From: gerd.moellmann@t-online.de (Gerd Moellmann)
Cc: rms@gnu.org, emacs-devel@gnu.org
Subject: Re: question about frame local variable
Date: 30 Oct 2003 10:33:03 +0100 [thread overview]
Message-ID: <86k76njcj4.fsf@gerd.free-bsd.org> (raw)
In-Reply-To: <200310300135.KAA09225@etlken.m17n.org>
Kenichi Handa <handa@m17n.org> writes:
> CCed to Gerd.
>
> In article <200310280803.RAA05883@etlken.m17n.org>, Kenichi Handa <handa@m17n.org> writes:
> > Ideally, I think selecte-frame should change the value of
> > Vscalable_fonts_allowed when that has frame local binding.
> > Then, C code can simply refer to this variable to get the
> > current value.
>
> I found that the above is not enough. It seems that the
> display engine doesn't issue select-frame; i.e. provided
> that there are two frames A and B, there is a case that the
> display engine redisplays A while the selected frame is B.
>
> It means that even if we make such variables frame local
> that affect the redisplaying (font-selection, etc), any
> frame local bindings are just ignored.
>
> Gerd, do you remember this matter? Is my analysis correct?
I think so; it matches what I remember. Local bindings are not
supported for all redisplay variables. AFAIR, that has always
been the case and isn't new in 21. Where it is supported,
I think redisplay looks at frame parameters.
(BTW, calling select-frame in redisplay would almost certainly not be
the right thing to do, which probably gets obvious when taking a look
at what that function does.)
next prev parent reply other threads:[~2003-10-30 9:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-25 0:49 question about frame local variable Kenichi Handa
2003-10-26 11:46 ` Richard Stallman
2003-10-28 8:03 ` Kenichi Handa
2003-10-30 1:35 ` Kenichi Handa
2003-10-30 9:33 ` Gerd Moellmann [this message]
2003-10-30 10:46 ` Kenichi Handa
2003-10-30 16:27 ` Stefan Monnier
2003-10-30 19:33 ` Gerd Moellmann
2003-11-10 1:05 ` Kenichi Handa
2003-11-10 10:35 ` Gerd Moellmann
2003-11-11 8:38 ` Kenichi Handa
2003-11-12 20:02 ` Richard Stallman
2003-11-13 0:42 ` Kenichi Handa
2003-11-13 4:14 ` Richard Stallman
2003-11-13 4:32 ` Kenichi Handa
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