public X11Keyboard()
{
Debug.WriteLine("Using X11Keyboard.");
state.IsConnected = true;
var display = API.DefaultDisplay;
using (new XLock(display))
{
// Find the number of keysyms per keycode.
int first = 0, last = 0;
API.DisplayKeycodes(display, ref first, ref last);
var keysym_ptr =
API.GetKeyboardMapping(display,
(byte)first,
last - first + 1,
ref KeysymsPerKeycode);
Functions.XFree(keysym_ptr);
if (Xkb.IsSupported(display))
{
// Request that auto-repeat is only set on devices that support it physically.
// This typically means that it's turned off for keyboards what we want).
// We prefer this method over XAutoRepeatOff/On, because the latter needs to
// be reset before the program exits.
bool supported;
Xkb.SetDetectableAutoRepeat(display, true, out supported);
KeyMap = new X11KeyMap(display);
}
}
}
internal X11KeyMap(IntPtr display)
{
xkb_supported = Xkb.IsSupported(display);
if (xkb_supported)
{
RefreshKeycodes(display);
}
}
bool TranslateKeyXkb(IntPtr display, int keycode, out Key key)
{
if (keycode < 8 || keycode > 255)
{
key = Key.Unknown;
return(false);
}
// Translate the numeric keypad using the secondary group
// (equivalent to NumLock = on)
XKey keysym = Xkb.KeycodeToKeysym(display, keycode, 0, 1);
switch (keysym)
{
case XKey.KP_0: key = Key.Keypad0; return(true);
case XKey.KP_1: key = Key.Keypad1; return(true);
case XKey.KP_2: key = Key.Keypad2; return(true);
case XKey.KP_3: key = Key.Keypad3; return(true);
case XKey.KP_4: key = Key.Keypad4; return(true);
case XKey.KP_5: key = Key.Keypad5; return(true);
case XKey.KP_6: key = Key.Keypad6; return(true);
case XKey.KP_7: key = Key.Keypad7; return(true);
case XKey.KP_8: key = Key.Keypad8; return(true);
case XKey.KP_9: key = Key.Keypad9; return(true);
case XKey.KP_Separator:
case XKey.KP_Decimal: key = Key.KeypadDecimal; return(true);
case XKey.KP_Equal: key = Key.Unknown; return(false); // Todo: fixme
case XKey.KP_Enter: key = Key.KeypadEnter; return(true);
}
// Translate non-alphanumeric keys using the primary group
keysym = Xkb.KeycodeToKeysym(display, keycode, 0, 0);
key = TranslateXKey(keysym);
return(key != Key.Unknown);
}
// Refreshes the keycodes lookup table based
// on the current keyboard layout.
internal void RefreshKeycodes(IntPtr display)
{
// Approach inspired by GLFW: http://www.glfw.org/
// Huge props to the GLFW team!
if (xkb_supported)
{
unsafe
{
// Xkb.GetKeyboard appears to be broken (multiple bug reports across distros)
// so use Xkb.AllocKeyboard with Xkb.GetNames instead.
XkbDesc *keyboard = Xkb.AllocKeyboard(display);
if (keyboard != null)
{
Xkb.GetNames(display, XkbNamesMask.All, keyboard);
for (int i = 0; i < keycodes.Length; i++)
{
keycodes[i] = Key.Unknown;
}
// Map all alphanumeric keys of this layout
// Symbols are handled in GetKey() instead.
for (int i = keyboard->min_key_code; i <= keyboard->max_key_code; ++i)
{
string name = new string((sbyte *)keyboard->names->keys[i].name, 0, Xkb.KeyNameLength);
Key key = Key.Unknown;
switch (name)
{
case "TLDE":
key = Key.Tilde;
break;
case "AE01":
key = Key.Number1;
break;
case "AE02":
key = Key.Number2;
break;
case "AE03":
key = Key.Number3;
break;
case "AE04":
key = Key.Number4;
break;
case "AE05":
key = Key.Number5;
break;
case "AE06":
key = Key.Number6;
break;
case "AE07":
key = Key.Number7;
break;
case "AE08":
key = Key.Number8;
break;
case "AE09":
key = Key.Number9;
break;
case "AE10":
key = Key.Number0;
break;
case "AE11":
key = Key.Minus;
break;
case "AE12":
key = Key.Plus;
break;
case "AD01":
key = Key.Q;
break;
case "AD02":
key = Key.W;
break;
case "AD03":
key = Key.E;
break;
case "AD04":
key = Key.R;
break;
case "AD05":
key = Key.T;
break;
case "AD06":
key = Key.Y;
break;
case "AD07":
key = Key.U;
break;
case "AD08":
key = Key.I;
break;
case "AD09":
key = Key.O;
break;
case "AD10":
key = Key.P;
break;
case "AD11":
key = Key.BracketLeft;
break;
case "AD12":
key = Key.BracketRight;
break;
case "AC01":
key = Key.A;
break;
case "AC02":
key = Key.S;
break;
case "AC03":
key = Key.D;
break;
case "AC04":
key = Key.F;
break;
case "AC05":
key = Key.G;
break;
case "AC06":
key = Key.H;
break;
case "AC07":
key = Key.J;
break;
case "AC08":
key = Key.K;
break;
case "AC09":
key = Key.L;
break;
case "AC10":
key = Key.Semicolon;
break;
case "AC11":
key = Key.Quote;
break;
case "AB01":
key = Key.Z;
break;
case "AB02":
key = Key.X;
break;
case "AB03":
key = Key.C;
break;
case "AB04":
key = Key.V;
break;
case "AB05":
key = Key.B;
break;
case "AB06":
key = Key.N;
break;
case "AB07":
key = Key.M;
break;
case "AB08":
key = Key.Comma;
break;
case "AB09":
key = Key.Period;
break;
case "AB10":
key = Key.Slash;
break;
case "BKSL":
key = Key.BackSlash;
break;
case "LSGT":
key = Key.Unknown;
break;
default:
key = Key.Unknown;
break;
}
keycodes[i] = key;
}
Xkb.FreeKeyboard(keyboard, 0, true);
}
}
}
// Translate unknown keys (and symbols) using
// regular layout-dependent GetKey()
for (int i = 0; i < 256; i++)
{
if (keycodes[i] == Key.Unknown)
{
// TranslateKeyCode expects a XKeyEvent structure
// Make one up
XKeyEvent e = new XKeyEvent();
e.display = display;
e.keycode = i;
Key key = Key.Unknown;
if (TranslateKeyEvent(ref e, out key))
{
keycodes[i] = key;
}
}
}
}
