96 lines
2.5 KiB
Rust
96 lines
2.5 KiB
Rust
use std::io::Write;
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use std::ops::{Deref, DerefMut};
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use TerminalError;
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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 TerminalRestorer<W> {
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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 TerminalRestorer<W> {
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fn drop(&mut self) {
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use TermControl;
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self.csi(b"R");
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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 TerminalRestorer<W> {
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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> Drop for TerminalRestorer<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> Deref for TerminalRestorer<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> DerefMut for TerminalRestorer<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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pub trait IntoRawMode: 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) -> Result<TerminalRestorer<Self>, TerminalError>;
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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) -> Result<TerminalRestorer<W>, TerminalError> {
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use termios::{cfmakeraw, get_terminal_attr, set_terminal_attr};
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let (mut ios, err) = get_terminal_attr();
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let prev_ios = ios.clone();
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if err != 0 {
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return Err(TerminalError::LoadAttrError);
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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(TerminalError::SetAttrError)
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} else {
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Ok(TerminalRestorer {
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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(self) -> Result<TerminalRestorer<W>, TerminalError> {
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if let Err(_) = self.csi("r") {
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Err(TerminalError::StdoutError)
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} else {
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Ok(TerminalRestorer {
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output: self,
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})
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}
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}
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}
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