lib/resources/assets/revealjs-redhat/lib/js/debug/reveal.js in hyla-1.0.7.pre.5 vs lib/resources/assets/revealjs-redhat/lib/js/debug/reveal.js in hyla-1.0.7.pre.6

- old
+ new

@@ -1,1280 +1,4461 @@ -!function (e, t) { - "function" == typeof define && define.amd ? define(function () { - return e.Reveal = t(), e.Reveal - }) : "object" == typeof exports ? module.exports = t() : e.Reveal = t() -}(this, function () { - "use strict"; - function e(e) { - if (t(), Pr.transforms2d || Pr.transforms3d) { - Cr.wrapper = document.querySelector(".reveal"), Cr.slides = document.querySelector(".reveal .slides"), window.addEventListener("load", W, !1); - var n = vr.getQueryHash(); - "undefined" != typeof n.dependencies && delete n.dependencies, h(xr, e), h(xr, n), q(), r() - } else { - document.body.setAttribute("class", "no-transforms"); - for (var a = document.getElementsByTagName("img"), i = 0, o = a.length; o > i; i++) { - var s = a[i]; - s.getAttribute("data-src") && (s.setAttribute("src", s.getAttribute("data-src")), s.removeAttribute("data-src")) +/*! + * reveal.js + * http://lab.hakim.se/reveal-js + * MIT licensed + * + * Copyright (C) 2015 Hakim El Hattab, http://hakim.se + */ +(function( root, factory ) { + if( typeof define === 'function' && define.amd ) { + // AMD. Register as an anonymous module. + define( function() { + root.Reveal = factory(); + return root.Reveal; + } ); + } else if( typeof exports === 'object' ) { + // Node. Does not work with strict CommonJS. + module.exports = factory(); + } else { + // Browser globals. + root.Reveal = factory(); + } +}( this, function() { + + 'use strict'; + + var Reveal; + + var SLIDES_SELECTOR = '.slides section', + HORIZONTAL_SLIDES_SELECTOR = '.slides>section', + VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section', + HOME_SLIDE_SELECTOR = '.slides>section:first-of-type', + + // Configurations defaults, can be overridden at initialization time + config = { + + // The "normal" size of the presentation, aspect ratio will be preserved + // when the presentation is scaled to fit different resolutions + width: 960, + height: 700, + + // Factor of the display size that should remain empty around the content + margin: 0.1, + + // Bounds for smallest/largest possible scale to apply to content + minScale: 0.2, + maxScale: 1.5, + + // Display controls in the bottom right corner + controls: true, + + // Display a presentation progress bar + progress: true, + + // Display the page number of the current slide + slideNumber: false, + + // Push each slide change to the browser history + history: false, + + // Enable keyboard shortcuts for navigation + keyboard: true, + + // Optional function that blocks keyboard events when retuning false + keyboardCondition: null, + + // Enable the slide overview mode + overview: true, + + // Vertical centering of slides + center: true, + + // Enables touch navigation on devices with touch input + touch: true, + + // Loop the presentation + loop: false, + + // Change the presentation direction to be RTL + rtl: false, + + // Turns fragments on and off globally + fragments: true, + + // Flags if the presentation is running in an embedded mode, + // i.e. contained within a limited portion of the screen + embedded: false, + + // Flags if we should show a help overlay when the questionmark + // key is pressed + help: true, + + // Flags if it should be possible to pause the presentation (blackout) + pause: true, + + // Number of milliseconds between automatically proceeding to the + // next slide, disabled when set to 0, this value can be overwritten + // by using a data-autoslide attribute on your slides + autoSlide: 0, + + // Stop auto-sliding after user input + autoSlideStoppable: true, + + // Enable slide navigation via mouse wheel + mouseWheel: false, + + // Apply a 3D roll to links on hover + rollingLinks: false, + + // Hides the address bar on mobile devices + hideAddressBar: true, + + // Opens links in an iframe preview overlay + previewLinks: false, + + // Exposes the reveal.js API through window.postMessage + postMessage: true, + + // Dispatches all reveal.js events to the parent window through postMessage + postMessageEvents: false, + + // Focuses body when page changes visiblity to ensure keyboard shortcuts work + focusBodyOnPageVisibilityChange: true, + + // Transition style + transition: 'slide', // none/fade/slide/convex/concave/zoom + + // Transition speed + transitionSpeed: 'default', // default/fast/slow + + // Transition style for full page slide backgrounds + backgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom + + // Parallax background image + parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg" + + // Parallax background size + parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px" + + // Amount of pixels to move the parallax background per slide step + parallaxBackgroundHorizontal: null, + parallaxBackgroundVertical: null, + + // Number of slides away from the current that are visible + viewDistance: 3, + + // Script dependencies to load + dependencies: [] + + }, + + // Flags if reveal.js is loaded (has dispatched the 'ready' event) + loaded = false, + + // Flags if the overview mode is currently active + overview = false, + + // The horizontal and vertical index of the currently active slide + indexh, + indexv, + + // The previous and current slide HTML elements + previousSlide, + currentSlide, + + previousBackground, + + // Slides may hold a data-state attribute which we pick up and apply + // as a class to the body. This list contains the combined state of + // all current slides. + state = [], + + // The current scale of the presentation (see width/height config) + scale = 1, + + // CSS transform that is currently applied to the slides container, + // split into two groups + slidesTransform = { layout: '', overview: '' }, + + // Cached references to DOM elements + dom = {}, + + // Features supported by the browser, see #checkCapabilities() + features = {}, + + // Client is a mobile device, see #checkCapabilities() + isMobileDevice, + + // Throttles mouse wheel navigation + lastMouseWheelStep = 0, + + // Delays updates to the URL due to a Chrome thumbnailer bug + writeURLTimeout = 0, + + // Flags if the interaction event listeners are bound + eventsAreBound = false, + + // The current auto-slide duration + autoSlide = 0, + + // Auto slide properties + autoSlidePlayer, + autoSlideTimeout = 0, + autoSlideStartTime = -1, + autoSlidePaused = false, + + // Holds information about the currently ongoing touch input + touch = { + startX: 0, + startY: 0, + startSpan: 0, + startCount: 0, + captured: false, + threshold: 40 + }, + + // Holds information about the keyboard shortcuts + keyboardShortcuts = { + 'N , SPACE': 'Next slide', + 'P': 'Previous slide', + '&#8592; , H': 'Navigate left', + '&#8594; , L': 'Navigate right', + '&#8593; , K': 'Navigate up', + '&#8595; , J': 'Navigate down', + 'Home': 'First slide', + 'End': 'Last slide', + 'B , .': 'Pause', + 'F': 'Fullscreen', + 'ESC, O': 'Slide overview' + }; + + /** + * Starts up the presentation if the client is capable. + */ + function initialize( options ) { + + checkCapabilities(); + + if( !features.transforms2d && !features.transforms3d ) { + document.body.setAttribute( 'class', 'no-transforms' ); + + // Since JS won't be running any further, we need to load all + // images that were intended to lazy load now + var images = document.getElementsByTagName( 'img' ); + for( var i = 0, len = images.length; i < len; i++ ) { + var image = images[i]; + if( image.getAttribute( 'data-src' ) ) { + image.setAttribute( 'src', image.getAttribute( 'data-src' ) ); + image.removeAttribute( 'data-src' ); + } } + + // If the browser doesn't support core features we won't be + // using JavaScript to control the presentation + return; } + + // Cache references to key DOM elements + dom.wrapper = document.querySelector( '.reveal' ); + dom.slides = document.querySelector( '.reveal .slides' ); + + // Force a layout when the whole page, incl fonts, has loaded + window.addEventListener( 'load', layout, false ); + + var query = Reveal.getQueryHash(); + + // Do not accept new dependencies via query config to avoid + // the potential of malicious script injection + if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies']; + + // Copy options over to our config object + extend( config, options ); + extend( config, query ); + + // Hide the address bar in mobile browsers + hideAddressBar(); + + // Loads the dependencies and continues to #start() once done + load(); + } - function t() { - Pr.transforms3d = "WebkitPerspective"in document.body.style || "MozPerspective"in document.body.style || "msPerspective"in document.body.style || "OPerspective"in document.body.style || "perspective"in document.body.style, Pr.transforms2d = "WebkitTransform"in document.body.style || "MozTransform"in document.body.style || "msTransform"in document.body.style || "OTransform"in document.body.style || "transform"in document.body.style, Pr.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame, Pr.requestAnimationFrame = "function" == typeof Pr.requestAnimationFrameMethod, Pr.canvas = !!document.createElement("canvas").getContext, Pr.touch = !!("ontouchstart"in window), Pr.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test(navigator.userAgent), wr = /(iphone|ipod|ipad|android)/gi.test(navigator.userAgent) + /** + * Inspect the client to see what it's capable of, this + * should only happens once per runtime. + */ + function checkCapabilities() { + + features.transforms3d = 'WebkitPerspective' in document.body.style || + 'MozPerspective' in document.body.style || + 'msPerspective' in document.body.style || + 'OPerspective' in document.body.style || + 'perspective' in document.body.style; + + features.transforms2d = 'WebkitTransform' in document.body.style || + 'MozTransform' in document.body.style || + 'msTransform' in document.body.style || + 'OTransform' in document.body.style || + 'transform' in document.body.style; + + features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame; + features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function'; + + features.canvas = !!document.createElement( 'canvas' ).getContext; + + features.touch = !!( 'ontouchstart' in window ); + + // Transitions in the overview are disabled in desktop and + // mobile Safari due to lag + features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( navigator.userAgent ); + + isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( navigator.userAgent ); + } - function r() { - function e() { - a.length && head.js.apply(null, a), n() + /** + * Loads the dependencies of reveal.js. Dependencies are + * defined via the configuration option 'dependencies' + * and will be loaded prior to starting/binding reveal.js. + * Some dependencies may have an 'async' flag, if so they + * will load after reveal.js has been started up. + */ + function load() { + + var scripts = [], + scriptsAsync = [], + scriptsToPreload = 0; + + // Called once synchronous scripts finish loading + function proceed() { + if( scriptsAsync.length ) { + // Load asynchronous scripts + head.js.apply( null, scriptsAsync ); + } + + start(); } - function t(t) { - head.ready(t.src.match(/([\w\d_\-]*)\.?js$|[^\\\/]*$/i)[0], function () { - "function" == typeof t.callback && t.callback.apply(this), 0 === --i && e() - }) + function loadScript( s ) { + head.ready( s.src.match( /([\w\d_\-]*)\.?js$|[^\\\/]*$/i )[0], function() { + // Extension may contain callback functions + if( typeof s.callback === 'function' ) { + s.callback.apply( this ); + } + + if( --scriptsToPreload === 0 ) { + proceed(); + } + }); } - for (var r = [], a = [], i = 0, o = 0, s = xr.dependencies.length; s > o; o++) { - var c = xr.dependencies[o]; - (!c.condition || c.condition()) && (c.async ? a.push(c.src) : r.push(c.src), t(c)) + for( var i = 0, len = config.dependencies.length; i < len; i++ ) { + var s = config.dependencies[i]; + + // Load if there's no condition or the condition is truthy + if( !s.condition || s.condition() ) { + if( s.async ) { + scriptsAsync.push( s.src ); + } + else { + scripts.push( s.src ); + } + + loadScript( s ); + } } - r.length ? (i = r.length, head.js.apply(null, r)) : e() + + if( scripts.length ) { + scriptsToPreload = scripts.length; + + // Load synchronous scripts + head.js.apply( null, scripts ); + } + else { + proceed(); + } + } - function n() { - a(), u(), s(), at(), p(), kt(), ut(!0), setTimeout(function () { - Cr.slides.classList.remove("no-transition"), qr = !0, T("ready", {indexh: hr, indexv: gr, currentSlide: yr}) - }, 1), x() && (v(), "complete" === document.readyState ? o() : window.addEventListener("load", o)) + /** + * Starts up reveal.js by binding input events and navigating + * to the current URL deeplink if there is one. + */ + function start() { + + // Make sure we've got all the DOM elements we need + setupDOM(); + + // Listen to messages posted to this window + setupPostMessage(); + + // Prevent iframes from scrolling the slides out of view + setupIframeScrollPrevention(); + + // Resets all vertical slides so that only the first is visible + resetVerticalSlides(); + + // Updates the presentation to match the current configuration values + configure(); + + // Read the initial hash + readURL(); + + // Update all backgrounds + updateBackground( true ); + + // Notify listeners that the presentation is ready but use a 1ms + // timeout to ensure it's not fired synchronously after #initialize() + setTimeout( function() { + // Enable transitions now that we're loaded + dom.slides.classList.remove( 'no-transition' ); + + loaded = true; + + dispatchEvent( 'ready', { + 'indexh': indexh, + 'indexv': indexv, + 'currentSlide': currentSlide + } ); + }, 1 ); + + // Special setup and config is required when printing to PDF + if( isPrintingPDF() ) { + removeEventListeners(); + + // The document needs to have loaded for the PDF layout + // measurements to be accurate + if( document.readyState === 'complete' ) { + setupPDF(); + } + else { + window.addEventListener( 'load', setupPDF ); + } + } + } - function a() { - Cr.slides.classList.add("no-transition"), Cr.background = c(Cr.wrapper, "div", "backgrounds", null), Cr.progress = c(Cr.wrapper, "div", "progress", "<span></span>"), Cr.progressbar = Cr.progress.querySelector("span"), c(Cr.wrapper, "aside", "controls", '<div class="navigate-left"></div><div class="navigate-right"></div><div class="navigate-up"></div><div class="navigate-down"></div>'), Cr.slideNumber = c(Cr.wrapper, "div", "slide-number", ""), c(Cr.wrapper, "div", "pause-overlay", null), Cr.controls = document.querySelector(".reveal .controls"), Cr.theme = document.querySelector("#theme"), Cr.wrapper.setAttribute("role", "application"), Cr.controlsLeft = g(document.querySelectorAll(".navigate-left")), Cr.controlsRight = g(document.querySelectorAll(".navigate-right")), Cr.controlsUp = g(document.querySelectorAll(".navigate-up")), Cr.controlsDown = g(document.querySelectorAll(".navigate-down")), Cr.controlsPrev = g(document.querySelectorAll(".navigate-prev")), Cr.controlsNext = g(document.querySelectorAll(".navigate-next")), Cr.statusDiv = i() + /** + * Finds and stores references to DOM elements which are + * required by the presentation. If a required element is + * not found, it is created. + */ + function setupDOM() { + + // Prevent transitions while we're loading + dom.slides.classList.add( 'no-transition' ); + + // Background element + dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null ); + + // Progress bar + dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' ); + dom.progressbar = dom.progress.querySelector( 'span' ); + + // Arrow controls + createSingletonNode( dom.wrapper, 'aside', 'controls', + '<div class="navigate-left"></div>' + + '<div class="navigate-right"></div>' + + '<div class="navigate-up"></div>' + + '<div class="navigate-down"></div>' ); + + // Slide number + dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' ); + + // Overlay graphic which is displayed during the paused mode + createSingletonNode( dom.wrapper, 'div', 'pause-overlay', null ); + + // Cache references to elements + dom.controls = document.querySelector( '.reveal .controls' ); + dom.theme = document.querySelector( '#theme' ); + + dom.wrapper.setAttribute( 'role', 'application' ); + + // There can be multiple instances of controls throughout the page + dom.controlsLeft = toArray( document.querySelectorAll( '.navigate-left' ) ); + dom.controlsRight = toArray( document.querySelectorAll( '.navigate-right' ) ); + dom.controlsUp = toArray( document.querySelectorAll( '.navigate-up' ) ); + dom.controlsDown = toArray( document.querySelectorAll( '.navigate-down' ) ); + dom.controlsPrev = toArray( document.querySelectorAll( '.navigate-prev' ) ); + dom.controlsNext = toArray( document.querySelectorAll( '.navigate-next' ) ); + + dom.statusDiv = createStatusDiv(); } - function i() { - var e = document.getElementById("aria-status-div"); - return e || (e = document.createElement("div"), e.style.position = "absolute", e.style.height = "1px", e.style.width = "1px", e.style.overflow = "hidden", e.style.clip = "rect( 1px, 1px, 1px, 1px )", e.setAttribute("id", "aria-status-div"), e.setAttribute("aria-live", "polite"), e.setAttribute("aria-atomic", "true"), Cr.wrapper.appendChild(e)), e + /** + * Creates a hidden div with role aria-live to announce the + * current slide content. Hide the div off-screen to make it + * available only to Assistive Technologies. + */ + function createStatusDiv() { + + var statusDiv = document.getElementById( 'aria-status-div' ); + if( !statusDiv ) { + statusDiv = document.createElement( 'div' ); + statusDiv.style.position = 'absolute'; + statusDiv.style.height = '1px'; + statusDiv.style.width = '1px'; + statusDiv.style.overflow ='hidden'; + statusDiv.style.clip = 'rect( 1px, 1px, 1px, 1px )'; + statusDiv.setAttribute( 'id', 'aria-status-div' ); + statusDiv.setAttribute( 'aria-live', 'polite' ); + statusDiv.setAttribute( 'aria-atomic','true' ); + dom.wrapper.appendChild( statusDiv ); + } + return statusDiv; + } - function o() { - var e = z(window.innerWidth, window.innerHeight), t = Math.floor(e.width * (1 + xr.margin)), r = Math.floor(e.height * (1 + xr.margin)), n = e.width, a = e.height; - L("@page{size:" + t + "px " + r + "px; margin: 0;}"), L(".reveal section>img, .reveal section>video, .reveal section>iframe{max-width: " + n + "px; max-height:" + a + "px}"), document.body.classList.add("print-pdf"), document.body.style.width = t + "px", document.body.style.height = r + "px", g(Cr.wrapper.querySelectorAll(kr)).forEach(function (e) { - if (e.classList.contains("stack") === !1) { - var i = (t - n) / 2, o = (r - a) / 2, s = E(e), c = Math.max(Math.ceil(s / r), 1); - (1 === c && xr.center || e.classList.contains("center")) && (o = Math.max((r - s) / 2, 0)), e.style.left = i + "px", e.style.top = o + "px", e.style.width = n + "px"; - var l = e.querySelector(".slide-background"); - l && (l.style.width = t + "px", l.style.height = r * c + "px", l.style.top = -o + "px", l.style.left = -i + "px") + /** + * Configures the presentation for printing to a static + * PDF. + */ + function setupPDF() { + + var slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight ); + + // Dimensions of the PDF pages + var pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ), + pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) ); + + // Dimensions of slides within the pages + var slideWidth = slideSize.width, + slideHeight = slideSize.height; + + // Let the browser know what page size we want to print + injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0;}' ); + + // Limit the size of certain elements to the dimensions of the slide + injectStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' ); + + document.body.classList.add( 'print-pdf' ); + document.body.style.width = pageWidth + 'px'; + document.body.style.height = pageHeight + 'px'; + + // Slide and slide background layout + toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) { + + // Vertical stacks are not centred since their section + // children will be + if( slide.classList.contains( 'stack' ) === false ) { + // Center the slide inside of the page, giving the slide some margin + var left = ( pageWidth - slideWidth ) / 2, + top = ( pageHeight - slideHeight ) / 2; + + var contentHeight = getAbsoluteHeight( slide ); + var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 ); + + // Center slides vertically + if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) { + top = Math.max( ( pageHeight - contentHeight ) / 2, 0 ); + } + + // Position the slide inside of the page + slide.style.left = left + 'px'; + slide.style.top = top + 'px'; + slide.style.width = slideWidth + 'px'; + + // TODO Backgrounds need to be multiplied when the slide + // stretches over multiple pages + var background = slide.querySelector( '.slide-background' ); + if( background ) { + background.style.width = pageWidth + 'px'; + background.style.height = ( pageHeight * numberOfPages ) + 'px'; + background.style.top = -top + 'px'; + background.style.left = -left + 'px'; + } } - }), g(Cr.wrapper.querySelectorAll(kr + " .fragment")).forEach(function (e) { - e.classList.add("visible") - }) + + } ); + + // Show all fragments + toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' .fragment' ) ).forEach( function( fragment ) { + fragment.classList.add( 'visible' ); + } ); + } - function s() { - Cr.slides.querySelector("iframe") && setInterval(function () { - (0 !== Cr.wrapper.scrollTop || 0 !== Cr.wrapper.scrollLeft) && (Cr.wrapper.scrollTop = 0, Cr.wrapper.scrollLeft = 0) - }, 500) + /** + * This is an unfortunate necessity. Iframes can trigger the + * parent window to scroll, for example by focusing an input. + * This scrolling can not be prevented by hiding overflow in + * CSS so we have to resort to repeatedly checking if the + * browser has decided to offset our slides :( + */ + function setupIframeScrollPrevention() { + + if( dom.slides.querySelector( 'iframe' ) ) { + setInterval( function() { + if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) { + dom.wrapper.scrollTop = 0; + dom.wrapper.scrollLeft = 0; + } + }, 500 ); + } + } - function c(e, t, r, n) { - for (var a = e.querySelectorAll("." + r), i = 0; i < a.length; i++) { - var o = a[i]; - if (o.parentNode === e)return o + /** + * Creates an HTML element and returns a reference to it. + * If the element already exists the existing instance will + * be returned. + */ + function createSingletonNode( container, tagname, classname, innerHTML ) { + + // Find all nodes matching the description + var nodes = container.querySelectorAll( '.' + classname ); + + // Check all matches to find one which is a direct child of + // the specified container + for( var i = 0; i < nodes.length; i++ ) { + var testNode = nodes[i]; + if( testNode.parentNode === container ) { + return testNode; + } } - var s = document.createElement(t); - return s.classList.add(r), "string" == typeof n && (s.innerHTML = n), e.appendChild(s), s + + // If no node was found, create it now + var node = document.createElement( tagname ); + node.classList.add( classname ); + if( typeof innerHTML === 'string' ) { + node.innerHTML = innerHTML; + } + container.appendChild( node ); + + return node; + } - function l() { - var e = x(); - Cr.background.innerHTML = "", Cr.background.classList.add("no-transition"), g(Cr.wrapper.querySelectorAll(Ar)).forEach(function (t) { - var r; - r = e ? d(t, t) : d(t, Cr.background), g(t.querySelectorAll("section")).forEach(function (t) { - e ? d(t, t) : d(t, r), r.classList.add("stack") - }) - }), xr.parallaxBackgroundImage ? (Cr.background.style.backgroundImage = 'url("' + xr.parallaxBackgroundImage + '")', Cr.background.style.backgroundSize = xr.parallaxBackgroundSize, setTimeout(function () { - Cr.wrapper.classList.add("has-parallax-background") - }, 1)) : (Cr.background.style.backgroundImage = "", Cr.wrapper.classList.remove("has-parallax-background")) + /** + * Creates the slide background elements and appends them + * to the background container. One element is created per + * slide no matter if the given slide has visible background. + */ + function createBackgrounds() { + + var printMode = isPrintingPDF(); + + // Clear prior backgrounds + dom.background.innerHTML = ''; + dom.background.classList.add( 'no-transition' ); + + // Iterate over all horizontal slides + toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( slideh ) { + + var backgroundStack; + + if( printMode ) { + backgroundStack = createBackground( slideh, slideh ); + } + else { + backgroundStack = createBackground( slideh, dom.background ); + } + + // Iterate over all vertical slides + toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) { + + if( printMode ) { + createBackground( slidev, slidev ); + } + else { + createBackground( slidev, backgroundStack ); + } + + backgroundStack.classList.add( 'stack' ); + + } ); + + } ); + + // Add parallax background if specified + if( config.parallaxBackgroundImage ) { + + dom.background.style.backgroundImage = 'url("' + config.parallaxBackgroundImage + '")'; + dom.background.style.backgroundSize = config.parallaxBackgroundSize; + + // Make sure the below properties are set on the element - these properties are + // needed for proper transitions to be set on the element via CSS. To remove + // annoying background slide-in effect when the presentation starts, apply + // these properties after short time delay + setTimeout( function() { + dom.wrapper.classList.add( 'has-parallax-background' ); + }, 1 ); + + } + else { + + dom.background.style.backgroundImage = ''; + dom.wrapper.classList.remove( 'has-parallax-background' ); + + } + } - function d(e, t) { - var r = { - background: e.getAttribute("data-background"), - backgroundSize: e.getAttribute("data-background-size"), - backgroundImage: e.getAttribute("data-background-image"), - backgroundVideo: e.getAttribute("data-background-video"), - backgroundIframe: e.getAttribute("data-background-iframe"), - backgroundColor: e.getAttribute("data-background-color"), - backgroundRepeat: e.getAttribute("data-background-repeat"), - backgroundPosition: e.getAttribute("data-background-position"), - backgroundTransition: e.getAttribute("data-background-transition") - }, n = document.createElement("div"); - n.className = "slide-background " + e.className.replace(/present|past|future/, ""), r.background && (/^(http|file|\/\/)/gi.test(r.background) || /\.(svg|png|jpg|jpeg|gif|bmp)$/gi.test(r.background) ? e.setAttribute("data-background-image", r.background) : n.style.background = r.background), (r.background || r.backgroundColor || r.backgroundImage || r.backgroundVideo || r.backgroundIframe) && n.setAttribute("data-background-hash", r.background + r.backgroundSize + r.backgroundImage + r.backgroundVideo + r.backgroundIframe + r.backgroundColor + r.backgroundRepeat + r.backgroundPosition + r.backgroundTransition), r.backgroundSize && (n.style.backgroundSize = r.backgroundSize), r.backgroundColor && (n.style.backgroundColor = r.backgroundColor), r.backgroundRepeat && (n.style.backgroundRepeat = r.backgroundRepeat), r.backgroundPosition && (n.style.backgroundPosition = r.backgroundPosition), r.backgroundTransition && n.setAttribute("data-background-transition", r.backgroundTransition), t.appendChild(n), e.classList.remove("has-dark-background"), e.classList.remove("has-light-background"); - var a = window.getComputedStyle(n).backgroundColor; - if (a) { - var i = k(a); - i && 0 !== i.a && e.classList.add(A(a) < 128 ? "has-dark-background" : "has-light-background") + /** + * Creates a background for the given slide. + * + * @param {HTMLElement} slide + * @param {HTMLElement} container The element that the background + * should be appended to + */ + function createBackground( slide, container ) { + + var data = { + background: slide.getAttribute( 'data-background' ), + backgroundSize: slide.getAttribute( 'data-background-size' ), + backgroundImage: slide.getAttribute( 'data-background-image' ), + backgroundVideo: slide.getAttribute( 'data-background-video' ), + backgroundIframe: slide.getAttribute( 'data-background-iframe' ), + backgroundColor: slide.getAttribute( 'data-background-color' ), + backgroundRepeat: slide.getAttribute( 'data-background-repeat' ), + backgroundPosition: slide.getAttribute( 'data-background-position' ), + backgroundTransition: slide.getAttribute( 'data-background-transition' ) + }; + + var element = document.createElement( 'div' ); + + // Carry over custom classes from the slide to the background + element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' ); + + if( data.background ) { + // Auto-wrap image urls in url(...) + if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)$/gi.test( data.background ) ) { + slide.setAttribute( 'data-background-image', data.background ); + } + else { + element.style.background = data.background; + } } - return n + + // Create a hash for this combination of background settings. + // This is used to determine when two slide backgrounds are + // the same. + if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) { + element.setAttribute( 'data-background-hash', data.background + + data.backgroundSize + + data.backgroundImage + + data.backgroundVideo + + data.backgroundIframe + + data.backgroundColor + + data.backgroundRepeat + + data.backgroundPosition + + data.backgroundTransition ); + } + + // Additional and optional background properties + if( data.backgroundSize ) element.style.backgroundSize = data.backgroundSize; + if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor; + if( data.backgroundRepeat ) element.style.backgroundRepeat = data.backgroundRepeat; + if( data.backgroundPosition ) element.style.backgroundPosition = data.backgroundPosition; + if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition ); + + container.appendChild( element ); + + // If backgrounds are being recreated, clear old classes + slide.classList.remove( 'has-dark-background' ); + slide.classList.remove( 'has-light-background' ); + + // If this slide has a background color, add a class that + // signals if it is light or dark. If the slide has no background + // color, no class will be set + var computedBackgroundColor = window.getComputedStyle( element ).backgroundColor; + if( computedBackgroundColor ) { + var rgb = colorToRgb( computedBackgroundColor ); + + // Ignore fully transparent backgrounds. Some browsers return + // rgba(0,0,0,0) when reading the computed background color of + // an element with no background + if( rgb && rgb.a !== 0 ) { + if( colorBrightness( computedBackgroundColor ) < 128 ) { + slide.classList.add( 'has-dark-background' ); + } + else { + slide.classList.add( 'has-light-background' ); + } + } + } + + return element; + } - function u() { - xr.postMessage && window.addEventListener("message", function (e) { - var t = e.data; - "{" === t.charAt(0) && "}" === t.charAt(t.length - 1) && (t = JSON.parse(t), t.method && "function" == typeof vr[t.method] && vr[t.method].apply(vr, t.args)) - }, !1) + /** + * Registers a listener to postMessage events, this makes it + * possible to call all reveal.js API methods from another + * window. For example: + * + * revealWindow.postMessage( JSON.stringify({ + * method: 'slide', + * args: [ 2 ] + * }), '*' ); + */ + function setupPostMessage() { + + if( config.postMessage ) { + window.addEventListener( 'message', function ( event ) { + var data = event.data; + + // Make sure we're dealing with JSON + if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) { + data = JSON.parse( data ); + + // Check if the requested method can be found + if( data.method && typeof Reveal[data.method] === 'function' ) { + Reveal[data.method].apply( Reveal, data.args ); + } + } + }, false ); + } + } - function p(e) { - var t = Cr.wrapper.querySelectorAll(kr).length; - Cr.wrapper.classList.remove(xr.transition), "object" == typeof e && h(xr, e), Pr.transforms3d === !1 && (xr.transition = "linear"), Cr.wrapper.classList.add(xr.transition), Cr.wrapper.setAttribute("data-transition-speed", xr.transitionSpeed), Cr.wrapper.setAttribute("data-background-transition", xr.backgroundTransition), Cr.controls.style.display = xr.controls ? "block" : "none", Cr.progress.style.display = xr.progress ? "block" : "none", xr.rtl ? Cr.wrapper.classList.add("rtl") : Cr.wrapper.classList.remove("rtl"), xr.center ? Cr.wrapper.classList.add("center") : Cr.wrapper.classList.remove("center"), xr.pause === !1 && J(), xr.mouseWheel ? (document.addEventListener("DOMMouseScroll", Gt, !1), document.addEventListener("mousewheel", Gt, !1)) : (document.removeEventListener("DOMMouseScroll", Gt, !1), document.removeEventListener("mousewheel", Gt, !1)), xr.rollingLinks ? N() : I(), xr.previewLinks ? C() : (P(), C("[data-preview-link]")), Lr && (Lr.destroy(), Lr = null), t > 1 && xr.autoSlide && xr.autoSlideStoppable && Pr.canvas && Pr.requestAnimationFrame && (Lr = new fr(Cr.wrapper, function () { - return Math.min(Math.max((Date.now() - zr) / Wr, 0), 1) - }), Lr.on("click", pr), Fr = !1), xr.fragments === !1 && g(Cr.slides.querySelectorAll(".fragment")).forEach(function (e) { - e.classList.add("visible"), e.classList.remove("current-fragment") - }), nt() + /** + * Applies the configuration settings from the config + * object. May be called multiple times. + */ + function configure( options ) { + + var numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length; + + dom.wrapper.classList.remove( config.transition ); + + // New config options may be passed when this method + // is invoked through the API after initialization + if( typeof options === 'object' ) extend( config, options ); + + // Force linear transition based on browser capabilities + if( features.transforms3d === false ) config.transition = 'linear'; + + dom.wrapper.classList.add( config.transition ); + + dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed ); + dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition ); + + dom.controls.style.display = config.controls ? 'block' : 'none'; + dom.progress.style.display = config.progress ? 'block' : 'none'; + + if( config.rtl ) { + dom.wrapper.classList.add( 'rtl' ); + } + else { + dom.wrapper.classList.remove( 'rtl' ); + } + + if( config.center ) { + dom.wrapper.classList.add( 'center' ); + } + else { + dom.wrapper.classList.remove( 'center' ); + } + + // Exit the paused mode if it was configured off + if( config.pause === false ) { + resume(); + } + + if( config.mouseWheel ) { + document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF + document.addEventListener( 'mousewheel', onDocumentMouseScroll, false ); + } + else { + document.removeEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF + document.removeEventListener( 'mousewheel', onDocumentMouseScroll, false ); + } + + // Rolling 3D links + if( config.rollingLinks ) { + enableRollingLinks(); + } + else { + disableRollingLinks(); + } + + // Iframe link previews + if( config.previewLinks ) { + enablePreviewLinks(); + } + else { + disablePreviewLinks(); + enablePreviewLinks( '[data-preview-link]' ); + } + + // Remove existing auto-slide controls + if( autoSlidePlayer ) { + autoSlidePlayer.destroy(); + autoSlidePlayer = null; + } + + // Generate auto-slide controls if needed + if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable && features.canvas && features.requestAnimationFrame ) { + autoSlidePlayer = new Playback( dom.wrapper, function() { + return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 ); + } ); + + autoSlidePlayer.on( 'click', onAutoSlidePlayerClick ); + autoSlidePaused = false; + } + + // When fragments are turned off they should be visible + if( config.fragments === false ) { + toArray( dom.slides.querySelectorAll( '.fragment' ) ).forEach( function( element ) { + element.classList.add( 'visible' ); + element.classList.remove( 'current-fragment' ); + } ); + } + + sync(); + } - function f() { - if (Rr = !0, window.addEventListener("hashchange", sr, !1), window.addEventListener("resize", cr, !1), xr.touch && (Cr.wrapper.addEventListener("touchstart", _t, !1), Cr.wrapper.addEventListener("touchmove", Kt, !1), Cr.wrapper.addEventListener("touchend", Vt, !1), window.navigator.pointerEnabled ? (Cr.wrapper.addEventListener("pointerdown", Zt, !1), Cr.wrapper.addEventListener("pointermove", Jt, !1), Cr.wrapper.addEventListener("pointerup", Qt, !1)) : window.navigator.msPointerEnabled && (Cr.wrapper.addEventListener("MSPointerDown", Zt, !1), Cr.wrapper.addEventListener("MSPointerMove", Jt, !1), Cr.wrapper.addEventListener("MSPointerUp", Qt, !1))), xr.keyboard && (document.addEventListener("keydown", $t, !1), document.addEventListener("keypress", Ut, !1)), xr.progress && Cr.progress && Cr.progress.addEventListener("click", er, !1), xr.focusBodyOnPageVisibilityChange) { - var e; - "hidden"in document ? e = "visibilitychange" : "msHidden"in document ? e = "msvisibilitychange" : "webkitHidden"in document && (e = "webkitvisibilitychange"), e && document.addEventListener(e, lr, !1) + /** + * Binds all event listeners. + */ + function addEventListeners() { + + eventsAreBound = true; + + window.addEventListener( 'hashchange', onWindowHashChange, false ); + window.addEventListener( 'resize', onWindowResize, false ); + + if( config.touch ) { + dom.wrapper.addEventListener( 'touchstart', onTouchStart, false ); + dom.wrapper.addEventListener( 'touchmove', onTouchMove, false ); + dom.wrapper.addEventListener( 'touchend', onTouchEnd, false ); + + // Support pointer-style touch interaction as well + if( window.navigator.pointerEnabled ) { + // IE 11 uses un-prefixed version of pointer events + dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false ); + dom.wrapper.addEventListener( 'pointermove', onPointerMove, false ); + dom.wrapper.addEventListener( 'pointerup', onPointerUp, false ); + } + else if( window.navigator.msPointerEnabled ) { + // IE 10 uses prefixed version of pointer events + dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false ); + dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false ); + dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false ); + } } - var t = ["touchstart", "click"]; - navigator.userAgent.match(/android/gi) && (t = ["touchstart"]), t.forEach(function (e) { - Cr.controlsLeft.forEach(function (t) { - t.addEventListener(e, tr, !1) - }), Cr.controlsRight.forEach(function (t) { - t.addEventListener(e, rr, !1) - }), Cr.controlsUp.forEach(function (t) { - t.addEventListener(e, nr, !1) - }), Cr.controlsDown.forEach(function (t) { - t.addEventListener(e, ar, !1) - }), Cr.controlsPrev.forEach(function (t) { - t.addEventListener(e, ir, !1) - }), Cr.controlsNext.forEach(function (t) { - t.addEventListener(e, or, !1) - }) - }) + + if( config.keyboard ) { + document.addEventListener( 'keydown', onDocumentKeyDown, false ); + document.addEventListener( 'keypress', onDocumentKeyPress, false ); + } + + if( config.progress && dom.progress ) { + dom.progress.addEventListener( 'click', onProgressClicked, false ); + } + + if( config.focusBodyOnPageVisibilityChange ) { + var visibilityChange; + + if( 'hidden' in document ) { + visibilityChange = 'visibilitychange'; + } + else if( 'msHidden' in document ) { + visibilityChange = 'msvisibilitychange'; + } + else if( 'webkitHidden' in document ) { + visibilityChange = 'webkitvisibilitychange'; + } + + if( visibilityChange ) { + document.addEventListener( visibilityChange, onPageVisibilityChange, false ); + } + } + + // Listen to both touch and click events, in case the device + // supports both + var pointerEvents = [ 'touchstart', 'click' ]; + + // Only support touch for Android, fixes double navigations in + // stock browser + if( navigator.userAgent.match( /android/gi ) ) { + pointerEvents = [ 'touchstart' ]; + } + + pointerEvents.forEach( function( eventName ) { + dom.controlsLeft.forEach( function( el ) { el.addEventListener( eventName, onNavigateLeftClicked, false ); } ); + dom.controlsRight.forEach( function( el ) { el.addEventListener( eventName, onNavigateRightClicked, false ); } ); + dom.controlsUp.forEach( function( el ) { el.addEventListener( eventName, onNavigateUpClicked, false ); } ); + dom.controlsDown.forEach( function( el ) { el.addEventListener( eventName, onNavigateDownClicked, false ); } ); + dom.controlsPrev.forEach( function( el ) { el.addEventListener( eventName, onNavigatePrevClicked, false ); } ); + dom.controlsNext.forEach( function( el ) { el.addEventListener( eventName, onNavigateNextClicked, false ); } ); + } ); + } - function v() { - Rr = !1, document.removeEventListener("keydown", $t, !1), document.removeEventListener("keypress", Ut, !1), window.removeEventListener("hashchange", sr, !1), window.removeEventListener("resize", cr, !1), Cr.wrapper.removeEventListener("touchstart", _t, !1), Cr.wrapper.removeEventListener("touchmove", Kt, !1), Cr.wrapper.removeEventListener("touchend", Vt, !1), window.navigator.pointerEnabled ? (Cr.wrapper.removeEventListener("pointerdown", Zt, !1), Cr.wrapper.removeEventListener("pointermove", Jt, !1), Cr.wrapper.removeEventListener("pointerup", Qt, !1)) : window.navigator.msPointerEnabled && (Cr.wrapper.removeEventListener("MSPointerDown", Zt, !1), Cr.wrapper.removeEventListener("MSPointerMove", Jt, !1), Cr.wrapper.removeEventListener("MSPointerUp", Qt, !1)), xr.progress && Cr.progress && Cr.progress.removeEventListener("click", er, !1), ["touchstart", "click"].forEach(function (e) { - Cr.controlsLeft.forEach(function (t) { - t.removeEventListener(e, tr, !1) - }), Cr.controlsRight.forEach(function (t) { - t.removeEventListener(e, rr, !1) - }), Cr.controlsUp.forEach(function (t) { - t.removeEventListener(e, nr, !1) - }), Cr.controlsDown.forEach(function (t) { - t.removeEventListener(e, ar, !1) - }), Cr.controlsPrev.forEach(function (t) { - t.removeEventListener(e, ir, !1) - }), Cr.controlsNext.forEach(function (t) { - t.removeEventListener(e, or, !1) - }) - }) + /** + * Unbinds all event listeners. + */ + function removeEventListeners() { + + eventsAreBound = false; + + document.removeEventListener( 'keydown', onDocumentKeyDown, false ); + document.removeEventListener( 'keypress', onDocumentKeyPress, false ); + window.removeEventListener( 'hashchange', onWindowHashChange, false ); + window.removeEventListener( 'resize', onWindowResize, false ); + + dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false ); + dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false ); + dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false ); + + // IE11 + if( window.navigator.pointerEnabled ) { + dom.wrapper.removeEventListener( 'pointerdown', onPointerDown, false ); + dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false ); + dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false ); + } + // IE10 + else if( window.navigator.msPointerEnabled ) { + dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false ); + dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false ); + dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false ); + } + + if ( config.progress && dom.progress ) { + dom.progress.removeEventListener( 'click', onProgressClicked, false ); + } + + [ 'touchstart', 'click' ].forEach( function( eventName ) { + dom.controlsLeft.forEach( function( el ) { el.removeEventListener( eventName, onNavigateLeftClicked, false ); } ); + dom.controlsRight.forEach( function( el ) { el.removeEventListener( eventName, onNavigateRightClicked, false ); } ); + dom.controlsUp.forEach( function( el ) { el.removeEventListener( eventName, onNavigateUpClicked, false ); } ); + dom.controlsDown.forEach( function( el ) { el.removeEventListener( eventName, onNavigateDownClicked, false ); } ); + dom.controlsPrev.forEach( function( el ) { el.removeEventListener( eventName, onNavigatePrevClicked, false ); } ); + dom.controlsNext.forEach( function( el ) { el.removeEventListener( eventName, onNavigateNextClicked, false ); } ); + } ); + } - function h(e, t) { - for (var r in t)e[r] = t[r] + /** + * Extend object a with the properties of object b. + * If there's a conflict, object b takes precedence. + */ + function extend( a, b ) { + + for( var i in b ) { + a[ i ] = b[ i ]; + } + } - function g(e) { - return Array.prototype.slice.call(e) + /** + * Converts the target object to an array. + */ + function toArray( o ) { + + return Array.prototype.slice.call( o ); + } - function m(e) { - if ("string" == typeof e) { - if ("null" === e)return null; - if ("true" === e)return !0; - if ("false" === e)return !1; - if (e.match(/^\d+$/))return parseFloat(e) + /** + * Utility for deserializing a value. + */ + function deserialize( value ) { + + if( typeof value === 'string' ) { + if( value === 'null' ) return null; + else if( value === 'true' ) return true; + else if( value === 'false' ) return false; + else if( value.match( /^\d+$/ ) ) return parseFloat( value ); } - return e + + return value; + } - function y(e, t) { - var r = e.x - t.x, n = e.y - t.y; - return Math.sqrt(r * r + n * n) + /** + * Measures the distance in pixels between point a + * and point b. + * + * @param {Object} a point with x/y properties + * @param {Object} b point with x/y properties + */ + function distanceBetween( a, b ) { + + var dx = a.x - b.x, + dy = a.y - b.y; + + return Math.sqrt( dx*dx + dy*dy ); + } - function b(e, t) { - e.style.WebkitTransform = t, e.style.MozTransform = t, e.style.msTransform = t, e.style.transform = t + /** + * Applies a CSS transform to the target element. + */ + function transformElement( element, transform ) { + + element.style.WebkitTransform = transform; + element.style.MozTransform = transform; + element.style.msTransform = transform; + element.style.transform = transform; + } - function w(e) { - "string" == typeof e.layout && (Ir.layout = e.layout), "string" == typeof e.overview && (Ir.overview = e.overview), Ir.layout ? b(Cr.slides, Ir.layout + " " + Ir.overview) : b(Cr.slides, Ir.overview) + /** + * Applies CSS transforms to the slides container. The container + * is transformed from two separate sources: layout and the overview + * mode. + */ + function transformSlides( transforms ) { + + // Pick up new transforms from arguments + if( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout; + if( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview; + + // Apply the transforms to the slides container + if( slidesTransform.layout ) { + transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview ); + } + else { + transformElement( dom.slides, slidesTransform.overview ); + } + } - function L(e) { - var t = document.createElement("style"); - t.type = "text/css", t.styleSheet ? t.styleSheet.cssText = e : t.appendChild(document.createTextNode(e)), document.getElementsByTagName("head")[0].appendChild(t) + /** + * Injects the given CSS styles into the DOM. + */ + function injectStyleSheet( value ) { + + var tag = document.createElement( 'style' ); + tag.type = 'text/css'; + if( tag.styleSheet ) { + tag.styleSheet.cssText = value; + } + else { + tag.appendChild( document.createTextNode( value ) ); + } + document.getElementsByTagName( 'head' )[0].appendChild( tag ); + } - function k(e) { - var t = e.match(/^#([0-9a-f]{3})$/i); - if (t && t[1])return t = t[1], { - r: 17 * parseInt(t.charAt(0), 16), - g: 17 * parseInt(t.charAt(1), 16), - b: 17 * parseInt(t.charAt(2), 16) - }; - var r = e.match(/^#([0-9a-f]{6})$/i); - if (r && r[1])return r = r[1], { - r: parseInt(r.substr(0, 2), 16), - g: parseInt(r.substr(2, 2), 16), - b: parseInt(r.substr(4, 2), 16) - }; - var n = e.match(/^rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/i); - if (n)return {r: parseInt(n[1], 10), g: parseInt(n[2], 10), b: parseInt(n[3], 10)}; - var a = e.match(/^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i); - return a ? {r: parseInt(a[1], 10), g: parseInt(a[2], 10), b: parseInt(a[3], 10), a: parseFloat(a[4])} : null + /** + * Measures the distance in pixels between point a and point b. + * + * @param {String} color The string representation of a color, + * the following formats are supported: + * - #000 + * - #000000 + * - rgb(0,0,0) + */ + function colorToRgb( color ) { + + var hex3 = color.match( /^#([0-9a-f]{3})$/i ); + if( hex3 && hex3[1] ) { + hex3 = hex3[1]; + return { + r: parseInt( hex3.charAt( 0 ), 16 ) * 0x11, + g: parseInt( hex3.charAt( 1 ), 16 ) * 0x11, + b: parseInt( hex3.charAt( 2 ), 16 ) * 0x11 + }; + } + + var hex6 = color.match( /^#([0-9a-f]{6})$/i ); + if( hex6 && hex6[1] ) { + hex6 = hex6[1]; + return { + r: parseInt( hex6.substr( 0, 2 ), 16 ), + g: parseInt( hex6.substr( 2, 2 ), 16 ), + b: parseInt( hex6.substr( 4, 2 ), 16 ) + }; + } + + var rgb = color.match( /^rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/i ); + if( rgb ) { + return { + r: parseInt( rgb[1], 10 ), + g: parseInt( rgb[2], 10 ), + b: parseInt( rgb[3], 10 ) + }; + } + + var rgba = color.match( /^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i ); + if( rgba ) { + return { + r: parseInt( rgba[1], 10 ), + g: parseInt( rgba[2], 10 ), + b: parseInt( rgba[3], 10 ), + a: parseFloat( rgba[4] ) + }; + } + + return null; + } - function A(e) { - return "string" == typeof e && (e = k(e)), e ? (299 * e.r + 587 * e.g + 114 * e.b) / 1e3 : null + /** + * Calculates brightness on a scale of 0-255. + * + * @param color See colorStringToRgb for supported formats. + */ + function colorBrightness( color ) { + + if( typeof color === 'string' ) color = colorToRgb( color ); + + if( color ) { + return ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000; + } + + return null; + } - function E(e) { - var t = 0; - if (e) { - var r = 0; - g(e.childNodes).forEach(function (e) { - "number" == typeof e.offsetTop && e.style && ("absolute" === window.getComputedStyle(e).position && (r += 1), t = Math.max(t, e.offsetTop + e.offsetHeight)) - }), 0 === r && (t = e.offsetHeight) + /** + * Retrieves the height of the given element by looking + * at the position and height of its immediate children. + */ + function getAbsoluteHeight( element ) { + + var height = 0; + + if( element ) { + var absoluteChildren = 0; + + toArray( element.childNodes ).forEach( function( child ) { + + if( typeof child.offsetTop === 'number' && child.style ) { + // Count # of abs children + if( window.getComputedStyle( child ).position === 'absolute' ) { + absoluteChildren += 1; + } + + height = Math.max( height, child.offsetTop + child.offsetHeight ); + } + + } ); + + // If there are no absolute children, use offsetHeight + if( absoluteChildren === 0 ) { + height = element.offsetHeight; + } + } - return t + + return height; + } - function S(e, t) { - if (t = t || 0, e) { - var r, n = e.style.height; - return e.style.height = "0px", r = t - e.parentNode.offsetHeight, e.style.height = n + "px", r + /** + * Returns the remaining height within the parent of the + * target element. + * + * remaining height = [ configured parent height ] - [ current parent height ] + */ + function getRemainingHeight( element, height ) { + + height = height || 0; + + if( element ) { + var newHeight, oldHeight = element.style.height; + + // Change the .stretch element height to 0 in order find the height of all + // the other elements + element.style.height = '0px'; + newHeight = height - element.parentNode.offsetHeight; + + // Restore the old height, just in case + element.style.height = oldHeight + 'px'; + + return newHeight; } - return t + + return height; + } - function x() { - return /print-pdf/gi.test(window.location.search) + /** + * Checks if this instance is being used to print a PDF. + */ + function isPrintingPDF() { + + return ( /print-pdf/gi ).test( window.location.search ); + } - function q() { - xr.hideAddressBar && wr && (window.addEventListener("load", M, !1), window.addEventListener("orientationchange", M, !1)) + /** + * Hides the address bar if we're on a mobile device. + */ + function hideAddressBar() { + + if( config.hideAddressBar && isMobileDevice ) { + // Events that should trigger the address bar to hide + window.addEventListener( 'load', removeAddressBar, false ); + window.addEventListener( 'orientationchange', removeAddressBar, false ); + } + } - function M() { - setTimeout(function () { - window.scrollTo(0, 1) - }, 10) + /** + * Causes the address bar to hide on mobile devices, + * more vertical space ftw. + */ + function removeAddressBar() { + + setTimeout( function() { + window.scrollTo( 0, 1 ); + }, 10 ); + } - function T(e, t) { - var r = document.createEvent("HTMLEvents", 1, 2); - r.initEvent(e, !0, !0), h(r, t), Cr.wrapper.dispatchEvent(r), xr.postMessageEvents && window.parent !== window.self && window.parent.postMessage(JSON.stringify({ - namespace: "reveal", - eventName: e, - state: Mt() - }), "*") + /** + * Dispatches an event of the specified type from the + * reveal DOM element. + */ + function dispatchEvent( type, args ) { + + var event = document.createEvent( 'HTMLEvents', 1, 2 ); + event.initEvent( type, true, true ); + extend( event, args ); + dom.wrapper.dispatchEvent( event ); + + // If we're in an iframe, post each reveal.js event to the + // parent window. Used by the notes plugin + if( config.postMessageEvents && window.parent !== window.self ) { + window.parent.postMessage( JSON.stringify({ namespace: 'reveal', eventName: type, state: getState() }), '*' ); + } + } - function N() { - if (Pr.transforms3d && !("msPerspective"in document.body.style))for (var e = Cr.wrapper.querySelectorAll(kr + " a"), t = 0, r = e.length; r > t; t++) { - var n = e[t]; - if (!(!n.textContent || n.querySelector("*") || n.className && n.classList.contains(n, "roll"))) { - var a = document.createElement("span"); - a.setAttribute("data-title", n.text), a.innerHTML = n.innerHTML, n.classList.add("roll"), n.innerHTML = "", n.appendChild(a) + /** + * Wrap all links in 3D goodness. + */ + function enableRollingLinks() { + + if( features.transforms3d && !( 'msPerspective' in document.body.style ) ) { + var anchors = dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' a' ); + + for( var i = 0, len = anchors.length; i < len; i++ ) { + var anchor = anchors[i]; + + if( anchor.textContent && !anchor.querySelector( '*' ) && ( !anchor.className || !anchor.classList.contains( anchor, 'roll' ) ) ) { + var span = document.createElement('span'); + span.setAttribute('data-title', anchor.text); + span.innerHTML = anchor.innerHTML; + + anchor.classList.add( 'roll' ); + anchor.innerHTML = ''; + anchor.appendChild(span); + } } } + } - function I() { - for (var e = Cr.wrapper.querySelectorAll(kr + " a.roll"), t = 0, r = e.length; r > t; t++) { - var n = e[t], a = n.querySelector("span"); - a && (n.classList.remove("roll"), n.innerHTML = a.innerHTML) + /** + * Unwrap all 3D links. + */ + function disableRollingLinks() { + + var anchors = dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' a.roll' ); + + for( var i = 0, len = anchors.length; i < len; i++ ) { + var anchor = anchors[i]; + var span = anchor.querySelector( 'span' ); + + if( span ) { + anchor.classList.remove( 'roll' ); + anchor.innerHTML = span.innerHTML; + } } + } - function C(e) { - var t = g(document.querySelectorAll(e ? e : "a")); - t.forEach(function (e) { - /^(http|www)/gi.test(e.getAttribute("href")) && e.addEventListener("click", ur, !1) - }) + /** + * Bind preview frame links. + */ + function enablePreviewLinks( selector ) { + + var anchors = toArray( document.querySelectorAll( selector ? selector : 'a' ) ); + + anchors.forEach( function( element ) { + if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) { + element.addEventListener( 'click', onPreviewLinkClicked, false ); + } + } ); + } - function P() { - var e = g(document.querySelectorAll("a")); - e.forEach(function (e) { - /^(http|www)/gi.test(e.getAttribute("href")) && e.removeEventListener("click", ur, !1) - }) + /** + * Unbind preview frame links. + */ + function disablePreviewLinks() { + + var anchors = toArray( document.querySelectorAll( 'a' ) ); + + anchors.forEach( function( element ) { + if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) { + element.removeEventListener( 'click', onPreviewLinkClicked, false ); + } + } ); + } - function D(e) { - R(), Cr.overlay = document.createElement("div"), Cr.overlay.classList.add("overlay"), Cr.overlay.classList.add("overlay-preview"), Cr.wrapper.appendChild(Cr.overlay), Cr.overlay.innerHTML = ["<header>", '<a class="close" href="#"><span class="icon"></span></a>', '<a class="external" href="' + e + '" target="_blank"><span class="icon"></span></a>', "</header>", '<div class="spinner"></div>', '<div class="viewport">', '<iframe src="' + e + '"></iframe>', "</div>"].join(""), Cr.overlay.querySelector("iframe").addEventListener("load", function () { - Cr.overlay.classList.add("loaded") - }, !1), Cr.overlay.querySelector(".close").addEventListener("click", function (e) { - R(), e.preventDefault() - }, !1), Cr.overlay.querySelector(".external").addEventListener("click", function () { - R() - }, !1), setTimeout(function () { - Cr.overlay.classList.add("visible") - }, 1) + /** + * Opens a preview window for the target URL. + */ + function showPreview( url ) { + + closeOverlay(); + + dom.overlay = document.createElement( 'div' ); + dom.overlay.classList.add( 'overlay' ); + dom.overlay.classList.add( 'overlay-preview' ); + dom.wrapper.appendChild( dom.overlay ); + + dom.overlay.innerHTML = [ + '<header>', + '<a class="close" href="#"><span class="icon"></span></a>', + '<a class="external" href="'+ url +'" target="_blank"><span class="icon"></span></a>', + '</header>', + '<div class="spinner"></div>', + '<div class="viewport">', + '<iframe src="'+ url +'"></iframe>', + '</div>' + ].join(''); + + dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', function( event ) { + dom.overlay.classList.add( 'loaded' ); + }, false ); + + dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) { + closeOverlay(); + event.preventDefault(); + }, false ); + + dom.overlay.querySelector( '.external' ).addEventListener( 'click', function( event ) { + closeOverlay(); + }, false ); + + setTimeout( function() { + dom.overlay.classList.add( 'visible' ); + }, 1 ); + } - function H() { - if (xr.help) { - R(), Cr.overlay = document.createElement("div"), Cr.overlay.classList.add("overlay"), Cr.overlay.classList.add("overlay-help"), Cr.wrapper.appendChild(Cr.overlay); - var e = '<p class="title">Keyboard Shortcuts</p><br/>'; - e += "<table><th>KEY</th><th>ACTION</th>"; - for (var t in Xr)e += "<tr><td>" + t + "</td><td>" + Xr[t] + "</td></tr>"; - e += "</table>", Cr.overlay.innerHTML = ["<header>", '<a class="close" href="#"><span class="icon"></span></a>', "</header>", '<div class="viewport">', '<div class="viewport-inner">' + e + "</div>", "</div>"].join(""), Cr.overlay.querySelector(".close").addEventListener("click", function (e) { - R(), e.preventDefault() - }, !1), setTimeout(function () { - Cr.overlay.classList.add("visible") - }, 1) + /** + * Opens a overlay window with help material. + */ + function showHelp() { + + if( config.help ) { + + closeOverlay(); + + dom.overlay = document.createElement( 'div' ); + dom.overlay.classList.add( 'overlay' ); + dom.overlay.classList.add( 'overlay-help' ); + dom.wrapper.appendChild( dom.overlay ); + + var html = '<p class="title">Keyboard Shortcuts</p><br/>'; + + html += '<table><th>KEY</th><th>ACTION</th>'; + for( var key in keyboardShortcuts ) { + html += '<tr><td>' + key + '</td><td>' + keyboardShortcuts[ key ] + '</td></tr>'; + } + + html += '</table>'; + + dom.overlay.innerHTML = [ + '<header>', + '<a class="close" href="#"><span class="icon"></span></a>', + '</header>', + '<div class="viewport">', + '<div class="viewport-inner">'+ html +'</div>', + '</div>' + ].join(''); + + dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) { + closeOverlay(); + event.preventDefault(); + }, false ); + + setTimeout( function() { + dom.overlay.classList.add( 'visible' ); + }, 1 ); + } + } - function R() { - Cr.overlay && (Cr.overlay.parentNode.removeChild(Cr.overlay), Cr.overlay = null) + /** + * Closes any currently open overlay. + */ + function closeOverlay() { + + if( dom.overlay ) { + dom.overlay.parentNode.removeChild( dom.overlay ); + dom.overlay = null; + } + } - function W() { - if (Cr.wrapper && !x()) { - var e = z(), t = 20; - O(xr.width, xr.height, t), Cr.slides.style.width = e.width + "px", Cr.slides.style.height = e.height + "px", Nr = Math.min(e.presentationWidth / e.width, e.presentationHeight / e.height), Nr = Math.max(Nr, xr.minScale), Nr = Math.min(Nr, xr.maxScale), 1 === Nr ? (Cr.slides.style.zoom = "", Cr.slides.style.left = "", Cr.slides.style.top = "", Cr.slides.style.bottom = "", Cr.slides.style.right = "", w({layout: ""})) : !wr && /chrome/i.test(navigator.userAgent) && "undefined" != typeof Cr.slides.style.zoom ? (Cr.slides.style.zoom = Nr, w({layout: ""})) : (Cr.slides.style.left = "50%", Cr.slides.style.top = "50%", Cr.slides.style.bottom = "auto", Cr.slides.style.right = "auto", w({layout: "translate(-50%, -50%) scale(" + Nr + ")"})); - for (var r = g(Cr.wrapper.querySelectorAll(kr)), n = 0, a = r.length; a > n; n++) { - var i = r[n]; - "none" !== i.style.display && (i.style.top = xr.center || i.classList.contains("center") ? i.classList.contains("stack") ? 0 : Math.max((e.height - E(i)) / 2 - t, 0) + "px" : "") + /** + * Applies JavaScript-controlled layout rules to the + * presentation. + */ + function layout() { + + if( dom.wrapper && !isPrintingPDF() ) { + + var size = getComputedSlideSize(); + + var slidePadding = 20; // TODO Dig this out of DOM + + // Layout the contents of the slides + layoutSlideContents( config.width, config.height, slidePadding ); + + dom.slides.style.width = size.width + 'px'; + dom.slides.style.height = size.height + 'px'; + + // Determine scale of content to fit within available space + scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height ); + + // Respect max/min scale settings + scale = Math.max( scale, config.minScale ); + scale = Math.min( scale, config.maxScale ); + + // Don't apply any scaling styles if scale is 1 + if( scale === 1 ) { + dom.slides.style.zoom = ''; + dom.slides.style.left = ''; + dom.slides.style.top = ''; + dom.slides.style.bottom = ''; + dom.slides.style.right = ''; + transformSlides( { layout: '' } ); } - ct(), pt() + else { + // Prefer zooming in desktop Chrome so that content remains crisp + if( !isMobileDevice && /chrome/i.test( navigator.userAgent ) && typeof dom.slides.style.zoom !== 'undefined' ) { + dom.slides.style.zoom = scale; + transformSlides( { layout: '' } ); + } + // Apply scale transform as a fallback + else { + // dom.slides.style.left = '50%'; + // dom.slides.style.top = '50%'; + // dom.slides.style.bottom = 'auto'; + // dom.slides.style.right = 'auto'; + transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +') translate(50%,50%)' } ); + } + } + + // Select all slides, vertical and horizontal + var slides = toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ); + + for( var i = 0, len = slides.length; i < len; i++ ) { + var slide = slides[ i ]; + + // Don't bother updating invisible slides + if( slide.style.display === 'none' ) { + continue; + } + + if( config.center || slide.classList.contains( 'center' ) ) { + // Vertical stacks are not centred since their section + // children will be + if( slide.classList.contains( 'stack' ) ) { + slide.style.top = 0; + } + else { + slide.style.top = Math.max( ( ( size.height - getAbsoluteHeight( slide ) ) / 2 ) - slidePadding, 0 ) + 'px'; + } + } + else { + slide.style.top = ''; + } + + } + + updateProgress(); + updateParallax(); + } + } - function O(e, t) { - g(Cr.slides.querySelectorAll("section > .stretch")).forEach(function (r) { - var n = S(r, t); - if (/(img|video)/gi.test(r.nodeName)) { - var a = r.naturalWidth || r.videoWidth, i = r.naturalHeight || r.videoHeight, o = Math.min(e / a, n / i); - r.style.width = a * o + "px", r.style.height = i * o + "px" - } else r.style.width = e + "px", r.style.height = n + "px" - }) + /** + * Applies layout logic to the contents of all slides in + * the presentation. + */ + function layoutSlideContents( width, height, padding ) { + + // Handle sizing of elements with the 'stretch' class + toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( function( element ) { + + // Determine how much vertical space we can use + var remainingHeight = getRemainingHeight( element, height ); + + // Consider the aspect ratio of media elements + if( /(img|video)/gi.test( element.nodeName ) ) { + var nw = element.naturalWidth || element.videoWidth, + nh = element.naturalHeight || element.videoHeight; + + var es = Math.min( width / nw, remainingHeight / nh ); + + element.style.width = ( nw * es ) + 'px'; + element.style.height = ( nh * es ) + 'px'; + + } + else { + element.style.width = width + 'px'; + element.style.height = remainingHeight + 'px'; + } + + } ); + } - function z(e, t) { - var r = { - width: xr.width, - height: xr.height, - presentationWidth: e || Cr.wrapper.offsetWidth, - presentationHeight: t || Cr.wrapper.offsetHeight + /** + * Calculates the computed pixel size of our slides. These + * values are based on the width and height configuration + * options. + */ + function getComputedSlideSize( presentationWidth, presentationHeight ) { + + var size = { + // Slide size + width: config.width, + height: config.height, + + // Presentation size + presentationWidth: presentationWidth || dom.wrapper.offsetWidth, + presentationHeight: presentationHeight || dom.wrapper.offsetHeight }; - return r.presentationWidth -= r.presentationHeight * xr.margin, r.presentationHeight -= r.presentationHeight * xr.margin, "string" == typeof r.width && /%$/.test(r.width) && (r.width = parseInt(r.width, 10) / 100 * r.presentationWidth), "string" == typeof r.height && /%$/.test(r.height) && (r.height = parseInt(r.height, 10) / 100 * r.presentationHeight), r + + // Reduce available space by margin + size.presentationWidth -= ( size.presentationHeight * config.margin ); + size.presentationHeight -= ( size.presentationHeight * config.margin ); + + // Slide width may be a percentage of available width + if( typeof size.width === 'string' && /%$/.test( size.width ) ) { + size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth; + } + + // Slide height may be a percentage of available height + if( typeof size.height === 'string' && /%$/.test( size.height ) ) { + size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight; + } + + return size; + } - function F(e, t) { - "object" == typeof e && "function" == typeof e.setAttribute && e.setAttribute("data-previous-indexv", t || 0) + /** + * Stores the vertical index of a stack so that the same + * vertical slide can be selected when navigating to and + * from the stack. + * + * @param {HTMLElement} stack The vertical stack element + * @param {int} v Index to memorize + */ + function setPreviousVerticalIndex( stack, v ) { + + if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) { + stack.setAttribute( 'data-previous-indexv', v || 0 ); + } + } - function Y(e) { - if ("object" == typeof e && "function" == typeof e.setAttribute && e.classList.contains("stack")) { - var t = e.hasAttribute("data-start-indexv") ? "data-start-indexv" : "data-previous-indexv"; - return parseInt(e.getAttribute(t) || 0, 10) + /** + * Retrieves the vertical index which was stored using + * #setPreviousVerticalIndex() or 0 if no previous index + * exists. + * + * @param {HTMLElement} stack The vertical stack element + */ + function getPreviousVerticalIndex( stack ) { + + if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) { + // Prefer manually defined start-indexv + var attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv'; + + return parseInt( stack.getAttribute( attributeName ) || 0, 10 ); } - return 0 + + return 0; + } - function X() { - xr.overview && !_() && (Mr = !0, Cr.wrapper.classList.add("overview"), Cr.wrapper.classList.remove("overview-deactivating"), Pr.overviewTransitions && setTimeout(function () { - Cr.wrapper.classList.add("overview-animated") - }, 1), Ht(), Cr.slides.appendChild(Cr.background), g(Cr.wrapper.querySelectorAll(kr)).forEach(function (e) { - e.classList.contains("stack") || e.addEventListener("click", dr, !0) - }), st(), j(), B(), W(), T("overviewshown", {indexh: hr, indexv: gr, currentSlide: yr})) + /** + * Displays the overview of slides (quick nav) by scaling + * down and arranging all slide elements. + */ + function activateOverview() { + + // Only proceed if enabled in config + if( config.overview && !isOverview() ) { + + overview = true; + + dom.wrapper.classList.add( 'overview' ); + dom.wrapper.classList.remove( 'overview-deactivating' ); + + if( features.overviewTransitions ) { + setTimeout( function() { + dom.wrapper.classList.add( 'overview-animated' ); + }, 1 ); + } + + // Don't auto-slide while in overview mode + cancelAutoSlide(); + + // Move the backgrounds element into the slide container to + // that the same scaling is applied + dom.slides.appendChild( dom.background ); + + // Clicking on an overview slide navigates to it + toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) { + if( !slide.classList.contains( 'stack' ) ) { + slide.addEventListener( 'click', onOverviewSlideClicked, true ); + } + } ); + + updateSlidesVisibility(); + layoutOverview(); + updateOverview(); + + layout(); + + // Notify observers of the overview showing + dispatchEvent( 'overviewshown', { + 'indexh': indexh, + 'indexv': indexv, + 'currentSlide': currentSlide + } ); + + } + } - function j() { - var e = 70, t = xr.width + e, r = xr.height + e; - xr.rtl && (t = -t), g(Cr.wrapper.querySelectorAll(Ar)).forEach(function (e, n) { - e.setAttribute("data-index-h", n), b(e, "translate3d(" + n * t + "px, 0, 0)"), e.classList.contains("stack") && g(e.querySelectorAll("section")).forEach(function (e, t) { - e.setAttribute("data-index-h", n), e.setAttribute("data-index-v", t), b(e, "translate3d(0, " + t * r + "px, 0)") - }) - }), g(Cr.background.childNodes).forEach(function (e, n) { - b(e, "translate3d(" + n * t + "px, 0, 0)"), g(e.querySelectorAll(".slide-background")).forEach(function (e, t) { - b(e, "translate3d(0, " + t * r + "px, 0)") - }) - }) + /** + * Uses CSS transforms to position all slides in a grid for + * display inside of the overview mode. + */ + function layoutOverview() { + + var margin = 70; + var slideWidth = config.width + margin, + slideHeight = config.height + margin; + + // Reverse in RTL mode + if( config.rtl ) { + slideWidth = -slideWidth; + } + + // Layout slides + toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) { + hslide.setAttribute( 'data-index-h', h ); + transformElement( hslide, 'translate3d(' + ( h * slideWidth ) + 'px, 0, 0)' ); + + if( hslide.classList.contains( 'stack' ) ) { + + toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) { + vslide.setAttribute( 'data-index-h', h ); + vslide.setAttribute( 'data-index-v', v ); + + transformElement( vslide, 'translate3d(0, ' + ( v * slideHeight ) + 'px, 0)' ); + } ); + + } + } ); + + // Layout slide backgrounds + toArray( dom.background.childNodes ).forEach( function( hbackground, h ) { + transformElement( hbackground, 'translate3d(' + ( h * slideWidth ) + 'px, 0, 0)' ); + + toArray( hbackground.querySelectorAll( '.slide-background' ) ).forEach( function( vbackground, v ) { + transformElement( vbackground, 'translate3d(0, ' + ( v * slideHeight ) + 'px, 0)' ); + } ); + } ); + } - function B() { - var e = 70, t = xr.width + e, r = xr.height + e; - xr.rtl && (t = -t), w({overview: ["translateX(" + -hr * t + "px)", "translateY(" + -gr * r + "px)", "translateZ(" + (window.innerWidth < 400 ? -1e3 : -2500) + "px)"].join(" ")}) + /** + * Moves the overview viewport to the current slides. + * Called each time the current slide changes. + */ + function updateOverview() { + + var margin = 70; + var slideWidth = config.width + margin, + slideHeight = config.height + margin; + + // Reverse in RTL mode + if( config.rtl ) { + slideWidth = -slideWidth; + } + + transformSlides( { + overview: [ + 'translateX('+ ( -indexh * slideWidth ) +'px)', + 'translateY('+ ( -indexv * slideHeight ) +'px)', + 'translateZ('+ ( window.innerWidth < 400 ? -1000 : -2500 ) +'px)' + ].join( ' ' ) + } ); + } - function U() { - xr.overview && (Mr = !1, Cr.wrapper.classList.remove("overview"), Cr.wrapper.classList.remove("overview-animated"), Cr.wrapper.classList.add("overview-deactivating"), setTimeout(function () { - Cr.wrapper.classList.remove("overview-deactivating") - }, 1), Cr.wrapper.appendChild(Cr.background), g(Cr.wrapper.querySelectorAll(kr)).forEach(function (e) { - b(e, ""), e.removeEventListener("click", dr, !0) - }), g(Cr.background.querySelectorAll(".slide-background")).forEach(function (e) { - b(e, "") - }), w({overview: ""}), rt(hr, gr), W(), Dt(), T("overviewhidden", {indexh: hr, indexv: gr, currentSlide: yr})) + /** + * Exits the slide overview and enters the currently + * active slide. + */ + function deactivateOverview() { + + // Only proceed if enabled in config + if( config.overview ) { + + overview = false; + + dom.wrapper.classList.remove( 'overview' ); + dom.wrapper.classList.remove( 'overview-animated' ); + + // Temporarily add a class so that transitions can do different things + // depending on whether they are exiting/entering overview, or just + // moving from slide to slide + dom.wrapper.classList.add( 'overview-deactivating' ); + + setTimeout( function () { + dom.wrapper.classList.remove( 'overview-deactivating' ); + }, 1 ); + + // Move the background element back out + dom.wrapper.appendChild( dom.background ); + + // Clean up changes made to slides + toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) { + transformElement( slide, '' ); + + slide.removeEventListener( 'click', onOverviewSlideClicked, true ); + } ); + + // Clean up changes made to backgrounds + toArray( dom.background.querySelectorAll( '.slide-background' ) ).forEach( function( background ) { + transformElement( background, '' ); + } ); + + transformSlides( { overview: '' } ); + + slide( indexh, indexv ); + + layout(); + + cueAutoSlide(); + + // Notify observers of the overview hiding + dispatchEvent( 'overviewhidden', { + 'indexh': indexh, + 'indexv': indexv, + 'currentSlide': currentSlide + } ); + + } } - function $(e) { - "boolean" == typeof e ? e ? X() : U() : _() ? U() : X() + /** + * Toggles the slide overview mode on and off. + * + * @param {Boolean} override Optional flag which overrides the + * toggle logic and forcibly sets the desired state. True means + * overview is open, false means it's closed. + */ + function toggleOverview( override ) { + + if( typeof override === 'boolean' ) { + override ? activateOverview() : deactivateOverview(); + } + else { + isOverview() ? deactivateOverview() : activateOverview(); + } + } - function _() { - return Mr + /** + * Checks if the overview is currently active. + * + * @return {Boolean} true if the overview is active, + * false otherwise + */ + function isOverview() { + + return overview; + } - function K(e) { - return e = e ? e : yr, e && e.parentNode && !!e.parentNode.nodeName.match(/section/i) + /** + * Checks if the current or specified slide is vertical + * (nested within another slide). + * + * @param {HTMLElement} slide [optional] The slide to check + * orientation of + */ + function isVerticalSlide( slide ) { + + // Prefer slide argument, otherwise use current slide + slide = slide ? slide : currentSlide; + + return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i ); + } - function V() { - var e = document.body, t = e.requestFullScreen || e.webkitRequestFullscreen || e.webkitRequestFullScreen || e.mozRequestFullScreen || e.msRequestFullscreen; - t && t.apply(e) + /** + * Handling the fullscreen functionality via the fullscreen API + * + * @see http://fullscreen.spec.whatwg.org/ + * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode + */ + function enterFullscreen() { + + var element = document.body; + + // Check which implementation is available + var requestMethod = element.requestFullScreen || + element.webkitRequestFullscreen || + element.webkitRequestFullScreen || + element.mozRequestFullScreen || + element.msRequestFullscreen; + + if( requestMethod ) { + requestMethod.apply( element ); + } + } - function Z() { - if (xr.pause) { - var e = Cr.wrapper.classList.contains("paused"); - Ht(), Cr.wrapper.classList.add("paused"), e === !1 && T("paused") + /** + * Enters the paused mode which fades everything on screen to + * black. + */ + function pause() { + + if( config.pause ) { + var wasPaused = dom.wrapper.classList.contains( 'paused' ); + + cancelAutoSlide(); + dom.wrapper.classList.add( 'paused' ); + + if( wasPaused === false ) { + dispatchEvent( 'paused' ); + } } + } - function J() { - var e = Cr.wrapper.classList.contains("paused"); - Cr.wrapper.classList.remove("paused"), Dt(), e && T("resumed") + /** + * Exits from the paused mode. + */ + function resume() { + + var wasPaused = dom.wrapper.classList.contains( 'paused' ); + dom.wrapper.classList.remove( 'paused' ); + + cueAutoSlide(); + + if( wasPaused ) { + dispatchEvent( 'resumed' ); + } + } - function Q(e) { - "boolean" == typeof e ? e ? Z() : J() : G() ? J() : Z() + /** + * Toggles the paused mode on and off. + */ + function togglePause( override ) { + + if( typeof override === 'boolean' ) { + override ? pause() : resume(); + } + else { + isPaused() ? resume() : pause(); + } + } - function G() { - return Cr.wrapper.classList.contains("paused") + /** + * Checks if we are currently in the paused mode. + */ + function isPaused() { + + return dom.wrapper.classList.contains( 'paused' ); + } - function et(e) { - "boolean" == typeof e ? e ? Wt() : Rt() : Fr ? Wt() : Rt() + /** + * Toggles the auto slide mode on and off. + * + * @param {Boolean} override Optional flag which sets the desired state. + * True means autoplay starts, false means it stops. + */ + + function toggleAutoSlide( override ) { + + if( typeof override === 'boolean' ) { + override ? resumeAutoSlide() : pauseAutoSlide(); + } + + else { + autoSlidePaused ? resumeAutoSlide() : pauseAutoSlide(); + } + } - function tt() { - return !(!Wr || Fr) + /** + * Checks if the auto slide mode is currently on. + */ + function isAutoSliding() { + + return !!( autoSlide && !autoSlidePaused ); + } - function rt(e, t, r, n) { - mr = yr; - var a = Cr.wrapper.querySelectorAll(Ar); - void 0 !== t || _() || (t = Y(a[e])), mr && mr.parentNode && mr.parentNode.classList.contains("stack") && F(mr.parentNode, gr); - var i = Tr.concat(); - Tr.length = 0; - var o = hr || 0, s = gr || 0; - hr = ot(Ar, void 0 === e ? hr : e), gr = ot(Er, void 0 === t ? gr : t), st(), W(); - e:for (var c = 0, l = Tr.length; l > c; c++) { - for (var d = 0; d < i.length; d++)if (i[d] === Tr[c]) { - i.splice(d, 1); - continue e + /** + * Steps from the current point in the presentation to the + * slide which matches the specified horizontal and vertical + * indices. + * + * @param {int} h Horizontal index of the target slide + * @param {int} v Vertical index of the target slide + * @param {int} f Optional index of a fragment within the + * target slide to activate + * @param {int} o Optional origin for use in multimaster environments + */ + function slide( h, v, f, o ) { + + // Remember where we were at before + previousSlide = currentSlide; + + // Query all horizontal slides in the deck + var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ); + + // If no vertical index is specified and the upcoming slide is a + // stack, resume at its previous vertical index + if( v === undefined && !isOverview() ) { + v = getPreviousVerticalIndex( horizontalSlides[ h ] ); + } + + // If we were on a vertical stack, remember what vertical index + // it was on so we can resume at the same position when returning + if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) { + setPreviousVerticalIndex( previousSlide.parentNode, indexv ); + } + + // Remember the state before this slide + var stateBefore = state.concat(); + + // Reset the state array + state.length = 0; + + var indexhBefore = indexh || 0, + indexvBefore = indexv || 0; + + // Activate and transition to the new slide + indexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h ); + indexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v ); + + // Update the visibility of slides now that the indices have changed + updateSlidesVisibility(); + + layout(); + + // Apply the new state + stateLoop: for( var i = 0, len = state.length; i < len; i++ ) { + // Check if this state existed on the previous slide. If it + // did, we will avoid adding it repeatedly + for( var j = 0; j < stateBefore.length; j++ ) { + if( stateBefore[j] === state[i] ) { + stateBefore.splice( j, 1 ); + continue stateLoop; + } } - document.documentElement.classList.add(Tr[c]), T(Tr[c]) + + document.documentElement.classList.add( state[i] ); + + // Dispatch custom event matching the state's name + dispatchEvent( state[i] ); } - for (; i.length;)document.documentElement.classList.remove(i.pop()); - _() && B(); - var u = a[hr], p = u.querySelectorAll("section"); - yr = p[gr] || u, "undefined" != typeof r && It(r); - var f = hr !== o || gr !== s; - f ? T("slidechanged", { - indexh: hr, - indexv: gr, - previousSlide: mr, - currentSlide: yr, - origin: n - }) : mr = null, mr && (mr.classList.remove("present"), mr.setAttribute("aria-hidden", "true"), Cr.wrapper.querySelector(Sr).classList.contains("present") && setTimeout(function () { - var e, t = g(Cr.wrapper.querySelectorAll(Ar + ".stack")); - for (e in t)t[e] && F(t[e], 0) - }, 0)), (f || !mr) && (bt(mr), yt(yr)), Cr.statusDiv.textContent = yr.textContent, dt(), ct(), ut(), pt(), lt(), At(), Dt() + + // Clean up the remains of the previous state + while( stateBefore.length ) { + document.documentElement.classList.remove( stateBefore.pop() ); + } + + // Update the overview if it's currently active + if( isOverview() ) { + updateOverview(); + } + + // Find the current horizontal slide and any possible vertical slides + // within it + var currentHorizontalSlide = horizontalSlides[ indexh ], + currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' ); + + // Store references to the previous and current slides + currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide; + + // Show fragment, if specified + if( typeof f !== 'undefined' ) { + navigateFragment( f ); + } + + // Dispatch an event if the slide changed + var slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore ); + if( slideChanged ) { + dispatchEvent( 'slidechanged', { + 'indexh': indexh, + 'indexv': indexv, + 'previousSlide': previousSlide, + 'currentSlide': currentSlide, + 'origin': o + } ); + } + else { + // Ensure that the previous slide is never the same as the current + previousSlide = null; + } + + // Solves an edge case where the previous slide maintains the + // 'present' class when navigating between adjacent vertical + // stacks + if( previousSlide ) { + previousSlide.classList.remove( 'present' ); + previousSlide.setAttribute( 'aria-hidden', 'true' ); + + // Reset all slides upon navigate to home + // Issue: #285 + if ( dom.wrapper.querySelector( HOME_SLIDE_SELECTOR ).classList.contains( 'present' ) ) { + // Launch async task + setTimeout( function () { + var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.stack') ), i; + for( i in slides ) { + if( slides[i] ) { + // Reset stack + setPreviousVerticalIndex( slides[i], 0 ); + } + } + }, 0 ); + } + } + + // Handle embedded content + if( slideChanged || !previousSlide ) { + stopEmbeddedContent( previousSlide ); + startEmbeddedContent( currentSlide ); + } + + // Announce the current slide contents, for screen readers + dom.statusDiv.textContent = currentSlide.textContent; + + updateControls(); + updateProgress(); + updateBackground(); + updateParallax(); + updateSlideNumber(); + + // Update the URL hash + writeURL(); + + cueAutoSlide(); + } - function nt() { - v(), f(), W(), Wr = xr.autoSlide, Dt(), l(), At(), it(), dt(), ct(), ut(!0), lt(), st(), mt(), _() && j() + /** + * Syncs the presentation with the current DOM. Useful + * when new slides or control elements are added or when + * the configuration has changed. + */ + function sync() { + + // Subscribe to input + removeEventListeners(); + addEventListeners(); + + // Force a layout to make sure the current config is accounted for + layout(); + + // Reflect the current autoSlide value + autoSlide = config.autoSlide; + + // Start auto-sliding if it's enabled + cueAutoSlide(); + + // Re-create the slide backgrounds + createBackgrounds(); + + // Write the current hash to the URL + writeURL(); + + sortAllFragments(); + + updateControls(); + updateProgress(); + updateBackground( true ); + updateSlideNumber(); + updateSlidesVisibility(); + + formatEmbeddedContent(); + + if( isOverview() ) { + layoutOverview(); + } + } - function at() { - var e = g(Cr.wrapper.querySelectorAll(Ar)); - e.forEach(function (e) { - var t = g(e.querySelectorAll("section")); - t.forEach(function (e, t) { - t > 0 && (e.classList.remove("present"), e.classList.remove("past"), e.classList.add("future"), e.setAttribute("aria-hidden", "true")) - }) - }) + /** + * Resets all vertical slides so that only the first + * is visible. + */ + function resetVerticalSlides() { + + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + horizontalSlides.forEach( function( horizontalSlide ) { + + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ); + verticalSlides.forEach( function( verticalSlide, y ) { + + if( y > 0 ) { + verticalSlide.classList.remove( 'present' ); + verticalSlide.classList.remove( 'past' ); + verticalSlide.classList.add( 'future' ); + verticalSlide.setAttribute( 'aria-hidden', 'true' ); + } + + } ); + + } ); + } - function it() { - var e = g(Cr.wrapper.querySelectorAll(Ar)); - e.forEach(function (e) { - var t = g(e.querySelectorAll("section")); - t.forEach(function (e) { - Nt(e.querySelectorAll(".fragment")) - }), 0 === t.length && Nt(e.querySelectorAll(".fragment")) - }) + /** + * Sorts and formats all of fragments in the + * presentation. + */ + function sortAllFragments() { + + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + horizontalSlides.forEach( function( horizontalSlide ) { + + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ); + verticalSlides.forEach( function( verticalSlide, y ) { + + sortFragments( verticalSlide.querySelectorAll( '.fragment' ) ); + + } ); + + if( verticalSlides.length === 0 ) sortFragments( horizontalSlide.querySelectorAll( '.fragment' ) ); + + } ); + } - function ot(e, t) { - var r = g(Cr.wrapper.querySelectorAll(e)), n = r.length, a = x(); - if (n) { - xr.loop && (t %= n, 0 > t && (t = n + t)), t = Math.max(Math.min(t, n - 1), 0); - for (var i = 0; n > i; i++) { - var o = r[i], s = xr.rtl && !K(o); - if (o.classList.remove("past"), o.classList.remove("present"), o.classList.remove("future"), o.setAttribute("hidden", ""), o.setAttribute("aria-hidden", "true"), o.querySelector("section") && o.classList.add("stack"), a)o.classList.add("present"); else if (t > i) { - if (o.classList.add(s ? "future" : "past"), xr.fragments)for (var c = g(o.querySelectorAll(".fragment")); c.length;) { - var l = c.pop(); - l.classList.add("visible"), l.classList.remove("current-fragment") + /** + * Updates one dimension of slides by showing the slide + * with the specified index. + * + * @param {String} selector A CSS selector that will fetch + * the group of slides we are working with + * @param {Number} index The index of the slide that should be + * shown + * + * @return {Number} The index of the slide that is now shown, + * might differ from the passed in index if it was out of + * bounds. + */ + function updateSlides( selector, index ) { + + // Select all slides and convert the NodeList result to + // an array + var slides = toArray( dom.wrapper.querySelectorAll( selector ) ), + slidesLength = slides.length; + + var printMode = isPrintingPDF(); + + if( slidesLength ) { + + // Should the index loop? + if( config.loop ) { + index %= slidesLength; + + if( index < 0 ) { + index = slidesLength + index; + } + } + + // Enforce max and minimum index bounds + index = Math.max( Math.min( index, slidesLength - 1 ), 0 ); + + for( var i = 0; i < slidesLength; i++ ) { + var element = slides[i]; + + var reverse = config.rtl && !isVerticalSlide( element ); + + element.classList.remove( 'past' ); + element.classList.remove( 'present' ); + element.classList.remove( 'future' ); + + // http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute + element.setAttribute( 'hidden', '' ); + element.setAttribute( 'aria-hidden', 'true' ); + + // If this element contains vertical slides + if( element.querySelector( 'section' ) ) { + element.classList.add( 'stack' ); + } + + // If we're printing static slides, all slides are "present" + if( printMode ) { + element.classList.add( 'present' ); + continue; + } + + if( i < index ) { + // Any element previous to index is given the 'past' class + element.classList.add( reverse ? 'future' : 'past' ); + + if( config.fragments ) { + var pastFragments = toArray( element.querySelectorAll( '.fragment' ) ); + + // Show all fragments on prior slides + while( pastFragments.length ) { + var pastFragment = pastFragments.pop(); + pastFragment.classList.add( 'visible' ); + pastFragment.classList.remove( 'current-fragment' ); + } } - } else if (i > t && (o.classList.add(s ? "past" : "future"), xr.fragments))for (var d = g(o.querySelectorAll(".fragment.visible")); d.length;) { - var u = d.pop(); - u.classList.remove("visible"), u.classList.remove("current-fragment") } + else if( i > index ) { + // Any element subsequent to index is given the 'future' class + element.classList.add( reverse ? 'past' : 'future' ); + + if( config.fragments ) { + var futureFragments = toArray( element.querySelectorAll( '.fragment.visible' ) ); + + // No fragments in future slides should be visible ahead of time + while( futureFragments.length ) { + var futureFragment = futureFragments.pop(); + futureFragment.classList.remove( 'visible' ); + futureFragment.classList.remove( 'current-fragment' ); + } + } + } } - r[t].classList.add("present"), r[t].removeAttribute("hidden"), r[t].removeAttribute("aria-hidden"); - var p = r[t].getAttribute("data-state"); - p && (Tr = Tr.concat(p.split(" "))) - } else t = 0; - return t + + // Mark the current slide as present + slides[index].classList.add( 'present' ); + slides[index].removeAttribute( 'hidden' ); + slides[index].removeAttribute( 'aria-hidden' ); + + // If this slide has a state associated with it, add it + // onto the current state of the deck + var slideState = slides[index].getAttribute( 'data-state' ); + if( slideState ) { + state = state.concat( slideState.split( ' ' ) ); + } + + } + else { + // Since there are no slides we can't be anywhere beyond the + // zeroth index + index = 0; + } + + return index; + } - function st() { - var e, t, r = g(Cr.wrapper.querySelectorAll(Ar)), n = r.length; - if (n && "undefined" != typeof hr) { - var a = _() ? 10 : xr.viewDistance; - wr && (a = _() ? 6 : 2), x() && (a = Number.MAX_VALUE); - for (var i = 0; n > i; i++) { - var o = r[i], s = g(o.querySelectorAll("section")), c = s.length; - if (e = Math.abs((hr || 0) - i) || 0, xr.loop && (e = Math.abs(((hr || 0) - i) % (n - a)) || 0), a > e ? ft(o) : vt(o), c)for (var l = Y(o), d = 0; c > d; d++) { - var u = s[d]; - t = Math.abs(i === (hr || 0) ? (gr || 0) - d : d - l), a > e + t ? ft(u) : vt(u) + /** + * Optimization method; hide all slides that are far away + * from the present slide. + */ + function updateSlidesVisibility() { + + // Select all slides and convert the NodeList result to + // an array + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ), + horizontalSlidesLength = horizontalSlides.length, + distanceX, + distanceY; + + if( horizontalSlidesLength && typeof indexh !== 'undefined' ) { + + // The number of steps away from the present slide that will + // be visible + var viewDistance = isOverview() ? 10 : config.viewDistance; + + // Limit view distance on weaker devices + if( isMobileDevice ) { + viewDistance = isOverview() ? 6 : 2; + } + + // All slides need to be visible when exporting to PDF + if( isPrintingPDF() ) { + viewDistance = Number.MAX_VALUE; + } + + for( var x = 0; x < horizontalSlidesLength; x++ ) { + var horizontalSlide = horizontalSlides[x]; + + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ), + verticalSlidesLength = verticalSlides.length; + + // Determine how far away this slide is from the present + distanceX = Math.abs( ( indexh || 0 ) - x ) || 0; + + // If the presentation is looped, distance should measure + // 1 between the first and last slides + if( config.loop ) { + distanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0; } + + // Show the horizontal slide if it's within the view distance + if( distanceX < viewDistance ) { + showSlide( horizontalSlide ); + } + else { + hideSlide( horizontalSlide ); + } + + if( verticalSlidesLength ) { + + var oy = getPreviousVerticalIndex( horizontalSlide ); + + for( var y = 0; y < verticalSlidesLength; y++ ) { + var verticalSlide = verticalSlides[y]; + + distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy ); + + if( distanceX + distanceY < viewDistance ) { + showSlide( verticalSlide ); + } + else { + hideSlide( verticalSlide ); + } + } + + } } + } + } - function ct() { - xr.progress && Cr.progressbar && (Cr.progressbar.style.width = wt() * Cr.wrapper.offsetWidth + "px") + /** + * Updates the progress bar to reflect the current slide. + */ + function updateProgress() { + + // Update progress if enabled + if( config.progress && dom.progressbar ) { + + dom.progressbar.style.width = getProgress() * dom.wrapper.offsetWidth + 'px'; + + } + } - function lt() { - if (xr.slideNumber && Cr.slideNumber) { - var e = "c"; - "string" == typeof xr.slideNumber && (e = xr.slideNumber); - var t = St(); - Cr.slideNumber.innerHTML = e.replace(/h/g, hr).replace(/v/g, gr).replace(/c/g, Math.round(wt() * t) + 1).replace(/t/g, t + 1) + /** + * Updates the slide number div to reflect the current slide. + * + * Slide number format can be defined as a string using the + * following variables: + * h: current slide's horizontal index + * v: current slide's vertical index + * c: current slide index (flattened) + * t: total number of slides (flattened) + */ + function updateSlideNumber() { + + // Update slide number if enabled + if( config.slideNumber && dom.slideNumber) { + + // Default to only showing the current slide number + var format = 'c'; + + // Check if a custom slide number format is available + if( typeof config.slideNumber === 'string' ) { + format = config.slideNumber; + } + + var totalSlides = getTotalSlides(); + + dom.slideNumber.innerHTML = format.replace( /h/g, indexh ) + .replace( /v/g, indexv ) + .replace( /c/g, Math.round( getProgress() * totalSlides ) + 1 ) + .replace( /t/g, totalSlides + 1 ); } + } - function dt() { - var e = ht(), t = gt(); - Cr.controlsLeft.concat(Cr.controlsRight).concat(Cr.controlsUp).concat(Cr.controlsDown).concat(Cr.controlsPrev).concat(Cr.controlsNext).forEach(function (e) { - e.classList.remove("enabled"), e.classList.remove("fragmented") - }), e.left && Cr.controlsLeft.forEach(function (e) { - e.classList.add("enabled") - }), e.right && Cr.controlsRight.forEach(function (e) { - e.classList.add("enabled") - }), e.up && Cr.controlsUp.forEach(function (e) { - e.classList.add("enabled") - }), e.down && Cr.controlsDown.forEach(function (e) { - e.classList.add("enabled") - }), (e.left || e.up) && Cr.controlsPrev.forEach(function (e) { - e.classList.add("enabled") - }), (e.right || e.down) && Cr.controlsNext.forEach(function (e) { - e.classList.add("enabled") - }), yr && (t.prev && Cr.controlsPrev.forEach(function (e) { - e.classList.add("fragmented", "enabled") - }), t.next && Cr.controlsNext.forEach(function (e) { - e.classList.add("fragmented", "enabled") - }), K(yr) ? (t.prev && Cr.controlsUp.forEach(function (e) { - e.classList.add("fragmented", "enabled") - }), t.next && Cr.controlsDown.forEach(function (e) { - e.classList.add("fragmented", "enabled") - })) : (t.prev && Cr.controlsLeft.forEach(function (e) { - e.classList.add("fragmented", "enabled") - }), t.next && Cr.controlsRight.forEach(function (e) { - e.classList.add("fragmented", "enabled") - }))) + /** + * Updates the state of all control/navigation arrows. + */ + function updateControls() { + + var routes = availableRoutes(); + var fragments = availableFragments(); + + // Remove the 'enabled' class from all directions + dom.controlsLeft.concat( dom.controlsRight ) + .concat( dom.controlsUp ) + .concat( dom.controlsDown ) + .concat( dom.controlsPrev ) + .concat( dom.controlsNext ).forEach( function( node ) { + node.classList.remove( 'enabled' ); + node.classList.remove( 'fragmented' ); + } ); + + // Add the 'enabled' class to the available routes + if( routes.left ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'enabled' ); } ); + if( routes.right ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'enabled' ); } ); + if( routes.up ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'enabled' ); } ); + if( routes.down ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'enabled' ); } ); + + // Prev/next buttons + if( routes.left || routes.up ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'enabled' ); } ); + if( routes.right || routes.down ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'enabled' ); } ); + + // Highlight fragment directions + if( currentSlide ) { + + // Always apply fragment decorator to prev/next buttons + if( fragments.prev ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } ); + if( fragments.next ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } ); + + // Apply fragment decorators to directional buttons based on + // what slide axis they are in + if( isVerticalSlide( currentSlide ) ) { + if( fragments.prev ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } ); + if( fragments.next ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } ); + } + else { + if( fragments.prev ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } ); + if( fragments.next ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } ); + } + + } + } - function ut(e) { - var t = null, r = xr.rtl ? "future" : "past", n = xr.rtl ? "past" : "future"; - if (g(Cr.background.childNodes).forEach(function (a, i) { - a.classList.remove("past"), a.classList.remove("present"), a.classList.remove("future"), hr > i ? a.classList.add(r) : i > hr ? a.classList.add(n) : (a.classList.add("present"), t = a), (e || i === hr) && g(a.querySelectorAll(".slide-background")).forEach(function (e, r) { - e.classList.remove("past"), e.classList.remove("present"), e.classList.remove("future"), gr > r ? e.classList.add("past") : r > gr ? e.classList.add("future") : (e.classList.add("present"), i === hr && (t = e)) - }) - }), br) { - var a = br.querySelector("video"); - a && a.pause() + /** + * Updates the background elements to reflect the current + * slide. + * + * @param {Boolean} includeAll If true, the backgrounds of + * all vertical slides (not just the present) will be updated. + */ + function updateBackground( includeAll ) { + + var currentBackground = null; + + // Reverse past/future classes when in RTL mode + var horizontalPast = config.rtl ? 'future' : 'past', + horizontalFuture = config.rtl ? 'past' : 'future'; + + // Update the classes of all backgrounds to match the + // states of their slides (past/present/future) + toArray( dom.background.childNodes ).forEach( function( backgroundh, h ) { + + backgroundh.classList.remove( 'past' ); + backgroundh.classList.remove( 'present' ); + backgroundh.classList.remove( 'future' ); + + if( h < indexh ) { + backgroundh.classList.add( horizontalPast ); + } + else if ( h > indexh ) { + backgroundh.classList.add( horizontalFuture ); + } + else { + backgroundh.classList.add( 'present' ); + + // Store a reference to the current background element + currentBackground = backgroundh; + } + + if( includeAll || h === indexh ) { + toArray( backgroundh.querySelectorAll( '.slide-background' ) ).forEach( function( backgroundv, v ) { + + backgroundv.classList.remove( 'past' ); + backgroundv.classList.remove( 'present' ); + backgroundv.classList.remove( 'future' ); + + if( v < indexv ) { + backgroundv.classList.add( 'past' ); + } + else if ( v > indexv ) { + backgroundv.classList.add( 'future' ); + } + else { + backgroundv.classList.add( 'present' ); + + // Only if this is the present horizontal and vertical slide + if( h === indexh ) currentBackground = backgroundv; + } + + } ); + } + + } ); + + // Stop any currently playing video background + if( previousBackground ) { + + var previousVideo = previousBackground.querySelector( 'video' ); + if( previousVideo ) previousVideo.pause(); + } - if (t) { - var i = t.querySelector("video"); - i && (i.currentTime = 0, i.play()); - var o = t.style.backgroundImage || ""; - /\.gif/i.test(o) && (t.style.backgroundImage = "", window.getComputedStyle(t).opacity, t.style.backgroundImage = o); - var s = br ? br.getAttribute("data-background-hash") : null, c = t.getAttribute("data-background-hash"); - c && c === s && t !== br && Cr.background.classList.add("no-transition"), br = t + + if( currentBackground ) { + + // Start video playback + var currentVideo = currentBackground.querySelector( 'video' ); + if( currentVideo ) { + currentVideo.currentTime = 0; + currentVideo.play(); + } + + var backgroundImageURL = currentBackground.style.backgroundImage || ''; + + // Restart GIFs (doesn't work in Firefox) + if( /\.gif/i.test( backgroundImageURL ) ) { + currentBackground.style.backgroundImage = ''; + window.getComputedStyle( currentBackground ).opacity; + currentBackground.style.backgroundImage = backgroundImageURL; + } + + // Don't transition between identical backgrounds. This + // prevents unwanted flicker. + var previousBackgroundHash = previousBackground ? previousBackground.getAttribute( 'data-background-hash' ) : null; + var currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' ); + if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== previousBackground ) { + dom.background.classList.add( 'no-transition' ); + } + + previousBackground = currentBackground; + } - yr && ["has-light-background", "has-dark-background"].forEach(function (e) { - yr.classList.contains(e) ? Cr.wrapper.classList.add(e) : Cr.wrapper.classList.remove(e) - }), setTimeout(function () { - Cr.background.classList.remove("no-transition") - }, 1) + + // If there's a background brightness flag for this slide, + // bubble it to the .reveal container + if( currentSlide ) { + [ 'has-light-background', 'has-dark-background' ].forEach( function( classToBubble ) { + if( currentSlide.classList.contains( classToBubble ) ) { + dom.wrapper.classList.add( classToBubble ); + } + else { + dom.wrapper.classList.remove( classToBubble ); + } + } ); + } + + // Allow the first background to apply without transition + setTimeout( function() { + dom.background.classList.remove( 'no-transition' ); + }, 1 ); + } - function pt() { - if (xr.parallaxBackgroundImage) { - var e, t, r = Cr.wrapper.querySelectorAll(Ar), n = Cr.wrapper.querySelectorAll(Er), a = Cr.background.style.backgroundSize.split(" "); - 1 === a.length ? e = t = parseInt(a[0], 10) : (e = parseInt(a[0], 10), t = parseInt(a[1], 10)); - var i = Cr.background.offsetWidth, o = r.length, s = -(e - i) / (o - 1) * hr, c = Cr.background.offsetHeight, l = n.length, d = l > 1 ? -(t - c) / (l - 1) * gr : 0; - Cr.background.style.backgroundPosition = s + "px " + d + "px" + /** + * Updates the position of the parallax background based + * on the current slide index. + */ + function updateParallax() { + + if( config.parallaxBackgroundImage ) { + + var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ), + verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR ); + + var backgroundSize = dom.background.style.backgroundSize.split( ' ' ), + backgroundWidth, backgroundHeight; + + if( backgroundSize.length === 1 ) { + backgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 ); + } + else { + backgroundWidth = parseInt( backgroundSize[0], 10 ); + backgroundHeight = parseInt( backgroundSize[1], 10 ); + } + + var slideWidth = dom.background.offsetWidth, + horizontalSlideCount = horizontalSlides.length, + horizontalOffsetMultiplier, + horizontalOffset; + + if( typeof config.parallaxBackgroundHorizontal === 'number' ) { + horizontalOffsetMultiplier = config.parallaxBackgroundHorizontal; + } + else { + horizontalOffsetMultiplier = ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ); + } + + horizontalOffset = horizontalOffsetMultiplier * indexh * -1; + + var slideHeight = dom.background.offsetHeight, + verticalSlideCount = verticalSlides.length, + verticalOffsetMultiplier, + verticalOffset; + + if( typeof config.parallaxBackgroundVertical === 'number' ) { + verticalOffsetMultiplier = config.parallaxBackgroundVertical; + } + else { + verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 ); + } + + verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indexv * 1 : 0; + + dom.background.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px'; + } + } - function ft(e) { - e.style.display = "block", g(e.querySelectorAll("img[data-src], video[data-src], audio[data-src], iframe[data-src]")).forEach(function (e) { - e.setAttribute("src", e.getAttribute("data-src")), e.removeAttribute("data-src") - }), g(e.querySelectorAll("video, audio")).forEach(function (e) { - var t = 0; - g(e.querySelectorAll("source[data-src]")).forEach(function (e) { - e.setAttribute("src", e.getAttribute("data-src")), e.removeAttribute("data-src"), t += 1 - }), t > 0 && e.load() - }); - var t = Et(e), r = qt(t.h, t.v); - if (r && (r.style.display = "block", r.hasAttribute("data-loaded") === !1)) { - r.setAttribute("data-loaded", "true"); - var n = e.getAttribute("data-background-image"), a = e.getAttribute("data-background-video"), i = e.getAttribute("data-background-iframe"); - if (n)r.style.backgroundImage = "url(" + n + ")"; else if (a && !Lt()) { - var o = document.createElement("video"); - a.split(",").forEach(function (e) { - o.innerHTML += '<source src="' + e + '">' - }), r.appendChild(o) - } else if (i) { - var s = document.createElement("iframe"); - s.setAttribute("src", i), s.style.width = "100%", s.style.height = "100%", s.style.maxHeight = "100%", s.style.maxWidth = "100%", r.appendChild(s) + /** + * Called when the given slide is within the configured view + * distance. Shows the slide element and loads any content + * that is set to load lazily (data-src). + */ + function showSlide( slide ) { + + // Show the slide element + slide.style.display = 'block'; + + // Media elements with data-src attributes + toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ) ).forEach( function( element ) { + element.setAttribute( 'src', element.getAttribute( 'data-src' ) ); + element.removeAttribute( 'data-src' ); + } ); + + // Media elements with <source> children + toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( media ) { + var sources = 0; + + toArray( media.querySelectorAll( 'source[data-src]' ) ).forEach( function( source ) { + source.setAttribute( 'src', source.getAttribute( 'data-src' ) ); + source.removeAttribute( 'data-src' ); + sources += 1; + } ); + + // If we rewrote sources for this video/audio element, we need + // to manually tell it to load from its new origin + if( sources > 0 ) { + media.load(); } + } ); + + + // Show the corresponding background element + var indices = getIndices( slide ); + var background = getSlideBackground( indices.h, indices.v ); + if( background ) { + background.style.display = 'block'; + + // If the background contains media, load it + if( background.hasAttribute( 'data-loaded' ) === false ) { + background.setAttribute( 'data-loaded', 'true' ); + + var backgroundImage = slide.getAttribute( 'data-background-image' ), + backgroundVideo = slide.getAttribute( 'data-background-video' ), + backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ), + backgroundIframe = slide.getAttribute( 'data-background-iframe' ); + + // Images + if( backgroundImage ) { + background.style.backgroundImage = 'url('+ backgroundImage +')'; + } + // Videos + else if ( backgroundVideo && !isSpeakerNotes() ) { + var video = document.createElement( 'video' ); + + if( backgroundVideoLoop ) { + video.setAttribute( 'loop', '' ); + } + + // Support comma separated lists of video sources + backgroundVideo.split( ',' ).forEach( function( source ) { + video.innerHTML += '<source src="'+ source +'">'; + } ); + + background.appendChild( video ); + } + // Iframes + else if( backgroundIframe ) { + var iframe = document.createElement( 'iframe' ); + iframe.setAttribute( 'src', backgroundIframe ); + iframe.style.width = '100%'; + iframe.style.height = '100%'; + iframe.style.maxHeight = '100%'; + iframe.style.maxWidth = '100%'; + + background.appendChild( iframe ); + } + } } + } - function vt(e) { - e.style.display = "none"; - var t = Et(e), r = qt(t.h, t.v); - r && (r.style.display = "none") + /** + * Called when the given slide is moved outside of the + * configured view distance. + */ + function hideSlide( slide ) { + + // Hide the slide element + slide.style.display = 'none'; + + // Hide the corresponding background element + var indices = getIndices( slide ); + var background = getSlideBackground( indices.h, indices.v ); + if( background ) { + background.style.display = 'none'; + } + } - function ht() { - var e = Cr.wrapper.querySelectorAll(Ar), t = Cr.wrapper.querySelectorAll(Er), r = { - left: hr > 0 || xr.loop, - right: hr < e.length - 1 || xr.loop, - up: gr > 0, - down: gr < t.length - 1 + /** + * Determine what available routes there are for navigation. + * + * @return {Object} containing four booleans: left/right/up/down + */ + function availableRoutes() { + + var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ), + verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR ); + + var routes = { + left: indexh > 0 || config.loop, + right: indexh < horizontalSlides.length - 1 || config.loop, + up: indexv > 0, + down: indexv < verticalSlides.length - 1 }; - if (xr.rtl) { - var n = r.left; - r.left = r.right, r.right = n + + // reverse horizontal controls for rtl + if( config.rtl ) { + var left = routes.left; + routes.left = routes.right; + routes.right = left; } - return r + + return routes; + } - function gt() { - if (yr && xr.fragments) { - var e = yr.querySelectorAll(".fragment"), t = yr.querySelectorAll(".fragment:not(.visible)"); - return {prev: e.length - t.length > 0, next: !!t.length} + /** + * Returns an object describing the available fragment + * directions. + * + * @return {Object} two boolean properties: prev/next + */ + function availableFragments() { + + if( currentSlide && config.fragments ) { + var fragments = currentSlide.querySelectorAll( '.fragment' ); + var hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.visible)' ); + + return { + prev: fragments.length - hiddenFragments.length > 0, + next: !!hiddenFragments.length + }; } - return {prev: !1, next: !1} + else { + return { prev: false, next: false }; + } + } - function mt() { - g(Cr.slides.querySelectorAll('iframe[src*="youtube.com/embed/"]')).forEach(function (e) { - var t = e.getAttribute("src"); - /enablejsapi\=1/gi.test(t) || e.setAttribute("src", t + (/\?/.test(t) ? "&" : "?") + "enablejsapi=1") - }), g(Cr.slides.querySelectorAll('iframe[src*="player.vimeo.com/"]')).forEach(function (e) { - var t = e.getAttribute("src"); - /api\=1/gi.test(t) || e.setAttribute("src", t + (/\?/.test(t) ? "&" : "?") + "api=1") - }) + /** + * Enforces origin-specific format rules for embedded media. + */ + function formatEmbeddedContent() { + + // YouTube frames must include "?enablejsapi=1" + toArray( dom.slides.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { + var src = el.getAttribute( 'src' ); + if( !/enablejsapi\=1/gi.test( src ) ) { + el.setAttribute( 'src', src + ( !/\?/.test( src ) ? '?' : '&' ) + 'enablejsapi=1' ); + } + }); + + // Vimeo frames must include "?api=1" + toArray( dom.slides.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { + var src = el.getAttribute( 'src' ); + if( !/api\=1/gi.test( src ) ) { + el.setAttribute( 'src', src + ( !/\?/.test( src ) ? '?' : '&' ) + 'api=1' ); + } + }); + } - function yt(e) { - e && !Lt() && (g(e.querySelectorAll('img[src$=".gif"]')).forEach(function (e) { - e.setAttribute("src", e.getAttribute("src")) - }), g(e.querySelectorAll("video, audio")).forEach(function (e) { - e.hasAttribute("data-autoplay") && e.play() - }), g(e.querySelectorAll("iframe")).forEach(function (e) { - e.contentWindow.postMessage("slide:start", "*") - }), g(e.querySelectorAll('iframe[src*="youtube.com/embed/"]')).forEach(function (e) { - e.hasAttribute("data-autoplay") && e.contentWindow.postMessage('{"event":"command","func":"playVideo","args":""}', "*") - }), g(e.querySelectorAll('iframe[src*="player.vimeo.com/"]')).forEach(function (e) { - e.hasAttribute("data-autoplay") && e.contentWindow.postMessage('{"method":"play"}', "*") - })) + /** + * Start playback of any embedded content inside of + * the targeted slide. + */ + function startEmbeddedContent( slide ) { + + if( slide && !isSpeakerNotes() ) { + // Restart GIFs + toArray( slide.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) { + // Setting the same unchanged source like this was confirmed + // to work in Chrome, FF & Safari + el.setAttribute( 'src', el.getAttribute( 'src' ) ); + } ); + + // HTML5 media elements + toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + if( el.hasAttribute( 'data-autoplay' ) ) { + el.play(); + } + } ); + + // iframe embeds + toArray( slide.querySelectorAll( 'iframe' ) ).forEach( function( el ) { + el.contentWindow.postMessage( 'slide:start', '*' ); + }); + + // YouTube embeds + toArray( slide.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { + if( el.hasAttribute( 'data-autoplay' ) ) { + el.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' ); + } + }); + + // Vimeo embeds + toArray( slide.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { + if( el.hasAttribute( 'data-autoplay' ) ) { + el.contentWindow.postMessage( '{"method":"play"}', '*' ); + } + }); + } + } - function bt(e) { - e && e.parentNode && (g(e.querySelectorAll("video, audio")).forEach(function (e) { - e.hasAttribute("data-ignore") || e.pause() - }), g(e.querySelectorAll("iframe")).forEach(function (e) { - e.contentWindow.postMessage("slide:stop", "*") - }), g(e.querySelectorAll('iframe[src*="youtube.com/embed/"]')).forEach(function (e) { - e.hasAttribute("data-ignore") || "function" != typeof e.contentWindow.postMessage || e.contentWindow.postMessage('{"event":"command","func":"pauseVideo","args":""}', "*") - }), g(e.querySelectorAll('iframe[src*="player.vimeo.com/"]')).forEach(function (e) { - e.hasAttribute("data-ignore") || "function" != typeof e.contentWindow.postMessage || e.contentWindow.postMessage('{"method":"pause"}', "*") - })) + /** + * Stop playback of any embedded content inside of + * the targeted slide. + */ + function stopEmbeddedContent( slide ) { + + if( slide && slide.parentNode ) { + // HTML5 media elements + toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) ) { + el.pause(); + } + } ); + + // iframe embeds + toArray( slide.querySelectorAll( 'iframe' ) ).forEach( function( el ) { + el.contentWindow.postMessage( 'slide:stop', '*' ); + }); + + // YouTube embeds + toArray( slide.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) { + el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' ); + } + }); + + // Vimeo embeds + toArray( slide.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) { + el.contentWindow.postMessage( '{"method":"pause"}', '*' ); + } + }); + } + } - function wt() { - var e = g(Cr.wrapper.querySelectorAll(Ar)), t = St(), r = 0; - e:for (var n = 0; n < e.length; n++) { - for (var a = e[n], i = g(a.querySelectorAll("section")), o = 0; o < i.length; o++) { - if (i[o].classList.contains("present"))break e; - r++ + /** + * Returns a value ranging from 0-1 that represents + * how far into the presentation we have navigated. + */ + function getProgress() { + + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + + // The number of past and total slides + var totalCount = getTotalSlides(); + var pastCount = 0; + + // Step through all slides and count the past ones + mainLoop: for( var i = 0; i < horizontalSlides.length; i++ ) { + + var horizontalSlide = horizontalSlides[i]; + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ); + + for( var j = 0; j < verticalSlides.length; j++ ) { + + // Stop as soon as we arrive at the present + if( verticalSlides[j].classList.contains( 'present' ) ) { + break mainLoop; + } + + pastCount++; + } - if (a.classList.contains("present"))break; - a.classList.contains("stack") === !1 && r++ + + // Stop as soon as we arrive at the present + if( horizontalSlide.classList.contains( 'present' ) ) { + break; + } + + // Don't count the wrapping section for vertical slides + if( horizontalSlide.classList.contains( 'stack' ) === false ) { + pastCount++; + } + } - if (yr) { - var s = yr.querySelectorAll(".fragment"); - if (s.length > 0) { - var c = yr.querySelectorAll(".fragment.visible"), l = .9; - r += c.length / s.length * l + + if( currentSlide ) { + + var allFragments = currentSlide.querySelectorAll( '.fragment' ); + + // If there are fragments in the current slide those should be + // accounted for in the progress. + if( allFragments.length > 0 ) { + var visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' ); + + // This value represents how big a portion of the slide progress + // that is made up by its fragments (0-1) + var fragmentWeight = 0.9; + + // Add fragment progress to the past slide count + pastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight; } + } - return r / (t - 1) + + return pastCount / ( totalCount - 1 ); + } - function Lt() { - return !!window.location.search.match(/receiver/gi) + /** + * Checks if this presentation is running inside of the + * speaker notes window. + */ + function isSpeakerNotes() { + + return !!window.location.search.match( /receiver/gi ); + } - function kt() { - var e = window.location.hash, t = e.slice(2).split("/"), r = e.replace(/#|\//gi, ""); - if (isNaN(parseInt(t[0], 10)) && r.length) { - var n; - if (/^[a-zA-Z][\w:.-]*$/.test(r) && (n = document.getElementById(r)), n) { - var a = vr.getIndices(n); - rt(a.h, a.v) - } else rt(hr || 0, gr || 0) - } else { - var i = parseInt(t[0], 10) || 0, o = parseInt(t[1], 10) || 0; - (i !== hr || o !== gr) && rt(i, o) + /** + * Reads the current URL (hash) and navigates accordingly. + */ + function readURL() { + + var hash = window.location.hash; + + // Attempt to parse the hash as either an index or name + var bits = hash.slice( 2 ).split( '/' ), + name = hash.replace( /#|\//gi, '' ); + + // If the first bit is invalid and there is a name we can + // assume that this is a named link + if( isNaN( parseInt( bits[0], 10 ) ) && name.length ) { + var element; + + // Ensure the named link is a valid HTML ID attribute + if( /^[a-zA-Z][\w:.-]*$/.test( name ) ) { + // Find the slide with the specified ID + element = document.getElementById( name ); + } + + if( element ) { + // Find the position of the named slide and navigate to it + var indices = Reveal.getIndices( element ); + slide( indices.h, indices.v ); + } + // If the slide doesn't exist, navigate to the current slide + else { + slide( indexh || 0, indexv || 0 ); + } } + else { + // Read the index components of the hash + var h = parseInt( bits[0], 10 ) || 0, + v = parseInt( bits[1], 10 ) || 0; + + if( h !== indexh || v !== indexv ) { + slide( h, v ); + } + } + } - function At(e) { - if (xr.history)if (clearTimeout(Hr), "number" == typeof e)Hr = setTimeout(At, e); - else if (yr) { - var t = "/", r = yr.getAttribute("id"); - r && (r = r.toLowerCase(), r = r.replace(/[^a-zA-Z0-9\-\_\:\.]/g, "")), "string" == typeof r && r.length ? t = "/" + r : ((hr > 0 || gr > 0) && (t += hr), gr > 0 && (t += "/" + gr)), window.location.hash = t + /** + * Updates the page URL (hash) to reflect the current + * state. + * + * @param {Number} delay The time in ms to wait before + * writing the hash + */ + function writeURL( delay ) { + + if( config.history ) { + + // Make sure there's never more than one timeout running + clearTimeout( writeURLTimeout ); + + // If a delay is specified, timeout this call + if( typeof delay === 'number' ) { + writeURLTimeout = setTimeout( writeURL, delay ); + } + else if( currentSlide ) { + var url = '/'; + + // Attempt to create a named link based on the slide's ID + var id = currentSlide.getAttribute( 'id' ); + if( id ) { + id = id.toLowerCase(); + id = id.replace( /[^a-zA-Z0-9\-\_\:\.]/g, '' ); + } + + // If the current slide has an ID, use that as a named link + if( typeof id === 'string' && id.length ) { + url = '/' + id; + } + // Otherwise use the /h/v index + else { + if( indexh > 0 || indexv > 0 ) url += indexh; + if( indexv > 0 ) url += '/' + indexv; + } + + window.location.hash = url; + } } + } - function Et(e) { - var t, r = hr, n = gr; - if (e) { - var a = K(e), i = a ? e.parentNode : e, o = g(Cr.wrapper.querySelectorAll(Ar)); - r = Math.max(o.indexOf(i), 0), n = void 0, a && (n = Math.max(g(e.parentNode.querySelectorAll("section")).indexOf(e), 0)) + /** + * Retrieves the h/v location of the current, or specified, + * slide. + * + * @param {HTMLElement} slide If specified, the returned + * index will be for this slide rather than the currently + * active one + * + * @return {Object} { h: <int>, v: <int>, f: <int> } + */ + function getIndices( slide ) { + + // By default, return the current indices + var h = indexh, + v = indexv, + f; + + // If a slide is specified, return the indices of that slide + if( slide ) { + var isVertical = isVerticalSlide( slide ); + var slideh = isVertical ? slide.parentNode : slide; + + // Select all horizontal slides + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + + // Now that we know which the horizontal slide is, get its index + h = Math.max( horizontalSlides.indexOf( slideh ), 0 ); + + // Assume we're not vertical + v = undefined; + + // If this is a vertical slide, grab the vertical index + if( isVertical ) { + v = Math.max( toArray( slide.parentNode.querySelectorAll( 'section' ) ).indexOf( slide ), 0 ); + } } - if (!e && yr) { - var s = yr.querySelectorAll(".fragment").length > 0; - if (s) { - var c = yr.querySelector(".current-fragment"); - t = c && c.hasAttribute("data-fragment-index") ? parseInt(c.getAttribute("data-fragment-index"), 10) : yr.querySelectorAll(".fragment.visible").length - 1 + + if( !slide && currentSlide ) { + var hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0; + if( hasFragments ) { + var currentFragment = currentSlide.querySelector( '.current-fragment' ); + if( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) { + f = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 ); + } + else { + f = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1; + } } } - return {h: r, v: n, f: t} + + return { h: h, v: v, f: f }; + } - function St() { - return Cr.wrapper.querySelectorAll(kr + ":not(.stack)").length + /** + * Retrieves the total number of slides in this presentation. + */ + function getTotalSlides() { + + return dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack)' ).length; + } - function xt(e, t) { - var r = Cr.wrapper.querySelectorAll(Ar)[e], n = r && r.querySelectorAll("section"); - return n && n.length && "number" == typeof t ? n ? n[t] : void 0 : r + /** + * Returns the slide element matching the specified index. + */ + function getSlide( x, y ) { + + var horizontalSlide = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR )[ x ]; + var verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' ); + + if( verticalSlides && verticalSlides.length && typeof y === 'number' ) { + return verticalSlides ? verticalSlides[ y ] : undefined; + } + + return horizontalSlide; + } - function qt(e, t) { - if (x()) { - var r = xt(e, t); - if (r) { - var n = r.querySelector(".slide-background"); - if (n && n.parentNode === r)return n + /** + * Returns the background element for the given slide. + * All slides, even the ones with no background properties + * defined, have a background element so as long as the + * index is valid an element will be returned. + */ + function getSlideBackground( x, y ) { + + // When printing to PDF the slide backgrounds are nested + // inside of the slides + if( isPrintingPDF() ) { + var slide = getSlide( x, y ); + if( slide ) { + var background = slide.querySelector( '.slide-background' ); + if( background && background.parentNode === slide ) { + return background; + } } - return void 0 + + return undefined; } - var a = Cr.wrapper.querySelectorAll(".backgrounds>.slide-background")[e], i = a && a.querySelectorAll(".slide-background"); - return i && i.length && "number" == typeof t ? i ? i[t] : void 0 : a + + var horizontalBackground = dom.wrapper.querySelectorAll( '.backgrounds>.slide-background' )[ x ]; + var verticalBackgrounds = horizontalBackground && horizontalBackground.querySelectorAll( '.slide-background' ); + + if( verticalBackgrounds && verticalBackgrounds.length && typeof y === 'number' ) { + return verticalBackgrounds ? verticalBackgrounds[ y ] : undefined; + } + + return horizontalBackground; + } - function Mt() { - var e = Et(); - return {indexh: e.h, indexv: e.v, indexf: e.f, paused: G(), overview: _()} + /** + * Retrieves the current state of the presentation as + * an object. This state can then be restored at any + * time. + */ + function getState() { + + var indices = getIndices(); + + return { + indexh: indices.h, + indexv: indices.v, + indexf: indices.f, + paused: isPaused(), + overview: isOverview() + }; + } - function Tt(e) { - if ("object" == typeof e) { - rt(m(e.indexh), m(e.indexv), m(e.indexf)); - var t = m(e.paused), r = m(e.overview); - "boolean" == typeof t && t !== G() && Q(t), "boolean" == typeof r && r !== _() && $(r) + /** + * Restores the presentation to the given state. + * + * @param {Object} state As generated by getState() + */ + function setState( state ) { + + if( typeof state === 'object' ) { + slide( deserialize( state.indexh ), deserialize( state.indexv ), deserialize( state.indexf ) ); + + var pausedFlag = deserialize( state.paused ), + overviewFlag = deserialize( state.overview ); + + if( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) { + togglePause( pausedFlag ); + } + + if( typeof overviewFlag === 'boolean' && overviewFlag !== isOverview() ) { + toggleOverview( overviewFlag ); + } } + } - function Nt(e) { - e = g(e); - var t = [], r = [], n = []; - e.forEach(function (e) { - if (e.hasAttribute("data-fragment-index")) { - var n = parseInt(e.getAttribute("data-fragment-index"), 10); - t[n] || (t[n] = []), t[n].push(e) - } else r.push([e]) - }), t = t.concat(r); - var a = 0; - return t.forEach(function (e) { - e.forEach(function (e) { - n.push(e), e.setAttribute("data-fragment-index", a) - }), a++ - }), n + /** + * Return a sorted fragments list, ordered by an increasing + * "data-fragment-index" attribute. + * + * Fragments will be revealed in the order that they are returned by + * this function, so you can use the index attributes to control the + * order of fragment appearance. + * + * To maintain a sensible default fragment order, fragments are presumed + * to be passed in document order. This function adds a "fragment-index" + * attribute to each node if such an attribute is not already present, + * and sets that attribute to an integer value which is the position of + * the fragment within the fragments list. + */ + function sortFragments( fragments ) { + + fragments = toArray( fragments ); + + var ordered = [], + unordered = [], + sorted = []; + + // Group ordered and unordered elements + fragments.forEach( function( fragment, i ) { + if( fragment.hasAttribute( 'data-fragment-index' ) ) { + var index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 ); + + if( !ordered[index] ) { + ordered[index] = []; + } + + ordered[index].push( fragment ); + } + else { + unordered.push( [ fragment ] ); + } + } ); + + // Append fragments without explicit indices in their + // DOM order + ordered = ordered.concat( unordered ); + + // Manually count the index up per group to ensure there + // are no gaps + var index = 0; + + // Push all fragments in their sorted order to an array, + // this flattens the groups + ordered.forEach( function( group ) { + group.forEach( function( fragment ) { + sorted.push( fragment ); + fragment.setAttribute( 'data-fragment-index', index ); + } ); + + index ++; + } ); + + return sorted; + } - function It(e, t) { - if (yr && xr.fragments) { - var r = Nt(yr.querySelectorAll(".fragment")); - if (r.length) { - if ("number" != typeof e) { - var n = Nt(yr.querySelectorAll(".fragment.visible")).pop(); - e = n ? parseInt(n.getAttribute("data-fragment-index") || 0, 10) : -1 + /** + * Navigate to the specified slide fragment. + * + * @param {Number} index The index of the fragment that + * should be shown, -1 means all are invisible + * @param {Number} offset Integer offset to apply to the + * fragment index + * + * @return {Boolean} true if a change was made in any + * fragments visibility as part of this call + */ + function navigateFragment( index, offset ) { + + if( currentSlide && config.fragments ) { + + var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment' ) ); + if( fragments.length ) { + + // If no index is specified, find the current + if( typeof index !== 'number' ) { + var lastVisibleFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop(); + + if( lastVisibleFragment ) { + index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 ); + } + else { + index = -1; + } } - "number" == typeof t && (e += t); - var a = [], i = []; - return g(r).forEach(function (t, r) { - t.hasAttribute("data-fragment-index") && (r = parseInt(t.getAttribute("data-fragment-index"), 10)), e >= r ? (t.classList.contains("visible") || a.push(t), t.classList.add("visible"), t.classList.remove("current-fragment"), Cr.statusDiv.textContent = t.textContent, r === e && t.classList.add("current-fragment")) : (t.classList.contains("visible") && i.push(t), t.classList.remove("visible"), t.classList.remove("current-fragment")) - }), i.length && T("fragmenthidden", { - fragment: i[0], - fragments: i - }), a.length && T("fragmentshown", { - fragment: a[0], - fragments: a - }), dt(), ct(), !(!a.length && !i.length) + + // If an offset is specified, apply it to the index + if( typeof offset === 'number' ) { + index += offset; + } + + var fragmentsShown = [], + fragmentsHidden = []; + + toArray( fragments ).forEach( function( element, i ) { + + if( element.hasAttribute( 'data-fragment-index' ) ) { + i = parseInt( element.getAttribute( 'data-fragment-index' ), 10 ); + } + + // Visible fragments + if( i <= index ) { + if( !element.classList.contains( 'visible' ) ) fragmentsShown.push( element ); + element.classList.add( 'visible' ); + element.classList.remove( 'current-fragment' ); + + // Announce the fragments one by one to the Screen Reader + dom.statusDiv.textContent = element.textContent; + + if( i === index ) { + element.classList.add( 'current-fragment' ); + } + } + // Hidden fragments + else { + if( element.classList.contains( 'visible' ) ) fragmentsHidden.push( element ); + element.classList.remove( 'visible' ); + element.classList.remove( 'current-fragment' ); + } + + + } ); + + if( fragmentsHidden.length ) { + dispatchEvent( 'fragmenthidden', { fragment: fragmentsHidden[0], fragments: fragmentsHidden } ); + } + + if( fragmentsShown.length ) { + dispatchEvent( 'fragmentshown', { fragment: fragmentsShown[0], fragments: fragmentsShown } ); + } + + updateControls(); + updateProgress(); + + return !!( fragmentsShown.length || fragmentsHidden.length ); + } + } - return !1 + + return false; + } - function Ct() { - return It(null, 1) + /** + * Navigate to the next slide fragment. + * + * @return {Boolean} true if there was a next fragment, + * false otherwise + */ + function nextFragment() { + + return navigateFragment( null, 1 ); + } - function Pt() { - return It(null, -1) + /** + * Navigate to the previous slide fragment. + * + * @return {Boolean} true if there was a previous fragment, + * false otherwise + */ + function previousFragment() { + + return navigateFragment( null, -1 ); + } - function Dt() { - if (Ht(), yr) { - var e = yr.querySelector(".current-fragment"), t = e ? e.getAttribute("data-autoslide") : null, r = yr.parentNode ? yr.parentNode.getAttribute("data-autoslide") : null, n = yr.getAttribute("data-autoslide"); - Wr = t ? parseInt(t, 10) : n ? parseInt(n, 10) : r ? parseInt(r, 10) : xr.autoSlide, g(yr.querySelectorAll("video, audio")).forEach(function (e) { - e.hasAttribute("data-autoplay") && Wr && 1e3 * e.duration > Wr && (Wr = 1e3 * e.duration + 1e3) - }), !Wr || Fr || G() || _() || vr.isLastSlide() && !gt().next && xr.loop !== !0 || (Or = setTimeout(jt, Wr), zr = Date.now()), Lr && Lr.setPlaying(-1 !== Or) + /** + * Cues a new automated slide if enabled in the config. + */ + function cueAutoSlide() { + + cancelAutoSlide(); + + if( currentSlide ) { + + var currentFragment = currentSlide.querySelector( '.current-fragment' ); + + var fragmentAutoSlide = currentFragment ? currentFragment.getAttribute( 'data-autoslide' ) : null; + var parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null; + var slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' ); + + // Pick value in the following priority order: + // 1. Current fragment's data-autoslide + // 2. Current slide's data-autoslide + // 3. Parent slide's data-autoslide + // 4. Global autoSlide setting + if( fragmentAutoSlide ) { + autoSlide = parseInt( fragmentAutoSlide, 10 ); + } + else if( slideAutoSlide ) { + autoSlide = parseInt( slideAutoSlide, 10 ); + } + else if( parentAutoSlide ) { + autoSlide = parseInt( parentAutoSlide, 10 ); + } + else { + autoSlide = config.autoSlide; + } + + // If there are media elements with data-autoplay, + // automatically set the autoSlide duration to the + // length of that media + toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + if( el.hasAttribute( 'data-autoplay' ) ) { + if( autoSlide && el.duration * 1000 > autoSlide ) { + autoSlide = ( el.duration * 1000 ) + 1000; + } + } + } ); + + // Cue the next auto-slide if: + // - There is an autoSlide value + // - Auto-sliding isn't paused by the user + // - The presentation isn't paused + // - The overview isn't active + // - The presentation isn't over + if( autoSlide && !autoSlidePaused && !isPaused() && !isOverview() && ( !Reveal.isLastSlide() || availableFragments().next || config.loop === true ) ) { + autoSlideTimeout = setTimeout( navigateNext, autoSlide ); + autoSlideStartTime = Date.now(); + } + + if( autoSlidePlayer ) { + autoSlidePlayer.setPlaying( autoSlideTimeout !== -1 ); + } + } + } - function Ht() { - clearTimeout(Or), Or = -1 + /** + * Cancels any ongoing request to auto-slide. + */ + function cancelAutoSlide() { + + clearTimeout( autoSlideTimeout ); + autoSlideTimeout = -1; + } - function Rt() { - Wr && !Fr && (Fr = !0, T("autoslidepaused"), clearTimeout(Or), Lr && Lr.setPlaying(!1)) + function pauseAutoSlide() { + + if( autoSlide && !autoSlidePaused ) { + autoSlidePaused = true; + dispatchEvent( 'autoslidepaused' ); + clearTimeout( autoSlideTimeout ); + + if( autoSlidePlayer ) { + autoSlidePlayer.setPlaying( false ); + } + } + } - function Wt() { - Wr && Fr && (Fr = !1, T("autoslideresumed"), Dt()) + function resumeAutoSlide() { + + if( autoSlide && autoSlidePaused ) { + autoSlidePaused = false; + dispatchEvent( 'autoslideresumed' ); + cueAutoSlide(); + } + } - function Ot() { - xr.rtl ? (_() || Ct() === !1) && ht().left && rt(hr + 1) : (_() || Pt() === !1) && ht().left && rt(hr - 1) + function navigateLeft() { + + // Reverse for RTL + if( config.rtl ) { + if( ( isOverview() || nextFragment() === false ) && availableRoutes().left ) { + slide( indexh + 1 ); + } + } + // Normal navigation + else if( ( isOverview() || previousFragment() === false ) && availableRoutes().left ) { + slide( indexh - 1 ); + } + } - function zt() { - xr.rtl ? (_() || Pt() === !1) && ht().right && rt(hr - 1) : (_() || Ct() === !1) && ht().right && rt(hr + 1) + function navigateRight() { + + // Reverse for RTL + if( config.rtl ) { + if( ( isOverview() || previousFragment() === false ) && availableRoutes().right ) { + slide( indexh - 1 ); + } + } + // Normal navigation + else if( ( isOverview() || nextFragment() === false ) && availableRoutes().right ) { + slide( indexh + 1 ); + } + } - function Ft() { - (_() || Pt() === !1) && ht().up && rt(hr, gr - 1) + function navigateUp() { + + // Prioritize hiding fragments + if( ( isOverview() || previousFragment() === false ) && availableRoutes().up ) { + slide( indexh, indexv - 1 ); + } + } - function Yt() { - (_() || Ct() === !1) && ht().down && rt(hr, gr + 1) + function navigateDown() { + + // Prioritize revealing fragments + if( ( isOverview() || nextFragment() === false ) && availableRoutes().down ) { + slide( indexh, indexv + 1 ); + } + } - function Xt() { - if (Pt() === !1)if (ht().up)Ft(); else { - var e; - if (e = xr.rtl ? g(Cr.wrapper.querySelectorAll(Ar + ".future")).pop() : g(Cr.wrapper.querySelectorAll(Ar + ".past")).pop()) { - var t = e.querySelectorAll("section").length - 1 || void 0, r = hr - 1; - rt(r, t) + /** + * Navigates backwards, prioritized in the following order: + * 1) Previous fragment + * 2) Previous vertical slide + * 3) Previous horizontal slide + */ + function navigatePrev() { + + // Prioritize revealing fragments + if( previousFragment() === false ) { + if( availableRoutes().up ) { + navigateUp(); } + else { + // Fetch the previous horizontal slide, if there is one + var previousSlide; + + if( config.rtl ) { + previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.future' ) ).pop(); + } + else { + previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.past' ) ).pop(); + } + + if( previousSlide ) { + var v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined; + var h = indexh - 1; + slide( h, v ); + } + } } + } - function jt() { - Ct() === !1 && (ht().down ? Yt() : xr.rtl ? Ot() : zt()), Dt() + /** + * The reverse of #navigatePrev(). + */ + function navigateNext() { + + // Prioritize revealing fragments + if( nextFragment() === false ) { + if( availableRoutes().down ) { + navigateDown(); + } + else if( config.rtl ) { + navigateLeft(); + } + else { + navigateRight(); + } + } + + // If auto-sliding is enabled we need to cue up + // another timeout + cueAutoSlide(); + } - function Bt() { - xr.autoSlideStoppable && Rt() + + // --------------------------------------------------------------------// + // ----------------------------- EVENTS -------------------------------// + // --------------------------------------------------------------------// + + /** + * Called by all event handlers that are based on user + * input. + */ + function onUserInput( event ) { + + if( config.autoSlideStoppable ) { + pauseAutoSlide(); + } + } - function Ut(e) { - e.shiftKey && 63 === e.charCode && (Cr.overlay ? R() : H(!0)) + /** + * Handler for the document level 'keypress' event. + */ + function onDocumentKeyPress( event ) { + + // Check if the pressed key is question mark + if( event.shiftKey && event.charCode === 63 ) { + if( dom.overlay ) { + closeOverlay(); + } + else { + showHelp( true ); + } + } + } - function $t(e) { - if ("function" == typeof xr.keyboardCondition && xr.keyboardCondition() === !1)return !0; - var t = Fr; - Bt(e); - var r = document.activeElement && "inherit" !== document.activeElement.contentEditable, n = document.activeElement && document.activeElement.tagName && /input|textarea/i.test(document.activeElement.tagName); - if (!(r || n || e.shiftKey && 32 !== e.keyCode || e.altKey || e.ctrlKey || e.metaKey)) { - if (G() && -1 === [66, 190, 191].indexOf(e.keyCode))return !1; - var a = !1; - if ("object" == typeof xr.keyboard)for (var i in xr.keyboard)if (parseInt(i, 10) === e.keyCode) { - var o = xr.keyboard[i]; - "function" == typeof o ? o.apply(null, [e]) : "string" == typeof o && "function" == typeof vr[o] && vr[o].call(), a = !0 + /** + * Handler for the document level 'keydown' event. + */ + function onDocumentKeyDown( event ) { + + // If there's a condition specified and it returns false, + // ignore this event + if( typeof config.keyboardCondition === 'function' && config.keyboardCondition() === false ) { + return true; + } + + // Remember if auto-sliding was paused so we can toggle it + var autoSlideWasPaused = autoSlidePaused; + + onUserInput( event ); + + // Check if there's a focused element that could be using + // the keyboard + var activeElementIsCE = document.activeElement && document.activeElement.contentEditable !== 'inherit'; + var activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName ); + + // Disregard the event if there's a focused element or a + // keyboard modifier key is present + if( activeElementIsCE || activeElementIsInput || (event.shiftKey && event.keyCode !== 32) || event.altKey || event.ctrlKey || event.metaKey ) return; + + // While paused only allow "unpausing" keyboard events (b and .) + if( isPaused() && [66,190,191].indexOf( event.keyCode ) === -1 ) { + return false; + } + + var triggered = false; + + // 1. User defined key bindings + if( typeof config.keyboard === 'object' ) { + + for( var key in config.keyboard ) { + + // Check if this binding matches the pressed key + if( parseInt( key, 10 ) === event.keyCode ) { + + var value = config.keyboard[ key ]; + + // Callback function + if( typeof value === 'function' ) { + value.apply( null, [ event ] ); + } + // String shortcuts to reveal.js API + else if( typeof value === 'string' && typeof Reveal[ value ] === 'function' ) { + Reveal[ value ].call(); + } + + triggered = true; + + } + } - if (a === !1)switch (a = !0, e.keyCode) { - case 80: - case 33: - Xt(); - break; - case 78: - case 34: - jt(); - break; - case 72: - case 37: - Ot(); - break; - case 76: - case 39: - zt(); - break; - case 75: - case 38: - Ft(); - break; - case 74: - case 40: - Yt(); - break; - case 36: - rt(0); - break; - case 35: - rt(Number.MAX_VALUE); - break; - case 32: - _() ? U() : e.shiftKey ? Xt() : jt(); - break; - case 13: - _() ? U() : a = !1; - break; - case 58: - case 59: - case 66: - case 190: - case 191: - Q(); - break; - case 70: - V(); - break; - case 65: - xr.autoSlideStoppable && et(t); - break; + + } + + // 2. System defined key bindings + if( triggered === false ) { + + // Assume true and try to prove false + triggered = true; + + switch( event.keyCode ) { + // p, page up + case 80: case 33: navigatePrev(); break; + // n, page down + case 78: case 34: navigateNext(); break; + // h, left + case 72: case 37: navigateLeft(); break; + // l, right + case 76: case 39: navigateRight(); break; + // k, up + case 75: case 38: navigateUp(); break; + // j, down + case 74: case 40: navigateDown(); break; + // home + case 36: slide( 0 ); break; + // end + case 35: slide( Number.MAX_VALUE ); break; + // space + case 32: isOverview() ? deactivateOverview() : event.shiftKey ? navigatePrev() : navigateNext(); break; + // return + case 13: isOverview() ? deactivateOverview() : triggered = false; break; + // two-spot, semicolon, b, period, Logitech presenter tools "black screen" button + case 58: case 59: case 66: case 190: case 191: togglePause(); break; + // f + case 70: enterFullscreen(); break; + // a + case 65: if ( config.autoSlideStoppable ) toggleAutoSlide( autoSlideWasPaused ); break; default: - a = !1 + triggered = false; } - a ? e.preventDefault && e.preventDefault() : 27 !== e.keyCode && 79 !== e.keyCode || !Pr.transforms3d || (Cr.overlay ? R() : $(), e.preventDefault && e.preventDefault()), Dt() + } + + // If the input resulted in a triggered action we should prevent + // the browsers default behavior + if( triggered ) { + event.preventDefault && event.preventDefault(); + } + // ESC or O key + else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && features.transforms3d ) { + if( dom.overlay ) { + closeOverlay(); + } + else { + toggleOverview(); + } + + event.preventDefault && event.preventDefault(); + } + + // If auto-sliding is enabled we need to cue up + // another timeout + cueAutoSlide(); + } - function _t(e) { - Yr.startX = e.touches[0].clientX, Yr.startY = e.touches[0].clientY, Yr.startCount = e.touches.length, 2 === e.touches.length && xr.overview && (Yr.startSpan = y({ - x: e.touches[1].clientX, - y: e.touches[1].clientY - }, {x: Yr.startX, y: Yr.startY})) + /** + * Handler for the 'touchstart' event, enables support for + * swipe and pinch gestures. + */ + function onTouchStart( event ) { + + touch.startX = event.touches[0].clientX; + touch.startY = event.touches[0].clientY; + touch.startCount = event.touches.length; + + // If there's two touches we need to memorize the distance + // between those two points to detect pinching + if( event.touches.length === 2 && config.overview ) { + touch.startSpan = distanceBetween( { + x: event.touches[1].clientX, + y: event.touches[1].clientY + }, { + x: touch.startX, + y: touch.startY + } ); + } + } - function Kt(e) { - if (Yr.captured)navigator.userAgent.match(/android/gi) && e.preventDefault(); else { - Bt(e); - var t = e.touches[0].clientX, r = e.touches[0].clientY; - if (2 === e.touches.length && 2 === Yr.startCount && xr.overview) { - var n = y({x: e.touches[1].clientX, y: e.touches[1].clientY}, {x: Yr.startX, y: Yr.startY}); - Math.abs(Yr.startSpan - n) > Yr.threshold && (Yr.captured = !0, n < Yr.startSpan ? X() : U()), e.preventDefault() - } else if (1 === e.touches.length && 2 !== Yr.startCount) { - var a = t - Yr.startX, i = r - Yr.startY; - a > Yr.threshold && Math.abs(a) > Math.abs(i) ? (Yr.captured = !0, Ot()) : a < -Yr.threshold && Math.abs(a) > Math.abs(i) ? (Yr.captured = !0, zt()) : i > Yr.threshold ? (Yr.captured = !0, Ft()) : i < -Yr.threshold && (Yr.captured = !0, Yt()), xr.embedded ? (Yr.captured || K(yr)) && e.preventDefault() : e.preventDefault() + /** + * Handler for the 'touchmove' event. + */ + function onTouchMove( event ) { + + // Each touch should only trigger one action + if( !touch.captured ) { + onUserInput( event ); + + var currentX = event.touches[0].clientX; + var currentY = event.touches[0].clientY; + + // If the touch started with two points and still has + // two active touches; test for the pinch gesture + if( event.touches.length === 2 && touch.startCount === 2 && config.overview ) { + + // The current distance in pixels between the two touch points + var currentSpan = distanceBetween( { + x: event.touches[1].clientX, + y: event.touches[1].clientY + }, { + x: touch.startX, + y: touch.startY + } ); + + // If the span is larger than the desire amount we've got + // ourselves a pinch + if( Math.abs( touch.startSpan - currentSpan ) > touch.threshold ) { + touch.captured = true; + + if( currentSpan < touch.startSpan ) { + activateOverview(); + } + else { + deactivateOverview(); + } + } + + event.preventDefault(); + } + // There was only one touch point, look for a swipe + else if( event.touches.length === 1 && touch.startCount !== 2 ) { + + var deltaX = currentX - touch.startX, + deltaY = currentY - touch.startY; + + if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) { + touch.captured = true; + navigateLeft(); + } + else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) { + touch.captured = true; + navigateRight(); + } + else if( deltaY > touch.threshold ) { + touch.captured = true; + navigateUp(); + } + else if( deltaY < -touch.threshold ) { + touch.captured = true; + navigateDown(); + } + + // If we're embedded, only block touch events if they have + // triggered an action + if( config.embedded ) { + if( touch.captured || isVerticalSlide( currentSlide ) ) { + event.preventDefault(); + } + } + // Not embedded? Block them all to avoid needless tossing + // around of the viewport in iOS + else { + event.preventDefault(); + } + + } } - } + // There's a bug with swiping on some Android devices unless + // the default action is always prevented + else if( navigator.userAgent.match( /android/gi ) ) { + event.preventDefault(); + } - function Vt() { - Yr.captured = !1 } - function Zt(e) { - (e.pointerType === e.MSPOINTER_TYPE_TOUCH || "touch" === e.pointerType) && (e.touches = [{ - clientX: e.clientX, - clientY: e.clientY - }], _t(e)) - } + /** + * Handler for the 'touchend' event. + */ + function onTouchEnd( event ) { - function Jt(e) { - (e.pointerType === e.MSPOINTER_TYPE_TOUCH || "touch" === e.pointerType) && (e.touches = [{ - clientX: e.clientX, - clientY: e.clientY - }], Kt(e)) - } + touch.captured = false; - function Qt(e) { - (e.pointerType === e.MSPOINTER_TYPE_TOUCH || "touch" === e.pointerType) && (e.touches = [{ - clientX: e.clientX, - clientY: e.clientY - }], Vt(e)) } - function Gt(e) { - if (Date.now() - Dr > 600) { - Dr = Date.now(); - var t = e.detail || -e.wheelDelta; - t > 0 ? jt() : Xt() + /** + * Convert pointer down to touch start. + */ + function onPointerDown( event ) { + + if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { + event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; + onTouchStart( event ); } - } - function er(e) { - Bt(e), e.preventDefault(); - var t = g(Cr.wrapper.querySelectorAll(Ar)).length, r = Math.floor(e.clientX / Cr.wrapper.offsetWidth * t); - rt(r) } - function tr(e) { - e.preventDefault(), Bt(), Ot() - } + /** + * Convert pointer move to touch move. + */ + function onPointerMove( event ) { - function rr(e) { - e.preventDefault(), Bt(), zt() - } + if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { + event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; + onTouchMove( event ); + } - function nr(e) { - e.preventDefault(), Bt(), Ft() } - function ar(e) { - e.preventDefault(), Bt(), Yt() + /** + * Convert pointer up to touch end. + */ + function onPointerUp( event ) { + + if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { + event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; + onTouchEnd( event ); + } + } - function ir(e) { - e.preventDefault(), Bt(), Xt() + /** + * Handles mouse wheel scrolling, throttled to avoid skipping + * multiple slides. + */ + function onDocumentMouseScroll( event ) { + + if( Date.now() - lastMouseWheelStep > 600 ) { + + lastMouseWheelStep = Date.now(); + + var delta = event.detail || -event.wheelDelta; + if( delta > 0 ) { + navigateNext(); + } + else { + navigatePrev(); + } + + } + } - function or(e) { - e.preventDefault(), Bt(), jt() + /** + * Clicking on the progress bar results in a navigation to the + * closest approximate horizontal slide using this equation: + * + * ( clickX / presentationWidth ) * numberOfSlides + */ + function onProgressClicked( event ) { + + onUserInput( event ); + + event.preventDefault(); + + var slidesTotal = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).length; + var slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal ); + + if( config.rtl ) { + slideIndex = slidesTotal - slideIndex; + } + + slide( slideIndex ); + } - function sr() { - kt() + /** + * Event handler for navigation control buttons. + */ + function onNavigateLeftClicked( event ) { event.preventDefault(); onUserInput(); navigateLeft(); } + function onNavigateRightClicked( event ) { event.preventDefault(); onUserInput(); navigateRight(); } + function onNavigateUpClicked( event ) { event.preventDefault(); onUserInput(); navigateUp(); } + function onNavigateDownClicked( event ) { event.preventDefault(); onUserInput(); navigateDown(); } + function onNavigatePrevClicked( event ) { event.preventDefault(); onUserInput(); navigatePrev(); } + function onNavigateNextClicked( event ) { event.preventDefault(); onUserInput(); navigateNext(); } + + /** + * Handler for the window level 'hashchange' event. + */ + function onWindowHashChange( event ) { + + readURL(); + } - function cr() { - W() + /** + * Handler for the window level 'resize' event. + */ + function onWindowResize( event ) { + + layout(); + } - function lr() { - var e = document.webkitHidden || document.msHidden || document.hidden; - e === !1 && document.activeElement !== document.body && (document.activeElement.blur(), document.body.focus()) + /** + * Handle for the window level 'visibilitychange' event. + */ + function onPageVisibilityChange( event ) { + + var isHidden = document.webkitHidden || + document.msHidden || + document.hidden; + + // If, after clicking a link or similar and we're coming back, + // focus the document.body to ensure we can use keyboard shortcuts + if( isHidden === false && document.activeElement !== document.body ) { + // Not all elements support .blur() - SVGs among them. + if( typeof document.activeElement.blur === 'function' ) { + document.activeElement.blur(); + } + document.body.focus(); + } + } - function dr(e) { - if (Rr && _()) { - e.preventDefault(); - for (var t = e.target; t && !t.nodeName.match(/section/gi);)t = t.parentNode; - if (t && !t.classList.contains("disabled") && (U(), t.nodeName.match(/section/gi))) { - var r = parseInt(t.getAttribute("data-index-h"), 10), n = parseInt(t.getAttribute("data-index-v"), 10); - rt(r, n) + /** + * Invoked when a slide is and we're in the overview. + */ + function onOverviewSlideClicked( event ) { + + // TODO There's a bug here where the event listeners are not + // removed after deactivating the overview. + if( eventsAreBound && isOverview() ) { + event.preventDefault(); + + var element = event.target; + + while( element && !element.nodeName.match( /section/gi ) ) { + element = element.parentNode; } + + if( element && !element.classList.contains( 'disabled' ) ) { + + deactivateOverview(); + + if( element.nodeName.match( /section/gi ) ) { + var h = parseInt( element.getAttribute( 'data-index-h' ), 10 ), + v = parseInt( element.getAttribute( 'data-index-v' ), 10 ); + + slide( h, v ); + } + + } } + } - function ur(e) { - if (e.currentTarget && e.currentTarget.hasAttribute("href")) { - var t = e.currentTarget.getAttribute("href"); - t && (D(t), e.preventDefault()) + /** + * Handles clicks on links that are set to preview in the + * iframe overlay. + */ + function onPreviewLinkClicked( event ) { + + if( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) { + var url = event.currentTarget.getAttribute( 'href' ); + if( url ) { + showPreview( url ); + event.preventDefault(); + } } + } - function pr() { - vr.isLastSlide() && xr.loop === !1 ? (rt(0, 0), Wt()) : Fr ? Wt() : Rt() + /** + * Handles click on the auto-sliding controls element. + */ + function onAutoSlidePlayerClick( event ) { + + // Replay + if( Reveal.isLastSlide() && config.loop === false ) { + slide( 0, 0 ); + resumeAutoSlide(); + } + // Resume + else if( autoSlidePaused ) { + resumeAutoSlide(); + } + // Pause + else { + pauseAutoSlide(); + } + } - function fr(e, t) { - this.diameter = 50, this.thickness = 3, 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.context = this.canvas.getContext("2d"), this.container.appendChild(this.canvas), this.render() + + // --------------------------------------------------------------------// + // ------------------------ PLAYBACK COMPONENT ------------------------// + // --------------------------------------------------------------------// + + + /** + * Constructor for the playback component, which displays + * play/pause/progress controls. + * + * @param {HTMLElement} container The component will append + * itself to this + * @param {Function} progressCheck A method which will be + * called frequently to get the current progress on a range + * of 0-1 + */ + function Playback( container, progressCheck ) { + + // Cosmetics + this.diameter = 50; + this.thickness = 3; + + // Flags if we are currently playing + this.playing = false; + + // Current progress on a 0-1 range + this.progress = 0; + + // Used to loop the animation smoothly + this.progressOffset = 1; + + this.container = container; + this.progressCheck = progressCheck; + + this.canvas = document.createElement( 'canvas' ); + this.canvas.className = 'playback'; + this.canvas.width = this.diameter; + this.canvas.height = this.diameter; + this.context = this.canvas.getContext( '2d' ); + + this.container.appendChild( this.canvas ); + + this.render(); + } - var vr, hr, gr, mr, yr, br, wr, Lr, kr = ".slides section", Ar = ".slides>section", Er = ".slides>section.present>section", Sr = ".slides>section:first-of-type", xr = { - width: 960, - height: 700, - margin: .1, - minScale: .2, - maxScale: 1, - controls: !0, - progress: !0, - slideNumber: !1, - history: !1, - keyboard: !0, - keyboardCondition: null, - overview: !0, - center: !0, - touch: !0, - loop: !1, - rtl: !1, - fragments: !0, - embedded: !1, - help: !0, - pause: !0, - autoSlide: 0, - autoSlideStoppable: !0, - mouseWheel: !1, - rollingLinks: !1, - hideAddressBar: !0, - previewLinks: !1, - postMessage: !0, - postMessageEvents: !1, - focusBodyOnPageVisibilityChange: !0, - transition: "default", - transitionSpeed: "default", - backgroundTransition: "default", - parallaxBackgroundImage: "", - parallaxBackgroundSize: "", - viewDistance: 3, - dependencies: [] - }, qr = !1, Mr = !1, Tr = [], Nr = 1, Ir = { - layout: "", - overview: "" - }, Cr = {}, Pr = {}, Dr = 0, Hr = 0, Rr = !1, Wr = 0, Or = 0, zr = -1, Fr = !1, Yr = { - startX: 0, - startY: 0, - startSpan: 0, - startCount: 0, - captured: !1, - threshold: 40 - }, Xr = { - "N , SPACE": "Next slide", - P: "Previous slide", - "&#8592; , H": "Navigate left", - "&#8594; , L": "Navigate right", - "&#8593; , K": "Navigate up", - "&#8595; , J": "Navigate down", - Home: "First slide", - End: "Last slide", - "B , .": "Pause", - F: "Fullscreen", - "ESC, O": "Slide overview" + Playback.prototype.setPlaying = function( value ) { + + var wasPlaying = this.playing; + + this.playing = value; + + // Start repainting if we weren't already + if( !wasPlaying && this.playing ) { + this.animate(); + } + else { + this.render(); + } + }; - return fr.prototype.setPlaying = function (e) { - var t = this.playing; - this.playing = e, !t && this.playing ? this.animate() : this.render() - }, fr.prototype.animate = function () { - var e = this.progress; - this.progress = this.progressCheck(), e > .8 && this.progress < .2 && (this.progressOffset = this.progress), this.render(), this.playing && Pr.requestAnimationFrameMethod.call(window, this.animate.bind(this)) - }, fr.prototype.render = function () { - var e = this.playing ? this.progress : 0, t = this.diameter / 2 - this.thickness, r = this.diameter / 2, n = this.diameter / 2, a = 14; - this.progressOffset += .1 * (1 - this.progressOffset); - var i = -Math.PI / 2 + 2 * e * Math.PI, o = -Math.PI / 2 + 2 * this.progressOffset * Math.PI; - this.context.save(), this.context.clearRect(0, 0, this.diameter, this.diameter), this.context.beginPath(), this.context.arc(r, n, t + 2, 0, 2 * Math.PI, !1), this.context.fillStyle = "rgba( 0, 0, 0, 0.4 )", this.context.fill(), this.context.beginPath(), this.context.arc(r, n, t, 0, 2 * Math.PI, !1), this.context.lineWidth = this.thickness, this.context.strokeStyle = "#666", this.context.stroke(), this.playing && (this.context.beginPath(), this.context.arc(r, n, t, o, i, !1), this.context.lineWidth = this.thickness, this.context.strokeStyle = "#fff", this.context.stroke()), this.context.translate(r - a / 2, n - a / 2), this.playing ? (this.context.fillStyle = "#fff", this.context.fillRect(0, 0, a / 2 - 2, a), this.context.fillRect(a / 2 + 2, 0, a / 2 - 2, a)) : (this.context.beginPath(), this.context.translate(2, 0), this.context.moveTo(0, 0), this.context.lineTo(a - 2, a / 2), this.context.lineTo(0, a), this.context.fillStyle = "#fff", this.context.fill()), this.context.restore() - }, fr.prototype.on = function (e, t) { - this.canvas.addEventListener(e, t, !1) - }, fr.prototype.off = function (e, t) { - this.canvas.removeEventListener(e, t, !1) - }, fr.prototype.destroy = function () { - this.playing = !1, this.canvas.parentNode && this.container.removeChild(this.canvas) - }, vr = { - initialize: e, - configure: p, - sync: nt, - slide: rt, - left: Ot, - right: zt, - up: Ft, - down: Yt, - prev: Xt, - next: jt, - navigateFragment: It, - prevFragment: Pt, - nextFragment: Ct, - navigateTo: rt, - navigateLeft: Ot, - navigateRight: zt, - navigateUp: Ft, - navigateDown: Yt, - navigatePrev: Xt, - navigateNext: jt, - layout: W, - availableRoutes: ht, - availableFragments: gt, - toggleOverview: $, - togglePause: Q, - toggleAutoSlide: et, - isOverview: _, - isPaused: G, - isAutoSliding: tt, - addEventListeners: f, - removeEventListeners: v, - getState: Mt, - setState: Tt, - getProgress: wt, - getIndices: Et, - getTotalSlides: St, - getSlide: xt, - getSlideBackground: qt, - getPreviousSlide: function () { - return mr + + Playback.prototype.animate = function() { + + var progressBefore = this.progress; + + this.progress = this.progressCheck(); + + // When we loop, offset the progress so that it eases + // smoothly rather than immediately resetting + if( progressBefore > 0.8 && this.progress < 0.2 ) { + this.progressOffset = this.progress; + } + + this.render(); + + if( this.playing ) { + features.requestAnimationFrameMethod.call( window, this.animate.bind( this ) ); + } + + }; + + /** + * Renders the current progress and playback state. + */ + Playback.prototype.render = function() { + + var progress = this.playing ? this.progress : 0, + radius = ( this.diameter / 2 ) - this.thickness, + x = this.diameter / 2, + y = this.diameter / 2, + iconSize = 14; + + // Ease towards 1 + this.progressOffset += ( 1 - this.progressOffset ) * 0.1; + + var endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) ); + var startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) ); + + this.context.save(); + this.context.clearRect( 0, 0, this.diameter, this.diameter ); + + // Solid background color + this.context.beginPath(); + this.context.arc( x, y, radius + 2, 0, Math.PI * 2, false ); + this.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )'; + this.context.fill(); + + // Draw progress track + this.context.beginPath(); + this.context.arc( x, y, radius, 0, Math.PI * 2, false ); + this.context.lineWidth = this.thickness; + this.context.strokeStyle = '#666'; + this.context.stroke(); + + if( this.playing ) { + // Draw progress on top of track + this.context.beginPath(); + this.context.arc( x, y, radius, startAngle, endAngle, false ); + this.context.lineWidth = this.thickness; + this.context.strokeStyle = '#fff'; + this.context.stroke(); + } + + this.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) ); + + // Draw play/pause icons + if( this.playing ) { + this.context.fillStyle = '#fff'; + this.context.fillRect( 0, 0, iconSize / 2 - 2, iconSize ); + this.context.fillRect( iconSize / 2 + 2, 0, iconSize / 2 - 2, iconSize ); + } + else { + this.context.beginPath(); + this.context.translate( 2, 0 ); + this.context.moveTo( 0, 0 ); + this.context.lineTo( iconSize - 2, iconSize / 2 ); + this.context.lineTo( 0, iconSize ); + this.context.fillStyle = '#fff'; + this.context.fill(); + } + + this.context.restore(); + + }; + + Playback.prototype.on = function( type, listener ) { + this.canvas.addEventListener( type, listener, false ); + }; + + Playback.prototype.off = function( type, listener ) { + this.canvas.removeEventListener( type, listener, false ); + }; + + Playback.prototype.destroy = function() { + + this.playing = false; + + if( this.canvas.parentNode ) { + this.container.removeChild( this.canvas ); + } + + }; + + + // --------------------------------------------------------------------// + // ------------------------------- API --------------------------------// + // --------------------------------------------------------------------// + + + Reveal = { + initialize: initialize, + configure: configure, + sync: sync, + + // Navigation methods + slide: slide, + left: navigateLeft, + right: navigateRight, + up: navigateUp, + down: navigateDown, + prev: navigatePrev, + next: navigateNext, + + // Fragment methods + navigateFragment: navigateFragment, + prevFragment: previousFragment, + nextFragment: nextFragment, + + // Deprecated aliases + navigateTo: slide, + navigateLeft: navigateLeft, + navigateRight: navigateRight, + navigateUp: navigateUp, + navigateDown: navigateDown, + navigatePrev: navigatePrev, + navigateNext: navigateNext, + + // Forces an update in slide layout + layout: layout, + + // Returns an object with the available routes as booleans (left/right/top/bottom) + availableRoutes: availableRoutes, + + // Returns an object with the available fragments as booleans (prev/next) + availableFragments: availableFragments, + + // Toggles the overview mode on/off + toggleOverview: toggleOverview, + + // Toggles the "black screen" mode on/off + togglePause: togglePause, + + // Toggles the auto slide mode on/off + toggleAutoSlide: toggleAutoSlide, + + // State checks + isOverview: isOverview, + isPaused: isPaused, + isAutoSliding: isAutoSliding, + + // Adds or removes all internal event listeners (such as keyboard) + addEventListeners: addEventListeners, + removeEventListeners: removeEventListeners, + + // Facility for persisting and restoring the presentation state + getState: getState, + setState: setState, + + // Presentation progress on range of 0-1 + getProgress: getProgress, + + // Returns the indices of the current, or specified, slide + getIndices: getIndices, + + getTotalSlides: getTotalSlides, + + // Returns the slide element at the specified index + getSlide: getSlide, + + // Returns the slide background element at the specified index + getSlideBackground: getSlideBackground, + + // Returns the previous slide element, may be null + getPreviousSlide: function() { + return previousSlide; }, - getCurrentSlide: function () { - return yr + + // Returns the current slide element + getCurrentSlide: function() { + return currentSlide; }, - getScale: function () { - return Nr + + // Returns the current scale of the presentation content + getScale: function() { + return scale; }, - getConfig: function () { - return xr + + // Returns the current configuration object + getConfig: function() { + return config; }, - getQueryHash: function () { - var e = {}; - location.search.replace(/[A-Z0-9]+?=([\w\.%-]*)/gi, function (t) { - e[t.split("=").shift()] = t.split("=").pop() - }); - for (var t in e) { - var r = e[t]; - e[t] = m(unescape(r)) + + // Helper method, retrieves query string as a key/value hash + getQueryHash: function() { + var query = {}; + + location.search.replace( /[A-Z0-9]+?=([\w\.%-]*)/gi, function(a) { + query[ a.split( '=' ).shift() ] = a.split( '=' ).pop(); + } ); + + // Basic deserialization + for( var i in query ) { + var value = query[ i ]; + + query[ i ] = deserialize( unescape( value ) ); } - return e + + return query; }, - isFirstSlide: function () { - return 0 === hr && 0 === gr + + // Returns true if we're currently on the first slide + isFirstSlide: function() { + return ( indexh === 0 && indexv === 0 ); }, - isLastSlide: function () { - return yr ? yr.nextElementSibling ? !1 : K(yr) && yr.parentNode.nextElementSibling ? !1 : !0 : !1 + + // Returns true if we're currently on the last slide + isLastSlide: function() { + if( currentSlide ) { + // Does this slide has next a sibling? + if( currentSlide.nextElementSibling ) return false; + + // If it's vertical, does its parent have a next sibling? + if( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false; + + return true; + } + + return false; }, - isReady: function () { - return qr + + // Checks if reveal.js has been loaded and is ready for use + isReady: function() { + return loaded; }, - addEventListener: function (e, t, r) { - "addEventListener"in window && (Cr.wrapper || document.querySelector(".reveal")).addEventListener(e, t, r) + + // Forward event binding to the reveal DOM element + addEventListener: function( type, listener, useCapture ) { + if( 'addEventListener' in window ) { + ( dom.wrapper || document.querySelector( '.reveal' ) ).addEventListener( type, listener, useCapture ); + } }, - removeEventListener: function (e, t, r) { - "addEventListener"in window && (Cr.wrapper || document.querySelector(".reveal")).removeEventListener(e, t, r) + removeEventListener: function( type, listener, useCapture ) { + if( 'addEventListener' in window ) { + ( dom.wrapper || document.querySelector( '.reveal' ) ).removeEventListener( type, listener, useCapture ); + } }, - triggerKey: function (e) { - $t({keyCode: e}) + + // Programatically triggers a keyboard event + triggerKey: function( keyCode ) { + onDocumentKeyDown( { keyCode: keyCode } ); } - } -}); + }; + + return Reveal; + +})); \ No newline at end of file