func initKeyboardMapping() {
const (
keyLo = 8
keyHi = 255
)
km, err := xp.GetKeyboardMapping(xConn, keyLo, keyHi-keyLo+1).Reply()
if err != nil {
log.Fatal(err)
}
if km == nil {
log.Fatal("couldn't get keyboard mapping")
}
n := int(km.KeysymsPerKeycode)
if n < 2 {
log.Fatalf("too few keysyms per keycode: %d", n)
}
for i := keyLo; i <= keyHi; i++ {
keysyms[i][0] = km.Keysyms[(i-keyLo)*n+0]
keysyms[i][1] = km.Keysyms[(i-keyLo)*n+1]
}
toGrabs := []xp.Keysym{wmKeysym}
if doAudioActions {
toGrabs = append(toGrabs, xkAudioLowerVolume, xkAudioMute, xkAudioRaiseVolume)
}
for _, toGrab := range toGrabs {
keycode := xp.Keycode(0)
for i := keyLo; i <= keyHi; i++ {
if keysyms[i][0] == toGrab || keysyms[i][1] == toGrab {
keycode = xp.Keycode(i)
}
}
if keycode == 0 {
if toGrab != wmKeysym {
continue
}
log.Fatalf("could not find the window manager key %s", keysymString(toGrab))
}
if err := xp.GrabKeyChecked(xConn, false, rootXWin, xp.ModMaskAny, keycode,
xp.GrabModeAsync, xp.GrabModeAsync).Check(); err != nil {
log.Fatal(err)
}
}
// Disable Caps Lock if it is the wmKeysym.
if wmKeysym == xkCapsLock {
// On Ubuntu 12.04, disabling Caps Lock involved the equivalent of
// `xmodmap -e "clear lock"`. On Ubuntu 14.04, XKB has replaced xmodmap,
// possibly because this facilitates per-window keyboard layouts, so the
// equivalent of `xmodmap -e "clear lock"` doesn't work. As of October
// 2014, github.com/BurntSushi/xgb doesn't support XKB, so we exec the
// setxkbmap program instead of speaking the X11 protocol directly to
// disable Caps Lock.
if err := exec.Command("setxkbmap", "-option", "caps:none").Run(); err != nil {
log.Fatalf("setxkbmap failed: %v", err)
}
}
}
func NewKeyboard(s *xproto.SetupInfo, c *xgb.Conn) (*Keyboard, error) {
min, max := minMaxKeycodeGet(s)
keymap, err := xproto.GetKeyboardMapping(c, min, byte(max-min+1)).Reply()
if err != nil {
return nil, UnMappable("keyboard", err)
}
return &Keyboard{
Min: min,
Max: max,
GetKeyboardMappingReply: keymap,
}, nil
}
func (s *screenImpl) initKeyboardMapping() error {
const keyLo, keyHi = 8, 255
km, err := xproto.GetKeyboardMapping(s.xc, keyLo, keyHi-keyLo+1).Reply()
if err != nil {
return err
}
n := int(km.KeysymsPerKeycode)
if n < 2 {
return fmt.Errorf("x11driver: too few keysyms per keycode: %d", n)
}
for i := keyLo; i <= keyHi; i++ {
s.keysyms[i][0] = km.Keysyms[(i-keyLo)*n+0]
s.keysyms[i][1] = km.Keysyms[(i-keyLo)*n+1]
}
return nil
}
// A convenience function to grab the KeyboardMapping and ModifierMapping
// from X. We need to do this on startup (see Initialize) and whenever we
// get a MappingNotify event.
func MapsGet(xu *xgbutil.XUtil) (*xproto.GetKeyboardMappingReply,
*xproto.GetModifierMappingReply) {
min, max := minMaxKeycodeGet(xu)
newKeymap, keyErr := xproto.GetKeyboardMapping(xu.Conn(), min,
byte(max-min+1)).Reply()
newModmap, modErr := xproto.GetModifierMapping(xu.Conn()).Reply()
// If there are errors, we really need to panic. We just can't do
// any key binding without a mapping from the server.
if keyErr != nil {
panic(fmt.Sprintf("COULD NOT GET KEYBOARD MAPPING: %v\n"+
"THIS IS AN UNRECOVERABLE ERROR.\n",
keyErr))
}
if modErr != nil {
panic(fmt.Sprintf("COULD NOT GET MODIFIER MAPPING: %v\n"+
"THIS IS AN UNRECOVERABLE ERROR.\n",
keyErr))
}
return newKeymap, newModmap
}