'use strict' assert = require 'src/assert' ### Parse 3-digit hex, 6-digit hex, rgb, rgba, hsl, hsla, or named color into RGBA hex. ### exports.toRGBAHex = do -> NAMED_COLORS = '': 0x00000000 transparent: 0x00000000 black: 0x000000ff silver: 0xc0c0c0ff gray: 0x808080ff white: 0xffffffff maroon: 0x800000ff red: 0xff0000ff purple: 0x800080ff fuchsia: 0xff00ffff green: 0x008000ff lime: 0x00ff00ff olive: 0x808000ff yellow: 0xffff00ff navy: 0x000080ff blue: 0x0000ffff teal: 0x008080ff aqua: 0x00ffffff orange: 0xffa500ff aliceblue: 0xf0f8ffff antiquewhite: 0xfaebd7ff aquamarine: 0x7fffd4ff azure: 0xf0ffffff beige: 0xf5f5dcff bisque: 0xffe4c4ff blanchedalmond: 0xffe4c4ff blueviolet: 0x8a2be2ff brown: 0xa52a2aff burlywood: 0xdeb887ff cadetblue: 0x5f9ea0ff chartreuse: 0x7fff00ff chocolate: 0xd2691eff coral: 0xff7f50ff cornflowerblue: 0x6495edff cornsilk: 0xfff8dcff crimson: 0xdc143cff darkblue: 0x00008bff darkcyan: 0x008b8bff darkgoldenrod: 0xb8860bff darkgray: 0xa9a9a9ff darkgreen: 0x006400ff darkgrey: 0xa9a9a9ff darkkhaki: 0xbdb76bff darkmagenta: 0x8b008bff darkolivegreen: 0x556b2fff darkorange: 0xff8c00ff darkorchid: 0x9932ccff darkred: 0x8b0000ff darksalmon: 0xe9967aff darkseagreen: 0x8fbc8fff darkslateblue: 0x483d8bff darkslategray: 0x2f4f4fff darkslategrey: 0x2f4f4fff darkturquoise: 0x00ced1ff darkviolet: 0x9400d3ff deeppink: 0xff1493ff deepskyblue: 0x00bfffff dimgray: 0x696969ff dimgrey: 0x696969ff dodgerblue: 0x1e90ffff firebrick: 0xb22222ff floralwhite: 0xfffaf0ff forestgreen: 0x228b22ff gainsboro: 0xdcdcdcff ghostwhite: 0xf8f8ffff gold: 0xffd700ff goldenrod: 0xdaa520ff greenyellow: 0xadff2fff grey: 0x808080ff honeydew: 0xf0fff0ff hotpink: 0xff69b4ff indianred: 0xcd5c5cff indigo: 0x4b0082ff ivory: 0xfffff0ff khaki: 0xf0e68cff lavender: 0xe6e6faff lavenderblush: 0xfff0f5ff lawngreen: 0x7cfc00ff lemonchiffon: 0xfffacdff lightblue: 0xadd8e6ff lightcoral: 0xf08080ff lightcyan: 0xe0ffffff lightgoldenrodyellow: 0xfafad2ff lightgray: 0xd3d3d3ff lightgreen: 0x90ee90ff lightgrey: 0xd3d3d3ff lightpink: 0xffb6c1ff lightsalmon: 0xffa07aff lightseagreen: 0x20b2aaff lightskyblue: 0x87cefaff lightslategray: 0x778899ff lightslategrey: 0x778899ff lightsteelblue: 0xb0c4deff lightyellow: 0xffffe0ff limegreen: 0x32cd32ff linen: 0xfaf0e6ff mediumaquamarine: 0x66cdaaff mediumblue: 0x0000cdff mediumorchid: 0xba55d3ff mediumpurple: 0x9370dbff mediumseagreen: 0x3cb371ff mediumslateblue: 0x7b68eeff mediumspringgreen: 0x00fa9aff mediumturquoise: 0x48d1ccff mediumvioletred: 0xc71585ff midnightblue: 0x191970ff mintcream: 0xf5fffaff mistyrose: 0xffe4e1ff moccasin: 0xffe4b5ff navajowhite: 0xffdeadff oldlace: 0xfdf5e6ff olivedrab: 0x6b8e23ff orangered: 0xff4500ff orchid: 0xda70d6ff palegoldenrod: 0xeee8aaff palegreen: 0x98fb98ff paleturquoise: 0xafeeeeff palevioletred: 0xdb7093ff papayawhip: 0xffefd5ff peachpuff: 0xffdab9ff peru: 0xcd853fff pink: 0xffc0cbff plum: 0xdda0ddff powderblue: 0xb0e0e6ff rosybrown: 0xbc8f8fff royalblue: 0x4169e1ff saddlebrown: 0x8b4513ff salmon: 0xfa8072ff sandybrown: 0xf4a460ff seagreen: 0x2e8b57ff seashell: 0xfff5eeff sienna: 0xa0522dff skyblue: 0x87ceebff slateblue: 0x6a5acdff slategray: 0x708090ff slategrey: 0x708090ff snow: 0xfffafaff springgreen: 0x00ff7fff steelblue: 0x4682b4ff tan: 0xd2b48cff thistle: 0xd8bfd8ff tomato: 0xff6347ff turquoise: 0x40e0d0ff violet: 0xee82eeff wheat: 0xf5deb3ff whitesmoke: 0xf5f5f5ff yellowgreen: 0x9acd32ff rebeccapurple: 0x663399ff DIGIT_3_RE = /^#[0-9a-fA-F]{3}$/ DIGIT_6_RE = /^#[0-9a-fA-F]{6}$/ RGB_RE = /^rgb\s*\(\s*([0-9.]+)\s*,\s*([0-9.]+)\s*,\s*([0-9.]+)\s*\)$/ RGBA_RE = /^rgba\s*\(\s*([0-9.]+)\s*,\s*([0-9.]+)\s*,\s*([0-9.]+)\s*,\s*([0-9.]+)\s*\)$/ HSL_RE = /^hsl\s*\(\s*([0-9.]+)\s*,\s*([0-9.]+)\s*%\s*,\s*([0-9.]+)\s*%\s*\)$/ HSLA_RE = /^hsla\s*\(\s*([0-9.]+)\s*,\s*([0-9.]+)\s*%\s*,\s*([0-9.]+)\s*%\s*,\s*([0-9.]+)\s*\)$/ numberToHex = (val) -> val = parseFloat val if val < 0 val = 0 else if val > 255 val = 255 hex = Math.round val hex alphaToHex = (val) -> numberToHex Math.round(parseFloat(val) * 255) # http://www.w3.org/TR/2011/REC-css3-color-20110607/#hsl-color hslToRgb = do -> hueToRgb = (p, q, t) -> if t < 0 t += 1 if t > 1 t -= 1 if t * 6 < 1 return p + (q - p) * t * 6 if t * 2 < 1 return q if t * 3 < 2 return p + (q - p) * (2 / 3 - t) * 6 return p (hStr, sStr, lStr) -> p = q = h = s = l = 0.0 h = (parseFloat(hStr) % 360) / 360 s = parseFloat(sStr) / 100 l = parseFloat(lStr) / 100 if s is 0 red = green = blue = l else if l <= 0.5 q = l * (s + 1) else q = l + s - l * s p = l * 2 - q red = hueToRgb p, q, h + 1 / 3 green = hueToRgb p, q, h blue = hueToRgb p, q, h - 1 / 3 return Math.round(red * 255) << 16 | Math.round(green * 255) << 8 | Math.round(blue * 255) (color, defaultColor = 'transparent') -> assert.isString color r = g = b = a = 0 if (result = NAMED_COLORS[color]) isnt undefined return result # 3-digit hexadecimal if DIGIT_3_RE.test(color) r = parseInt color[1], 16 g = parseInt color[2], 16 b = parseInt color[3], 16 r = r<<4 | r g = g<<4 | g b = b<<4 | b a = 0xFF # 6-digit hexadecimal else if DIGIT_6_RE.test(color) r = parseInt color.substr(1, 2), 16 g = parseInt color.substr(3, 2), 16 b = parseInt color.substr(5, 2), 16 a = 0xFF # rgb else if match = RGB_RE.exec(color) r = numberToHex match[1] g = numberToHex match[2] b = numberToHex match[3] a = 0xFF # rgba else if match = RGBA_RE.exec(color) r = numberToHex match[1] g = numberToHex match[2] b = numberToHex match[3] a = alphaToHex match[4] # hsl else if match = HSL_RE.exec(color) b = hslToRgb match[1], match[2], match[3] a = 0xFF # hsla else if match = HSLA_RE.exec(color) b = hslToRgb match[1], match[2], match[3] a = alphaToHex match[4] else return exports.toRGBAHex(defaultColor) return (r << 24 | g << 16 | b << 8 | a) >>> 0