1 /* Lua scripting support
3 * Copyright (c) 2008 Sadrul Habib Chowdhury (sadrul@users.sf.net)
5 * Sadrul Habib Chowdhury (sadrul@users.sf.net)
6 * Rui Guo (firemeteor.guo@gmail.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3, or (at your option)
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program (see the file COPYING); if not, write to the
20 * Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
23 ****************************************************************
25 #include <sys/types.h>
42 static int StackDump(lua_State
*L
, const char *message
)
44 FILE *f
= fopen("/tmp/debug/stack", "ab");
45 int i
= lua_gettop(L
);
47 fprintf(f
, "%s", message
);
50 int t
= lua_type(L
, i
);
54 fprintf(f
, "String: %s\n", lua_tostring(L
, i
));
58 fprintf(f
, "Boolean: %s\n", lua_toboolean(L
, i
) ? "true" : "false");
62 fprintf(f
, "Number: %g\n", lua_tonumber(L
, i
));
66 fprintf(f
, "Type: %s\n", lua_typename(L
, t
));
76 extern struct win
*windows
, *fore
;
77 extern struct display
*displays
, *display
;
78 extern struct LayFuncs WinLf
;
79 extern struct layer
*flayer
;
80 extern void AppendWinMsgRend(const char *str
, const char *color
);
82 static int LuaDispatch(void *handler
, const char *params
, va_list va
);
83 static int LuaRegEvent(lua_State
*L
);
84 static void LuaShowErr(lua_State
*L
);
85 struct binding lua_binding
;
89 LUA_HANDLER_TYPE_N
= 1,
103 typedef struct lua_handler
*lua_handler
;
104 void LuaPushHandler(lua_State
*L
, lua_handler lh
);
105 void LuaHRef(lua_State
*L
, int key
, int reg
);
106 lua_handler
LuaCheckHandler(lua_State
*L
, int idx
, int ref
);
109 LuaAllocHandler(const char *name
, int ref
)
111 struct lua_handler
*lh
;
112 lh
= (struct lua_handler
*) malloc(sizeof(struct lua_handler
));
118 lh
->type
= LUA_HANDLER_TYPE_N
;
123 lh
->type
= LUA_HANDLER_TYPE_F
;
124 lh
->u
.reference
= ref
;
131 LuaFreeHandler(lua_State
*L
, struct lua_handler
**lh
)
133 if ((*lh
)->type
== LUA_HANDLER_TYPE_N
)
137 LuaHRef(L
, (*lh
)->u
.reference
, 0);
138 (*lh
)->u
.reference
= 0;
144 #define CHECK_TYPE(name, type) \
146 check_##name(lua_State *L, int index) \
149 luaL_checktype(L, index, LUA_TUSERDATA); \
150 var = (type **) luaL_checkudata(L, index, #name); \
152 luaL_typerror(L, index, #name); \
156 #define PUSH_TYPE(name, type) \
158 push_##name(lua_State *L, type **t) \
165 r = (type **)lua_newuserdata(L, sizeof(type *)); \
167 luaL_getmetatable(L, #name); \
168 lua_setmetatable(L,-2); \
172 /* Much of the following template comes from:
173 * http://lua-users.org/wiki/BindingWithMembersAndMethods
176 static int get_int (lua_State
*L
, void *v
)
178 lua_pushinteger (L
, *(int*)v
);
182 static int set_int (lua_State
*L
, void *v
)
184 *(int*)v
= luaL_checkint(L
, 3);
188 static int get_number (lua_State
*L
, void *v
)
190 lua_pushnumber(L
, *(lua_Number
*)v
);
194 static int set_number (lua_State
*L
, void *v
)
196 *(lua_Number
*)v
= luaL_checknumber(L
, 3);
200 static int get_string (lua_State
*L
, void *v
)
202 lua_pushstring(L
, (char*)v
);
206 static int set_string (lua_State
*L
, void *v
)
208 *(const char**)v
= luaL_checkstring(L
, 3);
212 typedef int (*Xet_func
) (lua_State
*L
, void *v
);
214 /* member info for get and set handlers */
217 const char *name
; /* member name */
218 Xet_func func
; /* get or set function for type of member */
219 size_t offset
; /* offset of member within the struct */
220 int (*absolute
)(lua_State
*);
223 static void Xet_add (lua_State
*L
, const struct Xet_reg
*l
)
229 lua_pushstring(L
, l
->name
);
230 lua_pushlightuserdata(L
, (void*)l
);
235 static int Xet_call (lua_State
*L
)
237 /* for get: stack has userdata, index, lightuserdata */
238 /* for set: stack has userdata, index, value, lightuserdata */
239 const struct Xet_reg
*m
= (const struct Xet_reg
*)lua_touserdata(L
, -1); /* member info */
240 lua_pop(L
, 1); /* drop lightuserdata */
241 luaL_checktype(L
, 1, LUA_TUSERDATA
);
243 return m
->absolute(L
);
244 return m
->func(L
, *(char**)lua_touserdata(L
, 1) + m
->offset
);
247 static int index_handler (lua_State
*L
)
249 /* stack has userdata, index */
250 lua_pushvalue(L
, 2); /* dup index */
251 lua_rawget(L
, lua_upvalueindex(1)); /* lookup member by name */
252 if (!lua_islightuserdata(L
, -1))
254 lua_pop(L
, 1); /* drop value */
255 lua_pushvalue(L
, 2); /* dup index */
256 lua_gettable(L
, lua_upvalueindex(2)); /* else try methods */
257 if (lua_isnil(L
, -1)) /* invalid member */
258 luaL_error(L
, "cannot get member '%s'", lua_tostring(L
, 2));
261 return Xet_call(L
); /* call get function */
264 static int newindex_handler (lua_State
*L
)
266 /* stack has userdata, index, value */
267 lua_pushvalue(L
, 2); /* dup index */
268 lua_rawget(L
, lua_upvalueindex(1)); /* lookup member by name */
269 if (!lua_islightuserdata(L
, -1)) /* invalid member */
270 luaL_error(L
, "cannot set member '%s'", lua_tostring(L
, 2));
271 return Xet_call(L
); /* call set function */
275 struct_register(lua_State
*L
, const char *name
, const luaL_reg fn_methods
[], const luaL_reg meta_methods
[],
276 const struct Xet_reg setters
[], const struct Xet_reg getters
[])
278 int metatable
, methods
;
280 /* create methods table & add it to the table of globals */
281 luaL_register(L
, name
, fn_methods
);
282 methods
= lua_gettop(L
);
284 /* create metatable & add it to the registry */
285 luaL_newmetatable(L
, name
);
286 luaL_register(L
, 0, meta_methods
); /* fill metatable */
288 /* To identify the type of object */
289 lua_pushstring(L
, "_objname");
290 lua_pushstring(L
, name
);
293 metatable
= lua_gettop(L
);
295 lua_pushliteral(L
, "__metatable");
296 lua_pushvalue(L
, methods
); /* dup methods table*/
297 lua_rawset(L
, metatable
); /* hide metatable:
298 metatable.__metatable = methods */
300 lua_pushliteral(L
, "__index");
301 lua_pushvalue(L
, metatable
); /* upvalue index 1 */
302 Xet_add(L
, getters
); /* fill metatable with getters */
303 lua_pushvalue(L
, methods
); /* upvalue index 2 */
304 lua_pushcclosure(L
, index_handler
, 2);
305 lua_rawset(L
, metatable
); /* metatable.__index = index_handler */
307 lua_pushliteral(L
, "__newindex");
308 lua_newtable(L
); /* table for members you can set */
309 Xet_add(L
, setters
); /* fill with setters */
310 lua_pushcclosure(L
, newindex_handler
, 1);
311 lua_rawset(L
, metatable
); /* metatable.__newindex = newindex_handler */
313 /* FIXME: Why do we leave an element on the stack? */
314 lua_pop(L
, 1); /* drop metatable */
315 return 1; /* return methods on the stack */
321 PUSH_TYPE(callback
, struct listener
)
323 CHECK_TYPE(callback
, struct listener
)
326 callback_unhook(lua_State
*L
)
328 /*Emulate check_callback() */
329 struct listener
**ppl
;
330 luaL_checktype(L
, 1, LUA_TUSERDATA
);
331 ppl
= (struct listener
**) luaL_checkudata(L
, 1, "callback");
334 luaL_typerror(L
, 1, "callback");
338 lua_pushboolean(L
, 0);
339 lua_pushstring(L
, "Callback already unhooked.");
344 LuaFreeHandler(L
, (lua_handler
*)&(*ppl
)->handler
);
345 unregister_listener(*ppl
);
347 lua_pushboolean(L
, 1);
352 static const luaL_reg callback_methods
[] = {
353 {"unhook", callback_unhook
},
357 static const luaL_reg callback_metamethods
[] = {
361 static const struct Xet_reg callback_setters
[] = {
365 static const struct Xet_reg callback_getters
[] = {
374 PUSH_TYPE(window
, struct win
)
376 CHECK_TYPE(window
, struct win
)
378 static int get_window(lua_State
*L
, void *v
)
380 push_window(L
, (struct win
**)v
);
385 window_change_title(lua_State
*L
)
387 struct win
*w
= check_window(L
, 1);
389 const char *title
= luaL_checklstring(L
, 2, &len
);
390 ChangeAKA(w
, (char *)title
, len
);
395 window_get_monitor_status(lua_State
*L
)
397 struct win
*w
= check_window(L
, 1);
398 int activity
= luaL_checkint(L
, 2);
401 lua_pushinteger(L
, w
->w_monitor
!= MON_OFF
);
404 lua_pushinteger(L
, w
->w_silence
== SILENCE_ON
? w
->w_silencewait
: 0);
409 static const luaL_reg window_methods
[] = {
410 {"get_monitor_status", window_get_monitor_status
},
411 {"hook", LuaRegEvent
},
416 window_tostring(lua_State
*L
)
419 struct win
*w
= check_window(L
, 1);
420 snprintf(str
, sizeof(str
), "{window #%d: '%s'}", w
->w_number
, w
->w_title
);
421 lua_pushstring(L
, str
);
426 window_equality(lua_State
*L
)
428 struct win
*w1
= check_window(L
, 1), *w2
= check_window(L
, 2);
429 lua_pushboolean(L
, (w1
== w2
|| (w1
&& w2
&& w1
->w_number
== w2
->w_number
)));
433 static const luaL_reg window_metamethods
[] = {
434 {"__tostring", window_tostring
},
435 {"__eq", window_equality
},
439 static const struct Xet_reg window_setters
[] = {
440 {"title", 0, 0, window_change_title
/*absolute setter*/},
444 static const struct Xet_reg window_getters
[] = {
445 {"title", get_string
, offsetof(struct win
, w_title
) + 8},
446 {"number", get_int
, offsetof(struct win
, w_number
)},
447 {"dir", get_string
, offsetof(struct win
, w_dir
)},
448 {"tty", get_string
, offsetof(struct win
, w_tty
)},
449 {"pid", get_int
, offsetof(struct win
, w_pid
)},
450 {"group", get_window
, offsetof(struct win
, w_group
)},
451 {"bell", get_int
, offsetof(struct win
, w_bell
)},
460 PUSH_TYPE(user
, struct acluser
)
462 CHECK_TYPE(user
, struct acluser
)
465 get_user(lua_State
*L
, void *v
)
467 push_user(L
, (struct acluser
**)v
);
471 static const luaL_reg user_methods
[] = {
476 user_tostring(lua_State
*L
)
479 struct acluser
*u
= check_user(L
, 1);
480 snprintf(str
, sizeof(str
), "{user '%s'}", u
->u_name
);
481 lua_pushstring(L
, str
);
485 static const luaL_reg user_metamethods
[] = {
486 {"__tostring", user_tostring
},
490 static const struct Xet_reg user_setters
[] = {
494 static const struct Xet_reg user_getters
[] = {
495 {"name", get_string
, offsetof(struct acluser
, u_name
)},
496 {"password", get_string
, offsetof(struct acluser
, u_password
)},
504 PUSH_TYPE(canvas
, struct canvas
)
506 CHECK_TYPE(canvas
, struct canvas
)
509 get_canvas(lua_State
*L
, void *v
)
511 push_canvas(L
, (struct canvas
**)v
);
516 canvas_select(lua_State
*L
)
518 struct canvas
*c
= check_canvas(L
, 1);
519 if (!display
|| D_forecv
== c
)
521 SetCanvasWindow(c
, Layer2Window(c
->c_layer
));
524 /* XXX: the following all is duplicated from process.c:DoAction.
525 * Should these be in some better place?
527 ResizeCanvas(&D_canvas
);
528 RecreateCanvasChain();
529 RethinkDisplayViewports();
530 ResizeLayersToCanvases(); /* redisplays */
531 fore
= D_fore
= Layer2Window(D_forecv
->c_layer
);
532 flayer
= D_forecv
->c_layer
;
534 if (D_xtermosc
[2] || D_xtermosc
[3])
544 flayer
= D_forecv
->c_layer
;
545 CV_CALL(D_forecv
, LayRestore();LaySetCursor());
546 WindowChanged(0, 'F');
550 static const luaL_reg canvas_methods
[] = {
551 {"select", canvas_select
},
555 static const luaL_reg canvas_metamethods
[] = {
559 static const struct Xet_reg canvas_setters
[] = {
564 canvas_get_window(lua_State
*L
)
566 struct canvas
*c
= check_canvas(L
, 1);
567 struct win
*win
= Layer2Window(c
->c_layer
);
569 push_window(L
, &win
);
575 static const struct Xet_reg canvas_getters
[] = {
576 {"next", get_canvas
, offsetof(struct canvas
, c_next
)},
577 {"xoff", get_int
, offsetof(struct canvas
, c_xoff
)},
578 {"yoff", get_int
, offsetof(struct canvas
, c_yoff
)},
579 {"xs", get_int
, offsetof(struct canvas
, c_xs
)},
580 {"ys", get_int
, offsetof(struct canvas
, c_ys
)},
581 {"xe", get_int
, offsetof(struct canvas
, c_xe
)},
582 {"ye", get_int
, offsetof(struct canvas
, c_ye
)},
583 {"window", 0, 0, canvas_get_window
},
591 PUSH_TYPE(layout
, struct layout
)
592 CHECK_TYPE(layout
, struct layout
)
594 static const struct Xet_reg layout_getters
[] = {
599 get_layout(lua_State
*L
, void *v
)
601 push_layout(L
, (struct layout
**)v
);
609 PUSH_TYPE(display
, struct display
)
611 CHECK_TYPE(display
, struct display
)
614 display_get_canvases(lua_State
*L
)
620 d
= check_display(L
, 1);
622 for (iter
= d
->d_cvlist
, count
= 0; iter
; iter
= iter
->c_next
, count
++) {
623 lua_pushinteger(L
, count
);
624 push_canvas(L
, &iter
);
631 static const luaL_reg display_methods
[] = {
632 {"get_canvases", display_get_canvases
},
637 display_tostring(lua_State
*L
)
640 struct display
*d
= check_display(L
, 1);
641 snprintf(str
, sizeof(str
), "{display: tty = '%s', term = '%s'}", d
->d_usertty
, d
->d_termname
);
642 lua_pushstring(L
, str
);
646 static const luaL_reg display_metamethods
[] = {
647 {"__tostring", display_tostring
},
651 static const struct Xet_reg display_setters
[] = {
655 static const struct Xet_reg display_getters
[] = {
656 {"tty", get_string
, offsetof(struct display
, d_usertty
)},
657 {"term", get_string
, offsetof(struct display
, d_termname
)},
658 {"fore", get_window
, offsetof(struct display
, d_fore
)},
659 {"other", get_window
, offsetof(struct display
, d_other
)},
660 {"width", get_int
, offsetof(struct display
, d_width
)},
661 {"height", get_int
, offsetof(struct display
, d_height
)},
662 {"user", get_user
, offsetof(struct display
, d_user
)},
663 {"layout", get_layout
, offsetof(struct display
, d_layout
)},
672 screen_get_windows(lua_State
*L
)
678 for (iter
= windows
, count
= 0; iter
; iter
= iter
->w_next
, count
++) {
679 lua_pushinteger(L
, iter
->w_number
);
680 push_window(L
, &iter
);
688 screen_get_displays(lua_State
*L
)
690 struct display
*iter
;
694 for (iter
= displays
, count
= 0; iter
; iter
= iter
->d_next
, count
++) {
695 lua_pushinteger(L
, count
);
696 push_display(L
, &iter
);
704 screen_get_display(lua_State
*L
)
706 push_display(L
, &display
);
711 screen_exec_command(lua_State
*L
)
716 command
= luaL_checklstring(L
, 1, &len
);
718 RcLine((char *)command
, len
);
724 screen_append_msg(lua_State
*L
)
726 const char *msg
, *color
;
728 msg
= luaL_checklstring(L
, 1, &len
);
732 color
= luaL_checklstring(L
, 2, &len
);
733 AppendWinMsgRend(msg
, color
);
744 script_input_fn(char *buf
, int len
, char *priv
)
746 struct sinput_data
*sidata
= (struct sinput_data
*)priv
;
747 lua_handler lh
= sidata
->lh
;
748 lua_State
*L
= sidata
->L
;
750 LuaPushHandler(L
, lh
);
751 lua_pushstring(L
, buf
);
752 if (lua_pcall(L
, 1, 0, 0) == LUA_ERRRUN
)
754 if(lua_isstring(L
, -1))
760 LuaFreeHandler(L
, &lh
);
764 screen_input(lua_State
*L
)
766 char * prompt
= NULL
;
768 struct sinput_data
*sidata
;
770 prompt
= (char *)luaL_checkstring(L
, 1);
771 lh
= LuaCheckHandler(L
, 2, 1);
772 sidata
= (struct sinput_data
*)malloc(sizeof(struct sinput_data
));
774 luaL_error(L
, "Out of Memory");
778 Input(prompt
, 100, INP_COOKED
, script_input_fn
, (char *)sidata
, 0);
783 static const luaL_reg screen_methods
[] = {
784 {"windows", screen_get_windows
},
785 {"displays", screen_get_displays
},
786 {"display", screen_get_display
},
787 {"command", screen_exec_command
},
788 {"append_msg", screen_append_msg
},
789 {"hook", LuaRegEvent
},
790 {"input", screen_input
},
794 static const luaL_reg screen_metamethods
[] = {
798 static const struct Xet_reg screen_setters
[] = {
802 static const struct Xet_reg screen_getters
[] = {
808 /** Public functions {{{ */
810 /* FIXME: Think about this: will it affect the registered handlers?*/
818 #define REGISTER(X) struct_register(L, #X , X ## _methods, X##_metamethods, X##_setters, X##_getters)
827 /* To store handler funcs */
828 luaL_getmetatable(L
, "screen");
829 /* two kinds of info in this table:
830 * _funckey[func]->key
831 * _funckey[key]->refcnt */
832 lua_pushstring(L
, "_funckey");
835 /* two kinds of info in this table:
836 * _keyfunc[key]->func */
837 lua_pushstring(L
, "_keyfunc");
845 /* An error message on top of the stack. */
847 LuaShowErr(lua_State
*L
)
849 struct display
*d
= display
;
851 const char *message
= luaL_checklstring(L
, -1, &len
);
852 LMsg(0, "%s", message
? message
: "Unknown error");
859 void (*push_fn
)(lua_State
*, void*);
864 LuaCallProcess(const char *name
, struct fn_def defs
[])
868 lua_getfield(L
, LUA_GLOBALSINDEX
, name
);
869 if (lua_isnil(L
, -1))
874 for (argc
= 0; defs
[argc
].push_fn
; argc
++)
875 defs
[argc
].push_fn(L
, defs
[argc
].value
);
876 if (lua_pcall(L
, argc
, 0, 0) == LUA_ERRRUN
&& lua_isstring(L
, -1))
884 int LuaSource(const char *file
, int async
)
889 if (stat(file
, &st
) == -1)
890 Msg(errno
, "Error loading lua script file '%s'", file
);
893 int len
= strlen(file
);
894 if (len
< 4 || strncmp(file
+ len
- 4, ".lua", 4) != 0)
896 if (luaL_dofile(L
, file
) && lua_isstring(L
, -1))
916 LuaProcessCaption(const char *caption
, struct win
*win
, int len
)
920 struct fn_def params
[] = {
921 {lua_pushstring
, caption
},
923 {lua_pushinteger
, len
},
926 return LuaCallProcess("process_caption", params
);
930 push_stringarray(lua_State
*L
, char **args
)
934 for (i
= 1; args
&& *args
; i
++) {
935 lua_pushinteger(L
, i
);
936 lua_pushstring(L
, *args
++);
942 LuaPushParams(lua_State
*L
, const char *params
, va_list va
)
950 lua_pushstring(L
, va_arg(va
, char *));
953 push_stringarray(L
, va_arg(va
, char **));
956 lua_pushinteger(L
, va_arg(va
, int));
960 struct display
*d
= va_arg(va
, struct display
*);
971 int LuaCall(const char *func
, const char **argv
)
977 StackDump(L
, "Before LuaCall\n");
978 lua_getfield(L
, LUA_GLOBALSINDEX
, func
);
979 if (lua_isnil(L
, -1))
982 lua_pushstring(L
, "Could not find the script function\n");
986 for (argc
= 0; *argv
; argv
++, argc
++)
988 lua_pushstring(L
, *argv
);
990 if (lua_pcall(L
, argc
, 0, 0) == LUA_ERRRUN
)
992 if(lua_isstring(L
, -1))
994 StackDump(L
, "After LuaCall\n");
1002 /*** Lua callback handler management {{{ */
1005 LuaPushHTable(lua_State
*L
, int screen
, const char * t
)
1007 lua_pushstring(L
, t
);
1008 lua_rawget(L
, screen
);
1009 /* FIXME: Do we need to balance the stack here? */
1010 if (lua_isnil(L
, -1))
1011 luaL_error(L
, "Fatal! Fail to get function registeration table!");
1012 return lua_gettop(L
);
1016 LuaPushHandler(lua_State
*L
, lua_handler lh
)
1019 if (lh
->type
== LUA_HANDLER_TYPE_F
)
1021 luaL_getmetatable(L
, "screen");
1022 keyfunc
= LuaPushHTable(L
, lua_gettop(L
), "_keyfunc");
1023 lua_rawgeti(L
, keyfunc
, lh
->u
.reference
);
1029 lua_getfield(L
, LUA_GLOBALSINDEX
, lh
->u
.name
);
1034 LuaHRef(lua_State
*L
, int key
, int reg
)
1036 int funckey
, keyfunc
, cnt
, sc
, idx
;
1037 luaL_getmetatable(L
, "screen");
1039 funckey
= LuaPushHTable(L
, sc
, "_funckey");
1040 keyfunc
= LuaPushHTable(L
, sc
, "_keyfunc");
1042 lua_rawgeti(L
, keyfunc
, key
);
1043 idx
= lua_gettop(L
);
1045 lua_rawgeti(L
, funckey
, key
);
1046 cnt
= lua_tointeger(L
, -1);/*cnt = htable[key]*/
1047 if (!reg
&& cnt
<= 1)
1049 /*release the last reference*/
1050 luaL_unref(L
, funckey
, key
);
1051 lua_pushvalue(L
, idx
);
1053 lua_settable(L
, funckey
); /*htable[func]=key*/
1057 lua_pushinteger(L
, key
);
1058 lua_pushinteger(L
, reg
? cnt
+ 1 : cnt
- 1);
1059 lua_settable(L
, funckey
); /*htable[key] = cnt + 1*/
1064 /* Ref when asked to. Never unref*/
1066 LuaFuncKey(lua_State
*L
, int idx
, int ref
)
1068 int key
, funckey
, sc
;
1069 luaL_getmetatable(L
, "screen");
1071 funckey
= LuaPushHTable(L
, sc
, "_funckey");
1073 lua_pushvalue(L
, idx
);
1074 lua_gettable(L
, funckey
);/*funckey[func] ==?*/
1075 if (lua_isnil(L
, -1))
1077 /* Not found, alloc a new key */
1081 /*funckey[key] = 1*/
1082 lua_pushinteger(L
, 1);
1083 key
= luaL_ref(L
, funckey
);
1085 /*funckey[func]=key*/
1086 lua_pushvalue(L
, idx
);
1087 lua_pushinteger(L
, key
);
1088 lua_settable(L
, funckey
);
1090 int keyfunc
= LuaPushHTable(L
, sc
, "_keyfunc");
1091 /*keyfunc[key] = func*/
1092 lua_pushinteger(L
, key
);
1093 lua_pushvalue(L
, idx
);
1094 lua_settable(L
, keyfunc
);
1100 key
= lua_tointeger(L
, -1);/*key = funckey[func]*/
1110 LuaCheckHandler(lua_State
*L
, int idx
, int ref
)
1113 if (lua_isstring(L
, idx
))
1115 const char * handler
;
1116 /* registered with func name.*/
1117 handler
= luaL_checkstring(L
, idx
);
1118 lua_getfield(L
, LUA_GLOBALSINDEX
, handler
);
1119 if (!lua_isfunction(L
, -1))
1120 luaL_error(L
, "The specified handler %s in param #%d is not a function", handler
, idx
);
1122 return LuaAllocHandler(handler
, 0);
1124 else if (!lua_isfunction(L
, idx
))
1125 luaL_error(L
, "Handler should be a function or the name of function");
1127 key
= LuaFuncKey(L
, idx
, ref
);
1128 return LuaAllocHandler(NULL
, key
);
1134 LuaDispatch(void *handler
, const char *params
, va_list va
)
1136 lua_handler lh
= (lua_handler
)handler
;
1139 StackDump(L
, "before dispatch");
1141 LuaPushHandler(L
, lh
);
1142 if (lua_isnil(L
, -1))
1147 argc
= LuaPushParams(L
, params
, va
);
1149 if (lua_pcall(L
, argc
, 1, 0) == LUA_ERRRUN
&& lua_isstring(L
, -1))
1151 StackDump(L
, "After LuaDispatch\n");
1155 retvalue
= lua_tonumber(L
, -1);
1160 int LuaForeWindowChanged(void)
1162 struct fn_def params
[] = {
1163 {push_display
, &display
},
1164 {push_window
, display
? &D_fore
: &fore
},
1169 return LuaCallProcess("fore_changed", params
);
1172 #define SEVNAME_MAX 30
1174 LuaRegEvent(lua_State
*L
)
1176 /* signature: hook(obj, event, handler, priv);
1177 * or: hook(event, handler, priv)
1178 * returns: A ticket for later unregister. */
1179 int idx
= 1, argc
= lua_gettop(L
);
1180 unsigned int priv
= 31; /* Default privilege */
1184 const char *objname
= "global";
1186 static char evbuf
[SEVNAME_MAX
];
1189 struct script_event
*sev
;
1191 StackDump(L
, "Before RegEvent\n");
1193 /* Identify the object, if specified */
1194 if (luaL_getmetafield(L
, 1, "_objname"))
1196 objname
= luaL_checkstring(L
, -1);
1198 if (!strcmp("screen", objname
))
1201 obj
= *(char **)lua_touserdata(L
, 1);
1205 event
= luaL_checkstring(L
, idx
++);
1206 snprintf(evbuf
, SEVNAME_MAX
, "%s_%s", objname
, event
);
1208 /* Check and get the handler */
1209 lh
= LuaCheckHandler(L
, idx
++, 1);
1211 luaL_error(L
, "Out of memory");
1213 StackDump(L
, "In RegEvent\n");
1216 priv
= luaL_checkinteger(L
, idx
);
1218 sev
= object_get_event(obj
, evbuf
);
1222 l
= (struct listener
*)malloc(sizeof(struct listener
));
1224 return luaL_error(L
, "Out of memory");
1226 l
->bd
= &lua_binding
;
1227 l
->handler
= (void *)lh
;
1228 register_listener(sev
, l
);
1229 /* Return the ticket for un-register */
1230 push_callback(L
, &l
);
1233 return luaL_error(L
, "Invalid event specified: %s for object %s", event
, objname
);
1235 StackDump(L
, "After RegEvent\n");
1241 struct ScriptFuncs LuaFuncs
=
1243 LuaForeWindowChanged
,
1247 struct binding lua_binding
=