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|
use crossterm::{
event::{
self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEvent, KeyModifiers,
},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::io;
use tui::{
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
widgets::Paragraph,
Frame, Terminal,
};
enum Signal {
None,
Exit,
}
#[derive(Default)]
struct App {}
impl App {
fn handle_input(&mut self, key: KeyEvent) -> Signal {
match key.modifiers {
KeyModifiers::CONTROL => match key.code {
KeyCode::Char('c') => {
return Signal::Exit;
}
_ => {}
},
KeyModifiers::NONE => match key.code {
KeyCode::Char('q') => {
return Signal::Exit;
}
_ => {}
},
_ => {}
}
return Signal::None;
}
fn draw<B: Backend>(&self, f: &mut Frame<B>) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.constraints([Constraint::Percentage(100)].as_ref())
.split(f.size());
f.render_widget(Paragraph::new("test"), chunks[0]);
}
}
fn main() -> io::Result<()> {
let app = App::default();
let mut terminal = init_terminal()?;
let result = run(app, &mut terminal);
cleanup_terminal(terminal)?;
result
}
fn init_terminal() -> Result<Terminal<CrosstermBackend<io::Stdout>>, io::Error> {
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
Terminal::new(backend)
}
fn cleanup_terminal<B>(mut terminal: Terminal<B>) -> Result<(), io::Error>
where
B: Backend + io::Write,
{
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture,
)?;
terminal.show_cursor()?;
Ok(())
}
fn run<B: Backend>(mut app: App, terminal: &mut Terminal<B>) -> io::Result<()> {
loop {
terminal.draw(|f| app.draw(f))?;
if let Event::Key(key) = event::read()? {
if let Signal::Exit = app.handle_input(key) {
return Ok(());
}
}
}
}
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