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package tty
import (
"os"
"strings"
"unicode"
)
var linefeed = []byte{'\n'}
func Open() (*TTY, error) {
return open("/dev/tty")
}
func OpenDevice(path string) (*TTY, error) {
return open(path)
}
func (tty *TTY) Raw() (func() error, error) {
return tty.raw()
}
func (tty *TTY) MustRaw() func() error {
f, err := tty.raw()
if err != nil {
panic(err.Error())
}
return f
}
func (tty *TTY) Buffered() bool {
return tty.buffered()
}
func (tty *TTY) ReadRune() (rune, error) {
return tty.readRune()
}
func (tty *TTY) Close() error {
return tty.close()
}
func (tty *TTY) Size() (int, int, error) {
return tty.size()
}
func (tty *TTY) SizePixel() (int, int, int, int, error) {
return tty.sizePixel()
}
func (tty *TTY) Input() *os.File {
return tty.input()
}
func (tty *TTY) Output() *os.File {
return tty.output()
}
// Display types.
const (
displayNone = iota
displayRune
displayMask
)
func (tty *TTY) readString(displayType int) (string, error) {
rs := []rune{}
loop:
for {
r, err := tty.readRune()
if err != nil {
return "", err
}
switch r {
case 13:
break loop
case 8, 127:
if len(rs) > 0 {
rs = rs[:len(rs)-1]
if displayType != displayNone {
tty.Output().Write([]byte("\b \b"))
}
}
default:
if unicode.IsPrint(r) {
rs = append(rs, r)
switch displayType {
case displayRune:
tty.Output().Write([]byte(string(r)))
case displayMask:
tty.Output().Write([]byte{'*'})
}
}
}
}
return string(rs), nil
}
func (tty *TTY) ReadString() (string, error) {
defer tty.Output().Write(linefeed)
return tty.readString(displayRune)
}
func (tty *TTY) ReadPassword() (string, error) {
defer tty.Output().Write(linefeed)
return tty.readString(displayMask)
}
func (tty *TTY) ReadPasswordNoEcho() (string, error) {
defer tty.Output().Write(linefeed)
return tty.readString(displayNone)
}
func (tty *TTY) ReadPasswordClear() (string, error) {
s, err := tty.readString(displayMask)
tty.Output().Write([]byte(
strings.Repeat("\b", len(s)) +
strings.Repeat(" ", len(s)) +
strings.Repeat("\b", len(s))))
return s, err
}
type WINSIZE struct {
W int
H int
}
func (tty *TTY) SIGWINCH() <-chan WINSIZE {
return tty.sigwinch()
}
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