/* encoding: utf-8

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

Version: 1.0

Copyright (c) 2009
Már Örlygsson  (http://mar.anomy.net/)  &
Hugsmiðjan 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']  });

// Explicitly use all plugins:
jQuery('.articlebody').linkify('*');
jQuery('.articlebody').linkify({  use: '*'  });
jQuery('.articlebody').linkify({  use: ['*']  });

// Use no plugins:
jQuery('.articlebody').linkify('');
jQuery('.articlebody').linkify({  use: ''  });
jQuery('.articlebody').linkify({  use: []  });
jQuery('.articlebody').linkify({  use: ['']  });

// Perfmorm actions on all newly created links:
jQuery('.articlebody').linkify( function (links){ links.addClass('linkified'); } );
jQuery('.articlebody').linkify({  handleLinks: function (links){ links.addClass('linkified'); }  });

*/

(function ($) {

	var noProtocolUrl = /(^|["'(\s]|&lt;)(www\..+?\..+?)((?:[:?]|\.+)?(?:\s|$)|&gt;|[)"',])/g,
      httpOrMailtoUrl = /(^|["'(\s]|&lt;)((?:(?:https?|ftp):\/\/|mailto:).+?)((?:[:?]|\.+)?(?:\s|$)|&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>$3')
                      .replace(/"<``>/g, '"http');  // reinsert `"http`
      },


      linkify = $.fn.linkify = function (cfg) {
      	if (!$.isPlainObject(cfg)) {
      		cfg = {
      			use: (typeof cfg == 'string') ? cfg : undefined,
      			handleLinks: $.isFunction(cfg) ? cfg : arguments[1]
      		};
      	}
      	var use = cfg.use,
              allPlugins = linkify.plugins || {},
              plugins = [linkifier],
              tmpCont,
              newLinks = [],
              callback = cfg.handleLinks;
      	if (use == undefined || use == '*') // use === undefined  ||  use === null
      	{
      		for (var name in allPlugins) {
      			plugins.push(allPlugins[name]);
      		}
      	}
      	else {
      		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);
      			}
      		}
      	}

      	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;
      					if (callback) {
      						html = $('<div/>').html(html);
      						//newLinks.push.apply( newLinks,  html.find('a').toArray() );
      						newLinks = newLinks.concat(html.find('a').toArray().reverse());
      						html = html.contents();
      					}
      					htmlChanged && $(n).after(html).remove();
      				}
      			}
      			else if (n.nodeType == 1 && !/^(a|button|textarea)$/i.test(n.tagName)) {
      				arguments.callee.call(n);
      			}
      		};
      	});
      	callback && callback($(newLinks.reverse()));
      	return this;
      };

	linkify.plugins = {
		// default mailto: plugin
		mailto: {
			re: /(^|["'(\s]|&lt;)([^"'(\s&]+?@.+\.[a-z]{2,7})(([:?]|\.+)?(\s|$)|&gt;|[)"',])/gi,
			tmpl: '$1<a href="mailto:$2">$2</a>$3'
		}
	};

})(jQuery);