otk/display.cc (raw)
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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*- #include "config.h" #include "display.hh" #include "util.hh" extern "C" { #include <X11/keysym.h> #ifdef XKB #include <X11/XKBlib.h> #endif // XKB #ifdef SHAPE #include <X11/extensions/shape.h> #endif // SHAPE #ifdef XINERAMA #include <X11/extensions/Xinerama.h> #endif // XINERAMA #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 "../src/gettext.h" #define _(str) gettext(str) } #include <cstdio> namespace otk { Display *display = (Display*) 0; static int xerrorHandler(::Display *d, XErrorEvent *e) { if (!display->ignoreErrors()) { #ifdef DEBUG char errtxt[128]; //if (e->error_code != BadWindow) { XGetErrorText(d, e->error_code, errtxt, 127); printf("X Error: %s\n", errtxt); if (e->error_code != BadWindow) abort(); } #else (void)d; (void)e; #endif } return false; } Display::Display(::Display *d) : _display(d), _xkb(false), _xkb_event_basep(0), _shape(false), _shape_event_basep(0), _xinerama(false), _xinerama_event_basep(0), _mask_list(), _num_lock_mask(0), _scroll_lock_mask(0), _grab_count(0) { int junk; (void)junk; assert(_display); display = this; if (fcntl(ConnectionNumber(_display), F_SETFD, 1) == -1) { printf(_("Couldn't mark display connection as close-on-exec.\n\n")); ::exit(1); } if (!XSupportsLocale()) printf(_("X server does not support locale.\n")); if (!XSetLocaleModifiers("")) printf(_("Cannot set locale modifiers for the X server.\n")); // 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. putenv(std::string("DISPLAY=") + DisplayString(_display)); // find the availability of X extensions we like to use #ifdef XKB _xkb = XkbQueryExtension(_display, &junk, &_xkb_event_basep, &junk, NULL, NULL); #endif #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) _modmap = XGetModifierMapping(_display); assert(_modmap); 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]) _num_lock_mask = mask_table[cnt / _modmap->max_keypermod]; if (scroll_lock == _modmap->modifiermap[cnt]) _scroll_lock_mask = mask_table[cnt / _modmap->max_keypermod]; } } _mask_list[0] = 0; _mask_list[1] = LockMask; _mask_list[2] = _num_lock_mask; _mask_list[3] = LockMask | _num_lock_mask; _mask_list[4] = _scroll_lock_mask; _mask_list[5] = _scroll_lock_mask | LockMask; _mask_list[6] = _scroll_lock_mask | _num_lock_mask; _mask_list[7] = _scroll_lock_mask | LockMask | _num_lock_mask; /* 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. */ int screen = DefaultScreen(_display); _depth = DefaultDepth(_display, screen); _visual = DefaultVisual(_display, screen); _colormap = DefaultColormap(_display, screen); 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; vinfo_template.c_class = TrueColor; vinfo_return = XGetVisualInfo(_display, 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(_display, RootWindow(_display, screen), _visual, AllocNone); } XFree(vinfo_return); } } Display::~Display() { while (_grab_count > 0) ungrab(); XFreeModifiermap(_modmap); XCloseDisplay(_display); } void Display::setIgnoreErrors(bool t) { // sync up so that anything already sent is/isn't ignored! XSync(_display, false); _ignore_errors = t; } void Display::grab() { if (_grab_count == 0) { XGrabServer(_display); XSync(_display, false); // make sure it kicks in } _grab_count++; } void Display::ungrab() { if (_grab_count == 0) return; _grab_count--; if (_grab_count == 0) { XUngrabServer(_display); XFlush(_display); // ungrab as soon as possible } } /* * 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 Display::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) ? 8 / 2: 8; for (size_t cnt = 0; cnt < length; ++cnt) XGrabButton(_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 Display::ungrabButton(unsigned int button, unsigned int modifiers, Window grab_window) const { for (size_t cnt = 0; cnt < 8; ++cnt) XUngrabButton(_display, button, modifiers | _mask_list[cnt], grab_window); } void Display::grabKey(unsigned int keycode, unsigned int modifiers, Window grab_window, bool owner_events, int pointer_mode, int keyboard_mode, bool allow_scroll_lock) const { unsigned int length = (allow_scroll_lock) ? 8 / 2: 8; for (size_t cnt = 0; cnt < length; ++cnt) XGrabKey(_display, keycode, modifiers | _mask_list[cnt], grab_window, owner_events, pointer_mode, keyboard_mode); } void Display::ungrabKey(unsigned int keycode, unsigned int modifiers, Window grab_window) const { for (size_t cnt = 0; cnt < 8; ++cnt) XUngrabKey(_display, keycode, modifiers | _mask_list[cnt], grab_window); } void Display::ungrabAllKeys(Window grab_window) const { XUngrabKey(_display, AnyKey, AnyModifier, grab_window); } } |