/*
 * jQuery UI Tabs @VERSION
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Tabs
 *
 * Depends:
 *	jquery.ui.core.js
 *	jquery.ui.widget.js
 */
(function( $, undefined ) {

var tabId = 0,
	listId = 0;

function getNextTabId() {
	return ++tabId;
}

function getNextListId() {
	return ++listId;
}

$.widget( "ui.tabs", {
	options: {
		add: null,
		ajaxOptions: null,
		cache: false,
		cookie: null, // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }
		collapsible: false,
		disable: null,
		disabled: false,
		enable: null,
		event: "click",
		fx: null, // e.g. { height: 'toggle', opacity: 'toggle', duration: 200 }
		idPrefix: "ui-tabs-",
		load: null,
		panelTemplate: "<div></div>",
		remove: null,
		select: null,
		show: null,
		spinner: "<em>Loading&#8230;</em>",
		tabTemplate: "<li><a href='#{href}'><span>#{label}</span></a></li>"
	},

	_create: function() {
		this._tabify( true );
	},

	_setOption: function( key, value ) {
		if ( key == "selected" ) {
			if (this.options.collapsible && value == this.options.selected ) {
				return;
			}
			this.select( value );
		} else {
			this.options[ key ] = value;
			this._tabify();
		}
	},

	_tabId: function( a ) {
		return a.title && a.title.replace( /\s/g, "_" ).replace( /[^\w\u00c0-\uFFFF-]/g, "" ) ||
			this.options.idPrefix + getNextTabId();
	},

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

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

	_ui: function( tab, panel ) {
		return {
			tab: tab,
			panel: panel,
			index: this.anchors.index( tab )
		};
	},

	_cleanup: function() {
		// restore all former loading tabs labels
		this.lis.filter( ".ui-state-processing" )
			.removeClass( "ui-state-processing" )
			.find( "span:data(label.tabs)" )
				.each(function() {
					var el = $( this );
					el.html( el.data( "label.tabs" ) ).removeData( "label.tabs" );
				});
	},

	_tabify: function( init ) {
		var self = this,
			o = this.options,
			fragmentId = /^#.+/; // Safari 2 reports '#' for an empty hash

		this.list = this.element.find( "ol,ul" ).eq( 0 );
		this.lis = $( " > li:has(a[href])", this.list );
		this.anchors = this.lis.map(function() {
			return $( "a", this )[ 0 ];
		});
		this.panels = $( [] );

		this.anchors.each(function( i, a ) {
			var href = $( a ).attr( "href" );
			// For dynamically created HTML that contains a hash as href IE < 8 expands
			// such href to the full page url with hash and then misinterprets tab as ajax.
			// Same consideration applies for an added tab with a fragment identifier
			// since a[href=#fragment-identifier] does unexpectedly not match.
			// Thus normalize href attribute...
			var hrefBase = href.split( "#" )[ 0 ],
				baseEl;
			if ( hrefBase && ( hrefBase === location.toString().split( "#" )[ 0 ] ||
					( baseEl = $( "base" )[ 0 ]) && hrefBase === baseEl.href ) ) {
				href = a.hash;
				a.href = href;
			}

			// inline tab
			if ( fragmentId.test( href ) ) {
				self.panels = self.panels.add( self.element.find( self._sanitizeSelector( href ) ) );
			// remote tab
			// prevent loading the page itself if href is just "#"
			} else if ( href && href !== "#" ) {
				// required for restore on destroy
				$.data( a, "href.tabs", href );

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

				var id = self._tabId( a );
				a.href = "#" + id;
				var $panel = self.element.find( "#" + id );
				if ( !$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 );
			}
		});

		// initialization from scratch
		if ( init ) {
			// attach necessary classes for styling
			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.anchors.each(function( i, a ) {
						if ( a.hash == location.hash ) {
							o.selected = i;
							return false;
						}
					});
				}
				if ( typeof o.selected !== "number" && o.cookie ) {
					o.selected = parseInt( self._cookie(), 10 );
				}
				if ( typeof o.selected !== "number" && this.lis.filter( ".ui-tabs-selected" ).length ) {
					o.selected = this.lis.index( this.lis.filter( ".ui-tabs-selected" ) );
				}
				o.selected = o.selected || ( this.lis.length ? 0 : -1 );
			} else if ( o.selected === null ) { // usage of null is deprecated, TODO remove in next release
				o.selected = -1;
			}

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

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

			// highlight selected tab
			this.panels.addClass( "ui-tabs-hide" );
			this.lis.removeClass( "ui-tabs-selected ui-state-active" );
			// check for length avoids error when initializing empty list
			if ( o.selected >= 0 && this.anchors.length ) {
				self.element.find( self._sanitizeSelector( self.anchors[ o.selected ].hash ) ).removeClass( "ui-tabs-hide" );
				this.lis.eq( o.selected ).addClass( "ui-tabs-selected ui-state-active" );

				// seems to be expected behavior that the show callback is fired
				self.element.queue( "tabs", function() {
					self._trigger( "show", null,
						self._ui( self.anchors[ o.selected ], self.element.find( self._sanitizeSelector( self.anchors[ o.selected ].hash ) )[ 0 ] ) );
				});

				this.load( o.selected );
			}

			// clean up to avoid memory leaks in certain versions of IE 6
			// TODO: namespace this event
			$( window ).bind( "unload", function() {
				self.lis.add( self.anchors ).unbind( ".tabs" );
				self.lis = self.anchors = self.panels = null;
			});
		// update selected after add/remove
		} else {
			o.selected = this.lis.index( this.lis.filter( ".ui-tabs-selected" ) );
		}

		if ( !o.disabled.length ) {
			o.disabled = false;
		}

		this.element.toggleClass( "ui-tabs-collapsible", o.collapsible );

		// 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 ).toggleClass( "ui-state-disabled", $.inArray( i, o.disabled ) != -1 );
		}

		// reset cache if switching from cached to not cached
		if ( o.cache === false ) {
			this.anchors.removeData( "cache.tabs" );
		}

		// remove all handlers before, tabify may run on existing tabs after add or option change
		this.lis.add( this.anchors ).unbind( ".tabs" );

		this._focusable( this.lis );
		this._hoverable( this.lis );

		// 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 ) {
			$el.css( "display", "" );
			if ( !$.support.opacity && fx.opacity ) {
				$el[ 0 ].style.removeAttribute( "filter" );
			}
		}

		// Show a tab...
		var showTab = showFx
			? function( clicked, $show, event ) {
				$( clicked ).closest( "li" ).addClass( "ui-tabs-selected ui-state-active" );
				$show.hide().removeClass( "ui-tabs-hide" ) // avoid flicker that way
					.animate( showFx, showFx.duration || "normal", function() {
						resetStyle( $show, showFx );
						self._trigger( "show", event, self._ui( clicked, $show[ 0 ] ) );
					});
			}
			: function( clicked, $show, event ) {
				$( clicked ).closest( "li" ).addClass( "ui-tabs-selected ui-state-active" );
				$show.removeClass( "ui-tabs-hide" );
				self._trigger( "show", event, self._ui( clicked, $show[ 0 ] ) );
			};

		// Hide a tab, $show is optional...
		var hideTab = hideFx
			? function( clicked, $hide ) {
				$hide.animate( hideFx, hideFx.duration || "normal", function() {
					self.lis.removeClass( "ui-tabs-selected ui-state-active" );
					$hide.addClass( "ui-tabs-hide" );
					resetStyle( $hide, hideFx );
					self.element.dequeue( "tabs" );
				});
			}
			: function( clicked, $hide, $show ) {
				self.lis.removeClass( "ui-tabs-selected ui-state-active" );
				$hide.addClass( "ui-tabs-hide" );
				self.element.dequeue( "tabs" );
			};

		// attach tab event handler, unbind to avoid duplicates from former tabifying...
		this.anchors.bind( o.event + ".tabs", function( event ) {
			event.preventDefault();
			var el = this,
				$li = $(el).closest( "li" ),
				$hide = self.panels.filter( ":not(.ui-tabs-hide)" ),
				$show = self.element.find( self._sanitizeSelector( el.hash ) );

			// If tab is already selected and not collapsible 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-tabs-selected" ) && !o.collapsible) ||
				$li.hasClass( "ui-state-disabled" ) ||
				$li.hasClass( "ui-state-processing" ) ||
				self.panels.filter( ":animated" ).length ||
				self._trigger( "select", event, self._ui( this, $show[ 0 ] ) ) === false ) {
				this.blur();
				return;
			}

			o.selected = self.anchors.index( this );

			self.abort();

			// if tab may be closed
			if ( o.collapsible ) {
				if ( $li.hasClass( "ui-tabs-selected" ) ) {
					o.selected = -1;

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

					self.element.queue( "tabs", function() {
						hideTab( el, $hide );
					}).dequeue( "tabs" );

					this.blur();
					return;
				} else if ( !$hide.length ) {
					if ( o.cookie ) {
						self._cookie( o.selected, o.cookie );
					}

					self.element.queue( "tabs", function() {
						showTab( el, $show, event );
					});

					// TODO make passing in node possible, see also http://dev.jqueryui.com/ticket/3171
					self.load( self.anchors.index( this ) );

					this.blur();
					return;
				}
			}

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

			// show new tab
			if ( $show.length ) {
				if ( $hide.length ) {
					self.element.queue( "tabs", function() {
						hideTab( el, $hide );
					});
				}
				self.element.queue( "tabs", function() {
					showTab( el, $show, event );
				});

				self.load( self.anchors.index( this ) );
			} 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
			if ( $.browser.msie ) {
				this.blur();
			}
		});

		// disable click in any case
		this.anchors.bind( "click.tabs", function( event ){
			event.preventDefault();
		});
	},

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

		return index;
	},

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

		this.abort();

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

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

		this.anchors.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-state-disabled",
					"ui-tabs-panel",
					"ui-widget-content",
					"ui-corner-bottom",
					"ui-tabs-hide"
				].join( " " ) );
			}
		});

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

		return this;
	},

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

		var self = this,
			o = this.options,
			$li = $( o.tabTemplate.replace( /#\{href\}/g, url ).replace( /#\{label\}/g, label ) ),
			id = !url.indexOf( "#" ) ? url.replace( "#", "" ) : this._tabId( $( "a", $li )[ 0 ] );

		$li.addClass( "ui-state-default ui-corner-top" ).data( "destroy.tabs", true );

		// try to find an existing element before creating a new one
		var $panel = self.element.find( "#" + id );
		if ( !$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.anchors.length == 1 ) {
			o.selected = 0;
			$li.addClass( "ui-tabs-selected ui-state-active" );
			$panel.removeClass( "ui-tabs-hide" );
			this.element.queue( "tabs", function() {
				self._trigger( "show", null, self._ui( self.anchors[ 0 ], self.panels[ 0 ] ) );
			});

			this.load( 0 );
		}

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

	remove: function( index ) {
		index = this._getIndex( 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.anchors.length > 1) {
			this.select( index + ( index + 1 < this.anchors.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();

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

	enable: function( index ) {
		if ( index === undefined ) {
			for ( var i = 0, len = this.lis.length; i < len; i++ ) {
				this.enable( i );
			}
			return this;
		}
		index = this._getIndex( index );
		var o = this.options;
		if ( !o.disabled || ($.isArray( o.disabled ) && $.inArray( index, o.disabled ) == -1 ) ) {
			return;
		}

		this.lis.eq( index ).removeClass( "ui-state-disabled" );
		o.disabled = this.lis.map( function( i ) {
			return $(this).is( ".ui-state-disabled" ) ? i : null;
		}).get();

		if ( !o.disabled.length ) {
			o.disabled = false;
		}

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

	disable: function( index ) {
		if ( index === undefined ) {
			for ( var i = 0, len = this.lis.length; i < len; i++ ) {
				this.disable( i );
			}
			return this;
		}
		index = this._getIndex( index );
		var o = this.options;
		if ( !o.disabled || ($.isArray( o.disabled ) && $.inArray( index, o.disabled ) == -1 ) ) {
			this.lis.eq( index ).addClass( "ui-state-disabled" );

			o.disabled = this.lis.map( function( i ) {
				return $(this).is( ".ui-state-disabled" ) ? i : null;
			}).get();
			
			if ( o.disabled.length === this.anchors.length ) {
				o.disabled = true;
			}

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

		return this;
	},

	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;
			}
		}
		this.anchors.eq( index ).trigger( this.options.event + ".tabs" );
		return this;
	},

	load: function( index ) {
		index = this._getIndex( index );
		var self = this,
			o = this.options,
			a = this.anchors.eq( index )[ 0 ],
			url = $.data( a, "load.tabs" );

		this.abort();

		// not remote or from cache
		if ( !url || this.element.queue( "tabs" ).length !== 0 && $.data( a, "cache.tabs" ) ) {
			this.element.dequeue( "tabs" );
			return;
		}

		// load remote from here on
		this.lis.eq( index ).addClass( "ui-state-processing" );

		if ( o.spinner ) {
			var span = $( "span", a );
			span.data( "label.tabs", span.html() ).html( o.spinner );
		}

		this.xhr = $.ajax( $.extend( {}, o.ajaxOptions, {
			url: url,
			success: function( r, s ) {
				self.element.find( self._sanitizeSelector( a.hash ) ).html( r );

				// take care of tab labels
				self._cleanup();

				if ( o.cache ) {
					$.data( a, "cache.tabs", true );
				}

				self._trigger( "load", null, self._ui( self.anchors[ index ], self.panels[ index ] ) );
				try {
					o.ajaxOptions.success( r, s );
				}
				catch ( e ) {}
			},
			error: function( xhr, s, e ) {
				// take care of tab labels
				self._cleanup();

				self._trigger( "load", null, self._ui( self.anchors[ index ], self.panels[ index ] ) );
				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)
					o.ajaxOptions.error( xhr, s, index, a );
				}
				catch ( e ) {}
			}
		} ) );

		// last, so that load event is fired before show...
		self.element.dequeue( "tabs" );

		return this;
	},

	abort: function() {
		// stop possibly running animations
		this.element.queue( [] );
		this.panels.stop( false, true );

		// "tabs" queue must not contain more than two elements,
		// which are the callbacks for the latest clicked tab...
		this.element.queue( "tabs", this.element.queue( "tabs" ).splice( -2, 2 ) );

		// terminate pending requests from other tabs
		if ( this.xhr ) {
			this.xhr.abort();
			delete this.xhr;
		}

		// take care of tab labels
		this._cleanup();
		return this;
	},

	url: function( index, url ) {
		this.anchors.eq( index ).removeData( "cache.tabs" ).data( "load.tabs", url );
		return this;
	},

	length: function() {
		return this.anchors.length;
	}
});

$.extend( $.ui.tabs, {
	version: "@VERSION"
});

})( jQuery );