smarkdown 0.1.0

A simple markdown tui editor, simple, fast, good!
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mod app;
mod config;
mod editor;
mod highlight;
mod ui;

use app::App;
use config::Config;
use crossterm::event::{
    self, Event, KeyboardEnhancementFlags, PopKeyboardEnhancementFlags,
    PushKeyboardEnhancementFlags,
};
use crossterm::execute;
use crossterm::terminal::{
    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
};
use editor::Buffer;
use ratatui::backend::CrosstermBackend;
use ratatui::Terminal;
use std::io;
use std::time::Duration;

fn main() -> io::Result<()> {
    let config = Config::load_or_create();

    let buffer = std::env::args()
        .nth(1)
        .map(std::path::PathBuf::from)
        .and_then(|p| Buffer::from_file(p).ok())
        .unwrap_or_default();

    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen)?;
    let supports_keyboard_enhancement = crossterm::terminal::supports_keyboard_enhancement()
        .unwrap_or(false);
    if supports_keyboard_enhancement {
        execute!(
            stdout,
            PushKeyboardEnhancementFlags(KeyboardEnhancementFlags::DISAMBIGUATE_ESCAPE_CODES)
        )?;
    }
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    let mut app = App::new(config, buffer);
    let result = run(&mut terminal, &mut app);

    if supports_keyboard_enhancement {
        execute!(terminal.backend_mut(), PopKeyboardEnhancementFlags)?;
    }
    disable_raw_mode()?;
    execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
    terminal.show_cursor()?;
    result
}

fn run<B: ratatui::backend::Backend>(terminal: &mut Terminal<B>, app: &mut App) -> io::Result<()> {
    loop {
        terminal.draw(|frame| ui::draw(frame, app))?;

        if event::poll(Duration::from_millis(100))? {
            if let Event::Key(key) = event::read()? {
                if key.kind == crossterm::event::KeyEventKind::Press {
                    app.handle_key(key);
                }
            }
        }

        if app.should_quit {
            return Ok(());
        }
    }
}