otk/display.cc (raw)
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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*- #ifdef HAVE_CONFIG_H # include "../config.h" #endif #include "display.hh" #include "screeninfo.hh" #include "gccache.hh" extern "C" { #include <X11/keysym.h> #ifdef SHAPE #include <X11/extensions/shape.h> #endif // SHAPE #ifdef HAVE_STDIO_H # include <stdio.h> #endif // HAVE_STDIO_H #ifdef HAVE_STDLIB_H # include <stdlib.h> #endif // HAVE_STDLIB_H #ifdef HAVE_SIGNAL_H # include <signal.h> #endif // HAVE_SIGNAL_H #ifdef HAVE_FCNTL_H # include <fcntl.h> #endif // HAVE_FCNTL_H #ifdef HAVE_UNISTD_H # include <sys/types.h> # include <unistd.h> #endif // HAVE_UNISTD_H #include "gettext.h" #define _(str) gettext(str) } namespace otk { Display *OBDisplay::display = (Display*) 0; bool OBDisplay::_shape = false; int OBDisplay::_shape_event_basep = 0; bool OBDisplay::_xinerama = false; int OBDisplay::_xinerama_event_basep = 0; unsigned int OBDisplay::_mask_list[8]; OBDisplay::ScreenInfoList OBDisplay::_screenInfoList; BGCCache *OBDisplay::_gccache = (BGCCache*) 0; int OBDisplay::_grab_count = 0; int OBDisplay::xerrorHandler(Display *d, XErrorEvent *e) { #ifdef DEBUG char errtxt[128]; //if (e->error_code != BadWindow) { XGetErrorText(d, e->error_code, errtxt, 128); printf("X Error: %s\n", errtxt); } #else (void)d; (void)e; #endif return false; } void OBDisplay::initialize(char *name) { int junk; (void)junk; // Open the X display if (!(display = XOpenDisplay(name))) { printf(_("Unable to open connection to the X server. Please set the \n\ DISPLAY environment variable approriately, or use the '-display' command \n\ line argument.\n\n")); ::exit(1); } if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) { printf(_("Couldn't mark display connection as close-on-exec.\n\n")); ::exit(1); } // set our error handler for X errors XSetErrorHandler(xerrorHandler); // set the DISPLAY environment variable for any lauched children, to the // display we're using, so they open in the right place. // XXX rm -> std::string dtmp = "DISPLAY=" + DisplayString(display); if (putenv(const_cast<char*>((std::string("DISPLAY=") + DisplayString(display)).c_str()))) { printf(_("warning: couldn't set environment variable 'DISPLAY'\n")); perror("putenv()"); } // find the availability of X extensions we like to use #ifdef SHAPE _shape = XShapeQueryExtension(display, &_shape_event_basep, &junk); #endif #ifdef XINERAMA _xinerama = XineramaQueryExtension(display, &_xinerama_event_basep, &junk); #endif // XINERAMA // get lock masks that are defined by the display (not constant) XModifierKeymap *modmap; unsigned int NumLockMask = 0, ScrollLockMask = 0; 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]; } } if (modmap) XFreeModifiermap(modmap); _mask_list[0] = 0; _mask_list[1] = LockMask; _mask_list[2] = NumLockMask; _mask_list[3] = LockMask | NumLockMask; _mask_list[4] = ScrollLockMask; _mask_list[5] = ScrollLockMask | LockMask; _mask_list[6] = ScrollLockMask | NumLockMask; _mask_list[7] = ScrollLockMask | LockMask | NumLockMask; // Get information on all the screens which are available. _screenInfoList.reserve(ScreenCount(display)); for (int i = 0; i < ScreenCount(display); ++i) _screenInfoList.push_back(ScreenInfo(i)); _gccache = new BGCCache(_screenInfoList.size()); } void OBDisplay::destroy() { delete _gccache; XCloseDisplay(display); } const ScreenInfo* OBDisplay::screenInfo(int snum) { assert(snum >= 0); assert(snum < static_cast<int>(_screenInfoList.size())); return &_screenInfoList[snum]; } void OBDisplay::grab() { if (_grab_count == 0) XGrabServer(display); _grab_count++; } void OBDisplay::ungrab() { if (_grab_count == 0) return; _grab_count--; if (_grab_count == 0) XUngrabServer(display); } /* * 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 OBDisplay::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) { unsigned int length = (allow_scroll_lock) ? 8 / 2: 8; for (size_t cnt = 0; cnt < length; ++cnt) XGrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[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 OBDisplay::ungrabButton(unsigned int button, unsigned int modifiers, Window grab_window) { for (size_t cnt = 0; cnt < 8; ++cnt) XUngrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt], grab_window); } } |