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Diffstat (limited to 'src/basedisplay.cc')
| -rw-r--r-- | src/basedisplay.cc | 521 |
1 files changed, 521 insertions, 0 deletions
diff --git a/src/basedisplay.cc b/src/basedisplay.cc new file mode 100644 index 00000000..65574d65 --- /dev/null +++ b/src/basedisplay.cc @@ -0,0 +1,521 @@ +// -*- mode: C++; indent-tabs-mode: nil; -*- +// BaseDisplay.cc for Blackbox - an X11 Window manager +// Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh@debian.org> +// Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net) +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#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 + +#ifndef SA_NODEFER +# ifdef SA_INTERRUPT +# define SA_NODEFER SA_INTERRUPT +# else // !SA_INTERRUPT +# define SA_NODEFER (0) +# endif // SA_INTERRUPT +#endif // SA_NODEFER + +#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 "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); + fprintf(stderr, + i18n(BaseDisplaySet, BaseDisplayXError, + "%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 + +#ifndef HAVE_SIGACTION +static RETSIGTYPE signalhandler(int sig) { +#else // HAVE_SIGACTION +static void signalhandler(int sig) { +#endif // HAVE_SIGACTION + + static int re_enter = 0; + + switch (sig) { + case SIGCHLD: + int status; + waitpid(-1, &status, WNOHANG | WUNTRACED); + +#ifndef HAVE_SIGACTION + // assume broken, braindead sysv signal semantics + signal(SIGCHLD, (RETSIGTYPE (*)(int)) signalhandler); +#endif // HAVE_SIGACTION + + break; + + default: + if (base_display->handleSignal(sig)) { + +#ifndef HAVE_SIGACTION + // assume broken, braindead sysv signal semantics + signal(sig, (RETSIGTYPE (*)(int)) signalhandler); +#endif // HAVE_SIGACTION + + return; + } + + fprintf(stderr, i18n(BaseDisplaySet, BaseDisplaySignalCaught, + "%s: signal %d caught\n"), + base_display->getApplicationName(), sig); + + if (! base_display->isStartup() && ! re_enter) { + internal_error = True; + + re_enter = 1; + fprintf(stderr, i18n(BaseDisplaySet, BaseDisplayShuttingDown, + "shutting down\n")); + base_display->shutdown(); + } + + if (sig != SIGTERM && sig != SIGINT) { + fprintf(stderr, i18n(BaseDisplaySet, BaseDisplayAborting, + "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; + +#ifdef HAVE_SIGACTION + 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); +#else // !HAVE_SIGACTION + signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGUSR1, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGUSR2, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGCHLD, (RETSIGTYPE (*)(int)) signalhandler); +#endif // HAVE_SIGACTION + + if (! (display = XOpenDisplay(dpy_name))) { + fprintf(stderr, + i18n(BaseDisplaySet, BaseDisplayXConnectFail, + "BaseDisplay::BaseDisplay: connection to X server failed.\n")); + ::exit(2); + } else if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) { + fprintf(stderr, + i18n(BaseDisplaySet, BaseDisplayCloseOnExecFail, + "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; +} + + +ScreenInfo::ScreenInfo(BaseDisplay *d, unsigned int num) { + basedisplay = d; + screen_number = num; + + root_window = RootWindow(basedisplay->getXDisplay(), screen_number); + + rect.setSize(WidthOfScreen(ScreenOfDisplay(basedisplay->getXDisplay(), + screen_number)), + HeightOfScreen(ScreenOfDisplay(basedisplay->getXDisplay(), + screen_number))); + /* + If the default depth is at least 8 we will use that, + otherwise we try to find the largest TrueColor visual. + Preference is given to 24 bit over larger depths if 24 bit is an option. + */ + + depth = DefaultDepth(basedisplay->getXDisplay(), screen_number); + visual = DefaultVisual(basedisplay->getXDisplay(), screen_number); + colormap = DefaultColormap(basedisplay->getXDisplay(), screen_number); + + if (depth < 8) { + // search for a TrueColor Visual... if we can't find one... + // we will use the default visual for the screen + XVisualInfo vinfo_template, *vinfo_return; + int vinfo_nitems; + int best = -1; + + vinfo_template.screen = screen_number; + vinfo_template.c_class = TrueColor; + + vinfo_return = XGetVisualInfo(basedisplay->getXDisplay(), + VisualScreenMask | VisualClassMask, + &vinfo_template, &vinfo_nitems); + if (vinfo_return) { + int max_depth = 1; + for (int i = 0; i < vinfo_nitems; ++i) { + if (vinfo_return[i].depth > max_depth) { + if (max_depth == 24 && vinfo_return[i].depth > 24) + break; // prefer 24 bit over 32 + max_depth = vinfo_return[i].depth; + best = i; + } + } + if (max_depth < depth) best = -1; + } + + if (best != -1) { + depth = vinfo_return[best].depth; + visual = vinfo_return[best].visual; + colormap = XCreateColormap(basedisplay->getXDisplay(), root_window, + visual, AllocNone); + } + + XFree(vinfo_return); + } + + // get the default display string and strip the screen number + string default_string = DisplayString(basedisplay->getXDisplay()); + const string::size_type pos = default_string.rfind("."); + if (pos != string::npos) + default_string.resize(pos); + + display_string = string("DISPLAY=") + default_string + '.' + + itostring(static_cast<unsigned long>(screen_number)); + +#ifdef XINERAMA + xinerama_active = False; + + if (d->hasXineramaExtensions()) { + if (d->getXineramaMajorVersion() == 1) { + // we know the version 1(.1?) protocol + + /* + in this version of Xinerama, we can't query on a per-screen basis, but + in future versions we should be able, so the 'activeness' is checked + on a pre-screen basis anyways. + */ + if (XineramaIsActive(d->getXDisplay())) { + /* + If Xinerama is being used, there there is only going to be one screen + present. We still, of course, want to use the screen class, but that + is why no screen number is used in this function call. There should + never be more than one screen present with Xinerama active. + */ + int num; + XineramaScreenInfo *info = XineramaQueryScreens(d->getXDisplay(), &num); + if (num > 0 && info) { + xinerama_areas.reserve(num); + for (int i = 0; i < num; ++i) { + xinerama_areas.push_back(Rect(info[i].x_org, info[i].y_org, + info[i].width, info[i].height)); + } + XFree(info); + + // if we can't find any xinerama regions, then we act as if it is not + // active, even though it said it was + xinerama_active = True; + } + } + } + } +#endif // XINERAMA +} |