--?   print('click', line_index, my, 'with line starting at', y, #line_cache.screen_line_starting_pos)  -- , #line_cache.screen_line_starting_posB)

--?     print('iter', y, screen_line_indexB, screen_line_starting_pos, string.sub(line.dataB, screen_line_starting_byte_offsetB))

--?     print('iter2', y, screen_line_indexB, screen_line_starting_posB, string.sub(line.dataB, screen_line_starting_byte_offsetB))

--?       print('aa', mx, State.left, Text.screen_line_widthB(State, line_index, screen_line_indexB))

--?     print('non-final', i)

    screen_line = string.sub(line.data, start_offsetB, past_end_offsetB-1)

--?     print('between', start_offsetB, past_end_offsetB)
    screen_line = string.sub(line.dataB, start_offsetB, past_end_offsetB-1)

    screen_line = string.sub(line.data, start_pos)

--?     print('final', i)
--?     print('after', start_offsetB)
    screen_line = string.sub(line.dataB, start_offsetB)

--?   local result = App.width(screen_line_text)
--?   print('=>', result)
--?   return result