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