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 #include <algorithm>
  95
  96 // X error handler to handle any and all X errors while the application is
  97 // running
  98 static Bool internal_error = False;
  99 static Window last_bad_window = None;
 100
 101 BaseDisplay *base_display;
 102
 103 static int handleXErrors(Display *d, XErrorEvent *e) {
 104 #ifdef    DEBUG
 105   char errtxt[128];
 106
 107   XGetErrorText(d, e->error_code, errtxt, 128);
 108   fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayXError,
 109                      "%s:  X error: %s(%d) opcodes %d/%d\n  resource 0x%lx\n"),
 110           base_display->getApplicationName(), errtxt, e->error_code,
 111           e->request_code, e->minor_code, e->resourceid);
 112 #endif // DEBUG
 113
 114   if (e->error_code == BadWindow) last_bad_window = e->resourceid;
 115   if (internal_error) abort();
 116
 117   return(False);
 118 }
 119
 120
 121 // signal handler to allow for proper and gentle shutdown
 122
 123 #ifndef   HAVE_SIGACTION
 124 static RETSIGTYPE signalhandler(int sig) {
 125 #else //  HAVE_SIGACTION
 126 static void signalhandler(int sig) {
 127 #endif // HAVE_SIGACTION
 128
 129   static int re_enter = 0;
 130
 131   switch (sig) {
 132   case SIGCHLD:
 133     int status;
 134     waitpid(-1, &status, WNOHANG | WUNTRACED);
 135
 136 #ifndef   HAVE_SIGACTION
 137     // assume broken, braindead sysv signal semantics
 138     signal(SIGCHLD, (RETSIGTYPE (*)(int)) signalhandler);
 139 #endif // HAVE_SIGACTION
 140
 141     break;
 142
 143   default:
 144     if (base_display->handleSignal(sig)) {
 145
 146 #ifndef   HAVE_SIGACTION
 147       // assume broken, braindead sysv signal semantics
 148       signal(sig, (RETSIGTYPE (*)(int)) signalhandler);
 149 #endif // HAVE_SIGACTION
 150
 151       return;
 152     }
 153
 154     fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplaySignalCaught,
 155                                      "%s:  signal %d caught\n"),
 156             base_display->getApplicationName(), sig);
 157
 158     if (! base_display->isStartup() && ! re_enter) {
 159       internal_error = True;
 160
 161       re_enter = 1;
 162       fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayShuttingDown,
 163                                        "shutting down\n"));
 164       base_display->shutdown();
 165     }
 166
 167     if (sig != SIGTERM && sig != SIGINT) {
 168       fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayAborting,
 169                                        "aborting... dumping core\n"));
 170       abort();
 171     }
 172
 173     exit(0);
 174
 175     break;
 176   }
 177 }
 178
 179
 180 // convenience functions
 181 #ifndef    __EMX__
 182 void bexec(const char *command, char* displaystring) {
 183   if (! fork()) {
 184     setsid();
 185     putenv(displaystring);
 186     execl("/bin/sh", "/bin/sh", "-c", command, NULL);
 187     exit(0);
 188   }
 189 }
 190 #endif // !__EMX__
 191
 192 char *bstrdup(const char *s) {
 193   const int l = strlen(s) + 1;
 194   char *n = new char[l];
 195   strncpy(n, s, l);
 196   return n;
 197 }
 198
 199 BaseDisplay::BaseDisplay(const char *app_name, char *dpy_name) {
 200   application_name = bstrdup(app_name);
 201
 202   _startup = True;
 203   _shutdown = False;
 204   server_grabs = 0;
 205   last_bad_window = None;
 206
 207   ::base_display = this;
 208
 209 #ifdef    HAVE_SIGACTION
 210   struct sigaction action;
 211
 212   action.sa_handler = signalhandler;
 213   action.sa_mask = sigset_t();
 214   action.sa_flags = SA_NOCLDSTOP | SA_NODEFER;
 215
 216   sigaction(SIGPIPE, &action, NULL);
 217   sigaction(SIGSEGV, &action, NULL);
 218   sigaction(SIGFPE, &action, NULL);
 219   sigaction(SIGTERM, &action, NULL);
 220   sigaction(SIGINT, &action, NULL);
 221   sigaction(SIGCHLD, &action, NULL);
 222   sigaction(SIGHUP, &action, NULL);
 223   sigaction(SIGUSR1, &action, NULL);
 224   sigaction(SIGUSR2, &action, NULL);
 225 #else // !HAVE_SIGACTION
 226   signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler);
 227   signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler);
 228   signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler);
 229   signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler);
 230   signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler);
 231   signal(SIGUSR1, (RETSIGTYPE (*)(int)) signalhandler);
 232   signal(SIGUSR2, (RETSIGTYPE (*)(int)) signalhandler);
 233   signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler);
 234   signal(SIGCHLD, (RETSIGTYPE (*)(int)) signalhandler);
 235 #endif // HAVE_SIGACTION
 236
 237   if (! (display = XOpenDisplay(dpy_name))) {
 238     fprintf(stderr, i18n->getMessage(BaseDisplaySet, BaseDisplayXConnectFail,
 239                "BaseDisplay::BaseDisplay: connection to X server failed.\n"));
 240     ::exit(2);
 241   } else if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
 242     fprintf(stderr,
 243             i18n->getMessage(BaseDisplaySet, BaseDisplayCloseOnExecFail,
 244                "BaseDisplay::BaseDisplay: couldn't mark display connection "
 245                "as close-on-exec\n"));
 246     ::exit(2);
 247   }
 248
 249   number_of_screens = ScreenCount(display);
 250   display_name = XDisplayName(dpy_name);
 251
 252 #ifdef    SHAPE
 253   shape.extensions = XShapeQueryExtension(display, &shape.event_basep,
 254                                           &shape.error_basep);
 255 #else // !SHAPE
 256   shape.extensions = False;
 257 #endif // SHAPE
 258
 259   xa_wm_colormap_windows =
 260     XInternAtom(display, "WM_COLORMAP_WINDOWS", False);
 261   xa_wm_protocols = XInternAtom(display, "WM_PROTOCOLS", False);
 262   xa_wm_state = XInternAtom(display, "WM_STATE", False);
 263   xa_wm_change_state = XInternAtom(display, "WM_CHANGE_STATE", False);
 264   xa_wm_delete_window = XInternAtom(display, "WM_DELETE_WINDOW", False);
 265   xa_wm_take_focus = XInternAtom(display, "WM_TAKE_FOCUS", False);
 266   motif_wm_hints = XInternAtom(display, "_MOTIF_WM_HINTS", False);
 267
 268   openbox_hints = XInternAtom(display, "_BLACKBOX_HINTS", False);
 269   openbox_attributes = XInternAtom(display, "_BLACKBOX_ATTRIBUTES", False);
 270   openbox_change_attributes =
 271     XInternAtom(display, "_BLACKBOX_CHANGE_ATTRIBUTES", False);
 272
 273   openbox_structure_messages =
 274     XInternAtom(display, "_BLACKBOX_STRUCTURE_MESSAGES", False);
 275   openbox_notify_startup =
 276     XInternAtom(display, "_BLACKBOX_NOTIFY_STARTUP", False);
 277   openbox_notify_window_add =
 278     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_ADD", False);
 279   openbox_notify_window_del =
 280     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_DEL", False);
 281   openbox_notify_current_workspace =
 282     XInternAtom(display, "_BLACKBOX_NOTIFY_CURRENT_WORKSPACE", False);
 283   openbox_notify_workspace_count =
 284     XInternAtom(display, "_BLACKBOX_NOTIFY_WORKSPACE_COUNT", False);
 285   openbox_notify_window_focus =
 286     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_FOCUS", False);
 287   openbox_notify_window_raise =
 288     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_RAISE", False);
 289   openbox_notify_window_lower =
 290     XInternAtom(display, "_BLACKBOX_NOTIFY_WINDOW_LOWER", False);
 291
 292   openbox_change_workspace =
 293     XInternAtom(display, "_BLACKBOX_CHANGE_WORKSPACE", False);
 294   openbox_change_window_focus =
 295     XInternAtom(display, "_BLACKBOX_CHANGE_WINDOW_FOCUS", False);
 296   openbox_cycle_window_focus =
 297     XInternAtom(display, "_BLACKBOX_CYCLE_WINDOW_FOCUS", False);
 298
 299 #ifdef    NEWWMSPEC
 300
 301   net_supported = XInternAtom(display, "_NET_SUPPORTED", False);
 302   net_client_list = XInternAtom(display, "_NET_CLIENT_LIST", False);
 303   net_client_list_stacking = XInternAtom(display, "_NET_CLIENT_LIST_STACKING", False);
 304   net_number_of_desktops = XInternAtom(display, "_NET_NUMBER_OF_DESKTOPS", False);
 305   net_desktop_geometry = XInternAtom(display, "_NET_DESKTOP_GEOMETRY", False);
 306   net_desktop_viewport = XInternAtom(display, "_NET_DESKTOP_VIEWPORT", False);
 307   net_current_desktop = XInternAtom(display, "_NET_CURRENT_DESKTOP", False);
 308   net_desktop_names = XInternAtom(display, "_NET_DESKTOP_NAMES", False);
 309   net_active_window = XInternAtom(display, "_NET_ACTIVE_WINDOW", False);
 310   net_workarea = XInternAtom(display, "_NET_WORKAREA", False);
 311   net_supporting_wm_check = XInternAtom(display, "_NET_SUPPORTING_WM_CHECK", False);
 312   net_virtual_roots = XInternAtom(display, "_NET_VIRTUAL_ROOTS", False);
 313
 314   net_close_window = XInternAtom(display, "_NET_CLOSE_WINDOW", False);
 315   net_wm_moveresize = XInternAtom(display, "_NET_WM_MOVERESIZE", False);
 316
 317   net_properties = XInternAtom(display, "_NET_PROPERTIES", False);
 318   net_wm_name = XInternAtom(display, "_NET_WM_NAME", False);
 319   net_wm_desktop = XInternAtom(display, "_NET_WM_DESKTOP", False);
 320   net_wm_window_type = XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
 321   net_wm_state = XInternAtom(display, "_NET_WM_STATE", False);
 322   net_wm_strut = XInternAtom(display, "_NET_WM_STRUT", False);
 323   net_wm_icon_geometry = XInternAtom(display, "_NET_WM_ICON_GEOMETRY", False);
 324   net_wm_icon = XInternAtom(display, "_NET_WM_ICON", False);
 325   net_wm_pid = XInternAtom(display, "_NET_WM_PID", False);
 326   net_wm_handled_icons = XInternAtom(display, "_NET_WM_HANDLED_ICONS", False);
 327
 328   net_wm_ping = XInternAtom(display, "_NET_WM_PING", False);
 329
 330 #endif // NEWWMSPEC
 331
 332   cursor.session = XCreateFontCursor(display, XC_left_ptr);
 333   cursor.move = XCreateFontCursor(display, XC_fleur);
 334   cursor.ll_angle = XCreateFontCursor(display, XC_ll_angle);
 335   cursor.lr_angle = XCreateFontCursor(display, XC_lr_angle);
 336   cursor.ul_angle = XCreateFontCursor(display, XC_ul_angle);
 337   cursor.ur_angle = XCreateFontCursor(display, XC_ur_angle);
 338
 339   XSetErrorHandler((XErrorHandler) handleXErrors);
 340
 341   screenInfoList.reserve(ScreenCount(display));
 342   for (int i = 0; i < number_of_screens; i++)
 343     screenInfoList.push_back(new ScreenInfo(*this, i));
 344
 345 #ifndef   NOCLOBBER
 346   NumLockMask = ScrollLockMask = 0;
 347
 348   const XModifierKeymap* const modmap = XGetModifierMapping(display);
 349   if (modmap && modmap->max_keypermod > 0) {
 350     const int mask_table[] = {
 351       ShiftMask, LockMask, ControlMask, Mod1Mask,
 352       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 353     };
 354     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 355       modmap->max_keypermod;
 356     // get the values of the keyboard lock modifiers
 357     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 358     // since it doesn't need to be.
 359     const KeyCode num_lock_code = XKeysymToKeycode(display, XK_Num_Lock);
 360     const KeyCode scroll_lock_code = XKeysymToKeycode(display, XK_Scroll_Lock);
 361
 362     for (size_t cnt = 0; cnt < size; ++cnt) {
 363       if (! modmap->modifiermap[cnt]) continue;
 364
 365       if (num_lock_code == modmap->modifiermap[cnt])
 366         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 367       if (scroll_lock_code == modmap->modifiermap[cnt])
 368         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 369     }
 370   }
 371
 372   MaskList[0] = 0;
 373   MaskList[1] = LockMask;
 374   MaskList[2] = NumLockMask;
 375   MaskList[3] = ScrollLockMask;
 376   MaskList[4] = LockMask | NumLockMask;
 377   MaskList[5] = NumLockMask  | ScrollLockMask;
 378   MaskList[6] = LockMask | ScrollLockMask;
 379   MaskList[7] = LockMask | NumLockMask | ScrollLockMask;
 380   MaskListLength = sizeof(MaskList) / sizeof(MaskList[0]);
 381
 382   if (modmap) XFreeModifiermap(const_cast<XModifierKeymap*>(modmap));
 383 #else
 384   NumLockMask = Mod2Mask;
 385   ScrollLockMask = Mod5Mask;
 386 #endif // NOCLOBBER
 387 }
 388
 389
 390 BaseDisplay::~BaseDisplay(void) {
 391   std::for_each(screenInfoList.begin(), screenInfoList.end(),
 392                 PointerAssassin());
 393   // we don't create the BTimers, we don't delete them
 394
 395   if (application_name != NULL)
 396     delete [] application_name;
 397
 398   XCloseDisplay(display);
 399 }
 400
 401
 402 void BaseDisplay::eventLoop(void) {
 403   run();
 404
 405   int xfd = ConnectionNumber(display);
 406
 407   while ((! _shutdown) && (! internal_error)) {
 408     if (XPending(display)) {
 409       XEvent e;
 410       XNextEvent(display, &e);
 411
 412       if (last_bad_window != None && e.xany.window == last_bad_window) {
 413 #ifdef    DEBUG
 414       fprintf(stderr, i18n->getMessage(BaseDisplaySet,
 415                                        BaseDisplayBadWindowRemove,
 416                          "BaseDisplay::eventLoop(): removing bad window "
 417                          "from event queue\n"));
 418 #endif // DEBUG
 419       } else {
 420         last_bad_window = None;
 421         process_event(&e);
 422       }
 423     } else {
 424       fd_set rfds;
 425       timeval now, tm, *timeout = (timeval *) 0;
 426
 427       FD_ZERO(&rfds);
 428       FD_SET(xfd, &rfds);
 429
 430       if (!timerList.empty()) {
 431         gettimeofday(&now, 0);
 432
 433         tm.tv_sec = tm.tv_usec = 0l;
 434
 435         BTimer *timer = timerList.front();
 436         ASSERT(timer != NULL);
 437
 438         tm.tv_sec = timer->getStartTime().tv_sec +
 439           timer->getTimeout().tv_sec - now.tv_sec;
 440         tm.tv_usec = timer->getStartTime().tv_usec +
 441           timer->getTimeout().tv_usec - now.tv_usec;
 442
 443         while (tm.tv_usec >= 1000000) {
 444           tm.tv_sec++;
 445           tm.tv_usec -= 1000000;
 446         }
 447
 448         while (tm.tv_usec < 0) {
 449           if (tm.tv_sec > 0) {
 450             tm.tv_sec--;
 451             tm.tv_usec += 1000000;
 452           } else {
 453             tm.tv_usec = 0;
 454             break;
 455           }
 456         }
 457
 458         timeout = &tm;
 459       }
 460
 461       select(xfd + 1, &rfds, 0, 0, timeout);
 462
 463       // check for timer timeout
 464       gettimeofday(&now, 0);
 465
 466       TimerList::iterator it;
 467       for (it = timerList.begin(); it != timerList.end(); ) {
 468         BTimer *timer = *it;
 469         ++it;   // the timer may be removed from the list, so move ahead now
 470         ASSERT(timer != NULL);
 471         tm.tv_sec = timer->getStartTime().tv_sec +
 472           timer->getTimeout().tv_sec;
 473         tm.tv_usec = timer->getStartTime().tv_usec +
 474           timer->getTimeout().tv_usec;
 475
 476         if ((now.tv_sec < tm.tv_sec) ||
 477             (now.tv_sec == tm.tv_sec && now.tv_usec < tm.tv_usec))
 478           break;
 479
 480         timer->fireTimeout();
 481
 482         // restart the current timer so that the start time is updated
 483         if (! timer->doOnce())
 484           timer->start();
 485         else {
 486           timer->stop();
 487 //          delete timer; // USE THIS?
 488         }
 489       }
 490     }
 491   }
 492 }
 493
 494
 495 const Bool BaseDisplay::validateWindow(Window window) {
 496   XEvent event;
 497   if (XCheckTypedWindowEvent(display, window, DestroyNotify, &event)) {
 498     XPutBackEvent(display, &event);
 499
 500     return False;
 501   }
 502
 503   return True;
 504 }
 505
 506
 507 void BaseDisplay::grab(void) {
 508   if (! server_grabs++)
 509     XGrabServer(display);
 510 }
 511
 512
 513 void BaseDisplay::ungrab(void) {
 514   if (! --server_grabs)
 515     XUngrabServer(display);
 516
 517   if (server_grabs < 0) server_grabs = 0;
 518 }
 519
 520
 521 void BaseDisplay::addTimer(BTimer *timer) {
 522   ASSERT(timer != (BTimer *) 0);
 523   printf("ADDING TIMER\n");
 524
 525   TimerList::iterator it;
 526   for (it = timerList.begin(); it != timerList.end(); ++it) {
 527     BTimer *tmp = *it;
 528     if ((tmp->getTimeout().tv_sec > timer->getTimeout().tv_sec) ||
 529         ((tmp->getTimeout().tv_sec == timer->getTimeout().tv_sec) &&
 530          (tmp->getTimeout().tv_usec >= timer->getTimeout().tv_usec)))
 531       break;
 532   }
 533
 534   timerList.insert(it, timer);
 535 }
 536
 537
 538 void BaseDisplay::removeTimer(BTimer *timer) {
 539   printf("REMOVING TIMER\n");
 540   timerList.remove(timer);
 541 }
 542
 543
 544 /*
 545  * Grabs a button, but also grabs the button in every possible combination with
 546  * the keyboard lock keys, so that they do not cancel out the event.
 547  */
 548 void BaseDisplay::grabButton(unsigned int button, unsigned int modifiers,
 549                              Window grab_window, Bool owner_events,
 550                              unsigned int event_mask, int pointer_mode,
 551                              int keybaord_mode, Window confine_to,
 552                              Cursor cursor) const
 553 {
 554 #ifndef   NOCLOBBER
 555   for (size_t cnt = 0; cnt < MaskListLength; ++cnt)
 556     XGrabButton(display, button, modifiers | MaskList[cnt], grab_window,
 557                 owner_events, event_mask, pointer_mode, keybaord_mode,
 558                 confine_to, cursor);
 559 #else  // NOCLOBBER
 560     XGrabButton(display, button, modifiers, grab_window,
 561                 owner_events, event_mask, pointer_mode, keybaord_mode,
 562                 confine_to, cursor);
 563 #endif // NOCLOBBER
 564 }
 565
 566 /*
 567  * Releases the grab on a button, and ungrabs all possible combinations of the
 568  * keyboard lock keys.
 569  */
 570 void BaseDisplay::ungrabButton(unsigned int button, unsigned int modifiers,
 571                                Window grab_window) const {
 572 #ifndef   NOCLOBBER
 573   for (size_t cnt = 0; cnt < MaskListLength; ++cnt)
 574     XUngrabButton(display, button, modifiers | MaskList[cnt], grab_window);
 575 #else  // NOCLOBBER
 576     XUngrabButton(display, button, modifiers, grab_window);
 577 #endif // NOCLOBBER
 578 }
 579
 580
 581 ScreenInfo::ScreenInfo(BaseDisplay &d, int num) : basedisplay(d),
 582   screen_number(num)
 583 {
 584
 585   root_window = RootWindow(basedisplay.getXDisplay(), screen_number);
 586   depth = DefaultDepth(basedisplay.getXDisplay(), screen_number);
 587
 588   m_size = Size(WidthOfScreen(ScreenOfDisplay(basedisplay.getXDisplay(),
 589                                               screen_number)),
 590                 HeightOfScreen(ScreenOfDisplay(basedisplay.getXDisplay(),
 591                                                screen_number)));
 592
 593   // search for a TrueColor Visual... if we can't find one... we will use the
 594   // default visual for the screen
 595   XVisualInfo vinfo_template, *vinfo_return;
 596   int vinfo_nitems;
 597
 598   vinfo_template.screen = screen_number;
 599   vinfo_template.c_class = TrueColor;
 600
 601   visual = (Visual *) 0;
 602
 603   if ((vinfo_return = XGetVisualInfo(basedisplay.getXDisplay(),
 604                                      VisualScreenMask | VisualClassMask,
 605                                      &vinfo_template, &vinfo_nitems)) &&
 606       vinfo_nitems > 0) {
 607     for (int i = 0; i < vinfo_nitems; i++) {
 608       if (depth < (vinfo_return + i)->depth) {
 609         depth = (vinfo_return + i)->depth;
 610         visual = (vinfo_return + i)->visual;
 611       }
 612     }
 613
 614     XFree(vinfo_return);
 615   }
 616
 617   if (visual) {
 618     colormap = XCreateColormap(basedisplay.getXDisplay(), root_window,
 619                                visual, AllocNone);
 620   } else {
 621     visual = DefaultVisual(basedisplay.getXDisplay(), screen_number);
 622     colormap = DefaultColormap(basedisplay.getXDisplay(), screen_number);
 623   }
 624 }