GNU bug report logs - #76934
31.0.50; rectangle-mark-mode resets fringe-mode settings

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From: Stephen Berman <stephen.berman <at> gmx.net>
To: 76934 <at> debbugs.gnu.org
Cc: eliz <at> gnu.org, the_wurfkreuz <at> proton.me
Subject: bug#76934: 31.0.50; rectangle-mark-mode resets fringe-mode settings
Date: Sat, 29 Mar 2025 12:41:47 +0100

On Sat, 29 Mar 2025 14:13:09 +0300 Eli Zaretskii <eliz <at> gnu.org> wrote:

>> Cc: 76934 <at> debbugs.gnu.org
>> Date: Tue, 11 Mar 2025 19:16:44 +0200
>> From: Eli Zaretskii <eliz <at> gnu.org>
>>
>> > Date: Tue, 11 Mar 2025 14:34:09 +0000
>> > From: the_wurfkreuz <the_wurfkreuz <at> proton.me>
>> > Cc: 76934 <at> debbugs.gnu.org
>> >
>> > Initially, there is the fringe area (shown in the attached file called
>> > "first-screenshot"). I can interactively execute the fringe-mode command
>> > it choose the 'minimal' option. It makes the fringe area to visually
>> > disappear and emacs adjusts the space between the fringe of the window and
>> > line numbers accordingly (shown in the second-screenshot). Then i use the
>> > rectangle-mark-mode command and doing so returns the space that was
>> > previously taken by the fringe area back (shown in the
>> > third-screenshot). Yes, the added space doesn't use any highlighting, so
>> > you can't verify it by looking at the highlighting for the fringe-area, my
>> > description was confusing on that part.
>>
>> Looks like Emacs decided it needed one more columns for the line
>> numbers, probably because the current line moved to line 9, and maybe
>> also because the window's glyph matrix was enlarged for some reason.
>> IOW, this has nothing to do with the fringes.
>
> No further comments, so I'm now closing this bug.

The observations I made in this thread (that the extra space is
triggered by rectangle-mark-mode but remains after cancelling
rectangle-mark-mode, and that splitting the window vertically removes
the extra space) involve a buffer with only three lines, and regardless
of the number of lines I think they indicate buggy or at least
surprising behavior.  Does closing the bug mean you think the observed
behavior is fine, and if so, why is it fine?

Steve Berman

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