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
  59 #include <sys/types.h>
  60 #include <sys/wait.h>
  61 #include <sys/queue.h>
  62
  63 #include <X11/cursorfont.h>
  64 #include <X11/keysym.h>
  65 #include <X11/Xatom.h>
  66 #include <X11/Xlib.h>
  67 #include <X11/Xproto.h>
  68 #include <X11/Xutil.h>
  69
  70 /* #define SWM_DEBUG */
  71 #ifdef SWM_DEBUG
  72 #define DPRINTF(x...)           do { if (swm_debug) fprintf(stderr, x); } while(0)
  73 #define DNPRINTF(n,x...)        do { if (swm_debug & n) fprintf(stderr, x); } while(0)
  74 #define SWM_D_EVENT             0x0001
  75 #define SWM_D_WS                0x0002
  76
  77 uint32_t                swm_debug = 0
  78                             | SWM_D_EVENT
  79                             | SWM_D_WS
  80                             ;
  81 #else
  82 #define DPRINTF(x...)
  83 #define DNPRINTF(n,x...)
  84 #endif
  85
  86 #define LENGTH(x)               (sizeof x / sizeof x[0])
  87 #define MODKEY                  Mod1Mask
  88 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  89
  90 int                     (*xerrorxlib)(Display *, XErrorEvent *);
  91 int                     other_wm;
  92 int                     screen;
  93 int                     width, height;
  94 int                     running = 1;
  95 int                     ignore_enter = 0;
  96 unsigned int            numlockmask = 0;
  97 Display                 *display;
  98 Window                  root;
  99
 100 struct ws_win {
 101         TAILQ_ENTRY(ws_win)     entry;
 102         Window                  id;
 103 };
 104
 105 TAILQ_HEAD(ws_win_list, ws_win);
 106
 107 /* define work spaces */
 108 #define SWM_WS_MAX              (10)
 109 struct workspace {
 110         int                      visible;       /* workspace visible */
 111         struct ws_win           *focus;         /* which win has focus */
 112         int                      winno;         /* total nr of windows */
 113         struct ws_win_list       winlist;
 114 } ws[SWM_WS_MAX];
 115 int                     current_ws = 0;
 116
 117 /* args to functions */
 118 union arg {
 119         int             id;
 120 #define SWM_ARG_ID_FOCUSNEXT    (0)
 121 #define SWM_ARG_ID_FOCUSPREV    (1)
 122 #define SWM_ARG_ID_FOCUSMAIN    (2)
 123 };
 124
 125 void
 126 quit(union arg *args)
 127 {
 128         running = 0;
 129 }
 130
 131 void
 132 spawn(union arg *args)
 133 {
 134         char                    *argv[] = { "xterm", NULL }; /* XXX make this in args */
 135
 136         /*
 137          * The double-fork construct avoids zombie processes and keeps the code
 138          * clean from stupid signal handlers.
 139          */
 140         if(fork() == 0) {
 141                 if(fork() == 0) {
 142                         if(display)
 143                                 close(ConnectionNumber(display));
 144                         setsid();
 145                         execvp(argv[0], argv);
 146                         fprintf(stderr, "execvp failed\n");
 147                         perror(" failed");
 148                 }
 149                 exit(0);
 150         }
 151         wait(0);
 152 }
 153
 154 void
 155 focus_win(struct ws_win *win)
 156 {
 157         XSetWindowBorder(display, win->id, 0xff0000);
 158         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 159         ws[current_ws].focus = win;
 160 }
 161
 162 void
 163 unfocus_win(struct ws_win *win)
 164 {
 165         XSetWindowBorder(display, win->id, 0x888888);
 166         if (ws[current_ws].focus == win)
 167                 ws[current_ws].focus = NULL;
 168 }
 169
 170 void
 171 switchws(union arg *args)
 172 {
 173         int                     wsid = args->id;
 174         struct ws_win           *win;
 175         Window                  winfocus;
 176
 177         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 178
 179         if (wsid == current_ws)
 180                 return;
 181
 182         /* map new window first to prevent ugly blinking */
 183         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 184                 XMapWindow(display, win->id);
 185         ws[wsid].visible = 1;
 186
 187         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 188                 XUnmapWindow(display, win->id);
 189         ws[current_ws].visible = 0;
 190
 191         current_ws = wsid;
 192
 193         ignore_enter = 1;
 194         if (ws[wsid].focus != NULL)
 195                 focus_win(ws[wsid].focus);
 196         XSync(display, False);
 197 }
 198
 199 void
 200 focus(union arg *args)
 201 {
 202         struct ws_win           *winfocus, *winlostfocus;
 203
 204         if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
 205                 return;
 206
 207         winlostfocus = ws[current_ws].focus;
 208
 209         switch (args->id) {
 210         case SWM_ARG_ID_FOCUSPREV:
 211                 if (ws[current_ws].focus ==
 212                     TAILQ_FIRST(&ws[current_ws].winlist))
 213                         ws[current_ws].focus =
 214                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 215                 else
 216                         ws[current_ws].focus =TAILQ_PREV(ws[current_ws].focus,
 217                             ws_win_list, entry);
 218                 break;
 219
 220         case SWM_ARG_ID_FOCUSNEXT:
 221                 if (ws[current_ws].focus == TAILQ_LAST(&ws[current_ws].winlist,
 222                     ws_win_list))
 223                         ws[current_ws].focus =
 224                             TAILQ_FIRST(&ws[current_ws].winlist);
 225                 else
 226                         ws[current_ws].focus =
 227                             TAILQ_NEXT(ws[current_ws].focus, entry);
 228                 break;
 229
 230         case SWM_ARG_ID_FOCUSMAIN:
 231                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);;
 232                 break;
 233
 234         default:
 235                 return;
 236         }
 237
 238         winfocus = ws[current_ws].focus;
 239         unfocus_win(winlostfocus);
 240         focus_win(winfocus);
 241         XSync(display, False);
 242 }
 243
 244 /* I know this sucks but it works well enough */
 245 void
 246 stack(void)
 247 {
 248         XWindowChanges          wc;
 249         struct ws_win           wf, *win, *winfocus = &wf;
 250         int                     i, h, w, x, y, winno, hrh;
 251
 252         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 253
 254         winfocus->id = root;
 255
 256         if (ws[current_ws].winno == 0)
 257                 return;
 258
 259         if (ws[current_ws].winno > 1)
 260                 w = width / 2;
 261         else
 262                 w = width;
 263
 264         if (ws[current_ws].winno > 2)
 265                 hrh = height / (ws[current_ws].winno - 1);
 266         else
 267                 hrh = 0;
 268
 269         x = 0;
 270         y = 0;
 271         h = height;
 272         i = 0;
 273         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 274                 if (i == 1) {
 275                         x += w + 2;
 276                         w -= 2;
 277                 }
 278                 if (i != 0 && hrh != 0) {
 279                         /* correct the last window for lost pixels */
 280                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 281                             ws_win_list)) {
 282                                 h = height - (i * hrh);
 283                                 if (h == 0)
 284                                         h = hrh;
 285                                 else
 286                                         h += hrh;
 287                                 y += hrh;
 288                         } else {
 289                                 h = hrh - 2;
 290                                 /* leave first right hand window at y = 0 */
 291                                 if (i > 1)
 292                                         y += h + 2;
 293                         }
 294                 }
 295
 296                 bzero(&wc, sizeof wc);
 297                 wc.x = x;
 298                 wc.y = y;
 299                 wc.width = w;
 300                 wc.height = h;
 301                 wc.border_width = 1;
 302                 XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
 303                     CWHeight | CWBorderWidth, &wc);
 304                 if (win == ws[current_ws].focus)
 305                         winfocus = win;
 306                 else
 307                         unfocus_win(win);
 308                 XMapWindow(display, win->id);
 309                 i++;
 310         }
 311
 312         focus_win(winfocus);
 313         XSync(display, False);
 314 }
 315
 316 void
 317 swap_to_main(union arg *args)
 318 {
 319         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 320
 321         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 322         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 323             tmpwin, entry);
 324         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 325         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 326         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 327         ignore_enter = 2;
 328         stack();
 329 }
 330
 331 /* key definitions */
 332 struct key {
 333         unsigned int            mod;
 334         KeySym                  keysym;
 335         void                    (*func)(union arg *);
 336         union arg               args;
 337 } keys[] = {
 338         /* modifier             key     function                argument */
 339         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 340         { MODKEY | ShiftMask,   XK_Return,      spawn,          {0} },
 341         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 342         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 343         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 344         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 345         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 346         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 347         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 348         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 349         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 350         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 351         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 352         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 353         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 354         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 355 };
 356
 357 void
 358 updatenumlockmask(void)
 359 {
 360         unsigned int            i, j;
 361         XModifierKeymap         *modmap;
 362
 363         numlockmask = 0;
 364         modmap = XGetModifierMapping(display);
 365         for (i = 0; i < 8; i++)
 366                 for (j = 0; j < modmap->max_keypermod; j++)
 367                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 368                           == XKeysymToKeycode(display, XK_Num_Lock))
 369                                 numlockmask = (1 << i);
 370
 371         XFreeModifiermap(modmap);
 372 }
 373
 374 void
 375 grabkeys(void)
 376 {
 377         unsigned int            i, j;
 378         KeyCode                 code;
 379         unsigned int            modifiers[] =
 380             { 0, LockMask, numlockmask, numlockmask | LockMask };
 381
 382         updatenumlockmask();
 383
 384         XUngrabKey(display, AnyKey, AnyModifier, root);
 385         for(i = 0; i < LENGTH(keys); i++) {
 386                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 387                         for(j = 0; j < LENGTH(modifiers); j++)
 388                                 XGrabKey(display, code,
 389                                     keys[i].mod | modifiers[j], root,
 390                                     True, GrabModeAsync, GrabModeAsync);
 391         }
 392 }
 393 void
 394 expose(XEvent *e)
 395 {
 396         XExposeEvent            *ev = &e->xexpose;
 397
 398         DNPRINTF(SWM_D_EVENT, "expose: window: %d\n", ev->window);
 399 }
 400
 401 void
 402 keypress(XEvent *e)
 403 {
 404         unsigned int            i;
 405         KeySym                  keysym;
 406         XKeyEvent               *ev = &e->xkey;
 407
 408         DNPRINTF(SWM_D_EVENT, "keypress: window: %d\n", ev->window);
 409
 410         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 411         for(i = 0; i < LENGTH(keys); i++)
 412                 if(keysym == keys[i].keysym
 413                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 414                    && keys[i].func)
 415                         keys[i].func(&(keys[i].args));
 416 }
 417
 418 void
 419 buttonpress(XEvent *e)
 420 {
 421         XButtonPressedEvent     *ev = &e->xbutton;
 422         struct ws_win           *win;
 423
 424         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %d\n", ev->window);
 425
 426         if (ev->window == root)
 427                 return;
 428         if (ev->window == ws[current_ws].focus->id)
 429                 return;
 430 #if 0
 431         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 432                 if (win->id == ev->window) {
 433                         /* focus in the clicked window */
 434                         XSetWindowBorder(display, ev->window, 0xff0000);
 435                         XSetWindowBorder(display,
 436                             ws[current_ws].focus->id, 0x888888);
 437                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 438                             CurrentTime);
 439                         ws[current_ws].focus = win;
 440                         XSync(display, False);
 441                         break;
 442         }
 443 #endif
 444 }
 445
 446 void
 447 configurerequest(XEvent *e)
 448 {
 449         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 450         struct ws_win           *win;
 451
 452         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %d\n", ev->window);
 453
 454         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 455             FocusChangeMask);
 456
 457         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 458                 errx(1, "calloc: failed to allocate memory for new window");
 459
 460         win->id = ev->window;
 461         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 462         ws[current_ws].focus = win; /* make new win focused */
 463         ws[current_ws].winno++;
 464         stack();
 465 }
 466
 467 void
 468 configurenotify(XEvent *e)
 469 {
 470         XConfigureEvent         *ev = &e->xconfigure;
 471
 472         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %d\n", ev->window);
 473 }
 474
 475 void
 476 destroynotify(XEvent *e)
 477 {
 478         size_t                   sz;
 479         struct ws_win           *win;
 480         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 481
 482         DNPRINTF(SWM_D_EVENT, "destroynotify: window %d\n", ev->window);
 483
 484         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 485                 DNPRINTF(SWM_D_EVENT, "trying: %x\n", win->id);
 486                 if (ev->window == win->id) {
 487                         /* find a window to focus */
 488                         ws[current_ws].focus =
 489                             TAILQ_PREV(win, ws_win_list,entry);
 490                         if (ws[current_ws].focus == NULL)
 491                                 ws[current_ws].focus =
 492                                     TAILQ_FIRST(&ws[current_ws].winlist);
 493
 494                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 495                         free(win);
 496                         ws[current_ws].winno--;
 497                         break;
 498                 }
 499         }
 500
 501         stack();
 502 }
 503
 504 void
 505 enternotify(XEvent *e)
 506 {
 507         XCrossingEvent          *ev = &e->xcrossing;
 508         struct ws_win           *win;
 509
 510         DNPRINTF(SWM_D_EVENT, "enternotify: window: %d\n", ev->window);
 511
 512         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 513             ev->window != root)
 514                 return;
 515         if (ignore_enter) {
 516                 /* eat event(s) to prevent autofocus */
 517                 ignore_enter--;
 518                 return;
 519         }
 520         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 521                 if (win->id == ev->window)
 522                         focus_win(win);
 523                 else
 524                         unfocus_win(win);
 525         }
 526 }
 527
 528 void
 529 focusin(XEvent *e)
 530 {
 531         XFocusChangeEvent       *ev = &e->xfocus;
 532
 533         DNPRINTF(SWM_D_EVENT, "focusin: window: %d\n", ev->window);
 534
 535         if (ev->window == root)
 536                 return;
 537
 538         /*
 539          * kill grab for now so that we can cut and paste , this screws up
 540          * click to focus
 541          */
 542         /*
 543         DNPRINTF(SWM_D_EVENT, "focusin: window: %d grabbing\n", ev->window);
 544         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 545             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 546         */
 547 }
 548
 549 void
 550 mappingnotify(XEvent *e)
 551 {
 552         XMappingEvent           *ev = &e->xmapping;
 553
 554         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %d\n", ev->window);
 555
 556         XRefreshKeyboardMapping(ev);
 557         if(ev->request == MappingKeyboard)
 558                 grabkeys();
 559 }
 560
 561 void
 562 maprequest(XEvent *e)
 563 {
 564         XMapRequestEvent        *ev = &e->xmaprequest;
 565
 566         DNPRINTF(SWM_D_EVENT, "maprequest: window: %d\n", ev->window);
 567 }
 568
 569 void
 570 propertynotify(XEvent *e)
 571 {
 572         XPropertyEvent          *ev = &e->xproperty;
 573
 574         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %d\n", ev->window);
 575 }
 576
 577 void
 578 unmapnotify(XEvent *e)
 579 {
 580         XUnmapEvent             *ev = &e->xunmap;
 581
 582         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %d\n", ev->window);
 583 }
 584
 585 void                    (*handler[LASTEvent])(XEvent *) = {
 586                                 [Expose] = expose,
 587                                 [KeyPress] = keypress,
 588                                 [ButtonPress] = buttonpress,
 589                                 [ConfigureRequest] = configurerequest,
 590                                 [ConfigureNotify] = configurenotify,
 591                                 [DestroyNotify] = destroynotify,
 592                                 [EnterNotify] = enternotify,
 593                                 [FocusIn] = focusin,
 594                                 [MappingNotify] = mappingnotify,
 595                                 [MapRequest] = maprequest,
 596                                 [PropertyNotify] = propertynotify,
 597                                 [UnmapNotify] = unmapnotify,
 598 };
 599
 600 int
 601 xerror_start(Display *d, XErrorEvent *ee)
 602 {
 603         other_wm = 1;
 604         return (-1);
 605 }
 606
 607 int
 608 xerror(Display *d, XErrorEvent *ee)
 609 {
 610         fprintf(stderr, "error: %p %p\n", display, ee);
 611
 612         return (-1);
 613 }
 614
 615 int
 616 active_wm(void)
 617 {
 618         other_wm = 0;
 619         xerrorxlib = XSetErrorHandler(xerror_start);
 620
 621         /* this causes an error if some other window manager is running */
 622         XSelectInput(display, DefaultRootWindow(display),
 623             SubstructureRedirectMask);
 624         XSync(display, False);
 625         if(other_wm)
 626                 return (1);
 627
 628         XSetErrorHandler(xerror);
 629         XSync(display, False);
 630         return (0);
 631 }
 632
 633 int
 634 main(int argc, char *argv[])
 635 {
 636         XEvent                  e;
 637         int                     i;
 638
 639         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 640         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 641                 warnx("no locale support");
 642
 643         if(!(display = XOpenDisplay(0)))
 644                 errx(1, "can not open display");
 645
 646         if (active_wm())
 647                 errx(1, "other wm running");
 648
 649         screen = DefaultScreen(display);
 650         root = RootWindow(display, screen);
 651         width = DisplayWidth(display, screen) - 2;
 652         height = DisplayHeight(display, screen) - 2;
 653
 654         /* make work space 1 active */
 655         ws[0].visible = 1;
 656         ws[0].focus = NULL;
 657         ws[0].winno = 0;
 658         TAILQ_INIT(&ws[0].winlist);
 659         for (i = 1; i < SWM_WS_MAX; i++) {
 660                 ws[i].visible = 0;
 661                 ws[i].focus = NULL;
 662                 ws[i].winno = 0;
 663                 TAILQ_INIT(&ws[i].winlist);
 664         }
 665
 666         XSelectInput(display, root, SubstructureRedirectMask |
 667             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 668             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 669             FocusChangeMask | PropertyChangeMask);
 670
 671         grabkeys();
 672
 673         while (running) {
 674                 XNextEvent(display, &e);
 675                 if (handler[e.type])
 676                         handler[e.type](&e);
 677         }
 678
 679         XCloseDisplay(display);
 680
 681         return (0);
 682 }