On Tue, 13 Apr 2010 23:19:37 +0100, James Westby <jw+debian@jameswestby.net> wrote:
> On Wed, 14 Apr 2010 00:11:50 +0200, Xavier Maillard <xma@gnu.org> wrote:
> > Say I have a thread with A-B-C. I visit the thread and read the
> > whole thread. Let's say after 'notmuch new' a post has entered
> > the thread: A-B-C-D. Is there an easy way to just have one of
> > these behaviour:
> > 
> > - only show the new message (with an option to toggle display of
> >   the old messages)
> > - display the whole thread with the 3 read messages 'collapsed'
> >   and only the unread message 'expanded'
> 
> This is the default behaviour in my experience.

I agree this is the behavior I see, but there is a caveat that may be
the cause of confusion:

> Reading a message unsets the 'unread' tag.
> 
> The default search if for 'inbox' + 'unread'.

Actually, the default search is for just "tag:inbox", which will also
display any messages in the inbox that have "tag:unread" as well.  But
remember that if you are coming from a search for "tag:inbox", when you
view a thread all the message with "tag:inbox" will be visible
(uncollapsed), whether or not they have "tag:unread" not.  Just reading
a message will not cause it to collapse when coming from a "tag:inbox"
search.  I think this might be where the confusion is coming from.  If
you want to view just the messages in your inbox that are unread, then
you need to search for "tag:inbox and tag:unread", or type 'f' in
notmuch mode to filter your inbox search with the "tag:unread" search.
Make sense?

jamie.