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/*
 * 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);