Function getHexStyle

lib/util.js:163–177

* Returns the cached ANSI escape sequences for a hex color. * Computes and caches on first use to avoid repeated Buffer allocations. * @param {string} hex A valid hex color string (#RGB or #RRGGBB) * @returns {{openSeq: string, closeSeq: string}}

(hex)

 * @returns {{openSeq: string, closeSeq: string}}
 */
function getHexStyle(hex) {
  const cache = getHexStyleCache();
  const cached = cache.get(hex);
  if (cached !== undefined) return cached;
  const { 0: r, 1: g, 2: b } = hexToRgb(hex);
  const style = {
    __proto__: null,
    openSeq: kEscape + rgbToAnsi24Bit(r, g, b) + kEscapeEnd,
    closeSeq: kHexCloseSeq,
  };
  if (cache.size >= kHexStyleCacheMax)
    cache.delete(cache.keys().next().value);
  cache.set(hex, style);
  return style;
}

function replaceCloseCode(str, closeSeq, openSeq, keepClose) {
  const closeLen = closeSeq.length;