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Diffstat (limited to 'src/egg-macros.h')
| -rw-r--r-- | src/egg-macros.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/egg-macros.h b/src/egg-macros.h new file mode 100644 index 0000000..6e56e2e --- /dev/null +++ b/src/egg-macros.h @@ -0,0 +1,154 @@ +/** + * 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_ */ |