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/*
* luaa.h - Lua configuration management header
*
* Copyright © 2008-2009 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_LUA_H
#define AWESOME_LUA_H
#include <ev.h>
#include <lua.h>
#include <lauxlib.h>
#include <basedir.h>
#include "draw.h"
#include "common/lualib.h"
#define luaA_deprecate(L, repl) \
do { \
luaA_warn(L, "%s: This function is deprecated and will be removed, see %s", \
__FUNCTION__, repl); \
lua_pushlstring(L, __FUNCTION__, sizeof(__FUNCTION__)); \
signal_object_emit(L, &global_signals, "debug::deprecation", 1); \
} while(0)
#define luaA_checkscreen(screen) \
do { \
if(screen < 0 || screen >= globalconf.screens.len) \
luaL_error(L, "invalid screen number: %d", screen + 1); \
} while(0)
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)
{
lua_getfield(L, idx, name);
if (lua_isnil(L, -1) || lua_isnumber(L, -1))
def = luaL_optnumber(L, -1, def);
lua_pop(L, 1);
return def;
}
static inline const char *
luaA_getopt_lstring(lua_State *L, int idx, const char *name, const char *def, size_t *len)
{
lua_getfield(L, idx, name);
const char *s = luaL_optlstring(L, -1, def, len);
lua_pop(L, 1);
return s;
}
static inline bool
luaA_getopt_boolean(lua_State *L, int idx, const char *name, bool def)
{
lua_getfield(L, idx, name);
bool b = luaA_optboolean(L, -1, def);
lua_pop(L, 1);
return b;
}
/** Push a area type to a table on stack.
* \param L The Lua VM state.
* \param geometry The area geometry to push.
* \return The number of elements pushed on stack.
*/
static inline int
luaA_pusharea(lua_State *L, area_t geometry)
{
lua_createtable(L, 0, 4);
lua_pushnumber(L, geometry.x);
lua_setfield(L, -2, "x");
lua_pushnumber(L, geometry.y);
lua_setfield(L, -2, "y");
lua_pushnumber(L, geometry.width);
lua_setfield(L, -2, "width");
lua_pushnumber(L, geometry.height);
lua_setfield(L, -2, "height");
return 1;
}
/** Register an Lua object.
* \param L The Lua stack.
* \param idx Index of the object in the stack.
* \param ref A int address: it will be filled with the int
* registered. If the address points to an already registered object, it will
* be unregistered.
* \return Always 0.
*/
static inline int
luaA_register(lua_State *L, int idx, int *ref)
{
lua_pushvalue(L, idx);
if(*ref != LUA_REFNIL)
luaL_unref(L, LUA_REGISTRYINDEX, *ref);
*ref = luaL_ref(L, LUA_REGISTRYINDEX);
return 0;
}
/** Unregister a Lua object.
* \param L The Lua stack.
* \param ref A reference to an Lua object.
*/
static inline void
luaA_unregister(lua_State *L, int *ref)
{
luaL_unref(L, LUA_REGISTRYINDEX, *ref);
*ref = LUA_REFNIL;
}
/** Register a function.
* \param L The Lua stack.
* \param idx Index of the function in the stack.
* \param fct A int address: it will be filled with the int
* registered. If the address points to an already registered function, it will
* be unregistered.
* \return luaA_register value.
*/
static inline int
luaA_registerfct(lua_State *L, int idx, int *fct)
{
luaA_checkfunction(L, idx);
return luaA_register(L, idx, fct);
}
/** Grab a function from the registry and execute it.
* \param L The Lua stack.
* \param ref The function reference.
* \param nargs The number of arguments for the Lua function.
* \param nret The number of returned value from the Lua function.
* \return True on no error, false otherwise.
*/
static inline bool
luaA_dofunction_from_registry(lua_State *L, int ref, int nargs, int nret)
{
lua_rawgeti(L, LUA_REGISTRYINDEX, ref);
return luaA_dofunction(L, nargs, nret);
}
/** Print a warning about some Lua code.
* This is less mean than luaL_error() which setjmp via lua_error() and kills
* everything. This only warn, it's up to you to then do what's should be done.
* \param L The Lua VM state.
* \param fmt The warning message.
*/
static inline void __attribute__ ((format(printf, 2, 3)))
luaA_warn(lua_State *L, const char *fmt, ...)
{
va_list ap;
luaL_where(L, 1);
fprintf(stderr, "%sW: ", lua_tostring(L, -1));
lua_pop(L, 1);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
void luaA_init(xdgHandle *);
bool luaA_parserc(xdgHandle *, const char *, bool);
bool luaA_hasitem(lua_State *, const void *);
void luaA_table2wtable(lua_State *);
bool luaA_isloop(lua_State *, int);
/** Global signals */
signal_array_t global_signals;
int luaA_class_index_miss_property(lua_State *, lua_object_t *);
int luaA_class_newindex_miss_property(lua_State *, lua_object_t *);
#endif
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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