On Wed, 18 Jan 2012 22:04:36 +0400, Dmitry Kurochkin <dmitry.kurochkin@gmail.com> wrote:
> On Wed, 18 Jan 2012 17:39:31 +0000, David Edmondson <dme@dme.org> wrote:
> > The `mm-inlinable-p' and `mm-inlined-p' functions work better if they
> > have access to the data of the relevant part, so load that content
> > before calling either function.
> > 
> > This fixes the display of attached image/jpeg parts, for example.
> 
> Not so long ago I made an opposite change to avoid fetching useless
> parts (e.g. audio files).  Looks like we need a better check here.  Can
> we know from Content-Type if fetching a part body would be useful?

What if `notmuch-show-insert-part-*/*' consulted a list of content-type
regexps to attempt to inline?

That would allow a sane default (("image/*" "text/*") perhaps), but also
allow more to be added to that list (or some to be removed), either by
code that detected the (in)ability to render it or the user.