update code style to match rest of reveal.js, disable parallax by default #595

css/reveal.css

@@ -1405,6 +1405,7 @@ body {
 /*********************************************
  * PARALLAX BACKGROUND
  *********************************************/
+
 .reveal[data-parallax-background] {
 	-webkit-transition: all 0.8s ease;
 	   -moz-transition: all 0.8s ease;

index.html

@@ -367,8 +367,8 @@ function linkify( selector ) {
 				transition: Reveal.getQueryHash().transition || 'default', // default/cube/page/concave/zoom/linear/fade/none
 
 				// Parallax scrolling
-				parallaxBackgroundImage: "url('https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg')",
+				// parallaxBackgroundImage: "url('https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg')",
-				parallaxBackgroundSize: "2100px 900px",
+				// parallaxBackgroundSize: "2100px 900px",
 
 				// Optional libraries used to extend on reveal.js
 				dependencies: [

js/reveal.js

@@ -480,7 +480,7 @@ var Reveal = (function(){
 		var parallaxBackgroundImage = config.parallaxBackgroundImage,
 			parallaxBackgroundSize = config.parallaxBackgroundSize;
 
-		if (parallaxBackgroundImage) {
+		if( parallaxBackgroundImage ) {
 			dom.wrapper.style.background = parallaxBackgroundImage;
 			dom.wrapper.style.backgroundSize = parallaxBackgroundSize;
 
@@ -489,8 +489,8 @@ var Reveal = (function(){
 			// annoying background slide-in effect when the presentation starts, apply
 			// these properties after short time delay
 			setTimeout( function() {
-				dom.wrapper.setAttribute('data-parallax-background', parallaxBackgroundImage);
+				dom.wrapper.setAttribute( 'data-parallax-background', parallaxBackgroundImage );
-				dom.wrapper.setAttribute('data-parallax-background-size', parallaxBackgroundSize);
+				dom.wrapper.setAttribute( 'data-parallax-background-size', parallaxBackgroundSize );
 			}, 1 );
 
 		}
@@ -1497,25 +1497,26 @@ var Reveal = (function(){
 		currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;
 
 		// Animate parallax background
-		if (dom.wrapper.getAttribute('data-parallax-background') || config.parallaxBackgroundImage) {
+		if( dom.wrapper.getAttribute( 'data-parallax-background' ) || config.parallaxBackgroundImage ) {
-			var bs = dom.wrapper.style.backgroundSize.split(' '),
+			var bs = dom.wrapper.style.backgroundSize.split( ' ' ),
 				bgWidth, bgHeight;
 
-			if (bs.length === 1) {
+			if( bs.length === 1 ) {
-				bgWidth = bgHeight = parseInt(bs[0], 10);
+				bgWidth = bgHeight = parseInt( bs[0], 10 );
-			} else {
+			}
-				bgWidth = parseInt(bs[0], 10);
+			else {
-				bgHeight = parseInt(bs[1], 10);
+				bgWidth = parseInt( bs[0], 10 );
+				bgHeight = parseInt( bs[1], 10 );
 			}
 
 
-			var slideWidth = parseInt(dom.wrapper.offsetWidth, 10);
+			var slideWidth = dom.wrapper.offsetWidth;
 			var horizontalSlideCount = horizontalSlides.length;
-			var horizontalOffset = -(bgWidth - slideWidth)/(horizontalSlideCount-1) * h;
+			var horizontalOffset = -( bgWidth - slideWidth ) / ( horizontalSlideCount-1 ) * h;
 
-			var slideHeight = parseInt(dom.wrapper.offsetHeight, 10);
+			var slideHeight = dom.wrapper.offsetHeight;
 			var verticalSlideCount = currentVerticalSlides.length;
-			var verticalOffset = verticalSlideCount > 0 ? -(bgHeight - slideHeight)/(verticalSlideCount-1) * v : 0;
+			var verticalOffset = verticalSlideCount > 0 ? -( bgHeight - slideHeight ) / ( verticalSlideCount-1 ) * v : 0;
 
 			dom.wrapper.style.backgroundPosition = horizontalOffset + 'px ' + verticalOffset + 'px';
 		}