mirror of
https://github.com/gdamore/tcell.git
synced 2025-04-26 13:48:53 +08:00
134 lines
2.9 KiB
Go
134 lines
2.9 KiB
Go
// +build !windows,!nacl,!plan9
|
|
|
|
// Copyright 2015 The TCell Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use file except in compliance with the License.
|
|
// You may obtain a copy of the license at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package tcell
|
|
|
|
import (
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
)
|
|
|
|
// #include <termios.h>
|
|
// #include <sys/ioctl.h>
|
|
//
|
|
// int getwinsize(int fd, int *cols, int *rows) {
|
|
// #if defined TIOCGWINSZ
|
|
// struct winsize w;
|
|
// if (ioctl(fd, TIOCGWINSZ, &w) < 0) {
|
|
// return (-1);
|
|
// }
|
|
// *cols = w.ws_col;
|
|
// *rows = w.ws_row;
|
|
// return (0);
|
|
// #else
|
|
// return (-1);
|
|
// #endif
|
|
// }
|
|
import "C"
|
|
|
|
var savedtios map[*tScreen]*C.struct_termios
|
|
|
|
func init() {
|
|
savedtios = make(map[*tScreen]*C.struct_termios)
|
|
}
|
|
|
|
func (t *tScreen) termioInit() error {
|
|
var e error
|
|
var rv C.int
|
|
var oldtios C.struct_termios
|
|
var newtios C.struct_termios
|
|
var fd C.int
|
|
|
|
if t.in, e = os.OpenFile("/dev/tty", os.O_RDONLY, 0); e != nil {
|
|
goto failed
|
|
}
|
|
if t.out, e = os.OpenFile("/dev/tty", os.O_WRONLY, 0); e != nil {
|
|
goto failed
|
|
}
|
|
|
|
fd = C.int(t.out.Fd())
|
|
if rv, e = C.tcgetattr(fd, &oldtios); rv != 0 {
|
|
goto failed
|
|
}
|
|
newtios = oldtios
|
|
newtios.c_iflag &^= C.IGNBRK | C.BRKINT | C.PARMRK |
|
|
C.ISTRIP | C.INLCR | C.IGNCR |
|
|
C.ICRNL | C.IXON
|
|
newtios.c_oflag &^= C.OPOST
|
|
newtios.c_lflag &^= C.ECHO | C.ECHONL | C.ICANON |
|
|
C.ISIG | C.IEXTEN
|
|
newtios.c_cflag &^= C.CSIZE | C.PARENB
|
|
newtios.c_cflag |= C.CS8
|
|
|
|
// We wake up at the earliest of 100 msec or when data is received.
|
|
// We need to wake up frequently to permit us to exit cleanly and
|
|
// close file descriptors on systems like Darwin, where close does
|
|
// cause a wakeup. (Probably we could reasonably increase this to
|
|
// something like 1 sec or 500 msec.)
|
|
newtios.c_cc[C.VMIN] = 0
|
|
newtios.c_cc[C.VTIME] = 1
|
|
|
|
if rv, e = C.tcsetattr(fd, C.TCSANOW|C.TCSAFLUSH, &newtios); rv != 0 {
|
|
goto failed
|
|
}
|
|
|
|
savedtios[t] = &oldtios
|
|
signal.Notify(t.sigwinch, syscall.SIGWINCH)
|
|
|
|
if w, h, e := t.getWinSize(); e == nil && w != 0 && h != 0 {
|
|
t.w = w
|
|
t.h = h
|
|
}
|
|
|
|
return nil
|
|
|
|
failed:
|
|
if t.in != nil {
|
|
t.in.Close()
|
|
}
|
|
if t.out != nil {
|
|
t.out.Close()
|
|
}
|
|
return e
|
|
}
|
|
|
|
func (t *tScreen) termioFini() {
|
|
|
|
signal.Stop(t.sigwinch)
|
|
|
|
if t.out != nil {
|
|
if oldtios, ok := savedtios[t]; ok {
|
|
fd := C.int(t.out.Fd())
|
|
C.tcsetattr(fd, C.TCSANOW, oldtios)
|
|
delete(savedtios, t)
|
|
}
|
|
t.out.Close()
|
|
}
|
|
if t.in != nil {
|
|
t.in.Close()
|
|
}
|
|
}
|
|
|
|
func (t *tScreen) getWinSize() (int, int, error) {
|
|
var cx, cy C.int
|
|
if r, e := C.getwinsize(C.int(t.out.Fd()), &cx, &cy); r == 0 {
|
|
return int(cx), int(cy), nil
|
|
} else {
|
|
return 0, 0, e
|
|
}
|
|
}
|