/*!

* jQuery UI Sortable 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/sortable/
*/

(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( $ ) {

return $.widget(“ui.sortable”, $.ui.mouse, {

version: "1.11.4",
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.element.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() {
        this.element.find( ".ui-sortable-handle" ).removeClass( "ui-sortable-handle" );
        $.each( this.items, function() {
                ( this.instance.options.handle ?
                        this.item.find( this.instance.options.handle ) : this.item )
                        .addClass( "ui-sortable-handle" );
        });
},

_destroy: function() {
        this.element
                .removeClass( "ui-sortable ui-sortable-disabled" )
                .find( ".ui-sortable-handle" )
                        .removeClass( "ui-sortable-handle" );
        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();

        //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();

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

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

        // Only after we got the 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");

        //Generate the original position
        this.originalPosition = this._generatePosition(event);
        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));

        //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();

        //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 );
        }

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

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

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

},

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

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

        if (!this.lastPositionAbs) {
                this.lastPositionAbs = this.positionAbs;
        }

        //Do scrolling
        if(this.options.scroll) {
                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);
                        }

                }

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

        //Regenerate the absolute position used for position checks
        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";
        }

        //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({ target: null });

                if(this.options.helper === "original") {
                        this.currentItem.css(this._storedCSS).removeClass("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 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,
                verticalDirection = this._getDragVerticalDirection(),
                horizontalDirection = this._getDragHorizontalDirection();

        if (!isOverElement) {
                return false;
        }

        return this.floating ?
                ( ((horizontalDirection && 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._getDragVerticalDirection(),
                horizontalDirection = this._getDragHorizontalDirection();

        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 = $.data(cur[j], this.widgetFullName);
                                if(inst && inst !== this && !inst.options.disabled) {
                                        queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element).not(".ui-sortable-helper").not(".ui-sortable-placeholder"), inst]);
                                }
                        }
                }
        }

        queries.push([$.isFunction(this.options.items) ? 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 = [[$.isFunction(this.options.items) ? this.options.items.call(this.element[0], event, { item: this.currentItem }) : $(this.options.items, this.element), this]],
                connectWith = this._connectWith();

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

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

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

},

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();
        }

        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(item.instance !== this.currentContainer && 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;
        }

        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,
                o = that.options;

        if(!o.placeholder || o.placeholder.constructor === String) {
                className = o.placeholder;
                o.placeholder = {
                        element: function() {

                                var nodeName = that.currentItem[0].nodeName.toLowerCase(),
                                        element = $( "<" + nodeName + ">", that.document[0] )
                                                .addClass(className || that.currentItem[0].className+" ui-sortable-placeholder")
                                                .removeClass("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 by itself (without styles coming from a stylesheet), it receives the inline height from the dragged item
                                if(!p.height()) { 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 ? "clientX" : "clientY";

                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;
                }

                itemWithLeastDistance ? this._rearrange(event, itemWithLeastDistance, null, true) : 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);

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

},

_createHelper: function(event) {

        var o = this.options,
                helper = $.isFunction(o.helper) ? $(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) {
                $(o.appendTo !== "parent" ? o.appendTo : this.currentItem[0].parentNode)[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 ($.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.width() : 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: (
                        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.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * 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.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: (
                        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.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ))
                ),
                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.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ))
                )
        };

},

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

        a ? a[0].appendChild(this.placeholder[0]) : 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) {
                        this.refreshPositions(!hardRefresh); //Precompute after each DOM insertion, NOT on mousemove
                }
        });

},

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

        // 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++) {
                        delayedTriggers[i].call(this, event);
                } //Trigger all delayed events
                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
        };
}

});

}));