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