/*
Stylish Select 0.3 - $ plugin to replace a select drop down box with a stylable unordered list
http://scottdarby.com/

Copyright (c) 2009 Scott Darby

Requires: $ 1.3

Licensed under the GPL license:
http://www.gnu.org/licenses/gpl.html
*/
(function($){

        //add class of js to html tag
        $('html').addClass('js');

        //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 selText = $(this).find(':selected').text();
                                                }
                                        },
                resetSS: function(){
                                                $this = $(this);
                                                $this.next().remove();
                                                //unbind all events and redraw
                                                $this.unbind().sSelect();
                                        }
        });

        $.fn.sSelect = function(options) {

                return this.each(function(){

                        var defaults = {
                                defaultText: 'Please select',
                                animationSpeed: 300, //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,
                                newListItems = '',
                                prevented = false;

                        //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 = $(this).text();
                                        //add first letter of each word to array
                                        keys.push(option.charAt(0).toLowerCase());
                                        if ($(this).attr('selected') == true){
                                                opts.defaultText = option;
                                                currentIndex = i;
                                        }
                                        newListItems += '<li>'+option+'</li>';
                                });
                                //add new list items to ul
                                $newUl.html(newListItems);
                                newListItems = '';
                                //cache list items object
                                var $newLi = $newUl.children();

                        } else { //optgroup
                                $input.children('optgroup').each(function(i){

                                        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 = $(this).text();
                                                //add first letter of each word to array
                                                keys.push(option.charAt(0).toLowerCase());
                                                if ($(this).attr('selected') == true){
                                                        opts.defaultText = option;
                                                        currentIndex = itemIndex;
                                                }
                                                newListItems += '<li>'+option+'</li>';
                                        })
                                        //add new list items to ul
                                        $optGroupList.html(newListItems);
                                        newListItems = '';
                                });
                                //cache list items object
                                var $newLi = $newUl.find('ul li');

                        }

                        //get heights of new elements for use later
                        var newUlHeight = $newUl.height()+3,
                                containerHeight = $containerDiv.height()+3,
                                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(){

                                if ($newUl.is(':visible')){
                                        $newUl.hide();
                                        positionHideFix()
                                        return false;
                                }

                                $containerDiv.focus();

                                //show list
                                $newUl.slideDown(opts.animationSpeed);
                                positionFix();
                                //scroll list to selected item
                                $newUl.scrollTop($input.liOffsetTop);

                        });


                        $newLi.hover(
                          function (e) {
                                var $hoveredLi = $(e.target);
                                $hoveredLi.addClass('newListHover');
                          },
                          function (e) {
                                var $hoveredLi = $(e.target);
                                $hoveredLi.removeClass('newListHover');
                          }
                        );

                        $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
                        });

                        function navigateList(currentIndex, init){

                                //get offsets
                                var containerOffsetTop = $containerDiv.offset().top,
                                        liOffsetTop = $newLi.eq(currentIndex).offset().top,
                                        ulScrollTop = $newUl.scrollTop();

                                //get distance of current li from top of list
                                if ($input.onTop == true){
                                        //if list is above select box, add max height value
                                        $input.liOffsetTop = (((liOffsetTop-containerOffsetTop)-containerHeight)+ulScrollTop)+parseInt(opts.ddMaxHeight);
                                } else {
                                        $input.liOffsetTop = ((liOffsetTop-containerOffsetTop)-containerHeight)+ulScrollTop;
                                }

                                //scroll list to focus on current item
                                $newUl.scrollTop($input.liOffsetTop);

                                $newLi.removeClass('hiLite')
                                        .eq(currentIndex)
                                        .addClass('hiLite');
                                var text = $newLi.eq(currentIndex).text();
                                //page load
                                if (init == true){
                                        $input.val(text);
                                        $containerDivText.text(text);
                                        return false;
                                }
                                $input.val(text).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);
                                        navigateList(currentIndex, true);
                                }
                        );

                        //handle up and down keys
                        function keyPress(element) {
                                //when keys are pressed
                                element.onkeydown = function(e){
                                        if (e == null) { //ie
                                                var keycode = event.keyCode;
                                        } else { //everything else
                                                var 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);
                        });

                        //hide list on blur
                        $containerDiv.blur(function(){
                           $(this).removeClass('newListSelFocus');
                           //$newUl.hide();
                           $newUl.slideUp('300');
                           //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);