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+/**
+ * Useful macros.
+ *
+ * Author:
+ * Darin Adler <[email protected]>
+ *
+ * Copyright 2001 Ben Tea Spoons, Inc.
+ */
+#ifndef _EGG_MACROS_H_
+#define _EGG_MACROS_H_
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+/* Macros for defining classes. Ideas taken from Caja and GOB. */
+
+/* Define the boilerplate type stuff to reduce typos and code size. Defines
+ * the get_type method and the parent_class static variable. */
+
+#define EGG_BOILERPLATE(type, type_as_function, corba_type, \
+ parent_type, parent_type_macro, \
+ register_type_macro) \
+static void type_as_function ## _class_init (type ## Class *klass); \
+static void type_as_function ## _instance_init (type *object); \
+static parent_type ## Class *parent_class = NULL; \
+static void \
+type_as_function ## _class_init_trampoline (gpointer klass, \
+ gpointer data) \
+{ \
+ parent_class = (parent_type ## Class *)g_type_class_ref ( \
+ parent_type_macro); \
+ type_as_function ## _class_init ((type ## Class *)klass); \
+} \
+GType \
+type_as_function ## _get_type (void) \
+{ \
+ static GType object_type = 0; \
+ if (object_type == 0) { \
+ static const GTypeInfo object_info = { \
+ sizeof (type ## Class), \
+ NULL, /* base_init */ \
+ NULL, /* base_finalize */ \
+ type_as_function ## _class_init_trampoline, \
+ NULL, /* class_finalize */ \
+ NULL, /* class_data */ \
+ sizeof (type), \
+ 0, /* n_preallocs */ \
+ (GInstanceInitFunc) type_as_function ## _instance_init \
+ }; \
+ object_type = register_type_macro \
+ (type, type_as_function, corba_type, \
+ parent_type, parent_type_macro); \
+ } \
+ return object_type; \
+}
+
+/* Just call the parent handler. This assumes that there is a variable
+ * named parent_class that points to the (duh!) parent class. Note that
+ * this macro is not to be used with things that return something, use
+ * the _WITH_DEFAULT version for that */
+#define EGG_CALL_PARENT(parent_class_cast, name, args) \
+ ((parent_class_cast(parent_class)->name != NULL) ? \
+ parent_class_cast(parent_class)->name args : (void)0)
+
+/* Same as above, but in case there is no implementation, it evaluates
+ * to def_return */
+#define EGG_CALL_PARENT_WITH_DEFAULT(parent_class_cast, \
+ name, args, def_return) \
+ ((parent_class_cast(parent_class)->name != NULL) ? \
+ parent_class_cast(parent_class)->name args : def_return)
+
+/* Call a virtual method */
+#define EGG_CALL_VIRTUAL(object, get_class_cast, method, args) \
+ (get_class_cast (object)->method ? (* get_class_cast (object)->method) args : (void)0)
+
+/* Call a virtual method with default */
+#define EGG_CALL_VIRTUAL_WITH_DEFAULT(object, get_class_cast, method, args, default) \
+ (get_class_cast (object)->method ? (* get_class_cast (object)->method) args : default)
+
+#define EGG_CLASS_BOILERPLATE(type, type_as_function, \
+ parent_type, parent_type_macro) \
+ EGG_BOILERPLATE(type, type_as_function, type, \
+ parent_type, parent_type_macro, \
+ EGG_REGISTER_TYPE)
+
+#define EGG_REGISTER_TYPE(type, type_as_function, corba_type, \
+ parent_type, parent_type_macro) \
+ g_type_register_static (parent_type_macro, #type, &object_info, 0)
+
+
+#define EGG_DEFINE_BOXED_TYPE(TN, t_n) \
+EGG_DEFINE_BOXED_TYPE_WITH_CODE(TN, t_n, {});
+
+#define EGG_DEFINE_BOXED_TYPE_WITH_CODE(TN, t_n, _C_) \
+\
+static gpointer t_n##_copy (gpointer boxed); \
+static void t_n##_free (gpointer boxed); \
+\
+EGG_DEFINE_BOXED_TYPE_EXTENDED(TN, t_n, t_n##_copy, t_n##_free, _C_);
+
+#define EGG_DEFINE_BOXED_TYPE_EXTENDED(TN, t_n, b_c, b_f, _C_) \
+\
+_EGG_DEFINE_BOXED_TYPE_EXTENDED_BEGIN(TN, t_n, b_c, b_f) {_C_;} \
+_EGG_DEFINE_BOXED_TYPE_EXTENDED_END()
+
+#define _EGG_DEFINE_BOXED_TYPE_EXTENDED_BEGIN(TypeName, type_name, boxed_copy, boxed_free) \
+\
+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), \
+ boxed_copy, boxed_free); \
+ { /* custom code follows */
+#define _EGG_DEFINE_BOXED_TYPE_EXTENDED_END() \
+ /* following custom code */ \
+ } \
+ g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
+ } \
+ return g_define_type_id__volatile; \
+} /* closes type_name##_get_type() */
+
+#define EGG_DEFINE_QUARK(QN, q_n) \
+\
+GQuark \
+q_n##_quark (void) \
+{ \
+ static volatile gsize g_define_quark__volatile = 0; \
+ if (g_once_init_enter (&g_define_quark__volatile)) \
+ { \
+ GQuark g_define_quark = g_quark_from_string (#QN); \
+ g_once_init_leave (&g_define_quark__volatile, g_define_quark); \
+ } \
+ return g_define_quark__volatile; \
+}
+
+#define EGG_IS_POSITIVE_RESPONSE(response_id) \
+ ((response_id) == GTK_RESPONSE_ACCEPT || \
+ (response_id) == GTK_RESPONSE_OK || \
+ (response_id) == GTK_RESPONSE_YES || \
+ (response_id) == GTK_RESPONSE_APPLY)
+
+#define EGG_IS_NEGATIVE_RESPONSE(response_id) \
+ ((response_id) == GTK_RESPONSE_REJECT || \
+ (response_id) == GTK_RESPONSE_CANCEL || \
+ (response_id) == GTK_RESPONSE_NO)
+
+G_END_DECLS
+
+#endif /* _EGG_MACROS_H_ */