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    HAVE_STDIO_H
  15 #  include <stdio.h>
  16 #endif // HAVE_STDIO_H
  17
  18 #ifdef    HAVE_STDLIB_H
  19 #  include <stdlib.h>
  20 #endif // HAVE_STDLIB_H
  21
  22 #ifdef    HAVE_SIGNAL_H
  23 #  include <signal.h>
  24 #endif // HAVE_SIGNAL_H
  25
  26 #ifdef    HAVE_FCNTL_H
  27 #  include <fcntl.h>
  28 #endif // HAVE_FCNTL_H
  29
  30 #ifdef    HAVE_UNISTD_H
  31 #  include <sys/types.h>
  32 #  include <unistd.h>
  33 #endif // HAVE_UNISTD_H
  34
  35 #include "gettext.h"
  36 #define _(str) gettext(str)
  37 }
  38
  39 namespace otk {
  40
  41
  42 Display *display = (Display*) 0;
  43
  44
  45 int OBDisplay::xerrorHandler(Display *d, XErrorEvent *e)
  46 {
  47 #ifdef DEBUG
  48   char errtxt[128];
  49
  50   XGetErrorText(d, e->error_code, errtxt, 128);
  51   printf("X Error: %s\n", errtxt);
  52 #else
  53   (void)d;
  54   (void)e;
  55 #endif
  56
  57   return false;
  58 }
  59
  60
  61 void OBDisplay::initialize(char *name)
  62 {
  63   int junk;
  64   (void)junk;
  65
  66   // Open the X display
  67   if (!(display = XOpenDisplay(name))) {
  68     printf(_("Unable to open connection to the X server. Please set the \n\
  69 DISPLAY environment variable approriately, or use the '-display' command \n\
  70 line argument.\n\n"));
  71     ::exit(1);
  72   }
  73   if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
  74     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
  75     ::exit(1);
  76   }
  77
  78   // set our error handler for X errors
  79   XSetErrorHandler(xerrorHandler);
  80
  81   // set the DISPLAY environment variable for any lauched children, to the
  82   // display we're using, so they open in the right place.
  83   // XXX rm -> std::string dtmp = "DISPLAY=" + DisplayString(display);
  84   if (putenv(const_cast<char*>((std::string("DISPLAY=") +
  85                                 DisplayString(display)).c_str()))) {
  86     printf(_("warning: couldn't set environment variable 'DISPLAY'\n"));
  87     perror("putenv()");
  88   }
  89
  90   // find the availability of X extensions we like to use
  91 #ifdef SHAPE
  92   _shape = XShapeQueryExtension(display, &_shape_event_basep, &junk);
  93 #else
  94   _shape = false;
  95 #endif
  96
  97 #ifdef XINERAMA
  98   _xinerama = XineramaQueryExtension(display, &_xinerama_event_basep, &junk);
  99 #else
 100   _xinerama = false;
 101 #endif // XINERAMA
 102
 103   // get lock masks that are defined by the display (not constant)
 104   XModifierKeymap *modmap;
 105   unsigned int NumLockMask = 0, ScrollLockMask = 0;
 106
 107   modmap = XGetModifierMapping(display);
 108   if (modmap && modmap->max_keypermod > 0) {
 109     const int mask_table[] = {
 110       ShiftMask, LockMask, ControlMask, Mod1Mask,
 111       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 112     };
 113     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 114       modmap->max_keypermod;
 115     // get the values of the keyboard lock modifiers
 116     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 117     // since it doesn't need to be.
 118     const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock);
 119     const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock);
 120
 121     for (size_t cnt = 0; cnt < size; ++cnt) {
 122       if (! modmap->modifiermap[cnt]) continue;
 123
 124       if (num_lock == modmap->modifiermap[cnt])
 125         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 126       if (scroll_lock == modmap->modifiermap[cnt])
 127         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 128     }
 129   }
 130
 131   if (modmap) XFreeModifiermap(modmap);
 132
 133   _mask_list[0] = 0;
 134   _mask_list[1] = LockMask;
 135   _mask_list[2] = NumLockMask;
 136   _mask_list[3] = LockMask | NumLockMask;
 137   _mask_list[4] = ScrollLockMask;
 138   _mask_list[5] = ScrollLockMask | LockMask;
 139   _mask_list[6] = ScrollLockMask | NumLockMask;
 140   _mask_list[7] = ScrollLockMask | LockMask | NumLockMask;
 141
 142   // Get information on all the screens which are available.
 143   _screenInfoList.reserve(ScreenCount(display));
 144   for (int i = 0; i < ScreenCount(display); ++i)
 145     _screenInfoList.push_back(ScreenInfo(i));
 146
 147   _gccache = new BGCCache(_screenInfoList.size());
 148 }
 149
 150
 151 void OBDisplay::destroy()
 152 {
 153   delete _gccache;
 154   XCloseDisplay(display);
 155 }
 156
 157
 158 }