From 794ad868093849bf4dbcd6d45ccc5f3b8b6fb76c Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Sat, 10 Nov 2012 10:02:19 -0500
Subject: [PATCH] corrections to vertical centering (#70), added to docs,
 upgrade to 2.2

---
 README.md        |   3 +
 css/reveal.css   |  20 +++----
 index.html       |   1 +
 js/reveal.js     |  11 +++-
 js/reveal.min.js | 151 ++++++++++++++++++++++++-----------------------
 5 files changed, 99 insertions(+), 87 deletions(-)

diff --git a/README.md b/README.md
index dd7d8201..fd58c718 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,9 @@ Reveal.initialize({
 	// Enable the slide overview mode
 	overview: true,
 
+	// Vertical centering of slides
+	center: false,
+
 	// Loop the presentation
 	loop: false,
 
diff --git a/css/reveal.css b/css/reveal.css
index c6545057..5f6a023c 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -490,10 +490,10 @@ body {
  *********************************************/
 
 .reveal {
+	position: relative;
 	width: 100%;
 	height: 100%;
-	min-height: 600px;
-	position: relative;
+	min-height: 640px; /* min height + 40 to account for padding */
 }
 
 .reveal .slides {
@@ -504,9 +504,9 @@ body {
 	left: 50%;
 	top: 50%;
 	padding: 20px 0px;
+	
 	overflow: visible;
 	z-index: 1;
-
 	text-align: center;
 
 	-webkit-transition: -webkit-perspective .4s ease;
@@ -520,10 +520,10 @@ body {
 	    -ms-perspective: 600px;
 	        perspective: 600px;
 
-	-webkit-perspective-origin: 0% 0%;
-	   -moz-perspective-origin: 0% 0%;
-	    -ms-perspective-origin: 0% 0%;
-	        perspective-origin: 0% 0%;
+	-webkit-perspective-origin: 0% -25%;
+	   -moz-perspective-origin: 0% -25%;
+	    -ms-perspective-origin: 0% -25%;
+	        perspective-origin: 0% -25%;
 }
 
 .reveal .slides>section,
@@ -566,14 +566,14 @@ body {
 }
 
 .reveal .slides>section {
-	margin-left: -50%;
-	margin-top: -50%;
+	left: -50%;
+	top: -50%;
 }
 
 .reveal.center,
 .reveal.center .slides {
-	padding: 0;
 	min-height: auto;
+	padding: 0;
 }
 
 
diff --git a/index.html b/index.html
index de0637c2..82570f34 100644
--- a/index.html
+++ b/index.html
@@ -350,6 +350,7 @@ function linkify( selector ) {
 				controls: true,
 				progress: true,
 				history: true,
+				center: true,
 
 				theme: Reveal.getQueryHash().theme, // available themes are in /css/theme
 				transition: Reveal.getQueryHash().transition || 'default', // default/cube/page/concave/zoom/linear/none
diff --git a/js/reveal.js b/js/reveal.js
index a1683ec0..564c863a 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1,5 +1,5 @@
 /*!
- * reveal.js 2.1 r37
+ * reveal.js 2.2 r38
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  *
@@ -29,6 +29,7 @@ var Reveal = (function(){
 			// Enable the slide overview mode
 			overview: true,
 
+			// Vertical centering of slides
 			center: false,
 
 			// Loop the presentation
@@ -465,6 +466,7 @@ var Reveal = (function(){
 	 * presentation.
 	 */
 	function layout() {
+
 		if( config.center ) {
 
 			// Select all slides, vertical and horizontal
@@ -476,15 +478,18 @@ var Reveal = (function(){
 			for( var i = 0, len = slides.length; i < len; i++ ) {
 				var slide = slides[ i ];
 
+				// Vertical stacks are not centered since their section 
+				// children will be
 				if( slide.classList.contains( 'stack' ) ) {
-					slide.style.marginTop = 0;
+					slide.style.top = 0;
 				}
 				else {
-					slide.style.marginTop = Math.max( - ( slide.offsetHeight / 2 ) - 20, minTop ) + 'px';
+					slide.style.top = Math.max( - ( slide.offsetHeight / 2 ) - 20, minTop ) + 'px';
 				}
 			}
 
 		}
+
 	}
 
 	/**
diff --git a/js/reveal.min.js b/js/reveal.min.js
index e31d807c..31676651 100644
--- a/js/reveal.min.js
+++ b/js/reveal.min.js
@@ -1,83 +1,86 @@
 /*!
- * reveal.js 2.1 r37
+ * reveal.js 2.2 r38
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  *
  * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
  */
-var Reveal=(function(){var l=".reveal .slides>section",b=".reveal .slides>section.present>section",R={controls:true,progress:true,history:false,keyboard:true,overview:true,loop:false,autoSlide:0,mouseWheel:true,rollingLinks:true,theme:null,transition:"default",dependencies:[]},Y=R.autoSlide,m=0,e=0,y,G,ak=[],f={},T="WebkitPerspective" in document.body.style||"MozPerspective" in document.body.style||"msPerspective" in document.body.style||"OPerspective" in document.body.style||"perspective" in document.body.style,n="WebkitTransform" in document.body.style||"MozTransform" in document.body.style||"msTransform" in document.body.style||"OTransform" in document.body.style||"transform" in document.body.style,z=0,k=0,D=0,ac={startX:0,startY:0,startSpan:0,startCount:0,handled:false,threshold:80};
-function i(al){if((!n&&!T)){document.body.setAttribute("class","no-transforms");return;}t(R,al);d();V();}function P(){f.theme=document.querySelector("#theme");
-f.wrapper=document.querySelector(".reveal");if(!f.wrapper.querySelector(".progress")&&R.progress){var ao=document.createElement("div");ao.classList.add("progress");
-ao.innerHTML="<span></span>";f.wrapper.appendChild(ao);}if(!f.wrapper.querySelector(".controls")&&R.controls){var an=document.createElement("aside");an.classList.add("controls");
-an.innerHTML='<div class="left"></div><div class="right"></div><div class="up"></div><div class="down"></div>';f.wrapper.appendChild(an);}if(!f.wrapper.querySelector(".state-background")){var am=document.createElement("div");
-am.classList.add("state-background");f.wrapper.appendChild(am);}if(!f.wrapper.querySelector(".pause-overlay")){var al=document.createElement("div");al.classList.add("pause-overlay");
-f.wrapper.appendChild(al);}f.progress=document.querySelector(".reveal .progress");f.progressbar=document.querySelector(".reveal .progress span");if(R.controls){f.controls=document.querySelector(".reveal .controls");
+var Reveal=(function(){var m=".reveal .slides>section",b=".reveal .slides>section.present>section",T={controls:true,progress:true,history:false,keyboard:true,overview:true,center:false,loop:false,autoSlide:0,mouseWheel:true,rollingLinks:true,theme:null,transition:"default",dependencies:[]},aa=T.autoSlide,n=0,e=0,z,H,am=[],f={},V="WebkitPerspective" in document.body.style||"MozPerspective" in document.body.style||"msPerspective" in document.body.style||"OPerspective" in document.body.style||"perspective" in document.body.style,o="WebkitTransform" in document.body.style||"MozTransform" in document.body.style||"msTransform" in document.body.style||"OTransform" in document.body.style||"transform" in document.body.style,A=0,l=0,E=0,ae={startX:0,startY:0,startSpan:0,startCount:0,handled:false,threshold:80};
+function j(an){if((!o&&!V)){document.body.setAttribute("class","no-transforms");return;}u(T,an);d();X();}function Q(){f.theme=document.querySelector("#theme");
+f.wrapper=document.querySelector(".reveal");if(!f.wrapper.querySelector(".progress")&&T.progress){var aq=document.createElement("div");aq.classList.add("progress");
+aq.innerHTML="<span></span>";f.wrapper.appendChild(aq);}if(!f.wrapper.querySelector(".controls")&&T.controls){var ap=document.createElement("aside");ap.classList.add("controls");
+ap.innerHTML='<div class="left"></div><div class="right"></div><div class="up"></div><div class="down"></div>';f.wrapper.appendChild(ap);}if(!f.wrapper.querySelector(".state-background")){var ao=document.createElement("div");
+ao.classList.add("state-background");f.wrapper.appendChild(ao);}if(!f.wrapper.querySelector(".pause-overlay")){var an=document.createElement("div");an.classList.add("pause-overlay");
+f.wrapper.appendChild(an);}f.progress=document.querySelector(".reveal .progress");f.progressbar=document.querySelector(".reveal .progress span");if(T.controls){f.controls=document.querySelector(".reveal .controls");
 f.controlsLeft=document.querySelector(".reveal .controls .left");f.controlsRight=document.querySelector(".reveal .controls .right");f.controlsUp=document.querySelector(".reveal .controls .up");
 f.controlsDown=document.querySelector(".reveal .controls .down");}}function d(){if(navigator.userAgent.match(/(iphone|ipod|android)/i)){document.documentElement.style.overflow="scroll";
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-}if(typeof ao.callback==="function"){head.ready(ao.src.match(/([\w\d_\-]*)\.?[^\\\/]*$/i)[0],ao.callback);}}}function ap(){if(aq.length){head.js.apply(null,aq);
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