Add colors module (denoland/deno_std#30)

Original: https://github.com/denoland/deno_std/commit/54787f172c62df7c98d8e9e534c40e317825e614

1 files changed, 66 insertions, 0 deletions

diff --git a/colors/styles.ts b/colors/styles.ts
new file mode 100644
index 000000000..74f609b83
--- /dev/null
+++ b/colors/styles.ts
@@ -0,0 +1,66 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+const matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
+function escapeStringRegexp(str: string): string {
+  return str.replace(matchOperatorsRe, "\\$&");
+}
+
+const codes = {
+  reset: [0, 0],
+  bold: [1, 22],
+  dim: [2, 22],
+  italic: [3, 23],
+  underline: [4, 24],
+  inverse: [7, 27],
+  hidden: [8, 28],
+  strikethrough: [9, 29],
+
+  black: [30, 39],
+  red: [31, 39],
+  green: [32, 39],
+  yellow: [33, 39],
+  blue: [34, 39],
+  magenta: [35, 39],
+  cyan: [36, 39],
+  white: [37, 39],
+
+  blackBright: [90, 39],
+  redBright: [91, 39],
+  greenBright: [92, 39],
+  yellowBright: [93, 39],
+  blueBright: [94, 39],
+  magentaBright: [95, 39],
+  cyanBright: [96, 39],
+  whiteBright: [97, 39],
+
+  bgBlack: [40, 49],
+  bgRed: [41, 49],
+  bgGreen: [42, 49],
+  bgYellow: [43, 49],
+  bgBlue: [44, 49],
+  bgMagenta: [45, 49],
+  bgCyan: [46, 49],
+  bgWhite: [47, 49],
+
+  bgBlackBright: [100, 49],
+  bgRedBright: [101, 49],
+  bgGreenBright: [102, 49],
+  bgYellowBright: [103, 49],
+  bgBlueBright: [104, 49],
+  bgMagentaBright: [105, 49],
+  bgCyanBright: [106, 49],
+  bgWhiteBright: [107, 49]
+};
+
+type Styles<T> = {
+  [S in keyof T]: { open: string; close: string; closeRe: RegExp }
+};
+
+export const styles: Styles<typeof codes> = {} as any;
+
+for (const [style, [open, close]] of Object.entries(codes)) {
+  styles[style] = {
+    open: `\u001b[${open}m`,
+    close: `\u001b[${close}m`,
+    closeRe: new RegExp(escapeStringRegexp(`\u001b[${close}m`), "g")
+  };
+}