bolt-engine/node_modules/chalk/index.js
2015-01-22 22:56:00 +03:30

96 lines
2.2 KiB
JavaScript

'use strict';
var escapeStringRegexp = require('escape-string-regexp');
var ansiStyles = require('ansi-styles');
var stripAnsi = require('strip-ansi');
var hasAnsi = require('has-ansi');
var supportsColor = require('supports-color');
var defineProps = Object.defineProperties;
var chalk = module.exports;
function build(_styles) {
var builder = function builder() {
return applyStyle.apply(builder, arguments);
};
builder._styles = _styles;
// __proto__ is used because we must return a function, but there is
// no way to create a function with a different prototype.
builder.__proto__ = proto;
return builder;
}
var styles = (function () {
var ret = {};
ansiStyles.grey = ansiStyles.gray;
Object.keys(ansiStyles).forEach(function (key) {
ansiStyles[key].closeRe = new RegExp(escapeStringRegexp(ansiStyles[key].close), 'g');
ret[key] = {
get: function () {
return build(this._styles.concat(key));
}
};
});
return ret;
})();
var proto = defineProps(function chalk() {}, styles);
function applyStyle() {
// support varags, but simply cast to string in case there's only one arg
var args = arguments;
var argsLen = args.length;
var str = argsLen !== 0 && String(arguments[0]);
if (argsLen > 1) {
// don't slice `arguments`, it prevents v8 optimizations
for (var a = 1; a < argsLen; a++) {
str += ' ' + args[a];
}
}
if (!chalk.enabled || !str) {
return str;
}
/*jshint validthis: true*/
var nestedStyles = this._styles;
for (var i = 0; i < nestedStyles.length; i++) {
var code = ansiStyles[nestedStyles[i]];
// 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'.
str = code.open + str.replace(code.closeRe, code.open) + code.close;
}
return str;
}
function init() {
var ret = {};
Object.keys(styles).forEach(function (name) {
ret[name] = {
get: function () {
return build([name]);
}
};
});
return ret;
}
defineProps(chalk, init());
chalk.styles = ansiStyles;
chalk.hasColor = hasAnsi;
chalk.stripColor = stripAnsi;
chalk.supportsColor = supportsColor;
// detect mode if not set manually
if (chalk.enabled === undefined) {
chalk.enabled = chalk.supportsColor;
}