/* 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') 
{
	var 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", "/CSS/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)
{
	//alert('AddBottom(' + el.id + ', ' + 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)
{
	//alert('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";
    return;
}

function SameHeight(selector, maxh)
{
	var i, nc,  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);
			}
        }
    }
    return;
}

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]);
}