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211 lines
4.5 KiB
TypeScript
211 lines
4.5 KiB
TypeScript
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// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/deps/colors/colors.ts
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// 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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/** RGB 8-bits per channel. Each in range `0->255` or `0x00->0xff` */
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interface Rgb {
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r: number;
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g: number;
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b: number;
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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[${open.join(";")}m`,
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close: `\x1b[${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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/* Special Color Sequences */
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function clampAndTruncate(n: number, max = 255, min = 0): number {
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return Math.trunc(Math.max(Math.min(n, max), min));
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}
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/** Set text color using paletted 8bit colors.
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* https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit */
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export function rgb8(str: string, color: number): string {
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return run(str, code([38, 5, clampAndTruncate(color)], 39));
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}
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/** Set background color using paletted 8bit colors.
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* https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit */
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export function bgRgb8(str: string, color: number): string {
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return run(str, code([48, 5, clampAndTruncate(color)], 49));
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}
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/** Set text color using 24bit rgb. */
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export function rgb24(str: string, color: Rgb): string {
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return run(
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str,
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code(
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[
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38,
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2,
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clampAndTruncate(color.r),
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clampAndTruncate(color.g),
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clampAndTruncate(color.b),
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],
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39
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)
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);
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}
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/** Set background color using 24bit rgb. */
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export function bgRgb24(str: string, color: Rgb): string {
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return run(
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str,
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code(
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[
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48,
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2,
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clampAndTruncate(color.r),
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clampAndTruncate(color.g),
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clampAndTruncate(color.b),
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],
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49
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)
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);
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}
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