src/basedisplay.cc (raw)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 |
// -*- mode: C++; indent-tabs-mode: nil; -*- #ifdef HAVE_CONFIG_H # include "../config.h" #endif // HAVE_CONFIG_H extern "C" { #include <X11/Xlib.h> #include <X11/Xatom.h> #include <X11/Xutil.h> #include <X11/keysym.h> #ifdef SHAPE # include <X11/extensions/shape.h> #endif // SHAPE #ifdef XINERAMA # include <X11/extensions/Xinerama.h> #endif // XINERAMA #ifdef HAVE_FCNTL_H # include <fcntl.h> #endif // HAVE_FCNTL_H #ifdef HAVE_STDIO_H # include <stdio.h> #endif // HAVE_STDIO_H #ifdef HAVE_STDLIB_H # include <stdlib.h> #endif // HAVE_STDLIB_H #ifdef HAVE_STRING_H # include <string.h> #endif // HAVE_STRING_H #ifdef HAVE_UNISTD_H # include <sys/types.h> # include <unistd.h> #endif // HAVE_UNISTD_H #ifdef HAVE_SYS_SELECT_H # include <sys/select.h> #endif // HAVE_SYS_SELECT_H #ifdef HAVE_SIGNAL_H # include <signal.h> #endif // HAVE_SIGNAL_H #ifdef HAVE_SYS_WAIT_H # include <sys/types.h> # include <sys/wait.h> #endif // HAVE_SYS_WAIT_H } #include <string> using std::string; #include "basedisplay.hh" #include "gccache.hh" #include "timer.hh" #include "otk/util.hh" // X error handler to handle any and all X errors while the application is // running static bool internal_error = False; BaseDisplay *base_display; static int handleXErrors(Display *d, XErrorEvent *e) { #ifdef DEBUG char errtxt[128]; XGetErrorText(d, e->error_code, errtxt, 128); // XXX: use this!! fprintf(stderr, "%s: X error: %s(%d) opcodes %d/%d\n resource 0x%lx\n", base_display->getApplicationName(), errtxt, e->error_code, e->request_code, e->minor_code, e->resourceid); #else // shutup gcc (void) d; (void) e; #endif // DEBUG if (internal_error) abort(); return(False); } // signal handler to allow for proper and gentle shutdown static void signalhandler(int sig) { static int re_enter = 0; switch (sig) { case SIGCHLD: int status; waitpid(-1, &status, WNOHANG | WUNTRACED); break; default: if (base_display->handleSignal(sig)) return; fprintf(stderr, "%s: signal %d caught\n", base_display->getApplicationName(), sig); if (! base_display->isStartup() && ! re_enter) { internal_error = True; re_enter = 1; fprintf(stderr, "shutting down\n"); base_display->shutdown(); } if (sig != SIGTERM && sig != SIGINT) { fprintf(stderr, "aborting... dumping core\n"); abort(); } exit(0); break; } } BaseDisplay::BaseDisplay(const char *app_name, const char *dpy_name) { application_name = app_name; run_state = STARTUP; ::base_display = this; struct sigaction action; action.sa_handler = signalhandler; action.sa_mask = sigset_t(); action.sa_flags = SA_NOCLDSTOP | SA_NODEFER; sigaction(SIGPIPE, &action, NULL); sigaction(SIGSEGV, &action, NULL); sigaction(SIGFPE, &action, NULL); sigaction(SIGTERM, &action, NULL); sigaction(SIGINT, &action, NULL); sigaction(SIGCHLD, &action, NULL); sigaction(SIGHUP, &action, NULL); sigaction(SIGUSR1, &action, NULL); sigaction(SIGUSR2, &action, NULL); if (! (display = XOpenDisplay(dpy_name))) { fprintf(stderr, "BaseDisplay::BaseDisplay: connection to X server failed.\n"); ::exit(2); } else if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) { fprintf(stderr, "BaseDisplay::BaseDisplay: couldn't mark display connection " "as close-on-exec\n"); ::exit(2); } display_name = XDisplayName(dpy_name); #ifdef SHAPE shape.extensions = XShapeQueryExtension(display, &shape.event_basep, &shape.error_basep); #else // !SHAPE shape.extensions = False; #endif // SHAPE #ifdef XINERAMA if (XineramaQueryExtension(display, &xinerama.event_basep, &xinerama.error_basep) && XineramaQueryVersion(display, &xinerama.major, &xinerama.minor)) { #ifdef DEBUG fprintf(stderr, "BaseDisplay::BaseDisplay: Found Xinerama version %d.%d\n", xinerama.major, xinerama.minor); #endif // DEBUG xinerama.extensions = True; } else { xinerama.extensions = False; } #endif // XINERAMA XSetErrorHandler((XErrorHandler) handleXErrors); screenInfoList.reserve(ScreenCount(display)); for (int i = 0; i < ScreenCount(display); ++i) screenInfoList.push_back(ScreenInfo(this, i)); NumLockMask = ScrollLockMask = 0; const XModifierKeymap* const modmap = XGetModifierMapping(display); if (modmap && modmap->max_keypermod > 0) { const int mask_table[] = { ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask }; const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) * modmap->max_keypermod; // get the values of the keyboard lock modifiers // Note: Caps lock is not retrieved the same way as Scroll and Num lock // since it doesn't need to be. const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock); const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock); for (size_t cnt = 0; cnt < size; ++cnt) { if (! modmap->modifiermap[cnt]) continue; if (num_lock == modmap->modifiermap[cnt]) NumLockMask = mask_table[cnt / modmap->max_keypermod]; if (scroll_lock == modmap->modifiermap[cnt]) ScrollLockMask = mask_table[cnt / modmap->max_keypermod]; } } MaskList[0] = 0; MaskList[1] = LockMask; MaskList[2] = NumLockMask; MaskList[3] = LockMask | NumLockMask; MaskList[4] = ScrollLockMask; MaskList[5] = ScrollLockMask | LockMask; MaskList[6] = ScrollLockMask | NumLockMask; MaskList[7] = ScrollLockMask | LockMask | NumLockMask; MaskListLength = sizeof(MaskList) / sizeof(MaskList[0]); if (modmap) XFreeModifiermap(const_cast<XModifierKeymap*>(modmap)); gccache = (BGCCache *) 0; } BaseDisplay::~BaseDisplay(void) { delete gccache; XCloseDisplay(display); } void BaseDisplay::eventLoop(void) { run(); const int xfd = ConnectionNumber(display); while (run_state == RUNNING && ! internal_error) { if (XPending(display)) { XEvent e; XNextEvent(display, &e); process_event(&e); } else { fd_set rfds; timeval now, tm, *timeout = (timeval *) 0; FD_ZERO(&rfds); FD_SET(xfd, &rfds); if (! timerList.empty()) { const BTimer* const timer = timerList.top(); gettimeofday(&now, 0); tm = timer->timeRemaining(now); timeout = &tm; } select(xfd + 1, &rfds, 0, 0, timeout); // check for timer timeout gettimeofday(&now, 0); // there is a small chance for deadlock here: // *IF* the timer list keeps getting refreshed *AND* the time between // timer->start() and timer->shouldFire() is within the timer's period // then the timer will keep firing. This should be VERY near impossible. while (! timerList.empty()) { BTimer *timer = timerList.top(); if (! timer->shouldFire(now)) break; timerList.pop(); timer->fireTimeout(); timer->halt(); if (timer->isRecurring()) timer->start(); } } } } void BaseDisplay::addTimer(BTimer *timer) { if (! timer) return; timerList.push(timer); } void BaseDisplay::removeTimer(BTimer *timer) { timerList.release(timer); } /* * Grabs a button, but also grabs the button in every possible combination * with the keyboard lock keys, so that they do not cancel out the event. * if allow_scroll_lock is true then only the top half of the lock mask * table is used and scroll lock is ignored. This value defaults to false. */ void BaseDisplay::grabButton(unsigned int button, unsigned int modifiers, Window grab_window, bool owner_events, unsigned int event_mask, int pointer_mode, int keyboard_mode, Window confine_to, Cursor cursor, bool allow_scroll_lock) const { unsigned int length = (allow_scroll_lock) ? MaskListLength / 2: MaskListLength; for (size_t cnt = 0; cnt < length; ++cnt) XGrabButton(display, button, modifiers | MaskList[cnt], grab_window, owner_events, event_mask, pointer_mode, keyboard_mode, confine_to, cursor); } /* * Releases the grab on a button, and ungrabs all possible combinations of the * keyboard lock keys. */ void BaseDisplay::ungrabButton(unsigned int button, unsigned int modifiers, Window grab_window) const { for (size_t cnt = 0; cnt < MaskListLength; ++cnt) XUngrabButton(display, button, modifiers | MaskList[cnt], grab_window); } const ScreenInfo* BaseDisplay::getScreenInfo(unsigned int s) const { if (s < screenInfoList.size()) return &screenInfoList[s]; return (const ScreenInfo*) 0; } BGCCache* BaseDisplay::gcCache(void) const { if (! gccache) gccache = new BGCCache(this, screenInfoList.size()); return gccache; } |