Re: Question about minibuffer and child frames (Posframe)

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: Emacs Devel <emacs-devel@gnu.org>
> Date: Wed, 02 Oct 2024 19:17:33 +0200
> 
> martin rudalics <rudalics@gmx.at> writes:
> 
> > The modeline of the "Completions* window seems to have the same
> > background as the modeline of the normal frame's *scratch* window.
> > Doesn't that hint at redisplay believing that both windows are the
> > selected one?
> 
> Probably. They are the (frame-selected-window) of their respective
> frames. I guess that has previously not been possible to see on a tty.
> Cab't check at the moment--I've made me a todo to check if xdisp.c does
> this differently on ttys.

I think the starting point is the macro
CURRENT_MODE_LINE_ACTIVE_FACE_ID_3, which is used to determine which
face to use for the mode line of a window.