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         int                     restack;        /* restack on switch */
 133         struct ws_win           *focus;         /* which win has focus */
 134         int                     winno;          /* total nr of windows */
 135         struct ws_win_list      winlist;        /* list of windows in ws */
 136 } ws[SWM_WS_MAX];
 137 int                     current_ws = 0;
 138
 139 /* args to functions */
 140 union arg {
 141         int                     id;
 142 #define SWM_ARG_ID_FOCUSNEXT    (0)
 143 #define SWM_ARG_ID_FOCUSPREV    (1)
 144 #define SWM_ARG_ID_FOCUSMAIN    (2)
 145         char                    **argv;
 146 };
 147
 148
 149 void    stack(void);
 150
 151 void
 152 bar_print(void)
 153 {
 154         time_t                  tmt;
 155         struct tm               tm;
 156
 157         /* clear old text */
 158         XSetForeground(display, bar_gc, 0x000000);
 159         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 160             strlen(bar_text));
 161
 162         /* draw new text */
 163         time(&tmt);
 164         localtime_r(&tmt, &tm);
 165         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 166         XSetForeground(display, bar_gc, 0xa0a0a0);
 167         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 168             strlen(bar_text));
 169         XSync(display, False);
 170 }
 171 void
 172 quit(union arg *args)
 173 {
 174         DNPRINTF(SWM_D_MISC, "quit\n");
 175         running = 0;
 176 }
 177
 178 void
 179 spawn(union arg *args)
 180 {
 181         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 182         /*
 183          * The double-fork construct avoids zombie processes and keeps the code
 184          * clean from stupid signal handlers.
 185          */
 186         if(fork() == 0) {
 187                 if(fork() == 0) {
 188                         if(display)
 189                                 close(ConnectionNumber(display));
 190                         setsid();
 191                         execvp(args->argv[0], args->argv);
 192                         fprintf(stderr, "execvp failed\n");
 193                         perror(" failed");
 194                 }
 195                 exit(0);
 196         }
 197         wait(0);
 198 }
 199
 200 void
 201 focus_win(struct ws_win *win)
 202 {
 203         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %lu\n", win->id);
 204         XSetWindowBorder(display, win->id, col_focus);
 205         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 206         ws[current_ws].focus = win;
 207 }
 208
 209 void
 210 unfocus_win(struct ws_win *win)
 211 {
 212         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %lu\n", win->id);
 213         XSetWindowBorder(display, win->id, col_unfocus);
 214         if (ws[current_ws].focus == win)
 215                 ws[current_ws].focus = NULL;
 216 }
 217
 218 void
 219 switchws(union arg *args)
 220 {
 221         int                     wsid = args->id;
 222         struct ws_win           *win;
 223
 224         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 225
 226         if (wsid == current_ws)
 227                 return;
 228
 229         /* map new window first to prevent ugly blinking */
 230         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 231                 XMapWindow(display, win->id);
 232         ws[wsid].visible = 1;
 233
 234         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 235                 XUnmapWindow(display, win->id);
 236         ws[current_ws].visible = 0;
 237
 238         current_ws = wsid;
 239
 240         ignore_enter = 1;
 241         if (ws[wsid].restack) {
 242                 stack();
 243         } else {
 244                 if (ws[wsid].focus != NULL)
 245                         focus_win(ws[wsid].focus);
 246                 XSync(display, False);
 247         }
 248 }
 249
 250 void
 251 focus(union arg *args)
 252 {
 253         struct ws_win           *winfocus, *winlostfocus;
 254
 255         DNPRINTF(SWM_D_FOCUS, "focus: id %d\n", args->id);
 256         if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
 257                 return;
 258
 259         winlostfocus = ws[current_ws].focus;
 260
 261         switch (args->id) {
 262         case SWM_ARG_ID_FOCUSPREV:
 263                 if (ws[current_ws].focus ==
 264                     TAILQ_FIRST(&ws[current_ws].winlist))
 265                         ws[current_ws].focus =
 266                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 267                 else
 268                         ws[current_ws].focus =TAILQ_PREV(ws[current_ws].focus,
 269                             ws_win_list, entry);
 270                 break;
 271
 272         case SWM_ARG_ID_FOCUSNEXT:
 273                 if (ws[current_ws].focus == TAILQ_LAST(&ws[current_ws].winlist,
 274                     ws_win_list))
 275                         ws[current_ws].focus =
 276                             TAILQ_FIRST(&ws[current_ws].winlist);
 277                 else
 278                         ws[current_ws].focus =
 279                             TAILQ_NEXT(ws[current_ws].focus, entry);
 280                 break;
 281
 282         case SWM_ARG_ID_FOCUSMAIN:
 283                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);;
 284                 break;
 285
 286         default:
 287                 return;
 288         }
 289
 290         winfocus = ws[current_ws].focus;
 291         unfocus_win(winlostfocus);
 292         focus_win(winfocus);
 293         XSync(display, False);
 294 }
 295
 296 /* I know this sucks but it works well enough */
 297 void
 298 stack(void)
 299 {
 300         XWindowChanges          wc;
 301         struct ws_win           wf, *win, *winfocus = &wf;
 302         int                     i, h, w, x, y, hrh;
 303
 304         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 305
 306         winfocus->id = root;
 307
 308         if (ws[current_ws].winno == 0)
 309                 return;
 310
 311         if (ws[current_ws].winno > 1)
 312                 w = width / 2;
 313         else
 314                 w = width;
 315
 316         if (ws[current_ws].winno > 2)
 317                 hrh = height / (ws[current_ws].winno - 1);
 318         else
 319                 hrh = 0;
 320
 321         x = 0;
 322         y = bar_height;
 323         h = height;
 324         i = 0;
 325         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 326                 if (i == 1) {
 327                         x += w + 2;
 328                         w -= 2;
 329                 }
 330                 if (i != 0 && hrh != 0) {
 331                         /* correct the last window for lost pixels */
 332                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 333                             ws_win_list)) {
 334                                 h = height - (i * hrh);
 335                                 if (h == 0)
 336                                         h = hrh;
 337                                 else
 338                                         h += hrh;
 339                                 y += hrh;
 340                         } else {
 341                                 h = hrh - 2;
 342                                 /* leave first right hand window at y = 0 */
 343                                 if (i > 1)
 344                                         y += h + 2;
 345                         }
 346                 }
 347
 348                 bzero(&wc, sizeof wc);
 349                 win->x = wc.x = x;
 350                 win->y = wc.y = y;
 351                 win->width = wc.width = w;
 352                 win->height = wc.height = h;
 353                 wc.border_width = 1;
 354                 XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
 355                     CWHeight | CWBorderWidth, &wc);
 356                 if (win == ws[current_ws].focus)
 357                         winfocus = win;
 358                 else
 359                         unfocus_win(win);
 360                 XMapWindow(display, win->id);
 361                 i++;
 362         }
 363
 364         focus_win(winfocus); /* this has to be done outside of the loop */
 365         XSync(display, False);
 366 }
 367
 368 void
 369 swap_to_main(union arg *args)
 370 {
 371         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 372
 373         DNPRINTF(SWM_D_MISC, "swap_to_main: win: %lu\n",
 374             ws[current_ws].focus->id);
 375
 376         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 377         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 378             tmpwin, entry);
 379         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 380         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 381         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 382         ignore_enter = 2;
 383         stack();
 384 }
 385
 386 void
 387 send_to_ws(union arg *args)
 388 {
 389         int                     wsid = args->id;
 390         struct ws_win           *win = ws[current_ws].focus;
 391
 392         DNPRINTF(SWM_D_MISC, "send_to_ws: win: %lu\n", win->id);
 393
 394         XUnmapWindow(display, win->id);
 395
 396         /* find a window to focus */
 397         ws[current_ws].focus = TAILQ_PREV(win, ws_win_list,entry);
 398         if (ws[current_ws].focus == NULL)
 399                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 400
 401         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 402         ws[current_ws].winno--;
 403
 404         TAILQ_INSERT_TAIL(&ws[wsid].winlist, win, entry);
 405         if (ws[wsid].winno == 0)
 406                 ws[wsid].focus = win;
 407         ws[wsid].winno++;
 408         ws[wsid].restack = 1;
 409
 410         stack();
 411 }
 412
 413
 414 /* terminal + args */
 415 char                            *term[] = { "xterm", NULL };
 416
 417 /* key definitions */
 418 struct key {
 419         unsigned int            mod;
 420         KeySym                  keysym;
 421         void                    (*func)(union arg *);
 422         union arg               args;
 423 } keys[] = {
 424         /* modifier             key     function                argument */
 425         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 426         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = term } },
 427         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 428         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 429         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 430         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 431         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 432         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 433         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 434         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 435         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 436         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 437         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 438         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 439         { MODKEY | ShiftMask,   XK_1,           send_to_ws,     {.id = 0} },
 440         { MODKEY | ShiftMask,   XK_2,           send_to_ws,     {.id = 1} },
 441         { MODKEY | ShiftMask,   XK_3,           send_to_ws,     {.id = 2} },
 442         { MODKEY | ShiftMask,   XK_4,           send_to_ws,     {.id = 3} },
 443         { MODKEY | ShiftMask,   XK_5,           send_to_ws,     {.id = 4} },
 444         { MODKEY | ShiftMask,   XK_6,           send_to_ws,     {.id = 5} },
 445         { MODKEY | ShiftMask,   XK_7,           send_to_ws,     {.id = 6} },
 446         { MODKEY | ShiftMask,   XK_8,           send_to_ws,     {.id = 7} },
 447         { MODKEY | ShiftMask,   XK_9,           send_to_ws,     {.id = 8} },
 448         { MODKEY | ShiftMask,   XK_0,           send_to_ws,     {.id = 9} },
 449         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 450         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 451         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 452 };
 453
 454 void
 455 updatenumlockmask(void)
 456 {
 457         unsigned int            i, j;
 458         XModifierKeymap         *modmap;
 459
 460         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 461         numlockmask = 0;
 462         modmap = XGetModifierMapping(display);
 463         for (i = 0; i < 8; i++)
 464                 for (j = 0; j < modmap->max_keypermod; j++)
 465                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 466                           == XKeysymToKeycode(display, XK_Num_Lock))
 467                                 numlockmask = (1 << i);
 468
 469         XFreeModifiermap(modmap);
 470 }
 471
 472 void
 473 grabkeys(void)
 474 {
 475         unsigned int            i, j;
 476         KeyCode                 code;
 477         unsigned int            modifiers[] =
 478             { 0, LockMask, numlockmask, numlockmask | LockMask };
 479
 480         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 481         updatenumlockmask();
 482
 483         XUngrabKey(display, AnyKey, AnyModifier, root);
 484         for(i = 0; i < LENGTH(keys); i++) {
 485                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 486                         for(j = 0; j < LENGTH(modifiers); j++)
 487                                 XGrabKey(display, code,
 488                                     keys[i].mod | modifiers[j], root,
 489                                     True, GrabModeAsync, GrabModeAsync);
 490         }
 491 }
 492 void
 493 expose(XEvent *e)
 494 {
 495         DNPRINTF(SWM_D_EVENT, "expose: window: %lu\n", e->xexpose.window);
 496 }
 497
 498 void
 499 keypress(XEvent *e)
 500 {
 501         unsigned int            i;
 502         KeySym                  keysym;
 503         XKeyEvent               *ev = &e->xkey;
 504
 505         DNPRINTF(SWM_D_EVENT, "keypress: window: %lu\n", ev->window);
 506
 507         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 508         for(i = 0; i < LENGTH(keys); i++)
 509                 if(keysym == keys[i].keysym
 510                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 511                    && keys[i].func)
 512                         keys[i].func(&(keys[i].args));
 513 }
 514
 515 void
 516 buttonpress(XEvent *e)
 517 {
 518         XButtonPressedEvent     *ev = &e->xbutton;
 519 #ifdef SWM_CLICKTOFOCUS
 520         struct ws_win           *win;
 521 #endif
 522
 523
 524         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %lu\n", ev->window);
 525
 526         if (ev->window == root)
 527                 return;
 528         if (ev->window == ws[current_ws].focus->id)
 529                 return;
 530 #ifdef SWM_CLICKTOFOCUS
 531         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 532                 if (win->id == ev->window) {
 533                         /* focus in the clicked window */
 534                         XSetWindowBorder(display, ev->window, 0xff0000);
 535                         XSetWindowBorder(display,
 536                             ws[current_ws].focus->id, 0x888888);
 537                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 538                             CurrentTime);
 539                         ws[current_ws].focus = win;
 540                         XSync(display, False);
 541                         break;
 542         }
 543 #endif
 544 }
 545
 546 void
 547 configurerequest(XEvent *e)
 548 {
 549         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 550         struct ws_win           *win;
 551
 552         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %lu\n", ev->window);
 553
 554         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 555             FocusChangeMask);
 556
 557         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 558                 errx(1, "calloc: failed to allocate memory for new window");
 559
 560         win->id = ev->window;
 561         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 562         ws[current_ws].focus = win; /* make new win focused */
 563         ws[current_ws].winno++;
 564         stack();
 565 }
 566
 567 void
 568 configurenotify(XEvent *e)
 569 {
 570         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %lu\n",
 571             e->xconfigure.window);
 572 }
 573
 574 void
 575 destroynotify(XEvent *e)
 576 {
 577         struct ws_win           *win;
 578         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 579
 580         DNPRINTF(SWM_D_EVENT, "destroynotify: window %lu\n", ev->window);
 581
 582         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 583                 if (ev->window == win->id) {
 584                         /* find a window to focus */
 585                         ws[current_ws].focus =
 586                             TAILQ_PREV(win, ws_win_list,entry);
 587                         if (ws[current_ws].focus == NULL)
 588                                 ws[current_ws].focus =
 589                                     TAILQ_FIRST(&ws[current_ws].winlist);
 590
 591                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 592                         free(win);
 593                         ws[current_ws].winno--;
 594                         break;
 595                 }
 596         }
 597
 598         stack();
 599 }
 600
 601 void
 602 enternotify(XEvent *e)
 603 {
 604         XCrossingEvent          *ev = &e->xcrossing;
 605         struct ws_win           *win;
 606
 607         DNPRINTF(SWM_D_EVENT, "enternotify: window: %lu\n", ev->window);
 608
 609         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 610             ev->window != root)
 611                 return;
 612         if (ignore_enter) {
 613                 /* eat event(s) to prevent autofocus */
 614                 ignore_enter--;
 615                 return;
 616         }
 617         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 618                 if (win->id == ev->window)
 619                         focus_win(win);
 620                 else
 621                         unfocus_win(win);
 622         }
 623 }
 624
 625 void
 626 focusin(XEvent *e)
 627 {
 628         XFocusChangeEvent       *ev = &e->xfocus;
 629
 630         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu\n", ev->window);
 631
 632         if (ev->window == root)
 633                 return;
 634
 635         /*
 636          * kill grab for now so that we can cut and paste , this screws up
 637          * click to focus
 638          */
 639         /*
 640         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu grabbing\n", ev->window);
 641         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 642             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 643         */
 644 }
 645
 646 void
 647 mappingnotify(XEvent *e)
 648 {
 649         XMappingEvent           *ev = &e->xmapping;
 650
 651         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %lu\n", ev->window);
 652
 653         XRefreshKeyboardMapping(ev);
 654         if(ev->request == MappingKeyboard)
 655                 grabkeys();
 656 }
 657
 658 void
 659 maprequest(XEvent *e)
 660 {
 661         DNPRINTF(SWM_D_EVENT, "maprequest: window: %lu\n",
 662             e->xmaprequest.window);
 663 }
 664
 665 void
 666 propertynotify(XEvent *e)
 667 {
 668         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %lu\n",
 669             e->xproperty.window);
 670 }
 671
 672 void
 673 unmapnotify(XEvent *e)
 674 {
 675         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %lu\n", e->xunmap.window);
 676 }
 677
 678 void                    (*handler[LASTEvent])(XEvent *) = {
 679                                 [Expose] = expose,
 680                                 [KeyPress] = keypress,
 681                                 [ButtonPress] = buttonpress,
 682                                 [ConfigureRequest] = configurerequest,
 683                                 [ConfigureNotify] = configurenotify,
 684                                 [DestroyNotify] = destroynotify,
 685                                 [EnterNotify] = enternotify,
 686                                 [FocusIn] = focusin,
 687                                 [MappingNotify] = mappingnotify,
 688                                 [MapRequest] = maprequest,
 689                                 [PropertyNotify] = propertynotify,
 690                                 [UnmapNotify] = unmapnotify,
 691 };
 692
 693 int
 694 xerror_start(Display *d, XErrorEvent *ee)
 695 {
 696         other_wm = 1;
 697         return (-1);
 698 }
 699
 700 int
 701 xerror(Display *d, XErrorEvent *ee)
 702 {
 703         fprintf(stderr, "error: %p %p\n", display, ee);
 704
 705         return (-1);
 706 }
 707
 708 int
 709 active_wm(void)
 710 {
 711         other_wm = 0;
 712         xerrorxlib = XSetErrorHandler(xerror_start);
 713
 714         /* this causes an error if some other window manager is running */
 715         XSelectInput(display, DefaultRootWindow(display),
 716             SubstructureRedirectMask);
 717         XSync(display, False);
 718         if(other_wm)
 719                 return (1);
 720
 721         XSetErrorHandler(xerror);
 722         XSync(display, False);
 723         return (0);
 724 }
 725
 726 int
 727 main(int argc, char *argv[])
 728 {
 729         XEvent                  e;
 730         int                     i;
 731
 732         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 733         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 734                 warnx("no locale support");
 735
 736         if(!(display = XOpenDisplay(0)))
 737                 errx(1, "can not open display");
 738
 739         if (active_wm())
 740                 errx(1, "other wm running");
 741
 742         screen = DefaultScreen(display);
 743         root = RootWindow(display, screen);
 744         width = DisplayWidth(display, screen) - 2;
 745         height = DisplayHeight(display, screen) - 2;
 746
 747         /* make work space 1 active */
 748         ws[0].visible = 1;
 749         ws[0].restack = 0;
 750         ws[0].focus = NULL;
 751         ws[0].winno = 0;
 752         TAILQ_INIT(&ws[0].winlist);
 753         for (i = 1; i < SWM_WS_MAX; i++) {
 754                 ws[i].visible = 0;
 755                 ws[i].restack = 0;
 756                 ws[i].focus = NULL;
 757                 ws[i].winno = 0;
 758                 TAILQ_INIT(&ws[i].winlist);
 759         }
 760
 761         /* setup status bar */
 762         bar_fs = XLoadQueryFont(display,
 763             "-*-terminus-*-*-*-*-*-*-*-*-*-*-*-*");
 764         if (bar_fs == NULL) {
 765                 /* load a font that is default */
 766                 bar_fs = XLoadQueryFont(display,
 767                     "-*-times-medium-r-*-*-*-*-*-*-*-*-*-*");
 768                 if (bar_fs == NULL)
 769                         errx(1, "couldn't load font");
 770         }
 771         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 772
 773         XSelectInput(display, root, SubstructureRedirectMask |
 774             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 775             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 776             FocusChangeMask | PropertyChangeMask);
 777
 778         grabkeys();
 779
 780         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 781             bar_height - 2, 1, 0x008080, 0x000000);
 782         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 783         XSetFont(display, bar_gc, bar_fs->fid);
 784         if (bar_enabled) {
 785                 height -= bar_height; /* correct screen height */
 786                 XMapWindow(display, bar_window);
 787         }
 788         bar_print();
 789
 790         while (running) {
 791                 XNextEvent(display, &e);
 792                 if (handler[e.type])
 793                         handler[e.type](&e);
 794         }
 795
 796         XCloseDisplay(display);
 797
 798         return (0);
 799 }