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-rw-r--r--libdocument/ev-document.h22
1 files changed, 20 insertions, 2 deletions
diff --git a/libdocument/ev-document.h b/libdocument/ev-document.h
index 6e7232b..bc040d1 100644
--- 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 \