/*
 * jQuery UI Nested Sortable
 * v 2.1a / 2016-02-04
 * https://github.com/ilikenwf/nestedSortable
 *
 * Depends on:
 *   jquery.ui.sortable.js 1.10+
 *
 * Copyright (c) 2010-2016 Manuele J Sarfatti and contributors
 * Licensed under the MIT License
 * http://www.opensource.org/licenses/mit-license.php
 */
(function( factory ) {
  "use strict";

  if ( typeof define === "function" && define.amd ) {

    // AMD. Register as an anonymous module.
    define([
      "jquery",
      "jquery-ui/sortable"
    ], factory );
  } else {

    // Browser globals
    factory( window.jQuery );
  }
}(function($) {
  "use strict";

  function isOverAxis( x, reference, size ) {
    return ( x > reference ) && ( x < ( reference + size ) );
  }

  $.widget("mjs.nestedSortable", $.extend({}, $.ui.sortable.prototype, {

    options: {
      disableParentChange: false,
      doNotClear: false,
      expandOnHover: 700,
      isAllowed: function() { return true; },
      isTree: false,
      listType: "ol",
      maxLevels: 0,
      protectRoot: false,
      rootID: null,
      rtl: false,
      startCollapsed: false,
      tabSize: 20,

      branchClass: "mjs-nestedSortable-branch",
      collapsedClass: "mjs-nestedSortable-collapsed",
      disableNestingClass: "mjs-nestedSortable-no-nesting",
      errorClass: "mjs-nestedSortable-error",
      expandedClass: "mjs-nestedSortable-expanded",
      hoveringClass: "mjs-nestedSortable-hovering",
      leafClass: "mjs-nestedSortable-leaf",
      disabledClass: "mjs-nestedSortable-disabled"
    },

    _create: function() {
      var self = this,
        err;

      this.element.data("ui-sortable", this.element.data("mjs-nestedSortable"));

      // mjs - prevent browser from freezing if the HTML is not correct
      if (!this.element.is(this.options.listType)) {
        err = "nestedSortable: " +
          "Please check that the listType option is set to your actual list type";

        throw new Error(err);
      }

      // if we have a tree with expanding/collapsing functionality,
      // force 'intersect' tolerance method
      if (this.options.isTree && this.options.expandOnHover) {
        this.options.tolerance = "intersect";
      }

      $.ui.sortable.prototype._create.apply(this, arguments);

      // prepare the tree by applying the right classes
      // (the CSS is responsible for actual hide/show functionality)
      if (this.options.isTree) {
        $(this.items).each(function() {
          var $li = this.item,
            hasCollapsedClass = $li.hasClass(self.options.collapsedClass),
            hasExpandedClass = $li.hasClass(self.options.expandedClass);

          if ($li.children(self.options.listType).length) {
            $li.addClass(self.options.branchClass);
            // expand/collapse class only if they have children

            if ( !hasCollapsedClass && !hasExpandedClass ) {
              if (self.options.startCollapsed) {
                $li.addClass(self.options.collapsedClass);
              } else {
                $li.addClass(self.options.expandedClass);
              }
            }
          } else {
            $li.addClass(self.options.leafClass);
          }
        });
      }
    },

    _destroy: function() {
      this.element
        .removeData("mjs-nestedSortable")
        .removeData("ui-sortable");
      return $.ui.sortable.prototype._destroy.apply(this, arguments);
    },

    _mouseDrag: function(event) {
      var i,
        item,
        itemElement,
        intersection,
        self = this,
        o = this.options,
        scrolled = false,
        $document = $(document),
        previousTopOffset,
        parentItem,
        level,
        childLevels,
        itemAfter,
        itemBefore,
        newList,
        method,
        a,
        previousItem,
        nextItem,
        helperIsNotSibling;

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

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

      //Do scrolling
      if (this.options.scroll) {
        if (this.scrollParent[0] !== document && this.scrollParent[0].tagName !== "HTML") {

          if (
            (
              this.overflowOffset.top +
              this.scrollParent[0].offsetHeight
            ) -
            event.pageY <
            o.scrollSensitivity
          ) {
            scrolled = this.scrollParent.scrollTop() + o.scrollSpeed;
            this.scrollParent.scrollTop(scrolled);
          } else if (
            event.pageY -
            this.overflowOffset.top <
            o.scrollSensitivity
          ) {
            scrolled = this.scrollParent.scrollTop() - o.scrollSpeed;
            this.scrollParent.scrollTop(scrolled);
          }

          if (
            (
              this.overflowOffset.left +
              this.scrollParent[0].offsetWidth
            ) -
            event.pageX <
            o.scrollSensitivity
          ) {
            scrolled = this.scrollParent.scrollLeft() + o.scrollSpeed;
            this.scrollParent.scrollLeft(scrolled);
          } else if (
            event.pageX -
            this.overflowOffset.left <
            o.scrollSensitivity
          ) {
            scrolled = this.scrollParent.scrollLeft() - o.scrollSpeed;
            this.scrollParent.scrollLeft(scrolled);
          }

        } else {

          if (
            event.pageY -
            $document.scrollTop() <
            o.scrollSensitivity
          ) {
            scrolled = $document.scrollTop() - o.scrollSpeed;
            $document.scrollTop(scrolled);
          } else if (
            $(window).height() -
            (
              event.pageY -
              $document.scrollTop()
            ) <
            o.scrollSensitivity
          ) {
            scrolled = $document.scrollTop() + o.scrollSpeed;
            $document.scrollTop(scrolled);
          }

          if (
            event.pageX -
            $document.scrollLeft() <
            o.scrollSensitivity
          ) {
            scrolled = $document.scrollLeft() - o.scrollSpeed;
            $document.scrollLeft(scrolled);
          } else if (
            $(window).width() -
            (
              event.pageX -
              $document.scrollLeft()
            ) <
            o.scrollSensitivity
          ) {
            scrolled = $document.scrollLeft() + o.scrollSpeed;
            $document.scrollLeft(scrolled);
          }

        }

        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");

      // mjs - find the top offset before rearrangement,
      previousTopOffset = this.placeholder.offset().top;

      //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";
      }

      // mjs - check and reset hovering state at each cycle
      this.hovering = this.hovering ? this.hovering : null;
      this.mouseentered = this.mouseentered ? this.mouseentered : false;

      // mjs - let's start caching some variables
      (function() {
        var _parentItem = this.placeholder.parent().parent();
        if (_parentItem && _parentItem.closest(".ui-sortable").length) {
          parentItem = _parentItem;
        }
      }.call(this));

      level = this._getLevel(this.placeholder);
      childLevels = this._getChildLevels(this.helper);
      newList = document.createElement(o.listType);

      //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 form 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
        // beetween the outer and inner container.
        if (item.instance !== this.currentContainer) {
          continue;
        }

        // No action if intersected item is disabled
        // and the element above or below in the direction we're going is also disabled
        if (itemElement.className.indexOf(o.disabledClass) !== -1) {
          // Note: intersection hardcoded direction values from
          // jquery.ui.sortable.js:_intersectsWithPointer
          if (intersection === 2) {
            // Going down
            itemAfter = this.items[i + 1];
            if (itemAfter && itemAfter.item.hasClass(o.disabledClass)) {
              continue;
            }

          } else if (intersection === 1) {
            // Going up
            itemBefore = this.items[i - 1];
            if (itemBefore && itemBefore.item.hasClass(o.disabledClass)) {
              continue;
            }
          }
        }

        method = intersection === 1 ? "next" : "prev";

        // 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[method]()[0] !== itemElement &&
          !$.contains(this.placeholder[0], itemElement) &&
          (
            this.options.type === "semi-dynamic" ?
              !$.contains(this.element[0], itemElement) :
              true
          )
        ) {

          // mjs - we are intersecting an element:
          // trigger the mouseenter event and store this state
          if (!this.mouseentered) {
            $(itemElement).mouseenter();
            this.mouseentered = true;
          }

          // mjs - if the element has children and they are hidden,
          // show them after a delay (CSS responsible)
          if (o.isTree && $(itemElement).hasClass(o.collapsedClass) && o.expandOnHover) {
            if (!this.hovering) {
              $(itemElement).addClass(o.hoveringClass);
              this.hovering = window.setTimeout(function() {
                $(itemElement)
                  .removeClass(o.collapsedClass)
                  .addClass(o.expandedClass);

                self.refreshPositions();
                self._trigger("expand", event, self._uiHash());
              }, o.expandOnHover);
            }
          }

          this.direction = intersection === 1 ? "down" : "up";

          // mjs - rearrange the elements and reset timeouts and hovering state
          if (this.options.tolerance === "pointer" || this._intersectsWithSides(item)) {
            $(itemElement).mouseleave();
            this.mouseentered = false;
            $(itemElement).removeClass(o.hoveringClass);
            if (this.hovering) {
              window.clearTimeout(this.hovering);
            }
            this.hovering = null;

            // mjs - do not switch container if
            // it's a root item and 'protectRoot' is true
            // or if it's not a root item but we are trying to make it root
            if (o.protectRoot &&
              !(
                this.currentItem[0].parentNode === this.element[0] &&
                // it's a root item
                itemElement.parentNode !== this.element[0]
                // it's intersecting a non-root item
              )
            ) {
              if (this.currentItem[0].parentNode !== this.element[0] &&
                itemElement.parentNode === this.element[0]
              ) {

                if ( !$(itemElement).children(o.listType).length) {
                  itemElement.appendChild(newList);
                  if (o.isTree) {
                    $(itemElement)
                      .removeClass(o.leafClass)
                      .addClass(o.branchClass + " " + o.expandedClass);
                  }
                }

                if (this.direction === "down") {
                  a = $(itemElement).prev().children(o.listType);
                } else {
                  a = $(itemElement).children(o.listType);
                }

                if (a[0] !== undefined) {
                  this._rearrange(event, null, a);
                }

              } else {
                this._rearrange(event, item);
              }
            } else if (!o.protectRoot) {
              this._rearrange(event, item);
            }
          } else {
            break;
          }

          // Clear emtpy ul's/ol's
          this._clearEmpty(itemElement);

          this._trigger("change", event, this._uiHash());
          break;
        }
      }

      // mjs - to find the previous sibling in the list,
      // keep backtracking until we hit a valid list item.
      (function() {
        var _previousItem = this.placeholder.prev();
        if (_previousItem.length) {
          previousItem = _previousItem;
        } else {
          previousItem = null;
        }
      }.call(this));

      if (previousItem != null) {
        while (
          previousItem[0].nodeName.toLowerCase() !== "li" ||
          previousItem[0].className.indexOf(o.disabledClass) !== -1 ||
          previousItem[0] === this.currentItem[0] ||
          previousItem[0] === this.helper[0]
        ) {
          if (previousItem[0].previousSibling) {
            previousItem = $(previousItem[0].previousSibling);
          } else {
            previousItem = null;
            break;
          }
        }
      }

      // mjs - to find the next sibling in the list,
      // keep stepping forward until we hit a valid list item.
      (function() {
        var _nextItem = this.placeholder.next();
        if (_nextItem.length) {
          nextItem = _nextItem;
        } else {
          nextItem = null;
        }
      }.call(this));

      if (nextItem != null) {
        while (
          nextItem[0].nodeName.toLowerCase() !== "li" ||
          nextItem[0].className.indexOf(o.disabledClass) !== -1 ||
          nextItem[0] === this.currentItem[0] ||
          nextItem[0] === this.helper[0]
        ) {
          if (nextItem[0].nextSibling) {
            nextItem = $(nextItem[0].nextSibling);
          } else {
            nextItem = null;
            break;
          }
        }
      }

      this.beyondMaxLevels = 0;

      // mjs - if the item is moved to the left, send it one level up
      // but only if it's at the bottom of the list
      if (parentItem != null &&
        nextItem == null &&
        !(o.protectRoot && parentItem[0].parentNode == this.element[0]) &&
        (
          o.rtl &&
          (
            this.positionAbs.left +
            this.helper.outerWidth() > parentItem.offset().left +
            parentItem.outerWidth()
          ) ||
          !o.rtl && (this.positionAbs.left < parentItem.offset().left)
        )
      ) {

        parentItem.after(this.placeholder[0]);
        helperIsNotSibling = !parentItem
                      .children(o.listItem)
                      .children("li:visible:not(.ui-sortable-helper)")
                      .length;
        if (o.isTree && helperIsNotSibling) {
          parentItem
            .removeClass(this.options.branchClass + " " + this.options.expandedClass)
            .addClass(this.options.leafClass);
        }
                if(typeof parentItem !== 'undefined')
            this._clearEmpty(parentItem[0]);
        this._trigger("change", event, this._uiHash());
        // mjs - if the item is below a sibling and is moved to the right,
        // make it a child of that sibling
      } else if (previousItem != null &&
        !previousItem.hasClass(o.disableNestingClass) &&
        (
          previousItem.children(o.listType).length &&
          previousItem.children(o.listType).is(":visible") ||
          !previousItem.children(o.listType).length
        ) &&
        !(o.protectRoot && this.currentItem[0].parentNode === this.element[0]) &&
        (
          o.rtl &&
          (
            this.positionAbs.left +
            this.helper.outerWidth() <
            previousItem.offset().left +
            previousItem.outerWidth() -
            o.tabSize
          ) ||
          !o.rtl &&
          (this.positionAbs.left > previousItem.offset().left + o.tabSize)
        )
      ) {

        this._isAllowed(previousItem, level, level + childLevels + 1);

        if (!previousItem.children(o.listType).length) {
          previousItem[0].appendChild(newList);
          if (o.isTree) {
            previousItem
              .removeClass(o.leafClass)
              .addClass(o.branchClass + " " + o.expandedClass);
          }
        }

        // mjs - if this item is being moved from the top, add it to the top of the list.
        if (previousTopOffset && (previousTopOffset <= previousItem.offset().top)) {
          previousItem.children(o.listType).prepend(this.placeholder);
        } else {
          // mjs - otherwise, add it to the bottom of the list.
          previousItem.children(o.listType)[0].appendChild(this.placeholder[0]);
        }
                if(typeof parentItem !== 'undefined')
            this._clearEmpty(parentItem[0]);
        this._trigger("change", event, this._uiHash());
      } else {
        this._isAllowed(parentItem, level, 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) {
      // mjs - if the item is in a position not allowed, send it back
      if (this.beyondMaxLevels) {

        this.placeholder.removeClass(this.options.errorClass);

        if (this.domPosition.prev) {
          $(this.domPosition.prev).after(this.placeholder);
        } else {
          $(this.domPosition.parent).prepend(this.placeholder);
        }

        this._trigger("revert", event, this._uiHash());

      }

      // mjs - clear the hovering timeout, just to be sure
      $("." + this.options.hoveringClass)
        .mouseleave()
        .removeClass(this.options.hoveringClass);

      this.mouseentered = false;
      if (this.hovering) {
        window.clearTimeout(this.hovering);
      }
      this.hovering = null;

      this._relocate_event = event;
      this._pid_current = $(this.domPosition.parent).parent().attr("id");
      this._sort_current = this.domPosition.prev ? $(this.domPosition.prev).next().index() : 0;
      $.ui.sortable.prototype._mouseStop.apply(this, arguments); //asybnchronous execution, @see _clear for the relocate event.
    },

    // mjs - this function is slightly modified
    // to make it easier to hover over a collapsed element and have it expand
    _intersectsWithSides: function(item) {

      var half = this.options.isTree ? .8 : .5,
        isOverBottomHalf = isOverAxis(
          this.positionAbs.top + this.offset.click.top,
          item.top + (item.height * half),
          item.height
        ),
        isOverTopHalf = isOverAxis(
          this.positionAbs.top + this.offset.click.top,
          item.top - (item.height * half),
          item.height
        ),
        isOverRightHalf = 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" && isOverTopHalf)
        );
      }

    },

    _contactContainers: function() {

      if (this.options.protectRoot && this.currentItem[0].parentNode === this.element[0] ) {
        return;
      }

      $.ui.sortable.prototype._contactContainers.apply(this, arguments);

    },

    _clear: function() {
      var i,
        item;

      $.ui.sortable.prototype._clear.apply(this, arguments);

      //relocate event
      if (!(this._pid_current === this._uiHash().item.parent().parent().attr("id") &&
        this._sort_current === this._uiHash().item.index())) {
        this._trigger("relocate", this._relocate_event, this._uiHash());
      }

      // mjs - clean last empty ul/ol
      for (i = this.items.length - 1; i >= 0; i--) {
        item = this.items[i].item[0];
        this._clearEmpty(item);
      }

    },

    serialize: function(options) {

      var o = $.extend({}, this.options, options),
        items = this._getItemsAsjQuery(o && o.connected),
        str = [];

      $(items).each(function() {
        var res = ($(o.item || this).attr(o.attribute || "id") || "")
            .match(o.expression || (/(.+)[-=_](.+)/)),
          pid = ($(o.item || this).parent(o.listType)
            .parent(o.items)
            .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]) : o.rootID));
        }
      });

      if (!str.length && o.key) {
        str.push(o.key + "=");
      }

      return str.join("&");

    },

    toHierarchy: function(options) {

      var o = $.extend({}, this.options, options),
        ret = [];

      $(this.element).children(o.items).each(function() {
        var level = _recursiveItems(this);
        ret.push(level);
      });

      return ret;

      function _recursiveItems(item) {
        var id = ($(item).attr(o.attribute || "id") || "").match(o.expression || (/(.+)[-=_](.+)/)),
          currentItem;

        var data = $(item).data();
        if (data.nestedSortableItem) {
          delete data.nestedSortableItem; // Remove the nestedSortableItem object from the data
        }

        if (id) {
          currentItem = {
            "id": id[2]
          };

          currentItem = $.extend({}, currentItem, data); // Combine the two objects

          if ($(item).children(o.listType).children(o.items).length > 0) {
            currentItem.children = [];
            $(item).children(o.listType).children(o.items).each(function() {
              var level = _recursiveItems(this);
              currentItem.children.push(level);
            });
          }
          return currentItem;
        }
      }
    },

    toArray: function(options) {

      var o = $.extend({}, this.options, options),
        sDepth = o.startDepthCount || 0,
        ret = [],
        left = 1;

      if (!o.excludeRoot) {
        ret.push({
          "item_id": o.rootID,
          "parent_id": null,
          "depth": sDepth,
          "left": left,
          "right": ($(o.items, this.element).length + 1) * 2
        });
        left++;
      }

      $(this.element).children(o.items).each(function() {
        left = _recursiveArray(this, sDepth, left);
      });

      ret = ret.sort(function(a, b) { return (a.left - b.left); });

      return ret;

      function _recursiveArray(item, depth, _left) {

        var right = _left + 1,
          id,
          pid,
          parentItem;

        if ($(item).children(o.listType).children(o.items).length > 0) {
          depth++;
          $(item).children(o.listType).children(o.items).each(function() {
            right = _recursiveArray($(this), depth, right);
          });
          depth--;
        }

        id = ($(item).attr(o.attribute || "id") || "").match(o.expression || (/(.+)[-=_](.+)/));

        if (depth === sDepth) {
          pid = o.rootID;
        } else {
          parentItem = ($(item).parent(o.listType)
                      .parent(o.items)
                      .attr(o.attribute || "id"))
                      .match(o.expression || (/(.+)[-=_](.+)/));
          pid = parentItem[2];
        }

        if (id) {
          var data = $(item).children('div').data();
          var itemObj = $.extend( data, {
            "id":id[2],
            "parent_id":pid,
            "depth":depth,
            "left":_left,
            "right":right
            } );
          ret.push( itemObj );
        }

        _left = right + 1;
        return _left;
      }

    },

    _clearEmpty: function (item) {
      function replaceClass(elem, search, replace, swap) {
        if (swap) {
          search = [replace, replace = search][0];
        }

        $(elem).removeClass(search).addClass(replace);
      }

      var o = this.options,
        childrenList = $(item).children(o.listType),
        hasChildren = childrenList.has('li').length;

      var doNotClear =
        o.doNotClear ||
        hasChildren ||
        o.protectRoot && $(item)[0] === this.element[0];

      if (o.isTree) {
        replaceClass(item, o.branchClass, o.leafClass, doNotClear);
      }

      if (!doNotClear) {
        childrenList.parent().removeClass(o.expandedClass);
        childrenList.remove();
      }
    },

    _getLevel: function(item) {

      var level = 1,
        list;

      if (this.options.listType) {
        list = item.closest(this.options.listType);
        while (list && list.length > 0 && !list.is(".ui-sortable")) {
          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, level, levels) {
      var o = this.options,
        // this takes into account the maxLevels set to the recipient list
        maxLevels = this
          .placeholder
          .closest(".ui-sortable")
          .nestedSortable("option", "maxLevels"),

        // Check if the parent has changed to prevent it, when o.disableParentChange is true
        oldParent = this.currentItem.parent().parent(),
        disabledByParentchange = o.disableParentChange && (
          //From somewhere to somewhere else, except the root
          typeof parentItem !== 'undefined' && !oldParent.is(parentItem) ||
          typeof parentItem === 'undefined' && oldParent.is("li") //From somewhere to the root
        );
      // mjs - is the root protected?
      // mjs - are we nesting too deep?
      if (
        disabledByParentchange ||
        !o.isAllowed(this.placeholder, parentItem, this.currentItem)
      ) {
        this.placeholder.addClass(o.errorClass);
        if (maxLevels < levels && maxLevels !== 0) {
          this.beyondMaxLevels = levels - maxLevels;
        } else {
          this.beyondMaxLevels = 1;
        }
      } else {
        if (maxLevels < levels && maxLevels !== 0) {
          this.placeholder.addClass(o.errorClass);
          this.beyondMaxLevels = levels - maxLevels;
        } else {
          this.placeholder.removeClass(o.errorClass);
          this.beyondMaxLevels = 0;
        }
      }
    }

  }));

  $.mjs.nestedSortable.prototype.options = $.extend(
    {},
    $.ui.sortable.prototype.options,
    $.mjs.nestedSortable.prototype.options
  );
}));