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 "../src/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   if (!display->ignoreErrors()) {
  56 #ifdef DEBUG
  57     char errtxt[128];
  58
  59     //if (e->error_code != BadWindow)
  60     {
  61       XGetErrorText(d, e->error_code, errtxt, 128);
  62       printf("X Error: %s\n", errtxt);
  63       if (e->error_code != BadWindow)
  64         abort();
  65     }
  66 #else
  67     (void)d;
  68     (void)e;
  69 #endif
  70   }
  71   return false;
  72 }
  73
  74
  75 Display::Display()
  76   : _display(0),
  77     _xkb(false),
  78     _xkb_event_basep(0),
  79     _shape(false),
  80     _shape_event_basep(0),
  81     _xinerama(false),
  82     _xinerama_event_basep(0),
  83     _mask_list(),
  84     _num_lock_mask(0),
  85     _scroll_lock_mask(0),
  86     _grab_count(0),
  87     _screeninfo_list(0),
  88     _rendercontrol_list(0)
  89 {
  90   int junk;
  91   (void)junk;
  92
  93   display = this;
  94
  95   // Open the X display
  96   if (!(_display = XOpenDisplay(NULL))) {
  97     printf(_("Unable to open connection to the X server. Please set the \n\
  98 DISPLAY environment variable approriately.\n\n"));
  99     ::exit(1);
 100   }
 101   if (fcntl(ConnectionNumber(_display), F_SETFD, 1) == -1) {
 102     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
 103     ::exit(1);
 104   }
 105   if (!XSupportsLocale())
 106     printf(_("X server does not support locale.\n"));
 107   if (!XSetLocaleModifiers(""))
 108     printf(_("Cannot set locale modifiers for the X server.\n"));
 109
 110   // set our error handler for X errors
 111   XSetErrorHandler(xerrorHandler);
 112
 113   // set the DISPLAY environment variable for any lauched children, to the
 114   // display we're using, so they open in the right place.
 115   putenv(std::string("DISPLAY=") + DisplayString(_display));
 116
 117   // find the availability of X extensions we like to use
 118 #ifdef XKB
 119   _xkb = XkbQueryExtension(_display, &junk, &_xkb_event_basep, &junk, NULL,
 120                            NULL);
 121 #endif
 122
 123 #ifdef SHAPE
 124   _shape = XShapeQueryExtension(_display, &_shape_event_basep, &junk);
 125 #endif
 126
 127 #ifdef XINERAMA
 128   _xinerama = XineramaQueryExtension(_display, &_xinerama_event_basep, &junk);
 129 #endif // XINERAMA
 130
 131   // get lock masks that are defined by the display (not constant)
 132   _modmap = XGetModifierMapping(_display);
 133   assert(_modmap);
 134   if (_modmap && _modmap->max_keypermod > 0) {
 135     const int mask_table[] = {
 136       ShiftMask, LockMask, ControlMask, Mod1Mask,
 137       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 138     };
 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);
 146
 147     for (size_t cnt = 0; cnt < size; ++cnt) {
 148       if (! _modmap->modifiermap[cnt]) continue;
 149
 150       if (num_lock == _modmap->modifiermap[cnt])
 151         _num_lock_mask = mask_table[cnt / _modmap->max_keypermod];
 152       if (scroll_lock == _modmap->modifiermap[cnt])
 153         _scroll_lock_mask = mask_table[cnt / _modmap->max_keypermod];
 154     }
 155   }
 156
 157   _mask_list[0] = 0;
 158   _mask_list[1] = LockMask;
 159   _mask_list[2] = _num_lock_mask;
 160   _mask_list[3] = LockMask | _num_lock_mask;
 161   _mask_list[4] = _scroll_lock_mask;
 162   _mask_list[5] = _scroll_lock_mask | LockMask;
 163   _mask_list[6] = _scroll_lock_mask | _num_lock_mask;
 164   _mask_list[7] = _scroll_lock_mask | LockMask | _num_lock_mask;
 165
 166   // Get information on all the screens which are available, and create their
 167   // RenderControl
 168   _screeninfo_list = new ScreenInfo*[ScreenCount(_display)];
 169   _rendercontrol_list = new RenderControl*[ScreenCount(_display)];
 170   for (int i = 0; i < ScreenCount(_display); ++i) {
 171     _screeninfo_list[i] = new ScreenInfo(i);
 172     _rendercontrol_list[i] = RenderControl::getRenderControl(i);
 173   }
 174 }
 175
 176
 177 Display::~Display()
 178 {
 179   while (_grab_count > 0)
 180     ungrab();
 181
 182   XFreeModifiermap(_modmap);
 183
 184   for (int i = 0; i < ScreenCount(_display); ++i) {
 185     delete _rendercontrol_list[i];
 186     delete _screeninfo_list[i];
 187   }
 188   delete [] _rendercontrol_list;
 189   delete [] _screeninfo_list;
 190
 191   XCloseDisplay(_display);
 192 }
 193
 194
 195 const ScreenInfo* Display::screenInfo(int snum) const
 196 {
 197   assert(snum >= 0);
 198   assert(snum < (signed) ScreenCount(_display));
 199   return _screeninfo_list[snum];
 200 }
 201
 202
 203 const ScreenInfo* Display::findScreen(Window root) const
 204 {
 205   for (int i = 0; i < ScreenCount(_display); ++i)
 206     if (_screeninfo_list[i]->rootWindow() == root)
 207       return _screeninfo_list[i];
 208   return 0;
 209 }
 210
 211
 212 const RenderControl *Display::renderControl(int snum) const
 213 {
 214   assert(snum >= 0);
 215   assert(snum < (signed) ScreenCount(_display));
 216   return _rendercontrol_list[snum];
 217 }
 218
 219
 220 void Display::setIgnoreErrors(bool t)
 221 {
 222   _ignore_errors = t;
 223   // sync up so that anything already sent is/isn't ignored!
 224   XSync(_display, false);
 225 }
 226
 227 void Display::grab()
 228 {
 229   if (_grab_count == 0) {
 230     XGrabServer(_display);
 231     XSync(_display, false); // make sure it kicks in
 232   }
 233   _grab_count++;
 234 }
 235
 236
 237 void Display::ungrab()
 238 {
 239   if (_grab_count == 0) return;
 240   _grab_count--;
 241   if (_grab_count == 0) {
 242     XUngrabServer(_display);
 243     XFlush(_display); // ungrab as soon as possible
 244   }
 245 }
 246
 247
 248
 249
 250
 251
 252
 253 /*
 254  * Grabs a button, but also grabs the button in every possible combination
 255  * with the keyboard lock keys, so that they do not cancel out the event.
 256
 257  * if allow_scroll_lock is true then only the top half of the lock mask
 258  * table is used and scroll lock is ignored.  This value defaults to false.
 259  */
 260 void Display::grabButton(unsigned int button, unsigned int modifiers,
 261                          Window grab_window, bool owner_events,
 262                          unsigned int event_mask, int pointer_mode,
 263                          int keyboard_mode, Window confine_to,
 264                          Cursor cursor, bool allow_scroll_lock) const
 265 {
 266   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 267                                               8;
 268   for (size_t cnt = 0; cnt < length; ++cnt)
 269     XGrabButton(_display, button, modifiers | _mask_list[cnt],
 270                 grab_window, owner_events, event_mask, pointer_mode,
 271                 keyboard_mode, confine_to, cursor);
 272 }
 273
 274
 275 /*
 276  * Releases the grab on a button, and ungrabs all possible combinations of the
 277  * keyboard lock keys.
 278  */
 279 void Display::ungrabButton(unsigned int button, unsigned int modifiers,
 280                            Window grab_window) const
 281 {
 282   for (size_t cnt = 0; cnt < 8; ++cnt)
 283     XUngrabButton(_display, button, modifiers | _mask_list[cnt],
 284                   grab_window);
 285 }
 286
 287 void Display::grabKey(unsigned int keycode, unsigned int modifiers,
 288                         Window grab_window, bool owner_events,
 289                         int pointer_mode, int keyboard_mode,
 290                         bool allow_scroll_lock) const
 291 {
 292   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 293                                               8;
 294   for (size_t cnt = 0; cnt < length; ++cnt)
 295     XGrabKey(_display, keycode, modifiers | _mask_list[cnt],
 296                 grab_window, owner_events, pointer_mode, keyboard_mode);
 297 }
 298
 299 void Display::ungrabKey(unsigned int keycode, unsigned int modifiers,
 300                           Window grab_window) const
 301 {
 302   for (size_t cnt = 0; cnt < 8; ++cnt)
 303     XUngrabKey(_display, keycode, modifiers | _mask_list[cnt],
 304                grab_window);
 305 }
 306
 307 }