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const ansiStyles = require('ansi-styles'); | |
const {stdout: stdoutColor, stderr: stderrColor} = require('supports-color'); | |
const { | |
stringReplaceAll, | |
stringEncaseCRLFWithFirstIndex | |
} = require('./util'); | |
const {isArray} = Array; | |
// `supportsColor.level` → `ansiStyles.color[name]` mapping | |
const levelMapping = [ | |
'ansi', | |
'ansi', | |
'ansi256', | |
'ansi16m' | |
]; | |
const styles = Object.create(null); | |
const applyOptions = (object, options = {}) => { | |
if (options.level && !(Number.isInteger(options.level) && options.level >= 0 && options.level <= 3)) { | |
throw new Error('The `level` option should be an integer from 0 to 3'); | |
} | |
// Detect level if not set manually | |
const colorLevel = stdoutColor ? stdoutColor.level : 0; | |
object.level = options.level === undefined ? colorLevel : options.level; | |
}; | |
class ChalkClass { | |
constructor(options) { | |
// eslint-disable-next-line no-constructor-return | |
return chalkFactory(options); | |
} | |
} | |
const chalkFactory = options => { | |
const chalk = {}; | |
applyOptions(chalk, options); | |
chalk.template = (...arguments_) => chalkTag(chalk.template, ...arguments_); | |
Object.setPrototypeOf(chalk, Chalk.prototype); | |
Object.setPrototypeOf(chalk.template, chalk); | |
chalk.template.constructor = () => { | |
throw new Error('`chalk.constructor()` is deprecated. Use `new chalk.Instance()` instead.'); | |
}; | |
chalk.template.Instance = ChalkClass; | |
return chalk.template; | |
}; | |
function Chalk(options) { | |
return chalkFactory(options); | |
} | |
for (const [styleName, style] of Object.entries(ansiStyles)) { | |
styles[styleName] = { | |
get() { | |
const builder = createBuilder(this, createStyler(style.open, style.close, this._styler), this._isEmpty); | |
Object.defineProperty(this, styleName, {value: builder}); | |
return builder; | |
} | |
}; | |
} | |
styles.visible = { | |
get() { | |
const builder = createBuilder(this, this._styler, true); | |
Object.defineProperty(this, 'visible', {value: builder}); | |
return builder; | |
} | |
}; | |
const usedModels = ['rgb', 'hex', 'keyword', 'hsl', 'hsv', 'hwb', 'ansi', 'ansi256']; | |
for (const model of usedModels) { | |
styles[model] = { | |
get() { | |
const {level} = this; | |
return function (...arguments_) { | |
const styler = createStyler(ansiStyles.color[levelMapping[level]][model](...arguments_), ansiStyles.color.close, this._styler); | |
return createBuilder(this, styler, this._isEmpty); | |
}; | |
} | |
}; | |
} | |
for (const model of usedModels) { | |
const bgModel = 'bg' + model[0].toUpperCase() + model.slice(1); | |
styles[bgModel] = { | |
get() { | |
const {level} = this; | |
return function (...arguments_) { | |
const styler = createStyler(ansiStyles.bgColor[levelMapping[level]][model](...arguments_), ansiStyles.bgColor.close, this._styler); | |
return createBuilder(this, styler, this._isEmpty); | |
}; | |
} | |
}; | |
} | |
const proto = Object.defineProperties(() => {}, { | |
...styles, | |
level: { | |
enumerable: true, | |
get() { | |
return this._generator.level; | |
}, | |
set(level) { | |
this._generator.level = level; | |
} | |
} | |
}); | |
const createStyler = (open, close, parent) => { | |
let openAll; | |
let closeAll; | |
if (parent === undefined) { | |
openAll = open; | |
closeAll = close; | |
} else { | |
openAll = parent.openAll + open; | |
closeAll = close + parent.closeAll; | |
} | |
return { | |
open, | |
close, | |
openAll, | |
closeAll, | |
parent | |
}; | |
}; | |
const createBuilder = (self, _styler, _isEmpty) => { | |
const builder = (...arguments_) => { | |
if (isArray(arguments_[0]) && isArray(arguments_[0].raw)) { | |
// Called as a template literal, for example: chalk.red`2 + 3 = {bold ${2+3}}` | |
return applyStyle(builder, chalkTag(builder, ...arguments_)); | |
} | |
// Single argument is hot path, implicit coercion is faster than anything | |
// eslint-disable-next-line no-implicit-coercion | |
return applyStyle(builder, (arguments_.length === 1) ? ('' + arguments_[0]) : arguments_.join(' ')); | |
}; | |
// We alter the prototype because we must return a function, but there is | |
// no way to create a function with a different prototype | |
Object.setPrototypeOf(builder, proto); | |
builder._generator = self; | |
builder._styler = _styler; | |
builder._isEmpty = _isEmpty; | |
return builder; | |
}; | |
const applyStyle = (self, string) => { | |
if (self.level <= 0 || !string) { | |
return self._isEmpty ? '' : string; | |
} | |
let styler = self._styler; | |
if (styler === undefined) { | |
return string; | |
} | |
const {openAll, closeAll} = styler; | |
if (string.indexOf('\u001B') !== -1) { | |
while (styler !== undefined) { | |
// Replace any instances already present with a re-opening code | |
// otherwise only the part of the string until said closing code | |
// will be colored, and the rest will simply be 'plain'. | |
string = stringReplaceAll(string, styler.close, styler.open); | |
styler = styler.parent; | |
} | |
} | |
// We can move both next actions out of loop, because remaining actions in loop won't have | |
// any/visible effect on parts we add here. Close the styling before a linebreak and reopen | |
// after next line to fix a bleed issue on macOS: https://github.com/chalk/chalk/pull/92 | |
const lfIndex = string.indexOf('\n'); | |
if (lfIndex !== -1) { | |
string = stringEncaseCRLFWithFirstIndex(string, closeAll, openAll, lfIndex); | |
} | |
return openAll + string + closeAll; | |
}; | |
let template; | |
const chalkTag = (chalk, ...strings) => { | |
const [firstString] = strings; | |
if (!isArray(firstString) || !isArray(firstString.raw)) { | |
// If chalk() was called by itself or with a string, | |
// return the string itself as a string. | |
return strings.join(' '); | |
} | |
const arguments_ = strings.slice(1); | |
const parts = [firstString.raw[0]]; | |
for (let i = 1; i < firstString.length; i++) { | |
parts.push( | |
String(arguments_[i - 1]).replace(/[{}\\]/g, '\\$&'), | |
String(firstString.raw[i]) | |
); | |
} | |
if (template === undefined) { | |
template = require('./templates'); | |
} | |
return template(chalk, parts.join('')); | |
}; | |
Object.defineProperties(Chalk.prototype, styles); | |
const chalk = Chalk(); // eslint-disable-line new-cap | |
chalk.supportsColor = stdoutColor; | |
chalk.stderr = Chalk({level: stderrColor ? stderrColor.level : 0}); // eslint-disable-line new-cap | |
chalk.stderr.supportsColor = stderrColor; | |
module.exports = chalk; | |