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Edit File : sortable.js \| Size : 46.52 KB
/! jQuery UI Sortable 1.13.3 * https://jqueryui.com * * Copyright OpenJS Foundation and other contributors * Released under the MIT license. * https://jquery.org/license / //>>label: Sortable //>>group: Interactions //>>description: Enables items in a list to be sorted using the mouse. //>>docs: https://api.jqueryui.com/sortable/ //>>demos: https://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: "1.13.3", 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> </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 }; } } ); } ); Back

Edit File : sortable.js | Size : 46.52 KB

/*!
 * jQuery UI Sortable 1.13.3
 * https://jqueryui.com
 *
 * Copyright OpenJS Foundation and other contributors
 * Released under the MIT license.
 * https://jquery.org/license
 */

//>>label: Sortable
//>>group: Interactions
//>>description: Enables items in a list to be sorted using the mouse.
//>>docs: https://api.jqueryui.com/sortable/
//>>demos: https://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: "1.13.3",
	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
		};
	}

} );

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