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Fix stripping hex color formatting

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Hex colors can be set with the same formats as the regular colors:
<CODE>, <CODE><COLOR>, or <CODE><COLOR>,<COLOR>.

Previously we only supporteed <CODE><COLOR>.

This patch enables stripping colors for all valid color formats.

Co-authored-by: Simon Ser <contact@emersion.fr>
This commit is contained in:
delthas 2022-10-02 16:18:33 +02:00 committed by Simon Ser
parent 3f059567c5
commit 081f5743be
1 changed files with 23 additions and 1 deletions
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24
lib/ansi.js
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@ -10,10 +10,26 @@ const COLOR_HEX = "\x04";
const REVERSE_COLOR = "\x16";
const RESET = "\x0F";
const HEX_COLOR_LENGTH = 6;
function isDigit(ch) {
return ch >= "0" && ch <= "9";
}
function isHexColor(text) {
if (text.length < HEX_COLOR_LENGTH) {
return false;
}
for (let i = 0; i < HEX_COLOR_LENGTH; i++) {
let ch = text[i].toUpperCase();
let ok = (ch >= "0" && ch <= "9") || (ch >= "A" && ch <= "F");
if (!ok) {
return false;
}
}
return true;
}
export function strip(text) {
let out = "";
for (let i = 0; i < text.length; i++) {
@ -43,7 +59,13 @@ export function strip(text) {
}
break;
case COLOR_HEX:
i += 6;
if (!isHexColor(text.slice(i + 1))) {
break;
}
i += HEX_COLOR_LENGTH;
if (text[i + 1] == "," && isHexColor(text.slice(i + 2))) {
i += 1 + HEX_COLOR_LENGTH;
}
break;
default:
out += ch;