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draggable.js (35343B)

---

 /*!
  * jQuery UI Draggable 1.12.1
  * http://jqueryui.com
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license.
  * http://jquery.org/license
  */
 
 //>>label: Draggable
 //>>group: Interactions
 //>>description: Enables dragging functionality for any element.
 //>>docs: http://api.jqueryui.com/draggable/
 //>>demos: http://jqueryui.com/draggable/
 //>>css.structure: ../../themes/base/draggable.css
 
 ( function( factory ) {
 	if ( typeof define === "function" && define.amd ) {
 
 		// AMD. Register as an anonymous module.
 		define( [
 			"jquery",
 			"./mouse",
 			"./core"
 		], factory );
 	} else {
 
 		// Browser globals
 		factory( jQuery );
 	}
 }( function( $ ) {
 
 $.widget( "ui.draggable", $.ui.mouse, {
 	version: "1.12.1",
 	widgetEventPrefix: "drag",
 	options: {
 		addClasses: true,
 		appendTo: "parent",
 		axis: false,
 		connectToSortable: false,
 		containment: false,
 		cursor: "auto",
 		cursorAt: false,
 		grid: false,
 		handle: false,
 		helper: "original",
 		iframeFix: false,
 		opacity: false,
 		refreshPositions: false,
 		revert: false,
 		revertDuration: 500,
 		scope: "default",
 		scroll: true,
 		scrollSensitivity: 20,
 		scrollSpeed: 20,
 		snap: false,
 		snapMode: "both",
 		snapTolerance: 20,
 		stack: false,
 		zIndex: false,
 
 		// Callbacks
 		drag: null,
 		start: null,
 		stop: null
 	},
 	_create: function() {
 
 		if ( this.options.helper === "original" ) {
 			this._setPositionRelative();
 		}
 		if ( this.options.addClasses ) {
 			this._addClass( "ui-draggable" );
 		}
 		this._setHandleClassName();
 
 		this._mouseInit();
 	},
 
 	_setOption: function( key, value ) {
 		this._super( key, value );
 		if ( key === "handle" ) {
 			this._removeHandleClassName();
 			this._setHandleClassName();
 		}
 	},
 
 	_destroy: function() {
 		if ( ( this.helper || this.element ).is( ".ui-draggable-dragging" ) ) {
 			this.destroyOnClear = true;
 			return;
 		}
 		this._removeHandleClassName();
 		this._mouseDestroy();
 	},
 
 	_mouseCapture: function( event ) {
 		var o = this.options;
 
 		// Among others, prevent a drag on a resizable-handle
 		if ( this.helper || o.disabled ||
 				$( event.target ).closest( ".ui-resizable-handle" ).length > 0 ) {
 			return false;
 		}
 
 		//Quit if we're not on a valid handle
 		this.handle = this._getHandle( event );
 		if ( !this.handle ) {
 			return false;
 		}
 
 		this._blurActiveElement( event );
 
 		this._blockFrames( o.iframeFix === true ? "iframe" : o.iframeFix );
 
 		return true;
 
 	},
 
 	_blockFrames: function( selector ) {
 		this.iframeBlocks = this.document.find( selector ).map( function() {
 			var iframe = $( this );
 
 			return $( "<div>" )
 				.css( "position", "absolute" )
 				.appendTo( iframe.parent() )
 				.outerWidth( iframe.outerWidth() )
 				.outerHeight( iframe.outerHeight() )
 				.offset( iframe.offset() )[ 0 ];
 		} );
 	},
 
 	_unblockFrames: function() {
 		if ( this.iframeBlocks ) {
 			this.iframeBlocks.remove();
 			delete this.iframeBlocks;
 		}
 	},
 
 	_blurActiveElement: function( event ) {
 		var activeElement = $.ui.safeActiveElement( this.document[ 0 ] ),
 			target = $( event.target );
 
 		// Don't blur if the event occurred on an element that is within
 		// the currently focused element
 		// See #10527, #12472
 		if ( target.closest( activeElement ).length ) {
 			return;
 		}
 
 		// Blur any element that currently has focus, see #4261
 		$.ui.safeBlur( activeElement );
 	},
 
 	_mouseStart: function( event ) {
 
 		var o = this.options;
 
 		//Create and append the visible helper
 		this.helper = this._createHelper( event );
 
 		this._addClass( this.helper, "ui-draggable-dragging" );
 
 		//Cache the helper size
 		this._cacheHelperProportions();
 
 		//If ddmanager is used for droppables, set the global draggable
 		if ( $.ui.ddmanager ) {
 			$.ui.ddmanager.current = this;
 		}
 
 		/*
 		 * - Position generation -
 		 * This block generates everything position related - it's the core of draggables.
 		 */
 
 		//Cache the margins of the original element
 		this._cacheMargins();
 
 		//Store the helper's css position
 		this.cssPosition = this.helper.css( "position" );
 		this.scrollParent = this.helper.scrollParent( true );
 		this.offsetParent = this.helper.offsetParent();
 		this.hasFixedAncestor = this.helper.parents().filter( function() {
 				return $( this ).css( "position" ) === "fixed";
 			} ).length > 0;
 
 		//The element's absolute position on the page minus margins
 		this.positionAbs = this.element.offset();
 		this._refreshOffsets( event );
 
 		//Generate the original position
 		this.originalPosition = this.position = this._generatePosition( event, false );
 		this.originalPageX = event.pageX;
 		this.originalPageY = event.pageY;
 
 		//Adjust the mouse offset relative to the helper if "cursorAt" is supplied
 		( o.cursorAt && this._adjustOffsetFromHelper( o.cursorAt ) );
 
 		//Set a containment if given in the options
 		this._setContainment();
 
 		//Trigger event + callbacks
 		if ( this._trigger( "start", event ) === false ) {
 			this._clear();
 			return false;
 		}
 
 		//Recache the helper size
 		this._cacheHelperProportions();
 
 		//Prepare the droppable offsets
 		if ( $.ui.ddmanager && !o.dropBehaviour ) {
 			$.ui.ddmanager.prepareOffsets( this, event );
 		}
 
 		// Execute the drag once - this causes the helper not to be visible before getting its
 		// correct position
 		this._mouseDrag( event, true );
 
 		// If the ddmanager is used for droppables, inform the manager that dragging has started
 		// (see #5003)
 		if ( $.ui.ddmanager ) {
 			$.ui.ddmanager.dragStart( this, event );
 		}
 
 		return true;
 	},
 
 	_refreshOffsets: function( event ) {
 		this.offset = {
 			top: this.positionAbs.top - this.margins.top,
 			left: this.positionAbs.left - this.margins.left,
 			scroll: false,
 			parent: this._getParentOffset(),
 			relative: this._getRelativeOffset()
 		};
 
 		this.offset.click = {
 			left: event.pageX - this.offset.left,
 			top: event.pageY - this.offset.top
 		};
 	},
 
 	_mouseDrag: function( event, noPropagation ) {
 
 		// reset any necessary cached properties (see #5009)
 		if ( this.hasFixedAncestor ) {
 			this.offset.parent = this._getParentOffset();
 		}
 
 		//Compute the helpers position
 		this.position = this._generatePosition( event, true );
 		this.positionAbs = this._convertPositionTo( "absolute" );
 
 		//Call plugins and callbacks and use the resulting position if something is returned
 		if ( !noPropagation ) {
 			var ui = this._uiHash();
 			if ( this._trigger( "drag", event, ui ) === false ) {
 				this._mouseUp( new $.Event( "mouseup", event ) );
 				return false;
 			}
 			this.position = ui.position;
 		}
 
 		this.helper[ 0 ].style.left = this.position.left + "px";
 		this.helper[ 0 ].style.top = this.position.top + "px";
 
 		if ( $.ui.ddmanager ) {
 			$.ui.ddmanager.drag( this, event );
 		}
 
 		return false;
 	},
 
 	_mouseStop: function( event ) {
 
 		//If we are using droppables, inform the manager about the drop
 		var that = this,
 			dropped = false;
 		if ( $.ui.ddmanager && !this.options.dropBehaviour ) {
 			dropped = $.ui.ddmanager.drop( this, event );
 		}
 
 		//if a drop comes from outside (a sortable)
 		if ( this.dropped ) {
 			dropped = this.dropped;
 			this.dropped = false;
 		}
 
 		if ( ( this.options.revert === "invalid" && !dropped ) ||
 				( this.options.revert === "valid" && dropped ) ||
 				this.options.revert === true || ( $.isFunction( this.options.revert ) &&
 				this.options.revert.call( this.element, dropped ) )
 		) {
 			$( this.helper ).animate(
 				this.originalPosition,
 				parseInt( this.options.revertDuration, 10 ),
 				function() {
 					if ( that._trigger( "stop", event ) !== false ) {
 						that._clear();
 					}
 				}
 			);
 		} else {
 			if ( this._trigger( "stop", event ) !== false ) {
 				this._clear();
 			}
 		}
 
 		return false;
 	},
 
 	_mouseUp: function( event ) {
 		this._unblockFrames();
 
 		// If the ddmanager is used for droppables, inform the manager that dragging has stopped
 		// (see #5003)
 		if ( $.ui.ddmanager ) {
 			$.ui.ddmanager.dragStop( this, event );
 		}
 
 		// Only need to focus if the event occurred on the draggable itself, see #10527
 		if ( this.handleElement.is( event.target ) ) {
 
 			// The interaction is over; whether or not the click resulted in a drag,
 			// focus the element
 			this.element.trigger( "focus" );
 		}
 
 		return $.ui.mouse.prototype._mouseUp.call( this, event );
 	},
 
 	cancel: function() {
 
 		if ( this.helper.is( ".ui-draggable-dragging" ) ) {
 			this._mouseUp( new $.Event( "mouseup", { target: this.element[ 0 ] } ) );
 		} else {
 			this._clear();
 		}
 
 		return this;
 
 	},
 
 	_getHandle: function( event ) {
 		return this.options.handle ?
 			!!$( event.target ).closest( this.element.find( this.options.handle ) ).length :
 			true;
 	},
 
 	_setHandleClassName: function() {
 		this.handleElement = this.options.handle ?
 			this.element.find( this.options.handle ) : this.element;
 		this._addClass( this.handleElement, "ui-draggable-handle" );
 	},
 
 	_removeHandleClassName: function() {
 		this._removeClass( this.handleElement, "ui-draggable-handle" );
 	},
 
 	_createHelper: function( event ) {
 
 		var o = this.options,
 			helperIsFunction = $.isFunction( o.helper ),
 			helper = helperIsFunction ?
 				$( o.helper.apply( this.element[ 0 ], [ event ] ) ) :
 				( o.helper === "clone" ?
 					this.element.clone().removeAttr( "id" ) :
 					this.element );
 
 		if ( !helper.parents( "body" ).length ) {
 			helper.appendTo( ( o.appendTo === "parent" ?
 				this.element[ 0 ].parentNode :
 				o.appendTo ) );
 		}
 
 		// Http://bugs.jqueryui.com/ticket/9446
 		// a helper function can return the original element
 		// which wouldn't have been set to relative in _create
 		if ( helperIsFunction && helper[ 0 ] === this.element[ 0 ] ) {
 			this._setPositionRelative();
 		}
 
 		if ( helper[ 0 ] !== this.element[ 0 ] &&
 				!( /(fixed|absolute)/ ).test( helper.css( "position" ) ) ) {
 			helper.css( "position", "absolute" );
 		}
 
 		return helper;
 
 	},
 
 	_setPositionRelative: function() {
 		if ( !( /^(?:r|a|f)/ ).test( this.element.css( "position" ) ) ) {
 			this.element[ 0 ].style.position = "relative";
 		}
 	},
 
 	_adjustOffsetFromHelper: function( obj ) {
 		if ( typeof obj === "string" ) {
 			obj = obj.split( " " );
 		}
 		if ( $.isArray( obj ) ) {
 			obj = { left: +obj[ 0 ], top: +obj[ 1 ] || 0 };
 		}
 		if ( "left" in obj ) {
 			this.offset.click.left = obj.left + this.margins.left;
 		}
 		if ( "right" in obj ) {
 			this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
 		}
 		if ( "top" in obj ) {
 			this.offset.click.top = obj.top + this.margins.top;
 		}
 		if ( "bottom" in obj ) {
 			this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
 		}
 	},
 
 	_isRootNode: function( element ) {
 		return ( /(html|body)/i ).test( element.tagName ) || element === this.document[ 0 ];
 	},
 
 	_getParentOffset: function() {
 
 		//Get the offsetParent and cache its position
 		var po = this.offsetParent.offset(),
 			document = this.document[ 0 ];
 
 		// This is a special case where we need to modify a offset calculated on start, since the
 		// following happened:
 		// 1. The position of the helper is absolute, so it's position is calculated based on the
 		// next positioned parent
 		// 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't
 		// the document, which means that the scroll is included in the initial calculation of the
 		// offset of the parent, and never recalculated upon drag
 		if ( this.cssPosition === "absolute" && this.scrollParent[ 0 ] !== document &&
 				$.contains( this.scrollParent[ 0 ], this.offsetParent[ 0 ] ) ) {
 			po.left += this.scrollParent.scrollLeft();
 			po.top += this.scrollParent.scrollTop();
 		}
 
 		if ( this._isRootNode( this.offsetParent[ 0 ] ) ) {
 			po = { top: 0, left: 0 };
 		}
 
 		return {
 			top: po.top + ( parseInt( this.offsetParent.css( "borderTopWidth" ), 10 ) || 0 ),
 			left: po.left + ( parseInt( this.offsetParent.css( "borderLeftWidth" ), 10 ) || 0 )
 		};
 
 	},
 
 	_getRelativeOffset: function() {
 		if ( this.cssPosition !== "relative" ) {
 			return { top: 0, left: 0 };
 		}
 
 		var p = this.element.position(),
 			scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );
 
 		return {
 			top: p.top - ( parseInt( this.helper.css( "top" ), 10 ) || 0 ) +
 				( !scrollIsRootNode ? this.scrollParent.scrollTop() : 0 ),
 			left: p.left - ( parseInt( this.helper.css( "left" ), 10 ) || 0 ) +
 				( !scrollIsRootNode ? this.scrollParent.scrollLeft() : 0 )
 		};
 
 	},
 
 	_cacheMargins: function() {
 		this.margins = {
 			left: ( parseInt( this.element.css( "marginLeft" ), 10 ) || 0 ),
 			top: ( parseInt( this.element.css( "marginTop" ), 10 ) || 0 ),
 			right: ( parseInt( this.element.css( "marginRight" ), 10 ) || 0 ),
 			bottom: ( parseInt( this.element.css( "marginBottom" ), 10 ) || 0 )
 		};
 	},
 
 	_cacheHelperProportions: function() {
 		this.helperProportions = {
 			width: this.helper.outerWidth(),
 			height: this.helper.outerHeight()
 		};
 	},
 
 	_setContainment: function() {
 
 		var isUserScrollable, c, ce,
 			o = this.options,
 			document = this.document[ 0 ];
 
 		this.relativeContainer = null;
 
 		if ( !o.containment ) {
 			this.containment = null;
 			return;
 		}
 
 		if ( o.containment === "window" ) {
 			this.containment = [
 				$( window ).scrollLeft() - this.offset.relative.left - this.offset.parent.left,
 				$( window ).scrollTop() - this.offset.relative.top - this.offset.parent.top,
 				$( window ).scrollLeft() + $( window ).width() -
 					this.helperProportions.width - this.margins.left,
 				$( window ).scrollTop() +
 					( $( window ).height() || document.body.parentNode.scrollHeight ) -
 					this.helperProportions.height - this.margins.top
 			];
 			return;
 		}
 
 		if ( o.containment === "document" ) {
 			this.containment = [
 				0,
 				0,
 				$( document ).width() - this.helperProportions.width - this.margins.left,
 				( $( document ).height() || document.body.parentNode.scrollHeight ) -
 					this.helperProportions.height - this.margins.top
 			];
 			return;
 		}
 
 		if ( o.containment.constructor === Array ) {
 			this.containment = o.containment;
 			return;
 		}
 
 		if ( o.containment === "parent" ) {
 			o.containment = this.helper[ 0 ].parentNode;
 		}
 
 		c = $( o.containment );
 		ce = c[ 0 ];
 
 		if ( !ce ) {
 			return;
 		}
 
 		isUserScrollable = /(scroll|auto)/.test( c.css( "overflow" ) );
 
 		this.containment = [
 			( parseInt( c.css( "borderLeftWidth" ), 10 ) || 0 ) +
 				( parseInt( c.css( "paddingLeft" ), 10 ) || 0 ),
 			( parseInt( c.css( "borderTopWidth" ), 10 ) || 0 ) +
 				( parseInt( c.css( "paddingTop" ), 10 ) || 0 ),
 			( isUserScrollable ? Math.max( ce.scrollWidth, ce.offsetWidth ) : ce.offsetWidth ) -
 				( parseInt( c.css( "borderRightWidth" ), 10 ) || 0 ) -
 				( parseInt( c.css( "paddingRight" ), 10 ) || 0 ) -
 				this.helperProportions.width -
 				this.margins.left -
 				this.margins.right,
 			( isUserScrollable ? Math.max( ce.scrollHeight, ce.offsetHeight ) : ce.offsetHeight ) -
 				( parseInt( c.css( "borderBottomWidth" ), 10 ) || 0 ) -
 				( parseInt( c.css( "paddingBottom" ), 10 ) || 0 ) -
 				this.helperProportions.height -
 				this.margins.top -
 				this.margins.bottom
 		];
 		this.relativeContainer = c;
 	},
 
 	_convertPositionTo: function( d, pos ) {
 
 		if ( !pos ) {
 			pos = this.position;
 		}
 
 		var mod = d === "absolute" ? 1 : -1,
 			scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );
 
 		return {
 			top: (
 
 				// 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.offset.scroll.top :
 					( scrollIsRootNode ? 0 : this.offset.scroll.top ) ) * 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.offset.scroll.left :
 					( scrollIsRootNode ? 0 : this.offset.scroll.left ) ) * mod )
 			)
 		};
 
 	},
 
 	_generatePosition: function( event, constrainPosition ) {
 
 		var containment, co, top, left,
 			o = this.options,
 			scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] ),
 			pageX = event.pageX,
 			pageY = event.pageY;
 
 		// Cache the scroll
 		if ( !scrollIsRootNode || !this.offset.scroll ) {
 			this.offset.scroll = {
 				top: this.scrollParent.scrollTop(),
 				left: this.scrollParent.scrollLeft()
 			};
 		}
 
 		/*
 		 * - Position constraining -
 		 * Constrain the position to a mix of grid, containment.
 		 */
 
 		// If we are not dragging yet, we won't check for options
 		if ( constrainPosition ) {
 			if ( this.containment ) {
 				if ( this.relativeContainer ) {
 					co = this.relativeContainer.offset();
 					containment = [
 						this.containment[ 0 ] + co.left,
 						this.containment[ 1 ] + co.top,
 						this.containment[ 2 ] + co.left,
 						this.containment[ 3 ] + co.top
 					];
 				} else {
 					containment = this.containment;
 				}
 
 				if ( event.pageX - this.offset.click.left < containment[ 0 ] ) {
 					pageX = containment[ 0 ] + this.offset.click.left;
 				}
 				if ( event.pageY - this.offset.click.top < containment[ 1 ] ) {
 					pageY = containment[ 1 ] + this.offset.click.top;
 				}
 				if ( event.pageX - this.offset.click.left > containment[ 2 ] ) {
 					pageX = containment[ 2 ] + this.offset.click.left;
 				}
 				if ( event.pageY - this.offset.click.top > containment[ 3 ] ) {
 					pageY = containment[ 3 ] + this.offset.click.top;
 				}
 			}
 
 			if ( o.grid ) {
 
 				//Check for grid elements set to 0 to prevent divide by 0 error causing invalid
 				// argument errors in IE (see ticket #6950)
 				top = o.grid[ 1 ] ? this.originalPageY + Math.round( ( pageY -
 					this.originalPageY ) / o.grid[ 1 ] ) * o.grid[ 1 ] : this.originalPageY;
 				pageY = containment ? ( ( top - this.offset.click.top >= containment[ 1 ] ||
 					top - this.offset.click.top > containment[ 3 ] ) ?
 						top :
 						( ( top - this.offset.click.top >= containment[ 1 ] ) ?
 							top - o.grid[ 1 ] : top + o.grid[ 1 ] ) ) : top;
 
 				left = o.grid[ 0 ] ? this.originalPageX +
 					Math.round( ( pageX - this.originalPageX ) / o.grid[ 0 ] ) * o.grid[ 0 ] :
 					this.originalPageX;
 				pageX = containment ? ( ( left - this.offset.click.left >= containment[ 0 ] ||
 					left - this.offset.click.left > containment[ 2 ] ) ?
 						left :
 						( ( left - this.offset.click.left >= containment[ 0 ] ) ?
 							left - o.grid[ 0 ] : left + o.grid[ 0 ] ) ) : left;
 			}
 
 			if ( o.axis === "y" ) {
 				pageX = this.originalPageX;
 			}
 
 			if ( o.axis === "x" ) {
 				pageY = this.originalPageY;
 			}
 		}
 
 		return {
 			top: (
 
 				// 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.offset.scroll.top :
 					( scrollIsRootNode ? 0 : this.offset.scroll.top ) )
 			),
 			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.offset.scroll.left :
 					( scrollIsRootNode ? 0 : this.offset.scroll.left ) )
 			)
 		};
 
 	},
 
 	_clear: function() {
 		this._removeClass( this.helper, "ui-draggable-dragging" );
 		if ( this.helper[ 0 ] !== this.element[ 0 ] && !this.cancelHelperRemoval ) {
 			this.helper.remove();
 		}
 		this.helper = null;
 		this.cancelHelperRemoval = false;
 		if ( this.destroyOnClear ) {
 			this.destroy();
 		}
 	},
 
 	// From now on bulk stuff - mainly helpers
 
 	_trigger: function( type, event, ui ) {
 		ui = ui || this._uiHash();
 		$.ui.plugin.call( this, type, [ event, ui, this ], true );
 
 		// Absolute position and offset (see #6884 ) have to be recalculated after plugins
 		if ( /^(drag|start|stop)/.test( type ) ) {
 			this.positionAbs = this._convertPositionTo( "absolute" );
 			ui.offset = this.positionAbs;
 		}
 		return $.Widget.prototype._trigger.call( this, type, event, ui );
 	},
 
 	plugins: {},
 
 	_uiHash: function() {
 		return {
 			helper: this.helper,
 			position: this.position,
 			originalPosition: this.originalPosition,
 			offset: this.positionAbs
 		};
 	}
 
 } );
 
 $.ui.plugin.add( "draggable", "connectToSortable", {
 	start: function( event, ui, draggable ) {
 		var uiSortable = $.extend( {}, ui, {
 			item: draggable.element
 		} );
 
 		draggable.sortables = [];
 		$( draggable.options.connectToSortable ).each( function() {
 			var sortable = $( this ).sortable( "instance" );
 
 			if ( sortable && !sortable.options.disabled ) {
 				draggable.sortables.push( sortable );
 
 				// RefreshPositions is called at drag start to refresh the containerCache
 				// which is used in drag. This ensures it's initialized and synchronized
 				// with any changes that might have happened on the page since initialization.
 				sortable.refreshPositions();
 				sortable._trigger( "activate", event, uiSortable );
 			}
 		} );
 	},
 	stop: function( event, ui, draggable ) {
 		var uiSortable = $.extend( {}, ui, {
 			item: draggable.element
 		} );
 
 		draggable.cancelHelperRemoval = false;
 
 		$.each( draggable.sortables, function() {
 			var sortable = this;
 
 			if ( sortable.isOver ) {
 				sortable.isOver = 0;
 
 				// Allow this sortable to handle removing the helper
 				draggable.cancelHelperRemoval = true;
 				sortable.cancelHelperRemoval = false;
 
 				// Use _storedCSS To restore properties in the sortable,
 				// as this also handles revert (#9675) since the draggable
 				// may have modified them in unexpected ways (#8809)
 				sortable._storedCSS = {
 					position: sortable.placeholder.css( "position" ),
 					top: sortable.placeholder.css( "top" ),
 					left: sortable.placeholder.css( "left" )
 				};
 
 				sortable._mouseStop( event );
 
 				// Once drag has ended, the sortable should return to using
 				// its original helper, not the shared helper from draggable
 				sortable.options.helper = sortable.options._helper;
 			} else {
 
 				// Prevent this Sortable from removing the helper.
 				// However, don't set the draggable to remove the helper
 				// either as another connected Sortable may yet handle the removal.
 				sortable.cancelHelperRemoval = true;
 
 				sortable._trigger( "deactivate", event, uiSortable );
 			}
 		} );
 	},
 	drag: function( event, ui, draggable ) {
 		$.each( draggable.sortables, function() {
 			var innermostIntersecting = false,
 				sortable = this;
 
 			// Copy over variables that sortable's _intersectsWith uses
 			sortable.positionAbs = draggable.positionAbs;
 			sortable.helperProportions = draggable.helperProportions;
 			sortable.offset.click = draggable.offset.click;
 
 			if ( sortable._intersectsWith( sortable.containerCache ) ) {
 				innermostIntersecting = true;
 
 				$.each( draggable.sortables, function() {
 
 					// Copy over variables that sortable's _intersectsWith uses
 					this.positionAbs = draggable.positionAbs;
 					this.helperProportions = draggable.helperProportions;
 					this.offset.click = draggable.offset.click;
 
 					if ( this !== sortable &&
 							this._intersectsWith( this.containerCache ) &&
 							$.contains( sortable.element[ 0 ], this.element[ 0 ] ) ) {
 						innermostIntersecting = false;
 					}
 
 					return innermostIntersecting;
 				} );
 			}
 
 			if ( innermostIntersecting ) {
 
 				// If it intersects, we use a little isOver variable and set it once,
 				// so that the move-in stuff gets fired only once.
 				if ( !sortable.isOver ) {
 					sortable.isOver = 1;
 
 					// Store draggable's parent in case we need to reappend to it later.
 					draggable._parent = ui.helper.parent();
 
 					sortable.currentItem = ui.helper
 						.appendTo( sortable.element )
 						.data( "ui-sortable-item", true );
 
 					// Store helper option to later restore it
 					sortable.options._helper = sortable.options.helper;
 
 					sortable.options.helper = function() {
 						return ui.helper[ 0 ];
 					};
 
 					// Fire the start events of the sortable with our passed browser event,
 					// and our own helper (so it doesn't create a new one)
 					event.target = sortable.currentItem[ 0 ];
 					sortable._mouseCapture( event, true );
 					sortable._mouseStart( event, true, true );
 
 					// Because the browser event is way off the new appended portlet,
 					// modify necessary variables to reflect the changes
 					sortable.offset.click.top = draggable.offset.click.top;
 					sortable.offset.click.left = draggable.offset.click.left;
 					sortable.offset.parent.left -= draggable.offset.parent.left -
 						sortable.offset.parent.left;
 					sortable.offset.parent.top -= draggable.offset.parent.top -
 						sortable.offset.parent.top;
 
 					draggable._trigger( "toSortable", event );
 
 					// Inform draggable that the helper is in a valid drop zone,
 					// used solely in the revert option to handle "valid/invalid".
 					draggable.dropped = sortable.element;
 
 					// Need to refreshPositions of all sortables in the case that
 					// adding to one sortable changes the location of the other sortables (#9675)
 					$.each( draggable.sortables, function() {
 						this.refreshPositions();
 					} );
 
 					// Hack so receive/update callbacks work (mostly)
 					draggable.currentItem = draggable.element;
 					sortable.fromOutside = draggable;
 				}
 
 				if ( sortable.currentItem ) {
 					sortable._mouseDrag( event );
 
 					// Copy the sortable's position because the draggable's can potentially reflect
 					// a relative position, while sortable is always absolute, which the dragged
 					// element has now become. (#8809)
 					ui.position = sortable.position;
 				}
 			} else {
 
 				// If it doesn't intersect with the sortable, and it intersected before,
 				// we fake the drag stop of the sortable, but make sure it doesn't remove
 				// the helper by using cancelHelperRemoval.
 				if ( sortable.isOver ) {
 
 					sortable.isOver = 0;
 					sortable.cancelHelperRemoval = true;
 
 					// Calling sortable's mouseStop would trigger a revert,
 					// so revert must be temporarily false until after mouseStop is called.
 					sortable.options._revert = sortable.options.revert;
 					sortable.options.revert = false;
 
 					sortable._trigger( "out", event, sortable._uiHash( sortable ) );
 					sortable._mouseStop( event, true );
 
 					// Restore sortable behaviors that were modfied
 					// when the draggable entered the sortable area (#9481)
 					sortable.options.revert = sortable.options._revert;
 					sortable.options.helper = sortable.options._helper;
 
 					if ( sortable.placeholder ) {
 						sortable.placeholder.remove();
 					}
 
 					// Restore and recalculate the draggable's offset considering the sortable
 					// may have modified them in unexpected ways. (#8809, #10669)
 					ui.helper.appendTo( draggable._parent );
 					draggable._refreshOffsets( event );
 					ui.position = draggable._generatePosition( event, true );
 
 					draggable._trigger( "fromSortable", event );
 
 					// Inform draggable that the helper is no longer in a valid drop zone
 					draggable.dropped = false;
 
 					// Need to refreshPositions of all sortables just in case removing
 					// from one sortable changes the location of other sortables (#9675)
 					$.each( draggable.sortables, function() {
 						this.refreshPositions();
 					} );
 				}
 			}
 		} );
 	}
 } );
 
 $.ui.plugin.add( "draggable", "cursor", {
 	start: function( event, ui, instance ) {
 		var t = $( "body" ),
 			o = instance.options;
 
 		if ( t.css( "cursor" ) ) {
 			o._cursor = t.css( "cursor" );
 		}
 		t.css( "cursor", o.cursor );
 	},
 	stop: function( event, ui, instance ) {
 		var o = instance.options;
 		if ( o._cursor ) {
 			$( "body" ).css( "cursor", o._cursor );
 		}
 	}
 } );
 
 $.ui.plugin.add( "draggable", "opacity", {
 	start: function( event, ui, instance ) {
 		var t = $( ui.helper ),
 			o = instance.options;
 		if ( t.css( "opacity" ) ) {
 			o._opacity = t.css( "opacity" );
 		}
 		t.css( "opacity", o.opacity );
 	},
 	stop: function( event, ui, instance ) {
 		var o = instance.options;
 		if ( o._opacity ) {
 			$( ui.helper ).css( "opacity", o._opacity );
 		}
 	}
 } );
 
 $.ui.plugin.add( "draggable", "scroll", {
 	start: function( event, ui, i ) {
 		if ( !i.scrollParentNotHidden ) {
 			i.scrollParentNotHidden = i.helper.scrollParent( false );
 		}
 
 		if ( i.scrollParentNotHidden[ 0 ] !== i.document[ 0 ] &&
 				i.scrollParentNotHidden[ 0 ].tagName !== "HTML" ) {
 			i.overflowOffset = i.scrollParentNotHidden.offset();
 		}
 	},
 	drag: function( event, ui, i  ) {
 
 		var o = i.options,
 			scrolled = false,
 			scrollParent = i.scrollParentNotHidden[ 0 ],
 			document = i.document[ 0 ];
 
 		if ( scrollParent !== document && scrollParent.tagName !== "HTML" ) {
 			if ( !o.axis || o.axis !== "x" ) {
 				if ( ( i.overflowOffset.top + scrollParent.offsetHeight ) - event.pageY <
 						o.scrollSensitivity ) {
 					scrollParent.scrollTop = scrolled = scrollParent.scrollTop + o.scrollSpeed;
 				} else if ( event.pageY - i.overflowOffset.top < o.scrollSensitivity ) {
 					scrollParent.scrollTop = scrolled = scrollParent.scrollTop - o.scrollSpeed;
 				}
 			}
 
 			if ( !o.axis || o.axis !== "y" ) {
 				if ( ( i.overflowOffset.left + scrollParent.offsetWidth ) - event.pageX <
 						o.scrollSensitivity ) {
 					scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft + o.scrollSpeed;
 				} else if ( event.pageX - i.overflowOffset.left < o.scrollSensitivity ) {
 					scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft - o.scrollSpeed;
 				}
 			}
 
 		} else {
 
 			if ( !o.axis || o.axis !== "x" ) {
 				if ( event.pageY - $( document ).scrollTop() < o.scrollSensitivity ) {
 					scrolled = $( document ).scrollTop( $( document ).scrollTop() - o.scrollSpeed );
 				} else if ( $( window ).height() - ( event.pageY - $( document ).scrollTop() ) <
 						o.scrollSensitivity ) {
 					scrolled = $( document ).scrollTop( $( document ).scrollTop() + o.scrollSpeed );
 				}
 			}
 
 			if ( !o.axis || o.axis !== "y" ) {
 				if ( event.pageX - $( document ).scrollLeft() < o.scrollSensitivity ) {
 					scrolled = $( document ).scrollLeft(
 						$( document ).scrollLeft() - o.scrollSpeed
 					);
 				} else if ( $( window ).width() - ( event.pageX - $( document ).scrollLeft() ) <
 						o.scrollSensitivity ) {
 					scrolled = $( document ).scrollLeft(
 						$( document ).scrollLeft() + o.scrollSpeed
 					);
 				}
 			}
 
 		}
 
 		if ( scrolled !== false && $.ui.ddmanager && !o.dropBehaviour ) {
 			$.ui.ddmanager.prepareOffsets( i, event );
 		}
 
 	}
 } );
 
 $.ui.plugin.add( "draggable", "snap", {
 	start: function( event, ui, i ) {
 
 		var o = i.options;
 
 		i.snapElements = [];
 
 		$( o.snap.constructor !== String ? ( o.snap.items || ":data(ui-draggable)" ) : o.snap )
 			.each( function() {
 				var $t = $( this ),
 					$o = $t.offset();
 				if ( this !== i.element[ 0 ] ) {
 					i.snapElements.push( {
 						item: this,
 						width: $t.outerWidth(), height: $t.outerHeight(),
 						top: $o.top, left: $o.left
 					} );
 				}
 			} );
 
 	},
 	drag: function( event, ui, inst ) {
 
 		var ts, bs, ls, rs, l, r, t, b, i, first,
 			o = inst.options,
 			d = o.snapTolerance,
 			x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
 			y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;
 
 		for ( i = inst.snapElements.length - 1; i >= 0; i-- ) {
 
 			l = inst.snapElements[ i ].left - inst.margins.left;
 			r = l + inst.snapElements[ i ].width;
 			t = inst.snapElements[ i ].top - inst.margins.top;
 			b = t + inst.snapElements[ i ].height;
 
 			if ( x2 < l - d || x1 > r + d || y2 < t - d || y1 > b + d ||
 					!$.contains( inst.snapElements[ i ].item.ownerDocument,
 					inst.snapElements[ i ].item ) ) {
 				if ( inst.snapElements[ i ].snapping ) {
 					( inst.options.snap.release &&
 						inst.options.snap.release.call(
 							inst.element,
 							event,
 							$.extend( inst._uiHash(), { snapItem: inst.snapElements[ i ].item } )
 						) );
 				}
 				inst.snapElements[ i ].snapping = false;
 				continue;
 			}
 
 			if ( o.snapMode !== "inner" ) {
 				ts = Math.abs( t - y2 ) <= d;
 				bs = Math.abs( b - y1 ) <= d;
 				ls = Math.abs( l - x2 ) <= d;
 				rs = Math.abs( r - x1 ) <= d;
 				if ( ts ) {
 					ui.position.top = inst._convertPositionTo( "relative", {
 						top: t - inst.helperProportions.height,
 						left: 0
 					} ).top;
 				}
 				if ( bs ) {
 					ui.position.top = inst._convertPositionTo( "relative", {
 						top: b,
 						left: 0
 					} ).top;
 				}
 				if ( ls ) {
 					ui.position.left = inst._convertPositionTo( "relative", {
 						top: 0,
 						left: l - inst.helperProportions.width
 					} ).left;
 				}
 				if ( rs ) {
 					ui.position.left = inst._convertPositionTo( "relative", {
 						top: 0,
 						left: r
 					} ).left;
 				}
 			}
 
 			first = ( ts || bs || ls || rs );
 
 			if ( o.snapMode !== "outer" ) {
 				ts = Math.abs( t - y1 ) <= d;
 				bs = Math.abs( b - y2 ) <= d;
 				ls = Math.abs( l - x1 ) <= d;
 				rs = Math.abs( r - x2 ) <= d;
 				if ( ts ) {
 					ui.position.top = inst._convertPositionTo( "relative", {
 						top: t,
 						left: 0
 					} ).top;
 				}
 				if ( bs ) {
 					ui.position.top = inst._convertPositionTo( "relative", {
 						top: b - inst.helperProportions.height,
 						left: 0
 					} ).top;
 				}
 				if ( ls ) {
 					ui.position.left = inst._convertPositionTo( "relative", {
 						top: 0,
 						left: l
 					} ).left;
 				}
 				if ( rs ) {
 					ui.position.left = inst._convertPositionTo( "relative", {
 						top: 0,
 						left: r - inst.helperProportions.width
 					} ).left;
 				}
 			}
 
 			if ( !inst.snapElements[ i ].snapping && ( ts || bs || ls || rs || first ) ) {
 				( inst.options.snap.snap &&
 					inst.options.snap.snap.call(
 						inst.element,
 						event,
 						$.extend( inst._uiHash(), {
 							snapItem: inst.snapElements[ i ].item
 						} ) ) );
 			}
 			inst.snapElements[ i ].snapping = ( ts || bs || ls || rs || first );
 
 		}
 
 	}
 } );
 
 $.ui.plugin.add( "draggable", "stack", {
 	start: function( event, ui, instance ) {
 		var min,
 			o = instance.options,
 			group = $.makeArray( $( o.stack ) ).sort( function( a, b ) {
 				return ( parseInt( $( a ).css( "zIndex" ), 10 ) || 0 ) -
 					( parseInt( $( b ).css( "zIndex" ), 10 ) || 0 );
 			} );
 
 		if ( !group.length ) { return; }
 
 		min = parseInt( $( group[ 0 ] ).css( "zIndex" ), 10 ) || 0;
 		$( group ).each( function( i ) {
 			$( this ).css( "zIndex", min + i );
 		} );
 		this.css( "zIndex", ( min + group.length ) );
 	}
 } );
 
 $.ui.plugin.add( "draggable", "zIndex", {
 	start: function( event, ui, instance ) {
 		var t = $( ui.helper ),
 			o = instance.options;
 
 		if ( t.css( "zIndex" ) ) {
 			o._zIndex = t.css( "zIndex" );
 		}
 		t.css( "zIndex", o.zIndex );
 	},
 	stop: function( event, ui, instance ) {
 		var o = instance.options;
 
 		if ( o._zIndex ) {
 			$( ui.helper ).css( "zIndex", o._zIndex );
 		}
 	}
 } );
 
 return $.ui.draggable;
 
 } ) );