Re: Please try Pmail

[Chong Yidong <cyd@stupidchicken.com>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Thanks.  First, the swapping code in pmail should be tweaked to use
>> write-region-annotate, like in Stefan's 2008-12-30 change to
>> tar-mode.el.
>
> Sounds right.

Actually, there seems to be a problem with doing this.  The
straightforward approach for using write-region-annotate is:

(defun pmail-write-region-annotate (start end)
  (when (pmail-buffers-swapped-p)
    (set-buffer pmail-view-buffer)
    (widen)
    nil))

The `widen' is necessary because pmail-view-buffer, which contains the
swapped-out buffer contents, is narrowed to the current message.
Without it, only the narrowed part of pmail-view-buffer is written out,
which is wrong.  However, we need to re-narrow pmail-view-buffer after
performing write-region, otherwise pmail screws up.  It's not clear how
to do so.

So we must either (i) put buffer-swapped-with back in and use that, or
(ii) modify annotations to somehow automatically widen and save
restrictions when the current buffer is switched.

Any suggestions?