/**
* Stylish Select 0.4.5 - jQuery plugin to replace a select drop down box with a stylable unordered list
* http://github.com/sko77sun/Stylish-Select
* 
* Requires: jQuery 1.3 or newer
* 
* Contributions from Justin Beasley: http://www.harvest.org/ Anatoly Ressin: http://www.artazor.lv/ Wilfred Hughes: https://github.com/Wilfred
* 
* Dual licensed under the MIT and GPL licenses.
*/
(function($)
{
    //add class to html tag
    $('html').addClass('stylish-select');

    //Cross-browser implementation of indexOf from MDN: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
    if (!Array.prototype.indexOf)
    {
        Array.prototype.indexOf = function(searchElement /*, fromIndex */)
        {
            if (this === void 0 || this === null)
                throw new TypeError();

            var t = Object(this);
            var len = t.length >>> 0;
            if (len === 0)
                return -1;

            var n = 0;
            if (arguments.length > 0)
            {
                n = Number(arguments[1]);
                if (n !== n) // shortcut for verifying if it's NaN
                    n = 0;
                else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0))
                    n = (n > 0 || -1) * Math.floor(Math.abs(n));
            }

            if (n >= len)
                return -1;

            var k = n >= 0
            ? n
            : Math.max(len - Math.abs(n), 0);

            for (; k < len; k++)
            {
                if (k in t && t[k] === searchElement)
                    return k;
            }
            return -1;
        };
    }

    //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').sSelect(oldOpts);
        }
    });

    $.fn.sSelect = function(options)
    {
        return this.each(function()
        {
            var defaults = {                                
                animationSpeed: 0, //set speed of dropdown
                ddMaxHeight:    '', //set css max-height value of dropdown
                containerClass: '', //additional classes for container div
                containerText: ''
            };

            //initial variables
            var opts = $.extend(defaults, options),
            $input = $(this),
            $containerDivText    = $('<div class="selectedTxt"></div>'),
            $containerDiv        = $('<div class="newListSelected ' + opts.containerClass + '"></div>'),
            $containerDivWrapper = $('<div class="SSContainerDivWrapper" style="visibility:hidden;"></div>'),
            $newUl               = $('<ul class="newList"></ul>'),
            itemIndex            = -1,
            currentIndex         = -1,
            prevIndex            = -1,
            keys                 = [],
            prevKey              = false,
            prevented            = false,
            $newLi;
            
            if(opts.containerText != '')
                $containerDivText.html(opts.containerText);

            //added by Justin Beasley
            $(this).data('ssOpts',options);

            //build new list
            $containerDiv.insertAfter($input);
            $containerDiv.attr("tabindex", $input.attr("tabindex") || "0");
            $containerDivText.prependTo($containerDiv);
            $newUl.appendTo($containerDiv);
            $newUl.wrap($containerDivWrapper);
            $containerDivWrapper = $newUl.parent();
            $input.hide();

            //added by Justin Beasley (used for lists initialized while hidden)
            $containerDivText.data('ssReRender',!$containerDivText.is(':visible'));

            //test for optgroup
            if ($input.children('optgroup').length == 0)
            {
                $input.children().each(function(i)
                {
                    var option = $(this).html();
                    var key = $(this).val();

                    //add first letter of each word to array
                    keys.push(option.charAt(0).toLowerCase());
                    if ($(this).attr('selected') == 'selected')
                    {
                        opts.defaultText = option;
                        currentIndex = prevIndex = i;
                    }                                     
                    
                    if(!$(this).attr('disabled'))
                        $newUl.append($('<li><a href="JavaScript:void(0);">'+option+'</a></li>').data('key', key));
                    else
                        $newUl.append($('<li style="display:none;"><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>'),
                    $optGroupList = $('<ul></ul>');

                    $optGroup.appendTo($newUl);
                    $optGroupList.appendTo($optGroup);

                    $(this).children().each(function()
                    {
                        ++itemIndex;
                        var option = $(this).html();
                        var key = $(this).val();
                        //add first letter of each word to array
                        keys.push(option.charAt(0).toLowerCase());
                        if ($(this).attr('selected') == 'selected')
                        {
                            opts.defaultText = option;
                            currentIndex = prevIndex = 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);
            }
            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         = $(window).height(),
                scrollTop         = $(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(
                    {
                        height: newUlHeight
                    });
                    $containerDivWrapper.css({
                        top:    '-'+newUlHeight+'px',
                        height: newUlHeight
                    });
                    $input.onTop = true;
                }
                else
                {
                    $newUl.css(
                    {
                        height: newUlHeight
                    });
                    $containerDivWrapper.css(
                    {
                        top:     containerHeight+'px',
                        height: newUlHeight
                    });
                    $input.onTop = false;
                }
            }

            //run function on page load
            newUlPos();

            //run function on browser window resize
            $(window).bind('resize.sSelect scroll.sSelect', newUlPos);

            //positioning
            function positionFix()
            {
                $containerDiv.css('position','relative');
            }

            function positionHideFix()
            {
                $containerDiv.css(
                {
                    position: 'static'
                });
            }

            $containerDivText.bind('click.sSelect',function(event)
            {
                event.stopPropagation();

                //added by Justin Beasley
                if($(this).data('ssReRender'))
                {
                    newUlHeight = $newUl.height('').height();
                    $containerDivWrapper.height('');
                    containerHeight = $containerDiv.height();
                    $(this).data('ssReRender',false);
                    newUlPos();
                }
                
                //hide all menus apart from this one
                $('.SSContainerDivWrapper')
                .not($(this).next())
                .hide()
                .parent()
                .css('position', 'static')
                .removeClass('newListSelFocus');
                    
                //show/hide this menu
                $containerDivWrapper.toggle();
                positionFix();
                
                //scroll list to selected item
                if(currentIndex == -1) currentIndex = 0;
                $newLi.eq(currentIndex).focus();
            });

            function closeDropDown(fireChange, resetText)
            {
                if(fireChange == true)
                {
                    prevIndex = currentIndex;
                    $input.change();
                }
                
                if(resetText == true)
                {
                    currentIndex = prevIndex;
                    navigateList(currentIndex);
                }
                
                $containerDivWrapper.hide();
                positionHideFix();
            }

            $newLi.bind('click.sSelect',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, true);
                closeDropDown();
            });

            $newLi.bind('mouseenter.sSelect',
                function(e)
                {
                    var $hoveredLi = $(e.target);
                    $hoveredLi.addClass('newListHover');
                }
                ).bind('mouseleave.sSelect',
                function(e)
                {
                    var $hoveredLi = $(e.target);
                    $hoveredLi.removeClass('newListHover');
                }
                );

            function navigateList(currentIndex, fireChange)
            {
                if(currentIndex == -1)
                {
                    $containerDivText.text(opts.defaultText);
                    $newLi.removeClass('hiLite');
                }
                else
                {
                    $newLi.removeClass('hiLite')
                    .eq(currentIndex)
                    .addClass('hiLite');

                    var text = $newLi.eq(currentIndex).text(),
                    val = $newLi.eq(currentIndex).parent().data('key');

                    try
                    {
                        $input.val(val)
                    }
                    catch(ex)
                    {
                        // handle ie6 exception
                        $input[0].selectedIndex = currentIndex;
                    }

                    $containerDivText.text(text);
                
                    //only fire change event if specified
                    if(fireChange == true)
                    {
                        prevIndex = currentIndex;
                        $input.change();
                    }
                
                    if ($containerDivWrapper.is(':visible'))
                    {
                        $newLi.eq(currentIndex).focus();
                    }
                }
            }

            $input.bind('change.sSelect',function(event)
            {
                var $targetInput = $(event.target);
                //stop change function from firing
                if (prevented == true)
                {
                    prevented = false;
                    return false;
                }
                var $currentOpt  = $targetInput.find(':selected');
                currentIndex = $targetInput.find('option').index($currentOpt);
                navigateList(currentIndex);
            });

            //handle up and down keys
            function keyPress(element)
            {
                //when keys are pressed
                $(element).unbind('keydown.sSelect').bind('keydown.sSelect',function(e)
                {
                    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: //enter
                        case 27: //esc
                            closeDropDown(true);
                            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)
                        {
                            // if no entry was found or new key pressed search from start of array
                            currentIndex = keys.indexOf(keyPressed);
                        }

                        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.bind('click.sSelect',function(e)
            {
                e.stopPropagation();
                keyPress(this);
            });

            $containerDiv.bind('focus.sSelect',function()
            {
                $(this).addClass('newListSelFocus');
                keyPress(this);
            });

            $containerDiv.bind('blur.sSelect',function()
            {
                $(this).removeClass('newListSelFocus');
            });

            //hide list on blur
            $(document).bind('click.sSelect',function()
            {
                $containerDiv.removeClass('newListSelFocus');
                
                if ($containerDivWrapper.is(':visible'))
                {
                    closeDropDown(false, true);
                }
                else
                {
                    closeDropDown(false);
                }
            });

            //add classes on hover
            $containerDivText.bind('mouseenter.sSelect',
                function(e)
                {
                    var $hoveredTxt = $(e.target);
                    $hoveredTxt.parent().addClass('newListSelHover');
                }
                ).bind('mouseleave.sSelect',
                function(e)
                {
                    var $hoveredTxt = $(e.target);
                    $hoveredTxt.parent().removeClass('newListSelHover');
                }
                );

            //reset left property and hide
            $containerDivWrapper.css(
            {
                left: '0',
                display: 'none',
                visibility: 'visible'
            });

        });

    };

})(jQuery);