1 // -*- mode: C++; indent-tabs-mode: nil; -*-
4 # include "../config.h"
5 #endif // HAVE_CONFIG_H
10 #include <X11/Xutil.h>
11 #include <X11/keysym.h>
14 # include <X11/extensions/shape.h>
18 # include <X11/extensions/Xinerama.h>
23 #endif // HAVE_FCNTL_H
27 #endif // HAVE_STDIO_H
31 #endif // HAVE_STDLIB_H
35 #endif // HAVE_STRING_H
38 # include <sys/types.h>
40 #endif // HAVE_UNISTD_H
42 #ifdef HAVE_SYS_SELECT_H
43 # include <sys/select.h>
44 #endif // HAVE_SYS_SELECT_H
48 #endif // HAVE_SIGNAL_H
50 #ifdef HAVE_SYS_WAIT_H
51 # include <sys/types.h>
52 # include <sys/wait.h>
53 #endif // HAVE_SYS_WAIT_H
59 #include "basedisplay.hh"
65 // X error handler to handle any and all X errors while the application is
67 static bool internal_error = False;
69 BaseDisplay *base_display;
71 static int handleXErrors(Display *d, XErrorEvent *e) {
75 XGetErrorText(d, e->error_code, errtxt, 128); // XXX: use this!!
76 fprintf(stderr, "%s: X error: %s(%d) opcodes %d/%d\n resource 0x%lx\n",
77 base_display->getApplicationName(), errtxt, e->error_code,
78 e->request_code, e->minor_code, e->resourceid);
85 if (internal_error) abort();
91 // signal handler to allow for proper and gentle shutdown
93 static void signalhandler(int sig) {
95 static int re_enter = 0;
100 waitpid(-1, &status, WNOHANG | WUNTRACED);
104 if (base_display->handleSignal(sig))
107 fprintf(stderr, "%s: signal %d caught\n",
108 base_display->getApplicationName(), sig);
110 if (! base_display->isStartup() && ! re_enter) {
111 internal_error = True;
114 fprintf(stderr, "shutting down\n");
115 base_display->shutdown();
118 if (sig != SIGTERM && sig != SIGINT) {
119 fprintf(stderr, "aborting... dumping core\n");
130 BaseDisplay::BaseDisplay(const char *app_name, const char *dpy_name) {
131 application_name = app_name;
135 ::base_display = this;
137 struct sigaction action;
139 action.sa_handler = signalhandler;
140 action.sa_mask = sigset_t();
141 action.sa_flags = SA_NOCLDSTOP | SA_NODEFER;
143 sigaction(SIGPIPE, &action, NULL);
144 sigaction(SIGSEGV, &action, NULL);
145 sigaction(SIGFPE, &action, NULL);
146 sigaction(SIGTERM, &action, NULL);
147 sigaction(SIGINT, &action, NULL);
148 sigaction(SIGCHLD, &action, NULL);
149 sigaction(SIGHUP, &action, NULL);
150 sigaction(SIGUSR1, &action, NULL);
151 sigaction(SIGUSR2, &action, NULL);
153 if (! (display = XOpenDisplay(dpy_name))) {
155 "BaseDisplay::BaseDisplay: connection to X server failed.\n");
157 } else if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
159 "BaseDisplay::BaseDisplay: couldn't mark display connection "
160 "as close-on-exec\n");
164 display_name = XDisplayName(dpy_name);
167 shape.extensions = XShapeQueryExtension(display, &shape.event_basep,
170 shape.extensions = False;
174 if (XineramaQueryExtension(display, &xinerama.event_basep,
175 &xinerama.error_basep) &&
176 XineramaQueryVersion(display, &xinerama.major, &xinerama.minor)) {
179 "BaseDisplay::BaseDisplay: Found Xinerama version %d.%d\n",
180 xinerama.major, xinerama.minor);
182 xinerama.extensions = True;
184 xinerama.extensions = False;
188 XSetErrorHandler((XErrorHandler) handleXErrors);
190 screenInfoList.reserve(ScreenCount(display));
191 for (int i = 0; i < ScreenCount(display); ++i)
192 screenInfoList.push_back(ScreenInfo(this, i));
194 NumLockMask = ScrollLockMask = 0;
196 const XModifierKeymap* const modmap = XGetModifierMapping(display);
197 if (modmap && modmap->max_keypermod > 0) {
198 const int mask_table[] = {
199 ShiftMask, LockMask, ControlMask, Mod1Mask,
200 Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
202 const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
203 modmap->max_keypermod;
204 // get the values of the keyboard lock modifiers
205 // Note: Caps lock is not retrieved the same way as Scroll and Num lock
206 // since it doesn't need to be.
207 const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock);
208 const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock);
210 for (size_t cnt = 0; cnt < size; ++cnt) {
211 if (! modmap->modifiermap[cnt]) continue;
213 if (num_lock == modmap->modifiermap[cnt])
214 NumLockMask = mask_table[cnt / modmap->max_keypermod];
215 if (scroll_lock == modmap->modifiermap[cnt])
216 ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
221 MaskList[1] = LockMask;
222 MaskList[2] = NumLockMask;
223 MaskList[3] = LockMask | NumLockMask;
224 MaskList[4] = ScrollLockMask;
225 MaskList[5] = ScrollLockMask | LockMask;
226 MaskList[6] = ScrollLockMask | NumLockMask;
227 MaskList[7] = ScrollLockMask | LockMask | NumLockMask;
228 MaskListLength = sizeof(MaskList) / sizeof(MaskList[0]);
230 if (modmap) XFreeModifiermap(const_cast<XModifierKeymap*>(modmap));
232 gccache = (BGCCache *) 0;
236 BaseDisplay::~BaseDisplay(void) {
239 XCloseDisplay(display);
243 void BaseDisplay::eventLoop(void) {
246 const int xfd = ConnectionNumber(display);
248 while (run_state == RUNNING && ! internal_error) {
249 if (XPending(display)) {
251 XNextEvent(display, &e);
255 timeval now, tm, *timeout = (timeval *) 0;
260 if (! timerList.empty()) {
261 const BTimer* const timer = timerList.top();
263 gettimeofday(&now, 0);
264 tm = timer->timeRemaining(now);
269 select(xfd + 1, &rfds, 0, 0, timeout);
271 // check for timer timeout
272 gettimeofday(&now, 0);
274 // there is a small chance for deadlock here:
275 // *IF* the timer list keeps getting refreshed *AND* the time between
276 // timer->start() and timer->shouldFire() is within the timer's period
277 // then the timer will keep firing. This should be VERY near impossible.
278 while (! timerList.empty()) {
279 BTimer *timer = timerList.top();
280 if (! timer->shouldFire(now))
285 timer->fireTimeout();
287 if (timer->isRecurring())
295 void BaseDisplay::addTimer(BTimer *timer) {
298 timerList.push(timer);
302 void BaseDisplay::removeTimer(BTimer *timer) {
303 timerList.release(timer);
308 * Grabs a button, but also grabs the button in every possible combination
309 * with the keyboard lock keys, so that they do not cancel out the event.
311 * if allow_scroll_lock is true then only the top half of the lock mask
312 * table is used and scroll lock is ignored. This value defaults to false.
314 void BaseDisplay::grabButton(unsigned int button, unsigned int modifiers,
315 Window grab_window, bool owner_events,
316 unsigned int event_mask, int pointer_mode,
317 int keyboard_mode, Window confine_to,
318 Cursor cursor, bool allow_scroll_lock) const {
319 unsigned int length = (allow_scroll_lock) ? MaskListLength / 2:
321 for (size_t cnt = 0; cnt < length; ++cnt)
322 XGrabButton(display, button, modifiers | MaskList[cnt], grab_window,
323 owner_events, event_mask, pointer_mode, keyboard_mode,
329 * Releases the grab on a button, and ungrabs all possible combinations of the
330 * keyboard lock keys.
332 void BaseDisplay::ungrabButton(unsigned int button, unsigned int modifiers,
333 Window grab_window) const {
334 for (size_t cnt = 0; cnt < MaskListLength; ++cnt)
335 XUngrabButton(display, button, modifiers | MaskList[cnt], grab_window);
339 const ScreenInfo* BaseDisplay::getScreenInfo(unsigned int s) const {
340 if (s < screenInfoList.size())
341 return &screenInfoList[s];
342 return (const ScreenInfo*) 0;
346 BGCCache* BaseDisplay::gcCache(void) const {
348 gccache = new BGCCache(this, screenInfoList.size());