/**
 * justcorners.js 1.7 (28-Mar-2008)
 * (c) by Christian Effenberger 
 * All Rights Reserved
 * Source: corner.netzgesta.de
 * Distributed under Netzgestade Software License Agreement
 * http://www.netzgesta.de/cvi/LICENSE.txt
 * License permits free of charge
 * use on non-commercial and 
 * private web sites only 
**/


function roundedCorners(ctx,width,height,radius,lt,rt,lb,rb){
	ctx.beginPath(); ctx.moveTo(0,radius);
	if(lb==1) {ctx.lineTo(0,height-radius); ctx.quadraticCurveTo(0,height,radius,height); }else {ctx.lineTo(0,height); }
	if(rb==1) {ctx.lineTo(width-radius,height); ctx.quadraticCurveTo(width,height,width,height-radius); }else {ctx.lineTo(width,height); }
	if(rt==1) {ctx.lineTo(width,radius); ctx.quadraticCurveTo(width,0,width-radius,0); }else {ctx.lineTo(width,0); }		
	if(lt==1) {ctx.lineTo(radius,0); ctx.quadraticCurveTo(0,0,0,radius); }else {ctx.lineTo(0,0); }		
	ctx.closePath();
}



function parseCornerType(t)
{
	this.iradius = 16;
	this.iborder = 0;
	this.icolor = '0000ff';
	this.maxdim = 0;
	this.mindim = 0;
	this.tl = 1;
	this.tr = 1;
	this.bl = 1;
	this.br = 1;

	var j, tmp = '', classes = '';

	classes = t.split(' ');
	for(j=0;j<classes.length;j++) {
		if(classes[j].indexOf("iradius") == 0) {
			this.iradius = classes[j].substring(7);
		}else if(classes[j].indexOf("iborder") == 0) {
			this.iborder = classes[j].substring(7);
		}else if(classes[j].indexOf("icolor") == 0) {
			this.icolor = classes[j].substring(6);
		}else if(classes[j].indexOf("iradiae") == 0) {
			tmp = classes[j].substring(7);
			this.tl = (tmp.substr(0,1)!="1"?0:1);
			this.tr = (tmp.substr(1,1)!="1"?0:1);
			this.bl = (tmp.substr(2,1)!="1"?0:1);
			this.br = (tmp.substr(3,1)!="1"?0:1);
		}
	}
}

function _corner(obj, type)
{
	var image, object, canvas, context, classNames, classes = '';
	var maxdim = 0, mindim = 0, i, j, child, tmp = '', color;
	
	var t = new parseCornerType(type);
	image=obj;
	object = image.parentNode; 
	canvas = document.createElement('canvas');
//var canvas = excanvas(document.createElement("canvas")); // (+)

	canvas.className = image.className;
	canvas.style.cssText = image.style.cssText;
	canvas.style.height = image.height+'px';
	canvas.style.width = image.width+'px';
	canvas.height = image.height;
	canvas.width = image.width;
	canvas.src = image.src; canvas.alt = image.alt;
	if(image.id!='') canvas.id = image.id;
	if(image.title!='') canvas.title = image.title;
	if(image.getAttribute('onclick')!='') canvas.setAttribute('onclick',image.getAttribute('onclick'));
	maxdim = Math.min(canvas.width,canvas.height)/2;
	mindim = (t.iradius==0?16:t.iradius);
	t.iradius = Math.min(maxdim,mindim);
	t.iborder = Math.min(t.iborder*2,t.iradius);
	color = (t.icolor.match(/^[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]$/i)?t.icolor:color);
	context = canvas.getContext("2d");
	if(image.getAttribute("usemap")) {
		object.style.position = 'relative';
		object.style.height = image.height+'px';
		object.style.width = image.width+'px';
		canvas.left = 0; canvas.top = 0;
		canvas.style.position = 'absolute';
		canvas.style.left = 0 + 'px';
		canvas.style.top = 0 + 'px';
		image.left = 0; image.top = 0;
		image.style.position = 'absolute';
		image.style.height = image.height+'px';
		image.style.width = image.width+'px';
		image.style.left = 0 + 'px';
		image.style.top = 0 + 'px';
		image.style.opacity = 0;
		object.insertBefore(canvas,image);
	}else {
		object.replaceChild(canvas,image);
	}
	context.clearRect(0,0,canvas.width,canvas.height);
	//globalCompositeOperation = "source-in";
	roundedCorners(context,canvas.width,canvas.height,t.iradius,t.tl,t.tr,t.bl,t.br);
	context.clip();
	context.fillStyle = 'rgba(0,0,0,0)';
	context.fillRect(0,0,canvas.width,canvas.height);
	context.drawImage(image,0,0,canvas.width,canvas.height);
	if(t.iborder>0) {
		roundedCorners(context,canvas.width,canvas.height,t.iradius,t.tl,t.tr,t.bl,t.br);
		context.strokeStyle = '#'+color;
		context.lineWidth = t.iborder;
		context.stroke(); 
	}
	canvas.style.visibility = 'visible';

}

function _cornerIE(img, type)
{
	var image, object, canvas, context, classNames, classes = '', radius,  display, vml, flt;
	var maxdim = 0, mindim = 0, i, j, child, tmp = '', color, data;
	
	var t = new parseCornerType(type);
		
	image=img;
	object = image.parentNode; 

	maxdim = Math.min(image.width,image.height)/2;
	mindim = (t.iradius==0?16:t.iradius);
	radius = Math.min(maxdim,mindim);
	t.iborder = Math.min(t.iborder,2);
	color = (t.icolor.match(/^[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]$/i)?t.icolor:color);
	display = (image.currentStyle.display.toLowerCase()=='block')?'block':'inline-block';        
	vml = document.createElement(['<var style="zoom:1;overflow:hidden;display:' + display + ';width:' + image.width + 'px;height:' + image.height + 'px;padding:0;">'].join(''));
	flt =  image.currentStyle.styleFloat.toLowerCase();
	display = (flt=='left'||flt=='right')?'inline':display;
	var path = "m 0," + radius; 
	if(t.bl==1) {path += " l 0," + (image.height-radius) + " qy " + radius + "," + image.height;}else {path += " l 0," + image.height;}
	if(t.br==1) {path += " l " + (image.width-radius) + "," + image.height + " qx " + image.width + "," + (image.height-radius);}else {path += " l " + image.width + "," + image.height;}
	if(t.tr==1) {path += " l " + image.width + "," + radius + " qy " + (image.width-radius) + ",0";}else {path += " l " + image.width + ",0";}	
	if(t.tl==1) {path += " l " + radius + ",0 qx 0," + radius;}else {path += " l 0,0";}	
	path += " x e"; 
	data = '<v:shape strokeweight="'+t.iborder+'px" stroked="'+(t.iborder>0?"t":"f")+'" strokecolor="#'+color+'" filled="t" fillcolor="#ffffff" coordorigin="0,0" coordsize="' + image.width + ',' + image.height + '" path="' + path + '" style="zoom:1;margin:-1px 0 0 -1px;padding: 0;display:' + display + ';width:' + image.width + 'px;height:' + image.height + 'px;"><v:fill src="' + image.src + '" type="frame" /></v:shape>';

	vml.innerHTML = [data ].join('');
	vml.type='IMG';
	vml.className = image.className;
	vml.style.cssText = image.style.cssText;
	vml.style.visibility = 'visible';
	vml.src = image.src; 
	vml.alt = image.alt;

	if(object.tagName == 'A') //il parent è un link.. metti la manina
		vml.style.cursor = 'pointer';

	if(image.id!='') vml.id = image.id;
	if(image.title!='') vml.title = image.title;
	if(image.getAttribute('onclick')!='') vml.setAttribute('onclick',image.getAttribute('onclick'));

	image.insertAdjacentElement('BeforeBegin',vml); 

	if(image.getAttribute("usemap")) {
		object.style.position = 'relative';
		object.style.height = image.height+'px';
		object.style.width = image.width+'px';
		image.left = 0; image.top = 0;
		image.style.position = 'absolute';
		image.style.height = image.height+'px';
		image.style.width = image.width+'px';
		image.style.left = 0 + 'px';
		image.style.top = 0 + 'px';
		image.style.filter = "Alpha(opacity=0)";
	}else {
		image.style.display = 'none'; 
	}
}	
	

function cornerizeMe(img, t){
//alert('cornerizeMe');
	var tmp = navigator.appName == 'Microsoft Internet Explorer' && navigator.userAgent.indexOf('Opera') < 1 ? 1 : 0;
	var isIE = 0;
	try{
		if(tmp)  
			isIE= document.namespaces && !window.opera ? 1 : 0;
		if(isIE) {
			if(document.namespaces['v'] == null) {
				var stl = document.createStyleSheet();
				stl.addRule("v\\:*", "behavior: url(#default#VML);"); 
				document.namespaces.add("v", "urn:schemas-microsoft-com:vml"); 
			}
			_cornerIE(img, t);
		}	
		else {_corner(img, t);}
	}
	catch(err){
	//	alert('cornerizeMe catch! '+err);
	}

}