X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=libdocument%2Fev-document.h;h=3ab918adb6f6724e20a1c3d2c099a1efcf601ebe;hb=8108f28c648da47151a9f4f6cd3646fdd223841d;hp=367d6e6af39a518ab304fc98954c3ef05aeb8e9b;hpb=e71d27db284ccf431167816167bf72f1e23c334d;p=evince.git

diff --git a/libdocument/ev-document.h b/libdocument/ev-document.h
index 367d6e6a..3ab918ad 100644
--- a/libdocument/ev-document.h
+++ b/libdocument/ev-document.h
@@ -19,6 +19,10 @@
  *  $Id$
  */
 
+#if !defined (__EV_EVINCE_DOCUMENT_H_INSIDE__) && !defined (EVINCE_COMPILATION)
+#error "Only <evince-document.h> can be included directly."
+#endif
+
 #ifndef EV_DOCUMENT_H
 #define EV_DOCUMENT_H
 
@@ -178,7 +182,7 @@ static void     backend_name##_class_intern_init (gpointer klass)		\
 G_MODULE_EXPORT GType								\
 register_evince_backend (GTypeModule *module)					\
 {										\
-	static const GTypeInfo our_info = {  				        \
+	const GTypeInfo our_info = {  				        \
 		sizeof (BackendName##Class),					\
 		NULL, /* base_init */						\
 		NULL, /* base_finalize */					\
@@ -216,6 +220,56 @@ register_evince_backend (GTypeModule *module)					\
 #define EV_BACKEND_REGISTER(BackendName, backend_name)			\
 	EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, ;)
 
+/*
+ * A convenience macro for boxed type implementations, which defines a
+ * type_name_get_type() function registering the boxed type.
+ */
+#define EV_DEFINE_BOXED_TYPE(TypeName, type_name, copy_func, free_func)               \
+GType                                                                                 \
+type_name##_get_type (void)                                                           \
+{                                                                                     \
+        static volatile gsize g_define_type_id__volatile = 0;                         \
+	if (g_once_init_enter (&g_define_type_id__volatile)) {                        \
+	        GType g_define_type_id =                                              \
+		    g_boxed_type_register_static (g_intern_static_string (#TypeName), \
+		                                  (GBoxedCopyFunc) copy_func,         \
+						  (GBoxedFreeFunc) free_func);        \
+		g_once_init_leave (&g_define_type_id__volatile, g_define_type_id);    \
+	}                                                                             \
+	return g_define_type_id__volatile;                                            \
+}
+
+/* A convenience macro for GTypeInterface definitions, which declares
+ * a default vtable initialization function and defines a *_get_type()
+ * function.
+ *
+ * The macro expects the interface initialization function to have the
+ * name <literal>t_n ## _default_init</literal>, and the interface
+ * structure to have the name <literal>TN ## Interface</literal>.
+ */
+#define EV_DEFINE_INTERFACE(TypeName, type_name, TYPE_PREREQ)	                             \
+static void     type_name##_class_init        (TypeName##Iface *klass);                      \
+                                                                                             \
+GType                                                                                        \
+type_name##_get_type (void)                                                                  \
+{                                                                                            \
+        static volatile gsize g_define_type_id__volatile = 0;                                \
+	if (g_once_init_enter (&g_define_type_id__volatile)) {                               \
+		GType g_define_type_id =                                                     \
+		    g_type_register_static_simple (G_TYPE_INTERFACE,                         \
+		                                   g_intern_static_string (#TypeName),       \
+		                                   sizeof (TypeName##Iface),                 \
+		                                   (GClassInitFunc)type_name##_class_init,   \
+		                                   0,                                        \
+		                                   (GInstanceInitFunc)NULL,                  \
+						   (GTypeFlags) 0);                          \
+		if (TYPE_PREREQ)                                                             \
+			g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ);   \
+		g_once_init_leave (&g_define_type_id__volatile, g_define_type_id);           \
+	}                                                                                    \
+	return g_define_type_id__volatile;                                                   \
+}
+		
 G_END_DECLS
 
 #endif /* EV_DOCUMENT_H */