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