Repository navigation
Expand file tree
/
Copy pathluaa.c
More file actions
615 lines (531 loc) · 15.8 KB
/
Copy pathluaa.c
File metadata and controls
615 lines (531 loc) · 15.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
/*
* luaa.c - Lua configuration management
*
* 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.
*
*/
#define _GNU_SOURCE
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <basedir_fs.h>
#include <xcb/xcb_atom.h>
#include "awesome.h"
#include "config.h"
#include "objects/timer.h"
#include "awesome-version-internal.h"
#include "ewmh.h"
#include "luaa.h"
#include "spawn.h"
#include "objects/tag.h"
#include "objects/client.h"
#include "objects/drawin.h"
#include "objects/drawable.h"
#include "screen.h"
#include "event.h"
#include "property.h"
#include "selection.h"
#include "systray.h"
#include "common/xcursor.h"
#include "common/buffer.h"
#include "common/backtrace.h"
#ifdef WITH_DBUS
extern const struct luaL_Reg awesome_dbus_lib[];
#endif
extern const struct luaL_Reg awesome_keygrabber_lib[];
extern const struct luaL_Reg awesome_mousegrabber_lib[];
extern const struct luaL_Reg awesome_root_lib[];
extern const struct luaL_Reg awesome_mouse_methods[];
extern const struct luaL_Reg awesome_mouse_meta[];
extern const struct luaL_Reg awesome_screen_methods[];
extern const struct luaL_Reg awesome_screen_meta[];
/** Path to config file */
static char *conffile;
/** Check whether a composite manager is running.
* \return True if such a manager is running.
*/
static bool
composite_manager_running(void)
{
xcb_intern_atom_reply_t *atom_r;
xcb_get_selection_owner_reply_t *selection_r;
char *atom_name;
bool result;
if(!(atom_name = xcb_atom_name_by_screen("_NET_WM_CM", globalconf.default_screen)))
{
warn("error getting composite manager atom");
return false;
}
atom_r = xcb_intern_atom_reply(globalconf.connection,
xcb_intern_atom_unchecked(globalconf.connection, false,
a_strlen(atom_name), atom_name),
NULL);
p_delete(&atom_name);
if(!atom_r)
return false;
selection_r = xcb_get_selection_owner_reply(globalconf.connection,
xcb_get_selection_owner_unchecked(globalconf.connection,
atom_r->atom),
NULL);
p_delete(&atom_r);
result = selection_r != NULL && selection_r->owner != XCB_NONE;
p_delete(&selection_r);
return result;
}
/** Quit awesome.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_quit(lua_State *L)
{
g_main_loop_quit(globalconf.loop);
return 0;
}
/** Execute another application, probably a window manager, to replace
* awesome.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam The command line to execute.
*/
static int
luaA_exec(lua_State *L)
{
const char *cmd = luaL_checkstring(L, 1);
awesome_atexit(false);
a_exec(cmd);
return 0;
}
/** Restart awesome.
*/
static int
luaA_restart(lua_State *L)
{
awesome_restart();
return 0;
}
/** Load an image from a given path.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam The command line to execute.
*/
static int
luaA_load_image(lua_State *L)
{
const char *filename = luaL_checkstring(L, 1);
cairo_surface_t *surface = draw_load_image(L, filename);
if (!surface)
return 0;
/* lua has to make sure to free the ref or we have a leak */
lua_pushlightuserdata(L, surface);
return 1;
}
/** UTF-8 aware string length computing.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_mbstrlen(lua_State *L)
{
const char *cmd = luaL_checkstring(L, 1);
lua_pushnumber(L, (ssize_t) mbstowcs(NULL, NONULL(cmd), 0));
return 1;
}
/** Enhanced type() function which recognize awesome objects.
* \param L The Lua VM state.
* \return The number of arguments pushed on the stack.
*/
static int
luaAe_type(lua_State *L)
{
luaL_checkany(L, 1);
lua_pushstring(L, luaA_typename(L, 1));
return 1;
}
/** Replace various standards Lua functions with our own.
* \param L The Lua VM state.
*/
static void
luaA_fixups(lua_State *L)
{
/* export string.wlen */
lua_getglobal(L, "string");
lua_pushcfunction(L, luaA_mbstrlen);
lua_setfield(L, -2, "wlen");
lua_pop(L, 1);
/* replace type */
lua_pushcfunction(L, luaAe_type);
lua_setglobal(L, "type");
/* set selection */
lua_pushcfunction(L, luaA_selection_get);
lua_setglobal(L, "selection");
}
/** awesome global table.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lfield conffile The configuration file which has been loaded.
* \lfield version The version of awesome.
* \lfield release The release name of awesome.
* \lfield startup True if we are still in startup, false otherwise.
* \lfield startup_errors Error message for errors that occured during startup.
* \lfield composite_manager_running True if a composite manager is running.
*/
static int
luaA_awesome_index(lua_State *L)
{
if(luaA_usemetatable(L, 1, 2))
return 1;
const char *buf = luaL_checkstring(L, 2);
if(A_STREQ(buf, "conffile"))
{
lua_pushstring(L, conffile);
return 1;
}
if(A_STREQ(buf, "version"))
{
lua_pushliteral(L, AWESOME_VERSION);
return 1;
}
if(A_STREQ(buf, "release"))
{
lua_pushliteral(L, AWESOME_RELEASE);
return 1;
}
if(A_STREQ(buf, "startup"))
{
lua_pushboolean(L, globalconf.loop == NULL);
return 1;
}
if(A_STREQ(buf, "startup_errors"))
{
if (globalconf.startup_errors.len == 0)
return 0;
lua_pushstring(L, globalconf.startup_errors.s);
return 1;
}
if(A_STREQ(buf, "composite_manager_running"))
{
lua_pushboolean(L, composite_manager_running());
return 1;
}
return luaA_default_index(L);
}
/** Add a global signal.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam A string with the event name.
* \lparam The function to call.
*/
static int
luaA_awesome_connect_signal(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
luaA_checkfunction(L, 2);
signal_connect(&global_signals, name, luaA_object_ref(L, 2));
return 0;
}
/** Remove a global signal.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam A string with the event name.
* \lparam The function to call.
*/
static int
luaA_awesome_disconnect_signal(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
luaA_checkfunction(L, 2);
const void *func = lua_topointer(L, 2);
signal_disconnect(&global_signals, name, func);
luaA_object_unref(L, (void *) func);
return 0;
}
/** Emit a global signal.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam A string with the event name.
* \lparam The function to call.
*/
static int
luaA_awesome_emit_signal(lua_State *L)
{
signal_object_emit(L, &global_signals, luaL_checkstring(L, 1), lua_gettop(L) - 1);
return 0;
}
static int
luaA_panic(lua_State *L)
{
warn("unprotected error in call to Lua API (%s)",
lua_tostring(L, -1));
buffer_t buf;
backtrace_get(&buf);
warn("dumping backtrace\n%s", buf.s);
warn("restarting awesome");
awesome_restart();
return 0;
}
static int
luaA_dofunction_on_error(lua_State *L)
{
/* duplicate string error */
lua_pushvalue(L, -1);
/* emit error signal */
signal_object_emit(L, &global_signals, "debug::error", 1);
if(!luaL_dostring(L, "return debug.traceback(\"error while running function\", 3)"))
{
/* Move traceback before error */
lua_insert(L, -2);
/* Insert sentence */
lua_pushliteral(L, "\nerror: ");
/* Move it before error */
lua_insert(L, -2);
lua_concat(L, 3);
}
return 1;
}
/** Initialize the Lua VM
* \param xdg An xdg handle to use to get XDG basedir.
*/
void
luaA_init(xdgHandle* xdg)
{
lua_State *L;
static const struct luaL_Reg awesome_lib[] =
{
{ "quit", luaA_quit },
{ "exec", luaA_exec },
{ "spawn", luaA_spawn },
{ "restart", luaA_restart },
{ "connect_signal", luaA_awesome_connect_signal },
{ "disconnect_signal", luaA_awesome_disconnect_signal },
{ "emit_signal", luaA_awesome_emit_signal },
{ "systray", luaA_systray },
{ "load_image", luaA_load_image },
{ "register_xproperty", luaA_register_xproperty },
{ "set_xproperty", luaA_set_xproperty },
{ "get_xproperty", luaA_get_xproperty },
{ "__index", luaA_awesome_index },
{ "__newindex", luaA_default_newindex },
{ NULL, NULL }
};
L = globalconf.L = luaL_newstate();
/* Set panic function */
lua_atpanic(L, luaA_panic);
/* Set error handling function */
lualib_dofunction_on_error = luaA_dofunction_on_error;
luaL_openlibs(L);
luaA_fixups(L);
luaA_object_setup(L);
/* Export awesome lib */
luaA_openlib(L, "awesome", awesome_lib, awesome_lib);
/* Export root lib */
luaA_registerlib(L, "root", awesome_root_lib);
lua_pop(L, 1); /* luaA_registerlib() leaves the table on stack */
#ifdef WITH_DBUS
/* Export D-Bus lib */
luaA_registerlib(L, "dbus", awesome_dbus_lib);
lua_pop(L, 1); /* luaA_registerlib() leaves the table on stack */
#endif
/* Export keygrabber lib */
luaA_registerlib(L, "keygrabber", awesome_keygrabber_lib);
lua_pop(L, 1); /* luaA_registerlib() leaves the table on stack */
/* Export mousegrabber lib */
luaA_registerlib(L, "mousegrabber", awesome_mousegrabber_lib);
lua_pop(L, 1); /* luaA_registerlib() leaves the table on stack */
/* Export screen */
luaA_openlib(L, "screen", awesome_screen_methods, awesome_screen_meta);
/* Export mouse */
luaA_openlib(L, "mouse", awesome_mouse_methods, awesome_mouse_meta);
/* Export button */
button_class_setup(L);
/* Export tag */
tag_class_setup(L);
/* Export window */
window_class_setup(L);
/* Export drawable */
drawable_class_setup(L);
/* Export drawin */
drawin_class_setup(L);
/* Export client */
client_class_setup(L);
/* Export keys */
key_class_setup(L);
/* Export timer */
timer_class_setup(L);
/* add Lua search paths */
lua_getglobal(L, "package");
if (LUA_TTABLE != lua_type(L, 1))
{
warn("package is not a table");
return;
}
lua_getfield(L, 1, "path");
if (LUA_TSTRING != lua_type(L, 2))
{
warn("package.path is not a string");
lua_pop(L, 1);
return;
}
/* add XDG_CONFIG_DIR as include path */
const char * const *xdgconfigdirs = xdgSearchableConfigDirectories(xdg);
for(; *xdgconfigdirs; xdgconfigdirs++)
{
size_t len = a_strlen(*xdgconfigdirs);
lua_pushliteral(L, ";");
lua_pushlstring(L, *xdgconfigdirs, len);
lua_pushliteral(L, "/awesome/?.lua");
lua_concat(L, 3);
lua_pushliteral(L, ";");
lua_pushlstring(L, *xdgconfigdirs, len);
lua_pushliteral(L, "/awesome/?/init.lua");
lua_concat(L, 3);
lua_concat(L, 3); /* concatenate with package.path */
}
/* add Lua lib path (/usr/share/awesome/lib by default) */
lua_pushliteral(L, ";" AWESOME_LUA_LIB_PATH "/?.lua");
lua_pushliteral(L, ";" AWESOME_LUA_LIB_PATH "/?/init.lua");
lua_concat(L, 3); /* concatenate with package.path */
lua_setfield(L, 1, "path"); /* package.path = "concatenated string" */
lua_getfield(L, 1, "loaded");
lua_pop(L, 2); /* pop "package" and "package.loaded" */
signal_add(&global_signals, "debug::error");
signal_add(&global_signals, "debug::deprecation");
signal_add(&global_signals, "debug::index::miss");
signal_add(&global_signals, "debug::newindex::miss");
signal_add(&global_signals, "systray::update");
signal_add(&global_signals, "wallpaper_changed");
signal_add(&global_signals, "refresh");
signal_add(&global_signals, "exit");
}
static void
luaA_startup_error(const char *err)
{
if (globalconf.startup_errors.len > 0)
buffer_addsl(&globalconf.startup_errors, "\n\n");
buffer_adds(&globalconf.startup_errors, err);
}
static bool
luaA_loadrc(const char *confpath, bool run)
{
if(!luaL_loadfile(globalconf.L, confpath))
{
if(run)
{
/* Set the conffile right now so it can be used inside the
* configuration file. */
conffile = a_strdup(confpath);
/* Move error handling function before function */
lua_pushcfunction(globalconf.L, luaA_dofunction_on_error);
lua_insert(globalconf.L, -2);
if(lua_pcall(globalconf.L, 0, LUA_MULTRET, -2))
{
const char *err = lua_tostring(globalconf.L, -1);
luaA_startup_error(err);
fprintf(stderr, "%s\n", err);
/* An error happened, so reset this. */
conffile = NULL;
}
else
return true;
}
else
{
lua_pop(globalconf.L, 1);
return true;
}
}
else
{
const char *err = lua_tostring(globalconf.L, -1);
luaA_startup_error(err);
fprintf(stderr, "%s\n", err);
}
return false;
}
/** Load a configuration file.
* \param xdg An xdg handle to use to get XDG basedir.
* \param confpatharg The configuration file to load.
* \param run Run the configuration file.
*/
bool
luaA_parserc(xdgHandle* xdg, const char *confpatharg, bool run)
{
char *confpath = NULL;
bool ret = false;
/* try to load, return if it's ok */
if(confpatharg)
{
if(luaA_loadrc(confpatharg, run))
{
ret = true;
goto bailout;
}
else if(!run)
goto bailout;
}
confpath = xdgConfigFind("awesome/rc.lua", xdg);
char *tmp = confpath;
/* confpath is "string1\0string2\0string3\0\0" */
while(*tmp)
{
if(luaA_loadrc(tmp, run))
{
ret = true;
goto bailout;
}
else if(!run)
goto bailout;
tmp += a_strlen(tmp) + 1;
}
bailout:
p_delete(&confpath);
return ret;
}
int
luaA_class_index_miss_property(lua_State *L, lua_object_t *obj)
{
signal_object_emit(L, &global_signals, "debug::index::miss", 2);
return 0;
}
int
luaA_class_newindex_miss_property(lua_State *L, lua_object_t *obj)
{
signal_object_emit(L, &global_signals, "debug::newindex::miss", 3);
return 0;
}
void
luaA_emit_refresh()
{
signal_object_emit(globalconf.L, &global_signals, "refresh", 0);
}
int
luaA_default_index(lua_State *L)
{
return luaA_class_index_miss_property(L, NULL);
}
int
luaA_default_newindex(lua_State *L)
{
return luaA_class_newindex_miss_property(L, NULL);
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80