termesh 0.1.3

Terminal-native, agent-first IDE.
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//! Terminal lifecycle: alternate screen + raw mode, with a panic hook that restores
//! the terminal before unwinding so a crash never leaves the user's shell wedged.
use crossterm::execute;
use crossterm::terminal::{
    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
};
use ratatui::backend::CrosstermBackend;
use ratatui::Terminal;
use std::io::{self, stdout, Stdout};

pub struct Tui {
    pub terminal: Terminal<CrosstermBackend<Stdout>>,
}

impl Tui {
    pub fn new() -> io::Result<Self> {
        Ok(Self { terminal: Terminal::new(CrosstermBackend::new(stdout()))? })
    }

    pub fn enter(&mut self) -> io::Result<()> {
        enable_raw_mode()?;
        execute!(stdout(), EnterAlternateScreen)?;
        install_panic_hook();
        self.terminal.clear()?;
        Ok(())
    }

    pub fn exit(&mut self) -> io::Result<()> {
        restore()
    }
}

fn restore() -> io::Result<()> {
    execute!(stdout(), LeaveAlternateScreen)?;
    disable_raw_mode()
}

fn install_panic_hook() {
    let previous = std::panic::take_hook();
    std::panic::set_hook(Box::new(move |info| {
        let _ = restore();
        previous(info);
    }));
}