/*

*

* 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

*

* Visit http://www.ihwy.com/labs/jquery-listnav-plugin.aspx for more information.

*

* Dual licensed under the MIT and GPL licenses:

*   http://www.opensource.org/licenses/mit-license.php

*   http://www.gnu.org/licenses/gpl.html

*

*/



(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;

			id = this.id;

			$wrapper = $('#' + id + '-nav'); // user must abide by the convention: <ul id="myList"> for list and <div id="myList-nav"> for nav wrapper

			$list = $(this);



			var counts = {}, allCount = 0, isAll = true, numCount = 0, prevLetter = '';



			function init() {

				$wrapper.append(createLettersHtml());



				$letters = $('.ln-letters', $wrapper).slice(0, 1); // will always be a single item

				if (opts.showCounts) $letterCount = $('.ln-letter-count', $wrapper).slice(0, 1); // will always be a single item



				addClasses();

				addNoMatchLI();

				if (opts.flagDisabled) addDisabledClass();

				bindHandlers();



				if (!opts.includeAll) $list.show(); // show the list in case the recommendation for includeAll=false was taken



				// remove nav items we don't need

				//

				if (!opts.includeAll) $('.all', $letters).remove();

				if (!opts.includeNums) $('._', $letters).remove();

				if (!opts.includeOther) $('.-', $letters).remove();



				$(':last', $letters).addClass('ln-last'); // allows for styling a case where last item needs right border set (because items before that only have top, left and bottom so that border between items isn't doubled)

				

				if ($.cookie && (opts.cookieName != null)) {

					var cookieLetter = $.cookie(opts.cookieName);

					if (cookieLetter != null) opts.initLetter = cookieLetter;

				}



				// decide what to show first

				//

				if (opts.initLetter != '') {

					firstClick = true;

					$('.' + opts.initLetter.toLowerCase(), $letters).slice(0, 1).click(); // click the initLetter if there was one

				}

				else {

					if (opts.includeAll) $('.all', $letters).addClass('ln-selected'); // showing all: we don't need to click this: the whole list is already loaded

					else { // ALL link is hidden, click the first letter that will display LI's

						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;

							}

						}

					}

				}

			}



			// positions the letter count div above the letter links (so we only have to do it once: after this we just change it's left position via mouseover)

			//

			function setLetterCountTop() {

				$letterCount.css({ top: ($('.a', $letters).slice(0, 1).offset({ margin: false, border: true }).top - $letterCount.outerHeight({ margin: true }) )-95 }); // note: don't set top based on '.all': it might not be visible

				//LARRY CUSTOM EDIT: ABOVE CODE NOT WORKING

				//$letterCount.css("top",110);

			}



			// adds a class to each LI that has text content inside of it (ie, inside an <a>, a <div>, nested DOM nodes, etc)

			//

			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 = '-'; // not A-Z, a-z or 0-9, so considered "other"

				if (!isNaN(firstChar)) firstChar = '_'; // use '_' if the first char is a number

				$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; // some letters may not have a count in the hash

				}

			}



			function bindHandlers() {



				// sets the top position of the count div in case something above it on the page has resized

				//

				if (opts.showCounts) {

					$wrapper.mouseover(function() {

						setLetterCountTop();

					});

				}



				// mouseover for each letter: shows the count above the letter

				//

				if (opts.showCounts) {

					$('a', $letters).mouseover(function() {

						var left = $(this).position().left;

						var width = ($(this).outerWidth({ margin: true }) - 1) + 'px'; // the -1 is to tweak the width a bit due to a seeming inaccuracy in jquery ui/dimensions outerWidth (same result in FF2 and IE6/7)

						var count = getLetterCount(this);

						$letterCount.css({ left: left, width: width }).text(count).show(); // set left position and width of letter count, set count text and show it

					});



					// mouseout for each letter: hide the count

					//

					$('a', $letters).mouseout(function() {

						$letterCount.hide();

					});

				}



				// click handler for letters: shows/hides relevant LI's

				//

				$('a', $letters).click(function() {

					$('a.ln-selected', $letters).removeClass('ln-selected');



					var letter = $(this).attr('class').split(' ')[0];



					if (letter == 'all') {

						$list.children().show();

						$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(); // in case it's showing

							$list.children('.ln-' + letter).show();

						}

						else $list.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;

				});

			}



			// creates the HTML for the letter links

			//	

			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>' : ''); // the styling for ln-letter-count is to give us a starting point for the element, which will be repositioned when made visible (ie, should not need to be styled by the user)

			}



			init();

		});

	};



	$.fn.listnav.defaults = {

		initLetter: '',

		includeAll: true,

		incudeOther: false,

		includeNums: true,

		flagDisabled: true,

		noMatchText: 'No matching entries',

		showCounts: true,

		cookieName: null,

		onClick: null,

		prefixes: []

	};

})(jQuery);