Re: "Final" version of tty child frames

[martin rudalics]

> Around xdisp.c:20500, there should be something like this in master:
>
>    /* Handle case where text has not changed, only point, and it has
>       not moved off the frame, and we are not retrying after hscroll.
>       (current_matrix_up_to_date_p is true when retrying.)  */
>    if (current_matrix_up_to_date_p
>        && (rc = try_cursor_movement (window, startp, &temp_scroll_step),
>      rc != CURSOR_MOVEMENT_CANNOT_BE_USED))
>      {
>
> What happens if you add "false && " to the if-condition so that the body
> isn't executed?

Doesn't help here (I have

  if (current_matrix_up_to_date_p
      && false
      && (rc = try_cursor_movement (window, startp, &temp_scroll_step),
          rc != CURSOR_MOVEMENT_CANNOT_BE_USED))

to make sure I did what you mean).

It's obvious that this _is_ a redisplay optimization trap.  But it's a
very sophisticated one because the cursor ends up at the correct end of
the line.  With other words C-f does what C-e does.

martin