From: Gregory Heytings <gregory@heytings.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 56682@debbugs.gnu.org, monnier@iro.umontreal.ca, akrl@sdf.org
Subject: bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked locked narrowing.
Date: Tue, 14 Feb 2023 14:59:22 +0000 [thread overview]
Message-ID: <0f053182b04357300cb1@heytings.org> (raw)
In-Reply-To: <83pmaccnz7.fsf@gnu.org>
>> 1. There are three places (indent.c:line_number_display_width,
>> xdisp.c:display_count_lines_logically, fileio.c:write_region) where we
>> currently use
>>
>> record_unwind_protect (save_restriction_restore, save_restriction_save ());
>> Fwiden ();
>
> I'm not sure these should be subject to locked narrowing. They don't
> present performance problems with very long lines, AFAIK.
>
>> 2. In another place (process.c:Finternal_default_process_filter) we
>> currently have:
>>
>> /* If the output marker is outside of the visible region, save
>> the restriction and widen. */
>> if (! (BEGV <= PT && PT <= ZV))
>> Fwiden ();
>>
>> (without the "save the restriction" mentioned in the comment).
>
> This should be fixed to use unwind-protect of some kind, I think, and
> that's orthogonal to locked narrowing.
>
>> 3. Also, in Ferase_buffer, we do Fwiden to "delete the entire contents
>> of the current buffer".
>>
>> These five places probably need to be adapted to handle labeled
>> narrowings correctly. If you agree with that, I'll write a patch to
>> that effect.
>
> I'm not sure what you mean by "adapt to". Please tell more.
>
Fwiden in the functions above (which are AFAICS the only places in Emacs
where Fwiden is called) is not prepared to the possibility of them being
called inside a labeled narrowing, either one installed by the long lines
code, or another one. Basically we need to use a variant of
reset_outermost_narrowings (for the current buffer only) where we use
record_unwind_protect (save_restriction_restore, save_restriction_save ());
next prev parent reply other threads:[~2023-02-14 14:59 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <166939872890.18950.12581667269687468681@vcs2.savannah.gnu.org>
[not found] ` <20221125175209.51166C004B6@vcs2.savannah.gnu.org>
[not found] ` <jwvk028zxbs.fsf-monnier+emacs@gnu.org>
2022-12-30 16:38 ` bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked locked narrowing Gregory Heytings
2022-12-30 16:41 ` Gregory Heytings
2022-12-30 17:01 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-12-30 17:25 ` Gregory Heytings
2022-12-30 18:51 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-12 9:34 ` Eli Zaretskii
2023-01-14 21:38 ` Gregory Heytings
2023-01-26 7:29 ` Eli Zaretskii
2023-01-28 15:11 ` Gregory Heytings
2023-01-28 15:36 ` Eli Zaretskii
2023-01-30 9:00 ` Gregory Heytings
2023-01-30 13:07 ` Eli Zaretskii
2023-01-30 15:03 ` Gregory Heytings
2023-01-30 17:11 ` Eli Zaretskii
2023-01-30 17:24 ` Juri Linkov
2023-01-30 17:52 ` Eli Zaretskii
2023-01-30 17:56 ` Juri Linkov
2023-01-30 18:05 ` Eli Zaretskii
2023-01-30 18:56 ` Dmitry Gutov
2023-01-30 19:02 ` Eli Zaretskii
2023-01-30 21:07 ` Dmitry Gutov
2023-01-30 21:49 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-30 23:29 ` Dmitry Gutov
2023-01-31 12:14 ` Eli Zaretskii
2023-01-31 15:58 ` Dmitry Gutov
2023-01-31 15:17 ` Gregory Heytings
2023-01-31 16:03 ` Dmitry Gutov
2023-01-31 15:14 ` Gregory Heytings
2023-01-31 16:25 ` Dmitry Gutov
2023-01-31 21:46 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-31 22:25 ` Dmitry Gutov
2023-02-01 18:55 ` Eli Zaretskii
2023-02-01 20:46 ` dick
2023-02-01 22:42 ` Gregory Heytings
2023-02-02 6:43 ` Eli Zaretskii
2023-02-03 0:20 ` Gregory Heytings
2023-02-03 7:39 ` Eli Zaretskii
2023-02-03 22:12 ` Gregory Heytings
2023-02-04 6:32 ` Eli Zaretskii
2023-02-09 1:57 ` Gregory Heytings
2023-02-09 7:01 ` Eli Zaretskii
2023-02-09 10:33 ` Gregory Heytings
2023-02-09 14:26 ` Eli Zaretskii
2023-02-09 14:39 ` Gregory Heytings
2023-02-09 15:46 ` Eli Zaretskii
2023-02-09 16:11 ` Gregory Heytings
2023-02-09 17:02 ` Eli Zaretskii
2023-02-09 17:44 ` Juri Linkov
2023-02-09 20:47 ` Gregory Heytings
2023-02-09 22:46 ` Drew Adams
2023-02-09 23:06 ` Drew Adams
2023-02-13 18:11 ` Eli Zaretskii
2023-02-10 7:44 ` Eli Zaretskii
2023-02-10 23:05 ` Gregory Heytings
2023-02-09 17:31 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-09 17:43 ` Eli Zaretskii
2023-02-09 17:57 ` Juri Linkov
2023-02-10 16:46 ` Andrea Corallo
2023-02-11 7:18 ` Eli Zaretskii
2023-02-13 11:00 ` Gregory Heytings
2023-02-13 18:10 ` Eli Zaretskii
2023-02-14 10:30 ` Gregory Heytings
2023-02-14 14:37 ` Eli Zaretskii
2023-02-14 14:59 ` Gregory Heytings [this message]
2023-02-14 16:55 ` Eli Zaretskii
2023-02-14 22:50 ` Gregory Heytings
2023-02-15 12:36 ` Eli Zaretskii
2023-02-15 13:37 ` Gregory Heytings
2023-02-15 14:10 ` Eli Zaretskii
2023-02-15 14:37 ` Gregory Heytings
2023-02-18 23:12 ` Gregory Heytings
2023-02-19 6:29 ` Eli Zaretskii
[not found] ` <a9b3c867-aa6a-2979-a83-dd700e985c9@heytings.org>
2023-03-29 14:52 ` Gregory Heytings
2023-04-01 0:27 ` Gregory Heytings
2023-04-01 5:42 ` Eli Zaretskii
2023-04-01 9:04 ` Gregory Heytings
2023-04-01 11:11 ` Eli Zaretskii
2023-04-01 14:26 ` Gregory Heytings
2023-04-01 15:09 ` Eli Zaretskii
2023-04-01 15:41 ` Gregory Heytings
2023-04-01 16:21 ` Eli Zaretskii
2023-04-01 17:01 ` Gregory Heytings
2023-04-01 17:12 ` Eli Zaretskii
2023-04-01 21:56 ` Gregory Heytings
2023-04-02 5:16 ` Eli Zaretskii
2023-04-04 2:55 ` Richard Stallman
2023-04-04 10:50 ` Eli Zaretskii
[not found] ` <ccfcc63b8da74932424b@heytings.org>
2023-05-04 5:31 ` Eli Zaretskii
2023-05-04 15:45 ` Gregory Heytings
2023-05-05 15:26 ` Eli Zaretskii
2023-05-05 21:29 ` Gregory Heytings
2023-05-06 6:26 ` Eli Zaretskii
2023-05-09 21:48 ` Gregory Heytings
2023-05-10 14:00 ` Eli Zaretskii
2023-05-12 11:12 ` Eli Zaretskii
2023-05-12 12:50 ` Gregory Heytings
2023-05-12 22:18 ` Gregory Heytings
2023-05-13 6:41 ` Eli Zaretskii
2023-01-30 14:46 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-30 15:05 ` Gregory Heytings
2023-01-30 15:08 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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