Merge pull request #2133 from sean-parent/master

Adding support for hash linked slideNumber

js/reveal.js

@@ -68,6 +68,10 @@
 
 			// Display the page number of the current slide
 			slideNumber: false,
+			
+			// Use 1 based indexing for # links to match slide number (default is zero
+			// based)
+			hashOneBasedIndex: false,
 
 			// Determine which displays to show the slide number on
 			showSlideNumber: 'all',
@@ -2251,7 +2255,41 @@
 		return overview;
 
 	}
+	
+	/**
+	 * Return a hash URL that will resolve to the current slide location.
+	 */
+	
+	function locationHash() {
+    
+    var url = '/';
+
+    // Attempt to create a named link based on the slide's ID
+		var id = currentSlide ? currentSlide.getAttribute( 'id' ) : null;
+    if( id ) {
+      id = encodeURIComponent( id );
+    }
+
+    var indexf;
+    if( config.fragmentInURL ) {
+      indexf = getIndices().f;
+    }
+
+    // If the current slide has an ID, use that as a named link,
+    // but we don't support named links with a fragment index
+    if( typeof id === 'string' && id.length && indexf === undefined ) {
+      url = '/' + id;
+    }
+    // Otherwise use the /h/v index
+    else {
+      if( indexh > 0 || indexv > 0 || indexf !== undefined ) url += indexh + config.hashOneBasedIndex;
+      if( indexv > 0 || indexf !== undefined ) url += '/' + (indexv + config.hashOneBasedIndex);
+      if( indexf !== undefined ) url += '/' + indexf;
+    }
 
+    return url;
+	}
+	
 	/**
 	 * Checks if the current or specified slide is vertical
 	 * (nested within another slide).
@@ -2917,6 +2955,7 @@
 
 	}
 
+
 	/**
 	 * Updates the slide number div to reflect the current slide.
 	 *
@@ -2970,14 +3009,18 @@
 	 * @return {string} HTML string fragment
 	 */
 	function formatSlideNumber( a, delimiter, b ) {
-
+		var url = '#' + locationHash();
 		if( typeof b === 'number' && !isNaN( b ) ) {
-			return  '<span class="slide-number-a">'+ a +'</span>' +
+			return  '<a href="' + url + '">' +
+					'<span class="slide-number-a">'+ a +'</span>' +
 					'<span class="slide-number-delimiter">'+ delimiter +'</span>' +
-					'<span class="slide-number-b">'+ b +'</span>';
+					'<span class="slide-number-b">'+ b +'</span>' +
+					'</a>';
 		}
 		else {
-			return '<span class="slide-number-a">'+ a +'</span>';
+			return '<a href="' + url + '">' +
+			       '<span class="slide-number-a">'+ a +'</span>' +
+			       '</a>';
 		}
 
 	}
@@ -3796,8 +3839,9 @@
 		}
 		else {
 			// Read the index components of the hash
-			var h = parseInt( bits[0], 10 ) || 0,
-				v = parseInt( bits[1], 10 ) || 0,
+
+			var h = parseInt( bits[0], 10 ) || 0 - config.hashOneBasedIndex,
+				v = parseInt( bits[1], 10 ) || 0 - config.hashOneBasedIndex,
 				f;
 			if( config.fragmentInURL ) {
 				f = parseInt( bits[2], 10 );
@@ -3812,7 +3856,7 @@
 		}
 
 	}
-
+	
 	/**
 	 * Updates the page URL (hash) to reflect the current
 	 * state.
@@ -3832,32 +3876,7 @@
 				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 = encodeURIComponent( id );
-				}
-
-				var indexf;
-				if( config.fragmentInURL ) {
-					indexf = getIndices().f;
-				}
-
-				// If the current slide has an ID, use that as a named link,
-				// but we don't support named links with a fragment index
-				if( typeof id === 'string' && id.length && indexf === undefined ) {
-					url = '/' + id;
-				}
-				// Otherwise use the /h/v index
-				else {
-					if( indexh > 0 || indexv > 0 || indexf !== undefined ) url += indexh;
-					if( indexv > 0 || indexf !== undefined ) url += '/' + indexv;
-					if( indexf !== undefined ) url += '/' + indexf;
-				}
-
-				window.location.hash = url;
+				window.location.hash = locationHash();
 			}
 		}