From: Michael Heerdegen <michael_heerdegen@web.de>
To: help-gnu-emacs@gnu.org
Subject: Re: are there hooks for text becoming visible or hidden in a given window?
Date: Fri, 25 Feb 2022 03:42:12 +0100 [thread overview]
Message-ID: <87a6efr7jv.fsf@web.de> (raw)
In-Reply-To: 06e7c939da37479902e9a935fbaf487a@basiscraft.com
Thomas Lord <lord@basiscraft.com> writes:
> I couldn't find anything like this and I don't see a clean
> alternative.
Reminds me of the task I had to solve when implementing "on-screen.el" -
a package that indicates the formerly visible region after scrolling a
window. What you want is nearly the same: observe the visible region of
a window, do something (involving redisplay) when it changes.
It was surprisingly tricky to do. I didn't use jit-lock, I used hooks.
Dunno if the solution I implemented is a good one, aesthetically, but it
worked reliably over the years, so that approach is somewhat tested.
Michael.
next prev parent reply other threads:[~2022-02-25 2:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-24 22:25 are there hooks for text becoming visible or hidden in a given window? Thomas Lord
2022-02-25 0:10 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-02-25 7:07 ` Eli Zaretskii
2022-02-25 20:51 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-02-25 2:42 ` Michael Heerdegen [this message]
2022-02-25 7:04 ` Eli Zaretskii
2022-02-26 21:42 ` Thomas Lord
2022-02-27 0:19 ` Emanuel Berg via Users list for the GNU Emacs text editor
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