight+"px, 0)")}))}))}update(){const e=Math.min(window.innerWidth,window.innerHeight),t=Math.max(e/5,150)/e,i=this.Reveal.getIndices();this.Reveal.transformSlides({overview:["scale("+t+")","translateX("+-i.h*this.overviewSlideWidth+"px)","translateY("+-i.v*this.overviewSlideHeight+"px)"].join(" ")})}deactivate(){if(this.Reveal.getConfig().overview){this.active=!1,this.Reveal.getRevealElement().classList.remove("overview"),this.Reveal.getRevealElement().classList.add("overview-deactivating"),setTimeout((()=>{this.Reveal.getRevealElement().classList.remove("overview-deactivating")}),1),this.Reveal.getRevealElement().appendChild(this.Reveal.getBackgroundsElement()),t(this.Reveal.getRevealElement(),m).forEach((e=>{a(e,""),e.removeEventListener("click",this.onSlideClicked,!0)})),t(this.Reveal.getBackgroundsElement(),".slide-background").forEach((e=>{a(e,"")})),this.Reveal.transformSlides({overview:""});const e=this.Reveal.getIndices();this.Reveal.slide(e.h,e.v),this.Reveal.layout(),this.Reveal.cueAutoSlide(),this.Reveal.dispatchEvent({type:"overviewhidden",data:{indexh:e.h,indexv:e.v,currentSlide:this.Reveal.getCurrentSlide()}})}}toggle(e){"boolean"==typeof e?e?this.activate():this.deactivate():this.isActive()?this.deactivate():this.activate()}isActive(){return this.active}onSlideClicked(e){if(this.isActive()){e.preventDefault();let t=e.target;for(;t&&!t.nodeName.match(/section/gi);)t=t.parentNode;if(t&&!t.classList.contains("disabled")&&(this.deactivate(),t.nodeName.match(/section/gi))){let e=parseInt(t.getAttribute("data-index-h"),10),i=parseInt(t.getAttribute("data-index-v"),10);this.Reveal.slide(e,i)}}}}class T{constructor(e){this.Reveal=e,this.shortcuts={},this.bindings={},this.onDocumentKeyDown=this.onDocumentKeyDown.bind(this)}configure(e,t){"linear"===e.navigationMode?(this.shortcuts["→ , ↓ , SPACE , N , L , J"]="Next slide",this.shortcuts["← , ↑ , P , H , K"]="Previous slide"):(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"}bind(){document.addEventListener("keydown",this.onDocumentKeyDown,!1)}unbind(){document.removeEventListener("keydown",this.onDocumentKeyDown,!1)}addKeyBinding(e,t){"object"==typeof e&&e.keyCode?this.bindings[e.keyCode]={callback:t,key:e.key,description:e.description}:this.bindings[e]={callback:t,key:null,description:null}}removeKeyBinding(e){delete 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diff --git a/dist/reveal.js.map b/dist/reveal.js.map
index df920ec3..b9dcbcfa 100644
--- a/dist/reveal.js.map
+++ b/dist/reveal.js.map
@@ -1 +1 @@
-{"version":3,"file":"reveal.js","sources":["../js/utils/util.js","../js/utils/device.js","../node_modules/fitty/dist/fitty.module.js","../js/controllers/slidecontent.js","../js/utils/constants.js","../js/controllers/slidenumber.js","../js/controllers/jumptoslide.js","../js/utils/color.js","../js/controllers/backgrounds.js","../js/controllers/autoanimate.js","../js/controllers/scrollview.js","../js/controllers/printview.js","../js/controllers/fragments.js","../js/controllers/overview.js","../js/controllers/keyboard.js","../js/controllers/location.js","../js/controllers/controls.js","../js/controllers/progress.js","../js/controllers/pointer.js","../js/utils/loader.js","../js/controllers/plugins.js","../js/controllers/overlay.js","../js/controllers/touch.js","../js/controllers/focus.js","../js/controllers/notes.js","../js/components/playback.js","../js/config.js","../js/reveal.js","../js/index.js"],"sourcesContent":["/**\n * Extend object a with the properties of object b.\n * If there's a conflict, object b takes precedence.\n *\n * @param {object} a\n * @param {object} b\n */\nexport const extend = ( a, b ) => {\n\n\tfor( let i in b ) {\n\t\ta[ i ] = b[ i ];\n\t}\n\n\treturn a;\n\n}\n\n/**\n * querySelectorAll but returns an Array.\n */\nexport const queryAll = ( el, selector ) => {\n\n\treturn Array.from( el.querySelectorAll( selector ) );\n\n}\n\n/**\n * classList.toggle() with cross browser support\n */\nexport const toggleClass = ( el, className, value ) => {\n\tif( value ) {\n\t\tel.classList.add( className );\n\t}\n\telse {\n\t\tel.classList.remove( className );\n\t}\n}\n\n/**\n * Utility for deserializing a value.\n *\n * @param {*} value\n * @return {*}\n */\nexport const deserialize = ( value ) => {\n\n\tif( typeof value === 'string' ) {\n\t\tif( value === 'null' ) return null;\n\t\telse if( value === 'true' ) return true;\n\t\telse if( value === 'false' ) return false;\n\t\telse if( value.match( /^-?[\\d\\.]+$/ ) ) return parseFloat( value );\n\t}\n\n\treturn value;\n\n}\n\n/**\n * Measures the distance in pixels between point a\n * and point b.\n *\n * @param {object} a point with x/y properties\n * @param {object} b point with x/y properties\n *\n * @return {number}\n */\nexport const distanceBetween = ( a, b ) => {\n\n\tlet dx = a.x - b.x,\n\t\tdy = a.y - b.y;\n\n\treturn Math.sqrt( dx*dx + dy*dy );\n\n}\n\n/**\n * Applies a CSS transform to the target element.\n *\n * @param {HTMLElement} element\n * @param {string} transform\n */\nexport const transformElement = ( element, transform ) => {\n\n\telement.style.transform = transform;\n\n}\n\n/**\n * Element.matches with IE support.\n *\n * @param {HTMLElement} target The element to match\n * @param {String} selector The CSS selector to match\n * the element against\n *\n * @return {Boolean}\n */\nexport const matches = ( target, selector ) => {\n\n\tlet matchesMethod = target.matches || target.matchesSelector || target.msMatchesSelector;\n\n\treturn !!( matchesMethod && matchesMethod.call( target, selector ) );\n\n}\n\n/**\n * Find the closest parent that matches the given\n * selector.\n *\n * @param {HTMLElement} target The child element\n * @param {String} selector The CSS selector to match\n * the parents against\n *\n * @return {HTMLElement} The matched parent or null\n * if no matching parent was found\n */\nexport const closest = ( target, selector ) => {\n\n\t// Native Element.closest\n\tif( typeof target.closest === 'function' ) {\n\t\treturn target.closest( selector );\n\t}\n\n\t// Polyfill\n\twhile( target ) {\n\t\tif( matches( target, selector ) ) {\n\t\t\treturn target;\n\t\t}\n\n\t\t// Keep searching\n\t\ttarget = target.parentNode;\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Handling the fullscreen functionality via the fullscreen API\n *\n * @see http://fullscreen.spec.whatwg.org/\n * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode\n */\nexport const enterFullscreen = element => {\n\n\telement = element || document.documentElement;\n\n\t// Check which implementation is available\n\tlet requestMethod = element.requestFullscreen ||\n\t\t\t\t\t\telement.webkitRequestFullscreen ||\n\t\t\t\t\t\telement.webkitRequestFullScreen ||\n\t\t\t\t\t\telement.mozRequestFullScreen ||\n\t\t\t\t\t\telement.msRequestFullscreen;\n\n\tif( requestMethod ) {\n\t\trequestMethod.apply( element );\n\t}\n\n}\n\n/**\n * Creates an HTML element and returns a reference to it.\n * If the element already exists the existing instance will\n * be returned.\n *\n * @param {HTMLElement} container\n * @param {string} tagname\n * @param {string} classname\n * @param {string} innerHTML\n *\n * @return {HTMLElement}\n */\nexport const createSingletonNode = ( container, tagname, classname, innerHTML='' ) => {\n\n\t// Find all nodes matching the description\n\tlet nodes = container.querySelectorAll( '.' + classname );\n\n\t// Check all matches to find one which is a direct child of\n\t// the specified container\n\tfor( let i = 0; i < nodes.length; i++ ) {\n\t\tlet testNode = nodes[i];\n\t\tif( testNode.parentNode === container ) {\n\t\t\treturn testNode;\n\t\t}\n\t}\n\n\t// If no node was found, create it now\n\tlet node = document.createElement( tagname );\n\tnode.className = classname;\n\tnode.innerHTML = innerHTML;\n\tcontainer.appendChild( node );\n\n\treturn node;\n\n}\n\n/**\n * Injects the given CSS styles into the DOM.\n *\n * @param {string} value\n */\nexport const createStyleSheet = ( value ) => {\n\n\tlet tag = document.createElement( 'style' );\n\ttag.type = 'text/css';\n\n\tif( value && value.length > 0 ) {\n\t\tif( tag.styleSheet ) {\n\t\t\ttag.styleSheet.cssText = value;\n\t\t}\n\t\telse {\n\t\t\ttag.appendChild( document.createTextNode( value ) );\n\t\t}\n\t}\n\n\tdocument.head.appendChild( tag );\n\n\treturn tag;\n\n}\n\n/**\n * Returns a key:value hash of all query params.\n */\nexport const getQueryHash = () => {\n\n\tlet query = {};\n\n\tlocation.search.replace( /[A-Z0-9]+?=([\\w\\.%-]*)/gi, a => {\n\t\tquery[ a.split( '=' ).shift() ] = a.split( '=' ).pop();\n\t} );\n\n\t// Basic deserialization\n\tfor( let i in query ) {\n\t\tlet value = query[ i ];\n\n\t\tquery[ i ] = deserialize( unescape( value ) );\n\t}\n\n\t// Do not accept new dependencies via query config to avoid\n\t// the potential of malicious script injection\n\tif( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];\n\n\treturn query;\n\n}\n\n/**\n * Returns the remaining height within the parent of the\n * target element.\n *\n * remaining height = [ configured parent height ] - [ current parent height ]\n *\n * @param {HTMLElement} element\n * @param {number} [height]\n */\nexport const getRemainingHeight = ( element, height = 0 ) => {\n\n\tif( element ) {\n\t\tlet newHeight, oldHeight = element.style.height;\n\n\t\t// Change the .stretch element height to 0 in order find the height of all\n\t\t// the other elements\n\t\telement.style.height = '0px';\n\n\t\t// In Overview mode, the parent (.slide) height is set of 700px.\n\t\t// Restore it temporarily to its natural height.\n\t\telement.parentNode.style.height = 'auto';\n\n\t\tnewHeight = height - element.parentNode.offsetHeight;\n\n\t\t// Restore the old height, just in case\n\t\telement.style.height = oldHeight + 'px';\n\n\t\t// Clear the parent (.slide) height. .removeProperty works in IE9+\n\t\telement.parentNode.style.removeProperty('height');\n\n\t\treturn newHeight;\n\t}\n\n\treturn height;\n\n}\n\nconst fileExtensionToMimeMap = {\n\t'mp4': 'video/mp4',\n\t'm4a': 'video/mp4',\n\t'ogv': 'video/ogg',\n\t'mpeg': 'video/mpeg',\n\t'webm': 'video/webm'\n}\n\n/**\n * Guess the MIME type for common file formats.\n */\nexport const getMimeTypeFromFile = ( filename='' ) => {\n\treturn fileExtensionToMimeMap[filename.split('.').pop()]\n}\n\n/**\n * Encodes a string for RFC3986-compliant URL format.\n * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI#encoding_for_rfc3986\n *\n * @param {string} url\n */\nexport const encodeRFC3986URI = ( url='' ) => {\n\treturn encodeURI(url)\n\t .replace(/%5B/g, \"[\")\n\t .replace(/%5D/g, \"]\")\n\t .replace(\n\t\t/[!'()*]/g,\n\t\t(c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`\n\t );\n}","const UA = navigator.userAgent;\n\nexport const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) ||\n\t\t\t\t\t\t( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS\n\nexport const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );\n\nexport const isAndroid = /android/gi.test( UA );","/**\n * fitty v2.3.7 - Snugly resizes text to fit its parent container\n * Copyright (c) 2023 Rik Schennink (https://pqina.nl/)\n */\n\nvar e=function(e){if(e){var t=function(e){return[].slice.call(e)},n=0,i=1,r=2,o=3,a=[],l=null,u=\"requestAnimationFrame\"in e?function(){e.cancelAnimationFrame(l),l=e.requestAnimationFrame((function(){return s(a.filter((function(e){return e.dirty&&e.active})))}))}:function(){},c=function(e){return function(){a.forEach((function(t){return t.dirty=e})),u()}},s=function(e){e.filter((function(e){return!e.styleComputed})).forEach((function(e){e.styleComputed=m(e)})),e.filter(y).forEach(v);var t=e.filter(p);t.forEach(d),t.forEach((function(e){v(e),f(e)})),t.forEach(S)},f=function(e){return e.dirty=n},d=function(e){e.availableWidth=e.element.parentNode.clientWidth,e.currentWidth=e.element.scrollWidth,e.previousFontSize=e.currentFontSize,e.currentFontSize=Math.min(Math.max(e.minSize,e.availableWidth/e.currentWidth*e.previousFontSize),e.maxSize),e.whiteSpace=e.multiLine&&e.currentFontSize===e.minSize?\"normal\":\"nowrap\"},p=function(e){return e.dirty!==r||e.dirty===r&&e.element.parentNode.clientWidth!==e.availableWidth},m=function(t){var n=e.getComputedStyle(t.element,null);return t.currentFontSize=parseFloat(n.getPropertyValue(\"font-size\")),t.display=n.getPropertyValue(\"display\"),t.whiteSpace=n.getPropertyValue(\"white-space\"),!0},y=function(e){var t=!1;return!e.preStyleTestCompleted&&(/inline-/.test(e.display)||(t=!0,e.display=\"inline-block\"),\"nowrap\"!==e.whiteSpace&&(t=!0,e.whiteSpace=\"nowrap\"),e.preStyleTestCompleted=!0,t)},v=function(e){e.element.style.whiteSpace=e.whiteSpace,e.element.style.display=e.display,e.element.style.fontSize=e.currentFontSize+\"px\"},S=function(e){e.element.dispatchEvent(new CustomEvent(\"fit\",{detail:{oldValue:e.previousFontSize,newValue:e.currentFontSize,scaleFactor:e.currentFontSize/e.previousFontSize}}))},h=function(e,t){return function(){e.dirty=t,e.active&&u()}},w=function(e){return function(){a=a.filter((function(t){return t.element!==e.element})),e.observeMutations&&e.observer.disconnect(),e.element.style.whiteSpace=e.originalStyle.whiteSpace,e.element.style.display=e.originalStyle.display,e.element.style.fontSize=e.originalStyle.fontSize}},b=function(e){return function(){e.active||(e.active=!0,u())}},z=function(e){return function(){return e.active=!1}},F=function(e){e.observeMutations&&(e.observer=new MutationObserver(h(e,i)),e.observer.observe(e.element,e.observeMutations))},g={minSize:16,maxSize:512,multiLine:!0,observeMutations:\"MutationObserver\"in e&&{subtree:!0,childList:!0,characterData:!0}},W=null,E=function(){e.clearTimeout(W),W=e.setTimeout(c(r),x.observeWindowDelay)},M=[\"resize\",\"orientationchange\"];return Object.defineProperty(x,\"observeWindow\",{set:function(t){var n=\"\".concat(t?\"add\":\"remove\",\"EventListener\");M.forEach((function(t){e[n](t,E)}))}}),x.observeWindow=!0,x.observeWindowDelay=100,x.fitAll=c(o),x}function C(e,t){var n=Object.assign({},g,t),i=e.map((function(e){var t=Object.assign({},n,{element:e,active:!0});return function(e){e.originalStyle={whiteSpace:e.element.style.whiteSpace,display:e.element.style.display,fontSize:e.element.style.fontSize},F(e),e.newbie=!0,e.dirty=!0,a.push(e)}(t),{element:e,fit:h(t,o),unfreeze:b(t),freeze:z(t),unsubscribe:w(t)}}));return u(),i}function x(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};return\"string\"==typeof e?C(t(document.querySelectorAll(e)),n):C([e],n)[0]}}(\"undefined\"==typeof window?null:window);export default e;\n","import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'\nimport { isMobile } from '../utils/device.js'\n\nimport fitty from 'fitty';\n\n/**\n * Handles loading, unloading and playback of slide\n * content such as images, videos and iframes.\n */\nexport default class SlideContent {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );\n\t\tthis.ensureMobileMediaPlaying = this.ensureMobileMediaPlaying.bind( this );\n\n\t}\n\n\t/**\n\t * Should the given element be preloaded?\n\t * Decides based on local element attributes and global config.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tshouldPreload( element ) {\n\n\t\tif( this.Reveal.isScrollView() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Prefer an explicit global preload setting\n\t\tlet preload = this.Reveal.getConfig().preloadIframes;\n\n\t\t// If no global setting is available, fall back on the element's\n\t\t// own preload setting\n\t\tif( typeof preload !== 'boolean' ) {\n\t\t\tpreload = element.hasAttribute( 'data-preload' );\n\t\t}\n\n\t\treturn preload;\n\t}\n\n\t/**\n\t * Called when the given slide is within the configured view\n\t * distance. Shows the slide element and loads any content\n\t * that is set to load lazily (data-src).\n\t *\n\t * @param {HTMLElement} slide Slide to show\n\t */\n\tload( slide, options = {} ) {\n\n\t\t// Show the slide element\n\t\tslide.style.display = this.Reveal.getConfig().display;\n\n\t\t// Media elements with data-src attributes\n\t\tqueryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {\n\t\t\tif( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {\n\t\t\t\telement.setAttribute( 'src', element.getAttribute( 'data-src' ) );\n\t\t\t\telement.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\telement.removeAttribute( 'data-src' );\n\t\t\t}\n\t\t} );\n\n\t\t// Media elements with children\n\t\tqueryAll( slide, 'video, audio' ).forEach( media => {\n\t\t\tlet sources = 0;\n\n\t\t\tqueryAll( media, 'source[data-src]' ).forEach( source => {\n\t\t\t\tsource.setAttribute( 'src', source.getAttribute( 'data-src' ) );\n\t\t\t\tsource.removeAttribute( 'data-src' );\n\t\t\t\tsource.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\tsources += 1;\n\t\t\t} );\n\n\t\t\t// Enable inline video playback in mobile Safari\n\t\t\tif( isMobile && media.tagName === 'VIDEO' ) {\n\t\t\t\tmedia.setAttribute( 'playsinline', '' );\n\t\t\t}\n\n\t\t\t// If we rewrote sources for this video/audio element, we need\n\t\t\t// to manually tell it to load from its new origin\n\t\t\tif( sources > 0 ) {\n\t\t\t\tmedia.load();\n\t\t\t}\n\t\t} );\n\n\n\t\t// Show the corresponding background element\n\t\tlet background = slide.slideBackgroundElement;\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'block';\n\n\t\t\tlet backgroundContent = slide.slideBackgroundContentElement;\n\t\t\tlet backgroundIframe = slide.getAttribute( 'data-background-iframe' );\n\n\t\t\t// If the background contains media, load it\n\t\t\tif( background.hasAttribute( 'data-loaded' ) === false ) {\n\t\t\t\tbackground.setAttribute( 'data-loaded', 'true' );\n\n\t\t\t\tlet backgroundImage = slide.getAttribute( 'data-background-image' ),\n\t\t\t\t\tbackgroundVideo = slide.getAttribute( 'data-background-video' ),\n\t\t\t\t\tbackgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),\n\t\t\t\t\tbackgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );\n\n\t\t\t\t// Images\n\t\t\t\tif( backgroundImage ) {\n\t\t\t\t\t// base64\n\t\t\t\t\tif( /^data:/.test( backgroundImage.trim() ) ) {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`;\n\t\t\t\t\t}\n\t\t\t\t\t// URL(s)\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {\n\t\t\t\t\t\t\t// Decode URL(s) that are already encoded first\n\t\t\t\t\t\t\tlet decoded = decodeURI(background.trim());\n\t\t\t\t\t\t\treturn `url(${encodeRFC3986URI(decoded)})`;\n\t\t\t\t\t\t}).join( ',' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Videos\n\t\t\t\telse if ( backgroundVideo ) {\n\t\t\t\t\tlet video = document.createElement( 'video' );\n\n\t\t\t\t\tif( backgroundVideoLoop ) {\n\t\t\t\t\t\tvideo.setAttribute( 'loop', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\tif( backgroundVideoMuted || this.Reveal.isSpeakerNotes() ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Enable inline playback in mobile Safari\n\t\t\t\t\t//\n\t\t\t\t\t// Mute is required for video to play when using\n\t\t\t\t\t// swipe gestures to navigate since they don't\n\t\t\t\t\t// count as direct user actions :'(\n\t\t\t\t\tif( isMobile ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t\tvideo.setAttribute( 'playsinline', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Support comma separated lists of video sources\n\t\t\t\t\tbackgroundVideo.split( ',' ).forEach( source => {\n\t\t\t\t\t\tconst sourceElement = document.createElement( 'source' );\n\t\t\t\t\t\tsourceElement.setAttribute( 'src', source );\n\n\t\t\t\t\t\tlet type = getMimeTypeFromFile( source );\n\t\t\t\t\t\tif( type ) {\n\t\t\t\t\t\t\tsourceElement.setAttribute( 'type', type );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tvideo.appendChild( sourceElement );\n\t\t\t\t\t} );\n\n\t\t\t\t\tbackgroundContent.appendChild( video );\n\t\t\t\t}\n\t\t\t\t// Iframes\n\t\t\t\telse if( backgroundIframe && options.excludeIframes !== true ) {\n\t\t\t\t\tlet iframe = document.createElement( 'iframe' );\n\t\t\t\t\tiframe.setAttribute( 'allowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'mozallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'webkitallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'allow', 'autoplay' );\n\n\t\t\t\t\tiframe.setAttribute( 'data-src', backgroundIframe );\n\n\t\t\t\t\tiframe.style.width = '100%';\n\t\t\t\t\tiframe.style.height = '100%';\n\t\t\t\t\tiframe.style.maxHeight = '100%';\n\t\t\t\t\tiframe.style.maxWidth = '100%';\n\n\t\t\t\t\tbackgroundContent.appendChild( iframe );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Start loading preloadable iframes\n\t\t\tlet backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );\n\t\t\tif( backgroundIframeElement ) {\n\n\t\t\t\t// Check if this iframe is eligible to be preloaded\n\t\t\t\tif( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {\n\t\t\t\t\tif( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {\n\t\t\t\t\t\tbackgroundIframeElement.setAttribute( 'src', backgroundIframe );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.layout( slide );\n\n\t}\n\n\t/**\n\t * Applies JS-dependent layout helpers for the scope.\n\t */\n\tlayout( scopeElement ) {\n\n\t\t// Autosize text with the r-fit-text class based on the\n\t\t// size of its container. This needs to happen after the\n\t\t// slide is visible in order to measure the text.\n\t\tArray.from( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => {\n\t\t\tfitty( element, {\n\t\t\t\tminSize: 24,\n\t\t\t\tmaxSize: this.Reveal.getConfig().height * 0.8,\n\t\t\t\tobserveMutations: false,\n\t\t\t\tobserveWindow: false\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Unloads and hides the given slide. This is called when the\n\t * slide is moved outside of the configured view distance.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tunload( slide ) {\n\n\t\t// Hide the slide element\n\t\tslide.style.display = 'none';\n\n\t\t// Hide the corresponding background element\n\t\tlet background = this.Reveal.getSlideBackground( slide );\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'none';\n\n\t\t\t// Unload any background iframes\n\t\t\tqueryAll( background, 'iframe[src]' ).forEach( element => {\n\t\t\t\telement.removeAttribute( 'src' );\n\t\t\t} );\n\t\t}\n\n\t\t// Reset lazy-loaded media elements with src attributes\n\t\tqueryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => {\n\t\t\telement.setAttribute( 'data-src', element.getAttribute( 'src' ) );\n\t\t\telement.removeAttribute( 'src' );\n\t\t} );\n\n\t\t// Reset lazy-loaded media elements with children\n\t\tqueryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => {\n\t\t\tsource.setAttribute( 'data-src', source.getAttribute( 'src' ) );\n\t\t\tsource.removeAttribute( 'src' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Enforces origin-specific format rules for embedded media.\n\t */\n\tformatEmbeddedContent() {\n\n\t\tlet _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {\n\t\t\tqueryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*=\"'+ sourceURL +'\"]' ).forEach( el => {\n\t\t\t\tlet src = el.getAttribute( sourceAttribute );\n\t\t\t\tif( src && src.indexOf( param ) === -1 ) {\n\t\t\t\t\tel.setAttribute( sourceAttribute, src + ( !/\\?/.test( src ) ? '?' : '&' ) + param );\n\t\t\t\t}\n\t\t\t});\n\t\t};\n\n\t\t// YouTube frames must include \"?enablejsapi=1\"\n\t\t_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );\n\n\t\t// Vimeo frames must include \"?api=1\"\n\t\t_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );\n\n\t}\n\n\t/**\n\t * Start playback of any embedded content inside of\n\t * the given element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstartEmbeddedContent( element ) {\n\n\t\tif( element ) {\n\n\t\t\tconst isSpeakerNotesWindow = this.Reveal.isSpeakerNotes();\n\n\t\t\t// Restart GIFs\n\t\t\tqueryAll( element, 'img[src$=\".gif\"]' ).forEach( el => {\n\t\t\t\t// Setting the same unchanged source like this was confirmed\n\t\t\t\t// to work in Chrome, FF & Safari\n\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'src' ) );\n\t\t\t} );\n\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\tif( autoplay && typeof el.play === 'function' ) {\n\n\t\t\t\t\t// In the speaker view we only auto-play muted media\n\t\t\t\t\tif( isSpeakerNotesWindow && !el.muted ) return;\n\n\t\t\t\t\t// If the media is ready, start playback\n\t\t\t\t\tif( el.readyState > 1 ) {\n\t\t\t\t\t\tthis.startEmbeddedMedia( { target: el } );\n\t\t\t\t\t}\n\t\t\t\t\t// Mobile devices never fire a loaded event so instead\n\t\t\t\t\t// of waiting, we initiate playback\n\t\t\t\t\telse if( isMobile ) {\n\t\t\t\t\t\tlet promise = el.play();\n\n\t\t\t\t\t\tel.addEventListener( 'canplay', this.ensureMobileMediaPlaying );\n\n\t\t\t\t\t\t// If autoplay does not work, ensure that the controls are visible so\n\t\t\t\t\t\t// that the viewer can start the media on their own\n\t\t\t\t\t\tif( promise && typeof promise.catch === 'function' && el.controls === false ) {\n\t\t\t\t\t\t\tpromise.catch( () => {\n\t\t\t\t\t\t\t\tel.controls = true;\n\n\t\t\t\t\t\t\t\t// Once the video does start playing, hide the controls again\n\t\t\t\t\t\t\t\tel.addEventListener( 'play', () => {\n\t\t\t\t\t\t\t\t\tel.controls = false;\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// If the media isn't loaded, wait before playing\n\t\t\t\t\telse {\n\t\t\t\t\t\tel.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes\n\t\t\t\t\t\tel.addEventListener( 'loadeddata', this.startEmbeddedMedia );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Don't play iframe content in the speaker view since we can't\n\t\t\t// guarantee that it's muted\n\t\t\tif( !isSpeakerNotesWindow ) {\n\n\t\t\t\t// Normal iframes\n\t\t\t\tqueryAll( element, 'iframe[src]' ).forEach( el => {\n\t\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\t\treturn;\n\t\t\t\t\t}\n\n\t\t\t\t\tthis.startEmbeddedIframe( { target: el } );\n\t\t\t\t} );\n\n\t\t\t\t// Lazy loading iframes\n\t\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\t\treturn;\n\t\t\t\t\t}\n\n\t\t\t\t\tif( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {\n\t\t\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes\n\t\t\t\t\t\tel.addEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'data-src' ) );\n\t\t\t\t\t}\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Ensure that an HTMLMediaElement is playing on mobile devices.\n\t *\n\t * This is a workaround for a bug in mobile Safari where\n\t * the media fails to display if many videos are started\n\t * at the same moment. When this happens, Mobile Safari\n\t * reports the video is playing, and the current time\n\t * advances, but nothing is visible.\n\t *\n\t * @param {Event} event\n\t */\n\tensureMobileMediaPlaying( event ) {\n\n\t\tconst el = event.target;\n\n\t\t// Ignore this check incompatible browsers\n\t\tif( typeof el.getVideoPlaybackQuality !== 'function' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tsetTimeout( () => {\n\n\t\t\tconst playing = el.paused === false;\n\t\t\tconst totalFrames = el.getVideoPlaybackQuality().totalVideoFrames;\n\n\t\t\tif( playing && totalFrames === 0 ) {\n\t\t\t\tel.load();\n\t\t\t\tel.play();\n\t\t\t}\n\n\t\t}, 1000 );\n\n\t}\n\n\t/**\n\t * Starts playing an embedded video/audio element after\n\t * it has finished loading.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedMedia( event ) {\n\n\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\tif( isAttachedToDOM && isVisible ) {\n\t\t\t// Don't restart if media is already playing\n\t\t\tif( event.target.paused || event.target.ended ) {\n\t\t\t\tevent.target.currentTime = 0;\n\t\t\t\tevent.target.play();\n\t\t\t}\n\t\t}\n\n\t\tevent.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );\n\n\t}\n\n\t/**\n\t * \"Starts\" the content of an embedded iframe using the\n\t * postMessage API.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedIframe( event ) {\n\n\t\tlet iframe = event.target;\n\n\t\tif( iframe && iframe.contentWindow ) {\n\n\t\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\t\tif( isAttachedToDOM && isVisible ) {\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\t// YouTube postMessage API\n\t\t\t\tif( /youtube\\.com\\/embed\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"playVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Vimeo postMessage API\n\t\t\t\telse if( /player\\.vimeo\\.com\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"method\":\"play\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Generic postMessage API\n\t\t\t\telse {\n\t\t\t\t\tiframe.contentWindow.postMessage( 'slide:start', '*' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Stop playback of any embedded content inside of\n\t * the targeted slide.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstopEmbeddedContent( element, options = {} ) {\n\n\t\toptions = extend( {\n\t\t\t// Defaults\n\t\t\tunloadIframes: true\n\t\t}, options );\n\n\t\tif( element && element.parentNode ) {\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {\n\t\t\t\t\tel.setAttribute('data-paused-by-reveal', '');\n\t\t\t\t\tel.pause();\n\n\t\t\t\t\tif( isMobile ) {\n\t\t\t\t\t\tel.removeEventListener( 'canplay', this.ensureMobileMediaPlaying );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Generic postMessage API for non-lazy loaded iframes\n\t\t\tqueryAll( element, 'iframe' ).forEach( el => {\n\t\t\t\tif( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );\n\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t});\n\n\t\t\t// YouTube postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"youtube.com/embed/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"pauseVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\t// Vimeo postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"player.vimeo.com/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"method\":\"pause\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\tif( options.unloadIframes === true ) {\n\t\t\t\t// Unload lazy-loaded iframes\n\t\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\t\t// Only removing the src doesn't actually unload the frame\n\t\t\t\t\t// in all browsers (Firefox) so we set it to blank first\n\t\t\t\t\tel.setAttribute( 'src', 'about:blank' );\n\t\t\t\t\tel.removeAttribute( 'src' );\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t}\n\n}\n","\nexport const SLIDES_SELECTOR = '.slides section';\nexport const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';\nexport const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';\nexport const HORIZONTAL_BACKGROUNDS_SELECTOR = '.backgrounds>.slide-background';\n\n// Methods that may not be invoked via the postMessage API\nexport const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/;\n\n// Regex for retrieving the fragment style from a class attribute\nexport const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;\n\n// Slide number formats\nexport const SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL = 'h.v';\nexport const SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL = 'h/v';\nexport const SLIDE_NUMBER_FORMAT_CURRENT = 'c';\nexport const SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL = 'c/t';","import {\n\tSLIDE_NUMBER_FORMAT_CURRENT,\n\tSLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL,\n\tSLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL,\n\tSLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL\n} from \"../utils/constants\";\n\n/**\n * Handles the display of reveal.js' optional slide number.\n */\nexport default class SlideNumber {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'slide-number';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tlet slideNumberDisplay = 'none';\n\t\tif( config.slideNumber && !this.Reveal.isPrintView() ) {\n\t\t\tif( config.showSlideNumber === 'all' ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t\telse if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t}\n\n\t\tthis.element.style.display = slideNumberDisplay;\n\n\t}\n\n\t/**\n\t * Updates the slide number to match the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update slide number if enabled\n\t\tif( this.Reveal.getConfig().slideNumber && this.element ) {\n\t\t\tthis.element.innerHTML = this.getSlideNumber();\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns the HTML string corresponding to the current slide\n\t * number, including formatting.\n\t */\n\tgetSlideNumber( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet value;\n\t\tlet format = SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL;\n\n\t\tif ( typeof config.slideNumber === 'function' ) {\n\t\t\tvalue = config.slideNumber( slide );\n\t\t} else {\n\t\t\t// Check if a custom number format is available\n\t\t\tif( typeof config.slideNumber === 'string' ) {\n\t\t\t\tformat = config.slideNumber;\n\t\t\t}\n\n\t\t\t// If there are ONLY vertical slides in this deck, always use\n\t\t\t// a flattened slide number\n\t\t\tif( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {\n\t\t\t\tformat = SLIDE_NUMBER_FORMAT_CURRENT;\n\t\t\t}\n\n\t\t\t// Offset the current slide number by 1 to make it 1-indexed\n\t\t\tlet horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1;\n\n\t\t\tvalue = [];\n\t\t\tswitch( format ) {\n\t\t\t\tcase SLIDE_NUMBER_FORMAT_CURRENT:\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );\n\t\t\t\t\tbreak;\n\t\t\t\tcase SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL:\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );\n\t\t\t\t\tbreak;\n\t\t\t\tdefault:\n\t\t\t\t\tlet indices = this.Reveal.getIndices( slide );\n\t\t\t\t\tvalue.push( indices.h + horizontalOffset );\n\t\t\t\t\tlet sep = format === SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL ? '/' : '.';\n\t\t\t\t\tif( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );\n\t\t\t}\n\t\t}\n\n\t\tlet url = '#' + this.Reveal.location.getHash( slide );\n\t\treturn this.formatNumber( value[0], value[1], value[2], url );\n\n\t}\n\n\t/**\n\t * Applies HTML formatting to a slide number before it's\n\t * written to the DOM.\n\t *\n\t * @param {number} a Current slide\n\t * @param {string} delimiter Character to separate slide numbers\n\t * @param {(number|*)} b Total slides\n\t * @param {HTMLElement} [url='#'+locationHash()] The url to link to\n\t * @return {string} HTML string fragment\n\t */\n\tformatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) {\n\n\t\tif( typeof b === 'number' && !isNaN( b ) ) {\n\t\t\treturn `\n\t\t\t\t\t${a} \n\t\t\t\t\t${delimiter} \n\t\t\t\t\t${b} \n\t\t\t\t\t `;\n\t\t}\n\t\telse {\n\t\t\treturn `\n\t\t\t\t\t${a} \n\t\t\t\t\t `;\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","import {\n\tSLIDE_NUMBER_FORMAT_CURRENT,\n\tSLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL\n} from \"../utils/constants\";\n\n/**\n * Makes it possible to jump to a slide by entering its\n * slide number or id.\n */\nexport default class JumpToSlide {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onInput = this.onInput.bind( this );\n\t\tthis.onBlur = this.onBlur.bind( this );\n\t\tthis.onKeyDown = this.onKeyDown.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'jump-to-slide';\n\n this.jumpInput = document.createElement( 'input' );\n this.jumpInput.type = 'text';\n this.jumpInput.className = 'jump-to-slide-input';\n this.jumpInput.placeholder = 'Jump to slide';\n\t\tthis.jumpInput.addEventListener( 'input', this.onInput );\n\t\tthis.jumpInput.addEventListener( 'keydown', this.onKeyDown );\n\t\tthis.jumpInput.addEventListener( 'blur', this.onBlur );\n\n this.element.appendChild( this.jumpInput );\n\n\t}\n\n\tshow() {\n\n\t\tthis.indicesOnShow = this.Reveal.getIndices();\n\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\t\tthis.jumpInput.focus();\n\n\t}\n\n\thide() {\n\n\t\tif( this.isVisible() ) {\n\t\t\tthis.element.remove();\n\t\t\tthis.jumpInput.value = '';\n\n\t\t\tclearTimeout( this.jumpTimeout );\n\t\t\tdelete this.jumpTimeout;\n\t\t}\n\n\t}\n\n\tisVisible() {\n\n\t\treturn !!this.element.parentNode;\n\n\t}\n\n\t/**\n\t * Parses the current input and jumps to the given slide.\n\t */\n\tjump() {\n\n\t\tclearTimeout( this.jumpTimeout );\n\t\tdelete this.jumpTimeout;\n\n\t\tlet query = this.jumpInput.value.trim( '' );\n\t\tlet indices;\n\n\t\t// When slide numbers are formatted to be a single linear number\n\t\t// (instead of showing a separate horizontal/vertical index) we\n\t\t// use the same format for slide jumps\n\t\tif( /^\\d+$/.test( query ) ) {\n\t\t\tconst slideNumberFormat = this.Reveal.getConfig().slideNumber;\n\t\t\tif( slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT || slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL ) {\n\t\t\t\tconst slide = this.Reveal.getSlides()[ parseInt( query, 10 ) - 1 ];\n\t\t\t\tif( slide ) {\n\t\t\t\t\tindices = this.Reveal.getIndices( slide );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( !indices ) {\n\t\t\t// If the query uses \"horizontal.vertical\" format, convert to\n\t\t\t// \"horizontal/vertical\" so that our URL parser can understand\n\t\t\tif( /^\\d+\\.\\d+$/.test( query ) ) {\n\t\t\t\tquery = query.replace( '.', '/' );\n\t\t\t}\n\n\t\t\tindices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } );\n\t\t}\n\n\t\t// Still no valid index? Fall back on a text search\n\t\tif( !indices && /\\S+/i.test( query ) && query.length > 1 ) {\n\t\t\tindices = this.search( query );\n\t\t}\n\n\t\tif( indices && query !== '' ) {\n\t\t\tthis.Reveal.slide( indices.h, indices.v, indices.f );\n\t\t\treturn true;\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );\n\t\t\treturn false;\n\t\t}\n\n\t}\n\n\tjumpAfter( delay ) {\n\n\t\tclearTimeout( this.jumpTimeout );\n\t\tthis.jumpTimeout = setTimeout( () => this.jump(), delay );\n\n\t}\n\n\t/**\n\t * A lofi search that looks for the given query in all\n\t * of our slides and returns the first match.\n\t */\n\tsearch( query ) {\n\n\t\tconst regex = new RegExp( '\\\\b' + query.trim() + '\\\\b', 'i' );\n\n\t\tconst slide = this.Reveal.getSlides().find( ( slide ) => {\n\t\t\treturn regex.test( slide.innerText );\n\t\t} );\n\n\t\tif( slide ) {\n\t\t\treturn this.Reveal.getIndices( slide );\n\t\t}\n\t\telse {\n\t\t\treturn null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Reverts back to the slide we were on when jump to slide was\n\t * invoked.\n\t */\n\tcancel() {\n\n\t\tthis.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );\n\t\tthis.hide();\n\n\t}\n\n\tconfirm() {\n\n\t\tthis.jump();\n\t\tthis.hide();\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.jumpInput.removeEventListener( 'input', this.onInput );\n\t\tthis.jumpInput.removeEventListener( 'keydown', this.onKeyDown );\n\t\tthis.jumpInput.removeEventListener( 'blur', this.onBlur );\n\n\t\tthis.element.remove();\n\n\t}\n\n\tonKeyDown( event ) {\n\n\t\tif( event.keyCode === 13 ) {\n\t\t\tthis.confirm();\n\t\t}\n\t\telse if( event.keyCode === 27 ) {\n\t\t\tthis.cancel();\n\n\t\t\tevent.stopImmediatePropagation();\n\t\t}\n\n\t}\n\n\tonInput( event ) {\n\n\t\tthis.jumpAfter( 200 );\n\n\t}\n\n\tonBlur() {\n\n\t\tsetTimeout( () => this.hide(), 1 );\n\n\t}\n\n}","/**\n * Converts various color input formats to an {r:0,g:0,b:0} object.\n *\n * @param {string} color The string representation of a color\n * @example\n * colorToRgb('#000');\n * @example\n * colorToRgb('#000000');\n * @example\n * colorToRgb('rgb(0,0,0)');\n * @example\n * colorToRgb('rgba(0,0,0)');\n *\n * @return {{r: number, g: number, b: number, [a]: number}|null}\n */\nexport const colorToRgb = ( color ) => {\n\n\tlet hex3 = color.match( /^#([0-9a-f]{3})$/i );\n\tif( hex3 && hex3[1] ) {\n\t\thex3 = hex3[1];\n\t\treturn {\n\t\t\tr: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,\n\t\t\tg: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,\n\t\t\tb: parseInt( hex3.charAt( 2 ), 16 ) * 0x11\n\t\t};\n\t}\n\n\tlet hex6 = color.match( /^#([0-9a-f]{6})$/i );\n\tif( hex6 && hex6[1] ) {\n\t\thex6 = hex6[1];\n\t\treturn {\n\t\t\tr: parseInt( hex6.slice( 0, 2 ), 16 ),\n\t\t\tg: parseInt( hex6.slice( 2, 4 ), 16 ),\n\t\t\tb: parseInt( hex6.slice( 4, 6 ), 16 )\n\t\t};\n\t}\n\n\tlet rgb = color.match( /^rgb\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\)$/i );\n\tif( rgb ) {\n\t\treturn {\n\t\t\tr: parseInt( rgb[1], 10 ),\n\t\t\tg: parseInt( rgb[2], 10 ),\n\t\t\tb: parseInt( rgb[3], 10 )\n\t\t};\n\t}\n\n\tlet rgba = color.match( /^rgba\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*([\\d]+|[\\d]*.[\\d]+)\\s*\\)$/i );\n\tif( rgba ) {\n\t\treturn {\n\t\t\tr: parseInt( rgba[1], 10 ),\n\t\t\tg: parseInt( rgba[2], 10 ),\n\t\t\tb: parseInt( rgba[3], 10 ),\n\t\t\ta: parseFloat( rgba[4] )\n\t\t};\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Calculates brightness on a scale of 0-255.\n *\n * @param {string} color See colorToRgb for supported formats.\n * @see {@link colorToRgb}\n */\nexport const colorBrightness = ( color ) => {\n\n\tif( typeof color === 'string' ) color = colorToRgb( color );\n\n\tif( color ) {\n\t\treturn ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000;\n\t}\n\n\treturn null;\n\n}","import { queryAll } from '../utils/util.js'\nimport { colorToRgb, colorBrightness } from '../utils/color.js'\n\n/**\n * Creates and updates slide backgrounds.\n */\nexport default class Backgrounds {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'backgrounds';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Creates the slide background elements and appends them\n\t * to the background container. One element is created per\n\t * slide no matter if the given slide has visible background.\n\t */\n\tcreate() {\n\n\t\t// Clear prior backgrounds\n\t\tthis.element.innerHTML = '';\n\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t// Iterate over all horizontal slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( slideh => {\n\n\t\t\tlet backgroundStack = this.createBackground( slideh, this.element );\n\n\t\t\t// Iterate over all vertical slides\n\t\t\tqueryAll( slideh, 'section' ).forEach( slidev => {\n\n\t\t\t\tthis.createBackground( slidev, backgroundStack );\n\n\t\t\t\tbackgroundStack.classList.add( 'stack' );\n\n\t\t\t} );\n\n\t\t} );\n\n\t\t// Add parallax background if specified\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tthis.element.style.backgroundImage = 'url(\"' + this.Reveal.getConfig().parallaxBackgroundImage + '\")';\n\t\t\tthis.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;\n\t\t\tthis.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;\n\t\t\tthis.element.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;\n\n\t\t\t// Make sure the below properties are set on the element - these properties are\n\t\t\t// needed for proper transitions to be set on the element via CSS. To remove\n\t\t\t// annoying background slide-in effect when the presentation starts, apply\n\t\t\t// these properties after short time delay\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.add( 'has-parallax-background' );\n\t\t\t}, 1 );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.element.style.backgroundImage = '';\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a background for the given slide.\n\t *\n\t * @param {HTMLElement} slide\n\t * @param {HTMLElement} container The element that the background\n\t * should be appended to\n\t * @return {HTMLElement} New background div\n\t */\n\tcreateBackground( slide, container ) {\n\n\t\t// Main slide background element\n\t\tlet element = document.createElement( 'div' );\n\t\telement.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );\n\n\t\t// Inner background element that wraps images/videos/iframes\n\t\tlet contentElement = document.createElement( 'div' );\n\t\tcontentElement.className = 'slide-background-content';\n\n\t\telement.appendChild( contentElement );\n\t\tcontainer.appendChild( element );\n\n\t\tslide.slideBackgroundElement = element;\n\t\tslide.slideBackgroundContentElement = contentElement;\n\n\t\t// Syncs the background to reflect all current background settings\n\t\tthis.sync( slide );\n\n\t\treturn element;\n\n\t}\n\n\t/**\n\t * Renders all of the visual properties of a slide background\n\t * based on the various background attributes.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tsync( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement,\n\t\t\tcontentElement = slide.slideBackgroundContentElement;\n\n\t\tconst data = {\n\t\t\tbackground: slide.getAttribute( 'data-background' ),\n\t\t\tbackgroundSize: slide.getAttribute( 'data-background-size' ),\n\t\t\tbackgroundImage: slide.getAttribute( 'data-background-image' ),\n\t\t\tbackgroundVideo: slide.getAttribute( 'data-background-video' ),\n\t\t\tbackgroundIframe: slide.getAttribute( 'data-background-iframe' ),\n\t\t\tbackgroundColor: slide.getAttribute( 'data-background-color' ),\n\t\t\tbackgroundGradient: slide.getAttribute( 'data-background-gradient' ),\n\t\t\tbackgroundRepeat: slide.getAttribute( 'data-background-repeat' ),\n\t\t\tbackgroundPosition: slide.getAttribute( 'data-background-position' ),\n\t\t\tbackgroundTransition: slide.getAttribute( 'data-background-transition' ),\n\t\t\tbackgroundOpacity: slide.getAttribute( 'data-background-opacity' ),\n\t\t};\n\n\t\tconst dataPreload = slide.hasAttribute( 'data-preload' );\n\n\t\t// Reset the prior background state in case this is not the\n\t\t// initial sync\n\t\tslide.classList.remove( 'has-dark-background' );\n\t\tslide.classList.remove( 'has-light-background' );\n\n\t\telement.removeAttribute( 'data-loaded' );\n\t\telement.removeAttribute( 'data-background-hash' );\n\t\telement.removeAttribute( 'data-background-size' );\n\t\telement.removeAttribute( 'data-background-transition' );\n\t\telement.style.backgroundColor = '';\n\n\t\tcontentElement.style.backgroundSize = '';\n\t\tcontentElement.style.backgroundRepeat = '';\n\t\tcontentElement.style.backgroundPosition = '';\n\t\tcontentElement.style.backgroundImage = '';\n\t\tcontentElement.style.opacity = '';\n\t\tcontentElement.innerHTML = '';\n\n\t\tif( data.background ) {\n\t\t\t// Auto-wrap image urls in url(...)\n\t\t\tif( /^(http|file|\\/\\/)/gi.test( data.background ) || /\\.(svg|png|jpg|jpeg|gif|bmp|webp)([?#\\s]|$)/gi.test( data.background ) ) {\n\t\t\t\tslide.setAttribute( 'data-background-image', data.background );\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.background = data.background;\n\t\t\t}\n\t\t}\n\n\t\t// Create a hash for this combination of background settings.\n\t\t// This is used to determine when two slide backgrounds are\n\t\t// the same.\n\t\tif( data.background || data.backgroundColor || data.backgroundGradient || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {\n\t\t\telement.setAttribute( 'data-background-hash', data.background +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundSize +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundImage +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundVideo +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundIframe +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundColor +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundGradient +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundRepeat +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundPosition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundTransition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundOpacity );\n\t\t}\n\n\t\t// Additional and optional background properties\n\t\tif( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );\n\t\tif( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;\n\t\tif( data.backgroundGradient ) element.style.backgroundImage = data.backgroundGradient;\n\t\tif( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );\n\n\t\tif( dataPreload ) element.setAttribute( 'data-preload', '' );\n\n\t\t// Background image options are set on the content wrapper\n\t\tif( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;\n\t\tif( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;\n\t\tif( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;\n\t\tif( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;\n\n\t\tconst contrastClass = this.getContrastClass( slide );\n\n\t\tif( typeof contrastClass === 'string' ) {\n\t\t\tslide.classList.add( contrastClass );\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns a class name that can be applied to a slide to indicate\n\t * if it has a light or dark background.\n\t *\n\t * @param {*} slide\n\t *\n\t * @returns {string|null}\n\t */\n\tgetContrastClass( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement;\n\n\t\t// If this slide has a background color, we add a class that\n\t\t// signals if it is light or dark. If the slide has no background\n\t\t// color, no class will be added\n\t\tlet contrastColor = slide.getAttribute( 'data-background-color' );\n\n\t\t// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background\n\t\tif( !contrastColor || !colorToRgb( contrastColor ) ) {\n\t\t\tlet computedBackgroundStyle = window.getComputedStyle( element );\n\t\t\tif( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {\n\t\t\t\tcontrastColor = computedBackgroundStyle.backgroundColor;\n\t\t\t}\n\t\t}\n\n\t\tif( contrastColor ) {\n\t\t\tconst rgb = colorToRgb( contrastColor );\n\n\t\t\t// Ignore fully transparent backgrounds. Some browsers return\n\t\t\t// rgba(0,0,0,0) when reading the computed background color of\n\t\t\t// an element with no background\n\t\t\tif( rgb && rgb.a !== 0 ) {\n\t\t\t\tif( colorBrightness( contrastColor ) < 128 ) {\n\t\t\t\t\treturn 'has-dark-background';\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\treturn 'has-light-background';\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n\t/**\n\t * Bubble the 'has-light-background'/'has-dark-background' classes.\n\t */\n\tbubbleSlideContrastClassToElement( slide, target ) {\n\n\t\t[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {\n\t\t\tif( slide.classList.contains( classToBubble ) ) {\n\t\t\t\ttarget.classList.add( classToBubble );\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttarget.classList.remove( classToBubble );\n\t\t\t}\n\t\t}, this );\n\n\t}\n\n\t/**\n\t * Updates the background elements to reflect the current\n\t * slide.\n\t *\n\t * @param {boolean} includeAll If true, the backgrounds of\n\t * all vertical slides (not just the present) will be updated.\n\t */\n\tupdate( includeAll = false ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tlet currentBackground = null;\n\n\t\t// Reverse past/future classes when in RTL mode\n\t\tlet horizontalPast = config.rtl ? 'future' : 'past',\n\t\t\thorizontalFuture = config.rtl ? 'past' : 'future';\n\n\t\t// Update the classes of all backgrounds to match the\n\t\t// states of their slides (past/present/future)\n\t\tArray.from( this.element.childNodes ).forEach( ( backgroundh, h ) => {\n\n\t\t\tbackgroundh.classList.remove( 'past', 'present', 'future' );\n\n\t\t\tif( h < indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalPast );\n\t\t\t}\n\t\t\telse if ( h > indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalFuture );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundh.classList.add( 'present' );\n\n\t\t\t\t// Store a reference to the current background element\n\t\t\t\tcurrentBackground = backgroundh;\n\t\t\t}\n\n\t\t\tif( includeAll || h === indices.h ) {\n\t\t\t\tqueryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => {\n\n\t\t\t\t\tbackgroundv.classList.remove( 'past', 'present', 'future' );\n\n\t\t\t\t\tconst indexv = typeof indices.v === 'number' ? indices.v : 0;\n\n\t\t\t\t\tif( v < indexv ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'past' );\n\t\t\t\t\t}\n\t\t\t\t\telse if ( v > indexv ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'future' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundv.classList.add( 'present' );\n\n\t\t\t\t\t\t// Only if this is the present horizontal and vertical slide\n\t\t\t\t\t\tif( h === indices.h ) currentBackground = backgroundv;\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\t\t\t}\n\n\t\t} );\n\n\t\t// The previous background may refer to a DOM element that has\n\t\t// been removed after a presentation is synced & bgs are recreated\n\t\tif( this.previousBackground && !this.previousBackground.closest( 'body' ) ) {\n\t\t\tthis.previousBackground = null;\n\t\t}\n\n\t\tif( currentBackground && this.previousBackground ) {\n\n\t\t\t// Don't transition between identical backgrounds. This\n\t\t\t// prevents unwanted flicker.\n\t\t\tlet previousBackgroundHash = this.previousBackground.getAttribute( 'data-background-hash' );\n\t\t\tlet currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );\n\n\t\t\tif( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {\n\t\t\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t\t\t// If multiple slides have the same background video, carry\n\t\t\t\t// the element forward so that it plays continuously\n\t\t\t\t// across multiple slides\n\t\t\t\tconst currentVideo = currentBackground.querySelector( 'video' );\n\t\t\t\tconst previousVideo = this.previousBackground.querySelector( 'video' );\n\n\t\t\t\tif( currentVideo && previousVideo ) {\n\n\t\t\t\t\tconst currentVideoParent = currentVideo.parentNode;\n\t\t\t\t\tconst previousVideoParent = previousVideo.parentNode;\n\n\t\t\t\t\t// Swap the two videos\n\t\t\t\t\tpreviousVideoParent.appendChild( currentVideo );\n\t\t\t\t\tcurrentVideoParent.appendChild( previousVideo );\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t}\n\n\t\tconst backgroundChanged = currentBackground !== this.previousBackground;\n\n\t\t// Stop content inside of previous backgrounds\n\t\tif( backgroundChanged && this.previousBackground ) {\n\n\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );\n\n\t\t}\n\n\t\t// Start content in the current background\n\t\tif( backgroundChanged && currentBackground ) {\n\n\t\t\tthis.Reveal.slideContent.startEmbeddedContent( currentBackground );\n\n\t\t\tlet currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );\n\t\t\tif( currentBackgroundContent ) {\n\n\t\t\t\tlet backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';\n\n\t\t\t\t// Restart GIFs (doesn't work in Firefox)\n\t\t\t\tif( /\\.gif/i.test( backgroundImageURL ) ) {\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = '';\n\t\t\t\t\twindow.getComputedStyle( currentBackgroundContent ).opacity;\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = backgroundImageURL;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.previousBackground = currentBackground;\n\n\t\t}\n\n\t\t// If there's a background brightness flag for this slide,\n\t\t// bubble it to the .reveal container\n\t\tif( currentSlide ) {\n\t\t\tthis.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );\n\t\t}\n\n\t\t// Allow the first background to apply without transition\n\t\tsetTimeout( () => {\n\t\t\tthis.element.classList.remove( 'no-transition' );\n\t\t}, 10 );\n\n\t}\n\n\t/**\n\t * Updates the position of the parallax background based\n\t * on the current slide index.\n\t */\n\tupdateParallax() {\n\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tlet horizontalSlides = this.Reveal.getHorizontalSlides(),\n\t\t\t\tverticalSlides = this.Reveal.getVerticalSlides();\n\n\t\t\tlet backgroundSize = this.element.style.backgroundSize.split( ' ' ),\n\t\t\t\tbackgroundWidth, backgroundHeight;\n\n\t\t\tif( backgroundSize.length === 1 ) {\n\t\t\t\tbackgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundWidth = parseInt( backgroundSize[0], 10 );\n\t\t\t\tbackgroundHeight = parseInt( backgroundSize[1], 10 );\n\t\t\t}\n\n\t\t\tlet slideWidth = this.element.offsetWidth,\n\t\t\t\thorizontalSlideCount = horizontalSlides.length,\n\t\t\t\thorizontalOffsetMultiplier,\n\t\t\t\thorizontalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) {\n\t\t\t\thorizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal;\n\t\t\t}\n\t\t\telse {\n\t\t\t\thorizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;\n\t\t\t}\n\n\t\t\thorizontalOffset = horizontalOffsetMultiplier * indices.h * -1;\n\n\t\t\tlet slideHeight = this.element.offsetHeight,\n\t\t\t\tverticalSlideCount = verticalSlides.length,\n\t\t\t\tverticalOffsetMultiplier,\n\t\t\t\tverticalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) {\n\t\t\t\tverticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical;\n\t\t\t}\n\t\t\telse {\n\t\t\t\tverticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );\n\t\t\t}\n\n\t\t\tverticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0;\n\n\t\t\tthis.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';\n\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}\n","import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js'\nimport { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'\n\n// Counter used to generate unique IDs for auto-animated elements\nlet autoAnimateCounter = 0;\n\n/**\n * Automatically animates matching elements across\n * slides with the [data-auto-animate] attribute.\n */\nexport default class AutoAnimate {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Runs an auto-animation between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t */\n\trun( fromSlide, toSlide ) {\n\n\t\t// Clean up after prior animations\n\t\tthis.reset();\n\n\t\tlet allSlides = this.Reveal.getSlides();\n\t\tlet toSlideIndex = allSlides.indexOf( toSlide );\n\t\tlet fromSlideIndex = allSlides.indexOf( fromSlide );\n\n\t\t// Ensure that;\n\t\t// 1. Both slides exist.\n\t\t// 2. Both slides are auto-animate targets with the same\n\t\t// data-auto-animate-id value (including null if absent on both).\n\t\t// 3. data-auto-animate-restart isn't set on the physically latter\n\t\t// slide (independent of slide direction).\n\t\tif( fromSlide && toSlide && fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )\n\t\t\t\t&& fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) \n\t\t\t\t&& !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {\n\n\t\t\t// Create a new auto-animate sheet\n\t\t\tthis.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();\n\n\t\t\tlet animationOptions = this.getAutoAnimateOptions( toSlide );\n\n\t\t\t// Set our starting state\n\t\t\tfromSlide.dataset.autoAnimate = 'pending';\n\t\t\ttoSlide.dataset.autoAnimate = 'pending';\n\n\t\t\t// Flag the navigation direction, needed for fragment buildup\n\t\t\tanimationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward';\n\n\t\t\t// If the from-slide is hidden because it has moved outside\n\t\t\t// the view distance, we need to temporarily show it while\n\t\t\t// measuring\n\t\t\tlet fromSlideIsHidden = fromSlide.style.display === 'none';\n\t\t\tif( fromSlideIsHidden ) fromSlide.style.display = this.Reveal.getConfig().display;\n\n\t\t\t// Inject our auto-animate styles for this transition\n\t\t\tlet css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {\n\t\t\t\treturn this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );\n\t\t\t} );\n\n\t\t\tif( fromSlideIsHidden ) fromSlide.style.display = 'none';\n\n\t\t\t// Animate unmatched elements, if enabled\n\t\t\tif( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {\n\n\t\t\t\t// Our default timings for unmatched elements\n\t\t\t\tlet defaultUnmatchedDuration = animationOptions.duration * 0.8,\n\t\t\t\t\tdefaultUnmatchedDelay = animationOptions.duration * 0.2;\n\n\t\t\t\tthis.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {\n\n\t\t\t\t\tlet unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );\n\t\t\t\t\tlet id = 'unmatched';\n\n\t\t\t\t\t// If there is a duration or delay set specifically for this\n\t\t\t\t\t// element our unmatched elements should adhere to those\n\t\t\t\t\tif( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {\n\t\t\t\t\t\tid = 'unmatched-' + autoAnimateCounter++;\n\t\t\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"${id}\"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );\n\t\t\t\t\t}\n\n\t\t\t\t\tunmatchedElement.dataset.autoAnimateTarget = id;\n\n\t\t\t\t}, this );\n\n\t\t\t\t// Our default transition for unmatched elements\n\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"unmatched\"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );\n\n\t\t\t}\n\n\t\t\t// Setting the whole chunk of CSS at once is the most\n\t\t\t// efficient way to do this. Using sheet.insertRule\n\t\t\t// is multiple factors slower.\n\t\t\tthis.autoAnimateStyleSheet.innerHTML = css.join( '' );\n\n\t\t\t// Start the animation next cycle\n\t\t\trequestAnimationFrame( () => {\n\t\t\t\tif( this.autoAnimateStyleSheet ) {\n\t\t\t\t\t// This forces our newly injected styles to be applied in Firefox\n\t\t\t\t\tgetComputedStyle( this.autoAnimateStyleSheet ).fontWeight;\n\n\t\t\t\t\ttoSlide.dataset.autoAnimate = 'running';\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'autoanimate',\n\t\t\t\tdata: {\n\t\t\t\t\tfromSlide,\n\t\t\t\t\ttoSlide,\n\t\t\t\t\tsheet: this.autoAnimateStyleSheet\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Rolls back all changes that we've made to the DOM so\n\t * that as part of animating.\n\t */\n\treset() {\n\n\t\t// Reset slides\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=\"\"])' ).forEach( element => {\n\t\t\telement.dataset.autoAnimate = '';\n\t\t} );\n\n\t\t// Reset elements\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {\n\t\t\tdelete element.dataset.autoAnimateTarget;\n\t\t} );\n\n\t\t// Remove the animation sheet\n\t\tif( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {\n\t\t\tthis.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );\n\t\t\tthis.autoAnimateStyleSheet = null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a FLIP animation where the `to` element starts out\n\t * in the `from` element position and animates to its original\n\t * state.\n\t *\n\t * @param {HTMLElement} from\n\t * @param {HTMLElement} to\n\t * @param {Object} elementOptions Options for this element pair\n\t * @param {Object} animationOptions Options set at the slide level\n\t * @param {String} id Unique ID that we can use to identify this\n\t * auto-animate element in the DOM\n\t */\n\tautoAnimateElements( from, to, elementOptions, animationOptions, id ) {\n\n\t\t// 'from' elements are given a data-auto-animate-target with no value,\n\t\t// 'to' elements are are given a data-auto-animate-target with an ID\n\t\tfrom.dataset.autoAnimateTarget = '';\n\t\tto.dataset.autoAnimateTarget = id;\n\n\t\t// Each element may override any of the auto-animate options\n\t\t// like transition easing, duration and delay via data-attributes\n\t\tlet options = this.getAutoAnimateOptions( to, animationOptions );\n\n\t\t// If we're using a custom element matcher the element options\n\t\t// may contain additional transition overrides\n\t\tif( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;\n\t\tif( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;\n\t\tif( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;\n\n\t\tlet fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),\n\t\t\ttoProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );\n\n\t\tif( to.classList.contains( 'fragment' ) ) {\n\n\t\t\t// Don't auto-animate the opacity of fragments to avoid\n\t\t\t// conflicts with fragment animations\n\t\t\tdelete toProps.styles['opacity'];\n\n\t\t}\n\n\t\t// If translation and/or scaling are enabled, css transform\n\t\t// the 'to' element so that it matches the position and size\n\t\t// of the 'from' element\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\n\t\t\tlet presentationScale = this.Reveal.getScale();\n\n\t\t\tlet delta = {\n\t\t\t\tx: ( fromProps.x - toProps.x ) / presentationScale,\n\t\t\t\ty: ( fromProps.y - toProps.y ) / presentationScale,\n\t\t\t\tscaleX: fromProps.width / toProps.width,\n\t\t\t\tscaleY: fromProps.height / toProps.height\n\t\t\t};\n\n\t\t\t// Limit decimal points to avoid 0.0001px blur and stutter\n\t\t\tdelta.x = Math.round( delta.x * 1000 ) / 1000;\n\t\t\tdelta.y = Math.round( delta.y * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\n\t\t\tlet translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),\n\t\t\t\tscale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );\n\n\t\t\t// No need to transform if nothing's changed\n\t\t\tif( translate || scale ) {\n\n\t\t\t\tlet transform = [];\n\n\t\t\t\tif( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );\n\t\t\t\tif( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );\n\n\t\t\t\tfromProps.styles['transform'] = transform.join( ' ' );\n\t\t\t\tfromProps.styles['transform-origin'] = 'top left';\n\n\t\t\t\ttoProps.styles['transform'] = 'none';\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Delete all unchanged 'to' styles\n\t\tfor( let propertyName in toProps.styles ) {\n\t\t\tconst toValue = toProps.styles[propertyName];\n\t\t\tconst fromValue = fromProps.styles[propertyName];\n\n\t\t\tif( toValue === fromValue ) {\n\t\t\t\tdelete toProps.styles[propertyName];\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// If these property values were set via a custom matcher providing\n\t\t\t\t// an explicit 'from' and/or 'to' value, we always inject those values.\n\t\t\t\tif( toValue.explicitValue === true ) {\n\t\t\t\t\ttoProps.styles[propertyName] = toValue.value;\n\t\t\t\t}\n\n\t\t\t\tif( fromValue.explicitValue === true ) {\n\t\t\t\t\tfromProps.styles[propertyName] = fromValue.value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tlet css = '';\n\n\t\tlet toStyleProperties = Object.keys( toProps.styles );\n\n\t\t// Only create animate this element IF at least one style\n\t\t// property has changed\n\t\tif( toStyleProperties.length > 0 ) {\n\n\t\t\t// Instantly move to the 'from' state\n\t\t\tfromProps.styles['transition'] = 'none';\n\n\t\t\t// Animate towards the 'to' state\n\t\t\ttoProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;\n\t\t\ttoProps.styles['transition-property'] = toStyleProperties.join( ', ' );\n\t\t\ttoProps.styles['will-change'] = toStyleProperties.join( ', ' );\n\n\t\t\t// Build up our custom CSS. We need to override inline styles\n\t\t\t// so we need to make our styles vErY IMPORTANT!1!!\n\t\t\tlet fromCSS = Object.keys( fromProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tlet toCSS = Object.keys( toProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + toProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tcss = \t'[data-auto-animate-target=\"'+ id +'\"] {'+ fromCSS +'}' +\n\t\t\t\t\t'[data-auto-animate=\"running\"] [data-auto-animate-target=\"'+ id +'\"] {'+ toCSS +'}';\n\n\t\t}\n\n\t\treturn css;\n\n\t}\n\n\t/**\n\t * Returns the auto-animate options for the given element.\n\t *\n\t * @param {HTMLElement} element Element to pick up options\n\t * from, either a slide or an animation target\n\t * @param {Object} [inheritedOptions] Optional set of existing\n\t * options\n\t */\n\tgetAutoAnimateOptions( element, inheritedOptions ) {\n\n\t\tlet options = {\n\t\t\teasing: this.Reveal.getConfig().autoAnimateEasing,\n\t\t\tduration: this.Reveal.getConfig().autoAnimateDuration,\n\t\t\tdelay: 0\n\t\t};\n\n\t\toptions = extend( options, inheritedOptions );\n\n\t\t// Inherit options from parent elements\n\t\tif( element.parentNode ) {\n\t\t\tlet autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );\n\t\t\tif( autoAnimatedParent ) {\n\t\t\t\toptions = this.getAutoAnimateOptions( autoAnimatedParent, options );\n\t\t\t}\n\t\t}\n\n\t\tif( element.dataset.autoAnimateEasing ) {\n\t\t\toptions.easing = element.dataset.autoAnimateEasing;\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDuration ) {\n\t\t\toptions.duration = parseFloat( element.dataset.autoAnimateDuration );\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDelay ) {\n\t\t\toptions.delay = parseFloat( element.dataset.autoAnimateDelay );\n\t\t}\n\n\t\treturn options;\n\n\t}\n\n\t/**\n\t * Returns an object containing all of the properties\n\t * that can be auto-animated for the given element and\n\t * their current computed values.\n\t *\n\t * @param {String} direction 'from' or 'to'\n\t */\n\tgetAutoAnimatableProperties( direction, element, elementOptions ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\tlet properties = { styles: [] };\n\n\t\t// Position and size\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\t\t\tlet bounds;\n\n\t\t\t// Custom auto-animate may optionally return a custom tailored\n\t\t\t// measurement function\n\t\t\tif( typeof elementOptions.measure === 'function' ) {\n\t\t\t\tbounds = elementOptions.measure( element );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( config.center ) {\n\t\t\t\t\t// More precise, but breaks when used in combination\n\t\t\t\t\t// with zoom for scaling the deck ¯\\_(ツ)_/¯\n\t\t\t\t\tbounds = element.getBoundingClientRect();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tlet scale = this.Reveal.getScale();\n\t\t\t\t\tbounds = {\n\t\t\t\t\t\tx: element.offsetLeft * scale,\n\t\t\t\t\t\ty: element.offsetTop * scale,\n\t\t\t\t\t\twidth: element.offsetWidth * scale,\n\t\t\t\t\t\theight: element.offsetHeight * scale\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tproperties.x = bounds.x;\n\t\t\tproperties.y = bounds.y;\n\t\t\tproperties.width = bounds.width;\n\t\t\tproperties.height = bounds.height;\n\t\t}\n\n\t\tconst computedStyles = getComputedStyle( element );\n\n\t\t// CSS styles\n\t\t( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {\n\t\t\tlet value;\n\n\t\t\t// `style` is either the property name directly, or an object\n\t\t\t// definition of a style property\n\t\t\tif( typeof style === 'string' ) style = { property: style };\n\n\t\t\tif( typeof style.from !== 'undefined' && direction === 'from' ) {\n\t\t\t\tvalue = { value: style.from, explicitValue: true };\n\t\t\t}\n\t\t\telse if( typeof style.to !== 'undefined' && direction === 'to' ) {\n\t\t\t\tvalue = { value: style.to, explicitValue: true };\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Use a unitless value for line-height so that it inherits properly\n\t\t\t\tif( style.property === 'line-height' ) {\n\t\t\t\t\tvalue = parseFloat( computedStyles['line-height'] ) / parseFloat( computedStyles['font-size'] );\n\t\t\t\t}\n\n\t\t\t\tif( isNaN(value) ) {\n\t\t\t\t\tvalue = computedStyles[style.property];\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif( value !== '' ) {\n\t\t\t\tproperties.styles[style.property] = value;\n\t\t\t}\n\t\t} );\n\n\t\treturn properties;\n\n\t}\n\n\t/**\n\t * Get a list of all element pairs that we can animate\n\t * between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t *\n\t * @return {Array} Each value is an array where [0] is\n\t * the element we're animating from and [1] is the\n\t * element we're animating to\n\t */\n\tgetAutoAnimatableElements( fromSlide, toSlide ) {\n\n\t\tlet matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;\n\n\t\tlet pairs = matcher.call( this, fromSlide, toSlide );\n\n\t\tlet reserved = [];\n\n\t\t// Remove duplicate pairs\n\t\treturn pairs.filter( ( pair, index ) => {\n\t\t\tif( reserved.indexOf( pair.to ) === -1 ) {\n\t\t\t\treserved.push( pair.to );\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Identifies matching elements between slides.\n\t *\n\t * You can specify a custom matcher function by using\n\t * the `autoAnimateMatcher` config option.\n\t */\n\tgetAutoAnimatePairs( fromSlide, toSlide ) {\n\n\t\tlet pairs = [];\n\n\t\tconst codeNodes = 'pre';\n\t\tconst textNodes = 'h1, h2, h3, h4, h5, h6, p, li';\n\t\tconst mediaNodes = 'img, video, iframe';\n\n\t\t// Explicit matches via data-id\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {\n\t\t\treturn node.nodeName + ':::' + node.getAttribute( 'data-id' );\n\t\t} );\n\n\t\t// Text\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.textContent.trim();\n\t\t} );\n\n\t\t// Media\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {\n\t\t\treturn node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );\n\t\t} );\n\n\t\t// Code\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.textContent.trim();\n\t\t} );\n\n\t\tpairs.forEach( pair => {\n\t\t\t// Disable scale transformations on text nodes, we transition\n\t\t\t// each individual text property instead\n\t\t\tif( matches( pair.from, textNodes ) ) {\n\t\t\t\tpair.options = { scale: false };\n\t\t\t}\n\t\t\t// Animate individual lines of code\n\t\t\telse if( matches( pair.from, codeNodes ) ) {\n\n\t\t\t\t// Transition the code block's width and height instead of scaling\n\t\t\t\t// to prevent its content from being squished\n\t\t\t\tpair.options = { scale: false, styles: [ 'width', 'height' ] };\n\n\t\t\t\t// Lines of code\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {\n\t\t\t\t\treturn node.textContent;\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t\t// Line numbers\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {\n\t\t\t\t\treturn node.getAttribute( 'data-line-number' );\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [ 'width' ],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\treturn pairs;\n\n\t}\n\n\t/**\n\t * Helper method which returns a bounding box based on\n\t * the given elements offset coordinates.\n\t *\n\t * @param {HTMLElement} element\n\t * @return {Object} x, y, width, height\n\t */\n\tgetLocalBoundingBox( element ) {\n\n\t\tconst presentationScale = this.Reveal.getScale();\n\n\t\treturn {\n\t\t\tx: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,\n\t\t\ty: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,\n\t\t\twidth: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,\n\t\t\theight: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100\n\t\t};\n\n\t}\n\n\t/**\n\t * Finds matching elements between two slides.\n\t *\n\t * @param {Array} pairs \tList of pairs to push matches to\n\t * @param {HTMLElement} fromScope Scope within the from element exists\n\t * @param {HTMLElement} toScope Scope within the to element exists\n\t * @param {String} selector CSS selector of the element to match\n\t * @param {Function} serializer A function that accepts an element and returns\n\t * a stringified ID based on its contents\n\t * @param {Object} animationOptions Optional config options for this pair\n\t */\n\tfindAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {\n\n\t\tlet fromMatches = {};\n\t\tlet toMatches = {};\n\n\t\t[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\tif( typeof key === 'string' && key.length ) {\n\t\t\t\tfromMatches[key] = fromMatches[key] || [];\n\t\t\t\tfromMatches[key].push( element );\n\t\t\t}\n\t\t} );\n\n\t\t[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\ttoMatches[key] = toMatches[key] || [];\n\t\t\ttoMatches[key].push( element );\n\n\t\t\tlet fromElement;\n\n\t\t\t// Retrieve the 'from' element\n\t\t\tif( fromMatches[key] ) {\n\t\t\t\tconst primaryIndex = toMatches[key].length - 1;\n\t\t\t\tconst secondaryIndex = fromMatches[key].length - 1;\n\n\t\t\t\t// If there are multiple identical from elements, retrieve\n\t\t\t\t// the one at the same index as our to-element.\n\t\t\t\tif( fromMatches[key][ primaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ primaryIndex ];\n\t\t\t\t\tfromMatches[key][ primaryIndex ] = null;\n\t\t\t\t}\n\t\t\t\t// If there are no matching from-elements at the same index,\n\t\t\t\t// use the last one.\n\t\t\t\telse if( fromMatches[key][ secondaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ secondaryIndex ];\n\t\t\t\t\tfromMatches[key][ secondaryIndex ] = null;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we've got a matching pair, push it to the list of pairs\n\t\t\tif( fromElement ) {\n\t\t\t\tpairs.push({\n\t\t\t\t\tfrom: fromElement,\n\t\t\t\t\tto: element,\n\t\t\t\t\toptions: animationOptions\n\t\t\t\t});\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns a all elements within the given scope that should\n\t * be considered unmatched in an auto-animate transition. If\n\t * fading of unmatched elements is turned on, these elements\n\t * will fade when going between auto-animate slides.\n\t *\n\t * Note that parents of auto-animate targets are NOT considered\n\t * unmatched since fading them would break the auto-animation.\n\t *\n\t * @param {HTMLElement} rootElement\n\t * @return {Array}\n\t */\n\tgetUnmatchedAutoAnimateElements( rootElement ) {\n\n\t\treturn [].slice.call( rootElement.children ).reduce( ( result, element ) => {\n\n\t\t\tconst containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );\n\n\t\t\t// The element is unmatched if\n\t\t\t// - It is not an auto-animate target\n\t\t\t// - It does not contain any auto-animate targets\n\t\t\tif( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {\n\t\t\t\tresult.push( element );\n\t\t\t}\n\n\t\t\tif( element.querySelector( '[data-auto-animate-target]' ) ) {\n\t\t\t\tresult = result.concat( this.getUnmatchedAutoAnimateElements( element ) );\n\t\t\t}\n\n\t\t\treturn result;\n\n\t\t}, [] );\n\n\t}\n\n}\n","import { HORIZONTAL_SLIDES_SELECTOR, HORIZONTAL_BACKGROUNDS_SELECTOR } from '../utils/constants.js'\nimport { queryAll } from '../utils/util.js'\n\nconst HIDE_SCROLLBAR_TIMEOUT = 500;\nconst MAX_PROGRESS_SPACING = 4;\nconst MIN_PROGRESS_SEGMENT_HEIGHT = 6;\nconst MIN_PLAYHEAD_HEIGHT = 8;\n\n/**\n * The scroll view lets you read a reveal.js presentation\n * as a linear scrollable page.\n */\nexport default class ScrollView {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\t\tthis.activatedCallbacks = [];\n\n\t\tthis.onScroll = this.onScroll.bind( this );\n\n\t}\n\n\t/**\n\t * Activates the scroll view. This rearranges the presentation DOM\n\t * by—among other things—wrapping each slide in a page element.\n\t */\n\tactivate() {\n\n\t\tif( this.active ) return;\n\n\t\tconst stateBeforeActivation = this.Reveal.getState();\n\n\t\tthis.active = true;\n\n\t\t// Store the full presentation HTML so that we can restore it\n\t\t// when/if the scroll view is deactivated\n\t\tthis.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;\n\n\t\tconst horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );\n\t\tconst horizontalBackgrounds = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_BACKGROUNDS_SELECTOR );\n\n\t\tthis.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-scroll' );\n\n\t\tlet presentationBackground;\n\n\t\tconst viewportStyles = window.getComputedStyle( this.viewportElement );\n\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\tpresentationBackground = viewportStyles.background;\n\t\t}\n\n\t\tconst pageElements = [];\n\t\tconst pageContainer = horizontalSlides[0].parentNode;\n\n\t\tlet previousSlide;\n\n\t\t// Creates a new page element and appends the given slide/bg\n\t\t// to it.\n\t\tconst createPageElement = ( slide, h, v, isVertical ) => {\n\n\t\t\tlet contentContainer;\n\n\t\t\t// If this slide is part of an auto-animation sequence, we\n\t\t\t// group it under the same page element as the previous slide\n\t\t\tif( previousSlide && this.Reveal.shouldAutoAnimateBetween( previousSlide, slide ) ) {\n\t\t\t\tcontentContainer = document.createElement( 'div' );\n\t\t\t\tcontentContainer.className = 'scroll-page-content scroll-auto-animate-page';\n\t\t\t\tcontentContainer.style.display = 'none';\n\t\t\t\tpreviousSlide.closest( '.scroll-page-content' ).parentNode.appendChild( contentContainer );\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpage.className = 'scroll-page';\n\t\t\t\tpageElements.push( page );\n\n\t\t\t\t// This transfers over the background of the vertical stack containing\n\t\t\t\t// the slide if it exists. Otherwise, it uses the presentation-wide\n\t\t\t\t// background.\n\t\t\t\tif( isVertical && horizontalBackgrounds.length > h ) {\n\t\t\t\t\tconst slideBackground = horizontalBackgrounds[h];\n\t\t\t\t\tconst pageBackground = window.getComputedStyle( slideBackground );\n\n\t\t\t\t\tif( pageBackground && pageBackground.background ) {\n\t\t\t\t\t\tpage.style.background = pageBackground.background;\n\t\t\t\t\t}\n\t\t\t\t\telse if( presentationBackground ) {\n\t\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t\t}\n\t\t\t\t} else if( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tconst stickyContainer = document.createElement( 'div' );\n\t\t\t\tstickyContainer.className = 'scroll-page-sticky';\n\t\t\t\tpage.appendChild( stickyContainer );\n\n\t\t\t\tcontentContainer = document.createElement( 'div' );\n\t\t\t\tcontentContainer.className = 'scroll-page-content';\n\t\t\t\tstickyContainer.appendChild( contentContainer );\n\t\t\t}\n\n\t\t\tcontentContainer.appendChild( slide );\n\n\t\t\tslide.classList.remove( 'past', 'future' );\n\t\t\tslide.setAttribute( 'data-index-h', h );\n\t\t\tslide.setAttribute( 'data-index-v', v );\n\n\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\tslide.slideBackgroundElement.remove( 'past', 'future' );\n\t\t\t\tcontentContainer.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t}\n\n\t\t\tpreviousSlide = slide;\n\n\t\t}\n\n\t\t// Slide and slide background layout\n\t\thorizontalSlides.forEach( ( horizontalSlide, h ) => {\n\n\t\t\tif( this.Reveal.isVerticalStack( horizontalSlide ) ) {\n\t\t\t\thorizontalSlide.querySelectorAll( 'section' ).forEach( ( verticalSlide, v ) => {\n\t\t\t\t\tcreatePageElement( verticalSlide, h, v, true );\n\t\t\t\t});\n\t\t\t}\n\t\t\telse {\n\t\t\t\tcreatePageElement( horizontalSlide, h, 0 );\n\t\t\t}\n\n\t\t}, this );\n\n\t\tthis.createProgressBar();\n\n\t\t// Remove leftover stacks\n\t\tqueryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );\n\n\t\t// Add our newly created pages to the DOM\n\t\tpageElements.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Re-run JS-based content layout after the slide is added to page DOM\n\t\tthis.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );\n\n\t\tthis.Reveal.layout();\n\t\tthis.Reveal.setState( stateBeforeActivation );\n\n\t\tthis.activatedCallbacks.forEach( callback => callback() );\n\t\tthis.activatedCallbacks = [];\n\n\t\tthis.restoreScrollPosition();\n\n\t\tthis.viewportElement.classList.remove( 'loading-scroll-mode' );\n\t\tthis.viewportElement.addEventListener( 'scroll', this.onScroll, { passive: true } );\n\n\t}\n\n\t/**\n\t * Deactivates the scroll view and restores the standard slide-based\n\t * presentation.\n\t */\n\tdeactivate() {\n\n\t\tif( !this.active ) return;\n\n\t\tconst stateBeforeDeactivation = this.Reveal.getState();\n\n\t\tthis.active = false;\n\n\t\tthis.viewportElement.removeEventListener( 'scroll', this.onScroll );\n\t\tthis.viewportElement.classList.remove( 'reveal-scroll' );\n\n\t\tthis.removeProgressBar();\n\n\t\tthis.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;\n\t\tthis.Reveal.sync();\n\t\tthis.Reveal.setState( stateBeforeDeactivation );\n\n\t\tthis.slideHTMLBeforeActivation = null;\n\n\t}\n\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the scroll view is currently active.\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Renders the progress bar component.\n\t */\n\tcreateProgressBar() {\n\n\t\tthis.progressBar = document.createElement( 'div' );\n\t\tthis.progressBar.className = 'scrollbar';\n\n\t\tthis.progressBarInner = document.createElement( 'div' );\n\t\tthis.progressBarInner.className = 'scrollbar-inner';\n\t\tthis.progressBar.appendChild( this.progressBarInner );\n\n\t\tthis.progressBarPlayhead = document.createElement( 'div' );\n\t\tthis.progressBarPlayhead.className = 'scrollbar-playhead';\n\t\tthis.progressBarInner.appendChild( this.progressBarPlayhead );\n\n\t\tthis.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );\n\n\t\tconst handleDocumentMouseMove\t= ( event ) => {\n\n\t\t\tlet progress = ( event.clientY - this.progressBarInner.getBoundingClientRect().top ) / this.progressBarHeight;\n\t\t\tprogress = Math.max( Math.min( progress, 1 ), 0 );\n\n\t\t\tthis.viewportElement.scrollTop = progress * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );\n\n\t\t};\n\n\t\tconst handleDocumentMouseUp = ( event ) => {\n\n\t\t\tthis.draggingProgressBar = false;\n\t\t\tthis.showProgressBar();\n\n\t\t\tdocument.removeEventListener( 'mousemove', handleDocumentMouseMove );\n\t\t\tdocument.removeEventListener( 'mouseup', handleDocumentMouseUp );\n\n\t\t};\n\n\t\tconst handleMouseDown = ( event ) => {\n\n\t\t\tevent.preventDefault();\n\n\t\t\tthis.draggingProgressBar = true;\n\n\t\t\tdocument.addEventListener( 'mousemove', handleDocumentMouseMove );\n\t\t\tdocument.addEventListener( 'mouseup', handleDocumentMouseUp );\n\n\t\t\thandleDocumentMouseMove( event );\n\n\t\t};\n\n\t\tthis.progressBarInner.addEventListener( 'mousedown', handleMouseDown );\n\n\t}\n\n\tremoveProgressBar() {\n\n\t\tif( this.progressBar ) {\n\t\t\tthis.progressBar.remove();\n\t\t\tthis.progressBar = null;\n\t\t}\n\n\t}\n\n\tlayout() {\n\n\t\tif( this.isActive() ) {\n\t\t\tthis.syncPages();\n\t\t\tthis.syncScrollPosition();\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates our pages to match the latest configuration and\n\t * presentation size.\n\t */\n\tsyncPages() {\n\n\t\tconst config = this.Reveal.getConfig();\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\t\tconst scale = this.Reveal.getScale();\n\t\tconst useCompactLayout = config.scrollLayout === 'compact';\n\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst compactHeight = slideSize.height * scale;\n\t\tconst pageHeight = useCompactLayout ? compactHeight : viewportHeight;\n\n\t\t// The height that needs to be scrolled between scroll triggers\n\t\tthis.scrollTriggerHeight = useCompactLayout ? compactHeight : viewportHeight;\n\n\t\tthis.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );\n\t\tthis.viewportElement.style.scrollSnapType = typeof config.scrollSnap === 'string' ? `y ${config.scrollSnap}` : '';\n\n\t\t// This will hold all scroll triggers used to show/hide slides\n\t\tthis.slideTriggers = [];\n\n\t\tconst pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.scroll-page' ) );\n\n\t\tthis.pages = pageElements.map( pageElement => {\n\t\t\tconst page = this.createPage({\n\t\t\t\tpageElement,\n\t\t\t\tslideElement: pageElement.querySelector( 'section' ),\n\t\t\t\tstickyElement: pageElement.querySelector( '.scroll-page-sticky' ),\n\t\t\t\tcontentElement: pageElement.querySelector( '.scroll-page-content' ),\n\t\t\t\tbackgroundElement: pageElement.querySelector( '.slide-background' ),\n\t\t\t\tautoAnimateElements: pageElement.querySelectorAll( '.scroll-auto-animate-page' ),\n\t\t\t\tautoAnimatePages: []\n\t\t\t});\n\n\t\t\tpage.pageElement.style.setProperty( '--slide-height', config.center === true ? 'auto' : slideSize.height + 'px' );\n\n\t\t\tthis.slideTriggers.push({\n\t\t\t\tpage: page,\n\t\t\t\tactivate: () => this.activatePage( page ),\n\t\t\t\tdeactivate: () => this.deactivatePage( page )\n\t\t\t});\n\n\t\t\t// Create scroll triggers that show/hide fragments\n\t\t\tthis.createFragmentTriggersForPage( page );\n\n\t\t\t// Create scroll triggers for triggering auto-animate steps\n\t\t\tif( page.autoAnimateElements.length > 0 ) {\n\t\t\t\tthis.createAutoAnimateTriggersForPage( page );\n\t\t\t}\n\n\t\t\tlet totalScrollTriggerCount = Math.max( page.scrollTriggers.length - 1, 0 );\n\n\t\t\t// Each auto-animate step may include its own scroll triggers\n\t\t\t// for fragments, ensure we count those as well\n\t\t\ttotalScrollTriggerCount += page.autoAnimatePages.reduce( ( total, page ) => {\n\t\t\t\treturn total + Math.max( page.scrollTriggers.length - 1, 0 );\n\t\t\t}, page.autoAnimatePages.length );\n\n\t\t\t// Clean up from previous renders\n\t\t\tpage.pageElement.querySelectorAll( '.scroll-snap-point' ).forEach( el => el.remove() );\n\n\t\t\t// Create snap points for all scroll triggers\n\t\t\t// - Can't be absolute in FF\n\t\t\t// - Can't be 0-height in Safari\n\t\t\t// - Can't use snap-align on parent in Safari because then\n\t\t\t// inner triggers won't work\n\t\t\tfor( let i = 0; i < totalScrollTriggerCount + 1; i++ ) {\n\t\t\t\tconst triggerStick = document.createElement( 'div' );\n\t\t\t\ttriggerStick.className = 'scroll-snap-point';\n\t\t\t\ttriggerStick.style.height = this.scrollTriggerHeight + 'px';\n\t\t\t\ttriggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';\n\t\t\t\tpage.pageElement.appendChild( triggerStick );\n\n\t\t\t\tif( i === 0 ) {\n\t\t\t\t\ttriggerStick.style.marginTop = -this.scrollTriggerHeight + 'px';\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// In the compact layout, only slides with scroll triggers cover the\n\t\t\t// full viewport height. This helps avoid empty gaps before or after\n\t\t\t// a sticky slide.\n\t\t\tif( useCompactLayout && page.scrollTriggers.length > 0 ) {\n\t\t\t\tpage.pageHeight = viewportHeight;\n\t\t\t\tpage.pageElement.style.setProperty( '--page-height', viewportHeight + 'px' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpage.pageHeight = pageHeight;\n\t\t\t\tpage.pageElement.style.removeProperty( '--page-height' );\n\t\t\t}\n\n\t\t\t// Add scroll padding based on how many scroll triggers we have\n\t\t\tpage.scrollPadding = this.scrollTriggerHeight * totalScrollTriggerCount;\n\n\t\t\t// The total height including scrollable space\n\t\t\tpage.totalHeight = page.pageHeight + page.scrollPadding;\n\n\t\t\t// This is used to pad the height of our page in CSS\n\t\t\tpage.pageElement.style.setProperty( '--page-scroll-padding', page.scrollPadding + 'px' );\n\n\t\t\t// If this is a sticky page, stick it to the vertical center\n\t\t\tif( totalScrollTriggerCount > 0 ) {\n\t\t\t\tpage.stickyElement.style.position = 'sticky';\n\t\t\t\tpage.stickyElement.style.top = Math.max( ( viewportHeight - page.pageHeight ) / 2, 0 ) + 'px';\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpage.stickyElement.style.position = 'relative';\n\t\t\t\tpage.pageElement.style.scrollSnapAlign = page.pageHeight < viewportHeight ? 'center' : 'start';\n\t\t\t}\n\n\t\t\treturn page;\n\t\t} );\n\n\t\tthis.setTriggerRanges();\n\n\t\t/*\n\t\tconsole.log(this.slideTriggers.map( t => {\n\t\t\treturn {\n\t\t\t\trange: `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`,\n\t\t\t\ttriggers: t.page.scrollTriggers.map( t => {\n\t\t\t\t\treturn `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`\n\t\t\t\t}).join( ', ' ),\n\t\t\t}\n\t\t}))\n\t\t*/\n\n\t\tthis.viewportElement.setAttribute( 'data-scrollbar', config.scrollProgress );\n\n\t\tif( config.scrollProgress && this.totalScrollTriggerCount > 1 ) {\n\t\t\t// Create the progress bar if it doesn't already exist\n\t\t\tif( !this.progressBar ) this.createProgressBar();\n\n\t\t\tthis.syncProgressBar();\n\t\t}\n\t\telse {\n\t\t\tthis.removeProgressBar();\n\t\t}\n\n\t}\n\n\t/**\n\t * Calculates and sets the scroll range for all of our scroll\n\t * triggers.\n\t */\n\tsetTriggerRanges() {\n\n\t\t// Calculate the total number of scroll triggers\n\t\tthis.totalScrollTriggerCount = this.slideTriggers.reduce( ( total, trigger ) => {\n\t\t\treturn total + Math.max( trigger.page.scrollTriggers.length, 1 );\n\t\t}, 0 );\n\n\t\tlet rangeStart = 0;\n\n\t\t// Calculate the scroll range of each scroll trigger on a scale\n\t\t// of 0-1\n\t\tthis.slideTriggers.forEach( ( trigger, i ) => {\n\t\t\ttrigger.range = [\n\t\t\t\trangeStart,\n\t\t\t\trangeStart + Math.max( trigger.page.scrollTriggers.length, 1 ) / this.totalScrollTriggerCount\n\t\t\t];\n\n\t\t\tconst scrollTriggerSegmentSize = ( trigger.range[1] - trigger.range[0] ) / trigger.page.scrollTriggers.length;\n\t\t\t// Set the range for each inner scroll trigger\n\t\t\ttrigger.page.scrollTriggers.forEach( ( scrollTrigger, i ) => {\n\t\t\t\tscrollTrigger.range = [\n\t\t\t\t\trangeStart + i * scrollTriggerSegmentSize,\n\t\t\t\t\trangeStart + ( i + 1 ) * scrollTriggerSegmentSize\n\t\t\t\t];\n\t\t\t} );\n\n\t\t\trangeStart = trigger.range[1];\n\t\t} );\n\n\t\t// Ensure the last trigger extends to the end of the page, otherwise\n\t\t// rounding errors can cause the last trigger to end at 0.999999...\n\t\tthis.slideTriggers[this.slideTriggers.length - 1].range[1] = 1;\n\n\t}\n\n\t/**\n\t * Creates one scroll trigger for each fragments in the given page.\n\t *\n\t * @param {*} page\n\t */\n\tcreateFragmentTriggersForPage( page, slideElement ) {\n\n\t\tslideElement = slideElement || page.slideElement;\n\n\t\t// Each fragment 'group' is an array containing one or more\n\t\t// fragments. Multiple fragments that appear at the same time\n\t\t// are part of the same group.\n\t\tconst fragmentGroups = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment' ), true );\n\n\t\t// Create scroll triggers that show/hide fragments\n\t\tif( fragmentGroups.length ) {\n\t\t\tpage.fragments = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tpage.scrollTriggers.push(\n\t\t\t\t// Trigger for the initial state with no fragments visible\n\t\t\t\t{\n\t\t\t\t\tactivate: () => {\n\t\t\t\t\t\tthis.Reveal.fragments.update( -1, page.fragments, slideElement );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t);\n\n\t\t\t// Triggers for each fragment group\n\t\t\tfragmentGroups.forEach( ( fragments, i ) => {\n\t\t\t\tpage.scrollTriggers.push({\n\t\t\t\t\tactivate: () => {\n\t\t\t\t\t\tthis.Reveal.fragments.update( i, page.fragments, slideElement );\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t} );\n\t\t}\n\n\n\t\treturn page.scrollTriggers.length;\n\n\t}\n\n\t/**\n\t * Creates scroll triggers for the auto-animate steps in the\n\t * given page.\n\t *\n\t * @param {*} page\n\t */\n\tcreateAutoAnimateTriggersForPage( page ) {\n\n\t\tif( page.autoAnimateElements.length > 0 ) {\n\n\t\t\t// Triggers for each subsequent auto-animate slide\n\t\t\tthis.slideTriggers.push( ...Array.from( page.autoAnimateElements ).map( ( autoAnimateElement, i ) => {\n\t\t\t\tlet autoAnimatePage = this.createPage({\n\t\t\t\t\tslideElement: autoAnimateElement.querySelector( 'section' ),\n\t\t\t\t\tcontentElement: autoAnimateElement,\n\t\t\t\t\tbackgroundElement: autoAnimateElement.querySelector( '.slide-background' )\n\t\t\t\t});\n\n\t\t\t\t// Create fragment scroll triggers for the auto-animate slide\n\t\t\t\tthis.createFragmentTriggersForPage( autoAnimatePage, autoAnimatePage.slideElement );\n\n\t\t\t\tpage.autoAnimatePages.push( autoAnimatePage );\n\n\t\t\t\t// Return our slide trigger\n\t\t\t\treturn {\n\t\t\t\t\tpage: autoAnimatePage,\n\t\t\t\t\tactivate: () => this.activatePage( autoAnimatePage ),\n\t\t\t\t\tdeactivate: () => this.deactivatePage( autoAnimatePage )\n\t\t\t\t};\n\t\t\t}));\n\t\t}\n\n\t}\n\n\t/**\n\t * Helper method for creating a page definition and adding\n\t * required fields. A \"page\" is a slide or auto-animate step.\n\t */\n\tcreatePage( page ) {\n\n\t\tpage.scrollTriggers = [];\n\t\tpage.indexh = parseInt( page.slideElement.getAttribute( 'data-index-h' ), 10 );\n\t\tpage.indexv = parseInt( page.slideElement.getAttribute( 'data-index-v' ), 10 );\n\n\t\treturn page;\n\n\t}\n\n\t/**\n\t * Rerenders progress bar segments so that they match the current\n\t * reveal.js config and size.\n\t */\n\tsyncProgressBar() {\n\n\t\tthis.progressBarInner.querySelectorAll( '.scrollbar-slide' ).forEach( slide => slide.remove() );\n\n\t\tconst scrollHeight = this.viewportElement.scrollHeight;\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst viewportHeightFactor = viewportHeight / scrollHeight;\n\n\t\tthis.progressBarHeight = this.progressBarInner.offsetHeight;\n\t\tthis.playheadHeight = Math.max( viewportHeightFactor * this.progressBarHeight, MIN_PLAYHEAD_HEIGHT );\n\t\tthis.progressBarScrollableHeight = this.progressBarHeight - this.playheadHeight;\n\n\t\tconst progressSegmentHeight = viewportHeight / scrollHeight * this.progressBarHeight;\n\t\tconst spacing = Math.min( progressSegmentHeight / 8, MAX_PROGRESS_SPACING );\n\n\t\tthis.progressBarPlayhead.style.height = this.playheadHeight - spacing + 'px';\n\n\t\t// Don't show individual segments if they're too small\n\t\tif( progressSegmentHeight > MIN_PROGRESS_SEGMENT_HEIGHT ) {\n\n\t\t\tthis.slideTriggers.forEach( slideTrigger => {\n\n\t\t\t\tconst { page } = slideTrigger;\n\n\t\t\t\t// Visual representation of a slide\n\t\t\t\tpage.progressBarSlide = document.createElement( 'div' );\n\t\t\t\tpage.progressBarSlide.className = 'scrollbar-slide';\n\t\t\t\tpage.progressBarSlide.style.top = slideTrigger.range[0] * this.progressBarHeight + 'px';\n\t\t\t\tpage.progressBarSlide.style.height = ( slideTrigger.range[1] - slideTrigger.range[0] ) * this.progressBarHeight - spacing + 'px';\n\t\t\t\tpage.progressBarSlide.classList.toggle( 'has-triggers', page.scrollTriggers.length > 0 );\n\t\t\t\tthis.progressBarInner.appendChild( page.progressBarSlide );\n\n\t\t\t\t// Visual representations of each scroll trigger\n\t\t\t\tpage.scrollTriggerElements = page.scrollTriggers.map( ( trigger, i ) => {\n\n\t\t\t\t\tconst triggerElement = document.createElement( 'div' );\n\t\t\t\t\ttriggerElement.className = 'scrollbar-trigger';\n\t\t\t\t\ttriggerElement.style.top = ( trigger.range[0] - slideTrigger.range[0] ) * this.progressBarHeight + 'px';\n\t\t\t\t\ttriggerElement.style.height = ( trigger.range[1] - trigger.range[0] ) * this.progressBarHeight - spacing + 'px';\n\t\t\t\t\tpage.progressBarSlide.appendChild( triggerElement );\n\n\t\t\t\t\tif( i === 0 ) triggerElement.style.display = 'none';\n\n\t\t\t\t\treturn triggerElement;\n\n\t\t\t\t} );\n\n\t\t\t} );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.pages.forEach( page => page.progressBarSlide = null );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Reads the current scroll position and updates our active\n\t * trigger states accordingly.\n\t */\n\tsyncScrollPosition() {\n\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst viewportHeightFactor = viewportHeight / this.viewportElement.scrollHeight;\n\n\t\tconst scrollTop = this.viewportElement.scrollTop;\n\t\tconst scrollHeight = this.viewportElement.scrollHeight - viewportHeight\n\t\tconst scrollProgress = Math.max( Math.min( scrollTop / scrollHeight, 1 ), 0 );\n\t\tconst scrollProgressMid = Math.max( Math.min( ( scrollTop + viewportHeight / 2 ) / this.viewportElement.scrollHeight, 1 ), 0 );\n\n\t\tlet activePage;\n\n\t\tthis.slideTriggers.forEach( ( trigger ) => {\n\t\t\tconst { page } = trigger;\n\n\t\t\tconst shouldPreload = scrollProgress >= trigger.range[0] - viewportHeightFactor*2 &&\n\t\t\t\t\t\t\t\t\t\t\t\t\t\tscrollProgress <= trigger.range[1] + viewportHeightFactor*2;\n\n\t\t\t// Load slides that are within the preload range\n\t\t\tif( shouldPreload && !page.loaded ) {\n\t\t\t\tpage.loaded = true;\n\t\t\t\tthis.Reveal.slideContent.load( page.slideElement );\n\t\t\t}\n\t\t\telse if( page.loaded ) {\n\t\t\t\tpage.loaded = false;\n\t\t\t\tthis.Reveal.slideContent.unload( page.slideElement );\n\t\t\t}\n\n\t\t\t// If we're within this trigger range, activate it\n\t\t\tif( scrollProgress >= trigger.range[0] && scrollProgress <= trigger.range[1] ) {\n\t\t\t\tthis.activateTrigger( trigger );\n\t\t\t\tactivePage = trigger.page;\n\t\t\t}\n\t\t\t// .. otherwise deactivate\n\t\t\telse if( trigger.active ) {\n\t\t\t\tthis.deactivateTrigger( trigger );\n\t\t\t}\n\t\t} );\n\n\t\t// Each page can have its own scroll triggers, check if any of those\n\t\t// need to be activated/deactivated\n\t\tif( activePage ) {\n\t\t\tactivePage.scrollTriggers.forEach( ( trigger ) => {\n\t\t\t\tif( scrollProgressMid >= trigger.range[0] && scrollProgressMid <= trigger.range[1] ) {\n\t\t\t\t\tthis.activateTrigger( trigger );\n\t\t\t\t}\n\t\t\t\telse if( trigger.active ) {\n\t\t\t\t\tthis.deactivateTrigger( trigger );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\t// Update our visual progress indication\n\t\tthis.setProgressBarValue( scrollTop / ( this.viewportElement.scrollHeight - viewportHeight ) );\n\n\t}\n\n\t/**\n\t * Moves the progress bar playhead to the specified position.\n\t *\n\t * @param {number} progress 0-1\n\t */\n\tsetProgressBarValue( progress ) {\n\n\t\tif( this.progressBar ) {\n\n\t\t\tthis.progressBarPlayhead.style.transform = `translateY(${progress * this.progressBarScrollableHeight}px)`;\n\n\t\t\tthis.getAllPages()\n\t\t\t\t.filter( page => page.progressBarSlide )\n\t\t\t\t.forEach( ( page ) => {\n\t\t\t\t\tpage.progressBarSlide.classList.toggle( 'active', page.active === true );\n\n\t\t\t\t\tpage.scrollTriggers.forEach( ( trigger, i ) => {\n\t\t\t\t\t\tpage.scrollTriggerElements[i].classList.toggle( 'active', page.active === true && trigger.active === true );\n\t\t\t\t\t} );\n\t\t\t\t} );\n\n\t\t\tthis.showProgressBar();\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Show the progress bar and, if configured, automatically hide\n\t * it after a delay.\n\t */\n\tshowProgressBar() {\n\n\t\tthis.progressBar.classList.add( 'visible' );\n\n\t\tclearTimeout( this.hideProgressBarTimeout );\n\n\t\tif( this.Reveal.getConfig().scrollProgress === 'auto' && !this.draggingProgressBar ) {\n\n\t\t\tthis.hideProgressBarTimeout = setTimeout( () => {\n\t\t\t\tif( this.progressBar ) {\n\t\t\t\t\tthis.progressBar.classList.remove( 'visible' );\n\t\t\t\t}\n\t\t\t}, HIDE_SCROLLBAR_TIMEOUT );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Scroll to the previous page.\n\t */\n\tprev() {\n\n\t\tthis.viewportElement.scrollTop -= this.scrollTriggerHeight;\n\n\t}\n\n\t/**\n\t * Scroll to the next page.\n\t */\n\tnext() {\n\n\t\tthis.viewportElement.scrollTop += this.scrollTriggerHeight;\n\n\t}\n\n\t/**\n\t * Scrolls the given slide element into view.\n\t *\n\t * @param {HTMLElement} slideElement\n\t */\n\tscrollToSlide( slideElement ) {\n\n\t\t// If the scroll view isn't active yet, queue this action\n\t\tif( !this.active ) {\n\t\t\tthis.activatedCallbacks.push( () => this.scrollToSlide( slideElement ) );\n\t\t}\n\t\telse {\n\t\t\t// Find the trigger for this slide\n\t\t\tconst trigger = this.getScrollTriggerBySlide( slideElement );\n\n\t\t\tif( trigger ) {\n\t\t\t\t// Use the trigger's range to calculate the scroll position\n\t\t\t\tthis.viewportElement.scrollTop = trigger.range[0] * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Persists the current scroll position to session storage\n\t * so that it can be restored.\n\t */\n\tstoreScrollPosition() {\n\n\t\tclearTimeout( this.storeScrollPositionTimeout );\n\n\t\tthis.storeScrollPositionTimeout = setTimeout( () => {\n\t\t\tsessionStorage.setItem( 'reveal-scroll-top', this.viewportElement.scrollTop );\n\t\t\tsessionStorage.setItem( 'reveal-scroll-origin', location.origin + location.pathname );\n\n\t\t\tthis.storeScrollPositionTimeout = null;\n\t\t}, 50 );\n\n\t}\n\n\t/**\n\t * Restores the scroll position when a deck is reloader.\n\t */\n\trestoreScrollPosition() {\n\n\t\tconst scrollPosition = sessionStorage.getItem( 'reveal-scroll-top' );\n\t\tconst scrollOrigin = sessionStorage.getItem( 'reveal-scroll-origin' );\n\n\t\tif( scrollPosition && scrollOrigin === location.origin + location.pathname ) {\n\t\t\tthis.viewportElement.scrollTop = parseInt( scrollPosition, 10 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Activates the given page and starts its embedded content\n\t * if there is any.\n\t *\n\t * @param {object} page\n\t */\n\tactivatePage( page ) {\n\n\t\tif( !page.active ) {\n\n\t\t\tpage.active = true;\n\n\t\t\tconst { slideElement, backgroundElement, contentElement, indexh, indexv } = page;\n\n\t\t\tcontentElement.style.display = 'block';\n\n\t\t\tslideElement.classList.add( 'present' );\n\n\t\t\tif( backgroundElement ) {\n\t\t\t\tbackgroundElement.classList.add( 'present' );\n\t\t\t}\n\n\t\t\tthis.Reveal.setCurrentScrollPage( slideElement, indexh, indexv );\n\t\t\tthis.Reveal.backgrounds.bubbleSlideContrastClassToElement( slideElement, this.viewportElement );\n\n\t\t\t// If this page is part of an auto-animation there will be one\n\t\t\t// content element per auto-animated page. We need to show the\n\t\t\t// current page and hide all others.\n\t\t\tArray.from( contentElement.parentNode.querySelectorAll( '.scroll-page-content' ) ).forEach( sibling => {\n\t\t\t\tif( sibling !== contentElement ) {\n\t\t\t\t\tsibling.style.display = 'none';\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Deactivates the page after it has been visible.\n\t *\n\t * @param {object} page\n\t */\n\tdeactivatePage( page ) {\n\n\t\tif( page.active ) {\n\n\t\t\tpage.active = false;\n\t\t\tif( page.slideElement ) page.slideElement.classList.remove( 'present' );\n\t\t\tif( page.backgroundElement ) page.backgroundElement.classList.remove( 'present' );\n\n\t\t}\n\n\t}\n\n\tactivateTrigger( trigger ) {\n\n\t\tif( !trigger.active ) {\n\t\t\ttrigger.active = true;\n\t\t\ttrigger.activate();\n\t\t}\n\n\t}\n\n\tdeactivateTrigger( trigger ) {\n\n\t\tif( trigger.active ) {\n\t\t\ttrigger.active = false;\n\n\t\t\tif( trigger.deactivate ) {\n\t\t\t\ttrigger.deactivate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Retrieve a slide by its original h/v index (i.e. the indices the\n\t * slide had before being linearized).\n\t *\n\t * @param {number} h\n\t * @param {number} v\n\t * @returns {HTMLElement}\n\t */\n\tgetSlideByIndices( h, v ) {\n\n\t\tconst page = this.getAllPages().find( page => {\n\t\t\treturn page.indexh === h && page.indexv === v;\n\t\t} );\n\n\t\treturn page ? page.slideElement : null;\n\n\t}\n\n\t/**\n\t * Retrieve a list of all scroll triggers for the given slide\n\t * DOM element.\n\t *\n\t * @param {HTMLElement} slide\n\t * @returns {Array}\n\t */\n\tgetScrollTriggerBySlide( slide ) {\n\n\t\treturn this.slideTriggers.find( trigger => trigger.page.slideElement === slide );\n\n\t}\n\n\t/**\n\t * Get a list of all pages in the scroll view. This includes\n\t * both top-level slides and auto-animate steps.\n\t *\n\t * @returns {Array}\n\t */\n\tgetAllPages() {\n\n\t\treturn this.pages.flatMap( page => [page, ...(page.autoAnimatePages || [])] );\n\n\t}\n\n\tonScroll() {\n\n\t\tthis.syncScrollPosition();\n\t\tthis.storeScrollPosition();\n\n\t}\n\n\tget viewportElement() {\n\n\t\treturn this.Reveal.getViewportElement();\n\n\t}\n\n}\n","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { queryAll, createStyleSheet } from '../utils/util.js'\n\n/**\n * Setups up our presentation for printing/exporting to PDF.\n */\nexport default class PrintView {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Configures the presentation for printing to a static\n\t * PDF.\n\t */\n\tasync activate() {\n\n\t\tconst config = this.Reveal.getConfig();\n\t\tconst slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )\n\n\t\t// Compute slide numbers now, before we start duplicating slides\n\t\tconst injectPageNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\n\t\t// Dimensions of the PDF pages\n\t\tconst pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),\n\t\t\tpageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );\n\n\t\t// Dimensions of slides within the pages\n\t\tconst slideWidth = slideSize.width,\n\t\t\tslideHeight = slideSize.height;\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\t// Let the browser know what page size we want to print\n\t\tcreateStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );\n\n\t\t// Limit the size of certain elements to the dimensions of the slide\n\t\tcreateStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );\n\n\t\tdocument.documentElement.classList.add( 'reveal-print', 'print-pdf' );\n\t\tdocument.body.style.width = pageWidth + 'px';\n\t\tdocument.body.style.height = pageHeight + 'px';\n\n\t\tconst viewportElement = this.Reveal.getViewportElement();\n\t\tlet presentationBackground;\n\t\tif( viewportElement ) {\n\t\t\tconst viewportStyles = window.getComputedStyle( viewportElement );\n\t\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\t\tpresentationBackground = viewportStyles.background;\n\t\t\t}\n\t\t}\n\n\t\t// Make sure stretch elements fit on slide\n\t\tawait new Promise( requestAnimationFrame );\n\t\tthis.Reveal.layoutSlideContents( slideWidth, slideHeight );\n\n\t\t// Batch scrollHeight access to prevent layout thrashing\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tconst slideScrollHeights = slides.map( slide => slide.scrollHeight );\n\n\t\tconst pages = [];\n\t\tconst pageContainer = slides[0].parentNode;\n\t\tlet slideNumber = 1;\n\n\t\t// Slide and slide background layout\n\t\tslides.forEach( function( slide, index ) {\n\n\t\t\t// Vertical stacks are not centred since their section\n\t\t\t// children will be\n\t\t\tif( slide.classList.contains( 'stack' ) === false ) {\n\t\t\t\t// Center the slide inside of the page, giving the slide some margin\n\t\t\t\tlet left = ( pageWidth - slideWidth ) / 2;\n\t\t\t\tlet top = ( pageHeight - slideHeight ) / 2;\n\n\t\t\t\tconst contentHeight = slideScrollHeights[ index ];\n\t\t\t\tlet numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );\n\n\t\t\t\t// Adhere to configured pages per slide limit\n\t\t\t\tnumberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );\n\n\t\t\t\t// Center slides vertically\n\t\t\t\tif( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {\n\t\t\t\t\ttop = Math.max( ( pageHeight - contentHeight ) / 2, 0 );\n\t\t\t\t}\n\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpages.push( page );\n\n\t\t\t\tpage.className = 'pdf-page';\n\t\t\t\tpage.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';\n\n\t\t\t\t// Copy the presentation-wide background to each individual\n\t\t\t\t// page when printing\n\t\t\t\tif( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tpage.appendChild( slide );\n\n\t\t\t\t// Position the slide inside of the page\n\t\t\t\tslide.style.left = left + 'px';\n\t\t\t\tslide.style.top = top + 'px';\n\t\t\t\tslide.style.width = slideWidth + 'px';\n\n\t\t\t\tthis.Reveal.slideContent.layout( slide );\n\n\t\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\t\tpage.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t\t}\n\n\t\t\t\t// Inject notes if `showNotes` is enabled\n\t\t\t\tif( config.showNotes ) {\n\n\t\t\t\t\t// Are there notes for this slide?\n\t\t\t\t\tconst notes = this.Reveal.getSlideNotes( slide );\n\t\t\t\t\tif( notes ) {\n\n\t\t\t\t\t\tconst notesSpacing = 8;\n\t\t\t\t\t\tconst notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';\n\t\t\t\t\t\tconst notesElement = document.createElement( 'div' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes-pdf' );\n\t\t\t\t\t\tnotesElement.setAttribute( 'data-layout', notesLayout );\n\t\t\t\t\t\tnotesElement.innerHTML = notes;\n\n\t\t\t\t\t\tif( notesLayout === 'separate-page' ) {\n\t\t\t\t\t\t\tpages.push( notesElement );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tnotesElement.style.left = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.bottom = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';\n\t\t\t\t\t\t\tpage.appendChild( notesElement );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t// Inject page numbers if `slideNumbers` are enabled\n\t\t\t\tif( injectPageNumbers ) {\n\t\t\t\t\tconst numberElement = document.createElement( 'div' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number-pdf' );\n\t\t\t\t\tnumberElement.innerHTML = slideNumber++;\n\t\t\t\t\tpage.appendChild( numberElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy page and show fragments one after another\n\t\t\t\tif( config.pdfSeparateFragments ) {\n\n\t\t\t\t\t// Each fragment 'group' is an array containing one or more\n\t\t\t\t\t// fragments. Multiple fragments that appear at the same time\n\t\t\t\t\t// are part of the same group.\n\t\t\t\t\tconst fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );\n\n\t\t\t\t\tlet previousFragmentStep;\n\n\t\t\t\t\tfragmentGroups.forEach( function( fragments, index ) {\n\n\t\t\t\t\t\t// Remove 'current-fragment' from the previous group\n\t\t\t\t\t\tif( previousFragmentStep ) {\n\t\t\t\t\t\t\tpreviousFragmentStep.forEach( function( fragment ) {\n\t\t\t\t\t\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Show the fragments for the current index\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.add( 'visible', 'current-fragment' );\n\t\t\t\t\t\t}, this );\n\n\t\t\t\t\t\t// Create a separate page for the current fragment state\n\t\t\t\t\t\tconst clonedPage = page.cloneNode( true );\n\n\t\t\t\t\t\t// Inject unique page numbers for fragments\n\t\t\t\t\t\tif( injectPageNumbers ) {\n\t\t\t\t\t\t\tconst numberElement = clonedPage.querySelector( '.slide-number-pdf' );\n\t\t\t\t\t\t\tconst fragmentNumber = index + 1;\n\t\t\t\t\t\t\tnumberElement.innerHTML += '.' + fragmentNumber;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tpages.push( clonedPage );\n\n\t\t\t\t\t\tpreviousFragmentStep = fragments;\n\n\t\t\t\t\t}, this );\n\n\t\t\t\t\t// Reset the first/original page so that all fragments are hidden\n\t\t\t\t\tfragmentGroups.forEach( function( fragments ) {\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t\t\t\t\t} );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\t\t\t\t// Show all fragments\n\t\t\t\telse {\n\t\t\t\t\tqueryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {\n\t\t\t\t\t\tfragment.classList.add( 'visible' );\n\t\t\t\t\t} );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tpages.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Re-run JS-based content layout after the slide is added to page DOM\n\t\tthis.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );\n\n\t\t// Notify subscribers that the PDF layout is good to go\n\t\tthis.Reveal.dispatchEvent({ type: 'pdf-ready' });\n\n\t\tviewportElement.classList.remove( 'loading-scroll-mode' );\n\n\t}\n\n\t/**\n\t * Checks if the print mode is/should be activated.\n\t */\n\tisActive() {\n\n\t\treturn this.Reveal.getConfig().view === 'print';\n\n\t}\n\n}","import { extend, queryAll } from '../utils/util.js'\n\n/**\n * Handles sorting and navigation of slide fragments.\n * Fragments are elements within a slide that are\n * revealed/animated incrementally.\n */\nexport default class Fragments {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.fragments === false ) {\n\t\t\tthis.disable();\n\t\t}\n\t\telse if( oldConfig.fragments === false ) {\n\t\t\tthis.enable();\n\t\t}\n\n\t}\n\n\t/**\n\t * If fragments are disabled in the deck, they should all be\n\t * visible rather than stepped through.\n\t */\n\tdisable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.add( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Reverse of #disable(). Only called if fragments have\n\t * previously been disabled.\n\t */\n\tenable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.remove( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns an object describing the available fragment\n\t * directions.\n\t *\n\t * @return {{prev: boolean, next: boolean}}\n\t */\n\tavailableRoutes() {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\t\t\tlet fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' );\n\t\t\tlet hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' );\n\n\t\t\treturn {\n\t\t\t\tprev: fragments.length - hiddenFragments.length > 0,\n\t\t\t\tnext: !!hiddenFragments.length\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\treturn { prev: false, next: false };\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a sorted fragments list, ordered by an increasing\n\t * \"data-fragment-index\" attribute.\n\t *\n\t * Fragments will be revealed in the order that they are returned by\n\t * this function, so you can use the index attributes to control the\n\t * order of fragment appearance.\n\t *\n\t * To maintain a sensible default fragment order, fragments are presumed\n\t * to be passed in document order. This function adds a \"fragment-index\"\n\t * attribute to each node if such an attribute is not already present,\n\t * and sets that attribute to an integer value which is the position of\n\t * the fragment within the fragments list.\n\t *\n\t * @param {object[]|*} fragments\n\t * @param {boolean} grouped If true the returned array will contain\n\t * nested arrays for all fragments with the same index\n\t * @return {object[]} sorted Sorted array of fragments\n\t */\n\tsort( fragments, grouped = false ) {\n\n\t\tfragments = Array.from( fragments );\n\n\t\tlet ordered = [],\n\t\t\tunordered = [],\n\t\t\tsorted = [];\n\n\t\t// Group ordered and unordered elements\n\t\tfragments.forEach( fragment => {\n\t\t\tif( fragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\tlet index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );\n\n\t\t\t\tif( !ordered[index] ) {\n\t\t\t\t\tordered[index] = [];\n\t\t\t\t}\n\n\t\t\t\tordered[index].push( fragment );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tunordered.push( [ fragment ] );\n\t\t\t}\n\t\t} );\n\n\t\t// Append fragments without explicit indices in their\n\t\t// DOM order\n\t\tordered = ordered.concat( unordered );\n\n\t\t// Manually count the index up per group to ensure there\n\t\t// are no gaps\n\t\tlet index = 0;\n\n\t\t// Push all fragments in their sorted order to an array,\n\t\t// this flattens the groups\n\t\tordered.forEach( group => {\n\t\t\tgroup.forEach( fragment => {\n\t\t\t\tsorted.push( fragment );\n\t\t\t\tfragment.setAttribute( 'data-fragment-index', index );\n\t\t\t} );\n\n\t\t\tindex ++;\n\t\t} );\n\n\t\treturn grouped === true ? ordered : sorted;\n\n\t}\n\n\t/**\n\t * Sorts and formats all of fragments in the\n\t * presentation.\n\t */\n\tsortAll() {\n\n\t\tthis.Reveal.getHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tlet verticalSlides = queryAll( horizontalSlide, 'section' );\n\t\t\tverticalSlides.forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tthis.sort( verticalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t\t}, this );\n\n\t\t\tif( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Refreshes the fragments on the current slide so that they\n\t * have the appropriate classes (.visible + .current-fragment).\n\t *\n\t * @param {number} [index] The index of the current fragment\n\t * @param {array} [fragments] Array containing all fragments\n\t * in the current slide\n\t *\n\t * @return {{shown: array, hidden: array}}\n\t */\n\tupdate( index, fragments, slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet changedFragments = {\n\t\t\tshown: [],\n\t\t\thidden: []\n\t\t};\n\n\t\tif( slide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tfragments = fragments || this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t\t\tif( fragments.length ) {\n\n\t\t\t\tlet maxIndex = 0;\n\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet currentFragment = this.sort( slide.querySelectorAll( '.fragment.visible' ) ).pop();\n\t\t\t\t\tif( currentFragment ) {\n\t\t\t\t\t\tindex = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tArray.from( fragments ).forEach( ( el, i ) => {\n\n\t\t\t\t\tif( el.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\t\ti = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t\t}\n\n\t\t\t\t\tmaxIndex = Math.max( maxIndex, i );\n\n\t\t\t\t\t// Visible fragments\n\t\t\t\t\tif( i <= index ) {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.add( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( i === index ) {\n\t\t\t\t\t\t\t// Announce the fragments one by one to the Screen Reader\n\t\t\t\t\t\t\tthis.Reveal.announceStatus( this.Reveal.getStatusText( el ) );\n\n\t\t\t\t\t\t\tel.classList.add( 'current-fragment' );\n\t\t\t\t\t\t\tthis.Reveal.slideContent.startEmbeddedContent( el );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif( !wasVisible ) {\n\t\t\t\t\t\t\tchangedFragments.shown.push( el )\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'visible',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// Hidden fragments\n\t\t\t\t\telse {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.remove( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( wasVisible ) {\n\t\t\t\t\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( el );\n\t\t\t\t\t\t\tchangedFragments.hidden.push( el );\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'hidden',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\t// Write the current fragment index to the slide .\n\t\t\t\t// This can be used by end users to apply styles based on\n\t\t\t\t// the current fragment index.\n\t\t\t\tindex = typeof index === 'number' ? index : -1;\n\t\t\t\tindex = Math.max( Math.min( index, maxIndex ), -1 );\n\t\t\t\tslide.setAttribute( 'data-fragment', index );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif( changedFragments.hidden.length ) {\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'fragmenthidden',\n\t\t\t\tdata: {\n\t\t\t\t\tfragment: changedFragments.hidden[0],\n\t\t\t\t\tfragments: changedFragments.hidden\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\n\t\tif( changedFragments.shown.length ) {\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'fragmentshown',\n\t\t\t\tdata: {\n\t\t\t\t\tfragment: changedFragments.shown[0],\n\t\t\t\t\tfragments: changedFragments.shown\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\n\t\treturn changedFragments;\n\n\t}\n\n\t/**\n\t * Formats the fragments on the given slide so that they have\n\t * valid indices. Call this if fragments are changed in the DOM\n\t * after reveal.js has already initialized.\n\t *\n\t * @param {HTMLElement} slide\n\t * @return {Array} a list of the HTML fragments that were synced\n\t */\n\tsync( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\treturn this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t}\n\n\t/**\n\t * Navigate to the specified slide fragment.\n\t *\n\t * @param {?number} index The index of the fragment that\n\t * should be shown, -1 means all are invisible\n\t * @param {number} offset Integer offset to apply to the\n\t * fragment index\n\t *\n\t * @return {boolean} true if a change was made in any\n\t * fragments visibility as part of this call\n\t */\n\tgoto( index, offset = 0 ) {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tlet fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tif( fragments.length ) {\n\n\t\t\t\t// If no index is specified, find the current\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop();\n\n\t\t\t\t\tif( lastVisibleFragment ) {\n\t\t\t\t\t\tindex = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tindex = -1;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Apply the offset if there is one\n\t\t\t\tindex += offset;\n\n\t\t\t\tlet changedFragments = this.update( index, fragments );\n\n\t\t\t\tthis.Reveal.controls.update();\n\t\t\t\tthis.Reveal.progress.update();\n\n\t\t\t\tif( this.Reveal.getConfig().fragmentInURL ) {\n\t\t\t\t\tthis.Reveal.location.writeURL();\n\t\t\t\t}\n\n\t\t\t\treturn !!( changedFragments.shown.length || changedFragments.hidden.length );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Navigate to the next slide fragment.\n\t *\n\t * @return {boolean} true if there was a next fragment,\n\t * false otherwise\n\t */\n\tnext() {\n\n\t\treturn this.goto( null, 1 );\n\n\t}\n\n\t/**\n\t * Navigate to the previous slide fragment.\n\t *\n\t * @return {boolean} true if there was a previous fragment,\n\t * false otherwise\n\t */\n\tprev() {\n\n\t\treturn this.goto( null, -1 );\n\n\t}\n\n}","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { extend, queryAll, transformElement } from '../utils/util.js'\n\n/**\n * Handles all logic related to the overview mode\n * (birds-eye view of all slides).\n */\nexport default class Overview {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\n\t\tthis.onSlideClicked = this.onSlideClicked.bind( this );\n\n\t}\n\n\t/**\n\t * Displays the overview of slides (quick nav) by scaling\n\t * down and arranging all slide elements.\n\t */\n\tactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview && !this.Reveal.isScrollView() && !this.isActive() ) {\n\n\t\t\tthis.active = true;\n\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview' );\n\n\t\t\t// Don't auto-slide while in overview mode\n\t\t\tthis.Reveal.cancelAutoSlide();\n\n\t\t\t// Move the backgrounds element into the slide container to\n\t\t\t// that the same scaling is applied\n\t\t\tthis.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clicking on an overview slide navigates to it\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\tif( !slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tslide.addEventListener( 'click', this.onSlideClicked, true );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Calculate slide sizes\n\t\t\tconst margin = 70;\n\t\t\tconst slideSize = this.Reveal.getComputedSlideSize();\n\t\t\tthis.overviewSlideWidth = slideSize.width + margin;\n\t\t\tthis.overviewSlideHeight = slideSize.height + margin;\n\n\t\t\t// Reverse in RTL mode\n\t\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\t\tthis.overviewSlideWidth = -this.overviewSlideWidth;\n\t\t\t}\n\n\t\t\tthis.Reveal.updateSlidesVisibility();\n\n\t\t\tthis.layout();\n\t\t\tthis.update();\n\n\t\t\tthis.Reveal.layout();\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\t// Notify observers of the overview showing\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewshown',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Uses CSS transforms to position all slides in a grid for\n\t * display inside of the overview mode.\n\t */\n\tlayout() {\n\n\t\t// Layout slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => {\n\t\t\thslide.setAttribute( 'data-index-h', h );\n\t\t\ttransformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tif( hslide.classList.contains( 'stack' ) ) {\n\n\t\t\t\tqueryAll( hslide, 'section' ).forEach( ( vslide, v ) => {\n\t\t\t\t\tvslide.setAttribute( 'data-index-h', h );\n\t\t\t\t\tvslide.setAttribute( 'data-index-v', v );\n\n\t\t\t\t\ttransformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t\t} );\n\n\t\t\t}\n\t\t} );\n\n\t\t// Layout slide backgrounds\n\t\tArray.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => {\n\t\t\ttransformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tqueryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => {\n\t\t\t\ttransformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Moves the overview viewport to the current slides.\n\t * Called each time the current slide changes.\n\t */\n\tupdate() {\n\n\t\tconst vmin = Math.min( window.innerWidth, window.innerHeight );\n\t\tconst scale = Math.max( vmin / 5, 150 ) / vmin;\n\t\tconst indices = this.Reveal.getIndices();\n\n\t\tthis.Reveal.transformSlides( {\n\t\t\toverview: [\n\t\t\t\t'scale('+ scale +')',\n\t\t\t\t'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)',\n\t\t\t\t'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)'\n\t\t\t].join( ' ' )\n\t\t} );\n\n\t}\n\n\t/**\n\t * Exits the slide overview and enters the currently\n\t * active slide.\n\t */\n\tdeactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview ) {\n\n\t\t\tthis.active = false;\n\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview' );\n\n\t\t\t// Temporarily add a class so that transitions can do different things\n\t\t\t// depending on whether they are exiting/entering overview, or just\n\t\t\t// moving from slide to slide\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview-deactivating' );\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview-deactivating' );\n\t\t\t}, 1 );\n\n\t\t\t// Move the background element back out\n\t\t\tthis.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clean up changes made to slides\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\ttransformElement( slide, '' );\n\n\t\t\t\tslide.removeEventListener( 'click', this.onSlideClicked, true );\n\t\t\t} );\n\n\t\t\t// Clean up changes made to backgrounds\n\t\t\tqueryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => {\n\t\t\t\ttransformElement( background, '' );\n\t\t\t} );\n\n\t\t\tthis.Reveal.transformSlides( { overview: '' } );\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\tthis.Reveal.slide( indices.h, indices.v );\n\t\t\tthis.Reveal.layout();\n\t\t\tthis.Reveal.cueAutoSlide();\n\n\t\t\t// Notify observers of the overview hiding\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewhidden',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\t}\n\n\t/**\n\t * Toggles the slide overview mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * overview is open, false means it's closed.\n\t */\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the overview is currently active.\n\t *\n\t * @return {Boolean} true if the overview is active,\n\t * false otherwise\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Invoked when a slide is and we're in the overview.\n\t *\n\t * @param {object} event\n\t */\n\tonSlideClicked( event ) {\n\n\t\tif( this.isActive() ) {\n\t\t\tevent.preventDefault();\n\n\t\t\tlet element = event.target;\n\n\t\t\twhile( element && !element.nodeName.match( /section/gi ) ) {\n\t\t\t\telement = element.parentNode;\n\t\t\t}\n\n\t\t\tif( element && !element.classList.contains( 'disabled' ) ) {\n\n\t\t\t\tthis.deactivate();\n\n\t\t\t\tif( element.nodeName.match( /section/gi ) ) {\n\t\t\t\t\tlet h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),\n\t\t\t\t\t\tv = parseInt( element.getAttribute( 'data-index-v' ), 10 );\n\n\t\t\t\t\tthis.Reveal.slide( h, v );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n}","import { enterFullscreen } from '../utils/util.js'\n\n/**\n * Handles all reveal.js keyboard interactions.\n */\nexport default class Keyboard {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// A key:value map of keyboard keys and descriptions of\n\t\t// the actions they trigger\n\t\tthis.shortcuts = {};\n\n\t\t// Holds custom key code mappings\n\t\tthis.bindings = {};\n\n\t\tthis.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.navigationMode === 'linear' ) {\n\t\t\tthis.shortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide';\n\t\t\tthis.shortcuts['← , ↑ , P , H , K'] = 'Previous slide';\n\t\t}\n\t\telse {\n\t\t\tthis.shortcuts['N , SPACE'] = 'Next slide';\n\t\t\tthis.shortcuts['P , Shift SPACE'] = 'Previous slide';\n\t\t\tthis.shortcuts['← , H'] = 'Navigate left';\n\t\t\tthis.shortcuts['→ , L'] = 'Navigate right';\n\t\t\tthis.shortcuts['↑ , K'] = 'Navigate up';\n\t\t\tthis.shortcuts['↓ , J'] = 'Navigate down';\n\t\t}\n\n\t\tthis.shortcuts['Alt + ←/↑/→/↓'] = 'Navigate without fragments';\n\t\tthis.shortcuts['Shift + ←/↑/→/↓'] = 'Jump to first/last slide';\n\t\tthis.shortcuts['B , .'] = 'Pause';\n\t\tthis.shortcuts['F'] = 'Fullscreen';\n\t\tthis.shortcuts['G'] = 'Jump to slide';\n\t\tthis.shortcuts['ESC, O'] = 'Slide overview';\n\n\t}\n\n\t/**\n\t * Starts listening for keyboard events.\n\t */\n\tbind() {\n\n\t\tdocument.addEventListener( 'keydown', this.onDocumentKeyDown, false );\n\n\t}\n\n\t/**\n\t * Stops listening for keyboard events.\n\t */\n\tunbind() {\n\n\t\tdocument.removeEventListener( 'keydown', this.onDocumentKeyDown, false );\n\n\t}\n\n\t/**\n\t * Add a custom key binding with optional description to\n\t * be added to the help screen.\n\t */\n\taddKeyBinding( binding, callback ) {\n\n\t\tif( typeof binding === 'object' && binding.keyCode ) {\n\t\t\tthis.bindings[binding.keyCode] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: binding.key,\n\t\t\t\tdescription: binding.description\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\tthis.bindings[binding] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: null,\n\t\t\t\tdescription: null\n\t\t\t};\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes the specified custom key binding.\n\t */\n\tremoveKeyBinding( keyCode ) {\n\n\t\tdelete this.bindings[keyCode];\n\n\t}\n\n\t/**\n\t * Programmatically triggers a keyboard event\n\t *\n\t * @param {int} keyCode\n\t */\n\ttriggerKey( keyCode ) {\n\n\t\tthis.onDocumentKeyDown( { keyCode } );\n\n\t}\n\n\t/**\n\t * Registers a new shortcut to include in the help overlay\n\t *\n\t * @param {String} key\n\t * @param {String} value\n\t */\n\tregisterKeyboardShortcut( key, value ) {\n\n\t\tthis.shortcuts[key] = value;\n\n\t}\n\n\tgetShortcuts() {\n\n\t\treturn this.shortcuts;\n\n\t}\n\n\tgetBindings() {\n\n\t\treturn this.bindings;\n\n\t}\n\n\t/**\n\t * Handler for the document level 'keydown' event.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentKeyDown( event ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// If there's a condition specified and it returns false,\n\t\t// ignore this event\n\t\tif( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// If keyboardCondition is set, only capture keyboard events\n\t\t// for embedded decks when they are focused\n\t\tif( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Shorthand\n\t\tlet keyCode = event.keyCode;\n\n\t\t// Remember if auto-sliding was paused so we can toggle it\n\t\tlet autoSlideWasPaused = !this.Reveal.isAutoSliding();\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\t// Is there a focused element that could be using the keyboard?\n\t\tlet activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;\n\t\tlet activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );\n\t\tlet activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);\n\n\t\t// Whitelist certain modifiers for slide navigation shortcuts\n\t\tlet keyCodeUsesModifier = [32, 37, 38, 39, 40, 63, 78, 80, 191].indexOf( event.keyCode ) !== -1;\n\n\t\t// Prevent all other events when a modifier is pressed\n\t\tlet unusedModifier = \t!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&\n\t\t\t\t\t\t\t\t( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );\n\n\t\t// Disregard the event if there's a focused element or a\n\t\t// keyboard modifier key is present\n\t\tif( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;\n\n\t\t// While paused only allow resume keyboard events; 'b', 'v', '.'\n\t\tlet resumeKeyCodes = [66,86,190,191,112];\n\t\tlet key;\n\n\t\t// Custom key bindings for togglePause should be able to resume\n\t\tif( typeof config.keyboard === 'object' ) {\n\t\t\tfor( key in config.keyboard ) {\n\t\t\t\tif( config.keyboard[key] === 'togglePause' ) {\n\t\t\t\t\tresumeKeyCodes.push( parseInt( key, 10 ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( this.Reveal.isOverlayOpen() && ![\"Escape\", \"f\", \"c\", \"b\", \".\"].includes(event.key) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Use linear navigation if we're configured to OR if\n\t\t// the presentation is one-dimensional\n\t\tlet useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides();\n\n\t\tlet triggered = false;\n\n\t\t// 1. User defined key bindings\n\t\tif( typeof config.keyboard === 'object' ) {\n\n\t\t\tfor( key in config.keyboard ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet value = config.keyboard[ key ];\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof value === 'function' ) {\n\t\t\t\t\t\tvalue.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof value === 'string' && typeof this.Reveal[ value ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ value ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// 2. Registered custom key bindings\n\t\tif( triggered === false ) {\n\n\t\t\tfor( key in this.bindings ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet action = this.bindings[ key ].callback;\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof action === 'function' ) {\n\t\t\t\t\t\taction.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ action ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// 3. System defined key bindings\n\t\tif( triggered === false ) {\n\n\t\t\t// Assume true and try to prove false\n\t\t\ttriggered = true;\n\n\t\t\t// P, PAGE UP\n\t\t\tif( keyCode === 80 || keyCode === 33 ) {\n\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// N, PAGE DOWN\n\t\t\telse if( keyCode === 78 || keyCode === 34 ) {\n\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// H, LEFT\n\t\t\telse if( keyCode === 72 || keyCode === 37 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.left({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// L, RIGHT\n\t\t\telse if( keyCode === 76 || keyCode === 39 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.right({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// K, UP\n\t\t\telse if( keyCode === 75 || keyCode === 38 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.up({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// J, DOWN\n\t\t\telse if( keyCode === 74 || keyCode === 40 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, Number.MAX_VALUE );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.down({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// HOME\n\t\t\telse if( keyCode === 36 ) {\n\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t}\n\t\t\t// END\n\t\t\telse if( keyCode === 35 ) {\n\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t}\n\t\t\t// SPACE\n\t\t\telse if( keyCode === 32 ) {\n\t\t\t\tif( this.Reveal.overview.isActive() ) {\n\t\t\t\t\tthis.Reveal.overview.deactivate();\n\t\t\t\t}\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS \"BLACK SCREEN\" BUTTON\n\t\t\telse if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {\n\t\t\t\tthis.Reveal.togglePause();\n\t\t\t}\n\t\t\t// F\n\t\t\telse if( keyCode === 70 ) {\n\t\t\t\tenterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement );\n\t\t\t}\n\t\t\t// A\n\t\t\telse if( keyCode === 65 ) {\n\t\t\t\tif( config.autoSlideStoppable ) {\n\t\t\t\t\tthis.Reveal.toggleAutoSlide( autoSlideWasPaused );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// G\n\t\t\telse if( keyCode === 71 ) {\n\t\t\t\tif( config.jumpToSlide ) {\n\t\t\t\t\tthis.Reveal.toggleJumpToSlide();\n\t\t\t\t}\n\t\t\t}\n\t\t\t// C\n\t\t\telse if( keyCode === 67 && this.Reveal.isOverlayOpen() ) {\n\t\t\t\tthis.Reveal.closeOverlay();\n\t\t\t}\n\t\t\t// ?\n\t\t\telse if( ( keyCode === 63 || keyCode === 191 ) && event.shiftKey ) {\n\t\t\t\tthis.Reveal.toggleHelp();\n\t\t\t}\n\t\t\t// F1\n\t\t\telse if( keyCode === 112 ) {\n\t\t\t\tthis.Reveal.toggleHelp();\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttriggered = false;\n\t\t\t}\n\n\t\t}\n\n\t\t// If the input resulted in a triggered action we should prevent\n\t\t// the browsers default behavior\n\t\tif( triggered ) {\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\t\t// ESC or O key\n\t\telse if( keyCode === 27 || keyCode === 79 ) {\n\t\t\tif( this.Reveal.closeOverlay() === false ) {\n\t\t\t\tthis.Reveal.overview.toggle();\n\t\t\t}\n\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\t\t\n\t\t// Enter to exit overview mode\n\t\telse if (keyCode === 13 && this.Reveal.overview.isActive()) {\n\t\t\tthis.Reveal.overview.deactivate();\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\n\t\t// If auto-sliding is enabled we need to cue up\n\t\t// another timeout\n\t\tthis.Reveal.cueAutoSlide();\n\n\t}\n\n}\n","/**\n * Reads and writes the URL based on reveal.js' current state.\n */\nexport default class Location {\n\n\t// The minimum number of milliseconds that must pass between\n\t// calls to history.replaceState\n\tMAX_REPLACE_STATE_FREQUENCY = 1000\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Delays updates to the URL due to a Chrome thumbnailer bug\n\t\tthis.writeURLTimeout = 0;\n\n\t\tthis.replaceStateTimestamp = 0;\n\n\t\tthis.onWindowHashChange = this.onWindowHashChange.bind( this );\n\n\t}\n\n\tbind() {\n\n\t\twindow.addEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\tunbind() {\n\n\t\twindow.removeEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\t/**\n\t * Returns the slide indices for the given hash link.\n\t *\n\t * @param {string} [hash] the hash string that we want to\n\t * find the indices for\n\t *\n\t * @returns slide indices or null\n\t */\n\tgetIndicesFromHash( hash=window.location.hash, options={} ) {\n\n\t\t// Attempt to parse the hash as either an index or name\n\t\tlet name = hash.replace( /^#\\/?/, '' );\n\t\tlet bits = name.split( '/' );\n\n\t\t// If the first bit is not fully numeric and there is a name we\n\t\t// can assume that this is a named link\n\t\tif( !/^[0-9]*$/.test( bits[0] ) && name.length ) {\n\t\t\tlet slide;\n\n\t\t\tlet f;\n\n\t\t\t// Parse named links with fragments (#/named-link/2)\n\t\t\tif( /\\/[-\\d]+$/g.test( name ) ) {\n\t\t\t\tf = parseInt( name.split( '/' ).pop(), 10 );\n\t\t\t\tf = isNaN(f) ? undefined : f;\n\t\t\t\tname = name.split( '/' ).shift();\n\t\t\t}\n\n\t\t\t// Ensure the named link is a valid HTML ID attribute\n\t\t\ttry {\n\t\t\t\tslide = document\n\t\t\t\t\t.getElementById( decodeURIComponent( name ) )\n\t\t\t\t\t.closest('.slides section');\n\t\t\t}\n\t\t\tcatch ( error ) { }\n\n\t\t\tif( slide ) {\n\t\t\t\treturn { ...this.Reveal.getIndices( slide ), f };\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconst config = this.Reveal.getConfig();\n\t\t\tlet hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;\n\n\t\t\t// Read the index components of the hash\n\t\t\tlet h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tv = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tf;\n\n\t\t\tif( config.fragmentInURL ) {\n\t\t\t\tf = parseInt( bits[2], 10 );\n\t\t\t\tif( isNaN( f ) ) {\n\t\t\t\t\tf = undefined;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn { h, v, f };\n\t\t}\n\n\t\t// The hash couldn't be parsed or no matching named link was found\n\t\treturn null\n\n\t}\n\n\t/**\n\t * Reads the current URL (hash) and navigates accordingly.\n\t */\n\treadURL() {\n\n\t\tconst currentIndices = this.Reveal.getIndices();\n\t\tconst newIndices = this.getIndicesFromHash();\n\n\t\tif( newIndices ) {\n\t\t\tif( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) {\n\t\t\t\t\tthis.Reveal.slide( newIndices.h, newIndices.v, newIndices.f );\n\t\t\t}\n\t\t}\n\t\t// If no new indices are available, we're trying to navigate to\n\t\t// a slide hash that does not exist\n\t\telse {\n\t\t\tthis.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the page URL (hash) to reflect the current\n\t * state.\n\t *\n\t * @param {number} delay The time in ms to wait before\n\t * writing the hash\n\t */\n\twriteURL( delay ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\n\t\t// Make sure there's never more than one timeout running\n\t\tclearTimeout( this.writeURLTimeout );\n\n\t\t// If a delay is specified, timeout this call\n\t\tif( typeof delay === 'number' ) {\n\t\t\tthis.writeURLTimeout = setTimeout( this.writeURL, delay );\n\t\t}\n\t\telse if( currentSlide ) {\n\n\t\t\tlet hash = this.getHash();\n\n\t\t\t// If we're configured to push to history OR the history\n\t\t\t// API is not available.\n\t\t\tif( config.history ) {\n\t\t\t\twindow.location.hash = hash;\n\t\t\t}\n\t\t\t// If we're configured to reflect the current slide in the\n\t\t\t// URL without pushing to history.\n\t\t\telse if( config.hash ) {\n\t\t\t\t// If the hash is empty, don't add it to the URL\n\t\t\t\tif( hash === '/' ) {\n\t\t\t\t\tthis.debouncedReplaceState( window.location.pathname + window.location.search );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.debouncedReplaceState( '#' + hash );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// UPDATE: The below nuking of all hash changes breaks\n\t\t\t// anchors on pages where reveal.js is running. Removed\n\t\t\t// in 4.0. Why was it here in the first place? ¯\\_(ツ)_/¯\n\t\t\t//\n\t\t\t// If history and hash are both disabled, a hash may still\n\t\t\t// be added to the URL by clicking on a href with a hash\n\t\t\t// target. Counter this by always removing the hash.\n\t\t\t// else {\n\t\t\t// \twindow.history.replaceState( null, null, window.location.pathname + window.location.search );\n\t\t\t// }\n\n\t\t}\n\n\t}\n\n\treplaceState( url ) {\n\n\t\twindow.history.replaceState( null, null, url );\n\t\tthis.replaceStateTimestamp = Date.now();\n\n\t}\n\n\tdebouncedReplaceState( url ) {\n\n\t\tclearTimeout( this.replaceStateTimeout );\n\n\t\tif( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) {\n\t\t\tthis.replaceState( url );\n\t\t}\n\t\telse {\n\t\t\tthis.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY );\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a hash URL that will resolve to the given slide location.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to link to\n\t */\n\tgetHash( slide ) {\n\n\t\tlet url = '/';\n\n\t\t// Attempt to create a named link based on the slide's ID\n\t\tlet s = slide || this.Reveal.getCurrentSlide();\n\t\tlet id = s ? s.getAttribute( 'id' ) : null;\n\t\tif( id ) {\n\t\t\tid = encodeURIComponent( id );\n\t\t}\n\n\t\tlet index = this.Reveal.getIndices( slide );\n\t\tif( !this.Reveal.getConfig().fragmentInURL ) {\n\t\t\tindex.f = undefined;\n\t\t}\n\n\t\t// If the current slide has an ID, use that as a named link,\n\t\t// but we don't support named links with a fragment index\n\t\tif( typeof id === 'string' && id.length ) {\n\t\t\turl = '/' + id;\n\n\t\t\t// If there is also a fragment, append that at the end\n\t\t\t// of the named link, like: #/named-link/2\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\t\t// Otherwise use the /h/v index\n\t\telse {\n\t\t\tlet hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0;\n\t\t\tif( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase;\n\t\t\tif( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase );\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\n\t\treturn url;\n\n\t}\n\n\t/**\n\t * Handler for the window level 'hashchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tonWindowHashChange( event ) {\n\n\t\tthis.readURL();\n\n\t}\n\n}","import { queryAll, enterFullscreen } from '../utils/util.js'\nimport { isAndroid } from '../utils/device.js'\n\n/**\n * Manages our presentation controls. This includes both\n * the built-in control arrows as well as event monitoring\n * of any elements within the presentation with either of the\n * following helper classes:\n * - .navigate-up\n * - .navigate-right\n * - .navigate-down\n * - .navigate-left\n * - .navigate-next\n * - .navigate-prev\n * - .enter-fullscreen\n */\nexport default class Controls {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this );\n\t\tthis.onNavigateRightClicked = this.onNavigateRightClicked.bind( this );\n\t\tthis.onNavigateUpClicked = this.onNavigateUpClicked.bind( this );\n\t\tthis.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );\n\t\tthis.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );\n\t\tthis.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );\n\t\tthis.onEnterFullscreen = this.onEnterFullscreen.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tconst rtl = this.Reveal.getConfig().rtl;\n\t\tconst revealElement = this.Reveal.getRevealElement();\n\n\t\tthis.element = document.createElement( 'aside' );\n\t\tthis.element.className = 'controls';\n\t\tthis.element.innerHTML =\n\t\t\t`
\n\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\tUnable to load iframe. This is likely due to the site's policy (x-frame-options). \n\t\t\t\t \n\t\t\t
`;\n\n\t\tthis.dom.querySelector( 'iframe' ).addEventListener( 'load', event => {\n\t\t\tthis.dom.dataset.state = 'loaded';\n\t\t}, false );\n\n\t\tthis.dom.querySelector( '.r-overlay-close' ).addEventListener( 'click', event => {\n\t\t\tthis.close();\n\t\t\tevent.preventDefault();\n\t\t}, false );\n\n\t\tthis.dom.querySelector( '.r-overlay-external' ).addEventListener( 'click', event => {\n\t\t\tthis.close();\n\t\t}, false );\n\n\t\tthis.Reveal.dispatchEvent({ type: 'previewiframe', data: { url } });\n\n\t}\n\n\t/**\n\t * Opens a lightbox window that provides a larger view of the\n\t * given image/video.\n\t *\n\t * @param {string} url - url to the image/video to preview\n\t * @param {image|video} mediaType\n\t * @param {string} [fitMode] - the fit mode to use for the preview\n\t */\n\tpreviewMedia( url, mediaType, fitMode ) {\n\n\t\tif( mediaType !== 'image' && mediaType !== 'video' ) {\n\t\t\tconsole.warn( 'Please specify a valid media type to preview (image|video)' );\n\t\t\treturn;\n\t\t}\n\n\t\tthis.close();\n\n\t\tfitMode = fitMode || 'scale-down';\n\n\t\tthis.createOverlay( 'r-overlay-preview' );\n\t\tthis.dom.dataset.state = 'loading';\n\t\tthis.dom.dataset.previewFit = fitMode;\n\n\t\tthis.viewport.innerHTML =\n\t\t\t`\n\t\t\t
\n\t\t\t
`;\n\n\t\tconst contentElement = this.dom.querySelector( '.r-overlay-content' );\n\n\t\tif( mediaType === 'image' ) {\n\n\t\t\tthis.state = { previewImage: url, previewFit: fitMode }\n\n\t\t\tconst img = document.createElement( 'img', {} );\n\t\t\timg.src = url;\n\t\t\tcontentElement.appendChild( img );\n\n\t\t\timg.addEventListener( 'load', () => {\n\t\t\t\tthis.dom.dataset.state = 'loaded';\n\t\t\t}, false );\n\n\t\t\timg.addEventListener( 'error', () => {\n\t\t\t\tthis.dom.dataset.state = 'error';\n\t\t\t\tcontentElement.innerHTML =\n\t\t\t\t\t\t`Unable to load image. `\n\t\t\t}, false );\n\n\t\t\t// Hide image overlays when clicking outside the overlay\n\t\t\tthis.dom.style.cursor = 'zoom-out';\n\t\t\tthis.dom.addEventListener( 'click', ( event ) => {\n\t\t\t\tthis.close();\n\t\t\t}, false );\n\n\t\t\tthis.Reveal.dispatchEvent({ type: 'previewimage', data: { url } });\n\n\t\t}\n\t\telse if( mediaType === 'video' ) {\n\n\t\t\tthis.state = { previewVideo: url, previewFit: fitMode }\n\n\t\t\tconst video = document.createElement( 'video' );\n\t\t\tvideo.autoplay = this.dom.dataset.previewAutoplay === 'false' ? false : true;\n\t\t\tvideo.controls = this.dom.dataset.previewControls === 'false' ? false : true;\n\t\t\tvideo.loop = this.dom.dataset.previewLoop === 'true' ? true : false;\n\t\t\tvideo.muted = this.dom.dataset.previewMuted === 'true' ? true : false;\n\t\t\tvideo.playsInline = true;\n\t\t\tvideo.src = url;\n\t\t\tcontentElement.appendChild( video );\n\n\t\t\tvideo.addEventListener( 'loadeddata', () => {\n\t\t\t\tthis.dom.dataset.state = 'loaded';\n\t\t\t}, false );\n\n\t\t\tvideo.addEventListener( 'error', () => {\n\t\t\t\tthis.dom.dataset.state = 'error';\n\t\t\t\tcontentElement.innerHTML =\n\t\t\t\t\t`Unable to load video. `;\n\t\t\t}, false );\n\n\t\t\tthis.Reveal.dispatchEvent({ type: 'previewvideo', data: { url } });\n\n\t\t}\n\t\telse {\n\t\t\tthrow new Error( 'Please specify a valid media type to preview' );\n\t\t}\n\n\t\tthis.dom.querySelector( '.r-overlay-close' ).addEventListener( 'click', ( event ) => {\n\t\t\tthis.close();\n\t\t\tevent.preventDefault();\n\t\t}, false );\n\n\t}\n\n\tpreviewImage( url, fitMode ) {\n\n\t\tthis.previewMedia( url, 'image', fitMode );\n\n\t}\n\n\tpreviewVideo( url, fitMode ) {\n\n\t\tthis.previewMedia( url, 'video', fitMode );\n\n\t}\n\n\t/**\n\t * Open or close help overlay window.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * help is open, false means it's closed.\n\t */\n\ttoggleHelp( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.showHelp() : this.close();\n\t\t}\n\t\telse {\n\t\t\tif( this.dom ) {\n\t\t\t\tthis.close();\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.showHelp();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Opens an overlay window with help material.\n\t */\n\tshowHelp() {\n\n\t\tif( this.Reveal.getConfig().help ) {\n\n\t\t\tthis.close();\n\n\t\t\tthis.createOverlay( 'r-overlay-help' );\n\n\t\t\tlet html = 'Keyboard Shortcuts
';\n\n\t\t\tlet shortcuts = this.Reveal.keyboard.getShortcuts(),\n\t\t\t\tbindings = this.Reveal.keyboard.getBindings();\n\n\t\t\thtml += 'KEY ACTION ';\n\t\t\tfor( let key in shortcuts ) {\n\t\t\t\thtml += `${key} ${shortcuts[ key ]} ${bindings[binding].key} ${bindings[binding].description}
';\n\n\t\t\tthis.viewport.innerHTML = `\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t
${html}
\n\t\t\t\t
No notes on this slide. ';\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the visibility of the speaker notes sidebar that\n\t * is used to share annotated slides. The notes sidebar is\n\t * only visible if showNotes is true and there are notes on\n\t * one or more slides in the deck.\n\t */\n\tupdateVisibility() {\n\n\t\tif( this.Reveal.getConfig().showNotes &&\n\t\t\tthis.hasNotes() &&\n\t\t\t!this.Reveal.isScrollView() &&\n\t\t\t!this.Reveal.isPrintView()\n\t\t) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'show-notes' );\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'show-notes' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if there are speaker notes for ANY slide in the\n\t * presentation.\n\t */\n\thasNotes() {\n\n\t\treturn this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0;\n\n\t}\n\n\t/**\n\t * Checks if this presentation is running inside of the\n\t * speaker notes window.\n\t *\n\t * @return {boolean}\n\t */\n\tisSpeakerNotesWindow() {\n\n\t\treturn !!window.location.search.match( /receiver/gi );\n\n\t}\n\n\t/**\n\t * Retrieves the speaker notes from a slide. Notes can be\n\t * defined in two ways:\n\t * 1. As a data-notes attribute on the slide \n\t * 2. With elements inside the slide\n\t *\n\t * @param {HTMLElement} [slide=currentSlide]\n\t * @return {(string|null)}\n\t */\n\tgetSlideNotes( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\t// Notes can be specified via the data-notes attribute...\n\t\tif( slide.hasAttribute( 'data-notes' ) ) {\n\t\t\treturn slide.getAttribute( 'data-notes' );\n\t\t}\n\n\t\t// ... or using