feat: ansi regex & escape

ansi_regex.ts

@@ -0,0 +1,7 @@
+export function ansiRegex({ onlyFirst = false } = {}): RegExp {
+  const pattern = [
+    "[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:[a-zA-Z\\d]*(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)",
+    "(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-ntqry=><~]))",
+  ].join("|");
+  return new RegExp(pattern, onlyFirst ? undefined : "g");
+}

mod.ts

@@ -39,3 +39,5 @@ export type AsyncStream = Deno.Writer;
 export * from "./tty_async.ts";
 export * from "./tty_sync.ts";
 export * from "./wcwidth.ts";
+export * from "./ansi_regex.ts";
+export * from "./strip_ansi.ts";

strip_ansi.ts

@@ -0,0 +1,5 @@
+import { ansiRegex } from "./mod.ts";
+
+export function stripAnsi(dirty: string): string {
+  return dirty.replace(ansiRegex(), "");
+}

wcwidth.ts

@@ -29,7 +29,7 @@ export type Defaults = {
  *  This implementation assumes that characters are encoded in ISO 10646.
  */
 export function wcswidth(
-  str: any,
+  str: string,
   { nul = 0, control = 0 }: Defaults = {},
 ): number {
   const opts = { nul, control };
@@ -45,7 +45,7 @@ export function wcswidth(
   return s;
 }
 
-function wcwidth(ucs: any, { nul = 0, control = 0 }: Defaults = {}): number {
+function wcwidth(ucs: number, { nul = 0, control = 0 }: Defaults = {}): number {
   // test for 8-bit control characters
   if (ucs === 0) return nul;
   if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) return control;
@@ -74,7 +74,7 @@ function wcwidth(ucs: any, { nul = 0, control = 0 }: Defaults = {}): number {
   );
 }
 
-function bisearch(ucs: any): boolean {
+function bisearch(ucs: number): boolean {
   var min = 0;
   var max = combining.length - 1;
   var mid;