if State.screen_top1.line > 1 then

    while State.screen_top1.line > 1 do

      if should_show(State.lines[State.screen_top1.line]) then
        break
      end

    if State.screen_top1.line < #State.lines then

    while State.screen_top1.line < #State.lines do

      if should_show(State.lines[State.screen_top1.line]) then
        break
      end

      y = y + tenonauger.height(State, State.screen_top1.line)

      if should_show(State.lines[State.screen_top1.line]) then
        y = y + tenonauger.height(State, State.screen_top1.line)
      end

      y = y + tenonauger.height(State, State.screen_top1.line)

      if should_show(State.lines[State.screen_top1.line]) then
        y = y + tenonauger.height(State, State.screen_top1.line)
      end