apps/konsole/src/XKB.cpp

   1 /*
   2  Originally comes from NumLockX http://dforce.sh.charactervut.characterz/~seli/en/numlockx
   3
   4  NumLockX
   5
   6  Copyright 2000-2001 Lubos Lunak        <l.lunak@kde.org>
   7  Copyright 2001      Oswald Buddenhagen <ossi@kde.org>
   8
   9 Permission is hereby granted, free of charge, to any person obtaining a
  10 copy of this software and associated documentation files (the "Software"),
  11 to deal in the Software without restriction, including without limitation
  12 the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13 and/or sell copies of the Software, and to permit persons to whom the
  14 Software is furnished to do so, subject to the following conditions:
  15
  16 The above copyright notice and this permission notice shall be included in
  17 all copies or substantial portions of the Software.
  18
  19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25 DEALINGS IN THE SOFTWARE.
  26
  27 ****************************************************************************/
  28
  29 #include <config-konsole.h>
  30
  31 #if defined(HAVE_XKB)
  32     #include <QtGui/QX11Info>
  33
  34
  35     #include <X11/Xlib.h>
  36
  37     #define explicit myexplicit
  38     #include <X11/XKBlib.h>
  39     #undef explicit
  40
  41     #include <X11/keysym.h>
  42
  43 /* the XKB stuff is based on code created by Oswald Buddenhagen <ossi@kde.org> */
  44 int xkb_init()
  45 {
  46     int xkb_opcode, xkb_event, xkb_error;
  47     int xkb_lmaj = XkbMajorVersion;
  48     int xkb_lmin = XkbMinorVersion;
  49     return XkbLibraryVersion( &xkb_lmaj, &xkb_lmin )
  50         && XkbQueryExtension( QX11Info::display(), &xkb_opcode, &xkb_event, &xkb_error,
  51                    &xkb_lmaj, &xkb_lmin );
  52 }
  53
  54 #if 0
  55 // This method doesn't work in all cases. The atom "ScrollLock" doesn't seem
  56 // to exist on all XFree versions (at least it's not here with my 3.3.6) - DF
  57 static unsigned int xkb_mask_modifier( XkbDescPtr xkb, const char *name )
  58 {
  59     int i;
  60     if( !xkb || !xkb->names )
  61     return 0;
  62
  63     Atom atom = XInternAtom( xkb->dpy, name, true );
  64     if (atom == None)
  65         return 0;
  66
  67     for( i = 0;
  68          i < XkbNumVirtualMods;
  69      i++ )
  70     {
  71     if (atom == xkb->names->vmods[i] )
  72     {
  73         unsigned int mask;
  74         XkbVirtualModsToReal( xkb, 1 << i, &mask );
  75         return mask;
  76     }
  77     }
  78     return 0;
  79 }
  80
  81 static unsigned int xkb_scrolllock_mask()
  82 {
  83     XkbDescPtr xkb;
  84     if(( xkb = XkbGetKeyboard( QX11Info::display(), XkbAllComponentsMask, XkbUseCoreKbd )) != NULL )
  85     {
  86         unsigned int mask = xkb_mask_modifier( xkb, "ScrollLock" );
  87         XkbFreeKeyboard( xkb, 0, True );
  88         return mask;
  89     }
  90     return 0;
  91 }
  92
  93 #else
  94 unsigned int xkb_scrolllock_mask()
  95 {
  96     int scrolllock_mask = 0;
  97     XModifierKeymap* map = XGetModifierMapping( QX11Info::display() );
  98     KeyCode scrolllock_keycode = XKeysymToKeycode( QX11Info::display(), XK_Scroll_Lock );
  99     if( scrolllock_keycode == NoSymbol ) {
 100         XFreeModifiermap(map);
 101         return 0;
 102     }
 103     for( int i = 0;
 104          i < 8;
 105          ++i )
 106         {
 107        if( map->modifiermap[ map->max_keypermod * i ] == scrolllock_keycode )
 108                scrolllock_mask += 1 << i;
 109        }
 110
 111     XFreeModifiermap(map);
 112     return scrolllock_mask;
 113 }
 114 #endif
 115
 116
 117 unsigned int scrolllock_mask = 0;
 118
 119 int xkb_set_on()
 120 {
 121     if (!scrolllock_mask)
 122     {
 123        if( !xkb_init())
 124           return 0;
 125        scrolllock_mask = xkb_scrolllock_mask();
 126        if( scrolllock_mask == 0 )
 127           return 0;
 128     }
 129     XkbLockModifiers ( QX11Info::display(), XkbUseCoreKbd, scrolllock_mask, scrolllock_mask);
 130     return 1;
 131 }
 132
 133 int xkb_set_off()
 134 {
 135     if (!scrolllock_mask)
 136     {
 137        if( !xkb_init())
 138           return 0;
 139        scrolllock_mask = xkb_scrolllock_mask();
 140        if( scrolllock_mask == 0 )
 141           return 0;
 142     }
 143     XkbLockModifiers ( QX11Info::display(), XkbUseCoreKbd, scrolllock_mask, 0);
 144     return 1;
 145 }
 146
 147 void scrolllock_set_on()
 148 {
 149     xkb_set_on();
 150 }
 151
 152 void scrolllock_set_off()
 153 {
 154     xkb_set_off();
 155 }
 156
 157 #endif // defined(HAVE_XKB)
 158