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Re: Forward: [GitHub] Elmo treats IMAP4 messages flagged as both unseen and answered as seen [wanderlust/wanderlust GH-30]

At Fri, 25 Mar 2011 10:52:16 -0400, Dave Abrahams wrote:

> From: sgrb <reply+i-703493-079d034f3628f17179246b9a8857caaa4b3e6e9e@reply.github.com>
> To: dave+gitmirror@boostpro.com
> Date: Fri, 25 Mar 2011 02:20:14 -0700
> Subject: [GitHub] Elmo treats IMAP4 messages flagged as both unseen and answered as seen [wanderlust/wanderlust GH-30]
> 
> I've found that when IMAP4 message is marked as both unseen and
> answered, elmo forces it to be marked as seen. The following code
> snipped is responsible for it (elmo-imap4.el:942,
> elmo-imap4-fetch-callback-1-subr):
> 
>     (when (and (or (memq 'important flag-list)
>                              (memq 'answered flag-list))
>                (memq 'unread flag-list))
>         (setq elmo-imap4-seen-messages
>                  (cons (elmo-message-entity-number entity) 
>                            elmo-imap4-seen-messages)))
> 
> I suppose that this behavior is wrong. Here is an example of situation
> when this behavior complicates usage of wanderlust: I'm reading lots of
> corporate mail lists accessed as IMAP4 shared folders.  When someone
> posts reply to some message in such shared folder, it becomes flagged as
> answered and unseen until I read it (after which it becomes marked as
> answered only). elmo automatically clears 'unread' flag in this case,
> which makes wl-summary-down to skip this message - despite the fact that
> I haven't read it. So I need to look for such messages manually, which
> is very inconvinient...
> 
> I don't know whether the behavior of IMAP4 shared folders described
> above is common or not, but I still suggest removing of the fragment of
> code cited above. Answered doesn't imply seen - because it could be
> unseen by you, but answered by someone else - which is quite common in
> case of shared folders.

Looks reasonable. I'm ok to commit change, but would like to hear
people opinion on it.

Guys?
-- 
wbr, Vitaly