WebAdventure/web/deps/opt/jquery.ui.sortable.js

/*!
 * jQuery UI Sortable 1.8.20
 *
 * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Sortables
 *
 * Depends:
 *  jquery.ui.core.js
 *  jquery.ui.mouse.js
 *  jquery.ui.widget.js
 */
(function( $, undefined ) {

$.widget("ui.sortable", $.ui.mouse, {
  widgetEventPrefix: "sort",
  ready: false,
  options: {
    appendTo: "parent",
    axis: false,
    connectWith: false,
    containment: false,
    cursor: 'auto',
    cursorAt: false,
    dropOnEmpty: true,
    forcePlaceholderSize: false,
    forceHelperSize: false,
    grid: false,
    handle: false,
    helper: "original",
    items: '> *',
    opacity: false,
    placeholder: false,
    revert: false,
    scroll: true,
    scrollSensitivity: 20,
    scrollSpeed: 20,
    scope: "default",
    tolerance: "intersect",
    zIndex: 1000
  },
  _create: function() {

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

    //Get the items
    this.refresh();

    //Let's determine if the items are being displayed horizontally
    this.floating = this.items.length ? o.axis === 'x' || (/left|right/).test(this.items[0].item.css('float')) || (/inline|table-cell/).test(this.items[0].item.css('display')) : false;

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

    //Initialize mouse events for interaction
    this._mouseInit();
    
    //We're ready to go
    this.ready = true

  },

  destroy: function() {
    $.Widget.prototype.destroy.call( this );
    this.element
      .removeClass("ui-sortable ui-sortable-disabled");
    this._mouseDestroy();

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

    return this;
  },

  _setOption: function(key, value){
    if ( key === "disabled" ) {
      this.options[ key ] = value;
  
      this.widget()
        [ value ? "addClass" : "removeClass"]( "ui-sortable-disabled" );
    } else {
      // Don't call widget base _setOption for disable as it adds ui-state-disabled class
      $.Widget.prototype._setOption.apply(this, arguments);
    }
  },

  _mouseCapture: function(event, overrideHandle) {
    var that = this;

    if (this.reverting) {
      return false;
    }

    if(this.options.disabled || this.options.type == 'static') return false;

    //We have to refresh the items data once first
    this._refreshItems(event);

    //Find out if the clicked node (or one of its parents) is a actual item in this.items
    var currentItem = null, self = this, nodes = $(event.target).parents().each(function() {
      if($.data(this, that.widgetName + '-item') == self) {
        currentItem = $(this);
        return false;
      }
    });
    if($.data(event.target, that.widgetName + '-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
    (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)
        //&& 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;
        }

        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({ target: null });

      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;
        }
      }

    }

    if (this.placeholder) {
      //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately, it unbinds ALL events from the original node!
      if(this.placeholder[0].parentNode) this.placeholder[0].parentNode.removeChild(this.placeholder[0]);
      if(this.options.helper != "original" && this.helper && this.helper[0].parentNode) this.helper.remove();

      $.extend(this, {
        helper: null,
        dragging: false,
        reverting: false,
        _noFinalSort: null
      });

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

    return this;

  },

  serialize: function(o) {

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

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

    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 = (this.options.axis === 'x') || $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top, item.height),
      isOverElementWidth = (this.options.axis === 'y') || $.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();
    return this;
  },

  _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 = $.data(cur[j], this.widgetName);
          if(inst && inst != this && !inst.options.disabled) {
            queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element).not(".ui-sortable-helper").not('.ui-sortable-placeholder'), 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").not('.ui-sortable-placeholder'), 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(" + this.widgetName + "-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 && this.ready) { //Shouldn't be run the first time through due to massive slow-down
      for (var i = connectWith.length - 1; i >= 0; i--){
        var cur = $(connectWith[i]);
        for (var j = cur.length - 1; j >= 0; j--){
          var inst = $.data(cur[j], this.widgetName);
          if(inst && inst != this && !inst.options.disabled) {
            queries.push([$.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(this.widgetName + '-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();
      };
    }

    return this;
  },

  _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) {
    
    // get innermost container that intersects with item 
    var innermostContainer = null, innermostIndex = null;   
    
    
    for (var i = this.containers.length - 1; i >= 0; i--){

      // never consider a container that's located within the item itself 
      if($.ui.contains(this.currentItem[0], this.containers[i].element[0]))
        continue;

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

        // if we've already found a container and it's more "inner" than this, then continue 
        if(innermostContainer && $.ui.contains(this.containers[i].element[0], innermostContainer.element[0]))
          continue;

        innermostContainer = this.containers[i]; 
        innermostIndex = i;
          
      } else {
        // container doesn't intersect. trigger "out" event if necessary 
        if(this.containers[i].containerCache.over) {
          this.containers[i]._trigger("out", event, this._uiHash(this));
          this.containers[i].containerCache.over = 0;
        }
      }

    }
    
    // if no intersecting containers found, return 
    if(!innermostContainer) return; 

    // move the item into the container if it's not there already
    if(this.containers.length === 1) {
      this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
      this.containers[innermostIndex].containerCache.over = 1;
    } else if(this.currentContainer != this.containers[innermostIndex]) { 

      //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[innermostIndex].floating ? 'left' : 'top']; 
      for (var j = this.items.length - 1; j >= 0; j--) { 
        if(!$.ui.contains(this.containers[innermostIndex].element[0], this.items[j].item[0])) continue; 
        var cur = this.items[j][this.containers[innermostIndex].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 
        return; 

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

      //Update the placeholder 
      this.options.placeholder.update(this.currentContainer, this.placeholder); 
    
      this.containers[innermostIndex]._trigger("over", event, this._uiHash(this)); 
      this.containers[innermostIndex].containerCache.over = 1;
    } 
  
    
  },

  _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 (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;
    }
  },

  _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.parent().length) 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 opacity
    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,
      originalPosition: self.originalPosition,
      offset: self.positionAbs,
      item: self.currentItem,
      sender: inst ? inst.element : null
    };
  }

});

$.extend($.ui.sortable, {
  version: "1.8.20"
});

})(jQuery);