Plugin system for backends. Fixes bug #351348.

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

diff --git a/libdocument/ev-document.h b/libdocument/ev-document.h
index 4f83553eca2ae772339d5b7fab924c0bff26a64f..6e7232bb0d7686036cec931f476364ee76ace5d2 100644 (file)
--- a/libdocument/ev-document.h
+++ b/libdocument/ev-document.h
@@ -123,8 +123,74 @@ GList           *ev_document_get_attachments  (EvDocument      *document);
 cairo_surface_t *ev_document_render           (EvDocument      *document,
                                                EvRenderContext *rc);
 
-gint            ev_rect_cmp                   (EvRectangle    *a,
-                                               EvRectangle    *b);
+gint            ev_rect_cmp                   (EvRectangle     *a,
+                                               EvRectangle     *b);
+
+/*
+ * Utility macro used to register backends
+ *
+ * use: EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, CODE)
+ */
+#define EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, CODE)         \
+                                                                               \
+static GType g_define_type_id = 0;                                             \
+                                                                               \
+GType                                                                          \
+backend_name##_get_type (void)                                                 \
+{                                                                              \
+       return g_define_type_id;                                                \
+}                                                                              \
+                                                                               \
+static void     backend_name##_init              (BackendName        *self);   \
+static void     backend_name##_class_init        (BackendName##Class *klass);  \
+static gpointer backend_name##_parent_class = NULL;                            \
+static void     backend_name##_class_intern_init (gpointer klass)              \
+{                                                                              \
+       backend_name##_parent_class = g_type_class_peek_parent (klass);         \
+       backend_name##_class_init ((BackendName##Class *) klass);               \
+}                                                                              \
+                                                                               \
+G_MODULE_EXPORT GType                                                          \
+register_evince_backend (GTypeModule *module)                                  \
+{                                                                              \
+       static const GTypeInfo our_info = {                                     \
+               sizeof (BackendName##Class),                                    \
+               NULL, /* base_init */                                           \
+               NULL, /* base_finalize */                                       \
+               (GClassInitFunc) backend_name##_class_intern_init,              \
+               NULL,                                                           \
+               NULL, /* class_data */                                          \
+               sizeof (BackendName),                                           \
+               0, /* n_preallocs */                                            \
+               (GInstanceInitFunc) backend_name##_init                         \
+       };                                                                      \
+                                                                               \
+       /* Initialise the i18n stuff */                                         \
+       bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR);                       \
+       bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");                     \
+                                                                                \
+       g_define_type_id = g_type_module_register_type (module,                 \
+                                           G_TYPE_OBJECT,                      \
+                                           #BackendName,                       \
+                                           &our_info,                          \
+                                          (GTypeFlags)0);                      \
+                                                                               \
+       G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,                                \
+                               backend_name##_document_iface_init);             \
+                                                                               \
+       CODE                                                                    \
+                                                                               \
+       return g_define_type_id;                                                \
+}
+
+/*
+ * Utility macro used to register backend
+ *
+ * use: EV_BACKEND_REGISTER(BackendName, backend_name)
+ */
+#define EV_BACKEND_REGISTER(BackendName, backend_name)                 \
+       EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, ;)
+
 G_END_DECLS
 
 #endif /* EV_DOCUMENT_H */