Dogcows Code - chaz/openbox/blob - src/BaseDisplay.cc

   1 // BaseDisplay.cc for Openbox
   2 // Copyright (c) 2001 Sean 'Shaleh' Perry <shaleh@debian.org>
   3 // Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a
   6 // copy of this software and associated documentation files (the "Software"),
   7 // to deal in the Software without restriction, including without limitation
   8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 // and/or sell copies of the Software, and to permit persons to whom the
  10 // Software is furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 // DEALINGS IN THE SOFTWARE.
  22
  23 // stupid macros needed to access some functions in version 2 of the GNU C
  24 // library
  25 #ifndef   _GNU_SOURCE
  26 #define   _GNU_SOURCE
  27 #endif // _GNU_SOURCE
  28
  29 #ifdef    HAVE_CONFIG_H
  30 #  include "../config.h"
  31 #endif // HAVE_CONFIG_H
  32
  33 #include <X11/Xlib.h>
  34 #include <X11/Xatom.h>
  35 #include <X11/Xutil.h>
  36 #include <X11/cursorfont.h>
  37 #include <X11/keysym.h>
  38
  39 #ifdef    SHAPE
  40 #  include <X11/extensions/shape.h>
  41 #endif // SHAPE
  42
  43 #ifdef    HAVE_FCNTL_H
  44 #  include <fcntl.h>
  45 #endif // HAVE_FCNTL_H
  46
  47 #ifdef    HAVE_STDIO_H
  48 #  include <stdio.h>
  49 #endif // HAVE_STDIO_H
  50
  51 #ifdef    HAVE_STDLIB_H
  52 #  include <stdlib.h>
  53 #endif // HAVE_STDLIB_H
  54
  55 #ifdef    HAVE_STRING_H
  56 #  include <string.h>
  57 #endif // HAVE_STRING_H
  58
  59 #ifdef    HAVE_UNISTD_H
  60 #  include <sys/types.h>
  61 #  include <unistd.h>
  62 #endif // HAVE_UNISTD_H
  63
  64 #ifdef    HAVE_SYS_SELECT_H
  65 #  include <sys/select.h>
  66 #endif // HAVE_SYS_SELECT_H
  67
  68 #ifdef    HAVE_SIGNAL_H
  69 #  include <signal.h>
  70 #endif // HAVE_SIGNAL_H
  71
  72 #ifndef   SA_NODEFER
  73 #  ifdef   SA_INTERRUPT
  74 #    define SA_NODEFER SA_INTERRUPT
  75 #  else // !SA_INTERRUPT
  76 #    define SA_NODEFER (0)
  77 #  endif // SA_INTERRUPT
  78 #endif // SA_NODEFER
  79
  80 #ifdef    HAVE_SYS_WAIT_H
  81 #  include <sys/types.h>
  82 #  include <sys/wait.h>
  83 #endif // HAVE_SYS_WAIT_H
  84
  85 #if defined(HAVE_PROCESS_H) && defined(__EMX__)
  86 #  include <process.h>
  87 #endif //   HAVE_PROCESS_H             __EMX__
  88
  89 #include "i18n.h"
  90 #include "BaseDisplay.h"
  91 #include "LinkedList.h"
  92 #include "Timer.h"
  93
  94 // X error handler to handle any and all X errors while the application is
  95 // running
  96 static Bool internal_error = False;
  97 static Window last_bad_window = None;
  98
  99 BaseDisplay *base_display;
 100
 101 static int handleXErrors(Display *d, XErrorEvent *e) {
 102 #ifdef    DEBUG
 103   char errtxt[128];
 104
 105   XGetErrorText(d, e->error_code, errtxt, 128);
 106   fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayXError,
 107                      "%s:  X error: %s(%d) opcodes %d/%d\n  resource 0x%lx\n"),
 108           base_display->getApplicationName(), errtxt, e->error_code,
 109           e->request_code, e->minor_code, e->resourceid);
 110 #endif // DEBUG
 111
 112   if (e->error_code == BadWindow) last_bad_window = e->resourceid;
 113   if (internal_error) abort();
 114
 115   return(False);
 116 }
 117
 118
 119 // signal handler to allow for proper and gentle shutdown
 120
 121 #ifndef   HAVE_SIGACTION
 122 static RETSIGTYPE signalhandler(int sig) {
 123 #else //  HAVE_SIGACTION
 124 static void signalhandler(int sig) {
 125 #endif // HAVE_SIGACTION
 126
 127   static int re_enter = 0;
 128
 129   switch (sig) {
 130   case SIGCHLD:
 131     int status;
 132     waitpid(-1, &status, WNOHANG | WUNTRACED);
 133
 134 #ifndef   HAVE_SIGACTION
 135     // assume broken, braindead sysv signal semantics
 136     signal(SIGCHLD, (RETSIGTYPE (*)(int)) signalhandler);
 137 #endif // HAVE_SIGACTION
 138
 139     break;
 140
 141   default:
 142     if (base_display->handleSignal(sig)) {
 143
 144 #ifndef   HAVE_SIGACTION
 145       // assume broken, braindead sysv signal semantics
 146       signal(sig, (RETSIGTYPE (*)(int)) signalhandler);
 147 #endif // HAVE_SIGACTION
 148
 149       return;
 150     }
 151
 152     fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplaySignalCaught,
 153                                      "%s:  signal %d caught\n"),
 154             base_display->getApplicationName(), sig);
 155
 156     if (! base_display->isStartup() && ! re_enter) {
 157       internal_error = True;
 158
 159       re_enter = 1;
 160       fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayShuttingDown,
 161                                        "shutting down\n"));
 162       base_display->shutdown();
 163     }
 164
 165     if (sig != SIGTERM && sig != SIGINT) {
 166       fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayAborting,
 167                                        "aborting... dumping core\n"));
 168       abort();
 169     }
 170
 171     exit(0);
 172
 173     break;
 174   }
 175 }
 176
 177
 178 // convenience functions
 179 #ifndef    __EMX__
 180 void bexec(const char *command, char* displaystring) {
 181   if (! fork()) {
 182     setsid();
 183     putenv(displaystring);
 184     execl("/bin/sh", "/bin/sh", "-c", command, NULL);
 185     exit(0);
 186   }
 187 }
 188 #endif // !__EMX__
 189
 190 char *bstrdup(const char *s) {
 191   const int l = strlen(s) + 1;
 192   char *n = new char[l];
 193   strncpy(n, s, l);
 194   return n;
 195 }
 196
 197 BaseDisplay::BaseDisplay(const char *app_name, char *dpy_name) {
 198   application_name = bstrdup(app_name);
 199
 200   _startup = True;
 201   _shutdown = False;
 202   server_grabs = 0;
 203   last_bad_window = None;
 204
 205   ::base_display = this;
 206
 207 #ifdef    HAVE_SIGACTION
 208   struct sigaction action;
 209
 210   action.sa_handler = signalhandler;
 211   action.sa_mask = sigset_t();
 212   action.sa_flags = SA_NOCLDSTOP | SA_NODEFER;
 213
 214   sigaction(SIGPIPE, &action, NULL);
 215   sigaction(SIGSEGV, &action, NULL);
 216   sigaction(SIGFPE, &action, NULL);
 217   sigaction(SIGTERM, &action, NULL);
 218   sigaction(SIGINT, &action, NULL);
 219   sigaction(SIGCHLD, &action, NULL);
 220   sigaction(SIGHUP, &action, NULL);
 221   sigaction(SIGUSR1, &action, NULL);
 222   sigaction(SIGUSR2, &action, NULL);
 223 #else // !HAVE_SIGACTION
 224   signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler);
 225   signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler);
 226   signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler);
 227   signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler);
 228   signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler);
 229   signal(SIGUSR1, (RETSIGTYPE (*)(int)) signalhandler);
 230   signal(SIGUSR2, (RETSIGTYPE (*)(int)) signalhandler);
 231   signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler);
 232   signal(SIGCHLD, (RETSIGTYPE (*)(int)) signalhandler);
 233 #endif // HAVE_SIGACTION
 234
 235   if (! (display = XOpenDisplay(dpy_name))) {
 236     fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayXConnectFail,
 237                "BaseDisplay::BaseDisplay: connection to X server failed.\n"));
 238     ::exit(2);
 239   } else if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
 240     fprintf(stderr,
 241             i18n->getMessage(BaseDisplaySet, BaseDisplayCloseOnExecFail,
 242                "BaseDisplay::BaseDisplay: couldn't mark display connection "
 243                "as close-on-exec\n"));
 244     ::exit(2);
 245   }
 246
 247   number_of_screens = ScreenCount(display);
 248   display_name = XDisplayName(dpy_name);
 249
 250 #ifdef    SHAPE
 251   shape.extensions = XShapeQueryExtension(display, &shape.event_basep,
 252                                           &shape.error_basep);
 253 #else // !SHAPE
 254   shape.extensions = False;
 255 #endif // SHAPE
 256
 257   xa_wm_colormap_windows =
 258     XInternAtom(display, "WM_COLORMAP_WINDOWS", False);
 259   xa_wm_protocols = XInternAtom(display, "WM_PROTOCOLS", False);
 260   xa_wm_state = XInternAtom(display, "WM_STATE", False);
 261   xa_wm_change_state = XInternAtom(display, "WM_CHANGE_STATE", False);
 262   xa_wm_delete_window = XInternAtom(display, "WM_DELETE_WINDOW", False);
 263   xa_wm_take_focus = XInternAtom(display, "WM_TAKE_FOCUS", False);
 264   motif_wm_hints = XInternAtom(display, "_MOTIF_WM_HINTS", False);
 265
 266   openbox_hints = XInternAtom(display, "_BLACKBOX_HINTS", False);
 267   openbox_attributes = XInternAtom(display, "_BLACKBOX_ATTRIBUTES", False);
 268   openbox_change_attributes =
 269     XInternAtom(display, "_BLACKBOX_CHANGE_ATTRIBUTES", False);
 270
 271   openbox_structure_messages =
 272     XInternAtom(display, "_BLACKBOX_STRUCTURE_MESSAGES", False);
 273   openbox_notify_startup =
 274     XInternAtom(display, "_BLACKBOX_NOTIFY_STARTUP", False);
 275   openbox_notify_window_add =
 276     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_ADD", False);
 277   openbox_notify_window_del =
 278     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_DEL", False);
 279   openbox_notify_current_workspace =
 280     XInternAtom(display, "_BLACKBOX_NOTIFY_CURRENT_WORKSPACE", False);
 281   openbox_notify_workspace_count =
 282     XInternAtom(display, "_BLACKBOX_NOTIFY_WORKSPACE_COUNT", False);
 283   openbox_notify_window_focus =
 284     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_FOCUS", False);
 285   openbox_notify_window_raise =
 286     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_RAISE", False);
 287   openbox_notify_window_lower =
 288     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_LOWER", False);
 289
 290   openbox_change_workspace =
 291     XInternAtom(display, "_BLACKBOX_CHANGE_WORKSPACE", False);
 292   openbox_change_window_focus =
 293     XInternAtom(display, "_BLACKBOX_CHANGE_WINDOW_FOCUS", False);
 294   openbox_cycle_window_focus =
 295     XInternAtom(display, "_BLACKBOX_CYCLE_WINDOW_FOCUS", False);
 296
 297 #ifdef    NEWWMSPEC
 298
 299   net_supported = XInternAtom(display, "_NET_SUPPORTED", False);
 300   net_client_list = XInternAtom(display, "_NET_CLIENT_LIST", False);
 301   net_client_list_stacking = XInternAtom(display, "_NET_CLIENT_LIST_STACKING", False);
 302   net_number_of_desktops = XInternAtom(display, "_NET_NUMBER_OF_DESKTOPS", False);
 303   net_desktop_geometry = XInternAtom(display, "_NET_DESKTOP_GEOMETRY", False);
 304   net_desktop_viewport = XInternAtom(display, "_NET_DESKTOP_VIEWPORT", False);
 305   net_current_desktop = XInternAtom(display, "_NET_CURRENT_DESKTOP", False);
 306   net_desktop_names = XInternAtom(display, "_NET_DESKTOP_NAMES", False);
 307   net_active_window = XInternAtom(display, "_NET_ACTIVE_WINDOW", False);
 308   net_workarea = XInternAtom(display, "_NET_WORKAREA", False);
 309   net_supporting_wm_check = XInternAtom(display, "_NET_SUPPORTING_WM_CHECK", False);
 310   net_virtual_roots = XInternAtom(display, "_NET_VIRTUAL_ROOTS", False);
 311
 312   net_close_window = XInternAtom(display, "_NET_CLOSE_WINDOW", False);
 313   net_wm_moveresize = XInternAtom(display, "_NET_WM_MOVERESIZE", False);
 314
 315   net_properties = XInternAtom(display, "_NET_PROPERTIES", False);
 316   net_wm_name = XInternAtom(display, "_NET_WM_NAME", False);
 317   net_wm_desktop = XInternAtom(display, "_NET_WM_DESKTOP", False);
 318   net_wm_window_type = XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
 319   net_wm_state = XInternAtom(display, "_NET_WM_STATE", False);
 320   net_wm_strut = XInternAtom(display, "_NET_WM_STRUT", False);
 321   net_wm_icon_geometry = XInternAtom(display, "_NET_WM_ICON_GEOMETRY", False);
 322   net_wm_icon = XInternAtom(display, "_NET_WM_ICON", False);
 323   net_wm_pid = XInternAtom(display, "_NET_WM_PID", False);
 324   net_wm_handled_icons = XInternAtom(display, "_NET_WM_HANDLED_ICONS", False);
 325
 326   net_wm_ping = XInternAtom(display, "_NET_WM_PING", False);
 327
 328 #endif // NEWWMSPEC
 329
 330   cursor.session = XCreateFontCursor(display, XC_left_ptr);
 331   cursor.move = XCreateFontCursor(display, XC_fleur);
 332   cursor.ll_angle = XCreateFontCursor(display, XC_ll_angle);
 333   cursor.lr_angle = XCreateFontCursor(display, XC_lr_angle);
 334   cursor.ul_angle = XCreateFontCursor(display, XC_ul_angle);
 335   cursor.ur_angle = XCreateFontCursor(display, XC_ur_angle);
 336
 337   XSetErrorHandler((XErrorHandler) handleXErrors);
 338
 339   timerList = new LinkedList<BTimer>;
 340
 341   screenInfoList = new LinkedList<ScreenInfo>;
 342   for (int i = 0; i < number_of_screens; i++) {
 343     ScreenInfo *screeninfo = new ScreenInfo(*this, i);
 344     screenInfoList->insert(screeninfo);
 345   }
 346
 347 #ifndef   NOCLOBBER
 348   NumLockMask = ScrollLockMask = 0;
 349
 350   const XModifierKeymap* const modmap = XGetModifierMapping(display);
 351   if (modmap && modmap->max_keypermod > 0) {
 352     const int mask_table[] = {
 353       ShiftMask, LockMask, ControlMask, Mod1Mask,
 354       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 355     };
 356     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 357       modmap->max_keypermod;
 358     // get the values of the keyboard lock modifiers
 359     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 360     // since it doesn't need to be.
 361     const KeyCode num_lock_code = XKeysymToKeycode(display, XK_Num_Lock);
 362     const KeyCode scroll_lock_code = XKeysymToKeycode(display, XK_Scroll_Lock);
 363
 364     for (size_t cnt = 0; cnt < size; ++cnt) {
 365       if (! modmap->modifiermap[cnt]) continue;
 366
 367       if (num_lock_code == modmap->modifiermap[cnt])
 368         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 369       if (scroll_lock_code == modmap->modifiermap[cnt])
 370         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 371     }
 372   }
 373
 374   MaskList[0] = 0;
 375   MaskList[1] = LockMask;
 376   MaskList[2] = NumLockMask;
 377   MaskList[3] = ScrollLockMask;
 378   MaskList[4] = LockMask | NumLockMask;
 379   MaskList[5] = NumLockMask  | ScrollLockMask;
 380   MaskList[6] = LockMask | ScrollLockMask;
 381   MaskList[7] = LockMask | NumLockMask | ScrollLockMask;
 382   MaskListLength = sizeof(MaskList) / sizeof(MaskList[0]);
 383
 384   if (modmap) XFreeModifiermap(const_cast<XModifierKeymap*>(modmap));
 385 #else
 386   NumLockMask = Mod2Mask;
 387   ScrollLockMask = Mod5Mask;
 388 #endif // NOCLOBBER
 389 }
 390
 391
 392 BaseDisplay::~BaseDisplay(void) {
 393   while (screenInfoList->count()) {
 394     ScreenInfo *si = screenInfoList->first();
 395
 396     screenInfoList->remove(si);
 397     delete si;
 398   }
 399
 400   delete screenInfoList;
 401
 402   // we don't create the BTimers, we don't delete them
 403   while (timerList->count())
 404     timerList->remove(0);
 405
 406   delete timerList;
 407
 408   XCloseDisplay(display);
 409 }
 410
 411
 412 void BaseDisplay::eventLoop(void) {
 413   run();
 414
 415   int xfd = ConnectionNumber(display);
 416
 417   while ((! _shutdown) && (! internal_error)) {
 418     if (XPending(display)) {
 419       XEvent e;
 420       XNextEvent(display, &e);
 421
 422       if (last_bad_window != None && e.xany.window == last_bad_window) {
 423 #ifdef    DEBUG
 424       fprintf(stderr, i18n->getMessage(BaseDisplaySet,
 425                                        BaseDisplayBadWindowRemove,
 426                          "BaseDisplay::eventLoop(): removing bad window "
 427                          "from event queue\n"));
 428 #endif // DEBUG
 429       } else {
 430         last_bad_window = None;
 431         process_event(&e);
 432       }
 433     } else {
 434       fd_set rfds;
 435       timeval now, tm, *timeout = (timeval *) 0;
 436
 437       FD_ZERO(&rfds);
 438       FD_SET(xfd, &rfds);
 439
 440       if (timerList->count()) {
 441         gettimeofday(&now, 0);
 442
 443         tm.tv_sec = tm.tv_usec = 0l;
 444
 445         BTimer *timer = timerList->first();
 446
 447         tm.tv_sec = timer->getStartTime().tv_sec +
 448           timer->getTimeout().tv_sec - now.tv_sec;
 449         tm.tv_usec = timer->getStartTime().tv_usec +
 450           timer->getTimeout().tv_usec - now.tv_usec;
 451
 452         while (tm.tv_usec >= 1000000) {
 453           tm.tv_sec++;
 454           tm.tv_usec -= 1000000;
 455         }
 456
 457         while (tm.tv_usec < 0) {
 458           if (tm.tv_sec > 0) {
 459             tm.tv_sec--;
 460             tm.tv_usec += 1000000;
 461           } else {
 462             tm.tv_usec = 0;
 463             break;
 464           }
 465         }
 466
 467         timeout = &tm;
 468       }
 469
 470       select(xfd + 1, &rfds, 0, 0, timeout);
 471
 472       // check for timer timeout
 473       gettimeofday(&now, 0);
 474
 475       LinkedListIterator<BTimer> it(timerList);
 476       for(BTimer *timer = it.current(); timer; it++, timer = it.current()) {
 477         tm.tv_sec = timer->getStartTime().tv_sec +
 478           timer->getTimeout().tv_sec;
 479         tm.tv_usec = timer->getStartTime().tv_usec +
 480           timer->getTimeout().tv_usec;
 481
 482         if ((now.tv_sec < tm.tv_sec) ||
 483             (now.tv_sec == tm.tv_sec && now.tv_usec < tm.tv_usec))
 484           break;
 485
 486         timer->fireTimeout();
 487
 488         // restart the current timer so that the start time is updated
 489         if (! timer->doOnce()) timer->start();
 490         else timer->stop();
 491       }
 492     }
 493   }
 494 }
 495
 496
 497 const Bool BaseDisplay::validateWindow(Window window) {
 498   XEvent event;
 499   if (XCheckTypedWindowEvent(display, window, DestroyNotify, &event)) {
 500     XPutBackEvent(display, &event);
 501
 502     return False;
 503   }
 504
 505   return True;
 506 }
 507
 508
 509 void BaseDisplay::grab(void) {
 510   if (! server_grabs++)
 511     XGrabServer(display);
 512 }
 513
 514
 515 void BaseDisplay::ungrab(void) {
 516   if (! --server_grabs)
 517     XUngrabServer(display);
 518
 519   if (server_grabs < 0) server_grabs = 0;
 520 }
 521
 522
 523 void BaseDisplay::addTimer(BTimer *timer) {
 524   if (! timer) return;
 525
 526   LinkedListIterator<BTimer> it(timerList);
 527   int index = 0;
 528   for (BTimer *tmp = it.current(); tmp; it++, index++, tmp = it.current())
 529     if ((tmp->getTimeout().tv_sec > timer->getTimeout().tv_sec) ||
 530         ((tmp->getTimeout().tv_sec == timer->getTimeout().tv_sec) &&
 531          (tmp->getTimeout().tv_usec >= timer->getTimeout().tv_usec)))
 532       break;
 533
 534   timerList->insert(timer, index);
 535 }
 536
 537
 538 void BaseDisplay::removeTimer(BTimer *timer) {
 539   timerList->remove(timer);
 540 }
 541
 542
 543 /*
 544  * Grabs a button, but also grabs the button in every possible combination with
 545  * the keyboard lock keys, so that they do not cancel out the event.
 546  */
 547 void BaseDisplay::grabButton(unsigned int button, unsigned int modifiers,
 548                              Window grab_window, Bool owner_events,
 549                              unsigned int event_mask, int pointer_mode,
 550                              int keybaord_mode, Window confine_to,
 551                              Cursor cursor) const
 552 {
 553 #ifndef   NOCLOBBER
 554   for (size_t cnt = 0; cnt < MaskListLength; ++cnt)
 555     XGrabButton(display, button, modifiers | MaskList[cnt], grab_window,
 556                 owner_events, event_mask, pointer_mode, keybaord_mode,
 557                 confine_to, cursor);
 558 #else  // NOCLOBBER
 559     XGrabButton(display, button, modifiers, grab_window,
 560                 owner_events, event_mask, pointer_mode, keybaord_mode,
 561                 confine_to, cursor);
 562 #endif // NOCLOBBER
 563 }
 564
 565 /*
 566  * Releases the grab on a button, and ungrabs all possible combinations of the
 567  * keyboard lock keys.
 568  */
 569 void BaseDisplay::ungrabButton(unsigned int button, unsigned int modifiers,
 570                                Window grab_window) const {
 571 #ifndef   NOCLOBBER
 572   for (size_t cnt = 0; cnt < MaskListLength; ++cnt)
 573     XUngrabButton(display, button, modifiers | MaskList[cnt], grab_window);
 574 #else  // NOCLOBBER
 575     XUngrabButton(display, button, modifiers, grab_window);
 576 #endif // NOCLOBBER
 577 }
 578
 579
 580 ScreenInfo::ScreenInfo(BaseDisplay &d, int num) : basedisplay(d),
 581   screen_number(num)
 582 {
 583
 584   root_window = RootWindow(basedisplay.getXDisplay(), screen_number);
 585   depth = DefaultDepth(basedisplay.getXDisplay(), screen_number);
 586
 587   m_size = Size(WidthOfScreen(ScreenOfDisplay(basedisplay.getXDisplay(),
 588                                               screen_number)),
 589                 HeightOfScreen(ScreenOfDisplay(basedisplay.getXDisplay(),
 590                                                screen_number)));
 591
 592   // search for a TrueColor Visual... if we can't find one... we will use the
 593   // default visual for the screen
 594   XVisualInfo vinfo_template, *vinfo_return;
 595   int vinfo_nitems;
 596
 597   vinfo_template.screen = screen_number;
 598   vinfo_template.c_class = TrueColor;
 599
 600   visual = (Visual *) 0;
 601
 602   if ((vinfo_return = XGetVisualInfo(basedisplay.getXDisplay(),
 603                                      VisualScreenMask | VisualClassMask,
 604                                      &vinfo_template, &vinfo_nitems)) &&
 605       vinfo_nitems > 0) {
 606     for (int i = 0; i < vinfo_nitems; i++) {
 607       if (depth < (vinfo_return + i)->depth) {
 608         depth = (vinfo_return + i)->depth;
 609         visual = (vinfo_return + i)->visual;
 610       }
 611     }
 612
 613     XFree(vinfo_return);
 614   }
 615
 616   if (visual) {
 617     colormap = XCreateColormap(basedisplay.getXDisplay(), root_window,
 618                                visual, AllocNone);
 619   } else {
 620     visual = DefaultVisual(basedisplay.getXDisplay(), screen_number);
 621     colormap = DefaultColormap(basedisplay.getXDisplay(), screen_number);
 622   }
 623 }