lsp: Resolve completion items missing documentation on idle (#4406)

Some language servers may not send the `documentation` field if it
is expensive to compute. Clients can request the missing field with
a completionItem/resolve request.

In this change we use the idle-timeout event to ensure that the current
completion item is resolved.

1 files changed, 8 insertions, 0 deletions

diff --git a/helix-term/src/ui/menu.rs b/helix-term/src/ui/menu.rs
index 4b1155e3..75769b90 100644
--- a/helix-term/src/ui/menu.rs
+++ b/helix-term/src/ui/menu.rs
@@ -206,6 +206,14 @@ impl<T: Item> Menu<T> {
         })
     }
 
+    pub fn selection_mut(&mut self) -> Option<&mut T> {
+        self.cursor.and_then(|cursor| {
+            self.matches
+                .get(cursor)
+                .map(|(index, _score)| &mut self.options[*index])
+        })
+    }
+
     pub fn is_empty(&self) -> bool {
         self.matches.is_empty()
     }