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ElementW/black.css

Created June 12, 2017 18:49
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Reveal standalone
Raw
black.css
/**
* Black theme for reveal.js. This is the opposite of the 'white' theme.
*
* By Hakim El Hattab, http://hakim.se
*/
section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
color: #222; }
/*********************************************
* GLOBAL STYLES
*********************************************/
body {
background: #222;
background-color: #222; }
.reveal {
font-family: "Source Sans Pro", Helvetica, sans-serif;
font-size: 42px;
font-weight: normal;
color: #fff; }
::selection {
color: #fff;
background: #bee4fd;
text-shadow: none; }
::-moz-selection {
color: #fff;
background: #bee4fd;
text-shadow: none; }
.reveal .slides > section,
.reveal .slides > section > section {
line-height: 1.3;
font-weight: inherit; }
/*********************************************
* HEADERS
*********************************************/
.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
margin: 0 0 20px 0;
color: #fff;
font-family: "Source Sans Pro", Helvetica, sans-serif;
font-weight: 600;
line-height: 1.2;
letter-spacing: normal;
text-transform: uppercase;
text-shadow: none;
word-wrap: break-word; }
.reveal h1 {
font-size: 2.5em; }
.reveal h2 {
font-size: 1.6em; }
.reveal h3 {
font-size: 1.3em; }
.reveal h4 {
font-size: 1em; }
.reveal h1 {
text-shadow: none; }
/*********************************************
* OTHER
*********************************************/
.reveal p {
margin: 20px 0;
line-height: 1.3; }
/* Ensure certain elements are never larger than the slide itself */
.reveal img,
.reveal video,
.reveal iframe {
max-width: 95%;
max-height: 95%; }
.reveal strong,
.reveal b {
font-weight: bold; }
.reveal em {
font-style: italic; }
.reveal ol,
.reveal dl,
.reveal ul {
display: inline-block;
text-align: left;
margin: 0 0 0 1em; }
.reveal ol {
list-style-type: decimal; }
.reveal ul {
list-style-type: disc; }
.reveal ul ul {
list-style-type: square; }
.reveal ul ul ul {
list-style-type: circle; }
.reveal ul ul,
.reveal ul ol,
.reveal ol ol,
.reveal ol ul {
display: block;
margin-left: 40px; }
.reveal dt {
font-weight: bold; }
.reveal dd {
margin-left: 40px; }
.reveal q,
.reveal blockquote {
quotes: none; }
.reveal blockquote {
display: block;
position: relative;
width: 70%;
margin: 20px auto;
padding: 5px;
font-style: italic;
background: rgba(255, 255, 255, 0.05);
box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
.reveal blockquote p:first-child,
.reveal blockquote p:last-child {
display: inline-block; }
.reveal q {
font-style: italic; }
.reveal pre {
display: block;
position: relative;
width: 90%;
margin: 20px auto;
text-align: left;
font-size: 0.55em;
font-family: monospace;
line-height: 1.2em;
word-wrap: break-word;
box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
.reveal code {
font-family: monospace; }
.reveal pre code {
display: block;
padding: 5px;
overflow: auto;
max-height: 400px;
word-wrap: normal; }
.reveal table {
margin: auto;
border-collapse: collapse;
border-spacing: 0; }
.reveal table th {
font-weight: bold; }
.reveal table th,
.reveal table td {
text-align: left;
padding: 0.2em 0.5em 0.2em 0.5em;
border-bottom: 1px solid; }
.reveal table th[align="center"],
.reveal table td[align="center"] {
text-align: center; }
.reveal table th[align="right"],
.reveal table td[align="right"] {
text-align: right; }
.reveal table tbody tr:last-child th,
.reveal table tbody tr:last-child td {
border-bottom: none; }
.reveal sup {
vertical-align: super; }
.reveal sub {
vertical-align: sub; }
.reveal small {
display: inline-block;
font-size: 0.6em;
line-height: 1.2em;
vertical-align: top; }
.reveal small * {
vertical-align: top; }
/*********************************************
* LINKS
*********************************************/
.reveal a {
color: #42affa;
text-decoration: none;
-webkit-transition: color .15s ease;
-moz-transition: color .15s ease;
transition: color .15s ease; }
.reveal a:hover {
color: #8dcffc;
text-shadow: none;
border: none; }
.reveal .roll span:after {
color: #fff;
background: #068de9; }
/*********************************************
* IMAGES
*********************************************/
.reveal section img {
margin: 15px 0px;
background: rgba(255, 255, 255, 0.12);
border: 4px solid #fff;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
.reveal section img.plain {
border: 0;
box-shadow: none; }
.reveal a img {
-webkit-transition: all .15s linear;
-moz-transition: all .15s linear;
transition: all .15s linear; }
.reveal a:hover img {
background: rgba(255, 255, 255, 0.2);
border-color: #42affa;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
/*********************************************
* NAVIGATION CONTROLS
*********************************************/
.reveal .controls .navigate-left,
.reveal .controls .navigate-left.enabled {
border-right-color: #42affa; }
.reveal .controls .navigate-right,
.reveal .controls .navigate-right.enabled {
border-left-color: #42affa; }
.reveal .controls .navigate-up,
.reveal .controls .navigate-up.enabled {
border-bottom-color: #42affa; }
.reveal .controls .navigate-down,
.reveal .controls .navigate-down.enabled {
border-top-color: #42affa; }
.reveal .controls .navigate-left.enabled:hover {
border-right-color: #8dcffc; }
.reveal .controls .navigate-right.enabled:hover {
border-left-color: #8dcffc; }
.reveal .controls .navigate-up.enabled:hover {
border-bottom-color: #8dcffc; }
.reveal .controls .navigate-down.enabled:hover {
border-top-color: #8dcffc; }
/*********************************************
* PROGRESS BAR
*********************************************/
.reveal .progress {
background: rgba(0, 0, 0, 0.2); }
.reveal .progress span {
background: #42affa;
-webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
Raw
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>reveal.js – The HTML Presentation Framework</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="reveal.css">
<link rel="stylesheet" href="black.css" id="theme">
<!-- Theme used for syntax highlighting of code -->
<!-- <link rel="stylesheet" href="lib/css/zenburn.css"> -->
</head>
<body>
<div class="reveal">
<div class="slides">
<section>
<h1>Reveal.js</h1>
<h3>The HTML Presentation Framework</h3>
<p>
<small>Created by <a href="http://hakim.se">Hakim El Hattab</a> / <a href="http://twitter.com/hakimel">@hakimel</a></small>
</p>
</section>
<section>
<h1>Reveal.js</h1>
<h3>The HTML Presentation Framework</h3>
<p>
<small>Created by <a href="http://hakim.se">Hakim El Hattab</a> / <a href="http://twitter.com/hakimel">@hakimel</a></small>
</p>
</section>
</div>
</div>
<script src="head.min.js"></script>
<script src="reveal.js"></script>
<script>
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
transition: 'slide', // none/fade/slide/convex/concave/zoom
});
</script>
</body>
</html>
Raw
reveal.css
/*!
* reveal.js
* http://lab.hakim.se/reveal-js
* MIT licensed
*
* Copyright (C) 2017 Hakim El Hattab, http://hakim.se
*/
/*********************************************
* RESET STYLES
*********************************************/
html, body, .reveal div, .reveal span, .reveal applet, .reveal object, .reveal iframe,
.reveal h1, .reveal h2, .reveal h3, .reveal h4, .reveal h5, .reveal h6, .reveal p, .reveal blockquote, .reveal pre,
.reveal a, .reveal abbr, .reveal acronym, .reveal address, .reveal big, .reveal cite, .reveal code,
.reveal del, .reveal dfn, .reveal em, .reveal img, .reveal ins, .reveal kbd, .reveal q, .reveal s, .reveal samp,
.reveal small, .reveal strike, .reveal strong, .reveal sub, .reveal sup, .reveal tt, .reveal var,
.reveal b, .reveal u, .reveal center,
.reveal dl, .reveal dt, .reveal dd, .reveal ol, .reveal ul, .reveal li,
.reveal fieldset, .reveal form, .reveal label, .reveal legend,
.reveal table, .reveal caption, .reveal tbody, .reveal tfoot, .reveal thead, .reveal tr, .reveal th, .reveal td,
.reveal article, .reveal aside, .reveal canvas, .reveal details, .reveal embed,
.reveal figure, .reveal figcaption, .reveal footer, .reveal header, .reveal hgroup,
.reveal menu, .reveal nav, .reveal output, .reveal ruby, .reveal section, .reveal summary,
.reveal time, .reveal mark, .reveal audio, .reveal video {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline; }
.reveal article, .reveal aside, .reveal details, .reveal figcaption, .reveal figure,
.reveal footer, .reveal header, .reveal hgroup, .reveal menu, .reveal nav, .reveal section {
display: block; }
/*********************************************
* GLOBAL STYLES
*********************************************/
html,
body {
width: 100%;
height: 100%;
overflow: hidden; }
body {
position: relative;
line-height: 1;
background-color: #fff;
color: #000; }
/*********************************************
* VIEW FRAGMENTS
*********************************************/
.reveal .slides section .fragment {
opacity: 0;
visibility: hidden;
-webkit-transition: all .2s ease;
transition: all .2s ease; }
.reveal .slides section .fragment.visible {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.grow {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.grow.visible {
-webkit-transform: scale(1.3);
transform: scale(1.3); }
.reveal .slides section .fragment.shrink {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.shrink.visible {
-webkit-transform: scale(0.7);
transform: scale(0.7); }
.reveal .slides section .fragment.zoom-in {
-webkit-transform: scale(0.1);
transform: scale(0.1); }
.reveal .slides section .fragment.zoom-in.visible {
-webkit-transform: none;
transform: none; }
.reveal .slides section .fragment.fade-out {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.fade-out.visible {
opacity: 0;
visibility: hidden; }
.reveal .slides section .fragment.semi-fade-out {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.semi-fade-out.visible {
opacity: 0.5;
visibility: inherit; }
.reveal .slides section .fragment.strike {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.strike.visible {
text-decoration: line-through; }
.reveal .slides section .fragment.fade-up {
-webkit-transform: translate(0, 20%);
transform: translate(0, 20%); }
.reveal .slides section .fragment.fade-up.visible {
-webkit-transform: translate(0, 0);
transform: translate(0, 0); }
.reveal .slides section .fragment.fade-down {
-webkit-transform: translate(0, -20%);
transform: translate(0, -20%); }
.reveal .slides section .fragment.fade-down.visible {
-webkit-transform: translate(0, 0);
transform: translate(0, 0); }
.reveal .slides section .fragment.fade-right {
-webkit-transform: translate(-20%, 0);
transform: translate(-20%, 0); }
.reveal .slides section .fragment.fade-right.visible {
-webkit-transform: translate(0, 0);
transform: translate(0, 0); }
.reveal .slides section .fragment.fade-left {
-webkit-transform: translate(20%, 0);
transform: translate(20%, 0); }
.reveal .slides section .fragment.fade-left.visible {
-webkit-transform: translate(0, 0);
transform: translate(0, 0); }
.reveal .slides section .fragment.current-visible {
opacity: 0;
visibility: hidden; }
.reveal .slides section .fragment.current-visible.current-fragment {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.highlight-red,
.reveal .slides section .fragment.highlight-current-red,
.reveal .slides section .fragment.highlight-green,
.reveal .slides section .fragment.highlight-current-green,
.reveal .slides section .fragment.highlight-blue,
.reveal .slides section .fragment.highlight-current-blue {
opacity: 1;
visibility: inherit; }
.reveal .slides section .fragment.highlight-red.visible {
color: #ff2c2d; }
.reveal .slides section .fragment.highlight-green.visible {
color: #17ff2e; }
.reveal .slides section .fragment.highlight-blue.visible {
color: #1b91ff; }
.reveal .slides section .fragment.highlight-current-red.current-fragment {
color: #ff2c2d; }
.reveal .slides section .fragment.highlight-current-green.current-fragment {
color: #17ff2e; }
.reveal .slides section .fragment.highlight-current-blue.current-fragment {
color: #1b91ff; }
/*********************************************
* DEFAULT ELEMENT STYLES
*********************************************/
/* Fixes issue in Chrome where italic fonts did not appear when printing to PDF */
.reveal:after {
content: '';
font-style: italic; }
.reveal iframe {
z-index: 1; }
/** Prevents layering issues in certain browser/transition combinations */
.reveal a {
position: relative; }
.reveal .stretch {
max-width: none;
max-height: none; }
.reveal pre.stretch code {
height: 100%;
max-height: 100%;
box-sizing: border-box; }
/*********************************************
* CONTROLS
*********************************************/
.reveal .controls {
display: none;
position: fixed;
width: 110px;
height: 110px;
z-index: 30;
right: 10px;
bottom: 10px;
-webkit-user-select: none; }
.reveal .controls button {
padding: 0;
position: absolute;
opacity: 0.05;
width: 0;
height: 0;
background-color: transparent;
border: 12px solid transparent;
-webkit-transform: scale(0.9999);
transform: scale(0.9999);
-webkit-transition: all 0.2s ease;
transition: all 0.2s ease;
-webkit-appearance: none;
-webkit-tap-highlight-color: transparent; }
.reveal .controls .enabled {
opacity: 0.7;
cursor: pointer; }
.reveal .controls .enabled:active {
margin-top: 1px; }
.reveal .controls .navigate-left {
top: 42px;
border-right-width: 22px;
border-right-color: #000; }
.reveal .controls .navigate-left.fragmented {
opacity: 0.3; }
.reveal .controls .navigate-right {
left: 74px;
top: 42px;
border-left-width: 22px;
border-left-color: #000; }
.reveal .controls .navigate-right.fragmented {
opacity: 0.3; }
.reveal .controls .navigate-up {
left: 42px;
border-bottom-width: 22px;
border-bottom-color: #000; }
.reveal .controls .navigate-up.fragmented {
opacity: 0.3; }
.reveal .controls .navigate-down {
left: 42px;
top: 74px;
border-top-width: 22px;
border-top-color: #000; }
.reveal .controls .navigate-down.fragmented {
opacity: 0.3; }
/*********************************************
* PROGRESS BAR
*********************************************/
.reveal .progress {
position: fixed;
display: none;
height: 3px;
width: 100%;
bottom: 0;
left: 0;
z-index: 10;
background-color: rgba(0, 0, 0, 0.2); }
.reveal .progress:after {
content: '';
display: block;
position: absolute;
height: 20px;
width: 100%;
top: -20px; }
.reveal .progress span {
display: block;
height: 100%;
width: 0px;
background-color: #000;
-webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
/*********************************************
* SLIDE NUMBER
*********************************************/
.reveal .slide-number {
position: fixed;
display: block;
right: 8px;
bottom: 8px;
z-index: 31;
font-family: Helvetica, sans-serif;
font-size: 12px;
line-height: 1;
color: #fff;
background-color: rgba(0, 0, 0, 0.4);
padding: 5px; }
.reveal .slide-number-delimiter {
margin: 0 3px; }
/*********************************************
* SLIDES
*********************************************/
.reveal {
position: relative;
width: 100%;
height: 100%;
overflow: hidden;
-ms-touch-action: none;
touch-action: none; }
.reveal .slides {
position: absolute;
width: 100%;
height: 100%;
top: 0;
right: 0;
bottom: 0;
left: 0;
margin: auto;
pointer-events: none;
overflow: visible;
z-index: 1;
text-align: center;
-webkit-perspective: 600px;
perspective: 600px;
-webkit-perspective-origin: 50% 40%;
perspective-origin: 50% 40%; }
.reveal .slides > section {
-ms-perspective: 600px; }
.reveal .slides > section,
.reveal .slides > section > section {
display: none;
position: absolute;
width: 100%;
padding: 20px 0px;
pointer-events: auto;
z-index: 10;
-webkit-transform-style: flat;
transform-style: flat;
-webkit-transition: -webkit-transform-origin 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), -webkit-transform 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), visibility 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), opacity 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
transition: transform-origin 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), transform 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), visibility 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), opacity 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
/* Global transition speed settings */
.reveal[data-transition-speed="fast"] .slides section {
-webkit-transition-duration: 400ms;
transition-duration: 400ms; }
.reveal[data-transition-speed="slow"] .slides section {
-webkit-transition-duration: 1200ms;
transition-duration: 1200ms; }
/* Slide-specific transition speed overrides */
.reveal .slides section[data-transition-speed="fast"] {
-webkit-transition-duration: 400ms;
transition-duration: 400ms; }
.reveal .slides section[data-transition-speed="slow"] {
-webkit-transition-duration: 1200ms;
transition-duration: 1200ms; }
.reveal .slides > section.stack {
padding-top: 0;
padding-bottom: 0; }
.reveal .slides > section.present,
.reveal .slides > section > section.present {
display: block;
z-index: 11;
opacity: 1; }
.reveal .slides > section:empty,
.reveal .slides > section > section:empty,
.reveal .slides > section[data-background-interactive],
.reveal .slides > section > section[data-background-interactive] {
pointer-events: none; }
.reveal.center,
.reveal.center .slides,
.reveal.center .slides section {
min-height: 0 !important; }
/* Don't allow interaction with invisible slides */
.reveal .slides > section.future,
.reveal .slides > section > section.future,
.reveal .slides > section.past,
.reveal .slides > section > section.past {
pointer-events: none; }
.reveal.overview .slides > section,
.reveal.overview .slides > section > section {
pointer-events: auto; }
.reveal .slides > section.past,
.reveal .slides > section.future,
.reveal .slides > section > section.past,
.reveal .slides > section > section.future {
opacity: 0; }
/*********************************************
* Mixins for readability of transitions
*********************************************/
/*********************************************
* SLIDE TRANSITION
* Aliased 'linear' for backwards compatibility
*********************************************/
.reveal.slide section {
-webkit-backface-visibility: hidden;
backface-visibility: hidden; }
.reveal .slides > section[data-transition=slide].past,
.reveal .slides > section[data-transition~=slide-out].past,
.reveal.slide .slides > section:not([data-transition]).past {
-webkit-transform: translate(-150%, 0);
transform: translate(-150%, 0); }
.reveal .slides > section[data-transition=slide].future,
.reveal .slides > section[data-transition~=slide-in].future,
.reveal.slide .slides > section:not([data-transition]).future {
-webkit-transform: translate(150%, 0);
transform: translate(150%, 0); }
.reveal .slides > section > section[data-transition=slide].past,
.reveal .slides > section > section[data-transition~=slide-out].past,
.reveal.slide .slides > section > section:not([data-transition]).past {
-webkit-transform: translate(0, -150%);
transform: translate(0, -150%); }
.reveal .slides > section > section[data-transition=slide].future,
.reveal .slides > section > section[data-transition~=slide-in].future,
.reveal.slide .slides > section > section:not([data-transition]).future {
-webkit-transform: translate(0, 150%);
transform: translate(0, 150%); }
.reveal.linear section {
-webkit-backface-visibility: hidden;
backface-visibility: hidden; }
.reveal .slides > section[data-transition=linear].past,
.reveal .slides > section[data-transition~=linear-out].past,
.reveal.linear .slides > section:not([data-transition]).past {
-webkit-transform: translate(-150%, 0);
transform: translate(-150%, 0); }
.reveal .slides > section[data-transition=linear].future,
.reveal .slides > section[data-transition~=linear-in].future,
.reveal.linear .slides > section:not([data-transition]).future {
-webkit-transform: translate(150%, 0);
transform: translate(150%, 0); }
.reveal .slides > section > section[data-transition=linear].past,
.reveal .slides > section > section[data-transition~=linear-out].past,
.reveal.linear .slides > section > section:not([data-transition]).past {
-webkit-transform: translate(0, -150%);
transform: translate(0, -150%); }
.reveal .slides > section > section[data-transition=linear].future,
.reveal .slides > section > section[data-transition~=linear-in].future,
.reveal.linear .slides > section > section:not([data-transition]).future {
-webkit-transform: translate(0, 150%);
transform: translate(0, 150%); }
/*********************************************
* CONVEX TRANSITION
* Aliased 'default' for backwards compatibility
*********************************************/
.reveal .slides section[data-transition=default].stack,
.reveal.default .slides section.stack {
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d; }
.reveal .slides > section[data-transition=default].past,
.reveal .slides > section[data-transition~=default-out].past,
.reveal.default .slides > section:not([data-transition]).past {
-webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0); }
.reveal .slides > section[data-transition=default].future,
.reveal .slides > section[data-transition~=default-in].future,
.reveal.default .slides > section:not([data-transition]).future {
-webkit-transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0); }
.reveal .slides > section > section[data-transition=default].past,
.reveal .slides > section > section[data-transition~=default-out].past,
.reveal.default .slides > section > section:not([data-transition]).past {
-webkit-transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0);
transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0); }
.reveal .slides > section > section[data-transition=default].future,
.reveal .slides > section > section[data-transition~=default-in].future,
.reveal.default .slides > section > section:not([data-transition]).future {
-webkit-transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0);
transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0); }
.reveal .slides section[data-transition=convex].stack,
.reveal.convex .slides section.stack {
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d; }
.reveal .slides > section[data-transition=convex].past,
.reveal .slides > section[data-transition~=convex-out].past,
.reveal.convex .slides > section:not([data-transition]).past {
-webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0); }
.reveal .slides > section[data-transition=convex].future,
.reveal .slides > section[data-transition~=convex-in].future,
.reveal.convex .slides > section:not([data-transition]).future {
-webkit-transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0); }
.reveal .slides > section > section[data-transition=convex].past,
.reveal .slides > section > section[data-transition~=convex-out].past,
.reveal.convex .slides > section > section:not([data-transition]).past {
-webkit-transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0);
transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0); }
.reveal .slides > section > section[data-transition=convex].future,
.reveal .slides > section > section[data-transition~=convex-in].future,
.reveal.convex .slides > section > section:not([data-transition]).future {
-webkit-transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0);
transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0); }
/*********************************************
* CONCAVE TRANSITION
*********************************************/
.reveal .slides section[data-transition=concave].stack,
.reveal.concave .slides section.stack {
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d; }
.reveal .slides > section[data-transition=concave].past,
.reveal .slides > section[data-transition~=concave-out].past,
.reveal.concave .slides > section:not([data-transition]).past {
-webkit-transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0); }
.reveal .slides > section[data-transition=concave].future,
.reveal .slides > section[data-transition~=concave-in].future,
.reveal.concave .slides > section:not([data-transition]).future {
-webkit-transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0); }
.reveal .slides > section > section[data-transition=concave].past,
.reveal .slides > section > section[data-transition~=concave-out].past,
.reveal.concave .slides > section > section:not([data-transition]).past {
-webkit-transform: translate3d(0, -80%, 0) rotateX(-70deg) translate3d(0, -80%, 0);
transform: translate3d(0, -80%, 0) rotateX(-70deg) translate3d(0, -80%, 0); }
.reveal .slides > section > section[data-transition=concave].future,
.reveal .slides > section > section[data-transition~=concave-in].future,
.reveal.concave .slides > section > section:not([data-transition]).future {
-webkit-transform: translate3d(0, 80%, 0) rotateX(70deg) translate3d(0, 80%, 0);
transform: translate3d(0, 80%, 0) rotateX(70deg) translate3d(0, 80%, 0); }
/*********************************************
* ZOOM TRANSITION
*********************************************/
.reveal .slides section[data-transition=zoom],
.reveal.zoom .slides section:not([data-transition]) {
-webkit-transition-timing-function: ease;
transition-timing-function: ease; }
.reveal .slides > section[data-transition=zoom].past,
.reveal .slides > section[data-transition~=zoom-out].past,
.reveal.zoom .slides > section:not([data-transition]).past {
visibility: hidden;
-webkit-transform: scale(16);
transform: scale(16); }
.reveal .slides > section[data-transition=zoom].future,
.reveal .slides > section[data-transition~=zoom-in].future,
.reveal.zoom .slides > section:not([data-transition]).future {
visibility: hidden;
-webkit-transform: scale(0.2);
transform: scale(0.2); }
.reveal .slides > section > section[data-transition=zoom].past,
.reveal .slides > section > section[data-transition~=zoom-out].past,
.reveal.zoom .slides > section > section:not([data-transition]).past {
-webkit-transform: translate(0, -150%);
transform: translate(0, -150%); }
.reveal .slides > section > section[data-transition=zoom].future,
.reveal .slides > section > section[data-transition~=zoom-in].future,
.reveal.zoom .slides > section > section:not([data-transition]).future {
-webkit-transform: translate(0, 150%);
transform: translate(0, 150%); }
/*********************************************
* CUBE TRANSITION
*
* WARNING:
* this is deprecated and will be removed in a
* future version.
*********************************************/
.reveal.cube .slides {
-webkit-perspective: 1300px;
perspective: 1300px; }
.reveal.cube .slides section {
padding: 30px;
min-height: 700px;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
box-sizing: border-box;
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d; }
.reveal.center.cube .slides section {
min-height: 0; }
.reveal.cube .slides section:not(.stack):before {
content: '';
position: absolute;
display: block;
width: 100%;
height: 100%;
left: 0;
top: 0;
background: rgba(0, 0, 0, 0.1);
border-radius: 4px;
-webkit-transform: translateZ(-20px);
transform: translateZ(-20px); }
.reveal.cube .slides section:not(.stack):after {
content: '';
position: absolute;
display: block;
width: 90%;
height: 30px;
left: 5%;
bottom: 0;
background: none;
z-index: 1;
border-radius: 4px;
box-shadow: 0px 95px 25px rgba(0, 0, 0, 0.2);
-webkit-transform: translateZ(-90px) rotateX(65deg);
transform: translateZ(-90px) rotateX(65deg); }
.reveal.cube .slides > section.stack {
padding: 0;
background: none; }
.reveal.cube .slides > section.past {
-webkit-transform-origin: 100% 0%;
transform-origin: 100% 0%;
-webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg);
transform: translate3d(-100%, 0, 0) rotateY(-90deg); }
.reveal.cube .slides > section.future {
-webkit-transform-origin: 0% 0%;
transform-origin: 0% 0%;
-webkit-transform: translate3d(100%, 0, 0) rotateY(90deg);
transform: translate3d(100%, 0, 0) rotateY(90deg); }
.reveal.cube .slides > section > section.past {
-webkit-transform-origin: 0% 100%;
transform-origin: 0% 100%;
-webkit-transform: translate3d(0, -100%, 0) rotateX(90deg);
transform: translate3d(0, -100%, 0) rotateX(90deg); }
.reveal.cube .slides > section > section.future {
-webkit-transform-origin: 0% 0%;
transform-origin: 0% 0%;
-webkit-transform: translate3d(0, 100%, 0) rotateX(-90deg);
transform: translate3d(0, 100%, 0) rotateX(-90deg); }
/*********************************************
* PAGE TRANSITION
*
* WARNING:
* this is deprecated and will be removed in a
* future version.
*********************************************/
.reveal.page .slides {
-webkit-perspective-origin: 0% 50%;
perspective-origin: 0% 50%;
-webkit-perspective: 3000px;
perspective: 3000px; }
.reveal.page .slides section {
padding: 30px;
min-height: 700px;
box-sizing: border-box;
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d; }
.reveal.page .slides section.past {
z-index: 12; }
.reveal.page .slides section:not(.stack):before {
content: '';
position: absolute;
display: block;
width: 100%;
height: 100%;
left: 0;
top: 0;
background: rgba(0, 0, 0, 0.1);
-webkit-transform: translateZ(-20px);
transform: translateZ(-20px); }
.reveal.page .slides section:not(.stack):after {
content: '';
position: absolute;
display: block;
width: 90%;
height: 30px;
left: 5%;
bottom: 0;
background: none;
z-index: 1;
border-radius: 4px;
box-shadow: 0px 95px 25px rgba(0, 0, 0, 0.2);
-webkit-transform: translateZ(-90px) rotateX(65deg); }
.reveal.page .slides > section.stack {
padding: 0;
background: none; }
.reveal.page .slides > section.past {
-webkit-transform-origin: 0% 0%;
transform-origin: 0% 0%;
-webkit-transform: translate3d(-40%, 0, 0) rotateY(-80deg);
transform: translate3d(-40%, 0, 0) rotateY(-80deg); }
.reveal.page .slides > section.future {
-webkit-transform-origin: 100% 0%;
transform-origin: 100% 0%;
-webkit-transform: translate3d(0, 0, 0);
transform: translate3d(0, 0, 0); }
.reveal.page .slides > section > section.past {
-webkit-transform-origin: 0% 0%;
transform-origin: 0% 0%;
-webkit-transform: translate3d(0, -40%, 0) rotateX(80deg);
transform: translate3d(0, -40%, 0) rotateX(80deg); }
.reveal.page .slides > section > section.future {
-webkit-transform-origin: 0% 100%;
transform-origin: 0% 100%;
-webkit-transform: translate3d(0, 0, 0);
transform: translate3d(0, 0, 0); }
/*********************************************
* FADE TRANSITION
*********************************************/
.reveal .slides section[data-transition=fade],
.reveal.fade .slides section:not([data-transition]),
.reveal.fade .slides > section > section:not([data-transition]) {
-webkit-transform: none;
transform: none;
-webkit-transition: opacity 0.5s;
transition: opacity 0.5s; }
.reveal.fade.overview .slides section,
.reveal.fade.overview .slides > section > section {
-webkit-transition: none;
transition: none; }
/*********************************************
* NO TRANSITION
*********************************************/
.reveal .slides section[data-transition=none],
.reveal.none .slides section:not([data-transition]) {
-webkit-transform: none;
transform: none;
-webkit-transition: none;
transition: none; }
/*********************************************
* PAUSED MODE
*********************************************/
.reveal .pause-overlay {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: black;
visibility: hidden;
opacity: 0;
z-index: 100;
-webkit-transition: all 1s ease;
transition: all 1s ease; }
.reveal.paused .pause-overlay {
visibility: visible;
opacity: 1; }
/*********************************************
* FALLBACK
*********************************************/
.no-transforms {
overflow-y: auto; }
.no-transforms .reveal .slides {
position: relative;
width: 80%;
height: auto !important;
top: 0;
left: 50%;
margin: 0;
text-align: center; }
.no-transforms .reveal .controls,
.no-transforms .reveal .progress {
display: none !important; }
.no-transforms .reveal .slides section {
display: block !important;
opacity: 1 !important;
position: relative !important;
height: auto;
min-height: 0;
top: 0;
left: -50%;
margin: 70px 0;
-webkit-transform: none;
transform: none; }
.no-transforms .reveal .slides section section {
left: 0; }
.reveal .no-transition,
.reveal .no-transition * {
-webkit-transition: none !important;
transition: none !important; }
/*********************************************
* PER-SLIDE BACKGROUNDS
*********************************************/
.reveal .backgrounds {
position: absolute;
width: 100%;
height: 100%;
top: 0;
left: 0;
-webkit-perspective: 600px;
perspective: 600px; }
.reveal .slide-background {
display: none;
position: absolute;
width: 100%;
height: 100%;
opacity: 0;
visibility: hidden;
overflow: hidden;
background-color: transparent;
background-position: 50% 50%;
background-repeat: no-repeat;
background-size: cover;
-webkit-transition: all 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
transition: all 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
.reveal .slide-background.stack {
display: block; }
.reveal .slide-background.present {
opacity: 1;
visibility: visible;
z-index: 2; }
.print-pdf .reveal .slide-background {
opacity: 1 !important;
visibility: visible !important; }
/* Video backgrounds */
.reveal .slide-background video {
position: absolute;
width: 100%;
height: 100%;
max-width: none;
max-height: none;
top: 0;
left: 0;
-o-object-fit: cover;
object-fit: cover; }
.reveal .slide-background[data-background-size="contain"] video {
-o-object-fit: contain;
object-fit: contain; }
/* Immediate transition style */
.reveal[data-background-transition=none] > .backgrounds .slide-background,
.reveal > .backgrounds .slide-background[data-background-transition=none] {
-webkit-transition: none;
transition: none; }
/* Slide */
.reveal[data-background-transition=slide] > .backgrounds .slide-background,
.reveal > .backgrounds .slide-background[data-background-transition=slide] {
opacity: 1;
-webkit-backface-visibility: hidden;
backface-visibility: hidden; }
.reveal[data-background-transition=slide] > .backgrounds .slide-background.past,
.reveal > .backgrounds .slide-background.past[data-background-transition=slide] {
-webkit-transform: translate(-100%, 0);
transform: translate(-100%, 0); }
.reveal[data-background-transition=slide] > .backgrounds .slide-background.future,
.reveal > .backgrounds .slide-background.future[data-background-transition=slide] {
-webkit-transform: translate(100%, 0);
transform: translate(100%, 0); }
.reveal[data-background-transition=slide] > .backgrounds .slide-background > .slide-background.past,
.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=slide] {
-webkit-transform: translate(0, -100%);
transform: translate(0, -100%); }
.reveal[data-background-transition=slide] > .backgrounds .slide-background > .slide-background.future,
.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=slide] {
-webkit-transform: translate(0, 100%);
transform: translate(0, 100%); }
/* Convex */
.reveal[data-background-transition=convex] > .backgrounds .slide-background.past,
.reveal > .backgrounds .slide-background.past[data-background-transition=convex] {
opacity: 0;
-webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0); }
.reveal[data-background-transition=convex] > .backgrounds .slide-background.future,
.reveal > .backgrounds .slide-background.future[data-background-transition=convex] {
opacity: 0;
-webkit-transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0); }
.reveal[data-background-transition=convex] > .backgrounds .slide-background > .slide-background.past,
.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=convex] {
opacity: 0;
-webkit-transform: translate3d(0, -100%, 0) rotateX(90deg) translate3d(0, -100%, 0);
transform: translate3d(0, -100%, 0) rotateX(90deg) translate3d(0, -100%, 0); }
.reveal[data-background-transition=convex] > .backgrounds .slide-background > .slide-background.future,
.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=convex] {
opacity: 0;
-webkit-transform: translate3d(0, 100%, 0) rotateX(-90deg) translate3d(0, 100%, 0);
transform: translate3d(0, 100%, 0) rotateX(-90deg) translate3d(0, 100%, 0); }
/* Concave */
.reveal[data-background-transition=concave] > .backgrounds .slide-background.past,
.reveal > .backgrounds .slide-background.past[data-background-transition=concave] {
opacity: 0;
-webkit-transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0); }
.reveal[data-background-transition=concave] > .backgrounds .slide-background.future,
.reveal > .backgrounds .slide-background.future[data-background-transition=concave] {
opacity: 0;
-webkit-transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0); }
.reveal[data-background-transition=concave] > .backgrounds .slide-background > .slide-background.past,
.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=concave] {
opacity: 0;
-webkit-transform: translate3d(0, -100%, 0) rotateX(-90deg) translate3d(0, -100%, 0);
transform: translate3d(0, -100%, 0) rotateX(-90deg) translate3d(0, -100%, 0); }
.reveal[data-background-transition=concave] > .backgrounds .slide-background > .slide-background.future,
.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=concave] {
opacity: 0;
-webkit-transform: translate3d(0, 100%, 0) rotateX(90deg) translate3d(0, 100%, 0);
transform: translate3d(0, 100%, 0) rotateX(90deg) translate3d(0, 100%, 0); }
/* Zoom */
.reveal[data-background-transition=zoom] > .backgrounds .slide-background,
.reveal > .backgrounds .slide-background[data-background-transition=zoom] {
-webkit-transition-timing-function: ease;
transition-timing-function: ease; }
.reveal[data-background-transition=zoom] > .backgrounds .slide-background.past,
.reveal > .backgrounds .slide-background.past[data-background-transition=zoom] {
opacity: 0;
visibility: hidden;
-webkit-transform: scale(16);
transform: scale(16); }
.reveal[data-background-transition=zoom] > .backgrounds .slide-background.future,
.reveal > .backgrounds .slide-background.future[data-background-transition=zoom] {
opacity: 0;
visibility: hidden;
-webkit-transform: scale(0.2);
transform: scale(0.2); }
.reveal[data-background-transition=zoom] > .backgrounds .slide-background > .slide-background.past,
.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=zoom] {
opacity: 0;
visibility: hidden;
-webkit-transform: scale(16);
transform: scale(16); }
.reveal[data-background-transition=zoom] > .backgrounds .slide-background > .slide-background.future,
.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=zoom] {
opacity: 0;
visibility: hidden;
-webkit-transform: scale(0.2);
transform: scale(0.2); }
/* Global transition speed settings */
.reveal[data-transition-speed="fast"] > .backgrounds .slide-background {
-webkit-transition-duration: 400ms;
transition-duration: 400ms; }
.reveal[data-transition-speed="slow"] > .backgrounds .slide-background {
-webkit-transition-duration: 1200ms;
transition-duration: 1200ms; }
/*********************************************
* OVERVIEW
*********************************************/
.reveal.overview {
-webkit-perspective-origin: 50% 50%;
perspective-origin: 50% 50%;
-webkit-perspective: 700px;
perspective: 700px; }
.reveal.overview .slides {
-moz-transform-style: preserve-3d; }
.reveal.overview .slides section {
height: 100%;
top: 0 !important;
opacity: 1 !important;
overflow: hidden;
visibility: visible !important;
cursor: pointer;
box-sizing: border-box; }
.reveal.overview .slides section:hover,
.reveal.overview .slides section.present {
outline: 10px solid rgba(150, 150, 150, 0.4);
outline-offset: 10px; }
.reveal.overview .slides section .fragment {
opacity: 1;
-webkit-transition: none;
transition: none; }
.reveal.overview .slides section:after,
.reveal.overview .slides section:before {
display: none !important; }
.reveal.overview .slides > section.stack {
padding: 0;
top: 0 !important;
background: none;
outline: none;
overflow: visible; }
.reveal.overview .backgrounds {
-webkit-perspective: inherit;
perspective: inherit;
-moz-transform-style: preserve-3d; }
.reveal.overview .backgrounds .slide-background {
opacity: 1;
visibility: visible;
outline: 10px solid rgba(150, 150, 150, 0.1);
outline-offset: 10px; }
.reveal.overview .backgrounds .slide-background.stack {
overflow: visible; }
.reveal.overview .slides section,
.reveal.overview-deactivating .slides section {
-webkit-transition: none;
transition: none; }
.reveal.overview .backgrounds .slide-background,
.reveal.overview-deactivating .backgrounds .slide-background {
-webkit-transition: none;
transition: none; }
/*********************************************
* RTL SUPPORT
*********************************************/
.reveal.rtl .slides,
.reveal.rtl .slides h1,
.reveal.rtl .slides h2,
.reveal.rtl .slides h3,
.reveal.rtl .slides h4,
.reveal.rtl .slides h5,
.reveal.rtl .slides h6 {
direction: rtl;
font-family: sans-serif; }
.reveal.rtl pre,
.reveal.rtl code {
direction: ltr; }
.reveal.rtl ol,
.reveal.rtl ul {
text-align: right; }
.reveal.rtl .progress span {
float: right; }
/*********************************************
* PARALLAX BACKGROUND
*********************************************/
.reveal.has-parallax-background .backgrounds {
-webkit-transition: all 0.8s ease;
transition: all 0.8s ease; }
/* Global transition speed settings */
.reveal.has-parallax-background[data-transition-speed="fast"] .backgrounds {
-webkit-transition-duration: 400ms;
transition-duration: 400ms; }
.reveal.has-parallax-background[data-transition-speed="slow"] .backgrounds {
-webkit-transition-duration: 1200ms;
transition-duration: 1200ms; }
/*********************************************
* LINK PREVIEW OVERLAY
*********************************************/
.reveal .overlay {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 1000;
background: rgba(0, 0, 0, 0.9);
opacity: 0;
visibility: hidden;
-webkit-transition: all 0.3s ease;
transition: all 0.3s ease; }
.reveal .overlay.visible {
opacity: 1;
visibility: visible; }
.reveal .overlay .spinner {
position: absolute;
display: block;
top: 50%;
left: 50%;
width: 32px;
height: 32px;
margin: -16px 0 0 -16px;
z-index: 10;
background-image: url(data:image/gif;base64,R0lGODlhIAAgAPMAAJmZmf%2F%2F%2F6%2Bvr8nJybW1tcDAwOjo6Nvb26ioqKOjo7Ozs%2FLy8vz8%2FAAAAAAAAAAAACH%2FC05FVFNDQVBFMi4wAwEAAAAh%2FhpDcmVhdGVkIHdpdGggYWpheGxvYWQuaW5mbwAh%2BQQJCgAAACwAAAAAIAAgAAAE5xDISWlhperN52JLhSSdRgwVo1ICQZRUsiwHpTJT4iowNS8vyW2icCF6k8HMMBkCEDskxTBDAZwuAkkqIfxIQyhBQBFvAQSDITM5VDW6XNE4KagNh6Bgwe60smQUB3d4Rz1ZBApnFASDd0hihh12BkE9kjAJVlycXIg7CQIFA6SlnJ87paqbSKiKoqusnbMdmDC2tXQlkUhziYtyWTxIfy6BE8WJt5YJvpJivxNaGmLHT0VnOgSYf0dZXS7APdpB309RnHOG5gDqXGLDaC457D1zZ%2FV%2FnmOM82XiHRLYKhKP1oZmADdEAAAh%2BQQJCgAAACwAAAAAIAAgAAAE6hDISWlZpOrNp1lGNRSdRpDUolIGw5RUYhhHukqFu8DsrEyqnWThGvAmhVlteBvojpTDDBUEIFwMFBRAmBkSgOrBFZogCASwBDEY%2FCZSg7GSE0gSCjQBMVG023xWBhklAnoEdhQEfyNqMIcKjhRsjEdnezB%2BA4k8gTwJhFuiW4dokXiloUepBAp5qaKpp6%2BHo7aWW54wl7obvEe0kRuoplCGepwSx2jJvqHEmGt6whJpGpfJCHmOoNHKaHx61WiSR92E4lbFoq%2BB6QDtuetcaBPnW6%2BO7wDHpIiK9SaVK5GgV543tzjgGcghAgAh%2BQQJCgAAACwAAAAAIAAgAAAE7hDISSkxpOrN5zFHNWRdhSiVoVLHspRUMoyUakyEe8PTPCATW9A14E0UvuAKMNAZKYUZCiBMuBakSQKG8G2FzUWox2AUtAQFcBKlVQoLgQReZhQlCIJesQXI5B0CBnUMOxMCenoCfTCEWBsJColTMANldx15BGs8B5wlCZ9Po6OJkwmRpnqkqnuSrayqfKmqpLajoiW5HJq7FL1Gr2mMMcKUMIiJgIemy7xZtJsTmsM4xHiKv5KMCXqfyUCJEonXPN2rAOIAmsfB3uPoAK%2B%2BG%2Bw48edZPK%2BM6hLJpQg484enXIdQFSS1u6UhksENEQAAIfkECQoAAAAsAAAAACAAIAAABOcQyEmpGKLqzWcZRVUQnZYg1aBSh2GUVEIQ2aQOE%2BG%2BcD4ntpWkZQj1JIiZIogDFFyHI0UxQwFugMSOFIPJftfVAEoZLBbcLEFhlQiqGp1Vd140AUklUN3eCA51C1EWMzMCezCBBmkxVIVHBWd3HHl9JQOIJSdSnJ0TDKChCwUJjoWMPaGqDKannasMo6WnM562R5YluZRwur0wpgqZE7NKUm%2BFNRPIhjBJxKZteWuIBMN4zRMIVIhffcgojwCF117i4nlLnY5ztRLsnOk%2BaV%2BoJY7V7m76PdkS4trKcdg0Zc0tTcKkRAAAIfkECQoAAAAsAAAAACAAIAAABO4QyEkpKqjqzScpRaVkXZWQEximw1BSCUEIlDohrft6cpKCk5xid5MNJTaAIkekKGQkWyKHkvhKsR7ARmitkAYDYRIbUQRQjWBwJRzChi9CRlBcY1UN4g0%2FVNB0AlcvcAYHRyZPdEQFYV8ccwR5HWxEJ02YmRMLnJ1xCYp0Y5idpQuhopmmC2KgojKasUQDk5BNAwwMOh2RtRq5uQuPZKGIJQIGwAwGf6I0JXMpC8C7kXWDBINFMxS4DKMAWVWAGYsAdNqW5uaRxkSKJOZKaU3tPOBZ4DuK2LATgJhkPJMgTwKCdFjyPHEnKxFCDhEAACH5BAkKAAAALAAAAAAgACAAAATzEMhJaVKp6s2nIkolIJ2WkBShpkVRWqqQrhLSEu9MZJKK9y1ZrqYK9WiClmvoUaF8gIQSNeF1Er4MNFn4SRSDARWroAIETg1iVwuHjYB1kYc1mwruwXKC9gmsJXliGxc%2BXiUCby9ydh1sOSdMkpMTBpaXBzsfhoc5l58Gm5yToAaZhaOUqjkDgCWNHAULCwOLaTmzswadEqggQwgHuQsHIoZCHQMMQgQGubVEcxOPFAcMDAYUA85eWARmfSRQCdcMe0zeP1AAygwLlJtPNAAL19DARdPzBOWSm1brJBi45soRAWQAAkrQIykShQ9wVhHCwCQCACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiRMDjI0Fd30%2FiI2UA5GSS5UDj2l6NoqgOgN4gksEBgYFf0FDqKgHnyZ9OX8HrgYHdHpcHQULXAS2qKpENRg7eAMLC7kTBaixUYFkKAzWAAnLC7FLVxLWDBLKCwaKTULgEwbLA4hJtOkSBNqITT3xEgfLpBtzE%2FjiuL04RGEBgwWhShRgQExHBAAh%2BQQJCgAAACwAAAAAIAAgAAAE7xDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfZiCqGk5dTESJeaOAlClzsJsqwiJwiqnFrb2nS9kmIcgEsjQydLiIlHehhpejaIjzh9eomSjZR%2BipslWIRLAgMDOR2DOqKogTB9pCUJBagDBXR6XB0EBkIIsaRsGGMMAxoDBgYHTKJiUYEGDAzHC9EACcUGkIgFzgwZ0QsSBcXHiQvOwgDdEwfFs0sDzt4S6BK4xYjkDOzn0unFeBzOBijIm1Dgmg5YFQwsCMjp1oJ8LyIAACH5BAkKAAAALAAAAAAgACAAAATwEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GGl6NoiPOH16iZKNlH6KmyWFOggHhEEvAwwMA0N9GBsEC6amhnVcEwavDAazGwIDaH1ipaYLBUTCGgQDA8NdHz0FpqgTBwsLqAbWAAnIA4FWKdMLGdYGEgraigbT0OITBcg5QwPT4xLrROZL6AuQAPUS7bxLpoWidY0JtxLHKhwwMJBTHgPKdEQAACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GAULDJCRiXo1CpGXDJOUjY%2BYip9DhToJA4RBLwMLCwVDfRgbBAaqqoZ1XBMHswsHtxtFaH1iqaoGNgAIxRpbFAgfPQSqpbgGBqUD1wBXeCYp1AYZ19JJOYgH1KwA4UBvQwXUBxPqVD9L3sbp2BNk2xvvFPJd%2BMFCN6HAAIKgNggY0KtEBAAh%2BQQJCgAAACwAAAAAIAAgAAAE6BDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfYIDMaAFdTESJeaEDAIMxYFqrOUaNW4E4ObYcCXaiBVEgULe0NJaxxtYksjh2NLkZISgDgJhHthkpU4mW6blRiYmZOlh4JWkDqILwUGBnE6TYEbCgevr0N1gH4At7gHiRpFaLNrrq8HNgAJA70AWxQIH1%2BvsYMDAzZQPC9VCNkDWUhGkuE5PxJNwiUK4UfLzOlD4WvzAHaoG9nxPi5d%2BjYUqfAhhykOFwJWiAAAIfkECQoAAAAsAAAAACAAIAAABPAQyElpUqnqzaciSoVkXVUMFaFSwlpOCcMYlErAavhOMnNLNo8KsZsMZItJEIDIFSkLGQoQTNhIsFehRww2CQLKF0tYGKYSg%2BygsZIuNqJksKgbfgIGepNo2cIUB3V1B3IvNiBYNQaDSTtfhhx0CwVPI0UJe0%2Bbm4g5VgcGoqOcnjmjqDSdnhgEoamcsZuXO1aWQy8KAwOAuTYYGwi7w5h%2BKr0SJ8MFihpNbx%2B4Erq7BYBuzsdiH1jCAzoSfl0rVirNbRXlBBlLX%2BBP0XJLAPGzTkAuAOqb0WT5AH7OcdCm5B8TgRwSRKIHQtaLCwg1RAAAOwAAAAAAAAAAAA%3D%3D);
visibility: visible;
opacity: 0.6;
-webkit-transition: all 0.3s ease;
transition: all 0.3s ease; }
.reveal .overlay header {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 40px;
z-index: 2;
border-bottom: 1px solid #222; }
.reveal .overlay header a {
display: inline-block;
width: 40px;
height: 40px;
line-height: 36px;
padding: 0 10px;
float: right;
opacity: 0.6;
box-sizing: border-box; }
.reveal .overlay header a:hover {
opacity: 1; }
.reveal .overlay header a .icon {
display: inline-block;
width: 20px;
height: 20px;
background-position: 50% 50%;
background-size: 100%;
background-repeat: no-repeat; }
.reveal .overlay header a.close .icon {
background-image: url(data:image/png;base64,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); }
.reveal .overlay header a.external .icon {
background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAAcElEQVRYR+2WSQoAIQwEzf8f7XiOMkUQxUPlGkM3hVmiQfQR9GYnH1SsAQlI4DiBqkCMoNb9y2e90IAEJPAcgdznU9+engMaeJ7Azh5Y1U67gAho4DqBqmB1buAf0MB1AlVBek83ZPkmJMGc1wAR+AAqod/B97TRpQAAAABJRU5ErkJggg==); }
.reveal .overlay .viewport {
position: absolute;
display: -webkit-box;
display: -webkit-flex;
display: -ms-flexbox;
display: flex;
top: 40px;
right: 0;
bottom: 0;
left: 0; }
.reveal .overlay.overlay-preview .viewport iframe {
width: 100%;
height: 100%;
max-width: 100%;
max-height: 100%;
border: 0;
opacity: 0;
visibility: hidden;
-webkit-transition: all 0.3s ease;
transition: all 0.3s ease; }
.reveal .overlay.overlay-preview.loaded .viewport iframe {
opacity: 1;
visibility: visible; }
.reveal .overlay.overlay-preview.loaded .viewport-inner {
position: absolute;
z-index: -1;
left: 0;
top: 45%;
width: 100%;
text-align: center;
letter-spacing: normal; }
.reveal .overlay.overlay-preview .x-frame-error {
opacity: 0;
-webkit-transition: opacity 0.3s ease 0.3s;
transition: opacity 0.3s ease 0.3s; }
.reveal .overlay.overlay-preview.loaded .x-frame-error {
opacity: 1; }
.reveal .overlay.overlay-preview.loaded .spinner {
opacity: 0;
visibility: hidden;
-webkit-transform: scale(0.2);
transform: scale(0.2); }
.reveal .overlay.overlay-help .viewport {
overflow: auto;
color: #fff; }
.reveal .overlay.overlay-help .viewport .viewport-inner {
width: 600px;
margin: auto;
padding: 20px 20px 80px 20px;
text-align: center;
letter-spacing: normal; }
.reveal .overlay.overlay-help .viewport .viewport-inner .title {
font-size: 20px; }
.reveal .overlay.overlay-help .viewport .viewport-inner table {
border: 1px solid #fff;
border-collapse: collapse;
font-size: 16px; }
.reveal .overlay.overlay-help .viewport .viewport-inner table th,
.reveal .overlay.overlay-help .viewport .viewport-inner table td {
width: 200px;
padding: 14px;
border: 1px solid #fff;
vertical-align: middle; }
.reveal .overlay.overlay-help .viewport .viewport-inner table th {
padding-top: 20px;
padding-bottom: 20px; }
/*********************************************
* PLAYBACK COMPONENT
*********************************************/
.reveal .playback {
position: fixed;
left: 15px;
bottom: 20px;
z-index: 30;
cursor: pointer;
-webkit-transition: all 400ms ease;
transition: all 400ms ease; }
.reveal.overview .playback {
opacity: 0;
visibility: hidden; }
/*********************************************
* ROLLING LINKS
*********************************************/
.reveal .roll {
display: inline-block;
line-height: 1.2;
overflow: hidden;
vertical-align: top;
-webkit-perspective: 400px;
perspective: 400px;
-webkit-perspective-origin: 50% 50%;
perspective-origin: 50% 50%; }
.reveal .roll:hover {
background: none;
text-shadow: none; }
.reveal .roll span {
display: block;
position: relative;
padding: 0 2px;
pointer-events: none;
-webkit-transition: all 400ms ease;
transition: all 400ms ease;
-webkit-transform-origin: 50% 0%;
transform-origin: 50% 0%;
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d;
-webkit-backface-visibility: hidden;
backface-visibility: hidden; }
.reveal .roll:hover span {
background: rgba(0, 0, 0, 0.5);
-webkit-transform: translate3d(0px, 0px, -45px) rotateX(90deg);
transform: translate3d(0px, 0px, -45px) rotateX(90deg); }
.reveal .roll span:after {
content: attr(data-title);
display: block;
position: absolute;
left: 0;
top: 0;
padding: 0 2px;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
-webkit-transform-origin: 50% 0%;
transform-origin: 50% 0%;
-webkit-transform: translate3d(0px, 110%, 0px) rotateX(-90deg);
transform: translate3d(0px, 110%, 0px) rotateX(-90deg); }
/*********************************************
* SPEAKER NOTES
*********************************************/
.reveal aside.notes {
display: none; }
.reveal .speaker-notes {
display: none;
position: absolute;
width: 70%;
max-height: 15%;
left: 15%;
bottom: 26px;
padding: 10px;
z-index: 1;
font-size: 18px;
line-height: 1.4;
color: #fff;
background-color: rgba(0, 0, 0, 0.5);
overflow: auto;
box-sizing: border-box;
text-align: left;
font-family: Helvetica, sans-serif;
-webkit-overflow-scrolling: touch; }
.reveal .speaker-notes.visible:not(:empty) {
display: block; }
@media screen and (max-width: 1024px) {
.reveal .speaker-notes {
font-size: 14px; } }
@media screen and (max-width: 600px) {
.reveal .speaker-notes {
width: 90%;
left: 5%; } }
/*********************************************
* ZOOM PLUGIN
*********************************************/
.zoomed .reveal *,
.zoomed .reveal *:before,
.zoomed .reveal *:after {
-webkit-backface-visibility: visible !important;
backface-visibility: visible !important; }
.zoomed .reveal .progress,
.zoomed .reveal .controls {
opacity: 0; }
.zoomed .reveal .roll span {
background: none; }
.zoomed .reveal .roll span:after {
visibility: hidden; }
Raw
reveal.js
/*!
* reveal.js
* http://lab.hakim.se/reveal-js
* MIT licensed
*
* Copyright (C) 2017 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;
// The reveal.js version
var VERSION = '3.5.0';
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',
UA = navigator.userAgent,
// Configuration 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: 0.04,
// Bounds for smallest/largest possible scale to apply to content
minScale: 0.2,
maxScale: 2.0,
// 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,
// Determine which displays to show the slide number on
showSlideNumber: 'all',
// 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,
// Randomizes the order of slides each time the presentation loads
shuffle: 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 question-mark
// key is pressed
help: true,
// Flags if it should be possible to pause the presentation (blackout)
pause: true,
// Flags if speaker notes should be visible to all viewers
showNotes: false,
// Global override for autolaying embedded media (video/audio/iframe)
// - null: Media will only autoplay if data-autoplay is present
// - true: All media will autoplay, regardless of individual setting
// - false: No media will autoplay, regardless of individual setting
autoPlayMedia: null,
// 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,
// Use this method for navigation when auto-sliding (defaults to navigateNext)
autoSlideMethod: null,
// 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 visibility 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,
// The maximum number of pages a single slide can expand onto when printing
// to PDF, unlimited by default
pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
// Offset used to reduce the height of content within exported PDF pages.
// This exists to account for environment differences based on how you
// print to PDF. CLI printing options, like phantomjs and wkpdf, can end
// on precisely the total height of the document whereas in-browser
// printing has to end one pixel before.
pdfPageHeightOffset: -1,
// Number of slides away from the current that are visible
viewDistance: 3,
// The display mode that will be used to show slides
display: 'block',
// Script dependencies to load
dependencies: []
},
// Flags if Reveal.initialize() has been called
initialized = false,
// Flags if reveal.js is loaded (has dispatched the 'ready' event)
loaded = false,
// Flags if the overview mode is currently active
overview = false,
// Holds the dimensions of our overview slides, including margins
overviewSlideWidth = null,
overviewSlideHeight = null,
// 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,
// Client is a desktop Chrome, see #checkCapabilities()
isChrome,
// 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 ) {
// Make sure we only initialize once
if( initialized === true ) return;
initialized = true;
checkCapabilities();
if( !features.transforms2d && !features.transforms3d ) {
document.body.setAttribute( 'class', 'no-transforms' );
// Since JS won't be running any further, we load all lazy
// loading elements upfront
var images = toArray( document.getElementsByTagName( 'img' ) ),
iframes = toArray( document.getElementsByTagName( 'iframe' ) );
var lazyLoadable = images.concat( iframes );
for( var i = 0, len = lazyLoadable.length; i < len; i++ ) {
var element = lazyLoadable[i];
if( element.getAttribute( 'data-src' ) ) {
element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
element.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();
}
/**
* Inspect the client to see what it's capable of, this
* should only happens once per runtime.
*/
function checkCapabilities() {
isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( UA );
isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
var testElement = document.createElement( 'div' );
features.transforms3d = 'WebkitPerspective' in testElement.style ||
'MozPerspective' in testElement.style ||
'msPerspective' in testElement.style ||
'OPerspective' in testElement.style ||
'perspective' in testElement.style;
features.transforms2d = 'WebkitTransform' in testElement.style ||
'MozTransform' in testElement.style ||
'msTransform' in testElement.style ||
'OTransform' in testElement.style ||
'transform' in testElement.style;
features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function';
features.canvas = !!document.createElement( 'canvas' ).getContext;
// Transitions in the overview are disabled in desktop and
// Safari due to lag
features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( UA );
// Flags if we should use zoom instead of transform to scale
// up slides. Zoom produces crisper results but has a lot of
// xbrowser quirks so we only use it in whitelsited browsers.
features.zoom = 'zoom' in testElement.style && !isMobileDevice &&
( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
}
/**
* 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 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 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 );
}
}
if( scripts.length ) {
scriptsToPreload = scripts.length;
// Load synchronous scripts
head.js.apply( null, scripts );
}
else {
proceed();
}
}
/**
* 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 the slides from being scrolled out of view
setupScrollPrevention();
// 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;
dom.wrapper.classList.add( 'ready' );
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 );
}
}
}
/**
* 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',
'<button class="navigate-left" aria-label="previous slide"></button>' +
'<button class="navigate-right" aria-label="next slide"></button>' +
'<button class="navigate-up" aria-label="above slide"></button>' +
'<button class="navigate-down" aria-label="below slide"></button>' );
// Slide number
dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' );
// Element containing notes that are visible to the audience
dom.speakerNotes = createSingletonNode( dom.wrapper, 'div', 'speaker-notes', null );
dom.speakerNotes.setAttribute( 'data-prevent-swipe', '' );
dom.speakerNotes.setAttribute( 'tabindex', '0' );
// 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.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();
}
/**
* 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.
*
* @return {HTMLElement}
*/
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;
}
/**
* Converts the given HTML element into a string of text
* that can be announced to a screen reader. Hidden
* elements are excluded.
*/
function getStatusText( node ) {
var text = '';
// Text node
if( node.nodeType === 3 ) {
text += node.textContent;
}
// Element node
else if( node.nodeType === 1 ) {
var isAriaHidden = node.getAttribute( 'aria-hidden' );
var isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
if( isAriaHidden !== 'true' && !isDisplayHidden ) {
toArray( node.childNodes ).forEach( function( child ) {
text += getStatusText( child );
} );
}
}
return text;
}
/**
* 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: 0px;}' );
// 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';
// Make sure stretch elements fit on slide
layoutSlideContents( slideWidth, slideHeight );
// Add each slide's index as attributes on itself, we need these
// indices to generate slide numbers below
toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
hslide.setAttribute( 'data-index-h', h );
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 );
} );
}
} );
// 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 = slide.scrollHeight;
var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
// Adhere to configured pages per slide limit
numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
// Center slides vertically
if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
}
// Wrap the slide in a page element and hide its overflow
// so that no page ever flows onto another
var page = document.createElement( 'div' );
page.className = 'pdf-page';
page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
slide.parentNode.insertBefore( page, slide );
page.appendChild( slide );
// Position the slide inside of the page
slide.style.left = left + 'px';
slide.style.top = top + 'px';
slide.style.width = slideWidth + 'px';
if( slide.slideBackgroundElement ) {
page.insertBefore( slide.slideBackgroundElement, slide );
}
// Inject notes if `showNotes` is enabled
if( config.showNotes ) {
// Are there notes for this slide?
var notes = getSlideNotes( slide );
if( notes ) {
var notesSpacing = 8;
var notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
var notesElement = document.createElement( 'div' );
notesElement.classList.add( 'speaker-notes' );
notesElement.classList.add( 'speaker-notes-pdf' );
notesElement.setAttribute( 'data-layout', notesLayout );
notesElement.innerHTML = notes;
if( notesLayout === 'separate-page' ) {
page.parentNode.insertBefore( notesElement, page.nextSibling );
}
else {
notesElement.style.left = notesSpacing + 'px';
notesElement.style.bottom = notesSpacing + 'px';
notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
page.appendChild( notesElement );
}
}
}
// Inject slide numbers if `slideNumbers` are enabled
if( config.slideNumber && /all|print/i.test( config.showSlideNumber ) ) {
var slideNumberH = parseInt( slide.getAttribute( 'data-index-h' ), 10 ) + 1,
slideNumberV = parseInt( slide.getAttribute( 'data-index-v' ), 10 ) + 1;
var numberElement = document.createElement( 'div' );
numberElement.classList.add( 'slide-number' );
numberElement.classList.add( 'slide-number-pdf' );
numberElement.innerHTML = formatSlideNumber( slideNumberH, '.', slideNumberV );
page.appendChild( numberElement );
}
}
} );
// Show all fragments
toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' .fragment' ) ).forEach( function( fragment ) {
fragment.classList.add( 'visible' );
} );
// Notify subscribers that the PDF layout is good to go
dispatchEvent( 'pdf-ready' );
}
/**
* This is an unfortunate necessity. Some actions – such as
* an input field being focused in an iframe or using the
* keyboard to expand text selection beyond the bounds of
* a slide – can trigger our content to be pushed out of view.
* This scrolling can not be prevented by hiding overflow in
* CSS (we already do) so we have to resort to repeatedly
* checking if the slides have been offset :(
*/
function setupScrollPrevention() {
setInterval( function() {
if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
dom.wrapper.scrollTop = 0;
dom.wrapper.scrollLeft = 0;
}
}, 1000 );
}
/**
* Creates an HTML element and returns a reference to it.
* If the element already exists the existing instance will
* be returned.
*
* @param {HTMLElement} container
* @param {string} tagname
* @param {string} classname
* @param {string} innerHTML
*
* @return {HTMLElement}
*/
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;
}
}
// 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;
}
/**
* 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 = createBackground( slideh, dom.background );
// Iterate over all vertical slides
toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) {
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' );
}
}
/**
* Creates a background for the given slide.
*
* @param {HTMLElement} slide
* @param {HTMLElement} container The element that the background
* should be appended to
* @return {HTMLElement} New background div
*/
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;
}
}
// 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.backgroundSize ) element.setAttribute( 'data-background-size', 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' );
slide.slideBackgroundElement = element;
// 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 computedBackgroundStyle = window.getComputedStyle( element );
if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
var rgb = colorToRgb( computedBackgroundStyle.backgroundColor );
// 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( computedBackgroundStyle.backgroundColor ) < 128 ) {
slide.classList.add( 'has-dark-background' );
}
else {
slide.classList.add( 'has-light-background' );
}
}
}
return element;
}
/**
* 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 );
}
}
/**
* Applies the configuration settings from the config
* object. May be called multiple times.
*
* @param {object} options
*/
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.shuffle ) {
shuffle();
}
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.showNotes ) {
dom.speakerNotes.classList.add( 'visible' );
dom.speakerNotes.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
}
else {
dom.speakerNotes.classList.remove( 'visible' );
}
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();
disablePreviewLinks( '[data-preview-link=false]' );
}
else {
disablePreviewLinks();
enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
}
// 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' );
} );
}
// Slide numbers
var slideNumberDisplay = 'none';
if( config.slideNumber && !isPrintingPDF() ) {
if( config.showSlideNumber === 'all' ) {
slideNumberDisplay = 'block';
}
else if( config.showSlideNumber === 'speaker' && isSpeakerNotes() ) {
slideNumberDisplay = 'block';
}
}
dom.slideNumber.style.display = slideNumberDisplay;
sync();
}
/**
* 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 );
}
}
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( UA.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 ); } );
} );
}
/**
* 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 ); } );
} );
}
/**
* Extend object a with the properties of object b.
* If there's a conflict, object b takes precedence.
*
* @param {object} a
* @param {object} b
*/
function extend( a, b ) {
for( var i in b ) {
a[ i ] = b[ i ];
}
}
/**
* Converts the target object to an array.
*
* @param {object} o
* @return {object[]}
*/
function toArray( o ) {
return Array.prototype.slice.call( o );
}
/**
* Utility for deserializing a value.
*
* @param {*} value
* @return {*}
*/
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 value;
}
/**
* 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
*
* @return {number}
*/
function distanceBetween( a, b ) {
var dx = a.x - b.x,
dy = a.y - b.y;
return Math.sqrt( dx*dx + dy*dy );
}
/**
* Applies a CSS transform to the target element.
*
* @param {HTMLElement} element
* @param {string} transform
*/
function transformElement( element, transform ) {
element.style.WebkitTransform = transform;
element.style.MozTransform = transform;
element.style.msTransform = transform;
element.style.transform = transform;
}
/**
* Applies CSS transforms to the slides container. The container
* is transformed from two separate sources: layout and the overview
* mode.
*
* @param {object} transforms
*/
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 );
}
}
/**
* Injects the given CSS styles into the DOM.
*
* @param {string} value
*/
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 );
}
/**
* Find the closest parent that matches the given
* selector.
*
* @param {HTMLElement} target The child element
* @param {String} selector The CSS selector to match
* the parents against
*
* @return {HTMLElement} The matched parent or null
* if no matching parent was found
*/
function closestParent( target, selector ) {
var parent = target.parentNode;
while( parent ) {
// There's some overhead doing this each time, we don't
// want to rewrite the element prototype but should still
// be enough to feature detect once at startup...
var matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;
// If we find a match, we're all set
if( matchesMethod && matchesMethod.call( parent, selector ) ) {
return parent;
}
// Keep searching
parent = parent.parentNode;
}
return null;
}
/**
* Converts various color input formats to an {r:0,g:0,b:0} object.
*
* @param {string} color The string representation of a color
* @example
* colorToRgb('#000');
* @example
* colorToRgb('#000000');
* @example
* colorToRgb('rgb(0,0,0)');
* @example
* colorToRgb('rgba(0,0,0)');
*
* @return {{r: number, g: number, b: number, [a]: number}|null}
*/
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;
}
/**
* Calculates brightness on a scale of 0-255.
*
* @param {string} color See colorToRgb for supported formats.
* @see {@link colorToRgb}
*/
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;
}
/**
* Returns the remaining height within the parent of the
* target element.
*
* remaining height = [ configured parent height ] - [ current parent height ]
*
* @param {HTMLElement} element
* @param {number} [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 height;
}
/**
* Checks if this instance is being used to print a PDF.
*/
function isPrintingPDF() {
return ( /print-pdf/gi ).test( window.location.search );
}
/**
* 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 );
}
}
/**
* Causes the address bar to hide on mobile devices,
* more vertical space ftw.
*/
function removeAddressBar() {
setTimeout( function() {
window.scrollTo( 0, 1 );
}, 10 );
}
/**
* 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() }), '*' );
}
}
/**
* 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);
}
}
}
}
/**
* 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;
}
}
}
/**
* Bind preview frame links.
*
* @param {string} [selector=a] - selector for anchors
*/
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 );
}
} );
}
/**
* Unbind preview frame links.
*/
function disablePreviewLinks( selector ) {
var anchors = toArray( document.querySelectorAll( selector ? selector : 'a' ) );
anchors.forEach( function( element ) {
if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
element.removeEventListener( 'click', onPreviewLinkClicked, false );
}
} );
}
/**
* Opens a preview window for the target URL.
*
* @param {string} url - url for preview iframe src
*/
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>',
'<small class="viewport-inner">',
'<span class="x-frame-error">Unable to load iframe. This is likely due to the site\'s policy (x-frame-options).</span>',
'</small>',
'</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 );
}
/**
* Open or close help overlay window.
*
* @param {Boolean} [override] Flag which overrides the
* toggle logic and forcibly sets the desired state. True means
* help is open, false means it's closed.
*/
function toggleHelp( override ){
if( typeof override === 'boolean' ) {
override ? showHelp() : closeOverlay();
}
else {
if( dom.overlay ) {
closeOverlay();
}
else {
showHelp();
}
}
}
/**
* Opens an 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 );
}
}
/**
* Closes any currently open overlay.
*/
function closeOverlay() {
if( dom.overlay ) {
dom.overlay.parentNode.removeChild( dom.overlay );
dom.overlay = null;
}
}
/**
* Applies JavaScript-controlled layout rules to the
* presentation.
*/
function layout() {
if( dom.wrapper && !isPrintingPDF() ) {
var size = getComputedSlideSize();
// Layout the contents of the slides
layoutSlideContents( config.width, config.height );
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: '' } );
}
else {
// Prefer zoom for scaling up so that content remains crisp.
// Don't use zoom to scale down since that can lead to shifts
// in text layout/line breaks.
if( scale > 1 && features.zoom ) {
dom.slides.style.zoom = scale;
dom.slides.style.left = '';
dom.slides.style.top = '';
dom.slides.style.bottom = '';
dom.slides.style.right = '';
transformSlides( { layout: '' } );
}
// Apply scale transform as a fallback
else {
dom.slides.style.zoom = '';
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 +')' } );
}
}
// 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 - slide.scrollHeight ) / 2, 0 ) + 'px';
}
}
else {
slide.style.top = '';
}
}
updateProgress();
updateParallax();
if( isOverview() ) {
updateOverview();
}
}
}
/**
* Applies layout logic to the contents of all slides in
* the presentation.
*
* @param {string|number} width
* @param {string|number} height
*/
function layoutSlideContents( width, height ) {
// 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';
}
} );
}
/**
* Calculates the computed pixel size of our slides. These
* values are based on the width and height configuration
* options.
*
* @param {number} [presentationWidth=dom.wrapper.offsetWidth]
* @param {number} [presentationHeight=dom.wrapper.offsetHeight]
*/
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
};
// Reduce available space by margin
size.presentationWidth -= ( size.presentationWidth * 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;
}
/**
* 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 {string|number} [v=0] Index to memorize
*/
function setPreviousVerticalIndex( stack, v ) {
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {
stack.setAttribute( 'data-previous-indexv', v || 0 );
}
}
/**
* 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;
}
/**
* 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 );
}
} );
// Calculate slide sizes
var margin = 70;
var slideSize = getComputedSlideSize();
overviewSlideWidth = slideSize.width + margin;
overviewSlideHeight = slideSize.height + margin;
// Reverse in RTL mode
if( config.rtl ) {
overviewSlideWidth = -overviewSlideWidth;
}
updateSlidesVisibility();
layoutOverview();
updateOverview();
layout();
// Notify observers of the overview showing
dispatchEvent( 'overviewshown', {
'indexh': indexh,
'indexv': indexv,
'currentSlide': currentSlide
} );
}
}
/**
* Uses CSS transforms to position all slides in a grid for
* display inside of the overview mode.
*/
function layoutOverview() {
// Layout slides
toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
hslide.setAttribute( 'data-index-h', h );
transformElement( hslide, 'translate3d(' + ( h * overviewSlideWidth ) + '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 * overviewSlideHeight ) + 'px, 0)' );
} );
}
} );
// Layout slide backgrounds
toArray( dom.background.childNodes ).forEach( function( hbackground, h ) {
transformElement( hbackground, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
toArray( hbackground.querySelectorAll( '.slide-background' ) ).forEach( function( vbackground, v ) {
transformElement( vbackground, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
} );
} );
}
/**
* Moves the overview viewport to the current slides.
* Called each time the current slide changes.
*/
function updateOverview() {
var vmin = Math.min( window.innerWidth, window.innerHeight );
var scale = Math.max( vmin / 5, 150 ) / vmin;
transformSlides( {
overview: [
'scale('+ scale +')',
'translateX('+ ( -indexh * overviewSlideWidth ) +'px)',
'translateY('+ ( -indexv * overviewSlideHeight ) +'px)'
].join( ' ' )
} );
}
/**
* 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
} );
}
}
/**
* Toggles the slide overview mode on and off.
*
* @param {Boolean} [override] Flag which overrides the
* toggle logic and forcibly sets the desired state. True means
* overview is open, false means it's closed.
*/
function toggleOverview( override ) {
if( typeof override === 'boolean' ) {
override ? activateOverview() : deactivateOverview();
}
else {
isOverview() ? deactivateOverview() : activateOverview();
}
}
/**
* Checks if the overview is currently active.
*
* @return {Boolean} true if the overview is active,
* false otherwise
*/
function isOverview() {
return overview;
}
/**
* Checks if the current or specified slide is vertical
* (nested within another slide).
*
* @param {HTMLElement} [slide=currentSlide] The slide to check
* orientation of
* @return {Boolean}
*/
function isVerticalSlide( slide ) {
// Prefer slide argument, otherwise use current slide
slide = slide ? slide : currentSlide;
return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );
}
/**
* 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.documentElement;
// Check which implementation is available
var requestMethod = element.requestFullscreen ||
element.webkitRequestFullscreen ||
element.webkitRequestFullScreen ||
element.mozRequestFullScreen ||
element.msRequestFullscreen;
if( requestMethod ) {
requestMethod.apply( element );
}
}
/**
* 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' );
}
}
}
/**
* Exits from the paused mode.
*/
function resume() {
var wasPaused = dom.wrapper.classList.contains( 'paused' );
dom.wrapper.classList.remove( 'paused' );
cueAutoSlide();
if( wasPaused ) {
dispatchEvent( 'resumed' );
}
}
/**
* Toggles the paused mode on and off.
*/
function togglePause( override ) {
if( typeof override === 'boolean' ) {
override ? pause() : resume();
}
else {
isPaused() ? resume() : pause();
}
}
/**
* Checks if we are currently in the paused mode.
*
* @return {Boolean}
*/
function isPaused() {
return dom.wrapper.classList.contains( 'paused' );
}
/**
* Toggles the auto slide mode on and off.
*
* @param {Boolean} [override] 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();
}
}
/**
* Checks if the auto slide mode is currently on.
*
* @return {Boolean}
*/
function isAutoSliding() {
return !!( autoSlide && !autoSlidePaused );
}
/**
* Steps from the current point in the presentation to the
* slide which matches the specified horizontal and vertical
* indices.
*
* @param {number} [h=indexh] Horizontal index of the target slide
* @param {number} [v=indexv] Vertical index of the target slide
* @param {number} [f] Index of a fragment within the
* target slide to activate
* @param {number} [o] 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 );
// Abort if there are no slides
if( horizontalSlides.length === 0 ) return;
// 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( state[i] );
// Dispatch custom event matching the state's name
dispatchEvent( state[i] );
}
// 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 = getStatusText( currentSlide );
updateControls();
updateProgress();
updateBackground();
updateParallax();
updateSlideNumber();
updateNotes();
// Update the URL hash
writeURL();
cueAutoSlide();
}
/**
* 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();
updateSlideNumber();
updateSlidesVisibility();
updateBackground( true );
updateNotes();
formatEmbeddedContent();
// Start or stop embedded content depending on global config
if( config.autoPlayMedia === false ) {
stopEmbeddedContent( currentSlide );
}
else {
startEmbeddedContent( currentSlide );
}
if( isOverview() ) {
layoutOverview();
}
}
/**
* 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' );
}
} );
} );
}
/**
* 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' ) );
} );
}
/**
* Randomly shuffles all slides in the deck.
*/
function shuffle() {
var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
slides.forEach( function( slide ) {
// Insert this slide next to another random slide. This may
// cause the slide to insert before itself but that's fine.
dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] );
} );
}
/**
* 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 > 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' );
}
}
}
}
// 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;
}
/**
* 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 );
}
}
}
}
}
}
/**
* Pick up notes from the current slide and display them
* to the viewer.
*
* @see {@link config.showNotes}
*/
function updateNotes() {
if( config.showNotes && dom.speakerNotes && currentSlide && !isPrintingPDF() ) {
dom.speakerNotes.innerHTML = getSlideNotes() || '';
}
}
/**
* 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';
}
}
/**
* Updates the slide number div to reflect the current slide.
*
* The following slide number formats are available:
* "h.v": horizontal . vertical slide number (default)
* "h/v": horizontal / vertical slide number
* "c": flattened slide number
* "c/t": flattened slide number / total slides
*/
function updateSlideNumber() {
// Update slide number if enabled
if( config.slideNumber && dom.slideNumber ) {
var value = [];
var format = 'h.v';
// Check if a custom number format is available
if( typeof config.slideNumber === 'string' ) {
format = config.slideNumber;
}
switch( format ) {
case 'c':
value.push( getSlidePastCount() + 1 );
break;
case 'c/t':
value.push( getSlidePastCount() + 1, '/', getTotalSlides() );
break;
case 'h/v':
value.push( indexh + 1 );
if( isVerticalSlide() ) value.push( '/', indexv + 1 );
break;
default:
value.push( indexh + 1 );
if( isVerticalSlide() ) value.push( '.', indexv + 1 );
}
dom.slideNumber.innerHTML = formatSlideNumber( value[0], value[1], value[2] );
}
}
/**
* Applies HTML formatting to a slide number before it's
* written to the DOM.
*
* @param {number} a Current slide
* @param {string} delimiter Character to separate slide numbers
* @param {(number|*)} b Total slides
* @return {string} HTML string fragment
*/
function formatSlideNumber( a, delimiter, b ) {
if( typeof b === 'number' && !isNaN( b ) ) {
return '<span class="slide-number-a">'+ a +'</span>' +
'<span class="slide-number-delimiter">'+ delimiter +'</span>' +
'<span class="slide-number-b">'+ b +'</span>';
}
else {
return '<span class="slide-number-a">'+ a +'</span>';
}
}
/**
* 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' );
// Set 'disabled' attribute on all directions
node.setAttribute( 'disabled', 'disabled' );
} );
// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
if( routes.left ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
if( routes.right ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
if( routes.up ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
if( routes.down ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
// Prev/next buttons
if( routes.left || routes.up ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
if( routes.right || routes.down ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
// 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' ); el.removeAttribute( 'disabled' ); } );
if( fragments.next ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
// 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' ); el.removeAttribute( 'disabled' ); } );
if( fragments.next ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
}
else {
if( fragments.prev ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
if( fragments.next ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
}
}
}
/**
* 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 content inside of previous backgrounds
if( previousBackground ) {
stopEmbeddedContent( previousBackground );
}
// Start content in the current background
if( currentBackground ) {
startEmbeddedContent( currentBackground );
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;
}
// 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 );
}
/**
* 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 = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;
}
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 : 0;
dom.background.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
}
}
/**
* Called when the given slide is within the configured view
* distance. Shows the slide element and loads any content
* that is set to load lazily (data-src).
*
* @param {HTMLElement} slide Slide to show
*/
/**
* Called when the given slide is within the configured view
* distance. Shows the slide element and loads any content
* that is set to load lazily (data-src).
*
* @param {HTMLElement} slide Slide to show
*/
function showSlide( slide ) {
// Show the slide element
slide.style.display = config.display;
// Media elements with data-src attributes
toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[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' ),
backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' ),
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', '' );
}
if( backgroundVideoMuted ) {
video.muted = true;
}
// Inline video playback works (at least in Mobile Safari) as
// long as the video is muted and the `playsinline` attribute is
// present
if( isMobileDevice ) {
video.muted = true;
video.autoplay = true;
video.setAttribute( 'playsinline', '' );
}
// 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( 'allowfullscreen', '' );
iframe.setAttribute( 'mozallowfullscreen', '' );
iframe.setAttribute( 'webkitallowfullscreen', '' );
// Only load autoplaying content when the slide is shown to
// avoid having it play in the background
if( /autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {
iframe.setAttribute( 'data-src', backgroundIframe );
}
else {
iframe.setAttribute( 'src', backgroundIframe );
}
iframe.style.width = '100%';
iframe.style.height = '100%';
iframe.style.maxHeight = '100%';
iframe.style.maxWidth = '100%';
background.appendChild( iframe );
}
}
}
}
/**
* Called when the given slide is moved outside of the
* configured view distance.
*
* @param {HTMLElement} slide
*/
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';
}
}
/**
* Determine what available routes there are for navigation.
*
* @return {{left: boolean, right: boolean, up: boolean, down: boolean}}
*/
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
};
// reverse horizontal controls for rtl
if( config.rtl ) {
var left = routes.left;
routes.left = routes.right;
routes.right = left;
}
return routes;
}
/**
* Returns an object describing the available fragment
* directions.
*
* @return {{prev: boolean, next: boolean}}
*/
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
};
}
else {
return { prev: false, next: false };
}
}
/**
* Enforces origin-specific format rules for embedded media.
*/
function formatEmbeddedContent() {
var _appendParamToIframeSource = function( sourceAttribute, sourceURL, param ) {
toArray( dom.slides.querySelectorAll( 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ) ).forEach( function( el ) {
var src = el.getAttribute( sourceAttribute );
if( src && src.indexOf( param ) === -1 ) {
el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param );
}
});
};
// YouTube frames must include "?enablejsapi=1"
_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );
_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );
// Vimeo frames must include "?api=1"
_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );
_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );
}
/**
* Start playback of any embedded content inside of
* the given element.
*
* @param {HTMLElement} element
*/
function startEmbeddedContent( element ) {
if( element && !isSpeakerNotes() ) {
// Restart GIFs
toArray( element.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( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
return;
}
// Prefer an explicit global autoplay setting
var autoplay = config.autoPlayMedia;
// If no global setting is available, fall back on the element's
// own autoplay setting
if( typeof autoplay !== 'boolean' ) {
autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' );
}
if( autoplay && typeof el.play === 'function' ) {
if( el.readyState > 1 ) {
startEmbeddedMedia( { target: el } );
}
else {
el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes
el.addEventListener( 'loadeddata', startEmbeddedMedia );
}
}
} );
// Normal iframes
toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( function( el ) {
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
return;
}
startEmbeddedIframe( { target: el } );
} );
// Lazy loading iframes
toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
return;
}
if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
el.removeEventListener( 'load', startEmbeddedIframe ); // remove first to avoid dupes
el.addEventListener( 'load', startEmbeddedIframe );
el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
}
} );
}
}
/**
* Starts playing an embedded video/audio element after
* it has finished loading.
*
* @param {object} event
*/
function startEmbeddedMedia( event ) {
var isAttachedToDOM = !!closestParent( event.target, 'html' ),
isVisible = !!closestParent( event.target, '.present' );
if( isAttachedToDOM && isVisible ) {
event.target.currentTime = 0;
event.target.play();
}
event.target.removeEventListener( 'loadeddata', startEmbeddedMedia );
}
/**
* "Starts" the content of an embedded iframe using the
* postMessage API.
*
* @param {object} event
*/
function startEmbeddedIframe( event ) {
var iframe = event.target;
if( iframe && iframe.contentWindow ) {
var isAttachedToDOM = !!closestParent( event.target, 'html' ),
isVisible = !!closestParent( event.target, '.present' );
if( isAttachedToDOM && isVisible ) {
// Prefer an explicit global autoplay setting
var autoplay = config.autoPlayMedia;
// If no global setting is available, fall back on the element's
// own autoplay setting
if( typeof autoplay !== 'boolean' ) {
autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
}
// YouTube postMessage API
if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
}
// Vimeo postMessage API
else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
iframe.contentWindow.postMessage( '{"method":"play"}', '*' );
}
// Generic postMessage API
else {
iframe.contentWindow.postMessage( 'slide:start', '*' );
}
}
}
}
/**
* Stop playback of any embedded content inside of
* the targeted slide.
*
* @param {HTMLElement} element
*/
function stopEmbeddedContent( element ) {
if( element && element.parentNode ) {
// HTML5 media elements
toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
el.setAttribute('data-paused-by-reveal', '');
el.pause();
}
} );
// Generic postMessage API for non-lazy loaded iframes
toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) {
if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
el.removeEventListener( 'load', startEmbeddedIframe );
});
// YouTube postMessage API
toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) {
if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
}
});
// Vimeo postMessage API
toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) {
if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
el.contentWindow.postMessage( '{"method":"pause"}', '*' );
}
});
// Lazy loading iframes
toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
// Only removing the src doesn't actually unload the frame
// in all browsers (Firefox) so we set it to blank first
el.setAttribute( 'src', 'about:blank' );
el.removeAttribute( 'src' );
} );
}
}
/**
* Returns the number of past slides. This can be used as a global
* flattened index for slides.
*
* @return {number} Past slide count
*/
function getSlidePastCount() {
var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
// The number of past slides
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++;
}
// 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++;
}
}
return pastCount;
}
/**
* Returns a value ranging from 0-1 that represents
* how far into the presentation we have navigated.
*
* @return {number}
*/
function getProgress() {
// The number of past and total slides
var totalCount = getTotalSlides();
var pastCount = getSlidePastCount();
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 pastCount / ( totalCount - 1 );
}
/**
* Checks if this presentation is running inside of the
* speaker notes window.
*
* @return {boolean}
*/
function isSpeakerNotes() {
return !!window.location.search.match( /receiver/gi );
}
/**
* 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 );
}
}
}
/**
* 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.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;
}
}
}
/**
* Retrieves the h/v location and fragment 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 {{h: number, v: number, f: number}}
*/
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( !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: h, v: v, f: f };
}
/**
* Retrieves all slides in this presentation.
*/
function getSlides() {
return toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack)' ));
}
/**
* Retrieves the total number of slides in this presentation.
*
* @return {number}
*/
function getTotalSlides() {
return getSlides().length;
}
/**
* Returns the slide element matching the specified index.
*
* @return {HTMLElement}
*/
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;
}
/**
* 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.
*
* @param {number} x Horizontal background index
* @param {number} y Vertical background index
* @return {(HTMLElement[]|*)}
*/
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 ) {
return slide.slideBackgroundElement;
}
return undefined;
}
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;
}
/**
* Retrieves the speaker notes from a slide. Notes can be
* defined in two ways:
* 1. As a data-notes attribute on the slide <section>
* 2. As an <aside class="notes"> inside of the slide
*
* @param {HTMLElement} [slide=currentSlide]
* @return {(string|null)}
*/
function getSlideNotes( slide ) {
// Default to the current slide
slide = slide || currentSlide;
// Notes can be specified via the data-notes attribute...
if( slide.hasAttribute( 'data-notes' ) ) {
return slide.getAttribute( 'data-notes' );
}
// ... or using an <aside class="notes"> element
var notesElement = slide.querySelector( 'aside.notes' );
if( notesElement ) {
return notesElement.innerHTML;
}
return null;
}
/**
* Retrieves the current state of the presentation as
* an object. This state can then be restored at any
* time.
*
* @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}
*/
function getState() {
var indices = getIndices();
return {
indexh: indices.h,
indexv: indices.v,
indexf: indices.f,
paused: isPaused(),
overview: isOverview()
};
}
/**
* Restores the presentation to the given state.
*
* @param {object} state As generated by getState()
* @see {@link getState} generates the parameter `state`
*/
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 );
}
}
}
/**
* Return a sorted fragments list, ordered by an increasing
* "data-fragment-index" attribute.
*
* Fragments will be revealed in the order that they are returned by
* this function, so you can use the index attributes to control the
* order of fragment appearance.
*
* To maintain a sensible default fragment order, fragments are presumed
* to be passed in document order. This function adds a "fragment-index"
* attribute to each node if such an attribute is not already present,
* and sets that attribute to an integer value which is the position of
* the fragment within the fragments list.
*
* @param {object[]|*} fragments
* @return {object[]} sorted Sorted array of fragments
*/
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;
}
/**
* 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;
}
}
// 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 = getStatusText( element );
if( i === index ) {
element.classList.add( 'current-fragment' );
startEmbeddedContent( element );
}
}
// 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 false;
}
/**
* Navigate to the next slide fragment.
*
* @return {boolean} true if there was a next fragment,
* false otherwise
*/
function nextFragment() {
return navigateFragment( 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 );
}
/**
* Cues a new automated slide if enabled in the config.
*/
function cueAutoSlide() {
cancelAutoSlide();
if( currentSlide ) {
var fragment = currentSlide.querySelector( '.current-fragment' );
// When the slide first appears there is no "current" fragment so
// we look for a data-autoslide timing on the first fragment
if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
var fragmentAutoSlide = fragment ? fragment.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. Not applicable if the slide
// is divided up into fragments.
// playbackRate is accounted for in the duration.
if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
if( el.hasAttribute( 'data-autoplay' ) ) {
if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
autoSlide = ( el.duration * 1000 / el.playbackRate ) + 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( function() {
typeof config.autoSlideMethod === 'function' ? config.autoSlideMethod() : navigateNext();
cueAutoSlide();
}, autoSlide );
autoSlideStartTime = Date.now();
}
if( autoSlidePlayer ) {
autoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );
}
}
}
/**
* Cancels any ongoing request to auto-slide.
*/
function cancelAutoSlide() {
clearTimeout( autoSlideTimeout );
autoSlideTimeout = -1;
}
function pauseAutoSlide() {
if( autoSlide && !autoSlidePaused ) {
autoSlidePaused = true;
dispatchEvent( 'autoslidepaused' );
clearTimeout( autoSlideTimeout );
if( autoSlidePlayer ) {
autoSlidePlayer.setPlaying( false );
}
}
}
function resumeAutoSlide() {
if( autoSlide && autoSlidePaused ) {
autoSlidePaused = false;
dispatchEvent( 'autoslideresumed' );
cueAutoSlide();
}
}
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 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 navigateUp() {
// Prioritize hiding fragments
if( ( isOverview() || previousFragment() === false ) && availableRoutes().up ) {
slide( indexh, indexv - 1 );
}
}
function navigateDown() {
// Prioritize revealing fragments
if( ( isOverview() || nextFragment() === false ) && availableRoutes().down ) {
slide( indexh, indexv + 1 );
}
}
/**
* 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 );
}
}
}
}
/**
* The reverse of #navigatePrev().
*/
function navigateNext() {
// Prioritize revealing fragments
if( nextFragment() === false ) {
if( availableRoutes().down ) {
navigateDown();
}
else if( config.rtl ) {
navigateLeft();
}
else {
navigateRight();
}
}
}
/**
* Checks if the target element prevents the triggering of
* swipe navigation.
*/
function isSwipePrevented( target ) {
while( target && typeof target.hasAttribute === 'function' ) {
if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
target = target.parentNode;
}
return false;
}
// --------------------------------------------------------------------//
// ----------------------------- EVENTS -------------------------------//
// --------------------------------------------------------------------//
/**
* Called by all event handlers that are based on user
* input.
*
* @param {object} [event]
*/
function onUserInput( event ) {
if( config.autoSlideStoppable ) {
pauseAutoSlide();
}
}
/**
* Handler for the document level 'keypress' event.
*
* @param {object} event
*/
function onDocumentKeyPress( event ) {
// Check if the pressed key is question mark
if( event.shiftKey && event.charCode === 63 ) {
toggleHelp();
}
}
/**
* Handler for the document level 'keydown' event.
*
* @param {object} 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 );
var activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
// Disregard the event if there's a focused element or a
// keyboard modifier key is present
if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || (event.shiftKey && event.keyCode !== 32) || event.altKey || event.ctrlKey || event.metaKey ) return;
// While paused only allow resume keyboard events; 'b', 'v', '.'
var resumeKeyCodes = [66,86,190,191];
var key;
// Custom key bindings for togglePause should be able to resume
if( typeof config.keyboard === 'object' ) {
for( key in config.keyboard ) {
if( config.keyboard[key] === 'togglePause' ) {
resumeKeyCodes.push( parseInt( key, 10 ) );
}
}
}
if( isPaused() && resumeKeyCodes.indexOf( event.keyCode ) === -1 ) {
return false;
}
var triggered = false;
// 1. User defined key bindings
if( typeof config.keyboard === 'object' ) {
for( key in config.keyboard ) {
// Check if this binding matches the pressed key
if( parseInt( key, 10 ) === 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;
}
}
}
// 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, v, period, Logitech presenter tools "black screen" button
case 58: case 59: case 66: case 86: case 190: case 191: togglePause(); break;
// f
case 70: enterFullscreen(); break;
// a
case 65: if ( config.autoSlideStoppable ) toggleAutoSlide( autoSlideWasPaused ); break;
default:
triggered = false;
}
}
// If the input resulted in a triggered action we should prevent
// the browsers default behavior
if( triggered ) {
event.preventDefault && event.preventDefault();
}
// ESC or O key
else if ( ( 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();
}
/**
* Handler for the 'touchstart' event, enables support for
* swipe and pinch gestures.
*
* @param {object} event
*/
function onTouchStart( event ) {
if( isSwipePrevented( event.target ) ) return true;
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
} );
}
}
/**
* Handler for the 'touchmove' event.
*
* @param {object} event
*/
function onTouchMove( event ) {
if( isSwipePrevented( event.target ) ) return true;
// 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( UA.match( /android/gi ) ) {
event.preventDefault();
}
}
/**
* Handler for the 'touchend' event.
*
* @param {object} event
*/
function onTouchEnd( event ) {
touch.captured = false;
}
/**
* Convert pointer down to touch start.
*
* @param {object} event
*/
function onPointerDown( event ) {
if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
onTouchStart( event );
}
}
/**
* Convert pointer move to touch move.
*
* @param {object} event
*/
function onPointerMove( event ) {
if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
onTouchMove( event );
}
}
/**
* Convert pointer up to touch end.
*
* @param {object} event
*/
function onPointerUp( event ) {
if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
onTouchEnd( event );
}
}
/**
* Handles mouse wheel scrolling, throttled to avoid skipping
* multiple slides.
*
* @param {object} event
*/
function onDocumentMouseScroll( event ) {
if( Date.now() - lastMouseWheelStep > 600 ) {
lastMouseWheelStep = Date.now();
var delta = event.detail || -event.wheelDelta;
if( delta > 0 ) {
navigateNext();
}
else if( delta < 0 ) {
navigatePrev();
}
}
}
/**
* Clicking on the progress bar results in a navigation to the
* closest approximate horizontal slide using this equation:
*
* ( clickX / presentationWidth ) * numberOfSlides
*
* @param {object} event
*/
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 );
}
/**
* 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.
*
* @param {object} [event]
*/
function onWindowHashChange( event ) {
readURL();
}
/**
* Handler for the window level 'resize' event.
*
* @param {object} [event]
*/
function onWindowResize( event ) {
layout();
}
/**
* Handle for the window level 'visibilitychange' event.
*
* @param {object} [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();
}
}
/**
* Invoked when a slide is and we're in the overview.
*
* @param {object} event
*/
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 );
}
}
}
}
/**
* Handles clicks on links that are set to preview in the
* iframe overlay.
*
* @param {object} event
*/
function onPreviewLinkClicked( event ) {
if( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) {
var url = event.currentTarget.getAttribute( 'href' );
if( url ) {
showPreview( url );
event.preventDefault();
}
}
}
/**
* Handles click on the auto-sliding controls element.
*
* @param {object} [event]
*/
function onAutoSlidePlayerClick( event ) {
// Replay
if( Reveal.isLastSlide() && config.loop === false ) {
slide( 0, 0 );
resumeAutoSlide();
}
// Resume
else if( autoSlidePaused ) {
resumeAutoSlide();
}
// Pause
else {
pauseAutoSlide();
}
}
// --------------------------------------------------------------------//
// ------------------------ 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 = 100;
this.diameter2 = this.diameter/2;
this.thickness = 6;
// 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.canvas.style.width = this.diameter2 + 'px';
this.canvas.style.height = this.diameter2 + 'px';
this.context = this.canvas.getContext( '2d' );
this.container.appendChild( this.canvas );
this.render();
}
/**
* @param value
*/
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();
}
};
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.diameter2 ) - this.thickness,
x = this.diameter2,
y = this.diameter2,
iconSize = 28;
// 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 + 4, 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 - 4, iconSize );
this.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );
}
else {
this.context.beginPath();
this.context.translate( 4, 0 );
this.context.moveTo( 0, 0 );
this.context.lineTo( iconSize - 4, 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 = {
VERSION: VERSION,
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,
// Randomizes the order of slides
shuffle: shuffle,
// 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 a help overlay with keyboard shortcuts
toggleHelp: toggleHelp,
// 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
getSlidePastCount: getSlidePastCount,
// Presentation progress on range of 0-1
getProgress: getProgress,
// Returns the indices of the current, or specified, slide
getIndices: getIndices,
// Returns an Array of all slides
getSlides: getSlides,
// Returns the total number of slides
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 speaker notes string for a slide, or null
getSlideNotes: getSlideNotes,
// Returns the previous slide element, may be null
getPreviousSlide: function() {
return previousSlide;
},
// Returns the current slide element
getCurrentSlide: function() {
return currentSlide;
},
// Returns the current scale of the presentation content
getScale: function() {
return scale;
},
// Returns the current configuration object
getConfig: function() {
return config;
},
// 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 query;
},
// Returns true if we're currently on the first slide
isFirstSlide: function() {
return ( indexh === 0 && indexv === 0 );
},
// 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;
},
// Checks if reveal.js has been loaded and is ready for use
isReady: function() {
return loaded;
},
// 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( type, listener, useCapture ) {
if( 'addEventListener' in window ) {
( dom.wrapper || document.querySelector( '.reveal' ) ).removeEventListener( type, listener, useCapture );
}
},
// Programatically triggers a keyboard event
triggerKey: function( keyCode ) {
onDocumentKeyDown( { keyCode: keyCode } );
},
// Registers a new shortcut to include in the help overlay
registerKeyboardShortcut: function( key, value ) {
keyboardShortcuts[key] = value;
}
};
return Reveal;
}));
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