From 8b210d872e3a9c540825be0e9fbb912514092def Mon Sep 17 00:00:00 2001
From: bob <bcz@cs.brown.edu>
Date: Tue, 27 Aug 2019 12:03:16 -0400
Subject: fixes for doc decorations with resizing textboxes.

---
 src/client/views/collections/CollectionStackingView.tsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/client/views/collections/CollectionStackingView.tsx')

diff --git a/src/client/views/collections/CollectionStackingView.tsx b/src/client/views/collections/CollectionStackingView.tsx
index 6f22f2d2a..97b31bf2a 100644
--- a/src/client/views/collections/CollectionStackingView.tsx
+++ b/src/client/views/collections/CollectionStackingView.tsx
@@ -278,7 +278,8 @@ export class CollectionStackingView extends CollectionSubView(doc => doc) {
     }
 
     getDocTransform(doc: Doc, dref: HTMLDivElement) {
-        let y = this._scroll;
+        if (!dref) return Transform.Identity();
+        let y = this._scroll; // required for document decorations to update when the text box container is scrolled
         let { scale, translateX, translateY } = Utils.GetScreenTransform(dref);
         let outerXf = Utils.GetScreenTransform(this._masonryGridRef!);
         let offset = this.props.ScreenToLocalTransform().transformDirection(outerXf.translateX - translateX, outerXf.translateY - translateY);
-- 
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