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-/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
-
- eel-gtk-macros.h: Macros to reduce boilerplate when using GTK.
-
- Copyright (C) 1999, 2000, 2001 Eazel, Inc.
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this program; if not, write to the
- Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- Boston, MA 02110-1301, USA.
-
- Authors: Darin Adler <[email protected]>
- Ramiro Estrugo <[email protected]>
-*/
-
-#ifndef EEL_GTK_MACROS_H
-#define EEL_GTK_MACROS_H
-
-#ifndef EEL_DISABLE_DEPRECATED
-
-/* Define a parent_class global and a get_type function for a GTK class.
- Since this is boilerplate, it's better not to repeat it over and over again.
- Called like this:
-
- EEL_CLASS_BOILERPLATE (EelBookmark, eel_bookmark, GTK_TYPE_OBJECT)
-
- The parent_class_type parameter is guaranteed to be evaluated only once
- so it can be an expression, even an expression that contains a function call.
-*/
-
-#define EEL_CLASS_BOILERPLATE(class_name, prefix, parent_class_type) \
- EEL_BOILERPLATE (class_name, class_name, prefix, parent_class_type, \
- EEL_REGISTER_TYPE)
-#define EEL_REGISTER_TYPE(class_name, corba_name) \
- g_type_register_static (parent_type, #class_name, &info, 0)
-
-#define EEL_BOILERPLATE(class_name, corba_name, prefix, parent_class_type, \
- register_type) \
- \
-static gpointer parent_class; \
- \
-GType \
-prefix##_get_type (void) \
-{ \
- GType parent_type; \
- static GType type; \
- \
- if (type == 0) { \
- static GTypeInfo info = { \
- sizeof (class_name##Class), \
- NULL, NULL, \
- (GClassInitFunc) prefix##_class_init, \
- NULL, NULL, \
- sizeof (class_name), 0, \
- (GInstanceInitFunc) prefix##_init, \
- NULL \
- }; \
- \
- parent_type = (parent_class_type); \
- type = register_type (class_name, corba_name); \
- parent_class = g_type_class_ref (parent_type); \
- } \
- \
- return type; \
-}
-
-/* Call a parent class version of a virtual function (or default
- * signal handler since that's the same thing). Nice because it
- * documents what it's doing and there is less chance for a
- * typo. Depends on the parent class pointer having the conventional
- * name "parent_class" as the boilerplate macro above does it.
- */
-#define EEL_CALL_PARENT(parent_class_cast_macro, signal, parameters) \
- \
-G_STMT_START { \
- if (parent_class_cast_macro (parent_class)->signal != NULL) { \
- (* parent_class_cast_macro (parent_class)->signal) parameters;\
- } \
-} G_STMT_END
-
-/* Same thing, for functions with a return value. */
-#define EEL_CALL_PARENT_WITH_RETURN_VALUE(parent_class_cast_macro, signal, \
- parameters) \
- \
-(parent_class_cast_macro (parent_class)->signal == NULL) \
- ? 0 \
- : ((* parent_class_cast_macro (parent_class)->signal) parameters)
-
-#endif /* EEL_DISABLE_DEPRECATED */
-
-/* Call a virtual function. Useful when the virtual function is not a
- * signal, otherwise you want to gtk_signal emit. Nice because it
- * documents what it's doing and there is less chance for a typo.
- */
-#define EEL_CALL_METHOD(class_cast_macro, object, signal, parameters) \
- \
-G_STMT_START { \
- if (class_cast_macro (G_OBJECT_GET_CLASS (object))->signal != NULL) { \
- (* class_cast_macro (G_OBJECT_GET_CLASS (object))->signal) \
- parameters; \
- } \
-} G_STMT_END
-
-/* Same thing, for functions with a return value. */
-#define EEL_CALL_METHOD_WITH_RETURN_VALUE(class_cast_macro, object, signal, \
- parameters) \
- \
-(class_cast_macro (G_OBJECT_GET_CLASS (object))->signal == NULL) \
- ? 0 \
- : ((* class_cast_macro (G_OBJECT_GET_CLASS (object))->signal) \
- parameters) \
-
-#ifndef G_DISABLE_ASSERT
-
-/* Define a signal that is not implemented by this class but must be
- * implemented by subclasses. This macro should be used inside the
- * class initialization function. The companion macro EEL_IMPLEMENT_MUST_OVERRIDE_SIGNAL
- * must be used earlier in the file. Called like this:
- *
- * EEL_ASSIGN_MUST_OVERRIDE_SIGNAL (klass,
- * fm_directory_view,
- * clear);
- */
-#define EEL_ASSIGN_MUST_OVERRIDE_SIGNAL(class_pointer, prefix, signal) \
- \
-* (void (**)(void)) & (class_pointer)->signal = prefix##_unimplemented_##signal
-
-/* Provide a debug-only implementation of a signal that must be implemented
- * by subclasses. The debug-only implementation fires a warning if it is called.
- * This macro should be placed as if it were a function, earlier in the file
- * than the class initialization function. Called like this:
- *
- * EEL_IMPLEMENT_MUST_OVERRIDE_SIGNAL (fm_directory_view, clear);
- */
-#define EEL_IMPLEMENT_MUST_OVERRIDE_SIGNAL(prefix, signal) \
- \
-static void \
-prefix##_unimplemented_##signal (void) \
-{ \
- g_warning ("failed to override signal " #prefix "->" #signal); \
-}
-
-#else /* G_DISABLE_ASSERT */
-
-#define EEL_DEFINE_MUST_OVERRIDE_SIGNAL(class_cast_macro, class_pointer, prefix, signal)
-#define EEL_IMPLEMENT_MUST_OVERRIDE_SIGNAL(prefix, signal)
-#define EEL_ASSIGN_MUST_OVERRIDE_SIGNAL(class_pointer, prefix, signal)
-
-#endif /* G_DISABLE_ASSERT */
-
-/* Access a method. */
-#define EEL_ACCESS_METHOD(class_cast_macro, object, method) \
-(class_cast_macro (G_OBJECT_GET_CLASS (object))->method)
-
-/* Invoke a method for a given object. */
-#define EEL_INVOKE_METHOD(class_cast_macro, object, method, parameters) \
-((* EEL_ACCESS_METHOD (class_cast_macro, object, method)) parameters)
-
-/* Assert the non-nullness of a method for a given object. */
-#define EEL_ASSERT_METHOD(class_cast_macro, object, method) \
-g_assert (EEL_ACCESS_METHOD (class_cast_macro, object, method) != NULL)
-
-/* Invoke a method if it ain't null. */
-#define EEL_INVOKE_METHOD_IF(class_cast_macro, object, method, parameters) \
-(EEL_ACCESS_METHOD (class_cast_macro, object, method) ? 0 : \
- EEL_INVOKE_METHOD (class_cast_macro, object, method, parameters))
-
-#endif /* EEL_GTK_MACROS_H */
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