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 "rendercontrol.hh"
  10 #include "util.hh"
  11
  12 extern "C" {
  13 #include <X11/keysym.h>
  14
  15 #ifdef    XKB
  16 #include <X11/XKBlib.h>
  17 #endif // XKB
  18
  19 #ifdef    SHAPE
  20 #include <X11/extensions/shape.h>
  21 #endif // SHAPE
  22
  23 #ifdef    XINERAMA
  24 #include <X11/extensions/Xinerama.h>
  25 #endif // XINERAMA
  26
  27 #ifdef    HAVE_STDIO_H
  28 #  include <stdio.h>
  29 #endif // HAVE_STDIO_H
  30
  31 #ifdef    HAVE_SIGNAL_H
  32 #  include <signal.h>
  33 #endif // HAVE_SIGNAL_H
  34
  35 #ifdef    HAVE_FCNTL_H
  36 #  include <fcntl.h>
  37 #endif // HAVE_FCNTL_H
  38
  39 #ifdef    HAVE_UNISTD_H
  40 #  include <sys/types.h>
  41 #  include <unistd.h>
  42 #endif // HAVE_UNISTD_H
  43
  44 #include "gettext.h"
  45 #define _(str) gettext(str)
  46 }
  47
  48 namespace otk {
  49
  50
  51 Display *display = (Display*) 0;
  52
  53 static int xerrorHandler(::Display *d, XErrorEvent *e)
  54 {
  55 #ifdef DEBUG
  56   char errtxt[128];
  57
  58   //if (e->error_code != BadWindow)
  59   {
  60     XGetErrorText(d, e->error_code, errtxt, 128);
  61     printf("X Error: %s\n", errtxt);
  62     if (e->error_code != BadWindow)
  63       abort();
  64   }
  65 #else
  66   (void)d;
  67   (void)e;
  68 #endif
  69
  70   return false;
  71 }
  72
  73
  74 Display::Display()
  75   : _display(0),
  76     _xkb(false),
  77     _xkb_event_basep(0),
  78     _shape(false),
  79     _shape_event_basep(0),
  80     _xinerama(false),
  81     _xinerama_event_basep(0),
  82     _mask_list(),
  83     _num_lock_mask(0),
  84     _scroll_lock_mask(0),
  85     _grab_count(0),
  86     _screeninfo_list(0),
  87     _rendercontrol_list(0)
  88 {
  89   int junk;
  90   (void)junk;
  91
  92   display = this;
  93
  94   // Open the X display
  95   if (!(_display = XOpenDisplay(NULL))) {
  96     printf(_("Unable to open connection to the X server. Please set the \n\
  97 DISPLAY environment variable approriately.\n\n"));
  98     ::exit(1);
  99   }
 100   if (fcntl(ConnectionNumber(_display), F_SETFD, 1) == -1) {
 101     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
 102     ::exit(1);
 103   }
 104   if (!XSupportsLocale())
 105     printf(_("X server does not support locale.\n"));
 106   if (!XSetLocaleModifiers(""))
 107     printf(_("Cannot set locale modifiers for the X server.\n"));
 108
 109   // set our error handler for X errors
 110   XSetErrorHandler(xerrorHandler);
 111
 112   // set the DISPLAY environment variable for any lauched children, to the
 113   // display we're using, so they open in the right place.
 114   putenv(std::string("DISPLAY=") + DisplayString(_display));
 115
 116   // find the availability of X extensions we like to use
 117 #ifdef XKB
 118   _xkb = XkbQueryExtension(_display, &junk, &_xkb_event_basep, &junk, NULL,
 119                            NULL);
 120 #endif
 121
 122 #ifdef SHAPE
 123   _shape = XShapeQueryExtension(_display, &_shape_event_basep, &junk);
 124 #endif
 125
 126 #ifdef XINERAMA
 127   _xinerama = XineramaQueryExtension(_display, &_xinerama_event_basep, &junk);
 128 #endif // XINERAMA
 129
 130   // get lock masks that are defined by the display (not constant)
 131   _modmap = XGetModifierMapping(_display);
 132   assert(_modmap);
 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         _num_lock_mask = mask_table[cnt / _modmap->max_keypermod];
 151       if (scroll_lock == _modmap->modifiermap[cnt])
 152         _scroll_lock_mask = mask_table[cnt / _modmap->max_keypermod];
 153     }
 154   }
 155
 156   _mask_list[0] = 0;
 157   _mask_list[1] = LockMask;
 158   _mask_list[2] = _num_lock_mask;
 159   _mask_list[3] = LockMask | _num_lock_mask;
 160   _mask_list[4] = _scroll_lock_mask;
 161   _mask_list[5] = _scroll_lock_mask | LockMask;
 162   _mask_list[6] = _scroll_lock_mask | _num_lock_mask;
 163   _mask_list[7] = _scroll_lock_mask | LockMask | _num_lock_mask;
 164
 165   // Get information on all the screens which are available, and create their
 166   // RenderControl
 167   _screeninfo_list = new ScreenInfo*[ScreenCount(_display)];
 168   _rendercontrol_list = new RenderControl*[ScreenCount(_display)];
 169   for (int i = 0; i < ScreenCount(_display); ++i) {
 170     _screeninfo_list[i] = new ScreenInfo(i);
 171     _rendercontrol_list[i] = RenderControl::getRenderControl(i);
 172   }
 173 }
 174
 175
 176 Display::~Display()
 177 {
 178   while (_grab_count > 0)
 179     ungrab();
 180
 181   XFreeModifiermap(_modmap);
 182
 183   for (int i = 0; i < ScreenCount(_display); ++i) {
 184     delete _rendercontrol_list[i];
 185     delete _screeninfo_list[i];
 186   }
 187   delete [] _rendercontrol_list;
 188   delete [] _screeninfo_list;
 189
 190   XCloseDisplay(_display);
 191 }
 192
 193
 194 const ScreenInfo* Display::screenInfo(int snum) const
 195 {
 196   assert(snum >= 0);
 197   assert(snum < (signed) ScreenCount(_display));
 198   return _screeninfo_list[snum];
 199 }
 200
 201
 202 const ScreenInfo* Display::findScreen(Window root) const
 203 {
 204   for (int i = 0; i < ScreenCount(_display); ++i)
 205     if (_screeninfo_list[i]->rootWindow() == root)
 206       return _screeninfo_list[i];
 207   return 0;
 208 }
 209
 210
 211 const RenderControl *Display::renderControl(int snum) const
 212 {
 213   assert(snum >= 0);
 214   assert(snum < (signed) ScreenCount(_display));
 215   return _rendercontrol_list[snum];
 216 }
 217
 218
 219 void Display::grab()
 220 {
 221   if (_grab_count == 0)
 222     XGrabServer(_display);
 223   _grab_count++;
 224 }
 225
 226
 227 void Display::ungrab()
 228 {
 229   if (_grab_count == 0) return;
 230   _grab_count--;
 231   if (_grab_count == 0)
 232     XUngrabServer(_display);
 233 }
 234
 235
 236
 237
 238
 239
 240
 241 /*
 242  * Grabs a button, but also grabs the button in every possible combination
 243  * with the keyboard lock keys, so that they do not cancel out the event.
 244
 245  * if allow_scroll_lock is true then only the top half of the lock mask
 246  * table is used and scroll lock is ignored.  This value defaults to false.
 247  */
 248 void Display::grabButton(unsigned int button, unsigned int modifiers,
 249                          Window grab_window, bool owner_events,
 250                          unsigned int event_mask, int pointer_mode,
 251                          int keyboard_mode, Window confine_to,
 252                          Cursor cursor, bool allow_scroll_lock) const
 253 {
 254   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 255                                               8;
 256   for (size_t cnt = 0; cnt < length; ++cnt)
 257     XGrabButton(_display, button, modifiers | _mask_list[cnt],
 258                 grab_window, owner_events, event_mask, pointer_mode,
 259                 keyboard_mode, confine_to, cursor);
 260 }
 261
 262
 263 /*
 264  * Releases the grab on a button, and ungrabs all possible combinations of the
 265  * keyboard lock keys.
 266  */
 267 void Display::ungrabButton(unsigned int button, unsigned int modifiers,
 268                            Window grab_window) const
 269 {
 270   for (size_t cnt = 0; cnt < 8; ++cnt)
 271     XUngrabButton(_display, button, modifiers | _mask_list[cnt],
 272                   grab_window);
 273 }
 274
 275 void Display::grabKey(unsigned int keycode, unsigned int modifiers,
 276                         Window grab_window, bool owner_events,
 277                         int pointer_mode, int keyboard_mode,
 278                         bool allow_scroll_lock) const
 279 {
 280   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 281                                               8;
 282   for (size_t cnt = 0; cnt < length; ++cnt)
 283     XGrabKey(_display, keycode, modifiers | _mask_list[cnt],
 284                 grab_window, owner_events, pointer_mode, keyboard_mode);
 285 }
 286
 287 void Display::ungrabKey(unsigned int keycode, unsigned int modifiers,
 288                           Window grab_window) const
 289 {
 290   for (size_t cnt = 0; cnt < 8; ++cnt)
 291     XUngrabKey(_display, keycode, modifiers | _mask_list[cnt],
 292                grab_window);
 293 }
 294
 295 }