// (c) Juriy Zaytsev; kangax [at] gmail [dot] com; http://thinkweb2.com/projects/prototype/

if(Object.isUndefined(Proto)){var Proto={}}
Proto.Menu=Class.create({initialize:function(){var e=Prototype.emptyFunction;this.ie=Prototype.Browser.IE;this.options=Object.extend({selector:'.contextmenu',className:'protoMenu',pageOffset:25,fade:false,zIndex:100,beforeShow:e,beforeHide:e,beforeSelect:e},arguments[0]||{});this.shim=new Element('iframe',{style:'position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);display:none',src:'javascript:false;',frameborder:0});this.options.fade=this.options.fade&&!Object.isUndefined(Effect);this.container=new Element('div',{className:this.options.className,style:'display:none'});var list=new Element('ul');this.options.menuItems.each(function(item){list.insert(new Element('li',{className:item.separator?'separator':''}).insert(item.separator?'':Object.extend(new Element('a',{href:'#',title:item.name,className:(item.className||'')+(item.disabled?' disabled':' enabled')}),{_callback:item.callback}).observe('click',this.onClick.bind(this)).observe('contextmenu',Event.stop).update(item.name)))}.bind(this));$(document.body).insert(this.container.insert(list).observe('contextmenu',Event.stop));if(this.ie){$(document.body).insert(this.shim)}
document.observe('click',function(e){if(this.container.visible()&&!e.isRightClick()){this.options.beforeHide(e);if(this.ie)this.shim.hide();this.container.hide();}}.bind(this));$$(this.options.selector).invoke('observe',Prototype.Browser.Opera?'click':'contextmenu',function(e){if(Prototype.Browser.Opera&&!e.ctrlKey){return;}
this.show(e);}.bind(this));},show:function(e){e.stop();this.options.beforeShow(e);var x=Event.pointer(e).x,y=Event.pointer(e).y,vpDim=document.viewport.getDimensions(),vpOff=document.viewport.getScrollOffsets(),elDim=this.container.getDimensions(),elOff={left:((x+elDim.width+this.options.pageOffset)>vpDim.width?(vpDim.width-elDim.width-this.options.pageOffset):x)+'px',top:((y-vpOff.top+elDim.height)>vpDim.height&&(y-vpOff.top)>elDim.height?(y-elDim.height):y)+'px'};this.container.setStyle(elOff).setStyle({zIndex:this.options.zIndex});if(this.ie){this.shim.setStyle(Object.extend(Object.extend(elDim,elOff),{zIndex:this.options.zIndex-1})).show();}
this.options.fade?Effect.Appear(this.container,{duration:0.25}):this.container.show();this.event=e;},onClick:function(e){e.stop();if(e.target._callback&&!e.target.hasClassName('disabled')){this.options.beforeSelect(e);if(this.ie)this.shim.hide();this.container.hide();e.target._callback(this.event);}}})