Teach EMailExtensionRegistry to find extensions.

Now we have the following extension points in the GType hierarchy:

   E_TYPE_MAIL_FORMATTER_EXTENSION
   E_TYPE_MAIL_FORMATTER_PRINT_EXTENSION
   E_TYPE_MAIL_FORMATTER_QUOTE_EXTENSION
   E_TYPE_MAIL_PARSER_EXTENSION

A registry just needs to be given one of these extension points, and it
can use g_type_children() to find and load all registered extensions.

This eliminates e-mail-format-extensions.[ch] as well as the dynamic
loaders I added a few commits back.  Dynamically loaded extensions are
now easier to register, at the cost of internal extensions being a tad
more cumbersome to register.  Fair tradeoff, imo.

This also makes e_mail_extension_registry_add_extension() a private
function used only by e_mail_formatter_extension_registry_load() and
e_mail_parser_extension_registry_load().

50 files changed, 201 insertions, 373 deletions

diff --git a/em-format/Makefile.am b/em-format/Makefile.am
index 6e45b0f6f1..164f3004b5 100644
--- a/em-format/Makefile.am
+++ b/em-format/Makefile.am
@@ -40,8 +40,6 @@ libemformat_la_SOURCES =				\
 	$(emformatinclude_HEADERS)			\
 	e-mail-extension-registry.c			\
 	e-mail-inline-filter.c				\
-	e-mail-format-extensions.c			\
-	e-mail-format-extensions.h			\
 	e-mail-formatter.c				\
 	e-mail-formatter-print.c			\
 	e-mail-formatter-quote.c			\
diff --git a/em-format/e-mail-extension-registry.c b/em-format/e-mail-extension-registry.c
index d786f939a0..e6a78e4e88 100644
--- a/em-format/e-mail-extension-registry.c
+++ b/em-format/e-mail-extension-registry.c
@@ -19,7 +19,8 @@
 #include <glib-object.h>
 
 #include "e-mail-extension-registry.h"
-#include "e-mail-format-extensions.h"
+#include "e-mail-formatter-extension.h"
+#include "e-mail-parser-extension.h"
 #include <libebackend/libebackend.h>
 #include <camel/camel.h>
 
@@ -59,6 +60,49 @@ destroy_queue (GQueue *queue)
 }
 
 static void
+mail_extension_registry_add_extension (EMailExtensionRegistry *registry,
+                                       const gchar **mime_types,
+                                       GType extension_type)
+{
+	GObject *extension;
+	gint ii;
+
+	if (mime_types == NULL) {
+		g_critical (
+			"%s does not define any MIME types",
+			g_type_name (extension_type));
+		return;
+	}
+
+	extension = g_object_new (extension_type, NULL);
+
+	for (ii = 0; mime_types[ii] != NULL; ii++) {
+		GQueue *queue;
+
+		queue = g_hash_table_lookup (
+			registry->priv->table, mime_types[ii]);
+		if (queue == NULL) {
+			queue = g_queue_new ();
+			g_hash_table_insert (
+				registry->priv->table,
+				(gpointer) mime_types[ii],
+				queue);
+		}
+
+		g_queue_push_head (queue, g_object_ref (extension));
+
+		if (camel_debug ("emformat:registry")) {
+			printf (
+				"Added extension '%s' for type '%s'\n",
+				g_type_name (extension_type),
+				mime_types[ii]);
+		}
+	}
+
+	g_object_unref (extension);
+}
+
+static void
 mail_extension_registry_finalize (GObject *object)
 {
 	EMailExtensionRegistryPrivate *priv;
@@ -97,55 +141,6 @@ e_mail_extension_registry_init (EMailExtensionRegistry *registry)
 }
 
 /**
- * e_mail_extension_registry_add_extension:
- * @registry: an #EMailExtensionRegistry
- * @mime_types: a %NULL-terminated array of MIME types
- * @extension_type: the #GType of the extension being added
- *
- * Creates an instance of @extension_type and registers the instance for
- * all provided MIME types.
- */
-void
-e_mail_extension_registry_add_extension (EMailExtensionRegistry *registry,
-                                         const gchar **mime_types,
-                                         GType extension_type)
-{
-	GObject *extension;
-	gint ii;
-
-	g_return_if_fail (E_IS_MAIL_EXTENSION_REGISTRY (registry));
-	g_return_if_fail (mime_types != NULL);
-	g_return_if_fail (extension_type != G_TYPE_INVALID);
-
-	extension = g_object_new (extension_type, NULL);
-
-	for (ii = 0; mime_types[ii] != NULL; ii++) {
-		GQueue *queue;
-
-		queue = g_hash_table_lookup (
-			registry->priv->table, mime_types[ii]);
-		if (queue == NULL) {
-			queue = g_queue_new ();
-			g_hash_table_insert (
-				registry->priv->table,
-				(gpointer) mime_types[ii],
-				queue);
-		}
-
-		g_queue_push_head (queue, g_object_ref (extension));
-
-		if (camel_debug ("emformat:registry")) {
-			printf (
-				"Added extension '%s' for type '%s'\n",
-				g_type_name (extension_type),
-				mime_types[ii]);
-		}
-	}
-
-	g_object_unref (extension);
-}
-
-/**
  * e_mail_extension_registry_get_for_mime_type:
  * @regstry: An #EMailExtensionRegistry
  * @mime_type: A string with mime-type to look up
@@ -225,6 +220,36 @@ e_mail_parser_extension_registry_init (EMailParserExtensionRegistry *registry)
 {
 }
 
+void
+e_mail_parser_extension_registry_load (EMailParserExtensionRegistry *registry)
+{
+	GType *children;
+	GType base_extension_type;
+	guint ii, n_children;
+
+	g_return_if_fail (E_IS_MAIL_PARSER_EXTENSION_REGISTRY (registry));
+
+	base_extension_type = E_TYPE_MAIL_PARSER_EXTENSION;
+	children = g_type_children (base_extension_type, &n_children);
+
+	for (ii = 0; ii < n_children; ii++) {
+		EMailParserExtensionClass *class;
+
+		if (G_TYPE_IS_ABSTRACT (children[ii]))
+			continue;
+
+		class = g_type_class_ref (children[ii]);
+
+		mail_extension_registry_add_extension (
+			E_MAIL_EXTENSION_REGISTRY (registry),
+			class->mime_types, children[ii]);
+
+		g_type_class_unref (class);
+	}
+
+	g_free (children);
+}
+
 /******************************************************************************/
 
 G_DEFINE_TYPE_WITH_CODE (
@@ -243,3 +268,32 @@ e_mail_formatter_extension_registry_init (EMailFormatterExtensionRegistry *regis
 {
 }
 
+void
+e_mail_formatter_extension_registry_load (EMailFormatterExtensionRegistry *registry,
+                                          GType base_extension_type)
+{
+	GType *children;
+	guint ii, n_children;
+
+	g_return_if_fail (E_IS_MAIL_FORMATTER_EXTENSION_REGISTRY (registry));
+
+	children = g_type_children (base_extension_type, &n_children);
+
+	for (ii = 0; ii < n_children; ii++) {
+		EMailFormatterExtensionClass *class;
+
+		if (G_TYPE_IS_ABSTRACT (children[ii]))
+			continue;
+
+		class = g_type_class_ref (children[ii]);
+
+		mail_extension_registry_add_extension (
+			E_MAIL_EXTENSION_REGISTRY (registry),
+			class->mime_types, children[ii]);
+
+		g_type_class_unref (class);
+	}
+
+	g_free (children);
+}
+
diff --git a/em-format/e-mail-extension-registry.h b/em-format/e-mail-extension-registry.h
index 21011ef286..7002eb0385 100644
--- a/em-format/e-mail-extension-registry.h
+++ b/em-format/e-mail-extension-registry.h
@@ -57,10 +57,6 @@ struct _EMailExtensionRegistryClass {
 
 GType		e_mail_extension_registry_get_type
 					(void) G_GNUC_CONST;
-void		e_mail_extension_registry_add_extension
-					(EMailExtensionRegistry *registry,
-					 const gchar **mime_types,
-					 GType extension_type);
 GQueue *	e_mail_extension_registry_get_for_mime_type
 					(EMailExtensionRegistry *registry,
 					 const gchar *mime_type);
@@ -108,6 +104,8 @@ struct _EMailParserExtensionRegistryClass {
 
 GType		e_mail_parser_extension_registry_get_type
 					(void) G_GNUC_CONST;
+void		e_mail_parser_extension_registry_load
+					(EMailParserExtensionRegistry *registry);
 
 G_END_DECLS
 
@@ -149,6 +147,9 @@ struct _EMailFormatterExtensionRegistryClass {
 
 GType		e_mail_formatter_extension_registry_get_type
 					(void) G_GNUC_CONST;
+void		e_mail_formatter_extension_registry_load
+					(EMailFormatterExtensionRegistry *registry,
+					 GType base_extension_type);
 
 G_END_DECLS
 
diff --git a/em-format/e-mail-format-extensions.c b/em-format/e-mail-format-extensions.c
deleted file mode 100644
index 8ba36702a8..0000000000
--- a/em-format/e-mail-format-extensions.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/*
- * e-mail-format-extensions.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-format-extensions.h"
-
-#include "em-format/e-mail-parser-extension.h"
-#include "em-format/e-mail-formatter-extension.h"
-
-typedef GType (*TypeFunc) (void);
-
-TypeFunc parser_funcs[] = {
-	e_mail_parser_application_mbox_get_type,
-	e_mail_parser_attachment_bar_get_type,
-	e_mail_parser_headers_get_type,
-	e_mail_parser_message_get_type,
-	e_mail_parser_secure_button_get_type,
-	e_mail_parser_source_get_type,
-	e_mail_parser_image_get_type,
-	e_mail_parser_inline_pgp_encrypted_get_type,
-	e_mail_parser_inline_pgp_signed_get_type,
-	e_mail_parser_message_delivery_status_get_type,
-	e_mail_parser_message_external_get_type,
-	e_mail_parser_message_rfc822_get_type,
-	e_mail_parser_multipart_alternative_get_type,
-	e_mail_parser_multipart_apple_double_get_type,
-	e_mail_parser_multipart_digest_get_type,
-	e_mail_parser_multipart_encrypted_get_type,
-	e_mail_parser_multipart_mixed_get_type,
-	e_mail_parser_multipart_related_get_type,
-	e_mail_parser_multipart_signed_get_type,
-	e_mail_parser_text_enriched_get_type,
-	e_mail_parser_text_html_get_type,
-	e_mail_parser_text_plain_get_type,
-#ifdef ENABLE_SMIME
-	e_mail_parser_application_smime_get_type,
-#endif
-	NULL
-};
-
-TypeFunc formatter_funcs[] = {
-	e_mail_formatter_attachment_get_type,
-	e_mail_formatter_attachment_bar_get_type,
-	e_mail_formatter_error_get_type,
-	e_mail_formatter_headers_get_type,
-	e_mail_formatter_secure_button_get_type,
-	e_mail_formatter_source_get_type,
-	e_mail_formatter_image_get_type,
-	e_mail_formatter_message_rfc822_get_type,
-	e_mail_formatter_text_enriched_get_type,
-	e_mail_formatter_text_html_get_type,
-	e_mail_formatter_text_plain_get_type,
-	NULL
-};
-
-TypeFunc quote_formatter_funcs[] = {
-	e_mail_formatter_quote_attachment_get_type,
-	e_mail_formatter_quote_headers_get_type,
-	e_mail_formatter_quote_message_rfc822_get_type,
-	e_mail_formatter_quote_text_enriched_get_type,
-	e_mail_formatter_quote_text_html_get_type,
-	e_mail_formatter_quote_text_plain_get_type,
-	NULL
-};
-
-TypeFunc print_formatter_funcs[] = {
-	e_mail_formatter_print_headers_get_type,
-	NULL
-};
-
-static void
-load (EMailExtensionRegistry *ereg,
-      TypeFunc *func_array)
-{
-	gint ii;
-
-	for (ii = 0; func_array[ii] != NULL; ii++) {
-		GType extension_type;
-		GType interface_type;
-		gpointer extension_class;
-		const gchar **mime_types = NULL;
-
-		extension_type = func_array[ii]();
-		extension_class = g_type_class_ref (extension_type);
-
-		interface_type = E_TYPE_MAIL_FORMATTER_EXTENSION;
-		if (g_type_is_a (extension_type, interface_type))
-			mime_types = ((EMailFormatterExtensionClass *)
-				extension_class)->mime_types;
-
-		interface_type = E_TYPE_MAIL_PARSER_EXTENSION;
-		if (g_type_is_a (extension_type, interface_type))
-			mime_types = ((EMailParserExtensionClass *)
-				extension_class)->mime_types;
-
-		if (mime_types != NULL)
-			e_mail_extension_registry_add_extension (
-				ereg, mime_types, extension_type);
-		else
-			g_critical (
-				"%s does not define any MIME types",
-				g_type_name (extension_type));
-
-		g_type_class_unref (extension_class);
-	}
-}
-
-void
-e_mail_parser_internal_extensions_load (EMailExtensionRegistry *ereg)
-{
-	load (ereg, parser_funcs);
-}
-
-void
-e_mail_formatter_internal_extensions_load (EMailExtensionRegistry *ereg)
-{
-	load (ereg, formatter_funcs);
-}
-
-void
-e_mail_formatter_quote_internal_extensions_load (EMailExtensionRegistry *ereg)
-{
-	load (ereg, quote_formatter_funcs);
-}
-
-void
-e_mail_formatter_print_internal_extensions_load (EMailExtensionRegistry *ereg)
-{
-	load (ereg, print_formatter_funcs);
-}
diff --git a/em-format/e-mail-format-extensions.h b/em-format/e-mail-format-extensions.h
deleted file mode 100644
index 74638ef499..0000000000
--- a/em-format/e-mail-format-extensions.h
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * extensions.h
- *
- * 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/>
- *
- */
-
-#ifndef EXTENSIONS_H_
-#define EXTENSIONS_H_
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <em-format/e-mail-extension-registry.h>
-#include <em-format/e-mail-part.h>
-#include <widgets/misc/e-attachment-view.h>
-
-G_BEGIN_DECLS
-
-void	e_mail_formatter_internal_extensions_load	(EMailExtensionRegistry *ereg);
-void	e_mail_parser_internal_extensions_load		(EMailExtensionRegistry *ereg);
-void	e_mail_formatter_quote_internal_extensions_load	(EMailExtensionRegistry *ereg);
-void	e_mail_formatter_print_internal_extensions_load	(EMailExtensionRegistry *ereg);
-
-GType	e_mail_formatter_attachment_get_type		(void);
-GType	e_mail_formatter_attachment_bar_get_type
-							(void);
-GType	e_mail_formatter_error_get_type			(void);
-GType	e_mail_formatter_headers_get_type		(void);
-GType	e_mail_formatter_secure_button_get_type
-							(void);
-GType	e_mail_formatter_source_get_type		(void);
-GType	e_mail_formatter_image_get_type			(void);
-GType	e_mail_formatter_message_rfc822_get_type	(void);
-GType	e_mail_formatter_text_enriched_get_type		(void);
-GType	e_mail_formatter_text_html_get_type		(void);
-GType	e_mail_formatter_text_plain_get_type		(void);
-
-GType	e_mail_parser_application_mbox_get_type		(void);
-GType	e_mail_parser_attachment_bar_get_type		(void);
-GType	e_mail_parser_headers_get_type			(void);
-GType	e_mail_parser_message_get_type			(void);
-GType	e_mail_parser_secure_button_get_type		(void);
-GType	e_mail_parser_source_get_type			(void);
-GType	e_mail_parser_image_get_type			(void);
-GType	e_mail_parser_inline_pgp_encrypted_get_type	(void);
-GType	e_mail_parser_inline_pgp_signed_get_type	(void);
-GType	e_mail_parser_message_delivery_status_get_type	(void);
-GType	e_mail_parser_message_external_get_type		(void);
-GType	e_mail_parser_message_rfc822_get_type		(void);
-GType	e_mail_parser_multipart_alternative_get_type	(void);
-GType	e_mail_parser_multipart_apple_double_get_type	(void);
-GType	e_mail_parser_multipart_digest_get_type		(void);
-GType	e_mail_parser_multipart_encrypted_get_type	(void);
-GType	e_mail_parser_multipart_mixed_get_type		(void);
-GType	e_mail_parser_multipart_related_get_type	(void);
-GType	e_mail_parser_multipart_signed_get_type		(void);
-GType	e_mail_parser_text_enriched_get_type		(void);
-GType	e_mail_parser_text_html_get_type		(void);
-GType	e_mail_parser_text_plain_get_type		(void);
-#ifdef ENABLE_SMIME
-GType	e_mail_parser_application_smime_get_type	(void);
-#endif
-
-GType	e_mail_formatter_quote_attachment_get_type	(void);
-GType	e_mail_formatter_quote_headers_get_type		(void);
-GType	e_mail_formatter_quote_message_rfc822_get_type	(void);
-GType	e_mail_formatter_quote_text_enriched_get_type	(void);
-GType	e_mail_formatter_quote_text_html_get_type	(void);
-GType	e_mail_formatter_quote_text_plain_get_type	(void);
-
-GType	e_mail_formatter_print_headers_get_type		(void);
-
-G_END_DECLS
-
-#endif /* EXTENSIONS_H_ */
diff --git a/em-format/e-mail-formatter-attachment-bar.c b/em-format/e-mail-formatter-attachment-bar.c
index 0404d9cfe5..d0e52cb37e 100644
--- a/em-format/e-mail-formatter-attachment-bar.c
+++ b/em-format/e-mail-formatter-attachment-bar.c
@@ -19,7 +19,6 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-#include "e-mail-format-extensions.h"
 #include "e-mail-part-attachment-bar.h"
 #include <misc/e-attachment-bar.h>
 
@@ -31,6 +30,8 @@
 typedef EMailFormatterExtension EMailFormatterAttachmentBar;
 typedef EMailFormatterExtensionClass EMailFormatterAttachmentBarClass;
 
+GType e_mail_formatter_attachment_bar_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterAttachmentBar,
 	e_mail_formatter_attachment_bar,
diff --git a/em-format/e-mail-formatter-attachment.c b/em-format/e-mail-formatter-attachment.c
index fa0e585a14..663bf841b4 100644
--- a/em-format/e-mail-formatter-attachment.c
+++ b/em-format/e-mail-formatter-attachment.c
@@ -20,7 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
 #include "e-mail-part-attachment.h"
 #include "e-mail-part-attachment-bar.h"
 
@@ -43,6 +42,8 @@
 typedef EMailFormatterExtension EMailFormatterAttachment;
 typedef EMailFormatterExtensionClass EMailFormatterAttachmentClass;
 
+GType e_mail_formatter_attachment_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterAttachment,
 	e_mail_formatter_attachment,
diff --git a/em-format/e-mail-formatter-error.c b/em-format/e-mail-formatter-error.c
index f3bf6f6a86..16cfccb049 100644
--- a/em-format/e-mail-formatter-error.c
+++ b/em-format/e-mail-formatter-error.c
@@ -19,7 +19,6 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-#include "e-mail-format-extensions.h"
 
 #include <glib/gi18n-lib.h>
 
@@ -32,6 +31,8 @@
 typedef EMailFormatterExtension EMailFormatterError;
 typedef EMailFormatterExtensionClass EMailFormatterErrorClass;
 
+GType e_mail_formatter_error_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterError,
 	e_mail_formatter_error,
diff --git a/em-format/e-mail-formatter-headers.c b/em-format/e-mail-formatter-headers.c
index 8759ece199..56026b2025 100644
--- a/em-format/e-mail-formatter-headers.c
+++ b/em-format/e-mail-formatter-headers.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 
 #include <em-format/e-mail-formatter-extension.h>
@@ -40,6 +38,8 @@
 typedef EMailFormatterExtension EMailFormatterHeaders;
 typedef EMailFormatterExtensionClass EMailFormatterHeadersClass;
 
+GType e_mail_formatter_headers_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterHeaders,
 	e_mail_formatter_headers,
diff --git a/em-format/e-mail-formatter-image.c b/em-format/e-mail-formatter-image.c
index f06bff1897..68bef6a64c 100644
--- a/em-format/e-mail-formatter-image.c
+++ b/em-format/e-mail-formatter-image.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-parser-extension.h>
 #include <em-format/e-mail-formatter-extension.h>
 #include <em-format/e-mail-part-utils.h>
@@ -36,6 +34,8 @@
 typedef EMailFormatterExtension EMailFormatterImage;
 typedef EMailFormatterExtensionClass EMailFormatterImageClass;
 
+GType e_mail_formatter_image_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterImage,
 	e_mail_formatter_image,
diff --git a/em-format/e-mail-formatter-message-rfc822.c b/em-format/e-mail-formatter-message-rfc822.c
index 41b89f461b..261dfe8d1b 100644
--- a/em-format/e-mail-formatter-message-rfc822.c
+++ b/em-format/e-mail-formatter-message-rfc822.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 #include <glib-object.h>
 
@@ -38,6 +36,8 @@
 typedef EMailFormatterExtension EMailFormatterMessageRFC822;
 typedef EMailFormatterExtensionClass EMailFormatterMessageRFC822Class;
 
+GType e_mail_formatter_message_rfc822_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterMessageRFC822,
 	e_mail_formatter_message_rfc822,
diff --git a/em-format/e-mail-formatter-print-headers.c b/em-format/e-mail-formatter-print-headers.c
index 17e1f78291..8d183a0e9f 100644
--- a/em-format/e-mail-formatter-print-headers.c
+++ b/em-format/e-mail-formatter-print-headers.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 
 #include <em-format/e-mail-formatter-print.h>
@@ -37,6 +35,8 @@
 typedef EMailFormatterExtension EMailFormatterPrintHeaders;
 typedef EMailFormatterExtensionClass EMailFormatterPrintHeadersClass;
 
+GType e_mail_formatter_print_headers_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterPrintHeaders,
 	e_mail_formatter_print_headers,
diff --git a/em-format/e-mail-formatter-print.c b/em-format/e-mail-formatter-print.c
index 7016b2fb78..4466bed31a 100644
--- a/em-format/e-mail-formatter-print.c
+++ b/em-format/e-mail-formatter-print.c
@@ -239,9 +239,9 @@ e_mail_formatter_print_base_init (EMailFormatterPrintClass *class)
 	/* Register internal extensions. */
 	g_type_ensure (e_mail_formatter_print_headers_get_type ());
 
-	e_mail_formatter_print_internal_extensions_load (
-		E_MAIL_EXTENSION_REGISTRY (
-			E_MAIL_FORMATTER_CLASS (class)->extension_registry));
+	e_mail_formatter_extension_registry_load (
+		E_MAIL_FORMATTER_CLASS (class)->extension_registry,
+		E_TYPE_MAIL_FORMATTER_PRINT_EXTENSION);
 
 	E_MAIL_FORMATTER_CLASS (class)->text_html_flags =
 		CAMEL_MIME_FILTER_TOHTML_CONVERT_NL |
diff --git a/em-format/e-mail-formatter-quote-attachment.c b/em-format/e-mail-formatter-quote-attachment.c
index 6613c27b8d..5086a3fd0f 100644
--- a/em-format/e-mail-formatter-quote-attachment.c
+++ b/em-format/e-mail-formatter-quote-attachment.c
@@ -20,7 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
 #include "e-mail-part-attachment.h"
 
 #include <em-format/e-mail-formatter-quote.h>
@@ -35,6 +34,8 @@
 typedef EMailFormatterExtension EMailFormatterQuoteAttachment;
 typedef EMailFormatterExtensionClass EMailFormatterQuoteAttachmentClass;
 
+GType e_mail_formatter_quote_attachment_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterQuoteAttachment,
 	e_mail_formatter_quote_attachment,
diff --git a/em-format/e-mail-formatter-quote-headers.c b/em-format/e-mail-formatter-quote-headers.c
index a97c5b1964..4af48418dd 100644
--- a/em-format/e-mail-formatter-quote-headers.c
+++ b/em-format/e-mail-formatter-quote-headers.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 
 #include <em-format/e-mail-formatter-quote.h>
@@ -37,6 +35,8 @@
 typedef EMailFormatterExtension EMailFormatterQuoteHeaders;
 typedef EMailFormatterExtensionClass EMailFormatterQuoteHeadersClass;
 
+GType e_mail_formatter_quote_headers_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterQuoteHeaders,
 	e_mail_formatter_quote_headers,
diff --git a/em-format/e-mail-formatter-quote-message-rfc822.c b/em-format/e-mail-formatter-quote-message-rfc822.c
index cb33fc1c01..e891bce69f 100644
--- a/em-format/e-mail-formatter-quote-message-rfc822.c
+++ b/em-format/e-mail-formatter-quote-message-rfc822.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 #include <glib-object.h>
 
@@ -37,6 +35,8 @@
 typedef EMailFormatterExtension EMailFormatterQuoteMessageRFC822;
 typedef EMailFormatterExtensionClass EMailFormatterQuoteMessageRFC822Class;
 
+GType e_mail_formatter_quote_message_rfc822_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterQuoteMessageRFC822,
 	e_mail_formatter_quote_message_rfc822,
diff --git a/em-format/e-mail-formatter-quote-text-enriched.c b/em-format/e-mail-formatter-quote-text-enriched.c
index 82f6dc06e5..9bbbc534c4 100644
--- a/em-format/e-mail-formatter-quote-text-enriched.c
+++ b/em-format/e-mail-formatter-quote-text-enriched.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-quote.h>
 #include <em-format/e-mail-inline-filter.h>
 #include <e-util/e-util.h>
@@ -32,6 +30,8 @@
 typedef EMailFormatterExtension EMailFormatterQuoteTextEnriched;
 typedef EMailFormatterExtensionClass EMailFormatterQuoteTextEnrichedClass;
 
+GType e_mail_formatter_quote_text_enriched_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterQuoteTextEnriched,
 	e_mail_formatter_quote_text_enriched,
diff --git a/em-format/e-mail-formatter-quote-text-html.c b/em-format/e-mail-formatter-quote-text-html.c
index ac414ea939..4d3a71f4af 100644
--- a/em-format/e-mail-formatter-quote-text-html.c
+++ b/em-format/e-mail-formatter-quote-text-html.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-quote.h>
 #include <em-format/e-mail-stripsig-filter.h>
 #include <em-format/e-mail-part-utils.h>
@@ -35,6 +33,8 @@
 typedef EMailFormatterExtension EMailFormatterQuoteTextHTML;
 typedef EMailFormatterExtensionClass EMailFormatterQuoteTextHTMLClass;
 
+GType e_mail_formatter_quote_text_html_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterQuoteTextHTML,
 	e_mail_formatter_quote_text_html,
diff --git a/em-format/e-mail-formatter-quote-text-plain.c b/em-format/e-mail-formatter-quote-text-plain.c
index b3525e72d5..5f14c8ea1e 100644
--- a/em-format/e-mail-formatter-quote-text-plain.c
+++ b/em-format/e-mail-formatter-quote-text-plain.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-quote.h>
 #include <em-format/e-mail-part-utils.h>
 #include <em-format/e-mail-stripsig-filter.h>
@@ -33,6 +31,8 @@
 typedef EMailFormatterExtension EMailFormatterQuoteTextPlain;
 typedef EMailFormatterExtensionClass EMailFormatterQuoteTextPlainClass;
 
+GType e_mail_formatter_quote_text_plain_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterQuoteTextPlain,
 	e_mail_formatter_quote_text_plain,
diff --git a/em-format/e-mail-formatter-quote.c b/em-format/e-mail-formatter-quote.c
index a8833eef9d..1a2d84deba 100644
--- a/em-format/e-mail-formatter-quote.c
+++ b/em-format/e-mail-formatter-quote.c
@@ -170,9 +170,9 @@ e_mail_formatter_quote_base_init (EMailFormatterQuoteClass *class)
 	g_type_ensure (e_mail_formatter_quote_text_html_get_type ());
 	g_type_ensure (e_mail_formatter_quote_text_plain_get_type ());
 
-	e_mail_formatter_quote_internal_extensions_load (
-		E_MAIL_EXTENSION_REGISTRY (
-			E_MAIL_FORMATTER_CLASS (class)->extension_registry));
+	e_mail_formatter_extension_registry_load (
+		E_MAIL_FORMATTER_CLASS (class)->extension_registry,
+		E_TYPE_MAIL_FORMATTER_QUOTE_EXTENSION);
 
 	E_MAIL_FORMATTER_CLASS (class)->text_html_flags =
 		CAMEL_MIME_FILTER_TOHTML_PRE |
diff --git a/em-format/e-mail-formatter-secure-button.c b/em-format/e-mail-formatter-secure-button.c
index 164cb19198..f5f51d2242 100644
--- a/em-format/e-mail-formatter-secure-button.c
+++ b/em-format/e-mail-formatter-secure-button.c
@@ -19,7 +19,6 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-#include "e-mail-format-extensions.h"
 
 #include <glib/gi18n-lib.h>
 
@@ -37,6 +36,8 @@
 typedef EMailFormatterExtension EMailFormatterSecureButton;
 typedef EMailFormatterExtensionClass EMailFormatterSecureButtonClass;
 
+GType e_mail_formatter_secure_button_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterSecureButton,
 	e_mail_formatter_secure_button,
diff --git a/em-format/e-mail-formatter-source.c b/em-format/e-mail-formatter-source.c
index 26e9d92d7b..b37af49026 100644
--- a/em-format/e-mail-formatter-source.c
+++ b/em-format/e-mail-formatter-source.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-extension.h>
 #include <em-format/e-mail-formatter.h>
 #include <em-format/e-mail-inline-filter.h>
@@ -33,6 +31,8 @@
 typedef EMailFormatterExtension EMailFormatterSource;
 typedef EMailFormatterExtensionClass EMailFormatterSourceClass;
 
+GType e_mail_formatter_source_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterSource,
 	e_mail_formatter_source,
diff --git a/em-format/e-mail-formatter-text-enriched.c b/em-format/e-mail-formatter-text-enriched.c
index ce2769d229..be3b1b029b 100644
--- a/em-format/e-mail-formatter-text-enriched.c
+++ b/em-format/e-mail-formatter-text-enriched.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-extension.h>
 #include <em-format/e-mail-formatter.h>
 #include <em-format/e-mail-inline-filter.h>
@@ -33,6 +31,8 @@
 typedef EMailFormatterExtension EMailFormatterTextEnriched;
 typedef EMailFormatterExtensionClass EMailFormatterTextEnrichedClass;
 
+GType e_mail_formatter_text_enriched_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterTextEnriched,
 	e_mail_formatter_text_enriched,
diff --git a/em-format/e-mail-formatter-text-html.c b/em-format/e-mail-formatter-text-html.c
index c3b190fea2..aabfa72a98 100644
--- a/em-format/e-mail-formatter-text-html.c
+++ b/em-format/e-mail-formatter-text-html.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-extension.h>
 #include <em-format/e-mail-formatter.h>
 #include <em-format/e-mail-inline-filter.h>
@@ -37,6 +35,8 @@
 typedef EMailFormatterExtension EMailFormatterTextHTML;
 typedef EMailFormatterExtensionClass EMailFormatterTextHTMLClass;
 
+GType e_mail_formatter_text_html_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterTextHTML,
 	e_mail_formatter_text_html,
diff --git a/em-format/e-mail-formatter-text-plain.c b/em-format/e-mail-formatter-text-plain.c
index 9a3b31ac60..afe5ed200d 100644
--- a/em-format/e-mail-formatter-text-plain.c
+++ b/em-format/e-mail-formatter-text-plain.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-formatter-extension.h>
 #include <em-format/e-mail-formatter.h>
 #include <em-format/e-mail-inline-filter.h>
@@ -34,6 +32,8 @@
 typedef EMailFormatterExtension EMailFormatterTextPlain;
 typedef EMailFormatterExtensionClass EMailFormatterTextPlainClass;
 
+GType e_mail_formatter_text_plain_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailFormatterTextPlain,
 	e_mail_formatter_text_plain,
diff --git a/em-format/e-mail-formatter.c b/em-format/e-mail-formatter.c
index 5ab7f5c2dc..bc671b8072 100644
--- a/em-format/e-mail-formatter.c
+++ b/em-format/e-mail-formatter.c
@@ -528,8 +528,9 @@ e_mail_formatter_base_init (EMailFormatterClass *class)
 	class->extension_registry = g_object_new (
 		E_TYPE_MAIL_FORMATTER_EXTENSION_REGISTRY, NULL);
 
-	e_mail_formatter_internal_extensions_load (
-		E_MAIL_EXTENSION_REGISTRY (class->extension_registry));
+	e_mail_formatter_extension_registry_load (
+		class->extension_registry,
+		E_TYPE_MAIL_FORMATTER_EXTENSION);
 
 	e_extensible_load_extensions (
 		E_EXTENSIBLE (class->extension_registry));
diff --git a/em-format/e-mail-parser-application-mbox.c b/em-format/e-mail-parser-application-mbox.c
index 36fa6d5f01..7007b89624 100644
--- a/em-format/e-mail-parser-application-mbox.c
+++ b/em-format/e-mail-parser-application-mbox.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib-object.h>
 #include <glib/gi18n-lib.h>
 
@@ -37,6 +35,8 @@
 typedef EMailParserExtension EMailParserApplicationMBox;
 typedef EMailParserExtensionClass EMailParserApplicationMBoxClass;
 
+GType e_mail_parser_application_mbox_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserApplicationMBox,
 	e_mail_parser_application_mbox,
diff --git a/em-format/e-mail-parser-application-smime.c b/em-format/e-mail-parser-application-smime.c
index 21593d326e..4f42b26825 100644
--- a/em-format/e-mail-parser-application-smime.c
+++ b/em-format/e-mail-parser-application-smime.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib-object.h>
 #include <glib/gi18n-lib.h>
 
@@ -37,6 +35,8 @@
 typedef EMailParserExtension EMailParserApplicationSMIME;
 typedef EMailParserExtensionClass EMailParserApplicationSMIMEClass;
 
+GType e_mail_parser_application_smime_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserApplicationSMIME,
 	e_mail_parser_application_smime,
diff --git a/em-format/e-mail-parser-attachment-bar.c b/em-format/e-mail-parser-attachment-bar.c
index 8b4489ec8b..a8939371c5 100644
--- a/em-format/e-mail-parser-attachment-bar.c
+++ b/em-format/e-mail-parser-attachment-bar.c
@@ -19,7 +19,6 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-#include "e-mail-format-extensions.h"
 
 #include <glib/gi18n-lib.h>
 #include "e-mail-part-attachment-bar.h"
@@ -45,6 +44,8 @@ mail_part_attachment_bar_free (EMailPart *part)
 typedef EMailParserExtension EMailParserAttachmentBar;
 typedef EMailParserExtensionClass EMailParserAttachmentBarClass;
 
+GType e_mail_parser_attachment_bar_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserAttachmentBar,
 	e_mail_parser_attachment_bar,
diff --git a/em-format/e-mail-parser-headers.c b/em-format/e-mail-parser-headers.c
index 4646fd3107..d81089d384 100644
--- a/em-format/e-mail-parser-headers.c
+++ b/em-format/e-mail-parser-headers.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 
 #include <em-format/e-mail-parser-extension.h>
@@ -36,6 +34,8 @@
 typedef EMailParserExtension EMailParserHeaders;
 typedef EMailParserExtensionClass EMailParserHeadersClass;
 
+GType e_mail_parser_headers_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserHeaders,
 	e_mail_parser_headers,
diff --git a/em-format/e-mail-parser-image.c b/em-format/e-mail-parser-image.c
index 976cfe4463..4ad4b617bf 100644
--- a/em-format/e-mail-parser-image.c
+++ b/em-format/e-mail-parser-image.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <em-format/e-mail-parser-extension.h>
 #include <em-format/e-mail-part-utils.h>
 #include <em-format/e-mail-parser.h>
@@ -33,6 +31,8 @@
 typedef EMailParserExtension EMailParserImage;
 typedef EMailParserExtensionClass EMailParserImageClass;
 
+GType e_mail_parser_image_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserImage,
 	e_mail_parser_image,
diff --git a/em-format/e-mail-parser-inlinepgp-encrypted.c b/em-format/e-mail-parser-inlinepgp-encrypted.c
index 709446c2bb..5db01aeff6 100644
--- a/em-format/e-mail-parser-inlinepgp-encrypted.c
+++ b/em-format/e-mail-parser-inlinepgp-encrypted.c
@@ -20,8 +20,6 @@
 #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>
@@ -35,6 +33,8 @@
 typedef EMailParserExtension EMailParserInlinePGPEncrypted;
 typedef EMailParserExtensionClass EMailParserInlinePGPEncryptedClass;
 
+GType e_mail_parser_inline_pgp_encrypted_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserInlinePGPEncrypted,
 	e_mail_parser_inline_pgp_encrypted,
diff --git a/em-format/e-mail-parser-inlinepgp-signed.c b/em-format/e-mail-parser-inlinepgp-signed.c
index 77df84743e..cec1db0594 100644
--- a/em-format/e-mail-parser-inlinepgp-signed.c
+++ b/em-format/e-mail-parser-inlinepgp-signed.c
@@ -20,8 +20,6 @@
 #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>
@@ -35,6 +33,8 @@
 typedef EMailParserExtension EMailParserInlinePGPSigned;
 typedef EMailParserExtensionClass EMailParserInlinePGPSignedClass;
 
+GType e_mail_parser_inline_pgp_signed_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserInlinePGPSigned,
 	e_mail_parser_inline_pgp_signed,
diff --git a/em-format/e-mail-parser-message-deliverystatus.c b/em-format/e-mail-parser-message-deliverystatus.c
index 3acbff7ea3..e99adbc6a1 100644
--- a/em-format/e-mail-parser-message-deliverystatus.c
+++ b/em-format/e-mail-parser-message-deliverystatus.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib-object.h>
 
 #include <em-format/e-mail-parser-extension.h>
@@ -35,6 +33,8 @@
 typedef EMailParserExtension EMailParserMessageDeliveryStatus;
 typedef EMailParserExtensionClass EMailParserMessageDeliveryStatusClass;
 
+GType e_mail_parser_message_delivery_status_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMessageDeliveryStatus,
 	e_mail_parser_message_delivery_status,
diff --git a/em-format/e-mail-parser-message-external.c b/em-format/e-mail-parser-message-external.c
index 8c355fbd15..0c49497869 100644
--- a/em-format/e-mail-parser-message-external.c
+++ b/em-format/e-mail-parser-message-external.c
@@ -20,8 +20,6 @@
 #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 <e-util/e-util.h>
@@ -35,6 +33,8 @@
 typedef EMailParserExtension EMailParserMessageExternal;
 typedef EMailParserExtensionClass EMailParserMessageExternalClass;
 
+GType e_mail_parser_message_external_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMessageExternal,
 	e_mail_parser_message_external,
diff --git a/em-format/e-mail-parser-message-rfc822.c b/em-format/e-mail-parser-message-rfc822.c
index 5239c3c743..2fbfb2d287 100644
--- a/em-format/e-mail-parser-message-rfc822.c
+++ b/em-format/e-mail-parser-message-rfc822.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 #include <glib-object.h>
 
@@ -38,6 +36,8 @@
 typedef EMailParserExtension EMailParserMessageRFC822;
 typedef EMailParserExtensionClass EMailParserMessageRFC822Class;
 
+GType e_mail_parser_message_rfc822_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMessageRFC822,
 	e_mail_parser_message_rfc822,
diff --git a/em-format/e-mail-parser-message.c b/em-format/e-mail-parser-message.c
index 1039d9a8bd..3adbc55305 100644
--- a/em-format/e-mail-parser-message.c
+++ b/em-format/e-mail-parser-message.c
@@ -20,8 +20,6 @@
 #include <config.h>
 #endif
 
-#include "e-mail-format-extensions.h"
-
 #include <glib/gi18n-lib.h>
 
 #include <em-format/e-mail-parser-extension.h>
@@ -37,6 +35,8 @@
 typedef EMailParserExtension EMailParserMessage;
 typedef EMailParserExtensionClass EMailParserMessageClass;
 
+GType e_mail_parser_message_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMessage,
 	e_mail_parser_message,
diff --git a/em-format/e-mail-parser-multipart-alternative.c b/em-format/e-mail-parser-multipart-alternative.c
index d19137bd75..902812b02f 100644
--- a/em-format/e-mail-parser-multipart-alternative.c
+++ b/em-format/e-mail-parser-multipart-alternative.c
@@ -20,8 +20,6 @@
 #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>
@@ -34,6 +32,8 @@
 typedef EMailParserExtension EMailParserMultipartAlternative;
 typedef EMailParserExtensionClass EMailParserMultipartAlternativeClass;
 
+GType e_mail_parser_multipart_alternative_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartAlternative,
 	e_mail_parser_multipart_alternative,
diff --git a/em-format/e-mail-parser-multipart-appledouble.c b/em-format/e-mail-parser-multipart-appledouble.c
index 3fe0181ef5..add3fad384 100644
--- a/em-format/e-mail-parser-multipart-appledouble.c
+++ b/em-format/e-mail-parser-multipart-appledouble.c
@@ -20,8 +20,6 @@
 #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>
 
@@ -30,6 +28,8 @@
 typedef EMailParserExtension EMailParserMultipartAppleDouble;
 typedef EMailParserExtensionClass EMailParserMultipartAppleDoubleClass;
 
+GType e_mail_parser_multipart_apple_double_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartAppleDouble,
 	e_mail_parser_multipart_apple_double,
diff --git a/em-format/e-mail-parser-multipart-digest.c b/em-format/e-mail-parser-multipart-digest.c
index 6f22a44572..b62d066411 100644
--- a/em-format/e-mail-parser-multipart-digest.c
+++ b/em-format/e-mail-parser-multipart-digest.c
@@ -20,8 +20,6 @@
 #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 <e-util/e-util.h>
@@ -33,6 +31,8 @@
 typedef EMailParserExtension EMailParserMultipartDigest;
 typedef EMailParserExtensionClass EMailParserMultipartDigestClass;
 
+GType e_mail_parser_multipart_digest_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartDigest,
 	e_mail_parser_multipart_digest,
diff --git a/em-format/e-mail-parser-multipart-encrypted.c b/em-format/e-mail-parser-multipart-encrypted.c
index 6a08adc5ef..fa358013fb 100644
--- a/em-format/e-mail-parser-multipart-encrypted.c
+++ b/em-format/e-mail-parser-multipart-encrypted.c
@@ -20,8 +20,6 @@
 #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>
@@ -33,6 +31,8 @@
 typedef EMailParserExtension EMailParserMultipartEncrypted;
 typedef EMailParserExtensionClass EMailParserMultipartEncryptedClass;
 
+GType e_mail_parser_multipart_encrypted_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartEncrypted,
 	e_mail_parser_multipart_encrypted,
diff --git a/em-format/e-mail-parser-multipart-mixed.c b/em-format/e-mail-parser-multipart-mixed.c
index 6a202bd889..8a2bfd930a 100644
--- a/em-format/e-mail-parser-multipart-mixed.c
+++ b/em-format/e-mail-parser-multipart-mixed.c
@@ -20,8 +20,6 @@
 #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 <e-util/e-util.h>
@@ -34,6 +32,8 @@
 typedef EMailParserExtension EMailParserMultipartMixed;
 typedef EMailParserExtensionClass EMailParserMultipartMixedClass;
 
+GType e_mail_parser_multipart_mixed_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartMixed,
 	e_mail_parser_multipart_mixed,
diff --git a/em-format/e-mail-parser-multipart-related.c b/em-format/e-mail-parser-multipart-related.c
index a9ae149241..a9beac570f 100644
--- a/em-format/e-mail-parser-multipart-related.c
+++ b/em-format/e-mail-parser-multipart-related.c
@@ -20,8 +20,6 @@
 #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>
@@ -34,6 +32,8 @@
 typedef EMailParserExtension EMailParserMultipartRelated;
 typedef EMailParserExtensionClass EMailParserMultipartRelatedClass;
 
+GType e_mail_parser_multipart_related_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartRelated,
 	e_mail_parser_multipart_related,
diff --git a/em-format/e-mail-parser-multipart-signed.c b/em-format/e-mail-parser-multipart-signed.c
index 20a257758f..05e64a8df8 100644
--- a/em-format/e-mail-parser-multipart-signed.c
+++ b/em-format/e-mail-parser-multipart-signed.c
@@ -20,8 +20,6 @@
 #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>
@@ -33,6 +31,8 @@
 typedef EMailParserExtension EMailParserMultipartSigned;
 typedef EMailParserExtensionClass EMailParserMultipartSignedClass;
 
+GType e_mail_parser_multipart_signed_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserMultipartSigned,
 	e_mail_parser_multipart_signed,
diff --git a/em-format/e-mail-parser-secure-button.c b/em-format/e-mail-parser-secure-button.c
index c590fba426..cb1f98ee7f 100644
--- a/em-format/e-mail-parser-secure-button.c
+++ b/em-format/e-mail-parser-secure-button.c
@@ -19,7 +19,6 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-#include "e-mail-format-extensions.h"
 
 #include <glib/gi18n-lib.h>
 
@@ -32,6 +31,8 @@
 typedef EMailParserExtension EMailParserSecureButton;
 typedef EMailParserExtensionClass EMailParserSecureButtonClass;
 
+GType e_mail_parser_secure_button_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserSecureButton,
 	e_mail_parser_secure_button,
diff --git a/em-format/e-mail-parser-source.c b/em-format/e-mail-parser-source.c
index b41fdccdf6..0521650966 100644
--- a/em-format/e-mail-parser-source.c
+++ b/em-format/e-mail-parser-source.c
@@ -20,8 +20,6 @@
 #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 <e-util/e-util.h>
@@ -32,6 +30,8 @@
 typedef EMailParserExtension EMailParserSource;
 typedef EMailParserExtensionClass EMailParserSourceClass;
 
+GType e_mail_parser_source_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserSource,
 	e_mail_parser_source,
diff --git a/em-format/e-mail-parser-text-enriched.c b/em-format/e-mail-parser-text-enriched.c
index bc5ab75efa..18b72512c1 100644
--- a/em-format/e-mail-parser-text-enriched.c
+++ b/em-format/e-mail-parser-text-enriched.c
@@ -20,8 +20,6 @@
 #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>
@@ -33,6 +31,8 @@
 typedef EMailParserExtension EMailParserTextEnriched;
 typedef EMailParserExtensionClass EMailParserTextEnrichedClass;
 
+GType e_mail_parser_text_enriched_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserTextEnriched,
 	e_mail_parser_text_enriched,
diff --git a/em-format/e-mail-parser-text-html.c b/em-format/e-mail-parser-text-html.c
index 0b2841683a..0014e2c4bc 100644
--- a/em-format/e-mail-parser-text-html.c
+++ b/em-format/e-mail-parser-text-html.c
@@ -20,8 +20,6 @@
 #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>
@@ -35,6 +33,8 @@
 typedef EMailParserExtension EMailParserTextHTML;
 typedef EMailParserExtensionClass EMailParserTextHTMLClass;
 
+GType e_mail_parser_text_html_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserTextHTML,
 	e_mail_parser_text_html,
diff --git a/em-format/e-mail-parser-text-plain.c b/em-format/e-mail-parser-text-plain.c
index 354937aff2..f5e3064a91 100644
--- a/em-format/e-mail-parser-text-plain.c
+++ b/em-format/e-mail-parser-text-plain.c
@@ -20,8 +20,6 @@
 #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-inline-filter.h>
@@ -35,6 +33,8 @@
 typedef EMailParserExtension EMailParserTextPlain;
 typedef EMailParserExtensionClass EMailParserTextPlainClass;
 
+GType e_mail_parser_text_plain_get_type (void);
+
 G_DEFINE_TYPE (
 	EMailParserTextPlain,
 	e_mail_parser_text_plain,
diff --git a/em-format/e-mail-parser.c b/em-format/e-mail-parser.c
index a8b429f38e..4ba17bb681 100644
--- a/em-format/e-mail-parser.c
+++ b/em-format/e-mail-parser.c
@@ -237,8 +237,7 @@ e_mail_parser_base_init (EMailParserClass *class)
 	class->extension_registry = g_object_new (
 		E_TYPE_MAIL_PARSER_EXTENSION_REGISTRY, NULL);
 
-	e_mail_parser_internal_extensions_load (
-		E_MAIL_EXTENSION_REGISTRY (class->extension_registry));
+	e_mail_parser_extension_registry_load (class->extension_registry);
 
 	e_extensible_load_extensions (E_EXTENSIBLE (class->extension_registry));
 }