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/*
	Copyright (c) 2004-2008, The Dojo Foundation All Rights Reserved.
	Available via Academic Free License >= 2.1 OR the modified BSD license.
	see: http://dojotoolkit.org/license for details
*/


if(!dojo._hasResource["dojo.dnd.Manager"]){dojo._hasResource["dojo.dnd.Manager"]=true;dojo.provide("dojo.dnd.Manager");dojo.require("dojo.dnd.common");dojo.require("dojo.dnd.autoscroll");dojo.require("dojo.dnd.Avatar");dojo.declare("dojo.dnd.Manager",null,{constructor:function(){this.avatar=null;this.source=null;this.nodes=[];this.copy=true;this.target=null;this.canDropFlag=false;this.events=[];},OFFSET_X:16,OFFSET_Y:16,overSource:function(_1){if(this.avatar){this.target=(_1&&_1.targetState!="Disabled")?_1:null;this.canDropFlag=Boolean(this.target);this.avatar.update();}dojo.publish("/dnd/source/over",[_1]);},outSource:function(_2){if(this.avatar){if(this.target==_2){this.target=null;this.canDropFlag=false;this.avatar.update();dojo.publish("/dnd/source/over",[null]);}}else{dojo.publish("/dnd/source/over",[null]);}},startDrag:function(_3,_4,_5){this.source=_3;this.nodes=_4;this.copy=Boolean(_5);this.avatar=this.makeAvatar();dojo.body().appendChild(this.avatar.node);dojo.publish("/dnd/start",[_3,_4,this.copy]);this.events=[dojo.connect(dojo.doc,"onmousemove",this,"onMouseMove"),dojo.connect(dojo.doc,"onmouseup",this,"onMouseUp"),dojo.connect(dojo.doc,"onkeydown",this,"onKeyDown"),dojo.connect(dojo.doc,"onkeyup",this,"onKeyUp")];var c="dojoDnd"+(_5?"Copy":"Move");dojo.addClass(dojo.body(),c);},canDrop:function(_7){var _8=Boolean(this.target&&_7);if(this.canDropFlag!=_8){this.canDropFlag=_8;this.avatar.update();}},stopDrag:function(){dojo.removeClass(dojo.body(),"dojoDndCopy");dojo.removeClass(dojo.body(),"dojoDndMove");dojo.forEach(this.events,dojo.disconnect);this.events=[];this.avatar.destroy();this.avatar=null;this.source=this.target=null;this.nodes=[];},makeAvatar:function(){return new dojo.dnd.Avatar(this);},updateAvatar:function(){this.avatar.update();},onMouseMove:function(e){var a=this.avatar;if(a){dojo.dnd.autoScrollNodes(e);var s=a.node.style;s.left=(e.pageX+this.OFFSET_X)+"px";s.top=(e.pageY+this.OFFSET_Y)+"px";var _c=Boolean(this.source.copyState(dojo.dnd.getCopyKeyState(e)));if(this.copy!=_c){this._setCopyStatus(_c);}}},onMouseUp:function(e){if(this.avatar&&(!("mouseButton" in this.source)||(dojo.isSafari&&dojo.dnd._isMac&&this.source.mouseButton==2?e.button==0:this.source.mouseButton==e.button))){if(this.target&&this.canDropFlag){var _e=Boolean(this.source.copyState(dojo.dnd.getCopyKeyState(e))),_f=[this.source,this.nodes,_e,this.target];dojo.publish("/dnd/drop/before",_f);dojo.publish("/dnd/drop",_f);}else{dojo.publish("/dnd/cancel");}this.stopDrag();}},onKeyDown:function(e){if(this.avatar){switch(e.keyCode){case dojo.keys.CTRL:var _11=Boolean(this.source.copyState(true));if(this.copy!=_11){this._setCopyStatus(_11);}break;case dojo.keys.ESCAPE:dojo.publish("/dnd/cancel");this.stopDrag();break;}}},onKeyUp:function(e){if(this.avatar&&e.keyCode==dojo.keys.CTRL){var _13=Boolean(this.source.copyState(false));if(this.copy!=_13){this._setCopyStatus(_13);}}},_setCopyStatus:function(_14){this.copy=_14;this.source._markDndStatus(this.copy);this.updateAvatar();dojo.removeClass(dojo.body(),"dojoDnd"+(this.copy?"Move":"Copy"));dojo.addClass(dojo.body(),"dojoDnd"+(this.copy?"Copy":"Move"));}});dojo.dnd._manager=null;dojo.dnd.manager=function(){if(!dojo.dnd._manager){dojo.dnd._manager=new dojo.dnd.Manager();}return dojo.dnd._manager;};}
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