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

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   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 OBDisplay::ScreenInfoList OBDisplay::_screenInfoList;
  53 BGCCache *OBDisplay::_gccache = (BGCCache*) 0;
  54
  55
  56 int OBDisplay::xerrorHandler(Display *d, XErrorEvent *e)
  57 {
  58 #ifdef DEBUG
  59   char errtxt[128];
  60
  61   //if (e->error_code != BadWindow)
  62   {
  63     XGetErrorText(d, e->error_code, errtxt, 128);
  64     printf("X Error: %s\n", errtxt);
  65   }
  66 #else
  67   (void)d;
  68   (void)e;
  69 #endif
  70
  71   return false;
  72 }
  73
  74
  75 void OBDisplay::initialize(char *name)
  76 {
  77   int junk;
  78   (void)junk;
  79
  80   // Open the X display
  81   if (!(display = XOpenDisplay(name))) {
  82     printf(_("Unable to open connection to the X server. Please set the \n\
  83 DISPLAY environment variable approriately, or use the '-display' command \n\
  84 line argument.\n\n"));
  85     ::exit(1);
  86   }
  87   if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
  88     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
  89     ::exit(1);
  90   }
  91
  92   // set our error handler for X errors
  93   XSetErrorHandler(xerrorHandler);
  94
  95   // set the DISPLAY environment variable for any lauched children, to the
  96   // display we're using, so they open in the right place.
  97   // XXX rm -> std::string dtmp = "DISPLAY=" + DisplayString(display);
  98   if (putenv(const_cast<char*>((std::string("DISPLAY=") +
  99                                 DisplayString(display)).c_str()))) {
 100     printf(_("warning: couldn't set environment variable 'DISPLAY'\n"));
 101     perror("putenv()");
 102   }
 103
 104   // find the availability of X extensions we like to use
 105 #ifdef SHAPE
 106   _shape = XShapeQueryExtension(display, &_shape_event_basep, &junk);
 107 #endif
 108
 109 #ifdef XINERAMA
 110   _xinerama = XineramaQueryExtension(display, &_xinerama_event_basep, &junk);
 111 #endif // XINERAMA
 112
 113   // get lock masks that are defined by the display (not constant)
 114   XModifierKeymap *modmap;
 115   unsigned int NumLockMask = 0, ScrollLockMask = 0;
 116
 117   modmap = XGetModifierMapping(display);
 118   if (modmap && modmap->max_keypermod > 0) {
 119     const int mask_table[] = {
 120       ShiftMask, LockMask, ControlMask, Mod1Mask,
 121       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 122     };
 123     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 124       modmap->max_keypermod;
 125     // get the values of the keyboard lock modifiers
 126     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 127     // since it doesn't need to be.
 128     const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock);
 129     const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock);
 130
 131     for (size_t cnt = 0; cnt < size; ++cnt) {
 132       if (! modmap->modifiermap[cnt]) continue;
 133
 134       if (num_lock == modmap->modifiermap[cnt])
 135         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 136       if (scroll_lock == modmap->modifiermap[cnt])
 137         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 138     }
 139   }
 140
 141   if (modmap) XFreeModifiermap(modmap);
 142
 143   _mask_list[0] = 0;
 144   _mask_list[1] = LockMask;
 145   _mask_list[2] = NumLockMask;
 146   _mask_list[3] = LockMask | NumLockMask;
 147   _mask_list[4] = ScrollLockMask;
 148   _mask_list[5] = ScrollLockMask | LockMask;
 149   _mask_list[6] = ScrollLockMask | NumLockMask;
 150   _mask_list[7] = ScrollLockMask | LockMask | NumLockMask;
 151
 152   // Get information on all the screens which are available.
 153   _screenInfoList.reserve(ScreenCount(display));
 154   for (int i = 0; i < ScreenCount(display); ++i)
 155     _screenInfoList.push_back(ScreenInfo(i));
 156
 157   _gccache = new BGCCache(_screenInfoList.size());
 158 }
 159
 160
 161 void OBDisplay::destroy()
 162 {
 163   delete _gccache;
 164   XCloseDisplay(display);
 165 }
 166
 167
 168 const ScreenInfo* OBDisplay::screenInfo(int snum) {
 169   assert(snum >= 0);
 170   assert(snum < static_cast<int>(_screenInfoList.size()));
 171   return &_screenInfoList[snum];
 172 }
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182 /*
 183  * Grabs a button, but also grabs the button in every possible combination
 184  * with the keyboard lock keys, so that they do not cancel out the event.
 185
 186  * if allow_scroll_lock is true then only the top half of the lock mask
 187  * table is used and scroll lock is ignored.  This value defaults to false.
 188  */
 189 void OBDisplay::grabButton(unsigned int button, unsigned int modifiers,
 190                          Window grab_window, bool owner_events,
 191                          unsigned int event_mask, int pointer_mode,
 192                          int keyboard_mode, Window confine_to,
 193                          Cursor cursor, bool allow_scroll_lock) {
 194   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 195                                               8;
 196   for (size_t cnt = 0; cnt < length; ++cnt)
 197     XGrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt],
 198                 grab_window, owner_events, event_mask, pointer_mode,
 199                 keyboard_mode, confine_to, cursor);
 200 }
 201
 202
 203 /*
 204  * Releases the grab on a button, and ungrabs all possible combinations of the
 205  * keyboard lock keys.
 206  */
 207 void OBDisplay::ungrabButton(unsigned int button, unsigned int modifiers,
 208                            Window grab_window) {
 209   for (size_t cnt = 0; cnt < 8; ++cnt)
 210     XUngrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt],
 211                   grab_window);
 212 }
 213
 214
 215 }