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/*!
 * jQuery UI Sortable 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Sortable
//>>group: Interactions
//>>description: Enables items in a list to be sorted using the mouse.
//>>docs: http://api.jqueryui.com/sortable/
//>>demos: http://jqueryui.com/sortable/
//>>css.structure: ../../themes/base/sortable.css

( function( factory ) {
    "use strict";

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

        // AMD. Register as an anonymous module.
        define( [
            "jquery",
            "./mouse",
            "../data",
            "../ie",
            "../scroll-parent",
            "../version",
            "../widget"
        ], factory );
    } else {

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

    return $.widget( "ui.sortable", $.ui.mouse, {
        version: "1.13.2",
        widgetEventPrefix: "sort",
        ready: false,
        options: {
            appendTo: "parent",
            axis: false,
            connectWith: false,
            containment: false,
            cursor: "auto",
            cursorAt: false,
            dropOnEmpty: true,
            forcePlaceholderSize: false,
            forceHelperSize: false,
            grid: false,
            handle: false,
            helper: "original",
            items: "> *",
            opacity: false,
            placeholder: false,
            revert: false,
            scroll: true,
            scrollSensitivity: 20,
            scrollSpeed: 20,
            scope: "default",
            tolerance: "intersect",
            zIndex: 1000,

            // Callbacks
            activate: null,
            beforeStop: null,
            change: null,
            deactivate: null,
            out: null,
            over: null,
            receive: null,
            remove: null,
            sort: null,
            start: null,
            stop: null,
            update: null
        },

        _isOverAxis: function( x, reference, size ) {
            return ( x >= reference ) && ( x < ( reference + size ) );
        },

        _isFloating: function( item ) {
            return ( /left|right/ ).test( item.css( "float" ) ) ||
                ( /inline|table-cell/ ).test( item.css( "display" ) );
        },

        _create: function() {
            this.containerCache = {};
            this._addClass( "ui-sortable" );

            //Get the items
            this.refresh();

            //Let's determine the parent's offset
            this.offset = this.element.offset();

            //Initialize mouse events for interaction
            this._mouseInit();

            this._setHandleClassName();

            //We're ready to go
            this.ready = true;

        },

        _setOption: function( key, value ) {
            this._super( key, value );

            if ( key === "handle" ) {
                this._setHandleClassName();
            }
        },

        _setHandleClassName: function() {
            var that = this;
            this._removeClass( this.element.find( ".ui-sortable-handle" ), "ui-sortable-handle" );
            $.each( this.items, function() {
                that._addClass(
                    this.instance.options.handle ?
                        this.item.find( this.instance.options.handle ) :
                        this.item,
                    "ui-sortable-handle"
                );
            } );
        },

        _destroy: function() {
            this._mouseDestroy();

            for ( var i = this.items.length - 1; i >= 0; i-- ) {
                this.items[ i ].item.removeData( this.widgetName + "-item" );
            }

            return this;
        },

        _mouseCapture: function( event, overrideHandle ) {
            var currentItem = null,
                validHandle = false,
                that = this;

            if ( this.reverting ) {
                return false;
            }

            if ( this.options.disabled || this.options.type === "static" ) {
                return false;
            }

            //We have to refresh the items data once first
            this._refreshItems( event );

            //Find out if the clicked node (or one of its parents) is a actual item in this.items
            $( event.target ).parents().each( function() {
                if ( $.data( this, that.widgetName + "-item" ) === that ) {
                    currentItem = $( this );
                    return false;
                }
            } );
            if ( $.data( event.target, that.widgetName + "-item" ) === that ) {
                currentItem = $( event.target );
            }

            if ( !currentItem ) {
                return false;
            }
            if ( this.options.handle && !overrideHandle ) {
                $( this.options.handle, currentItem ).find( "*" ).addBack().each( function() {
                    if ( this === event.target ) {
                        validHandle = true;
                    }
                } );
                if ( !validHandle ) {
                    return false;
                }
            }

            this.currentItem = currentItem;
            this._removeCurrentsFromItems();
            return true;

        },

        _mouseStart: function( event, overrideHandle, noActivation ) {

            var i, body,
                o = this.options;

            this.currentContainer = this;

            //We only need to call refreshPositions, because the refreshItems call has been moved to
            // mouseCapture
            this.refreshPositions();

            //Prepare the dragged items parent
            this.appendTo = $( o.appendTo !== "parent" ?
                o.appendTo :
                this.currentItem.parent() );

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

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

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

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

            //The element's absolute position on the page minus margins
            this.offset = this.currentItem.offset();
            this.offset = {
                top: this.offset.top - this.margins.top,
                left: this.offset.left - this.margins.left
            };

            $.extend( this.offset, {
                click: { //Where the click happened, relative to the element
                    left: event.pageX - this.offset.left,
                    top: event.pageY - this.offset.top
                },

                // This is a relative to absolute position minus the actual position calculation -
                // only used for relative positioned helper
                relative: this._getRelativeOffset()
            } );

            // After we get the helper offset, but before we get the parent offset we can
            // change the helper's position to absolute
            // TODO: Still need to figure out a way to make relative sorting possible
            this.helper.css( "position", "absolute" );
            this.cssPosition = this.helper.css( "position" );

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

            //Cache the former DOM position
            this.domPosition = {
                prev: this.currentItem.prev()[ 0 ],
                parent: this.currentItem.parent()[ 0 ]
            };

            // If the helper is not the original, hide the original so it's not playing any role during
            // the drag, won't cause anything bad this way
            if ( this.helper[ 0 ] !== this.currentItem[ 0 ] ) {
                this.currentItem.hide();
            }

            //Create the placeholder
            this._createPlaceholder();

            //Get the next scrolling parent
            this.scrollParent = this.placeholder.scrollParent();

            $.extend( this.offset, {
                parent: this._getParentOffset()
            } );

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

            if ( o.cursor && o.cursor !== "auto" ) { // cursor option
                body = this.document.find( "body" );

                // Support: IE
                this.storedCursor = body.css( "cursor" );
                body.css( "cursor", o.cursor );

                this.storedStylesheet =
                    $( "<style>*{ cursor: " + o.cursor + " !important; }</style>" ).appendTo( body );
            }

            // We need to make sure to grab the zIndex before setting the
            // opacity, because setting the opacity to anything lower than 1
            // causes the zIndex to change from "auto" to 0.
            if ( o.zIndex ) { // zIndex option
                if ( this.helper.css( "zIndex" ) ) {
                    this._storedZIndex = this.helper.css( "zIndex" );
                }
                this.helper.css( "zIndex", o.zIndex );
            }

            if ( o.opacity ) { // opacity option
                if ( this.helper.css( "opacity" ) ) {
                    this._storedOpacity = this.helper.css( "opacity" );
                }
                this.helper.css( "opacity", o.opacity );
            }

            //Prepare scrolling
            if ( this.scrollParent[ 0 ] !== this.document[ 0 ] &&
                this.scrollParent[ 0 ].tagName !== "HTML" ) {
                this.overflowOffset = this.scrollParent.offset();
            }

            //Call callbacks
            this._trigger( "start", event, this._uiHash() );

            //Recache the helper size
            if ( !this._preserveHelperProportions ) {
                this._cacheHelperProportions();
            }

            //Post "activate" events to possible containers
            if ( !noActivation ) {
                for ( i = this.containers.length - 1; i >= 0; i-- ) {
                    this.containers[ i ]._trigger( "activate", event, this._uiHash( this ) );
                }
            }

            //Prepare possible droppables
            if ( $.ui.ddmanager ) {
                $.ui.ddmanager.current = this;
            }

            if ( $.ui.ddmanager && !o.dropBehaviour ) {
                $.ui.ddmanager.prepareOffsets( this, event );
            }

            this.dragging = true;

            this._addClass( this.helper, "ui-sortable-helper" );

            //Move the helper, if needed
            if ( !this.helper.parent().is( this.appendTo ) ) {
                this.helper.detach().appendTo( this.appendTo );

                //Update position
                this.offset.parent = this._getParentOffset();
            }

            //Generate the original position
            this.position = this.originalPosition = this._generatePosition( event );
            this.originalPageX = event.pageX;
            this.originalPageY = event.pageY;
            this.lastPositionAbs = this.positionAbs = this._convertPositionTo( "absolute" );

            this._mouseDrag( event );

            return true;

        },

        _scroll: function( event ) {
            var o = this.options,
                scrolled = false;

            if ( this.scrollParent[ 0 ] !== this.document[ 0 ] &&
                this.scrollParent[ 0 ].tagName !== "HTML" ) {

                if ( ( this.overflowOffset.top + this.scrollParent[ 0 ].offsetHeight ) -
                    event.pageY < o.scrollSensitivity ) {
                    this.scrollParent[ 0 ].scrollTop =
                        scrolled = this.scrollParent[ 0 ].scrollTop + o.scrollSpeed;
                } else if ( event.pageY - this.overflowOffset.top < o.scrollSensitivity ) {
                    this.scrollParent[ 0 ].scrollTop =
                        scrolled = this.scrollParent[ 0 ].scrollTop - o.scrollSpeed;
                }

                if ( ( this.overflowOffset.left + this.scrollParent[ 0 ].offsetWidth ) -
                    event.pageX < o.scrollSensitivity ) {
                    this.scrollParent[ 0 ].scrollLeft = scrolled =
                        this.scrollParent[ 0 ].scrollLeft + o.scrollSpeed;
                } else if ( event.pageX - this.overflowOffset.left < o.scrollSensitivity ) {
                    this.scrollParent[ 0 ].scrollLeft = scrolled =
                        this.scrollParent[ 0 ].scrollLeft - o.scrollSpeed;
                }

            } else {

                if ( event.pageY - this.document.scrollTop() < o.scrollSensitivity ) {
                    scrolled = this.document.scrollTop( this.document.scrollTop() - o.scrollSpeed );
                } else if ( this.window.height() - ( event.pageY - this.document.scrollTop() ) <
                    o.scrollSensitivity ) {
                    scrolled = this.document.scrollTop( this.document.scrollTop() + o.scrollSpeed );
                }

                if ( event.pageX - this.document.scrollLeft() < o.scrollSensitivity ) {
                    scrolled = this.document.scrollLeft(
                        this.document.scrollLeft() - o.scrollSpeed
                    );
                } else if ( this.window.width() - ( event.pageX - this.document.scrollLeft() ) <
                    o.scrollSensitivity ) {
                    scrolled = this.document.scrollLeft(
                        this.document.scrollLeft() + o.scrollSpeed
                    );
                }

            }

            return scrolled;
        },

        _mouseDrag: function( event ) {
            var i, item, itemElement, intersection,
                o = this.options;

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

            //Set the helper position
            if ( !this.options.axis || this.options.axis !== "y" ) {
                this.helper[ 0 ].style.left = this.position.left + "px";
            }
            if ( !this.options.axis || this.options.axis !== "x" ) {
                this.helper[ 0 ].style.top = this.position.top + "px";
            }

            //Do scrolling
            if ( o.scroll ) {
                if ( this._scroll( event ) !== false ) {

                    //Update item positions used in position checks
                    this._refreshItemPositions( true );

                    if ( $.ui.ddmanager && !o.dropBehaviour ) {
                        $.ui.ddmanager.prepareOffsets( this, event );
                    }
                }
            }

            this.dragDirection = {
                vertical: this._getDragVerticalDirection(),
                horizontal: this._getDragHorizontalDirection()
            };

            //Rearrange
            for ( i = this.items.length - 1; i >= 0; i-- ) {

                //Cache variables and intersection, continue if no intersection
                item = this.items[ i ];
                itemElement = item.item[ 0 ];
                intersection = this._intersectsWithPointer( item );
                if ( !intersection ) {
                    continue;
                }

                // Only put the placeholder inside the current Container, skip all
                // items from other containers. This works because when moving
                // an item from one container to another the
                // currentContainer is switched before the placeholder is moved.
                //
                // Without this, moving items in "sub-sortables" can cause
                // the placeholder to jitter between the outer and inner container.
                if ( item.instance !== this.currentContainer ) {
                    continue;
                }

                // Cannot intersect with itself
                // no useless actions that have been done before
                // no action if the item moved is the parent of the item checked
                if ( itemElement !== this.currentItem[ 0 ] &&
                    this.placeholder[ intersection === 1 ?
                        "next" : "prev" ]()[ 0 ] !== itemElement &&
                    !$.contains( this.placeholder[ 0 ], itemElement ) &&
                    ( this.options.type === "semi-dynamic" ?
                            !$.contains( this.element[ 0 ], itemElement ) :
                            true
                    )
                ) {

                    this.direction = intersection === 1 ? "down" : "up";

                    if ( this.options.tolerance === "pointer" ||
                        this._intersectsWithSides( item ) ) {
                        this._rearrange( event, item );
                    } else {
                        break;
                    }

                    this._trigger( "change", event, this._uiHash() );
                    break;
                }
            }

            //Post events to containers
            this._contactContainers( event );

            //Interconnect with droppables
            if ( $.ui.ddmanager ) {
                $.ui.ddmanager.drag( this, event );
            }

            //Call callbacks
            this._trigger( "sort", event, this._uiHash() );

            this.lastPositionAbs = this.positionAbs;
            return false;

        },

        _mouseStop: function( event, noPropagation ) {

            if ( !event ) {
                return;
            }

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

            if ( this.options.revert ) {
                var that = this,
                    cur = this.placeholder.offset(),
                    axis = this.options.axis,
                    animation = {};

                if ( !axis || axis === "x" ) {
                    animation.left = cur.left - this.offset.parent.left - this.margins.left +
                        ( this.offsetParent[ 0 ] === this.document[ 0 ].body ?
                                0 :
                                this.offsetParent[ 0 ].scrollLeft
                        );
                }
                if ( !axis || axis === "y" ) {
                    animation.top = cur.top - this.offset.parent.top - this.margins.top +
                        ( this.offsetParent[ 0 ] === this.document[ 0 ].body ?
                                0 :
                                this.offsetParent[ 0 ].scrollTop
                        );
                }
                this.reverting = true;
                $( this.helper ).animate(
                    animation,
                    parseInt( this.options.revert, 10 ) || 500,
                    function() {
                        that._clear( event );
                    }
                );
            } else {
                this._clear( event, noPropagation );
            }

            return false;

        },

        cancel: function() {

            if ( this.dragging ) {

                this._mouseUp( new $.Event( "mouseup", { target: null } ) );

                if ( this.options.helper === "original" ) {
                    this.currentItem.css( this._storedCSS );
                    this._removeClass( this.currentItem, "ui-sortable-helper" );
                } else {
                    this.currentItem.show();
                }

                //Post deactivating events to containers
                for ( var i = this.containers.length - 1; i >= 0; i-- ) {
                    this.containers[ i ]._trigger( "deactivate", null, this._uiHash( this ) );
                    if ( this.containers[ i ].containerCache.over ) {
                        this.containers[ i ]._trigger( "out", null, this._uiHash( this ) );
                        this.containers[ i ].containerCache.over = 0;
                    }
                }

            }

            if ( this.placeholder ) {

                //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately,
                // it unbinds ALL events from the original node!
                if ( this.placeholder[ 0 ].parentNode ) {
                    this.placeholder[ 0 ].parentNode.removeChild( this.placeholder[ 0 ] );
                }
                if ( this.options.helper !== "original" && this.helper &&
                    this.helper[ 0 ].parentNode ) {
                    this.helper.remove();
                }

                $.extend( this, {
                    helper: null,
                    dragging: false,
                    reverting: false,
                    _noFinalSort: null
                } );

                if ( this.domPosition.prev ) {
                    $( this.domPosition.prev ).after( this.currentItem );
                } else {
                    $( this.domPosition.parent ).prepend( this.currentItem );
                }
            }

            return this;

        },

        serialize: function( o ) {

            var items = this._getItemsAsjQuery( o && o.connected ),
                str = [];
            o = o || {};

            $( items ).each( function() {
                var res = ( $( o.item || this ).attr( o.attribute || "id" ) || "" )
                    .match( o.expression || ( /(.+)[\-=_](.+)/ ) );
                if ( res ) {
                    str.push(
                        ( o.key || res[ 1 ] + "[]" ) +
                        "=" + ( o.key && o.expression ? res[ 1 ] : res[ 2 ] ) );
                }
            } );

            if ( !str.length && o.key ) {
                str.push( o.key + "=" );
            }

            return str.join( "&" );

        },

        toArray: function( o ) {

            var items = this._getItemsAsjQuery( o && o.connected ),
                ret = [];

            o = o || {};

            items.each( function() {
                ret.push( $( o.item || this ).attr( o.attribute || "id" ) || "" );
            } );
            return ret;

        },

        /* Be careful with the following core functions */
        _intersectsWith: function( item ) {

            var x1 = this.positionAbs.left,
                x2 = x1 + this.helperProportions.width,
                y1 = this.positionAbs.top,
                y2 = y1 + this.helperProportions.height,
                l = item.left,
                r = l + item.width,
                t = item.top,
                b = t + item.height,
                dyClick = this.offset.click.top,
                dxClick = this.offset.click.left,
                isOverElementHeight = ( this.options.axis === "x" ) || ( ( y1 + dyClick ) > t &&
                    ( y1 + dyClick ) < b ),
                isOverElementWidth = ( this.options.axis === "y" ) || ( ( x1 + dxClick ) > l &&
                    ( x1 + dxClick ) < r ),
                isOverElement = isOverElementHeight && isOverElementWidth;

            if ( this.options.tolerance === "pointer" ||
                this.options.forcePointerForContainers ||
                ( this.options.tolerance !== "pointer" &&
                    this.helperProportions[ this.floating ? "width" : "height" ] >
                    item[ this.floating ? "width" : "height" ] )
            ) {
                return isOverElement;
            } else {

                return ( l < x1 + ( this.helperProportions.width / 2 ) && // Right Half
                    x2 - ( this.helperProportions.width / 2 ) < r && // Left Half
                    t < y1 + ( this.helperProportions.height / 2 ) && // Bottom Half
                    y2 - ( this.helperProportions.height / 2 ) < b ); // Top Half

            }
        },

        _intersectsWithPointer: function( item ) {
            var verticalDirection, horizontalDirection,
                isOverElementHeight = ( this.options.axis === "x" ) ||
                    this._isOverAxis(
                        this.positionAbs.top + this.offset.click.top, item.top, item.height ),
                isOverElementWidth = ( this.options.axis === "y" ) ||
                    this._isOverAxis(
                        this.positionAbs.left + this.offset.click.left, item.left, item.width ),
                isOverElement = isOverElementHeight && isOverElementWidth;

            if ( !isOverElement ) {
                return false;
            }

            verticalDirection = this.dragDirection.vertical;
            horizontalDirection = this.dragDirection.horizontal;

            return this.floating ?
                ( ( horizontalDirection === "right" || verticalDirection === "down" ) ? 2 : 1 ) :
                ( verticalDirection && ( verticalDirection === "down" ? 2 : 1 ) );

        },

        _intersectsWithSides: function( item ) {

            var isOverBottomHalf = this._isOverAxis( this.positionAbs.top +
                    this.offset.click.top, item.top + ( item.height / 2 ), item.height ),
                isOverRightHalf = this._isOverAxis( this.positionAbs.left +
                    this.offset.click.left, item.left + ( item.width / 2 ), item.width ),
                verticalDirection = this.dragDirection.vertical,
                horizontalDirection = this.dragDirection.horizontal;

            if ( this.floating && horizontalDirection ) {
                return ( ( horizontalDirection === "right" && isOverRightHalf ) ||
                    ( horizontalDirection === "left" && !isOverRightHalf ) );
            } else {
                return verticalDirection && ( ( verticalDirection === "down" && isOverBottomHalf ) ||
                    ( verticalDirection === "up" && !isOverBottomHalf ) );
            }

        },

        _getDragVerticalDirection: function() {
            var delta = this.positionAbs.top - this.lastPositionAbs.top;
            return delta !== 0 && ( delta > 0 ? "down" : "up" );
        },

        _getDragHorizontalDirection: function() {
            var delta = this.positionAbs.left - this.lastPositionAbs.left;
            return delta !== 0 && ( delta > 0 ? "right" : "left" );
        },

        refresh: function( event ) {
            this._refreshItems( event );
            this._setHandleClassName();
            this.refreshPositions();
            return this;
        },

        _connectWith: function() {
            var options = this.options;
            return options.connectWith.constructor === String ?
                [ options.connectWith ] :
                options.connectWith;
        },

        _getItemsAsjQuery: function( connected ) {

            var i, j, cur, inst,
                items = [],
                queries = [],
                connectWith = this._connectWith();

            if ( connectWith && connected ) {
                for ( i = connectWith.length - 1; i >= 0; i-- ) {
                    cur = $( connectWith[ i ], this.document[ 0 ] );
                    for ( j = cur.length - 1; j >= 0; j-- ) {
                        inst = $.data( cur[ j ], this.widgetFullName );
                        if ( inst && inst !== this && !inst.options.disabled ) {
                            queries.push( [ typeof inst.options.items === "function" ?
                                inst.options.items.call( inst.element ) :
                                $( inst.options.items, inst.element )
                                    .not( ".ui-sortable-helper" )
                                    .not( ".ui-sortable-placeholder" ), inst ] );
                        }
                    }
                }
            }

            queries.push( [ typeof this.options.items === "function" ?
                this.options.items
                    .call( this.element, null, { options: this.options, item: this.currentItem } ) :
                $( this.options.items, this.element )
                    .not( ".ui-sortable-helper" )
                    .not( ".ui-sortable-placeholder" ), this ] );

            function addItems() {
                items.push( this );
            }
            for ( i = queries.length - 1; i >= 0; i-- ) {
                queries[ i ][ 0 ].each( addItems );
            }

            return $( items );

        },

        _removeCurrentsFromItems: function() {

            var list = this.currentItem.find( ":data(" + this.widgetName + "-item)" );

            this.items = $.grep( this.items, function( item ) {
                for ( var j = 0; j < list.length; j++ ) {
                    if ( list[ j ] === item.item[ 0 ] ) {
                        return false;
                    }
                }
                return true;
            } );

        },

        _refreshItems: function( event ) {

            this.items = [];
            this.containers = [ this ];

            var i, j, cur, inst, targetData, _queries, item, queriesLength,
                items = this.items,
                queries = [ [ typeof this.options.items === "function" ?
                    this.options.items.call( this.element[ 0 ], event, { item: this.currentItem } ) :
                    $( this.options.items, this.element ), this ] ],
                connectWith = this._connectWith();

            //Shouldn't be run the first time through due to massive slow-down
            if ( connectWith && this.ready ) {
                for ( i = connectWith.length - 1; i >= 0; i-- ) {
                    cur = $( connectWith[ i ], this.document[ 0 ] );
                    for ( j = cur.length - 1; j >= 0; j-- ) {
                        inst = $.data( cur[ j ], this.widgetFullName );
                        if ( inst && inst !== this && !inst.options.disabled ) {
                            queries.push( [ typeof inst.options.items === "function" ?
                                inst.options.items
                                    .call( inst.element[ 0 ], event, { item: this.currentItem } ) :
                                $( inst.options.items, inst.element ), inst ] );
                            this.containers.push( inst );
                        }
                    }
                }
            }

            for ( i = queries.length - 1; i >= 0; i-- ) {
                targetData = queries[ i ][ 1 ];
                _queries = queries[ i ][ 0 ];

                for ( j = 0, queriesLength = _queries.length; j < queriesLength; j++ ) {
                    item = $( _queries[ j ] );

                    // Data for target checking (mouse manager)
                    item.data( this.widgetName + "-item", targetData );

                    items.push( {
                        item: item,
                        instance: targetData,
                        width: 0, height: 0,
                        left: 0, top: 0
                    } );
                }
            }

        },

        _refreshItemPositions: function( fast ) {
            var i, item, t, p;

            for ( i = this.items.length - 1; i >= 0; i-- ) {
                item = this.items[ i ];

                //We ignore calculating positions of all connected containers when we're not over them
                if ( this.currentContainer && item.instance !== this.currentContainer &&
                    item.item[ 0 ] !== this.currentItem[ 0 ] ) {
                    continue;
                }

                t = this.options.toleranceElement ?
                    $( this.options.toleranceElement, item.item ) :
                    item.item;

                if ( !fast ) {
                    item.width = t.outerWidth();
                    item.height = t.outerHeight();
                }

                p = t.offset();
                item.left = p.left;
                item.top = p.top;
            }
        },

        refreshPositions: function( fast ) {

            // Determine whether items are being displayed horizontally
            this.floating = this.items.length ?
                this.options.axis === "x" || this._isFloating( this.items[ 0 ].item ) :
                false;

            // This has to be redone because due to the item being moved out/into the offsetParent,
            // the offsetParent's position will change
            if ( this.offsetParent && this.helper ) {
                this.offset.parent = this._getParentOffset();
            }

            this._refreshItemPositions( fast );

            var i, p;

            if ( this.options.custom && this.options.custom.refreshContainers ) {
                this.options.custom.refreshContainers.call( this );
            } else {
                for ( i = this.containers.length - 1; i >= 0; i-- ) {
                    p = this.containers[ i ].element.offset();
                    this.containers[ i ].containerCache.left = p.left;
                    this.containers[ i ].containerCache.top = p.top;
                    this.containers[ i ].containerCache.width =
                        this.containers[ i ].element.outerWidth();
                    this.containers[ i ].containerCache.height =
                        this.containers[ i ].element.outerHeight();
                }
            }

            return this;
        },

        _createPlaceholder: function( that ) {
            that = that || this;
            var className, nodeName,
                o = that.options;

            if ( !o.placeholder || o.placeholder.constructor === String ) {
                className = o.placeholder;
                nodeName = that.currentItem[ 0 ].nodeName.toLowerCase();
                o.placeholder = {
                    element: function() {

                        var element = $( "<" + nodeName + ">", that.document[ 0 ] );

                        that._addClass( element, "ui-sortable-placeholder",
                            className || that.currentItem[ 0 ].className )
                            ._removeClass( element, "ui-sortable-helper" );

                        if ( nodeName === "tbody" ) {
                            that._createTrPlaceholder(
                                that.currentItem.find( "tr" ).eq( 0 ),
                                $( "<tr>", that.document[ 0 ] ).appendTo( element )
                            );
                        } else if ( nodeName === "tr" ) {
                            that._createTrPlaceholder( that.currentItem, element );
                        } else if ( nodeName === "img" ) {
                            element.attr( "src", that.currentItem.attr( "src" ) );
                        }

                        if ( !className ) {
                            element.css( "visibility", "hidden" );
                        }

                        return element;
                    },
                    update: function( container, p ) {

                        // 1. If a className is set as 'placeholder option, we don't force sizes -
                        // the class is responsible for that
                        // 2. The option 'forcePlaceholderSize can be enabled to force it even if a
                        // class name is specified
                        if ( className && !o.forcePlaceholderSize ) {
                            return;
                        }

                        // If the element doesn't have a actual height or width by itself (without
                        // styles coming from a stylesheet), it receives the inline height and width
                        // from the dragged item. Or, if it's a tbody or tr, it's going to have a height
                        // anyway since we're populating them with <td>s above, but they're unlikely to
                        // be the correct height on their own if the row heights are dynamic, so we'll
                        // always assign the height of the dragged item given forcePlaceholderSize
                        // is true.
                        if ( !p.height() || ( o.forcePlaceholderSize &&
                            ( nodeName === "tbody" || nodeName === "tr" ) ) ) {
                            p.height(
                                that.currentItem.innerHeight() -
                                parseInt( that.currentItem.css( "paddingTop" ) || 0, 10 ) -
                                parseInt( that.currentItem.css( "paddingBottom" ) || 0, 10 ) );
                        }
                        if ( !p.width() ) {
                            p.width(
                                that.currentItem.innerWidth() -
                                parseInt( that.currentItem.css( "paddingLeft" ) || 0, 10 ) -
                                parseInt( that.currentItem.css( "paddingRight" ) || 0, 10 ) );
                        }
                    }
                };
            }

            //Create the placeholder
            that.placeholder = $( o.placeholder.element.call( that.element, that.currentItem ) );

            //Append it after the actual current item
            that.currentItem.after( that.placeholder );

            //Update the size of the placeholder (TODO: Logic to fuzzy, see line 316/317)
            o.placeholder.update( that, that.placeholder );

        },

        _createTrPlaceholder: function( sourceTr, targetTr ) {
            var that = this;

            sourceTr.children().each( function() {
                $( "<td>&#160;</td>", that.document[ 0 ] )
                    .attr( "colspan", $( this ).attr( "colspan" ) || 1 )
                    .appendTo( targetTr );
            } );
        },

        _contactContainers: function( event ) {
            var i, j, dist, itemWithLeastDistance, posProperty, sizeProperty, cur, nearBottom,
                floating, axis,
                innermostContainer = null,
                innermostIndex = null;

            // Get innermost container that intersects with item
            for ( i = this.containers.length - 1; i >= 0; i-- ) {

                // Never consider a container that's located within the item itself
                if ( $.contains( this.currentItem[ 0 ], this.containers[ i ].element[ 0 ] ) ) {
                    continue;
                }

                if ( this._intersectsWith( this.containers[ i ].containerCache ) ) {

                    // If we've already found a container and it's more "inner" than this, then continue
                    if ( innermostContainer &&
                        $.contains(
                            this.containers[ i ].element[ 0 ],
                            innermostContainer.element[ 0 ] ) ) {
                        continue;
                    }

                    innermostContainer = this.containers[ i ];
                    innermostIndex = i;

                } else {

                    // container doesn't intersect. trigger "out" event if necessary
                    if ( this.containers[ i ].containerCache.over ) {
                        this.containers[ i ]._trigger( "out", event, this._uiHash( this ) );
                        this.containers[ i ].containerCache.over = 0;
                    }
                }

            }

            // If no intersecting containers found, return
            if ( !innermostContainer ) {
                return;
            }

            // Move the item into the container if it's not there already
            if ( this.containers.length === 1 ) {
                if ( !this.containers[ innermostIndex ].containerCache.over ) {
                    this.containers[ innermostIndex ]._trigger( "over", event, this._uiHash( this ) );
                    this.containers[ innermostIndex ].containerCache.over = 1;
                }
            } else {

                // When entering a new container, we will find the item with the least distance and
                // append our item near it
                dist = 10000;
                itemWithLeastDistance = null;
                floating = innermostContainer.floating || this._isFloating( this.currentItem );
                posProperty = floating ? "left" : "top";
                sizeProperty = floating ? "width" : "height";
                axis = floating ? "pageX" : "pageY";

                for ( j = this.items.length - 1; j >= 0; j-- ) {
                    if ( !$.contains(
                        this.containers[ innermostIndex ].element[ 0 ], this.items[ j ].item[ 0 ] )
                    ) {
                        continue;
                    }
                    if ( this.items[ j ].item[ 0 ] === this.currentItem[ 0 ] ) {
                        continue;
                    }

                    cur = this.items[ j ].item.offset()[ posProperty ];
                    nearBottom = false;
                    if ( event[ axis ] - cur > this.items[ j ][ sizeProperty ] / 2 ) {
                        nearBottom = true;
                    }

                    if ( Math.abs( event[ axis ] - cur ) < dist ) {
                        dist = Math.abs( event[ axis ] - cur );
                        itemWithLeastDistance = this.items[ j ];
                        this.direction = nearBottom ? "up" : "down";
                    }
                }

                //Check if dropOnEmpty is enabled
                if ( !itemWithLeastDistance && !this.options.dropOnEmpty ) {
                    return;
                }

                if ( this.currentContainer === this.containers[ innermostIndex ] ) {
                    if ( !this.currentContainer.containerCache.over ) {
                        this.containers[ innermostIndex ]._trigger( "over", event, this._uiHash() );
                        this.currentContainer.containerCache.over = 1;
                    }
                    return;
                }

                if ( itemWithLeastDistance ) {
                    this._rearrange( event, itemWithLeastDistance, null, true );
                } else {
                    this._rearrange( event, null, this.containers[ innermostIndex ].element, true );
                }
                this._trigger( "change", event, this._uiHash() );
                this.containers[ innermostIndex ]._trigger( "change", event, this._uiHash( this ) );
                this.currentContainer = this.containers[ innermostIndex ];

                //Update the placeholder
                this.options.placeholder.update( this.currentContainer, this.placeholder );

                //Update scrollParent
                this.scrollParent = this.placeholder.scrollParent();

                //Update overflowOffset
                if ( this.scrollParent[ 0 ] !== this.document[ 0 ] &&
                    this.scrollParent[ 0 ].tagName !== "HTML" ) {
                    this.overflowOffset = this.scrollParent.offset();
                }

                this.containers[ innermostIndex ]._trigger( "over", event, this._uiHash( this ) );
                this.containers[ innermostIndex ].containerCache.over = 1;
            }

        },

        _createHelper: function( event ) {

            var o = this.options,
                helper = typeof o.helper === "function" ?
                    $( o.helper.apply( this.element[ 0 ], [ event, this.currentItem ] ) ) :
                    ( o.helper === "clone" ? this.currentItem.clone() : this.currentItem );

            //Add the helper to the DOM if that didn't happen already
            if ( !helper.parents( "body" ).length ) {
                this.appendTo[ 0 ].appendChild( helper[ 0 ] );
            }

            if ( helper[ 0 ] === this.currentItem[ 0 ] ) {
                this._storedCSS = {
                    width: this.currentItem[ 0 ].style.width,
                    height: this.currentItem[ 0 ].style.height,
                    position: this.currentItem.css( "position" ),
                    top: this.currentItem.css( "top" ),
                    left: this.currentItem.css( "left" )
                };
            }

            if ( !helper[ 0 ].style.width || o.forceHelperSize ) {
                helper.width( this.currentItem.width() );
            }
            if ( !helper[ 0 ].style.height || o.forceHelperSize ) {
                helper.height( this.currentItem.height() );
            }

            return helper;

        },

        _adjustOffsetFromHelper: function( obj ) {
            if ( typeof obj === "string" ) {
                obj = obj.split( " " );
            }
            if ( Array.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;
            }
        },

        _getParentOffset: function() {

            //Get the offsetParent and cache its position
            this.offsetParent = this.helper.offsetParent();
            var po = this.offsetParent.offset();

            // 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 ] !== this.document[ 0 ] &&
                $.contains( this.scrollParent[ 0 ], this.offsetParent[ 0 ] ) ) {
                po.left += this.scrollParent.scrollLeft();
                po.top += this.scrollParent.scrollTop();
            }

            // This needs to be actually done for all browsers, since pageX/pageY includes this
            // information with an ugly IE fix
            if ( this.offsetParent[ 0 ] === this.document[ 0 ].body ||
                ( this.offsetParent[ 0 ].tagName &&
                    this.offsetParent[ 0 ].tagName.toLowerCase() === "html" && $.ui.ie ) ) {
                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" ) {
                var p = this.currentItem.position();
                return {
                    top: p.top - ( parseInt( this.helper.css( "top" ), 10 ) || 0 ) +
                        this.scrollParent.scrollTop(),
                    left: p.left - ( parseInt( this.helper.css( "left" ), 10 ) || 0 ) +
                        this.scrollParent.scrollLeft()
                };
            } else {
                return { top: 0, left: 0 };
            }

        },

        _cacheMargins: function() {
            this.margins = {
                left: ( parseInt( this.currentItem.css( "marginLeft" ), 10 ) || 0 ),
                top: ( parseInt( this.currentItem.css( "marginTop" ), 10 ) || 0 )
            };
        },

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

        _setContainment: function() {

            var ce, co, over,
                o = this.options;
            if ( o.containment === "parent" ) {
                o.containment = this.helper[ 0 ].parentNode;
            }
            if ( o.containment === "document" || o.containment === "window" ) {
                this.containment = [
                    0 - this.offset.relative.left - this.offset.parent.left,
                    0 - this.offset.relative.top - this.offset.parent.top,
                    o.containment === "document" ?
                        this.document.width() :
                        this.window.width() - this.helperProportions.width - this.margins.left,
                    ( o.containment === "document" ?
                            ( this.document.height() || document.body.parentNode.scrollHeight ) :
                            this.window.height() || this.document[ 0 ].body.parentNode.scrollHeight
                    ) - this.helperProportions.height - this.margins.top
                ];
            }

            if ( !( /^(document|window|parent)$/ ).test( o.containment ) ) {
                ce = $( o.containment )[ 0 ];
                co = $( o.containment ).offset();
                over = ( $( ce ).css( "overflow" ) !== "hidden" );

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

        },

        _convertPositionTo: function( d, pos ) {

            if ( !pos ) {
                pos = this.position;
            }
            var mod = d === "absolute" ? 1 : -1,
                scroll = this.cssPosition === "absolute" &&
                !( this.scrollParent[ 0 ] !== this.document[ 0 ] &&
                    $.contains( this.scrollParent[ 0 ], this.offsetParent[ 0 ] ) ) ?
                    this.offsetParent :
                    this.scrollParent,
                scrollIsRootNode = ( /(html|body)/i ).test( scroll[ 0 ].tagName );

            return {
                top: (

                    // The absolute mouse position
                    pos.top	+

                    // Only for relative positioned nodes: Relative offset from element to offset parent
                    this.offset.relative.top * mod +

                    // The offsetParent's offset without borders (offset + border)
                    this.offset.parent.top * mod -
                    ( ( this.cssPosition === "fixed" ?
                        -this.scrollParent.scrollTop() :
                        ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod )
                ),
                left: (

                    // The absolute mouse position
                    pos.left +

                    // Only for relative positioned nodes: Relative offset from element to offset parent
                    this.offset.relative.left * mod +

                    // The offsetParent's offset without borders (offset + border)
                    this.offset.parent.left * mod	-
                    ( ( this.cssPosition === "fixed" ?
                        -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 :
                            scroll.scrollLeft() ) * mod )
                )
            };

        },

        _generatePosition: function( event ) {

            var top, left,
                o = this.options,
                pageX = event.pageX,
                pageY = event.pageY,
                scroll = this.cssPosition === "absolute" &&
                !( this.scrollParent[ 0 ] !== this.document[ 0 ] &&
                    $.contains( this.scrollParent[ 0 ], this.offsetParent[ 0 ] ) ) ?
                    this.offsetParent :
                    this.scrollParent,
                scrollIsRootNode = ( /(html|body)/i ).test( scroll[ 0 ].tagName );

            // This is another very weird special case that only happens for relative elements:
            // 1. If the css position is relative
            // 2. and the scroll parent is the document or similar to the offset parent
            // we have to refresh the relative offset during the scroll so there are no jumps
            if ( this.cssPosition === "relative" && !( this.scrollParent[ 0 ] !== this.document[ 0 ] &&
                this.scrollParent[ 0 ] !== this.offsetParent[ 0 ] ) ) {
                this.offset.relative = this._getRelativeOffset();
            }

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

            if ( this.originalPosition ) { //If we are not dragging yet, we won't check for options

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

                if ( o.grid ) {
                    top = this.originalPageY + Math.round( ( pageY - this.originalPageY ) /
                        o.grid[ 1 ] ) * o.grid[ 1 ];
                    pageY = this.containment ?
                        ( ( top - this.offset.click.top >= this.containment[ 1 ] &&
                            top - this.offset.click.top <= this.containment[ 3 ] ) ?
                            top :
                            ( ( top - this.offset.click.top >= this.containment[ 1 ] ) ?
                                top - o.grid[ 1 ] : top + o.grid[ 1 ] ) ) :
                        top;

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

            }

            return {
                top: (

                    // The absolute mouse position
                    pageY -

                    // Click offset (relative to the element)
                    this.offset.click.top -

                    // Only for relative positioned nodes: Relative offset from element to offset parent
                    this.offset.relative.top -

                    // The offsetParent's offset without borders (offset + border)
                    this.offset.parent.top +
                    ( ( this.cssPosition === "fixed" ?
                        -this.scrollParent.scrollTop() :
                        ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) )
                ),
                left: (

                    // The absolute mouse position
                    pageX -

                    // Click offset (relative to the element)
                    this.offset.click.left -

                    // Only for relative positioned nodes: Relative offset from element to offset parent
                    this.offset.relative.left -

                    // The offsetParent's offset without borders (offset + border)
                    this.offset.parent.left +
                    ( ( this.cssPosition === "fixed" ?
                        -this.scrollParent.scrollLeft() :
                        scrollIsRootNode ? 0 : scroll.scrollLeft() ) )
                )
            };

        },

        _rearrange: function( event, i, a, hardRefresh ) {

            if ( a ) {
                a[ 0 ].appendChild( this.placeholder[ 0 ] );
            } else {
                i.item[ 0 ].parentNode.insertBefore( this.placeholder[ 0 ],
                    ( this.direction === "down" ? i.item[ 0 ] : i.item[ 0 ].nextSibling ) );
            }

            //Various things done here to improve the performance:
            // 1. we create a setTimeout, that calls refreshPositions
            // 2. on the instance, we have a counter variable, that get's higher after every append
            // 3. on the local scope, we copy the counter variable, and check in the timeout,
            // if it's still the same
            // 4. this lets only the last addition to the timeout stack through
            this.counter = this.counter ? ++this.counter : 1;
            var counter = this.counter;

            this._delay( function() {
                if ( counter === this.counter ) {

                    //Precompute after each DOM insertion, NOT on mousemove
                    this.refreshPositions( !hardRefresh );
                }
            } );

        },

        _clear: function( event, noPropagation ) {

            this.reverting = false;

            // We delay all events that have to be triggered to after the point where the placeholder
            // has been removed and everything else normalized again
            var i,
                delayedTriggers = [];

            // We first have to update the dom position of the actual currentItem
            // Note: don't do it if the current item is already removed (by a user), or it gets
            // reappended (see #4088)
            if ( !this._noFinalSort && this.currentItem.parent().length ) {
                this.placeholder.before( this.currentItem );
            }
            this._noFinalSort = null;

            if ( this.helper[ 0 ] === this.currentItem[ 0 ] ) {
                for ( i in this._storedCSS ) {
                    if ( this._storedCSS[ i ] === "auto" || this._storedCSS[ i ] === "static" ) {
                        this._storedCSS[ i ] = "";
                    }
                }
                this.currentItem.css( this._storedCSS );
                this._removeClass( this.currentItem, "ui-sortable-helper" );
            } else {
                this.currentItem.show();
            }

            if ( this.fromOutside && !noPropagation ) {
                delayedTriggers.push( function( event ) {
                    this._trigger( "receive", event, this._uiHash( this.fromOutside ) );
                } );
            }
            if ( ( this.fromOutside ||
                this.domPosition.prev !==
                this.currentItem.prev().not( ".ui-sortable-helper" )[ 0 ] ||
                this.domPosition.parent !== this.currentItem.parent()[ 0 ] ) && !noPropagation ) {

                // Trigger update callback if the DOM position has changed
                delayedTriggers.push( function( event ) {
                    this._trigger( "update", event, this._uiHash() );
                } );
            }

            // Check if the items Container has Changed and trigger appropriate
            // events.
            if ( this !== this.currentContainer ) {
                if ( !noPropagation ) {
                    delayedTriggers.push( function( event ) {
                        this._trigger( "remove", event, this._uiHash() );
                    } );
                    delayedTriggers.push( ( function( c ) {
                        return function( event ) {
                            c._trigger( "receive", event, this._uiHash( this ) );
                        };
                    } ).call( this, this.currentContainer ) );
                    delayedTriggers.push( ( function( c ) {
                        return function( event ) {
                            c._trigger( "update", event, this._uiHash( this ) );
                        };
                    } ).call( this, this.currentContainer ) );
                }
            }

            //Post events to containers
            function delayEvent( type, instance, container ) {
                return function( event ) {
                    container._trigger( type, event, instance._uiHash( instance ) );
                };
            }
            for ( i = this.containers.length - 1; i >= 0; i-- ) {
                if ( !noPropagation ) {
                    delayedTriggers.push( delayEvent( "deactivate", this, this.containers[ i ] ) );
                }
                if ( this.containers[ i ].containerCache.over ) {
                    delayedTriggers.push( delayEvent( "out", this, this.containers[ i ] ) );
                    this.containers[ i ].containerCache.over = 0;
                }
            }

            //Do what was originally in plugins
            if ( this.storedCursor ) {
                this.document.find( "body" ).css( "cursor", this.storedCursor );
                this.storedStylesheet.remove();
            }
            if ( this._storedOpacity ) {
                this.helper.css( "opacity", this._storedOpacity );
            }
            if ( this._storedZIndex ) {
                this.helper.css( "zIndex", this._storedZIndex === "auto" ? "" : this._storedZIndex );
            }

            this.dragging = false;

            if ( !noPropagation ) {
                this._trigger( "beforeStop", event, this._uiHash() );
            }

            //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately,
            // it unbinds ALL events from the original node!
            this.placeholder[ 0 ].parentNode.removeChild( this.placeholder[ 0 ] );

            if ( !this.cancelHelperRemoval ) {
                if ( this.helper[ 0 ] !== this.currentItem[ 0 ] ) {
                    this.helper.remove();
                }
                this.helper = null;
            }

            if ( !noPropagation ) {
                for ( i = 0; i < delayedTriggers.length; i++ ) {

                    // Trigger all delayed events
                    delayedTriggers[ i ].call( this, event );
                }
                this._trigger( "stop", event, this._uiHash() );
            }

            this.fromOutside = false;
            return !this.cancelHelperRemoval;

        },

        _trigger: function() {
            if ( $.Widget.prototype._trigger.apply( this, arguments ) === false ) {
                this.cancel();
            }
        },

        _uiHash: function( _inst ) {
            var inst = _inst || this;
            return {
                helper: inst.helper,
                placeholder: inst.placeholder || $( [] ),
                position: inst.position,
                originalPosition: inst.originalPosition,
                offset: inst.positionAbs,
                item: inst.currentItem,
                sender: _inst ? _inst.element : null
            };
        }

    } );

} );