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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "display.hh"
   6 #include "screeninfo.hh"
   7 #include "rendercontrol.hh"
   8 #include "util.hh"
   9
  10 extern "C" {
  11 #include <X11/keysym.h>
  12
  13 #ifdef    XKB
  14 #include <X11/XKBlib.h>
  15 #endif // XKB
  16
  17 #ifdef    SHAPE
  18 #include <X11/extensions/shape.h>
  19 #endif // SHAPE
  20
  21 #ifdef    XINERAMA
  22 #include <X11/extensions/Xinerama.h>
  23 #endif // XINERAMA
  24
  25 #ifdef    HAVE_SIGNAL_H
  26 #  include <signal.h>
  27 #endif // HAVE_SIGNAL_H
  28
  29 #ifdef    HAVE_FCNTL_H
  30 #  include <fcntl.h>
  31 #endif // HAVE_FCNTL_H
  32
  33 #ifdef    HAVE_UNISTD_H
  34 #  include <sys/types.h>
  35 #  include <unistd.h>
  36 #endif // HAVE_UNISTD_H
  37
  38 #include "../src/gettext.h"
  39 #define _(str) gettext(str)
  40 }
  41
  42 #include <cstdio>
  43
  44 namespace otk {
  45
  46
  47 Display *display = (Display*) 0;
  48
  49 static int xerrorHandler(::Display *d, XErrorEvent *e)
  50 {
  51   if (!display->ignoreErrors()) {
  52 #ifdef DEBUG
  53     char errtxt[128];
  54
  55     //if (e->error_code != BadWindow)
  56     {
  57       XGetErrorText(d, e->error_code, errtxt, 127);
  58       printf("X Error: %s\n", errtxt);
  59       if (e->error_code != BadWindow)
  60         abort();
  61     }
  62 #else
  63     (void)d;
  64     (void)e;
  65 #endif
  66   }
  67   return false;
  68 }
  69
  70
  71 Display::Display()
  72   : _display(0),
  73     _xkb(false),
  74     _xkb_event_basep(0),
  75     _shape(false),
  76     _shape_event_basep(0),
  77     _xinerama(false),
  78     _xinerama_event_basep(0),
  79     _mask_list(),
  80     _num_lock_mask(0),
  81     _scroll_lock_mask(0),
  82     _grab_count(0),
  83     _screeninfo_list(0),
  84     _rendercontrol_list(0)
  85 {
  86   int junk;
  87   (void)junk;
  88
  89   display = this;
  90
  91   // Open the X display
  92   if (!(_display = XOpenDisplay(NULL))) {
  93     printf(_("Unable to open connection to the X server. Please set the \n\
  94 DISPLAY environment variable approriately.\n\n"));
  95     ::exit(1);
  96   }
  97   if (fcntl(ConnectionNumber(_display), F_SETFD, 1) == -1) {
  98     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
  99     ::exit(1);
 100   }
 101   if (!XSupportsLocale())
 102     printf(_("X server does not support locale.\n"));
 103   if (!XSetLocaleModifiers(""))
 104     printf(_("Cannot set locale modifiers for the X server.\n"));
 105
 106   // set our error handler for X errors
 107   XSetErrorHandler(xerrorHandler);
 108
 109   // set the DISPLAY environment variable for any lauched children, to the
 110   // display we're using, so they open in the right place.
 111   putenv(std::string("DISPLAY=") + DisplayString(_display));
 112
 113   // find the availability of X extensions we like to use
 114 #ifdef XKB
 115   _xkb = XkbQueryExtension(_display, &junk, &_xkb_event_basep, &junk, NULL,
 116                            NULL);
 117 #endif
 118
 119 #ifdef SHAPE
 120   _shape = XShapeQueryExtension(_display, &_shape_event_basep, &junk);
 121 #endif
 122
 123 #ifdef XINERAMA
 124   _xinerama = XineramaQueryExtension(_display, &_xinerama_event_basep, &junk);
 125 #endif // XINERAMA
 126
 127   // get lock masks that are defined by the display (not constant)
 128   _modmap = XGetModifierMapping(_display);
 129   assert(_modmap);
 130   if (_modmap && _modmap->max_keypermod > 0) {
 131     const int mask_table[] = {
 132       ShiftMask, LockMask, ControlMask, Mod1Mask,
 133       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 134     };
 135     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 136       _modmap->max_keypermod;
 137     // get the values of the keyboard lock modifiers
 138     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 139     // since it doesn't need to be.
 140     const KeyCode num_lock = XKeysymToKeycode(_display, XK_Num_Lock);
 141     const KeyCode scroll_lock = XKeysymToKeycode(_display, XK_Scroll_Lock);
 142
 143     for (size_t cnt = 0; cnt < size; ++cnt) {
 144       if (! _modmap->modifiermap[cnt]) continue;
 145
 146       if (num_lock == _modmap->modifiermap[cnt])
 147         _num_lock_mask = mask_table[cnt / _modmap->max_keypermod];
 148       if (scroll_lock == _modmap->modifiermap[cnt])
 149         _scroll_lock_mask = mask_table[cnt / _modmap->max_keypermod];
 150     }
 151   }
 152
 153   _mask_list[0] = 0;
 154   _mask_list[1] = LockMask;
 155   _mask_list[2] = _num_lock_mask;
 156   _mask_list[3] = LockMask | _num_lock_mask;
 157   _mask_list[4] = _scroll_lock_mask;
 158   _mask_list[5] = _scroll_lock_mask | LockMask;
 159   _mask_list[6] = _scroll_lock_mask | _num_lock_mask;
 160   _mask_list[7] = _scroll_lock_mask | LockMask | _num_lock_mask;
 161
 162   // Get information on all the screens which are available, and create their
 163   // RenderControl
 164   _screeninfo_list = new ScreenInfo*[ScreenCount(_display)];
 165   _rendercontrol_list = new RenderControl*[ScreenCount(_display)];
 166   for (int i = 0; i < ScreenCount(_display); ++i) {
 167     _screeninfo_list[i] = new ScreenInfo(i);
 168     _rendercontrol_list[i] = RenderControl::createRenderControl(i);
 169   }
 170 }
 171
 172
 173 Display::~Display()
 174 {
 175   while (_grab_count > 0)
 176     ungrab();
 177
 178   XFreeModifiermap(_modmap);
 179
 180   for (int i = 0; i < ScreenCount(_display); ++i) {
 181     delete _rendercontrol_list[i];
 182     delete _screeninfo_list[i];
 183   }
 184   delete [] _rendercontrol_list;
 185   delete [] _screeninfo_list;
 186
 187   XCloseDisplay(_display);
 188 }
 189
 190
 191 const ScreenInfo* Display::screenInfo(int snum) const
 192 {
 193   assert(snum >= 0);
 194   assert(snum < (signed) ScreenCount(_display));
 195   return _screeninfo_list[snum];
 196 }
 197
 198
 199 const ScreenInfo* Display::findScreen(Window root) const
 200 {
 201   for (int i = 0; i < ScreenCount(_display); ++i)
 202     if (_screeninfo_list[i]->rootWindow() == root)
 203       return _screeninfo_list[i];
 204   return 0;
 205 }
 206
 207
 208 const RenderControl *Display::renderControl(int snum) const
 209 {
 210   assert(snum >= 0);
 211   assert(snum < (signed) ScreenCount(_display));
 212   return _rendercontrol_list[snum];
 213 }
 214
 215
 216 void Display::setIgnoreErrors(bool t)
 217 {
 218   // sync up so that anything already sent is/isn't ignored!
 219   XSync(_display, false);
 220   _ignore_errors = t;
 221 }
 222
 223 void Display::grab()
 224 {
 225   if (_grab_count == 0) {
 226     XGrabServer(_display);
 227     XSync(_display, false); // make sure it kicks in
 228   }
 229   _grab_count++;
 230 }
 231
 232
 233 void Display::ungrab()
 234 {
 235   if (_grab_count == 0) return;
 236   _grab_count--;
 237   if (_grab_count == 0) {
 238     XUngrabServer(_display);
 239     XFlush(_display); // ungrab as soon as possible
 240   }
 241 }
 242
 243
 244
 245
 246
 247
 248
 249 /*
 250  * Grabs a button, but also grabs the button in every possible combination
 251  * with the keyboard lock keys, so that they do not cancel out the event.
 252
 253  * if allow_scroll_lock is true then only the top half of the lock mask
 254  * table is used and scroll lock is ignored.  This value defaults to false.
 255  */
 256 void Display::grabButton(unsigned int button, unsigned int modifiers,
 257                          Window grab_window, bool owner_events,
 258                          unsigned int event_mask, int pointer_mode,
 259                          int keyboard_mode, Window confine_to,
 260                          Cursor cursor, bool allow_scroll_lock) const
 261 {
 262   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 263                                               8;
 264   for (size_t cnt = 0; cnt < length; ++cnt)
 265     XGrabButton(_display, button, modifiers | _mask_list[cnt],
 266                 grab_window, owner_events, event_mask, pointer_mode,
 267                 keyboard_mode, confine_to, cursor);
 268 }
 269
 270
 271 /*
 272  * Releases the grab on a button, and ungrabs all possible combinations of the
 273  * keyboard lock keys.
 274  */
 275 void Display::ungrabButton(unsigned int button, unsigned int modifiers,
 276                            Window grab_window) const
 277 {
 278   for (size_t cnt = 0; cnt < 8; ++cnt)
 279     XUngrabButton(_display, button, modifiers | _mask_list[cnt],
 280                   grab_window);
 281 }
 282
 283 void Display::grabKey(unsigned int keycode, unsigned int modifiers,
 284                         Window grab_window, bool owner_events,
 285                         int pointer_mode, int keyboard_mode,
 286                         bool allow_scroll_lock) const
 287 {
 288   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 289                                               8;
 290   for (size_t cnt = 0; cnt < length; ++cnt)
 291     XGrabKey(_display, keycode, modifiers | _mask_list[cnt],
 292                 grab_window, owner_events, pointer_mode, keyboard_mode);
 293 }
 294
 295 void Display::ungrabKey(unsigned int keycode, unsigned int modifiers,
 296                           Window grab_window) const
 297 {
 298   for (size_t cnt = 0; cnt < 8; ++cnt)
 299     XUngrabKey(_display, keycode, modifiers | _mask_list[cnt],
 300                grab_window);
 301 }
 302
 303 void Display::ungrabAllKeys(Window grab_window) const
 304 {
 305   XUngrabKey(_display, AnyKey, AnyModifier, grab_window);
 306 }
 307
 308 }