1 files changed, 13 insertions, 7 deletions
diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
index 5b9f6139f..b2db1168d 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
@@ -1,4 +1,4 @@
-import { action, computed, IReactionDisposer, observable, reaction, runInAction } from "mobx";
+import { action, computed, IReactionDisposer, observable, reaction, runInAction, ObservableMap } from "mobx";
 import { observer } from "mobx-react";
 import { computedFn } from "mobx-utils";
 import { DateField } from "../../../../fields/DateField";
@@ -811,14 +811,14 @@ export class CollectionFreeFormView extends CollectionSubView<PanZoomDocument, P
     setPan(panX: number, panY: number, panTime: number = 0, clamp: boolean = false) {
         if (!this.isAnnotationOverlay && clamp) {
             // this section wraps the pan position, horizontally and/or vertically whenever the content is panned out of the viewing bounds
-            const docs = this.childLayoutPairs.filter(pair => pair.layout instanceof Doc).map(pair => pair.layout);
-            const measuredDocs = docs.filter(doc => doc && this.childDataProvider(doc, "") && this.childSizeProvider(doc, "")).
-                map(doc => ({ ...this.childDataProvider(doc, ""), ...this.childSizeProvider(doc, "") }));
+            const docs = this.childLayoutPairs.map(pair => pair.layout).filter(doc => doc instanceof Doc);
+            const measuredDocs = docs.map(doc => ({ pos: this.childPositionProviderUnmemoized(doc, ""), size: this.childSizeProviderUnmemoized(doc, "") }))
+                .filter(({ pos, size }) => pos && size).map(({ pos, size }) => ({ pos: pos!, size: size! }));
             if (measuredDocs.length) {
-                const ranges = measuredDocs.reduce(({ xrange, yrange }, { x, y, width, height }) =>  // computes range of content
+                const ranges = measuredDocs.reduce(({ xrange, yrange }, { pos, size }) =>  // computes range of content
                     ({
-                        xrange: { min: Math.min(xrange.min, x), max: Math.max(xrange.max, x + width) },
-                        yrange: { min: Math.min(yrange.min, y), max: Math.max(yrange.max, y + height) }
+                        xrange: { min: Math.min(xrange.min, pos.x), max: Math.max(xrange.max, pos.x + (size.width || 0)) },
+                        yrange: { min: Math.min(yrange.min, pos.y), max: Math.max(yrange.max, pos.y + (size.height || 0)) }
                     })
                     , {
                         xrange: { min: Number.MAX_VALUE, max: -Number.MAX_VALUE },
@@ -1105,10 +1105,16 @@ export class CollectionFreeFormView extends CollectionSubView<PanZoomDocument, P
         }
     }
 
+    childPositionProviderUnmemoized = (doc: Doc, replica: string) => {
+        return this._layoutPoolData.get(doc[Id] + (replica || ""));
+    }
     childDataProvider = computedFn(function childDataProvider(this: any, doc: Doc, replica: string) {
         return this._layoutPoolData.get(doc[Id] + (replica || ""));
     }.bind(this));
 
+    childSizeProviderUnmemoized = (doc: Doc, replica: string) => {
+        return this._layoutSizeData.get(doc[Id] + (replica || ""));
+    }
     childSizeProvider = computedFn(function childSizeProvider(this: any, doc: Doc, replica: string) {
         return this._layoutSizeData.get(doc[Id] + (replica || ""));
     }.bind(this));