Add support for labels in custom menu keymaps

helix-term/src/config.rs

@@ -174,6 +174,39 @@ mod tests {
         );
     }
 
+    #[test]
+    fn parsing_menus() {
+        use crate::keymap;
+        use crate::keymap::Keymap;
+        use helix_core::hashmap;
+        use helix_view::document::Mode;
+
+        let sample_keymaps = r#"
+            [keys.normal]
+            f = { f = "file_picker", c = "wclose" }
+            b = { label = "buffer", b = "buffer_picker", n = "goto_next_buffer" }
+        "#;
+
+        assert_eq!(
+            toml::from_str::<Config>(sample_keymaps).unwrap(),
+            Config {
+                keys: hashmap! {
+                    Mode::Normal => Keymap::new(keymap!({ "Normal mode"
+                        "f" => { ""
+                            "f" => file_picker,
+                            "c" => wclose,
+                        },
+                        "b" => { "buffer"
+                            "b" => buffer_picker,
+                            "n" => goto_next_buffer,
+                        },
+                    })),
+                },
+                ..Default::default()
+            }
+        );
+    }
+
     #[test]
     fn keys_resolve_to_correct_defaults() {
         // From serde default

helix-term/src/keymap.rs

@@ -184,13 +184,22 @@ impl<'de> serde::de::Visitor<'de> for KeyTrieVisitor {
     where
         M: serde::de::MapAccess<'de>,
     {
+        let mut name = "";
         let mut mapping = HashMap::new();
         let mut order = Vec::new();
-        while let Some((key, value)) = map.next_entry::<KeyEvent, KeyTrie>()? {
-            mapping.insert(key, value);
-            order.push(key);
+
+        while let Some(key) = map.next_key::<&str>()? {
+            match key {
+                "label" => name = map.next_value::<&str>()?,
+                _ => {
+                    let key_event = key.parse::<KeyEvent>().map_err(serde::de::Error::custom)?;
+                    let key_trie = map.next_value::<KeyTrie>()?;
+                    mapping.insert(key_event, key_trie);
+                    order.push(key_event);
+                }
+            }
         }
-        Ok(KeyTrie::Node(KeyTrieNode::new("", mapping, order)))
+        Ok(KeyTrie::Node(KeyTrieNode::new(name, mapping, order)))
     }
 }