413 lines
11 KiB
C
413 lines
11 KiB
C
/*
|
|
* 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 <stdio.h>
|
|
|
|
#include "draw.h"
|
|
#include "common/util.h"
|
|
|
|
/** Type for Lua function */
|
|
typedef int luaA_ref;
|
|
|
|
#define luaA_deprecate(L, repl) \
|
|
luaA_warn(L, "%s: This function is deprecated and will be removed, see %s", \
|
|
__FUNCTION__, repl)
|
|
|
|
#define DO_LUA_NEW(decl, type, prefix, lua_type, type_ref) \
|
|
decl int \
|
|
luaA_##prefix##_userdata_new(lua_State *L, type *p) \
|
|
{ \
|
|
type **pp = lua_newuserdata(L, sizeof(type *)); \
|
|
*pp = p; \
|
|
type_ref(pp); \
|
|
return luaA_settype(L, lua_type); \
|
|
} \
|
|
static int \
|
|
luaA_##prefix##_tostring(lua_State *L) \
|
|
{ \
|
|
type **p = luaA_checkudata(L, 1, lua_type); \
|
|
lua_pushfstring(L, lua_type ": %p", *p); \
|
|
return 1; \
|
|
}
|
|
|
|
#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(luaL_dostring(L, cmd)) \
|
|
warn("error executing Lua code: %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.nscreen) \
|
|
luaL_error(L, "invalid screen number: %d", screen + 1); \
|
|
} while(0)
|
|
|
|
/** Dump the Lua stack. Useful for debugging.
|
|
* \param L The Lua VM state.
|
|
*/
|
|
static inline void
|
|
luaA_dumpstack(lua_State *L)
|
|
{
|
|
fprintf(stderr, "-------- Lua stack dump ---------\n");
|
|
for(int i = lua_gettop(L); i; i--)
|
|
{
|
|
int t = lua_type(L, i);
|
|
switch (t)
|
|
{
|
|
case LUA_TSTRING:
|
|
fprintf(stderr, "%d: string: `%s'\n", i, lua_tostring(L, i));
|
|
break;
|
|
case LUA_TBOOLEAN:
|
|
fprintf(stderr, "%d: bool: %s\n", i, lua_toboolean(L, i) ? "true" : "false");
|
|
break;
|
|
case LUA_TNUMBER:
|
|
fprintf(stderr, "%d: number: %g\n", i, lua_tonumber(L, i));
|
|
break;
|
|
case LUA_TNIL:
|
|
fprintf(stderr, "%d: nil\n", i);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "%d: %s\t#%d\t%p\n", i, lua_typename(L, t),
|
|
(int) lua_objlen(L, i),
|
|
lua_topointer(L, i));
|
|
break;
|
|
}
|
|
}
|
|
fprintf(stderr, "------- Lua stack dump end ------\n");
|
|
}
|
|
|
|
/** 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;
|
|
}
|
|
|
|
/** Convert a object to a udata if possible.
|
|
* \param L The Lua VM state.
|
|
* \param ud The index.
|
|
* \param tname The type name.
|
|
* \return A pointer to the object, NULL otherwise.
|
|
*/
|
|
static inline void *
|
|
luaA_toudata(lua_State *L, int ud, const char *tname)
|
|
{
|
|
void **p = lua_touserdata(L, ud);
|
|
if(p && *p) /* value is a userdata? */
|
|
if(lua_getmetatable(L, ud)) /* does it have a metatable? */
|
|
{
|
|
lua_getfield(L, LUA_REGISTRYINDEX, tname); /* get correct metatable */
|
|
if(lua_rawequal(L, -1, -2)) /* does it have the correct mt? */
|
|
{
|
|
lua_pop(L, 2); /* remove both metatables */
|
|
return p;
|
|
}
|
|
lua_pop(L, 2); /* remove both metatables */
|
|
}
|
|
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)
|
|
{
|
|
lua_getfield(L, idx, name);
|
|
lua_Number n = luaL_optnumber(L, -1, def);
|
|
lua_pop(L, 1);
|
|
return n;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static inline int
|
|
luaA_settype(lua_State *L, const char *type)
|
|
{
|
|
luaL_getmetatable(L, type);
|
|
lua_setmetatable(L, -2);
|
|
return 1;
|
|
}
|
|
|
|
/** 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_newtable(L);
|
|
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;
|
|
}
|
|
|
|
static inline int
|
|
luaA_usemetatable(lua_State *L, int idxobj, int idxfield)
|
|
{
|
|
lua_getmetatable(L, idxobj);
|
|
lua_pushvalue(L, idxfield);
|
|
lua_rawget(L, -2);
|
|
if(!lua_isnil(L, -1))
|
|
{
|
|
lua_remove(L, -2);
|
|
return 1;
|
|
}
|
|
lua_pop(L, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Register an Lua object.
|
|
* \param L The Lua stack.
|
|
* \param idx Index of the object in the stack.
|
|
* \param ref A luaA_ref address: it will be filled with the luaA_ref
|
|
* registered. If the adresse point to an already registered object, it will
|
|
* be unregistered.
|
|
* \return Always 0.
|
|
*/
|
|
static inline int
|
|
luaA_register(lua_State *L, int idx, luaA_ref *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, luaA_ref *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 luaA_ref address: it will be filled with the luaA_ref
|
|
* registered. If the adresse point to an already registered function, it will
|
|
* be unregistered.
|
|
* \return luaA_register value.
|
|
*/
|
|
static inline int
|
|
luaA_registerfct(lua_State *L, int idx, luaA_ref *fct)
|
|
{
|
|
luaA_checkfunction(L, idx);
|
|
return luaA_register(L, idx, fct);
|
|
}
|
|
|
|
/** Execute an Lua function.
|
|
* \param L The Lua stack.
|
|
* \param f The Lua function to execute.
|
|
* \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(lua_State *L, luaA_ref f, int nargs, int nret)
|
|
{
|
|
lua_rawgeti(L, LUA_REGISTRYINDEX, f);
|
|
if(nargs)
|
|
lua_insert(L, - (nargs + 1));
|
|
if(lua_pcall(L, nargs, nret, 0))
|
|
{
|
|
warn("error running function: %s",
|
|
lua_tostring(L, -1));
|
|
lua_pop(L, 1);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/** 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");
|
|
}
|
|
|
|
/** Get an optional padding table from a Lua table.
|
|
* \param L The Lua VM state.
|
|
* \param idx The table index on the stack.
|
|
* \param dpadding The default padding value to use.
|
|
*/
|
|
static inline padding_t
|
|
luaA_getopt_padding(lua_State *L, int idx, padding_t *dpadding)
|
|
{
|
|
padding_t padding;
|
|
|
|
luaA_checktable(L, 2);
|
|
|
|
padding.right = luaA_getopt_number(L, 2, "right", dpadding->right);
|
|
padding.left = luaA_getopt_number(L, 2, "left", dpadding->left);
|
|
padding.top = luaA_getopt_number(L, 2, "top", dpadding->top);
|
|
padding.bottom = luaA_getopt_number(L, 2, "bottom", dpadding->bottom);
|
|
|
|
return padding;
|
|
}
|
|
|
|
|
|
/** Push a padding structure into a table on the Lua stack.
|
|
* \param L The Lua VM state.
|
|
* \param padding The padding struct pointer.
|
|
* \return The number of elements pushed on stack.
|
|
*/
|
|
static inline int
|
|
luaA_pushpadding(lua_State *L, padding_t *padding)
|
|
{
|
|
lua_newtable(L);
|
|
lua_pushnumber(L, padding->right);
|
|
lua_setfield(L, -2, "right");
|
|
lua_pushnumber(L, padding->left);
|
|
lua_setfield(L, -2, "left");
|
|
lua_pushnumber(L, padding->top);
|
|
lua_setfield(L, -2, "top");
|
|
lua_pushnumber(L, padding->bottom);
|
|
lua_setfield(L, -2, "bottom");
|
|
return 1;
|
|
}
|
|
|
|
void luaA_init(xdgHandle);
|
|
bool luaA_parserc(xdgHandle, const char *, bool);
|
|
void luaA_on_timer(EV_P_ ev_timer *, int);
|
|
int luaA_pushcolor(lua_State *, const xcolor_t *);
|
|
bool luaA_hasitem(lua_State *, const void *);
|
|
void luaA_table2wtable(lua_State *);
|
|
int luaA_next(lua_State *, int);
|
|
bool luaA_isloop(lua_State *, int);
|
|
|
|
#define hooks_property(c, prop) \
|
|
do { \
|
|
if(globalconf.hooks.property != LUA_REFNIL) \
|
|
{ \
|
|
luaA_client_userdata_new(globalconf.L, c); \
|
|
lua_pushliteral(globalconf.L, prop); \
|
|
luaA_dofunction(globalconf.L, globalconf.hooks.property, 2, 0); \
|
|
} \
|
|
} while(0);
|
|
|
|
#endif
|
|
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
|