'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 supportsColor = require('supports-color');
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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 = supportsColor ? supportsColor.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 = supportsColor;
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module.exports.default = module.exports; // For TypeScript
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