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         if (bar_enabled == 0)
 159                 return;
 160
 161         /* clear old text */
 162         XSetForeground(display, bar_gc, 0x000000);
 163         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 164             strlen(bar_text));
 165
 166         /* draw new text */
 167         time(&tmt);
 168         localtime_r(&tmt, &tm);
 169         strftime(bar_text, sizeof bar_text, "%a %b %d %R %Z %Y", &tm);
 170         XSetForeground(display, bar_gc, 0xa0a0a0);
 171         XDrawString(display, bar_window, bar_gc, 4, bar_fs->ascent, bar_text,
 172             strlen(bar_text));
 173         XSync(display, False);
 174
 175         alarm(60);
 176 }
 177
 178 void
 179 bar_signal(int sig)
 180 {
 181         /* XXX yeah yeah byte me */
 182         bar_print();
 183 }
 184
 185 void
 186 bar_toggle(union arg *args)
 187 {
 188         DNPRINTF(SWM_D_MISC, "bar_toggle\n");
 189
 190         if (bar_enabled) {
 191                 bar_enabled = 0;
 192                 height += bar_height; /* correct screen height */
 193                 XUnmapWindow(display, bar_window);
 194         } else {
 195                 bar_enabled = 1;
 196                 height -= bar_height; /* correct screen height */
 197                 XMapWindow(display, bar_window);
 198         }
 199         XSync(display, False);
 200
 201         stack();
 202         bar_print(); /* must be after stack */
 203 }
 204
 205 void
 206 quit(union arg *args)
 207 {
 208         DNPRINTF(SWM_D_MISC, "quit\n");
 209         running = 0;
 210 }
 211
 212 void
 213 spawn(union arg *args)
 214 {
 215         DNPRINTF(SWM_D_MISC, "spawn: %s\n", args->argv[0]);
 216         /*
 217          * The double-fork construct avoids zombie processes and keeps the code
 218          * clean from stupid signal handlers.
 219          */
 220         if(fork() == 0) {
 221                 if(fork() == 0) {
 222                         if(display)
 223                                 close(ConnectionNumber(display));
 224                         setsid();
 225                         execvp(args->argv[0], args->argv);
 226                         fprintf(stderr, "execvp failed\n");
 227                         perror(" failed");
 228                 }
 229                 exit(0);
 230         }
 231         wait(0);
 232 }
 233
 234 void
 235 focus_win(struct ws_win *win)
 236 {
 237         DNPRINTF(SWM_D_FOCUS, "focus_win: id: %lu\n", win->id);
 238         XSetWindowBorder(display, win->id, col_focus);
 239         XSetInputFocus(display, win->id, RevertToPointerRoot, CurrentTime);
 240         ws[current_ws].focus = win;
 241 }
 242
 243 void
 244 unfocus_win(struct ws_win *win)
 245 {
 246         DNPRINTF(SWM_D_FOCUS, "unfocus_win: id: %lu\n", win->id);
 247         XSetWindowBorder(display, win->id, col_unfocus);
 248         if (ws[current_ws].focus == win)
 249                 ws[current_ws].focus = NULL;
 250 }
 251
 252 void
 253 switchws(union arg *args)
 254 {
 255         int                     wsid = args->id;
 256         struct ws_win           *win;
 257
 258         DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
 259
 260         if (wsid == current_ws)
 261                 return;
 262
 263         /* map new window first to prevent ugly blinking */
 264         TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
 265                 XMapWindow(display, win->id);
 266         ws[wsid].visible = 1;
 267
 268         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
 269                 XUnmapWindow(display, win->id);
 270         ws[current_ws].visible = 0;
 271
 272         current_ws = wsid;
 273
 274         ignore_enter = 1;
 275         if (ws[wsid].restack) {
 276                 stack();
 277         } else {
 278                 if (ws[wsid].focus != NULL)
 279                         focus_win(ws[wsid].focus);
 280                 XSync(display, False);
 281         }
 282 }
 283
 284 void
 285 focus(union arg *args)
 286 {
 287         struct ws_win           *winfocus, *winlostfocus;
 288
 289         DNPRINTF(SWM_D_FOCUS, "focus: id %d\n", args->id);
 290         if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
 291                 return;
 292
 293         winlostfocus = ws[current_ws].focus;
 294
 295         switch (args->id) {
 296         case SWM_ARG_ID_FOCUSPREV:
 297                 ws[current_ws].focus =
 298                     TAILQ_PREV(ws[current_ws].focus, ws_win_list, entry);
 299                 if (ws[current_ws].focus == NULL)
 300                         ws[current_ws].focus =
 301                             TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
 302                 break;
 303
 304         case SWM_ARG_ID_FOCUSNEXT:
 305                 ws[current_ws].focus = TAILQ_NEXT(ws[current_ws].focus, entry);
 306                 if (ws[current_ws].focus == NULL)
 307                         ws[current_ws].focus =
 308                             TAILQ_FIRST(&ws[current_ws].winlist);
 309                 break;
 310
 311         case SWM_ARG_ID_FOCUSMAIN:
 312                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 313                 break;
 314
 315         default:
 316                 return;
 317         }
 318
 319         winfocus = ws[current_ws].focus;
 320         unfocus_win(winlostfocus);
 321         focus_win(winfocus);
 322         XSync(display, False);
 323 }
 324
 325 /* I know this sucks but it works well enough */
 326 void
 327 stack(void)
 328 {
 329         XWindowChanges          wc;
 330         struct ws_win           wf, *win, *winfocus = &wf;
 331         int                     i, h, w, x, y, hrh;
 332
 333         DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
 334
 335         winfocus->id = root;
 336
 337         if (ws[current_ws].winno == 0)
 338                 return;
 339
 340         if (ws[current_ws].winno > 1)
 341                 w = width / 2;
 342         else
 343                 w = width;
 344
 345         if (ws[current_ws].winno > 2)
 346                 hrh = height / (ws[current_ws].winno - 1);
 347         else
 348                 hrh = 0;
 349
 350         x = 0;
 351         y = bar_enabled ? bar_height : 0;
 352         h = height;
 353         i = 0;
 354         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 355                 if (i == 1) {
 356                         x += w + 2;
 357                         w -= 2;
 358                 }
 359                 if (i != 0 && hrh != 0) {
 360                         /* correct the last window for lost pixels */
 361                         if (win == TAILQ_LAST(&ws[current_ws].winlist,
 362                             ws_win_list)) {
 363                                 h = height - (i * hrh);
 364                                 if (h == 0)
 365                                         h = hrh;
 366                                 else
 367                                         h += hrh;
 368                                 y += hrh;
 369                         } else {
 370                                 h = hrh - 2;
 371                                 /* leave first right hand window at y = 0 */
 372                                 if (i > 1)
 373                                         y += h + 2;
 374                         }
 375                 }
 376
 377                 bzero(&wc, sizeof wc);
 378                 win->x = wc.x = x;
 379                 win->y = wc.y = y;
 380                 win->width = wc.width = w;
 381                 win->height = wc.height = h;
 382                 wc.border_width = 1;
 383                 XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
 384                     CWHeight | CWBorderWidth, &wc);
 385                 if (win == ws[current_ws].focus)
 386                         winfocus = win;
 387                 else
 388                         unfocus_win(win);
 389                 XMapWindow(display, win->id);
 390                 i++;
 391         }
 392
 393         focus_win(winfocus); /* this has to be done outside of the loop */
 394         XSync(display, False);
 395 }
 396
 397 void
 398 swap_to_main(union arg *args)
 399 {
 400         struct ws_win           *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
 401
 402         DNPRINTF(SWM_D_MISC, "swap_to_main: win: %lu\n",
 403             ws[current_ws].focus ? ws[current_ws].focus->id : 0);
 404
 405         if (ws[current_ws].focus == NULL || ws[current_ws].focus == tmpwin)
 406                 return;
 407
 408         TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
 409         TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
 410             tmpwin, entry);
 411         TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 412         TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
 413         ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 414         ignore_enter = 2;
 415         stack();
 416 }
 417
 418 void
 419 send_to_ws(union arg *args)
 420 {
 421         int                     wsid = args->id;
 422         struct ws_win           *win = ws[current_ws].focus;
 423
 424         DNPRINTF(SWM_D_WS, "send_to_ws: win: %lu\n", win->id);
 425
 426         XUnmapWindow(display, win->id);
 427
 428         /* find a window to focus */
 429         ws[current_ws].focus = TAILQ_PREV(win, ws_win_list,entry);
 430         if (ws[current_ws].focus == NULL)
 431                 ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
 432
 433         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 434         ws[current_ws].winno--;
 435
 436         TAILQ_INSERT_TAIL(&ws[wsid].winlist, win, entry);
 437         if (ws[wsid].winno == 0)
 438                 ws[wsid].focus = win;
 439         ws[wsid].winno++;
 440         ws[wsid].restack = 1;
 441
 442         stack();
 443 }
 444
 445 /* terminal + args */
 446 char                            *term[] = { "xterm", NULL };
 447
 448 /* key definitions */
 449 struct key {
 450         unsigned int            mod;
 451         KeySym                  keysym;
 452         void                    (*func)(union arg *);
 453         union arg               args;
 454 } keys[] = {
 455         /* modifier             key     function                argument */
 456         { MODKEY,               XK_Return,      swap_to_main,   {0} },
 457         { MODKEY | ShiftMask,   XK_Return,      spawn,          {.argv = term } },
 458         { MODKEY | ShiftMask,   XK_q,           quit,           {0} },
 459         { MODKEY,               XK_m,           focus,          {.id = SWM_ARG_ID_FOCUSMAIN} },
 460         { MODKEY,               XK_1,           switchws,       {.id = 0} },
 461         { MODKEY,               XK_2,           switchws,       {.id = 1} },
 462         { MODKEY,               XK_3,           switchws,       {.id = 2} },
 463         { MODKEY,               XK_4,           switchws,       {.id = 3} },
 464         { MODKEY,               XK_5,           switchws,       {.id = 4} },
 465         { MODKEY,               XK_6,           switchws,       {.id = 5} },
 466         { MODKEY,               XK_7,           switchws,       {.id = 6} },
 467         { MODKEY,               XK_8,           switchws,       {.id = 7} },
 468         { MODKEY,               XK_9,           switchws,       {.id = 8} },
 469         { MODKEY,               XK_0,           switchws,       {.id = 9} },
 470         { MODKEY | ShiftMask,   XK_1,           send_to_ws,     {.id = 0} },
 471         { MODKEY | ShiftMask,   XK_2,           send_to_ws,     {.id = 1} },
 472         { MODKEY | ShiftMask,   XK_3,           send_to_ws,     {.id = 2} },
 473         { MODKEY | ShiftMask,   XK_4,           send_to_ws,     {.id = 3} },
 474         { MODKEY | ShiftMask,   XK_5,           send_to_ws,     {.id = 4} },
 475         { MODKEY | ShiftMask,   XK_6,           send_to_ws,     {.id = 5} },
 476         { MODKEY | ShiftMask,   XK_7,           send_to_ws,     {.id = 6} },
 477         { MODKEY | ShiftMask,   XK_8,           send_to_ws,     {.id = 7} },
 478         { MODKEY | ShiftMask,   XK_9,           send_to_ws,     {.id = 8} },
 479         { MODKEY | ShiftMask,   XK_0,           send_to_ws,     {.id = 9} },
 480         { MODKEY,               XK_b,           bar_toggle,     {0} },
 481         { MODKEY,               XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSNEXT} },
 482         { MODKEY | ShiftMask,   XK_Tab,         focus,          {.id = SWM_ARG_ID_FOCUSPREV} },
 483 };
 484
 485 void
 486 updatenumlockmask(void)
 487 {
 488         unsigned int            i, j;
 489         XModifierKeymap         *modmap;
 490
 491         DNPRINTF(SWM_D_MISC, "updatenumlockmask\n");
 492         numlockmask = 0;
 493         modmap = XGetModifierMapping(display);
 494         for (i = 0; i < 8; i++)
 495                 for (j = 0; j < modmap->max_keypermod; j++)
 496                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
 497                           == XKeysymToKeycode(display, XK_Num_Lock))
 498                                 numlockmask = (1 << i);
 499
 500         XFreeModifiermap(modmap);
 501 }
 502
 503 void
 504 grabkeys(void)
 505 {
 506         unsigned int            i, j;
 507         KeyCode                 code;
 508         unsigned int            modifiers[] =
 509             { 0, LockMask, numlockmask, numlockmask | LockMask };
 510
 511         DNPRINTF(SWM_D_MISC, "grabkeys\n");
 512         updatenumlockmask();
 513
 514         XUngrabKey(display, AnyKey, AnyModifier, root);
 515         for(i = 0; i < LENGTH(keys); i++) {
 516                 if((code = XKeysymToKeycode(display, keys[i].keysym)))
 517                         for(j = 0; j < LENGTH(modifiers); j++)
 518                                 XGrabKey(display, code,
 519                                     keys[i].mod | modifiers[j], root,
 520                                     True, GrabModeAsync, GrabModeAsync);
 521         }
 522 }
 523 void
 524 expose(XEvent *e)
 525 {
 526         DNPRINTF(SWM_D_EVENT, "expose: window: %lu\n", e->xexpose.window);
 527 }
 528
 529 void
 530 keypress(XEvent *e)
 531 {
 532         unsigned int            i;
 533         KeySym                  keysym;
 534         XKeyEvent               *ev = &e->xkey;
 535
 536         DNPRINTF(SWM_D_EVENT, "keypress: window: %lu\n", ev->window);
 537
 538         keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
 539         for(i = 0; i < LENGTH(keys); i++)
 540                 if(keysym == keys[i].keysym
 541                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 542                    && keys[i].func)
 543                         keys[i].func(&(keys[i].args));
 544 }
 545
 546 void
 547 buttonpress(XEvent *e)
 548 {
 549         XButtonPressedEvent     *ev = &e->xbutton;
 550 #ifdef SWM_CLICKTOFOCUS
 551         struct ws_win           *win;
 552 #endif
 553
 554
 555         DNPRINTF(SWM_D_EVENT, "buttonpress: window: %lu\n", ev->window);
 556
 557         if (ev->window == root)
 558                 return;
 559         if (ev->window == ws[current_ws].focus->id)
 560                 return;
 561 #ifdef SWM_CLICKTOFOCUS
 562         TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
 563                 if (win->id == ev->window) {
 564                         /* focus in the clicked window */
 565                         XSetWindowBorder(display, ev->window, 0xff0000);
 566                         XSetWindowBorder(display,
 567                             ws[current_ws].focus->id, 0x888888);
 568                         XSetInputFocus(display, ev->window, RevertToPointerRoot,
 569                             CurrentTime);
 570                         ws[current_ws].focus = win;
 571                         XSync(display, False);
 572                         break;
 573         }
 574 #endif
 575 }
 576
 577 void
 578 configurerequest(XEvent *e)
 579 {
 580         XConfigureRequestEvent  *ev = &e->xconfigurerequest;
 581         struct ws_win           *win;
 582
 583         DNPRINTF(SWM_D_EVENT, "configurerequest: window: %lu\n", ev->window);
 584
 585         XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
 586             FocusChangeMask);
 587
 588         if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
 589                 errx(1, "calloc: failed to allocate memory for new window");
 590
 591         win->id = ev->window;
 592         TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
 593         ws[current_ws].focus = win; /* make new win focused */
 594         ws[current_ws].winno++;
 595         stack();
 596 }
 597
 598 void
 599 configurenotify(XEvent *e)
 600 {
 601         DNPRINTF(SWM_D_EVENT, "configurenotify: window: %lu\n",
 602             e->xconfigure.window);
 603 }
 604
 605 void
 606 destroynotify(XEvent *e)
 607 {
 608         struct ws_win           *win;
 609         XDestroyWindowEvent     *ev = &e->xdestroywindow;
 610
 611         DNPRINTF(SWM_D_EVENT, "destroynotify: window %lu\n", ev->window);
 612
 613         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 614                 if (ev->window == win->id) {
 615                         /* find a window to focus */
 616                         ws[current_ws].focus =
 617                             TAILQ_PREV(win, ws_win_list,entry);
 618                         if (ws[current_ws].focus == NULL)
 619                                 ws[current_ws].focus =
 620                                     TAILQ_FIRST(&ws[current_ws].winlist);
 621
 622                         TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
 623                         free(win);
 624                         ws[current_ws].winno--;
 625                         break;
 626                 }
 627         }
 628
 629         stack();
 630 }
 631
 632 void
 633 enternotify(XEvent *e)
 634 {
 635         XCrossingEvent          *ev = &e->xcrossing;
 636         struct ws_win           *win;
 637
 638         DNPRINTF(SWM_D_EVENT, "enternotify: window: %lu\n", ev->window);
 639
 640         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
 641             ev->window != root)
 642                 return;
 643         if (ignore_enter) {
 644                 /* eat event(s) to prevent autofocus */
 645                 ignore_enter--;
 646                 return;
 647         }
 648         TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
 649                 if (win->id == ev->window)
 650                         focus_win(win);
 651                 else
 652                         unfocus_win(win);
 653         }
 654 }
 655
 656 void
 657 focusin(XEvent *e)
 658 {
 659         XFocusChangeEvent       *ev = &e->xfocus;
 660
 661         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu\n", ev->window);
 662
 663         if (ev->window == root)
 664                 return;
 665
 666         /*
 667          * kill grab for now so that we can cut and paste , this screws up
 668          * click to focus
 669          */
 670         /*
 671         DNPRINTF(SWM_D_EVENT, "focusin: window: %lu grabbing\n", ev->window);
 672         XGrabButton(display, Button1, AnyModifier, ev->window, False,
 673             ButtonPress, GrabModeAsync, GrabModeSync, None, None);
 674         */
 675 }
 676
 677 void
 678 mappingnotify(XEvent *e)
 679 {
 680         XMappingEvent           *ev = &e->xmapping;
 681
 682         DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %lu\n", ev->window);
 683
 684         XRefreshKeyboardMapping(ev);
 685         if(ev->request == MappingKeyboard)
 686                 grabkeys();
 687 }
 688
 689 void
 690 maprequest(XEvent *e)
 691 {
 692         DNPRINTF(SWM_D_EVENT, "maprequest: window: %lu\n",
 693             e->xmaprequest.window);
 694 }
 695
 696 void
 697 propertynotify(XEvent *e)
 698 {
 699         DNPRINTF(SWM_D_EVENT, "propertynotify: window: %lu\n",
 700             e->xproperty.window);
 701 }
 702
 703 void
 704 unmapnotify(XEvent *e)
 705 {
 706         DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %lu\n", e->xunmap.window);
 707 }
 708
 709 void                    (*handler[LASTEvent])(XEvent *) = {
 710                                 [Expose] = expose,
 711                                 [KeyPress] = keypress,
 712                                 [ButtonPress] = buttonpress,
 713                                 [ConfigureRequest] = configurerequest,
 714                                 [ConfigureNotify] = configurenotify,
 715                                 [DestroyNotify] = destroynotify,
 716                                 [EnterNotify] = enternotify,
 717                                 [FocusIn] = focusin,
 718                                 [MappingNotify] = mappingnotify,
 719                                 [MapRequest] = maprequest,
 720                                 [PropertyNotify] = propertynotify,
 721                                 [UnmapNotify] = unmapnotify,
 722 };
 723
 724 int
 725 xerror_start(Display *d, XErrorEvent *ee)
 726 {
 727         other_wm = 1;
 728         return (-1);
 729 }
 730
 731 int
 732 xerror(Display *d, XErrorEvent *ee)
 733 {
 734         fprintf(stderr, "error: %p %p\n", display, ee);
 735
 736         return (-1);
 737 }
 738
 739 int
 740 active_wm(void)
 741 {
 742         other_wm = 0;
 743         xerrorxlib = XSetErrorHandler(xerror_start);
 744
 745         /* this causes an error if some other window manager is running */
 746         XSelectInput(display, DefaultRootWindow(display),
 747             SubstructureRedirectMask);
 748         XSync(display, False);
 749         if(other_wm)
 750                 return (1);
 751
 752         XSetErrorHandler(xerror);
 753         XSync(display, False);
 754         return (0);
 755 }
 756
 757 int
 758 main(int argc, char *argv[])
 759 {
 760         XEvent                  e;
 761         int                     i;
 762
 763         fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
 764         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 765                 warnx("no locale support");
 766
 767         if(!(display = XOpenDisplay(0)))
 768                 errx(1, "can not open display");
 769
 770         if (active_wm())
 771                 errx(1, "other wm running");
 772
 773         screen = DefaultScreen(display);
 774         root = RootWindow(display, screen);
 775         width = DisplayWidth(display, screen) - 2;
 776         height = DisplayHeight(display, screen) - 2;
 777
 778         /* make work space 1 active */
 779         ws[0].visible = 1;
 780         ws[0].restack = 0;
 781         ws[0].focus = NULL;
 782         ws[0].winno = 0;
 783         TAILQ_INIT(&ws[0].winlist);
 784         for (i = 1; i < SWM_WS_MAX; i++) {
 785                 ws[i].visible = 0;
 786                 ws[i].restack = 0;
 787                 ws[i].focus = NULL;
 788                 ws[i].winno = 0;
 789                 TAILQ_INIT(&ws[i].winlist);
 790         }
 791
 792         /* setup status bar */
 793         bar_fs = XLoadQueryFont(display,
 794             "-*-terminus-*-*-*-*-*-*-*-*-*-*-*-*");
 795         if (bar_fs == NULL) {
 796                 /* load a font that is default */
 797                 bar_fs = XLoadQueryFont(display,
 798                     "-*-times-medium-r-*-*-*-*-*-*-*-*-*-*");
 799                 if (bar_fs == NULL)
 800                         errx(1, "couldn't load font");
 801         }
 802         bar_height = bar_fs->ascent + bar_fs->descent + 3;
 803
 804         XSelectInput(display, root, SubstructureRedirectMask |
 805             SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
 806             EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
 807             FocusChangeMask | PropertyChangeMask);
 808
 809         grabkeys();
 810
 811         bar_window = XCreateSimpleWindow(display, root, 0, 0, width,
 812             bar_height - 2, 1, 0x008080, 0x000000);
 813         bar_gc = XCreateGC(display, bar_window, 0, &bar_gcv);
 814         XSetFont(display, bar_gc, bar_fs->fid);
 815         if (bar_enabled) {
 816                 height -= bar_height; /* correct screen height */
 817                 XMapWindow(display, bar_window);
 818         }
 819
 820         if (signal(SIGALRM, bar_signal) == SIG_ERR)
 821                 err(1, "could not install bar_signal");
 822         bar_print();
 823
 824         while (running) {
 825                 XNextEvent(display, &e);
 826                 if (handler[e.type])
 827                         handler[e.type](&e);
 828         }
 829
 830         XCloseDisplay(display);
 831
 832         return (0);
 833 }