//MooTools More, <http://mootools.net/more>. Copyright (c) 2006-2009 Aaron Newton <http://clientcide.com/>, Valerio Proietti <http://mad4milk.net> & the MooTools team <http://mootools.net/developers>, MIT Style License.

Drag.Move=new Class({Extends:Drag,options:{droppables:[],container:false,precalculate:false,includeMargins:true,checkDroppables:true},initialize:function(b,a){this.parent(b,a);b=this.element;this.droppables=$$(this.options.droppables);this.container=document.id(this.options.container);if(this.container&&$type(this.container)!="element"){this.container=document.id(this.container.getDocument().body)}var c=b.getStyles("left","top","position");if(c.left=="auto"||c.top=="auto"){b.setPosition(b.getPosition(b.getOffsetParent()))}if(c.position=="static"){b.setStyle("position","absolute")}this.addEvent("start",this.checkDroppables,true);this.overed=null},start:function(a){if(this.container){this.options.limit=this.calculateLimit()}if(this.options.precalculate){this.positions=this.droppables.map(function(b){return b.getCoordinates()})}this.parent(a)},calculateLimit:function(){var d=this.element.getOffsetParent(),g=this.container.getCoordinates(d),f={},c={},b={},i={},k={};["top","right","bottom","left"].each(function(o){f[o]=this.container.getStyle("border-"+o).toInt();b[o]=this.element.getStyle("border-"+o).toInt();c[o]=this.element.getStyle("margin-"+o).toInt();i[o]=this.container.getStyle("margin-"+o).toInt();k[o]=d.getStyle("padding-"+o).toInt()},this);var e=this.element.offsetWidth+c.left+c.right,n=this.element.offsetHeight+c.top+c.bottom,h=0,j=0,m=g.right-f.right-e,a=g.bottom-f.bottom-n;if(this.options.includeMargins){h+=c.left;j+=c.top}else{m+=c.right;a+=c.bottom}if(this.element.getStyle("position")=="relative"){var l=this.element.getCoordinates(d);l.left-=this.element.getStyle("left").toInt();l.top-=this.element.getStyle("top").toInt();h+=f.left-l.left;j+=f.top-l.top;m+=c.left-l.left;a+=c.top-l.top;if(this.container!=d){h+=i.left+k.left;j+=(Browser.Engine.trident4?0:i.top)+k.top}}else{h-=c.left;j-=c.top;if(this.container==d){m-=f.left;a-=f.top}else{h+=g.left+f.left;j+=g.top+f.top}}return{x:[h,m],y:[j,a]}},checkAgainst:function(c,b){c=(this.positions)?this.positions[b]:c.getCoordinates();var a=this.mouse.now;return(a.x>c.left&&a.x<c.right&&a.y<c.bottom&&a.y>c.top)},checkDroppables:function(){var a=this.droppables.filter(this.checkAgainst,this).getLast();if(this.overed!=a){if(this.overed){this.fireEvent("leave",[this.element,this.overed])}if(a){this.fireEvent("enter",[this.element,a])}this.overed=a}},drag:function(a){this.parent(a);if(this.options.checkDroppables&&this.droppables.length){this.checkDroppables()}},stop:function(a){this.checkDroppables();this.fireEvent("drop",[this.element,this.overed,a]);this.overed=null;return this.parent(a)}});Element.implement({makeDraggable:function(a){var b=new Drag.Move(this,a);this.store("dragger",b);return b}});