/* 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","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(options.find("border")) AddBorder(v[i],options);
    if(top!="" || options.find("border")) AddTop(v[i],top,options);
    if(bottom!="" || options.find("border")) AddBottom(v[i],bottom,options);
    }
}

function AddBorder(el,options){
var i;
var bcl = getBdColor(el,"left");
var bcr = getBdColor(el,"right");
if(true && !el.addedBorder){
    var d=CreateEl("div");
    d.style.display="block";
    if(options.find("fixed-height"))
        d.style.height = el.offsetHeight;
    var firstElement = null;
    var lastElement = null;
    while(el.childNodes.length>0){
        var ch = el.firstChild;
        if ( ch.nodeType==1 ) {
            if (firstElement == null ) firstElement = ch;
            lastElement = ch;
            }
        d.appendChild(ch);
        }
    el.appendChild(d);
    d.style.borderLeft="1px solid "+bcl;
    d.style.borderRight="1px solid "+bcr;
    if (firstElement != null ) firstElement.style.marginTop = 0;
    if (lastElement != null ) lastElement.style.marginBottom = 0;
    }
if(false && !el.addedBorder){
    if(el.childNodes.length==0){
        var d=CreateEl("div");
        d.style.display="block";
        if(options.find("fixed-height"))
            d.style.height = el.offsetHeight;
        el.appendChild(d);
        }
    if(el.childNodes.length==1 && el.childNodes[0].nodeType==3){
        var t=el.firstChild.nodeValue;
        el.removeChild(el.lastChild);
        var d=CreateEl("span");
        d.style.display="block";
        if(options.find("fixed-height"))
            d.style.height = el.offsetHeight;
        d.appendChild(document.createTextNode(t));
        el.appendChild(d);
        }
    for(i=0;i<el.childNodes.length;i++){
        if(el.childNodes[i].nodeType==1){
            el.childNodes[i].style.borderLeft="1px solid "+bcl;
            el.childNodes[i].style.borderRight="1px solid "+bcr;
            }
        }
    }
el.addedBorder=true;
}

function AddTop(el,side,options){
if (!el.addedTop) {
    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")){
        if(options.find("border") && p<2) p+=2;
        d.style.marginBottom=(p-2)+"px";
        btype+="s"; lim=2;
        }
    else if(options.find("big")){
        if(options.find("border") && p<10) p+=10;
        d.style.marginBottom=(p-10)+"px";
        btype+="b"; lim=8;
        }
    else {
        if(options.find("border") && p<5) p+=5;
        d.style.marginBottom=(p-5)+"px";
    }
    for(i=1;i<=lim;i++)
        d.appendChild(CreateStrip(i,side,color,border,btype,options,el,"top"));
    el.style.paddingTop="0";
    el.insertBefore(d,el.firstChild);
    }    
el.addedTop=true;
}

function AddBottom(el,side,options){
if (!el.addedBottom) {
    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")){
        if(options.find("border") && p<2) p+=2;
        d.style.marginTop=(p-2)+"px";
        btype+="s"; lim=2;
        }
    else if(options.find("big")){
        if(options.find("border") && p<10) p+=10;
        d.style.marginTop=(p-10)+"px";
        btype+="b"; lim=8;
        }
    else {
        if(options.find("border") && p<5) p+=5;
        d.style.marginTop=(p-5)+"px";
    }
    for(i=lim;i>0;i--)
        d.appendChild(CreateStrip(i,side,color,border,btype,options,el,"bottom"));
    el.style.paddingBottom=0;
    el.appendChild(d);
    }
el.addedBottom=true;
}

function CreateStrip(index,side,color,border,btype,options,el,otherside){
var x=CreateEl("b");
var showBorder = options.find("border");
x.className=btype+index;
if(showBorder) {
    x.style.borderLeftColor = getBdColor(el, "left");
    x.style.borderRightColor = getBdColor(el, "right");
    if ( index==1 ) {
        x.style.backgroundColor=getBdColor(el, otherside);
    }
    else {
        x.style.backgroundColor=color;
    }
} 
else {
    x.style.borderColor=border;
    x.style.backgroundColor=color;
}
if(side=="left"){
    if ( !showBorder ) x.style.borderRightWidth="0";
    x.style.marginRight="0";
    }
else if(side=="right"){
    if ( !showBorder ) x.style.borderLeftWidth="0";
    x.style.marginLeft="0";
    }
else if(side!="both"){
    if ( !showBorder ) x.style.borderRightWidth="0";
    x.style.marginRight="0";
    if ( !showBorder ) 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,"background-color");
if(c==null || c=="transparent" || c.find("rgba(0, 0, 0, 0)"))
    return("transparent");
if(c.find("rgb")) c=rgb2hex(c);
return(c);
}

function getBdColor(x,side){
var c=getStyleProp(x,"border-"+side+"-color");
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){
return $(x).getStyle(prop);
}

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 c1RGB = new RGBColor(c1);
if ( c1RGB.ok ) {
    c1 = c1RGB.toHex();
}
var c2RGB = new RGBColor(c2);
if ( c2RGB.ok ) {
    c2 = c2RGB.toHex();
}
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]);
}

function initNiftyCorners()
{
    Element.addMethods({   
        niftyCorners: function(element, options) { 
            element = $(element);     
            Nifty( element.tagName+"#"+$(element).identify(), options );
            return element;   
       } 
    }); 
}

initNiftyCorners();