/*
*
* jQuery listnav plugin
* Copyright (c) 2009 iHwy, Inc.
* Author: Jack Killpatrick
*
* Version 2.1 (08/09/2009)
* Requires jQuery 1.3.2, jquery 1.2.6 or jquery 1.2.x plus the jquery dimensions plugin
*
* Modified: Jonathan Lau 23.06.11
* Description: Adds additional directory nav structure based on headings and linked via anchors + assigns a css class on every odd entry in a collection; changes denoted by my initials.
*/

(function($) {
	$.fn.listnav = function(options) {
		var opts = $.extend({},$.fn.listnav.defaults, options);var letters = ['_','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','-'];var firstClick=false;opts.prefixes = $.map(opts.prefixes,function(n){return n.toLowerCase();});return this.each(function(){
			var $wrapper,list,$list,$letters,$letterCount,id,$dir;/*JL*/; id = this.id; $wrapper = $('#' + id + '-nav'); $list = $(this); var counts = {}, allCount = 0, isAll = true, numCount = 0, prevLetter='';function init(){
				if(opts.includeDir){$list.before('<ul id="directory-nav">'+createDirectory()+'</ul>');/*JL*/$dir=$("#directory-nav");/*JL*/};$wrapper.append(createLettersHtml());$letters = $('.ln-letters',$wrapper).slice(0, 1);if(opts.showCounts)$letterCount = $('.ln-letter-count', $wrapper).slice(0, 1);$list=$list.add($dir);/*JL*/addClasses();addNoMatchLI();if(opts.flagDisabled)addDisabledClass();bindHandlers();if(!opts.includeAll)$list.show();if(!opts.includeAll)$('.all', $letters).remove();if(!opts.includeNums) $('._', $letters).remove();if(!opts.includeOther)$('.-', $letters).remove();$(':last', $letters).addClass('ln-last');if($.cookie && (opts.cookieName != null)){var cookieLetter = $.cookie(opts.cookieName);if(cookieLetter != null) opts.initLetter = cookieLetter;}
				if(opts.initLetter != ''){firstClick = true; $('.' + opts.initLetter.toLowerCase(), $letters).slice(0, 1).click();}
				else{if(opts.includeAll)$('.all', $letters).addClass('ln-selected');else{for(var i=((opts.includeNums) ? 0 : 1);i < letters.length;i++){if(counts[letters[i]] > 0){ firstClick = true; $('.' + letters[i], $letters).slice(0, 1).click();break;}}}}
			}
			function setLetterCountTop() { $letterCount.css({ top: $('.a', $letters).slice(0, 1).offset({ margin: false, border: true}).top - $letterCount.outerHeight({ margin: true })});}
			function addClasses() {
				var str,firstChar,firstWord,spl,$this,hasPrefixes=(opts.prefixes.length > 0);$($list).children().each(function(){
					$this = $(this), firstChar = '', str = $.trim($this.text()).toLowerCase();if(str != ''){
						if(hasPrefixes){spl = str.split(' ');if((spl.length > 1)&&($.inArray(spl[0], opts.prefixes) > -1)){firstChar = spl[1].charAt(0); addLetterClass(firstChar, $this, true);}}
						firstChar=str.charAt(0); addLetterClass(firstChar,$this);
					} 
				});
			}
			function addLetterClass(firstChar, $el, isPrefix) {if(/\W/.test(firstChar)) firstChar = '-';if(!isNaN(firstChar)) firstChar = '_'; $el.addClass('ln-' + firstChar);if(counts[firstChar] == undefined)counts[firstChar] = 0;counts[firstChar]++;if(!isPrefix) allCount++;}
			function addDisabledClass(){for(var i = 0; i < letters.length; i++) {if(counts[letters[i]] == undefined) $('.' + letters[i], $letters).addClass('ln-disabled');}}
			function addNoMatchLI(){ $list.append('<li class="ln-no-match" style="display:none">' + opts.noMatchText + '</li>'); }
			function getLetterCount(el){if($(el).hasClass('all'))return allCount; else{ var count = counts[$(el).attr('class').split(' ')[0]]; return (count != undefined) ? count : 0;}}
			function bindHandlers(){
				if(opts.showCounts){$wrapper.mouseover(function(){setLetterCountTop();});}
				if(opts.showCounts){$('a', $letters).mouseover(function(){ var left = $(this).position().left;var width=($(this).outerWidth({ margin: true }) - 1) + 'px'; var count = getLetterCount(this);$letterCount.css({ left: left, width: width }).text(count).show();});$('a', $letters).mouseout(function(){$letterCount.hide(); });}
				$('a', $letters).click(function() {
					$('a.ln-selected', $letters).removeClass('ln-selected');$list.removeClass("hide").children().removeClass("omega");/*JL*/var letter = $(this).attr('class').split(' ')[0];if(letter == 'all'){$list.each(function(i){$(this, i).children().show().filter(":odd").addClass("omega");});/*JL*/;$list.children('.ln-no-match').hide();isAll = true;}else{
						if(isAll){$list.children().hide(); isAll = false; }else if(prevLetter != '')$list.children('.ln-' + prevLetter).hide(); var count = getLetterCount(this); if (count > 0){$list.children('.ln-no-match').hide();$list.each(function(i){$(this, i).children('.ln-' + letter).show().filter(":odd").addClass("omega");});/*JL*/}
						else $list.filter("#directory-nav").addClass("hide").end().children('.ln-no-match').show();prevLetter = letter;
					}
					if($.cookie && (opts.cookieName != null))$.cookie(opts.cookieName, letter);$(this).addClass('ln-selected');$(this).blur();if(!firstClick && (opts.onClick != null)) opts.onClick(letter);else firstClick = false; return false;
				});
			}
			function createLettersHtml(){
				var html = [];for(var i = 1; i < letters.length; i++){if(html.length == 0) html.push('<a class="all" href="#">ALL</a><a class="_" href="#">0-9</a>'); html.push('<a class="' + letters[i] + '" href="#">' + ((letters[i] == '-') ? '...' : letters[i].toUpperCase()) + '</a>');}
				return '<div class="ln-letters">' + html.join('') + '</div>' + ((opts.showCounts) ? '<div class="ln-letter-count" style="display:none; position:absolute; top:0; left:0; width:20px;">0</div>' : '');
			}
			function createDirectory() {
				var html = [];var $li = $list.children(),$h = $li.find("h2");
				for(i=0;i<$h.length;i++){html.push('<li><a href="#'+$li[i].id+'">'+$h[i].childNodes[0].nodeValue+'</a></li>');}return html.join('');
			}
			init();
		});
	}; $.fn.listnav.defaults={initLetter: '',includeAll: true,incudeOther: false,includeNums: true,flagDisabled: true,noMatchText: 'No matching entries',showCounts: true,cookieName: null,onClick: null,prefixes: [],includeDir: true};
})(jQuery);