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 char                            *spawn_menu[] = { "dmenu_run", NULL };
 133
 134 struct ws_win {
 135         TAILQ_ENTRY(ws_win)     entry;
 136         Window                  id;
 137         int                     x;
 138         int                     y;
 139         int                     width;
 140         int                     height;
 141         int                     floating;
 142         int                     transient;
 143 };
 144
 145 TAILQ_HEAD(ws_win_list, ws_win);
 146
 147 /* define work spaces */
 148 #define SWM_WS_MAX              (10)
 149 struct workspace {
 150         int                     visible;        /* workspace visible */
 151         int                     restack;        /* restack on switch */
 152         struct ws_win           *focus;         /* which win has focus */
 153         struct ws_win_list      winlist;        /* list of windows in ws */
 154 } ws[SWM_WS_MAX];
 155 int                     current_ws = 0;
 156
 157 /* args to functions */
 158 union arg {
 159         int                     id;
 160 #define SWM_ARG_ID_FOCUSNEXT    (0)
 161 #define SWM_ARG_ID_FOCUSPREV    (1)
 162 #define SWM_ARG_ID_FOCUSMAIN    (2)
 163         char                    **argv;
 164 };
 165
 166
 167 void    stack(void);
 168
 169 #define SWM_CONF_WS     "\n= \t"
 170 #define SWM_CONF_FILE   "scrotwm.conf"
 171 int
 172 conf_load(char *filename)
 173 {
 174         FILE                    *config;
 175         char                    *line, *cp, *var, *val;
 176         size_t                   len, lineno = 0;
 177
 178         DNPRINTF(SWM_D_MISC, "conf_load: filename %s\n", filename);
 179
 180         if (filename == NULL)
 181                 return (1);
 182
 183         if ((config = fopen(filename, "r")) == NULL)
 184                 return (1);
 185
 186         for (;;) {
 187                 if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL)
 188                         if (feof(config))
 189                                 break;
 190                 cp = line;
 191                 cp += (long)strspn(cp, SWM_CONF_WS);
 192                 if (cp[0] == '\0') {
 193                         /* empty line */
 194                         free(line);
 195                         continue;
 196                 }
 197                 if ((var = strsep(&cp, SWM_CONF_WS)) == NULL || cp == NULL)
 198                         break;
 199                 cp += (long)strspn(cp, SWM_CONF_WS);
 200                 if ((val = strsep(&cp, SWM_CONF_WS)) == NULL)
 201                         break;
 202
 203                 DNPRINTF(SWM_D_MISC, "conf_load: %s=%s\n",var ,val);
 204                 switch (var[0]) {
 205                 case 'b':
 206                         if (!strncmp(var, "bar_enabled", strlen("bar_enabled")))
 207                                 bar_enabled = atoi(val);
 208                         else if (!strncmp(var, "bar_border",
 209                             strlen("bar_border")))
 210                                 bar_border = strtol(val, NULL, 16);
 211                         else if (!strncmp(var, "bar_color",
 212                             strlen("bar_color")))
 213                                 bar_color = strtol(val, NULL, 16);
 214                         else if (!strncmp(var, "bar_font_color",
 215                             strlen("bar_font_color")))
 216                                 bar_font_color = strtol(val, NULL, 16);
 217                         else if (!strncmp(var, "bar_font", strlen("bar_font")))
 218                                 asprintf(&bar_fonts[0], "%s", val);
 219                         else
 220                                 goto bad;
 221                         break;
 222
 223                 case 'c':
 224                         if (!strncmp(var, "color_focus", strlen("color_focus")))
 225                                 color_focus = strtol(val, NULL, 16);
 226                         else if (!strncmp(var, "color_unfocus",
 227                             strlen("color_unfocus")))
 228                                 color_unfocus = strtol(val, NULL, 16);
 229                         else
 230                                 goto bad;
 231                         break;
 232
 233                 case 's':
 234                         if (!strncmp(var, "spawn_term", strlen("spawn_term")))
 235                                 asprintf(&spawn_term[0], "%s", val); /* XXX args? */
 236                         break;
 237                 default:
 238                         goto bad;
 239                 }
 240                 free(line);
 241         }
 242
 243         fclose(config);
 244         return (0);
 245 bad:
 246         errx(1, "invalid conf file entry: %s=%s", var, val);
 247 }
 248
 249 void
 250 bar_print(void)
 251 {
 252         time_t                  tmt;
 253         struct tm               tm;
 254
 255         if (bar_enabled == 0)
 256                 return;
 257
 258         /* clear old text */
 259         XSetForeground(display, bar_gc, bar_color);
 260         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 261             strlen(bar_text));
 262
 263         /* draw new text */
 264         time(&tmt);
 265         localtime_r(&tmt, &tm);
 266         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 267         XSetForeground(display, bar_gc, bar_font_color);
 268         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 269             strlen(bar_text));
 270         XSync(display, False);
 271
 272         alarm(60);
 273 }
 274
 275 void
 276 bar_signal(int sig)
 277 {
 278         /* XXX yeah yeah byte me */
 279         bar_print();
 280 }
 281
 282 void
 283 bar_toggle(union arg *args)
 284 {
 285         int i;
 286
 287         DNPRINTF(SWM_D_MISC, "bar_toggle\n");
 288
 289         if (bar_enabled) {
 290                 bar_enabled = 0;
 291                 height += bar_height; /* correct screen height */
 292                 XUnmapWindow(display, bar_window);
 293         } else {
 294                 bar_enabled = 1;
 295                 height -= bar_height; /* correct screen height */
 296                 XMapWindow(display, bar_window);
 297         }
 298         XSync(display, False);
 299         for (i = 0; i < SWM_WS_MAX; i++)
 300                 ws[i].restack = 1;
 301
 302         stack();
 303         bar_print(); /* must be after stack */
 304 }
 305
 306 void
 307 bar_setup(void)
 308 {
 309         int                     i;
 310
 311         for (i = 0; bar_fonts[i] != NULL; i++) {
 312                 bar_fs = XLoadQueryFont(display, bar_fonts[i]);
 313                 if (bar_fs)
 314                         break;
 315         }
 316         if (bar_fonts[i] == NULL)
 317                         errx(1, "couldn't load font");
 318         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 319
 320         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 321             bar_height - 2, 1, bar_border, bar_color);
 322         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 323         XSetFont(display, bar_gc, bar_fs->fid);
 324         XSelectInput(display, bar_window, VisibilityChangeMask);
 325         if (bar_enabled) {
 326                 height -= bar_height; /* correct screen height */
 327                 XMapWindow(display, bar_window);
 328         }
 329         DNPRINTF(SWM_D_MISC, "bar_setup: bar_window %d\n", (int)bar_window);
 330
 331         if (signal(SIGALRM, bar_signal) == SIG_ERR)
 332                 err(1, "could not install bar_signal");
 333         bar_print();
 334 }
 335
 336 int
 337 count_win(int wsid, int count_transient)
 338 {
 339         struct ws_win           *win;
 340         int                     count = 0;
 341
 342         TAILQ_FOREACH (win, &ws[wsid].winlist, entry) {
 343                 if (count_transient == 0 && win->transient)
 344                         continue;
 345                 count++;
 346         }
 347         DNPRINTF(SWM_D_MISC, "count_win: %d\n", count);
 348
 349         return (count);
 350 }
 351 void
 352 quit(union arg *args)
 353 {
 354         DNPRINTF(SWM_D_MISC, "quit\n");
 355         running = 0;
 356 }
 357
 358 void
 359 spawn(union arg *args)
 360 {
 361         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 362         /*
 363          * The double-fork construct avoids zombie processes and keeps the code
 364          * clean from stupid signal handlers.
 365          */
 366         if(fork() == 0) {
 367                 if(fork() == 0) {
 368                         if(display)
 369                                 close(ConnectionNumber(display));
 370                         setsid();
 371                         execvp(args->argv[0], args->argv);
 372                         fprintf(stderr, "execvp failed\n");
 373                         perror(" failed");
 374                 }
 375                 exit(0);
 376         }
 377         wait(0);
 378 }
 379
 380 void
 381 focus_win(struct ws_win *win)
 382 {
 383         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %lu\n", win->id);
 384         XSetWindowBorder(display, win->id, color_focus);
 385         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 386         ws[current_ws].focus = win;
 387 }
 388
 389 void
 390 unfocus_win(struct ws_win *win)
 391 {
 392         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %lu\n", win->id);
 393         XSetWindowBorder(display, win->id, color_unfocus);
 394         if (ws[current_ws].focus == win)
 395                 ws[current_ws].focus = NULL;
 396 }
 397
 398 void
 399 switchws(union arg *args)
 400 {
 401         int                     wsid = args->id;
 402         struct ws_win           *win;
 403
 404         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 405
 406         if (wsid == current_ws)
 407                 return;
 408
 409         /* map new window first to prevent ugly blinking */
 410         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 411                 XMapRaised(display, win->id);
 412         ws[wsid].visible = 1;
 413
 414         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 415                 XUnmapWindow(display, win->id);
 416         ws[current_ws].visible = 0;
 417
 418         current_ws = wsid;
 419
 420         ignore_enter = 1;
 421         if (ws[wsid].restack) {
 422                 stack();
 423                 bar_print();
 424         } else {
 425                 if (ws[wsid].focus != NULL)
 426                         focus_win(ws[wsid].focus);
 427                 XSync(display, False);
 428         }
 429 }
 430
 431 void
 432 focus(union arg *args)
 433 {
 434         struct ws_win           *winfocus, *winlostfocus;
 435
 436         DNPRINTF(SWM_D_FOCUS, "focus: id %d\n", args->id);
 437         if (ws[current_ws].focus == NULL || count_win(current_ws, 1) == 0)
 438                 return;
 439
 440         winlostfocus = ws[current_ws].focus;
 441
 442         switch (args->id) {
 443         case SWM_ARG_ID_FOCUSPREV:
 444                 ws[current_ws].focus =
 445                     TAILQ_PREV(ws[current_ws].focus, ws_win_list, entry);
 446                 if (ws[current_ws].focus == NULL)
 447                         ws[current_ws].focus =
 448                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 449                 break;
 450
 451         case SWM_ARG_ID_FOCUSNEXT:
 452                 ws[current_ws].focus = TAILQ_NEXT(ws[current_ws].focus, entry);
 453                 if (ws[current_ws].focus == NULL)
 454                         ws[current_ws].focus =
 455                             TAILQ_FIRST(&ws[current_ws].winlist);
 456                 break;
 457
 458         case SWM_ARG_ID_FOCUSMAIN:
 459                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 460                 break;
 461
 462         default:
 463                 return;
 464         }
 465
 466         winfocus = ws[current_ws].focus;
 467         unfocus_win(winlostfocus);
 468         focus_win(winfocus);
 469         XSync(display, False);
 470 }
 471
 472 /* I know this sucks but it works well enough */
 473 void
 474 stack(void)
 475 {
 476         XWindowChanges          wc;
 477         struct ws_win           wf, *win, *winfocus = &wf;
 478         int                     i, h, w, x, y, hrh, winno;
 479         int floater = 0;
 480         unsigned int mask;
 481
 482         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 483
 484         winfocus->id = root;
 485
 486         ws[current_ws].restack = 0;
 487
 488         winno = count_win(current_ws, 0);
 489         if (winno == 0)
 490                 return;
 491
 492         if (winno > 1)
 493                 w = width / 2;
 494         else
 495                 w = width;
 496
 497         if (winno > 2)
 498                 hrh = height / (winno - 1);
 499         else
 500                 hrh = 0;
 501
 502         x = 0;
 503         y = bar_enabled ? bar_height : 0;
 504         h = height;
 505         i = 0;
 506         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 507                 if (i == 1) {
 508                         x += w + 2;
 509                         w -= 2;
 510                 }
 511                 if (i != 0 && hrh != 0) {
 512                         /* correct the last window for lost pixels */
 513                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 514                             ws_win_list)) {
 515                                 h = height - (i * hrh);
 516                                 if (h == 0)
 517                                         h = hrh;
 518                                 else
 519                                         h += hrh;
 520                                 y += hrh;
 521                         } else {
 522                                 h = hrh - 2;
 523                                 /* leave first right hand window at y = 0 */
 524                                 if (i > 1)
 525                                         y += h + 2;
 526                         }
 527                 }
 528
 529                 if (win->transient != 0 || win->floating != 0)
 530                         floater = 1;
 531                 else
 532                         floater = 0;
 533
 534                 bzero(&wc, sizeof wc);
 535                 wc.border_width = 1;
 536                 if (floater == 0) {
 537                         win->x = wc.x = x;
 538                         win->y = wc.y = y;
 539                         win->width = wc.width = w;
 540                         win->height = wc.height = h;
 541                         mask = CWX | CWY | CWWidth | CWHeight | CWBorderWidth;
 542                 } else {
 543                         win->x = wc.x = width / 2;
 544                         win->y = wc.y = height / 2;
 545                         mask = CWX | CWY | CWBorderWidth;
 546                 }
 547                 XConfigureWindow(display, win->id, mask, &wc);
 548
 549                 if (win == ws[current_ws].focus)
 550                         winfocus = win;
 551                 else
 552                         unfocus_win(win);
 553                 XMapRaised(display, win->id);
 554                 i++;
 555         }
 556
 557         focus_win(winfocus); /* this has to be done outside of the loop */
 558         XSync(display, False);
 559 }
 560
 561 void
 562 swap_to_main(union arg *args)
 563 {
 564         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 565
 566         DNPRINTF(SWM_D_MISC, "swap_to_main: win: %lu\n",
 567             ws[current_ws].focus ? ws[current_ws].focus->id : 0);
 568
 569         if (ws[current_ws].focus == NULL || ws[current_ws].focus == tmpwin)
 570                 return;
 571
 572         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 573         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 574             tmpwin, entry);
 575         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 576         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 577         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 578         ignore_enter = 2;
 579         stack();
 580 }
 581
 582 void
 583 send_to_ws(union arg *args)
 584 {
 585         int                     wsid = args->id;
 586         struct ws_win           *win = ws[current_ws].focus;
 587
 588         DNPRINTF(SWM_D_WS, "send_to_ws: win: %lu\n", win->id);
 589
 590         XUnmapWindow(display, win->id);
 591
 592         /* find a window to focus */
 593         ws[current_ws].focus = TAILQ_PREV(win, ws_win_list,entry);
 594         if (ws[current_ws].focus == NULL)
 595                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 596
 597         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 598
 599         TAILQ_INSERT_TAIL(&ws[wsid].winlist, win, entry);
 600         if (count_win(wsid, 1) == 0)
 601                 ws[wsid].focus = win;
 602         ws[wsid].restack = 1;
 603
 604         stack();
 605 }
 606
 607 /* key definitions */
 608 struct key {
 609         unsigned int            mod;
 610         KeySym                  keysym;
 611         void                    (*func)(union arg *);
 612         union arg               args;
 613 } keys[] = {
 614         /* modifier             key     function                argument */
 615         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 616         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = spawn_term} },
 617         { MODKEY,               XK_p,           spawn,          {.argv = spawn_menu} },
 618         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 619         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 620         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 621         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 622         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 623         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 624         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 625         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 626         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 627         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 628         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 629         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 630         { MODKEY | ShiftMask,   XK_1,           send_to_ws,     {.id = 0} },
 631         { MODKEY | ShiftMask,   XK_2,           send_to_ws,     {.id = 1} },
 632         { MODKEY | ShiftMask,   XK_3,           send_to_ws,     {.id = 2} },
 633         { MODKEY | ShiftMask,   XK_4,           send_to_ws,     {.id = 3} },
 634         { MODKEY | ShiftMask,   XK_5,           send_to_ws,     {.id = 4} },
 635         { MODKEY | ShiftMask,   XK_6,           send_to_ws,     {.id = 5} },
 636         { MODKEY | ShiftMask,   XK_7,           send_to_ws,     {.id = 6} },
 637         { MODKEY | ShiftMask,   XK_8,           send_to_ws,     {.id = 7} },
 638         { MODKEY | ShiftMask,   XK_9,           send_to_ws,     {.id = 8} },
 639         { MODKEY | ShiftMask,   XK_0,           send_to_ws,     {.id = 9} },
 640         { MODKEY,               XK_b,           bar_toggle,     {0} },
 641         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 642         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 643 };
 644
 645 void
 646 updatenumlockmask(void)
 647 {
 648         unsigned int            i, j;
 649         XModifierKeymap         *modmap;
 650
 651         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 652         numlockmask = 0;
 653         modmap = XGetModifierMapping(display);
 654         for (i = 0; i < 8; i++)
 655                 for (j = 0; j < modmap->max_keypermod; j++)
 656                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 657                           == XKeysymToKeycode(display, XK_Num_Lock))
 658                                 numlockmask = (1 << i);
 659
 660         XFreeModifiermap(modmap);
 661 }
 662
 663 void
 664 grabkeys(void)
 665 {
 666         unsigned int            i, j;
 667         KeyCode                 code;
 668         unsigned int            modifiers[] =
 669             { 0, LockMask, numlockmask, numlockmask | LockMask };
 670
 671         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 672         updatenumlockmask();
 673
 674         XUngrabKey(display, AnyKey, AnyModifier, root);
 675         for(i = 0; i < LENGTH(keys); i++) {
 676                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 677                         for(j = 0; j < LENGTH(modifiers); j++)
 678                                 XGrabKey(display, code,
 679                                     keys[i].mod | modifiers[j], root,
 680                                     True, GrabModeAsync, GrabModeAsync);
 681         }
 682 }
 683 void
 684 expose(XEvent *e)
 685 {
 686         DNPRINTF(SWM_D_EVENT, "expose: window: %lu\n", e->xexpose.window);
 687 }
 688
 689 void
 690 keypress(XEvent *e)
 691 {
 692         unsigned int            i;
 693         KeySym                  keysym;
 694         XKeyEvent               *ev = &e->xkey;
 695
 696         DNPRINTF(SWM_D_EVENT, "keypress: window: %lu\n", ev->window);
 697
 698         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 699         for(i = 0; i < LENGTH(keys); i++)
 700                 if(keysym == keys[i].keysym
 701                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 702                    && keys[i].func)
 703                         keys[i].func(&(keys[i].args));
 704 }
 705
 706 void
 707 buttonpress(XEvent *e)
 708 {
 709         XButtonPressedEvent     *ev = &e->xbutton;
 710 #ifdef SWM_CLICKTOFOCUS
 711         struct ws_win           *win;
 712 #endif
 713
 714
 715         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %lu\n", ev->window);
 716
 717         if (ev->window == root)
 718                 return;
 719         if (ev->window == ws[current_ws].focus->id)
 720                 return;
 721 #ifdef SWM_CLICKTOFOCUS
 722         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 723                 if (win->id == ev->window) {
 724                         /* focus in the clicked window */
 725                         XSetWindowBorder(display, ev->window, 0xff0000);
 726                         XSetWindowBorder(display,
 727                             ws[current_ws].focus->id, 0x888888);
 728                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 729                             CurrentTime);
 730                         ws[current_ws].focus = win;
 731                         XSync(display, False);
 732                         break;
 733         }
 734 #endif
 735 }
 736
 737 void
 738 configurerequest(XEvent *e)
 739 {
 740         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 741         Window                  trans;
 742         struct ws_win           *win;
 743
 744         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %lu\n", ev->window);
 745
 746         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 747                 if (ev->window == win->id)
 748                         return;
 749         }
 750
 751         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 752             FocusChangeMask | ExposureMask);
 753
 754         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 755                 errx(1, "calloc: failed to allocate memory for new window");
 756
 757         win->id = ev->window;
 758         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 759         ws[current_ws].focus = win; /* make new win focused */
 760
 761         XGetTransientForHint(display, win->id, &trans);
 762         if (trans) {
 763                 win->transient = trans;
 764                 DNPRINTF(SWM_D_MISC, "configurerequest: win %u transient %u\n",
 765                     (unsigned)win->id, win->transient);
 766         }
 767 #if 0
 768         XClassHint ch = { 0 };
 769         if(XGetClassHint(display, win->id, &ch)) {
 770                 fprintf(stderr, "class: %s name: %s\n", ch.res_class, ch.res_name);
 771                 if (!strcmp(ch.res_class, "Gvim") && !strcmp(ch.res_name, "gvim")) {
 772                         win->floating = 0;
 773                 }
 774                 if(ch.res_class)
 775                         XFree(ch.res_class);
 776                 if(ch.res_name)
 777                         XFree(ch.res_name);
 778         }
 779 #endif
 780         stack();
 781 }
 782
 783 void
 784 configurenotify(XEvent *e)
 785 {
 786         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %lu\n",
 787             e->xconfigure.window);
 788 }
 789
 790 void
 791 destroynotify(XEvent *e)
 792 {
 793         struct ws_win           *win;
 794         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 795
 796         DNPRINTF(SWM_D_EVENT, "destroynotify: window %lu\n", ev->window);
 797
 798         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 799                 if (ev->window == win->id) {
 800                         /* find a window to focus */
 801                         ws[current_ws].focus =
 802                             TAILQ_PREV(win, ws_win_list,entry);
 803                         if (ws[current_ws].focus == NULL)
 804                                 ws[current_ws].focus =
 805                                     TAILQ_FIRST(&ws[current_ws].winlist);
 806
 807                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 808                         free(win);
 809                         break;
 810                 }
 811         }
 812
 813         stack();
 814 }
 815
 816 void
 817 enternotify(XEvent *e)
 818 {
 819         XCrossingEvent          *ev = &e->xcrossing;
 820         struct ws_win           *win;
 821
 822         DNPRINTF(SWM_D_EVENT, "enternotify: window: %lu\n", ev->window);
 823
 824         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 825             ev->window != root)
 826                 return;
 827         if (ignore_enter) {
 828                 /* eat event(s) to prevent autofocus */
 829                 ignore_enter--;
 830                 return;
 831         }
 832         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 833                 if (win->id == ev->window)
 834                         focus_win(win);
 835                 else
 836                         unfocus_win(win);
 837         }
 838 }
 839
 840 void
 841 focusin(XEvent *e)
 842 {
 843         XFocusChangeEvent       *ev = &e->xfocus;
 844
 845         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu\n", ev->window);
 846
 847         XSync(display, False); /* not sure this helps redrawing graphic apps */
 848
 849         if (ev->window == root)
 850                 return;
 851         /*
 852          * kill grab for now so that we can cut and paste , this screws up
 853          * click to focus
 854          */
 855         /*
 856         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu grabbing\n", ev->window);
 857         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 858             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 859         */
 860 }
 861
 862 void
 863 mappingnotify(XEvent *e)
 864 {
 865         XMappingEvent           *ev = &e->xmapping;
 866
 867         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %lu\n", ev->window);
 868
 869         XRefreshKeyboardMapping(ev);
 870         if(ev->request == MappingKeyboard)
 871                 grabkeys();
 872 }
 873
 874 void
 875 maprequest(XEvent *e)
 876 {
 877         DNPRINTF(SWM_D_EVENT, "maprequest: window: %lu\n",
 878             e->xmaprequest.window);
 879 }
 880
 881 void
 882 propertynotify(XEvent *e)
 883 {
 884         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %lu\n",
 885             e->xproperty.window);
 886 }
 887
 888 void
 889 unmapnotify(XEvent *e)
 890 {
 891         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %lu\n", e->xunmap.window);
 892 }
 893
 894 void
 895 visibilitynotify(XEvent *e)
 896 {
 897         DNPRINTF(SWM_D_EVENT, "visibilitynotify: window: %lu\n", e->xvisibility.window);
 898
 899         if (e->xvisibility.window == bar_window &&
 900             e->xvisibility.state == VisibilityUnobscured)
 901                 bar_print();
 902 }
 903
 904 void                    (*handler[LASTEvent])(XEvent *) = {
 905                                 [Expose] = expose,
 906                                 [KeyPress] = keypress,
 907                                 [ButtonPress] = buttonpress,
 908                                 [ConfigureRequest] = configurerequest,
 909                                 [ConfigureNotify] = configurenotify,
 910                                 [DestroyNotify] = destroynotify,
 911                                 [EnterNotify] = enternotify,
 912                                 [FocusIn] = focusin,
 913                                 [MappingNotify] = mappingnotify,
 914                                 [MapRequest] = maprequest,
 915                                 [PropertyNotify] = propertynotify,
 916                                 [UnmapNotify] = unmapnotify,
 917                                 [VisibilityNotify] = visibilitynotify,
 918 };
 919
 920 int
 921 xerror_start(Display *d, XErrorEvent *ee)
 922 {
 923         other_wm = 1;
 924         return (-1);
 925 }
 926
 927 int
 928 xerror(Display *d, XErrorEvent *ee)
 929 {
 930         fprintf(stderr, "error: %p %p\n", display, ee);
 931
 932         return (-1);
 933 }
 934
 935 int
 936 active_wm(void)
 937 {
 938         other_wm = 0;
 939         xerrorxlib = XSetErrorHandler(xerror_start);
 940
 941         /* this causes an error if some other window manager is running */
 942         XSelectInput(display, DefaultRootWindow(display),
 943             SubstructureRedirectMask);
 944         XSync(display, False);
 945         if(other_wm)
 946                 return (1);
 947
 948         XSetErrorHandler(xerror);
 949         XSync(display, False);
 950         return (0);
 951 }
 952
 953 int
 954 main(int argc, char *argv[])
 955 {
 956         struct passwd           *pwd;
 957         char                    conf[PATH_MAX], *cfile = NULL;
 958         struct stat             sb;
 959         XEvent                  e;
 960         int                     i;
 961
 962         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 963         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 964                 warnx("no locale support");
 965
 966         if(!(display = XOpenDisplay(0)))
 967                 errx(1, "can not open display");
 968
 969         if (active_wm())
 970                 errx(1, "other wm running");
 971
 972         screen = DefaultScreen(display);
 973         root = RootWindow(display, screen);
 974         width = DisplayWidth(display, screen) - 2;
 975         height = DisplayHeight(display, screen) - 2;
 976
 977         /* look for local and global conf file */
 978         pwd = getpwuid(getuid());
 979         if (pwd == NULL)
 980                 errx(1, "invalid user %d", getuid());
 981
 982         snprintf(conf, sizeof conf, "%s/.%s", pwd->pw_dir, SWM_CONF_FILE);
 983         if (stat(conf, &sb) != -1) {
 984                 if (S_ISREG(sb.st_mode))
 985                         cfile = conf;
 986         } else {
 987                 /* try global conf file */
 988                 snprintf(conf, sizeof conf, "/etc/%s", SWM_CONF_FILE);
 989                 if (!stat(conf, &sb))
 990                         if (S_ISREG(sb.st_mode))
 991                                 cfile = conf;
 992         }
 993         if (cfile)
 994                 conf_load(cfile);
 995
 996         /* make work space 1 active */
 997         ws[0].visible = 1;
 998         ws[0].restack = 0;
 999         ws[0].focus = NULL;
1000         TAILQ_INIT(&ws[0].winlist);
1001         for (i = 1; i < SWM_WS_MAX; i++) {
1002                 ws[i].visible = 0;
1003                 ws[i].restack = 0;
1004                 ws[i].focus = NULL;
1005                 TAILQ_INIT(&ws[i].winlist);
1006         }
1007
1008         /* setup status bar */
1009         bar_setup();
1010
1011         XSelectInput(display, root, SubstructureRedirectMask |
1012             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
1013             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
1014             FocusChangeMask | PropertyChangeMask | ExposureMask);
1015
1016         grabkeys();
1017
1018         while (running) {
1019                 XNextEvent(display, &e);
1020                 if (handler[e.type])
1021                         handler[e.type](&e);
1022         }
1023
1024         XCloseDisplay(display);
1025
1026         return (0);
1027 }