/*
 * jQuery UI Draggable 1.8.5
 *
 * Copyright 2010, 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/Draggables
 *
 * Depends:
 *    jquery.ui.core.js
 *    jquery.ui.mouse.js
 *    jquery.ui.widget.js
 */
(function( $, undefined ) {

$.widget("ui.draggable", $.ui.mouse, {
    widgetEventPrefix: "drag",
    options: {
        addClasses: true,
        appendTo: "parent",
        axis: false,
        connectToSortable: false,
        containment: false,
        cursor: "auto",
        cursorAt: false,
        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
    },
    _create: 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();

        return this;
    },

    _mouseCapture: function(event) {

        var o = this.options;

        // among others, prevent a drag on a resizable-handle
        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.positionAbs = 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.position = 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));

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

        //Trigger event + callbacks
        if(this._trigger("start", event) === false) {
            this._clear();
            return false;
        }

        //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();
            if(this._trigger('drag', event, ui) === false) {
                this._mouseUp({});
                return false;
            }
            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);

        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 the original element is removed, don't bother to continue
        if(!this.element[0] || !this.element[0].parentNode)
            return 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() {
                if(self._trigger("stop", event) !== false) {
                    self._clear();
                }
            });
        } else {
            if(this._trigger("stop", event) !== false) {
                this._clear();
            }
        }

        return false;
    },
    
    cancel: function() {
        
        if(this.helper.is(".ui-draggable-dragging")) {
            this._mouseUp({});
        } else {
            this._clear();
        }
        
        return this;
        
    },

    _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 (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.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 && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod)
            ),
            left: (
                pos.left                                                                // The absolute mouse position
                + this.offset.relative.left * mod                                        // Only for relative positioned nodes: Relative offset from element to offset parent
                + this.offset.parent.left * mod                                            // The offsetParent's offset without borders (offset + border)
                - ($.browser.safari && $.browser.version < 526 && 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);
        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 && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ))
            ),
            left: (
                pageX                                                                // The absolute mouse position
                - this.offset.click.left                                                // Click offset (relative to the element)
                - this.offset.relative.left                                                // Only for relative positioned nodes: Relative offset from element to offset parent
                - this.offset.parent.left                                                // The offsetParent's offset without borders (offset + border)
                + ($.browser.safari && $.browser.version < 526 && 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,
            originalPosition: this.originalPosition,
            offset: this.positionAbs
        };
    }

});

$.extend($.ui.draggable, {
    version: "1.8.5"
});

$.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)).sort(function(a,b) {
            return (parseInt($(a).css("zIndex"),10) || 0) - (parseInt($(b).css("zIndex"),10) || 0);
        });
        if (!group.length) { return; }
        
        var min = parseInt(group[0].style.zIndex) || 0;
        $(group).each(function(i) {
            this.style.zIndex = min + i;
        });

        this[0].style.zIndex = 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);