support for named links (closes #55)

README.md

@@ -165,6 +165,15 @@ Reveal.addEventListener( 'fragmenthidden', function( event ) {
 } );
 ```
 
+### Internal links
+
+It's easy to link between slides. The first example below targets the index of another slide whereas the second targets a slide with an ID attribute (```<section id="'"some-slide">```):
+
+```html
+<a href="#/2/2">Link</a>
+<a href="#/some-slide">Link</a>
+```
+
 ## PDF Export
 
 Presentations can be exported to PDF via a special print stylesheet. This feature requires that you use [Google Chrome](http://google.com/chrome). 

js/reveal.js

@@ -1,5 +1,5 @@
 /*!
- * reveal.js 2.0 r19
+ * reveal.js 2.0 r20
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  * 
@@ -834,15 +834,36 @@ var Reveal = (function(){
 	 * Reads the current URL (hash) and navigates accordingly.
 	 */
 	function readURL() {
-		// Break the hash down to separate components
+		var hash = window.location.hash;
-		var bits = window.location.hash.slice(2).split('/');
 
+		// 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] ) ) && name.length ) {
+			// Find the slide with the specified name
+			var slide = document.querySelector( '#' + name );
+
+			if( slide ) {
+				// Find the position of the named slide and navigate to it
+				var indices = Reveal.getIndices( slide );
+				navigateTo( indices.h, indices.v );
+			}
+			// If the slide doesn't exist, navigate to the current slide
+			else {
+				navigateTo( indexh, indexv );
+			}
+		}
+		else {
 			// Read the index components of the hash
-		var h = parseInt( bits[0] ) || 0 ;
+			var h = parseInt( bits[0] ) || 0,
-		var v = parseInt( bits[1] ) || 0 ;
+				v = parseInt( bits[1] ) || 0;
 
 			navigateTo( h, v );
 		}
+	}
 	
 	/**
 	 * Updates the page URL (hash) to reflect the current
@@ -1049,12 +1070,30 @@ var Reveal = (function(){
 		addEventListeners: addEventListeners,
 		removeEventListeners: removeEventListeners,
 
-		// Returns the indices of the current slide
+		// Returns the indices of the current, or specified, slide
-		getIndices: function() {
+		getIndices: function( slide ) {
-			return { 
+			// By default, return the current indices
-				h: indexh, 
+			var h = indexh,
-				v: indexv 
+				v = indexv;
-			};
+
+			// If a slide is specified, return the indices of that slide
+			if( slide ) {
+				var isVertical = !!slide.parentNode.nodeName.match( /section/gi );
+				var slideh = isVertical ? slide.parentNode : slide;
+
+				// Select all horizontal slides
+				var horizontalSlides = Array.prototype.slice.call( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
+
+				// Now that we know which the horizontal slide is, get its index
+				h = Math.max( horizontalSlides.indexOf( slideh ), 0 );
+
+				// If this is a vertical slide, grab the vertical index
+				if( isVertical ) {
+					v = Math.max( Array.prototype.slice.call( slide.parentNode.children ).indexOf( slide ), 0 );
+				}
+			}
+
+			return { h: h, v: v };
 		},
 
 		// Returns the previous slide element, may be null

js/reveal.min.js

@@ -1,5 +1,5 @@
 /*!
- * reveal.js 2.0 r19
+ * reveal.js 2.0 r20
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  * 
@@ -51,7 +51,8 @@ c=ab(b,an===undefined?c:an);stateLoop:for(var ah=0,ak=ac.length;ah<ak;ah++){for(
 }else{w=null;}if(w){w.classList.remove("present");}}function q(){if(!N.controls||!d.controls){return;}var ad=f();[d.controlsLeft,d.controlsRight,d.controlsUp,d.controlsDown].forEach(function(ae){ae.classList.remove("enabled");
 });if(ad.left){d.controlsLeft.classList.add("enabled");}if(ad.right){d.controlsRight.classList.add("enabled");}if(ad.up){d.controlsUp.classList.add("enabled");
 }if(ad.down){d.controlsDown.classList.add("enabled");}}function f(){var ad=document.querySelectorAll(k);var ae=document.querySelectorAll(b);return{left:l>0,right:l<ad.length-1,up:c>0,down:c<ae.length-1};
-}function H(){var af=window.location.hash.slice(2).split("/");var ae=parseInt(af[0])||0;var ad=parseInt(af[1])||0;L(ae,ad);}function g(){if(N.history){var ad="/";
+}function H(){var ai=window.location.hash;var ah=ai.slice(2).split("/"),af=ai.replace(/#|\//gi,"");if(isNaN(parseInt(ah[0]))&&af.length){var ad=document.querySelector("#"+af);
+if(ad){var aj=Reveal.getIndices(ad);L(aj.h,aj.v);}else{L(l,c);}}else{var ag=parseInt(ah[0])||0,ae=parseInt(ah[1])||0;L(ag,ae);}}function g(){if(N.history){var ad="/";
 if(l>0||c>0){ad+=l;}if(c>0){ad+="/"+c;}window.location.hash=ad;}}function p(ae,ad){var af=document.createEvent("HTMLEvents",1,2);af.initEvent(ae,true,true);
 r(af,ad);d.wrapper.dispatchEvent(af);}function t(){if(document.querySelector(b+".present")){var ae=document.querySelectorAll(b+".present .fragment:not(.visible)");
 if(ae.length){ae[0].classList.add("visible");p("fragmentshown",{fragment:ae[0]});return true;}}else{var ad=document.querySelectorAll(k+".present .fragment:not(.visible)");
@@ -61,8 +62,9 @@ if(ad.length){ad[ad.length-1].classList.remove("visible");p("fragmenthidden",{fr
 if(N.autoSlide){j=setTimeout(v,N.autoSlide);}}function L(ae,ad){a(ae,ad);}function z(){if(V()||M()===false){a(l-1,0);}}function i(){if(V()||t()===false){a(l+1,0);
 }}function s(){if(V()||M()===false){a(l,c-1);}}function D(){if(V()||t()===false){a(l,c+1);}}function U(){if(M()===false){if(f().up){s();}else{var ad=document.querySelector(".reveal .slides>section.past:nth-child("+l+")");
 if(ad){c=(ad.querySelectorAll("section").length+1)||0;l--;a();}}}}function v(){if(t()===false){f().down?D():i();}K();}function T(){if(V()){Y();}else{G();
-}}return{initialize:h,navigateTo:L,navigateLeft:z,navigateRight:i,navigateUp:s,navigateDown:D,navigatePrev:U,navigateNext:v,toggleOverview:T,addEventListeners:C,removeEventListeners:Q,getIndices:function(){return{h:l,v:c};
+}}return{initialize:h,navigateTo:L,navigateLeft:z,navigateRight:i,navigateUp:s,navigateDown:D,navigatePrev:U,navigateNext:v,toggleOverview:T,addEventListeners:C,removeEventListeners:Q,getIndices:function(ad){var ah=l,af=c;
-},getPreviousSlide:function(){return w;},getCurrentSlide:function(){return E;},getQueryHash:function(){var ad={};location.search.replace(/[A-Z0-9]+?=(\w*)/gi,function(ae){ad[ae.split("=").shift()]=ae.split("=").pop();
+if(ad){var ai=!!ad.parentNode.nodeName.match(/section/gi);var ag=ai?ad.parentNode:ad;var ae=Array.prototype.slice.call(document.querySelectorAll(k));ah=Math.max(ae.indexOf(ag),0);
-});return ad;},addEventListener:function(ae,af,ad){if("addEventListener" in window){(d.wrapper||document.querySelector(".reveal")).addEventListener(ae,af,ad);
+if(ai){af=Math.max(Array.prototype.slice.call(ad.parentNode.children).indexOf(ad),0);}}return{h:ah,v:af};},getPreviousSlide:function(){return w;},getCurrentSlide:function(){return E;
-}},removeEventListener:function(ae,af,ad){if("addEventListener" in window){(d.wrapper||document.querySelector(".reveal")).removeEventListener(ae,af,ad);
+},getQueryHash:function(){var ad={};location.search.replace(/[A-Z0-9]+?=(\w*)/gi,function(ae){ad[ae.split("=").shift()]=ae.split("=").pop();});return ad;
+},addEventListener:function(ae,af,ad){if("addEventListener" in window){(d.wrapper||document.querySelector(".reveal")).addEventListener(ae,af,ad);}},removeEventListener:function(ae,af,ad){if("addEventListener" in window){(d.wrapper||document.querySelector(".reveal")).removeEventListener(ae,af,ad);
 }}};})();