app/jquery/jquery-ui.sortable.js
author Madhusudan.C.S <madhusudancs@gmail.com>
Mon, 05 Oct 2009 22:43:30 +0200
changeset 3017 6689a4c8f02e
parent 2749 4e2789b8e86d
permissions -rw-r--r--
Separated the publish and approve button on the Task list page for Org members. Also ensured that only tasks from the right org with the right status can be changed. And that we do not make unneccesary loops over values in the POST dict by grouping all the keys in the POST data under "task_id". The list entries also no longer redirect a user when clicking on the checkbox. Patch by: Madhusudan.C.S and Lennard de Rijk

/*
 * jQuery UI Sortable 1.7.2
 *
 * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Sortables
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

$.widget("ui.sortable", $.extend({}, $.ui.mouse, {
	_init: function() {

		var o = this.options;
		this.containerCache = {};
		this.element.addClass("ui-sortable");

		//Get the items
		this.refresh();

		//Let's determine if the items are floating
		this.floating = this.items.length ? (/left|right/).test(this.items[0].item.css('float')) : false;

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

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

	},

	destroy: function() {
		this.element
			.removeClass("ui-sortable ui-sortable-disabled")
			.removeData("sortable")
			.unbind(".sortable");
		this._mouseDestroy();

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

	_mouseCapture: function(event, overrideHandle) {

		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
		var currentItem = null, self = this, nodes = $(event.target).parents().each(function() {
			if($.data(this, 'sortable-item') == self) {
				currentItem = $(this);
				return false;
			}
		});
		if($.data(event.target, 'sortable-item') == self) currentItem = $(event.target);

		if(!currentItem) return false;
		if(this.options.handle && !overrideHandle) {
			var validHandle = false;

			$(this.options.handle, currentItem).find("*").andSelf().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 o = this.options, self = this;
		this.currentContainer = this;

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

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

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

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

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

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

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

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

		$.extend(this.offset, {
			click: { //Where the click happened, relative to the element
				left: event.pageX - this.offset.left,
				top: event.pageY - this.offset.top
			},
			parent: this._getParentOffset(),
			relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
		});

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

		//Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
		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();

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

		if(o.cursor) { // cursor option
			if ($('body').css("cursor")) this._storedCursor = $('body').css("cursor");
			$('body').css("cursor", o.cursor);
		}

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

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

		//Prepare scrolling
		if(this.scrollParent[0] != document && 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 (var i = this.containers.length - 1; i >= 0; i--) { this.containers[i]._trigger("activate", event, self._uiHash(this)); }
		}

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

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

		this.dragging = true;

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

	},

	_mouseDrag: function(event) {

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

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

		//Do scrolling
		if(this.options.scroll) {
			var o = this.options, scrolled = false;
			if(this.scrollParent[0] != document && 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 - $(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(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(this, event);
		}

		//Regenerate the absolute position used for position checks
		this.positionAbs = this._convertPositionTo("absolute");

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

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

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

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

			self.reverting = true;

			$(this.helper).animate({
				left: cur.left - this.offset.parent.left - self.margins.left + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft),
				top: cur.top - this.offset.parent.top - self.margins.top + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop)
			}, parseInt(this.options.revert, 10) || 500, function() {
				self._clear(event);
			});
		} else {
			this._clear(event, noPropagation);
		}

		return false;

	},

	cancel: function() {

		var self = this;

		if(this.dragging) {

			this._mouseUp();

			if(this.options.helper == "original")
				this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
			else
				this.currentItem.show();

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

		}

		//$(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 true;

	},

	serialize: function(o) {

		var items = this._getItemsAsjQuery(o && o.connected);
		var 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]));
		});

		return str.join('&');

	},

	toArray: function(o) {

		var items = this._getItemsAsjQuery(o && o.connected);
		var 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;

		var l = item.left,
			r = l + item.width,
			t = item.top,
			b = t + item.height;

		var dyClick = this.offset.click.top,
			dxClick = this.offset.click.left;

		var isOverElement = (y1 + dyClick) > t && (y1 + dyClick) < b && (x1 + dxClick) > l && (x1 + dxClick) < r;

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

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

		}
	},

	_intersectsWithPointer: function(item) {

		var isOverElementHeight = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top, item.height),
			isOverElementWidth = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left, item.width),
			isOverElement = isOverElementHeight && isOverElementWidth,
			verticalDirection = this._getDragVerticalDirection(),
			horizontalDirection = this._getDragHorizontalDirection();

		if (!isOverElement)
			return false;

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

	},

	_intersectsWithSides: function(item) {

		var isOverBottomHalf = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top + (item.height/2), item.height),
			isOverRightHalf = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left + (item.width/2), item.width),
			verticalDirection = this._getDragVerticalDirection(),
			horizontalDirection = this._getDragHorizontalDirection();

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

	},

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

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

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

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

		var self = this;
		var items = [];
		var queries = [];
		var connectWith = this._connectWith();

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

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

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

		return $(items);

	},

	_removeCurrentsFromItems: function() {

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

		for (var i=0; i < this.items.length; i++) {

			for (var j=0; j < list.length; j++) {
				if(list[j] == this.items[i].item[0])
					this.items.splice(i,1);
			};

		};

	},

	_refreshItems: function(event) {

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

		if(connectWith) {
			for (var i = connectWith.length - 1; i >= 0; i--){
				var cur = $(connectWith[i]);
				for (var j = cur.length - 1; j >= 0; j--){
					var inst = $.data(cur[j], 'sortable');
					if(inst && inst != this && !inst.options.disabled) {
						queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element[0], event, { item: this.currentItem }) : $(inst.options.items, inst.element), inst]);
						this.containers.push(inst);
					}
				};
			};
		}

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

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

				item.data('sortable-item', targetData); // Data for target checking (mouse manager)

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

	},

	refreshPositions: function(fast) {

		//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();
		}

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

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

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

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

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

		if(this.options.custom && this.options.custom.refreshContainers) {
			this.options.custom.refreshContainers.call(this);
		} else {
			for (var i = this.containers.length - 1; i >= 0; i--){
				var 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();
			};
		}

	},

	_createPlaceholder: function(that) {

		var self = that || this, o = self.options;

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

					var el = $(document.createElement(self.currentItem[0].nodeName))
						.addClass(className || self.currentItem[0].className+" ui-sortable-placeholder")
						.removeClass("ui-sortable-helper")[0];

					if(!className)
						el.style.visibility = "hidden";

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

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

					//If the element doesn't have a actual height by itself (without styles coming from a stylesheet), it receives the inline height from the dragged item
					if(!p.height()) { p.height(self.currentItem.innerHeight() - parseInt(self.currentItem.css('paddingTop')||0, 10) - parseInt(self.currentItem.css('paddingBottom')||0, 10)); };
					if(!p.width()) { p.width(self.currentItem.innerWidth() - parseInt(self.currentItem.css('paddingLeft')||0, 10) - parseInt(self.currentItem.css('paddingRight')||0, 10)); };
				}
			};
		}

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

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

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

	},

	_contactContainers: function(event) {
		for (var i = this.containers.length - 1; i >= 0; i--){

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

					if(this.currentContainer != this.containers[i]) {

						//When entering a new container, we will find the item with the least distance and append our item near it
						var dist = 10000; var itemWithLeastDistance = null; var base = this.positionAbs[this.containers[i].floating ? 'left' : 'top'];
						for (var j = this.items.length - 1; j >= 0; j--) {
							if(!$.ui.contains(this.containers[i].element[0], this.items[j].item[0])) continue;
							var cur = this.items[j][this.containers[i].floating ? 'left' : 'top'];
							if(Math.abs(cur - base) < dist) {
								dist = Math.abs(cur - base); itemWithLeastDistance = this.items[j];
							}
						}

						if(!itemWithLeastDistance && !this.options.dropOnEmpty) //Check if dropOnEmpty is enabled
							continue;

						this.currentContainer = this.containers[i];
						itemWithLeastDistance ? this._rearrange(event, itemWithLeastDistance, null, true) : this._rearrange(event, null, this.containers[i].element, true);
						this._trigger("change", event, this._uiHash());
						this.containers[i]._trigger("change", event, this._uiHash(this));

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

					}

					this.containers[i]._trigger("over", event, this._uiHash(this));
					this.containers[i].containerCache.over = 1;
				}
			} else {
				if(this.containers[i].containerCache.over) {
					this.containers[i]._trigger("out", event, this._uiHash(this));
					this.containers[i].containerCache.over = 0;
				}
			}

		};
	},

	_createHelper: function(event) {

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

		if(!helper.parents('body').length) //Add the helper to the DOM if that didn't happen already
			$(o.appendTo != 'parent' ? o.appendTo : this.currentItem[0].parentNode)[0].appendChild(helper[0]);

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

		if(helper[0].style.width == '' || o.forceHelperSize) helper.width(this.currentItem.width());
		if(helper[0].style.height == '' || o.forceHelperSize) helper.height(this.currentItem.height());

		return helper;

	},

	_adjustOffsetFromHelper: function(obj) {
		if(obj.left != undefined) this.offset.click.left = obj.left + this.margins.left;
		if(obj.right != undefined) this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
		if(obj.top != undefined) this.offset.click.top = obj.top + this.margins.top;
		if(obj.bottom != undefined) 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] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) {
			po.left += this.scrollParent.scrollLeft();
			po.top += this.scrollParent.scrollTop();
		}

		if((this.offsetParent[0] == document.body) //This needs to be actually done for all browsers, since pageX/pageY includes this information
		|| (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.browser.msie)) //Ugly IE fix
			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 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,
			$(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
			($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
		];

		if(!(/^(document|window|parent)$/).test(o.containment)) {
			var ce = $(o.containment)[0];
			var co = $(o.containment).offset();
			var over = ($(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;
		var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);

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

	},

	_generatePosition: function(event) {

		var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.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] != document && this.scrollParent[0] != this.offsetParent[0])) {
			this.offset.relative = this._getRelativeOffset();
		}

		var pageX = event.pageX;
		var pageY = event.pageY;

		/*
		 * - 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) {
				var 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;

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

		}

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

	},

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

		a ? a[0].appendChild(this.placeholder[0]) : i.item[0].parentNode.insertBefore(this.placeholder[0], (this.direction == 'down' ? i.item[0] : i.item[0].nextSibling));

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

		window.setTimeout(function() {
			if(counter == self.counter) self.refreshPositions(!hardRefresh); //Precompute after each DOM insertion, NOT on mousemove
		},0);

	},

	_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 delayedTriggers = [], self = this;

		// 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[0].parentNode) this.placeholder.before(this.currentItem);
		this._noFinalSort = null;

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

		if(this.fromOutside && !noPropagation) delayedTriggers.push(function(event) { this._trigger("receive", event, this._uiHash(this.fromOutside)); });
		if((this.fromOutside || this.domPosition.prev != this.currentItem.prev().not(".ui-sortable-helper")[0] || this.domPosition.parent != this.currentItem.parent()[0]) && !noPropagation) delayedTriggers.push(function(event) { this._trigger("update", event, this._uiHash()); }); //Trigger update callback if the DOM position has changed
		if(!$.ui.contains(this.element[0], this.currentItem[0])) { //Node was moved out of the current element
			if(!noPropagation) delayedTriggers.push(function(event) { this._trigger("remove", event, this._uiHash()); });
			for (var i = this.containers.length - 1; i >= 0; i--){
				if($.ui.contains(this.containers[i].element[0], this.currentItem[0]) && !noPropagation) {
					delayedTriggers.push((function(c) { return function(event) { c._trigger("receive", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
					delayedTriggers.push((function(c) { return function(event) { c._trigger("update", event, this._uiHash(this));  }; }).call(this, this.containers[i]));
				}
			};
		};

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

		//Do what was originally in plugins
		if(this._storedCursor) $('body').css("cursor", this._storedCursor); //Reset cursor
		if(this._storedOpacity) this.helper.css("opacity", this._storedOpacity); //Reset cursor
		if(this._storedZIndex) this.helper.css("zIndex", this._storedZIndex == 'auto' ? '' : this._storedZIndex); //Reset z-index

		this.dragging = false;
		if(this.cancelHelperRemoval) {
			if(!noPropagation) {
				this._trigger("beforeStop", event, this._uiHash());
				for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
				this._trigger("stop", event, this._uiHash());
			}
			return 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.helper[0] != this.currentItem[0]) this.helper.remove(); this.helper = null;

		if(!noPropagation) {
			for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
			this._trigger("stop", event, this._uiHash());
		}

		this.fromOutside = false;
		return true;

	},

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

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

}));

$.extend($.ui.sortable, {
	getter: "serialize toArray",
	version: "1.7.2",
	eventPrefix: "sort",
	defaults: {
		appendTo: "parent",
		axis: false,
		cancel: ":input,option",
		connectWith: false,
		containment: false,
		cursor: 'auto',
		cursorAt: false,
		delay: 0,
		distance: 1,
		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
	}
});

})(jQuery);