diff options
Diffstat (limited to 'em-format/e-mail-parser-multipart-alternative.c')
| -rw-r--r-- | em-format/e-mail-parser-multipart-alternative.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/em-format/e-mail-parser-multipart-alternative.c b/em-format/e-mail-parser-multipart-alternative.c new file mode 100644 index 0000000000..c8bbfdc31d --- /dev/null +++ b/em-format/e-mail-parser-multipart-alternative.c @@ -0,0 +1,191 @@ +/* + * 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) +{ + +} |