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/*
* e-mail-parser-multipart-alternative.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "e-mail-format-extensions.h"
#include <em-format/e-mail-parser-extension.h>
#include <em-format/e-mail-parser.h>
#include <em-format/e-mail-part-utils.h>
#include <e-util/e-util.h>
#include <camel/camel.h>
#include <string.h>
typedef EMailParserExtension EMailParserMultipartAlternative;
typedef EMailParserExtensionClass EMailParserMultipartAlternativeClass;
G_DEFINE_TYPE (
EMailParserMultipartAlternative,
e_mail_parser_multipart_alternative,
E_TYPE_MAIL_PARSER_EXTENSION)
static const gchar *parser_mime_types[] = {
"multipart/alternative",
NULL
};
static gboolean
related_display_part_is_attachment (CamelMimePart *part)
{
CamelMimePart *display_part;
display_part = e_mail_part_get_related_display_part (part, NULL);
return display_part && e_mail_part_is_attachment (display_part);
}
static gboolean
empe_mp_alternative_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelMultipart *mp;
gint i, nparts, bestid = 0;
CamelMimePart *best = NULL;
EMailExtensionRegistry *reg;
reg = e_mail_parser_get_extension_registry (parser);
mp = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);
if (!CAMEL_IS_MULTIPART (mp))
return e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable, out_mail_parts);
/* as per rfc, find the last part we know how to display */
nparts = camel_multipart_get_number (mp);
for (i = 0; i < nparts; i++) {
CamelMimePart *mpart;
CamelDataWrapper *data_wrapper;
CamelContentType *type;
CamelStream *null_stream;
gchar *mime_type;
gsize content_size;
if (g_cancellable_is_cancelled (cancellable))
return TRUE;
/* is it correct to use the passed in *part here? */
mpart = camel_multipart_get_part (mp, i);
if (mpart == NULL)
continue;
/* This may block even though the stream does not.
* XXX Pretty inefficient way to test if the MIME part
* is empty. Surely there's a quicker way? */
null_stream = camel_stream_null_new ();
data_wrapper = camel_medium_get_content (CAMEL_MEDIUM (mpart));
camel_data_wrapper_decode_to_stream_sync (
data_wrapper, null_stream, cancellable, NULL);
content_size = CAMEL_STREAM_NULL (null_stream)->written;
g_object_unref (null_stream);
if (content_size == 0)
continue;
type = camel_mime_part_get_content_type (mpart);
mime_type = camel_content_type_simple (type);
camel_strdown (mime_type);
if (!e_mail_part_is_attachment (mpart) &&
((camel_content_type_is (type, "multipart", "related") == 0) ||
!related_display_part_is_attachment (mpart)) &&
(e_mail_extension_registry_get_for_mime_type (reg, mime_type) ||
((best == NULL) &&
(e_mail_extension_registry_get_fallback (reg, mime_type)))))
{
best = mpart;
bestid = i;
}
g_free (mime_type);
}
if (best) {
gint len = part_id->len;
g_string_append_printf (part_id, ".alternative.%d", bestid);
e_mail_parser_parse_part (
parser, best, part_id,
cancellable, out_mail_parts);
g_string_truncate (part_id, len);
} else {
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
}
return TRUE;
}
static void
e_mail_parser_multipart_alternative_class_init (EMailParserExtensionClass *class)
{
class->mime_types = parser_mime_types;
class->parse = empe_mp_alternative_parse;
}
static void
e_mail_parser_multipart_alternative_init (EMailParserExtension *extension)
{
}
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