fix ToC scrolls off screen on articles (close #258)

AUTHORS

@@ -8,3 +8,4 @@ Google Inc.
 Matthew Butler <butler.matthew@gmail.com>
 Chris Buckett <chrisbuckett@gmail.com>
 Michael Haubenwallner <michael.haubenwallner@gmail.com>
+Victor Berchet <victor.berchet@gmail.com>

src/site/js/scripts.js

@@ -67,26 +67,39 @@ $(function() {
       target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
       var isnavtabs = $('.nav-tabs')[0];
       if (target.length && !isnavtabs) {
-        var scrollOffset = $('.navbar').outerHeight() + scrollPadding;
-        if(typeof $(this).data('slide') !== 'undefined') {
-          $('html,body').animate({
-            scrollTop: target.offset().top - scrollOffset
-          }, 1000);
-        }
-
-        window.location.hash = this.hash;
+        var hashPrefix = $(this).data('slide') ? "jsa-" : "js-";
+        window.location.hash = hashPrefix + this.hash.substr(1);
         return false;
       } else {
         window.location.hash = this.hash;
       }
     }
   });
+
+  var currentHash;
+  setInterval(
+    function() {
+      var match = window.location.hash.match(/^#js(a?)-(.*)$/);
+      if (match === null) {
+        return;
+      }
+      var target = $('a[name=' + match[2] + ']');
+      if (match[2] !== currentHash && target) {
+        var scrollOffset = $('.navbar').outerHeight() + scrollPadding;
+        $('html,body').animate({
+          scrollTop: target.offset().top - scrollOffset
+        }, match[1] ? 1000 : 1);
+        currentHash = match[2];
+      }
+    },
+    100
+  );
 });
 
 
 
 $(function(){
-  
+
   var popOpen = false;
 
   $('.dart-popover').popover();
@@ -110,7 +123,7 @@ $(function(){
     var targetTouch = $(touch.target);
     if(!navDisabled) {
       if(targetTouch[0] == navToggle[0] || targetTouch[0] == iconBar[0]) {
-        
+
         // iconBar.removeClass('collapsed');
       }
     } else {
@@ -125,10 +138,10 @@ $(function(){
       // iconBar.removeClass('collapsed');
     }
 
-    
+
   });
 
-  
+
   $(document).on('touchmove', function(e) {
     // console.log($(this).scrollTop(), lastScrollPosY);
     if($(this).scrollTop() != lastScrollPosY) {
@@ -174,17 +187,17 @@ $(function(){
     e.preventDefault();
     if (popOpen) {
       $('.dart-popover').not(this).popover('hide');
-    } 
+    }
     popOpen = true;
 
   });
 
-  
+
 
   // Adding the navigation to the popup
   // $("a.dart-popover").each(function(index) {
   //   var lnk = $(this);
-    
+
   //   // Add prev and nex buttons
   //   if ( lnk == $('.lang-dart:first-child a.dart-popover') ) {
   //     //console.log('first');