// TODO(bep): check different OSs
func readTerm(done, read chan bool, wg *sync.WaitGroup) {
defer wg.Done()
t, _ := term.Open("/dev/tty")
defer t.Close()
defer t.Restore()
term.RawMode(t)
for {
select {
case <-done:
return
default:
b := make([]byte, 3)
i, err := t.Read(b)
if err != nil {
return
}
if i == 1 && b[0] == 3 {
// CTRL-C
done <- true
return
}
read <- true
}
}
}
// Returns either an ascii code, or (if input is an arrow) a Javascript key code.
func getChar() (ascii int, keyCode int, err error) {
t, _ := term.Open("/dev/tty")
term.RawMode(t)
bytes := make([]byte, 3)
var numRead int
numRead, err = t.Read(bytes)
if err != nil {
return
}
if numRead == 3 && bytes[0] == 27 && bytes[1] == 91 {
// Three-character control sequence, beginning with "ESC-[".
// Since there are no ASCII codes for arrow keys, we use
// Javascript key codes.
if bytes[2] == 65 {
// Up
keyCode = 38
} else if bytes[2] == 66 {
// Down
keyCode = 40
} else if bytes[2] == 67 {
// Right
keyCode = 39
} else if bytes[2] == 68 {
// Left
keyCode = 37
}
} else if numRead == 1 {
ascii = int(bytes[0])
} else {
// Two characters read??
}
if ascii == 3 {
fmt.Printf("BREAK")
t.Write([]byte("\r\n"))
}
term.CBreakMode(t)
t.Restore()
t.Close()
return
}
func RawMode(t *Term) error {
return term.RawMode(t.Term)
}