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From: Ihor Radchenko <yantar92@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: 56637@debbugs.gnu.org
Subject: bug#56637: 28.1.90; [FR] Allow a way around font-lock-mode being unconditionally disabled in " *hidden*" buffers
Date: Mon, 25 Jul 2022 17:23:11 +0800	[thread overview]
Message-ID: <87h735v94w.fsf@localhost> (raw)
In-Reply-To: <jwvk0821tgz.fsf-monnier+emacs@gnu.org>

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> When font-lock-mode is active, char-property-alias-alist contains
>> '(face font-lock-face).
>
> Yes, I know, but it would really help to see a concrete case where that
> makes a difference, because there are various ways to "fix" this
> problem.  They all have upsides and downsides.

In my case, the main difference is in org-src-font-lock-fontify-block.
Its purpose is copying the text fontification from major mode buffer to
Org mode buffer. The copying is done by checking 'face and
font-lock-extra-managed-props properties, which is sufficient as long as
font-lock-mode is activated. When font-lock-mode is not activated,
copying 'face is not enough, and we have to copy 'font-lock-face.

>> Unless we can forever rely on the implementation detail that
>> 'font-lock-face is always equivalent to the 'face property,
> It's not really "equivalent", but more importantly it's not an
> implementation detail: it's documented in the ELisp manual.

Apart from 'font-lock-face, which can be copied explicitly, I do not see
any real issues.

Maybe only htmlize, which explicitly checks the value of font-lock-mode
variable and does something strange if it is nil.

Of course, htmlize is an external package. However, potentially, places
that check font-lock-mode value and can be used noninteractively may be
problematic:

1. align-rules-list
2. faces--attribute-at-point
3. font-lock-flush (it will fail to work when font-lock-mode is nil)
4. Info-fontify-node
5. c-toggle-comment-style
6. c-fontify-new-found-type
7. c-change-expand-fl-region
8. grep-process-setup
9. sh-set-shell
10. verilog-preprocess
11. reftex-show-entry

Best,
Ihor





  reply	other threads:[~2022-07-25  9:23 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-19  4:15 bug#56637: 28.1.90; [FR] Allow a way around font-lock-mode being unconditionally disabled in " *hidden*" buffers Ihor Radchenko
2022-07-19 12:55 ` Eli Zaretskii
2022-07-20  4:13   ` Ihor Radchenko
2022-07-20 11:32     ` Eli Zaretskii
2022-07-21 12:09       ` Ihor Radchenko
2022-07-21 12:26         ` Eli Zaretskii
2022-07-21 12:44           ` Ihor Radchenko
2022-07-21 12:49             ` Eli Zaretskii
2022-07-21 13:18               ` Ihor Radchenko
2022-07-21 15:13         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-24  6:40           ` Ihor Radchenko
2022-07-19 16:13 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-19 16:36   ` Eli Zaretskii
2022-07-19 17:01     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-19 18:05       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-19 19:02       ` Eli Zaretskii
2022-07-19 19:21         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-19 19:32           ` Eli Zaretskii
2022-07-19 21:12             ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-20 11:12               ` Eli Zaretskii
2022-07-20 15:15                 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-20 16:09                   ` Eli Zaretskii
2022-07-20 19:15                     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-20  4:15   ` Ihor Radchenko
2022-07-20 14:58     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-21 12:11       ` Ihor Radchenko
2022-07-21 18:39         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-24  6:47           ` Ihor Radchenko
2022-07-24 14:25             ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-25  9:23               ` Ihor Radchenko [this message]
2022-07-25 15:56                 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-26  5:21                   ` Ihor Radchenko
2022-07-23  7:53       ` Lars Ingebrigtsen
2022-07-23  8:55         ` Eli Zaretskii
2022-07-23 13:46         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors

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