dpc-tau-cli-picker 0.2.0

Synchronous single-select terminal list picker used by Tau CLIs.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

use std::io;

/// Raw-mode owner that can explicitly restore the terminal before drop.
pub(crate) trait RawModeCleanup {
    /// Restores cooked terminal mode.
    ///
    /// Implementations should keep their drop fallback armed when this returns
    /// an error so callers get a best-effort second cleanup attempt.
    fn restore_raw_mode(&mut self) -> io::Result<()>;
}

/// Guard that enables terminal raw mode on construction and restores
/// cooked mode on drop.
///
/// Callers must not construct this while a parent component already owns
/// raw mode — the drop will silently leave the parent in cooked mode.
pub(crate) struct RawModeGuard {
    active: bool,
}

impl RawModeGuard {
    /// Enables terminal raw mode and returns a guard that restores cooked mode.
    pub(crate) fn enable() -> io::Result<Self> {
        crossterm::terminal::enable_raw_mode()?;
        Ok(Self { active: true })
    }
}

impl RawModeCleanup for RawModeGuard {
    fn restore_raw_mode(&mut self) -> io::Result<()> {
        crossterm::terminal::disable_raw_mode()?;
        self.active = false;
        Ok(())
    }
}

impl Drop for RawModeGuard {
    fn drop(&mut self) {
        if self.active {
            let _ = crossterm::terminal::disable_raw_mode();
        }
    }
}