/*

	Copyright (c) 2004-2008, The Dojo Foundation All Rights Reserved.

	Available via Academic Free License >= 2.1 OR the modified BSD license.

	see: http://dojotoolkit.org/license for details

*/





if(!dojo._hasResource["dojo.colors"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.

dojo._hasResource["dojo.colors"] = true;

dojo.provide("dojo.colors");



//TODO: this module appears to break naming conventions



/*=====

dojo.colors = {

	// summary: Color utilities

}

=====*/



(function(){

	// this is a standard conversion prescribed by the CSS3 Color Module

	var hue2rgb = function(m1, m2, h){

		if(h < 0){ ++h; }

		if(h > 1){ --h; }

		var h6 = 6 * h;

		if(h6 < 1){ return m1 + (m2 - m1) * h6; }

		if(2 * h < 1){ return m2; }

		if(3 * h < 2){ return m1 + (m2 - m1) * (2 / 3 - h) * 6; }

		return m1;

	};

	

	dojo.colorFromRgb = function(/*String*/ color, /*dojo.Color?*/ obj){

		// summary:

		//		get rgb(a) array from css-style color declarations

		// description:

		//		this function can handle all 4 CSS3 Color Module formats: rgb,

		//		rgba, hsl, hsla, including rgb(a) with percentage values.

		var m = color.toLowerCase().match(/^(rgba?|hsla?)\(([\s\.\-,%0-9]+)\)/);

		if(m){

			var c = m[2].split(/\s*,\s*/), l = c.length, t = m[1];

			if((t == "rgb" && l == 3) || (t == "rgba" && l == 4)){

				var r = c[0];

				if(r.charAt(r.length - 1) == "%"){

					// 3 rgb percentage values

					var a = dojo.map(c, function(x){

						return parseFloat(x) * 2.56;

					});

					if(l == 4){ a[3] = c[3]; }

					return dojo.colorFromArray(a, obj);	// dojo.Color

				}

				return dojo.colorFromArray(c, obj);	// dojo.Color

			}

			if((t == "hsl" && l == 3) || (t == "hsla" && l == 4)){

				// normalize hsl values

				var H = ((parseFloat(c[0]) % 360) + 360) % 360 / 360,

					S = parseFloat(c[1]) / 100,

					L = parseFloat(c[2]) / 100,

					// calculate rgb according to the algorithm 

					// recommended by the CSS3 Color Module 

					m2 = L <= 0.5 ? L * (S + 1) : L + S - L * S, 

					m1 = 2 * L - m2,

					a = [hue2rgb(m1, m2, H + 1 / 3) * 256,

						hue2rgb(m1, m2, H) * 256, hue2rgb(m1, m2, H - 1 / 3) * 256, 1];

				if(l == 4){ a[3] = c[3]; }

				return dojo.colorFromArray(a, obj);	// dojo.Color

			}

		}

		return null;	// dojo.Color

	};

	

	var confine = function(c, low, high){

		// summary:

		//		sanitize a color component by making sure it is a number,

		//		and clamping it to valid values

		c = Number(c);

		return isNaN(c) ? high : c < low ? low : c > high ? high : c;	// Number

	};

	

	dojo.Color.prototype.sanitize = function(){

		// summary: makes sure that the object has correct attributes

		var t = this;

		t.r = Math.round(confine(t.r, 0, 255));

		t.g = Math.round(confine(t.g, 0, 255));

		t.b = Math.round(confine(t.b, 0, 255));

		t.a = confine(t.a, 0, 1);

		return this;	// dojo.Color

	};

})();





dojo.colors.makeGrey = function(/*Number*/ g, /*Number?*/ a){

	// summary: creates a greyscale color with an optional alpha

	return dojo.colorFromArray([g, g, g, a]);

};



// mixin all CSS3 named colors not already in _base, along with SVG 1.0 variant spellings

dojo.Color.named = dojo.mixin({

	aliceblue:	[240,248,255],

	antiquewhite:	[250,235,215],

	aquamarine:	[127,255,212],

	azure:	[240,255,255],

	beige:	[245,245,220],

	bisque:	[255,228,196],

	blanchedalmond:	[255,235,205],

	blueviolet:	[138,43,226],

	brown:	[165,42,42],

	burlywood:	[222,184,135],

	cadetblue:	[95,158,160],

	chartreuse:	[127,255,0],

	chocolate:	[210,105,30],

	coral:	[255,127,80],

	cornflowerblue:	[100,149,237],

	cornsilk:	[255,248,220],

	crimson:	[220,20,60],

	cyan:	[0,255,255],

	darkblue:	[0,0,139],

	darkcyan:	[0,139,139],

	darkgoldenrod:	[184,134,11],

	darkgray:	[169,169,169],

	darkgreen:	[0,100,0],

	darkgrey:	[169,169,169],

	darkkhaki:	[189,183,107],

	darkmagenta:	[139,0,139],

	darkolivegreen:	[85,107,47],

	darkorange:	[255,140,0],

	darkorchid:	[153,50,204],

	darkred:	[139,0,0],

	darksalmon:	[233,150,122],

	darkseagreen:	[143,188,143],

	darkslateblue:	[72,61,139],

	darkslategray:	[47,79,79],

	darkslategrey:	[47,79,79],

	darkturquoise:	[0,206,209],

	darkviolet:	[148,0,211],

	deeppink:	[255,20,147],

	deepskyblue:	[0,191,255],

	dimgray:	[105,105,105],

	dimgrey:	[105,105,105],

	dodgerblue:	[30,144,255],

	firebrick:	[178,34,34],

	floralwhite:	[255,250,240],

	forestgreen:	[34,139,34],

	gainsboro:	[220,220,220],

	ghostwhite:	[248,248,255],

	gold:	[255,215,0],

	goldenrod:	[218,165,32],

	greenyellow:	[173,255,47],

	grey:	[128,128,128],

	honeydew:	[240,255,240],

	hotpink:	[255,105,180],

	indianred:	[205,92,92],

	indigo:	[75,0,130],

	ivory:	[255,255,240],

	khaki:	[240,230,140],

	lavender:	[230,230,250],

	lavenderblush:	[255,240,245],

	lawngreen:	[124,252,0],

	lemonchiffon:	[255,250,205],

	lightblue:	[173,216,230],

	lightcoral:	[240,128,128],

	lightcyan:	[224,255,255],

	lightgoldenrodyellow:	[250,250,210],

	lightgray:	[211,211,211],

	lightgreen:	[144,238,144],

	lightgrey:	[211,211,211],

	lightpink:	[255,182,193],

	lightsalmon:	[255,160,122],

	lightseagreen:	[32,178,170],

	lightskyblue:	[135,206,250],

	lightslategray:	[119,136,153],

	lightslategrey:	[119,136,153],

	lightsteelblue:	[176,196,222],

	lightyellow:	[255,255,224],

	limegreen:	[50,205,50],

	linen:	[250,240,230],

	magenta:	[255,0,255],

	mediumaquamarine:	[102,205,170],

	mediumblue:	[0,0,205],

	mediumorchid:	[186,85,211],

	mediumpurple:	[147,112,219],

	mediumseagreen:	[60,179,113],

	mediumslateblue:	[123,104,238],

	mediumspringgreen:	[0,250,154],

	mediumturquoise:	[72,209,204],

	mediumvioletred:	[199,21,133],

	midnightblue:	[25,25,112],

	mintcream:	[245,255,250],

	mistyrose:	[255,228,225],

	moccasin:	[255,228,181],

	navajowhite:	[255,222,173],

	oldlace:	[253,245,230],

	olivedrab:	[107,142,35],

	orange:	[255,165,0],

	orangered:	[255,69,0],

	orchid:	[218,112,214],

	palegoldenrod:	[238,232,170],

	palegreen:	[152,251,152],

	paleturquoise:	[175,238,238],

	palevioletred:	[219,112,147],

	papayawhip:	[255,239,213],

	peachpuff:	[255,218,185],

	peru:	[205,133,63],

	pink:	[255,192,203],

	plum:	[221,160,221],

	powderblue:	[176,224,230],

	rosybrown:	[188,143,143],

	royalblue:	[65,105,225],

	saddlebrown:	[139,69,19],

	salmon:	[250,128,114],

	sandybrown:	[244,164,96],

	seagreen:	[46,139,87],

	seashell:	[255,245,238],

	sienna:	[160,82,45],

	skyblue:	[135,206,235],

	slateblue:	[106,90,205],

	slategray:	[112,128,144],

	slategrey:	[112,128,144],

	snow:	[255,250,250],

	springgreen:	[0,255,127],

	steelblue:	[70,130,180],

	tan:	[210,180,140],

	thistle:	[216,191,216],

	tomato:	[255,99,71],

	transparent: [0, 0, 0, 0],

	turquoise:	[64,224,208],

	violet:	[238,130,238],

	wheat:	[245,222,179],

	whitesmoke:	[245,245,245],

	yellowgreen:	[154,205,50]

}, dojo.Color.named);



}