bug#74637: [PATCH] Make view-read-only behave like view-file

[Eli Zaretskii <eliz@gnu.org>]

> From: Björn Bidar <bjorn.bidar@thaodan.de>
> Cc: 74637@debbugs.gnu.org
> Date: Mon, 02 Dec 2024 20:08:46 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Date: Sun, 01 Dec 2024 22:40:16 +0200
> >> From:  Björn Bidar via "Bug reports for GNU Emacs,
> >>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >> 
> >> Make view-mode behave like when called in view-file when entered because
> >> `view-read-only' is true on a file which is not writable.
> >> The change makes the view-read-only behave better on files which are
> >> not writable. 
> >> Now it makes Emacs behave more like less on these files.
> >
> > That's an incompatible behavior change.  Is that justified?  How can
> > we be sure that everyone agrees with your interpretation of this mode?
> 
> All other view-file like modes behave like this, you view the file and
> leave the file with q.

That doesn't change the fact that view-mode didn't behave like that,
until now.

> But even going with that point: You open a file file which isn't
> writable. Once you hit q the window is quit and the buffer is buried.
> What do you do now next time you visit that file?
> The buffer was buried, view-mode isn't active anymore, you would have
> to activate view-mode again to go where you left off.
> 
> If you would want to edit the file the you visited this way you would
> have not pressed q but e to exit view mode and the proceeded to exit
> read-only-mode and edit the file.

What about entering view-mode by typing "C-x C-q" in a buffer whose
file is writable?  Why should we kill the buffer when the user turns
off view-mode in that file's buffer?