llmx/codex-rs/tui/src/tui.rs

use std::io::stdout;
use std::io::Stdout;
use std::io::{self};

use crossterm::event::DisableMouseCapture;
use crossterm::event::EnableMouseCapture;
use ratatui::backend::CrosstermBackend;
use ratatui::crossterm::execute;
use ratatui::crossterm::terminal::disable_raw_mode;
use ratatui::crossterm::terminal::enable_raw_mode;
use ratatui::crossterm::terminal::EnterAlternateScreen;
use ratatui::crossterm::terminal::LeaveAlternateScreen;
use ratatui::Terminal;

/// A type alias for the terminal type used in this application
pub type Tui = Terminal<CrosstermBackend<Stdout>>;

/// Initialize the terminal
pub fn init() -> io::Result<Tui> {
    execute!(stdout(), EnterAlternateScreen)?;
    execute!(stdout(), EnableMouseCapture)?;
    enable_raw_mode()?;
    set_panic_hook();
    Terminal::new(CrosstermBackend::new(stdout()))
}

fn set_panic_hook() {
    let hook = std::panic::take_hook();
    std::panic::set_hook(Box::new(move |panic_info| {
        let _ = restore(); // ignore any errors as we are already failing
        hook(panic_info);
    }));
}

/// Restore the terminal to its original state
pub fn restore() -> io::Result<()> {
    execute!(stdout(), DisableMouseCapture)?;
    execute!(stdout(), LeaveAlternateScreen)?;
    disable_raw_mode()?;
    Ok(())
}