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viper-go-away is lame


From: Raoul Gough
Subject: viper-go-away is lame
Date: Thu, 11 Jan 2007 23:07:48 +0000
User-agent: Gnus/5.1002 (Gnus v5.10.2) Emacs/21.3 (windows-nt)

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In GNU Emacs 21.3.1 (i386-msvc-nt5.0.2195)
 of 2003-03-28 on buffy
configured using `configure --with-msvc (12.00)'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENA
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

The function viper-go-away doesn't do a very good job of "exiting"
viper, because the next time you open a file, it reverts Emacs back
into viper-mode.

e. g.
M-x viper
M-x viper-go-away
C-x C-f foo.txt    ;; viper "restarts" itself here

This is caused by viper-go-away not cleaning up the changes viper made
to default-major-mode, initial-major-mode and find-file-hooks. The
following additions to viper-go-away should do the trick, maybe
there's a better way to fix the find-file-hooks via viper-remove-hooks
but I'm not sure.

  (remove-hook 'find-file-hooks 'set-viper-state-in-major-mode)

  (if (eq default-major-mode 'viper-mode)
      (setq default-major-mode 'fundamental-mode))

  (setq initial-major-mode 'lisp-interaction-mode)

By the way, viper.el in the CVS head *appears* to have the same
deficiency, but I haven't tested it.

-- 
Raoul Gough.

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