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
);
81 extern void FocusCanvas(struct canvas
*cv
);
83 static int LuaDispatch(void *handler
, const char *params
, va_list va
);
84 static int LuaRegEvent(lua_State
*L
);
85 static void LuaShowErr(lua_State
*L
);
86 struct binding lua_binding
;
90 LUA_HANDLER_TYPE_N
= 1,
104 typedef struct lua_handler
*lua_handler
;
105 void LuaPushHandler(lua_State
*L
, lua_handler lh
);
106 void LuaHUnRef(lua_State
*L
, int key
);
107 lua_handler
LuaCheckHandler(lua_State
*L
, int idx
, int ref
);
110 LuaAllocHandler(const char *name
, int ref
)
112 struct lua_handler
*lh
;
113 lh
= (struct lua_handler
*) malloc(sizeof(struct lua_handler
));
119 lh
->type
= LUA_HANDLER_TYPE_N
;
120 lh
->u
.name
= SaveStr(name
);
124 lh
->type
= LUA_HANDLER_TYPE_F
;
125 lh
->u
.reference
= ref
;
132 LuaFreeHandler(lua_State
*L
, struct lua_handler
**lh
)
134 if ((*lh
)->type
== LUA_HANDLER_TYPE_N
)
138 LuaHUnRef(L
, (*lh
)->u
.reference
);
139 (*lh
)->u
.reference
= 0;
145 #define CHECK_TYPE(name, type) \
147 check_##name(lua_State *L, int index) \
149 struct broker **broker; \
151 luaL_checktype(L, index, LUA_TUSERDATA); \
152 broker = (struct broker **) luaL_checkudata(L, index, #name); \
154 var = (type *)get_broker_obj(broker); \
156 if (!broker || !*broker) \
157 luaL_typerror(L, index, #name); \
161 #define PUSH_TYPE(name, type) \
163 push_##name(lua_State *L, type **t) \
170 r = (struct broker **)lua_newuserdata(L, sizeof(struct broker *)); \
171 *r = get_obj_broker(*t); \
172 luaL_getmetatable(L, #name); \
173 lua_setmetatable(L,-2); \
177 /* Much of the following template comes from:
178 * http://lua-users.org/wiki/BindingWithMembersAndMethods
181 static int get_int (lua_State
*L
, void *v
)
183 lua_pushinteger (L
, *(int*)v
);
187 static int set_int (lua_State
*L
, void *v
)
189 *(int*)v
= luaL_checkint(L
, 3);
193 static int get_number (lua_State
*L
, void *v
)
195 lua_pushnumber(L
, *(lua_Number
*)v
);
199 static int set_number (lua_State
*L
, void *v
)
201 *(lua_Number
*)v
= luaL_checknumber(L
, 3);
205 static int get_string (lua_State
*L
, void *v
)
207 lua_pushstring(L
, (char*)v
);
211 static int set_string (lua_State
*L
, void *v
)
213 *(const char**)v
= luaL_checkstring(L
, 3);
217 typedef int (*Xet_func
) (lua_State
*L
, void *v
);
219 /* member info for get and set handlers */
222 const char *name
; /* member name */
223 Xet_func func
; /* get or set function for type of member */
224 size_t offset
; /* offset of member within the struct */
225 int (*absolute
)(lua_State
*);
228 static void Xet_add (lua_State
*L
, const struct Xet_reg
*l
)
234 lua_pushstring(L
, l
->name
);
235 lua_pushlightuserdata(L
, (void*)l
);
240 static int Xet_call (lua_State
*L
)
242 /* for get: stack has userdata, index, lightuserdata */
243 /* for set: stack has userdata, index, value, lightuserdata */
244 const struct Xet_reg
*m
= (const struct Xet_reg
*)lua_touserdata(L
, -1); /* member info */
246 lua_pop(L
, 1); /* drop lightuserdata */
247 luaL_checktype(L
, 1, LUA_TUSERDATA
);
249 return m
->absolute(L
);
250 obj
= get_broker_obj((struct broker
**)lua_touserdata(L
, 1));
251 return m
->func(L
, (char *)obj
+ m
->offset
);
254 static int index_handler (lua_State
*L
)
256 /* stack has userdata, index */
257 lua_pushvalue(L
, 2); /* dup index */
258 lua_rawget(L
, lua_upvalueindex(1)); /* lookup member by name */
259 if (!lua_islightuserdata(L
, -1))
261 lua_pop(L
, 1); /* drop value */
262 lua_pushvalue(L
, 2); /* dup index */
263 lua_gettable(L
, lua_upvalueindex(2)); /* else try methods */
264 if (lua_isnil(L
, -1)) /* invalid member */
265 luaL_error(L
, "cannot get member '%s'", lua_tostring(L
, 2));
268 return Xet_call(L
); /* call get function */
271 static int newindex_handler (lua_State
*L
)
273 /* stack has userdata, index, value */
274 lua_pushvalue(L
, 2); /* dup index */
275 lua_rawget(L
, lua_upvalueindex(1)); /* lookup member by name */
276 if (!lua_islightuserdata(L
, -1)) /* invalid member */
277 luaL_error(L
, "cannot set member '%s'", lua_tostring(L
, 2));
278 return Xet_call(L
); /* call set function */
282 struct_register(lua_State
*L
, const char *name
, const luaL_reg fn_methods
[], const luaL_reg meta_methods
[],
283 const struct Xet_reg setters
[], const struct Xet_reg getters
[])
285 int metatable
, methods
;
287 /* create methods table & add it to the table of globals */
288 luaL_register(L
, name
, fn_methods
);
289 methods
= lua_gettop(L
);
291 /* create metatable & add it to the registry */
292 luaL_newmetatable(L
, name
);
293 luaL_register(L
, 0, meta_methods
); /* fill metatable */
295 /* To identify the type of object */
296 lua_pushstring(L
, "_objname");
297 lua_pushstring(L
, name
);
300 metatable
= lua_gettop(L
);
302 lua_pushliteral(L
, "__metatable");
303 lua_pushvalue(L
, methods
); /* dup methods table*/
304 lua_rawset(L
, metatable
); /* hide metatable:
305 metatable.__metatable = methods */
307 lua_pushliteral(L
, "__index");
308 lua_pushvalue(L
, metatable
); /* upvalue index 1 */
309 Xet_add(L
, getters
); /* fill metatable with getters */
310 lua_pushvalue(L
, methods
); /* upvalue index 2 */
311 lua_pushcclosure(L
, index_handler
, 2);
312 lua_rawset(L
, metatable
); /* metatable.__index = index_handler */
314 lua_pushliteral(L
, "__newindex");
315 lua_newtable(L
); /* table for members you can set */
316 Xet_add(L
, setters
); /* fill with setters */
317 lua_pushcclosure(L
, newindex_handler
, 1);
318 lua_rawset(L
, metatable
); /* metatable.__newindex = newindex_handler */
320 /* FIXME: Why do we leave an element on the stack? */
321 lua_pop(L
, 1); /* drop metatable */
322 return 1; /* return methods on the stack */
329 push_callback(lua_State
*L
, struct listener
**t
)
336 r
= (struct listener
**)lua_newuserdata(L
, sizeof(struct listener
*));
338 luaL_getmetatable(L
, "callback");
339 lua_setmetatable(L
,-2);
345 internal_unhook(lua_State
*L
, int warn
)
347 /*Emulate check_callback() */
348 struct listener
**ppl
;
349 luaL_checktype(L
, 1, LUA_TUSERDATA
);
350 ppl
= (struct listener
**) luaL_checkudata(L
, 1, "callback");
353 luaL_typerror(L
, 1, "callback");
359 lua_pushboolean(L
, 0);
360 lua_pushstring(L
, "Callback already unhooked.");
366 LuaFreeHandler(L
, (lua_handler
*)&(*ppl
)->handler
);
367 unregister_listener(*ppl
);
370 lua_pushboolean(L
, 1);
375 callback_unhook(lua_State
*L
)
377 return internal_unhook(L
, 1);
380 static const luaL_reg callback_methods
[] = {
381 {"unhook", callback_unhook
},
386 callback_collect(lua_State
*L
)
388 return internal_unhook(L
, 0);
391 static const luaL_reg callback_metamethods
[] = {
392 {"__gc", callback_collect
},
396 static const struct Xet_reg callback_setters
[] = {
400 static const struct Xet_reg callback_getters
[] = {
408 screen_object_collect(lua_State
*L
)
410 struct broker
**pbroker
;
411 luaL_checktype(L
, 1, LUA_TUSERDATA
);
412 pbroker
= (struct broker
**)lua_touserdata(L
, 1);
413 broker_unref(pbroker
);
419 PUSH_TYPE(window
, struct win
)
421 CHECK_TYPE(window
, struct win
)
423 static int get_window(lua_State
*L
, void *v
)
425 push_window(L
, (struct win
**)v
);
430 window_change_title(lua_State
*L
)
432 struct win
*w
= check_window(L
, 1);
434 const char *title
= luaL_checklstring(L
, 3, &len
);
435 ChangeAKA(w
, (char *)title
, len
);
440 window_change_number(lua_State
*L
)
442 struct win
*w
= check_window(L
, 1);
443 int newnum
= luaL_checkint(L
, 3);
444 ChangeWinNum(w
->w_number
, newnum
);
449 window_get_monitor_status(lua_State
*L
)
451 struct win
*w
= check_window(L
, 1);
452 int activity
= luaL_checkint(L
, 2);
455 lua_pushinteger(L
, w
->w_monitor
!= MON_OFF
);
458 lua_pushinteger(L
, w
->w_silence
== SILENCE_ON
? w
->w_silencewait
: 0);
464 window_stuff(lua_State
*L
)
467 struct layer
*oldflayer
= flayer
;
468 struct win
*w
= check_window(L
, 1);
469 const char *str
= luaL_checklstring(L
, 2, &len
);
471 flayer
= &w
->w_layer
;
473 LayProcess((char **)&str
, (int *) &len
);
479 window_activate(lua_State
*L
)
481 struct win
*w
= check_window(L
, 1);
486 static void push_canvas(lua_State
*L
, struct canvas
**t
);
489 window_get_showing_canvases(lua_State
*L
)
491 struct win
*w
= check_window(L
, 1);
493 struct canvas
*cv
= w
->w_layer
.l_cvlist
;
500 lua_pushinteger(L
, count
++);
510 window_getlines(lua_State
*L
)
512 struct win
*w
= check_window(L
, 1);
515 for (i
= 0; i
< fore
->w_height
; i
++)
517 char *p
= (char *)w
->w_mlines
[i
].image
;
519 for (k
= fore
->w_width
- 1; k
>= 0 && p
[k
] == ' '; k
--)
524 lua_pushinteger(L
, i
);
525 lua_pushstring(L
, p
);
534 window_gethistory(lua_State
*L
)
536 struct win
*w
= check_window(L
, 1);
539 for (i
= 0; i
< fore
->w_height
; i
++)
541 char *p
= (char *) w
->w_hlines
[(w
->w_histidx
+ i
) % w
->w_histheight
].image
;
543 for (k
= fore
->w_width
- 1; k
>= 0 && p
[k
] == ' '; k
--)
548 lua_pushinteger(L
, i
);
549 lua_pushstring(L
, p
);
557 static const luaL_reg window_methods
[] = {
558 {"get_monitor_status", window_get_monitor_status
},
559 {"showing_canvases", window_get_showing_canvases
},
560 {"stuff", window_stuff
},
561 {"activate", window_activate
},
562 {"get_lines", window_getlines
},
563 {"get_history", window_gethistory
},
564 {"hook", LuaRegEvent
},
569 window_tostring(lua_State
*L
)
572 struct win
*w
= check_window(L
, 1);
573 snprintf(str
, sizeof(str
), "{window #%d: '%s'}", w
->w_number
, w
->w_title
);
574 lua_pushstring(L
, str
);
579 window_equality(lua_State
*L
)
581 struct win
*w1
= check_window(L
, 1), *w2
= check_window(L
, 2);
582 lua_pushboolean(L
, (w1
== w2
|| (w1
&& w2
&& w1
->w_number
== w2
->w_number
)));
586 static const luaL_reg window_metamethods
[] = {
587 {"__tostring", window_tostring
},
588 {"__eq", window_equality
},
589 {"__gc", screen_object_collect
},
593 static const struct Xet_reg window_setters
[] = {
594 {"title", 0, 0, window_change_title
/*absolute setter*/},
595 {"number", 0, 0, window_change_number
/*absolute setter*/},
599 static const struct Xet_reg window_getters
[] = {
600 {"title", get_string
, offsetof(struct win
, w_title
) + 8},
601 {"number", get_int
, offsetof(struct win
, w_number
)},
602 {"dir", get_string
, offsetof(struct win
, w_dir
)},
603 {"tty", get_string
, offsetof(struct win
, w_tty
)},
604 {"pid", get_int
, offsetof(struct win
, w_pid
)},
605 {"group", get_window
, offsetof(struct win
, w_group
)},
606 {"bell", get_int
, offsetof(struct win
, w_bell
)},
615 PUSH_TYPE(user
, struct acluser
)
617 CHECK_TYPE(user
, struct acluser
)
620 get_user(lua_State
*L
, void *v
)
622 push_user(L
, (struct acluser
**)v
);
626 static const luaL_reg user_methods
[] = {
631 user_tostring(lua_State
*L
)
634 struct acluser
*u
= check_user(L
, 1);
635 snprintf(str
, sizeof(str
), "{user '%s'}", u
->u_name
);
636 lua_pushstring(L
, str
);
640 static const luaL_reg user_metamethods
[] = {
641 {"__tostring", user_tostring
},
642 {"__gc", screen_object_collect
},
646 static const struct Xet_reg user_setters
[] = {
650 static const struct Xet_reg user_getters
[] = {
651 {"name", get_string
, offsetof(struct acluser
, u_name
)},
652 {"password", get_string
, offsetof(struct acluser
, u_password
)},
658 static int get_display(lua_State
*L
, void *v
);
661 PUSH_TYPE(canvas
, struct canvas
)
663 CHECK_TYPE(canvas
, struct canvas
)
666 get_canvas(lua_State
*L
, void *v
)
668 push_canvas(L
, (struct canvas
**)v
);
673 canvas_select(lua_State
*L
)
675 struct canvas
*c
= check_canvas(L
, 1);
676 if (!display
|| D_forecv
== c
)
678 /* FIXME: why do we need this? */
679 SetCanvasWindow(c
, Layer2Window(c
->c_layer
));
686 canvas_split(lua_State
*L
)
688 struct canvas
*c
= check_canvas(L
, 1);
689 struct canvas
*oldfore
= D_forecv
;
691 int hori
= lua_toboolean(L
, 2);
693 AddCanvas(SLICE_HORI
);
695 AddCanvas(SLICE_VERT
);
702 canvas_showwin(lua_State
*L
)
704 struct canvas
*c
= check_canvas(L
, 1);
706 SetCanvasWindow(c
, 0);
709 struct win
*w
= check_window(L
, 2);
710 SetCanvasWindow(c
, w
);
715 static const luaL_reg canvas_methods
[] = {
716 {"select", canvas_select
},
717 {"split", canvas_split
},
718 {"showwin", canvas_showwin
},
722 static const luaL_reg canvas_metamethods
[] = {
723 {"__gc", screen_object_collect
},
727 extern struct mchar mchar_so
;
729 canvas_update_caption(lua_State
*L
)
731 struct canvas
*cv
= check_canvas(L
, 1);
733 const char *caption
= luaL_checklstring(L
, 3, &len
);
735 padlen
= cv
->c_xe
- cv
->c_xs
+
736 (display
? (cv
->c_xe
+ 1 < D_width
|| D_CLP
): 0);
737 struct win
*w
= Layer2Window(cv
->c_layer
);
738 char * buf
= MakeWinMsgEv((char *)caption
, w
, '%', padlen
, &cv
->c_captev
, 0);
739 if (cv
->c_captev
.timeout
.tv_sec
)
740 evenq(&cv
->c_captev
);
743 GotoPos(cv
->c_xs
, cv
->c_ye
+1);
744 /*XXX:what does this mean?*/
745 SetRendition(&mchar_so
);
746 if (l
> cv
->c_xe
- cv
->c_xs
+ 1)
747 l
= cv
->c_xe
- cv
->c_xs
+ 1;
748 PutWinMsg(buf
, cv
->c_xs
, l
);
750 for (; l
<= cv
->c_xe
; l
++)
756 static const struct Xet_reg canvas_setters
[] = {
757 {"caption", 0, 0, canvas_update_caption
/*absolute setter*/},
762 canvas_get_window(lua_State
*L
)
764 struct canvas
*c
= check_canvas(L
, 1);
765 struct win
*win
= Layer2Window(c
->c_layer
);
767 push_window(L
, &win
);
773 static const struct Xet_reg canvas_getters
[] = {
774 {"next", get_canvas
, offsetof(struct canvas
, c_next
)},
775 {"xoff", get_int
, offsetof(struct canvas
, c_xoff
)},
776 {"yoff", get_int
, offsetof(struct canvas
, c_yoff
)},
777 {"xs", get_int
, offsetof(struct canvas
, c_xs
)},
778 {"ys", get_int
, offsetof(struct canvas
, c_ys
)},
779 {"xe", get_int
, offsetof(struct canvas
, c_xe
)},
780 {"ye", get_int
, offsetof(struct canvas
, c_ye
)},
781 {"window", 0, 0, canvas_get_window
},
782 {"display", get_display
, offsetof(struct canvas
, c_display
)},
790 PUSH_TYPE(layout
, struct layout
)
791 CHECK_TYPE(layout
, struct layout
)
793 static const struct Xet_reg layout_getters
[] = {
794 {"title", get_string
, offsetof(struct layout
, lay_title
)},
795 {"number", get_string
, offsetof(struct layout
, lay_title
)},
796 {"autosave", get_string
, offsetof(struct layout
, lay_autosave
)},
801 layout_change_title(lua_State
*L
)
803 struct layout
*lay
= check_layout(L
, 1);
805 const char *title
= luaL_checklstring(L
, 3, &len
);
806 free(lay
->lay_title
);
807 lay
->lay_title
= SaveStr(title
);
811 void LayoutChangeNumber(struct layout
*lay
, int newnum
);
814 layout_change_number(lua_State
*L
)
816 struct layout
*lay
= check_layout(L
, 1);
817 int newnum
= luaL_checkint(L
, 3);
818 LayoutChangeNumber(lay
, newnum
);
822 static const struct Xet_reg layout_setters
[] = {
823 {"title", 0, 0, layout_change_title
/*absolute setter*/},
824 {"number", 0, 0, layout_change_number
/*absolute setter*/},
825 {"autosave", get_string
, offsetof(struct layout
, lay_autosave
)},
830 layout_select(lua_State
*L
)
832 struct layout
*lay
= check_layout(L
, 1);
833 if (!display
) return 0;
834 LoadLayout(lay
, &D_canvas
);
839 static const luaL_reg layout_methods
[] = {
840 {"select", layout_select
},
844 static const luaL_reg layout_metamethods
[] = {
845 {"__gc", screen_object_collect
},
850 get_layout(lua_State
*L
, void *v
)
852 push_layout(L
, (struct layout
**)v
);
860 PUSH_TYPE(display
, struct display
)
862 CHECK_TYPE(display
, struct display
)
865 get_display(lua_State
*L
, void *v
)
867 push_display(L
, (struct display
**)v
);
872 display_get_canvases(lua_State
*L
)
878 d
= check_display(L
, 1);
880 for (iter
= d
->d_cvlist
, count
= 0; iter
; iter
= iter
->c_next
, count
++) {
881 lua_pushinteger(L
, count
);
882 push_canvas(L
, &iter
);
890 display_top_canvas(lua_State
*L
)
893 d
= check_display(L
, 1);
894 push_canvas(L
, &d
->d_cvlist
);
900 display_bot_canvas(lua_State
*L
)
904 d
= check_display(L
, 1);
906 for (c
= d
->d_cvlist
; c
->c_next
; c
= c
->c_next
)
913 static const luaL_reg display_methods
[] = {
914 {"get_canvases", display_get_canvases
},
915 {"top_canvas", display_top_canvas
},
916 {"bottom_canvas", display_bot_canvas
},
921 display_tostring(lua_State
*L
)
924 struct display
*d
= check_display(L
, 1);
925 snprintf(str
, sizeof(str
), "{display: tty = '%s', term = '%s'}", d
->d_usertty
, d
->d_termname
);
926 lua_pushstring(L
, str
);
930 static const luaL_reg display_metamethods
[] = {
931 {"__tostring", display_tostring
},
932 {"__gc", screen_object_collect
},
937 display_new_idle_timeout(lua_State
*L
)
939 struct display
*disp
= check_display(L
, 1);
940 int timeout
= luaL_checkinteger(L
, 3) * 1000;
941 struct event
*ev
= &disp
->d_idleev
;
944 SetTimeout(ev
, timeout
);
954 static const struct Xet_reg display_setters
[] = {
955 {"idle_timeout", 0, 0, display_new_idle_timeout
/*absolute setter*/},
959 static const struct Xet_reg display_getters
[] = {
960 {"tty", get_string
, offsetof(struct display
, d_usertty
)},
961 {"term", get_string
, offsetof(struct display
, d_termname
)},
962 {"fore", get_window
, offsetof(struct display
, d_fore
)},
963 {"other", get_window
, offsetof(struct display
, d_other
)},
964 {"width", get_int
, offsetof(struct display
, d_width
)},
965 {"height", get_int
, offsetof(struct display
, d_height
)},
966 {"user", get_user
, offsetof(struct display
, d_user
)},
967 {"layout", get_layout
, offsetof(struct display
, d_layout
)},
976 screen_get_windows(lua_State
*L
)
982 for (iter
= windows
, count
= 0; iter
; iter
= iter
->w_next
, count
++) {
983 lua_pushinteger(L
, iter
->w_number
);
984 push_window(L
, &iter
);
992 screen_get_displays(lua_State
*L
)
994 struct display
*iter
;
998 for (iter
= displays
, count
= 0; iter
; iter
= iter
->d_next
, count
++) {
999 lua_pushinteger(L
, count
);
1000 push_display(L
, &iter
);
1001 lua_settable(L
, -3);
1007 extern struct layout
*layouts
;
1009 screen_get_layouts(lua_State
*L
)
1011 struct layout
*iter
;
1015 for (iter
= layouts
, count
= 0; iter
; iter
= iter
->lay_next
, count
++) {
1016 lua_pushinteger(L
, iter
->lay_number
);
1017 push_layout(L
, &iter
);
1018 lua_settable(L
, -3);
1025 screen_get_display(lua_State
*L
)
1027 push_display(L
, &display
);
1032 screen_exec_command(lua_State
*L
)
1034 const char *command
;
1037 command
= luaL_checklstring(L
, 1, &len
);
1039 RcLine((char *)command
, len
);
1045 screen_append_msg(lua_State
*L
)
1047 const char *msg
, *color
;
1049 msg
= luaL_checklstring(L
, 1, &len
);
1050 if (lua_isnil(L
, 2))
1053 color
= luaL_checklstring(L
, 2, &len
);
1054 AppendWinMsgRend(msg
, color
);
1065 script_input_fn(char *buf
, int len
, char *priv
)
1067 struct sinput_data
*sidata
= (struct sinput_data
*)priv
;
1068 lua_handler lh
= sidata
->lh
;
1069 lua_State
*L
= sidata
->L
;
1071 LuaPushHandler(L
, lh
);
1072 lua_pushstring(L
, buf
);
1073 if (lua_pcall(L
, 1, 0, 0) == LUA_ERRRUN
)
1075 if(lua_isstring(L
, -1))
1081 LuaFreeHandler(L
, &lh
);
1085 screen_input(lua_State
*L
)
1089 const char * prompt
= NULL
, *prefill
= NULL
;
1091 struct sinput_data
*sidata
;
1093 prompt
= luaL_checkstring(L
, 1);
1094 lh
= LuaCheckHandler(L
, 2, 1);
1096 luaL_error(L
, "Out of Memory");
1098 if (lua_gettop(L
) >= 3)
1099 prefill
= luaL_checkstring(L
, 3);
1102 sidata
= (struct sinput_data
*)malloc(sizeof(struct sinput_data
));
1105 LuaFreeHandler(L
, &lh
);
1106 luaL_error(L
, "Out of Memory");
1111 Input((char *)prompt
, 100, INP_COOKED
, script_input_fn
, (char *)sidata
, 0);
1115 for (; *prefill
; prefill
++)
1117 if ((*(unsigned char *)prefill
& 0x7f) < 0x20 || *prefill
== 0x7f)
1119 ss
= (char *)prefill
;
1121 LayProcess(&ss
, &n
);
1127 sev_schedule_fn(struct event
*ev
, char *data
)
1129 struct sinput_data
*si
= (struct sinput_data
*)data
;
1130 lua_handler lh
= si
->lh
;
1131 lua_State
*L
= si
->L
;
1136 LuaPushHandler(L
, lh
);
1137 if (lua_pcall(L
, 1, 0, 0) == LUA_ERRRUN
)
1139 if(lua_isstring(L
, -1))
1144 LuaFreeHandler(L
, &lh
);
1148 screen_schedule(lua_State
*L
)
1150 int timeout
= luaL_checkinteger(L
, 1);
1151 lua_handler lh
= LuaCheckHandler(L
, 2, 1);
1152 struct sinput_data
*si
;
1157 ev
= (struct event
*) calloc(1, sizeof(struct event
));
1160 LuaFreeHandler(L
, &lh
);
1161 luaL_error(L
, "Out of Memory");
1163 si
= (struct sinput_data
*) malloc(sizeof(struct sinput_data
));
1166 LuaFreeHandler(L
, &lh
);
1168 luaL_error(L
, "Out of Memory");
1173 ev
->type
= EV_TIMEOUT
;
1174 ev
->data
= (char *)si
;
1175 ev
->handler
= sev_schedule_fn
;
1177 SetTimeout(ev
, timeout
* 1000);
1181 static const luaL_reg screen_methods
[] = {
1182 {"windows", screen_get_windows
},
1183 {"displays", screen_get_displays
},
1184 {"layouts", screen_get_layouts
},
1185 {"display", screen_get_display
},
1186 {"command", screen_exec_command
},
1187 {"append_msg", screen_append_msg
},
1188 {"hook", LuaRegEvent
},
1189 {"input", screen_input
},
1190 {"schedule", screen_schedule
},
1194 static const luaL_reg screen_metamethods
[] = {
1198 static const struct Xet_reg screen_setters
[] = {
1202 static const struct Xet_reg screen_getters
[] = {
1208 /** Public functions {{{ */
1210 /* FIXME: This code only tracks one unhook ticket for a lua func.
1211 * So it does not work if one func is registered more than one times. */
1213 prepare_weak_table(lua_State
*L
, const char *name
, const char *mode
)
1215 luaL_getmetatable(L
, "screen");
1217 lua_pushstring(L
, name
);
1220 /* prepare a metatable to indicate weak table */
1222 lua_pushstring(L
, "__mode");
1223 lua_pushstring(L
, mode
);
1225 /* Mark weak table */
1226 lua_setmetatable(L
, -2);
1231 static lua_State
*L
;
1234 L
= luaL_newstate();
1238 #define REGISTER(X) struct_register(L, #X , X ## _methods, X##_metamethods, X##_setters, X##_getters)
1247 /* To store handler funcs */
1249 /*_two kinds of information are mantained:
1251 * funcreg[key]->func
1252 * The 'func' part of the tables are weak. That means the registered funcs
1253 * will be collected once the func is no longer available (e.g. overwritten
1254 * by a new instance of the script)
1256 * To make this process happens faster, GC is forced at the end of each
1258 * TODO: What if some events are triggered within the sourcing
1261 prepare_weak_table(L
, "_funcreg", "v");
1263 /* funcunhook[func]->listener
1264 * The listener is the unhook ticket of the hook. which should be collected
1265 * once the func is collected. The gc metamethod will be triggered
1267 prepare_weak_table(L
, "_funcunhook", "k");
1272 /* An error message on top of the stack. */
1274 LuaShowErr(lua_State
*L
)
1276 struct display
*d
= display
;
1278 const char *message
= luaL_checklstring(L
, -1, &len
);
1280 LMsg(0, "%s", message
? message
: "Unknown error");
1286 void (*push_fn
)(lua_State
*, void*);
1291 LuaCallProcess(const char *name
, struct fn_def defs
[])
1295 lua_getfield(L
, LUA_GLOBALSINDEX
, name
);
1296 if (lua_isnil(L
, -1))
1301 for (argc
= 0; defs
[argc
].push_fn
; argc
++)
1302 defs
[argc
].push_fn(L
, defs
[argc
].value
);
1303 if (lua_pcall(L
, argc
, 0, 0) == LUA_ERRRUN
&& lua_isstring(L
, -1))
1311 /* FIXME: Think about this: will it affect the registered handlers?*/
1312 int LuaSource(const char *file
, int async
)
1317 if (stat(file
, &st
) == -1)
1318 Msg(errno
, "Error loading lua script file '%s'", file
);
1321 int len
= strlen(file
);
1322 if (len
< 4 || strncmp(file
+ len
- 4, ".lua", 4) != 0)
1324 if (luaL_dofile(L
, file
) && lua_isstring(L
, -1))
1331 /* It seems that I need two GC passes to really collect the unhook
1332 * ticket, after changing the reference to ticket in the
1333 * 'funcunhook' table from weak to strong. This should not be
1334 * harmful, but how can I make sure that two passes is enough?
1337 * This seems reasonable, since the first pass will collect the func
1338 * itself and make the ticket garbage, and the second pass will
1339 * collect the ticket itself.
1341 * TODO: check this out. maybe ask some lua gurus. */
1342 lua_gc(L
, LUA_GCCOLLECT
, 0);
1343 lua_gc(L
, LUA_GCCOLLECT
, 0);
1360 push_stringarray(lua_State
*L
, char **args
)
1364 for (i
= 1; args
&& *args
; i
++) {
1365 lua_pushinteger(L
, i
);
1366 lua_pushstring(L
, *args
++);
1367 lua_settable(L
, -3);
1372 LuaPushParams(lua_State
*L
, const char *params
, va_list va
)
1380 lua_pushstring(L
, va_arg(va
, char *));
1383 push_stringarray(L
, va_arg(va
, char **));
1386 lua_pushinteger(L
, va_arg(va
, int));
1390 struct display
*d
= va_arg(va
, struct display
*);
1391 push_display(L
, &d
);
1396 struct win
*w
= va_arg(va
, struct win
*);
1402 struct canvas
*c
= va_arg(va
, struct canvas
*);
1413 int LuaCall(const char *func
, const char **argv
)
1419 StackDump(L
, "Before LuaCall\n");
1420 lua_getfield(L
, LUA_GLOBALSINDEX
, func
);
1421 if (lua_isnil(L
, -1))
1424 lua_pushstring(L
, "Could not find the script function\n");
1428 for (argc
= 0; *argv
; argv
++, argc
++)
1430 lua_pushstring(L
, *argv
);
1432 if (lua_pcall(L
, argc
, 0, 0) == LUA_ERRRUN
)
1434 if(lua_isstring(L
, -1))
1436 StackDump(L
, "After LuaCall\n");
1444 /*** Lua callback handler management {{{ */
1447 LuaPushHTable(lua_State
*L
, int screen
, const char * t
)
1449 lua_pushstring(L
, t
);
1450 lua_rawget(L
, screen
);
1451 /* FIXME: Do we need to balance the stack here? */
1452 if (lua_isnil(L
, -1))
1453 luaL_error(L
, "Fatal! Fail to get function registeration table!");
1454 return lua_gettop(L
);
1458 LuaPushHandler(lua_State
*L
, lua_handler lh
)
1461 if (lh
->type
== LUA_HANDLER_TYPE_F
)
1463 luaL_getmetatable(L
, "screen");
1464 funcreg
= LuaPushHTable(L
, lua_gettop(L
), "_funcreg");
1465 lua_rawgeti(L
, funcreg
, lh
->u
.reference
);
1471 lua_getfield(L
, LUA_GLOBALSINDEX
, lh
->u
.name
);
1476 LuaFuncKey(lua_State
*L
, int idx
, int ref
)
1478 int key
, funcreg
, sc
;
1479 luaL_getmetatable(L
, "screen");
1481 funcreg
= LuaPushHTable(L
, sc
, "_funcreg");
1483 lua_pushvalue(L
, idx
);
1484 key
= luaL_ref(L
, funcreg
);
1490 LuaHUnRef(lua_State
*L
, int key
)
1493 luaL_getmetatable(L
, "screen");
1495 funcreg
= LuaPushHTable(L
, sc
, "_funcreg");
1496 luaL_unref(L
, funcreg
, key
);
1500 LuaCheckHandler(lua_State
*L
, int idx
, int ref
)
1504 idx
= lua_gettop(L
) + 1 - idx
;
1506 if (lua_isstring(L
, idx
))
1508 const char * handler
;
1509 /* registered with func name.*/
1510 handler
= luaL_checkstring(L
, idx
);
1511 lua_getfield(L
, LUA_GLOBALSINDEX
, handler
);
1512 if (!lua_isfunction(L
, -1))
1513 luaL_error(L
, "The specified handler %s in param #%d is not a function", handler
, idx
);
1515 return LuaAllocHandler(handler
, 0);
1517 else if (!lua_isfunction(L
, idx
))
1518 luaL_error(L
, "Handler should be a function or the name of function");
1520 key
= LuaFuncKey(L
, idx
, ref
);
1521 return LuaAllocHandler(NULL
, key
);
1527 LuaDispatch(void *handler
, const char *params
, va_list va
)
1529 lua_handler lh
= (lua_handler
)handler
;
1532 StackDump(L
, "before dispatch");
1534 LuaPushHandler(L
, lh
);
1535 if (lua_isnil(L
, -1))
1540 argc
= LuaPushParams(L
, params
, va
);
1542 if (lua_pcall(L
, argc
, 1, 0) == LUA_ERRRUN
&& lua_isstring(L
, -1))
1544 StackDump(L
, "After LuaDispatch\n");
1548 retvalue
= lua_tonumber(L
, -1);
1553 /*FIXME: what if a func is registered twice or more? */
1555 LuaRegAutoUnHook(lua_State
*L
, lua_handler lh
, int ticket
)
1558 luaL_getmetatable(L
, "screen");
1560 funcunhook
= LuaPushHTable(L
, sc
, "_funcunhook");
1561 LuaPushHandler(L
, lh
);
1562 lua_pushvalue(L
, ticket
);
1563 lua_rawset(L
, funcunhook
);
1567 #define SEVNAME_MAX 30
1569 LuaRegEvent(lua_State
*L
)
1571 /* signature: hook(obj, event, handler, priv);
1572 * or: hook(event, handler, priv)
1573 * returns: A ticket for later unregister. */
1574 int idx
= 1, argc
= lua_gettop(L
);
1575 unsigned int priv
= 31; /* Default privilege */
1579 const char *objname
= "global";
1581 static char evbuf
[SEVNAME_MAX
];
1584 struct script_event
*sev
;
1586 StackDump(L
, "Before RegEvent\n");
1588 /* Identify the object, if specified */
1589 if (luaL_getmetafield(L
, 1, "_objname"))
1591 objname
= luaL_checkstring(L
, -1);
1593 if (!strcmp("screen", objname
))
1597 obj
= get_broker_obj((struct broker
**)lua_touserdata(L
, 1));
1599 return luaL_error(L
, "Invalid object specified");
1604 event
= luaL_checkstring(L
, idx
++);
1605 snprintf(evbuf
, SEVNAME_MAX
, "%s_%s", objname
, event
);
1607 /* Check and get the handler */
1608 lh
= LuaCheckHandler(L
, idx
++, 1);
1610 luaL_error(L
, "Out of memory");
1612 StackDump(L
, "In RegEvent\n");
1615 priv
= luaL_checkinteger(L
, idx
);
1617 sev
= object_get_event(obj
, evbuf
);
1622 l
= (struct listener
*)malloc(sizeof(struct listener
));
1624 return luaL_error(L
, "Out of memory");
1626 l
->bd
= &lua_binding
;
1627 l
->handler
= (void *)lh
;
1628 register_listener(sev
, l
);
1629 /* Return the ticket for un-register */
1630 push_callback(L
, &l
);
1631 ticket
= lua_gettop(L
);
1633 LuaRegAutoUnHook(L
, lh
, ticket
);
1636 return luaL_error(L
, "Invalid event specified: %s for object %s", event
, objname
);
1638 StackDump(L
, "After RegEvent\n");
1644 struct binding lua_binding
=