Mail formatter rewrite

All mail-parsing and formatting code has been moved to em-format.
Parsing is handeled by EMailParser class, formatting by EMailFormatter.
Both classes have registry which hold extensions - simple classes
that do actual parsing and formatting. Each supported mime-type
has it's own parser and formatter extension class.

1 files changed, 220 insertions, 0 deletions

diff --git a/em-format/e-mail-parser-multipart-encrypted.c b/em-format/e-mail-parser-multipart-encrypted.c
new file mode 100644
index 0000000000..f03588ac82
--- /dev/null
+++ b/em-format/e-mail-parser-multipart-encrypted.c
@@ -0,0 +1,220 @@
+/*
+ * e-mail-parser-multipart-encrypted.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 <glib/gi18n-lib.h>
+#include <camel/camel.h>
+
+typedef struct _EMailParserMultipartEncrypted {
+	GObject parent;
+} EMailParserMultipartEncrypted;
+
+typedef struct _EMailParserMultipartEncryptedClass {
+	GObjectClass parent_class;
+} EMailParserMultipartEncryptedClass;
+
+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 (
+	EMailParserMultipartEncrypted,
+	e_mail_parser_multipart_encrypted,
+	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/encrypted", NULL };
+
+static GSList *
+empe_mp_encrypted_parse (EMailParserExtension *extension,
+                         EMailParser *parser,
+                         CamelMimePart *part,
+                         GString *part_id,
+                         GCancellable *cancellable)
+{
+	CamelCipherContext *context;
+	const gchar *protocol;
+	CamelMimePart *opart;
+	CamelCipherValidity *valid;
+	CamelMultipartEncrypted *mpe;
+	GError *local_error = NULL;
+	GSList *parts;
+	gint len;
+	GSList *iter;
+
+	if (g_cancellable_is_cancelled (cancellable))
+		return NULL;
+
+	mpe = (CamelMultipartEncrypted *) camel_medium_get_content ((CamelMedium *) part);
+	if (!CAMEL_IS_MULTIPART_ENCRYPTED (mpe)) {
+		parts = e_mail_parser_error (
+				parser, cancellable,
+				_("Could not parse MIME message. "
+				  "Displaying as source."));
+		parts = g_slist_concat (
+				parts,
+				e_mail_parser_parse_part_as (
+					parser, part, part_id,
+				 	"application/vnd.evolution/source",
+					cancellable));
+
+		return parts;
+	}
+
+	/* Currently we only handle RFC2015-style PGP encryption. */
+	protocol = camel_content_type_param (
+		((CamelDataWrapper *)mpe)->mime_type, "protocol");
+	if (!protocol || g_ascii_strcasecmp (protocol, "application/pgp-encrypted") != 0) {
+		parts = e_mail_parser_error (
+				parser, cancellable,
+			       _("Unsupported encryption type for multipart/encrypted"));
+
+		parts = g_slist_concat (
+				parts,
+				e_mail_parser_parse_part_as (
+					parser, part, part_id,
+				   	"multipart/mixed", cancellable));
+		return parts;
+	}
+
+	context = camel_gpg_context_new (e_mail_parser_get_session (parser));
+
+	opart = camel_mime_part_new ();
+	valid = camel_cipher_context_decrypt_sync (
+			context, part, opart, cancellable, &local_error);
+
+	e_mail_part_preserve_charset_in_content_type (part, opart);
+	if (valid == NULL) {
+		parts = e_mail_parser_error (
+				parser, cancellable,
+				_("Could not parse PGP/MIME message: %s"),
+				local_error->message ?
+					local_error->message :
+					_("Unknown error"));
+
+		g_clear_error (&local_error);
+
+		parts = g_slist_concat (parts,
+				e_mail_parser_parse_part_as (
+					parser, part, part_id,
+				 	"multipart/mixed", cancellable));
+
+		g_object_unref (opart);
+		g_object_unref (context);
+
+		return parts;
+	}
+
+	len = part_id->len;
+	g_string_append (part_id, ".encrypted");
+
+	parts = e_mail_parser_parse_part (
+			parser, opart, part_id, cancellable);
+
+	g_string_truncate (part_id, len);
+
+	/* Update validity of all encrypted sub-parts */
+	for (iter = parts; iter; iter = iter->next) {
+		EMailPart *mail_part;
+
+		mail_part = iter->data;
+		if (!mail_part)
+			continue;
+
+		e_mail_part_update_validity (mail_part, valid,
+			E_MAIL_PART_VALIDITY_ENCRYPTED |
+			E_MAIL_PART_VALIDITY_PGP);
+	}
+
+	/* Add a widget with details about the encryption, but only when
+		* the decrypted part isn't itself secured, in that case it has created
+		* the button itself */
+	if (!e_mail_part_is_secured (opart)) {
+		GSList *button;
+		EMailPart *mail_part;
+		g_string_append (part_id, ".encrypted.button");
+
+		button = e_mail_parser_parse_part_as (
+				parser, part, part_id,
+				"application/vnd.evolution.widget.secure-button",
+				cancellable);
+		if (button && button->data) {
+			mail_part = button->data;
+
+			e_mail_part_update_validity (mail_part, valid,
+				E_MAIL_PART_VALIDITY_ENCRYPTED |
+				E_MAIL_PART_VALIDITY_PGP);
+		}
+
+		parts = g_slist_concat (parts, button);
+
+		g_string_truncate (part_id, len);
+	}
+
+	camel_cipher_validity_free (valid);
+
+	/* TODO: Make sure when we finalize this part, it is zero'd out */
+	g_object_unref (opart);
+	g_object_unref (context);
+
+	return parts;
+}
+
+static const gchar **
+empe_mp_encrypted_mime_types (EMailExtension *extension)
+{
+	return parser_mime_types;
+}
+
+static void
+e_mail_parser_multipart_encrypted_class_init (EMailParserMultipartEncryptedClass *klass)
+{
+	e_mail_parser_multipart_encrypted_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
+{
+	iface->parse = empe_mp_encrypted_parse;
+}
+
+static void
+e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
+{
+	iface->mime_types = empe_mp_encrypted_mime_types;
+}
+
+static void
+e_mail_parser_multipart_encrypted_init (EMailParserMultipartEncrypted *parser)
+{
+
+}