Function replaceUsingRegExp

client-src/overlay.js:27–50

(macroText, macroRegExp, macroReplacer)

 * @returns {string} result
 */
const replaceUsingRegExp = (macroText, macroRegExp, macroReplacer) => {
  macroRegExp.lastIndex = 0;
  let replaceMatch = macroRegExp.exec(macroText);
  let replaceResult;
  if (replaceMatch) {
    replaceResult = "";
    let replaceLastIndex = 0;
    do {
      if (replaceLastIndex !== replaceMatch.index) {
        replaceResult += macroText.slice(replaceLastIndex, replaceMatch.index);
      }
      const replaceInput = replaceMatch[0];
      replaceResult += macroReplacer(replaceInput);
      replaceLastIndex = replaceMatch.index + replaceInput.length;
    } while ((replaceMatch = macroRegExp.exec(macroText)));

    if (replaceLastIndex !== macroText.length) {
      replaceResult += macroText.slice(replaceLastIndex);
    }
  } else {
    replaceResult = macroText;
  }
  return replaceResult;
};

const references = {
  "<": "&lt;",