fixed up writing to/deleting (but overflows still happen it seems)

src/display/body.rs

@@ -195,6 +195,16 @@ impl SigninPage {
         ]
         .into()
     }
+
+    #[inline]
+    fn char(&mut self, c: char) {
+        match self.cursor {
+            SigninCursorLocation::Hostname => {
+                self.hostname.push(c);
+            }
+            SigninCursorLocation::Ok => {}
+        }
+    }
 }
 
 impl Page for SigninPage {
@@ -206,10 +216,16 @@ impl Page for SigninPage {
     ) -> Result<()> {
         match event {
             Event::Key(key) => match key {
-                termion::event::Key::Char(_) => {}
+                termion::event::Key::Char(c) => self.char(c),
                 termion::event::Key::Up => self.next(),
                 termion::event::Key::Down => self.previous(),
-                termion::event::Key::Backspace => {}
+                termion::event::Key::Backspace => {
+                    if let SigninCursorLocation::Hostname =
+                        self.cursor
+                    {
+                        self.hostname.pop();
+                    }
+                }
                 termion::event::Key::Delete => {}
                 termion::event::Key::Left => {}
                 termion::event::Key::Right => {}