/*
 * jQuery UI Draggable 1.7
 *
 * 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/Draggables
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

 $.widget("ui.draggable", $.extend({}, $.ui.mouse, {

  _init: function() {

   if (this.options.helper == 'original' && !(/^(?:r|a|f)/).test(this.element.css("position")))
    this.element[0].style.position = 'relative';

   (this.options.addClasses && this.element.addClass("ui-draggable"));
   (this.options.disabled && this.element.addClass("ui-draggable-disabled"));

   this._mouseInit();

  },

  destroy: function() {
   if(!this.element.data('draggable')) return;
   this.element
   .removeData("draggable")
   .unbind(".draggable")
   .removeClass("ui-draggable"
    + " ui-draggable-dragging"
    + " ui-draggable-disabled");
   this._mouseDestroy();
  },

  _mouseCapture: function(event) {

   var o = this.options;

   if (this.helper || o.disabled || $(event.target).is('.ui-resizable-handle'))
    return false;

   //Quit if we're not on a valid handle
   this.handle = this._getHandle(event);
   if (!this.handle)
    return false;

   return true;

  },

  _mouseStart: function(event) {

   var o = this.options;

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

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

   //If ddmanager is used for droppables, set the global draggable
   if($.ui.ddmanager)
    $.ui.ddmanager.current = this;

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

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

   //Store the helper's css position
   this.cssPosition = this.helper.css("position");
   this.scrollParent = this.helper.scrollParent();

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

   $.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);

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

   //Call plugins and callbacks
   this._trigger("start", event);

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

   //Prepare the droppable offsets
   if ($.ui.ddmanager && !o.dropBehaviour)
    $.ui.ddmanager.prepareOffsets(this, event);

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

  _mouseDrag: function(event, noPropagation) {

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

   //Call plugins and callbacks and use the resulting position if something is returned
   if (!noPropagation) {
    var ui = this._uiHash();
    this._trigger('drag', event, ui);
    this.position = ui.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';
   if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);
   //alert(this.position.top);
   var hx = this.position.top;
   var lx = this.position.left;
   if(whx){
    var result=Math.round((hx-196)*100)/100 ;
    $(b).html(result);
    $(bi).attr('value', result);
    var result=Math.round((lx-58)*100)/100 ;
    $(l).html(result);
    $(li).attr('value', result);
   }else{
    var result=Math.round((hx)*100)/100 ;
    $(b).html(result);
    $(bi).attr('value', result);
    var result=Math.round((lx)*100)/100 ;
    $(l).html(result);
    $(li).attr('value', result);
   }
 
   return false;
  },

  _mouseStop: function(event) {

   //If we are using droppables, inform the manager about the drop
   var dropped = false;
   if ($.ui.ddmanager && !this.options.dropBehaviour)
    dropped = $.ui.ddmanager.drop(this, event);

   //if a drop comes from outside (a sortable)
   if(this.dropped) {
    dropped = this.dropped;
    this.dropped = false;
   }

   if((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) {
    var self = this;
    $(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function() {
     self._trigger("stop", event);
     self._clear();
    });
   } else {
    this._trigger("stop", event);
    this._clear();
   }

   return false;
  },

  _getHandle: function(event) {

   var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false;
   $(this.options.handle, this.element)
   .find("*")
   .andSelf()
   .each(function() {
    if(this == event.target) handle = true;
   });

   return handle;

  },

  _createHelper: function(event) {

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

   if(!helper.parents('body').length)
    helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo));

   if(helper[0] != this.element[0] && !(/(fixed|absolute)/).test(helper.css("position")))
    helper.css("position", "absolute");

   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") {
    //alert(this.scrollParent.scrollTop());
    var p = this.element.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.element.css("marginLeft"),10) || 0),
    top: (parseInt(this.element.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) && o.containment.constructor != Array) {
    var ce = $(o.containment)[0]; if(!ce) return;
    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
    ];
   } else if(o.containment.constructor == Array) {
    this.containment = o.containment;
   }

  },

  _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() ))
     )
   };

  },

  _clear: function() {
   this.helper.removeClass("ui-draggable-dragging");
   if(this.helper[0] != this.element[0] && !this.cancelHelperRemoval) this.helper.remove();
   //if($.ui.ddmanager) $.ui.ddmanager.current = null;
   this.helper = null;
   this.cancelHelperRemoval = false;
  },

  // From now on bulk stuff - mainly helpers

  _trigger: function(type, event, ui) {
   ui = ui || this._uiHash();
   $.ui.plugin.call(this, type, [event, ui]);
   if(type == "drag") this.positionAbs = this._convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins
   return $.widget.prototype._trigger.call(this, type, event, ui);
  },

  plugins: {},

  _uiHash: function(event) {
   return {
    helper: this.helper,
    position: this.position,
    absolutePosition: this.positionAbs, //deprecated
    offset: this.positionAbs
   };
  }

 }));

 $.extend($.ui.draggable, {
  version: "1.7",
  eventPrefix: "drag",
  defaults: {
   addClasses: true,
   appendTo: "parent",
   axis: false,
   cancel: ":input,option",
   connectToSortable: false,
   containment: false,
   cursor: "auto",
   cursorAt: false,
   delay: 0,
   distance: 1,
   grid: false,
   handle: false,
   helper: "original",
   iframeFix: false,
   opacity: false,
   refreshPositions: false,
   revert: false,
   revertDuration: 500,
   scope: "default",
   scroll: true,
   scrollSensitivity: 20,
   scrollSpeed: 20,
   snap: false,
   snapMode: "both",
   snapTolerance: 20,
   stack: false,
   zIndex: false
  }
 });

 $.ui.plugin.add("draggable", "connectToSortable", {
  start: function(event, ui) {

   var inst = $(this).data("draggable"), o = inst.options,
   uiSortable = $.extend({}, ui, {
    item: inst.element
   });
   inst.sortables = [];
   $(o.connectToSortable).each(function() {
    var sortable = $.data(this, 'sortable');
    if (sortable && !sortable.options.disabled) {
     inst.sortables.push({
      instance: sortable,
      shouldRevert: sortable.options.revert
     });
     sortable._refreshItems();	//Do a one-time refresh at start to refresh the containerCache
     sortable._trigger("activate", event, uiSortable);
    }
   });

  },
  stop: function(event, ui) {

   //If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
   var inst = $(this).data("draggable"),
   uiSortable = $.extend({}, ui, {
    item: inst.element
   });

   $.each(inst.sortables, function() {
    if(this.instance.isOver) {

     this.instance.isOver = 0;

     inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
     this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)

     //The sortable revert is supported, and we have to set a temporary dropped variable on the draggable to support revert: 'valid/invalid'
     if(this.shouldRevert) this.instance.options.revert = true;

     //Trigger the stop of the sortable
     this.instance._mouseStop(event);

     this.instance.options.helper = this.instance.options._helper;

     //If the helper has been the original item, restore properties in the sortable
     if(inst.options.helper == 'original')
      this.instance.currentItem.css({
       top: 'auto',
       left: 'auto'
      });

    } else {
     this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance
     this.instance._trigger("deactivate", event, uiSortable);
    }

   });

  },
  drag: function(event, ui) {

   var inst = $(this).data("draggable"), self = this;

   var checkPos = function(o) {
    var dyClick = this.offset.click.top, dxClick = this.offset.click.left;
    var helperTop = this.positionAbs.top, helperLeft = this.positionAbs.left;
    var itemHeight = o.height, itemWidth = o.width;
    var itemTop = o.top, itemLeft = o.left;

    return $.ui.isOver(helperTop + dyClick, helperLeft + dxClick, itemTop, itemLeft, itemHeight, itemWidth);
   };

   $.each(inst.sortables, function(i) {
			
    //Copy over some variables to allow calling the sortable's native _intersectsWith
    this.instance.positionAbs = inst.positionAbs;
    this.instance.helperProportions = inst.helperProportions;
    this.instance.offset.click = inst.offset.click;
			
    if(this.instance._intersectsWith(this.instance.containerCache)) {

     //If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
     if(!this.instance.isOver) {

      this.instance.isOver = 1;
      //Now we fake the start of dragging for the sortable instance,
      //by cloning the list group item, appending it to the sortable and using it as inst.currentItem
      //We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one)
      this.instance.currentItem = $(self).clone().appendTo(this.instance.element).data("sortable-item", true);
      this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it
      this.instance.options.helper = function() {
       return ui.helper[0];
      };

      event.target = this.instance.currentItem[0];
      this.instance._mouseCapture(event, true);
      this.instance._mouseStart(event, true, true);

      //Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
      this.instance.offset.click.top = inst.offset.click.top;
      this.instance.offset.click.left = inst.offset.click.left;
      this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left;
      this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top;

      inst._trigger("toSortable", event);
      inst.dropped = this.instance.element; //draggable revert needs that
      //hack so receive/update callbacks work (mostly)
      inst.currentItem = inst.element;
      this.instance.fromOutside = inst;

     }

     //Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable
     if(this.instance.currentItem) this.instance._mouseDrag(event);

    } else {

     //If it doesn't intersect with the sortable, and it intersected before,
     //we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval
     if(this.instance.isOver) {

      this.instance.isOver = 0;
      this.instance.cancelHelperRemoval = true;
					
      //Prevent reverting on this forced stop
      this.instance.options.revert = false;
					
      // The out event needs to be triggered independently
      this.instance._trigger('out', event, this.instance._uiHash(this.instance));
					
      this.instance._mouseStop(event, true);
      this.instance.options.helper = this.instance.options._helper;

      //Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
      this.instance.currentItem.remove();
      if(this.instance.placeholder) this.instance.placeholder.remove();

      inst._trigger("fromSortable", event);
      inst.dropped = false; //draggable revert needs that
     }

    };

   });

  }
 });

 $.ui.plugin.add("draggable", "cursor", {
  start: function(event, ui) {
   var t = $('body'), o = $(this).data('draggable').options;
   if (t.css("cursor")) o._cursor = t.css("cursor");
   t.css("cursor", o.cursor);
  },
  stop: function(event, ui) {
   var o = $(this).data('draggable').options;
   if (o._cursor) $('body').css("cursor", o._cursor);
  }
 });

 $.ui.plugin.add("draggable", "iframeFix", {
  start: function(event, ui) {
   var o = $(this).data('draggable').options;
   $(o.iframeFix === true ? "iframe" : o.iframeFix).each(function() {
    $('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
    .css({
     width: this.offsetWidth+"px",
     height: this.offsetHeight+"px",
     position: "absolute",
     opacity: "0.001",
     zIndex: 1000
    })
    .css($(this).offset())
    .appendTo("body");
   });
  },
  stop: function(event, ui) {
   $("div.ui-draggable-iframeFix").each(function() {
    this.parentNode.removeChild(this);
   }); //Remove frame helpers
  }
 });

 $.ui.plugin.add("draggable", "opacity", {
  start: function(event, ui) {
   var t = $(ui.helper), o = $(this).data('draggable').options;
   if(t.css("opacity")) o._opacity = t.css("opacity");
   t.css('opacity', o.opacity);
  },
  stop: function(event, ui) {
   var o = $(this).data('draggable').options;
   if(o._opacity) $(ui.helper).css('opacity', o._opacity);
  }
 });

 $.ui.plugin.add("draggable", "scroll", {
  start: function(event, ui) {
   var i = $(this).data("draggable");
   if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') i.overflowOffset = i.scrollParent.offset();
  },
  drag: function(event, ui) {

   var i = $(this).data("draggable"), o = i.options, scrolled = false;

   if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') {

    if(!o.axis || o.axis != 'x') {
     if((i.overflowOffset.top + i.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
      i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop + o.scrollSpeed;
     else if(event.pageY - i.overflowOffset.top < o.scrollSensitivity)
      i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop - o.scrollSpeed;
    }

    if(!o.axis || o.axis != 'y') {
     if((i.overflowOffset.left + i.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
      i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft + o.scrollSpeed;
     else if(event.pageX - i.overflowOffset.left < o.scrollSensitivity)
      i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft - o.scrollSpeed;
    }

   } else {

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

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

   }

   if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
    $.ui.ddmanager.prepareOffsets(i, event);

  }
 });

 $.ui.plugin.add("draggable", "snap", {
  start: function(event, ui) {

   var i = $(this).data("draggable"), o = i.options;
   i.snapElements = [];

   $(o.snap.constructor != String ? ( o.snap.items || ':data(draggable)' ) : o.snap).each(function() {
    var $t = $(this); var $o = $t.offset();
    if(this != i.element[0]) i.snapElements.push({
     item: this,
     width: $t.outerWidth(),
     height: $t.outerHeight(),
     top: $o.top,
     left: $o.left
    });
   });

  },
  drag: function(event, ui) {

   var inst = $(this).data("draggable"), o = inst.options;
   var d = o.snapTolerance;

   var x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
   y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;

   for (var i = inst.snapElements.length - 1; i >= 0; i--){

    var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width,
    t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;

    //Yes, I know, this is insane ;)
    if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) {
     if(inst.snapElements[i].snapping) (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), {
      snapItem: inst.snapElements[i].item
     })));
     inst.snapElements[i].snapping = false;
     continue;
    }

    if(o.snapMode != 'inner') {
     var ts = Math.abs(t - y2) <= d;
     var bs = Math.abs(b - y1) <= d;
     var ls = Math.abs(l - x2) <= d;
     var rs = Math.abs(r - x1) <= d;
     if(ts) ui.position.top = inst._convertPositionTo("relative", {
      top: t - inst.helperProportions.height,
      left: 0
     }).top - inst.margins.top;
     if(bs) ui.position.top = inst._convertPositionTo("relative", {
      top: b,
      left: 0
     }).top - inst.margins.top;
     if(ls) ui.position.left = inst._convertPositionTo("relative", {
      top: 0,
      left: l - inst.helperProportions.width
     }).left - inst.margins.left;
     if(rs) ui.position.left = inst._convertPositionTo("relative", {
      top: 0,
      left: r
     }).left - inst.margins.left;
    }

    var first = (ts || bs || ls || rs);

    if(o.snapMode != 'outer') {
     var ts = Math.abs(t - y1) <= d;
     var bs = Math.abs(b - y2) <= d;
     var ls = Math.abs(l - x1) <= d;
     var rs = Math.abs(r - x2) <= d;
     if(ts) ui.position.top = inst._convertPositionTo("relative", {
      top: t,
      left: 0
     }).top - inst.margins.top;
     if(bs) ui.position.top = inst._convertPositionTo("relative", {
      top: b - inst.helperProportions.height,
      left: 0
     }).top - inst.margins.top;
     if(ls) ui.position.left = inst._convertPositionTo("relative", {
      top: 0,
      left: l
     }).left - inst.margins.left;
     if(rs) ui.position.left = inst._convertPositionTo("relative", {
      top: 0,
      left: r - inst.helperProportions.width
     }).left - inst.margins.left;
    }

    if(!inst.snapElements[i].snapping && (ts || bs || ls || rs || first))
     (inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), {
      snapItem: inst.snapElements[i].item
     })));
    inst.snapElements[i].snapping = (ts || bs || ls || rs || first);

   };

  }
 });

 $.ui.plugin.add("draggable", "stack", {
  start: function(event, ui) {

   var o = $(this).data("draggable").options;

   var group = $.makeArray($(o.stack.group)).sort(function(a,b) {
    return (parseInt($(a).css("zIndex"),10) || o.stack.min) - (parseInt($(b).css("zIndex"),10) || o.stack.min);
   });

   $(group).each(function(i) {
    this.style.zIndex = o.stack.min + i;
   });

   this[0].style.zIndex = o.stack.min + group.length;

  }
 });

 $.ui.plugin.add("draggable", "zIndex", {
  start: function(event, ui) {
   var t = $(ui.helper), o = $(this).data("draggable").options;
   if(t.css("zIndex")) o._zIndex = t.css("zIndex");
   t.css('zIndex', o.zIndex);
  },
  stop: function(event, ui) {
   var o = $(this).data("draggable").options;
   if(o._zIndex) $(ui.helper).css('zIndex', o._zIndex);
  }
 });

})(jQuery);