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chflame163
2024-01-15 09:37:53 +08:00
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// #region patterns
const float = '-?\\d*(?:\\.\\d+)';
export const number = `(${float}?)`;
export const percentage = `(${float}?%)`;
export const numberOrPercentage = `(${float}?%?)`;
const clamp = (num, min, max) => Math.min(Math.max(min, num), max);
const hexCharacters = 'a-f\\d';
const match3or4Hex = `#?[${hexCharacters}]{3}[${hexCharacters}]?`;
const match6or8Hex = `#?[${hexCharacters}]{6}([${hexCharacters}]{2})?`;
const nonHexChars = new RegExp(`[^#${hexCharacters}]`, 'gi');
const validHexSize = new RegExp(`^${match3or4Hex}$|^${match6or8Hex}$`, 'i');
export const hex_pattern = new RegExp(/^#([a-f0-9]{3,4}|[a-f0-9]{4}(?:[a-f0-9]{2}){1,2})\b$/, "i");
export const hsl3_pattern = new RegExp(`^
hsla?\\(
\\s*(-?\\d*(?:\\.\\d+)?(?:deg|rad|turn)?)\\s*,
\\s*${percentage}\\s*,
\\s*${percentage}\\s*
(?:,\\s*${numberOrPercentage}\\s*)?
\\)
$
`.replace(/\n|\s/g, ''))
export const hsl4_pattern = new RegExp(`^
hsla?\\(
\\s*(-?\\d*(?:\\.\\d+)?(?:deg|rad|turn)?)\\s*
\\s+${percentage}
\\s+${percentage}
\\s*(?:\\s*\\/\\s*${numberOrPercentage}\\s*)?
\\)
$
`.replace(/\n|\s/g, ''))
export const rgb3_pattern = new RegExp(`^
rgba?\\(
\\s*${number}\\s*,
\\s*${number}\\s*,
\\s*${number}\\s*
(?:,\\s*${numberOrPercentage}\\s*)?
\\)
$
`.replace(/\n|\s/g, ''))
export const rgb4_pattern = new RegExp(`^
rgba?\\(
\\s*${number}
\\s+${number}
\\s+${number}
\\s*(?:\\s*\\/\\s*${numberOrPercentage}\\s*)?
\\)
$
`.replace(/\n|\s/g, ''));
export const transparent_pattern = new RegExp(/^transparent$/, 'i');
// #endregion
// #region utils
/* 500 => 255, -10 => 0, 128 => 128 */
const parseRGB = (num) => {
let n = num;
if (typeof n !== 'number') {
n = n.endsWith('%') ? (parseFloat(n) * 255) / 100 : parseFloat(n);
}
return clamp(Math.round(n), 0, 255);
};
/* 200 => 100, -100 => 0, 50 => 50 */
const parsePercentage = (percentage) => clamp(parseFloat(percentage), 0, 100);
/* '50%' => 5.0, 200 => 1, -10 => 0 */
function parseAlpha(alpha) {
let a = alpha;
if (typeof a !== 'number') {
a = a.endsWith('%') ? parseFloat(a) / 100 : parseFloat(a);
}
return clamp(a, 0, 1);
}
export function getHEX(hex) {
const [r, g, b, a] = hex2Rgb(hex, { format: 'array' });
return getRGB([null, ...[r, g, b, a]]);
}
export function getHSL([, h, s, l, a = 1]) {
let hh = h;
if (hh.endsWith('turn')) {
hh = (parseFloat(hh) * 360) / 1;
} else if (hh.endsWith('rad')) {
hh = Math.round((parseFloat(hh) * 180) / Math.PI);
} else {
hh = parseFloat(hh);
}
return {
type: 'hsl',
values: [hh, parsePercentage(s), parsePercentage(l)],
alpha: parseAlpha(a === null ? 1 : a)
};
}
export function getRGB([, r, g, b, a = 1]) {
return {
type: 'rgb',
values: [r, g, b].map(parseRGB),
alpha: parseAlpha(a === null ? 1 : a)
};
}
export function hex2Rgb(hex, options = {}) {
if (typeof hex !== 'string' || nonHexChars.test(hex) || !validHexSize.test(hex)) {
throw new TypeError('Expected a valid hex string');
}
hex = hex.replace(/^#/, '');
let alphaFromHex = 1;
if (hex.length === 8) {
alphaFromHex = Number.parseInt(hex.slice(6, 8), 16) / 255;
hex = hex.slice(0, 6);
}
if (hex.length === 4) {
alphaFromHex = Number.parseInt(hex.slice(3, 4).repeat(2), 16) / 255;
hex = hex.slice(0, 3);
}
if (hex.length === 3) {
hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
}
const number = Number.parseInt(hex, 16);
const red = number >> 16;
const green = (number >> 8) & 255;
const blue = number & 255;
const alpha = typeof options.alpha === 'number' ? options.alpha : alphaFromHex;
if (options.format === 'array') {
return [red, green, blue, alpha];
}
if (options.format === 'css') {
const alphaString = alpha === 1 ? '' : ` / ${Number((alpha * 100).toFixed(2))}%`;
return `rgb(${red} ${green} ${blue}${alphaString})`;
}
return {red, green, blue, alpha};
}
// #endregion
// #region colorNames
export const colorName = {
aliceblue: [240, 248, 255],
antiquewhite: [250, 235, 215],
aqua: [0, 255, 255],
aquamarine: [127, 255, 212],
azure: [240, 255, 255],
beige: [245, 245, 220],
bisque: [255, 228, 196],
black: [0, 0, 0],
blanchedalmond: [255, 235, 205],
blue: [0, 0, 255],
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],
fuchsia: [255, 0, 255],
gainsboro: [220, 220, 220],
ghostwhite: [248, 248, 255],
gold: [255, 215, 0],
goldenrod: [218, 165, 32],
gray: [128, 128, 128],
green: [0, 128, 0],
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],
lime: [0, 255, 0],
limegreen: [50, 205, 50],
linen: [250, 240, 230],
magenta: [255, 0, 255],
maroon: [128, 0, 0],
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],
navy: [0, 0, 128],
oldlace: [253, 245, 230],
olive: [128, 128, 0],
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],
purple: [128, 0, 128],
rebeccapurple: [102, 51, 153],
red: [255, 0, 0],
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],
silver: [192, 192, 192],
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],
teal: [0, 128, 128],
thistle: [216, 191, 216],
tomato: [255, 99, 71],
turquoise: [64, 224, 208],
violet: [238, 130, 238],
wheat: [245, 222, 179],
white: [255, 255, 255],
whitesmoke: [245, 245, 245],
yellow: [255, 255, 0],
yellowgreen: [154, 205, 50]
}
// #endregion
export const parseCSSColor = (str, debug=false) => {
if (typeof str !== 'string') {
console.error(`parseCSSColor: expected a string found ${typeof str}`,str);
return null;
}
const hex = hex_pattern.exec(str);
if (hex) {
if (debug){
console.debug('parseCSSColor: hex', hex);
}
return getHEX(hex[0]);
}
const hsl = hsl4_pattern.exec(str) || hsl3_pattern.exec(str);
if (hsl) {
if (debug){
console.debug('parseCSSColor: hsl', hsl);
}
return getHSL(hsl);
}
const rgb =
rgb4_pattern.exec(str) ||
rgb3_pattern.exec(str)
if (rgb) {
if (debug){
console.debug('parseCSSColor: rgb', rgb);
}
return getRGB(rgb);
}
if (transparent_pattern.exec(str)) {
if (debug){
console.debug('parseCSSColor: transparent');
}
return getRGB([null, 0, 0, 0, 0]);
}
const cn = colorName[str.toLowerCase()];
if (cn) {
if (debug){
console.debug('parseCSSColor: colorName', cn);
}
return getRGB([null, cn[0], cn[1], cn[2], 1]);
}
console.error('parseCSSColor: unknown color', str);
return null;
};
export default parseCSSColor;