fix: autocomplete suggestions for using cursor position

Signed-off-by: ADITYA TIWARI <adityatiwari342005@gmail.com>

web/ui/module/codemirror-promql/src/complete/hybrid.test.ts

@@ -299,6 +299,12 @@ describe('analyzeCompletion test', () => {
       pos: 33, // cursor is between the bracket after the comma
       expectedContext: [{ kind: ContextKind.LabelName, metricName: 'metric_name' }],
     },
+    {
+      title: 'no label suggestions after closing matcher',
+      expr: 'up{job="prometheus"}',
+      pos: 20, // cursor is right after the closing curly bracket
+      expectedContext: [],
+    },
     {
       title: 'continue autocomplete labelName that defined a metric',
       expr: '{myL}',

web/ui/module/codemirror-promql/src/complete/hybrid.ts

@@ -400,12 +400,18 @@ export function analyzeCompletion(state: EditorState, node: SyntaxNode, pos: num
       // so we have or to autocomplete any kind of labelName or to autocomplete only the labelName associated to the metric
       result.push({ kind: ContextKind.LabelName, metricName: getMetricNameInGroupBy(node, state) });
       break;
-    case LabelMatchers:
+    case LabelMatchers: {
+      if (pos >= node.to) {
+        // Cursor is outside of the label matcher block (e.g. right after `}`),
+        // so don't offer label-related completions anymore.
+        break;
+      }
       // In that case we are in the given situation:
       //       metric_name{} or {}
       // so we have or to autocomplete any kind of labelName or to autocomplete only the labelName associated to the metric
       result.push({ kind: ContextKind.LabelName, metricName: getMetricNameInVectorSelector(node, state) });
       break;
+    }
     case LabelName:
       if (node.parent?.type.id === GroupingLabels) {
         // In this case we are in the given situation: