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