SGJP / Kuznia

/*
 * jQuery UI selectmenu 1.3.0pre version
 *
 * Copyright (c) 2009-2010 filament group, http://filamentgroup.com
 * Copyright (c) 2010-2012 Felix Nagel, http://www.felixnagel.com
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 * https://github.com/fnagel/jquery-ui/wiki/Selectmenu
 */

(function ($) {

    $.widget("ui.selectmenu", {
        options: {
            appendTo: "body",
            typeAhead: 1000,
            style: 'dropdown',
            positionOptions: {
                my: "left top",
                at: "left bottom",
                offset: null
            },
            width: null,
            menuWidth: null,
            handleWidth: 26,
            maxHeight: null,
            icons: null,
            format: null,
            escapeHtml: false,
            bgImage: function () {
            }
        },

        _create: function () {
            var self = this, o = this.options;

            // set a default id value, generate a new random one if not set by developer
            var selectmenuId = (this.element.attr('id') || 'ui-selectmenu-' + Math.random().toString(16).slice(2, 10)).replace(/(:|\.)/g, '')

            // quick array of button and menu id's
            this.ids = [ selectmenuId, selectmenuId + '-button', selectmenuId + '-menu' ];

            // define safe mouseup for future toggling
            this._safemouseup = true;
            this.isOpen = false;

            // create menu button wrapper
            this.newelement = $('<a />', {
                'class': this.widgetBaseClass + ' ui-widget ui-state-default ui-corner-all',
                'id': this.ids[ 1 ],
                'role': 'button',
                'href': '#nogo',
                'tabindex': this.element.attr('disabled') ? 1 : 0,
                'aria-haspopup': true,
                'aria-owns': this.ids[ 2 ]
            });
            this.newelementWrap = $("<span />")
                .append(this.newelement)
                .insertAfter(this.element);

            // transfer tabindex
            var tabindex = this.element.attr('tabindex');
            if (tabindex) {
                this.newelement.attr('tabindex', tabindex);
            }

            // save reference to select in data for ease in calling methods
            this.newelement.data('selectelement', this.element);

            // menu icon
            this.selectmenuIcon = $('<span class="' + this.widgetBaseClass + '-icon ui-icon"></span>')
                .prependTo(this.newelement);

            // append status span to button
            this.newelement.prepend('<span class="' + self.widgetBaseClass + '-status" />');

            // make associated form label trigger focus
            this.element.bind({
                'click.selectmenu': function (event) {
                    self.newelement.focus();
                    event.preventDefault();
                }
            });

            // click toggle for menu visibility
            this.newelement
                .bind('mousedown.selectmenu', function (event) {
                    self._toggle(event, true);
                    // make sure a click won't open/close instantly
                    if (o.style == "popup") {
                        self._safemouseup = false;
                        setTimeout(function () {
                            self._safemouseup = true;
                        }, 300);
                    }
                    return false;
                })
                .bind('click.selectmenu', function () {
                    return false;
                })
                .bind("keydown.selectmenu", function (event) {
                    var ret = false;
                    switch (event.keyCode) {
                        case $.ui.keyCode.ENTER:
                            ret = true;
                            break;
                        case $.ui.keyCode.SPACE:
                            self._toggle(event);
                            break;
                        case $.ui.keyCode.UP:
                            if (event.altKey) {
                                self.open(event);
                            } else {
                                self._moveSelection(-1);
                            }
                            break;
                        case $.ui.keyCode.DOWN:
                            if (event.altKey) {
                                self.open(event);
                            } else {
                                self._moveSelection(1);
                            }
                            break;
                        case $.ui.keyCode.LEFT:
                            self._moveSelection(-1);
                            break;
                        case $.ui.keyCode.RIGHT:
                            self._moveSelection(1);
                            break;
                        case $.ui.keyCode.TAB:
                            ret = true;
                            break;
                        case $.ui.keyCode.PAGE_UP:
                        case $.ui.keyCode.HOME:
                            self.index(0);
                            break;
                        case $.ui.keyCode.PAGE_DOWN:
                        case $.ui.keyCode.END:
                            self.index(self._optionLis.length);
                            break;
                        default:
                            ret = true;
                    }
                    return ret;
                })
                .bind('keypress.selectmenu', function (event) {
                    if (event.which > 0) {
                        self._typeAhead(event.which, 'mouseup');
                    }
                    return true;
                })
                .bind('mouseover.selectmenu', function () {
                    if (!o.disabled) $(this).addClass('ui-state-hover');
                })
                .bind('mouseout.selectmenu', function () {
                    if (!o.disabled) $(this).removeClass('ui-state-hover');
                })
                .bind('focus.selectmenu', function () {
                    if (!o.disabled) $(this).addClass('ui-state-focus');
                })
                .bind('blur.selectmenu', function () {
                    if (!o.disabled) $(this).removeClass('ui-state-focus');
                });

            // document click closes menu
            $(document).bind("mousedown.selectmenu-" + this.ids[0], function (event) {
                if (self.isOpen) {
                    self.close(event);
                }
            });

            // change event on original selectmenu
            this.element
                .bind("click.selectmenu", function () {
                    self._refreshValue();
                })
                // FIXME: newelement can be null under unclear circumstances in IE8
                // TODO not sure if this is still a problem (fnagel 20.03.11)
                .bind("focus.selectmenu", function () {
                    if (self.newelement) {
                        self.newelement[0].focus();
                    }
                });

            // set width when not set via options
            if (!o.width) {
                o.width = this.element.outerWidth();
            }
            // set menu button width
            this.newelement.width(o.width);

            // hide original selectmenu element
            this.element.hide();

            // create menu portion, append to body
            this.list = $('<ul />', {
                'class': 'ui-widget ui-widget-content',
                'aria-hidden': true,
                'role': 'listbox',
                'aria-labelledby': this.ids[1],
                'id': this.ids[2]
            });
            this.listWrap = $("<div />", {
                'class': self.widgetBaseClass + '-menu'
            }).append(this.list).appendTo(o.appendTo);

            // transfer menu click to menu button
            this.list
                .bind("keydown.selectmenu", function (event) {
                    var ret = false;
                    switch (event.keyCode) {
                        case $.ui.keyCode.UP:
                            if (event.altKey) {
                                self.close(event, true);
                            } else {
                                self._moveFocus(-1);
                            }
                            break;
                        case $.ui.keyCode.DOWN:
                            if (event.altKey) {
                                self.close(event, true);
                            } else {
                                self._moveFocus(1);
                            }
                            break;
                        case $.ui.keyCode.LEFT:
                            self._moveFocus(-1);
                            break;
                        case $.ui.keyCode.RIGHT:
                            self._moveFocus(1);
                            break;
                        case $.ui.keyCode.HOME:
                            self._moveFocus(':first');
                            break;
                        case $.ui.keyCode.PAGE_UP:
                            self._scrollPage('up');
                            break;
                        case $.ui.keyCode.PAGE_DOWN:
                            self._scrollPage('down');
                            break;
                        case $.ui.keyCode.END:
                            self._moveFocus(':last');
                            break;
                        case $.ui.keyCode.ENTER:
                        case $.ui.keyCode.SPACE:
                            self.close(event, true);
                            $(event.target).parents('li:eq(0)').trigger('mouseup');
                            break;
                        case $.ui.keyCode.TAB:
                            ret = true;
                            self.close(event, true);
                            $(event.target).parents('li:eq(0)').trigger('mouseup');
                            break;
                        case $.ui.keyCode.ESCAPE:
                            self.close(event, true);
                            break;
                        default:
                            ret = true;
                    }
                    return ret;
                })
                .bind('keypress.selectmenu', function (event) {
                    if (event.which > 0) {
                        self._typeAhead(event.which, 'focus');
                    }
                    return true;
                })
                // this allows for using the scrollbar in an overflowed list
                .bind('mousedown.selectmenu mouseup.selectmenu', function () {
                    return false;
                });

            // needed when window is resized
            $(window).bind("resize.selectmenu-" + this.ids[0], $.proxy(self.close, this));
        },

        _init: function () {
            var self = this, o = this.options;

            // serialize selectmenu element options
            var selectOptionData = [];
            this.element.find('option').each(function () {
                var opt = $(this);
                selectOptionData.push({
                    value: opt.attr('value'),
                    text: self._formatText(opt.text()),
                    selected: opt.attr('selected'),
                    disabled: opt.attr('disabled'),
                    classes: opt.attr('class'),
                    typeahead: opt.attr('typeahead'),
                    parentOptGroup: opt.parent('optgroup'),
                    bgImage: o.bgImage.call(opt)
                });
            });

            // active state class is only used in popup style
            var activeClass = (self.options.style == "popup") ? " ui-state-active" : "";

            // empty list so we can refresh the selectmenu via selectmenu()
            this.list.html("");

            // write li's
            if (selectOptionData.length) {
                for (var i = 0; i < selectOptionData.length; i++) {
                    var thisLiAttr = { role: 'presentation' };
                    if (selectOptionData[ i ].disabled) {
                        thisLiAttr[ 'class' ] = this.namespace + '-state-disabled';
                    }
                    var thisAAttr = {
                        html: selectOptionData[i].text || '&nbsp;',
                        href: '#nogo',
                        tabindex: -1,
                        role: 'option',
                        'aria-selected': false
                    };
                    if (selectOptionData[ i ].disabled) {
                        thisAAttr[ 'aria-disabled' ] = selectOptionData[ i ].disabled;
                    }
                    if (selectOptionData[ i ].typeahead) {
                        thisAAttr[ 'typeahead' ] = selectOptionData[ i ].typeahead;
                    }
                    var thisA = $('<a/>', thisAAttr);
                    var thisLi = $('<li/>', thisLiAttr)
                        .append(thisA)
                        .data('index', i)
                        .addClass(selectOptionData[i].classes)
                        .data('optionClasses', selectOptionData[i].classes || '')
                        .bind("mouseup.selectmenu", function (event) {
                            if (self._safemouseup && !self._disabled(event.currentTarget) && !self._disabled($(event.currentTarget).parents("ul>li." + self.widgetBaseClass + "-group "))) {
                                var changed = $(this).data('index') != self._selectedIndex();
                                self.index($(this).data('index'));
                                self.select(event);
                                if (changed) {
                                    self.change(event);
                                }
                                self.close(event, true);
                            }
                            return false;
                        })
                        .bind("click.selectmenu", function () {
                            return false;
                        })
                        .bind('mouseover.selectmenu focus.selectmenu', function (e) {
                            // no hover if diabled
                            if (!$(e.currentTarget).hasClass(self.namespace + '-state-disabled') && !$(e.currentTarget).parent("ul").parent("li").hasClass(self.namespace + '-state-disabled')) {
                                self._selectedOptionLi().addClass(activeClass);
                                self._focusedOptionLi().removeClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                                $(this).removeClass('ui-state-active').addClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                            }
                        })
                        .bind('mouseout.selectmenu blur.selectmenu', function () {
                            if ($(this).is(self._selectedOptionLi().selector)) {
                                $(this).addClass(activeClass);
                            }
                            $(this).removeClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                        });

                    // optgroup or not...
                    if (selectOptionData[i].parentOptGroup.length) {
                        var optGroupName = self.widgetBaseClass + '-group-' + this.element.find('optgroup').index(selectOptionData[i].parentOptGroup);
                        if (this.list.find('li.' + optGroupName).length) {
                            this.list.find('li.' + optGroupName + ':last ul').append(thisLi);
                        } else {
                            $(' <li role="presentation" class="' + self.widgetBaseClass + '-group ' + optGroupName + (selectOptionData[i].parentOptGroup.attr("disabled") ? ' ' + this.namespace + '-state-disabled" aria-disabled="true"' : '"' ) + '><span class="' + self.widgetBaseClass + '-group-label">' + selectOptionData[i].parentOptGroup.attr('label') + '</span><ul></ul></li> ')
                                .appendTo(this.list)
                                .find('ul')
                                .append(thisLi);
                        }
                    } else {
                        thisLi.appendTo(this.list);
                    }

                    // append icon if option is specified
                    if (o.icons) {
                        for (var j in o.icons) {
                            if (thisLi.is(o.icons[j].find)) {
                                thisLi
                                    .data('optionClasses', selectOptionData[i].classes + ' ' + self.widgetBaseClass + '-hasIcon')
                                    .addClass(self.widgetBaseClass + '-hasIcon');
                                var iconClass = o.icons[j].icon || "";
                                thisLi
                                    .find('a:eq(0)')
                                    .prepend('<span class="' + self.widgetBaseClass + '-item-icon ui-icon ' + iconClass + '"></span>');
                                if (selectOptionData[i].bgImage) {
                                    thisLi.find('span').css('background-image', selectOptionData[i].bgImage);
                                }
                            }
                        }
                    }
                }
            } else {
                $('<li role="presentation"><a href="#nogo" tabindex="-1" role="option"></a></li>').appendTo(this.list);
            }
            // we need to set and unset the CSS classes for dropdown and popup style
            var isDropDown = ( o.style == 'dropdown' );
            this.newelement
                .toggleClass(self.widgetBaseClass + '-dropdown', isDropDown)
                .toggleClass(self.widgetBaseClass + '-popup', !isDropDown);
            this.list
                .toggleClass(self.widgetBaseClass + '-menu-dropdown ui-corner-bottom', isDropDown)
                .toggleClass(self.widgetBaseClass + '-menu-popup ui-corner-all', !isDropDown)
                // add corners to top and bottom menu items
                .find('li:first')
                .toggleClass('ui-corner-top', !isDropDown)
                .end().find('li:last')
                .addClass('ui-corner-bottom');
            this.selectmenuIcon
                .toggleClass('ui-icon-triangle-1-s', isDropDown)
                .toggleClass('ui-icon-triangle-2-n-s', !isDropDown);

            // set menu width to either menuWidth option value, width option value, or select width
            if (o.style == 'dropdown') {
                this.list.width(o.menuWidth ? o.menuWidth : o.width);
            } else {
                this.list.width(o.menuWidth ? o.menuWidth : o.width - o.handleWidth);
            }

            // reset height to auto
            this.list.css('height', 'auto');
            var listH = this.listWrap.height();
            var winH = $(window).height();
            // calculate default max height
            var maxH = o.maxHeight ? Math.min(o.maxHeight, winH) : winH / 3;
            if (listH > maxH) this.list.height(maxH);

            // save reference to actionable li's (not group label li's)
            this._optionLis = this.list.find('li:not(.' + self.widgetBaseClass + '-group)');

            // transfer disabled state
            if (this.element.attr('disabled')) {
                this.disable();
            } else {
                this.enable();
            }

            // update value
            this.index(this._selectedIndex());

            // set selected item so movefocus has intial state
            this._selectedOptionLi().addClass(this.widgetBaseClass + '-item-focus');

            // needed when selectmenu is placed at the very bottom / top of the page
            clearTimeout(this.refreshTimeout);
            this.refreshTimeout = window.setTimeout(function () {
                self._refreshPosition();
            }, 200);
        },

        destroy: function () {
            this.element.removeData(this.widgetName)
                .removeClass(this.widgetBaseClass + '-disabled' + ' ' + this.namespace + '-state-disabled')
                .removeAttr('aria-disabled')
                .unbind(".selectmenu");

            $(window).unbind(".selectmenu-" + this.ids[0]);
            $(document).unbind(".selectmenu-" + this.ids[0]);

            this.newelementWrap.remove();
            this.listWrap.remove();

            // unbind click event and show original select
            this.element
                .unbind(".selectmenu")
                .show();

            // call widget destroy function
            $.Widget.prototype.destroy.apply(this, arguments);
        },

        _typeAhead: function (code, eventType) {
            var self = this,
                c = String.fromCharCode(code).toLowerCase(),
                matchee = null,
                nextIndex = null;

            // Clear any previous timer if present
            if (self._typeAhead_timer) {
                window.clearTimeout(self._typeAhead_timer);
                self._typeAhead_timer = undefined;
            }

            // Store the character typed
            self._typeAhead_chars = (self._typeAhead_chars === undefined ? "" : self._typeAhead_chars).concat(c);

            // Detect if we are in cyciling mode or direct selection mode
            if (self._typeAhead_chars.length < 2 ||
                (self._typeAhead_chars.substr(-2, 1) === c && self._typeAhead_cycling)) {
                self._typeAhead_cycling = true;

                // Match only the first character and loop
                matchee = c;
            }
            else {
                // We won't be cycling anymore until the timer expires
                self._typeAhead_cycling = false;

                // Match all the characters typed
                matchee = self._typeAhead_chars;
            }

            // We need to determine the currently active index, but it depends on
            // the used context: if it's in the element, we want the actual
            // selected index, if it's in the menu, just the focused one
            // I copied this code from _moveSelection() and _moveFocus()
            // respectively --thg2k
            var selectedIndex = (eventType !== 'focus' ?
                this._selectedOptionLi().data('index') :
                this._focusedOptionLi().data('index')) || 0;

            for (var i = 0; i < this._optionLis.length; i++) {
                var thisText = this._optionLis.eq(i).text().substr(0, matchee.length).toLowerCase();

                if (thisText === matchee) {
                    if (self._typeAhead_cycling) {
                        if (nextIndex === null)
                            nextIndex = i;

                        if (i > selectedIndex) {
                            nextIndex = i;
                            break;
                        }
                    } else {
                        nextIndex = i;
                    }
                }
            }

            if (nextIndex !== null) {
                // Why using trigger() instead of a direct method to select the
                // index? Because we don't what is the exact action to do, it
                // depends if the user is typing on the element or on the popped
                // up menu
                this._optionLis.eq(nextIndex).find("a").trigger(eventType);
            }

            self._typeAhead_timer = window.setTimeout(function () {
                self._typeAhead_timer = undefined;
                self._typeAhead_chars = undefined;
                self._typeAhead_cycling = undefined;
            }, self.options.typeAhead);
        },

        // returns some usefull information, called by callbacks only
        _uiHash: function () {
            var index = this.index();
            return {
                index: index,
                option: $("option", this.element).get(index),
                value: this.element[0].value
            };
        },

        open: function (event) {
            var self = this, o = this.options;
            if (self.newelement.attr("aria-disabled") != 'true') {
                self._closeOthers(event);
                self.newelement.addClass('ui-state-active');

                self.list.attr('aria-hidden', false);
                self.listWrap.addClass(self.widgetBaseClass + '-open');

                var selected = this._selectedOptionLi();
                if (o.style == "dropdown") {
                    self.newelement.removeClass('ui-corner-all').addClass('ui-corner-top');
                } else {
                    // center overflow and avoid flickering
                    this.list
                        .css("left", -5000)
                        .scrollTop(this.list.scrollTop() + selected.position().top - this.list.outerHeight() / 2 + selected.outerHeight() / 2)
                        .css("left", "auto");
                }

                self._refreshPosition();

                var link = selected.find("a");
                if (link.length) link[0].focus();

                self.isOpen = true;
                self._trigger("open", event, self._uiHash());
            }
        },

        close: function (event, retainFocus) {
            if (this.newelement.is('.ui-state-active')) {
                this.newelement
                    .removeClass('ui-state-active');
                this.listWrap.removeClass(this.widgetBaseClass + '-open');
                this.list.attr('aria-hidden', true);
                if (this.options.style == "dropdown") {
                    this.newelement.removeClass('ui-corner-top').addClass('ui-corner-all');
                }
                if (retainFocus) {
                    this.newelement.focus();
                }
                this.isOpen = false;
                this._trigger("close", event, this._uiHash());
            }
        },

        change: function (event) {
            this.element.trigger("change");
            this._trigger("change", event, this._uiHash());
        },

        select: function (event) {
            if (this._disabled(event.currentTarget)) {
                return false;
            }
            this._trigger("select", event, this._uiHash());
        },

        widget: function () {
            return this.listWrap.add(this.newelementWrap);
        },

        _closeOthers: function (event) {
            $('.' + this.widgetBaseClass + '.ui-state-active').not(this.newelement).each(function () {
                $(this).data('selectelement').selectmenu('close', event);
            });
            $('.' + this.widgetBaseClass + '.ui-state-hover').trigger('mouseout');
        },

        _toggle: function (event, retainFocus) {
            if (this.isOpen) {
                this.close(event, retainFocus);
            } else {
                this.open(event);
            }
        },

        _formatText: function (text) {
            if (this.options.format) {
                text = this.options.format(text);
            } else if (this.options.escapeHtml) {
                text = $('<div />').text(text).html();
            }
            return text;
        },

        _selectedIndex: function () {
            return this.element[0].selectedIndex;
        },

        _selectedOptionLi: function () {
            return this._optionLis.eq(this._selectedIndex());
        },

        _focusedOptionLi: function () {
            return this.list.find('.' + this.widgetBaseClass + '-item-focus');
        },

        _moveSelection: function (amt, recIndex) {
            // do nothing if disabled
            if (!this.options.disabled) {
                var currIndex = parseInt(this._selectedOptionLi().data('index') || 0, 10);
                var newIndex = currIndex + amt;
                // do not loop when using up key

                if (newIndex < 0) {
                    newIndex = 0;
                }
                if (newIndex > this._optionLis.size() - 1) {
                    newIndex = this._optionLis.size() - 1;
                }
                // Occurs when a full loop has been made
                if (newIndex === recIndex) {
                    return false;
                }

                if (this._optionLis.eq(newIndex).hasClass(this.namespace + '-state-disabled')) {
                    // if option at newIndex is disabled, call _moveFocus, incrementing amt by one
                    (amt > 0) ? ++amt : --amt;
                    this._moveSelection(amt, newIndex);
                } else {
                    this._optionLis.eq(newIndex).trigger('mouseover').trigger('mouseup');
                }
            }
        },

        _moveFocus: function (amt, recIndex) {
            if (!isNaN(amt)) {
                var currIndex = parseInt(this._focusedOptionLi().data('index') || 0, 10);
                var newIndex = currIndex + amt;
            } else {
                var newIndex = parseInt(this._optionLis.filter(amt).data('index'), 10);
            }

            if (newIndex < 0) {
                newIndex = 0;
            }
            if (newIndex > this._optionLis.size() - 1) {
                newIndex = this._optionLis.size() - 1;
            }

            //Occurs when a full loop has been made
            if (newIndex === recIndex) {
                return false;
            }

            var activeID = this.widgetBaseClass + '-item-' + Math.round(Math.random() * 1000);

            this._focusedOptionLi().find('a:eq(0)').attr('id', '');

            if (this._optionLis.eq(newIndex).hasClass(this.namespace + '-state-disabled')) {
                // if option at newIndex is disabled, call _moveFocus, incrementing amt by one
                (amt > 0) ? ++amt : --amt;
                this._moveFocus(amt, newIndex);
            } else {
                this._optionLis.eq(newIndex).find('a:eq(0)').attr('id', activeID).focus();
            }

            this.list.attr('aria-activedescendant', activeID);
        },

        _scrollPage: function (direction) {
            var numPerPage = Math.floor(this.list.outerHeight() / this._optionLis.first().outerHeight());
            numPerPage = (direction == 'up' ? -numPerPage : numPerPage);
            this._moveFocus(numPerPage);
        },

        _setOption: function (key, value) {
            this.options[key] = value;
            // set
            if (key == 'disabled') {
                if (value) this.close();
                this.element
                    .add(this.newelement)
                    .add(this.list)[value ? 'addClass' : 'removeClass'](
                        this.widgetBaseClass + '-disabled' + ' ' +
                            this.namespace + '-state-disabled')
                    .attr("aria-disabled", value);
            }
        },

        disable: function (index, type) {
            // if options is not provided, call the parents disable function
            if (typeof( index ) == 'undefined') {
                this._setOption('disabled', true);
            } else {
                if (type == "optgroup") {
                    this._disableOptgroup(index);
                } else {
                    this._disableOption(index);
                }
            }
        },

        enable: function (index, type) {
            // if options is not provided, call the parents enable function
            if (typeof( index ) == 'undefined') {
                this._setOption('disabled', false);
            } else {
                if (type == "optgroup") {
                    this._enableOptgroup(index);
                } else {
                    this._enableOption(index);
                }
            }
        },

        _disabled: function (elem) {
            return $(elem).hasClass(this.namespace + '-state-disabled');
        },


        _disableOption: function (index) {
            var optionElem = this._optionLis.eq(index);
            if (optionElem) {
                optionElem.addClass(this.namespace + '-state-disabled')
                    .find("a").attr("aria-disabled", true);
                this.element.find("option").eq(index).attr("disabled", "disabled");
            }
        },

        _enableOption: function (index) {
            var optionElem = this._optionLis.eq(index);
            if (optionElem) {
                optionElem.removeClass(this.namespace + '-state-disabled')
                    .find("a").attr("aria-disabled", false);
                this.element.find("option").eq(index).removeAttr("disabled");
            }
        },

        _disableOptgroup: function (index) {
            var optGroupElem = this.list.find('li.' + this.widgetBaseClass + '-group-' + index);
            if (optGroupElem) {
                optGroupElem.addClass(this.namespace + '-state-disabled')
                    .attr("aria-disabled", true);
                this.element.find("optgroup").eq(index).attr("disabled", "disabled");
            }
        },

        _enableOptgroup: function (index) {
            var optGroupElem = this.list.find('li.' + this.widgetBaseClass + '-group-' + index);
            if (optGroupElem) {
                optGroupElem.removeClass(this.namespace + '-state-disabled')
                    .attr("aria-disabled", false);
                this.element.find("optgroup").eq(index).removeAttr("disabled");
            }
        },

        index: function (newValue) {
            if (arguments.length) {
                if (!this._disabled($(this._optionLis[newValue]))) {
                    this.element[0].selectedIndex = newValue;
                    this._refreshValue();
                } else {
                    return false;
                }
            } else {
                return this._selectedIndex();
            }
        },

        value: function (newValue) {
            if (arguments.length) {
                this.element[0].value = newValue;
                this._refreshValue();
            } else {
                return this.element[0].value;
            }
        },

        _refreshValue: function () {
            var activeClass = (this.options.style == "popup") ? " ui-state-active" : "";
            var activeID = this.widgetBaseClass + '-item-' + Math.round(Math.random() * 1000);
            // deselect previous
            this.list
                .find('.' + this.widgetBaseClass + '-item-selected')
                .removeClass(this.widgetBaseClass + "-item-selected" + activeClass)
                .find('a')
                .attr('aria-selected', 'false')
                .attr('id', '');
            // select new
            this._selectedOptionLi()
                .addClass(this.widgetBaseClass + "-item-selected" + activeClass)
                .find('a')
                .attr('aria-selected', 'true')
                .attr('id', activeID);

            // toggle any class brought in from option
            var currentOptionClasses = (this.newelement.data('optionClasses') ? this.newelement.data('optionClasses') : "");
            var newOptionClasses = (this._selectedOptionLi().data('optionClasses') ? this._selectedOptionLi().data('optionClasses') : "");
            this.newelement
                .removeClass(currentOptionClasses)
                .data('optionClasses', newOptionClasses)
                .addClass(newOptionClasses)
                .find('.' + this.widgetBaseClass + '-status')
                .html(
                    this._selectedOptionLi()
                        .find('a:eq(0)')
                        .html()
                );

            this.list.attr('aria-activedescendant', activeID);
        },

        _refreshPosition: function () {
            var o = this.options;

            // if its a pop-up we need to calculate the position of the selected li
            if (o.style == "popup" && !o.positionOptions.offset) {
                var selected = this._selectedOptionLi();
                var _offset = "0 " + ( this.list.offset().top - selected.offset().top - ( this.newelement.outerHeight() + selected.outerHeight() ) / 2);
            }
            this.listWrap
                .removeAttr('style')
                .zIndex(this.element.zIndex() + 1)
                .position({
                    // set options for position plugin
                    of: o.positionOptions.of || this.newelement,
                    my: o.positionOptions.my,
                    at: o.positionOptions.at,
                    offset: o.positionOptions.offset || _offset,
                    collision: o.positionOptions.collision || o.style == "popup" ? 'fit' : 'flip'
                });
        }
    });

})(jQuery);