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118 lines
3.9 KiB
118 lines
3.9 KiB
4 years ago
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'use strict';
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const colors = { enabled: true, visible: true, styles: {}, keys: {} };
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if ('FORCE_COLOR' in process.env) {
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colors.enabled = process.env.FORCE_COLOR !== '0';
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}
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const ansi = style => {
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style.open = `\u001b[${style.codes[0]}m`;
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style.close = `\u001b[${style.codes[1]}m`;
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style.regex = new RegExp(`\\u001b\\[${style.codes[1]}m`, 'g');
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return style;
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};
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const wrap = (style, str, nl) => {
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let { open, close, regex } = style;
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str = open + (str.includes(close) ? str.replace(regex, close + open) : str) + close;
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// see https://github.com/chalk/chalk/pull/92, thanks to the
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// chalk contributors for this fix. However, we've confirmed that
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// this issue is also present in Windows terminals
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return nl ? str.replace(/\r?\n/g, `${close}$&${open}`) : str;
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};
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const style = (input, stack) => {
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if (input === '' || input == null) return '';
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if (colors.enabled === false) return input;
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if (colors.visible === false) return '';
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let str = '' + input;
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let nl = str.includes('\n');
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let n = stack.length;
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while (n-- > 0) str = wrap(colors.styles[stack[n]], str, nl);
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return str;
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};
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const define = (name, codes, type) => {
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colors.styles[name] = ansi({ name, codes });
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let t = colors.keys[type] || (colors.keys[type] = []);
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t.push(name);
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Reflect.defineProperty(colors, name, {
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get() {
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let color = input => style(input, color.stack);
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Reflect.setPrototypeOf(color, colors);
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color.stack = this.stack ? this.stack.concat(name) : [name];
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return color;
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}
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});
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};
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define('reset', [0, 0], 'modifier');
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define('bold', [1, 22], 'modifier');
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define('dim', [2, 22], 'modifier');
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define('italic', [3, 23], 'modifier');
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define('underline', [4, 24], 'modifier');
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define('inverse', [7, 27], 'modifier');
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define('hidden', [8, 28], 'modifier');
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define('strikethrough', [9, 29], 'modifier');
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define('black', [30, 39], 'color');
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define('red', [31, 39], 'color');
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define('green', [32, 39], 'color');
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define('yellow', [33, 39], 'color');
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define('blue', [34, 39], 'color');
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define('magenta', [35, 39], 'color');
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define('cyan', [36, 39], 'color');
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define('white', [37, 39], 'color');
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define('gray', [90, 39], 'color');
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define('grey', [90, 39], 'color');
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define('bgBlack', [40, 49], 'bg');
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define('bgRed', [41, 49], 'bg');
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define('bgGreen', [42, 49], 'bg');
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define('bgYellow', [43, 49], 'bg');
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define('bgBlue', [44, 49], 'bg');
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define('bgMagenta', [45, 49], 'bg');
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define('bgCyan', [46, 49], 'bg');
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define('bgWhite', [47, 49], 'bg');
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define('blackBright', [90, 39], 'bright');
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define('redBright', [91, 39], 'bright');
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define('greenBright', [92, 39], 'bright');
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define('yellowBright', [93, 39], 'bright');
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define('blueBright', [94, 39], 'bright');
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define('magentaBright', [95, 39], 'bright');
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define('cyanBright', [96, 39], 'bright');
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define('whiteBright', [97, 39], 'bright');
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define('bgBlackBright', [100, 49], 'bgBright');
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define('bgRedBright', [101, 49], 'bgBright');
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define('bgGreenBright', [102, 49], 'bgBright');
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define('bgYellowBright', [103, 49], 'bgBright');
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define('bgBlueBright', [104, 49], 'bgBright');
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define('bgMagentaBright', [105, 49], 'bgBright');
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define('bgCyanBright', [106, 49], 'bgBright');
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define('bgWhiteBright', [107, 49], 'bgBright');
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/* eslint-disable no-control-regex */
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// this is a modified, optimized version of
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// https://github.com/chalk/ansi-regex (MIT License)
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const re = colors.ansiRegex = /[\u001b\u009b][[\]#;?()]*(?:(?:(?:[^\W_]*;?[^\W_]*)\u0007)|(?:(?:[0-9]{1,4}(;[0-9]{0,4})*)?[~0-9=<>cf-nqrtyA-PRZ]))/g;
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colors.hasColor = colors.hasAnsi = str => {
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re.lastIndex = 0;
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return !!str && typeof str === 'string' && re.test(str);
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};
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colors.unstyle = str => {
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re.lastIndex = 0;
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return typeof str === 'string' ? str.replace(re, '') : str;
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};
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colors.none = colors.clear = colors.noop = str => str; // no-op, for programmatic usage
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colors.stripColor = colors.unstyle;
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colors.symbols = require('./symbols');
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colors.define = define;
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module.exports = colors;
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