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