scrotwm.c

   1 /* $scrotwm$ */
   2 /*
   3  * Copyright (c) 2009 Marco Peereboom <marco@peereboom.us>
   4  * Copyright (c) 2009 Ryan McBride <mcbride@countersiege.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 /*
  19  * Much code and ideas taken from dwm under the following license:
  20  * MIT/X Consortium License
  21  *
  22  * 2006-2008 Anselm R Garbe <garbeam at gmail dot com>
  23  * 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
  24  * 2006-2007 Jukka Salmi <jukka at salmi dot ch>
  25  * 2007 Premysl Hruby <dfenze at gmail dot com>
  26  * 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
  27  * 2007 Christof Musik <christof at sendfax dot de>
  28  * 2007-2008 Enno Gottox Boland <gottox at s01 dot de>
  29  * 2007-2008 Peter Hartlich <sgkkr at hartlich dot com>
  30  * 2008 Martin Hurton <martin dot hurton at gmail dot com>
  31  *
  32  * Permission is hereby granted, free of charge, to any person obtaining a
  33  * copy of this software and associated documentation files (the "Software"),
  34  * to deal in the Software without restriction, including without limitation
  35  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  36  * and/or sell copies of the Software, and to permit persons to whom the
  37  * Software is furnished to do so, subject to the following conditions:
  38  *
  39  * The above copyright notice and this permission notice shall be included in
  40  * all copies or substantial portions of the Software.
  41  *
  42  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  43  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  44  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  45  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  46  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  47  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  48  * DEALINGS IN THE SOFTWARE.
  49  */
  50
  51 #define SWM_VERSION     "0.5"
  52
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <err.h>
  56 #include <locale.h>
  57 #include <unistd.h>
  58 #include <time.h>
  59 #include <signal.h>
  60 #include <string.h>
  61
  62 #include <sys/types.h>
  63 #include <sys/wait.h>
  64 #include <sys/queue.h>
  65
  66 #include <X11/cursorfont.h>
  67 #include <X11/keysym.h>
  68 #include <X11/Xatom.h>
  69 #include <X11/Xlib.h>
  70 #include <X11/Xproto.h>
  71 #include <X11/Xutil.h>
  72
  73 /* #define SWM_DEBUG */
  74 #ifdef SWM_DEBUG
  75 #define DPRINTF(x...)           do { if (swm_debug) fprintf(stderr, x); } while(0)
  76 #define DNPRINTF(n,x...)        do { if (swm_debug & n) fprintf(stderr, x); } while(0)
  77 #define SWM_D_EVENT             0x0001
  78 #define SWM_D_WS                0x0002
  79 #define SWM_D_FOCUS             0x0004
  80 #define SWM_D_MISC              0x0008
  81
  82 uint32_t                swm_debug = 0
  83                             | SWM_D_EVENT
  84                             | SWM_D_WS
  85                             | SWM_D_FOCUS
  86                             | SWM_D_MISC
  87                             ;
  88 #else
  89 #define DPRINTF(x...)
  90 #define DNPRINTF(n,x...)
  91 #endif
  92
  93 #define LENGTH(x)               (sizeof x / sizeof x[0])
  94 #define MODKEY                  Mod1Mask
  95 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  96
  97 int                     (*xerrorxlib)(Display *, XErrorEvent *);
  98 int                     other_wm;
  99 int                     screen;
 100 int                     width, height;
 101 int                     running = 1;
 102 int                     ignore_enter = 0;
 103 unsigned int            numlockmask = 0;
 104 unsigned long           col_focus = 0xff0000;   /* XXX should this be per ws? */
 105 unsigned long           col_unfocus = 0x888888;
 106 Display                 *display;
 107 Window                  root;
 108
 109 /* status bar */
 110 int                     bar_enabled = 1;
 111 int                     bar_height = 12;
 112 Window                  bar_window;
 113 GC                      bar_gc;
 114 XGCValues               bar_gcv;
 115 XFontStruct             *bar_fs;
 116 char                    bar_text[128];
 117
 118 struct ws_win {
 119         TAILQ_ENTRY(ws_win)     entry;
 120         Window                  id;
 121         int                     x;
 122         int                     y;
 123         int                     width;
 124         int                     height;
 125 };
 126
 127 TAILQ_HEAD(ws_win_list, ws_win);
 128
 129 /* define work spaces */
 130 #define SWM_WS_MAX              (10)
 131 struct workspace {
 132         int                     visible;        /* workspace visible */
 133         int                     restack;        /* restack on switch */
 134         struct ws_win           *focus;         /* which win has focus */
 135         int                     winno;          /* total nr of windows */
 136         struct ws_win_list      winlist;        /* list of windows in ws */
 137 } ws[SWM_WS_MAX];
 138 int                     current_ws = 0;
 139
 140 /* args to functions */
 141 union arg {
 142         int                     id;
 143 #define SWM_ARG_ID_FOCUSNEXT    (0)
 144 #define SWM_ARG_ID_FOCUSPREV    (1)
 145 #define SWM_ARG_ID_FOCUSMAIN    (2)
 146         char                    **argv;
 147 };
 148
 149
 150 void    stack(void);
 151
 152 void
 153 bar_print(void)
 154 {
 155         time_t                  tmt;
 156         struct tm               tm;
 157
 158         /* clear old text */
 159         XSetForeground(display, bar_gc, 0x000000);
 160         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 161             strlen(bar_text));
 162
 163         /* draw new text */
 164         time(&tmt);
 165         localtime_r(&tmt, &tm);
 166         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 167         XSetForeground(display, bar_gc, 0xa0a0a0);
 168         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 169             strlen(bar_text));
 170         XSync(display, False);
 171
 172         alarm(60);
 173 }
 174
 175 void
 176 bar_signal(int sig)
 177 {
 178         /* XXX yeah yeah byte me */
 179         bar_print();
 180 }
 181
 182 void
 183 quit(union arg *args)
 184 {
 185         DNPRINTF(SWM_D_MISC, "quit\n");
 186         running = 0;
 187 }
 188
 189 void
 190 spawn(union arg *args)
 191 {
 192         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 193         /*
 194          * The double-fork construct avoids zombie processes and keeps the code
 195          * clean from stupid signal handlers.
 196          */
 197         if(fork() == 0) {
 198                 if(fork() == 0) {
 199                         if(display)
 200                                 close(ConnectionNumber(display));
 201                         setsid();
 202                         execvp(args->argv[0], args->argv);
 203                         fprintf(stderr, "execvp failed\n");
 204                         perror(" failed");
 205                 }
 206                 exit(0);
 207         }
 208         wait(0);
 209 }
 210
 211 void
 212 focus_win(struct ws_win *win)
 213 {
 214         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %lu\n", win->id);
 215         XSetWindowBorder(display, win->id, col_focus);
 216         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 217         ws[current_ws].focus = win;
 218 }
 219
 220 void
 221 unfocus_win(struct ws_win *win)
 222 {
 223         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %lu\n", win->id);
 224         XSetWindowBorder(display, win->id, col_unfocus);
 225         if (ws[current_ws].focus == win)
 226                 ws[current_ws].focus = NULL;
 227 }
 228
 229 void
 230 switchws(union arg *args)
 231 {
 232         int                     wsid = args->id;
 233         struct ws_win           *win;
 234
 235         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 236
 237         if (wsid == current_ws)
 238                 return;
 239
 240         /* map new window first to prevent ugly blinking */
 241         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 242                 XMapWindow(display, win->id);
 243         ws[wsid].visible = 1;
 244
 245         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 246                 XUnmapWindow(display, win->id);
 247         ws[current_ws].visible = 0;
 248
 249         current_ws = wsid;
 250
 251         ignore_enter = 1;
 252         if (ws[wsid].restack) {
 253                 stack();
 254         } else {
 255                 if (ws[wsid].focus != NULL)
 256                         focus_win(ws[wsid].focus);
 257                 XSync(display, False);
 258         }
 259 }
 260
 261 void
 262 focus(union arg *args)
 263 {
 264         struct ws_win           *winfocus, *winlostfocus;
 265
 266         DNPRINTF(SWM_D_FOCUS, "focus: id %d\n", args->id);
 267         if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
 268                 return;
 269
 270         winlostfocus = ws[current_ws].focus;
 271
 272         switch (args->id) {
 273         case SWM_ARG_ID_FOCUSPREV:
 274                 if (ws[current_ws].focus ==
 275                     TAILQ_FIRST(&ws[current_ws].winlist))
 276                         ws[current_ws].focus =
 277                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 278                 else
 279                         ws[current_ws].focus =TAILQ_PREV(ws[current_ws].focus,
 280                             ws_win_list, entry);
 281                 break;
 282
 283         case SWM_ARG_ID_FOCUSNEXT:
 284                 if (ws[current_ws].focus == TAILQ_LAST(&ws[current_ws].winlist,
 285                     ws_win_list))
 286                         ws[current_ws].focus =
 287                             TAILQ_FIRST(&ws[current_ws].winlist);
 288                 else
 289                         ws[current_ws].focus =
 290                             TAILQ_NEXT(ws[current_ws].focus, entry);
 291                 break;
 292
 293         case SWM_ARG_ID_FOCUSMAIN:
 294                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);;
 295                 break;
 296
 297         default:
 298                 return;
 299         }
 300
 301         winfocus = ws[current_ws].focus;
 302         unfocus_win(winlostfocus);
 303         focus_win(winfocus);
 304         XSync(display, False);
 305 }
 306
 307 /* I know this sucks but it works well enough */
 308 void
 309 stack(void)
 310 {
 311         XWindowChanges          wc;
 312         struct ws_win           wf, *win, *winfocus = &wf;
 313         int                     i, h, w, x, y, hrh;
 314
 315         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 316
 317         winfocus->id = root;
 318
 319         if (ws[current_ws].winno == 0)
 320                 return;
 321
 322         if (ws[current_ws].winno > 1)
 323                 w = width / 2;
 324         else
 325                 w = width;
 326
 327         if (ws[current_ws].winno > 2)
 328                 hrh = height / (ws[current_ws].winno - 1);
 329         else
 330                 hrh = 0;
 331
 332         x = 0;
 333         y = bar_height;
 334         h = height;
 335         i = 0;
 336         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 337                 if (i == 1) {
 338                         x += w + 2;
 339                         w -= 2;
 340                 }
 341                 if (i != 0 && hrh != 0) {
 342                         /* correct the last window for lost pixels */
 343                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 344                             ws_win_list)) {
 345                                 h = height - (i * hrh);
 346                                 if (h == 0)
 347                                         h = hrh;
 348                                 else
 349                                         h += hrh;
 350                                 y += hrh;
 351                         } else {
 352                                 h = hrh - 2;
 353                                 /* leave first right hand window at y = 0 */
 354                                 if (i > 1)
 355                                         y += h + 2;
 356                         }
 357                 }
 358
 359                 bzero(&wc, sizeof wc);
 360                 win->x = wc.x = x;
 361                 win->y = wc.y = y;
 362                 win->width = wc.width = w;
 363                 win->height = wc.height = h;
 364                 wc.border_width = 1;
 365                 XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
 366                     CWHeight | CWBorderWidth, &wc);
 367                 if (win == ws[current_ws].focus)
 368                         winfocus = win;
 369                 else
 370                         unfocus_win(win);
 371                 XMapWindow(display, win->id);
 372                 i++;
 373         }
 374
 375         focus_win(winfocus); /* this has to be done outside of the loop */
 376         XSync(display, False);
 377 }
 378
 379 void
 380 swap_to_main(union arg *args)
 381 {
 382         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 383
 384         DNPRINTF(SWM_D_MISC, "swap_to_main: win: %lu\n",
 385             ws[current_ws].focus ? ws[current_ws].focus->id : 0);
 386
 387         if (ws[current_ws].focus == NULL || ws[current_ws].focus == tmpwin)
 388                 return;
 389
 390         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 391         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 392             tmpwin, entry);
 393         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 394         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 395         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 396         ignore_enter = 2;
 397         stack();
 398 }
 399
 400 void
 401 send_to_ws(union arg *args)
 402 {
 403         int                     wsid = args->id;
 404         struct ws_win           *win = ws[current_ws].focus;
 405
 406         DNPRINTF(SWM_D_WS, "send_to_ws: win: %lu\n", win->id);
 407
 408         XUnmapWindow(display, win->id);
 409
 410         /* find a window to focus */
 411         ws[current_ws].focus = TAILQ_PREV(win, ws_win_list,entry);
 412         if (ws[current_ws].focus == NULL)
 413                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 414
 415         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 416         ws[current_ws].winno--;
 417
 418         TAILQ_INSERT_TAIL(&ws[wsid].winlist, win, entry);
 419         if (ws[wsid].winno == 0)
 420                 ws[wsid].focus = win;
 421         ws[wsid].winno++;
 422         ws[wsid].restack = 1;
 423
 424         stack();
 425 }
 426
 427
 428 /* terminal + args */
 429 char                            *term[] = { "xterm", NULL };
 430
 431 /* key definitions */
 432 struct key {
 433         unsigned int            mod;
 434         KeySym                  keysym;
 435         void                    (*func)(union arg *);
 436         union arg               args;
 437 } keys[] = {
 438         /* modifier             key     function                argument */
 439         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 440         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = term } },
 441         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 442         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 443         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 444         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 445         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 446         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 447         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 448         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 449         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 450         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 451         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 452         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 453         { MODKEY | ShiftMask,   XK_1,           send_to_ws,     {.id = 0} },
 454         { MODKEY | ShiftMask,   XK_2,           send_to_ws,     {.id = 1} },
 455         { MODKEY | ShiftMask,   XK_3,           send_to_ws,     {.id = 2} },
 456         { MODKEY | ShiftMask,   XK_4,           send_to_ws,     {.id = 3} },
 457         { MODKEY | ShiftMask,   XK_5,           send_to_ws,     {.id = 4} },
 458         { MODKEY | ShiftMask,   XK_6,           send_to_ws,     {.id = 5} },
 459         { MODKEY | ShiftMask,   XK_7,           send_to_ws,     {.id = 6} },
 460         { MODKEY | ShiftMask,   XK_8,           send_to_ws,     {.id = 7} },
 461         { MODKEY | ShiftMask,   XK_9,           send_to_ws,     {.id = 8} },
 462         { MODKEY | ShiftMask,   XK_0,           send_to_ws,     {.id = 9} },
 463         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 464         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 465         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 466 };
 467
 468 void
 469 updatenumlockmask(void)
 470 {
 471         unsigned int            i, j;
 472         XModifierKeymap         *modmap;
 473
 474         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 475         numlockmask = 0;
 476         modmap = XGetModifierMapping(display);
 477         for (i = 0; i < 8; i++)
 478                 for (j = 0; j < modmap->max_keypermod; j++)
 479                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 480                           == XKeysymToKeycode(display, XK_Num_Lock))
 481                                 numlockmask = (1 << i);
 482
 483         XFreeModifiermap(modmap);
 484 }
 485
 486 void
 487 grabkeys(void)
 488 {
 489         unsigned int            i, j;
 490         KeyCode                 code;
 491         unsigned int            modifiers[] =
 492             { 0, LockMask, numlockmask, numlockmask | LockMask };
 493
 494         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 495         updatenumlockmask();
 496
 497         XUngrabKey(display, AnyKey, AnyModifier, root);
 498         for(i = 0; i < LENGTH(keys); i++) {
 499                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 500                         for(j = 0; j < LENGTH(modifiers); j++)
 501                                 XGrabKey(display, code,
 502                                     keys[i].mod | modifiers[j], root,
 503                                     True, GrabModeAsync, GrabModeAsync);
 504         }
 505 }
 506 void
 507 expose(XEvent *e)
 508 {
 509         DNPRINTF(SWM_D_EVENT, "expose: window: %lu\n", e->xexpose.window);
 510 }
 511
 512 void
 513 keypress(XEvent *e)
 514 {
 515         unsigned int            i;
 516         KeySym                  keysym;
 517         XKeyEvent               *ev = &e->xkey;
 518
 519         DNPRINTF(SWM_D_EVENT, "keypress: window: %lu\n", ev->window);
 520
 521         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 522         for(i = 0; i < LENGTH(keys); i++)
 523                 if(keysym == keys[i].keysym
 524                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 525                    && keys[i].func)
 526                         keys[i].func(&(keys[i].args));
 527 }
 528
 529 void
 530 buttonpress(XEvent *e)
 531 {
 532         XButtonPressedEvent     *ev = &e->xbutton;
 533 #ifdef SWM_CLICKTOFOCUS
 534         struct ws_win           *win;
 535 #endif
 536
 537
 538         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %lu\n", ev->window);
 539
 540         if (ev->window == root)
 541                 return;
 542         if (ev->window == ws[current_ws].focus->id)
 543                 return;
 544 #ifdef SWM_CLICKTOFOCUS
 545         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 546                 if (win->id == ev->window) {
 547                         /* focus in the clicked window */
 548                         XSetWindowBorder(display, ev->window, 0xff0000);
 549                         XSetWindowBorder(display,
 550                             ws[current_ws].focus->id, 0x888888);
 551                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 552                             CurrentTime);
 553                         ws[current_ws].focus = win;
 554                         XSync(display, False);
 555                         break;
 556         }
 557 #endif
 558 }
 559
 560 void
 561 configurerequest(XEvent *e)
 562 {
 563         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 564         struct ws_win           *win;
 565
 566         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %lu\n", ev->window);
 567
 568         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 569             FocusChangeMask);
 570
 571         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 572                 errx(1, "calloc: failed to allocate memory for new window");
 573
 574         win->id = ev->window;
 575         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 576         ws[current_ws].focus = win; /* make new win focused */
 577         ws[current_ws].winno++;
 578         stack();
 579 }
 580
 581 void
 582 configurenotify(XEvent *e)
 583 {
 584         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %lu\n",
 585             e->xconfigure.window);
 586 }
 587
 588 void
 589 destroynotify(XEvent *e)
 590 {
 591         struct ws_win           *win;
 592         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 593
 594         DNPRINTF(SWM_D_EVENT, "destroynotify: window %lu\n", ev->window);
 595
 596         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 597                 if (ev->window == win->id) {
 598                         /* find a window to focus */
 599                         ws[current_ws].focus =
 600                             TAILQ_PREV(win, ws_win_list,entry);
 601                         if (ws[current_ws].focus == NULL)
 602                                 ws[current_ws].focus =
 603                                     TAILQ_FIRST(&ws[current_ws].winlist);
 604
 605                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 606                         free(win);
 607                         ws[current_ws].winno--;
 608                         break;
 609                 }
 610         }
 611
 612         stack();
 613 }
 614
 615 void
 616 enternotify(XEvent *e)
 617 {
 618         XCrossingEvent          *ev = &e->xcrossing;
 619         struct ws_win           *win;
 620
 621         DNPRINTF(SWM_D_EVENT, "enternotify: window: %lu\n", ev->window);
 622
 623         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 624             ev->window != root)
 625                 return;
 626         if (ignore_enter) {
 627                 /* eat event(s) to prevent autofocus */
 628                 ignore_enter--;
 629                 return;
 630         }
 631         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 632                 if (win->id == ev->window)
 633                         focus_win(win);
 634                 else
 635                         unfocus_win(win);
 636         }
 637 }
 638
 639 void
 640 focusin(XEvent *e)
 641 {
 642         XFocusChangeEvent       *ev = &e->xfocus;
 643
 644         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu\n", ev->window);
 645
 646         if (ev->window == root)
 647                 return;
 648
 649         /*
 650          * kill grab for now so that we can cut and paste , this screws up
 651          * click to focus
 652          */
 653         /*
 654         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu grabbing\n", ev->window);
 655         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 656             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 657         */
 658 }
 659
 660 void
 661 mappingnotify(XEvent *e)
 662 {
 663         XMappingEvent           *ev = &e->xmapping;
 664
 665         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %lu\n", ev->window);
 666
 667         XRefreshKeyboardMapping(ev);
 668         if(ev->request == MappingKeyboard)
 669                 grabkeys();
 670 }
 671
 672 void
 673 maprequest(XEvent *e)
 674 {
 675         DNPRINTF(SWM_D_EVENT, "maprequest: window: %lu\n",
 676             e->xmaprequest.window);
 677 }
 678
 679 void
 680 propertynotify(XEvent *e)
 681 {
 682         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %lu\n",
 683             e->xproperty.window);
 684 }
 685
 686 void
 687 unmapnotify(XEvent *e)
 688 {
 689         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %lu\n", e->xunmap.window);
 690 }
 691
 692 void                    (*handler[LASTEvent])(XEvent *) = {
 693                                 [Expose] = expose,
 694                                 [KeyPress] = keypress,
 695                                 [ButtonPress] = buttonpress,
 696                                 [ConfigureRequest] = configurerequest,
 697                                 [ConfigureNotify] = configurenotify,
 698                                 [DestroyNotify] = destroynotify,
 699                                 [EnterNotify] = enternotify,
 700                                 [FocusIn] = focusin,
 701                                 [MappingNotify] = mappingnotify,
 702                                 [MapRequest] = maprequest,
 703                                 [PropertyNotify] = propertynotify,
 704                                 [UnmapNotify] = unmapnotify,
 705 };
 706
 707 int
 708 xerror_start(Display *d, XErrorEvent *ee)
 709 {
 710         other_wm = 1;
 711         return (-1);
 712 }
 713
 714 int
 715 xerror(Display *d, XErrorEvent *ee)
 716 {
 717         fprintf(stderr, "error: %p %p\n", display, ee);
 718
 719         return (-1);
 720 }
 721
 722 int
 723 active_wm(void)
 724 {
 725         other_wm = 0;
 726         xerrorxlib = XSetErrorHandler(xerror_start);
 727
 728         /* this causes an error if some other window manager is running */
 729         XSelectInput(display, DefaultRootWindow(display),
 730             SubstructureRedirectMask);
 731         XSync(display, False);
 732         if(other_wm)
 733                 return (1);
 734
 735         XSetErrorHandler(xerror);
 736         XSync(display, False);
 737         return (0);
 738 }
 739
 740 int
 741 main(int argc, char *argv[])
 742 {
 743         XEvent                  e;
 744         int                     i;
 745
 746         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 747         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 748                 warnx("no locale support");
 749
 750         if(!(display = XOpenDisplay(0)))
 751                 errx(1, "can not open display");
 752
 753         if (active_wm())
 754                 errx(1, "other wm running");
 755
 756         screen = DefaultScreen(display);
 757         root = RootWindow(display, screen);
 758         width = DisplayWidth(display, screen) - 2;
 759         height = DisplayHeight(display, screen) - 2;
 760
 761         /* make work space 1 active */
 762         ws[0].visible = 1;
 763         ws[0].restack = 0;
 764         ws[0].focus = NULL;
 765         ws[0].winno = 0;
 766         TAILQ_INIT(&ws[0].winlist);
 767         for (i = 1; i < SWM_WS_MAX; i++) {
 768                 ws[i].visible = 0;
 769                 ws[i].restack = 0;
 770                 ws[i].focus = NULL;
 771                 ws[i].winno = 0;
 772                 TAILQ_INIT(&ws[i].winlist);
 773         }
 774
 775         /* setup status bar */
 776         bar_fs = XLoadQueryFont(display,
 777             "-*-terminus-*-*-*-*-*-*-*-*-*-*-*-*");
 778         if (bar_fs == NULL) {
 779                 /* load a font that is default */
 780                 bar_fs = XLoadQueryFont(display,
 781                     "-*-times-medium-r-*-*-*-*-*-*-*-*-*-*");
 782                 if (bar_fs == NULL)
 783                         errx(1, "couldn't load font");
 784         }
 785         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 786
 787         XSelectInput(display, root, SubstructureRedirectMask |
 788             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 789             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 790             FocusChangeMask | PropertyChangeMask);
 791
 792         grabkeys();
 793
 794         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 795             bar_height - 2, 1, 0x008080, 0x000000);
 796         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 797         XSetFont(display, bar_gc, bar_fs->fid);
 798         if (bar_enabled) {
 799                 height -= bar_height; /* correct screen height */
 800                 XMapWindow(display, bar_window);
 801         }
 802
 803         if (signal(SIGALRM, bar_signal) == SIG_ERR)
 804                 err(1, "could not install bar_signal");
 805         bar_print();
 806
 807         while (running) {
 808                 XNextEvent(display, &e);
 809                 if (handler[e.type])
 810                         handler[e.type](&e);
 811         }
 812
 813         XCloseDisplay(display);
 814
 815         return (0);
 816 }