while(current != synfig::String::npos)
{
// find end of first field (canvas) or return
synfig::String::size_type separator = canvas_window_size.find_first_of(' ', current);
while(current != synfig::String::npos)
{
// find end of first field (canvas) or return
synfig::String::size_type separator = canvas_window_size.find_first_of(' ', current);