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