undo method

bool undo({
  1. required State captureState(),
  2. required void restoreState(
    1. State state
    ),
})

Implementation

bool undo({
  required State Function() captureState,
  required void Function(State state) restoreState,
}) {
  if (_undoStack.isEmpty) {
    return false;
  }

  breakCoalescing();
  final current = captureState();
  final previous = _undoStack.removeLast();
  _redoStack.add(current);
  restoreState(previous);
  return true;
}