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 <string.h>
  60
  61 #include <sys/types.h>
  62 #include <sys/wait.h>
  63 #include <sys/queue.h>
  64
  65 #include <X11/cursorfont.h>
  66 #include <X11/keysym.h>
  67 #include <X11/Xatom.h>
  68 #include <X11/Xlib.h>
  69 #include <X11/Xproto.h>
  70 #include <X11/Xutil.h>
  71
  72 /* #define SWM_DEBUG */
  73 #ifdef SWM_DEBUG
  74 #define DPRINTF(x...)           do { if (swm_debug) fprintf(stderr, x); } while(0)
  75 #define DNPRINTF(n,x...)        do { if (swm_debug & n) fprintf(stderr, x); } while(0)
  76 #define SWM_D_EVENT             0x0001
  77 #define SWM_D_WS                0x0002
  78 #define SWM_D_FOCUS             0x0004
  79 #define SWM_D_MISC              0x0008
  80
  81 uint32_t                swm_debug = 0
  82                             | SWM_D_EVENT
  83                             | SWM_D_WS
  84                             | SWM_D_FOCUS
  85                             | SWM_D_MISC
  86                             ;
  87 #else
  88 #define DPRINTF(x...)
  89 #define DNPRINTF(n,x...)
  90 #endif
  91
  92 #define LENGTH(x)               (sizeof x / sizeof x[0])
  93 #define MODKEY                  Mod1Mask
  94 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  95
  96 int                     (*xerrorxlib)(Display *, XErrorEvent *);
  97 int                     other_wm;
  98 int                     screen;
  99 int                     width, height;
 100 int                     running = 1;
 101 int                     ignore_enter = 0;
 102 unsigned int            numlockmask = 0;
 103 unsigned long           col_focus = 0xff0000;   /* XXX should this be per ws? */
 104 unsigned long           col_unfocus = 0x888888;
 105 Display                 *display;
 106 Window                  root;
 107
 108 /* status bar */
 109 int                     bar_enabled = 1;
 110 int                     bar_height = 12;
 111 Window                  bar_window;
 112 GC                      bar_gc;
 113 XGCValues               bar_gcv;
 114 XFontStruct             *bar_fs;
 115 char                    bar_text[128];
 116
 117 struct ws_win {
 118         TAILQ_ENTRY(ws_win)     entry;
 119         Window                  id;
 120         int                     x;
 121         int                     y;
 122         int                     width;
 123         int                     height;
 124 };
 125
 126 TAILQ_HEAD(ws_win_list, ws_win);
 127
 128 /* define work spaces */
 129 #define SWM_WS_MAX              (10)
 130 struct workspace {
 131         int                     visible;        /* workspace visible */
 132         struct ws_win           *focus;         /* which win has focus */
 133         int                     winno;          /* total nr of windows */
 134         struct ws_win_list      winlist;
 135 } ws[SWM_WS_MAX];
 136 int                     current_ws = 0;
 137
 138 /* args to functions */
 139 union arg {
 140         int                     id;
 141 #define SWM_ARG_ID_FOCUSNEXT    (0)
 142 #define SWM_ARG_ID_FOCUSPREV    (1)
 143 #define SWM_ARG_ID_FOCUSMAIN    (2)
 144         char                    **argv;
 145 };
 146
 147 void
 148 bar_print(void)
 149 {
 150         time_t                  tmt;
 151         struct tm               tm;
 152
 153         /* clear old text */
 154         XSetForeground(display, bar_gc, 0x000000);
 155         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 156             strlen(bar_text));
 157
 158         /* draw new text */
 159         time(&tmt);
 160         localtime_r(&tmt, &tm);
 161         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 162         XSetForeground(display, bar_gc, 0xa0a0a0);
 163         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 164             strlen(bar_text));
 165         XSync(display, False);
 166 }
 167 void
 168 quit(union arg *args)
 169 {
 170         DNPRINTF(SWM_D_MISC, "quit\n");
 171         running = 0;
 172 }
 173
 174 void
 175 spawn(union arg *args)
 176 {
 177         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 178         /*
 179          * The double-fork construct avoids zombie processes and keeps the code
 180          * clean from stupid signal handlers.
 181          */
 182         if(fork() == 0) {
 183                 if(fork() == 0) {
 184                         if(display)
 185                                 close(ConnectionNumber(display));
 186                         setsid();
 187                         execvp(args->argv[0], args->argv);
 188                         fprintf(stderr, "execvp failed\n");
 189                         perror(" failed");
 190                 }
 191                 exit(0);
 192         }
 193         wait(0);
 194 }
 195
 196 void
 197 focus_win(struct ws_win *win)
 198 {
 199         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %lu\n", win->id);
 200         XSetWindowBorder(display, win->id, col_focus);
 201         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 202         ws[current_ws].focus = win;
 203 }
 204
 205 void
 206 unfocus_win(struct ws_win *win)
 207 {
 208         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %lu\n", win->id);
 209         XSetWindowBorder(display, win->id, col_unfocus);
 210         if (ws[current_ws].focus == win)
 211                 ws[current_ws].focus = NULL;
 212 }
 213
 214 void
 215 switchws(union arg *args)
 216 {
 217         int                     wsid = args->id;
 218         struct ws_win           *win;
 219
 220         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 221
 222         if (wsid == current_ws)
 223                 return;
 224
 225         /* map new window first to prevent ugly blinking */
 226         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 227                 XMapWindow(display, win->id);
 228         ws[wsid].visible = 1;
 229
 230         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 231                 XUnmapWindow(display, win->id);
 232         ws[current_ws].visible = 0;
 233
 234         current_ws = wsid;
 235
 236         ignore_enter = 1;
 237         if (ws[wsid].focus != NULL)
 238                 focus_win(ws[wsid].focus);
 239         XSync(display, False);
 240 }
 241
 242 void
 243 focus(union arg *args)
 244 {
 245         struct ws_win           *winfocus, *winlostfocus;
 246
 247         DNPRINTF(SWM_D_FOCUS, "focus: id %d\n", args->id);
 248         if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
 249                 return;
 250
 251         winlostfocus = ws[current_ws].focus;
 252
 253         switch (args->id) {
 254         case SWM_ARG_ID_FOCUSPREV:
 255                 if (ws[current_ws].focus ==
 256                     TAILQ_FIRST(&ws[current_ws].winlist))
 257                         ws[current_ws].focus =
 258                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 259                 else
 260                         ws[current_ws].focus =TAILQ_PREV(ws[current_ws].focus,
 261                             ws_win_list, entry);
 262                 break;
 263
 264         case SWM_ARG_ID_FOCUSNEXT:
 265                 if (ws[current_ws].focus == TAILQ_LAST(&ws[current_ws].winlist,
 266                     ws_win_list))
 267                         ws[current_ws].focus =
 268                             TAILQ_FIRST(&ws[current_ws].winlist);
 269                 else
 270                         ws[current_ws].focus =
 271                             TAILQ_NEXT(ws[current_ws].focus, entry);
 272                 break;
 273
 274         case SWM_ARG_ID_FOCUSMAIN:
 275                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);;
 276                 break;
 277
 278         default:
 279                 return;
 280         }
 281
 282         winfocus = ws[current_ws].focus;
 283         unfocus_win(winlostfocus);
 284         focus_win(winfocus);
 285         XSync(display, False);
 286 }
 287
 288 /* I know this sucks but it works well enough */
 289 void
 290 stack(void)
 291 {
 292         XWindowChanges          wc;
 293         struct ws_win           wf, *win, *winfocus = &wf;
 294         int                     i, h, w, x, y, hrh;
 295
 296         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 297
 298         winfocus->id = root;
 299
 300         if (ws[current_ws].winno == 0)
 301                 return;
 302
 303         if (ws[current_ws].winno > 1)
 304                 w = width / 2;
 305         else
 306                 w = width;
 307
 308         if (ws[current_ws].winno > 2)
 309                 hrh = height / (ws[current_ws].winno - 1);
 310         else
 311                 hrh = 0;
 312
 313         x = 0;
 314         y = bar_height;
 315         h = height;
 316         i = 0;
 317         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 318                 if (i == 1) {
 319                         x += w + 2;
 320                         w -= 2;
 321                 }
 322                 if (i != 0 && hrh != 0) {
 323                         /* correct the last window for lost pixels */
 324                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 325                             ws_win_list)) {
 326                                 h = height - (i * hrh);
 327                                 if (h == 0)
 328                                         h = hrh;
 329                                 else
 330                                         h += hrh;
 331                                 y += hrh;
 332                         } else {
 333                                 h = hrh - 2;
 334                                 /* leave first right hand window at y = 0 */
 335                                 if (i > 1)
 336                                         y += h + 2;
 337                         }
 338                 }
 339
 340                 bzero(&wc, sizeof wc);
 341                 win->x = wc.x = x;
 342                 win->y = wc.y = y;
 343                 win->width = wc.width = w;
 344                 win->height = wc.height = h;
 345                 wc.border_width = 1;
 346                 XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
 347                     CWHeight | CWBorderWidth, &wc);
 348                 if (win == ws[current_ws].focus)
 349                         winfocus = win;
 350                 else
 351                         unfocus_win(win);
 352                 XMapWindow(display, win->id);
 353                 i++;
 354         }
 355
 356         focus_win(winfocus); /* this has to be done outside of the loop */
 357         XSync(display, False);
 358 }
 359
 360 void
 361 swap_to_main(union arg *args)
 362 {
 363         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 364
 365         DNPRINTF(SWM_D_MISC, "swap_to_main: win: %lu\n",
 366             ws[current_ws].focus->id);
 367
 368         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 369         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 370             tmpwin, entry);
 371         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 372         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 373         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 374         ignore_enter = 2;
 375         stack();
 376 }
 377
 378 /* terminal + args */
 379 char                            *term[] = { "xterm", NULL };
 380
 381 /* key definitions */
 382 struct key {
 383         unsigned int            mod;
 384         KeySym                  keysym;
 385         void                    (*func)(union arg *);
 386         union arg               args;
 387 } keys[] = {
 388         /* modifier             key     function                argument */
 389         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 390         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = term } },
 391         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 392         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 393         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 394         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 395         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 396         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 397         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 398         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 399         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 400         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 401         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 402         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 403         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 404         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 405 };
 406
 407 void
 408 updatenumlockmask(void)
 409 {
 410         unsigned int            i, j;
 411         XModifierKeymap         *modmap;
 412
 413         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 414         numlockmask = 0;
 415         modmap = XGetModifierMapping(display);
 416         for (i = 0; i < 8; i++)
 417                 for (j = 0; j < modmap->max_keypermod; j++)
 418                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 419                           == XKeysymToKeycode(display, XK_Num_Lock))
 420                                 numlockmask = (1 << i);
 421
 422         XFreeModifiermap(modmap);
 423 }
 424
 425 void
 426 grabkeys(void)
 427 {
 428         unsigned int            i, j;
 429         KeyCode                 code;
 430         unsigned int            modifiers[] =
 431             { 0, LockMask, numlockmask, numlockmask | LockMask };
 432
 433         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 434         updatenumlockmask();
 435
 436         XUngrabKey(display, AnyKey, AnyModifier, root);
 437         for(i = 0; i < LENGTH(keys); i++) {
 438                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 439                         for(j = 0; j < LENGTH(modifiers); j++)
 440                                 XGrabKey(display, code,
 441                                     keys[i].mod | modifiers[j], root,
 442                                     True, GrabModeAsync, GrabModeAsync);
 443         }
 444 }
 445 void
 446 expose(XEvent *e)
 447 {
 448         DNPRINTF(SWM_D_EVENT, "expose: window: %lu\n", e->xexpose.window);
 449 }
 450
 451 void
 452 keypress(XEvent *e)
 453 {
 454         unsigned int            i;
 455         KeySym                  keysym;
 456         XKeyEvent               *ev = &e->xkey;
 457
 458         DNPRINTF(SWM_D_EVENT, "keypress: window: %lu\n", ev->window);
 459
 460         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 461         for(i = 0; i < LENGTH(keys); i++)
 462                 if(keysym == keys[i].keysym
 463                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 464                    && keys[i].func)
 465                         keys[i].func(&(keys[i].args));
 466 }
 467
 468 void
 469 buttonpress(XEvent *e)
 470 {
 471         XButtonPressedEvent     *ev = &e->xbutton;
 472 #ifdef SWM_CLICKTOFOCUS
 473         struct ws_win           *win;
 474 #endif
 475
 476
 477         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %lu\n", ev->window);
 478
 479         if (ev->window == root)
 480                 return;
 481         if (ev->window == ws[current_ws].focus->id)
 482                 return;
 483 #ifdef SWM_CLICKTOFOCUS
 484         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 485                 if (win->id == ev->window) {
 486                         /* focus in the clicked window */
 487                         XSetWindowBorder(display, ev->window, 0xff0000);
 488                         XSetWindowBorder(display,
 489                             ws[current_ws].focus->id, 0x888888);
 490                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 491                             CurrentTime);
 492                         ws[current_ws].focus = win;
 493                         XSync(display, False);
 494                         break;
 495         }
 496 #endif
 497 }
 498
 499 void
 500 configurerequest(XEvent *e)
 501 {
 502         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 503         struct ws_win           *win;
 504
 505         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %lu\n", ev->window);
 506
 507         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 508             FocusChangeMask);
 509
 510         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 511                 errx(1, "calloc: failed to allocate memory for new window");
 512
 513         win->id = ev->window;
 514         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 515         ws[current_ws].focus = win; /* make new win focused */
 516         ws[current_ws].winno++;
 517         stack();
 518 }
 519
 520 void
 521 configurenotify(XEvent *e)
 522 {
 523         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %lu\n",
 524             e->xconfigure.window);
 525 }
 526
 527 void
 528 destroynotify(XEvent *e)
 529 {
 530         struct ws_win           *win;
 531         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 532
 533         DNPRINTF(SWM_D_EVENT, "destroynotify: window %lu\n", ev->window);
 534
 535         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 536                 if (ev->window == win->id) {
 537                         /* find a window to focus */
 538                         ws[current_ws].focus =
 539                             TAILQ_PREV(win, ws_win_list,entry);
 540                         if (ws[current_ws].focus == NULL)
 541                                 ws[current_ws].focus =
 542                                     TAILQ_FIRST(&ws[current_ws].winlist);
 543
 544                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 545                         free(win);
 546                         ws[current_ws].winno--;
 547                         break;
 548                 }
 549         }
 550
 551         stack();
 552 }
 553
 554 void
 555 enternotify(XEvent *e)
 556 {
 557         XCrossingEvent          *ev = &e->xcrossing;
 558         struct ws_win           *win;
 559
 560         DNPRINTF(SWM_D_EVENT, "enternotify: window: %lu\n", ev->window);
 561
 562         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 563             ev->window != root)
 564                 return;
 565         if (ignore_enter) {
 566                 /* eat event(s) to prevent autofocus */
 567                 ignore_enter--;
 568                 return;
 569         }
 570         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 571                 if (win->id == ev->window)
 572                         focus_win(win);
 573                 else
 574                         unfocus_win(win);
 575         }
 576 }
 577
 578 void
 579 focusin(XEvent *e)
 580 {
 581         XFocusChangeEvent       *ev = &e->xfocus;
 582
 583         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu\n", ev->window);
 584
 585         if (ev->window == root)
 586                 return;
 587
 588         /*
 589          * kill grab for now so that we can cut and paste , this screws up
 590          * click to focus
 591          */
 592         /*
 593         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu grabbing\n", ev->window);
 594         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 595             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 596         */
 597 }
 598
 599 void
 600 mappingnotify(XEvent *e)
 601 {
 602         XMappingEvent           *ev = &e->xmapping;
 603
 604         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %lu\n", ev->window);
 605
 606         XRefreshKeyboardMapping(ev);
 607         if(ev->request == MappingKeyboard)
 608                 grabkeys();
 609 }
 610
 611 void
 612 maprequest(XEvent *e)
 613 {
 614         DNPRINTF(SWM_D_EVENT, "maprequest: window: %lu\n",
 615             e->xmaprequest.window);
 616 }
 617
 618 void
 619 propertynotify(XEvent *e)
 620 {
 621         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %lu\n",
 622             e->xproperty.window);
 623 }
 624
 625 void
 626 unmapnotify(XEvent *e)
 627 {
 628         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %lu\n", e->xunmap.window);
 629 }
 630
 631 void                    (*handler[LASTEvent])(XEvent *) = {
 632                                 [Expose] = expose,
 633                                 [KeyPress] = keypress,
 634                                 [ButtonPress] = buttonpress,
 635                                 [ConfigureRequest] = configurerequest,
 636                                 [ConfigureNotify] = configurenotify,
 637                                 [DestroyNotify] = destroynotify,
 638                                 [EnterNotify] = enternotify,
 639                                 [FocusIn] = focusin,
 640                                 [MappingNotify] = mappingnotify,
 641                                 [MapRequest] = maprequest,
 642                                 [PropertyNotify] = propertynotify,
 643                                 [UnmapNotify] = unmapnotify,
 644 };
 645
 646 int
 647 xerror_start(Display *d, XErrorEvent *ee)
 648 {
 649         other_wm = 1;
 650         return (-1);
 651 }
 652
 653 int
 654 xerror(Display *d, XErrorEvent *ee)
 655 {
 656         fprintf(stderr, "error: %p %p\n", display, ee);
 657
 658         return (-1);
 659 }
 660
 661 int
 662 active_wm(void)
 663 {
 664         other_wm = 0;
 665         xerrorxlib = XSetErrorHandler(xerror_start);
 666
 667         /* this causes an error if some other window manager is running */
 668         XSelectInput(display, DefaultRootWindow(display),
 669             SubstructureRedirectMask);
 670         XSync(display, False);
 671         if(other_wm)
 672                 return (1);
 673
 674         XSetErrorHandler(xerror);
 675         XSync(display, False);
 676         return (0);
 677 }
 678
 679 int
 680 main(int argc, char *argv[])
 681 {
 682         XEvent                  e;
 683         int                     i;
 684
 685         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 686         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 687                 warnx("no locale support");
 688
 689         if(!(display = XOpenDisplay(0)))
 690                 errx(1, "can not open display");
 691
 692         if (active_wm())
 693                 errx(1, "other wm running");
 694
 695         screen = DefaultScreen(display);
 696         root = RootWindow(display, screen);
 697         width = DisplayWidth(display, screen) - 2;
 698         height = DisplayHeight(display, screen) - 2;
 699
 700         /* make work space 1 active */
 701         ws[0].visible = 1;
 702         ws[0].focus = NULL;
 703         ws[0].winno = 0;
 704         TAILQ_INIT(&ws[0].winlist);
 705         for (i = 1; i < SWM_WS_MAX; i++) {
 706                 ws[i].visible = 0;
 707                 ws[i].focus = NULL;
 708                 ws[i].winno = 0;
 709                 TAILQ_INIT(&ws[i].winlist);
 710         }
 711
 712         /* setup status bar */
 713         bar_fs = XLoadQueryFont(display,
 714             "-*-terminus-*-*-*-*-*-*-*-*-*-*-*-*");
 715         if (bar_fs == NULL) {
 716                 /* load a font that is default */
 717                 bar_fs = XLoadQueryFont(display,
 718                     "-*-times-medium-r-*-*-*-*-*-*-*-*-*-*");
 719                 if (bar_fs == NULL)
 720                         errx(1, "couldn't load font");
 721         }
 722         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 723
 724         XSelectInput(display, root, SubstructureRedirectMask |
 725             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 726             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 727             FocusChangeMask | PropertyChangeMask);
 728
 729         grabkeys();
 730
 731         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 732             bar_height - 2, 1, 0x008080, 0x000000);
 733         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 734         XSetFont(display, bar_gc, bar_fs->fid);
 735         if (bar_enabled) {
 736                 height -= bar_height; /* correct screen height */
 737                 XMapWindow(display, bar_window);
 738         }
 739         bar_print();
 740
 741         while (running) {
 742                 XNextEvent(display, &e);
 743                 if (handler[e.type])
 744                         handler[e.type](&e);
 745         }
 746
 747         XCloseDisplay(display);
 748
 749         return (0);
 750 }