GNU bug report logs - #79145
31.0.50; doc-view-mode with auto-revert-mode emitting message when it shouldn't

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Tassilo Horn <tsdh <at> gnu.org>, Michael Albinus <michael.albinus <at> gmx.de>
Cc: jforst.mailman <at> gmail.com, 79145 <at> debbugs.gnu.org
Subject: bug#79145: 31.0.50; doc-view-mode with auto-revert-mode emitting message when it shouldn't
Date: Sat, 02 Aug 2025 11:04:14 +0300

> From: Tassilo Horn <tsdh <at> gnu.org>
> Cc: Jake <jforst.mailman <at> gmail.com>,   79145 <at> debbugs.gnu.org
> Date: Sat, 02 Aug 2025 09:30:13 +0200
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> Hi Eli,
> 
> >> When a buffer visits a file using doc-view-mode and auto-revert-mode
> >> is enabled in that buffer, Emacs emits the message "Type C-c C-c to
> >> toggle between editing or viewing the document."  every time the file
> >> is changed.  The message is not appropriate when the major mode of
> >> the current buffer is not doc-view-mode.
> >> 
> >> >From emacs -Q:
> >> 1. Visit a PDF file
> >> 2. M-x auto-revert-mode
> >> 3. Visit a different buffer like the scratch buffer
> >> 4. Cause the PDF file to be changed
> >> 5. Observe the message
> >
> > Tassilo, any comments or suggestions?
> 
> Jake's observation is certainly true but it's not really doc-view
> specific.  A similar case is shown by this recipe:
> 
> 1. open dired for /tmp and enable dired-omit-mode and auto-revert-mode
> 2. visit a different buffer
> 3. touch /tmp/foo in a terminal
> 4. observe the message "Omitting XX lines in /tmp"
> 
> So Jake's request can be broadened to something like "buffer-bound modes
> should suppress messages when their buffer is not visible".  I'm not
> sure if I'd want that.  And how to implement it.  I guess we certainly
> don't want to visit each (message...) in Emacs to check if it's
> appropriate to show in the "buffer not visible" case...

Perhaps some revert-mode specific variable that modes could bind to
suppress these messages?  Michael, any suggestions?

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