/*
 * jQuery UI selectmenu version 1.2.0
 *
 * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
 * 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", {
    getter: "value",
    version: "1.9",
    eventPrefix: "selectmenu",
    options: {
        transferClasses: true,
        typeAhead: 1000,
        style: 'dropdown',
        positionOptions: {
            my: "left top",
            at: "left bottom",
            offset: null
        },
        width: null,
        menuWidth: null,
        handleWidth: 26,
        maxHeight: null,
        icons: null,
        iconsFromAttribute: {
            attrib: null,
            icon:   null
        },
        format: null,
        bgImage: function() {},
        wrapperElement: "<div />"
    },

    _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(':', '\\:');

        // 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 = $( o.wrapperElement )
            .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.HOME:
                        self.index(0);
                        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 focus.selectmenu', function() {
                if (!o.disabled) {
                    $(this).addClass(self.widgetBaseClass + '-focus ui-state-hover');
                }
            })
            .bind('mouseout.selectmenu blur.selectmenu', function() {
                if (!o.disabled) {
                    $(this).removeClass(self.widgetBaseClass + '-focus ui-state-hover');
                }
            });

        // 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 = $( o.wrapperElement )
            .addClass( self.widgetBaseClass + '-menu' )
            .append( this.list )
            .appendTo( 'body' );

        // 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),
                    imgPath:    o.iconsFromAttribute.attrib !== null ? opt.attr(o.iconsFromAttribute.attrib) : null
                });
            });

        // 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,
                    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);
                            }
                        }
                    }
                }
                // append icons from option-attrib if option is specified
                if (selectOptionData[i].imgPath) {
                    var attrName  = o.iconsFromAttribute.attrib === null ? "" : o.iconsFromAttribute.attrib,
                        iconClass = o.iconsFromAttribute.icon === null ? "" : o.iconsFromAttribute.icon,
                        imgPath   = selectOptionData[i].imgPath;

//                    console.log(
//                        'attribute: ' + attrName + ' | ' +
//                        'iconClass: ' + iconClass + ' | ' +
//                        'imgPath: '   + imgPath
//                    );

                    if (attrName !== "" && imgPath) {
                        thisLi
                            .data('optionClasses', selectOptionData[i].classes + ' ' + self.widgetBaseClass + '-hasIcon')
                            .addClass(self.widgetBaseClass + '-hasIcon');
                        thisLi
                            .find('a:eq(0)')
                            .prepend(['<span class="', self.widgetBaseClass, '-item-icon ', iconClass, '" ',
                                      'style="background-image: url(\'', imgPath, '\');"', '></span>'].join('')
                             );
                        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 );

        // transfer classes to selectmenu and list
        if ( o.transferClasses ) {
            var transferClasses = this.element.attr( 'class' ) || '';
            this.newelement.add( this.list ).addClass( transferClasses );
        }

        // 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();
        // calculate default max height
        if ( o.maxHeight && o.maxHeight < listH ) {
            this.list.height( o.maxHeight );
        } else {
            var winH = $( window ).height() / 3;
            if ( winH < listH ) this.list.height( winH );
        }

        // 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() );

        // needed when selectmenu is placed at the very bottom / top of the page
        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(),
            items = this.list.find( 'li a' ),
            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 < items.length; i++) {
            var thisText = items.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
            items.eq(nextIndex).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.listWrap.appendTo( o.appendTo );
            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());
    },

    _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) {
        return (this.options.format ? this.options.format(text) : 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 {
                return this._optionLis.eq(newIndex).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.list.find('li: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);
        }
        // update zIndex if jQuery UI is able to process
        this.listWrap
            .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 || 'flip'
            });
    }
});

})(jQuery);