From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: relative line numbers and folding: how to make they play along?
Date: Thu, 14 Jul 2016 18:06:26 +0300 [thread overview]
Message-ID: <83bn208djh.fsf@gnu.org> (raw)
In-Reply-To: <jwvoa61osmp.fsf-monnier+gmane.emacs.help@gnu.org> (message from Stefan Monnier on Wed, 13 Jul 2016 22:36:49 -0400)
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Wed, 13 Jul 2016 22:36:49 -0400
>
> >> I think to implement relative-visual-linum-mode efficiently, we'd need
> >> help from the display engine. E.g.:
> >> - First perform redisplay of the window.
> >> - then, go through the window, visual-line by visual-line
> >> and add something in the margin.
> >> - then update the margin part of the matrices.
>
> > AFAIU, this would cause a momentary flickering of an incorrect display
> > (without the line numbers), until they are computed and displayed.
>
> Actually, I don't think there needs to be flickering if the first step
> ("perform redisplay of window") just computes the new matrices without
> performing any drawing.
Since the display engine computes the number of each screen line as it
lays them out, I don't understand why would 2 phases be needed. I'm
probably missing something.
> > And I still don't see any answer to my question, alas.
>
> It's basically: linum-mode but where the line numbers are relative to
> `point` rather than counting from `point-min`, and additionally it
> should count visual lines (so 10 invisible lines of text don't affect
> the line numbers of the text that is displayed).
So some lines will have negative numbers? And they change whenever
point moves into a different line? And when the window is scrolled,
the numbers also change?
next prev parent reply other threads:[~2016-07-14 15:06 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-11 15:11 relative line numbers and folding: how to make they play along? Filipe Silva
2016-07-12 4:51 ` Eli Zaretskii
2016-07-13 3:43 ` Filipe Silva
2016-07-13 20:10 ` Stefan Monnier
2016-07-13 20:23 ` Eli Zaretskii
2016-07-13 22:33 ` Filipe Silva
2016-07-14 15:02 ` Eli Zaretskii
[not found] ` <mailman.1359.1468449224.26859.help-gnu-emacs@gnu.org>
2016-07-14 1:29 ` Dan Espen
2016-07-14 2:36 ` Stefan Monnier
2016-07-14 15:06 ` Eli Zaretskii [this message]
2016-07-14 15:55 ` Filipe Silva
2016-07-14 15:58 ` Filipe Silva
2016-07-14 16:12 ` Eli Zaretskii
2016-07-14 16:51 ` Filipe Silva
2016-07-14 18:23 ` Boris
2016-07-14 21:03 ` Stefan Monnier
2016-07-15 0:04 ` Filipe Silva
2016-07-15 0:18 ` Stefan Monnier
2016-07-15 0:41 ` Filipe
2016-07-15 7:07 ` Eli Zaretskii
2016-07-15 13:53 ` Stefan Monnier
2016-07-15 14:22 ` Eli Zaretskii
2016-07-15 14:54 ` Stefan Monnier
2016-07-15 15:34 ` Filipe Silva
[not found] ` <mailman.1414.1468511758.26859.help-gnu-emacs@gnu.org>
2016-07-15 2:02 ` Dan Espen
[not found] ` <mailman.1374.1468463825.26859.help-gnu-emacs@gnu.org>
2016-07-14 3:20 ` Rusi
2016-07-14 12:17 ` Stefan Monnier
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