Proyectos de Subversion Moodle

/*! jQuery UI - v1.13.2 - 2022-07-14

* http://jqueryui.com

* Includes: widget.js, position.js, data.js, disable-selection.js, effect.js, effects/effect-blind.js, effects/effect-bounce.js, effects/effect-clip.js, effects/effect-drop.js, effects/effect-explode.js, effects/effect-fade.js, effects/effect-fold.js, effects/effect-highlight.js, effects/effect-puff.js, effects/effect-pulsate.js, effects/effect-scale.js, effects/effect-shake.js, effects/effect-size.js, effects/effect-slide.js, effects/effect-transfer.js, focusable.js, form-reset-mixin.js, jquery-patch.js, keycode.js, labels.js, scroll-parent.js, tabbable.js, unique-id.js, widgets/accordion.js, widgets/autocomplete.js, widgets/button.js, widgets/checkboxradio.js, widgets/controlgroup.js, widgets/datepicker.js, widgets/dialog.js, widgets/draggable.js, widgets/droppable.js, widgets/menu.js, widgets/mouse.js, widgets/progressbar.js, widgets/resizable.js, widgets/selectable.js, widgets/selectmenu.js, widgets/slider.js, widgets/sortable.js, widgets/spinner.js, widgets/tabs.js, widgets/tooltip.js

* Copyright jQuery Foundation and other contributors; Licensed MIT */

( function( factory ) {

	"use strict";

	if ( typeof define === "function" && define.amd ) {

		// AMD. Register as an anonymous module.

		define( [ "jquery" ], factory );

	} else {

		// Browser globals

		factory( jQuery );

	}

} )( function( $ ) {

"use strict";

$.ui = $.ui || {};

var version = $.ui.version = "1.13.2";

/*!

 * jQuery UI Widget 1.13.2

 * http://jqueryui.com

 *

 * Copyright jQuery Foundation and other contributors

 * Released under the MIT license.

 * http://jquery.org/license

 */

//>>label: Widget

//>>group: Core

//>>description: Provides a factory for creating stateful widgets with a common API.

//>>docs: http://api.jqueryui.com/jQuery.widget/

//>>demos: http://jqueryui.com/widget/

var widgetUuid = 0;

var widgetHasOwnProperty = Array.prototype.hasOwnProperty;

var widgetSlice = Array.prototype.slice;

$.cleanData = ( function( orig ) {

	return function( elems ) {

		var events, elem, i;

		for ( i = 0; ( elem = elems[ i ] ) != null; i++ ) {

			// Only trigger remove when necessary to save time

			events = $._data( elem, "events" );

			if ( events && events.remove ) {

				$( elem ).triggerHandler( "remove" );

			}

		}

		orig( elems );

	};

} )( $.cleanData );

$.widget = function( name, base, prototype ) {

	var existingConstructor, constructor, basePrototype;

	// ProxiedPrototype allows the provided prototype to remain unmodified

	// so that it can be used as a mixin for multiple widgets (#8876)

	var proxiedPrototype = {};

	var namespace = name.split( "." )[ 0 ];

	name = name.split( "." )[ 1 ];

	var fullName = namespace + "-" + name;

	if ( !prototype ) {

		prototype = base;

		base = $.Widget;

	}

	if ( Array.isArray( prototype ) ) {

		prototype = $.extend.apply( null, [ {} ].concat( prototype ) );

	}

	// Create selector for plugin

	$.expr.pseudos[ fullName.toLowerCase() ] = function( elem ) {

		return !!$.data( elem, fullName );

	};

	$[ namespace ] = $[ namespace ] || {};

	existingConstructor = $[ namespace ][ name ];

	constructor = $[ namespace ][ name ] = function( options, element ) {

		// Allow instantiation without "new" keyword

		if ( !this || !this._createWidget ) {

			return new constructor( options, element );

		}

		// Allow instantiation without initializing for simple inheritance

		// must use "new" keyword (the code above always passes args)

		if ( arguments.length ) {

			this._createWidget( options, element );

		}

	};

	// Extend with the existing constructor to carry over any static properties

	$.extend( constructor, existingConstructor, {

		version: prototype.version,

		// Copy the object used to create the prototype in case we need to

		// redefine the widget later

		_proto: $.extend( {}, prototype ),

		// Track widgets that inherit from this widget in case this widget is

		// redefined after a widget inherits from it

		_childConstructors: []

	} );

	basePrototype = new base();

	// We need to make the options hash a property directly on the new instance

	// otherwise we'll modify the options hash on the prototype that we're

	// inheriting from

	basePrototype.options = $.widget.extend( {}, basePrototype.options );

	$.each( prototype, function( prop, value ) {

		if ( typeof value !== "function" ) {

			proxiedPrototype[ prop ] = value;

			return;

		}

		proxiedPrototype[ prop ] = ( function() {

			function _super() {

				return base.prototype[ prop ].apply( this, arguments );

			}

			function _superApply( args ) {

				return base.prototype[ prop ].apply( this, args );

			}

			return function() {

				var __super = this._super;

				var __superApply = this._superApply;

				var returnValue;

				this._super = _super;

				this._superApply = _superApply;

				returnValue = value.apply( this, arguments );

				this._super = __super;

				this._superApply = __superApply;

				return returnValue;

			};

		} )();

	} );

	constructor.prototype = $.widget.extend( basePrototype, {

		// TODO: remove support for widgetEventPrefix

		// always use the name + a colon as the prefix, e.g., draggable:start

		// don't prefix for widgets that aren't DOM-based

		widgetEventPrefix: existingConstructor ? ( basePrototype.widgetEventPrefix || name ) : name

	}, proxiedPrototype, {

		constructor: constructor,

		namespace: namespace,

		widgetName: name,

		widgetFullName: fullName

	} );

	// If this widget is being redefined then we need to find all widgets that

	// are inheriting from it and redefine all of them so that they inherit from

	// the new version of this widget. We're essentially trying to replace one

	// level in the prototype chain.

	if ( existingConstructor ) {

		$.each( existingConstructor._childConstructors, function( i, child ) {

			var childPrototype = child.prototype;

			// Redefine the child widget using the same prototype that was

			// originally used, but inherit from the new version of the base

			$.widget( childPrototype.namespace + "." + childPrototype.widgetName, constructor,

				child._proto );

		} );

		// Remove the list of existing child constructors from the old constructor

		// so the old child constructors can be garbage collected

		delete existingConstructor._childConstructors;

	} else {

		base._childConstructors.push( constructor );

	}

	$.widget.bridge( name, constructor );

	return constructor;

};

$.widget.extend = function( target ) {

	var input = widgetSlice.call( arguments, 1 );

	var inputIndex = 0;

	var inputLength = input.length;

	var key;

	var value;

	for ( ; inputIndex < inputLength; inputIndex++ ) {

		for ( key in input[ inputIndex ] ) {

			value = input[ inputIndex ][ key ];

			if ( widgetHasOwnProperty.call( input[ inputIndex ], key ) && value !== undefined ) {

				// Clone objects

				if ( $.isPlainObject( value ) ) {

					target[ key ] = $.isPlainObject( target[ key ] ) ?

						$.widget.extend( {}, target[ key ], value ) :

						// Don't extend strings, arrays, etc. with objects

						$.widget.extend( {}, value );

				// Copy everything else by reference

				} else {

					target[ key ] = value;

				}

			}

		}

	}

	return target;

};

$.widget.bridge = function( name, object ) {

	var fullName = object.prototype.widgetFullName || name;

	$.fn[ name ] = function( options ) {

		var isMethodCall = typeof options === "string";

		var args = widgetSlice.call( arguments, 1 );

		var returnValue = this;

		if ( isMethodCall ) {

			// If this is an empty collection, we need to have the instance method

			// return undefined instead of the jQuery instance

			if ( !this.length && options === "instance" ) {

				returnValue = undefined;

			} else {

				this.each( function() {

					var methodValue;

					var instance = $.data( this, fullName );

					if ( options === "instance" ) {

						returnValue = instance;

						return false;

					}

					if ( !instance ) {

						return $.error( "cannot call methods on " + name +

							" prior to initialization; " +

							"attempted to call method '" + options + "'" );

					}

					if ( typeof instance[ options ] !== "function" ||

						options.charAt( 0 ) === "_" ) {

						return $.error( "no such method '" + options + "' for " + name +

							" widget instance" );

					}

					methodValue = instance[ options ].apply( instance, args );

					if ( methodValue !== instance && methodValue !== undefined ) {

						returnValue = methodValue && methodValue.jquery ?

							returnValue.pushStack( methodValue.get() ) :

							methodValue;

						return false;

					}

				} );

			}

		} else {

			// Allow multiple hashes to be passed on init

			if ( args.length ) {

				options = $.widget.extend.apply( null, [ options ].concat( args ) );

			}

			this.each( function() {

				var instance = $.data( this, fullName );

				if ( instance ) {

					instance.option( options || {} );

					if ( instance._init ) {

						instance._init();

					}

				} else {

					$.data( this, fullName, new object( options, this ) );

				}

			} );

		}

		return returnValue;

	};

};

$.Widget = function( /* options, element */ ) {};

$.Widget._childConstructors = [];

$.Widget.prototype = {

	widgetName: "widget",

	widgetEventPrefix: "",

	defaultElement: "<div>",

	options: {

		classes: {},

		disabled: false,

		// Callbacks

		create: null

	},

	_createWidget: function( options, element ) {

		element = $( element || this.defaultElement || this )[ 0 ];

		this.element = $( element );

		this.uuid = widgetUuid++;

		this.eventNamespace = "." + this.widgetName + this.uuid;

		this.bindings = $();

		this.hoverable = $();

		this.focusable = $();

		this.classesElementLookup = {};

		if ( element !== this ) {

			$.data( element, this.widgetFullName, this );

			this._on( true, this.element, {

				remove: function( event ) {

					if ( event.target === element ) {

						this.destroy();

					}

				}

			} );

			this.document = $( element.style ?

				// Element within the document

				element.ownerDocument :

				// Element is window or document

				element.document || element );

			this.window = $( this.document[ 0 ].defaultView || this.document[ 0 ].parentWindow );

		}

		this.options = $.widget.extend( {},

			this.options,

			this._getCreateOptions(),

			options );

		this._create();

		if ( this.options.disabled ) {

			this._setOptionDisabled( this.options.disabled );

		}

		this._trigger( "create", null, this._getCreateEventData() );

		this._init();

	},

	_getCreateOptions: function() {

		return {};

	},

	_getCreateEventData: $.noop,

	_create: $.noop,

	_init: $.noop,

	destroy: function() {

		var that = this;

		this._destroy();

		$.each( this.classesElementLookup, function( key, value ) {

			that._removeClass( value, key );

		} );

		// We can probably remove the unbind calls in 2.0

		// all event bindings should go through this._on()

		this.element

			.off( this.eventNamespace )

			.removeData( this.widgetFullName );

		this.widget()

			.off( this.eventNamespace )

			.removeAttr( "aria-disabled" );

		// Clean up events and states

		this.bindings.off( this.eventNamespace );

	},

	_destroy: $.noop,

	widget: function() {

		return this.element;

	},

	option: function( key, value ) {

		var options = key;

		var parts;

		var curOption;

		var i;

		if ( arguments.length === 0 ) {

			// Don't return a reference to the internal hash

			return $.widget.extend( {}, this.options );

		}

		if ( typeof key === "string" ) {

			// Handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }

			options = {};

			parts = key.split( "." );

			key = parts.shift();

			if ( parts.length ) {

				curOption = options[ key ] = $.widget.extend( {}, this.options[ key ] );

				for ( i = 0; i < parts.length - 1; i++ ) {

					curOption[ parts[ i ] ] = curOption[ parts[ i ] ] || {};

					curOption = curOption[ parts[ i ] ];

				}

				key = parts.pop();

				if ( arguments.length === 1 ) {

					return curOption[ key ] === undefined ? null : curOption[ key ];

				}

				curOption[ key ] = value;

			} else {

				if ( arguments.length === 1 ) {

					return this.options[ key ] === undefined ? null : this.options[ key ];

				}

				options[ key ] = value;

			}

		}

		this._setOptions( options );

		return this;

	},

	_setOptions: function( options ) {

		var key;

		for ( key in options ) {

			this._setOption( key, options[ key ] );

		}

		return this;

	},

	_setOption: function( key, value ) {

		if ( key === "classes" ) {

			this._setOptionClasses( value );

		}

		this.options[ key ] = value;

		if ( key === "disabled" ) {

			this._setOptionDisabled( value );

		}

		return this;

	},

	_setOptionClasses: function( value ) {

		var classKey, elements, currentElements;

		for ( classKey in value ) {

			currentElements = this.classesElementLookup[ classKey ];

			if ( value[ classKey ] === this.options.classes[ classKey ] ||

					!currentElements ||

					!currentElements.length ) {

				continue;

			}

			// We are doing this to create a new jQuery object because the _removeClass() call

			// on the next line is going to destroy the reference to the current elements being

			// tracked. We need to save a copy of this collection so that we can add the new classes

			// below.

			elements = $( currentElements.get() );

			this._removeClass( currentElements, classKey );

			// We don't use _addClass() here, because that uses this.options.classes

			// for generating the string of classes. We want to use the value passed in from

			// _setOption(), this is the new value of the classes option which was passed to

			// _setOption(). We pass this value directly to _classes().

			elements.addClass( this._classes( {

				element: elements,

				keys: classKey,

				classes: value,

				add: true

			} ) );

		}

	},

	_setOptionDisabled: function( value ) {

		this._toggleClass( this.widget(), this.widgetFullName + "-disabled", null, !!value );

		// If the widget is becoming disabled, then nothing is interactive

		if ( value ) {

			this._removeClass( this.hoverable, null, "ui-state-hover" );

			this._removeClass( this.focusable, null, "ui-state-focus" );

		}

	},

	enable: function() {

		return this._setOptions( { disabled: false } );

	},

	disable: function() {

		return this._setOptions( { disabled: true } );

	},

	_classes: function( options ) {

		var full = [];

		var that = this;

		options = $.extend( {

			element: this.element,

			classes: this.options.classes || {}

		}, options );

		function bindRemoveEvent() {

			var nodesToBind = [];

			options.element.each( function( _, element ) {

				var isTracked = $.map( that.classesElementLookup, function( elements ) {

					return elements;

				} )

					.some( function( elements ) {

						return elements.is( element );

					} );

				if ( !isTracked ) {

					nodesToBind.push( element );

				}

			} );

			that._on( $( nodesToBind ), {

				remove: "_untrackClassesElement"

			} );

		}

		function processClassString( classes, checkOption ) {

			var current, i;

			for ( i = 0; i < classes.length; i++ ) {

				current = that.classesElementLookup[ classes[ i ] ] || $();

				if ( options.add ) {

					bindRemoveEvent();

					current = $( $.uniqueSort( current.get().concat( options.element.get() ) ) );

				} else {

					current = $( current.not( options.element ).get() );

				}

				that.classesElementLookup[ classes[ i ] ] = current;

				full.push( classes[ i ] );

				if ( checkOption && options.classes[ classes[ i ] ] ) {

					full.push( options.classes[ classes[ i ] ] );

				}

			}

		}

		if ( options.keys ) {

			processClassString( options.keys.match( /\S+/g ) || [], true );

		}

		if ( options.extra ) {

			processClassString( options.extra.match( /\S+/g ) || [] );

		}

		return full.join( " " );

	},

	_untrackClassesElement: function( event ) {

		var that = this;

		$.each( that.classesElementLookup, function( key, value ) {

			if ( $.inArray( event.target, value ) !== -1 ) {

				that.classesElementLookup[ key ] = $( value.not( event.target ).get() );

			}

		} );

		this._off( $( event.target ) );

	},

	_removeClass: function( element, keys, extra ) {

		return this._toggleClass( element, keys, extra, false );

	},

	_addClass: function( element, keys, extra ) {

		return this._toggleClass( element, keys, extra, true );

	},

	_toggleClass: function( element, keys, extra, add ) {

		add = ( typeof add === "boolean" ) ? add : extra;

		var shift = ( typeof element === "string" || element === null ),

			options = {

				extra: shift ? keys : extra,

				keys: shift ? element : keys,

				element: shift ? this.element : element,

				add: add

			};

		options.element.toggleClass( this._classes( options ), add );

		return this;

	},

	_on: function( suppressDisabledCheck, element, handlers ) {

		var delegateElement;

		var instance = this;

		// No suppressDisabledCheck flag, shuffle arguments

		if ( typeof suppressDisabledCheck !== "boolean" ) {

			handlers = element;

			element = suppressDisabledCheck;

			suppressDisabledCheck = false;

		}

		// No element argument, shuffle and use this.element

		if ( !handlers ) {

			handlers = element;

			element = this.element;

			delegateElement = this.widget();

		} else {

			element = delegateElement = $( element );

			this.bindings = this.bindings.add( element );

		}

		$.each( handlers, function( event, handler ) {

			function handlerProxy() {

				// Allow widgets to customize the disabled handling

				// - disabled as an array instead of boolean

				// - disabled class as method for disabling individual parts

				if ( !suppressDisabledCheck &&

						( instance.options.disabled === true ||

						$( this ).hasClass( "ui-state-disabled" ) ) ) {

					return;

				}

				return ( typeof handler === "string" ? instance[ handler ] : handler )

					.apply( instance, arguments );

			}

			// Copy the guid so direct unbinding works

			if ( typeof handler !== "string" ) {

				handlerProxy.guid = handler.guid =

					handler.guid || handlerProxy.guid || $.guid++;

			}

			var match = event.match( /^([\w:-]*)\s*(.*)$/ );

			var eventName = match[ 1 ] + instance.eventNamespace;

			var selector = match[ 2 ];

			if ( selector ) {

				delegateElement.on( eventName, selector, handlerProxy );

			} else {

				element.on( eventName, handlerProxy );

			}

		} );

	},

	_off: function( element, eventName ) {

		eventName = ( eventName || "" ).split( " " ).join( this.eventNamespace + " " ) +

			this.eventNamespace;

		element.off( eventName );

		// Clear the stack to avoid memory leaks (#10056)

		this.bindings = $( this.bindings.not( element ).get() );

		this.focusable = $( this.focusable.not( element ).get() );

		this.hoverable = $( this.hoverable.not( element ).get() );

	},

	_delay: function( handler, delay ) {

		function handlerProxy() {

			return ( typeof handler === "string" ? instance[ handler ] : handler )

				.apply( instance, arguments );

		}

		var instance = this;

		return setTimeout( handlerProxy, delay || 0 );

	},

	_hoverable: function( element ) {

		this.hoverable = this.hoverable.add( element );

		this._on( element, {

			mouseenter: function( event ) {

				this._addClass( $( event.currentTarget ), null, "ui-state-hover" );

			},

			mouseleave: function( event ) {

				this._removeClass( $( event.currentTarget ), null, "ui-state-hover" );

			}

		} );

	},

	_focusable: function( element ) {

		this.focusable = this.focusable.add( element );

		this._on( element, {

			focusin: function( event ) {

				this._addClass( $( event.currentTarget ), null, "ui-state-focus" );

			},

			focusout: function( event ) {

				this._removeClass( $( event.currentTarget ), null, "ui-state-focus" );

			}

		} );

	},

	_trigger: function( type, event, data ) {

		var prop, orig;

		var callback = this.options[ type ];

		data = data || {};

		event = $.Event( event );

		event.type = ( type === this.widgetEventPrefix ?

			type :

			this.widgetEventPrefix + type ).toLowerCase();

		// The original event may come from any element

		// so we need to reset the target on the new event

		event.target = this.element[ 0 ];

		// Copy original event properties over to the new event

		orig = event.originalEvent;

		if ( orig ) {

			for ( prop in orig ) {

				if ( !( prop in event ) ) {

					event[ prop ] = orig[ prop ];

				}

			}

		}

		this.element.trigger( event, data );

		return !( typeof callback === "function" &&

			callback.apply( this.element[ 0 ], [ event ].concat( data ) ) === false ||

			event.isDefaultPrevented() );

	}

};

$.each( { show: "fadeIn", hide: "fadeOut" }, function( method, defaultEffect ) {

	$.Widget.prototype[ "_" + method ] = function( element, options, callback ) {

		if ( typeof options === "string" ) {

			options = { effect: options };

		}

		var hasOptions;

		var effectName = !options ?

			method :

			options === true || typeof options === "number" ?

				defaultEffect :

				options.effect || defaultEffect;

		options = options || {};

		if ( typeof options === "number" ) {

			options = { duration: options };

		} else if ( options === true ) {

			options = {};

		}

		hasOptions = !$.isEmptyObject( options );

		options.complete = callback;

		if ( options.delay ) {

			element.delay( options.delay );

		}

		if ( hasOptions && $.effects && $.effects.effect[ effectName ] ) {

			element[ method ]( options );

		} else if ( effectName !== method && element[ effectName ] ) {

			element[ effectName ]( options.duration, options.easing, callback );

		} else {

			element.queue( function( next ) {

				$( this )[ method ]();

				if ( callback ) {

					callback.call( element[ 0 ] );

				}

				next();

			} );

		}

	};

} );

var widget = $.widget;

/*!

 * jQuery UI Position 1.13.2

 * http://jqueryui.com

 *

 * Copyright jQuery Foundation and other contributors

 * Released under the MIT license.

 * http://jquery.org/license

 *

 * http://api.jqueryui.com/position/

 */

//>>label: Position

//>>group: Core

//>>description: Positions elements relative to other elements.

//>>docs: http://api.jqueryui.com/position/

//>>demos: http://jqueryui.com/position/

( function() {

var cachedScrollbarWidth,

	max = Math.max,

	abs = Math.abs,

	rhorizontal = /left|center|right/,

	rvertical = /top|center|bottom/,

	roffset = /[\+\-]\d+(\.[\d]+)?%?/,

	rposition = /^\w+/,

	rpercent = /%$/,

	_position = $.fn.position;

function getOffsets( offsets, width, height ) {

	return [

		parseFloat( offsets[ 0 ] ) * ( rpercent.test( offsets[ 0 ] ) ? width / 100 : 1 ),

		parseFloat( offsets[ 1 ] ) * ( rpercent.test( offsets[ 1 ] ) ? height / 100 : 1 )

	];

}

function parseCss( element, property ) {

	return parseInt( $.css( element, property ), 10 ) || 0;

}

function isWindow( obj ) {

	return obj != null && obj === obj.window;

}

function getDimensions( elem ) {

	var raw = elem[ 0 ];

	if ( raw.nodeType === 9 ) {

		return {

			width: elem.width(),

			height: elem.height(),

			offset: { top: 0, left: 0 }

		};

	}

	if ( isWindow( raw ) ) {

		return {

			width: elem.width(),

			height: elem.height(),

			offset: { top: elem.scrollTop(), left: elem.scrollLeft() }

		};

	}

	if ( raw.preventDefault ) {

		return {

			width: 0,

			height: 0,

			offset: { top: raw.pageY, left: raw.pageX }

		};

	}

	return {

		width: elem.outerWidth(),

		height: elem.outerHeight(),

		offset: elem.offset()

	};

}

$.position = {

	scrollbarWidth: function() {

		if ( cachedScrollbarWidth !== undefined ) {

			return cachedScrollbarWidth;

		}

		var w1, w2,

			div = $( "<div style=" +

				"'display:block;position:absolute;width:200px;height:200px;overflow:hidden;'>" +

				"<div style='height:300px;width:auto;'></div></div>" ),

			innerDiv = div.children()[ 0 ];

		$( "body" ).append( div );

		w1 = innerDiv.offsetWidth;

		div.css( "overflow", "scroll" );

		w2 = innerDiv.offsetWidth;

		if ( w1 === w2 ) {

			w2 = div[ 0 ].clientWidth;

		}

		div.remove();

		return ( cachedScrollbarWidth = w1 - w2 );

	},

	getScrollInfo: function( within ) {

		var overflowX = within.isWindow || within.isDocument ? "" :

				within.element.css( "overflow-x" ),

			overflowY = within.isWindow || within.isDocument ? "" :

				within.element.css( "overflow-y" ),

			hasOverflowX = overflowX === "scroll" ||

				( overflowX === "auto" && within.width < within.element[ 0 ].scrollWidth ),

			hasOverflowY = overflowY === "scroll" ||

				( overflowY === "auto" && within.height < within.element[ 0 ].scrollHeight );

		return {

			width: hasOverflowY ? $.position.scrollbarWidth() : 0,

			height: hasOverflowX ? $.position.scrollbarWidth() : 0

		};

	},

	getWithinInfo: function( element ) {

		var withinElement = $( element || window ),

			isElemWindow = isWindow( withinElement[ 0 ] ),

			isDocument = !!withinElement[ 0 ] && withinElement[ 0 ].nodeType === 9,

			hasOffset = !isElemWindow && !isDocument;

		return {

			element: withinElement,

			isWindow: isElemWindow,

			isDocument: isDocument,

			offset: hasOffset ? $( element ).offset() : { left: 0, top: 0 },

			scrollLeft: withinElement.scrollLeft(),

			scrollTop: withinElement.scrollTop(),

			width: withinElement.outerWidth(),

			height: withinElement.outerHeight()

		};

	}

};

$.fn.position = function( options ) {

	if ( !options || !options.of ) {

		return _position.apply( this, arguments );

	}

	// Make a copy, we don't want to modify arguments

	options = $.extend( {}, options );

	var atOffset, targetWidth, targetHeight, targetOffset, basePosition, dimensions,

		// Make sure string options are treated as CSS selectors

		target = typeof options.of === "string" ?

			$( document ).find( options.of ) :

			$( options.of ),

		within = $.position.getWithinInfo( options.within ),

		scrollInfo = $.position.getScrollInfo( within ),

		collision = ( options.collision || "flip" ).split( " " ),

		offsets = {};

	dimensions = getDimensions( target );

	if ( target[ 0 ].preventDefault ) {

		// Force left top to allow flipping

		options.at = "left top";

	}

	targetWidth = dimensions.width;

	targetHeight = dimensions.height;

	targetOffset = dimensions.offset;

	// Clone to reuse original targetOffset later

	basePosition = $.extend( {}, targetOffset );

	// Force my and at to have valid horizontal and vertical positions

	// if a value is missing or invalid, it will be converted to center

	$.each( [ "my", "at" ], function() {

		var pos = ( options[ this ] || "" ).split( " " ),

			horizontalOffset,

			verticalOffset;

		if ( pos.length === 1 ) {

			pos = rhorizontal.test( pos[ 0 ] ) ?

				pos.concat( [ "center" ] ) :

				rvertical.test( pos[ 0 ] ) ?

					[ "center" ].concat( pos ) :

					[ "center", "center" ];

		}

		pos[ 0 ] = rhorizontal.test( pos[ 0 ] ) ? pos[ 0 ] : "center";

		pos[ 1 ] = rvertical.test( pos[ 1 ] ) ? pos[ 1 ] : "center";

		// Calculate offsets

		horizontalOffset = roffset.exec( pos[ 0 ] );

		verticalOffset = roffset.exec( pos[ 1 ] );

		offsets[ this ] = [

			horizontalOffset ? horizontalOffset[ 0 ] : 0,

			verticalOffset ? verticalOffset[ 0 ] : 0

		];

		// Reduce to just the positions without the offsets

		options[ this ] = [

			rposition.exec( pos[ 0 ] )[ 0 ],

			rposition.exec( pos[ 1 ] )[ 0 ]

		];

	} );

	// Normalize collision option

	if ( collision.length === 1 ) {

		collision[ 1 ] = collision[ 0 ];

	}

	if ( options.at[ 0 ] === "right" ) {

		basePosition.left += targetWidth;

	} else if ( options.at[ 0 ] === "center" ) {

		basePosition.left += targetWidth / 2;

	}

	if ( options.at[ 1 ] === "bottom" ) {

		basePosition.top += targetHeight;

	} else if ( options.at[ 1 ] === "center" ) {

		basePosition.top += targetHeight / 2;

	}

	atOffset = getOffsets( offsets.at, targetWidth, targetHeight );

	basePosition.left += atOffset[ 0 ];

	basePosition.top += atOffset[ 1 ];

	return this.each( function() {

		var collisionPosition, using,

			elem = $( this ),

			elemWidth = elem.outerWidth(),

			elemHeight = elem.outerHeight(),

			marginLeft = parseCss( this, "marginLeft" ),

			marginTop = parseCss( this, "marginTop" ),

			collisionWidth = elemWidth + marginLeft + parseCss( this, "marginRight" ) +

				scrollInfo.width,

			collisionHeight = elemHeight + marginTop + parseCss( this, "marginBottom" ) +

				scrollInfo.height,

			position = $.extend( {}, basePosition ),

			myOffset = getOffsets( offsets.my, elem.outerWidth(), elem.outerHeight() );

		if ( options.my[ 0 ] === "right" ) {

			position.left -= elemWidth;

		} else if ( options.my[ 0 ] === "center" ) {

			position.left -= elemWidth / 2;

		}

		if ( options.my[ 1 ] === "bottom" ) {

			position.top -= elemHeight;

		} else if ( options.my[ 1 ] === "center" ) {

			position.top -= elemHeight / 2;

		}