Use g_type_module_add_interface instead of g_type_add_interface_static.

[evince.git] / libdocument / ev-document.h

diff --git a/libdocument/ev-document.h b/libdocument/ev-document.h
index 6e7232bb0d7686036cec931f476364ee76ace5d2..bc040d14fa93913d8004d31576405c2b7e1f396e 100644 (file)
--- a/libdocument/ev-document.h
+++ b/libdocument/ev-document.h
@@ -126,6 +126,24 @@ cairo_surface_t *ev_document_render           (EvDocument      *document,
 gint            ev_rect_cmp                   (EvRectangle     *a,
                                                EvRectangle     *b);
 
+/* convenience macro to ease interface addition in the CODE
+ * section of EV_BACKEND_REGISTER_WITH_CODE (this macro relies on
+ * the g_define_type_id present within EV_BACKEND_REGISTER_WITH_CODE()).
+ * usage example:
+ * EV_BACKEND_REGISTER_WITH_CODE (PdfDocument, pdf_document,
+ *                          EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
+ *                                                 pdf_document_document_thumbnails_iface_init));
+ */
+#define EV_BACKEND_IMPLEMENT_INTERFACE(TYPE_IFACE, iface_init) {                \
+       const GInterfaceInfo g_implement_interface_info = {                     \
+               (GInterfaceInitFunc) iface_init, NULL, NULL                     \
+       };                                                                      \
+       g_type_module_add_interface (module,                                    \
+                                    g_define_type_id,                          \
+                                    TYPE_IFACE,                                \
+                                    &g_implement_interface_info);              \
+}
+
 /*
  * Utility macro used to register backends
  *
@@ -174,8 +192,8 @@ register_evince_backend (GTypeModule *module)                                       \
                                            #BackendName,                       \
                                            &our_info,                          \
                                           (GTypeFlags)0);                      \
-                                                                               \
-       G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,                                \
+                                                                               \
+       EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,                       \
                                backend_name##_document_iface_init);             \
                                                                                \
        CODE                                                                    \