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   1  /*
   2  ---
   3  
   4  script: Fx.SmoothScroll.js
   5  
   6  name: Fx.SmoothScroll
   7  
   8  description: Class for creating a smooth scrolling effect to all internal links on the page.
   9  
  10  license: MIT-style license
  11  
  12  authors:
  13    - Valerio Proietti
  14  
  15  requires:
  16    - Core/Selectors
  17    - /Fx.Scroll
  18  
  19  provides: [Fx.SmoothScroll]
  20  
  21  ...
  22  */
  23  
  24  var SmoothScroll = Fx.SmoothScroll = new Class({
  25  
  26      Extends: Fx.Scroll,
  27  
  28      initialize: function(options, context){
  29          context = context || document;
  30          this.doc = context.getDocument();
  31          var win = context.getWindow();
  32          this.parent(this.doc, options);
  33          this.links = $$(this.options.links || this.doc.links);
  34          var location = win.location.href.match(/^[^#]*/)[0] + '#';
  35          this.links.each(function(link){
  36              if (link.href.indexOf(location) != 0) {return;}
  37              var anchor = link.href.substr(location.length);
  38              if (anchor) this.useLink(link, anchor);
  39          }, this);
  40          if (!Browser.Engine.webkit419) {
  41              this.addEvent('complete', function(){
  42                  win.location.hash = this.anchor;
  43              }, true);
  44          }
  45      },
  46  
  47      useLink: function(link, anchor){
  48          var el;
  49          link.addEvent('click', function(event){
  50              if (el !== false && !el) el = document.id(anchor) || this.doc.getElement('a[name=' + anchor + ']');
  51              if (el) {
  52                  event.preventDefault();
  53                  this.anchor = anchor;
  54                  this.toElement(el).chain(function(){
  55                      this.fireEvent('scrolledTo', [link, el]);
  56                  }.bind(this));
  57                  link.blur();
  58              }
  59          }.bind(this));
  60      }
  61  });