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// bibiman - a TUI for managing BibLaTeX databases
// Copyright (C) 2024 lukeflo
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
/////
use crate::frontend::app::App;
use crate::frontend::event::EventHandler;
use color_eyre::eyre::Result;
use crossterm::event::{DisableMouseCapture, EnableMouseCapture};
use crossterm::terminal::{self, EnterAlternateScreen, LeaveAlternateScreen};
use ratatui::backend::{Backend, CrosstermBackend};
// use ratatui::backend::CrosstermBackend as Backend;
use ratatui::Terminal;
use std::io::{self, stdout, Stdout};
use std::panic;
use std::{
ops::{Deref, DerefMut},
time::Duration,
};
// pub type IO = std::io::{{crossterm_io | title_case}};
// pub fn io() -> IO {
// std::io::{{crossterm_io}}()
// }
/// Representation of a terminal user interface.
///
/// It is responsible for setting up the terminal,
/// initializing the interface and handling the draw events.
#[derive(Debug)]
pub struct Tui {
/// Interface to the Terminal.
terminal: ratatui::Terminal<CrosstermBackend<Stdout>>,
/// Terminal event handler.
pub events: EventHandler,
}
impl Tui {
/// Constructs a new instance of [`Tui`].
pub fn new() -> Result<Self> {
let backend = CrosstermBackend::new(stdout());
let terminal = Terminal::new(backend)?;
let events = EventHandler::new(250);
Ok(Self { terminal, events })
}
/// Initializes the terminal interface.
///
/// It enables the raw mode and sets terminal properties.
pub fn init(&mut self) -> Result<()> {
terminal::enable_raw_mode()?;
crossterm::execute!(io::stdout(), EnterAlternateScreen, EnableMouseCapture)?;
// Define a custom panic hook to reset the terminal properties.
// This way, you won't have your terminal messed up if an unexpected error happens.
let panic_hook = panic::take_hook();
panic::set_hook(Box::new(move |panic| {
Self::reset().expect("failed to reset the terminal");
panic_hook(panic);
}));
self.terminal.hide_cursor()?;
self.terminal.clear()?;
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) -> Result<()> {
// self.terminal.draw(|frame| ui::render(app, frame))?;
self.terminal
.draw(|frame| frame.render_widget(app, frame.area()))?;
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() -> Result<()> {
terminal::disable_raw_mode()?;
crossterm::execute!(io::stdout(), LeaveAlternateScreen, DisableMouseCapture)?;
Ok(())
}
/// Exits the terminal interface.
///
/// It disables the raw mode and reverts back the terminal properties.
pub fn exit(&mut self) -> Result<()> {
Self::reset()?;
self.terminal.show_cursor()?;
Ok(())
}
}
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