Re: Stop frames stealing eachothers' minibuffers!

[Eli Zaretskii]

> Date: Wed, 17 Mar 2021 21:55:38 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: monnier@iro.umontreal.ca, jakanakaevangeli@chiru.no, emacs-devel@gnu.org
> 
> > This could be difficult to fix.  I don't think that clicking on the last
> > frame's close button goes through `delete-frame' - it just closes the
> > program, whether that's emacs or emacsclient.
> 
> I'm not sure I understand completely what you say here, but clicking
> on the frame's close button does invoke delete-frame, see the handling
> of DELETE_FRAME_EVENT in keyboard.c.

And if you are talking about the last live frame of an Emacs session,
then look at handle-delete-frame, which is called when you click that
close button: it will call save-buffers-kill-emacs (which has a hook)
and then kill-emacs (which also has a hook).