1 files changed, 67 insertions, 0 deletions
diff --git a/em-format/e-mail-extension.c b/em-format/e-mail-extension.c
new file mode 100644
index 0000000000..9516974824
--- /dev/null
+++ b/em-format/e-mail-extension.c
@@ -0,0 +1,67 @@
+/*
+ * e-mail-extension.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/>
+ *
+ */
+
+#include "e-mail-extension.h"
+
+#include <glib-object.h>
+
+G_DEFINE_INTERFACE (EMailExtension, e_mail_extension, G_TYPE_OBJECT)
+
+static void
+e_mail_extension_default_init (EMailExtensionInterface *iface)
+{
+
+}
+
+/**
+ * EMailExtension:
+ *
+ * The #EMailExtension is an abstract interface for all extensions for
+ * #EMailParser and #EmailFormatter.
+ *
+ * The interface is further extended by #EMailParserExtension and
+ * #EMailFormatterExtension interfaces which define final API for both types
+ * of extensions.
+ */
+
+/**
+ * e_mail_extension_get_mime_types:
+ * @extension: an #EMailExtension
+ *
+ * A virtual function reimplemented in all mail extensions that returns a
+ * @NULL-terminated array of mime types that the particular extension is able
+ * to process.
+ *
+ * The mime-types can be either full (like text/plain), or with common subtype,
+ * e.g. text/ *. User should try to find the best mathing mime-type handler and
+ * use the latter type only as a fallback.
+ *
+ * Return value: a @NULL-terminated array or @NULL
+ */
+const gchar **
+e_mail_extension_get_mime_types (EMailExtension *extension)
+{
+	EMailExtensionInterface *interface;
+
+	g_return_val_if_fail (E_IS_MAIL_EXTENSION (extension), NULL);
+
+	interface = E_MAIL_EXTENSION_GET_INTERFACE (extension);
+	g_return_val_if_fail (interface->mime_types != NULL, NULL);
+
+	return interface->mime_types (extension);
+}