lua.c

   1 /*
   2  * lua.c - Lua configuration management
   3  *
   4  * Copyright © 2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <sys/socket.h>
  25 #include <sys/un.h>
  26 #include <unistd.h>
  27
  28 #include <ev.h>
  29
  30 #include <lua.h>
  31 #include <lauxlib.h>
  32 #include <lualib.h>
  33
  34 #include <xcb/xcb.h>
  35 #include <xcb/xcb_aux.h>
  36
  37 #include "awesome-version-internal.h"
  38 #include "ewmh.h"
  39 #include "config.h"
  40 #include "lua.h"
  41 #include "tag.h"
  42 #include "client.h"
  43 #include "statusbar.h"
  44 #include "titlebar.h"
  45 #include "screen.h"
  46 #include "layouts/tile.h"
  47 #include "common/socket.h"
  48
  49 extern awesome_t globalconf;
  50
  51 extern const struct luaL_reg awesome_keygrabber_lib[];
  52 extern const struct luaL_reg awesome_mouse_methods[];
  53 extern const struct luaL_reg awesome_mouse_meta[];
  54 extern const struct luaL_reg awesome_screen_methods[];
  55 extern const struct luaL_reg awesome_screen_meta[];
  56 extern const struct luaL_reg awesome_client_methods[];
  57 extern const struct luaL_reg awesome_client_meta[];
  58 extern const struct luaL_reg awesome_titlebar_methods[];
  59 extern const struct luaL_reg awesome_titlebar_meta[];
  60 extern const struct luaL_reg awesome_tag_methods[];
  61 extern const struct luaL_reg awesome_tag_meta[];
  62 extern const struct luaL_reg awesome_widget_methods[];
  63 extern const struct luaL_reg awesome_widget_meta[];
  64 extern const struct luaL_reg awesome_statusbar_methods[];
  65 extern const struct luaL_reg awesome_statusbar_meta[];
  66 extern const struct luaL_reg awesome_keybinding_methods[];
  67 extern const struct luaL_reg awesome_keybinding_meta[];
  68
  69 static struct sockaddr_un *addr;
  70 static ev_io csio = { .fd = -1 };
  71
  72 /** Add a global mouse binding. This binding will be available when you'll
  73  * click on root window.
  74  * \param L The Lua VM state.
  75  *
  76  * \luastack
  77  * \lparam A mouse button binding.
  78  */
  79 static int
  80 luaA_mouse_add(lua_State *L)
  81 {
  82     button_t **button = luaA_checkudata(L, 1, "mouse");
  83
  84     button_list_push(&globalconf.buttons.root, *button);
  85     button_ref(button);
  86
  87     return 0;
  88 }
  89
  90 /** Quit awesome.
  91  */
  92 static int
  93 luaA_quit(lua_State *L __attribute__ ((unused)))
  94 {
  95     ev_unloop(globalconf.loop, 1);
  96     return 0;
  97 }
  98
  99 /** Execute another application, probably a window manager, to replace
 100  * awesome.
 101  * \param L The Lua VM state.
 102  *
 103  * \luastack
 104  * \lparam The command line to execute.
 105  */
 106 static int
 107 luaA_exec(lua_State *L)
 108 {
 109     client_t *c;
 110     const char *cmd = luaL_checkstring(L, 1);
 111
 112     for(c = globalconf.clients; c; c = c->next)
 113         client_unban(c);
 114
 115     xcb_aux_sync(globalconf.connection);
 116     xcb_disconnect(globalconf.connection);
 117
 118     a_exec(cmd);
 119     return 0;
 120 }
 121
 122 /** Restart awesome.
 123  */
 124 static int
 125 luaA_restart(lua_State *L __attribute__ ((unused)))
 126 {
 127     ewmh_restart();
 128     return 0;
 129 }
 130
 131 /** Set the function called each time a client gets focus. This function is
 132  * called with the client object as argument.
 133  * \param L The Lua VM state.
 134  * \return The number of elements pushed on stack.
 135  *
 136  * \luastack
 137  * \lparam A function to call each time a client gets focus.
 138  */
 139 static int
 140 luaA_hooks_focus(lua_State *L)
 141 {
 142     return luaA_registerfct(L, &globalconf.hooks.focus);
 143 }
 144
 145 /** Set the function called each time a client loses focus. This function is
 146  * called with the client object as argument.
 147  * \param L The Lua VM state.
 148  *
 149  * \luastack
 150  * \lparam A function to call each time a client loses focus.
 151  */
 152 static int
 153 luaA_hooks_unfocus(lua_State *L)
 154 {
 155     return luaA_registerfct(L, &globalconf.hooks.unfocus);
 156 }
 157
 158 /** Set the function called each time a new client appears. This function is
 159  * called with the client object as argument.
 160  * \param L The Lua VM state.
 161  *
 162  * \luastack
 163  * \lparam A function to call on each new client.
 164  */
 165 static int
 166 luaA_hooks_manage(lua_State *L)
 167 {
 168     return luaA_registerfct(L, &globalconf.hooks.manage);
 169 }
 170
 171 /** Set the function called each time a client goes away. This function is
 172  * called with the client object as argument.
 173  * \param L The Lua VM state.
 174  *
 175  * \luastack
 176  * \lparam A function to call when a client goes away.
 177  */
 178 static int
 179 luaA_hooks_unmanage(lua_State *L)
 180 {
 181     return luaA_registerfct(L, &globalconf.hooks.unmanage);
 182 }
 183
 184 /** Set the function called each time the mouse enter a new window. This
 185  * function is called with the client object as argument.
 186  * \param L The Lua VM state.
 187  *
 188  * \luastack
 189  * \lparam A function to call each time a client gets mouse over it.
 190  */
 191 static int
 192 luaA_hooks_mouseover(lua_State *L)
 193 {
 194     return luaA_registerfct(L, &globalconf.hooks.mouseover);
 195 }
 196
 197 /** Set the function called on each screen arrange. This function is called
 198  * with the screen number as argument.
 199  * \param L The Lua VM state.
 200  *
 201  * \luastack
 202  * \lparam A function to call on each screen arrange.
 203  */
 204 static int
 205 luaA_hooks_arrange(lua_State *L)
 206 {
 207     return luaA_registerfct(L, &globalconf.hooks.arrange);
 208 }
 209
 210 /** Set the function called on each title update. This function is called with
 211  * the client object as argument.
 212  * \param L The Lua VM state.
 213  *
 214  * \luastack
 215  * \lparam A function to call on each title update of each client.
 216  */
 217 static int
 218 luaA_hooks_titleupdate(lua_State *L)
 219 {
 220     return luaA_registerfct(L, &globalconf.hooks.titleupdate);
 221 }
 222
 223 /** Set the function called when a client get urgency flag. This function is called with
 224  * the client object as argument.
 225  * \param L The Lua VM state.
 226  *
 227  * \luastack
 228  * \lparam A function to call when a client get the urgent flag.
 229  */
 230 static int
 231 luaA_hooks_urgent(lua_State *L)
 232 {
 233     return luaA_registerfct(L, &globalconf.hooks.urgent);
 234 }
 235
 236 /** Set the function to be called every N seconds.
 237  * \param L The Lua VM state.
 238  *
 239  * \luastack
 240  * \lparam The number of seconds to run function every. Set 0 to disable.
 241  * \lparam A function to call every N seconds (optional).
 242  */
 243 static int
 244 luaA_hooks_timer(lua_State *L)
 245 {
 246     globalconf.timer.repeat = luaL_checknumber(L, 1);
 247
 248     if(lua_gettop(L) == 2 && !lua_isnil(L, 2))
 249         luaA_registerfct(L, &globalconf.hooks.timer);
 250
 251     ev_timer_again(globalconf.loop, &globalconf.timer);
 252     return 0;
 253 }
 254
 255 /** Set default font.
 256  * \param L The Lua VM state.
 257  *
 258  * \luastack
 259  * \lparam A string with a font name in Pango format.
 260  */
 261 static int
 262 luaA_font_set(lua_State *L)
 263 {
 264     const char *font = luaL_checkstring(L, 1);
 265     draw_font_delete(&globalconf.font);
 266     globalconf.font = draw_font_new(globalconf.connection,
 267                                     globalconf.default_screen, font);
 268     return 0;
 269 }
 270
 271 /** Set default colors.
 272  * \param L The Lua VM state.
 273  *
 274  * \luastack
 275  * \lparam A table with `fg' and `bg' elements, containing colors.
 276  */
 277 static int
 278 luaA_colors_set(lua_State *L)
 279 {
 280     const char *buf;
 281     size_t len;
 282
 283     luaA_checktable(L, 1);
 284
 285     if((buf = luaA_getopt_lstring(L, 1, "fg", NULL, &len)))
 286        xcolor_init(&globalconf.colors.fg, globalconf.connection,
 287                    globalconf.default_screen, buf, len);
 288
 289     if((buf = luaA_getopt_lstring(L, 1, "bg", NULL, &len)))
 290        xcolor_init(&globalconf.colors.bg, globalconf.connection,
 291                    globalconf.default_screen, buf, len);
 292     return 0;
 293 }
 294
 295 /** Push a pointer onto the stack according to its type.
 296  * \param p The pointer.
 297  * \param type Its type.
 298  */
 299 void
 300 luaA_pushpointer(lua_State *L, void *p, awesome_type_t type)
 301 {
 302     switch(type)
 303     {
 304       case AWESOME_TYPE_STATUSBAR:
 305         luaA_statusbar_userdata_new(L, p);
 306         break;
 307       case AWESOME_TYPE_TITLEBAR:
 308         luaA_titlebar_userdata_new(L, p);
 309         break;
 310     }
 311 }
 312
 313 static void
 314 luaA_openlib(lua_State *L, const char *name,
 315              const struct luaL_reg methods[],
 316              const struct luaL_reg meta[])
 317 {
 318     luaL_newmetatable(L, name);                                        /* 1 */
 319     lua_pushvalue(L, -1);           /* dup metatable                      2 */
 320     lua_setfield(L, -2, "__index"); /* metatable.__index = metatable      1 */
 321
 322     luaL_register(L, NULL, meta);                                      /* 1 */
 323     luaL_register(L, name, methods);                                   /* 2 */
 324     lua_pushvalue(L, -1);           /* dup self as metatable              3 */
 325     lua_setmetatable(L, -2);        /* set self as metatable              2 */
 326     lua_pop(L, 2);
 327 }
 328
 329 static int
 330 luaA_mbstrlen(lua_State *L)
 331 {
 332     const char *cmd = luaL_checkstring(L, 1);
 333     lua_pushnumber(L, mbstowcs(NULL, NONULL(cmd), 0));
 334     return 1;
 335 }
 336
 337 static int
 338 luaA_next(lua_State *L)
 339 {
 340     if(luaL_getmetafield(L, 1, "__next"))
 341     {
 342         lua_insert(L, 1);
 343         lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
 344         return lua_gettop(L);
 345     }
 346
 347     luaL_checktype(L, 1, LUA_TTABLE);
 348     lua_settop(L, 2);
 349     if(lua_next(L, 1))
 350         return 2;
 351     lua_pushnil(L);
 352     return 1;
 353 }
 354
 355 static int
 356 luaA_pairs(lua_State *L)
 357 {
 358     if(luaL_getmetafield(L, 1, "__pairs"))
 359     {
 360         lua_insert(L, 1);
 361         lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
 362         return lua_gettop(L);
 363     }
 364
 365     luaL_checktype(L, 1, LUA_TTABLE);
 366     return luaA_generic_pairs(L);
 367 }
 368
 369 static void
 370 luaA_fixups(lua_State *L)
 371 {
 372     lua_getglobal(L, "string");
 373     lua_pushcfunction(L, luaA_mbstrlen);
 374     lua_setfield(L, -2, "len");
 375     lua_pop(L, 1);
 376     lua_pushliteral(L, "next");
 377     lua_pushcfunction(L, luaA_next);
 378     lua_settable(L, LUA_GLOBALSINDEX);
 379     lua_pushliteral(L, "pairs");
 380     lua_pushcfunction(L, luaA_next);
 381     lua_pushcclosure(L, luaA_pairs, 1); /* pairs get next as upvalue */
 382     lua_settable(L, LUA_GLOBALSINDEX);
 383 }
 384
 385 /** Object table.
 386  * This table can use safely object as key.
 387  * \param L The Lua VM state.
 388  * \return The number of elements pushed on stack.
 389  */
 390 int
 391 luaA_otable_index(lua_State *L)
 392 {
 393     void **obj, **v;
 394
 395     if((obj = lua_touserdata(L, 2)))
 396     {
 397         /* begins at nil */
 398         lua_pushnil(L);
 399         while(lua_next(L, 1))
 400         {
 401             if((v = lua_touserdata(L, -2))
 402                && *v == *obj)
 403                 return 1;
 404             /* removes 'value'; keeps 'key' for next iteration */
 405             lua_pop(L, 1);
 406         }
 407         return 0;
 408     }
 409
 410     lua_rawget(L, 1);
 411     return 1;
 412 }
 413
 414 /** Initialize the Lua VM
 415  */
 416 void
 417 luaA_init(void)
 418 {
 419     lua_State *L;
 420
 421     static const struct luaL_reg otable_methods[] =
 422     {
 423         { "__call", luaA_otable_new },
 424         { NULL, NULL }
 425     };
 426     static const struct luaL_reg otable_meta[] =
 427     {
 428         { "__index", luaA_otable_index },
 429         { NULL, NULL }
 430     };
 431     static const struct luaL_reg awesome_lib[] =
 432     {
 433         { "quit", luaA_quit },
 434         { "exec", luaA_exec },
 435         { "restart", luaA_restart },
 436         { "mouse_add", luaA_mouse_add },
 437         { "font_set", luaA_font_set },
 438         { "colors_set", luaA_colors_set },
 439         { NULL, NULL }
 440     };
 441     static const struct luaL_reg awesome_hooks_lib[] =
 442     {
 443         { "focus", luaA_hooks_focus },
 444         { "unfocus", luaA_hooks_unfocus },
 445         { "manage", luaA_hooks_manage },
 446         { "unmanage", luaA_hooks_unmanage },
 447         { "mouseover", luaA_hooks_mouseover },
 448         { "arrange", luaA_hooks_arrange },
 449         { "titleupdate", luaA_hooks_titleupdate },
 450         { "urgent", luaA_hooks_urgent },
 451         { "timer", luaA_hooks_timer },
 452         { NULL, NULL }
 453     };
 454
 455     L = globalconf.L = luaL_newstate();
 456
 457     luaL_openlibs(L);
 458
 459     luaA_fixups(L);
 460
 461     /* Export awesome lib */
 462     luaL_register(L, "awesome", awesome_lib);
 463
 464     /* Export hooks lib */
 465     luaL_register(L, "hooks", awesome_hooks_lib);
 466
 467     /* Export keygrabber lib */
 468     luaL_register(L, "keygrabber", awesome_keygrabber_lib);
 469
 470     /* Export otable lib */
 471     luaA_openlib(L, "otable", otable_methods, otable_meta);
 472
 473     /* Export screen */
 474     luaA_openlib(L, "screen", awesome_screen_methods, awesome_screen_meta);
 475
 476     /* Export mouse */
 477     luaA_openlib(L, "mouse", awesome_mouse_methods, awesome_mouse_meta);
 478
 479     /* Export tag */
 480     luaA_openlib(L, "tag", awesome_tag_methods, awesome_tag_meta);
 481
 482     /* Export statusbar */
 483     luaA_openlib(L, "statusbar", awesome_statusbar_methods, awesome_statusbar_meta);
 484
 485     /* Export widget */
 486     luaA_openlib(L, "widget", awesome_widget_methods, awesome_widget_meta);
 487
 488     /* Export client */
 489     luaA_openlib(L, "client", awesome_client_methods, awesome_client_meta);
 490
 491     /* Export titlebar */
 492     luaA_openlib(L, "titlebar", awesome_titlebar_methods, awesome_titlebar_meta);
 493
 494     /* Export keys */
 495     luaA_openlib(L, "keybinding", awesome_keybinding_methods, awesome_keybinding_meta);
 496
 497     lua_pushliteral(L, "AWESOME_VERSION");
 498     lua_pushstring(L, AWESOME_VERSION);
 499     lua_settable(L, LUA_GLOBALSINDEX);
 500
 501     luaA_dostring(L, "package.path = package.path .. \";" AWESOME_LUA_LIB_PATH  "/?.lua\"");
 502     luaA_dostring(L, "package.path = package.path .. \";" AWESOME_LUA_LIB_PATH  "/?/init.lua\"");
 503
 504     /* init hooks */
 505     globalconf.hooks.manage = LUA_REFNIL;
 506     globalconf.hooks.unmanage = LUA_REFNIL;
 507     globalconf.hooks.focus = LUA_REFNIL;
 508     globalconf.hooks.unfocus = LUA_REFNIL;
 509     globalconf.hooks.mouseover = LUA_REFNIL;
 510     globalconf.hooks.arrange = LUA_REFNIL;
 511     globalconf.hooks.titleupdate = LUA_REFNIL;
 512     globalconf.hooks.urgent = LUA_REFNIL;
 513     globalconf.hooks.timer = LUA_REFNIL;
 514 }
 515
 516 #define XDG_CONFIG_HOME_DEFAULT "/.config"
 517
 518 #define AWESOME_CONFIG_FILE "/awesome/rc.lua"
 519
 520 /** Load a configuration file.
 521  * \param rcfile The configuration file to load.
 522  */
 523 void
 524 luaA_parserc(const char *confpatharg)
 525 {
 526     int screen;
 527     const char *confdir, *xdg_config_dirs;
 528     char *confpath = NULL, **xdg_files, **buf, path[1024];
 529     ssize_t len;
 530
 531     if(confpatharg)
 532     {
 533         if(luaL_dofile(globalconf.L, confpatharg))
 534             fprintf(stderr, "%s\n", lua_tostring(globalconf.L, -1));
 535         else
 536             goto bailout;
 537     }
 538
 539     confdir = getenv("XDG_CONFIG_HOME");
 540
 541     if((len = a_strlen(confdir)))
 542     {
 543         len += sizeof(AWESOME_CONFIG_FILE);
 544         confpath = p_new(char, len);
 545         a_strcpy(confpath, len, confdir);
 546         /* update package.path */
 547         snprintf(path, sizeof(path) - 1, "package.path = package.path .. \";%s/awesome/?.lua\"", confdir);
 548         luaA_dostring(globalconf.L, path);
 549     }
 550     else
 551     {
 552         confdir = getenv("HOME");
 553         len = a_strlen(confdir) + sizeof(AWESOME_CONFIG_FILE)-1 + sizeof(XDG_CONFIG_HOME_DEFAULT);
 554         confpath = p_new(char, len);
 555         a_strcpy(confpath, len, confdir);
 556         a_strcat(confpath, len, XDG_CONFIG_HOME_DEFAULT);
 557         /* update package.path */
 558         snprintf(path, sizeof(path) - 1, "package.path = package.path .. \";%s" XDG_CONFIG_HOME_DEFAULT "/awesome/?.lua\"", confdir);
 559         luaA_dostring(globalconf.L, path);
 560     }
 561     a_strcat(confpath, len, AWESOME_CONFIG_FILE);
 562
 563     if(luaL_dofile(globalconf.L, confpath))
 564         fprintf(stderr, "%s\n", lua_tostring(globalconf.L, -1));
 565     else
 566         goto bailout;
 567
 568     xdg_config_dirs = getenv("XDG_CONFIG_DIRS");
 569
 570     if(!(len = a_strlen(xdg_config_dirs)))
 571     {
 572         xdg_config_dirs = XDG_CONFIG_DIR;
 573         len = sizeof(XDG_CONFIG_DIR) - 1;
 574     }
 575
 576     xdg_files = a_strsplit(xdg_config_dirs, len, ':');
 577
 578     for(buf = xdg_files; *buf; buf++)
 579     {
 580         p_delete(&confpath);
 581         len = a_strlen(*buf) + sizeof("AWESOME_CONFIG_FILE");
 582         confpath = p_new(char, len);
 583         a_strcpy(confpath, len, *buf);
 584         a_strcat(confpath, len, AWESOME_CONFIG_FILE);
 585         snprintf(path, sizeof(path) - 1, "package.path = package.path .. \";%s/awesome/?.lua\"", *buf);
 586         luaA_dostring(globalconf.L, path);
 587         if(luaL_dofile(globalconf.L, confpath))
 588             fprintf(stderr, "%s\n", lua_tostring(globalconf.L, -1));
 589         else
 590             break;
 591     }
 592
 593     for(buf = xdg_files; *buf; buf++)
 594         p_delete(buf);
 595     p_delete(&xdg_files);
 596
 597   bailout:
 598     /* Assure there's at least one tag */
 599     for(screen = 0; screen < globalconf.screens_info->nscreen; screen++)
 600         if(!globalconf.screens[screen].tags.len)
 601             tag_append_to_screen(tag_new("default", sizeof("default")-1, layout_tile, 0.5, 1, 0), screen);
 602
 603     p_delete(&confpath);
 604 }
 605
 606 /** Parse a command.
 607  * \param cmd The buffer to parse.
 608  * \return true on succes, false on failure.
 609  */
 610 static void
 611 luaA_docmd(const char *cmd)
 612 {
 613     char *p;
 614
 615     while((p = strchr(cmd, '\n')))
 616     {
 617         *p = '\0';
 618         luaA_dostring(globalconf.L, cmd);
 619         cmd = p + 1;
 620     }
 621 }
 622
 623 static void
 624 luaA_cb(EV_P_ ev_io *w, int revents)
 625 {
 626     char buf[1024];
 627     int r;
 628
 629     switch(r = recv(w->fd, buf, sizeof(buf)-1, MSG_TRUNC))
 630     {
 631       case -1:
 632         warn("error reading UNIX domain socket: %s", strerror(errno));
 633         luaA_cs_cleanup();
 634         break;
 635       case 0:
 636         break;
 637       default:
 638         if(r >= ssizeof(buf))
 639             break;
 640         buf[r] = '\0';
 641         luaA_docmd(buf);
 642     }
 643     layout_refresh();
 644     statusbar_refresh();
 645     titlebar_refresh();
 646 }
 647
 648 void
 649 luaA_cs_init(void)
 650 {
 651     int csfd = socket_getclient();
 652
 653     if (csfd < 0)
 654         return;
 655     addr = socket_getaddr(getenv("DISPLAY"));
 656
 657     if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
 658     {
 659         if(errno == EADDRINUSE)
 660         {
 661             if(unlink(addr->sun_path))
 662                 warn("error unlinking existing file: %s", strerror(errno));
 663             if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
 664                 warn("error binding UNIX domain socket: %s", strerror(errno));
 665         }
 666         else
 667             warn("error binding UNIX domain socket: %s", strerror(errno));
 668     }
 669     ev_io_init(&csio, &luaA_cb, csfd, EV_READ);
 670     ev_io_start(EV_DEFAULT_UC_ &csio);
 671     ev_unref(EV_DEFAULT_UC);
 672 }
 673
 674 void
 675 luaA_cs_cleanup(void)
 676 {
 677     if(csio.fd < 0)
 678         return;
 679     ev_ref(EV_DEFAULT_UC);
 680     ev_io_stop(EV_DEFAULT_UC_ &csio);
 681     if (close(csio.fd))
 682         warn("error closing UNIX domain socket: %s", strerror(errno));
 683     if(unlink(addr->sun_path))
 684         warn("error unlinking UNIX domain socket: %s", strerror(errno));
 685     p_delete(&addr);
 686     csio.fd = -1;
 687 }
 688
 689 void
 690 luaA_on_timer(EV_P_ ev_timer *w, int revents)
 691 {
 692     luaA_dofunction(globalconf.L, globalconf.hooks.timer, 0, 0);
 693     layout_refresh();
 694     statusbar_refresh();
 695     titlebar_refresh();
 696 }
 697
 698 void
 699 luaA_pushcolor(lua_State *L, const xcolor_t *c)
 700 {
 701     uint8_t r = (unsigned)c->red   * 0xff / 0xffff;
 702     uint8_t g = (unsigned)c->green * 0xff / 0xffff;
 703     uint8_t b = (unsigned)c->blue  * 0xff / 0xffff;
 704     uint8_t a = (unsigned)c->alpha * 0xff / 0xffff;
 705     char s[10];
 706     snprintf(s, sizeof(s), "#%02x%02x%02x%02x", r, g, b, a);
 707     lua_pushlstring(L, s, sizeof(s));
 708 }