5 * Darin Adler <darin@bentspoon.com>
7 * Copyright 2001 Ben Tea Spoons, Inc.
10 #define _EGG_MACROS_H_
12 #include <glib/gmacros.h>
16 /* Macros for defining classes. Ideas taken from Nautilus and GOB. */
18 /* Define the boilerplate type stuff to reduce typos and code size. Defines
19 * the get_type method and the parent_class static variable. */
21 #define EGG_BOILERPLATE(type, type_as_function, corba_type, \
22 parent_type, parent_type_macro, \
23 register_type_macro) \
24 static void type_as_function ## _class_init (type ## Class *klass); \
25 static void type_as_function ## _instance_init (type *object); \
26 static parent_type ## Class *parent_class = NULL; \
28 type_as_function ## _class_init_trampoline (gpointer klass, \
31 parent_class = (parent_type ## Class *)g_type_class_ref ( \
33 type_as_function ## _class_init ((type ## Class *)klass); \
36 type_as_function ## _get_type (void) \
38 static GType object_type = 0; \
39 if (object_type == 0) { \
40 static const GTypeInfo object_info = { \
41 sizeof (type ## Class), \
42 NULL, /* base_init */ \
43 NULL, /* base_finalize */ \
44 type_as_function ## _class_init_trampoline, \
45 NULL, /* class_finalize */ \
46 NULL, /* class_data */ \
48 0, /* n_preallocs */ \
49 (GInstanceInitFunc) type_as_function ## _instance_init \
51 object_type = register_type_macro \
52 (type, type_as_function, corba_type, \
53 parent_type, parent_type_macro); \
58 /* Just call the parent handler. This assumes that there is a variable
59 * named parent_class that points to the (duh!) parent class. Note that
60 * this macro is not to be used with things that return something, use
61 * the _WITH_DEFAULT version for that */
62 #define EGG_CALL_PARENT(parent_class_cast, name, args) \
63 ((parent_class_cast(parent_class)->name != NULL) ? \
64 parent_class_cast(parent_class)->name args : (void)0)
66 /* Same as above, but in case there is no implementation, it evaluates
68 #define EGG_CALL_PARENT_WITH_DEFAULT(parent_class_cast, \
69 name, args, def_return) \
70 ((parent_class_cast(parent_class)->name != NULL) ? \
71 parent_class_cast(parent_class)->name args : def_return)
73 /* Call a virtual method */
74 #define EGG_CALL_VIRTUAL(object, get_class_cast, method, args) \
75 (get_class_cast (object)->method ? (* get_class_cast (object)->method) args : (void)0)
77 /* Call a virtual method with default */
78 #define EGG_CALL_VIRTUAL_WITH_DEFAULT(object, get_class_cast, method, args, default) \
79 (get_class_cast (object)->method ? (* get_class_cast (object)->method) args : default)
81 #define EGG_CLASS_BOILERPLATE(type, type_as_function, \
82 parent_type, parent_type_macro) \
83 EGG_BOILERPLATE(type, type_as_function, type, \
84 parent_type, parent_type_macro, \
87 #define EGG_REGISTER_TYPE(type, type_as_function, corba_type, \
88 parent_type, parent_type_macro) \
89 g_type_register_static (parent_type_macro, #type, &object_info, 0)
92 #define EGG_DEFINE_BOXED_TYPE(TN, t_n) \
93 EGG_DEFINE_BOXED_TYPE_WITH_CODE(TN, t_n, {});
95 #define EGG_DEFINE_BOXED_TYPE_WITH_CODE(TN, t_n, _C_) \
97 static gpointer t_n##_copy (gpointer boxed); \
98 static void t_n##_free (gpointer boxed); \
100 EGG_DEFINE_BOXED_TYPE_EXTENDED(TN, t_n, t_n##_copy, t_n##_free, _C_);
102 #define EGG_DEFINE_BOXED_TYPE_EXTENDED(TN, t_n, b_c, b_f, _C_) \
104 _EGG_DEFINE_BOXED_TYPE_EXTENDED_BEGIN(TN, t_n, b_c, b_f) {_C_;} \
105 _EGG_DEFINE_BOXED_TYPE_EXTENDED_END()
107 #define _EGG_DEFINE_BOXED_TYPE_EXTENDED_BEGIN(TypeName, type_name, boxed_copy, boxed_free) \
110 type_name##_get_type (void) \
112 static volatile gsize g_define_type_id__volatile = 0; \
113 if (g_once_init_enter (&g_define_type_id__volatile)) \
115 GType g_define_type_id = \
116 g_boxed_type_register_static (g_intern_static_string (#TypeName), \
117 boxed_copy, boxed_free); \
118 { /* custom code follows */
119 #define _EGG_DEFINE_BOXED_TYPE_EXTENDED_END() \
120 /* following custom code */ \
122 g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
124 return g_define_type_id__volatile; \
125 } /* closes type_name##_get_type() */
127 #define EGG_DEFINE_QUARK(QN, q_n) \
132 static volatile gsize g_define_quark__volatile = 0; \
133 if (g_once_init_enter (&g_define_quark__volatile)) \
135 GQuark g_define_quark = g_quark_from_string (#QN); \
136 g_once_init_leave (&g_define_quark__volatile, g_define_quark); \
138 return g_define_quark__volatile; \
141 #define EGG_IS_POSITIVE_RESPONSE(response_id) \
142 ((response_id) == GTK_RESPONSE_ACCEPT || \
143 (response_id) == GTK_RESPONSE_OK || \
144 (response_id) == GTK_RESPONSE_YES || \
145 (response_id) == GTK_RESPONSE_APPLY)
147 #define EGG_IS_NEGATIVE_RESPONSE(response_id) \
148 ((response_id) == GTK_RESPONSE_REJECT || \
149 (response_id) == GTK_RESPONSE_CANCEL || \
150 (response_id) == GTK_RESPONSE_NO)
154 #endif /* _EGG_MACROS_H_ */