merge hakimel#1955 with minor changes

Gruntfile.js

@@ -78,6 +78,7 @@ module.exports = function(grunt) {
 				eqnull: true,
 				browser: true,
 				expr: true,
+				loopfunc: true,
 				globals: {
 					head: false,
 					module: false,

README.md

@@ -947,6 +947,11 @@ Reveal.initialize({
 Presentations can be exported to PDF via a special print stylesheet. This feature requires that you use [Google Chrome](http://google.com/chrome) or [Chromium](https://www.chromium.org/Home) and to be serving the presentation from a webserver.
 Here's an example of an exported presentation that's been uploaded to SlideShare: http://www.slideshare.net/hakimel/revealjs-300.
 
+### Separate pages for fragments
+[Fragments](#fragments) are printed on separate slides by default. Meaning if you have a slide with three fragment steps, it will generate three separate slides where the fragments appear incrementally.
+
+If you prefer printing all fragments in their visible states on the same slide you can set the `pdfSeparateFragments` config option to false.
+
 ### Page size
 
 Export dimensions are inferred from the configured [presentation size](#presentation-size). Slides that are too tall to fit within a single page will expand onto multiple pages. You can limit how many pages a slide may expand onto using the `pdfMaxPagesPerSlide` config option, for example `Reveal.configure({ pdfMaxPagesPerSlide: 1 })` ensures that no slide ever grows to more than one printed page.

js/reveal.js

@@ -204,6 +204,9 @@
 			// to PDF, unlimited by default
 			pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
 
+			// Prints each fragment on a separate slide
+			pdfSeparateFragments: true,
+
 			// 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
@@ -789,29 +792,38 @@
 				}
 
 				// Copy page and show fragments one after another
-				if ( isPrintingPDFFragments() ) {
+				if( config.pdfSeparateFragments ) {
 
 					var numberOfFragments = toArray( page.querySelectorAll( '.fragment' ) ).length;
 
-					for ( var currentFragment = 0; currentFragment < numberOfFragments; currentFragment++ ) {
+					for( var currentFragment = 0; currentFragment < numberOfFragments; currentFragment++ ) {
+
 						var clonedPage = page.cloneNode( true );
 						page.parentNode.insertBefore( clonedPage, page.nextSibling );
 
-						toArray( sortFragments( clonedPage.querySelectorAll( '.fragment' ))).forEach( function ( fragment, fragmentIndex ) {
-							if ( fragmentIndex <= currentFragment ) {
+						toArray( sortFragments( clonedPage.querySelectorAll( '.fragment' ) ) ).forEach( function( fragment, fragmentIndex ) {
+
+							if( fragmentIndex < currentFragment ) {
 								fragment.classList.add( 'visible' );
-							} else {
-								fragment.classList.remove( 'visible' );
+								fragment.classList.remove( 'current-fragment' );
+							}
+							else if( fragmentIndex === currentFragment ) {
+								fragment.classList.add( 'visible', 'current-fragment' );
 							}
+							else {
+								fragment.classList.remove( 'visible', 'current-fragment' );
+							}
+
 						} );
 
 						page = clonedPage;
+
 					}
 
 				}
 				// Show all fragments
 				else {
-					toArray( page.querySelectorAll( '.fragment' ) ).forEach( function( fragment ) {
+					toArray( page.querySelectorAll( '.fragment:not(.fade-out)' ) ).forEach( function( fragment ) {
 						fragment.classList.add( 'visible' );
 					} );
 				}
@@ -820,7 +832,6 @@
 
 		} );
 
-
 		// Notify subscribers that the PDF layout is good to go
 		dispatchEvent( 'pdf-ready' );