/*
 * jQuery UI Tabs @VERSION
 *
 * Copyright (c) 2009 AUTHORS.txt (http://ui.jquery.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Tabs
 *
 * Depends:
 *      ui.core.js
 */
(function($) {

$.widget("ui.tabs", {

        _init: function() {
                // create tabs
                this._tabify(true);
        },

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

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

                this.list.unbind('.tabs')
                        .removeClass('ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all')
                        .removeData('tabs');

                this.$tabs.each(function() {
                        var href = $.data(this, 'href.tabs');
                        if (href)
                                this.href = href;
                        var $this = $(this).unbind('.tabs');
                        $.each(['href', 'load', 'cache'], function(i, prefix) {
                                $this.removeData(prefix + '.tabs');
                        });
                });

                this.$lis.unbind('.tabs').add(this.$panels).each(function() {
                        if ($.data(this, 'destroy.tabs'))
                                $(this).remove();
                        else
                                $(this).removeClass(
                                        'ui-state-default ' +
                                        'ui-corner-top ' +
                                        'ui-tabs-selected ' +
                                        'ui-state-active ' +
                                        'ui-tabs-deselectable ' +
                                        'ui-state-disabled ' +
                                        'ui-tabs-panel ' +
                                        'ui-widget-content ' +
                                        'ui-corner-bottom ' +
                                        'ui-tabs-hide');
                });

                if (o.cookie)
                        this._cookie(null, o.cookie);
        },

        _setData: function(key, value) {
                if ((/^selected/).test(key))
                        this.select(value);
                else {
                        this.options[key] = value;
                        this._tabify();
                }
        },

        length: function() {
                return this.$tabs.length;
        },

        _tabId: function(a) {
                return a.title && a.title.replace(/\s/g, '_').replace(/[^A-Za-z0-9\-_:\.]/g, '')
                        || this.options.idPrefix + $.data(a);
        },

        _sanitizeSelector: function(hash) {
                return hash.replace(/:/g, '\\:'); // we need this because an id may contain a ":"
        },

        _cookie: function() {
                var cookie = this.cookie || (this.cookie = this.options.cookie.name || 'ui-tabs-' + $.data(this.list[0]));
                return $.cookie.apply(null, [cookie].concat($.makeArray(arguments)));
        },

        _tabify: function(init) {

                this.list = this.element.is('div') ? this.element.children('ul:first, ol:first').eq(0) : this.element;
                this.$lis = $('li:has(a[href])', this.list);
                this.$tabs = this.$lis.map(function() { return $('a', this)[0]; });
                this.$panels = $([]);

                var self = this, o = this.options;

                var fragmentId = /^#.+/; // Safari 2 reports '#' for an empty hash
                this.$tabs.each(function(i, a) {
                        var href = $(a).attr('href');

                        // inline tab
                        if (fragmentId.test(href))
                                self.$panels = self.$panels.add(self._sanitizeSelector(href));

                        // remote tab
                        else if (href != '#') { // prevent loading the page itself if href is just "#"
                                $.data(a, 'href.tabs', href); // required for restore on destroy

                                // TODO until #3808 is fixed strip fragment identifier from url
                                // (IE fails to load from such url)
                                $.data(a, 'load.tabs', href.replace(/#.*$/, '')); // mutable data

                                var id = self._tabId(a);
                                a.href = '#' + id;
                                var $panel = $('#' + id);
                                if (!$panel.length) {
                                        $panel = $(o.panelTemplate).attr('id', id).addClass('ui-tabs-panel ui-widget-content ui-corner-bottom')
                                                .insertAfter(self.$panels[i - 1] || self.list);
                                        $panel.data('destroy.tabs', true);
                                }
                                self.$panels = self.$panels.add($panel);
                        }

                        // invalid tab href
                        else
                                o.disabled.push(i + 1);
                });

                // initialization from scratch
                if (init) {

                        // attach necessary classes for styling
                        if (this.element.is('div')) {
                                this.element.addClass('ui-tabs ui-widget ui-widget-content ui-corner-all');
                        }
                        this.list.addClass('ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all');
                        this.$lis.addClass('ui-state-default ui-corner-top');
                        this.$panels.addClass('ui-tabs-panel ui-widget-content ui-corner-bottom');

                        // Selected tab
                        // use "selected" option or try to retrieve:
                        // 1. from fragment identifier in url
                        // 2. from cookie
                        // 3. from selected class attribute on <li>
                        if (o.selected === undefined) {
                                if (location.hash) {
                                        this.$tabs.each(function(i, a) {
                                                if (a.hash == location.hash) {
                                                        o.selected = i;
                                                        return false; // break
                                                }
                                        });
                                }
                                else if (o.cookie)
                                        o.selected = parseInt(self._cookie(), 10);

                                else if (this.$lis.filter('.ui-tabs-selected').length)
                                        o.selected = this.$lis.index(this.$lis.filter('.ui-tabs-selected'));

                                else
                                        o.selected = 0;

                        }
                        else if (o.selected === null)
                                o.selected = -1;

                        // sanity check
                        o.selected = ((o.selected >= 0 && this.$tabs[o.selected]) || o.selected < 0) ? o.selected : 0; // default to first tab

                        // Take disabling tabs via class attribute from HTML
                        // into account and update option properly.
                        // A selected tab cannot become disabled.
                        o.disabled = $.unique(o.disabled.concat(
                                $.map(this.$lis.filter('.ui-state-disabled'),
                                        function(n, i) { return self.$lis.index(n); } )
                        )).sort();
                        if ($.inArray(o.selected, o.disabled) != -1)
                                o.disabled.splice($.inArray(o.selected, o.disabled), 1);

                        // highlight selected tab
                        this.$panels.addClass('ui-tabs-hide');
                        this.$lis.removeClass('ui-tabs-selected ui-state-active');
                        if (o.selected >= 0 && this.$tabs.length) { // check for length avoids error when initializing empty list
                                this.$panels.eq(o.selected).removeClass('ui-tabs-hide');
                                var classes = ['ui-tabs-selected ui-state-active'];
                                if (o.deselectable) classes.push('ui-tabs-deselectable');
                                this.$lis.eq(o.selected).addClass(classes.join(' '));

                                // seems to be expected behavior that the show callback is fired
                                var onShow = function() {
                                        self._trigger('show', null,
                                                self.ui(self.$tabs[o.selected], self.$panels[o.selected]));
                                };

                                // load if remote tab
                                if ($.data(this.$tabs[o.selected], 'load.tabs'))
                                        this.load(o.selected, onShow);
                                // just trigger show event
                                else onShow();
                        }

                        // states
                        if (o.event != 'mouseover') {
                                var handleState = function(state, el) {
                                        if (el.is(':not(.ui-state-disabled)')) el.toggleClass('ui-state-' + state);
                                };
                                this.$lis.bind('mouseover.tabs mouseout.tabs', function() {
                                        handleState('hover', $(this));
                                });
                                // TODO focus/blur don't seem to work with namespace
                                this.$tabs.bind('focus.tabs blur.tabs', function() {
                                        handleState('focus', $(this).parents('li:first'));
                                });
                        }

                        // clean up to avoid memory leaks in certain versions of IE 6
                        $(window).bind('unload', function() {
                                self.$lis.add(self.$tabs).unbind('.tabs');
                                self.$lis = self.$tabs = self.$panels = null;
                        });

                }
                // update selected after add/remove
                else
                        o.selected = this.$lis.index(this.$lis.filter('.ui-tabs-selected')); // TODO check adding with all unselected

                // set or update cookie after init and add/remove respectively
                if (o.cookie) this._cookie(o.selected, o.cookie);

                // disable tabs
                for (var i = 0, li; li = this.$lis[i]; i++)
                        $(li)[$.inArray(i, o.disabled) != -1 && !$(li).hasClass('ui-tabs-selected') ? 'addClass' : 'removeClass']('ui-state-disabled');

                // reset cache if switching from cached to not cached
                if (o.cache === false) this.$tabs.removeData('cache.tabs');

                // set up animations
                var hideFx, showFx;
                if (o.fx) {
                        if ($.isArray(o.fx)) {
                                hideFx = o.fx[0];
                                showFx = o.fx[1];
                        }
                        else hideFx = showFx = o.fx;
                }

                // Reset certain styles left over from animation
                // and prevent IE's ClearType bug...
                function resetStyle($el, fx) {
                        $el.css({ display: '' });
                        if ($.browser.msie && fx.opacity) $el[0].style.removeAttribute('filter');
                }

                // Show a tab...
                var showTab = showFx ?
                        function(clicked, $show) {
                                $show.hide().removeClass('ui-tabs-hide') // avoid flicker that way
                                        .animate(showFx, 500, function() {
                                                resetStyle($show, showFx);
                                                self._trigger('show', null, self.ui(clicked, $show[0]));
                                        });
                        } :
                        function(clicked, $show) {
                                $show.removeClass('ui-tabs-hide');
                                self._trigger('show', null, self.ui(clicked, $show[0]));
                        };

                // Hide a tab, $show is optional...
                var hideTab = hideFx ?
                        function(clicked, $hide, $show) {
                                $hide.animate(hideFx, hideFx.duration || 'normal', function() {
                                        $hide.addClass('ui-tabs-hide');
                                        resetStyle($hide, hideFx);
                                        if ($show) showTab(clicked, $show);
                                });
                        } :
                        function(clicked, $hide, $show) {
                                $hide.addClass('ui-tabs-hide');
                                if ($show) showTab(clicked, $show);
                        };

                // Switch a tab...
                function switchTab(clicked, $li, $hide, $show) {
                        var classes = ['ui-tabs-selected ui-state-active'];
                        if (o.deselectable) classes.push('ui-tabs-deselectable');
                        $li.removeClass('ui-state-default').addClass(classes.join(' '))
                                .siblings().removeClass(classes.join(' ')).addClass('ui-state-default');
                        hideTab(clicked, $hide, $show);
                }

                // attach tab event handler, unbind to avoid duplicates from former tabifying...
                this.$tabs.unbind('.tabs').bind(o.event + '.tabs', function() {

                        var $li = $(this).parents('li:eq(0)'),
                                $hide = self.$panels.filter(':visible'),
                                $show = $(self._sanitizeSelector(this.hash));

                        // If tab is already selected and not deselectable or tab disabled or
                        // or is already loading or click callback returns false stop here.
                        // Check if click handler returns false last so that it is not executed
                        // for a disabled or loading tab!
                        if (($li.hasClass('ui-state-active') && !o.deselectable)
                                || $li.hasClass('ui-state-disabled')
                                || $(this).hasClass('ui-tabs-loading')
                                || self._trigger('select', null, self.ui(this, $show[0])) === false
                                ) {
                                this.blur();
                                return false;
                        }

                        o.selected = self.$tabs.index(this);

                        // if tab may be closed TODO avoid redundant code in this block
                        if (o.deselectable) {
                                if ($li.hasClass('ui-state-active')) {
                                        o.selected = -1;
                                        if (o.cookie) self._cookie(o.selected, o.cookie);
                                        $li.removeClass('ui-tabs-selected ui-state-active ui-tabs-deselectable')
                                                .addClass('ui-state-default');
                                        self.$panels.stop();
                                        hideTab(this, $hide);
                                        this.blur();
                                        return false;
                                } else if (!$hide.length) {
                                        if (o.cookie) self._cookie(o.selected, o.cookie);
                                        self.$panels.stop();
                                        var a = this;
                                        self.load(self.$tabs.index(this), function() {
                                                $li.addClass('ui-tabs-selected ui-state-active ui-tabs-deselectable')
                                                        .removeClass('ui-state-default');
                                                showTab(a, $show);
                                        });
                                        this.blur();
                                        return false;
                                }
                        }

                        if (o.cookie) self._cookie(o.selected, o.cookie);

                        // stop possibly running animations
                        self.$panels.stop();

                        // show new tab
                        if ($show.length) {
                                var a = this;
                                self.load(self.$tabs.index(this), $hide.length ?
                                        function() {
                                                switchTab(a, $li, $hide, $show);
                                        } :
                                        function() {
                                                $li.addClass('ui-tabs-selected ui-state-active').removeClass('ui-state-default');
                                                showTab(a, $show);
                                        }
                                );
                        } else
                                throw 'jQuery UI Tabs: Mismatching fragment identifier.';

                        // Prevent IE from keeping other link focussed when using the back button
                        // and remove dotted border from clicked link. This is controlled via CSS
                        // in modern browsers; blur() removes focus from address bar in Firefox
                        // which can become a usability and annoying problem with tabs('rotate').
                        if ($.browser.msie) this.blur();

                        return false;

                });

                // disable click if event is configured to something else
                if (o.event != 'click') this.$tabs.bind('click.tabs', function(){return false;});

        },

        add: function(url, label, index) {
                if (index == undefined)
                        index = this.$tabs.length; // append by default

                var self = this, o = this.options;
                var $li = $(o.tabTemplate.replace(/#\{href\}/g, url).replace(/#\{label\}/g, label));
                $li.addClass('ui-state-default ui-corner-top').data('destroy.tabs', true);

                var id = url.indexOf('#') == 0 ? url.replace('#', '') : this._tabId( $('a:first-child', $li)[0] );

                // try to find an existing element before creating a new one
                var $panel = $('#' + id);
                if (!$panel.length) {
                        $panel = $(o.panelTemplate).attr('id', id).data('destroy.tabs', true);
                }
                $panel.addClass('ui-tabs-panel ui-widget-content ui-corner-bottom ui-tabs-hide');
                if (index >= this.$lis.length) {
                        $li.appendTo(this.list);
                        $panel.appendTo(this.list[0].parentNode);
                }
                else {
                        $li.insertBefore(this.$lis[index]);
                        $panel.insertBefore(this.$panels[index]);
                }

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

                this._tabify();

                if (this.$tabs.length == 1) { // after tabify
                        $li.addClass('ui-tabs-selected ui-state-active');
                        $panel.removeClass('ui-tabs-hide');
                        var href = $.data(this.$tabs[0], 'load.tabs');
                        if (href) this.load(0, function() {
                                self._trigger('show', null,
                                        self.ui(self.$tabs[0], self.$panels[0]));
                        });
                }

                // callback
                this._trigger('add', null, this.ui(this.$tabs[index], this.$panels[index]));
        },

        remove: function(index) {
                var o = this.options, $li = this.$lis.eq(index).remove(),
                        $panel = this.$panels.eq(index).remove();

                // If selected tab was removed focus tab to the right or
                // in case the last tab was removed the tab to the left.
                if ($li.hasClass('ui-tabs-selected') && this.$tabs.length > 1)
                        this.select(index + (index + 1 < this.$tabs.length ? 1 : -1));

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

                this._tabify();

                // callback
                this._trigger('remove', null, this.ui($li.find('a')[0], $panel[0]));
        },

        enable: function(index) {
                var o = this.options;
                if ($.inArray(index, o.disabled) == -1)
                        return;

                this.$lis.eq(index).removeClass('ui-state-disabled');
                o.disabled = $.grep(o.disabled, function(n, i) { return n != index; });

                // callback
                this._trigger('enable', null, this.ui(this.$tabs[index], this.$panels[index]));
        },

        disable: function(index) {
                var self = this, o = this.options;
                if (index != o.selected) { // cannot disable already selected tab
                        this.$lis.eq(index).addClass('ui-state-disabled');

                        o.disabled.push(index);
                        o.disabled.sort();

                        // callback
                        this._trigger('disable', null, this.ui(this.$tabs[index], this.$panels[index]));
                }
        },

        select: function(index) {
                if (typeof index == 'string')
                        index = this.$tabs.index(this.$tabs.filter('[href$=' + index + ']'));
                this.$tabs.eq(index).trigger(this.options.event + '.tabs');
        },

        load: function(index, callback) { // callback is for internal usage only

                var self = this, o = this.options, $a = this.$tabs.eq(index), a = $a[0],
                                bypassCache = callback == undefined || callback === false, url = $a.data('load.tabs');
                                // TODO bypassCache == false should work

                callback = callback || function() {};

                // no remote or from cache - just finish with callback
                if (!url || !bypassCache && $.data(a, 'cache.tabs')) {
                        callback();
                        return;
                }

                // load remote from here on

                var inner = function(parent) {
                        var $parent = $(parent), $inner = $parent.find('*:last');
                        return $inner.length && $inner.is(':not(img)') && $inner || $parent;
                };
                var cleanup = function() {
                        self.$tabs.filter('.ui-tabs-loading').removeClass('ui-tabs-loading')
                                        .each(function() {
                                                if (o.spinner)
                                                        inner(this).parent().html(inner(this).data('label.tabs'));
                                        });
                        self.xhr = null;
                };

                if (o.spinner) {
                        var label = inner(a).html();
                        inner(a).wrapInner('<em></em>')
                                .find('em').data('label.tabs', label).html(o.spinner);
                }

                var ajaxOptions = $.extend({}, o.ajaxOptions, {
                        url: url,
                        success: function(r, s) {
                                $(self._sanitizeSelector(a.hash)).html(r);
                                cleanup();

                                if (o.cache)
                                        $.data(a, 'cache.tabs', true); // if loaded once do not load them again

                                // callbacks
                                self._trigger('load', null, self.ui(self.$tabs[index], self.$panels[index]));
                                try {
                                        o.ajaxOptions.success(r, s);
                                }
                                catch (er) {}

                                // This callback is required because the switch has to take
                                // place after loading has completed. Call last in order to
                                // fire load before show callback...
                                callback();
                        }
                });
                if (this.xhr) {
                        // terminate pending requests from other tabs and restore tab label
                        this.xhr.abort();
                        cleanup();
                }
                $a.addClass('ui-tabs-loading');
                self.xhr = $.ajax(ajaxOptions);
        },

        url: function(index, url) {
                this.$tabs.eq(index).removeData('cache.tabs').data('load.tabs', url);
        },

        ui: function(tab, panel) {
                return {
                        tab: tab,
                        panel: panel,
                        index: this.$tabs.index(tab)
                };
        }

});

$.extend($.ui.tabs, {
        version: '@VERSION',
        getter: 'length',
        defaults: {
                ajaxOptions: null,
                cache: false,
                cookie: null, // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }
                deselectable: false,
                disabled: [],
                event: 'click',
                fx: null, // e.g. { height: 'toggle', opacity: 'toggle', duration: 200 }
                idPrefix: 'ui-tabs-',
                panelTemplate: '<div></div>',
                spinner: 'Loading&#8230;',
                tabTemplate: '<li><a href="#{href}"><span>#{label}</span></a></li>'
        }
});

/*
 * Tabs Extensions
 */

/*
 * Rotate
 */
$.extend($.ui.tabs.prototype, {
        rotation: null,
        rotate: function(ms, continuing) {

                var self = this, t = this.options.selected;

                function rotate() {
                        clearTimeout(self.rotation);
                        self.rotation = setTimeout(function() {
                                t = ++t < self.$tabs.length ? t : 0;
                                self.select(t);
                        }, ms);
                }

                // start rotation
                if (ms) {
                        this.element.bind('tabsshow', rotate); // will not be attached twice
                        this.$tabs.bind(this.options.event + '.tabs', !continuing ?
                                function(e) {
                                        if (e.clientX) { // in case of a true click
                                                clearTimeout(self.rotation);
                                                self.element.unbind('tabsshow', rotate);
                                        }
                                } :
                                function(e) {
                                        t = self.options.selected;
                                        rotate();
                                }
                        );
                        rotate();
                }
                // stop rotation
                else {
                        clearTimeout(self.rotation);
                        this.element.unbind('tabsshow', rotate);
                        this.$tabs.unbind(this.options.event + '.tabs', stop);
                }
        }
});

})(jQuery);