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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license./** * A module to print ANSI terminal colors. Inspired by chalk, kleur, and colors * on npm. * * ``` * import { bgBlue, red, bold } from "https://deno.land/std/fmt/colors.ts"; * console.log(bgBlue(red(bold("Hello world!")))); * ``` * * This module supports `NO_COLOR` environmental variable disabling any coloring * if `NO_COLOR` is set. */const { noColor } = Deno;
interface Code {  open: string;  close: string;  regexp: RegExp;}
/** RGB 8-bits per channel. Each in range `0->255` or `0x00->0xff` */interface Rgb {  r: number;  g: number;  b: number;}
let enabled = !noColor;
export function setColorEnabled(value: boolean): void {  if (noColor) {    return;  }
  enabled = value;}
export function getColorEnabled(): boolean {  return enabled;}
function code(open: number[], close: number): Code {  return {    open: `\x1b[${open.join(";")}m`,    close: `\x1b[${close}m`,    regexp: new RegExp(`\\x1b\\[${close}m`, "g"),  };}
function run(str: string, code: Code): string {  return enabled    ? `${code.open}${str.replace(code.regexp, code.open)}${code.close}`    : str;}
export function reset(str: string): string {  return run(str, code([0], 0));}
export function bold(str: string): string {  return run(str, code([1], 22));}
export function dim(str: string): string {  return run(str, code([2], 22));}
export function italic(str: string): string {  return run(str, code([3], 23));}
export function underline(str: string): string {  return run(str, code([4], 24));}
export function inverse(str: string): string {  return run(str, code([7], 27));}
export function hidden(str: string): string {  return run(str, code([8], 28));}
export function strikethrough(str: string): string {  return run(str, code([9], 29));}
export function black(str: string): string {  return run(str, code([30], 39));}
export function red(str: string): string {  return run(str, code([31], 39));}
export function green(str: string): string {  return run(str, code([32], 39));}
export function yellow(str: string): string {  return run(str, code([33], 39));}
export function blue(str: string): string {  return run(str, code([34], 39));}
export function magenta(str: string): string {  return run(str, code([35], 39));}
export function cyan(str: string): string {  return run(str, code([36], 39));}
export function white(str: string): string {  return run(str, code([37], 39));}
export function gray(str: string): string {  return run(str, code([90], 39));}
export function bgBlack(str: string): string {  return run(str, code([40], 49));}
export function bgRed(str: string): string {  return run(str, code([41], 49));}
export function bgGreen(str: string): string {  return run(str, code([42], 49));}
export function bgYellow(str: string): string {  return run(str, code([43], 49));}
export function bgBlue(str: string): string {  return run(str, code([44], 49));}
export function bgMagenta(str: string): string {  return run(str, code([45], 49));}
export function bgCyan(str: string): string {  return run(str, code([46], 49));}
export function bgWhite(str: string): string {  return run(str, code([47], 49));}
/* Special Color Sequences */
function clampAndTruncate(n: number, max = 255, min = 0): number {  return Math.trunc(Math.max(Math.min(n, max), min));}
/** Set text color using paletted 8bit colors. * https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit */export function rgb8(str: string, color: number): string {  return run(str, code([38, 5, clampAndTruncate(color)], 39));}
/** Set background color using paletted 8bit colors. * https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit */export function bgRgb8(str: string, color: number): string {  return run(str, code([48, 5, clampAndTruncate(color)], 49));}
/** Set text color using 24bit rgb. */export function rgb24(str: string, color: Rgb): string {  return run(    str,    code(      [        38,        2,        clampAndTruncate(color.r),        clampAndTruncate(color.g),        clampAndTruncate(color.b),      ],      39    )  );}
/** Set background color using 24bit rgb. */export function bgRgb24(str: string, color: Rgb): string {  return run(    str,    code(      [        48,        2,        clampAndTruncate(color.r),        clampAndTruncate(color.g),        clampAndTruncate(color.b),      ],      49    )  );}