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public/assets/jquery-ui/droppable-f66e0a58fd8ebf12f2fa5da8f817f481691dda9d2dfd586a4f71271f5eb4bad7.js

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/*!
 * jQuery UI Core 1.11.4
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/category/ui-core/
 */

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

        // AMD. Register as an anonymous module.
        define( [ "jquery" ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

// $.ui might exist from components with no dependencies, e.g., $.ui.position
$.ui = $.ui || {};

$.extend( $.ui, {
    version: "1.11.4",

    keyCode: {
        BACKSPACE: 8,
        COMMA: 188,
        DELETE: 46,
        DOWN: 40,
        END: 35,
        ENTER: 13,
        ESCAPE: 27,
        HOME: 36,
        LEFT: 37,
        PAGE_DOWN: 34,
        PAGE_UP: 33,
        PERIOD: 190,
        RIGHT: 39,
        SPACE: 32,
        TAB: 9,
        UP: 38
    }
});

// plugins
$.fn.extend({
    scrollParent: function( includeHidden ) {
        var position = this.css( "position" ),
            excludeStaticParent = position === "absolute",
            overflowRegex = includeHidden ? /(auto|scroll|hidden)/ : /(auto|scroll)/,
            scrollParent = this.parents().filter( function() {
                var parent = $( this );
                if ( excludeStaticParent && parent.css( "position" ) === "static" ) {
                    return false;
                }
                return overflowRegex.test( parent.css( "overflow" ) + parent.css( "overflow-y" ) + parent.css( "overflow-x" ) );
            }).eq( 0 );

        return position === "fixed" || !scrollParent.length ? $( this[ 0 ].ownerDocument || document ) : scrollParent;
    },

    uniqueId: (function() {
        var uuid = 0;

        return function() {
            return this.each(function() {
                if ( !this.id ) {
                    this.id = "ui-id-" + ( ++uuid );
                }
            });
        };
    })(),

    removeUniqueId: function() {
        return this.each(function() {
            if ( /^ui-id-\d+$/.test( this.id ) ) {
                $( this ).removeAttr( "id" );
            }
        });
    }
});

// selectors
function focusable( element, isTabIndexNotNaN ) {
    var map, mapName, img,
        nodeName = element.nodeName.toLowerCase();
    if ( "area" === nodeName ) {
        map = element.parentNode;
        mapName = map.name;
        if ( !element.href || !mapName || map.nodeName.toLowerCase() !== "map" ) {
            return false;
        }
        img = $( "img[usemap='#" + mapName + "']" )[ 0 ];
        return !!img && visible( img );
    }
    return ( /^(input|select|textarea|button|object)$/.test( nodeName ) ?
        !element.disabled :
        "a" === nodeName ?
            element.href || isTabIndexNotNaN :
            isTabIndexNotNaN) &&
        // the element and all of its ancestors must be visible
        visible( element );
}

function visible( element ) {
    return $.expr.filters.visible( element ) &&
        !$( element ).parents().addBack().filter(function() {
            return $.css( this, "visibility" ) === "hidden";
        }).length;
}

$.extend( $.expr[ ":" ], {
    data: $.expr.createPseudo ?
        $.expr.createPseudo(function( dataName ) {
            return function( elem ) {
                return !!$.data( elem, dataName );
            };
        }) :
        // support: jQuery <1.8
        function( elem, i, match ) {
            return !!$.data( elem, match[ 3 ] );
        },

    focusable: function( element ) {
        return focusable( element, !isNaN( $.attr( element, "tabindex" ) ) );
    },

    tabbable: function( element ) {
        var tabIndex = $.attr( element, "tabindex" ),
            isTabIndexNaN = isNaN( tabIndex );
        return ( isTabIndexNaN || tabIndex >= 0 ) && focusable( element, !isTabIndexNaN );
    }
});

// support: jQuery <1.8
if ( !$( "<a>" ).outerWidth( 1 ).jquery ) {
    $.each( [ "Width", "Height" ], function( i, name ) {
        var side = name === "Width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ],
            type = name.toLowerCase(),
            orig = {
                innerWidth: $.fn.innerWidth,
                innerHeight: $.fn.innerHeight,
                outerWidth: $.fn.outerWidth,
                outerHeight: $.fn.outerHeight
            };

        function reduce( elem, size, border, margin ) {
            $.each( side, function() {
                size -= parseFloat( $.css( elem, "padding" + this ) ) || 0;
                if ( border ) {
                    size -= parseFloat( $.css( elem, "border" + this + "Width" ) ) || 0;
                }
                if ( margin ) {
                    size -= parseFloat( $.css( elem, "margin" + this ) ) || 0;
                }
            });
            return size;
        }

        $.fn[ "inner" + name ] = function( size ) {
            if ( size === undefined ) {
                return orig[ "inner" + name ].call( this );
            }

            return this.each(function() {
                $( this ).css( type, reduce( this, size ) + "px" );
            });
        };

        $.fn[ "outer" + name] = function( size, margin ) {
            if ( typeof size !== "number" ) {
                return orig[ "outer" + name ].call( this, size );
            }

            return this.each(function() {
                $( this).css( type, reduce( this, size, true, margin ) + "px" );
            });
        };
    });
}

// support: jQuery <1.8
if ( !$.fn.addBack ) {
    $.fn.addBack = function( selector ) {
        return this.add( selector == null ?
            this.prevObject : this.prevObject.filter( selector )
        );
    };
}

// support: jQuery 1.6.1, 1.6.2 (http://bugs.jquery.com/ticket/9413)
if ( $( "<a>" ).data( "a-b", "a" ).removeData( "a-b" ).data( "a-b" ) ) {
    $.fn.removeData = (function( removeData ) {
        return function( key ) {
            if ( arguments.length ) {
                return removeData.call( this, $.camelCase( key ) );
            } else {
                return removeData.call( this );
            }
        };
    })( $.fn.removeData );
}

// deprecated
$.ui.ie = !!/msie [\w.]+/.exec( navigator.userAgent.toLowerCase() );

$.fn.extend({
    focus: (function( orig ) {
        return function( delay, fn ) {
            return typeof delay === "number" ?
                this.each(function() {
                    var elem = this;
                    setTimeout(function() {
                        $( elem ).focus();
                        if ( fn ) {
                            fn.call( elem );
                        }
                    }, delay );
                }) :
                orig.apply( this, arguments );
        };
    })( $.fn.focus ),

    disableSelection: (function() {
        var eventType = "onselectstart" in document.createElement( "div" ) ?
            "selectstart" :
            "mousedown";

        return function() {
            return this.bind( eventType + ".ui-disableSelection", function( event ) {
                event.preventDefault();
            });
        };
    })(),

    enableSelection: function() {
        return this.unbind( ".ui-disableSelection" );
    },

    zIndex: function( zIndex ) {
        if ( zIndex !== undefined ) {
            return this.css( "zIndex", zIndex );
        }

        if ( this.length ) {
            var elem = $( this[ 0 ] ), position, value;
            while ( elem.length && elem[ 0 ] !== document ) {
                // Ignore z-index if position is set to a value where z-index is ignored by the browser
                // This makes behavior of this function consistent across browsers
                // WebKit always returns auto if the element is positioned
                position = elem.css( "position" );
                if ( position === "absolute" || position === "relative" || position === "fixed" ) {
                    // IE returns 0 when zIndex is not specified
                    // other browsers return a string
                    // we ignore the case of nested elements with an explicit value of 0
                    // <div style="z-index: -10;"><div style="z-index: 0;"></div></div>
                    value = parseInt( elem.css( "zIndex" ), 10 );
                    if ( !isNaN( value ) && value !== 0 ) {
                        return value;
                    }
                }
                elem = elem.parent();
            }
        }

        return 0;
    }
});

// $.ui.plugin is deprecated. Use $.widget() extensions instead.
$.ui.plugin = {
    add: function( module, option, set ) {
        var i,
            proto = $.ui[ module ].prototype;
        for ( i in set ) {
            proto.plugins[ i ] = proto.plugins[ i ] || [];
            proto.plugins[ i ].push( [ option, set[ i ] ] );
        }
    },
    call: function( instance, name, args, allowDisconnected ) {
        var i,
            set = instance.plugins[ name ];

        if ( !set ) {
            return;
        }

        if ( !allowDisconnected && ( !instance.element[ 0 ].parentNode || instance.element[ 0 ].parentNode.nodeType === 11 ) ) {
            return;
        }

        for ( i = 0; i < set.length; i++ ) {
            if ( instance.options[ set[ i ][ 0 ] ] ) {
                set[ i ][ 1 ].apply( instance.element, args );
            }
        }
    }
};

}));
/*!
 * jQuery UI Widget 1.11.4
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/jQuery.widget/
 */

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

        // AMD. Register as an anonymous module.
        define( [ "jquery" ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

var widget_uuid = 0,
    widget_slice = Array.prototype.slice;

$.cleanData = (function( orig ) {
    return function( elems ) {
        var events, elem, i;
        for ( i = 0; (elem = elems[i]) != null; i++ ) {
            try {

                // Only trigger remove when necessary to save time
                events = $._data( elem, "events" );
                if ( events && events.remove ) {
                    $( elem ).triggerHandler( "remove" );
                }

            // http://bugs.jquery.com/ticket/8235
            } catch ( e ) {}
        }
        orig( elems );
    };
})( $.cleanData );

$.widget = function( name, base, prototype ) {
    var fullName, existingConstructor, constructor, basePrototype,
        // proxiedPrototype allows the provided prototype to remain unmodified
        // so that it can be used as a mixin for multiple widgets (#8876)
        proxiedPrototype = {},
        namespace = name.split( "." )[ 0 ];

    name = name.split( "." )[ 1 ];
    fullName = namespace + "-" + name;

    if ( !prototype ) {
        prototype = base;
        base = $.Widget;
    }

    // create selector for plugin
    $.expr[ ":" ][ fullName.toLowerCase() ] = function( elem ) {
        return !!$.data( elem, fullName );
    };

    $[ namespace ] = $[ namespace ] || {};
    existingConstructor = $[ namespace ][ name ];
    constructor = $[ namespace ][ name ] = function( options, element ) {
        // allow instantiation without "new" keyword
        if ( !this._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 );
    $.each( prototype, function( prop, value ) {
        if ( !$.isFunction( value ) ) {
            proxiedPrototype[ prop ] = value;
            return;
        }
        proxiedPrototype[ prop ] = (function() {
            var _super = function() {
                    return base.prototype[ prop ].apply( this, arguments );
                },
                _superApply = function( args ) {
                    return base.prototype[ prop ].apply( this, args );
                };
            return function() {
                var __super = this._super,
                    __superApply = this._superApply,
                    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 = widget_slice.call( arguments, 1 ),
        inputIndex = 0,
        inputLength = input.length,
        key,
        value;
    for ( ; inputIndex < inputLength; inputIndex++ ) {
        for ( key in input[ inputIndex ] ) {
            value = input[ inputIndex ][ key ];
            if ( input[ inputIndex ].hasOwnProperty( 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",
            args = widget_slice.call( arguments, 1 ),
            returnValue = this;

        if ( isMethodCall ) {
            this.each(function() {
                var methodValue,
                    instance = $.data( this, fullName );
                if ( options === "instance" ) {
                    returnValue = instance;
                    return false;
                }
                if ( !instance ) {
                    return $.error( "cannot call methods on " + name + " prior to initialization; " +
                        "attempted to call method '" + options + "'" );
                }
                if ( !$.isFunction( instance[options] ) || 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: {
        disabled: false,

        // callbacks
        create: null
    },
    _createWidget: function( options, element ) {
        element = $( element || this.defaultElement || this )[ 0 ];
        this.element = $( element );
        this.uuid = widget_uuid++;
        this.eventNamespace = "." + this.widgetName + this.uuid;

        this.bindings = $();
        this.hoverable = $();
        this.focusable = $();

        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();
        this._trigger( "create", null, this._getCreateEventData() );
        this._init();
    },
    _getCreateOptions: $.noop,
    _getCreateEventData: $.noop,
    _create: $.noop,
    _init: $.noop,

    destroy: function() {
        this._destroy();
        // we can probably remove the unbind calls in 2.0
        // all event bindings should go through this._on()
        this.element
            .unbind( this.eventNamespace )
            .removeData( this.widgetFullName )
            // support: jquery <1.6.3
            // http://bugs.jquery.com/ticket/9413
            .removeData( $.camelCase( this.widgetFullName ) );
        this.widget()
            .unbind( this.eventNamespace )
            .removeAttr( "aria-disabled" )
            .removeClass(
                this.widgetFullName + "-disabled " +
                "ui-state-disabled" );

        // clean up events and states
        this.bindings.unbind( this.eventNamespace );
        this.hoverable.removeClass( "ui-state-hover" );
        this.focusable.removeClass( "ui-state-focus" );
    },
    _destroy: $.noop,

    widget: function() {
        return this.element;
    },

    option: function( key, value ) {
        var options = key,
            parts,
            curOption,
            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 ) {
        this.options[ key ] = value;

        if ( key === "disabled" ) {
            this.widget()
                .toggleClass( this.widgetFullName + "-disabled", !!value );

            // If the widget is becoming disabled, then nothing is interactive
            if ( value ) {
                this.hoverable.removeClass( "ui-state-hover" );
                this.focusable.removeClass( "ui-state-focus" );
            }
        }

        return this;
    },

    enable: function() {
        return this._setOptions({ disabled: false });
    },
    disable: function() {
        return this._setOptions({ disabled: true });
    },

    _on: function( suppressDisabledCheck, element, handlers ) {
        var delegateElement,
            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*(.*)$/ ),
                eventName = match[1] + instance.eventNamespace,
                selector = match[2];
            if ( selector ) {
                delegateElement.delegate( selector, eventName, handlerProxy );
            } else {
                element.bind( eventName, handlerProxy );
            }
        });
    },

    _off: function( element, eventName ) {
        eventName = (eventName || "").split( " " ).join( this.eventNamespace + " " ) +
            this.eventNamespace;
        element.unbind( eventName ).undelegate( 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 ) {
                $( event.currentTarget ).addClass( "ui-state-hover" );
            },
            mouseleave: function( event ) {
                $( event.currentTarget ).removeClass( "ui-state-hover" );
            }
        });
    },

    _focusable: function( element ) {
        this.focusable = this.focusable.add( element );
        this._on( element, {
            focusin: function( event ) {
                $( event.currentTarget ).addClass( "ui-state-focus" );
            },
            focusout: function( event ) {
                $( event.currentTarget ).removeClass( "ui-state-focus" );
            }
        });
    },

    _trigger: function( type, event, data ) {
        var prop, orig,
            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 !( $.isFunction( callback ) &&
            callback.apply( this.element[0], [ event ].concat( data ) ) === false ||
            event.isDefaultPrevented() );
    }
};

$.each( { show: "fadeIn", hide: "fadeOut" }, function( method, defaultEffect ) {
    $.Widget.prototype[ "_" + method ] = function( element, options, callback ) {
        if ( typeof options === "string" ) {
            options = { effect: options };
        }
        var hasOptions,
            effectName = !options ?
                method :
                options === true || typeof options === "number" ?
                    defaultEffect :
                    options.effect || defaultEffect;
        options = options || {};
        if ( typeof options === "number" ) {
            options = { duration: options };
        }
        hasOptions = !$.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();
            });
        }
    };
});

return $.widget;

}));



/*!
 * jQuery UI Mouse 1.11.4
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/mouse/
 */

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

        // AMD. Register as an anonymous module.
        define([
            "jquery",
            "./widget"
        ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

var mouseHandled = false;
$( document ).mouseup( function() {
    mouseHandled = false;
});

return $.widget("ui.mouse", {
    version: "1.11.4",
    options: {
        cancel: "input,textarea,button,select,option",
        distance: 1,
        delay: 0
    },
    _mouseInit: function() {
        var that = this;

        this.element
            .bind("mousedown." + this.widgetName, function(event) {
                return that._mouseDown(event);
            })
            .bind("click." + this.widgetName, function(event) {
                if (true === $.data(event.target, that.widgetName + ".preventClickEvent")) {
                    $.removeData(event.target, that.widgetName + ".preventClickEvent");
                    event.stopImmediatePropagation();
                    return false;
                }
            });

        this.started = false;
    },

    // TODO: make sure destroying one instance of mouse doesn't mess with
    // other instances of mouse
    _mouseDestroy: function() {
        this.element.unbind("." + this.widgetName);
        if ( this._mouseMoveDelegate ) {
            this.document
                .unbind("mousemove." + this.widgetName, this._mouseMoveDelegate)
                .unbind("mouseup." + this.widgetName, this._mouseUpDelegate);
        }
    },

    _mouseDown: function(event) {
        // don't let more than one widget handle mouseStart
        if ( mouseHandled ) {
            return;
        }

        this._mouseMoved = false;

        // we may have missed mouseup (out of window)
        (this._mouseStarted && this._mouseUp(event));

        this._mouseDownEvent = event;

        var that = this,
            btnIsLeft = (event.which === 1),
            // event.target.nodeName works around a bug in IE 8 with
            // disabled inputs (#7620)
            elIsCancel = (typeof this.options.cancel === "string" && event.target.nodeName ? $(event.target).closest(this.options.cancel).length : false);
        if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
            return true;
        }

        this.mouseDelayMet = !this.options.delay;
        if (!this.mouseDelayMet) {
            this._mouseDelayTimer = setTimeout(function() {
                that.mouseDelayMet = true;
            }, this.options.delay);
        }

        if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
            this._mouseStarted = (this._mouseStart(event) !== false);
            if (!this._mouseStarted) {
                event.preventDefault();
                return true;
            }
        }

        // Click event may never have fired (Gecko & Opera)
        if (true === $.data(event.target, this.widgetName + ".preventClickEvent")) {
            $.removeData(event.target, this.widgetName + ".preventClickEvent");
        }

        // these delegates are required to keep context
        this._mouseMoveDelegate = function(event) {
            return that._mouseMove(event);
        };
        this._mouseUpDelegate = function(event) {
            return that._mouseUp(event);
        };

        this.document
            .bind( "mousemove." + this.widgetName, this._mouseMoveDelegate )
            .bind( "mouseup." + this.widgetName, this._mouseUpDelegate );

        event.preventDefault();

        mouseHandled = true;
        return true;
    },

    _mouseMove: function(event) {
        // Only check for mouseups outside the document if you've moved inside the document
        // at least once. This prevents the firing of mouseup in the case of IE<9, which will
        // fire a mousemove event if content is placed under the cursor. See #7778
        // Support: IE <9
        if ( this._mouseMoved ) {
            // IE mouseup check - mouseup happened when mouse was out of window
            if ($.ui.ie && ( !document.documentMode || document.documentMode < 9 ) && !event.button) {
                return this._mouseUp(event);

            // Iframe mouseup check - mouseup occurred in another document
            } else if ( !event.which ) {
                return this._mouseUp( event );
            }
        }

        if ( event.which || event.button ) {
            this._mouseMoved = true;
        }

        if (this._mouseStarted) {
            this._mouseDrag(event);
            return event.preventDefault();
        }

        if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
            this._mouseStarted =
                (this._mouseStart(this._mouseDownEvent, event) !== false);
            (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
        }

        return !this._mouseStarted;
    },

    _mouseUp: function(event) {
        this.document
            .unbind( "mousemove." + this.widgetName, this._mouseMoveDelegate )
            .unbind( "mouseup." + this.widgetName, this._mouseUpDelegate );

        if (this._mouseStarted) {
            this._mouseStarted = false;

            if (event.target === this._mouseDownEvent.target) {
                $.data(event.target, this.widgetName + ".preventClickEvent", true);
            }

            this._mouseStop(event);
        }

        mouseHandled = false;
        return false;
    },

    _mouseDistanceMet: function(event) {
        return (Math.max(
                Math.abs(this._mouseDownEvent.pageX - event.pageX),
                Math.abs(this._mouseDownEvent.pageY - event.pageY)
            ) >= this.options.distance
        );
    },

    _mouseDelayMet: function(/* event */) {
        return this.mouseDelayMet;
    },

    // These are placeholder methods, to be overriden by extending plugin
    _mouseStart: function(/* event */) {},
    _mouseDrag: function(/* event */) {},
    _mouseStop: function(/* event */) {},
    _mouseCapture: function(/* event */) { return true; }
});

}));




/*!
 * jQuery UI Draggable 1.11.4
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/draggable/
 */

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

        // AMD. Register as an anonymous module.
        define([
            "jquery",
            "./core",
            "./mouse",
            "./widget"
        ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

$.widget("ui.draggable", $.ui.mouse, {
    version: "1.11.4",
    widgetEventPrefix: "drag",
    options: {
        addClasses: true,
        appendTo: "parent",
        axis: false,
        connectToSortable: false,
        containment: false,
        cursor: "auto",
        cursorAt: false,
        grid: false,
        handle: false,
        helper: "original",
        iframeFix: false,
        opacity: false,
        refreshPositions: false,
        revert: false,
        revertDuration: 500,
        scope: "default",
        scroll: true,
        scrollSensitivity: 20,
        scrollSpeed: 20,
        snap: false,
        snapMode: "both",
        snapTolerance: 20,
        stack: false,
        zIndex: false,

        // callbacks
        drag: null,
        start: null,
        stop: null
    },
    _create: function() {

        if ( this.options.helper === "original" ) {
            this._setPositionRelative();
        }
        if (this.options.addClasses){
            this.element.addClass("ui-draggable");
        }
        if (this.options.disabled){
            this.element.addClass("ui-draggable-disabled");
        }
        this._setHandleClassName();

        this._mouseInit();
    },

    _setOption: function( key, value ) {
        this._super( key, value );
        if ( key === "handle" ) {
            this._removeHandleClassName();
            this._setHandleClassName();
        }
    },

    _destroy: function() {
        if ( ( this.helper || this.element ).is( ".ui-draggable-dragging" ) ) {
            this.destroyOnClear = true;
            return;
        }
        this.element.removeClass( "ui-draggable ui-draggable-dragging ui-draggable-disabled" );
        this._removeHandleClassName();
        this._mouseDestroy();
    },

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

        this._blurActiveElement( event );

        // among others, prevent a drag on a resizable-handle
        if (this.helper || o.disabled || $(event.target).closest(".ui-resizable-handle").length > 0) {
            return false;
        }

        //Quit if we're not on a valid handle
        this.handle = this._getHandle(event);
        if (!this.handle) {
            return false;
        }

        this._blockFrames( o.iframeFix === true ? "iframe" : o.iframeFix );

        return true;

    },

    _blockFrames: function( selector ) {
        this.iframeBlocks = this.document.find( selector ).map(function() {
            var iframe = $( this );

            return $( "<div>" )
                .css( "position", "absolute" )
                .appendTo( iframe.parent() )
                .outerWidth( iframe.outerWidth() )
                .outerHeight( iframe.outerHeight() )
                .offset( iframe.offset() )[ 0 ];
        });
    },

    _unblockFrames: function() {
        if ( this.iframeBlocks ) {
            this.iframeBlocks.remove();
            delete this.iframeBlocks;
        }
    },

    _blurActiveElement: function( event ) {
        var document = this.document[ 0 ];

        // Only need to blur if the event occurred on the draggable itself, see #10527
        if ( !this.handleElement.is( event.target ) ) {
            return;
        }

        // support: IE9
        // IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
        try {

            // Support: IE9, IE10
            // If the <body> is blurred, IE will switch windows, see #9520
            if ( document.activeElement && document.activeElement.nodeName.toLowerCase() !== "body" ) {

                // Blur any element that currently has focus, see #4261
                $( document.activeElement ).blur();
            }
        } catch ( error ) {}
    },

    _mouseStart: function(event) {

        var o = this.options;

        //Create and append the visible helper
        this.helper = this._createHelper(event);

        this.helper.addClass("ui-draggable-dragging");

        //Cache the helper size
        this._cacheHelperProportions();

        //If ddmanager is used for droppables, set the global draggable
        if ($.ui.ddmanager) {
            $.ui.ddmanager.current = this;
        }

        /*
         * - Position generation -
         * This block generates everything position related - it's the core of draggables.
         */

        //Cache the margins of the original element
        this._cacheMargins();

        //Store the helper's css position
        this.cssPosition = this.helper.css( "position" );
        this.scrollParent = this.helper.scrollParent( true );
        this.offsetParent = this.helper.offsetParent();
        this.hasFixedAncestor = this.helper.parents().filter(function() {
                return $( this ).css( "position" ) === "fixed";
            }).length > 0;

        //The element's absolute position on the page minus margins
        this.positionAbs = this.element.offset();
        this._refreshOffsets( event );

        //Generate the original position
        this.originalPosition = this.position = this._generatePosition( event, false );
        this.originalPageX = event.pageX;
        this.originalPageY = event.pageY;

        //Adjust the mouse offset relative to the helper if "cursorAt" is supplied
        (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));

        //Set a containment if given in the options
        this._setContainment();

        //Trigger event + callbacks
        if (this._trigger("start", event) === false) {
            this._clear();
            return false;
        }

        //Recache the helper size
        this._cacheHelperProportions();

        //Prepare the droppable offsets
        if ($.ui.ddmanager && !o.dropBehaviour) {
            $.ui.ddmanager.prepareOffsets(this, event);
        }

        // Reset helper's right/bottom css if they're set and set explicit width/height instead
        // as this prevents resizing of elements with right/bottom set (see #7772)
        this._normalizeRightBottom();

        this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position

        //If the ddmanager is used for droppables, inform the manager that dragging has started (see #5003)
        if ( $.ui.ddmanager ) {
            $.ui.ddmanager.dragStart(this, event);
        }

        return true;
    },

    _refreshOffsets: function( event ) {
        this.offset = {
            top: this.positionAbs.top - this.margins.top,
            left: this.positionAbs.left - this.margins.left,
            scroll: false,
            parent: this._getParentOffset(),
            relative: this._getRelativeOffset()
        };

        this.offset.click = {
            left: event.pageX - this.offset.left,
            top: event.pageY - this.offset.top
        };
    },

    _mouseDrag: function(event, noPropagation) {
        // reset any necessary cached properties (see #5009)
        if ( this.hasFixedAncestor ) {
            this.offset.parent = this._getParentOffset();
        }

        //Compute the helpers position
        this.position = this._generatePosition( event, true );
        this.positionAbs = this._convertPositionTo("absolute");

        //Call plugins and callbacks and use the resulting position if something is returned
        if (!noPropagation) {
            var ui = this._uiHash();
            if (this._trigger("drag", event, ui) === false) {
                this._mouseUp({});
                return false;
            }
            this.position = ui.position;
        }

        this.helper[ 0 ].style.left = this.position.left + "px";
        this.helper[ 0 ].style.top = this.position.top + "px";

        if ($.ui.ddmanager) {
            $.ui.ddmanager.drag(this, event);
        }

        return false;
    },

    _mouseStop: function(event) {

        //If we are using droppables, inform the manager about the drop
        var that = this,
            dropped = false;
        if ($.ui.ddmanager && !this.options.dropBehaviour) {
            dropped = $.ui.ddmanager.drop(this, event);
        }

        //if a drop comes from outside (a sortable)
        if (this.dropped) {
            dropped = this.dropped;
            this.dropped = false;
        }

        if ((this.options.revert === "invalid" && !dropped) || (this.options.revert === "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) {
            $(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function() {
                if (that._trigger("stop", event) !== false) {
                    that._clear();
                }
            });
        } else {
            if (this._trigger("stop", event) !== false) {
                this._clear();
            }
        }

        return false;
    },

    _mouseUp: function( event ) {
        this._unblockFrames();

        //If the ddmanager is used for droppables, inform the manager that dragging has stopped (see #5003)
        if ( $.ui.ddmanager ) {
            $.ui.ddmanager.dragStop(this, event);
        }

        // Only need to focus if the event occurred on the draggable itself, see #10527
        if ( this.handleElement.is( event.target ) ) {
            // The interaction is over; whether or not the click resulted in a drag, focus the element
            this.element.focus();
        }

        return $.ui.mouse.prototype._mouseUp.call(this, event);
    },

    cancel: function() {

        if (this.helper.is(".ui-draggable-dragging")) {
            this._mouseUp({});
        } else {
            this._clear();
        }

        return this;

    },

    _getHandle: function(event) {
        return this.options.handle ?
            !!$( event.target ).closest( this.element.find( this.options.handle ) ).length :
            true;
    },

    _setHandleClassName: function() {
        this.handleElement = this.options.handle ?
            this.element.find( this.options.handle ) : this.element;
        this.handleElement.addClass( "ui-draggable-handle" );
    },

    _removeHandleClassName: function() {
        this.handleElement.removeClass( "ui-draggable-handle" );
    },

    _createHelper: function(event) {

        var o = this.options,
            helperIsFunction = $.isFunction( o.helper ),
            helper = helperIsFunction ?
                $( o.helper.apply( this.element[ 0 ], [ event ] ) ) :
                ( o.helper === "clone" ?
                    this.element.clone().removeAttr( "id" ) :
                    this.element );

        if (!helper.parents("body").length) {
            helper.appendTo((o.appendTo === "parent" ? this.element[0].parentNode : o.appendTo));
        }

        // http://bugs.jqueryui.com/ticket/9446
        // a helper function can return the original element
        // which wouldn't have been set to relative in _create
        if ( helperIsFunction && helper[ 0 ] === this.element[ 0 ] ) {
            this._setPositionRelative();
        }

        if (helper[0] !== this.element[0] && !(/(fixed|absolute)/).test(helper.css("position"))) {
            helper.css("position", "absolute");
        }

        return helper;

    },

    _setPositionRelative: function() {
        if ( !( /^(?:r|a|f)/ ).test( this.element.css( "position" ) ) ) {
            this.element[ 0 ].style.position = "relative";
        }
    },

    _adjustOffsetFromHelper: function(obj) {
        if (typeof obj === "string") {
            obj = obj.split(" ");
        }
        if ($.isArray(obj)) {
            obj = { left: +obj[0], top: +obj[1] || 0 };
        }
        if ("left" in obj) {
            this.offset.click.left = obj.left + this.margins.left;
        }
        if ("right" in obj) {
            this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
        }
        if ("top" in obj) {
            this.offset.click.top = obj.top + this.margins.top;
        }
        if ("bottom" in obj) {
            this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
        }
    },

    _isRootNode: function( element ) {
        return ( /(html|body)/i ).test( element.tagName ) || element === this.document[ 0 ];
    },

    _getParentOffset: function() {

        //Get the offsetParent and cache its position
        var po = this.offsetParent.offset(),
            document = this.document[ 0 ];

        // This is a special case where we need to modify a offset calculated on start, since the following happened:
        // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
        // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
        //    the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
        if (this.cssPosition === "absolute" && this.scrollParent[0] !== document && $.contains(this.scrollParent[0], this.offsetParent[0])) {
            po.left += this.scrollParent.scrollLeft();
            po.top += this.scrollParent.scrollTop();
        }

        if ( this._isRootNode( this.offsetParent[ 0 ] ) ) {
            po = { top: 0, left: 0 };
        }

        return {
            top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"), 10) || 0),
            left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"), 10) || 0)
        };

    },

    _getRelativeOffset: function() {
        if ( this.cssPosition !== "relative" ) {
            return { top: 0, left: 0 };
        }

        var p = this.element.position(),
            scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );

        return {
            top: p.top - ( parseInt(this.helper.css( "top" ), 10) || 0 ) + ( !scrollIsRootNode ? this.scrollParent.scrollTop() : 0 ),
            left: p.left - ( parseInt(this.helper.css( "left" ), 10) || 0 ) + ( !scrollIsRootNode ? this.scrollParent.scrollLeft() : 0 )
        };

    },

    _cacheMargins: function() {
        this.margins = {
            left: (parseInt(this.element.css("marginLeft"), 10) || 0),
            top: (parseInt(this.element.css("marginTop"), 10) || 0),
            right: (parseInt(this.element.css("marginRight"), 10) || 0),
            bottom: (parseInt(this.element.css("marginBottom"), 10) || 0)
        };
    },

    _cacheHelperProportions: function() {
        this.helperProportions = {
            width: this.helper.outerWidth(),
            height: this.helper.outerHeight()
        };
    },

    _setContainment: function() {

        var isUserScrollable, c, ce,
            o = this.options,
            document = this.document[ 0 ];

        this.relativeContainer = null;

        if ( !o.containment ) {
            this.containment = null;
            return;
        }

        if ( o.containment === "window" ) {
            this.containment = [
                $( window ).scrollLeft() - this.offset.relative.left - this.offset.parent.left,
                $( window ).scrollTop() - this.offset.relative.top - this.offset.parent.top,
                $( window ).scrollLeft() + $( window ).width() - this.helperProportions.width - this.margins.left,
                $( window ).scrollTop() + ( $( window ).height() || document.body.parentNode.scrollHeight ) - this.helperProportions.height - this.margins.top
            ];
            return;
        }

        if ( o.containment === "document") {
            this.containment = [
                0,
                0,
                $( document ).width() - this.helperProportions.width - this.margins.left,
                ( $( document ).height() || document.body.parentNode.scrollHeight ) - this.helperProportions.height - this.margins.top
            ];
            return;
        }

        if ( o.containment.constructor === Array ) {
            this.containment = o.containment;
            return;
        }

        if ( o.containment === "parent" ) {
            o.containment = this.helper[ 0 ].parentNode;
        }

        c = $( o.containment );
        ce = c[ 0 ];

        if ( !ce ) {
            return;
        }

        isUserScrollable = /(scroll|auto)/.test( c.css( "overflow" ) );

        this.containment = [
            ( parseInt( c.css( "borderLeftWidth" ), 10 ) || 0 ) + ( parseInt( c.css( "paddingLeft" ), 10 ) || 0 ),
            ( parseInt( c.css( "borderTopWidth" ), 10 ) || 0 ) + ( parseInt( c.css( "paddingTop" ), 10 ) || 0 ),
            ( isUserScrollable ? Math.max( ce.scrollWidth, ce.offsetWidth ) : ce.offsetWidth ) -
                ( parseInt( c.css( "borderRightWidth" ), 10 ) || 0 ) -
                ( parseInt( c.css( "paddingRight" ), 10 ) || 0 ) -
                this.helperProportions.width -
                this.margins.left -
                this.margins.right,
            ( isUserScrollable ? Math.max( ce.scrollHeight, ce.offsetHeight ) : ce.offsetHeight ) -
                ( parseInt( c.css( "borderBottomWidth" ), 10 ) || 0 ) -
                ( parseInt( c.css( "paddingBottom" ), 10 ) || 0 ) -
                this.helperProportions.height -
                this.margins.top -
                this.margins.bottom
        ];
        this.relativeContainer = c;
    },

    _convertPositionTo: function(d, pos) {

        if (!pos) {
            pos = this.position;
        }

        var mod = d === "absolute" ? 1 : -1,
            scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );

        return {
            top: (
                pos.top    +                                                                // The absolute mouse position
                this.offset.relative.top * mod +                                        // Only for relative positioned nodes: Relative offset from element to offset parent
                this.offset.parent.top * mod -                                        // The offsetParent's offset without borders (offset + border)
                ( ( this.cssPosition === "fixed" ? -this.offset.scroll.top : ( scrollIsRootNode ? 0 : this.offset.scroll.top ) ) * mod)
            ),
            left: (
                pos.left +                                                                // The absolute mouse position
                this.offset.relative.left * mod +                                        // Only for relative positioned nodes: Relative offset from element to offset parent
                this.offset.parent.left * mod    -                                        // The offsetParent's offset without borders (offset + border)
                ( ( this.cssPosition === "fixed" ? -this.offset.scroll.left : ( scrollIsRootNode ? 0 : this.offset.scroll.left ) ) * mod)
            )
        };

    },

    _generatePosition: function( event, constrainPosition ) {

        var containment, co, top, left,
            o = this.options,
            scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] ),
            pageX = event.pageX,
            pageY = event.pageY;

        // Cache the scroll
        if ( !scrollIsRootNode || !this.offset.scroll ) {
            this.offset.scroll = {
                top: this.scrollParent.scrollTop(),
                left: this.scrollParent.scrollLeft()
            };
        }

        /*
         * - Position constraining -
         * Constrain the position to a mix of grid, containment.
         */

        // If we are not dragging yet, we won't check for options
        if ( constrainPosition ) {
            if ( this.containment ) {
                if ( this.relativeContainer ){
                    co = this.relativeContainer.offset();
                    containment = [
                        this.containment[ 0 ] + co.left,
                        this.containment[ 1 ] + co.top,
                        this.containment[ 2 ] + co.left,
                        this.containment[ 3 ] + co.top
                    ];
                } else {
                    containment = this.containment;
                }

                if (event.pageX - this.offset.click.left < containment[0]) {
                    pageX = containment[0] + this.offset.click.left;
                }
                if (event.pageY - this.offset.click.top < containment[1]) {
                    pageY = containment[1] + this.offset.click.top;
                }
                if (event.pageX - this.offset.click.left > containment[2]) {
                    pageX = containment[2] + this.offset.click.left;
                }
                if (event.pageY - this.offset.click.top > containment[3]) {
                    pageY = containment[3] + this.offset.click.top;
                }
            }

            if (o.grid) {
                //Check for grid elements set to 0 to prevent divide by 0 error causing invalid argument errors in IE (see ticket #6950)
                top = o.grid[1] ? this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1] : this.originalPageY;
                pageY = containment ? ((top - this.offset.click.top >= containment[1] || top - this.offset.click.top > containment[3]) ? top : ((top - this.offset.click.top >= containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;

                left = o.grid[0] ? this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0] : this.originalPageX;
                pageX = containment ? ((left - this.offset.click.left >= containment[0] || left - this.offset.click.left > containment[2]) ? left : ((left - this.offset.click.left >= containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
            }

            if ( o.axis === "y" ) {
                pageX = this.originalPageX;
            }

            if ( o.axis === "x" ) {
                pageY = this.originalPageY;
            }
        }

        return {
            top: (
                pageY -                                                                    // The absolute mouse position
                this.offset.click.top    -                                                // Click offset (relative to the element)
                this.offset.relative.top -                                                // Only for relative positioned nodes: Relative offset from element to offset parent
                this.offset.parent.top +                                                // The offsetParent's offset without borders (offset + border)
                ( this.cssPosition === "fixed" ? -this.offset.scroll.top : ( scrollIsRootNode ? 0 : this.offset.scroll.top ) )
            ),
            left: (
                pageX -                                                                    // The absolute mouse position
                this.offset.click.left -                                                // Click offset (relative to the element)
                this.offset.relative.left -                                                // Only for relative positioned nodes: Relative offset from element to offset parent
                this.offset.parent.left +                                                // The offsetParent's offset without borders (offset + border)
                ( this.cssPosition === "fixed" ? -this.offset.scroll.left : ( scrollIsRootNode ? 0 : this.offset.scroll.left ) )
            )
        };

    },

    _clear: function() {
        this.helper.removeClass("ui-draggable-dragging");
        if (this.helper[0] !== this.element[0] && !this.cancelHelperRemoval) {
            this.helper.remove();
        }
        this.helper = null;
        this.cancelHelperRemoval = false;
        if ( this.destroyOnClear ) {
            this.destroy();
        }
    },

    _normalizeRightBottom: function() {
        if ( this.options.axis !== "y" && this.helper.css( "right" ) !== "auto" ) {
            this.helper.width( this.helper.width() );
            this.helper.css( "right", "auto" );
        }
        if ( this.options.axis !== "x" && this.helper.css( "bottom" ) !== "auto" ) {
            this.helper.height( this.helper.height() );
            this.helper.css( "bottom", "auto" );
        }
    },

    // From now on bulk stuff - mainly helpers

    _trigger: function( type, event, ui ) {
        ui = ui || this._uiHash();
        $.ui.plugin.call( this, type, [ event, ui, this ], true );

        // Absolute position and offset (see #6884 ) have to be recalculated after plugins
        if ( /^(drag|start|stop)/.test( type ) ) {
            this.positionAbs = this._convertPositionTo( "absolute" );
            ui.offset = this.positionAbs;
        }
        return $.Widget.prototype._trigger.call( this, type, event, ui );
    },

    plugins: {},

    _uiHash: function() {
        return {
            helper: this.helper,
            position: this.position,
            originalPosition: this.originalPosition,
            offset: this.positionAbs
        };
    }

});

$.ui.plugin.add( "draggable", "connectToSortable", {
    start: function( event, ui, draggable ) {
        var uiSortable = $.extend( {}, ui, {
            item: draggable.element
        });

        draggable.sortables = [];
        $( draggable.options.connectToSortable ).each(function() {
            var sortable = $( this ).sortable( "instance" );

            if ( sortable && !sortable.options.disabled ) {
                draggable.sortables.push( sortable );

                // refreshPositions is called at drag start to refresh the containerCache
                // which is used in drag. This ensures it's initialized and synchronized
                // with any changes that might have happened on the page since initialization.
                sortable.refreshPositions();
                sortable._trigger("activate", event, uiSortable);
            }
        });
    },
    stop: function( event, ui, draggable ) {
        var uiSortable = $.extend( {}, ui, {
            item: draggable.element
        });

        draggable.cancelHelperRemoval = false;

        $.each( draggable.sortables, function() {
            var sortable = this;

            if ( sortable.isOver ) {
                sortable.isOver = 0;

                // Allow this sortable to handle removing the helper
                draggable.cancelHelperRemoval = true;
                sortable.cancelHelperRemoval = false;

                // Use _storedCSS To restore properties in the sortable,
                // as this also handles revert (#9675) since the draggable
                // may have modified them in unexpected ways (#8809)
                sortable._storedCSS = {
                    position: sortable.placeholder.css( "position" ),
                    top: sortable.placeholder.css( "top" ),
                    left: sortable.placeholder.css( "left" )
                };

                sortable._mouseStop(event);

                // Once drag has ended, the sortable should return to using
                // its original helper, not the shared helper from draggable
                sortable.options.helper = sortable.options._helper;
            } else {
                // Prevent this Sortable from removing the helper.
                // However, don't set the draggable to remove the helper
                // either as another connected Sortable may yet handle the removal.
                sortable.cancelHelperRemoval = true;

                sortable._trigger( "deactivate", event, uiSortable );
            }
        });
    },
    drag: function( event, ui, draggable ) {
        $.each( draggable.sortables, function() {
            var innermostIntersecting = false,
                sortable = this;

            // Copy over variables that sortable's _intersectsWith uses
            sortable.positionAbs = draggable.positionAbs;
            sortable.helperProportions = draggable.helperProportions;
            sortable.offset.click = draggable.offset.click;

            if ( sortable._intersectsWith( sortable.containerCache ) ) {
                innermostIntersecting = true;

                $.each( draggable.sortables, function() {
                    // Copy over variables that sortable's _intersectsWith uses
                    this.positionAbs = draggable.positionAbs;
                    this.helperProportions = draggable.helperProportions;
                    this.offset.click = draggable.offset.click;

                    if ( this !== sortable &&
                            this._intersectsWith( this.containerCache ) &&
                            $.contains( sortable.element[ 0 ], this.element[ 0 ] ) ) {
                        innermostIntersecting = false;
                    }

                    return innermostIntersecting;
                });
            }

            if ( innermostIntersecting ) {
                // If it intersects, we use a little isOver variable and set it once,
                // so that the move-in stuff gets fired only once.
                if ( !sortable.isOver ) {
                    sortable.isOver = 1;

                    // Store draggable's parent in case we need to reappend to it later.
                    draggable._parent = ui.helper.parent();

                    sortable.currentItem = ui.helper
                        .appendTo( sortable.element )
                        .data( "ui-sortable-item", true );

                    // Store helper option to later restore it
                    sortable.options._helper = sortable.options.helper;

                    sortable.options.helper = function() {
                        return ui.helper[ 0 ];
                    };

                    // Fire the start events of the sortable with our passed browser event,
                    // and our own helper (so it doesn't create a new one)
                    event.target = sortable.currentItem[ 0 ];
                    sortable._mouseCapture( event, true );
                    sortable._mouseStart( event, true, true );

                    // Because the browser event is way off the new appended portlet,
                    // modify necessary variables to reflect the changes
                    sortable.offset.click.top = draggable.offset.click.top;
                    sortable.offset.click.left = draggable.offset.click.left;
                    sortable.offset.parent.left -= draggable.offset.parent.left -
                        sortable.offset.parent.left;
                    sortable.offset.parent.top -= draggable.offset.parent.top -
                        sortable.offset.parent.top;

                    draggable._trigger( "toSortable", event );

                    // Inform draggable that the helper is in a valid drop zone,
                    // used solely in the revert option to handle "valid/invalid".
                    draggable.dropped = sortable.element;

                    // Need to refreshPositions of all sortables in the case that
                    // adding to one sortable changes the location of the other sortables (#9675)
                    $.each( draggable.sortables, function() {
                        this.refreshPositions();
                    });

                    // hack so receive/update callbacks work (mostly)
                    draggable.currentItem = draggable.element;
                    sortable.fromOutside = draggable;
                }

                if ( sortable.currentItem ) {
                    sortable._mouseDrag( event );
                    // Copy the sortable's position because the draggable's can potentially reflect
                    // a relative position, while sortable is always absolute, which the dragged
                    // element has now become. (#8809)
                    ui.position = sortable.position;
                }
            } else {
                // If it doesn't intersect with the sortable, and it intersected before,
                // we fake the drag stop of the sortable, but make sure it doesn't remove
                // the helper by using cancelHelperRemoval.
                if ( sortable.isOver ) {

                    sortable.isOver = 0;
                    sortable.cancelHelperRemoval = true;

                    // Calling sortable's mouseStop would trigger a revert,
                    // so revert must be temporarily false until after mouseStop is called.
                    sortable.options._revert = sortable.options.revert;
                    sortable.options.revert = false;

                    sortable._trigger( "out", event, sortable._uiHash( sortable ) );
                    sortable._mouseStop( event, true );

                    // restore sortable behaviors that were modfied
                    // when the draggable entered the sortable area (#9481)
                    sortable.options.revert = sortable.options._revert;
                    sortable.options.helper = sortable.options._helper;

                    if ( sortable.placeholder ) {
                        sortable.placeholder.remove();
                    }

                    // Restore and recalculate the draggable's offset considering the sortable
                    // may have modified them in unexpected ways. (#8809, #10669)
                    ui.helper.appendTo( draggable._parent );
                    draggable._refreshOffsets( event );
                    ui.position = draggable._generatePosition( event, true );

                    draggable._trigger( "fromSortable", event );

                    // Inform draggable that the helper is no longer in a valid drop zone
                    draggable.dropped = false;

                    // Need to refreshPositions of all sortables just in case removing
                    // from one sortable changes the location of other sortables (#9675)
                    $.each( draggable.sortables, function() {
                        this.refreshPositions();
                    });
                }
            }
        });
    }
});

$.ui.plugin.add("draggable", "cursor", {
    start: function( event, ui, instance ) {
        var t = $( "body" ),
            o = instance.options;

        if (t.css("cursor")) {
            o._cursor = t.css("cursor");
        }
        t.css("cursor", o.cursor);
    },
    stop: function( event, ui, instance ) {
        var o = instance.options;
        if (o._cursor) {
            $("body").css("cursor", o._cursor);
        }
    }
});

$.ui.plugin.add("draggable", "opacity", {
    start: function( event, ui, instance ) {
        var t = $( ui.helper ),
            o = instance.options;
        if (t.css("opacity")) {
            o._opacity = t.css("opacity");
        }
        t.css("opacity", o.opacity);
    },
    stop: function( event, ui, instance ) {
        var o = instance.options;
        if (o._opacity) {
            $(ui.helper).css("opacity", o._opacity);
        }
    }
});

$.ui.plugin.add("draggable", "scroll", {
    start: function( event, ui, i ) {
        if ( !i.scrollParentNotHidden ) {
            i.scrollParentNotHidden = i.helper.scrollParent( false );
        }

        if ( i.scrollParentNotHidden[ 0 ] !== i.document[ 0 ] && i.scrollParentNotHidden[ 0 ].tagName !== "HTML" ) {
            i.overflowOffset = i.scrollParentNotHidden.offset();
        }
    },
    drag: function( event, ui, i  ) {

        var o = i.options,
            scrolled = false,
            scrollParent = i.scrollParentNotHidden[ 0 ],
            document = i.document[ 0 ];

        if ( scrollParent !== document && scrollParent.tagName !== "HTML" ) {
            if ( !o.axis || o.axis !== "x" ) {
                if ( ( i.overflowOffset.top + scrollParent.offsetHeight ) - event.pageY < o.scrollSensitivity ) {
                    scrollParent.scrollTop = scrolled = scrollParent.scrollTop + o.scrollSpeed;
                } else if ( event.pageY - i.overflowOffset.top < o.scrollSensitivity ) {
                    scrollParent.scrollTop = scrolled = scrollParent.scrollTop - o.scrollSpeed;
                }
            }

            if ( !o.axis || o.axis !== "y" ) {
                if ( ( i.overflowOffset.left + scrollParent.offsetWidth ) - event.pageX < o.scrollSensitivity ) {
                    scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft + o.scrollSpeed;
                } else if ( event.pageX - i.overflowOffset.left < o.scrollSensitivity ) {
                    scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft - o.scrollSpeed;
                }
            }

        } else {

            if (!o.axis || o.axis !== "x") {
                if (event.pageY - $(document).scrollTop() < o.scrollSensitivity) {
                    scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
                } else if ($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity) {
                    scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
                }
            }

            if (!o.axis || o.axis !== "y") {
                if (event.pageX - $(document).scrollLeft() < o.scrollSensitivity) {
                    scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
                } else if ($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity) {
                    scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
                }
            }

        }

        if (scrolled !== false && $.ui.ddmanager && !o.dropBehaviour) {
            $.ui.ddmanager.prepareOffsets(i, event);
        }

    }
});

$.ui.plugin.add("draggable", "snap", {
    start: function( event, ui, i ) {

        var o = i.options;

        i.snapElements = [];

        $(o.snap.constructor !== String ? ( o.snap.items || ":data(ui-draggable)" ) : o.snap).each(function() {
            var $t = $(this),
                $o = $t.offset();
            if (this !== i.element[0]) {
                i.snapElements.push({
                    item: this,
                    width: $t.outerWidth(), height: $t.outerHeight(),
                    top: $o.top, left: $o.left
                });
            }
        });

    },
    drag: function( event, ui, inst ) {

        var ts, bs, ls, rs, l, r, t, b, i, first,
            o = inst.options,
            d = o.snapTolerance,
            x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
            y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;

        for (i = inst.snapElements.length - 1; i >= 0; i--){

            l = inst.snapElements[i].left - inst.margins.left;
            r = l + inst.snapElements[i].width;
            t = inst.snapElements[i].top - inst.margins.top;
            b = t + inst.snapElements[i].height;

            if ( x2 < l - d || x1 > r + d || y2 < t - d || y1 > b + d || !$.contains( inst.snapElements[ i ].item.ownerDocument, inst.snapElements[ i ].item ) ) {
                if (inst.snapElements[i].snapping) {
                    (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
                }
                inst.snapElements[i].snapping = false;
                continue;
            }

            if (o.snapMode !== "inner") {
                ts = Math.abs(t - y2) <= d;
                bs = Math.abs(b - y1) <= d;
                ls = Math.abs(l - x2) <= d;
                rs = Math.abs(r - x1) <= d;
                if (ts) {
                    ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top;
                }
                if (bs) {
                    ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top;
                }
                if (ls) {
                    ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left;
                }
                if (rs) {
                    ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left;
                }
            }

            first = (ts || bs || ls || rs);

            if (o.snapMode !== "outer") {
                ts = Math.abs(t - y1) <= d;
                bs = Math.abs(b - y2) <= d;
                ls = Math.abs(l - x1) <= d;
                rs = Math.abs(r - x2) <= d;
                if (ts) {
                    ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top;
                }
                if (bs) {
                    ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top;
                }
                if (ls) {
                    ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left;
                }
                if (rs) {
                    ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left;
                }
            }

            if (!inst.snapElements[i].snapping && (ts || bs || ls || rs || first)) {
                (inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
            }
            inst.snapElements[i].snapping = (ts || bs || ls || rs || first);

        }

    }
});

$.ui.plugin.add("draggable", "stack", {
    start: function( event, ui, instance ) {
        var min,
            o = instance.options,
            group = $.makeArray($(o.stack)).sort(function(a, b) {
                return (parseInt($(a).css("zIndex"), 10) || 0) - (parseInt($(b).css("zIndex"), 10) || 0);
            });

        if (!group.length) { return; }

        min = parseInt($(group[0]).css("zIndex"), 10) || 0;
        $(group).each(function(i) {
            $(this).css("zIndex", min + i);
        });
        this.css("zIndex", (min + group.length));
    }
});

$.ui.plugin.add("draggable", "zIndex", {
    start: function( event, ui, instance ) {
        var t = $( ui.helper ),
            o = instance.options;

        if (t.css("zIndex")) {
            o._zIndex = t.css("zIndex");
        }
        t.css("zIndex", o.zIndex);
    },
    stop: function( event, ui, instance ) {
        var o = instance.options;

        if (o._zIndex) {
            $(ui.helper).css("zIndex", o._zIndex);
        }
    }
});

return $.ui.draggable;

}));





/*!
 * jQuery UI Droppable 1.11.4
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/droppable/
 */

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

        // AMD. Register as an anonymous module.
        define([
            "jquery",
            "./core",
            "./widget",
            "./mouse",
            "./draggable"
        ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

$.widget( "ui.droppable", {
    version: "1.11.4",
    widgetEventPrefix: "drop",
    options: {
        accept: "*",
        activeClass: false,
        addClasses: true,
        greedy: false,
        hoverClass: false,
        scope: "default",
        tolerance: "intersect",

        // callbacks
        activate: null,
        deactivate: null,
        drop: null,
        out: null,
        over: null
    },
    _create: function() {

        var proportions,
            o = this.options,
            accept = o.accept;

        this.isover = false;
        this.isout = true;

        this.accept = $.isFunction( accept ) ? accept : function( d ) {
            return d.is( accept );
        };

        this.proportions = function( /* valueToWrite */ ) {
            if ( arguments.length ) {
                // Store the droppable's proportions
                proportions = arguments[ 0 ];
            } else {
                // Retrieve or derive the droppable's proportions
                return proportions ?
                    proportions :
                    proportions = {
                        width: this.element[ 0 ].offsetWidth,
                        height: this.element[ 0 ].offsetHeight
                    };
            }
        };

        this._addToManager( o.scope );

        o.addClasses && this.element.addClass( "ui-droppable" );

    },

    _addToManager: function( scope ) {
        // Add the reference and positions to the manager
        $.ui.ddmanager.droppables[ scope ] = $.ui.ddmanager.droppables[ scope ] || [];
        $.ui.ddmanager.droppables[ scope ].push( this );
    },

    _splice: function( drop ) {
        var i = 0;
        for ( ; i < drop.length; i++ ) {
            if ( drop[ i ] === this ) {
                drop.splice( i, 1 );
            }
        }
    },

    _destroy: function() {
        var drop = $.ui.ddmanager.droppables[ this.options.scope ];

        this._splice( drop );

        this.element.removeClass( "ui-droppable ui-droppable-disabled" );
    },

    _setOption: function( key, value ) {

        if ( key === "accept" ) {
            this.accept = $.isFunction( value ) ? value : function( d ) {
                return d.is( value );
            };
        } else if ( key === "scope" ) {
            var drop = $.ui.ddmanager.droppables[ this.options.scope ];

            this._splice( drop );
            this._addToManager( value );
        }

        this._super( key, value );
    },

    _activate: function( event ) {
        var draggable = $.ui.ddmanager.current;
        if ( this.options.activeClass ) {
            this.element.addClass( this.options.activeClass );
        }
        if ( draggable ){
            this._trigger( "activate", event, this.ui( draggable ) );
        }
    },

    _deactivate: function( event ) {
        var draggable = $.ui.ddmanager.current;
        if ( this.options.activeClass ) {
            this.element.removeClass( this.options.activeClass );
        }
        if ( draggable ){
            this._trigger( "deactivate", event, this.ui( draggable ) );
        }
    },

    _over: function( event ) {

        var draggable = $.ui.ddmanager.current;

        // Bail if draggable and droppable are same element
        if ( !draggable || ( draggable.currentItem || draggable.element )[ 0 ] === this.element[ 0 ] ) {
            return;
        }

        if ( this.accept.call( this.element[ 0 ], ( draggable.currentItem || draggable.element ) ) ) {
            if ( this.options.hoverClass ) {
                this.element.addClass( this.options.hoverClass );
            }
            this._trigger( "over", event, this.ui( draggable ) );
        }

    },

    _out: function( event ) {

        var draggable = $.ui.ddmanager.current;

        // Bail if draggable and droppable are same element
        if ( !draggable || ( draggable.currentItem || draggable.element )[ 0 ] === this.element[ 0 ] ) {
            return;
        }

        if ( this.accept.call( this.element[ 0 ], ( draggable.currentItem || draggable.element ) ) ) {
            if ( this.options.hoverClass ) {
                this.element.removeClass( this.options.hoverClass );
            }
            this._trigger( "out", event, this.ui( draggable ) );
        }

    },

    _drop: function( event, custom ) {

        var draggable = custom || $.ui.ddmanager.current,
            childrenIntersection = false;

        // Bail if draggable and droppable are same element
        if ( !draggable || ( draggable.currentItem || draggable.element )[ 0 ] === this.element[ 0 ] ) {
            return false;
        }

        this.element.find( ":data(ui-droppable)" ).not( ".ui-draggable-dragging" ).each(function() {
            var inst = $( this ).droppable( "instance" );
            if (
                inst.options.greedy &&
                !inst.options.disabled &&
                inst.options.scope === draggable.options.scope &&
                inst.accept.call( inst.element[ 0 ], ( draggable.currentItem || draggable.element ) ) &&
                $.ui.intersect( draggable, $.extend( inst, { offset: inst.element.offset() } ), inst.options.tolerance, event )
            ) { childrenIntersection = true; return false; }
        });
        if ( childrenIntersection ) {
            return false;
        }

        if ( this.accept.call( this.element[ 0 ], ( draggable.currentItem || draggable.element ) ) ) {
            if ( this.options.activeClass ) {
                this.element.removeClass( this.options.activeClass );
            }
            if ( this.options.hoverClass ) {
                this.element.removeClass( this.options.hoverClass );
            }
            this._trigger( "drop", event, this.ui( draggable ) );
            return this.element;
        }

        return false;

    },

    ui: function( c ) {
        return {
            draggable: ( c.currentItem || c.element ),
            helper: c.helper,
            position: c.position,
            offset: c.positionAbs
        };
    }

});

$.ui.intersect = (function() {
    function isOverAxis( x, reference, size ) {
        return ( x >= reference ) && ( x < ( reference + size ) );
    }

    return function( draggable, droppable, toleranceMode, event ) {

        if ( !droppable.offset ) {
            return false;
        }

        var x1 = ( draggable.positionAbs || draggable.position.absolute ).left + draggable.margins.left,
            y1 = ( draggable.positionAbs || draggable.position.absolute ).top + draggable.margins.top,
            x2 = x1 + draggable.helperProportions.width,
            y2 = y1 + draggable.helperProportions.height,
            l = droppable.offset.left,
            t = droppable.offset.top,
            r = l + droppable.proportions().width,
            b = t + droppable.proportions().height;

        switch ( toleranceMode ) {
        case "fit":
            return ( l <= x1 && x2 <= r && t <= y1 && y2 <= b );
        case "intersect":
            return ( l < x1 + ( draggable.helperProportions.width / 2 ) && // Right Half
                x2 - ( draggable.helperProportions.width / 2 ) < r && // Left Half
                t < y1 + ( draggable.helperProportions.height / 2 ) && // Bottom Half
                y2 - ( draggable.helperProportions.height / 2 ) < b ); // Top Half
        case "pointer":
            return isOverAxis( event.pageY, t, droppable.proportions().height ) && isOverAxis( event.pageX, l, droppable.proportions().width );
        case "touch":
            return (
                ( y1 >= t && y1 <= b ) || // Top edge touching
                ( y2 >= t && y2 <= b ) || // Bottom edge touching
                ( y1 < t && y2 > b ) // Surrounded vertically
            ) && (
                ( x1 >= l && x1 <= r ) || // Left edge touching
                ( x2 >= l && x2 <= r ) || // Right edge touching
                ( x1 < l && x2 > r ) // Surrounded horizontally
            );
        default:
            return false;
        }
    };
})();

/*
    This manager tracks offsets of draggables and droppables
*/
$.ui.ddmanager = {
    current: null,
    droppables: { "default": [] },
    prepareOffsets: function( t, event ) {

        var i, j,
            m = $.ui.ddmanager.droppables[ t.options.scope ] || [],
            type = event ? event.type : null, // workaround for #2317
            list = ( t.currentItem || t.element ).find( ":data(ui-droppable)" ).addBack();

        droppablesLoop: for ( i = 0; i < m.length; i++ ) {

            // No disabled and non-accepted
            if ( m[ i ].options.disabled || ( t && !m[ i ].accept.call( m[ i ].element[ 0 ], ( t.currentItem || t.element ) ) ) ) {
                continue;
            }

            // Filter out elements in the current dragged item
            for ( j = 0; j < list.length; j++ ) {
                if ( list[ j ] === m[ i ].element[ 0 ] ) {
                    m[ i ].proportions().height = 0;
                    continue droppablesLoop;
                }
            }

            m[ i ].visible = m[ i ].element.css( "display" ) !== "none";
            if ( !m[ i ].visible ) {
                continue;
            }

            // Activate the droppable if used directly from draggables
            if ( type === "mousedown" ) {
                m[ i ]._activate.call( m[ i ], event );
            }

            m[ i ].offset = m[ i ].element.offset();
            m[ i ].proportions({ width: m[ i ].element[ 0 ].offsetWidth, height: m[ i ].element[ 0 ].offsetHeight });

        }

    },
    drop: function( draggable, event ) {

        var dropped = false;
        // Create a copy of the droppables in case the list changes during the drop (#9116)
        $.each( ( $.ui.ddmanager.droppables[ draggable.options.scope ] || [] ).slice(), function() {

            if ( !this.options ) {
                return;
            }
            if ( !this.options.disabled && this.visible && $.ui.intersect( draggable, this, this.options.tolerance, event ) ) {
                dropped = this._drop.call( this, event ) || dropped;
            }

            if ( !this.options.disabled && this.visible && this.accept.call( this.element[ 0 ], ( draggable.currentItem || draggable.element ) ) ) {
                this.isout = true;
                this.isover = false;
                this._deactivate.call( this, event );
            }

        });
        return dropped;

    },
    dragStart: function( draggable, event ) {
        // Listen for scrolling so that if the dragging causes scrolling the position of the droppables can be recalculated (see #5003)
        draggable.element.parentsUntil( "body" ).bind( "scroll.droppable", function() {
            if ( !draggable.options.refreshPositions ) {
                $.ui.ddmanager.prepareOffsets( draggable, event );
            }
        });
    },
    drag: function( draggable, event ) {

        // If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.
        if ( draggable.options.refreshPositions ) {
            $.ui.ddmanager.prepareOffsets( draggable, event );
        }

        // Run through all droppables and check their positions based on specific tolerance options
        $.each( $.ui.ddmanager.droppables[ draggable.options.scope ] || [], function() {

            if ( this.options.disabled || this.greedyChild || !this.visible ) {
                return;
            }

            var parentInstance, scope, parent,
                intersects = $.ui.intersect( draggable, this, this.options.tolerance, event ),
                c = !intersects && this.isover ? "isout" : ( intersects && !this.isover ? "isover" : null );
            if ( !c ) {
                return;
            }

            if ( this.options.greedy ) {
                // find droppable parents with same scope
                scope = this.options.scope;
                parent = this.element.parents( ":data(ui-droppable)" ).filter(function() {
                    return $( this ).droppable( "instance" ).options.scope === scope;
                });

                if ( parent.length ) {
                    parentInstance = $( parent[ 0 ] ).droppable( "instance" );
                    parentInstance.greedyChild = ( c === "isover" );
                }
            }

            // we just moved into a greedy child
            if ( parentInstance && c === "isover" ) {
                parentInstance.isover = false;
                parentInstance.isout = true;
                parentInstance._out.call( parentInstance, event );
            }

            this[ c ] = true;
            this[c === "isout" ? "isover" : "isout"] = false;
            this[c === "isover" ? "_over" : "_out"].call( this, event );

            // we just moved out of a greedy child
            if ( parentInstance && c === "isout" ) {
                parentInstance.isout = false;
                parentInstance.isover = true;
                parentInstance._over.call( parentInstance, event );
            }
        });

    },
    dragStop: function( draggable, event ) {
        draggable.element.parentsUntil( "body" ).unbind( "scroll.droppable" );
        // Call prepareOffsets one final time since IE does not fire return scroll events when overflow was caused by drag (see #5003)
        if ( !draggable.options.refreshPositions ) {
            $.ui.ddmanager.prepareOffsets( draggable, event );
        }
    }
};

return $.ui.droppable;

}));