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use std::io;
use crate::ui;
use crossterm::event::{DisableMouseCapture, EnableMouseCapture};
use crossterm::terminal::{self, *};
use std::panic;
use crate::app::{App, AppResult};
use crate::event::EventHandler;
pub type CrosstermTerminal = ratatui::Terminal<ratatui::backend::CrosstermBackend<std::io::Stderr>>;
#[derive(Debug)]
pub struct Tui {
terminal: CrosstermTerminal,
pub events: EventHandler,
}
impl Tui {
pub fn new(terminal: CrosstermTerminal, events: EventHandler) -> Self {
Self { terminal, events }
}
pub fn init(&mut self) -> AppResult<()> {
terminal::enable_raw_mode()?;
crossterm::execute!(io::stdout(), EnterAlternateScreen, EnableMouseCapture)?;
let panic_hook = panic::take_hook();
panic::set_hook(Box::new(move |panic| {
Self::reset().expect("failed to reset the terminal");
panic_hook(panic);
}));
Ok(())
}
/// [`Draw`] the terminal interface by [`rendering`] the widgets.
///
/// [`Draw`]: ratatui::Terminal::draw
/// [`rendering`]: crate::ui::render
pub fn draw(&mut self, app: &mut App) -> AppResult<()> {
self.terminal.draw(|frame| ui::render(app, frame))?;
Ok(())
}
/// Resets the terminal interface.
///
/// This function is also used for the panic hook to revert
/// the terminal properties if unexpected errors occur.
fn reset() -> AppResult<()> {
terminal::disable_raw_mode()?;
crossterm::execute!(io::stderr(), LeaveAlternateScreen, DisableMouseCapture)?;
Ok(())
}
/// Exits the terminal interface.
///
/// It disables the raw mode and reverts back the terminal properties.
pub fn exit(&mut self) -> AppResult<()> {
Self::reset()?;
self.terminal.show_cursor()?;
Ok(())
}
}
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