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