line.screen_line_starting_pos = nil

--?     print('single screen line')

--?   print('move_cursor', mx, my)
  if my < line.y + math.floor(15*Zoom) then
--?     print('first screen line')
    Cursor_pos = Text.nearest_cursor_pos(line.data, mx)
    return
  end

  for _,screen_line_starting_pos in ipairs(line.screen_line_starting_pos) do
--?     print('screen line:', screen_line_starting_pos)

  for screen_line_index,screen_line_starting_pos in ipairs(line.screen_line_starting_pos) do

      -- On all wrapped screen lines but the final one, clicks past end of
      -- line position cursor on final character of screen line.
      -- (The final screen line positions past end of screen line as always.)
      if mx > Line_width and screen_line_index < #line.screen_line_starting_pos then
        Cursor_pos = line.screen_line_starting_pos[screen_line_index+1] - 1
        return
      end

click to right of text -> cursor past end of line
click to right of wrapped text -> cursor on final character of line