/* encoding: utf-8

**** linkify plugin for jQuery - automatically finds and changes URLs in text content into proper hyperlinks ****

Version: 1.0

Copyright (c) 2009
M‡r …rlygsson (http://mar.anomy.net/) &
Hugsmi?jan ehf. (http://www.hugsmidjan.is)

Dual licensed under a MIT licence (http://en.wikipedia.org/wiki/MIT_License)
and GPL 2.0 or above (http://www.gnu.org/licenses/old-licenses/gpl-2.0.html).

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Demo and Qunit-tests:
* <./jquery.linkify-1.0-demo.html>
* <./jquery.linkify-1.0-test.html>

Documentation:
* ...

Get updates from:
* <http://github.com/maranomynet/linkify/>
* <git://github.com/maranomynet/linkify.git>

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Requires:
* jQuery (1.2.6 or later)

Usage:

jQuery('.articlebody').linkify();

// adding plugins:
jQuery.extend( jQuery.fn.linkify.plugins, {
name1: {
re: RegExp
tmpl: String/Function
},
name2: function(html){ return html; }
});

// Uses all plugins by default:
jQuery('.articlebody').linkify();
// Use only certain plugins:
jQuery('.articlebody').linkify('name1,name2');
jQuery('.articlebody').linkify({ use: 'name1,name2' });
jQuery('.articlebody').linkify({ use: ['name1','name2'] });

*/

(function($){

  var noProtocolUrl = /(^|["'(]|&lt;|\s)(www\..+?\..+?)(([:?]|\.+)?(\s|$)|&gt;|[)"',])/g,
      httpOrMailtoUrl = /(^|["'(]|&lt;|\s)(((https?|ftp):\/\/|mailto:).+?)(([:?]|\.+)?(\s|$)|&gt;|[)"',])/g,
      linkifier = function ( html ) {
          return html
                      .replace( noProtocolUrl, '$1<a href="<``>://$2">$2</a>$3' ) // NOTE: we escape `"http` as `"<``>` to make sure `httpOrMailtoUrl` below doesn't find it as a false-positive
                      .replace( httpOrMailtoUrl, '$1<a href="$2">$2</a>$5' )
                      .replace( /"<``>/g, '"http' ); // reinsert `"http`
        },


      linkify = $.fn.linkify = function ( cfg ) {
          cfg = cfg || {};
          if ( typeof cfg == 'string' )
          {
            cfg = { use:cfg };
          }
          var use = cfg.use,
              allPlugins = linkify.plugins || {},
              plugins = [linkifier],
              tmpCont;
          if ( use )
          {
            use = $.isArray( use ) ? use : $.trim(use).split( / *, */ );
            var plugin,
                name;
            for ( var i=0, l=use.length; i<l; i++ )
            {
              name = use[i];
              plugin = allPlugins[name];
              if ( plugin )
              {
                plugins.push( plugin );
              }
            }
          }
          else
          {
            for ( var name in allPlugins )
            {
              plugins.push( allPlugins[name] );
            }
          }

          return this.each(function () {
              var childNodes = this.childNodes,
                  i = childNodes.length;
              while ( i-- )
              {
                var n = childNodes[i];
                if ( n.nodeType == 3 )
                {
                  var html = n.nodeValue;
                  if ( html.length>1 && /\S/.test(html) )
                  {
                    var htmlChanged,
                        preHtml;
                    tmpCont = tmpCont || $('<div/>')[0];
                    tmpCont.innerHTML = '';
                    tmpCont.appendChild( n.cloneNode(false) );
                    var tmpContNodes = tmpCont.childNodes;

                    for (var j=0, plugin; (plugin = plugins[j]); j++)
                    {
                      var k = tmpContNodes.length,
                          tmpNode;
                      while ( k-- )
                      {
                        tmpNode = tmpContNodes[k];
                        if ( tmpNode.nodeType == 3 )
                        {
                          html = tmpNode.nodeValue;
                          if ( html.length>1 && /\S/.test(html) )
                          {
                            preHtml = html;
                            html = html
                                      .replace( /&/g, '&amp;' )
                                      .replace( /</g, '&lt;' )
                                      .replace( />/g, '&gt;' );
                            html = $.isFunction( plugin ) ?
                                        plugin( html ):
                                        html.replace( plugin.re, plugin.tmpl );
                            htmlChanged = htmlChanged || preHtml!=html;
                            preHtml!=html && $(tmpNode).after(html).remove();
                          }
                        }
                      }
                    }
                    html = tmpCont.innerHTML;
                    htmlChanged && $(n).after(html).remove();
                  }
                }
                else if ( n.nodeType == 1 && !/^(a|button|textarea)$/i.test(n.tagName) )
                {
                  arguments.callee.call( n );
                }
              };
          });
        };

  linkify.plugins = {};

})(jQuery);