YAMLabyrinth skeleton v0.0.1

src/tui.rs

@@ -0,0 +1,59 @@
+use anyhow::Result;
+use crossterm::event::{self, Event, KeyCode};
+use crossterm::execute;
+use crossterm::terminal::{
+    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
+};
+use ratatui::backend::CrosstermBackend;
+use ratatui::widgets::{Block, Borders, Paragraph};
+use ratatui::Terminal;
+use std::io::{stdout, Stdout};
+
+pub fn run() -> Result<()> {
+    install_panic_hook();
+    let mut terminal = enter()?;
+    let result = main_loop(&mut terminal);
+    leave()?;
+    result
+}
+
+fn install_panic_hook() {
+    let prev = std::panic::take_hook();
+    std::panic::set_hook(Box::new(move |info| {
+        let _ = leave();
+        prev(info);
+    }));
+}
+
+fn enter() -> Result<Terminal<CrosstermBackend<Stdout>>> {
+    enable_raw_mode()?;
+    execute!(stdout(), EnterAlternateScreen)?;
+    Ok(Terminal::new(CrosstermBackend::new(stdout()))?)
+}
+
+fn leave() -> Result<()> {
+    disable_raw_mode()?;
+    execute!(stdout(), LeaveAlternateScreen)?;
+    Ok(())
+}
+
+fn main_loop(terminal: &mut Terminal<CrosstermBackend<Stdout>>) -> Result<()> {
+    loop {
+        terminal.draw(|frame| {
+            let block = Block::default()
+                .borders(Borders::ALL)
+                .title(" YAMLabyrinth ");
+            let body = Paragraph::new(
+                "Welcome to the YAML labyrinth.\n\nPress [q] to flee.",
+            )
+            .block(block);
+            frame.render_widget(body, frame.size());
+        })?;
+
+        if let Event::Key(key) = event::read()? {
+            if key.code == KeyCode::Char('q') {
+                return Ok(());
+            }
+        }
+    }
+}