text: /*
   * jQuery UI Nested Sortable
   * v 1.3.4 / 28 apr 2011
   * http://mjsarfatti.com/sandbox/nestedSortable
   *
   * Depends:
   *	 jquery.ui.sortable.js 1.8+
   *
   * License CC BY-SA 3.0
   * Copyright 2010-2011, Manuele J Sarfatti
   */
  
  (function($) {
  
  	$.widget("ui.nestedSortable", $.extend({}, $.ui.sortable.prototype, {
  
  		options: {
  			tabSize: 20,
  			disableNesting: 'ui-nestedSortable-no-nesting',
  			errorClass: 'ui-nestedSortable-error',
  			listType: 'ol',
  			maxLevels: 0,
  			noJumpFix: 0
  		},
  
  		_create: function(){
  			if (this.noJumpFix == false)
  				this.element.height(this.element.height());
  			this.element.data('sortable', this.element.data('nestedSortable'));
  			return $.ui.sortable.prototype._create.apply(this, arguments);
  		},
  
  
  
  		_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
  					&&	!$.contains(this.placeholder[0], itemElement) //no action if the item moved is the parent of the item checked
  					&& (this.options.type == 'semi-dynamic' ? !$.contains(this.element[0], itemElement) : true)
  					//&& itemElement.parentNode == this.placeholder[0].parentNode // only rearrange items within the same container
  				) {
  
  					this.direction = intersection == 1 ? "down" : "up";
  
  					if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
  						this._rearrange(event, item);
  					} else {
  						break;
  					}
  
  					// Clear emtpy ul's/ol's
  					this._clearEmpty(itemElement);
  
  					this._trigger("change", event, this._uiHash());
  					break;
  				}
  			}
  
  			var parentItem = (this.placeholder[0].parentNode.parentNode && $(this.placeholder[0].parentNode.parentNode).closest('.ui-sortable').length) ? $(this.placeholder[0].parentNode.parentNode) : null;
  			var level = this._getLevel(this.placeholder);
  			var childLevels = this._getChildLevels(this.helper);
  			var previousItem = this.placeholder[0].previousSibling ? $(this.placeholder[0].previousSibling) : null;
  			if (previousItem != null) {
  				while (previousItem[0].nodeName.toLowerCase() != 'li' || previousItem[0] == this.currentItem[0]) {
  					if (previousItem[0].previousSibling) {
  						previousItem = $(previousItem[0].previousSibling);
  					} else {
  						previousItem = null;
  						break;
  					}
  				}
  			}
  
  			newList = document.createElement(o.listType);
  
  			this.beyondMaxLevels = 0;
  
  			// If the item is moved to the left, send it to its parent level
  			if (parentItem != null && this.positionAbs.left < parentItem.offset().left) {
  				parentItem.after(this.placeholder[0]);
  				this._clearEmpty(parentItem[0]);
  				this._trigger("change", event, this._uiHash());
  			}
  			// If the item is below another one and is moved to the right, make it a children of it
  			else if (previousItem != null && this.positionAbs.left > previousItem.offset().left + o.tabSize) {
  				this._isAllowed(previousItem, level+childLevels+1);
  				if (!previousItem.children(o.listType).length) {
  					previousItem[0].appendChild(newList);
  				}
  				previousItem.children(o.listType)[0].appendChild(this.placeholder[0]);
  				this._trigger("change", event, this._uiHash());
  			}
  			else {
  				this._isAllowed(parentItem, level+childLevels);
  			}
  
  			//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 the item is in a position not allowed, send it back
  			if (this.beyondMaxLevels) {
  				var parent = this.placeholder.parent().closest(this.options.items);
  				
  				for (var i = this.beyondMaxLevels - 1; i > 0; i--) {
  					parent = parent.parent().closest(this.options.items);
  				}
  
  				this.placeholder.removeClass(this.options.errorClass);
  				parent.after(this.placeholder);
  				this._trigger("change", event, this._uiHash());
  			}
  
  			$.ui.sortable.prototype._mouseStop.apply(this, arguments);
  
  		},
  
  		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 || (/(.+)[-=_](.+)/));
  				var pid = ($(o.item || this).parent(o.listType).parent('li').attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
  				if(res) str.push((o.key || res[1]+'['+(o.key && o.expression ? res[1] : res[2])+']')+'='+(pid ? (o.key && o.expression ? pid[1] : pid[2]) : '0'));
  			});
  
  			if(!str.length && o.key) {
  				str.push(o.key + '=');
  			}
  
  			return str.join('&');
  
  		},
  
  		toHierarchy: function(o) {
  
  			o = o || {};
  			var sDepth = o.startDepthCount || 0;
  			var ret = [];
  
  			$(this.element).children('li').each(function() {
  				var level = _recursiveItems($(this));
  				ret.push(level);
  			});
  
  			return ret;
  
  			function _recursiveItems(li) {
  				var id = ($(li).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
  				if (id != null) {
  					var item = {"id" : id[2]};
  					if ($(li).children(o.listType).children('li').length > 0) {
  						item.children = [];
  						$(li).children(o.listType).children('li').each(function () {
  							var level = _recursiveItems($(this));
  							item.children.push(level);
  						});
  					}
  					return item;
  				}
  			}
          },
  
  		toArray: function(o) {
  
  			o = o || {};
  			var sDepth = o.startDepthCount || 0;
  			var ret = [];
  			var left = 2;
  
  			ret.push({"item_id": 'root', "parent_id": 'none', "depth": sDepth, "left": '1', "right": ($('li', this.element).length + 1) * 2});
  
  			$(this.element).children('li').each(function () {
  				left = _recursiveArray(this, sDepth + 1, left);
  			});
  
  			function _sortByLeft(a,b) {
  				return a['left'] - b['left'];
  			}
  			ret = ret.sort(_sortByLeft);
  
  			return ret;
  
  			function _recursiveArray(item, depth, left) {
  
  				right = left + 1;
  
  				if ($(item).children(o.listType).children('li').length > 0) {
  					depth ++;
  					$(item).children(o.listType).children('li').each(function () {
  						right = _recursiveArray($(this), depth, right);
  					});
  					depth --;
  				}
  
  				id = ($(item).attr(o.attribute || 'id')).match(o.expression || (/(.+)[-=_](.+)/));
  
  				if (depth === sDepth + 1) pid = 'root';
  				else {
  					parentItem = ($(item).parent(o.listType).parent('li').attr('id')).match(o.expression || (/(.+)[-=_](.+)/));
  					pid = parentItem[2];
  				}
  
  				if (id != null) {
  						ret.push({"item_id": id[2], "parent_id": pid, "depth": depth, "left": left, "right": right});
  				}
  
  				return left = right + 1;
  			}
  
  		},
  
  		_clear: function(event, noPropagation) {
  
  			$.ui.sortable.prototype._clear.apply(this, arguments);
  
  			// Clean last empty ul/ol
  			for (var i = this.items.length - 1; i >= 0; i--) {
  				var item = this.items[i].item[0];
  				this._clearEmpty(item);
  			}
  			return true;
  
  		},
  
  		_clearEmpty: function(item) {
  
  			if (item.children[1] && item.children[1].children.length == 0) {
  				item.removeChild(item.children[1]);
  			}
  
  		},
  
  		_getLevel: function(item) {
  
  			var level = 1;
  
  			if (this.options.listType) {
  					var list = item.closest(this.options.listType);
  					while (!list.is('.ui-sortable')/* && level < this.options.maxLevels*/) {
  							level++;
  							list = list.parent().closest(this.options.listType);
  					}
  			}
  
  			return level;
  		},
  
  		_getChildLevels: function(parent, depth) {
  			var self = this,
  			    o = this.options,
  			    result = 0;
  			depth = depth || 0;
  
  			$(parent).children(o.listType).children(o.items).each(function (index, child) {
  					result = Math.max(self._getChildLevels(child, depth + 1), result);
  			});
  
  			return depth ? result + 1 : result;
  		},
  
  		_isAllowed: function(parentItem, levels) {
  			var o = this.options
  			// Are we trying to nest under a no-nest or are we nesting too deep?
  			if (parentItem == null || !(parentItem.hasClass(o.disableNesting))) {
  				if (o.maxLevels < levels && o.maxLevels != 0) {
  					this.placeholder.addClass(o.errorClass);
  					this.beyondMaxLevels = levels - o.maxLevels;
  				} else {
  					this.placeholder.removeClass(o.errorClass);
  					this.beyondMaxLevels = 0;
  				}
  			} else {
  				this.placeholder.addClass(o.errorClass);
  				if (o.maxLevels < levels && o.maxLevels != 0) {
  					this.beyondMaxLevels = levels - o.maxLevels;
  				} else {
  					this.beyondMaxLevels = 1;
  				}
  			}
  		}
  
  	}));
  
  	$.ui.nestedSortable.prototype.options = $.extend({}, $.ui.sortable.prototype.options, $.ui.nestedSortable.prototype.options);
  })(jQuery);