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import ansiStyles from './ansi-styles';
import supportsColor from './supports-color';
import { stringReplaceAll, stringEncaseCRLFWithFirstIndex } from './utilities';
import { ChalkInstance } from './index.d';
const { stdout: stdoutColor, stderr: stderrColor } = supportsColor;
const GENERATOR = Symbol('GENERATOR');
const STYLER = Symbol('STYLER');
const IS_EMPTY = Symbol('IS_EMPTY');
// `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;
};
export class Chalk {
constructor(options) {
// eslint-disable-next-line no-constructor-return
return chalkFactory(options);
}
}
const chalkFactory = (options) => {
const chalk = (...strings) => strings.join(' ');
applyOptions(chalk, options);
Object.setPrototypeOf(chalk, createChalk.prototype);
return chalk;
};
function createChalk(options) {
return chalkFactory(options);
}
Object.setPrototypeOf(createChalk.prototype, Function.prototype);
for (const [styleName, style] of Object.entries(ansiStyles)) {
styles[styleName] = {
get() {
const builder = createBuilder(
this,
createStyler(style.open, style.close, this[STYLER]),
this[IS_EMPTY]
);
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 getModelAnsi = (model, level, type, ...arguments_) => {
if (model === 'rgb') {
if (level === 'ansi16m') {
return ansiStyles[type].ansi16m(...arguments_);
}
if (level === 'ansi256') {
return ansiStyles[type].ansi256(ansiStyles.rgbToAnsi256(...arguments_));
}
return ansiStyles[type].ansi(ansiStyles.rgbToAnsi(...arguments_));
}
if (model === 'hex') {
return getModelAnsi('rgb', level, type, ...ansiStyles.hexToRgb(...arguments_));
}
return ansiStyles[type][model](...arguments_);
};
const usedModels = ['rgb', 'hex', 'ansi256'];
for (const model of usedModels) {
styles[model] = {
get() {
const { level } = this;
return function (...arguments_) {
const styler = createStyler(
getModelAnsi(model, levelMapping[level], 'color', ...arguments_),
ansiStyles.color.close,
this[STYLER]
);
return createBuilder(this, styler, this[IS_EMPTY]);
};
},
};
const bgModel = 'bg' + model[0].toUpperCase() + model.slice(1);
styles[bgModel] = {
get() {
const { level } = this;
return function (...arguments_) {
const styler = createStyler(
getModelAnsi(model, levelMapping[level], 'bgColor', ...arguments_),
ansiStyles.bgColor.close,
this[STYLER]
);
return createBuilder(this, styler, this[IS_EMPTY]);
};
},
};
}
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) => {
// Single argument is hot path, implicit coercion is faster than anything
// eslint-disable-next-line no-implicit-coercion
const builder = (...arguments_) =>
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[IS_EMPTY] = _isEmpty;
return builder;
};
const applyStyle = (self, string) => {
if (self.level <= 0 || !string) {
return self[IS_EMPTY] ? '' : string;
}
let styler = self[STYLER];
if (styler === undefined) {
return string;
}
const { openAll, closeAll } = styler;
if (string.includes('\u001B')) {
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;
};
Object.defineProperties(createChalk.prototype, styles);
const chalk: ChalkInstance = createChalk();
export const chalkStderr = createChalk({ level: stderrColor ? stderrColor.level : 0 });
export { stdoutColor as supportsColor, stderrColor as supportsColorStderr };
export default chalk;