120 lines
3.0 KiB
Rust
120 lines
3.0 KiB
Rust
//! Raw mode.
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use std::io::{self, Write};
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use std::ops::{Deref, DerefMut};
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/// A terminal restorer, which keeps the previous state of the terminal, and restores it, when
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/// dropped.
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#[cfg(target_os = "redox")]
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pub struct RawTerminal<W: Write> {
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output: W,
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}
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#[cfg(target_os = "redox")]
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impl<W: Write> Drop for RawTerminal<W> {
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fn drop(&mut self) {
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use control::TermWrite;
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self.csi(b"R").unwrap();
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}
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}
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#[cfg(not(target_os = "redox"))]
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use termios::Termios;
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/// A terminal restorer, which keeps the previous state of the terminal, and restores it, when
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/// dropped.
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#[cfg(not(target_os = "redox"))]
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pub struct RawTerminal<W: Write> {
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prev_ios: Termios,
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output: W,
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}
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#[cfg(not(target_os = "redox"))]
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impl<W: Write> Drop for RawTerminal<W> {
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fn drop(&mut self) {
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use termios::set_terminal_attr;
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set_terminal_attr(&mut self.prev_ios as *mut _);
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}
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}
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impl<W: Write> Deref for RawTerminal<W> {
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type Target = W;
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fn deref(&self) -> &W {
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&self.output
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}
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}
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impl<W: Write> DerefMut for RawTerminal<W> {
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fn deref_mut(&mut self) -> &mut W {
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&mut self.output
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}
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}
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impl<W: Write> Write for RawTerminal<W> {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
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self.output.write(buf)
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}
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fn flush(&mut self) -> io::Result<()> {
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self.output.flush()
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}
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}
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/// Types which can be converted into "raw mode".
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pub trait IntoRawMode: Write + Sized {
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/// Switch to raw mode.
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///
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/// Raw mode means that stdin won't be printed (it will instead have to be written manually by the
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/// program). Furthermore, the input isn't canonicalised or buffered (that is, you can read from
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/// stdin one byte of a time). The output is neither modified in any way.
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fn into_raw_mode(self) -> io::Result<RawTerminal<Self>>;
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}
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impl<W: Write> IntoRawMode for W {
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#[cfg(not(target_os = "redox"))]
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fn into_raw_mode(self) -> io::Result<RawTerminal<W>> {
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use termios::{cfmakeraw, get_terminal_attr, set_terminal_attr};
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let (mut ios, exit) = get_terminal_attr();
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let prev_ios = ios.clone();
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if exit != 0 {
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return Err(io::Error::new(io::ErrorKind::Other, "Unable to get Termios attribute."));
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}
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unsafe {
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cfmakeraw(&mut ios);
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}
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if set_terminal_attr(&mut ios as *mut _) != 0 {
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Err(io::Error::new(io::ErrorKind::Other, "Unable to set Termios attribute."))
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} else {
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Ok(RawTerminal {
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prev_ios: prev_ios,
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output: self,
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})
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}
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}
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#[cfg(target_os = "redox")]
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fn into_raw_mode(mut self) -> io::Result<RawTerminal<W>> {
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use control::TermWrite;
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self.csi(b"r").map(|_| RawTerminal {
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output: self,
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})
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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use std::io::{Write, stdout};
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#[test]
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fn test_into_raw_mode() {
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let mut out = stdout().into_raw_mode().unwrap();
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out.write(b"this is a test, muahhahahah").unwrap();
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}
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}
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