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
  60 #include <sys/types.h>
  61 #include <sys/wait.h>
  62 #include <sys/queue.h>
  63
  64 #include <X11/cursorfont.h>
  65 #include <X11/keysym.h>
  66 #include <X11/Xatom.h>
  67 #include <X11/Xlib.h>
  68 #include <X11/Xproto.h>
  69 #include <X11/Xutil.h>
  70
  71 /* #define SWM_DEBUG */
  72 #ifdef SWM_DEBUG
  73 #define DPRINTF(x...)           do { if (swm_debug) fprintf(stderr, x); } while(0)
  74 #define DNPRINTF(n,x...)        do { if (swm_debug & n) fprintf(stderr, x); } while(0)
  75 #define SWM_D_EVENT             0x0001
  76 #define SWM_D_WS                0x0002
  77 #define SWM_D_FOCUS             0x0004
  78 #define SWM_D_MISC              0x0008
  79
  80 uint32_t                swm_debug = 0
  81                             | SWM_D_EVENT
  82                             | SWM_D_WS
  83                             | SWM_D_FOCUS
  84                             | SWM_D_MISC
  85                             ;
  86 #else
  87 #define DPRINTF(x...)
  88 #define DNPRINTF(n,x...)
  89 #endif
  90
  91 #define LENGTH(x)               (sizeof x / sizeof x[0])
  92 #define MODKEY                  Mod1Mask
  93 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  94
  95 int                     (*xerrorxlib)(Display *, XErrorEvent *);
  96 int                     other_wm;
  97 int                     screen;
  98 int                     width, height;
  99 int                     running = 1;
 100 int                     ignore_enter = 0;
 101 unsigned int            numlockmask = 0;
 102 unsigned long           col_focus = 0xff0000;   /* XXX should this be per ws? */
 103 unsigned long           col_unfocus = 0x888888;
 104 Display                 *display;
 105 Window                  root;
 106
 107 /* status bar */
 108 int                     bar_enabled = 1;
 109 int                     bar_height = 12;
 110 Window                  bar_window;
 111 GC                      bar_gc;
 112 XGCValues               bar_gcv;
 113 XFontStruct             *bar_fs;
 114 char                    bar_text[128];
 115
 116 struct ws_win {
 117         TAILQ_ENTRY(ws_win)     entry;
 118         Window                  id;
 119         int                     x;
 120         int                     y;
 121         int                     width;
 122         int                     height;
 123 };
 124
 125 TAILQ_HEAD(ws_win_list, ws_win);
 126
 127 /* define work spaces */
 128 #define SWM_WS_MAX              (10)
 129 struct workspace {
 130         int                     visible;        /* workspace visible */
 131         struct ws_win           *focus;         /* which win has focus */
 132         int                     winno;          /* total nr of windows */
 133         struct ws_win_list      winlist;
 134 } ws[SWM_WS_MAX];
 135 int                     current_ws = 0;
 136
 137 /* args to functions */
 138 union arg {
 139         int                     id;
 140 #define SWM_ARG_ID_FOCUSNEXT    (0)
 141 #define SWM_ARG_ID_FOCUSPREV    (1)
 142 #define SWM_ARG_ID_FOCUSMAIN    (2)
 143         char                    **argv;
 144 };
 145
 146 void
 147 bar_print(void)
 148 {
 149         time_t                  tmt;
 150         struct tm               tm;
 151
 152         /* clear old text */
 153         XSetForeground(display, bar_gc, 0x000000);
 154         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 155             strlen(bar_text));
 156
 157         /* draw new text */
 158         time(&tmt);
 159         localtime_r(&tmt, &tm);
 160         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 161         XSetForeground(display, bar_gc, 0xa0a0a0);
 162         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 163             strlen(bar_text));
 164         XSync(display, False);
 165 }
 166 void
 167 quit(union arg *args)
 168 {
 169         DNPRINTF(SWM_D_MISC, "quit\n");
 170         running = 0;
 171 }
 172
 173 void
 174 spawn(union arg *args)
 175 {
 176         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 177         /*
 178          * The double-fork construct avoids zombie processes and keeps the code
 179          * clean from stupid signal handlers.
 180          */
 181         if(fork() == 0) {
 182                 if(fork() == 0) {
 183                         if(display)
 184                                 close(ConnectionNumber(display));
 185                         setsid();
 186                         execvp(args->argv[0], args->argv);
 187                         fprintf(stderr, "execvp failed\n");
 188                         perror(" failed");
 189                 }
 190                 exit(0);
 191         }
 192         wait(0);
 193 }
 194
 195 void
 196 focus_win(struct ws_win *win)
 197 {
 198         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %d\n", win->id);
 199         XSetWindowBorder(display, win->id, col_focus);
 200         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 201         ws[current_ws].focus = win;
 202 }
 203
 204 void
 205 unfocus_win(struct ws_win *win)
 206 {
 207         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %d\n", win->id);
 208         XSetWindowBorder(display, win->id, col_unfocus);
 209         if (ws[current_ws].focus == win)
 210                 ws[current_ws].focus = NULL;
 211 }
 212
 213 void
 214 switchws(union arg *args)
 215 {
 216         int                     wsid = args->id;
 217         struct ws_win           *win;
 218         Window                  winfocus;
 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, winno, 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: %d\n", ws[current_ws].focus->id);
 366         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 367         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 368             tmpwin, entry);
 369         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 370         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 371         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 372         ignore_enter = 2;
 373         stack();
 374 }
 375
 376 /* terminal + args */
 377 char                            *term[] = { "xterm", NULL };
 378
 379 /* key definitions */
 380 struct key {
 381         unsigned int            mod;
 382         KeySym                  keysym;
 383         void                    (*func)(union arg *);
 384         union arg               args;
 385 } keys[] = {
 386         /* modifier             key     function                argument */
 387         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 388         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = term } },
 389         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 390         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 391         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 392         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 393         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 394         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 395         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 396         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 397         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 398         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 399         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 400         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 401         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 402         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 403 };
 404
 405 void
 406 updatenumlockmask(void)
 407 {
 408         unsigned int            i, j;
 409         XModifierKeymap         *modmap;
 410
 411         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 412         numlockmask = 0;
 413         modmap = XGetModifierMapping(display);
 414         for (i = 0; i < 8; i++)
 415                 for (j = 0; j < modmap->max_keypermod; j++)
 416                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 417                           == XKeysymToKeycode(display, XK_Num_Lock))
 418                                 numlockmask = (1 << i);
 419
 420         XFreeModifiermap(modmap);
 421 }
 422
 423 void
 424 grabkeys(void)
 425 {
 426         unsigned int            i, j;
 427         KeyCode                 code;
 428         unsigned int            modifiers[] =
 429             { 0, LockMask, numlockmask, numlockmask | LockMask };
 430
 431         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 432         updatenumlockmask();
 433
 434         XUngrabKey(display, AnyKey, AnyModifier, root);
 435         for(i = 0; i < LENGTH(keys); i++) {
 436                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 437                         for(j = 0; j < LENGTH(modifiers); j++)
 438                                 XGrabKey(display, code,
 439                                     keys[i].mod | modifiers[j], root,
 440                                     True, GrabModeAsync, GrabModeAsync);
 441         }
 442 }
 443 void
 444 expose(XEvent *e)
 445 {
 446         XExposeEvent            *ev = &e->xexpose;
 447
 448         DNPRINTF(SWM_D_EVENT, "expose: window: %d\n", ev->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: %d\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         struct ws_win           *win;
 473
 474         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %d\n", ev->window);
 475
 476         if (ev->window == root)
 477                 return;
 478         if (ev->window == ws[current_ws].focus->id)
 479                 return;
 480 #if 0
 481         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 482                 if (win->id == ev->window) {
 483                         /* focus in the clicked window */
 484                         XSetWindowBorder(display, ev->window, 0xff0000);
 485                         XSetWindowBorder(display,
 486                             ws[current_ws].focus->id, 0x888888);
 487                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 488                             CurrentTime);
 489                         ws[current_ws].focus = win;
 490                         XSync(display, False);
 491                         break;
 492         }
 493 #endif
 494 }
 495
 496 void
 497 configurerequest(XEvent *e)
 498 {
 499         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 500         struct ws_win           *win;
 501
 502         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %d\n", ev->window);
 503
 504         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 505             FocusChangeMask);
 506
 507         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 508                 errx(1, "calloc: failed to allocate memory for new window");
 509
 510         win->id = ev->window;
 511         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 512         ws[current_ws].focus = win; /* make new win focused */
 513         ws[current_ws].winno++;
 514         stack();
 515 }
 516
 517 void
 518 configurenotify(XEvent *e)
 519 {
 520         XConfigureEvent         *ev = &e->xconfigure;
 521
 522         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %d\n", ev->window);
 523 }
 524
 525 void
 526 destroynotify(XEvent *e)
 527 {
 528         size_t                  sz;
 529         struct ws_win           *win;
 530         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 531
 532         DNPRINTF(SWM_D_EVENT, "destroynotify: window %d\n", ev->window);
 533
 534         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 535                 if (ev->window == win->id) {
 536                         /* find a window to focus */
 537                         ws[current_ws].focus =
 538                             TAILQ_PREV(win, ws_win_list,entry);
 539                         if (ws[current_ws].focus == NULL)
 540                                 ws[current_ws].focus =
 541                                     TAILQ_FIRST(&ws[current_ws].winlist);
 542
 543                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 544                         free(win);
 545                         ws[current_ws].winno--;
 546                         break;
 547                 }
 548         }
 549
 550         stack();
 551 }
 552
 553 void
 554 enternotify(XEvent *e)
 555 {
 556         XCrossingEvent          *ev = &e->xcrossing;
 557         struct ws_win           *win;
 558
 559         DNPRINTF(SWM_D_EVENT, "enternotify: window: %d\n", ev->window);
 560
 561         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 562             ev->window != root)
 563                 return;
 564         if (ignore_enter) {
 565                 /* eat event(s) to prevent autofocus */
 566                 ignore_enter--;
 567                 return;
 568         }
 569         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 570                 if (win->id == ev->window)
 571                         focus_win(win);
 572                 else
 573                         unfocus_win(win);
 574         }
 575 }
 576
 577 void
 578 focusin(XEvent *e)
 579 {
 580         XFocusChangeEvent       *ev = &e->xfocus;
 581
 582         DNPRINTF(SWM_D_EVENT, "focusin: window: %d\n", ev->window);
 583
 584         if (ev->window == root)
 585                 return;
 586
 587         /*
 588          * kill grab for now so that we can cut and paste , this screws up
 589          * click to focus
 590          */
 591         /*
 592         DNPRINTF(SWM_D_EVENT, "focusin: window: %d grabbing\n", ev->window);
 593         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 594             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 595         */
 596 }
 597
 598 void
 599 mappingnotify(XEvent *e)
 600 {
 601         XMappingEvent           *ev = &e->xmapping;
 602
 603         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %d\n", ev->window);
 604
 605         XRefreshKeyboardMapping(ev);
 606         if(ev->request == MappingKeyboard)
 607                 grabkeys();
 608 }
 609
 610 void
 611 maprequest(XEvent *e)
 612 {
 613         XMapRequestEvent        *ev = &e->xmaprequest;
 614
 615         DNPRINTF(SWM_D_EVENT, "maprequest: window: %d\n", ev->window);
 616 }
 617
 618 void
 619 propertynotify(XEvent *e)
 620 {
 621         XPropertyEvent          *ev = &e->xproperty;
 622
 623         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %d\n", ev->window);
 624 }
 625
 626 void
 627 unmapnotify(XEvent *e)
 628 {
 629         XUnmapEvent             *ev = &e->xunmap;
 630
 631         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %d\n", ev->window);
 632 }
 633
 634 void                    (*handler[LASTEvent])(XEvent *) = {
 635                                 [Expose] = expose,
 636                                 [KeyPress] = keypress,
 637                                 [ButtonPress] = buttonpress,
 638                                 [ConfigureRequest] = configurerequest,
 639                                 [ConfigureNotify] = configurenotify,
 640                                 [DestroyNotify] = destroynotify,
 641                                 [EnterNotify] = enternotify,
 642                                 [FocusIn] = focusin,
 643                                 [MappingNotify] = mappingnotify,
 644                                 [MapRequest] = maprequest,
 645                                 [PropertyNotify] = propertynotify,
 646                                 [UnmapNotify] = unmapnotify,
 647 };
 648
 649 int
 650 xerror_start(Display *d, XErrorEvent *ee)
 651 {
 652         other_wm = 1;
 653         return (-1);
 654 }
 655
 656 int
 657 xerror(Display *d, XErrorEvent *ee)
 658 {
 659         fprintf(stderr, "error: %p %p\n", display, ee);
 660
 661         return (-1);
 662 }
 663
 664 int
 665 active_wm(void)
 666 {
 667         other_wm = 0;
 668         xerrorxlib = XSetErrorHandler(xerror_start);
 669
 670         /* this causes an error if some other window manager is running */
 671         XSelectInput(display, DefaultRootWindow(display),
 672             SubstructureRedirectMask);
 673         XSync(display, False);
 674         if(other_wm)
 675                 return (1);
 676
 677         XSetErrorHandler(xerror);
 678         XSync(display, False);
 679         return (0);
 680 }
 681
 682 int
 683 main(int argc, char *argv[])
 684 {
 685         XEvent                  e;
 686         int                     i;
 687
 688         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 689         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 690                 warnx("no locale support");
 691
 692         if(!(display = XOpenDisplay(0)))
 693                 errx(1, "can not open display");
 694
 695         if (active_wm())
 696                 errx(1, "other wm running");
 697
 698         screen = DefaultScreen(display);
 699         root = RootWindow(display, screen);
 700         width = DisplayWidth(display, screen) - 2;
 701         height = DisplayHeight(display, screen) - 2;
 702
 703         /* make work space 1 active */
 704         ws[0].visible = 1;
 705         ws[0].focus = NULL;
 706         ws[0].winno = 0;
 707         TAILQ_INIT(&ws[0].winlist);
 708         for (i = 1; i < SWM_WS_MAX; i++) {
 709                 ws[i].visible = 0;
 710                 ws[i].focus = NULL;
 711                 ws[i].winno = 0;
 712                 TAILQ_INIT(&ws[i].winlist);
 713         }
 714
 715         /* setup status bar */
 716         bar_fs = XLoadQueryFont(display,
 717             "-*-terminus-*-*-*-*-*-*-*-*-*-*-*-*");
 718         if (bar_fs == NULL) {
 719                 /* load a font that is default */
 720                 bar_fs = XLoadQueryFont(display,
 721                     "-*-times-medium-r-*-*-*-*-*-*-*-*-*-*");
 722                 if (bar_fs == NULL)
 723                         errx(1, "couldn't load font");
 724         }
 725         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 726
 727         XSelectInput(display, root, SubstructureRedirectMask |
 728             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 729             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 730             FocusChangeMask | PropertyChangeMask);
 731
 732         grabkeys();
 733
 734         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 735             bar_height - 2, 1, 0x008080, 0x000000);
 736         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 737         XSetFont(display, bar_gc, bar_fs->fid);
 738         if (bar_enabled) {
 739                 height -= bar_height; /* correct screen height */
 740                 XMapWindow(display, bar_window);
 741         }
 742         bar_print();
 743
 744         while (running) {
 745                 XNextEvent(display, &e);
 746                 if (handler[e.type])
 747                         handler[e.type](&e);
 748         }
 749
 750         XCloseDisplay(display);
 751
 752         return (0);
 753 }