collectAllIndividualStyles method

List<Tuple2<int, Style>> collectAllIndividualStyles(int offset, int len, { int beg = 0, })

Returns each node segment's offset in selection with its corresponding style as a list

Implementation

List<Tuple2<int, Style>> collectAllIndividualStyles(int offset, int len,
    {int beg = 0}) {
  final local = math.min(length - offset, len);
  final result = <Tuple2<int, Style>>[];

  final data = queryChild(offset, true);
  var node = data.node as Leaf?;
  if (node != null) {
    var pos = 0;
    if (node is Text) {
      pos = node.length - data.offset;
      result.add(Tuple2(beg, node.style));
    }
    while (!node!.isLast && pos < local) {
      node = node.next as Leaf;
      if (node is Text) {
        result.add(Tuple2(pos + beg, node.style));
        pos += node.length;
      }
    }
  }

  // TODO: add line style and parent's block style

  final remaining = len - local;
  if (remaining > 0 && nextLine != null) {
    final rest =
        nextLine!.collectAllIndividualStyles(0, remaining, beg: local);
    result.addAll(rest);
  }

  return result;
}