Re: [Evolution-hackers] redesign of camel's mime-part content objects

[Jeffrey Stedfast <fejj ximian com>]

On Thu, 2003-07-10 at 16:28, Jeffrey Stedfast wrote:
> - CamelDataWrapper gets changed so that it has a CamelEncodingType
>   enum rather than int rawtext member (since rawtext will now always be
>   TRUE).
> 
> - CamelDataWrapper::write_to_stream() will qp/base64 decode for us,
>   but will not do any charset conversion. Perhaps have a flag as to
>   whether to decode? this way if we are re-writing out the raw message
>   someplace, no need to have write_to_stream() decode, cuz then we'd
>   have to re-encode which would break the whole point of this change.
> 
>   Hmmm, could we maybe have camel-mime-part.c grab the dw's stream and
>   write that out raw instead? Will this work in the offline case?
>   Problem is that if we make the write_to_stream() interface take a
>   flag as to whether or not to decode, we have to pass extra garbage
>   (which wouldn't even make sense) when writing out CamelMimeMessages
>   or CamelMimePart objects.
> 
> - camel-mime-part-utils.c will no longer qp/base64 decode the content,
>   rather it will just read it raw into a memory stream and then set
>   that on a CamelDataWrapper and also set which decoder to use.

hacked up most of the above, but it turns out I missed some things that
are gonna be affected by this change.

1. charset conversions in camel-mime-part.c:write_to_stream() - we can
no longer depend on text parts to be in UTF-8 and stuff. This may not be
so bad, however, since if the CamelContentType struct on the content
data-wrapper should contain a charset param... we can then use that
charset as the 'from_charset' argument and use the charset we want for
output as the 'to_charset' like we currently do.

2. the composer will have to set the content's charset to UTF-8 if we
aren't gonna do the actual charset conversion there (we currently
don't).

3. camel-mime-message.c:camel_mime_message_set_best_encoding() will need
to be fixed wrt charsets since it can no longer rely on the content
being in UTF-8

Jeff

-- 
Jeffrey Stedfast
Evolution Hacker - Ximian, Inc.
fejj ximian com  - www.ximian.com