/*
Stylish Select 0.4.1 - $ 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/

Dual licensed under the MIT and GPL licenses.

*********MODIFIED By Raphael Castaneda: ********************
REPLACED: "$" with "$j"
Introduced: support for disabled options
Fixed: selFocus class wasn't being removed when selection was made

**************************************************************

*/
(function ($j) {
    //add class to html tag
    $j('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
    $j.fn.extend({
        getSetSSValue: function (value) {
            if (value) {
                //set value and trigger change event
                $j(this).val(value).change();
                return this;
            } else {
                return $j(this).find(':selected').val();
            }
        },
        //added by Justin Beasley
        resetSS: function () {
            var oldOpts = $j(this).data('ssOpts');
            $this = $j(this);
            $this.next().remove();
            //unbind all events and redraw
            $this.unbind('.sSelect').sSelect(oldOpts);
        }
    });

    $j.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
                containerClass: '' //additional classes for container div
            };

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

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

            //build new list
            $containerDiv.insertAfter($input);
            $containerDiv.attr("tabindex", $input.attr("tabindex") || "0");
            $containerDivText.prependTo($containerDiv);
            $newUl.appendTo($containerDiv);
            $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 = $j(this).html();
                    var key = $j(this).val();

                    //add first letter of each word to array
                    keys.push(option.charAt(0).toLowerCase());
                    if ($j(this).attr('selected') == true) {
                        opts.defaultText = option;
                        currentIndex = i;
                    }
                    var className = $j(this).attr('class');
                    //test for disabled option
                    if ($j(this).attr('disabled') == true) {
                        $newUl.append($j('<li class="disabledOption"><a href="JavaScript:void(0);" class="' + className + '">' + option + '</a></li>').data('key', key));
                    } else {
                        $newUl.append($j('<li><a href="JavaScript:void(0);" class="' + className + '">' + option + '</a></li>').data('key', key));
                    }

                });
                //cache list items object
                $newLi = $newUl.children().children();

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

                    var optionTitle = $j(this).attr('label'),
                    $optGroup = $j('<li class="newListOptionTitle">' + optionTitle + '</li>');

                    $optGroup.appendTo($newUl);

                    var $optGroupList = $j('<ul></ul>');

                    $optGroupList.appendTo($optGroup);

                    $j(this).children().each(function () {
                        ++itemIndex;
                        var option = $j(this).html();
                        var key = $j(this).val();
                        //add first letter of each word to array
                        keys.push(option.charAt(0).toLowerCase());
                        if ($j(this).attr('selected') == true) {
                            opts.defaultText = option;
                            currentIndex = itemIndex;
                        }
                        $optGroupList.append($j('<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
            $j(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 ($j(this).data('ssReRender')) {
                    newUlHeight = $newUl.height('').height();
                    containerHeight = $containerDiv.height();
                    $j(this).data('ssReRender', false);
                    newUlPos();
                }

                //hide all menus apart from this one
                $j('.newList').not($j(this).next()).hide()
                    .parent()
                        .css('position', 'static')
                        .removeClass('newListSelFocus');

                //show/hide this menu
                $newUl.toggle();
                positionFix();
                //scroll list to selected item
                $newLi.eq(currentIndex).focus();

            });

            $newLi.bind('click.sSelect', function (e) {

                var $clickedLi = $j(e.target);

                //update counter
                currentIndex = $newLi.index($clickedLi);

                //remove all hilites, then add hilite to selected item
                prevented = true;
                navigateList(currentIndex);

                //don't close the list if a disabled option was clicked
                if (!$newLi.eq(currentIndex).parent().hasClass('disabledOption')) {
                    $newUl.hide();
                }
                $containerDiv.css('position', 'static'); //ie
            });

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

            function navigateList(currentIndex, init) {
                if (!($newLi.eq(currentIndex).parent().hasClass('disabledOption') & init != true)) {
                    $newLi.removeClass('hiLite')
                .eq(currentIndex)
                .addClass('hiLite');

                    if ($newUl.is(':visible')) {
                        $newLi.eq(currentIndex).focus();
                    }

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

                    //page load
                    if (init == true) {
                        $input.val(val);
                        $containerDivText.html(text);
                        return false;
                    }

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

                    $input.change();
                    $containerDivText.html(text);
                }
            }

            $input.bind('change.sSelect', function (event) {
                $targetInput = $j(event.target);

               if ($j(this).attr('onchange') != null) {
                    var changeAction = $j(this).attr('name');
                    setTimeout('__doPostBack(\'' + changeAction + '\',\'\')', 0)
                }

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

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

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

            //Added by Raphael -- removes focus cssClass when a selection is made
            $containerDiv.bind('click.sSelect', function () {
                if (!$newLi.eq(currentIndex).parent().hasClass('disabledOption')) {
                    $containerDiv.removeClass('newListSelFocus');
                }
            });

            //hide list on blur
            $j(document).bind('click.sSelect', function () {
                $containerDiv.removeClass('newListSelFocus');
                $newUl.hide();
                positionHideFix();
            });

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

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

        });

    };

})(jQuery);