/* Nifty Corners Cube - rounded corners with CSS and Javascript
Copyright 2006 Alessandro Fulciniti (a.fulciniti@html.it)

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
	
	var niftyOk=(document.getElementById && document.createElement && Array.prototype.push);
	var niftyCss=false;
	
	String.prototype.find=function(what){
		return(this.indexOf(what)>=0 ? true : false);
	}
	
	var oldonload=window.onload;
	if(typeof(NiftyLoad)!='function') 
		NiftyLoad=function(){};
	if(typeof(oldonload)=='function')
		window.onload=function(){oldonload();AddCss();NiftyLoad()};
	else 
		window.onload=function(){AddCss();NiftyLoad()};
	
	function AddCss(){
		niftyCss=true;
		var l=CreateEl("link");
		l.setAttribute("type","text/css");
		l.setAttribute("rel","stylesheet");
		l.setAttribute("href","/style/default/niftyCorners.css");
		l.setAttribute("media","screen");
		document.getElementsByTagName("head")[0].appendChild(l);
	}
	
	function Nifty(selector,options){
		if(niftyOk==false) 
			return;
		if(niftyCss==false) 
			AddCss();
		var i,v=selector.split(","),h=0;
		if(options==null) 
			options="";
		if(options.find("fixed-height"))
			h=getElementsBySelector(v[0])[0].offsetHeight;
		for(i=0;i<v.length;i++)
			Rounded(v[i],options);
		if(options.find("height")) 
			SameHeight(selector,h);
	}
	
	function Rounded(selector,options){
		var i,top="",bottom="",v=new Array();
		if(options!="") {
			options=options.replace("left","tl bl");
			options=options.replace("right","tr br");
			options=options.replace("top","tr tl");
			options=options.replace("bottom","br bl");
			options=options.replace("transparent","alias");
			if(options.find("tl")){
				top="both";
				if(!options.find("tr")) 
					top="left";
			}
			else if(options.find("tr")) 
				top="right";
					
			if(options.find("bl")){
				bottom="both";
				if(!options.find("br")) bottom="left";
			}
			else if(options.find("br")) bottom="right";
			}
		
		if(top=="" && bottom=="" && !options.find("none")){
			top="both";
			bottom="both";
		}
		v=getElementsBySelector(selector);
		for(i=0;i<v.length;i++){
			FixIE(v[i]);
			if(top!="") AddTop(v[i],top,options);
			if(bottom!="") AddBottom(v[i],bottom,options);
		}
	}
	
	function AddTop(el,side,options){
		var d=CreateEl("b"),lim=4,border="",p,i,btype="r",bk,color;
		d.style.marginLeft="-"+getPadding(el,"Left")+"px";
		d.style.marginRight="-"+getPadding(el,"Right")+"px";
		if(options.find("alias") || (color=getBk(el))=="transparent"){
			color="transparent";
			bk="transparent"; 
			border=getParentBk(el);
			btype="t";
		}
		else {
			bk=getParentBk(el); border=Mix(color,bk);
		}
		d.style.background=bk;
		d.className="niftycorners";
		p=getPadding(el,"Top");
		if(options.find("small")){
			d.style.marginBottom=(p-2)+"px";
			btype+="s"; 
			lim=2;
		}
		else if(options.find("big")) {
			d.style.marginBottom=(p-10)+"px";
			btype+="b"; 
			lim=8;
		}
		else d.style.marginBottom=(p-5)+"px";
		for(i=1;i<=lim;i++)
			d.appendChild(CreateStrip(i,side,color,border,btype));
		el.style.paddingTop="0";
		el.insertBefore(d,el.firstChild);
	}
	
	function AddBottom(el,side,options){
		var d=CreateEl("b"),lim=4,border="",p,i,btype="r",bk,color;
		d.style.marginLeft="-"+getPadding(el,"Left")+"px";
		d.style.marginRight="-"+getPadding(el,"Right")+"px";
		if(options.find("alias") || (color=getBk(el))=="transparent"){
			color="transparent";
			bk="transparent"; 
			border=getParentBk(el);
			btype="t";
		}
		else{
			bk=getParentBk(el); 
			border=Mix(color,bk);
		}
		d.style.background=bk;
		d.className="niftycorners";
		p=getPadding(el,"Bottom");
		if(options.find("small")){
			d.style.marginTop=(p-2)+"px";
			btype+="s"; 
			lim=2;
			}
		else if(options.find("big")){
			d.style.marginTop=(p-10)+"px";
			btype+="b"; 
			lim=8;
			}
		else d.style.marginTop=(p-5)+"px";
		for(i=lim;i>0;i--)
			d.appendChild(CreateStrip(i,side,color,border,btype));
		el.style.paddingBottom=0;
		el.appendChild(d);
	}
		
	function CreateStrip(index,side,color,border,btype){
		var x=CreateEl("b");
		x.className=btype+index;
		x.style.backgroundColor=color;
		x.style.borderColor=border;
		if(side=="left"){
			x.style.borderRightWidth="0";
			x.style.marginRight="0";
			}
		else if(side=="right"){
			x.style.borderLeftWidth="0";
			x.style.marginLeft="0";
			}
		return(x);
	}
	
	function CreateEl(x){
		return(document.createElement(x));
	}
	
	function FixIE(el){
		if(el.currentStyle!=null && el.currentStyle.hasLayout!=null && el.currentStyle.hasLayout==false)
			el.style.display="inline-block";
	}
		
	function SameHeight(selector,maxh){
		var i,v=selector.split(","),t,j,els=[],gap;
		for(i=0;i<v.length;i++) {
			t=getElementsBySelector(v[i]);
			els=els.concat(t);
		}
		for(i=0;i<els.length;i++) {
			if(els[i].offsetHeight>maxh) maxh=els[i].offsetHeight;
			els[i].style.height="auto";
		}
		for(i=0;i<els.length;i++){
			gap=maxh-els[i].offsetHeight;
			if(gap>0){
				t=CreateEl("b");
				t.className="niftyfill";
				t.style.height=gap+"px";
				nc=els[i].lastChild;
				if(nc.className=="niftycorners")
					els[i].insertBefore(t,nc);
				else els[i].appendChild(t);
			}
		}
	}
	
	function getElementsBySelector(selector){
		var i,j,selid="",selclass="",tag=selector,tag2="",v2,k,f,a,s=[],objlist=[],c;
		if(selector.find("#")){ //id selector like "tag#id"
			if(selector.find(" ")){  //descendant selector like "tag#id tag"
				s=selector.split(" ");
				var fs=s[0].split("#");
				if(fs.length==1) return(objlist);
				f=document.getElementById(fs[1]);
				if(f){
					v=f.getElementsByTagName(s[1]);
					for(i=0;i<v.length;i++) objlist.push(v[i]);
				}
				return(objlist);
			}
			else{
				s=selector.split("#");
				tag=s[0];
				selid=s[1];
				if(selid!=""){
					f=document.getElementById(selid);
					if(f) objlist.push(f);
					return(objlist);
				}
			}
		}
		if(selector.find(".")){      //class selector like "tag.class"
			s=selector.split(".");
			tag=s[0];
			selclass=s[1];
			if(selclass.find(" ")){   //descendant selector like tag1.classname tag2
				s=selclass.split(" ");
				selclass=s[0];
				tag2=s[1];
			}
		}
		var v=document.getElementsByTagName(tag);  // tag selector like "tag"
		if(selclass==""){
			for(i=0;i<v.length;i++) 
				objlist.push(v[i]);
			return(objlist);
		}
		for(i=0;i<v.length;i++){
			c=v[i].className.split(" ");
			for(j=0;j<c.length;j++){
				if(c[j]==selclass){
					if(tag2=="") 
						objlist.push(v[i]);
					else{
						v2=v[i].getElementsByTagName(tag2);
						for(k=0;k<v2.length;k++) objlist.push(v2[k]);
					}
				}
			}
		}
		return(objlist);
	}
	
	function getParentBk(x){
		var el=x.parentNode,c;
		while(el.tagName.toUpperCase()!="HTML" && (c=getBk(el))=="transparent")
			el=el.parentNode;
		if(c=="transparent") 
			c="#FFFFFF";
		return(c);
	}
	
	function getBk(x){
		var c=getStyleProp(x,"backgroundColor");
		if(c==null || c=="transparent" || c.find("rgba(0, 0, 0, 0)"))
			return("transparent");
		if(c.find("rgb")) 
			c=rgb2hex(c);
		return(c);
	}
	
	function getPadding(x,side){
		var p=getStyleProp(x,"padding"+side);
		if(p==null || !p.find("px")) 
			return(0);
		return(parseInt(p));
	}
	
	function getStyleProp(x,prop){
		if(x.currentStyle)
			return(x.currentStyle[prop]);
		if(document.defaultView.getComputedStyle)
			return(document.defaultView.getComputedStyle(x,'')[prop]);
		return(null);
	}
	
	function rgb2hex(value){
		var hex="",v,h,i;
		var regexp=/([0-9]+)[, ]+([0-9]+)[, ]+([0-9]+)/;
		var h=regexp.exec(value);
		for(i=1;i<4;i++){
			v=parseInt(h[i]).toString(16);
			if(v.length==1) 
				hex+="0"+v;
			else hex+=v;
		}
		return("#"+hex);
	}
	
	function Mix(c1,c2){
		var i,step1,step2,x,y,r=new Array(3);
		
		if(c1.length==4)
			step1=1;
		else 
			step1=2;

		if(c2.length==4) 
			step2=1;
		else 
			step2=2;
			
		for(i=0;i<3;i++){
			x=parseInt(c1.substr(1+step1*i,step1),16);
			if(step1==1) x=16*x+x;
			y=parseInt(c2.substr(1+step2*i,step2),16);
			if(step2==1) y=16*y+y;
			r[i]=Math.floor((x*50+y*50)/100);
			r[i]=r[i].toString(16);
			if(r[i].length==1) r[i]="0"+r[i];
		}
		return("#"+r[0]+r[1]+r[2]);
	}