/*
Stylish Select 0.4.1 - $ plugin to replace a select drop down box with a stylable unordered list
http://scottdarby.com/

Requires: jQuery 1.3 or newer

Contributions from Justin Beasley: http://www.harvest.org/ & Anatoly Ressin: http://www.artazor.lv/

Dual licensed under the MIT and GPL licenses.

*/

(function($){
	//add class of js to html tag
	$('html').addClass('stylish-select');
	
	//create cross-browser indexOf
	Array.prototype.indexOf = function(obj, start){
		for (var i = (start || 0); i < this.length; i++) {
			if (this[i] == obj) {
				return i;
			}
		}
	}
	
	//utility methods
	$.fn.extend({
		getSetSSValue: function(value){
			if (value) {
				//set value and trigger change event
				$(this).val(value).change();
				return this;
			}
			else {
				return $(this).find(':selected').val();
			}
		},
		//added by Justin Beasley
		resetSS: function(){
			var oldOpts = $(this).data('ssOpts');
			$this = $(this);
			$this.next().remove();
			//unbind all events and redraw
			$this.unbind().sSelect(oldOpts);
		}
	});
	
	$.fn.sSelect = function(options){
	
		return this.each(function(){
		
			var defaults = {
				defaultText: 'Please select',
				animationSpeed: 0, //set speed of dropdown
				ddMaxHeight: '' //set css max-height value of dropdown
			};
			
			//initial variables
			var opts = $.extend(defaults, options), $input = $(this), $containerDivText = $('<div class="selectedTxt"></div>'), $containerDiv = $('<div class="newListSelected" tabindex="0"></div>'), $newUl = $('<ul class="newList"></ul>'), itemIndex = -1, currentIndex = -1, keys = [], prevKey = false, prevented = false, $newLi;
			
			//added by Justin Beasley
			$(this).data('ssOpts', options);
			
			//build new list
			$containerDiv.insertAfter($input);
			$containerDivText.prependTo($containerDiv);
			$newUl.appendTo($containerDiv);
			$input.hide();
			
			//test for optgroup
			if ($input.children('optgroup').length == 0) {
				$input.children().each(function(i){
					var option = $(this).text();
					var key = $(this).val();
					
					//add first letter of each word to array
					keys.push(option.charAt(0).toLowerCase());
					if ($(this).attr('selected') == true) {
						opts.defaultText = option;
						currentIndex = i;
					}
					$newUl.append($('<li><a href="JavaScript:void(0);">' + option + '</a></li>').data('key', key));
					
				});
				//cache list items object
				$newLi = $newUl.children().children();
				
			}
			else { //optgroup
				$input.children('optgroup').each(function(){
				
					var optionTitle = $(this).attr('label'), $optGroup = $('<li class="newListOptionTitle">' + optionTitle + '</li>');
					
					$optGroup.appendTo($newUl);
					
					var $optGroupList = $('<ul></ul>');
					
					$optGroupList.appendTo($optGroup);
					
					$(this).children().each(function(){
						++itemIndex;
						var option = $(this).text();
						var key = $(this).val();
						//add first letter of each word to array
						keys.push(option.charAt(0).toLowerCase());
						if ($(this).attr('selected') == true) {
							opts.defaultText = option;
							currentIndex = itemIndex;
						}
						$optGroupList.append($('<li><a href="JavaScript:void(0);">' + option + '</a></li>').data('key', key));
					})
				});
				//cache list items object
				$newLi = $newUl.find('ul li a');
			}
			
			//get heights of new elements for use later
			var newUlHeight = $newUl.height(), containerHeight = $containerDiv.height(), newLiLength = $newLi.length;
			
			//check if a value is selected
			if (currentIndex != -1) {
				navigateList(currentIndex, true);
			}
			else {
				//set placeholder text
				$containerDivText.text(opts.defaultText);
			}
			
			//decide if to place the new list above or below the drop-down
			function newUlPos(){
				var containerPosY = $containerDiv.offset().top, docHeight = jQuery(window).height(), scrollTop = jQuery(window).scrollTop();
				
				//if height of list is greater then max height, set list height to max height value
				if (newUlHeight > parseInt(opts.ddMaxHeight)) {
				//newUlHeight = parseInt(opts.ddMaxHeight);
				}
				
				containerPosY = containerPosY - scrollTop;
				if (containerPosY + newUlHeight >= docHeight) {
					$newUl.css({
						top: '-' + newUlHeight + 'px'//,
					//height: newUlHeight
					});
					$input.onTop = true;
				}
				else {
					$newUl.css({
						top: containerHeight + 'px'//,
					//height: newUlHeight
					});
					$input.onTop = false;
				}
			}
			
			//run function on page load
			newUlPos();
			
			//run function on browser window resize
			$(window).resize(function(){
				newUlPos();
			});
			
			$(window).scroll(function(){
				newUlPos();
			});
			
			//positioning
			function positionFix(){
				$containerDiv.css('position', 'relative');
			}
			
			function positionHideFix(){
				$containerDiv.css('position', 'static');
			}
			
			$containerDivText.click(function(event){
			
				event.stopPropagation();
				
				//hide all menus apart from this one
				$('.newList').not($(this).next()).hide().parent().removeClass('newListSelFocus');
				
				//show/hide this menu
				$newUl.toggle();
				positionFix();
				//scroll list to selected item
				$newLi.eq(currentIndex).focus();
				
				
			});
			
			$newLi.click(function(e){
			
				var $clickedLi = $(e.target);
				
				//update counter
				currentIndex = $newLi.index($clickedLi);
				
				//remove all hilites, then add hilite to selected item
				prevented = true;
				navigateList(currentIndex);
				$newUl.hide();
				$containerDiv.css('position', 'static');//ie
			});
			
			$newLi.hover(function(e){
				var $hoveredLi = $(e.target);
				$hoveredLi.addClass('newListHover');
			}, function(e){
				var $hoveredLi = $(e.target);
				$hoveredLi.removeClass('newListHover');
			});
			
			function navigateList(currentIndex, init){
				$newLi.removeClass('hiLite').eq(currentIndex).addClass('hiLite');
				
				if ($newUl.is(':visible')) {
					$newLi.eq(currentIndex).focus();
				}
				
				var text = $newLi.eq(currentIndex).text();
				var val = $newLi.eq(currentIndex).parent().data('key');
				
				//page load
				if (init == true) {
					$input.val(val);
					$containerDivText.text(text);
					return false;
				}
				
				$input.val(val)
				$input.change();
				$containerDivText.text(text);
			};
			
			$input.change(function(event){
				$targetInput = $(event.target);
				//stop change function from firing
				if (prevented == true) {
					prevented = false;
					return false;
				}
				$currentOpt = $targetInput.find(':selected');
				
				//currentIndex = $targetInput.find('option').index($currentOpt);
				currentIndex = $targetInput.find('option').index($currentOpt);
				
				
				navigateList(currentIndex, true);
			});
			
			//handle up and down keys
			function keyPress(element){
				//when keys are pressed
				element.onkeydown = function(e){
					var keycode;
					if (e == null) { //ie
						keycode = event.keyCode;
					}
					else { //everything else
						keycode = e.which;
					}
					
					//prevent change function from firing
					prevented = true;
					
					switch (keycode) {
						case 40: //down
						case 39: //right
							incrementList();
							return false;
							break;
						case 38: //up
						case 37: //left
							decrementList();
							return false;
							break;
						case 33: //page up
						case 36: //home
							gotoFirst();
							return false;
							break;
						case 34: //page down
						case 35: //end
							gotoLast();
							return false;
							break;
						case 13:
						case 27:
							$newUl.hide();
							positionHideFix();
							return false;
							break;
					}
					
					//check for keyboard shortcuts
					keyPressed = String.fromCharCode(keycode).toLowerCase();
					
					var currentKeyIndex = keys.indexOf(keyPressed);
					
					if (typeof currentKeyIndex != 'undefined') { //if key code found in array
						++currentIndex;
						currentIndex = keys.indexOf(keyPressed, currentIndex); //search array from current index
						if (currentIndex == -1 || currentIndex == null || prevKey != keyPressed) 
							currentIndex = keys.indexOf(keyPressed); //if no entry was found or new key pressed search from start of array
						navigateList(currentIndex);
						//store last key pressed
						prevKey = keyPressed;
						return false;
					}
				}
			}
			
			function incrementList(){
				if (currentIndex < (newLiLength - 1)) {
					++currentIndex;
					navigateList(currentIndex);
				}
			}
			
			function decrementList(){
				if (currentIndex > 0) {
					--currentIndex;
					navigateList(currentIndex);
				}
			}
			
			function gotoFirst(){
				currentIndex = 0;
				navigateList(currentIndex);
			}
			
			function gotoLast(){
				currentIndex = newLiLength - 1;
				navigateList(currentIndex);
			}
			
			$containerDiv.click(function(){
				keyPress(this);
			});
			
			$containerDiv.focus(function(){
				$(this).addClass('newListSelFocus');
				keyPress(this);
			});
			
			$containerDiv.blur(function(){
				$(this).removeClass('newListSelFocus');
			});
			
			//hide list on blur
			$('body').click(function(){
				$containerDiv.removeClass('newListSelFocus');
				$newUl.hide();
				positionHideFix();
			});
			
			//add classes on hover
			$containerDivText.hover(function(e){
				var $hoveredTxt = $(e.target);
				$hoveredTxt.parent().addClass('newListSelHover');
			}, function(e){
				var $hoveredTxt = $(e.target);
				$hoveredTxt.parent().removeClass('newListSelHover');
			});
			
			//reset left property and hide
			$newUl.css('left', '0').hide();
			
		});
		
	};
})(jQuery);