Function nextText

src/static/js/Changeset.ts:1378–1394

(numChars: number)

  };

  const nextText = (numChars: number) => {
    let len = 0;
    const assem = new StringAssembler();
    const firstString = linesGet(curLine).substring(curChar);
    len += firstString.length;
    assem.append(firstString);

    let lineNum = curLine + 1;
    while (len < numChars) {
      const nextString = linesGet(lineNum);
      len += nextString.length;
      assem.append(nextString);
      lineNum++;
    }

    return assem.toString().substring(0, numChars);
  };

  const cachedStrFunc = (func: Function) => {
    const cache:{