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154 lines (131 loc) · 6.45 KB
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/*
* luaclass.h - useful functions for handling Lua classes
*
* Copyright © 2009 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef AWESOME_COMMON_LUACLASS
#define AWESOME_COMMON_LUACLASS
#include <lauxlib.h>
#include "common/signal.h"
#include "common/tokenize.h"
typedef struct lua_class_property lua_class_property_t;
ARRAY_TYPE(lua_class_property_t, lua_class_property)
#define LUA_OBJECT_HEADER \
signal_array_t signals;
/** Generic type for all objects.
* All Lua objects can be casted to this type.
*/
typedef struct
{
LUA_OBJECT_HEADER
} lua_object_t;
typedef void (*lua_class_initializer_t)(lua_State *, lua_object_t *);
typedef void (*lua_class_collector_t)(lua_object_t *);
typedef bool (*lua_class_checker_t)(lua_object_t *);
typedef struct lua_class_t lua_class_t;
#define LUA_CLASS_HEADER \
LUA_OBJECT_HEADER \
/** Class name */ \
const char *name; \
/** Parent class */ \
lua_class_t *parent; \
/** Size of objects */ \
size_t object_size; \
/** Initializer for new objects of that class */\
lua_class_initializer_t initializer; \
/** Garbage collection function */ \
lua_class_collector_t collector; \
/** Function to call to check if an object is valid */ \
lua_class_checker_t checker;
struct lua_class_t
{
LUA_CLASS_HEADER
};
/** The base class of all classes */
lua_class_t luaobject_class;
int luaA_settype(lua_State *, lua_class_t *);
const char * luaA_classname(lua_State *, int);
lua_class_t * luaA_class_get_from_stack(lua_State *, int);
lua_class_t * luaA_class_get(lua_State *, lua_object_t *);
void luaA_class_connect_signal(lua_State *, lua_class_t *, const char *, lua_CFunction);
void luaA_class_connect_signal_from_stack(lua_State *, lua_class_t *, const char *, int);
void luaA_class_disconnect_signal_from_stack(lua_State *, lua_class_t *, const char *, int);
int luaA_class_emit_signal(lua_State *, lua_class_t *, const char *, int)
__attribute__ ((warn_unused_result));
void luaA_class_setup(lua_State *, lua_class_t *, const char *, lua_class_t *, size_t,
lua_class_initializer_t, lua_class_collector_t,
lua_class_checker_t,
const struct luaL_reg[], const struct luaL_reg[], const struct luaL_reg[]);
lua_object_t * luaA_object_new(lua_State *, lua_class_t *);
int luaA_class_new(lua_State *, lua_class_t *);
void * luaA_checkudata(lua_State *, int, lua_class_t *);
void * luaA_toudata(lua_State *L, int ud, lua_class_t *);
static inline void *
luaA_checkudataornil(lua_State *L, int udx, lua_class_t *class)
{
if(lua_isnil(L, udx))
return NULL;
return luaA_checkudata(L, udx, class);
}
#define LUA_CLASS_FUNCS(prefix, lua_class) \
static inline int \
luaA_##prefix##_class_connect_signal(lua_State *L) \
{ \
if(luaA_toudata(L, 1, (lua_class))) \
luaA_object_connect_signal_from_stack(L, 1, \
luaL_checkstring(L, 2), 3); \
else \
luaA_class_connect_signal_from_stack(L, (lua_class), \
luaL_checkstring(L, 1), 2); \
return 0; \
} \
\
static inline int \
luaA_##prefix##_class_disconnect_signal(lua_State *L) \
{ \
if(luaA_toudata(L, 1, (lua_class))) \
luaA_object_disconnect_signal_from_stack(L, 1, \
luaL_checkstring(L, 2), \
3); \
else \
luaA_class_disconnect_signal_from_stack(L, (lua_class), \
luaL_checkstring(L, 1), 2);\
return 0; \
} \
\
static inline int \
luaA_##prefix##_class_emit_signal(lua_State *L) \
{ \
if(luaA_toudata(L, 1, (lua_class))) \
return luaA_object_emit_signal(L, 1, luaL_checkstring(L, 2), \
lua_gettop(L) - 1); \
return luaA_class_emit_signal(L, (lua_class), luaL_checkstring(L, 1), \
lua_gettop(L) - 1); \
}
#define LUA_CLASS_METHODS(class) \
{ "connect_signal", luaA_##class##_class_connect_signal }, \
{ "disconnect_signal", luaA_##class##_class_disconnect_signal }, \
{ "emit_signal", luaA_##class##_class_emit_signal },
#define LUA_CLASS_METHOD_BRIDGE(prefix, method, class, func) \
int \
luaA_##prefix##_##method(lua_State *L) \
{ \
func(L, luaA_checkudata(L, 1, class)); \
return 0; \
}
#endif
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80