Release note for Id83eda95

[mediawiki.git] / resources / lib / jquery.ui / jquery.ui.tabs.js

/*!
 * jQuery UI Tabs 1.9.2
 * http://jqueryui.com
 *
 * Copyright 2012 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/tabs/
 *
 * Depends:
 *      jquery.ui.core.js
 *      jquery.ui.widget.js
 */
(function( $, undefined ) {

var tabId = 0,
        rhash = /#.*$/;

function getNextTabId() {
        return ++tabId;
}

function isLocal( anchor ) {
        return anchor.hash.length > 1 &&
                anchor.href.replace( rhash, "" ) ===
                        location.href.replace( rhash, "" )
                                // support: Safari 5.1
                                // Safari 5.1 doesn't encode spaces in window.location
                                // but it does encode spaces from anchors (#8777)
                                .replace( /\s/g, "%20" );
}

$.widget( "ui.tabs", {
        version: "1.9.2",
        delay: 300,
        options: {
                active: null,
                collapsible: false,
                event: "click",
                heightStyle: "content",
                hide: null,
                show: null,

                // callbacks
                activate: null,
                beforeActivate: null,
                beforeLoad: null,
                load: null
        },

        _create: function() {
                var that = this,
                        options = this.options,
                        active = options.active,
                        locationHash = location.hash.substring( 1 );

                this.running = false;

                this.element
                        .addClass( "ui-tabs ui-widget ui-widget-content ui-corner-all" )
                        .toggleClass( "ui-tabs-collapsible", options.collapsible )
                        // Prevent users from focusing disabled tabs via click
                        .delegate( ".ui-tabs-nav > li", "mousedown" + this.eventNamespace, function( event ) {
                                if ( $( this ).is( ".ui-state-disabled" ) ) {
                                        event.preventDefault();
                                }
                        })
                        // support: IE <9
                        // Preventing the default action in mousedown doesn't prevent IE
                        // from focusing the element, so if the anchor gets focused, blur.
                        // We don't have to worry about focusing the previously focused
                        // element since clicking on a non-focusable element should focus
                        // the body anyway.
                        .delegate( ".ui-tabs-anchor", "focus" + this.eventNamespace, function() {
                                if ( $( this ).closest( "li" ).is( ".ui-state-disabled" ) ) {
                                        this.blur();
                                }
                        });

                this._processTabs();

                if ( active === null ) {
                        // check the fragment identifier in the URL
                        if ( locationHash ) {
                                this.tabs.each(function( i, tab ) {
                                        if ( $( tab ).attr( "aria-controls" ) === locationHash ) {
                                                active = i;
                                                return false;
                                        }
                                });
                        }

                        // check for a tab marked active via a class
                        if ( active === null ) {
                                active = this.tabs.index( this.tabs.filter( ".ui-tabs-active" ) );
                        }

                        // no active tab, set to false
                        if ( active === null || active === -1 ) {
                                active = this.tabs.length ? 0 : false;
                        }
                }

                // handle numbers: negative, out of range
                if ( active !== false ) {
                        active = this.tabs.index( this.tabs.eq( active ) );
                        if ( active === -1 ) {
                                active = options.collapsible ? false : 0;
                        }
                }
                options.active = active;

                // don't allow collapsible: false and active: false
                if ( !options.collapsible && options.active === false && this.anchors.length ) {
                        options.active = 0;
                }

                // Take disabling tabs via class attribute from HTML
                // into account and update option properly.
                if ( $.isArray( options.disabled ) ) {
                        options.disabled = $.unique( options.disabled.concat(
                                $.map( this.tabs.filter( ".ui-state-disabled" ), function( li ) {
                                        return that.tabs.index( li );
                                })
                        ) ).sort();
                }

                // check for length avoids error when initializing empty list
                if ( this.options.active !== false && this.anchors.length ) {
                        this.active = this._findActive( this.options.active );
                } else {
                        this.active = $();
                }

                this._refresh();

                if ( this.active.length ) {
                        this.load( options.active );
                }
        },

        _getCreateEventData: function() {
                return {
                        tab: this.active,
                        panel: !this.active.length ? $() : this._getPanelForTab( this.active )
                };
        },

        _tabKeydown: function( event ) {
                var focusedTab = $( this.document[0].activeElement ).closest( "li" ),
                        selectedIndex = this.tabs.index( focusedTab ),
                        goingForward = true;

                if ( this._handlePageNav( event ) ) {
                        return;
                }

                switch ( event.keyCode ) {
                        case $.ui.keyCode.RIGHT:
                        case $.ui.keyCode.DOWN:
                                selectedIndex++;
                                break;
                        case $.ui.keyCode.UP:
                        case $.ui.keyCode.LEFT:
                                goingForward = false;
                                selectedIndex--;
                                break;
                        case $.ui.keyCode.END:
                                selectedIndex = this.anchors.length - 1;
                                break;
                        case $.ui.keyCode.HOME:
                                selectedIndex = 0;
                                break;
                        case $.ui.keyCode.SPACE:
                                // Activate only, no collapsing
                                event.preventDefault();
                                clearTimeout( this.activating );
                                this._activate( selectedIndex );
                                return;
                        case $.ui.keyCode.ENTER:
                                // Toggle (cancel delayed activation, allow collapsing)
                                event.preventDefault();
                                clearTimeout( this.activating );
                                // Determine if we should collapse or activate
                                this._activate( selectedIndex === this.options.active ? false : selectedIndex );
                                return;
                        default:
                                return;
                }

                // Focus the appropriate tab, based on which key was pressed
                event.preventDefault();
                clearTimeout( this.activating );
                selectedIndex = this._focusNextTab( selectedIndex, goingForward );

                // Navigating with control key will prevent automatic activation
                if ( !event.ctrlKey ) {
                        // Update aria-selected immediately so that AT think the tab is already selected.
                        // Otherwise AT may confuse the user by stating that they need to activate the tab,
                        // but the tab will already be activated by the time the announcement finishes.
                        focusedTab.attr( "aria-selected", "false" );
                        this.tabs.eq( selectedIndex ).attr( "aria-selected", "true" );

                        this.activating = this._delay(function() {
                                this.option( "active", selectedIndex );
                        }, this.delay );
                }
        },

        _panelKeydown: function( event ) {
                if ( this._handlePageNav( event ) ) {
                        return;
                }

                // Ctrl+up moves focus to the current tab
                if ( event.ctrlKey && event.keyCode === $.ui.keyCode.UP ) {
                        event.preventDefault();
                        this.active.focus();
                }
        },

        // Alt+page up/down moves focus to the previous/next tab (and activates)
        _handlePageNav: function( event ) {
                if ( event.altKey && event.keyCode === $.ui.keyCode.PAGE_UP ) {
                        this._activate( this._focusNextTab( this.options.active - 1, false ) );
                        return true;
                }
                if ( event.altKey && event.keyCode === $.ui.keyCode.PAGE_DOWN ) {
                        this._activate( this._focusNextTab( this.options.active + 1, true ) );
                        return true;
                }
        },

        _findNextTab: function( index, goingForward ) {
                var lastTabIndex = this.tabs.length - 1;

                function constrain() {
                        if ( index > lastTabIndex ) {
                                index = 0;
                        }
                        if ( index < 0 ) {
                                index = lastTabIndex;
                        }
                        return index;
                }

                while ( $.inArray( constrain(), this.options.disabled ) !== -1 ) {
                        index = goingForward ? index + 1 : index - 1;
                }

                return index;
        },

        _focusNextTab: function( index, goingForward ) {
                index = this._findNextTab( index, goingForward );
                this.tabs.eq( index ).focus();
                return index;
        },

        _setOption: function( key, value ) {
                if ( key === "active" ) {
                        // _activate() will handle invalid values and update this.options
                        this._activate( value );
                        return;
                }

                if ( key === "disabled" ) {
                        // don't use the widget factory's disabled handling
                        this._setupDisabled( value );
                        return;
                }

                this._super( key, value);

                if ( key === "collapsible" ) {
                        this.element.toggleClass( "ui-tabs-collapsible", value );
                        // Setting collapsible: false while collapsed; open first panel
                        if ( !value && this.options.active === false ) {
                                this._activate( 0 );
                        }
                }

                if ( key === "event" ) {
                        this._setupEvents( value );
                }

                if ( key === "heightStyle" ) {
                        this._setupHeightStyle( value );
                }
        },

        _tabId: function( tab ) {
                return tab.attr( "aria-controls" ) || "ui-tabs-" + getNextTabId();
        },

        _sanitizeSelector: function( hash ) {
                return hash ? hash.replace( /[!"$%&'()*+,.\/:;<=>?@\[\]\^`{|}~]/g, "\\$&" ) : "";
        },

        refresh: function() {
                var options = this.options,
                        lis = this.tablist.children( ":has(a[href])" );

                // get disabled tabs from class attribute from HTML
                // this will get converted to a boolean if needed in _refresh()
                options.disabled = $.map( lis.filter( ".ui-state-disabled" ), function( tab ) {
                        return lis.index( tab );
                });

                this._processTabs();

                // was collapsed or no tabs
                if ( options.active === false || !this.anchors.length ) {
                        options.active = false;
                        this.active = $();
                // was active, but active tab is gone
                } else if ( this.active.length && !$.contains( this.tablist[ 0 ], this.active[ 0 ] ) ) {
                        // all remaining tabs are disabled
                        if ( this.tabs.length === options.disabled.length ) {
                                options.active = false;
                                this.active = $();
                        // activate previous tab
                        } else {
                                this._activate( this._findNextTab( Math.max( 0, options.active - 1 ), false ) );
                        }
                // was active, active tab still exists
                } else {
                        // make sure active index is correct
                        options.active = this.tabs.index( this.active );
                }

                this._refresh();
        },

        _refresh: function() {
                this._setupDisabled( this.options.disabled );
                this._setupEvents( this.options.event );
                this._setupHeightStyle( this.options.heightStyle );

                this.tabs.not( this.active ).attr({
                        "aria-selected": "false",
                        tabIndex: -1
                });
                this.panels.not( this._getPanelForTab( this.active ) )
                        .hide()
                        .attr({
                                "aria-expanded": "false",
                                "aria-hidden": "true"
                        });

                // Make sure one tab is in the tab order
                if ( !this.active.length ) {
                        this.tabs.eq( 0 ).attr( "tabIndex", 0 );
                } else {
                        this.active
                                .addClass( "ui-tabs-active ui-state-active" )
                                .attr({
                                        "aria-selected": "true",
                                        tabIndex: 0
                                });
                        this._getPanelForTab( this.active )
                                .show()
                                .attr({
                                        "aria-expanded": "true",
                                        "aria-hidden": "false"
                                });
                }
        },

        _processTabs: function() {
                var that = this;

                this.tablist = this._getList()
                        .addClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" )
                        .attr( "role", "tablist" );

                this.tabs = this.tablist.find( "> li:has(a[href])" )
                        .addClass( "ui-state-default ui-corner-top" )
                        .attr({
                                role: "tab",
                                tabIndex: -1
                        });

                this.anchors = this.tabs.map(function() {
                                return $( "a", this )[ 0 ];
                        })
                        .addClass( "ui-tabs-anchor" )
                        .attr({
                                role: "presentation",
                                tabIndex: -1
                        });

                this.panels = $();

                this.anchors.each(function( i, anchor ) {
                        var selector, panel, panelId,
                                anchorId = $( anchor ).uniqueId().attr( "id" ),
                                tab = $( anchor ).closest( "li" ),
                                originalAriaControls = tab.attr( "aria-controls" );

                        // inline tab
                        if ( isLocal( anchor ) ) {
                                selector = anchor.hash;
                                panel = that.element.find( that._sanitizeSelector( selector ) );
                        // remote tab
                        } else {
                                panelId = that._tabId( tab );
                                selector = "#" + panelId;
                                panel = that.element.find( selector );
                                if ( !panel.length ) {
                                        panel = that._createPanel( panelId );
                                        panel.insertAfter( that.panels[ i - 1 ] || that.tablist );
                                }
                                panel.attr( "aria-live", "polite" );
                        }

                        if ( panel.length) {
                                that.panels = that.panels.add( panel );
                        }
                        if ( originalAriaControls ) {
                                tab.data( "ui-tabs-aria-controls", originalAriaControls );
                        }
                        tab.attr({
                                "aria-controls": selector.substring( 1 ),
                                "aria-labelledby": anchorId
                        });
                        panel.attr( "aria-labelledby", anchorId );
                });

                this.panels
                        .addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
                        .attr( "role", "tabpanel" );
        },

        // allow overriding how to find the list for rare usage scenarios (#7715)
        _getList: function() {
                return this.element.find( "ol,ul" ).eq( 0 );
        },

        _createPanel: function( id ) {
                return $( "<div>" )
                        .attr( "id", id )
                        .addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
                        .data( "ui-tabs-destroy", true );
        },

        _setupDisabled: function( disabled ) {
                if ( $.isArray( disabled ) ) {
                        if ( !disabled.length ) {
                                disabled = false;
                        } else if ( disabled.length === this.anchors.length ) {
                                disabled = true;
                        }
                }

                // disable tabs
                for ( var i = 0, li; ( li = this.tabs[ i ] ); i++ ) {
                        if ( disabled === true || $.inArray( i, disabled ) !== -1 ) {
                                $( li )
                                        .addClass( "ui-state-disabled" )
                                        .attr( "aria-disabled", "true" );
                        } else {
                                $( li )
                                        .removeClass( "ui-state-disabled" )
                                        .removeAttr( "aria-disabled" );
                        }
                }

                this.options.disabled = disabled;
        },

        _setupEvents: function( event ) {
                var events = {
                        click: function( event ) {
                                event.preventDefault();
                        }
                };
                if ( event ) {
                        $.each( event.split(" "), function( index, eventName ) {
                                events[ eventName ] = "_eventHandler";
                        });
                }

                this._off( this.anchors.add( this.tabs ).add( this.panels ) );
                this._on( this.anchors, events );
                this._on( this.tabs, { keydown: "_tabKeydown" } );
                this._on( this.panels, { keydown: "_panelKeydown" } );

                this._focusable( this.tabs );
                this._hoverable( this.tabs );
        },

        _setupHeightStyle: function( heightStyle ) {
                var maxHeight, overflow,
                        parent = this.element.parent();

                if ( heightStyle === "fill" ) {
                        // IE 6 treats height like minHeight, so we need to turn off overflow
                        // in order to get a reliable height
                        // we use the minHeight support test because we assume that only
                        // browsers that don't support minHeight will treat height as minHeight
                        if ( !$.support.minHeight ) {
                                overflow = parent.css( "overflow" );
                                parent.css( "overflow", "hidden");
                        }
                        maxHeight = parent.height();
                        this.element.siblings( ":visible" ).each(function() {
                                var elem = $( this ),
                                        position = elem.css( "position" );

                                if ( position === "absolute" || position === "fixed" ) {
                                        return;
                                }
                                maxHeight -= elem.outerHeight( true );
                        });
                        if ( overflow ) {
                                parent.css( "overflow", overflow );
                        }

                        this.element.children().not( this.panels ).each(function() {
                                maxHeight -= $( this ).outerHeight( true );
                        });

                        this.panels.each(function() {
                                $( this ).height( Math.max( 0, maxHeight -
                                        $( this ).innerHeight() + $( this ).height() ) );
                        })
                        .css( "overflow", "auto" );
                } else if ( heightStyle === "auto" ) {
                        maxHeight = 0;
                        this.panels.each(function() {
                                maxHeight = Math.max( maxHeight, $( this ).height( "" ).height() );
                        }).height( maxHeight );
                }
        },

        _eventHandler: function( event ) {
                var options = this.options,
                        active = this.active,
                        anchor = $( event.currentTarget ),
                        tab = anchor.closest( "li" ),
                        clickedIsActive = tab[ 0 ] === active[ 0 ],
                        collapsing = clickedIsActive && options.collapsible,
                        toShow = collapsing ? $() : this._getPanelForTab( tab ),
                        toHide = !active.length ? $() : this._getPanelForTab( active ),
                        eventData = {
                                oldTab: active,
                                oldPanel: toHide,
                                newTab: collapsing ? $() : tab,
                                newPanel: toShow
                        };

                event.preventDefault();

                if ( tab.hasClass( "ui-state-disabled" ) ||
                                // tab is already loading
                                tab.hasClass( "ui-tabs-loading" ) ||
                                // can't switch durning an animation
                                this.running ||
                                // click on active header, but not collapsible
                                ( clickedIsActive && !options.collapsible ) ||
                                // allow canceling activation
                                ( this._trigger( "beforeActivate", event, eventData ) === false ) ) {
                        return;
                }

                options.active = collapsing ? false : this.tabs.index( tab );

                this.active = clickedIsActive ? $() : tab;
                if ( this.xhr ) {
                        this.xhr.abort();
                }

                if ( !toHide.length && !toShow.length ) {
                        $.error( "jQuery UI Tabs: Mismatching fragment identifier." );
                }

                if ( toShow.length ) {
                        this.load( this.tabs.index( tab ), event );
                }
                this._toggle( event, eventData );
        },

        // handles show/hide for selecting tabs
        _toggle: function( event, eventData ) {
                var that = this,
                        toShow = eventData.newPanel,
                        toHide = eventData.oldPanel;

                this.running = true;

                function complete() {
                        that.running = false;
                        that._trigger( "activate", event, eventData );
                }

                function show() {
                        eventData.newTab.closest( "li" ).addClass( "ui-tabs-active ui-state-active" );

                        if ( toShow.length && that.options.show ) {
                                that._show( toShow, that.options.show, complete );
                        } else {
                                toShow.show();
                                complete();
                        }
                }

                // start out by hiding, then showing, then completing
                if ( toHide.length && this.options.hide ) {
                        this._hide( toHide, this.options.hide, function() {
                                eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
                                show();
                        });
                } else {
                        eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
                        toHide.hide();
                        show();
                }

                toHide.attr({
                        "aria-expanded": "false",
                        "aria-hidden": "true"
                });
                eventData.oldTab.attr( "aria-selected", "false" );
                // If we're switching tabs, remove the old tab from the tab order.
                // If we're opening from collapsed state, remove the previous tab from the tab order.
                // If we're collapsing, then keep the collapsing tab in the tab order.
                if ( toShow.length && toHide.length ) {
                        eventData.oldTab.attr( "tabIndex", -1 );
                } else if ( toShow.length ) {
                        this.tabs.filter(function() {
                                return $( this ).attr( "tabIndex" ) === 0;
                        })
                        .attr( "tabIndex", -1 );
                }

                toShow.attr({
                        "aria-expanded": "true",
                        "aria-hidden": "false"
                });
                eventData.newTab.attr({
                        "aria-selected": "true",
                        tabIndex: 0
                });
        },

        _activate: function( index ) {
                var anchor,
                        active = this._findActive( index );

                // trying to activate the already active panel
                if ( active[ 0 ] === this.active[ 0 ] ) {
                        return;
                }

                // trying to collapse, simulate a click on the current active header
                if ( !active.length ) {
                        active = this.active;
                }

                anchor = active.find( ".ui-tabs-anchor" )[ 0 ];
                this._eventHandler({
                        target: anchor,
                        currentTarget: anchor,
                        preventDefault: $.noop
                });
        },

        _findActive: function( index ) {
                return index === false ? $() : this.tabs.eq( index );
        },

        _getIndex: function( index ) {
                // meta-function to give users option to provide a href string instead of a numerical index.
                if ( typeof index === "string" ) {
                        index = this.anchors.index( this.anchors.filter( "[href$='" + index + "']" ) );
                }

                return index;
        },

        _destroy: function() {
                if ( this.xhr ) {
                        this.xhr.abort();
                }

                this.element.removeClass( "ui-tabs ui-widget ui-widget-content ui-corner-all ui-tabs-collapsible" );

                this.tablist
                        .removeClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" )
                        .removeAttr( "role" );

                this.anchors
                        .removeClass( "ui-tabs-anchor" )
                        .removeAttr( "role" )
                        .removeAttr( "tabIndex" )
                        .removeData( "href.tabs" )
                        .removeData( "load.tabs" )
                        .removeUniqueId();

                this.tabs.add( this.panels ).each(function() {
                        if ( $.data( this, "ui-tabs-destroy" ) ) {
                                $( this ).remove();
                        } else {
                                $( this )
                                        .removeClass( "ui-state-default ui-state-active ui-state-disabled " +
                                                "ui-corner-top ui-corner-bottom ui-widget-content ui-tabs-active ui-tabs-panel" )
                                        .removeAttr( "tabIndex" )
                                        .removeAttr( "aria-live" )
                                        .removeAttr( "aria-busy" )
                                        .removeAttr( "aria-selected" )
                                        .removeAttr( "aria-labelledby" )
                                        .removeAttr( "aria-hidden" )
                                        .removeAttr( "aria-expanded" )
                                        .removeAttr( "role" );
                        }
                });

                this.tabs.each(function() {
                        var li = $( this ),
                                prev = li.data( "ui-tabs-aria-controls" );
                        if ( prev ) {
                                li.attr( "aria-controls", prev );
                        } else {
                                li.removeAttr( "aria-controls" );
                        }
                });

                this.panels.show();

                if ( this.options.heightStyle !== "content" ) {
                        this.panels.css( "height", "" );
                }
        },

        enable: function( index ) {
                var disabled = this.options.disabled;
                if ( disabled === false ) {
                        return;
                }

                if ( index === undefined ) {
                        disabled = false;
                } else {
                        index = this._getIndex( index );
                        if ( $.isArray( disabled ) ) {
                                disabled = $.map( disabled, function( num ) {
                                        return num !== index ? num : null;
                                });
                        } else {
                                disabled = $.map( this.tabs, function( li, num ) {
                                        return num !== index ? num : null;
                                });
                        }
                }
                this._setupDisabled( disabled );
        },

        disable: function( index ) {
                var disabled = this.options.disabled;
                if ( disabled === true ) {
                        return;
                }

                if ( index === undefined ) {
                        disabled = true;
                } else {
                        index = this._getIndex( index );
                        if ( $.inArray( index, disabled ) !== -1 ) {
                                return;
                        }
                        if ( $.isArray( disabled ) ) {
                                disabled = $.merge( [ index ], disabled ).sort();
                        } else {
                                disabled = [ index ];
                        }
                }
                this._setupDisabled( disabled );
        },

        load: function( index, event ) {
                index = this._getIndex( index );
                var that = this,
                        tab = this.tabs.eq( index ),
                        anchor = tab.find( ".ui-tabs-anchor" ),
                        panel = this._getPanelForTab( tab ),
                        eventData = {
                                tab: tab,
                                panel: panel
                        };

                // not remote
                if ( isLocal( anchor[ 0 ] ) ) {
                        return;
                }

                this.xhr = $.ajax( this._ajaxSettings( anchor, event, eventData ) );

                // support: jQuery <1.8
                // jQuery <1.8 returns false if the request is canceled in beforeSend,
                // but as of 1.8, $.ajax() always returns a jqXHR object.
                if ( this.xhr && this.xhr.statusText !== "canceled" ) {
                        tab.addClass( "ui-tabs-loading" );
                        panel.attr( "aria-busy", "true" );

                        this.xhr
                                .success(function( response ) {
                                        // support: jQuery <1.8
                                        // http://bugs.jquery.com/ticket/11778
                                        setTimeout(function() {
                                                panel.html( response );
                                                that._trigger( "load", event, eventData );
                                        }, 1 );
                                })
                                .complete(function( jqXHR, status ) {
                                        // support: jQuery <1.8
                                        // http://bugs.jquery.com/ticket/11778
                                        setTimeout(function() {
                                                if ( status === "abort" ) {
                                                        that.panels.stop( false, true );
                                                }

                                                tab.removeClass( "ui-tabs-loading" );
                                                panel.removeAttr( "aria-busy" );

                                                if ( jqXHR === that.xhr ) {
                                                        delete that.xhr;
                                                }
                                        }, 1 );
                                });
                }
        },

        // TODO: Remove this function in 1.10 when ajaxOptions is removed
        _ajaxSettings: function( anchor, event, eventData ) {
                var that = this;
                return {
                        url: anchor.attr( "href" ),
                        beforeSend: function( jqXHR, settings ) {
                                return that._trigger( "beforeLoad", event,
                                        $.extend( { jqXHR : jqXHR, ajaxSettings: settings }, eventData ) );
                        }
                };
        },

        _getPanelForTab: function( tab ) {
                var id = $( tab ).attr( "aria-controls" );
                return this.element.find( this._sanitizeSelector( "#" + id ) );
        }
});

// DEPRECATED
if ( $.uiBackCompat !== false ) {

        // helper method for a lot of the back compat extensions
        $.ui.tabs.prototype._ui = function( tab, panel ) {
                return {
                        tab: tab,
                        panel: panel,
                        index: this.anchors.index( tab )
                };
        };

        // url method
        $.widget( "ui.tabs", $.ui.tabs, {
                url: function( index, url ) {
                        this.anchors.eq( index ).attr( "href", url );
                }
        });

        // TODO: Remove _ajaxSettings() method when removing this extension
        // ajaxOptions and cache options
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        ajaxOptions: null,
                        cache: false
                },

                _create: function() {
                        this._super();

                        var that = this;

                        this._on({ tabsbeforeload: function( event, ui ) {
                                // tab is already cached
                                if ( $.data( ui.tab[ 0 ], "cache.tabs" ) ) {
                                        event.preventDefault();
                                        return;
                                }

                                ui.jqXHR.success(function() {
                                        if ( that.options.cache ) {
                                                $.data( ui.tab[ 0 ], "cache.tabs", true );
                                        }
                                });
                        }});
                },

                _ajaxSettings: function( anchor, event, ui ) {
                        var ajaxOptions = this.options.ajaxOptions;
                        return $.extend( {}, ajaxOptions, {
                                error: function( xhr, status ) {
                                        try {
                                                // Passing index avoid a race condition when this method is
                                                // called after the user has selected another tab.
                                                // Pass the anchor that initiated this request allows
                                                // loadError to manipulate the tab content panel via $(a.hash)
                                                ajaxOptions.error(
                                                        xhr, status, ui.tab.closest( "li" ).index(), ui.tab[ 0 ] );
                                        }
                                        catch ( error ) {}
                                }
                        }, this._superApply( arguments ) );
                },

                _setOption: function( key, value ) {
                        // reset cache if switching from cached to not cached
                        if ( key === "cache" && value === false ) {
                                this.anchors.removeData( "cache.tabs" );
                        }
                        this._super( key, value );
                },

                _destroy: function() {
                        this.anchors.removeData( "cache.tabs" );
                        this._super();
                },

                url: function( index ){
                        this.anchors.eq( index ).removeData( "cache.tabs" );
                        this._superApply( arguments );
                }
        });

        // abort method
        $.widget( "ui.tabs", $.ui.tabs, {
                abort: function() {
                        if ( this.xhr ) {
                                this.xhr.abort();
                        }
                }
        });

        // spinner
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        spinner: "<em>Loading&#8230;</em>"
                },
                _create: function() {
                        this._super();
                        this._on({
                                tabsbeforeload: function( event, ui ) {
                                        // Don't react to nested tabs or tabs that don't use a spinner
                                        if ( event.target !== this.element[ 0 ] ||
                                                        !this.options.spinner ) {
                                                return;
                                        }

                                        var span = ui.tab.find( "span" ),
                                                html = span.html();
                                        span.html( this.options.spinner );
                                        ui.jqXHR.complete(function() {
                                                span.html( html );
                                        });
                                }
                        });
                }
        });

        // enable/disable events
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        enable: null,
                        disable: null
                },

                enable: function( index ) {
                        var options = this.options,
                                trigger;

                        if ( index && options.disabled === true ||
                                        ( $.isArray( options.disabled ) && $.inArray( index, options.disabled ) !== -1 ) ) {
                                trigger = true;
                        }

                        this._superApply( arguments );

                        if ( trigger ) {
                                this._trigger( "enable", null, this._ui( this.anchors[ index ], this.panels[ index ] ) );
                        }
                },

                disable: function( index ) {
                        var options = this.options,
                                trigger;

                        if ( index && options.disabled === false ||
                                        ( $.isArray( options.disabled ) && $.inArray( index, options.disabled ) === -1 ) ) {
                                trigger = true;
                        }

                        this._superApply( arguments );

                        if ( trigger ) {
                                this._trigger( "disable", null, this._ui( this.anchors[ index ], this.panels[ index ] ) );
                        }
                }
        });

        // add/remove methods and events
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        add: null,
                        remove: null,
                        tabTemplate: "<li><a href='#{href}'><span>#{label}</span></a></li>"
                },

                add: function( url, label, index ) {
                        if ( index === undefined ) {
                                index = this.anchors.length;
                        }

                        var doInsertAfter, panel,
                                options = this.options,
                                li = $( options.tabTemplate
                                        .replace( /#\{href\}/g, url )
                                        .replace( /#\{label\}/g, label ) ),
                                id = !url.indexOf( "#" ) ?
                                        url.replace( "#", "" ) :
                                        this._tabId( li );

                        li.addClass( "ui-state-default ui-corner-top" ).data( "ui-tabs-destroy", true );
                        li.attr( "aria-controls", id );

                        doInsertAfter = index >= this.tabs.length;

                        // try to find an existing element before creating a new one
                        panel = this.element.find( "#" + id );
                        if ( !panel.length ) {
                                panel = this._createPanel( id );
                                if ( doInsertAfter ) {
                                        if ( index > 0 ) {
                                                panel.insertAfter( this.panels.eq( -1 ) );
                                        } else {
                                                panel.appendTo( this.element );
                                        }
                                } else {
                                        panel.insertBefore( this.panels[ index ] );
                                }
                        }
                        panel.addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" ).hide();

                        if ( doInsertAfter ) {
                                li.appendTo( this.tablist );
                        } else {
                                li.insertBefore( this.tabs[ index ] );
                        }

                        options.disabled = $.map( options.disabled, function( n ) {
                                return n >= index ? ++n : n;
                        });

                        this.refresh();
                        if ( this.tabs.length === 1 && options.active === false ) {
                                this.option( "active", 0 );
                        }

                        this._trigger( "add", null, this._ui( this.anchors[ index ], this.panels[ index ] ) );
                        return this;
                },

                remove: function( index ) {
                        index = this._getIndex( index );
                        var options = this.options,
                                tab = this.tabs.eq( index ).remove(),
                                panel = this._getPanelForTab( tab ).remove();

                        // If selected tab was removed focus tab to the right or
                        // in case the last tab was removed the tab to the left.
                        // We check for more than 2 tabs, because if there are only 2,
                        // then when we remove this tab, there will only be one tab left
                        // so we don't need to detect which tab to activate.
                        if ( tab.hasClass( "ui-tabs-active" ) && this.anchors.length > 2 ) {
                                this._activate( index + ( index + 1 < this.anchors.length ? 1 : -1 ) );
                        }

                        options.disabled = $.map(
                                $.grep( options.disabled, function( n ) {
                                        return n !== index;
                                }),
                                function( n ) {
                                        return n >= index ? --n : n;
                                });

                        this.refresh();

                        this._trigger( "remove", null, this._ui( tab.find( "a" )[ 0 ], panel[ 0 ] ) );
                        return this;
                }
        });

        // length method
        $.widget( "ui.tabs", $.ui.tabs, {
                length: function() {
                        return this.anchors.length;
                }
        });

        // panel ids (idPrefix option + title attribute)
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        idPrefix: "ui-tabs-"
                },

                _tabId: function( tab ) {
                        var a = tab.is( "li" ) ? tab.find( "a[href]" ) : tab;
                        a = a[0];
                        return $( a ).closest( "li" ).attr( "aria-controls" ) ||
                                a.title && a.title.replace( /\s/g, "_" ).replace( /[^\w\u00c0-\uFFFF\-]/g, "" ) ||
                                this.options.idPrefix + getNextTabId();
                }
        });

        // _createPanel method
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        panelTemplate: "<div></div>"
                },

                _createPanel: function( id ) {
                        return $( this.options.panelTemplate )
                                .attr( "id", id )
                                .addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
                                .data( "ui-tabs-destroy", true );
                }
        });

        // selected option
        $.widget( "ui.tabs", $.ui.tabs, {
                _create: function() {
                        var options = this.options;
                        if ( options.active === null && options.selected !== undefined ) {
                                options.active = options.selected === -1 ? false : options.selected;
                        }
                        this._super();
                        options.selected = options.active;
                        if ( options.selected === false ) {
                                options.selected = -1;
                        }
                },

                _setOption: function( key, value ) {
                        if ( key !== "selected" ) {
                                return this._super( key, value );
                        }

                        var options = this.options;
                        this._super( "active", value === -1 ? false : value );
                        options.selected = options.active;
                        if ( options.selected === false ) {
                                options.selected = -1;
                        }
                },

                _eventHandler: function() {
                        this._superApply( arguments );
                        this.options.selected = this.options.active;
                        if ( this.options.selected === false ) {
                                this.options.selected = -1;
                        }
                }
        });

        // show and select event
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        show: null,
                        select: null
                },
                _create: function() {
                        this._super();
                        if ( this.options.active !== false ) {
                                this._trigger( "show", null, this._ui(
                                        this.active.find( ".ui-tabs-anchor" )[ 0 ],
                                        this._getPanelForTab( this.active )[ 0 ] ) );
                        }
                },
                _trigger: function( type, event, data ) {
                        var tab, panel,
                                ret = this._superApply( arguments );

                        if ( !ret ) {
                                return false;
                        }

                        if ( type === "beforeActivate" ) {
                                tab = data.newTab.length ? data.newTab : data.oldTab;
                                panel = data.newPanel.length ? data.newPanel : data.oldPanel;
                                ret = this._super( "select", event, {
                                        tab: tab.find( ".ui-tabs-anchor" )[ 0],
                                        panel: panel[ 0 ],
                                        index: tab.closest( "li" ).index()
                                });
                        } else if ( type === "activate" && data.newTab.length ) {
                                ret = this._super( "show", event, {
                                        tab: data.newTab.find( ".ui-tabs-anchor" )[ 0 ],
                                        panel: data.newPanel[ 0 ],
                                        index: data.newTab.closest( "li" ).index()
                                });
                        }
                        return ret;
                }
        });

        // select method
        $.widget( "ui.tabs", $.ui.tabs, {
                select: function( index ) {
                        index = this._getIndex( index );
                        if ( index === -1 ) {
                                if ( this.options.collapsible && this.options.selected !== -1 ) {
                                        index = this.options.selected;
                                } else {
                                        return;
                                }
                        }
                        this.anchors.eq( index ).trigger( this.options.event + this.eventNamespace );
                }
        });

        // cookie option
        (function() {

        var listId = 0;

        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        cookie: null // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }
                },
                _create: function() {
                        var options = this.options,
                                active;
                        if ( options.active == null && options.cookie ) {
                                active = parseInt( this._cookie(), 10 );
                                if ( active === -1 ) {
                                        active = false;
                                }
                                options.active = active;
                        }
                        this._super();
                },
                _cookie: function( active ) {
                        var cookie = [ this.cookie ||
                                ( this.cookie = this.options.cookie.name || "ui-tabs-" + (++listId) ) ];
                        if ( arguments.length ) {
                                cookie.push( active === false ? -1 : active );
                                cookie.push( this.options.cookie );
                        }
                        return $.cookie.apply( null, cookie );
                },
                _refresh: function() {
                        this._super();
                        if ( this.options.cookie ) {
                                this._cookie( this.options.active, this.options.cookie );
                        }
                },
                _eventHandler: function() {
                        this._superApply( arguments );
                        if ( this.options.cookie ) {
                                this._cookie( this.options.active, this.options.cookie );
                        }
                },
                _destroy: function() {
                        this._super();
                        if ( this.options.cookie ) {
                                this._cookie( null, this.options.cookie );
                        }
                }
        });

        })();

        // load event
        $.widget( "ui.tabs", $.ui.tabs, {
                _trigger: function( type, event, data ) {
                        var _data = $.extend( {}, data );
                        if ( type === "load" ) {
                                _data.panel = _data.panel[ 0 ];
                                _data.tab = _data.tab.find( ".ui-tabs-anchor" )[ 0 ];
                        }
                        return this._super( type, event, _data );
                }
        });

        // fx option
        // The new animation options (show, hide) conflict with the old show callback.
        // The old fx option wins over show/hide anyway (always favor back-compat).
        // If a user wants to use the new animation API, they must give up the old API.
        $.widget( "ui.tabs", $.ui.tabs, {
                options: {
                        fx: null // e.g. { height: "toggle", opacity: "toggle", duration: 200 }
                },

                _getFx: function() {
                        var hide, show,
                                fx = this.options.fx;

                        if ( fx ) {
                                if ( $.isArray( fx ) ) {
                                        hide = fx[ 0 ];
                                        show = fx[ 1 ];
                                } else {
                                        hide = show = fx;
                                }
                        }

                        return fx ? { show: show, hide: hide } : null;
                },

                _toggle: function( event, eventData ) {
                        var that = this,
                                toShow = eventData.newPanel,
                                toHide = eventData.oldPanel,
                                fx = this._getFx();

                        if ( !fx ) {
                                return this._super( event, eventData );
                        }

                        that.running = true;

                        function complete() {
                                that.running = false;
                                that._trigger( "activate", event, eventData );
                        }

                        function show() {
                                eventData.newTab.closest( "li" ).addClass( "ui-tabs-active ui-state-active" );

                                if ( toShow.length && fx.show ) {
                                        toShow
                                                .animate( fx.show, fx.show.duration, function() {
                                                        complete();
                                                });
                                } else {
                                        toShow.show();
                                        complete();
                                }
                        }

                        // start out by hiding, then showing, then completing
                        if ( toHide.length && fx.hide ) {
                                toHide.animate( fx.hide, fx.hide.duration, function() {
                                        eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
                                        show();
                                });
                        } else {
                                eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
                                toHide.hide();
                                show();
                        }
                }
        });
}

})( jQuery );