protected override void Initialize()
{
_xkbContext = XkbCommon.xkb_context_new();
if (_xkbContext == null)
{
throw new OpenWindowException("Failed to create xkbcommon context.");
}
LogDebug("Connecting to display...");
_wlDisplay = WlDisplay.Connect();
if (_wlDisplay.IsNull)
{
var error = WaylandClient.wl_display_get_error(null);
throw new OpenWindowException($"Failed to connect to Wayland display ({error}).");
}
_wlDisplay.SetListener(DisplayErrorCallback, null);
LogDebug("Connected to display.");
WaylandBindings.Load();
XdgShellBindings.Load();
XdgDecorationUnstableV1Bindings.Load();
ViewporterBindings.Load();
_wlRegistry = _wlDisplay.GetRegistry();
if (_wlRegistry.IsNull)
{
throw new OpenWindowException("Failed to get Wayland registry.");
}
LogDebug("Got registry.");
_wlRegistry.SetListener(RegistryGlobalCallback, RegistryGlobalRemoveCallback);
LogDebug("Initiating first display roundtrip.");
_wlDisplay.Roundtrip();
LogDebug("Initiating second display roundtrip.");
_wlDisplay.Roundtrip();
if (_wlCompositor.IsNull)
{
throw new OpenWindowException("Server did not advertise a compositor.");
}
if (_xdgWmBase.IsNull)
{
if (_wlShellAvailable)
{
LogError("Server did not advertise xdg_wm_base, but it advertised a wl_shell. wl_shell is deprecated and not supported by OpenWindow.");
}
throw new OpenWindowException("Server did not advertise xdg_wm_base.");
}
}
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 UpdateKeymap()
{
for (var lsc = 0; lsc < WaylandKeyMaps.LinuxToOwScanCode.Length; lsc++)
{
var osc = WaylandKeyMaps.LinuxToOwScanCode[lsc];
if (osc == ScanCode.Unknown)
{
continue;
}
var sym = XkbCommon.xkb_state_key_get_one_sym(_xkbState, (uint)(lsc + 8));
var owk = WaylandKeyMaps.XkbToOwKey(sym);
if (owk == Key.Unknown)
{
continue;
}
_keyboardState.Set(osc, owk);
}
_keyboardState.Set(ScanCode.PrintScreen, Key.PrintScreen);
}