/*

 * jQuery UI Draggable @VERSION

 *

 * Copyright (c) 2008 AUTHORS.txt (http://ui.jquery.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.cssNamespace && this.element.addClass(this.options.cssNamespace+"-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

		});



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

		if(o.cursorAt)

			this._adjustOffsetFromHelper(o.cursorAt);



		//Generate the original position

		this.originalPosition = this._generatePosition(event);



		//Set a containment if given in the options

		if(o.containment)

			this._setContainment();



		//Call plugins and callbacks

		this._propagate("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) this.position = this._propagate("drag", event) || this.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);



		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)

			var dropped = $.ui.ddmanager.drop(this, event);



		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._propagate("stop", event);

				self._clear();

			});

		} else {

			this._propagate("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() {



		this.offsetParent = this.helper.offsetParent(); var po = this.offsetParent.offset();			//Get the offsetParent and cache its position



		if((this.offsetParent[0] == document.body && $.browser.mozilla)	//Ugly FF3 fix

		|| (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.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.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),

			($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)

		];



		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) - this.offset.relative.left - this.offset.parent.left,

				co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top,

				co.left+(over ? Math.max(ce.scrollWidth,ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),

				co.top+(over ? Math.max(ce.scrollHeight,ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)

			];

		}



	},



	_convertPositionTo: function(d, pos) {



		if(!pos) pos = this.position;

		var mod = d == "absolute" ? 1 : -1;

		var scroll = this[(this.cssPosition == 'absolute' ? 'offset' : 'scroll')+'Parent'], scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);



		return {

			top: (

				pos.top																	// the calculated relative 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)

				+ ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod

				+ this.margins.top * mod												//Add the margin (you don't want the margin counting in intersection methods)

			),

			left: (

				pos.left																// the calculated relative 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)

				+ ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : ( scrollIsRootNode ? 0 : scroll.scrollLeft() ) ) * mod

				+ this.margins.left * mod												//Add the margin (you don't want the margin counting in intersection methods)

			)

		};

	},



	_generatePosition: function(event) {



		var o = this.options, scroll = this[(this.cssPosition == 'absolute' ? 'offset' : 'scroll')+'Parent'], scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);



		var position = {

			top: (

				event.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)

				+ ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) )

			),

			left: (

				event.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)

				+ ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() )

			)

		};



		if(!this.originalPosition) return position;										//If we are not dragging yet, we won't check for options



		/*

		 * - Position constraining -

		 * Constrain the position to a mix of grid, containment.

		 */

		if(this.containment) {

			if(position.left < this.containment[0]) position.left = this.containment[0];

			if(position.top < this.containment[1]) position.top = this.containment[1];

			if(position.left > this.containment[2]) position.left = this.containment[2];

			if(position.top > this.containment[3]) position.top = this.containment[3];

		}



		if(o.grid) {

			var top = this.originalPosition.top + Math.round((position.top - this.originalPosition.top) / o.grid[1]) * o.grid[1];

			position.top = this.containment ? (!(top < this.containment[1] || top > this.containment[3]) ? top : (!(top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;



			var left = this.originalPosition.left + Math.round((position.left - this.originalPosition.left) / o.grid[0]) * o.grid[0];

			position.left = this.containment ? (!(left < this.containment[0] || left > this.containment[2]) ? left : (!(left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;

		}



		return position;

	},



	_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



	_propagate: function(n, event) {

		$.ui.plugin.call(this, n, [event, this._uiHash()]);

		if(n == "drag") this.positionAbs = this._convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins

		return this.element.triggerHandler(n == "drag" ? n : "drag"+n, [event, this._uiHash()], this.options[n]);

	},



	plugins: {},



	_uiHash: function(event) {

		return {

			helper: this.helper,

			position: this.position,

			absolutePosition: this.positionAbs,

			options: this.options

		};

	}



}));



$.extend($.ui.draggable, {

	version: "@VERSION",

	defaults: {

		appendTo: "parent",

		axis: false,

		cancel: ":input",

		connectToSortable: false,

		containment: false,

		cssNamespace: "ui",

		cursor: "default",

		cursorAt: null,

		delay: 0,

		distance: 1,

		grid: false,

		handle: false,

		helper: "original",

		iframeFix: false,

		opacity: 1,

		refreshPositions: false,

		revert: false,

		revertDuration: 500,

		scope: "default",

		scroll: false,

		scrollSensitivity: 20,

		scrollSpeed: 20,

		snap: false,

		snapMode: "both",

		snapTolerance: 20,

		stack: false,

		zIndex: null

	}

});



$.ui.plugin.add("draggable", "connectToSortable", {

	start: function(event, ui) {



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

		inst.sortables = [];

		$(ui.options.connectToSortable).each(function() {

			// 'this' points to a string, and should therefore resolved as query, but instead, if the string is assigned to a variable, it loops through the strings properties,

			// so we have to append '' to make it anonymous again

			$(this+'').each(function() {

				if($.data(this, 'sortable')) {

					var sortable = $.data(this, 'sortable');

					inst.sortables.push({

						instance: sortable,

						shouldRevert: sortable.options.revert

					});

					sortable._refreshItems();	//Do a one-time refresh at start to refresh the containerCache

					sortable._propagate("activate", event, inst);

				}

			});

		});



	},

	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");



		$.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)

				if(this.shouldRevert) this.instance.options.revert = true; //revert here

				this.instance._mouseStop(event);



				//Also propagate receive event, since the sortable is actually receiving a element

				this.instance.element.triggerHandler("sortreceive", [event, $.extend(this.instance._ui(), { sender: inst.element })], this.instance.options["receive"]);



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

			} else {

				this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance

				this.instance._propagate("deactivate", event, inst);

			}



		});



	},

	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) {



			if(checkPos.call(inst, 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._propagate("toSortable", event);



				}



				//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;

					this.instance.options.revert = false; //No revert here

					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._propagate("fromSortable", event);

				}



			};



		});



	}

});



$.ui.plugin.add("draggable", "cursor", {

	start: function(event, ui) {

		var t = $('body');

		if (t.css("cursor")) ui.options._cursor = t.css("cursor");

		t.css("cursor", ui.options.cursor);

	},

	stop: function(event, ui) {

		if (ui.options._cursor) $('body').css("cursor", ui.options._cursor);

	}

});



$.ui.plugin.add("draggable", "iframeFix", {

	start: function(event, ui) {

		$(ui.options.iframeFix === true ? "iframe" : ui.options.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);

		if(t.css("opacity")) ui.options._opacity = t.css("opacity");

		t.css('opacity', ui.options.opacity);

	},

	stop: function(event, ui) {

		if(ui.options._opacity) $(ui.helper).css('opacity', ui.options._opacity);

	}

});



$.ui.plugin.add("draggable", "scroll", {

	start: function(event, ui) {

		var o = ui.options;

		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 o = ui.options, scrolled = false;

		var i = $(this).data("draggable");



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



			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((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(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(i, event);







		//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(scrolled !== false && i.cssPosition == 'absolute' && i.scrollParent[0] != document && $.ui.contains(i.scrollParent[0], i.offsetParent[0])) {

			i.offset.parent = i._getParentOffset();

		}



	}

});



$.ui.plugin.add("draggable", "snap", {

	start: function(event, ui) {



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

		inst.snapElements = [];



		$(ui.options.snap.constructor != String ? ( ui.options.snap.items || ':data(draggable)' ) : ui.options.snap).each(function() {

			var $t = $(this); var $o = $t.offset();

			if(this != inst.element[0]) inst.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");

		var d = ui.options.snapTolerance;



		var x1 = ui.absolutePosition.left, x2 = x1 + inst.helperProportions.width,

			y1 = ui.absolutePosition.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(ui.options.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;

				if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top;

				if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left;

				if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left;

			}



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



			if(ui.options.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;

				if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top;

				if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left;

				if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).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 group = $.makeArray($(ui.options.stack.group)).sort(function(a,b) {

			return (parseInt($(a).css("zIndex"),10) || ui.options.stack.min) - (parseInt($(b).css("zIndex"),10) || ui.options.stack.min);

		});



		$(group).each(function(i) {

			this.style.zIndex = ui.options.stack.min + i;

		});



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

	}

});



$.ui.plugin.add("draggable", "zIndex", {

	start: function(event, ui) {

		var t = $(ui.helper);

		if(t.css("zIndex")) ui.options._zIndex = t.css("zIndex");

		t.css('zIndex', ui.options.zIndex);

	},

	stop: function(event, ui) {

		if(ui.options._zIndex) $(ui.helper).css('zIndex', ui.options._zIndex);

	}

});



})(jQuery);