* save-excursion or (let ((here (point)))
@ 2009-07-24 12:48 Lennart Borgman
2009-07-24 19:28 ` Stefan Monnier
0 siblings, 1 reply; 8+ messages in thread
From: Lennart Borgman @ 2009-07-24 12:48 UTC (permalink / raw)
To: Emacs-Devel devel
I got some problem with flickering when using (let ((here (point))) +
(goto-char here). I am not sure why.
What is the best way to just save the point? Should save-excursion be
used instead or is it perhaps slow?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-24 12:48 save-excursion or (let ((here (point))) Lennart Borgman
@ 2009-07-24 19:28 ` Stefan Monnier
2009-07-25 0:54 ` Lennart Borgman
0 siblings, 1 reply; 8+ messages in thread
From: Stefan Monnier @ 2009-07-24 19:28 UTC (permalink / raw)
To: Lennart Borgman; +Cc: Emacs-Devel devel
> I got some problem with flickering when using (let ((here (point))) +
> (goto-char here). I am not sure why.
If there's flickering, it means there's redisplay. You need to figure
out where/when that happens.
Stefan
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-24 19:28 ` Stefan Monnier
@ 2009-07-25 0:54 ` Lennart Borgman
2009-07-25 2:21 ` Miles Bader
0 siblings, 1 reply; 8+ messages in thread
From: Lennart Borgman @ 2009-07-25 0:54 UTC (permalink / raw)
To: Stefan Monnier; +Cc: Emacs-Devel devel
On Fri, Jul 24, 2009 at 9:28 PM, Stefan Monnier<monnier@iro.umontreal.ca> wrote:
>> I got some problem with flickering when using (let ((here (point))) +
>> (goto-char here). I am not sure why.
>
> If there's flickering, it means there's redisplay. You need to figure
> out where/when that happens.
Thanks. Sorry. I should have said "I can see the point moving and then
moving back sometimes". I am not sure if that can be avoided and that
is what I want to know.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-25 0:54 ` Lennart Borgman
@ 2009-07-25 2:21 ` Miles Bader
2009-07-25 10:08 ` Lennart Borgman
0 siblings, 1 reply; 8+ messages in thread
From: Miles Bader @ 2009-07-25 2:21 UTC (permalink / raw)
To: Lennart Borgman; +Cc: Stefan Monnier, Emacs-Devel devel
Lennart Borgman <lennart.borgman@gmail.com> writes:
>> If there's flickering, it means there's redisplay. You need to figure
>> out where/when that happens.
>
> Thanks. Sorry. I should have said "I can see the point moving and then
> moving back sometimes". I am not sure if that can be avoided and that
> is what I want to know.
That means you're doing redisplay inside the let body; you need to
figure out where/when that happens.
-Miles
--
Electricity, n. The cause of all natural phenomena not known to be caused by
something else.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-25 2:21 ` Miles Bader
@ 2009-07-25 10:08 ` Lennart Borgman
2009-07-25 10:38 ` martin rudalics
2009-07-25 14:44 ` Stefan Monnier
0 siblings, 2 replies; 8+ messages in thread
From: Lennart Borgman @ 2009-07-25 10:08 UTC (permalink / raw)
To: Miles Bader; +Cc: Stefan Monnier, Emacs-Devel devel
On Sat, Jul 25, 2009 at 4:21 AM, Miles Bader<miles@gnu.org> wrote:
> Lennart Borgman <lennart.borgman@gmail.com> writes:
>>> If there's flickering, it means there's redisplay. You need to figure
>>> out where/when that happens.
>>
>> Thanks. Sorry. I should have said "I can see the point moving and then
>> moving back sometimes". I am not sure if that can be avoided and that
>> is what I want to know.
>
> That means you're doing redisplay inside the let body; you need to
> figure out where/when that happens.
Thanks, but how do I know if a function triggers redisplay?
It looks to me that this might happen while calling `message' when it
displays more than one line, but I am not sure.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-25 10:08 ` Lennart Borgman
@ 2009-07-25 10:38 ` martin rudalics
2009-07-25 14:44 ` Stefan Monnier
1 sibling, 0 replies; 8+ messages in thread
From: martin rudalics @ 2009-07-25 10:38 UTC (permalink / raw)
To: Lennart Borgman; +Cc: Emacs-Devel devel, Stefan Monnier, Miles Bader
> Thanks, but how do I know if a function triggers redisplay?
You could try to bind `inhibit-redisplay' to t around calls and
see whether the flickering goes away.
martin
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-25 10:08 ` Lennart Borgman
2009-07-25 10:38 ` martin rudalics
@ 2009-07-25 14:44 ` Stefan Monnier
2009-07-26 0:27 ` Lennart Borgman
1 sibling, 1 reply; 8+ messages in thread
From: Stefan Monnier @ 2009-07-25 14:44 UTC (permalink / raw)
To: Lennart Borgman; +Cc: Emacs-Devel devel, Miles Bader
> Thanks, but how do I know if a function triggers redisplay?
Very few functions cause redisplay. The main ones are the ones that
wait (sleep, sit-for, read, ...).
Stefan
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: save-excursion or (let ((here (point)))
2009-07-25 14:44 ` Stefan Monnier
@ 2009-07-26 0:27 ` Lennart Borgman
0 siblings, 0 replies; 8+ messages in thread
From: Lennart Borgman @ 2009-07-26 0:27 UTC (permalink / raw)
To: Stefan Monnier; +Cc: Emacs-Devel devel, Miles Bader
On Sat, Jul 25, 2009 at 4:44 PM, Stefan Monnier<monnier@iro.umontreal.ca> wrote:
>> Thanks, but how do I know if a function triggers redisplay?
>
> Very few functions cause redisplay. The main ones are the ones that
> wait (sleep, sit-for, read, ...).
Thanks, the problem disappeared. I am not sure why. I don't think any
of the functions above where involved (I don't belive I am calling
them here).
I suspect that it had something to do with either error handling (I
was rewriting some code and the way I do that causes a lot of
errors...) or calling `message' with long lines that does not fit on
one line (these were trace messages used during the rewrite).
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2009-07-26 0:27 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-07-24 12:48 save-excursion or (let ((here (point))) Lennart Borgman
2009-07-24 19:28 ` Stefan Monnier
2009-07-25 0:54 ` Lennart Borgman
2009-07-25 2:21 ` Miles Bader
2009-07-25 10:08 ` Lennart Borgman
2009-07-25 10:38 ` martin rudalics
2009-07-25 14:44 ` Stefan Monnier
2009-07-26 0:27 ` Lennart Borgman
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