Dogcows Code - chaz/openbox/blob - otk/display.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef HAVE_CONFIG_H
   4 # include "../config.h"
   5 #endif
   6
   7 #include "display.hh"
   8 #include "screeninfo.hh"
   9 #include "gccache.hh"
  10
  11 extern "C" {
  12 #include <X11/keysym.h>
  13
  14 #ifdef    XKB
  15 #include <X11/XKBlib.h>
  16 #endif // XKB
  17
  18 #ifdef    SHAPE
  19 #include <X11/extensions/shape.h>
  20 #endif // SHAPE
  21
  22 #ifdef    XINERAMA
  23 #include <X11/extensions/Xinerama.h>
  24 #endif // XINERAMA
  25
  26 #ifdef    HAVE_STDIO_H
  27 #  include <stdio.h>
  28 #endif // HAVE_STDIO_H
  29
  30 #ifdef    HAVE_STDLIB_H
  31 #  include <stdlib.h>
  32 #endif // HAVE_STDLIB_H
  33
  34 #ifdef    HAVE_SIGNAL_H
  35 #  include <signal.h>
  36 #endif // HAVE_SIGNAL_H
  37
  38 #ifdef    HAVE_FCNTL_H
  39 #  include <fcntl.h>
  40 #endif // HAVE_FCNTL_H
  41
  42 #ifdef    HAVE_UNISTD_H
  43 #  include <sys/types.h>
  44 #  include <unistd.h>
  45 #endif // HAVE_UNISTD_H
  46
  47 #include "gettext.h"
  48 #define _(str) gettext(str)
  49 }
  50
  51 namespace otk {
  52
  53
  54 Display *OBDisplay::display = (Display*) 0;
  55 bool OBDisplay::_xkb = false;
  56 int  OBDisplay::_xkb_event_basep = 0;
  57 bool OBDisplay::_shape = false;
  58 int  OBDisplay::_shape_event_basep = 0;
  59 bool OBDisplay::_xinerama = false;
  60 int  OBDisplay::_xinerama_event_basep = 0;
  61 unsigned int OBDisplay::_mask_list[8];
  62 unsigned int OBDisplay::_scrollLockMask = 0;
  63 unsigned int OBDisplay::_numLockMask = 0;
  64 OBDisplay::ScreenInfoList OBDisplay::_screenInfoList;
  65 BGCCache *OBDisplay::_gccache = (BGCCache*) 0;
  66 int OBDisplay::_grab_count = 0;
  67
  68
  69 int OBDisplay::xerrorHandler(Display *d, XErrorEvent *e)
  70 {
  71 #ifdef DEBUG
  72   char errtxt[128];
  73
  74   //if (e->error_code != BadWindow)
  75   {
  76     XGetErrorText(d, e->error_code, errtxt, 128);
  77     printf("X Error: %s\n", errtxt);
  78     if (e->error_code != BadWindow)
  79       abort();
  80   }
  81 #else
  82   (void)d;
  83   (void)e;
  84 #endif
  85
  86   return false;
  87 }
  88
  89
  90 void OBDisplay::initialize(char *name)
  91 {
  92   int junk;
  93   (void)junk;
  94
  95   // Open the X display
  96   if (!(display = XOpenDisplay(name))) {
  97     printf(_("Unable to open connection to the X server. Please set the \n\
  98 DISPLAY environment variable approriately, or use the '-display' command \n\
  99 line argument.\n\n"));
 100     ::exit(1);
 101   }
 102   if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
 103     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
 104     ::exit(1);
 105   }
 106
 107   // set our error handler for X errors
 108   XSetErrorHandler(xerrorHandler);
 109
 110   // set the DISPLAY environment variable for any lauched children, to the
 111   // display we're using, so they open in the right place.
 112   // XXX rm -> std::string dtmp = "DISPLAY=" + DisplayString(display);
 113   if (putenv(const_cast<char*>((std::string("DISPLAY=") +
 114                                 DisplayString(display)).c_str()))) {
 115     printf(_("warning: couldn't set environment variable 'DISPLAY'\n"));
 116     perror("putenv()");
 117   }
 118
 119   // find the availability of X extensions we like to use
 120 #ifdef XKB
 121   _xkb = XkbQueryExtension(display, &junk, &_xkb_event_basep, &junk, NULL,
 122                            NULL);
 123 #endif
 124
 125 #ifdef SHAPE
 126   _shape = XShapeQueryExtension(display, &_shape_event_basep, &junk);
 127 #endif
 128
 129 #ifdef XINERAMA
 130   _xinerama = XineramaQueryExtension(display, &_xinerama_event_basep, &junk);
 131 #endif // XINERAMA
 132
 133   // get lock masks that are defined by the display (not constant)
 134   XModifierKeymap *modmap;
 135
 136   modmap = XGetModifierMapping(display);
 137   if (modmap && modmap->max_keypermod > 0) {
 138     const int mask_table[] = {
 139       ShiftMask, LockMask, ControlMask, Mod1Mask,
 140       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 141     };
 142     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 143       modmap->max_keypermod;
 144     // get the values of the keyboard lock modifiers
 145     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 146     // since it doesn't need to be.
 147     const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock);
 148     const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock);
 149
 150     for (size_t cnt = 0; cnt < size; ++cnt) {
 151       if (! modmap->modifiermap[cnt]) continue;
 152
 153       if (num_lock == modmap->modifiermap[cnt])
 154         _numLockMask = mask_table[cnt / modmap->max_keypermod];
 155       if (scroll_lock == modmap->modifiermap[cnt])
 156         _scrollLockMask = mask_table[cnt / modmap->max_keypermod];
 157     }
 158   }
 159
 160   if (modmap) XFreeModifiermap(modmap);
 161
 162   _mask_list[0] = 0;
 163   _mask_list[1] = LockMask;
 164   _mask_list[2] = _numLockMask;
 165   _mask_list[3] = LockMask | _numLockMask;
 166   _mask_list[4] = _scrollLockMask;
 167   _mask_list[5] = _scrollLockMask | LockMask;
 168   _mask_list[6] = _scrollLockMask | _numLockMask;
 169   _mask_list[7] = _scrollLockMask | LockMask | _numLockMask;
 170
 171   // Get information on all the screens which are available.
 172   _screenInfoList.reserve(ScreenCount(display));
 173   for (int i = 0; i < ScreenCount(display); ++i)
 174     _screenInfoList.push_back(ScreenInfo(i));
 175
 176   _gccache = new BGCCache(_screenInfoList.size());
 177 }
 178
 179
 180 void OBDisplay::destroy()
 181 {
 182   delete _gccache;
 183   while (_grab_count > 0)
 184     ungrab();
 185   XCloseDisplay(display);
 186 }
 187
 188
 189 const ScreenInfo* OBDisplay::screenInfo(int snum) {
 190   assert(snum >= 0);
 191   assert(snum < static_cast<int>(_screenInfoList.size()));
 192   return &_screenInfoList[snum];
 193 }
 194
 195
 196 const ScreenInfo* OBDisplay::findScreen(Window root)
 197 {
 198   ScreenInfoList::iterator it, end = _screenInfoList.end();
 199   for (it = _screenInfoList.begin(); it != end; ++it)
 200     if (it->rootWindow() == root)
 201       return &(*it);
 202   return 0;
 203 }
 204
 205
 206 void OBDisplay::grab()
 207 {
 208   if (_grab_count == 0)
 209     XGrabServer(display);
 210   _grab_count++;
 211 }
 212
 213
 214 void OBDisplay::ungrab()
 215 {
 216   if (_grab_count == 0) return;
 217   _grab_count--;
 218   if (_grab_count == 0)
 219     XUngrabServer(display);
 220 }
 221
 222
 223
 224
 225
 226
 227
 228 /*
 229  * Grabs a button, but also grabs the button in every possible combination
 230  * with the keyboard lock keys, so that they do not cancel out the event.
 231
 232  * if allow_scroll_lock is true then only the top half of the lock mask
 233  * table is used and scroll lock is ignored.  This value defaults to false.
 234  */
 235 void OBDisplay::grabButton(unsigned int button, unsigned int modifiers,
 236                          Window grab_window, bool owner_events,
 237                          unsigned int event_mask, int pointer_mode,
 238                          int keyboard_mode, Window confine_to,
 239                          Cursor cursor, bool allow_scroll_lock) {
 240   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 241                                               8;
 242   for (size_t cnt = 0; cnt < length; ++cnt)
 243     XGrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt],
 244                 grab_window, owner_events, event_mask, pointer_mode,
 245                 keyboard_mode, confine_to, cursor);
 246 }
 247
 248
 249 /*
 250  * Releases the grab on a button, and ungrabs all possible combinations of the
 251  * keyboard lock keys.
 252  */
 253 void OBDisplay::ungrabButton(unsigned int button, unsigned int modifiers,
 254                            Window grab_window) {
 255   for (size_t cnt = 0; cnt < 8; ++cnt)
 256     XUngrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt],
 257                   grab_window);
 258 }
 259
 260 void OBDisplay::grabKey(unsigned int keycode, unsigned int modifiers,
 261                         Window grab_window, bool owner_events,
 262                         int pointer_mode, int keyboard_mode,
 263                         bool allow_scroll_lock)
 264 {
 265   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 266                                               8;
 267   for (size_t cnt = 0; cnt < length; ++cnt)
 268     XGrabKey(otk::OBDisplay::display, keycode, modifiers | _mask_list[cnt],
 269                 grab_window, owner_events, pointer_mode, keyboard_mode);
 270 }
 271
 272 void OBDisplay::ungrabKey(unsigned int keycode, unsigned int modifiers,
 273                           Window grab_window)
 274 {
 275   for (size_t cnt = 0; cnt < 8; ++cnt)
 276     XUngrabKey(otk::OBDisplay::display, keycode, modifiers | _mask_list[cnt],
 277                grab_window);
 278 }
 279
 280 }