awesome/lua.h

178 lines
4.6 KiB
C

/*
* lua.h - Lua configuration management header
*
* Copyright © 2008 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_LUA_H
#define AWESOME_LUA_H
#include <lua.h>
#include <lauxlib.h>
#include "common/util.h"
/** Object types */
typedef enum
{
AWESOME_TYPE_STATUSBAR = 1,
AWESOME_TYPE_TITLEBAR
} awesome_type_t;
/** Type for Lua function */
typedef int luaA_function;
#define DO_LUA_GC(type, prefix, lua_type, type_unref) \
static int \
luaA_##prefix##_gc(lua_State *L) \
{ \
type **p = luaA_checkudata(L, 1, lua_type); \
type_unref(p); \
*p = NULL; \
return 0; \
}
#define DO_LUA_EQ(type, prefix, lua_type) \
static int \
luaA_##prefix##_eq(lua_State *L) \
{ \
type **p1 = luaA_checkudata(L, 1, lua_type); \
type **p2 = luaA_checkudata(L, 2, lua_type); \
lua_pushboolean(L, (*p1 == *p2)); \
return 1; \
}
#define luaA_dostring(L, cmd) \
do { \
if(cmd) \
if(luaL_dostring(L, cmd)) \
warn("error executing Lua code: %s", \
lua_tostring(L, -1)); \
} while(0)
#define luaA_dofunction(L, f, n) \
do { \
if(f) \
{ \
lua_rawgeti(L, LUA_REGISTRYINDEX, f); \
if(n) \
lua_insert(L, - (n + 1)); \
if(lua_pcall(L, n, 0, 0)) \
warn("error running function: %s", \
lua_tostring(L, -1)); \
} \
} while(0)
#define luaA_checktable(L, n) \
do { \
if(!lua_istable(L, n)) \
luaL_typerror(L, n, "table"); \
} while(0)
#define luaA_checkfunction(L, n) \
do { \
if(!lua_isfunction(L, n)) \
luaL_typerror(L, n, "function"); \
} while(0)
#define luaA_checkscreen(screen) \
do { \
if(screen < 0 || screen >= globalconf.screens_info->nscreen) \
luaL_error(L, "invalid screen number: %d\n", screen); \
} while(0)
/** Check that an object is not a NULL reference.
* \param L The Lua state.
* \param ud The index of the object in the stack.
* \param tname The type name.
* \return A pointer to the object.
*/
static inline void *
luaA_checkudata(lua_State *L, int ud, const char *tname)
{
void **p = luaL_checkudata(L, ud, tname);
if(*p)
return p;
luaL_error(L, "invalid object");
return NULL;
}
static inline bool
luaA_checkboolean(lua_State *L, int n)
{
if(!lua_isboolean(L, n))
luaL_typerror(L, n, "boolean");
return lua_toboolean(L, n);
}
static inline bool
luaA_optboolean(lua_State *L, int idx, bool def)
{
return luaL_opt(L, luaA_checkboolean, idx, def);
}
static inline lua_Number
luaA_getopt_number(lua_State *L, int idx, const char *name, lua_Number def)
{
/* assume that table is first on stack */
lua_getfield(L, idx, name);
/* return luaL_optnumber result */
return luaL_optnumber(L, -1, def);
}
static inline const char *
luaA_getopt_string(lua_State *L, int idx, const char *name, const char *def)
{
/* assume that table is first on stack */
lua_getfield(L, idx, name);
/* return luaL_optnumber result */
return luaL_optstring(L, -1, def);
}
static inline bool
luaA_getopt_boolean(lua_State *L, int idx, const char *name, bool def)
{
/* assume that table is first on stack */
lua_getfield(L, idx, name);
/* return luaL_optnumber result */
return luaA_optboolean(L, -1, def);
}
static inline int
luaA_settype(lua_State *L, const char *type)
{
luaL_getmetatable(L, type);
lua_setmetatable(L, -2);
return 1;
}
static inline char *
luaA_name_init(lua_State *L)
{
lua_getfield(L, 1, "name");
return a_strdup(luaL_checkstring(L, -1));
}
void luaA_init(void);
bool luaA_parserc(const char *);
void luaA_docmd(char *);
void luaA_pushpointer(void *, awesome_type_t);
#endif
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