Add terminal separator

src/terminal.rs

@@ -0,0 +1,29 @@
+use std::cmp::{max, min};
+use termion;
+use termion::color;
+
+pub struct Terminal {
+    width: Option<u16>,
+}
+
+impl Terminal {
+    pub fn new() -> Self {
+        Self {
+            width: termion::terminal_size().map(|(w, _)| w).ok(),
+        }
+    }
+
+    pub fn print_separator<P: AsRef<str>>(&self, message: P) {
+        let message = message.as_ref();
+        if let Some(width) = self.width {
+            print!("\n{}―― {} ", color::Fg(color::LightWhite), message);
+            let border = max(2, min(80, width as usize) - 3 - message.len());
+            for _ in 0..border {
+                print!("―");
+            }
+            println!("{}", color::Fg(color::Reset));
+        } else {
+            println!("―― {} ――", message);
+        }
+    }
+}