Support code lens in the editor

assets/settings/default.json

@@ -342,6 +342,17 @@
     // The delay in milliseconds that must elapse before drag and drop is allowed. Otherwise, a new text selection is created.
     "delay": 300,
   },
+  // Whether and how to display code lenses from language servers.
+  //
+  // Possible values:
+  //
+  // 1. Do not display code lenses.
+  //      "code_lens": "off",
+  // 2. Display code lenses from language servers above code elements.
+  //      "code_lens": "on",
+  // 3. Display code lenses in the code action menu.
+  //      "code_lens": "menu",
+  "code_lens": "off",
   // What to do when go to definition yields no results.
   //
   // 1. Do nothing: `none`

crates/collab/tests/integration/editor_tests.rs

@@ -1203,6 +1203,13 @@ async fn test_slow_lsp_server(cx_a: &mut TestAppContext, cx_b: &mut TestAppConte
         .await;
     let active_call_a = cx_a.read(ActiveCall::global);
     cx_b.update(editor::init);
+    cx_b.update(|cx| {
+        SettingsStore::update_global(cx, |store, cx| {
+            store.update_user_settings(cx, |settings| {
+                settings.editor.code_lens = Some(settings::CodeLens::Menu);
+            });
+        });
+    });
 
     let command_name = "test_command";
     let capabilities = lsp::ServerCapabilities {

crates/editor/src/actions.rs

@@ -849,6 +849,8 @@ actions!(
         ToggleIndentGuides,
         /// Toggles inlay hints display.
         ToggleInlayHints,
+        /// Toggles code lens display.
+        ToggleCodeLens,
         /// Toggles semantic highlights display.
         ToggleSemanticHighlights,
         /// Toggles inline values display.