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228 lines
6.3 KiB
228 lines
6.3 KiB
'use strict'; |
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const escapeStringRegexp = require('escape-string-regexp'); |
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const ansiStyles = require('ansi-styles'); |
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const stdoutColor = require('supports-color').stdout; |
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const template = require('./templates.js'); |
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const isSimpleWindowsTerm = process.platform === 'win32' && !(process.env.TERM || '').toLowerCase().startsWith('xterm'); |
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// `supportsColor.level` → `ansiStyles.color[name]` mapping |
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const levelMapping = ['ansi', 'ansi', 'ansi256', 'ansi16m']; |
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// `color-convert` models to exclude from the Chalk API due to conflicts and such |
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const skipModels = new Set(['gray']); |
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const styles = Object.create(null); |
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function applyOptions(obj, options) { |
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options = options || {}; |
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// Detect level if not set manually |
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const scLevel = stdoutColor ? stdoutColor.level : 0; |
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obj.level = options.level === undefined ? scLevel : options.level; |
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obj.enabled = 'enabled' in options ? options.enabled : obj.level > 0; |
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} |
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function Chalk(options) { |
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// We check for this.template here since calling `chalk.constructor()` |
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// by itself will have a `this` of a previously constructed chalk object |
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if (!this || !(this instanceof Chalk) || this.template) { |
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const chalk = {}; |
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applyOptions(chalk, options); |
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chalk.template = function () { |
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const args = [].slice.call(arguments); |
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return chalkTag.apply(null, [chalk.template].concat(args)); |
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}; |
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Object.setPrototypeOf(chalk, Chalk.prototype); |
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Object.setPrototypeOf(chalk.template, chalk); |
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chalk.template.constructor = Chalk; |
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return chalk.template; |
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} |
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applyOptions(this, options); |
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} |
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// Use bright blue on Windows as the normal blue color is illegible |
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if (isSimpleWindowsTerm) { |
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ansiStyles.blue.open = '\u001B[94m'; |
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} |
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for (const key of Object.keys(ansiStyles)) { |
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ansiStyles[key].closeRe = new RegExp(escapeStringRegexp(ansiStyles[key].close), 'g'); |
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styles[key] = { |
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get() { |
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const codes = ansiStyles[key]; |
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return build.call(this, this._styles ? this._styles.concat(codes) : [codes], this._empty, key); |
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} |
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}; |
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} |
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styles.visible = { |
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get() { |
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return build.call(this, this._styles || [], true, 'visible'); |
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} |
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}; |
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ansiStyles.color.closeRe = new RegExp(escapeStringRegexp(ansiStyles.color.close), 'g'); |
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for (const model of Object.keys(ansiStyles.color.ansi)) { |
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if (skipModels.has(model)) { |
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continue; |
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} |
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styles[model] = { |
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get() { |
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const level = this.level; |
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return function () { |
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const open = ansiStyles.color[levelMapping[level]][model].apply(null, arguments); |
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const codes = { |
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open, |
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close: ansiStyles.color.close, |
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closeRe: ansiStyles.color.closeRe |
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}; |
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return build.call(this, this._styles ? this._styles.concat(codes) : [codes], this._empty, model); |
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}; |
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} |
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}; |
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} |
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ansiStyles.bgColor.closeRe = new RegExp(escapeStringRegexp(ansiStyles.bgColor.close), 'g'); |
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for (const model of Object.keys(ansiStyles.bgColor.ansi)) { |
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if (skipModels.has(model)) { |
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continue; |
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} |
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const bgModel = 'bg' + model[0].toUpperCase() + model.slice(1); |
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styles[bgModel] = { |
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get() { |
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const level = this.level; |
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return function () { |
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const open = ansiStyles.bgColor[levelMapping[level]][model].apply(null, arguments); |
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const codes = { |
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open, |
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close: ansiStyles.bgColor.close, |
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closeRe: ansiStyles.bgColor.closeRe |
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}; |
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return build.call(this, this._styles ? this._styles.concat(codes) : [codes], this._empty, model); |
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}; |
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} |
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}; |
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} |
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const proto = Object.defineProperties(() => {}, styles); |
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function build(_styles, _empty, key) { |
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const builder = function () { |
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return applyStyle.apply(builder, arguments); |
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}; |
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builder._styles = _styles; |
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builder._empty = _empty; |
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const self = this; |
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Object.defineProperty(builder, 'level', { |
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enumerable: true, |
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get() { |
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return self.level; |
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}, |
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set(level) { |
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self.level = level; |
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} |
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}); |
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Object.defineProperty(builder, 'enabled', { |
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enumerable: true, |
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get() { |
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return self.enabled; |
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}, |
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set(enabled) { |
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self.enabled = enabled; |
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} |
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}); |
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// See below for fix regarding invisible grey/dim combination on Windows |
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builder.hasGrey = this.hasGrey || key === 'gray' || key === 'grey'; |
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// `__proto__` is used because we must return a function, but there is |
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// no way to create a function with a different prototype |
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builder.__proto__ = proto; // eslint-disable-line no-proto |
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return builder; |
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} |
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function applyStyle() { |
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// Support varags, but simply cast to string in case there's only one arg |
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const args = arguments; |
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const argsLen = args.length; |
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let str = String(arguments[0]); |
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if (argsLen === 0) { |
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return ''; |
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} |
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if (argsLen > 1) { |
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// Don't slice `arguments`, it prevents V8 optimizations |
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for (let a = 1; a < argsLen; a++) { |
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str += ' ' + args[a]; |
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} |
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} |
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if (!this.enabled || this.level <= 0 || !str) { |
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return this._empty ? '' : str; |
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} |
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// Turns out that on Windows dimmed gray text becomes invisible in cmd.exe, |
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// see https://github.com/chalk/chalk/issues/58 |
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// If we're on Windows and we're dealing with a gray color, temporarily make 'dim' a noop. |
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const originalDim = ansiStyles.dim.open; |
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if (isSimpleWindowsTerm && this.hasGrey) { |
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ansiStyles.dim.open = ''; |
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} |
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for (const code of this._styles.slice().reverse()) { |
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// Replace any instances already present with a re-opening code |
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// otherwise only the part of the string until said closing code |
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// will be colored, and the rest will simply be 'plain'. |
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str = code.open + str.replace(code.closeRe, code.open) + code.close; |
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// Close the styling before a linebreak and reopen |
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// after next line to fix a bleed issue on macOS |
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// https://github.com/chalk/chalk/pull/92 |
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str = str.replace(/\r?\n/g, `${code.close}$&${code.open}`); |
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} |
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// Reset the original `dim` if we changed it to work around the Windows dimmed gray issue |
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ansiStyles.dim.open = originalDim; |
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return str; |
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} |
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function chalkTag(chalk, strings) { |
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if (!Array.isArray(strings)) { |
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// If chalk() was called by itself or with a string, |
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// return the string itself as a string. |
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return [].slice.call(arguments, 1).join(' '); |
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} |
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const args = [].slice.call(arguments, 2); |
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const parts = [strings.raw[0]]; |
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for (let i = 1; i < strings.length; i++) { |
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parts.push(String(args[i - 1]).replace(/[{}\\]/g, '\\$&')); |
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parts.push(String(strings.raw[i])); |
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} |
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return template(chalk, parts.join('')); |
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} |
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Object.defineProperties(Chalk.prototype, styles); |
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module.exports = Chalk(); // eslint-disable-line new-cap |
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module.exports.supportsColor = stdoutColor; |
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module.exports.default = module.exports; // For TypeScript
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