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