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package input
import (
"bytes"
"encoding/hex"
"strings"
)
// CapabilityEvent represents a Termcap/Terminfo response event. Termcap
// responses are generated by the terminal in response to RequestTermcap
// (XTGETTCAP) requests.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
type CapabilityEvent string
func parseTermcap(data []byte) CapabilityEvent {
// XTGETTCAP
if len(data) == 0 {
return CapabilityEvent("")
}
var tc strings.Builder
split := bytes.Split(data, []byte{';'})
for _, s := range split {
parts := bytes.SplitN(s, []byte{'='}, 2)
if len(parts) == 0 {
return CapabilityEvent("")
}
name, err := hex.DecodeString(string(parts[0]))
if err != nil || len(name) == 0 {
continue
}
var value []byte
if len(parts) > 1 {
value, err = hex.DecodeString(string(parts[1]))
if err != nil {
continue
}
}
if tc.Len() > 0 {
tc.WriteByte(';')
}
tc.WriteString(string(name))
if len(value) > 0 {
tc.WriteByte('=')
tc.WriteString(string(value))
}
}
return CapabilityEvent(tc.String())
}
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