private void KeymapCallback(void *data, wl_keyboard *proxy, wl_keyboard_keymap_format format, int fd, uint size)
{
if (format != wl_keyboard_keymap_format.XkbV1)
{
Libc.close(fd);
throw new NotImplementedException("Only xkbcommon compatible keymaps are currently supported.");
}
var kbdStr = Libc.mmap(null, size, Libc.PROT_READ, Libc.MAP_PRIVATE, fd, 0);
if (kbdStr == null)
{
Libc.close(fd);
return;
}
var newKeymap = XkbCommon.xkb_keymap_new_from_string(_xkbContext, kbdStr, XkbCommon.XKB_KEYMAP_FORMAT_TEXT_V1);
Libc.munmap(kbdStr, size);
Libc.close(fd);
if (newKeymap == null)
{
throw new OpenWindowException("Failed to create xkb keymap.");
}
var newState = XkbCommon.xkb_state_new(newKeymap);
if (newState == null)
{
XkbCommon.xkb_keymap_unref(newKeymap);
throw new OpenWindowException("Failed to create xkb state.");
}
if (_xkbKeymap != null)
{
XkbCommon.xkb_keymap_unref(_xkbKeymap);
}
if (_xkbState != null)
{
XkbCommon.xkb_state_unref(_xkbState);
}
_xkbKeymap = newKeymap;
_xkbState = newState;
UpdateKeymap();
}
private void KeyboardKeyCallback(void *data, wl_keyboard *proxy, uint serial, uint time, uint lsc, wl_keyboard_key_state state)
{
if (lsc >= WaylandKeyMaps.LinuxToOwScanCode.Length)
{
return;
}
var osc = WaylandKeyMaps.LinuxToOwScanCode[lsc];
SetKey(osc, state == wl_keyboard_key_state.Pressed);
if (state == wl_keyboard_key_state.Released)
{
return;
}
// this returns zero if the key press generates more than 1 character in UTF32
var utf32 = XkbCommon.xkb_state_key_get_utf32(_xkbState, lsc + 8);
if (utf32 != 0)
{
SendCharacter(utf32);
}
else
{
var strBufSize = XkbCommon.xkb_state_key_get_utf8(_xkbState, lsc + 8, null, 0);
if (strBufSize == 0)
{
return;
}
byte *strBuf = stackalloc byte[strBufSize];
XkbCommon.xkb_state_key_get_utf8(_xkbState, lsc + 8, strBuf, strBufSize);
// We send text in UTF-32 i.e. no more than 32 bits at a time
var offset = 0;
while (ReadUtf32FromUtf8(strBuf, ref offset, out utf32))
{
SendCharacter(utf32);
}
}
}
private void KeyboardLeaveCallback(void *data, wl_keyboard *proxy, uint serial, wl_surface *surface) => WlSetFocus(surface, false);
private void KeyboardEnterCallback(void *data, wl_keyboard *proxy, uint serial, wl_surface *surface, wl_array *keys) => WlSetFocus(surface, true);
