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index.js5.1 KB · 224 lines
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};${blue}m`; const styles = {	modifier: {		reset: [0, 0],		// 21 isn't widely supported and 22 does the same thing		bold: [1, 22],		dim: [2, 22],		italic: [3, 23],		underline: [4, 24],		overline: [53, 55],		inverse: [7, 27],		hidden: [8, 28],		strikethrough: [9, 29],	},	color: {		black: [30, 39],		red: [31, 39],		green: [32, 39],		yellow: [33, 39],		blue: [34, 39],		magenta: [35, 39],		cyan: [36, 39],		white: [37, 39], 		// Bright color		blackBright: [90, 39],		gray: [90, 39], // Alias of `blackBright`		grey: [90, 39], // Alias of `blackBright`		redBright: [91, 39],		greenBright: [92, 39],		yellowBright: [93, 39],		blueBright: [94, 39],		magentaBright: [95, 39],		cyanBright: [96, 39],		whiteBright: [97, 39],	},	bgColor: {		bgBlack: [40, 49],		bgRed: [41, 49],		bgGreen: [42, 49],		bgYellow: [43, 49],		bgBlue: [44, 49],		bgMagenta: [45, 49],		bgCyan: [46, 49],		bgWhite: [47, 49], 		// Bright color		bgBlackBright: [100, 49],		bgGray: [100, 49], // Alias of `bgBlackBright`		bgGrey: [100, 49], // Alias of `bgBlackBright`		bgRedBright: [101, 49],		bgGreenBright: [102, 49],		bgYellowBright: [103, 49],		bgBlueBright: [104, 49],		bgMagentaBright: [105, 49],		bgCyanBright: [106, 49],		bgWhiteBright: [107, 49],	},}; export const modifierNames = Object.keys(styles.modifier);export const foregroundColorNames = Object.keys(styles.color);export const backgroundColorNames = Object.keys(styles.bgColor);export const colorNames = [...foregroundColorNames, ...backgroundColorNames]; function assembleStyles() {	const codes = new Map(); 	for (const [groupName, group] of Object.entries(styles)) {		for (const [styleName, style] of Object.entries(group)) {			styles[styleName] = {				open: `\u001B[${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 = /[a-f\d]{6}|[a-f\d]{3}/i.exec(hex.toString(16));				if (!matches) {					return [0, 0, 0];				} 				let [colorString] = matches; 				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;