338 lines
8.0 KiB
TypeScript
338 lines
8.0 KiB
TypeScript
/* https://developer.mozilla.org/en-US/docs/Web/CSS/color_value
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$$('#colors_table tbody tr')
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.map((row) => {
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const [name, hex] = Array.from(row.children).slice(-3);
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return [name.innerText.trim().replace(/\s.+/g, ''), hex.innerText.trim()];
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}).sort((a, b) => [a[0], b[0]].sort()[0] === a[0] ? -1 : 1)
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.map(([name, hex]) => `${name} : '${hex}',`)
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.join('\n')
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*/
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const namedColors = {
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aliceblue: "#f0f8ff",
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antiquewhite: "#faebd7",
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aqua: "#00ffff",
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aquamarine: "#7fffd4",
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azure: "#f0ffff",
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beige: "#f5f5dc",
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bisque: "#ffe4c4",
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black: "#000000",
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blanchedalmond: "#ffebcd",
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blue: "#0000ff",
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blueviolet: "#8a2be2",
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brown: "#a52a2a",
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burlywood: "#deb887",
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cadetblue: "#5f9ea0",
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chartreuse: "#7fff00",
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chocolate: "#d2691e",
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coral: "#ff7f50",
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cornflowerblue: "#6495ed",
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cornsilk: "#fff8dc",
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crimson: "#dc143c",
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cyan: "#00ffff",
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darkblue: "#00008b",
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darkcyan: "#008b8b",
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darkgoldenrod: "#b8860b",
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darkgray: "#a9a9a9",
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darkgreen: "#006400",
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darkgrey: "#a9a9a9",
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darkkhaki: "#bdb76b",
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darkmagenta: "#8b008b",
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darkolivegreen: "#556b2f",
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darkorange: "#ff8c00",
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darkorchid: "#9932cc",
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darkred: "#8b0000",
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darksalmon: "#e9967a",
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darkseagreen: "#8fbc8f",
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darkslateblue: "#483d8b",
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darkslategray: "#2f4f4f",
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darkslategrey: "#2f4f4f",
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darkturquoise: "#00ced1",
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darkviolet: "#9400d3",
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deeppink: "#ff1493",
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deepskyblue: "#00bfff",
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dimgray: "#696969",
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dimgrey: "#696969",
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dodgerblue: "#1e90ff",
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firebrick: "#b22222",
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floralwhite: "#fffaf0",
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forestgreen: "#228b22",
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fuchsia: "#ff00ff",
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gainsboro: "#dcdcdc",
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ghostwhite: "#f8f8ff",
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gold: "#ffd700",
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goldenrod: "#daa520",
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gray: "#808080",
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green: "#008000",
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greenyellow: "#adff2f",
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grey: "#808080",
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honeydew: "#f0fff0",
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hotpink: "#ff69b4",
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indianred: "#cd5c5c",
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indigo: "#4b0082",
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ivory: "#fffff0",
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khaki: "#f0e68c",
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lavender: "#e6e6fa",
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lavenderblush: "#fff0f5",
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lawngreen: "#7cfc00",
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lemonchiffon: "#fffacd",
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lightblue: "#add8e6",
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lightcoral: "#f08080",
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lightcyan: "#e0ffff",
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lightgoldenrodyellow: "#fafad2",
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lightgray: "#d3d3d3",
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lightgreen: "#90ee90",
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lightgrey: "#d3d3d3",
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lightpink: "#ffb6c1",
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lightsalmon: "#ffa07a",
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lightseagreen: "#20b2aa",
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lightskyblue: "#87cefa",
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lightslategray: "#778899",
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lightslategrey: "#778899",
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lightsteelblue: "#b0c4de",
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lightyellow: "#ffffe0",
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lime: "#00ff00",
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limegreen: "#32cd32",
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linen: "#faf0e6",
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magenta: "#ff00ff",
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maroon: "#800000",
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mediumaquamarine: "#66cdaa",
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mediumblue: "#0000cd",
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mediumorchid: "#ba55d3",
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mediumpurple: "#9370db",
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mediumseagreen: "#3cb371",
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mediumslateblue: "#7b68ee",
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mediumspringgreen: "#00fa9a",
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mediumturquoise: "#48d1cc",
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mediumvioletred: "#c71585",
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midnightblue: "#191970",
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mintcream: "#f5fffa",
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mistyrose: "#ffe4e1",
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moccasin: "#ffe4b5",
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navajowhite: "#ffdead",
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navy: "#000080",
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oldlace: "#fdf5e6",
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olive: "#808000",
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olivedrab: "#6b8e23",
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orange: "#ffa500",
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orangered: "#ff4500",
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orchid: "#da70d6",
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palegoldenrod: "#eee8aa",
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palegreen: "#98fb98",
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paleturquoise: "#afeeee",
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palevioletred: "#db7093",
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papayawhip: "#ffefd5",
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peachpuff: "#ffdab9",
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peru: "#cd853f",
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pink: "#ffc0cb",
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plum: "#dda0dd",
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powderblue: "#b0e0e6",
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purple: "#800080",
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rebeccapurple: "#663399",
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red: "#ff0000",
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rosybrown: "#bc8f8f",
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royalblue: "#4169e1",
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saddlebrown: "#8b4513",
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salmon: "#fa8072",
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sandybrown: "#f4a460",
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seagreen: "#2e8b57",
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seashell: "#fff5ee",
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sienna: "#a0522d",
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silver: "#c0c0c0",
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skyblue: "#87ceeb",
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slateblue: "#6a5acd",
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slategray: "#708090",
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slategrey: "#708090",
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snow: "#fffafa",
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springgreen: "#00ff7f",
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steelblue: "#4682b4",
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tan: "#d2b48c",
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teal: "#008080",
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thistle: "#d8bfd8",
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tomato: "#ff6347",
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turquoise: "#40e0d0",
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violet: "#ee82ee",
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wheat: "#f5deb3",
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white: "#ffffff",
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whitesmoke: "#f5f5f5",
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yellow: "#ffff00",
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yellowgreen: "#9acd32",
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};
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interface ColorRGB {
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r: number;
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g: number;
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b: number;
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}
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interface ColorHSV {
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h: number;
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s: number;
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v: number;
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}
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export enum ColorFmt {
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RGB, // rgb(R,G,B)
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HEX, // #RRGGBB
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}
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function hsvToRgb({ h, s, v }: ColorHSV): ColorRGB {
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const i = Math.floor(h * 6);
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const f = h * 6 - i;
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const p = v * (1 - s);
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const q = v * (1 - f * s);
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const t = v * (1 - (1 - f) * s);
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switch (i % 6) {
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case 0:
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return { r: v, g: t, b: p };
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case 1:
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return { r: q, g: v, b: p };
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case 2:
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return { r: p, g: v, b: t };
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case 3:
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return { r: p, g: q, b: v };
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case 4:
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return { r: t, g: p, b: v };
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case 5:
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return { r: v, g: p, b: q };
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default:
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throw new Error("unreacheable");
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}
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}
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function rgbToHsv({ r, g, b }: ColorRGB): ColorHSV {
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const max = Math.max(r, g, b);
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const min = Math.min(r, g, b);
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const v = max;
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const d = max - min;
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const s = max === 0 ? 0 : d / max;
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let h;
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if (max === min) {
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h = 0; // achromatic
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} else {
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switch (max) {
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case r:
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h = (g - b) / d + (g < b ? 6 : 0);
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break;
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case g:
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h = (b - r) / d + 2;
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break;
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case b:
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h = (r - g) / d + 4;
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break;
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default:
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throw new Error("unreacheable");
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}
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h /= 6;
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}
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return { h, s, v };
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}
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// Hacky way to get RGB values FOR SURE!
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function nameToRGB(name: string): ColorRGB {
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if (namedColors[name]) {
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return parseColor(namedColors[name]);
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}
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// Create fake div
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const fakeDiv = document.createElement("div");
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fakeDiv.style.color = name;
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document.body.appendChild(fakeDiv);
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// Get color of div
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const cs = window.getComputedStyle(fakeDiv);
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const pv = cs.getPropertyValue("color");
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// Remove div after obtaining desired color value
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document.body.removeChild(fakeDiv);
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return parseColor(pv);
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}
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// If you also wonder "What the fuck", go here:
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// https://stackoverflow.com/questions/11068240/what-is-the-most-efficient-way-to-parse-a-css-color-in-javascript
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function parseColor(input: string): ColorRGB {
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// Hex format
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if (input[0] === "#") {
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const collen = (input.length - 1) / 3;
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const fact = [17, 1, 0.062272][collen - 1];
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return {
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r: Math.round(parseInt(input.substr(1, collen), 16) * fact) / 256,
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g:
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Math.round(parseInt(input.substr(1 + collen, collen), 16) * fact) / 256,
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b:
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Math.round(parseInt(input.substr(1 + 2 * collen, collen), 16) * fact) /
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256,
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};
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}
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if (input.startsWith("rgb")) {
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// RGB() format
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const vals = input
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.split("(")[1]
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.split(")")[0]
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.split(",")
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.map((i) => parseInt(i, 10))
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.map(Math.round);
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return { r: vals[0] / 256, g: vals[1] / 256, b: vals[2] / 256 };
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}
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// Fuck, well.. normalize it and put it into an element and get back to me
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return nameToRGB(input);
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}
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function serializeColor(col: ColorRGB, format: ColorFmt): string {
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const r = Math.round(col.r * 255);
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const g = Math.round(col.g * 255);
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const b = Math.round(col.b * 255);
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switch (format) {
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case ColorFmt.RGB:
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return `rgb(${r}, ${g}, ${b})`;
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case ColorFmt.HEX: {
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const rhex = `00${r.toString(16)}`.slice(-2);
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const ghex = `00${g.toString(16)}`.slice(-2);
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const bhex = `00${b.toString(16)}`.slice(-2);
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return `#${rhex}${ghex}${bhex}`;
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}
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default:
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return "#000";
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}
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}
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export function darken(color: string, format: ColorFmt): string {
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const col = parseColor(color);
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const hsl = rgbToHsv(col);
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if (hsl.s < 0.15) {
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hsl.h = 0.6;
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hsl.s = 0.5;
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hsl.v = Math.max(0.2, 1 - hsl.v);
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} else if (hsl.v > 0.5) {
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hsl.v = 0.4;
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if (hsl.s > 0.2) {
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hsl.s = Math.min(1, hsl.s + 0.2);
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}
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}
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const out = hsvToRgb(hsl);
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return serializeColor(out, format);
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}
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export function lighten(color: string, format: ColorFmt): string {
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const col = parseColor(color);
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const hsl = rgbToHsv(col);
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if (hsl.v < 0.5) {
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hsl.v = 0.8;
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}
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if (hsl.s > 0.7) {
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hsl.s = Math.min(1, hsl.s - 0.3);
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hsl.v = 1;
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}
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// Blue is shit to read, make it cyan
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if (Math.abs(hsl.h - 0.666) < 0.1) {
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hsl.h -= 0.13;
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hsl.v = Math.min(1, hsl.v + 0.1);
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}
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const out = hsvToRgb(hsl);
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return serializeColor(out, format);
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}
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