function $S(v) { return($(v).style); }
function agent(v) { return(Math.max(navigator.userAgent.toLowerCase().indexOf(v),0)); }
function toggle(v) { $S(v).visibility=($S(v).visibility=='hidden'?'visible':'hidden'); }
function within(v,a,z) { return((v>=a && v<=z)?true:false); }
function XY(e,v) { var z=agent('msie')?[event.clientX+document.body.scrollLeft,event.clientY+document.body.scrollTop]:[e.pageX,e.pageY]; return(z[zero(v)]); }
function XYwin(v) { var z=agent('msie')?[document.body.clientHeight,document.body.clientWidth]:[window.innerHeight,window.innerWidth]; return(!isNaN(v)?z[v]:z); }
function zero(v) { v=parseInt(v); return(!isNaN(v)?v:0); }

/* PLUGIN */

var maxValue={'h':360,'s':100,'v':100}, HSV={0:360,1:100,2:100};
var hSV=165, wSV=162, hH=163, slideHSV={0:360,1:100,2:100}, zINDEX=15, stop=1;

var currentPicker = null;
var undoColor = null;

function showColorPicker(e)
{
	var mouseCoords = mouseCoordinates(e);
	
	currentPicker = getEventSource(e);
	
	var pickerPosition = getOffsetPosition(currentPicker);
	
	$S('plugin').left = pickerPosition.x + currentPicker.offsetWidth + "px";
	$S('plugin').top = pickerPosition.y + currentPicker.offsetHeight + "px";
	
	$S('plugin').visibility = 'visible';
	
	unclip($('plugin'));
}

function HSVslide(d,o,e) {

	function tXY(e) { tY=XY(e,1)-top; tX=XY(e)-left; }
	function mkHSV(a,b,c) { return(Math.min(a,Math.max(0,Math.ceil((parseInt(c)/b)*a)))); }
	function ckHSV(a,b) { if(within(a,0,b)) return(a); else if(a>b) return(b); else if(a<0) return('-'+oo); }
	function drag(e) { if(!stop) { if(d!='drag') tXY(e);
	
		if(d=='SVslide') { ds.left=ckHSV(tX-oo,wSV)+'px'; ds.top=ckHSV(tY-oo,wSV)+'px';
		
			slideHSV[1]=mkHSV(100,wSV,ds.left); slideHSV[2]=100-mkHSV(100,wSV,ds.top); HSVupdate();

		}
		else if(d=='Hslide') { var ck=ckHSV(tY-oo,hH), j, r='hsv', z={};
		
			ds.top=(ck-5)+'px'; slideHSV[0]=mkHSV(360,hH,ck);
 
			for(var i=0; i<=r.length-1; i++) { j=r.substr(i,1); z[i]=(j=='h')?maxValue[j]-mkHSV(maxValue[j],hH,ck):HSV[i]; }

			HSVupdate(z); $S('SV').backgroundColor='#'+hsv2hex([HSV[0],100,100]);

		}
		else if(d=='drag') { ds.left=XY(e)+oX-eX+'px'; ds.top=XY(e,1)+oY-eY+'px'; }

	}}

	if(stop) { stop=''; var ds=$S(d!='drag'?d:o);

		if(d=='drag') { var oX=parseInt(ds.left), oY=parseInt(ds.top), eX=XY(e), eY=XY(e,1); $S(o).zIndex=zINDEX++; }
		else { var left=($(o).offsetLeft+10), top=($(o).offsetTop+22), tX, tY, oo=(d=='Hslide')?2:4; if(d=='SVslide') slideHSV[0]=HSV[0]; }

		document.onmousemove=drag; 
		document.onmouseup=function(){ 
			stop=1; 
			document.onmousemove=''; 
			document.onmouseup=''; 
		}; 
		drag(e);

	}
}

function pickerInputFocus(pickerInputId)
{
	undoColor = $(pickerInputId).value;
}

function parseColorFromInput(pickerId)
{
	var newValue = $(pickerId + '_input').value;

	if(!/^[a-f0-9]{6}$/i.test(newValue))
	{
		$(pickerId + '_input').value = newValue = undoColor;
	}
	RGBupdate(pickerId, newValue);
}

function HSVupdate(v) { 
	v=hsv2hex(HSV=v?v:slideHSV);
	RGBupdate(currentPicker.id, v);
}

function RGBupdate(pickerId, v) { 
	$('plugHEX').innerHTML=v;
	$S('plugCUR').background='#'+v;

	wizard.setColor(pickerId, v);
	
	return(v);

}

function loadSV() { 
	var z='';

	for(var i=hSV; i>=0; i--) 
		z+="<div style=\"BACKGROUND: #"+hsv2hex([Math.round((360/hSV)*i),100,100])+";\"><br /><\/div>";
	
	$('Hmodel').innerHTML=z;
	
}

/* CONVERSIONS */

function toHex(v) { v=Math.round(Math.min(Math.max(0,v),255)); return("0123456789ABCDEF".charAt((v-v%16)/16)+"0123456789ABCDEF".charAt(v%16)); }
function rgb2hex(r) { return(toHex(r[0])+toHex(r[1])+toHex(r[2])); }
function hsv2hex(h) { return(rgb2hex(hsv2rgb(h))); }	

function hsv2rgb(r) { // easyrgb.com/math.php?MATH=M21#text21

    var R,B,G,S=r[1]/100,V=r[2]/100,H=r[0]/360;

    if(S>0) { if(H>=1) H=0;

        var H=6*H; F=H-Math.floor(H);
        var A=Math.round(255*V*(1.0-S));
        var B=Math.round(255*V*(1.0-(S*F)));
        var C=Math.round(255*V*(1.0-(S*(1.0-F))));
        var V=Math.round(255*V); 
        var R,G,B;

        switch(Math.floor(H)) {

            case 0: R=V; G=C; B=A; break;
            case 1: R=B; G=V; B=A; break;
            case 2: R=A; G=V; B=C; break;
            case 3: R=A; G=B; B=V; break;
            case 4: R=C; G=A; B=V; break;
            case 5: R=V; G=A; B=B; break;

        }

        return([R?R:0,G?G:0,B?B:0]);

    }
    else return([(V=Math.round(V*255)),V,V]);

}