mirror of https://github.com/Hilbis/Hilbish
78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
|
// Copyright 2011 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// +build darwin dragonfly freebsd linux,!appengine netbsd openbsd
|
||
|
|
|
||
|
|
package readline
|
||
|
|
|
||
|
|
import (
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
// State contains the state of a terminal.
|
||
|
|
type State struct {
|
||
|
|
termios unix.Termios
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsTerminal returns true if the given file descriptor is a terminal.
|
||
|
|
func IsTerminal(fd int) bool {
|
||
|
|
_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
|
||
|
|
return err == nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// MakeRaw put the terminal connected to the given file descriptor into raw
|
||
|
|
// mode and returns the previous state of the terminal so that it can be
|
||
|
|
// restored.
|
||
|
|
func MakeRaw(fd int) (*State, error) {
|
||
|
|
termios, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
oldState := State{termios: *termios}
|
||
|
|
|
||
|
|
// This attempts to replicate the behaviour documented for cfmakeraw in
|
||
|
|
// the termios(3) manpage.
|
||
|
|
termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
|
||
|
|
//termios.Oflag &^= unix.OPOST
|
||
|
|
//termios.Oflag &^= OXTABS
|
||
|
|
termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
|
||
|
|
termios.Cflag &^= unix.CSIZE | unix.PARENB
|
||
|
|
termios.Cflag |= unix.CS8
|
||
|
|
termios.Cc[unix.VMIN] = 1
|
||
|
|
termios.Cc[unix.VTIME] = 0
|
||
|
|
if err := unix.IoctlSetTermios(fd, ioctlWriteTermios, termios); err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return &oldState, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetState returns the current state of a terminal which may be useful to
|
||
|
|
// restore the terminal after a signal.
|
||
|
|
func GetState(fd int) (*State, error) {
|
||
|
|
termios, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return &State{termios: *termios}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Restore restores the terminal connected to the given file descriptor to a
|
||
|
|
// previous state.
|
||
|
|
func Restore(fd int, state *State) error {
|
||
|
|
return unix.IoctlSetTermios(fd, ioctlWriteTermios, &state.termios)
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetSize returns the dimensions of the given terminal.
|
||
|
|
func GetSize(fd int) (width, height int, err error) {
|
||
|
|
ws, err := unix.IoctlGetWinsize(fd, unix.TIOCGWINSZ)
|
||
|
|
if err != nil {
|
||
|
|
return -1, -1, err
|
||
|
|
}
|
||
|
|
return int(ws.Col), int(ws.Row), nil
|
||
|
|
}
|
||
|
|
|