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var SparseTileLayerOverlay_tear=0;
var SparseTileLayerOverlay = function (){
if(!SparseTileLayerOverlay_tear)
{
this.tear();
return new SparseTileLayerOverlay();
}else
{
this.loop=0;
this.isActive=0;
}
}
SparseTileLayerOverlay.prototype.tear = function ()
{
SparseTileLayerOverlay_tear=1;
SparseTileLayerOverlay.prototype=new google.maps.OverlayView;
SparseTileLayerOverlay.prototype.setUrl=function(xy,z){return [];}
SparseTileLayerOverlay.prototype.loaded=function(e)
{
e=window.event ? window.event.srcElement : e.currentTarget;
e.loaded=1;
e.failed=0;
e.style.display="";
}
SparseTileLayerOverlay.prototype.failed=function(e)
{
e=window.event ? window.event.srcElement : e.currentTarget;
e.loaded=0;
e.failed=1;
e.style.display="none";
}
SparseTileLayerOverlay.prototype.idle=function(){
this.redraw();
}
SparseTileLayerOverlay.prototype.draw=function(){
this.redraw();
}
SparseTileLayerOverlay.prototype.show=function(){
this.isActive=1;
if(this.L)this.L.style.display='block';
}
SparseTileLayerOverlay.prototype.hide=function(){
this.isActive=0;
if(this.L)this.L.style.display='none';
}
SparseTileLayerOverlay.prototype.pushTo=function(e,a)
{
if (window.XMLHttpRequest)
{
e.style.display="none";
e.loaded=0;
e.failed=0;
e.onload =this.loaded;
e.onerror=this.failed;
e.src=a;
}
else
{
e.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+a+"',sizingMethod='scale')";
e.style.display="";
e.src=a;
}
}
SparseTileLayerOverlay.prototype.redraw=function()
{
try{
var a,b,c,d,e,f,g,h,i,j,k,l,o,p,q,r,s,t,u,v,w,x,y,z,iil;
var X$=0,Y$=0,X_=0,Y_=0,X0=0,X1=0,Y0=0,Y1=0;
var offset=268435456;
var radius=offset/Math.PI;
function LToX(x){return Math.round(offset+radius*x*Math.PI/180);}
function LToY(y){return Math.round(offset-radius*Math.log((1+Math.sin(y*Math.PI/180))/(1-Math.sin(y*Math.PI/180)))/2);}
function XToL(x){return ((Math.round(x)-offset)/radius)*180/Math.PI;}
function YToL(y){return (Math.PI/2-2*Math.atan(Math.exp((Math.round(y)-offset)/radius)))*180/Math.PI;}
function LLToXY(w,z){return {x:LToX(w.x)>>(21-z),y:LToY(w.y)>>(21-z)};}
function XYToLL(w,z){return {x:XToL(w.x<<(21-z)),y:YToL(w.y<<(21-z))};}
w=this.getMap();
u=this.getPanes();
if(!u || !u.overlayLayer)return;
v=this.getProjection();
if (!w) return;
if (!u) return;
if (!v) return;
l=w.getDiv();
q=w.getBounds();
c=w.getCenter();
z=w.getZoom();
w=8;
q={x:LToX(c.lng())>>(21-z),y:LToY(c.lat())>>(21-z)};
c=v.fromLatLngToDivPixel(c);
X0=q.x-((l.offsetWidth +1)>>1);
X1=q.x+((l.offsetWidth +1)>>1);
Y0=q.y-((l.offsetHeight+1)>>1);
Y1=q.y+((l.offsetHeight+1)>>1);
X$=q.x-c.x;
Y$=q.y-c.y;
X_=1+((X1-X0)>>w)+1;
Y_=1+((Y1-Y0)>>w)+1;
X0=X0>>w;
X1=X0+X_;
Y0=Y0>>w;
Y1=Y0+Y_;
if ((z!=this.Z) || (X$!=this.X$) || (Y$!=this.Y$) || (X_!=this.X_) || (Y_!=this.Y_))
{
l=this.L;
if (l)
{
for (i=l.childNodes.length-1;i+1;i--)
{
o=l.childNodes[i];
l.removeChild(o);
}
u.overlayLayer.removeChild(l);
l=null;
}
l=document.createElement("DIV");
l.style.display=this.isActive?"block":"none";
if (l)
{
u.overlayLayer.appendChild(l);
l.style.position="absolute";
for (i=0;X_*Y_-i;i++)
{
o=document.createElement("DIV");
l.appendChild(o);
o.style.position="absolute";
o.style.width=(1<<w);
o.style.height=(1<<w);
}
}
this.X$=X$;
this.Y$=Y$;
this.X_=X_;
this.Y_=Y_;
this.X0=0;
this.Y0=0;
this.X1=0;
this.Y1=0;
this.L=l;
this.Z=z;
}
if ((z!=this.Z)+(X0<this.X0)+(Y0<this.Y0)+(X1>this.X1)+(Y1>this.Y1))
{
//Post(X0+":"+X1+" "+Y0+":"+Y1);
l=this.L;
i=(0%X_)*Y_+(0%Y_);
var knownset;
var keep=0;
for (i=l.childNodes.length-1;i+1;i--){
e=l.childNodes[i];
e.used=0;
if(e.tileX>=X0 && e.tileX<X1 &&
e.tileY>=Y0 && e.tileY<Y1 )
{
e.used=1;
keep++;
}
}
//Post("keeped:"+keep+" of "+l.childNodes.length);
for (y=Y0;Y1-y;y++)
for (x=X0;X1-x;x++)
{
a=this.setUrl({x:x,y:y},z);
if (typeof(a)!="object") a=[a];
i=((x+X_)%X_)*Y_+((y+Y_)%Y_);
o=0;
for (iil=l.childNodes.length-1;iil+1;iil--){
o=l.childNodes[i];
if(o.tileX==x && o.tileY==y)break;
else o=0;
}
if(o)
{
o.used=1;
continue;
}
for (iil=l.childNodes.length-1;iil+1;iil--){
o=l.childNodes[i];
if(!o.used)break;else o=0;
}
if(!o)
{
//Post("not pass on "+iil+"::"+x+","+y);
break;
}
if(o.tileX==x && o.tileY==y)break;
o.used=1;
o.tileX=x;
o.tileY=y;
if (a.length!=o.childNodes.length)
{
for (i=o.childNodes.length-1;i+1;i--){
e=o.childNodes[i];
o.removeChild(e);
}
for (i=0;a[i];i++)
{
e=document.createElement(window.XMLHttpRequest ? "IMG" : "DIV");
o.appendChild(e);
}
}
//o.style.position="absolute";
//if (a.length!=o.childNodes.length)
for (i=0;a[i];i++)
{
e=o.childNodes[i];//document.createElement(window.XMLHttpRequest ? "IMG" : "DIV");
//o.appendChild(e);
//e.title=x+":"+y;
e.style.position="absolute";
e.style.left =0+"px";
e.style.top =0+"px";
e.style.width =(1<<w);
e.style.height=(1<<w);
this.pushTo(e,a[i]);
}
}
for (i=l.childNodes.length-1;i+1;i--){
o=l.childNodes[i];
o.style.left =((o.tileX<<w)-X$)+"px";
o.style.top =((o.tileY<<w)-Y$)+"px";
o.style.width =(1<<w)+"px";
o.style.height=(1<<w)+"px";
}
this.X0=X0;
this.Y0=Y0;
this.X1=X1;
this.Y1=Y1;
this.L=l;
this.Z=z;
}
this.loop++;
}catch(e){
}
}
}
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