66 lines
1.7 KiB
Rust
66 lines
1.7 KiB
Rust
use std::io::Stdout;
|
|
use std::mem::zeroed;
|
|
use std::os::fd::AsRawFd;
|
|
|
|
use libc::{ cfmakeraw, c_int, tcgetattr, tcsetattr, termios, TCSAFLUSH };
|
|
|
|
//https://viewsourcecode.org/snaptoken/kilo/02.enteringRawMode.html
|
|
//on TCSAFLUSH: "The TCSAFLUSH argument specifies when to apply the change: in this case, it waits for all pending output to be written to the terminal, and also discards any input that hasn't been read."
|
|
|
|
//https://www.man7.org/linux/man-pages/man3/termios.3.html
|
|
//(use cfmakeraw instead doing all those bitwise stuff manually)
|
|
|
|
//enter and exit tty raw mode
|
|
|
|
pub struct RawStdout {
|
|
pub stdout: Stdout,
|
|
old_termios: termios,
|
|
}
|
|
|
|
impl RawStdout {
|
|
pub fn new(stdout: Stdout) -> Self {
|
|
RawStdout {
|
|
stdout,
|
|
old_termios: unsafe { zeroed() },
|
|
}
|
|
}
|
|
|
|
pub fn get_termios(raw_fd: c_int) -> Result<termios, ()> {
|
|
let mut termios_struct: termios = unsafe { zeroed() };
|
|
let result = unsafe {
|
|
tcgetattr(raw_fd, &mut termios_struct)
|
|
};
|
|
if result != -1 {
|
|
Ok(termios_struct)
|
|
} else {
|
|
Err(())
|
|
}
|
|
}
|
|
|
|
pub fn enter_raw_mode(&mut self) -> Result<(), ()> {
|
|
let raw_fd = self.stdout.as_raw_fd();
|
|
let mut termios_struct = Self::get_termios(raw_fd)?;
|
|
self.old_termios = termios_struct;
|
|
let result = unsafe {
|
|
cfmakeraw(&mut termios_struct);
|
|
tcsetattr(raw_fd, TCSAFLUSH, &mut termios_struct)
|
|
};
|
|
if result != -1 {
|
|
Ok(())
|
|
} else {
|
|
Err(())
|
|
}
|
|
}
|
|
|
|
pub fn exit_raw_mode(&mut self) -> Result<(), ()> {
|
|
let result = unsafe {
|
|
tcsetattr(self.stdout.as_raw_fd(), TCSAFLUSH, &mut self.old_termios)
|
|
};
|
|
if result != -1 {
|
|
Ok(())
|
|
} else {
|
|
Err(())
|
|
}
|
|
}
|
|
}
|