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-rw-r--r--em-format/e-mail-parser-multipart-alternative.c191
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diff --git a/em-format/e-mail-parser-multipart-alternative.c b/em-format/e-mail-parser-multipart-alternative.c
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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 struct _EMailParserMultipartAlternative {
+ GObject parent;
+} EMailParserMultipartAlternative;
+
+typedef struct _EMailParserMultipartAlternativeClass {
+ GObjectClass parent_class;
+} EMailParserMultipartAlternativeClass;
+
+static void e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface);
+static void e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface);
+
+G_DEFINE_TYPE_EXTENDED (
+ EMailParserMultipartAlternative,
+ e_mail_parser_multipart_alternative,
+ G_TYPE_OBJECT,
+ 0,
+ G_IMPLEMENT_INTERFACE (
+ E_TYPE_MAIL_EXTENSION,
+ e_mail_parser_mail_extension_interface_init)
+ G_IMPLEMENT_INTERFACE (
+ E_TYPE_MAIL_PARSER_EXTENSION,
+ e_mail_parser_parser_extension_interface_init));
+
+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 GSList *
+empe_mp_alternative_parse (EMailParserExtension *extension,
+ EMailParser *parser,
+ CamelMimePart *part,
+ GString *part_id,
+ GCancellable *cancellable)
+{
+ CamelMultipart *mp;
+ gint i, nparts, bestid = 0;
+ CamelMimePart *best = NULL;
+ GSList *parts;
+ EMailExtensionRegistry *reg;
+
+ if (g_cancellable_is_cancelled (cancellable))
+ return NULL;
+
+ 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);
+ }
+
+ /* 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 NULL;
+
+ /* 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);
+
+ parts = e_mail_parser_parse_part (
+ parser, best, part_id, cancellable);
+
+ g_string_truncate (part_id, len);
+ } else {
+ parts = e_mail_parser_parse_part_as (
+ parser, part, part_id, "multipart/mixed", cancellable);
+ }
+
+ return parts;
+}
+
+static const gchar **
+empe_mp_alternative_mime_types (EMailExtension *extension)
+{
+ return parser_mime_types;
+}
+
+static void
+e_mail_parser_multipart_alternative_class_init (EMailParserMultipartAlternativeClass *klass)
+{
+ e_mail_parser_multipart_alternative_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
+{
+ iface->parse = empe_mp_alternative_parse;
+}
+
+static void
+e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
+{
+ iface->mime_types = empe_mp_alternative_mime_types;
+}
+
+static void
+e_mail_parser_multipart_alternative_init (EMailParserMultipartAlternative *parser)
+{
+
+}