1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
4 # include "../config.h"
8 #include "screeninfo.hh"
13 #include <X11/keysym.h>
16 #include <X11/XKBlib.h>
20 #include <X11/extensions/shape.h>
24 #include <X11/extensions/Xinerama.h>
29 #endif // HAVE_STDIO_H
33 #endif // HAVE_SIGNAL_H
37 #endif // HAVE_FCNTL_H
40 # include <sys/types.h>
42 #endif // HAVE_UNISTD_H
45 #define _(str) gettext(str)
51 ::Display *Display::display = (::Display*) 0;
52 bool Display::_xkb = false;
53 int Display::_xkb_event_basep = 0;
54 bool Display::_shape = false;
55 int Display::_shape_event_basep = 0;
56 bool Display::_xinerama = false;
57 int Display::_xinerama_event_basep = 0;
58 unsigned int Display::_mask_list[8];
59 unsigned int Display::_scrollLockMask = 0;
60 unsigned int Display::_numLockMask = 0;
61 Display::ScreenInfoList Display::_screenInfoList;
62 GCCache *Display::_gccache = (GCCache*) 0;
63 int Display::_grab_count = 0;
66 static int xerrorHandler(::Display *d, XErrorEvent *e)
71 //if (e->error_code != BadWindow)
73 XGetErrorText(d, e->error_code, errtxt, 128);
74 printf("X Error: %s\n", errtxt);
75 if (e->error_code != BadWindow)
87 void Display::initialize(char *name)
93 if (!(display = XOpenDisplay(name))) {
94 printf(_("Unable to open connection to the X server. Please set the \n\
95 DISPLAY environment variable approriately, or use the '-display' command \n\
96 line argument.\n\n"));
99 if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
100 printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
103 if (! XSupportsLocale())
104 printf(_("X server does not support locale.\n"));
105 if (XSetLocaleModifiers("") == NULL)
106 printf(_("Cannot set locale modifiers for the X server.\n"));
108 // set our error handler for X errors
109 XSetErrorHandler(xerrorHandler);
111 // set the DISPLAY environment variable for any lauched children, to the
112 // display we're using, so they open in the right place.
113 // XXX rm -> std::string dtmp = "DISPLAY=" + DisplayString(display);
114 putenv(std::string("DISPLAY=") + DisplayString(display));
116 // find the availability of X extensions we like to use
118 _xkb = XkbQueryExtension(display, &junk, &_xkb_event_basep, &junk, NULL,
123 _shape = XShapeQueryExtension(display, &_shape_event_basep, &junk);
127 _xinerama = XineramaQueryExtension(display, &_xinerama_event_basep, &junk);
130 // get lock masks that are defined by the display (not constant)
131 XModifierKeymap *modmap;
133 modmap = XGetModifierMapping(display);
134 if (modmap && modmap->max_keypermod > 0) {
135 const int mask_table[] = {
136 ShiftMask, LockMask, ControlMask, Mod1Mask,
137 Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
139 const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
140 modmap->max_keypermod;
141 // get the values of the keyboard lock modifiers
142 // Note: Caps lock is not retrieved the same way as Scroll and Num lock
143 // since it doesn't need to be.
144 const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock);
145 const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock);
147 for (size_t cnt = 0; cnt < size; ++cnt) {
148 if (! modmap->modifiermap[cnt]) continue;
150 if (num_lock == modmap->modifiermap[cnt])
151 _numLockMask = mask_table[cnt / modmap->max_keypermod];
152 if (scroll_lock == modmap->modifiermap[cnt])
153 _scrollLockMask = mask_table[cnt / modmap->max_keypermod];
157 if (modmap) XFreeModifiermap(modmap);
160 _mask_list[1] = LockMask;
161 _mask_list[2] = _numLockMask;
162 _mask_list[3] = LockMask | _numLockMask;
163 _mask_list[4] = _scrollLockMask;
164 _mask_list[5] = _scrollLockMask | LockMask;
165 _mask_list[6] = _scrollLockMask | _numLockMask;
166 _mask_list[7] = _scrollLockMask | LockMask | _numLockMask;
168 // Get information on all the screens which are available.
169 _screenInfoList.reserve(ScreenCount(display));
170 for (int i = 0; i < ScreenCount(display); ++i)
171 _screenInfoList.push_back(ScreenInfo(i));
173 _gccache = new GCCache(_screenInfoList.size());
177 void Display::destroy()
180 while (_grab_count > 0)
182 XCloseDisplay(display);
186 const ScreenInfo* Display::screenInfo(int snum) {
188 assert(snum < static_cast<int>(_screenInfoList.size()));
189 return &_screenInfoList[snum];
193 const ScreenInfo* Display::findScreen(Window root)
195 ScreenInfoList::iterator it, end = _screenInfoList.end();
196 for (it = _screenInfoList.begin(); it != end; ++it)
197 if (it->rootWindow() == root)
205 if (_grab_count == 0)
206 XGrabServer(display);
211 void Display::ungrab()
213 if (_grab_count == 0) return;
215 if (_grab_count == 0)
216 XUngrabServer(display);
226 * Grabs a button, but also grabs the button in every possible combination
227 * with the keyboard lock keys, so that they do not cancel out the event.
229 * if allow_scroll_lock is true then only the top half of the lock mask
230 * table is used and scroll lock is ignored. This value defaults to false.
232 void Display::grabButton(unsigned int button, unsigned int modifiers,
233 Window grab_window, bool owner_events,
234 unsigned int event_mask, int pointer_mode,
235 int keyboard_mode, Window confine_to,
236 Cursor cursor, bool allow_scroll_lock) {
237 unsigned int length = (allow_scroll_lock) ? 8 / 2:
239 for (size_t cnt = 0; cnt < length; ++cnt)
240 XGrabButton(Display::display, button, modifiers | _mask_list[cnt],
241 grab_window, owner_events, event_mask, pointer_mode,
242 keyboard_mode, confine_to, cursor);
247 * Releases the grab on a button, and ungrabs all possible combinations of the
248 * keyboard lock keys.
250 void Display::ungrabButton(unsigned int button, unsigned int modifiers,
251 Window grab_window) {
252 for (size_t cnt = 0; cnt < 8; ++cnt)
253 XUngrabButton(Display::display, button, modifiers | _mask_list[cnt],
257 void Display::grabKey(unsigned int keycode, unsigned int modifiers,
258 Window grab_window, bool owner_events,
259 int pointer_mode, int keyboard_mode,
260 bool allow_scroll_lock)
262 unsigned int length = (allow_scroll_lock) ? 8 / 2:
264 for (size_t cnt = 0; cnt < length; ++cnt)
265 XGrabKey(Display::display, keycode, modifiers | _mask_list[cnt],
266 grab_window, owner_events, pointer_mode, keyboard_mode);
269 void Display::ungrabKey(unsigned int keycode, unsigned int modifiers,
272 for (size_t cnt = 0; cnt < 8; ++cnt)
273 XUngrabKey(Display::display, keycode, modifiers | _mask_list[cnt],