Function locateSpan

lib/redact-engine.ts:482–500

(input: string, f: Finding)

}

function locateSpan(input: string, f: Finding): { start: number; end: number } {
  // Re-derive the offset from line/col on the original text.
  let offset = 0;
  let line = 1;
  while (line < f.line && offset < input.length) {
    if (input[offset] === "\n") line++;
    offset++;
  }
  offset += f.col - 1;
  const pat = PATTERNS_BY_ID[f.id];
  if (!pat) return { start: -1, end: -1 };
  const re = new RegExp(pat.regex.source, withFlags(pat.regex.flags));
  re.lastIndex = Math.max(0, offset - 2);
  const m = re.exec(input);
  if (!m) return { start: -1, end: -1 };
  const span = m[1] ?? m[0];
  const start = m.index + (m[1] !== undefined ? m[0].indexOf(m[1]) : 0);
  return { start, end: start + span.length };
}

function inStructuralToken(body: string, start: number, end: number): boolean {
  // Markdown link target: [text](...span...). The span may sit anywhere inside