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