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bug#10650: view-mode inconsistencies wrt special mode-class

From: Glenn Morris
Subject: bug#10650: view-mode inconsistencies wrt special mode-class
Date: Wed, 01 Feb 2012 02:38:05 -0500
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Stefan Monnier wrote:

>> The Lisp manual (node Basic Major Modes) says:
>>    Special mode is a basic major mode for buffers containing text
>>    that is produced specially by Emacs, rather than from a file.
> Then again, doc-view-mode is a special mode even though the PDF code is
> rarely if ever generated by Emacs.

I interpret special modes as being applicable to stuff where you won't
ever want to create an empty buffer and just start writing said stuff.
That covers PDFs, tar files, dired buffers, etc.

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.

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