From a69a43015ec414bd1a9577c03fbeb5c3b27fb55f Mon Sep 17 00:00:00 2001
From: yipstanley <stanley_yip@brown.edu>
Date: Thu, 11 Jul 2019 12:36:34 -0400
Subject: fixes

---
 src/client/views/nodes/LinkMenuGroup.tsx | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

(limited to 'src/client/views/nodes/LinkMenuGroup.tsx')

diff --git a/src/client/views/nodes/LinkMenuGroup.tsx b/src/client/views/nodes/LinkMenuGroup.tsx
index e4cf56d20..97f2e13ae 100644
--- a/src/client/views/nodes/LinkMenuGroup.tsx
+++ b/src/client/views/nodes/LinkMenuGroup.tsx
@@ -45,7 +45,15 @@ export class LinkMenuGroup extends React.Component<LinkMenuGroupProps> {
             document.removeEventListener("pointermove", this.onLinkButtonMoved);
             document.removeEventListener("pointerup", this.onLinkButtonUp);
 
-            let draggedDocs = this.props.group.map(linkDoc => LinkManager.Instance.getOppositeAnchor(linkDoc, this.props.sourceDoc));
+            let draggedDocs: Doc[] = [];
+            this.props.group.forEach(
+                (doc: Doc) => {
+                    let opp = LinkManager.Instance.getOppositeAnchor(doc, this.props.sourceDoc);
+                    if (opp) {
+                        draggedDocs.push(opp);
+                    }
+                }
+            )
             let dragData = new DragManager.DocumentDragData(draggedDocs, draggedDocs.map(d => undefined));
 
             DragManager.StartLinkedDocumentDrag([this._drag.current], this.props.sourceDoc, dragData, e.x, e.y, {
@@ -72,8 +80,10 @@ export class LinkMenuGroup extends React.Component<LinkMenuGroupProps> {
     render() {
         let groupItems = this.props.group.map(linkDoc => {
             let destination = LinkManager.Instance.getOppositeAnchor(linkDoc, this.props.sourceDoc);
-            return <LinkMenuItem key={destination[Id] + this.props.sourceDoc[Id]} groupType={this.props.groupType}
-                linkDoc={linkDoc} sourceDoc={this.props.sourceDoc} destinationDoc={destination} showEditor={this.props.showEditor} />;
+            if (destination) {
+                return <LinkMenuItem key={destination[Id] + this.props.sourceDoc[Id]} groupType={this.props.groupType}
+                    linkDoc={linkDoc} sourceDoc={this.props.sourceDoc} destinationDoc={destination} showEditor={this.props.showEditor} />;
+            }
         });
 
         return (
-- 
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