From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Keith David Bershatsky <esq@lawlist.com>
Cc: michael_heerdegen@web.de, "Eli Zaretskii" <eliz@gnu.org>,
"Clément Pit--Claudel" <clement.pit@gmail.com>,
emacs-devel@gnu.org
Subject: Re: Use cases for post-redisplay hooks
Date: Mon, 04 Jul 2016 18:06:33 -0400 [thread overview]
Message-ID: <jwvpoqt6pgc.fsf-monnier+Inbox@gnu.org> (raw)
In-Reply-To: <m2k2h1dqqx.wl%esq@lawlist.com> (Keith David Bershatsky's message of "Mon, 04 Jul 2016 14:42:46 -0700")
> I am using a slightly modified version of Emacs that has what
> I call a `window-start-end-hook`, which lets me draw overlays on just the
> visible window every command loop. I needs more work, but that is the
> general idea of the modification.
Could you clarify what you use it for?
Also is it run after redisplay? If so, how does it work? I mean how do
you add overlays *after* redisplay? Do you trigger a second redisplay
right after the first, or is it simply that your overlays don't affect
the display?
> There are certain movements of point that are not covered by the
> `window-scroll-functions` hook, so that hook cannot be used reliably for the
> above-mentioned purpose.
Not sure what point has to do with window-start-end-hook.
> And, the hook *may* run more than once each command loop, leading to
> potentially wasted time spent running an overlay function that will
> need to run again anyway before the display cycle finishes.
Is that a problem in practice?
Stefan
next prev parent reply other threads:[~2016-07-04 22:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-04 21:42 Use cases for post-redisplay hooks Keith David Bershatsky
2016-07-04 22:06 ` Stefan Monnier [this message]
2016-07-05 2:35 ` Eli Zaretskii
-- strict thread matches above, loose matches on Subject: below --
2016-07-07 20:19 Keith David Bershatsky
2016-07-07 17:53 Keith David Bershatsky
2016-07-07 19:44 ` Clément Pit--Claudel
2016-07-05 17:45 Keith David Bershatsky
2016-07-04 22:50 Keith David Bershatsky
2016-07-05 8:12 ` Stefan Monnier
2016-07-07 16:08 ` Clément Pit--Claudel
2016-07-04 16:39 Clément Pit--Claudel
2016-07-04 17:02 ` Eli Zaretskii
2016-07-04 17:15 ` Clément Pit--Claudel
2016-07-04 21:45 ` Stefan Monnier
2016-07-10 22:17 ` Clément Pit--Claudel
2016-07-11 3:34 ` Stefan Monnier
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