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From: Juri Linkov <juri@jurta.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Chong Yidong <cyd@gnu.org>, 10650@debbugs.gnu.org
Subject: bug#10650: view-mode inconsistencies wrt special mode-class
Date: Thu, 02 Feb 2012 02:40:45 +0200	[thread overview]
Message-ID: <87ehuegj8y.fsf@mail.jurta.org> (raw)
In-Reply-To: <jwvd39yljkd.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Wed, 01 Feb 2012 09:31:44 -0500")

>> Personally I think a separate variable controlling which modes are
>> incompatible with view-mode would be better, but I'm not going to
>> complain if the definition of special modes is extended to cover this.
>
> I'm not sure exactly what's the idea with view-mode's use of special
> mode class, but IIUC it's that we don't want to enable view-mode in
> major modes that already have view-mode-like keybindings, which might
> boil down to something along the lines of "major modes which use
> suppress-keymap".

Without using the special mode class or adding a new separate variable,
the closest condition to match modes incompatible with view-mode would be:

  (and (buffer-file-name)
       (or (derived-mode-p 'special-mode)
           (equal (keymap-parent (current-local-map)) special-mode-map)))

What is worth to note is that these modes don't suppress the special-mode keymap,
but inherit from it and override most of its key bindings.

But this heuristics is too unreliable, so explicitly declaring
incompatible modes is better.





  parent reply	other threads:[~2012-02-02  0:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-30  9:05 bug#10650: view-mode inconsistencies wrt special mode-class Glenn Morris
2012-01-30 20:10 ` Glenn Morris
2012-01-30 23:29   ` Juri Linkov
2012-01-31  0:38     ` Glenn Morris
2012-01-31  1:49 ` Stefan Monnier
2012-01-31  2:50   ` Glenn Morris
2012-01-31  6:17     ` Chong Yidong
2012-01-31 17:37       ` Stefan Monnier
2012-02-01  7:38         ` Glenn Morris
2012-02-01  8:32           ` Chong Yidong
2012-02-01 17:15             ` Glenn Morris
2012-02-01 14:31           ` Stefan Monnier
2012-02-01 17:12             ` Glenn Morris
2012-02-02  0:40             ` Juri Linkov [this message]
2012-02-02 18:49               ` Stefan Monnier
2012-02-02 20:03                 ` Glenn Morris
2012-02-02 21:11                   ` Juri Linkov

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