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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: buffer-swap-text and multibyteness
Date: Sat, 31 Jan 2009 22:05:40 +0200
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: handa@m17n.org,  emacs-devel@gnu.org
> Date: Sat, 31 Jan 2009 14:43:37 -0500
> 
> In tar-mode (and the way I imagine buffer-swap-text to be used),
> swapping the buffer is a rare operation that's basically only done
> when the the major mode changes.

In Rmail, we do it each time a new message is being displayed.

Just imagine what it takes to implement rmail-edit with this
mind-swapping design (which is probably the main reason why it
currently seems to work only with plain-ASCII message bodies).