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 *OBDisplay::display = (Display*) 0;
  43 bool OBDisplay::_shape = false;
  44 int  OBDisplay::_shape_event_basep = 0;
  45 bool OBDisplay::_xinerama = false;
  46 int  OBDisplay::_xinerama_event_basep = 0;
  47 unsigned int OBDisplay::_mask_list[8];
  48 OBDisplay::ScreenInfoList OBDisplay::_screenInfoList;
  49 BGCCache *OBDisplay::_gccache = (BGCCache*) 0;
  50
  51
  52 int OBDisplay::xerrorHandler(Display *d, XErrorEvent *e)
  53 {
  54 #ifdef DEBUG
  55   char errtxt[128];
  56
  57   if (e->error_code != BadWindow) {
  58     XGetErrorText(d, e->error_code, errtxt, 128);
  59     printf("X Error: %s\n", errtxt);
  60   }
  61 #else
  62   (void)d;
  63   (void)e;
  64 #endif
  65
  66   return false;
  67 }
  68
  69
  70 void OBDisplay::initialize(char *name)
  71 {
  72   int junk;
  73   (void)junk;
  74
  75   // Open the X display
  76   if (!(display = XOpenDisplay(name))) {
  77     printf(_("Unable to open connection to the X server. Please set the \n\
  78 DISPLAY environment variable approriately, or use the '-display' command \n\
  79 line argument.\n\n"));
  80     ::exit(1);
  81   }
  82   if (fcntl(ConnectionNumber(display), F_SETFD, 1) == -1) {
  83     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
  84     ::exit(1);
  85   }
  86
  87   // set our error handler for X errors
  88   XSetErrorHandler(xerrorHandler);
  89
  90   // set the DISPLAY environment variable for any lauched children, to the
  91   // display we're using, so they open in the right place.
  92   // XXX rm -> std::string dtmp = "DISPLAY=" + DisplayString(display);
  93   if (putenv(const_cast<char*>((std::string("DISPLAY=") +
  94                                 DisplayString(display)).c_str()))) {
  95     printf(_("warning: couldn't set environment variable 'DISPLAY'\n"));
  96     perror("putenv()");
  97   }
  98
  99   // find the availability of X extensions we like to use
 100 #ifdef SHAPE
 101   _shape = XShapeQueryExtension(display, &_shape_event_basep, &junk);
 102 #endif
 103
 104 #ifdef XINERAMA
 105   _xinerama = XineramaQueryExtension(display, &_xinerama_event_basep, &junk);
 106 #endif // XINERAMA
 107
 108   // get lock masks that are defined by the display (not constant)
 109   XModifierKeymap *modmap;
 110   unsigned int NumLockMask = 0, ScrollLockMask = 0;
 111
 112   modmap = XGetModifierMapping(display);
 113   if (modmap && modmap->max_keypermod > 0) {
 114     const int mask_table[] = {
 115       ShiftMask, LockMask, ControlMask, Mod1Mask,
 116       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 117     };
 118     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
 119       modmap->max_keypermod;
 120     // get the values of the keyboard lock modifiers
 121     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
 122     // since it doesn't need to be.
 123     const KeyCode num_lock = XKeysymToKeycode(display, XK_Num_Lock);
 124     const KeyCode scroll_lock = XKeysymToKeycode(display, XK_Scroll_Lock);
 125
 126     for (size_t cnt = 0; cnt < size; ++cnt) {
 127       if (! modmap->modifiermap[cnt]) continue;
 128
 129       if (num_lock == modmap->modifiermap[cnt])
 130         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 131       if (scroll_lock == modmap->modifiermap[cnt])
 132         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 133     }
 134   }
 135
 136   if (modmap) XFreeModifiermap(modmap);
 137
 138   _mask_list[0] = 0;
 139   _mask_list[1] = LockMask;
 140   _mask_list[2] = NumLockMask;
 141   _mask_list[3] = LockMask | NumLockMask;
 142   _mask_list[4] = ScrollLockMask;
 143   _mask_list[5] = ScrollLockMask | LockMask;
 144   _mask_list[6] = ScrollLockMask | NumLockMask;
 145   _mask_list[7] = ScrollLockMask | LockMask | NumLockMask;
 146
 147   // Get information on all the screens which are available.
 148   _screenInfoList.reserve(ScreenCount(display));
 149   for (int i = 0; i < ScreenCount(display); ++i)
 150     _screenInfoList.push_back(ScreenInfo(i));
 151
 152   _gccache = new BGCCache(_screenInfoList.size());
 153 }
 154
 155
 156 void OBDisplay::destroy()
 157 {
 158   delete _gccache;
 159   XCloseDisplay(display);
 160 }
 161
 162
 163 const ScreenInfo* OBDisplay::screenInfo(int snum) {
 164   assert(snum >= 0);
 165   assert(snum < static_cast<int>(_screenInfoList.size()));
 166   return &_screenInfoList[snum];
 167 }
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177 /*
 178  * Grabs a button, but also grabs the button in every possible combination
 179  * with the keyboard lock keys, so that they do not cancel out the event.
 180
 181  * if allow_scroll_lock is true then only the top half of the lock mask
 182  * table is used and scroll lock is ignored.  This value defaults to false.
 183  */
 184 void OBDisplay::grabButton(unsigned int button, unsigned int modifiers,
 185                          Window grab_window, bool owner_events,
 186                          unsigned int event_mask, int pointer_mode,
 187                          int keyboard_mode, Window confine_to,
 188                          Cursor cursor, bool allow_scroll_lock) {
 189   unsigned int length = (allow_scroll_lock) ? 8 / 2:
 190                                               8;
 191   for (size_t cnt = 0; cnt < length; ++cnt)
 192     XGrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt],
 193                 grab_window, owner_events, event_mask, pointer_mode,
 194                 keyboard_mode, confine_to, cursor);
 195 }
 196
 197
 198 /*
 199  * Releases the grab on a button, and ungrabs all possible combinations of the
 200  * keyboard lock keys.
 201  */
 202 void OBDisplay::ungrabButton(unsigned int button, unsigned int modifiers,
 203                            Window grab_window) {
 204   for (size_t cnt = 0; cnt < 8; ++cnt)
 205     XUngrabButton(otk::OBDisplay::display, button, modifiers | _mask_list[cnt],
 206                   grab_window);
 207 }
 208
 209
 210 }