/*
 * Tabs 3 - New Wave Tabs
 *
 * Copyright (c) 2007 Klaus Hartl (stilbuero.de)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Tabs
 */

(function($) {

 // if the UI scope is not availalable, add it
 $.ui = $.ui || {};

 // tabs API methods
 $.fn.tabs = function() {
 var method = typeof arguments[0] == 'string' && arguments[0];
 var args = method && Array.prototype.slice.call(arguments, 1) || arguments;

 return this.each(function() {
 if (method) {
 var tabs = $.data(this, 'ui-tabs');
 tabs[method].apply(tabs, args);
 } else
 new $.ui.tabs(this, args[0] || {});
 });
 };

 // tabs class
 $.ui.tabs = function(el, options) {
 var self = this;

 this.element = el;

 this.options = $.extend({

// basic setup
 selected: 0,
 unselect: options.selected === null,
 event: 'click',
 disabled: [],
 cookie: null, // pass options object as expected by cookie plugin: { expires: 7, path: '/', domain: 'jquery.com', secure: true }
 // TODO bookmarkable: $.ajaxHistory ? true : false,

 // Ajax
 spinner: 'Loading…',
 cache: false,
 idPrefix: 'ui-tabs-',
 ajaxOptions: {},

 // animations
 fx: null, /* e.g. { height: 'toggle', opacity: 'toggle', duration: 200 } */

// templates
 tabTemplate: '<li><a href="#{href}"><span>#{label}</span></a></li>',
 panelTemplate: '<div></div>',

 // CSS classes
 navClass: 'ui-tabs-nav',
 selectedClass: 'ui-tabs-selected',
 unselectClass: 'ui-tabs-unselect',
 disabledClass: 'ui-tabs-disabled',
 panelClass: 'ui-tabs-panel',
 hideClass: 'ui-tabs-hide',
 loadingClass: 'ui-tabs-loading'

 }, options);

 this.options.event += '.ui-tabs'; // namespace event
 this.options.cookie = $.cookie && $.cookie.constructor == Function && this.options.cookie;

 $(el).bind('setData.ui-tabs', function(event, key, value) {
 self.options[key] = value;
 this.tabify();
 }).bind('getData.ui-tabs', function(event, key) {
 return self.options[key];
 });

 // save instance for later
 $.data(el, 'ui-tabs', this);

 // create tabs
 this.tabify(true);
 };

 // instance methods
 $.extend($.ui.tabs.prototype, {
 tabId: function(a) {
 return a.title && a.title.replace(/\s/g, '_').replace(/[^A-Za-z0-9\-_:\.]/g, '')
 || this.options.idPrefix + $.data(a);
 },
 ui: function(tab, panel) {
 return {
 instance: this,
 options: this.options,
 tab: tab,
 panel: panel
 };
 },
 tabify: function(init) {

 this.$lis = $('li:has(a[href])', this.element);
 this.$tabs = this.$lis.map(function() { return $('a', this)[0]; });
 this.$panels = $([]);

 var self = this, o = this.options;

 this.$tabs.each(function(i, a) {
 // inline tab
 if (a.hash && a.hash.replace('#', '')) // Safari 2 reports '#' for an empty hash
 self.$panels = self.$panels.add(a.hash);
 // remote tab
else if ($(a).attr('href') != '#') { // prevent loading the page itself if href is just "#"
 $.data(a, 'href.ui-tabs', a.href); // required for restore on destroy
$.data(a, 'load.ui-tabs', a.href); // mutable
 var id = self.tabId(a);
 a.href = '#' + id;
 var $panel = $('#' + id);
 if (!$panel.length) {
 $panel = $(o.panelTemplate).attr('id', id).addClass(o.panelClass)
 .insertAfter( self.$panels[i - 1] || self.element );
 $panel.data('destroy.ui-tabs', true);
 }
 self.$panels = self.$panels.add( $panel );
 }
 // invalid tab href
 else
 o.disabled.push(i + 1);
 });

 if (init) {

 // attach necessary classes for styling if not present
 $(this.element).hasClass(o.navClass) || $(this.element).addClass(o.navClass);
 this.$panels.each(function() {
 var $this = $(this);
 $this.hasClass(o.panelClass) || $this.addClass(o.panelClass);
 });

 // disabled tabs
 for (var i = 0, index; index = o.disabled[i]; i++)
 this.disable(index);

 // Try to retrieve selected tab:
 // 1. from fragment identifier in url if present
 // 2. from cookie
 // 3. from selected class attribute on <li>
 // 4. otherwise use given "selected" option
 // 5. check if tab is disabled
 this.$tabs.each(function(i, a) {
 if (location.hash) {
 if (a.hash == location.hash) {
 o.selected = i;
 // prevent page scroll to fragment
 //if (($.browser.msie || $.browser.opera) && !o.remote) {
 if ($.browser.msie || $.browser.opera) {
 var $toShow = $(location.hash), toShowId = $toShow.attr('id');
 $toShow.attr('id', '');
 setTimeout(function() {
 $toShow.attr('id', toShowId); // restore id
 }, 500);
 }
 scrollTo(0, 0);
 return false; // break
 }
 } else if (o.cookie) {
 var index = parseInt($.cookie('ui-tabs' + $.data(self.element)),10);
 if (index && self.$tabs[index]) {
 o.selected = index;
 return false; // break
 }
 } else if ( self.$lis.eq(i).hasClass(o.selectedClass) ) {
 o.selected = i;
 return false; // break
 }
 });
 var n = this.$lis.length;
 while (this.$lis.eq(o.selected).hasClass(o.disabledClass) && n) {
 o.selected = ++o.selected < this.$lis.length ? o.selected : 0;
 n--;
 }
 if (!n) // all tabs disabled, set option unselect to true
 o.unselect = true;

 // highlight selected tab
 this.$panels.addClass(o.hideClass);
 this.$lis.removeClass(o.selectedClass);
 if (!o.unselect) {
 this.$panels.eq(o.selected).show().removeClass(o.hideClass); // use show and remove class to show in any case no matter how it has been hidden before
 this.$lis.eq(o.selected).addClass(o.selectedClass);
 }

 // load if remote tab
 var href = !o.unselect && $.data(this.$tabs[o.selected], 'load.ui-tabs');
 if (href)
 this.load(o.selected, href);

 // disable click if event is configured to something else
 if (!(/^click/).test(o.event))
 this.$tabs.bind('click', function(e) { e.preventDefault(); });

 }

 var hideFx, showFx, baseFx = { 'min-width': 0, duration: 1 }, baseDuration = 'normal';
 if (o.fx && o.fx.constructor == Array)
 hideFx = o.fx[0] || baseFx, showFx = o.fx[1] || baseFx;
 else
 hideFx = showFx = o.fx || baseFx;

 // reset some styles to maintain print style sheets etc.
 var resetCSS = { display: '', overflow: '', height: '' };
 if (!$.browser.msie) // not in IE to prevent ClearType font issue
 resetCSS.opacity = '';

 // Hide a tab, animation prevents browser scrolling to fragment,
 // $show is optional.
 function hideTab(clicked, $hide, $show) {
 $hide.animate(hideFx, hideFx.duration || baseDuration, function() { //
 $hide.addClass(o.hideClass).css(resetCSS); // maintain flexible height and accessibility in print etc.
 if ($.browser.msie && hideFx.opacity)
 $hide[0].style.filter = '';
 if ($show)
 showTab(clicked, $show, $hide);
 });
 }

 // Show a tab, animation prevents browser scrolling to fragment,
 // $hide is optional.
 function showTab(clicked, $show, $hide) {
 if (showFx === baseFx)
 $show.css('display', 'block'); // prevent occasionally occuring flicker in Firefox cause by gap between showing and hiding the tab panels
 $show.animate(showFx, showFx.duration || baseDuration, function() {
 $show.removeClass(o.hideClass).css(resetCSS); // maintain flexible height and accessibility in print etc.
 if ($.browser.msie && showFx.opacity)
 $show[0].style.filter = '';

 // callback
$(self.element).triggerHandler("show.ui-tabs", [self.ui(clicked, $show[0])]);

 });
 }

 // switch a tab
 function switchTab(clicked, $li, $hide, $show) {
 /*if (o.bookmarkable && trueClick) { // add to history only if true click occured, not a triggered click
$.ajaxHistory.update(clicked.hash);
 }*/
 $li.addClass(o.selectedClass)
 .siblings().removeClass(o.selectedClass);
 hideTab(clicked, $hide, $show);
 }

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

 //var trueClick = e.clientX; // add to history only if true click occured, not a triggered click
 var $li = $(this).parents('li:eq(0)'),
 $hide = self.$panels.filter(':visible'),
 $show = $(this.hash);

 // If tab is already selected and not unselectable or tab disabled or click callback returns false stop here.
 // Check if click handler returns false last so that it is not executed for a disabled tab!
 if (($li.hasClass(o.selectedClass) && !o.unselect) || $li.hasClass(o.disabledClass)
 || $(self.element).triggerHandler("select.ui-tabs", [self.ui(this, $show[0])]) === false) {
 this.blur();
 return false;
 }

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

 // if tab may be closed
 if (o.unselect) {
 if ($li.hasClass(o.selectedClass)) {
 self.options.selected = null;
 $li.removeClass(o.selectedClass);
 self.$panels.stop();
 hideTab(this, $hide);
 this.blur();
 return false;
 } else if (!$hide.length) {
 self.$panels.stop();
 var a = this;
 self.load(self.$tabs.index(this), function() {
 $li.addClass(o.selectedClass).addClass(o.unselectClass);
 showTab(a, $show);
 });
 this.blur();
 return false;
 }
 }

 if (o.cookie)
 $.cookie('ui-tabs' + $.data(self.element), self.options.selected, o.cookie);

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

 // show new tab
 if ($show.length) {

 // prevent scrollbar scrolling to 0 and than back in IE7, happens only if bookmarking/history is enabled
 /*if ($.browser.msie && o.bookmarkable) {
 var showId = this.hash.replace('#', '');
 $show.attr('id', '');
 setTimeout(function() {
 $show.attr('id', showId); // restore id
 }, 0);
 }*/

 var a = this;
 self.load(self.$tabs.index(this), function() {
 switchTab(a, $li, $hide, $show);
 });

 // Set scrollbar to saved position - need to use timeout with 0 to prevent browser scroll to target of hash
 /*var scrollX = window.pageXOffset || document.documentElement && document.documentElement.scrollLeft || document.body.scrollLeft || 0;
 var scrollY = window.pageYOffset || document.documentElement && document.documentElement.scrollTop || document.body.scrollTop || 0;
 setTimeout(function() {
 scrollTo(scrollX, scrollY);
 }, 0);*/

 } 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 in modern
 // browsers via CSS, also blur removes focus from address bar in Firefox
 // which can become a usability and annoying problem with tabsRotate.
 if ($.browser.msie)
 this.blur();

 //return o.bookmarkable && !!trueClick; // convert trueClick == undefined to Boolean required in IE
 return false;

 });

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

 var o = this.options;
 var $li = $(o.tabTemplate.replace(/#\{href\}/, url).replace(/#\{label\}/, label));
 $li.data('destroy.ui-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)
 .addClass(o.panelClass).addClass(o.hideClass);
 $panel.data('destroy.ui-tabs', true);
 }
 if (index >= this.$lis.length) {
 $li.appendTo(this.element);
 $panel.appendTo(this.element.parentNode);
 } else {
 $li.insertBefore(this.$lis[index]);
 $panel.insertBefore(this.$panels[index]);
 }

 this.tabify();

 if (this.$tabs.length == 1) {
 $li.addClass(o.selectedClass);
 $panel.removeClass(o.hideClass);
 var href = $.data(this.$tabs[0], 'load.ui-tabs');
 if (href)
 this.load(index, href);
 }

 // callback
 $(this.element).triggerHandler("add.ui-tabs",
 [this.ui(this.$tabs[index], this.$panels[index])]
 );

 } else
 throw 'jQuery UI Tabs: Not enough arguments to add tab.';
 },
 remove: function(index) {
 if (index && index.constructor == Number) {
 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
 // tab to the left if last tab was removed.
 if ($li.hasClass(o.selectedClass) && this.$tabs.length > 1)
 this.click(index + (index < this.$tabs.length ? 1 : -1));
 this.tabify();

 // callback
 $(this.element).triggerHandler("remove.ui-tabs",
 [this.ui($li.find('a')[0], $panel[0])]
 );

 }
 },
 enable: function(index) {
 var self = this, o = this.options, $li = this.$lis.eq(index);
 $li.removeClass(o.disabledClass);
 if ($.browser.safari) { // fix disappearing tab (that used opacity indicating disabling) after enabling in Safari 2...
 $li.css('display', 'inline-block');
 setTimeout(function() {
 $li.css('display', 'block');
 }, 0);
 }

 o.disabled = $.map(this.$lis.filter('.' + o.disabledClass),
 function(n, i) { return self.$lis.index(n); } );

 // callback
 $(this.element).triggerHandler("enable.ui-tabs",
 [this.ui(this.$tabs[index], this.$panels[index])]
 );

 },
 disable: function(index) {
 var self = this, o = this.options;
 this.$lis.eq(index).addClass(o.disabledClass);

 o.disabled = $.map(this.$lis.filter('.' + o.disabledClass),
 function(n, i) { return self.$lis.index(n); } );

 // callback
 $(this.element).triggerHandler("disable.ui-tabs",
 [this.ui(this.$tabs[index], this.$panels[index])]
 );

 },
 select: function(index) {
 if (typeof index == 'string')
 index = this.$tabs.index( this.$tabs.filter('[href$=' + index + ']')[0] );
 this.$tabs.eq(index).trigger(this.options.event);
 },
 load: function(index, callback) { // callback is for internal usage only
 var self = this, o = this.options,
 $a = this.$tabs.eq(index), a = $a[0];

 var url = $a.data('load.ui-tabs');

 // no remote - just finish with callback
 if (!url) {
 typeof callback == 'function' && callback();
 return;
 }

 // load remote from here on
 if (o.spinner) {
 var $span = $('span', a), label = $span.html();
 $span.html('<em>' + o.spinner + '</em>');
 }
 var finish = function() {
 self.$tabs.filter('.' + o.loadingClass).each(function() {
 $(this).removeClass(o.loadingClass);
 if (o.spinner)
 $('span', this).html(label);
 });
 self.xhr = null;
 };
 var ajaxOptions = $.extend({}, o.ajaxOptions, {
 url: url,
 success: function(r, s) {
 $(a.hash).html(r);
 finish();
 // This callback is required because the switch has to take
 // place after loading has completed.
 typeof callback == 'function' && callback();

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

 // callback
 $(self.element).triggerHandler("load.ui-tabs",
 [self.ui(self.$tabs[index], self.$panels[index])]
 );

 o.ajaxOptions.success && o.ajaxOptions.success(r, s);
 }
 });
 if (this.xhr) {
 // terminate pending requests from other tabs and restore tab label
 this.xhr.abort();
 finish();
 }
 $a.addClass(o.loadingClass);
 setTimeout(function() { // timeout is again required in IE, "wait" for id being restored
 self.xhr = $.ajax(ajaxOptions);
 }, 0);

 },
 url: function(index, url) {
 this.$tabs.eq(index).data('load.ui-tabs', url);
 },
 destroy: function() {
 var o = this.options;
 $(this.element).unbind('.ui-tabs')
 .removeClass(o.navClass).removeData('ui-tabs');
 this.$tabs.each(function() {
 var href = $.data(this, 'href.ui-tabs');
 if (href)
 this.href = href;
 $(this).unbind('.ui-tabs')
 .removeData('href.ui-tabs').removeData('load.ui-tabs');
 });
 this.$lis.add(this.$panels).each(function() {
 if ($.data(this, 'destroy.ui-tabs'))
 $(this).remove();
 else
 $(this).removeClass([o.selectedClass, o.unselectClass,
 o.disabledClass, o.panelClass, o.hideClass].join(' '));
 });
 }
 });

})(jQuery);