GNU bug report logs - #2549
23.0.60; doc-view: scrolling other window wraps unexpectedly

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Markus Triska <markus.triska <at> gmx.at>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; doc-view: scrolling other window wraps unexpectedly
Date: Tue,  3 Mar 2009 02:39:43 +0100 (CET)

With p.ps from:

   http://www.logic.at/prolog/p.ps

when I do:

   $ emacs -Q p.ps

and press:

   C-c C-c C-x 2

and then press C-M-v repeatedly, the other window eventually wraps
around instead of stopping at the image border like C-v does.


In GNU Emacs 23.0.60.2 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2009-01-06 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Message #10 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Tassilo Horn <tassilo <at> member.fsf.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 2549 <at> debbugs.gnu.org, emacs-pretest-bug <at> gnu.org
Subject: Re: bug#2549: 23.0.60; doc-view: scrolling other window wraps unexpectedly
Date: Tue, 03 Mar 2009 13:00:55 +0100

Markus Triska <markus.triska <at> gmx.at> writes:

Hi Markus,

> With p.ps from:
>
>    http://www.logic.at/prolog/p.ps
>
> when I do:
>
>    $ emacs -Q p.ps
>
> and press:
>
>    C-c C-c C-x 2
>
> and then press C-M-v repeatedly, the other window eventually wraps
> around instead of stopping at the image border like C-v does.

That's because `scroll-other-window' calls scroll-up/down in the other
window, but if the other window contains an doc-view buffer it should
ideally call image-scroll-up/down.

The only good solution I see is to define buffer local variables
`scroll-up-function' and `scroll-down-function' which are used by
`scroll-up' and `scroll-down' and then binding them appropriate in each
mode.

Anyway, that's not really related to doc-view.  All non-text modes are
pertained here.  Comments?

Bye,
Tassilo

Message #20 received at 2549 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Tassilo Horn <tassilo <at> member.fsf.org>
Cc: 2549 <at> debbugs.gnu.org, Markus Triska <markus.triska <at> gmx.at>
Subject: Re: bug#2549: 23.0.60; doc-view: scrolling other window wraps unexpectedly
Date: Tue, 03 Mar 2009 11:44:37 -0500

> That's because `scroll-other-window' calls scroll-up/down in the other
> window, but if the other window contains an doc-view buffer it should
> ideally call image-scroll-up/down.

> The only good solution I see is to define buffer local variables
> `scroll-up-function' and `scroll-down-function' which are used by
> `scroll-up' and `scroll-down' and then binding them appropriate in
> each mode.

Indeed, something like a hook seems necessary.  I'd rather leave it as
is for Emacs-23.1, tho.  Makes me wonder: do we have a way to tag bugs
as "post-23.1"?


        Stefan

Message #25 received at 2549 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Tassilo Horn <tassilo <at> member.fsf.org>
To: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Cc: 2549 <at> debbugs.gnu.org, Markus Triska <markus.triska <at> gmx.at>
Subject: Re: bug#2549: 23.0.60; doc-view: scrolling other window wraps unexpectedly
Date: Tue, 03 Mar 2009 20:14:23 +0100

Stefan Monnier <monnier <at> IRO.UMontreal.CA> writes:

>> That's because `scroll-other-window' calls scroll-up/down in the
>> other window, but if the other window contains an doc-view buffer it
>> should ideally call image-scroll-up/down.
>
>> The only good solution I see is to define buffer local variables
>> `scroll-up-function' and `scroll-down-function' which are used by
>> `scroll-up' and `scroll-down' and then binding them appropriate in
>> each mode.
>
> Indeed, something like a hook seems necessary.  I'd rather leave it as
> is for Emacs-23.1, tho.  Makes me wonder: do we have a way to tag bugs
> as "post-23.1"?

We could abuse the "Version:" pseudo-header for that or create a new tag
for that.  The latter seems more desirable, but I don't know how to
create a tag.  Maybe they're created automagically?  I'll try by sending

  tags 2549 + post-23.1

to the control server address...

Bye,
Tassilo

Message #32 received at 2549 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Tassilo Horn <tassilo <at> member.fsf.org>
Cc: 2549 <at> debbugs.gnu.org, Markus Triska
	<markus.triska <at> gmx.at>,
        don <at> donarmstrong.com
Subject: Re: bug#2549: 23.0.60; doc-view: scrolling other window wraps unexpectedly
Date: Tue, 03 Mar 2009 20:16:40 -0500

> We could abuse the "Version:" pseudo-header for that or create a new tag
> for that.  The latter seems more desirable, but I don't know how to
> create a tag.  Maybe they're created automagically?  I'll try by sending

>   tags 2549 + post-23.1

> to the control server address...

Actually, I think there's a way to classify bugs w.r.t releases.
So probably not tagging this as "post-23.1" but rather tagging the
others as "needs to be fixed before we can release Emacs-23.1".
But I can't figure out how to do it.


        Stefan

Message #37 received at 2549 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: Tassilo Horn <tassilo <at> member.fsf.org>
Cc: 2549 <at> debbugs.gnu.org
Subject: Re: bug#2549: 23.0.60;	doc-view: scrolling other window wraps unexpectedly
Date: Wed, 04 Mar 2009 13:44:25 +0100

> That's because `scroll-other-window' calls scroll-up/down in the other
> window, but if the other window contains an doc-view buffer it should
> ideally call image-scroll-up/down.

Just a technical note: `scroll-other-window' calls window_scroll and not
scroll-up/down.

martin

Message #40 received at 2549 <at> debbugs.gnu.org (full text, mbox):

From: Marcin Borkowski <mbork <at> mbork.pl>
To: 2549 <at> debbugs.gnu.org
Subject: Bug still present
Date: Wed, 13 Jan 2016 18:38:53 +0100

As of GNU Emacs 25.1.50.1, this bug still persists (both in doc-view and
a third-party module pdf-tools, see https://github.com/politza/pdf-tools).

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

Message #43 received at 2549 <at> debbugs.gnu.org (full text, mbox):

From: Alan Mackenzie <acm <at> muc.de>
To: Marcin Borkowski <mbork <at> mbork.pl>
Cc: 2549 <at> debbugs.gnu.org
Subject: Re: bug#2549: Bug still present
Date: 13 Jan 2016 18:29:50 -0000

In article <mailman.2298.1452706808.843.bug-gnu-emacs <at> gnu.org> you wrote:
> As of GNU Emacs 25.1.50.1, this bug still persists (both in doc-view and
> a third-party module pdf-tools, see https://github.com/politza/pdf-tools).

Just a small matter, but it might be helpful if you could give some
indication within the body of posts what the bugs referred to are about.
Even just giving the original titles would be most appreciated.

> -- 
> Marcin Borkowski
> http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
> Faculty of Mathematics and Computer Science
> Adam Mickiewicz University

-- 
Alan Mackenzie (Nuremberg, Germany).

Message #46 received at 2549 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Marcin Borkowski <mbork <at> mbork.pl>
Cc: 2549 <at> debbugs.gnu.org
Subject: Re: bug#2549: Bug still present
Date: Wed, 13 Jan 2016 21:20:36 +0200

> From: Marcin Borkowski <mbork <at> mbork.pl>
> Date: Wed, 13 Jan 2016 18:38:53 +0100
> 
> As of GNU Emacs 25.1.50.1, this bug still persists (both in doc-view and
> a third-party module pdf-tools, see https://github.com/politza/pdf-tools).

Would you like to propose a patch along the lines discussed in the
beginning of this bug analysis?

Thanks.

Message #51 received at 2549 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 2549 <at> debbugs.gnu.org, 21439 <at> debbugs.gnu.org
Subject: Re: bug#21439: 25.0.50; Make scroll-other-window work with special
 modes such as doc-view-mode
Date: Sun, 08 May 2022 14:20:30 +0200

Markus Triska <markus.triska <at> gmx.at> writes:

> With p.ps from:
>
>    http://www.logic.at/prolog/p.ps
>
> when I do:
>
>    $ emacs -Q p.ps
>
> and press:
>
>    C-c C-c C-x 2
>
> and then press C-M-v repeatedly, the other window eventually wraps
> around instead of stopping at the image border like C-v does.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

I can reproduce this in Emacs 28.1, but not in Emacs 29 --
scroll-other-window was recently changed to respect how scrolling
commands are defined in the "other window".

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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