Add live preview to theme picker

helix-term/src/application.rs

@@ -108,13 +108,7 @@ impl Application {
                     .ok()
                     .filter(|theme| (true_color || theme.is_16_color()))
             })
-            .unwrap_or_else(|| {
-                if true_color {
-                    theme_loader.default()
-                } else {
-                    theme_loader.base16_default()
-                }
-            });
+            .unwrap_or_else(|| theme_loader.default_theme(true_color));
 
         let syn_loader_conf = user_syntax_loader().unwrap_or_else(|err| {
             eprintln!("Bad language config: {}", err);
@@ -358,13 +352,7 @@ impl Application {
                     })
                     .ok()
                     .filter(|theme| (true_color || theme.is_16_color()))
-                    .unwrap_or_else(|| {
-                        if true_color {
-                            self.theme_loader.default()
-                        } else {
-                            self.theme_loader.base16_default()
-                        }
-                    }),
+                    .unwrap_or_else(|| self.theme_loader.default_theme(true_color)),
             );
         }