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authorMinteck <contact@minteck.org>2022-02-12 10:33:06 +0100
committerMinteck <contact@minteck.org>2022-02-12 10:33:06 +0100
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+const ANSI_BACKGROUND_OFFSET = 10;
+
+const wrapAnsi16 = (offset = 0) => code => `\u001B[${code + offset}m`;
+
+const wrapAnsi256 = (offset = 0) => code => `\u001B[${38 + offset};5;${code}m`;
+
+const wrapAnsi16m = (offset = 0) => (red, green, blue) => `\u001B[${38 + offset};2;${red};${green};${blue}m`;
+
+function assembleStyles() {
+ const codes = new Map();
+ const styles = {
+ modifier: {
+ reset: [0, 0],
+ // 21 isn't widely supported and 22 does the same thing
+ bold: [1, 22],
+ dim: [2, 22],
+ italic: [3, 23],
+ underline: [4, 24],
+ overline: [53, 55],
+ inverse: [7, 27],
+ hidden: [8, 28],
+ strikethrough: [9, 29],
+ },
+ color: {
+ black: [30, 39],
+ red: [31, 39],
+ green: [32, 39],
+ yellow: [33, 39],
+ blue: [34, 39],
+ magenta: [35, 39],
+ cyan: [36, 39],
+ white: [37, 39],
+
+ // Bright color
+ blackBright: [90, 39],
+ redBright: [91, 39],
+ greenBright: [92, 39],
+ yellowBright: [93, 39],
+ blueBright: [94, 39],
+ magentaBright: [95, 39],
+ cyanBright: [96, 39],
+ whiteBright: [97, 39],
+ },
+ bgColor: {
+ bgBlack: [40, 49],
+ bgRed: [41, 49],
+ bgGreen: [42, 49],
+ bgYellow: [43, 49],
+ bgBlue: [44, 49],
+ bgMagenta: [45, 49],
+ bgCyan: [46, 49],
+ bgWhite: [47, 49],
+
+ // Bright color
+ bgBlackBright: [100, 49],
+ bgRedBright: [101, 49],
+ bgGreenBright: [102, 49],
+ bgYellowBright: [103, 49],
+ bgBlueBright: [104, 49],
+ bgMagentaBright: [105, 49],
+ bgCyanBright: [106, 49],
+ bgWhiteBright: [107, 49],
+ },
+ };
+
+ // Alias bright black as gray (and grey)
+ styles.color.gray = styles.color.blackBright;
+ styles.bgColor.bgGray = styles.bgColor.bgBlackBright;
+ styles.color.grey = styles.color.blackBright;
+ styles.bgColor.bgGrey = styles.bgColor.bgBlackBright;
+
+ for (const [groupName, group] of Object.entries(styles)) {
+ for (const [styleName, style] of Object.entries(group)) {
+ styles[styleName] = {
+ open: `\u001B[${style[0]}m`,
+ close: `\u001B[${style[1]}m`,
+ };
+
+ group[styleName] = styles[styleName];
+
+ codes.set(style[0], style[1]);
+ }
+
+ Object.defineProperty(styles, groupName, {
+ value: group,
+ enumerable: false,
+ });
+ }
+
+ Object.defineProperty(styles, 'codes', {
+ value: codes,
+ enumerable: false,
+ });
+
+ styles.color.close = '\u001B[39m';
+ styles.bgColor.close = '\u001B[49m';
+
+ styles.color.ansi = wrapAnsi16();
+ styles.color.ansi256 = wrapAnsi256();
+ styles.color.ansi16m = wrapAnsi16m();
+ styles.bgColor.ansi = wrapAnsi16(ANSI_BACKGROUND_OFFSET);
+ styles.bgColor.ansi256 = wrapAnsi256(ANSI_BACKGROUND_OFFSET);
+ styles.bgColor.ansi16m = wrapAnsi16m(ANSI_BACKGROUND_OFFSET);
+
+ // From https://github.com/Qix-/color-convert/blob/3f0e0d4e92e235796ccb17f6e85c72094a651f49/conversions.js
+ Object.defineProperties(styles, {
+ rgbToAnsi256: {
+ value: (red, green, blue) => {
+ // We use the extended greyscale palette here, with the exception of
+ // black and white. normal palette only has 4 greyscale shades.
+ if (red === green && green === blue) {
+ if (red < 8) {
+ return 16;
+ }
+
+ if (red > 248) {
+ return 231;
+ }
+
+ return Math.round(((red - 8) / 247) * 24) + 232;
+ }
+
+ return 16
+ + (36 * Math.round(red / 255 * 5))
+ + (6 * Math.round(green / 255 * 5))
+ + Math.round(blue / 255 * 5);
+ },
+ enumerable: false,
+ },
+ hexToRgb: {
+ value: hex => {
+ const matches = /(?<colorString>[a-f\d]{6}|[a-f\d]{3})/i.exec(hex.toString(16));
+ if (!matches) {
+ return [0, 0, 0];
+ }
+
+ let {colorString} = matches.groups;
+
+ if (colorString.length === 3) {
+ colorString = [...colorString].map(character => character + character).join('');
+ }
+
+ const integer = Number.parseInt(colorString, 16);
+
+ return [
+ /* eslint-disable no-bitwise */
+ (integer >> 16) & 0xFF,
+ (integer >> 8) & 0xFF,
+ integer & 0xFF,
+ /* eslint-enable no-bitwise */
+ ];
+ },
+ enumerable: false,
+ },
+ hexToAnsi256: {
+ value: hex => styles.rgbToAnsi256(...styles.hexToRgb(hex)),
+ enumerable: false,
+ },
+ ansi256ToAnsi: {
+ value: code => {
+ if (code < 8) {
+ return 30 + code;
+ }
+
+ if (code < 16) {
+ return 90 + (code - 8);
+ }
+
+ let red;
+ let green;
+ let blue;
+
+ if (code >= 232) {
+ red = (((code - 232) * 10) + 8) / 255;
+ green = red;
+ blue = red;
+ } else {
+ code -= 16;
+
+ const remainder = code % 36;
+
+ red = Math.floor(code / 36) / 5;
+ green = Math.floor(remainder / 6) / 5;
+ blue = (remainder % 6) / 5;
+ }
+
+ const value = Math.max(red, green, blue) * 2;
+
+ if (value === 0) {
+ return 30;
+ }
+
+ // eslint-disable-next-line no-bitwise
+ let result = 30 + ((Math.round(blue) << 2) | (Math.round(green) << 1) | Math.round(red));
+
+ if (value === 2) {
+ result += 60;
+ }
+
+ return result;
+ },
+ enumerable: false,
+ },
+ rgbToAnsi: {
+ value: (red, green, blue) => styles.ansi256ToAnsi(styles.rgbToAnsi256(red, green, blue)),
+ enumerable: false,
+ },
+ hexToAnsi: {
+ value: hex => styles.ansi256ToAnsi(styles.hexToAnsi256(hex)),
+ enumerable: false,
+ },
+ });
+
+ return styles;
+}
+
+const ansiStyles = assembleStyles();
+
+export default ansiStyles;