1 files changed, 14 insertions, 0 deletions
diff --git a/src/client/util/DocumentManager.ts b/src/client/util/DocumentManager.ts
index eada5af75..7407fa2b3 100644
--- a/src/client/util/DocumentManager.ts
+++ b/src/client/util/DocumentManager.ts
@@ -209,6 +209,20 @@ export class DocumentManager {
         finished?.();
     };
 
+    public static LinkCommonAncestor(linkDoc: Doc) {
+        const anchor = (which: number) => {
+            const anch = DocCast(linkDoc['link_anchor_' + which]);
+            const anchor = anch?.layout_unrendered ? DocCast(anch.annotationOn) : anch;
+            return DocumentManager.Instance.getDocumentView(anchor);
+        };
+        const anchor1 = anchor(1);
+        const anchor2 = anchor(2);
+        return anchor1
+            ?.docViewPath()
+            .reverse()
+            .find(ancestor => anchor2?.docViewPath().includes(ancestor));
+    }
+
     // shows a documentView by:
     // traverses down through the viewPath of contexts to the view:
     //           focusing on each context