Function applyFnOutsideInlineCode

actions/setup/js/sanitize_content_core.cjs:471–532

* Applies a transformation function to a text segment while skipping inline code spans * (backtick-delimited sequences). The transformation is applied to each run of * non-code text; inline code spans are preserved verbatim. * * @param {string} text - The text to process (should not contain fen

(text, fn)

 * @returns {string} The processed text
 */
function applyFnOutsideInlineCode(text, fn) {
  if (!text) return fn(text || "");

  const parts = [];
  let i = 0;
  let textStart = 0;

  while (i < text.length) {
    if (text[i] !== "`") {
      i++;
      continue;
    }

    // Count consecutive backticks at the current position
    const btStart = i;
    let btCount = 0;
    while (i < text.length && text[i] === "`") {
      btCount++;
      i++;
    }
    // i is now past the opening backtick sequence

    // Look for the matching closing sequence of exactly btCount backticks
    let closeIdx = -1;
    let j = i;
    while (j < text.length) {
      if (text[j] === "`") {
        let closeCount = 0;
        const jStart = j;
        while (j < text.length && text[j] === "`") {
          closeCount++;
          j++;
        }
        if (closeCount === btCount) {
          closeIdx = jStart;
          break;
        }
        // Different length – keep scanning (j already advanced past these backticks)
      } else {
        j++;
      }
    }

    if (closeIdx !== -1) {
      // Valid inline code span found: apply fn to the text before it, then keep the code span
      if (textStart < btStart) {
        parts.push(fn(text.slice(textStart, btStart)));
      }
      parts.push(text.slice(btStart, closeIdx + btCount));
      textStart = closeIdx + btCount;
      i = textStart;
    }
    // If no matching close was found, the backticks are treated as regular text (i already advanced)
  }

  // Apply fn to any remaining non-code text
  if (textStart < text.length) {
    parts.push(fn(text.slice(textStart)));