Re: "Final" version of tty child frames

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

> If we do that, i.e. set w->cursor.x negative, which is an indication
> that the cursor position of the window is unknown, we'd need to make
> sure set_cursor_from_row is called when the underlying frame is
> exposed.  So the separate-matrix alternative still sounds simpler.

>From the top of my head, I have some points though, that one would have
to take into account when using separate matrices:

- I don't know if the copying of root's matrix is fast enough to not be
  noticeable. I think it's well possible one won't notice anything, but if
  it is noticeable, one would have to arrange that the "terminal
  matrices" are only used in case we have a visible child frame. I don't
  have a clear picture of how complicated that would be.

- Tty menus work currently by saving/restoring the current frmae matrix,
  That would have to be adapted.

Maybe there are more.