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Re: Stop frames stealing eachothers' minibuffers!
From: |
Alan Mackenzie |
Subject: |
Re: Stop frames stealing eachothers' minibuffers! |
Date: |
Sat, 14 Nov 2020 18:48:58 +0000 |
Hello, Eli.
On Sat, Nov 14, 2020 at 19:12:24 +0200, Eli Zaretskii wrote:
> > Date: Sat, 14 Nov 2020 15:36:43 +0200
> > From: Eli Zaretskii <eliz@gnu.org>
> > Cc: enometh@meer.net, monnier@iro.umontreal.ca, andreyk.mad@gmail.com,
> > emacs-devel@gnu.org
> > > Date: Wed, 11 Nov 2020 20:37:16 +0000
> > > Cc: Andrii Kolomoiets <andreyk.mad@gmail.com>, monnier@iro.umontreal.ca,
> > > enometh@meer.net, emacs-devel@gnu.org
> > > From: Alan Mackenzie <acm@muc.de>
> > > > > C-x 5 2
> > > > > M-x
> > > > > C-x 5 o
> > > > > M-x
> > > > > With the default setting of `enable-recursive-minibuffers`, the
> > > > > minibuffer is moved to active frame, but the error message is
> > > > > displayed
> > > > > in the other frame.
> > > > Arguably a bug. Alan, could you please look into this?
> > > I think this is a bug, too.
> > > I've been looking at the C sources for some while but haven't found
> > > anything useful. I've tried setting echo_area_window during the frame
> > > change, but this doesn't have any visible effect.
> > > I'll carry on with the diagnosis. Any quick tips would be welcome.
> > My guess is that this is somehow related to the fact that error
> > messages are displayed as part of handling an error signal, which
> > causes a throw to top level.
> Specifically, read-from-minibuffer (called when we type the first M-x)
> binds some variables, then enters recursive-edit. When the error
> unwinds the stack, it restores the original window configuration,
> which includes the frame which was selected back then. And that
> undoes the effect of "C-x 5 o", so the error message is displayed on
> the original frame.
Thanks! I was approaching the same conclusion myself, but much more
slowly than you. ;-)
Arguably, Fset_window_configuration selecting the pertinent frame is a
bug in the specification of that function - one should be able to restore
a frame's configuration without selecting the frame as well. However,
backwards compatibility, and all that....
I propose fixing the bug at the place where read_minibuf saves the frame
configuration. As well as saving that frame configuration, it should
additionally save another Lisp_Object for which nil means "restore the
selected frame", non-nil means "don't restore it".
Fset_window_configuration would acquire an extra &optional parameter with
the same meaning.
The function restore_window_configuration, frustratingly, is used in only
one place apart from read_minibuf, and that is in an obsolete byte code
in bytecode.c.
What do you think?
--
Alan Mackenzie (Nuremberg, Germany).
- Re: Stop frames stealing eachothers' minibuffers!, (continued)
- Re: Stop frames stealing eachothers' minibuffers!, Stefan Monnier, 2020/11/10
- Re: Stop frames stealing eachothers' minibuffers!, Andrii Kolomoiets, 2020/11/10
- Re: Stop frames stealing eachothers' minibuffers!, Stefan Monnier, 2020/11/10
- Re: Stop frames stealing eachothers' minibuffers!, Andrii Kolomoiets, 2020/11/11
- Re: Stop frames stealing eachothers' minibuffers!, Eli Zaretskii, 2020/11/11
- Re: Stop frames stealing eachothers' minibuffers!, Alan Mackenzie, 2020/11/11
- Re: Stop frames stealing eachothers' minibuffers!, Eli Zaretskii, 2020/11/14
- Re: Stop frames stealing eachothers' minibuffers!, Eli Zaretskii, 2020/11/14
- Re: Stop frames stealing eachothers' minibuffers!,
Alan Mackenzie <=
- Re: Stop frames stealing eachothers' minibuffers!, Eli Zaretskii, 2020/11/14
- Re: Stop frames stealing eachothers' minibuffers!, martin rudalics, 2020/11/14
- Re: Stop frames stealing eachothers' minibuffers!, Alan Mackenzie, 2020/11/14
- Re: Stop frames stealing eachothers' minibuffers!, martin rudalics, 2020/11/15
- Re: Stop frames stealing eachothers' minibuffers!, Alan Mackenzie, 2020/11/19
- Re: Stop frames stealing eachothers' minibuffers!, Andrii Kolomoiets, 2020/11/19
- Re: Stop frames stealing eachothers' minibuffers!, Alan Mackenzie, 2020/11/19
- Re: Stop frames stealing eachothers' minibuffers!, martin rudalics, 2020/11/20
- Re: Stop frames stealing eachothers' minibuffers!, Alan Mackenzie, 2020/11/20
- Re: Stop frames stealing eachothers' minibuffers!, Stefan Monnier, 2020/11/20