GNU bug report logs - #75993
Special mode-class for diff-mode

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From: Juri Linkov <juri <at> linkov.net>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 75993 <at> debbugs.gnu.org
Subject: bug#75993: Special mode-class for diff-mode
Date: Thu, 06 Feb 2025 09:58:59 +0200

>> I tested with special mode-class, and see no negative side effect.
>
> Have you tried to
>
>     (setq diff-default-read-only nil)
>     (setq view-read-only t)
>
> and then open a read-only `.patch` file?
> I think your patch will hinder
> the auto-activation of `view-mode` in that case.

Indeed, `view-mode` is not activated in this case,
and this is the right thing to do to allow using
diff-mode single letters like 'w' (diff-kill-ring-save)
instead of overriding it with
'View-scroll-page-backward-set-page-size'.

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