[patch] improve handling of embedded messages

[Albrecht Dreß <albrecht dress arcor de>]

Hi,

attached is a first working patch (against 2.0.5 cvs, details below) to 
improve the handling of embedded messages (You will get embedded messages 
(message/rfc822 parts) when using e.g. forward->attached).

This patch will

* add vertical bars (aka vseparator) to the left of embedded message parts 
according to their "nesting depth" (embedded messages may again contain 
message/rfc822 parts);

* display the header lines of embedded messages, honoring the 
configuration for the global headers and all changes (e.g. the "all 
headers" button).

Still TODO:

* visualise the structure in the icon list (how???)

* do the same for printing...

Any comments are -as always- welcome!

Cheers, Albrecht.


Patch details:

* file libmutt/parse.c:
let libmutt extract all header lines including the "user headers" from 
embedded messages

* files libbalsa/body.h, libbalsa/libbalsa.h:
define a new struct to hold the embedded headers

* file libbalsa/body.c:
new function libbalsa_message_body_extract_embedded_headers to extract 
headers of an embedded message into a struct plus all the infrastructure 
to create and free it

* file src/balsa-message.c:
for embedded parts, put the widget into a hbox with vseparator(s) to the 
left, new function display_embedded_headers() to display the embedded 
headers (we can *not* use display_headers()!), extension of 
part_info_init_message() and balsa_message_set_displayed_headers()

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Albrecht Dreß  -  Johanna-Kirchner-Straße 13  -  D-53123 Bonn (Germany)
        Phone (+49) 228 6199571  -  mailto:albrecht.dress@arcor.de
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Embedded-Msg.patch.gz