From: Eli Zaretskii <eliz@gnu.org>
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 09:04:37 +0200 [thread overview]
Message-ID: <83r17rqvei.fsf@gnu.org> (raw)
In-Reply-To: <06e7c939da37479902e9a935fbaf487a@basiscraft.com> (message from Thomas Lord on Thu, 24 Feb 2022 14:25:39 -0800)
> Date: Thu, 24 Feb 2022 14:25:39 -0800
> From: Thomas Lord <lord@basiscraft.com>
>
> Is there a way to mark a region of text in a buffer, so that when that
> text becomes visible in any window, or when it stops being visible, a
> hook is called and provided the location of the text in the buffer, and
> the window in which its visibility has changed?
Please clarify what you mean by "visible" in this context. I mean not
a couple of examples, but an exhaustive, complete definition.
> Watching scroll events would only cover part of the problem
Which part it won't cover, in your opinion?
> and I'm worried about the interactive performance of having to
> frequently search the range of visible text for text with a certain
> property or within a certain overlay.
Why do you think this could be expensive? A typical window doesn't
show too much text.
next prev parent reply other threads:[~2022-02-25 7:04 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
2022-02-25 7:04 ` Eli Zaretskii [this message]
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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