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Copy pathluaclass.h
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170 lines (146 loc) · 7.4 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef AWESOME_COMMON_LUACLASS
#define AWESOME_COMMON_LUACLASS
#include "common/signal.h"
#include <lua.h>
#include <lauxlib.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 lua_object_t *(*lua_class_allocator_t)(lua_State *);
typedef void (*lua_class_collector_t)(lua_object_t *);
typedef int (*lua_class_propfunc_t)(lua_State *, lua_object_t *);
typedef bool (*lua_class_checker_t)(lua_object_t *);
typedef struct lua_class_t lua_class_t;
struct lua_class_t
{
/** Class name */
const char *name;
/** Class signals */
signal_array_t signals;
/** Parent class */
lua_class_t *parent;
/** Allocator for creating new objects of that class */
lua_class_allocator_t allocator;
/** Garbage collection function */
lua_class_collector_t collector;
/** Class properties */
lua_class_property_array_t properties;
/** Function to call when a indexing an unknown property */
lua_class_propfunc_t index_miss_property;
/** Function to call when a indexing an unknown property */
lua_class_propfunc_t newindex_miss_property;
/** Function to call to check if an object is valid */
lua_class_checker_t checker;
/** Number of instances of this class in lua */
unsigned int instances;
/** Class tostring method */
lua_class_propfunc_t tostring;
};
const char * luaA_typename(lua_State *, int);
lua_class_t * luaA_class_get(lua_State *, int);
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);
void luaA_class_emit_signal(lua_State *, lua_class_t *, const char *, int);
void luaA_openlib(lua_State *, const char *, const struct luaL_Reg[], const struct luaL_Reg[]);
void luaA_class_setup(lua_State *, lua_class_t *, const char *, lua_class_t *,
lua_class_allocator_t, lua_class_collector_t,
lua_class_checker_t,
lua_class_propfunc_t, lua_class_propfunc_t,
const struct luaL_Reg[], const struct luaL_Reg[]);
void luaA_class_add_property(lua_class_t *, const char *,
lua_class_propfunc_t, lua_class_propfunc_t, lua_class_propfunc_t);
int luaA_usemetatable(lua_State *, int, int);
int luaA_class_index(lua_State *);
int luaA_class_newindex(lua_State *);
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_class_set_tostring(lua_class_t *class, lua_class_propfunc_t callback)
{
class->tostring = callback;
}
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_add_signal(lua_State *L) \
{ \
signal_add(&(lua_class).signals, luaL_checkstring(L, 1)); \
return 0; \
} \
\
static inline int \
luaA_##prefix##_class_connect_signal(lua_State *L) \
{ \
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) \
{ \
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) \
{ \
luaA_class_emit_signal(L, &(lua_class), luaL_checkstring(L, 1), \
lua_gettop(L) - 1); \
return 0; \
} \
\
static inline int \
luaA_##prefix##_class_instances(lua_State *L) \
{ \
lua_pushnumber(L, (lua_class).instances); \
return 1; \
}
#define LUA_CLASS_METHODS(class) \
{ "add_signal", luaA_##class##_class_add_signal }, \
{ "connect_signal", luaA_##class##_class_connect_signal }, \
{ "disconnect_signal", luaA_##class##_class_disconnect_signal }, \
{ "emit_signal", luaA_##class##_class_emit_signal }, \
{ "instances", luaA_##class##_class_instances }, \
#define LUA_CLASS_META \
{ "__index", luaA_class_index }, \
{ "__newindex", luaA_class_newindex },
#endif
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80