//EasyUI遮罩类EasyMask.js（继承自弹出层基类EasyLayer）
var easyMask = function(olayer,width,height,zindex,scolor,opacity,hs){
width = (!width||isNaN(width))?'100%':width;
height = (!height||isNaN(height))?'100%':height;
this.scolor = scolor||'#000';
this.opacity = isNaN(opacity)?30:opacity;//透明度
easyLayer.call(this,olayer,zindex,width,height);//继承弹出层
var count = 0;//引用计数
this.oncountchange = null;//事件：引用计数改变
this.getcount = function(){return count;};
this.clearcount = function(){count = 0;if(this.oncountchange&&this.oncountchange.constructor==Function){this.oncountchange();}};
this.addcount = function(){count++;if(this.oncountchange&&this.oncountchange.constructor==Function){this.oncountchange();}};
this.subcount = function(){count--;if(count<0){count = 0;}if(this.oncountchange&&this.oncountchange.constructor==Function){this.oncountchange();}};
this.init(hs);
};
easyMask.prototype = {
init:function(hs){
var dlayer = this.layer,xdde = document.documentElement,xdb = document.body,width = this.width,height = this.height;
dlayer.innerHTML = '
';
dlayer.oncontextmenu = function(){return false;};//屏蔽遮罩层右键
dlayer.onselectstart = function(){return false;};//屏蔽遮罩层选择
dlayer.onmousedown = function(){return false;};//屏蔽遮罩层鼠标按键
var resize = function(){//重绘遮罩大小
if(width!='100%'||height!='100%'){return;}//如果指定大小则不重绘
var rs = easyUI.getWindowSize();
var iwidth = Math.max(rs.width,rs.scrollWidth);
var iheight = Math.max(rs.height,rs.scrollHeight);
dlayer.style.width = iwidth+'px';
dlayer.style.height = iheight+'px';
};
if(document.attachEvent){window.attachEvent('onresize',resize);}else{window.addEventListener('resize',resize,false);}//窗体大小更改后重绘遮罩大小
//重写继承自easyLayer的open方法
var fooopold = this.open;
this.open = function(x,y){
this.addcount();//引用计数加1
if(this.getcount()>1){return false;}//如果已有其他元素引用了遮罩，则不再重新开启遮罩
if(hs){//开启时隐藏窗体滚动条
var msie = /msie/i.test(navigator.appVersion);
ist = Math.max(xdb.scrollTop,xdde.scrollTop);
document.documentElement.style.overflow = 'hidden';
if(msie){document.body.style.overflow = 'hidden';}
document.body.scrollTop = ist+1;
}
if(!x){x=0;}
if(!y){y=0;}
fooopold.call(this,x,y);
resize();
};
//重写继承自easyLayer的close方法
var fooclold = this.close;
this.close = function(){
this.subcount();//引用计数减1
if(this.getcount()>0){return false;}//如果还有其他元素引用了遮罩，则不关闭遮罩
if(hs){//开启时隐藏窗体滚动条
var msie = /msie/i.test(navigator.appVersion);
ist = Math.max(xdb.scrollTop,xdde.scrollTop);
document.documentElement.style.overflow = 'auto';
if(msie){document.body.style.overflow = 'auto';}
document.body.scrollTop = ist-1;
}
fooclold.call(this);
};
}
};