Synchronize deck only if necessary

Look at the modification time of the deck, and synchronize if it has
been modified after the last deck read.

1 files changed, 14 insertions, 7 deletions

diff --git a/src/gui/message.rs b/src/gui/message.rs
index 01d124e..28a1d2c 100644
--- a/src/gui/message.rs
+++ b/src/gui/message.rs
@@ -12,8 +12,9 @@ use tui::{
 pub fn show<B: Backend>(
     terminal: &mut Terminal<B>,
     events: &Events,
-    title: &String,
-    message: &String,
+    title: &str,
+    message: &str,
+    wait: bool,
 ) -> Result<()> {
     loop {
         terminal.draw(|f| {
@@ -26,16 +27,22 @@ pub fn show<B: Backend>(
             let d1 = util::title(title);
             f.render_widget(d1, chunks[0]);
 
-            let message = Paragraph::new(util::center_vertically(chunks[1], &message))
+            let message = Paragraph::new(util::center_vertically(chunks[1], &message.to_string()))
                 .alignment(Alignment::Center);
             f.render_widget(message, chunks[1]);
         })?;
 
-        if let Event::Input(key) = events.next()? {
-            match key {
-                Key::Char('q') => return Ok(()),
-                _ => (),
+        if wait {
+            if let Event::Input(key) = events.next()? {
+                match key {
+                    Key::Char('q') => break,
+                    _ => (),
+                }
             }
+        } else {
+            break;
         }
     }
+
+    Ok(())
 }