/* 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", "http://www.newfaithchurch.org/dev/ui/css/niftyCorners.css"); // Might require absolute path reference
	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]);
}