Display 'source' or 'detail' next to completion label

Author: krassowski

packages/jupyterlab-lsp/schema/completion.json

@@ -70,6 +70,13 @@
       "type": "boolean",
       "description": "Should perfect matches be included in the completion suggestions list?"
     },
+    "labelExtra": {
+      "title": "Text to display next to completion label",
+      "default": "auto",
+      "type": "string",
+      "enum": ["detail", "type", "source", "auto"],
+      "description": "What to display next to the completion label, one of: 'detail', 'type', 'source', 'auto'. The default 'auto' will display whichever information is available."
+    },
     "typesMap": {
       "title": "Mapping of custom kernel types to valid completion kind names",
       "description": "Mapping used for icon selection. The kernel types (keys) are case-insensitive. Accepted values are the names of CompletionItemKind and 'Kernel' literal. The defaults aim to provide good initial experience for Julia, Python and R kernels.",

packages/jupyterlab-lsp/src/features/completion/renderer.ts

@@ -18,6 +18,19 @@ export class LSPCompletionRenderer
     this.activeChanged = new Signal(this);
   }
 
+  protected getExtraInfo(item: LazyCompletionItem): string {
+    switch (this.options.integrator.settings.composite.labelExtra) {
+      case 'detail':
+        return item.detail;
+      case 'type':
+        return item.type;
+      case 'source':
+        return item.source.name;
+      case 'auto':
+        return [item.detail, item.type, item.source.name].filter(x => !!x)[0];
+    }
+  }
+
   createCompletionItemNode(
     item: LazyCompletionItem,
     orderedTypes: string[]
@@ -46,6 +59,10 @@ export class LSPCompletionRenderer
       });
     }
 
+    const extraText = this.getExtraInfo(item);
+    const extraElement = li.querySelector('.jp-Completer-typeExtended');
+    extraElement.textContent = extraText;
+
     return li;
   }