Render basic tui and restore terminal

cove-tui/src/main.rs

@@ -1,3 +1,45 @@
-fn main() {
-    println!("Hello, world!");
+use std::io::{self, Stdout};
+use std::time::Duration;
+
+use crossterm::event::{DisableMouseCapture, EnableMouseCapture};
+use crossterm::execute;
+use crossterm::terminal::{EnterAlternateScreen, LeaveAlternateScreen};
+use tokio::time;
+use tui::backend::CrosstermBackend;
+use tui::widgets::{Block, Borders};
+use tui::Terminal;
+
+async fn run(terminal: &mut Terminal<CrosstermBackend<Stdout>>) -> anyhow::Result<()> {
+    terminal.draw(|f| {
+        let block = Block::default().title("Block").borders(Borders::ALL);
+        f.render_widget(block, f.size());
+    })?;
+    time::sleep(Duration::from_secs(1)).await;
+    Ok(())
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    let mut terminal = Terminal::new(CrosstermBackend::new(io::stdout()))?;
+
+    crossterm::terminal::enable_raw_mode()?;
+    execute!(
+        terminal.backend_mut(),
+        EnterAlternateScreen,
+        EnableMouseCapture
+    )?;
+
+    // Defer error handling so the terminal always gets restored properly
+    let result = run(&mut terminal).await;
+
+    crossterm::terminal::disable_raw_mode()?;
+    execute!(
+        terminal.backend_mut(),
+        LeaveAlternateScreen,
+        DisableMouseCapture
+    )?;
+
+    result?;
+
+    Ok(())
 }