query method

EasyTextList query(int start, int length)

Get a sublist of texts starting from start index with the given length.

Implementation

EasyTextList query(int start, int length) {
  final EasyTextList result = EasyTextList();
  int offset = 0;
  int remain = length;
  // probably i can just use extractAt, but
  // i prefer just making this manually
  for (final EasyText text in this) {
    if (offset + text.length <= start) {
      offset += text.length;
      continue;
    }
    if (remain <= 0) break;
    final int localStart = math.max(0, start - offset);
    final int localEnd = math.min(
      text.length,
      localStart + remain,
    );
    if (localEnd > localStart) {
      result.add(
        text.copyWith(text: text.between(localStart, localEnd)),
      );
      remain -= (localEnd - localStart);
    }
    offset += text.length;
  }
  return result;
}