scrotwm.c

   1 /* $scrotwm$ */
   2 /*
   3  * Copyright (c) 2009 Marco Peereboom <marco@peereboom.us>
   4  * Copyright (c) 2009 Ryan McBride <mcbride@countersiege.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 /*
  19  * Much code and ideas taken from dwm under the following license:
  20  * MIT/X Consortium License
  21  *
  22  * 2006-2008 Anselm R Garbe <garbeam at gmail dot com>
  23  * 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
  24  * 2006-2007 Jukka Salmi <jukka at salmi dot ch>
  25  * 2007 Premysl Hruby <dfenze at gmail dot com>
  26  * 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
  27  * 2007 Christof Musik <christof at sendfax dot de>
  28  * 2007-2008 Enno Gottox Boland <gottox at s01 dot de>
  29  * 2007-2008 Peter Hartlich <sgkkr at hartlich dot com>
  30  * 2008 Martin Hurton <martin dot hurton at gmail dot com>
  31  *
  32  * Permission is hereby granted, free of charge, to any person obtaining a
  33  * copy of this software and associated documentation files (the "Software"),
  34  * to deal in the Software without restriction, including without limitation
  35  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  36  * and/or sell copies of the Software, and to permit persons to whom the
  37  * Software is furnished to do so, subject to the following conditions:
  38  *
  39  * The above copyright notice and this permission notice shall be included in
  40  * all copies or substantial portions of the Software.
  41  *
  42  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  43  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  44  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  45  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  46  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  47  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  48  * DEALINGS IN THE SOFTWARE.
  49  */
  50
  51 #define SWM_VERSION     "0.5"
  52
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <err.h>
  56 #include <locale.h>
  57 #include <unistd.h>
  58 #include <time.h>
  59 #include <signal.h>
  60 #include <string.h>
  61 #include <util.h>
  62 #include <pwd.h>
  63
  64 #include <sys/types.h>
  65 #include <sys/stat.h>
  66 #include <sys/wait.h>
  67 #include <sys/queue.h>
  68 #include <sys/param.h>
  69
  70 #include <X11/cursorfont.h>
  71 #include <X11/keysym.h>
  72 #include <X11/Xatom.h>
  73 #include <X11/Xlib.h>
  74 #include <X11/Xproto.h>
  75 #include <X11/Xutil.h>
  76
  77 /* #define SWM_DEBUG */
  78 #ifdef SWM_DEBUG
  79 #define DPRINTF(x...)           do { if (swm_debug) fprintf(stderr, x); } while(0)
  80 #define DNPRINTF(n,x...)        do { if (swm_debug & n) fprintf(stderr, x); } while(0)
  81 #define SWM_D_EVENT             0x0001
  82 #define SWM_D_WS                0x0002
  83 #define SWM_D_FOCUS             0x0004
  84 #define SWM_D_MISC              0x0008
  85
  86 uint32_t                swm_debug = 0
  87                             | SWM_D_EVENT
  88                             | SWM_D_WS
  89                             | SWM_D_FOCUS
  90                             | SWM_D_MISC
  91                             ;
  92 #else
  93 #define DPRINTF(x...)
  94 #define DNPRINTF(n,x...)
  95 #endif
  96
  97 #define LENGTH(x)               (sizeof x / sizeof x[0])
  98 #define MODKEY                  Mod1Mask
  99 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
 100
 101 int                     (*xerrorxlib)(Display *, XErrorEvent *);
 102 int                     other_wm;
 103 int                     screen;
 104 int                     width, height;
 105 int                     running = 1;
 106 int                     ignore_enter = 0;
 107 unsigned int            numlockmask = 0;
 108 unsigned long           color_focus = 0xff0000; /* XXX should this be per ws? */
 109 unsigned long           color_unfocus = 0x888888;
 110 Display                 *display;
 111 Window                  root;
 112
 113 /* status bar */
 114 int                     bar_enabled = 1;
 115 int                     bar_height = 0;
 116 unsigned long           bar_border = 0x008080;
 117 unsigned long           bar_color = 0x000000;
 118 unsigned long           bar_font_color = 0xa0a0a0;
 119 Window                  bar_window;
 120 GC                      bar_gc;
 121 XGCValues               bar_gcv;
 122 XFontStruct             *bar_fs;
 123 char                    bar_text[128];
 124 char                    *bar_fonts[] = {
 125                                 "-*-terminus-*-*-*-*-*-*-*-*-*-*-*-*",
 126                                 "-*-times-medium-r-*-*-*-*-*-*-*-*-*-*",
 127                                 NULL
 128 };
 129
 130 /* terminal + args */
 131 char                            *spawn_term[] = { "xterm", NULL };
 132
 133 struct ws_win {
 134         TAILQ_ENTRY(ws_win)     entry;
 135         Window                  id;
 136         int                     x;
 137         int                     y;
 138         int                     width;
 139         int                     height;
 140 };
 141
 142 TAILQ_HEAD(ws_win_list, ws_win);
 143
 144 /* define work spaces */
 145 #define SWM_WS_MAX              (10)
 146 struct workspace {
 147         int                     visible;        /* workspace visible */
 148         int                     restack;        /* restack on switch */
 149         struct ws_win           *focus;         /* which win has focus */
 150         int                     winno;          /* total nr of windows */
 151         struct ws_win_list      winlist;        /* list of windows in ws */
 152 } ws[SWM_WS_MAX];
 153 int                     current_ws = 0;
 154
 155 /* args to functions */
 156 union arg {
 157         int                     id;
 158 #define SWM_ARG_ID_FOCUSNEXT    (0)
 159 #define SWM_ARG_ID_FOCUSPREV    (1)
 160 #define SWM_ARG_ID_FOCUSMAIN    (2)
 161         char                    **argv;
 162 };
 163
 164
 165 void    stack(void);
 166
 167 #define SWM_CONF_WS     "\n= \t"
 168 #define SWM_CONF_FILE   "scrotwm.conf"
 169 int
 170 conf_load(char *filename)
 171 {
 172         FILE                    *config;
 173         char                    *line, *cp, *var, *val;
 174         size_t                   len, lineno = 0;
 175
 176         DNPRINTF(SWM_D_MISC, "conf_load: filename %s\n", filename);
 177
 178         if (filename == NULL)
 179                 return (1);
 180
 181         if ((config = fopen(filename, "r")) == NULL)
 182                 return (1);
 183
 184         for (;;) {
 185                 if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL)
 186                         if (feof(config))
 187                                 break;
 188
 189                 cp = line;
 190                 cp += (long)strspn(cp, SWM_CONF_WS);
 191                 if (cp[0] == '\0') {
 192                         /* empty line */
 193                         free(line);
 194                         continue;
 195                 }
 196
 197                 if ((var = strsep(&cp, SWM_CONF_WS)) == NULL || cp == NULL)
 198                         break;
 199
 200                 cp += (long)strspn(cp, SWM_CONF_WS);
 201                 if ((val = strsep(&cp, SWM_CONF_WS)) == NULL)
 202                         break;
 203
 204                 DNPRINTF(SWM_D_MISC, "conf_load: %s=%s\n",var ,val);
 205                 switch (var[0]) {
 206                 case 'b':
 207                         if (!strncmp(var, "bar_enabled", strlen("bar_enabled")))
 208                                 bar_enabled = atoi(val);
 209                         else if (!strncmp(var, "bar_border",
 210                             strlen("bar_border")))
 211                                 bar_border = strtol(val, NULL, 16);
 212                         else if (!strncmp(var, "bar_color",
 213                             strlen("bar_color")))
 214                                 bar_color = strtol(val, NULL, 16);
 215                         else if (!strncmp(var, "bar_font_color",
 216                             strlen("bar_font_color")))
 217                                 bar_font_color = strtol(val, NULL, 16);
 218                         else if (!strncmp(var, "bar_font", strlen("bar_font")))
 219                                 asprintf(&bar_fonts[0], "%s", val);
 220                         else
 221                                 goto bad;
 222                         break;
 223
 224                 case 'c':
 225                         if (!strncmp(var, "color_focus", strlen("color_focus")))
 226                                 color_focus = strtol(val, NULL, 16);
 227                         else if (!strncmp(var, "color_unfocus",
 228                             strlen("color_unfocus")))
 229                                 color_unfocus = strtol(val, NULL, 16);
 230                         else
 231                                 goto bad;
 232                         break;
 233
 234                 case 's':
 235                         if (!strncmp(var, "spawn_term", strlen("spawn_term")))
 236                                 asprintf(&spawn_term[0], "%s", val); /* XXX args? */
 237                         break;
 238                 default:
 239                         goto bad;
 240                 }
 241
 242                 free(line);
 243         }
 244
 245         fclose(config);
 246         return (0);
 247 bad:
 248         errx(1, "invalid conf file entry: %s=%s", var, val);
 249 }
 250
 251 void
 252 bar_print(void)
 253 {
 254         time_t                  tmt;
 255         struct tm               tm;
 256
 257         if (bar_enabled == 0)
 258                 return;
 259
 260         /* clear old text */
 261         XSetForeground(display, bar_gc, bar_color);
 262         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 263             strlen(bar_text));
 264
 265         /* draw new text */
 266         time(&tmt);
 267         localtime_r(&tmt, &tm);
 268         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 269         XSetForeground(display, bar_gc, bar_font_color);
 270         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 271             strlen(bar_text));
 272         XSync(display, False);
 273
 274         alarm(60);
 275 }
 276
 277 void
 278 bar_signal(int sig)
 279 {
 280         /* XXX yeah yeah byte me */
 281         bar_print();
 282 }
 283
 284 void
 285 bar_toggle(union arg *args)
 286 {
 287         int i;
 288
 289         DNPRINTF(SWM_D_MISC, "bar_toggle\n");
 290
 291         if (bar_enabled) {
 292                 bar_enabled = 0;
 293                 height += bar_height; /* correct screen height */
 294                 XUnmapWindow(display, bar_window);
 295         } else {
 296                 bar_enabled = 1;
 297                 height -= bar_height; /* correct screen height */
 298                 XMapWindow(display, bar_window);
 299         }
 300         XSync(display, False);
 301         for (i = 0; i < SWM_WS_MAX; i++)
 302                 ws[i].restack = 1;
 303
 304         stack();
 305         bar_print(); /* must be after stack */
 306 }
 307
 308 void
 309 bar_setup(void)
 310 {
 311         int                     i;
 312
 313         for (i = 0; bar_fonts[i] != NULL; i++) {
 314                 bar_fs = XLoadQueryFont(display, bar_fonts[i]);
 315                 if (bar_fs)
 316                         break;
 317         }
 318         if (bar_fonts[i] == NULL)
 319                         errx(1, "couldn't load font");
 320         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 321
 322         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 323             bar_height - 2, 1, bar_border, bar_color);
 324         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 325         XSetFont(display, bar_gc, bar_fs->fid);
 326         if (bar_enabled) {
 327                 height -= bar_height; /* correct screen height */
 328                 XMapWindow(display, bar_window);
 329         }
 330
 331         if (signal(SIGALRM, bar_signal) == SIG_ERR)
 332                 err(1, "could not install bar_signal");
 333         bar_print();
 334 }
 335
 336 void
 337 quit(union arg *args)
 338 {
 339         DNPRINTF(SWM_D_MISC, "quit\n");
 340         running = 0;
 341 }
 342
 343 void
 344 spawn(union arg *args)
 345 {
 346         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 347         /*
 348          * The double-fork construct avoids zombie processes and keeps the code
 349          * clean from stupid signal handlers.
 350          */
 351         if(fork() == 0) {
 352                 if(fork() == 0) {
 353                         if(display)
 354                                 close(ConnectionNumber(display));
 355                         setsid();
 356                         execvp(args->argv[0], args->argv);
 357                         fprintf(stderr, "execvp failed\n");
 358                         perror(" failed");
 359                 }
 360                 exit(0);
 361         }
 362         wait(0);
 363 }
 364
 365 void
 366 focus_win(struct ws_win *win)
 367 {
 368         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %lu\n", win->id);
 369         XSetWindowBorder(display, win->id, color_focus);
 370         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 371         ws[current_ws].focus = win;
 372 }
 373
 374 void
 375 unfocus_win(struct ws_win *win)
 376 {
 377         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %lu\n", win->id);
 378         XSetWindowBorder(display, win->id, color_unfocus);
 379         if (ws[current_ws].focus == win)
 380                 ws[current_ws].focus = NULL;
 381 }
 382
 383 void
 384 switchws(union arg *args)
 385 {
 386         int                     wsid = args->id;
 387         struct ws_win           *win;
 388
 389         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 390
 391         if (wsid == current_ws)
 392                 return;
 393
 394         /* map new window first to prevent ugly blinking */
 395         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 396                 XMapWindow(display, win->id);
 397         ws[wsid].visible = 1;
 398
 399         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 400                 XUnmapWindow(display, win->id);
 401         ws[current_ws].visible = 0;
 402
 403         current_ws = wsid;
 404
 405         ignore_enter = 1;
 406         if (ws[wsid].restack) {
 407                 stack();
 408                 bar_print();
 409         } else {
 410                 if (ws[wsid].focus != NULL)
 411                         focus_win(ws[wsid].focus);
 412                 XSync(display, False);
 413         }
 414 }
 415
 416 void
 417 focus(union arg *args)
 418 {
 419         struct ws_win           *winfocus, *winlostfocus;
 420
 421         DNPRINTF(SWM_D_FOCUS, "focus: id %d\n", args->id);
 422         if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
 423                 return;
 424
 425         winlostfocus = ws[current_ws].focus;
 426
 427         switch (args->id) {
 428         case SWM_ARG_ID_FOCUSPREV:
 429                 ws[current_ws].focus =
 430                     TAILQ_PREV(ws[current_ws].focus, ws_win_list, entry);
 431                 if (ws[current_ws].focus == NULL)
 432                         ws[current_ws].focus =
 433                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 434                 break;
 435
 436         case SWM_ARG_ID_FOCUSNEXT:
 437                 ws[current_ws].focus = TAILQ_NEXT(ws[current_ws].focus, entry);
 438                 if (ws[current_ws].focus == NULL)
 439                         ws[current_ws].focus =
 440                             TAILQ_FIRST(&ws[current_ws].winlist);
 441                 break;
 442
 443         case SWM_ARG_ID_FOCUSMAIN:
 444                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 445                 break;
 446
 447         default:
 448                 return;
 449         }
 450
 451         winfocus = ws[current_ws].focus;
 452         unfocus_win(winlostfocus);
 453         focus_win(winfocus);
 454         XSync(display, False);
 455 }
 456
 457 /* I know this sucks but it works well enough */
 458 void
 459 stack(void)
 460 {
 461         XWindowChanges          wc;
 462         struct ws_win           wf, *win, *winfocus = &wf;
 463         int                     i, h, w, x, y, hrh;
 464
 465         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 466
 467         winfocus->id = root;
 468
 469         ws[current_ws].restack = 0;
 470
 471         if (ws[current_ws].winno == 0)
 472                 return;
 473
 474         if (ws[current_ws].winno > 1)
 475                 w = width / 2;
 476         else
 477                 w = width;
 478
 479         if (ws[current_ws].winno > 2)
 480                 hrh = height / (ws[current_ws].winno - 1);
 481         else
 482                 hrh = 0;
 483
 484         x = 0;
 485         y = bar_enabled ? bar_height : 0;
 486         h = height;
 487         i = 0;
 488         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 489                 if (i == 1) {
 490                         x += w + 2;
 491                         w -= 2;
 492                 }
 493                 if (i != 0 && hrh != 0) {
 494                         /* correct the last window for lost pixels */
 495                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 496                             ws_win_list)) {
 497                                 h = height - (i * hrh);
 498                                 if (h == 0)
 499                                         h = hrh;
 500                                 else
 501                                         h += hrh;
 502                                 y += hrh;
 503                         } else {
 504                                 h = hrh - 2;
 505                                 /* leave first right hand window at y = 0 */
 506                                 if (i > 1)
 507                                         y += h + 2;
 508                         }
 509                 }
 510
 511                 bzero(&wc, sizeof wc);
 512                 win->x = wc.x = x;
 513                 win->y = wc.y = y;
 514                 win->width = wc.width = w;
 515                 win->height = wc.height = h;
 516                 wc.border_width = 1;
 517                 XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
 518                     CWHeight | CWBorderWidth, &wc);
 519                 if (win == ws[current_ws].focus)
 520                         winfocus = win;
 521                 else
 522                         unfocus_win(win);
 523                 XMapWindow(display, win->id);
 524                 i++;
 525         }
 526
 527         focus_win(winfocus); /* this has to be done outside of the loop */
 528         XSync(display, False);
 529 }
 530
 531 void
 532 swap_to_main(union arg *args)
 533 {
 534         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 535
 536         DNPRINTF(SWM_D_MISC, "swap_to_main: win: %lu\n",
 537             ws[current_ws].focus ? ws[current_ws].focus->id : 0);
 538
 539         if (ws[current_ws].focus == NULL || ws[current_ws].focus == tmpwin)
 540                 return;
 541
 542         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 543         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 544             tmpwin, entry);
 545         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 546         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 547         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 548         ignore_enter = 2;
 549         stack();
 550 }
 551
 552 void
 553 send_to_ws(union arg *args)
 554 {
 555         int                     wsid = args->id;
 556         struct ws_win           *win = ws[current_ws].focus;
 557
 558         DNPRINTF(SWM_D_WS, "send_to_ws: win: %lu\n", win->id);
 559
 560         XUnmapWindow(display, win->id);
 561
 562         /* find a window to focus */
 563         ws[current_ws].focus = TAILQ_PREV(win, ws_win_list,entry);
 564         if (ws[current_ws].focus == NULL)
 565                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 566
 567         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 568         ws[current_ws].winno--;
 569
 570         TAILQ_INSERT_TAIL(&ws[wsid].winlist, win, entry);
 571         if (ws[wsid].winno == 0)
 572                 ws[wsid].focus = win;
 573         ws[wsid].winno++;
 574         ws[wsid].restack = 1;
 575
 576         stack();
 577 }
 578
 579 /* key definitions */
 580 struct key {
 581         unsigned int            mod;
 582         KeySym                  keysym;
 583         void                    (*func)(union arg *);
 584         union arg               args;
 585 } keys[] = {
 586         /* modifier             key     function                argument */
 587         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 588         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = spawn_term } },
 589         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 590         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 591         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 592         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 593         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 594         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 595         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 596         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 597         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 598         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 599         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 600         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 601         { MODKEY | ShiftMask,   XK_1,           send_to_ws,     {.id = 0} },
 602         { MODKEY | ShiftMask,   XK_2,           send_to_ws,     {.id = 1} },
 603         { MODKEY | ShiftMask,   XK_3,           send_to_ws,     {.id = 2} },
 604         { MODKEY | ShiftMask,   XK_4,           send_to_ws,     {.id = 3} },
 605         { MODKEY | ShiftMask,   XK_5,           send_to_ws,     {.id = 4} },
 606         { MODKEY | ShiftMask,   XK_6,           send_to_ws,     {.id = 5} },
 607         { MODKEY | ShiftMask,   XK_7,           send_to_ws,     {.id = 6} },
 608         { MODKEY | ShiftMask,   XK_8,           send_to_ws,     {.id = 7} },
 609         { MODKEY | ShiftMask,   XK_9,           send_to_ws,     {.id = 8} },
 610         { MODKEY | ShiftMask,   XK_0,           send_to_ws,     {.id = 9} },
 611         { MODKEY,               XK_b,           bar_toggle,     {0} },
 612         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 613         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 614 };
 615
 616 void
 617 updatenumlockmask(void)
 618 {
 619         unsigned int            i, j;
 620         XModifierKeymap         *modmap;
 621
 622         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 623         numlockmask = 0;
 624         modmap = XGetModifierMapping(display);
 625         for (i = 0; i < 8; i++)
 626                 for (j = 0; j < modmap->max_keypermod; j++)
 627                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 628                           == XKeysymToKeycode(display, XK_Num_Lock))
 629                                 numlockmask = (1 << i);
 630
 631         XFreeModifiermap(modmap);
 632 }
 633
 634 void
 635 grabkeys(void)
 636 {
 637         unsigned int            i, j;
 638         KeyCode                 code;
 639         unsigned int            modifiers[] =
 640             { 0, LockMask, numlockmask, numlockmask | LockMask };
 641
 642         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 643         updatenumlockmask();
 644
 645         XUngrabKey(display, AnyKey, AnyModifier, root);
 646         for(i = 0; i < LENGTH(keys); i++) {
 647                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 648                         for(j = 0; j < LENGTH(modifiers); j++)
 649                                 XGrabKey(display, code,
 650                                     keys[i].mod | modifiers[j], root,
 651                                     True, GrabModeAsync, GrabModeAsync);
 652         }
 653 }
 654 void
 655 expose(XEvent *e)
 656 {
 657         DNPRINTF(SWM_D_EVENT, "expose: window: %lu\n", e->xexpose.window);
 658 }
 659
 660 void
 661 keypress(XEvent *e)
 662 {
 663         unsigned int            i;
 664         KeySym                  keysym;
 665         XKeyEvent               *ev = &e->xkey;
 666
 667         DNPRINTF(SWM_D_EVENT, "keypress: window: %lu\n", ev->window);
 668
 669         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 670         for(i = 0; i < LENGTH(keys); i++)
 671                 if(keysym == keys[i].keysym
 672                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 673                    && keys[i].func)
 674                         keys[i].func(&(keys[i].args));
 675 }
 676
 677 void
 678 buttonpress(XEvent *e)
 679 {
 680         XButtonPressedEvent     *ev = &e->xbutton;
 681 #ifdef SWM_CLICKTOFOCUS
 682         struct ws_win           *win;
 683 #endif
 684
 685
 686         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %lu\n", ev->window);
 687
 688         if (ev->window == root)
 689                 return;
 690         if (ev->window == ws[current_ws].focus->id)
 691                 return;
 692 #ifdef SWM_CLICKTOFOCUS
 693         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 694                 if (win->id == ev->window) {
 695                         /* focus in the clicked window */
 696                         XSetWindowBorder(display, ev->window, 0xff0000);
 697                         XSetWindowBorder(display,
 698                             ws[current_ws].focus->id, 0x888888);
 699                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 700                             CurrentTime);
 701                         ws[current_ws].focus = win;
 702                         XSync(display, False);
 703                         break;
 704         }
 705 #endif
 706 }
 707
 708 void
 709 configurerequest(XEvent *e)
 710 {
 711         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 712         struct ws_win           *win;
 713
 714         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %lu\n", ev->window);
 715
 716         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 717             FocusChangeMask);
 718
 719         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 720                 errx(1, "calloc: failed to allocate memory for new window");
 721
 722         win->id = ev->window;
 723         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 724         ws[current_ws].focus = win; /* make new win focused */
 725         ws[current_ws].winno++;
 726         stack();
 727 }
 728
 729 void
 730 configurenotify(XEvent *e)
 731 {
 732         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %lu\n",
 733             e->xconfigure.window);
 734 }
 735
 736 void
 737 destroynotify(XEvent *e)
 738 {
 739         struct ws_win           *win;
 740         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 741
 742         DNPRINTF(SWM_D_EVENT, "destroynotify: window %lu\n", ev->window);
 743
 744         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 745                 if (ev->window == win->id) {
 746                         /* find a window to focus */
 747                         ws[current_ws].focus =
 748                             TAILQ_PREV(win, ws_win_list,entry);
 749                         if (ws[current_ws].focus == NULL)
 750                                 ws[current_ws].focus =
 751                                     TAILQ_FIRST(&ws[current_ws].winlist);
 752
 753                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 754                         free(win);
 755                         ws[current_ws].winno--;
 756                         break;
 757                 }
 758         }
 759
 760         stack();
 761 }
 762
 763 void
 764 enternotify(XEvent *e)
 765 {
 766         XCrossingEvent          *ev = &e->xcrossing;
 767         struct ws_win           *win;
 768
 769         DNPRINTF(SWM_D_EVENT, "enternotify: window: %lu\n", ev->window);
 770
 771         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 772             ev->window != root)
 773                 return;
 774         if (ignore_enter) {
 775                 /* eat event(s) to prevent autofocus */
 776                 ignore_enter--;
 777                 return;
 778         }
 779         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 780                 if (win->id == ev->window)
 781                         focus_win(win);
 782                 else
 783                         unfocus_win(win);
 784         }
 785 }
 786
 787 void
 788 focusin(XEvent *e)
 789 {
 790         XFocusChangeEvent       *ev = &e->xfocus;
 791
 792         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu\n", ev->window);
 793
 794         if (ev->window == root)
 795                 return;
 796
 797         /*
 798          * kill grab for now so that we can cut and paste , this screws up
 799          * click to focus
 800          */
 801         /*
 802         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu grabbing\n", ev->window);
 803         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 804             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 805         */
 806 }
 807
 808 void
 809 mappingnotify(XEvent *e)
 810 {
 811         XMappingEvent           *ev = &e->xmapping;
 812
 813         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %lu\n", ev->window);
 814
 815         XRefreshKeyboardMapping(ev);
 816         if(ev->request == MappingKeyboard)
 817                 grabkeys();
 818 }
 819
 820 void
 821 maprequest(XEvent *e)
 822 {
 823         DNPRINTF(SWM_D_EVENT, "maprequest: window: %lu\n",
 824             e->xmaprequest.window);
 825 }
 826
 827 void
 828 propertynotify(XEvent *e)
 829 {
 830         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %lu\n",
 831             e->xproperty.window);
 832 }
 833
 834 void
 835 unmapnotify(XEvent *e)
 836 {
 837         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %lu\n", e->xunmap.window);
 838 }
 839
 840 void                    (*handler[LASTEvent])(XEvent *) = {
 841                                 [Expose] = expose,
 842                                 [KeyPress] = keypress,
 843                                 [ButtonPress] = buttonpress,
 844                                 [ConfigureRequest] = configurerequest,
 845                                 [ConfigureNotify] = configurenotify,
 846                                 [DestroyNotify] = destroynotify,
 847                                 [EnterNotify] = enternotify,
 848                                 [FocusIn] = focusin,
 849                                 [MappingNotify] = mappingnotify,
 850                                 [MapRequest] = maprequest,
 851                                 [PropertyNotify] = propertynotify,
 852                                 [UnmapNotify] = unmapnotify,
 853 };
 854
 855 int
 856 xerror_start(Display *d, XErrorEvent *ee)
 857 {
 858         other_wm = 1;
 859         return (-1);
 860 }
 861
 862 int
 863 xerror(Display *d, XErrorEvent *ee)
 864 {
 865         fprintf(stderr, "error: %p %p\n", display, ee);
 866
 867         return (-1);
 868 }
 869
 870 int
 871 active_wm(void)
 872 {
 873         other_wm = 0;
 874         xerrorxlib = XSetErrorHandler(xerror_start);
 875
 876         /* this causes an error if some other window manager is running */
 877         XSelectInput(display, DefaultRootWindow(display),
 878             SubstructureRedirectMask);
 879         XSync(display, False);
 880         if(other_wm)
 881                 return (1);
 882
 883         XSetErrorHandler(xerror);
 884         XSync(display, False);
 885         return (0);
 886 }
 887
 888 int
 889 main(int argc, char *argv[])
 890 {
 891         struct passwd           *pwd;
 892         char                    conf[PATH_MAX], *cfile = NULL;
 893         struct stat             sb;
 894         XEvent                  e;
 895         int                     i;
 896
 897         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 898         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 899                 warnx("no locale support");
 900
 901         if(!(display = XOpenDisplay(0)))
 902                 errx(1, "can not open display");
 903
 904         if (active_wm())
 905                 errx(1, "other wm running");
 906
 907         screen = DefaultScreen(display);
 908         root = RootWindow(display, screen);
 909         width = DisplayWidth(display, screen) - 2;
 910         height = DisplayHeight(display, screen) - 2;
 911
 912         /* look for local and globale conf file */
 913         pwd = getpwuid(getuid());
 914         if (pwd == NULL)
 915                 errx(1, "invalid user %d", getuid());
 916
 917         snprintf(conf, sizeof conf, "%s/.%s", pwd->pw_dir, SWM_CONF_FILE);
 918         if (stat(conf, &sb) != -1) {
 919                 if (S_ISREG(sb.st_mode))
 920                         cfile = conf;
 921         } else {
 922                 /* try global conf file */
 923                 snprintf(conf, sizeof conf, "/etc/%s", SWM_CONF_FILE);
 924                 if (!stat(conf, &sb))
 925                         if (S_ISREG(sb.st_mode))
 926                                 cfile = conf;
 927         }
 928         if (cfile)
 929                 conf_load(cfile);
 930
 931         /* make work space 1 active */
 932         ws[0].visible = 1;
 933         ws[0].restack = 0;
 934         ws[0].focus = NULL;
 935         ws[0].winno = 0;
 936         TAILQ_INIT(&ws[0].winlist);
 937         for (i = 1; i < SWM_WS_MAX; i++) {
 938                 ws[i].visible = 0;
 939                 ws[i].restack = 0;
 940                 ws[i].focus = NULL;
 941                 ws[i].winno = 0;
 942                 TAILQ_INIT(&ws[i].winlist);
 943         }
 944
 945         /* setup status bar */
 946         bar_setup();
 947
 948         XSelectInput(display, root, SubstructureRedirectMask |
 949             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 950             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 951             FocusChangeMask | PropertyChangeMask);
 952
 953         grabkeys();
 954
 955         while (running) {
 956                 XNextEvent(display, &e);
 957                 if (handler[e.type])
 958                         handler[e.type](&e);
 959         }
 960
 961         XCloseDisplay(display);
 962
 963         return (0);
 964 }