1 files changed, 9 insertions, 8 deletions

diff --git a/src/client/views/pdf/PDFViewer.tsx b/src/client/views/pdf/PDFViewer.tsx
index b0b7816b8..9610a71ac 100644
--- a/src/client/views/pdf/PDFViewer.tsx
+++ b/src/client/views/pdf/PDFViewer.tsx
@@ -144,6 +144,8 @@ export class PDFViewer extends React.Component<IViewerProps> {
         }
     };
 
+    @observable _scrollHeight = 0;
+
     @action
     initialLoad = async () => {
         if (this._pageSizes.length === 0) {
@@ -164,8 +166,8 @@ export class PDFViewer extends React.Component<IViewerProps> {
                     )
                 )
             );
-            this.props.Document.scrollHeight = (this._pageSizes.reduce((size, page) => size + page.height, 0) * 96) / 72;
         }
+        runInAction(() => (this._scrollHeight = (this._pageSizes.reduce((size, page) => size + page.height, 0) * 96) / 72));
     };
 
     _scrollStopper: undefined | (() => void);
@@ -177,7 +179,7 @@ export class PDFViewer extends React.Component<IViewerProps> {
         let focusSpeed: Opt<number>;
         if (doc !== this.props.rootDoc && mainCont) {
             const windowHeight = this.props.PanelHeight() / (this.props.NativeDimScaling?.() || 1);
-            const scrollTo = doc.unrendered ? scrollTop : Utils.scrollIntoView(scrollTop, doc[HeightSym](), NumCast(this.props.layoutDoc._scrollTop), windowHeight, 0.1 * windowHeight, NumCast(this.props.Document.scrollHeight));
+            const scrollTo = doc.unrendered ? scrollTop : Utils.scrollIntoView(scrollTop, doc[HeightSym](), NumCast(this.props.layoutDoc._scrollTop), windowHeight, 0.1 * windowHeight, this._scrollHeight);
             if (scrollTo !== undefined && scrollTo !== this.props.layoutDoc._scrollTop) {
                 if (!this._pdfViewer) this._initialScroll = { loc: scrollTo, easeFunc: options.easeFunc };
                 else if (!options.instant) this._scrollStopper = smoothScroll((focusSpeed = options.zoomTime ?? 500), mainCont, scrollTo, options.easeFunc, this._scrollStopper);
@@ -453,10 +455,6 @@ export class PDFViewer extends React.Component<IViewerProps> {
         }
     };
 
-    scrollXf = () => {
-        return this._mainCont.current ? this.props.ScreenToLocalTransform().translate(0, NumCast(this.props.layoutDoc._scrollTop)) : this.props.ScreenToLocalTransform();
-    };
-
     onClick = (e: React.MouseEvent) => {
         this._scrollStopper?.();
         if (this._setPreviewCursor && e.button === 0 && Math.abs(e.clientX - this._downX) < Utils.DRAG_THRESHOLD && Math.abs(e.clientY - this._downY) < Utils.DRAG_THRESHOLD) {
@@ -504,10 +502,12 @@ export class PDFViewer extends React.Component<IViewerProps> {
         );
     }
 
+    getScrollHeight = () => this._scrollHeight;
     showInfo = action((anno: Opt<Doc>) => (this._overlayAnnoInfo = anno));
+    scrollXf = () => (this._mainCont.current ? this.props.ScreenToLocalTransform().translate(0, NumCast(this.props.layoutDoc._scrollTop)) : this.props.ScreenToLocalTransform());
     overlayTransform = () => this.scrollXf().scale(1 / NumCast(this.props.layoutDoc._viewScale, 1));
-    panelWidth = () => this.props.PanelWidth() / (this.props.NativeDimScaling?.() || 1); // (this.Document.scrollHeight || Doc.NativeHeight(this.Document) || 0);
-    panelHeight = () => this.props.PanelHeight() / (this.props.NativeDimScaling?.() || 1); // () => this._pageSizes.length && this._pageSizes[0] ? this._pageSizes[0].width : Doc.NativeWidth(this.Document);
+    panelWidth = () => this.props.PanelWidth() / (this.props.NativeDimScaling?.() || 1);
+    panelHeight = () => this.props.PanelHeight() / (this.props.NativeDimScaling?.() || 1);
     transparentFilter = () => [...this.props.docFilters(), Utils.IsTransparentFilter()];
     opaqueFilter = () => [...this.props.docFilters(), Utils.noDragsDocFilter, ...(DragManager.docsBeingDragged.length ? [] : [Utils.IsOpaqueFilter()])];
     childStyleProvider = (doc: Doc | undefined, props: Opt<DocumentViewProps>, property: string): any => {
@@ -533,6 +533,7 @@ export class PDFViewer extends React.Component<IViewerProps> {
                 isAnnotationOverlay={true}
                 fieldKey={this.props.fieldKey + '-annotations'}
                 CollectionView={undefined}
+                getScrollHeight={this.getScrollHeight}
                 setPreviewCursor={this.setPreviewCursor}
                 setBrushViewer={this.setBrushViewer}
                 PanelHeight={this.panelHeight}