feat(input): add absolute pointer and scroll

gateway/transport.go

@@ -68,6 +68,7 @@ type ServerConfig struct {
 	TLSConfig              *tls.Config
 	QUICConfig             *quic.Config
 	GatewayID              string
+	Features               []string
 	Capabilities           protocol.CapabilityProfile
 	ProviderCapabilities   protocol.CapabilityProfile
 	Admission              Admission
@@ -866,6 +867,16 @@ func (s *gatewaySession) handleInput(payload []byte, sequence uint32) error {
 	if err != nil {
 		return err
 	}
+	requiredFeature := ""
+	switch event.Device {
+	case "mouse-absolute":
+		requiredFeature = "input.absolute.v1"
+	case "mouse-scroll":
+		requiredFeature = "input.scroll.v1"
+	}
+	if requiredFeature != "" && !slices.Contains(s.server.config.Features, requiredFeature) {
+		return ErrInputMalformed
+	}
 	event.Sequence = sequence
 	if err := s.provider.Input(s.ctx, event); err != nil {
 		s.server.metrics.InputRejected.Add(1)