encodeRemotePlan function

Uint8List encodeRemotePlan(RemotePlan plan)

Encodes a RemotePlan to wire bytes.

Wire shape (the cell-patch design): only the changed column ranges ship, each as runs grouped by style, with styles deduplicated into a per-frame table referenced by varint index. Integers are varints. This keeps the wire close to "only changed cells, style once per run" — the efficiency ANSI gets implicitly — so it stays competitive with (and usually beats) a deflated ANSI stream over the socket.

Implementation

Uint8List encodeRemotePlan(RemotePlan plan) {
  final w = _Writer();
  var flags = 0;
  if (plan.fullRepaint) flags |= 1;
  if (plan.scrollUpRows != null) flags |= 2;
  w
    ..u8(flags)
    ..varint(plan.size.cols)
    ..varint(plan.size.rows);
  if (plan.scrollUpRows != null) w.varint(plan.scrollUpRows!);
  w.varint(plan.styleTable.length);
  for (final style in plan.styleTable) {
    _writeStyle(w, style);
  }
  w.varint(plan.patches.length);
  for (final patch in plan.patches) {
    w
      ..varint(patch.row)
      ..varint(patch.startCol)
      ..varint(patch.runs.length);
    for (final run in patch.runs) {
      w
        ..varint(run.styleIndex)
        ..vstr(run.text);
    }
  }
  w.varint(plan.placements.length);
  for (final p in plan.placements) {
    w
      ..vstr(p.id)
      ..varint(p.row)
      ..varint(p.col)
      ..varint(p.cols)
      ..varint(p.rows)
      ..varint(p.fit.index)
      ..varint(p.boxCols)
      ..varint(p.boxRows)
      ..varint(p.boxOffsetCol)
      ..varint(p.boxOffsetRow);
  }
  return w.take();
}