1 files changed, 11 insertions, 0 deletions
diff --git a/src/client/util/DocumentManager.ts b/src/client/util/DocumentManager.ts
index 97051207b..8dba54541 100644
--- a/src/client/util/DocumentManager.ts
+++ b/src/client/util/DocumentManager.ts
@@ -46,6 +46,7 @@ export class DocumentManager {
         DocumentView.addViewRenderedCb = this.AddViewRenderedCb;
         DocumentView.getFirstDocumentView = this.getFirstDocumentView;
         DocumentView.getDocumentView = this.getDocumentView;
+        DocumentView.getDocViewIndex = this.getDocViewIndex;
         DocumentView.getContextPath = DocumentManager.GetContextPath;
         DocumentView.getLightboxDocumentView = this.getLightboxDocumentView;
         observe(Doc.CurrentlyLoading, change => {
@@ -138,6 +139,16 @@ export class DocumentManager {
         );
     }
 
+    public getDocViewIndex(target: Doc): number {
+        const docViewArray = DocumentManager.Instance.DocumentViews;
+        for (let i = 0; i < docViewArray.length; ++i){
+            if (docViewArray[i].Document == target){
+                return i;
+            }
+        }
+        return -1;
+    }
+
     public getLightboxDocumentView = (toFind: Doc): DocumentView | undefined => {
         const views: DocumentView[] = [];
         DocumentManager.Instance.DocumentViews.forEach(view => DocumentView.LightboxContains(view) && Doc.AreProtosEqual(view.Document, toFind) && views.push(view));