[Win32+SharpHook] Keyboard layout bugfix (#209)

Author: flyingpie

src/20-Services/Wtq.Services.SharpHook/NativeMethods.txt

@@ -1,6 +1,9 @@
+GetForegroundWindow
 GetKeyState
 GetKeyboardState
 GetKeyboardLayout
-ToUnicodeEx
+GetKeyboardLayoutNameW
+GetWindowThreadProcessId
 MapVirtualKey
+ToUnicodeEx
 VIRTUAL_KEY

src/20-Services/Wtq.Services.SharpHook/SharpHookHotkeyService.cs

@@ -83,6 +83,8 @@ protected override Task OnStartAsync(CancellationToken cancellationToken)
 			// Turn key code into sequence.
 			var keySeq = _keyService.GetKeySequence(keyCode, e.Data.RawCode);
 
+			_log.LogDebug("Got key sequence '{Sequence}'", keySeq);
+
 			// Look for a registered hotkey matching the one just pressed.
 			var hk = GetHotkeys().FirstOrDefault(h => h.Sequence == keySeq);
 			if (hk == null)

src/20-Services/Wtq.Services.SharpHook/Win32.cs

@@ -55,14 +55,7 @@ public bool IsSuperPressed() =>
 			wFlags: 0,
 			dwhkl: layout);
 
-		// The result of ToUnicodeEx should be greater than 0 if it succeeded.
-		if (length <= 0)
-		{
-			return null;
-		}
-
-		// Pull the relevant part out of the buffer (as specified by the returned "length").
-		var result = buffer[..length].ToString();
+		var result = buffer.ToString().Trim('\0').Trim();
 
 		// The result could still be empty, e.g. for the "Tab" character, which returns \t.
 		if (string.IsNullOrWhiteSpace(result))