152 lines
6.5 KiB
C
152 lines
6.5 KiB
C
/*
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* luaclass.h - useful functions for handling Lua classes
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*
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* Copyright © 2009 Julien Danjou <julien@danjou.info>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef AWESOME_COMMON_LUACLASS
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#define AWESOME_COMMON_LUACLASS
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#include "common/signal.h"
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#include "common/tokenize.h"
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typedef struct lua_class_property lua_class_property_t;
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ARRAY_TYPE(lua_class_property_t, lua_class_property)
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#define LUA_OBJECT_HEADER \
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signal_array_t signals;
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/** Generic type for all objects.
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* All Lua objects can be casted to this type.
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*/
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typedef struct
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{
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LUA_OBJECT_HEADER
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} lua_object_t;
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typedef lua_object_t *(*lua_class_allocator_t)(lua_State *);
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typedef void (*lua_class_collector_t)(lua_object_t *);
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typedef int (*lua_class_propfunc_t)(lua_State *, lua_object_t *);
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typedef bool (*lua_class_checker_t)(lua_object_t *);
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typedef struct lua_class_t lua_class_t;
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struct lua_class_t
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{
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/** Class name */
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const char *name;
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/** Class signals */
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signal_array_t signals;
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/** Parent class */
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lua_class_t *parent;
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/** Allocator for creating new objects of that class */
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lua_class_allocator_t allocator;
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/** Garbage collection function */
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lua_class_collector_t collector;
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/** Class properties */
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lua_class_property_array_t properties;
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/** Function to call when a indexing an unknown property */
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lua_class_propfunc_t index_miss_property;
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/** Function to call when a indexing an unknown property */
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lua_class_propfunc_t newindex_miss_property;
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/** Function to call to check if an object is valid */
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lua_class_checker_t checker;
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};
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const char * luaA_typename(lua_State *, int);
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lua_class_t * luaA_class_get(lua_State *, int);
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void luaA_class_connect_signal(lua_State *, lua_class_t *, const char *, lua_CFunction);
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void luaA_class_connect_signal_from_stack(lua_State *, lua_class_t *, const char *, int);
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void luaA_class_disconnect_signal_from_stack(lua_State *, lua_class_t *, const char *, int);
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void luaA_class_emit_signal(lua_State *, lua_class_t *, const char *, int);
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void luaA_openlib(lua_State *, const char *, const struct luaL_reg[], const struct luaL_reg[]);
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void luaA_class_setup(lua_State *, lua_class_t *, const char *, lua_class_t *,
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lua_class_allocator_t, lua_class_collector_t,
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lua_class_checker_t,
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lua_class_propfunc_t, lua_class_propfunc_t,
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const struct luaL_reg[], const struct luaL_reg[]);
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void luaA_class_add_property(lua_class_t *, const char *,
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lua_class_propfunc_t, lua_class_propfunc_t, lua_class_propfunc_t);
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int luaA_usemetatable(lua_State *, int, int);
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int luaA_class_index(lua_State *);
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int luaA_class_newindex(lua_State *);
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int luaA_class_new(lua_State *, lua_class_t *);
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void * luaA_checkudata(lua_State *, int, lua_class_t *);
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void * luaA_toudata(lua_State *L, int ud, lua_class_t *);
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static inline void *
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luaA_checkudataornil(lua_State *L, int udx, lua_class_t *class)
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{
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if(lua_isnil(L, udx))
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return NULL;
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return luaA_checkudata(L, udx, class);
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}
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#define LUA_CLASS_FUNCS(prefix, lua_class) \
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static inline int \
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luaA_##prefix##_class_add_signal(lua_State *L) \
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{ \
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signal_add(&(lua_class).signals, luaL_checkstring(L, 1)); \
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return 0; \
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} \
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\
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static inline int \
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luaA_##prefix##_class_connect_signal(lua_State *L) \
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{ \
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luaA_class_connect_signal_from_stack(L, &(lua_class), \
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luaL_checkstring(L, 1), 2); \
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return 0; \
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} \
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\
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static inline int \
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luaA_##prefix##_class_disconnect_signal(lua_State *L) \
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{ \
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luaA_class_disconnect_signal_from_stack(L, &(lua_class), \
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luaL_checkstring(L, 1), 2); \
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return 0; \
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} \
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\
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static inline int \
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luaA_##prefix##_class_emit_signal(lua_State *L) \
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{ \
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luaA_class_emit_signal(L, &(lua_class), luaL_checkstring(L, 1), \
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lua_gettop(L) - 1); \
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return 0; \
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}
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#define LUA_CLASS_METHODS(class) \
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{ "add_signal", luaA_##class##_class_add_signal }, \
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{ "connect_signal", luaA_##class##_class_connect_signal }, \
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{ "disconnect_signal", luaA_##class##_class_disconnect_signal }, \
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{ "emit_signal", luaA_##class##_class_emit_signal },
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#define LUA_CLASS_META \
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{ "__index", luaA_class_index }, \
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{ "__newindex", luaA_class_newindex },
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#endif
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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