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148 lines
3 KiB
TypeScript
148 lines
3 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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/**
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* A module to print ANSI terminal colors. Inspired by chalk, kleur, and colors
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* on npm.
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*
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* ```
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* import { bgBlue, red, bold } from "https://deno.land/std/fmt/colors.ts";
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* console.log(bgBlue(red(bold("Hello world!"))));
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* ```
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*
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* This module supports `NO_COLOR` environmental variable disabling any coloring
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* if `NO_COLOR` is set.
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*/
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const { noColor } = Deno;
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interface Code {
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open: string;
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close: string;
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regexp: RegExp;
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}
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let enabled = !noColor;
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export function setColorEnabled(value: boolean): void {
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if (noColor) {
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return;
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}
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enabled = value;
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}
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export function getColorEnabled(): boolean {
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return enabled;
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}
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function code(open: number, close: number): Code {
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return {
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open: `\x1b[${open}m`,
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close: `\x1b[${close}m`,
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regexp: new RegExp(`\\x1b\\[${close}m`, "g"),
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};
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}
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function run(str: string, code: Code): string {
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return enabled
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? `${code.open}${str.replace(code.regexp, code.open)}${code.close}`
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: str;
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}
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export function reset(str: string): string {
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return run(str, code(0, 0));
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}
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export function bold(str: string): string {
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return run(str, code(1, 22));
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}
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export function dim(str: string): string {
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return run(str, code(2, 22));
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}
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export function italic(str: string): string {
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return run(str, code(3, 23));
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}
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export function underline(str: string): string {
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return run(str, code(4, 24));
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}
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export function inverse(str: string): string {
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return run(str, code(7, 27));
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}
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export function hidden(str: string): string {
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return run(str, code(8, 28));
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}
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export function strikethrough(str: string): string {
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return run(str, code(9, 29));
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}
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export function black(str: string): string {
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return run(str, code(30, 39));
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}
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export function red(str: string): string {
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return run(str, code(31, 39));
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}
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export function green(str: string): string {
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return run(str, code(32, 39));
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}
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export function yellow(str: string): string {
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return run(str, code(33, 39));
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}
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export function blue(str: string): string {
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return run(str, code(34, 39));
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}
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export function magenta(str: string): string {
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return run(str, code(35, 39));
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}
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export function cyan(str: string): string {
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return run(str, code(36, 39));
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}
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export function white(str: string): string {
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return run(str, code(37, 39));
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}
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export function gray(str: string): string {
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return run(str, code(90, 39));
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}
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export function bgBlack(str: string): string {
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return run(str, code(40, 49));
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}
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export function bgRed(str: string): string {
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return run(str, code(41, 49));
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}
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export function bgGreen(str: string): string {
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return run(str, code(42, 49));
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}
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export function bgYellow(str: string): string {
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return run(str, code(43, 49));
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}
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export function bgBlue(str: string): string {
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return run(str, code(44, 49));
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}
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export function bgMagenta(str: string): string {
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return run(str, code(45, 49));
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}
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export function bgCyan(str: string): string {
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return run(str, code(46, 49));
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}
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export function bgWhite(str: string): string {
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return run(str, code(47, 49));
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}
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