From d6ff85fdd37a24ecef29b3e10b7387fbba6cdecc Mon Sep 17 00:00:00 2001
From: schroda <50052685+schroda@users.noreply.github.com>
Date: Fri, 27 Dec 2024 18:23:16 +0100
Subject: [PATCH] Prevent unnecessary "page load state" updates

Only update state in case it has changed
---
 src/modules/reader/components/viewer/ReaderViewer.tsx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/modules/reader/components/viewer/ReaderViewer.tsx b/src/modules/reader/components/viewer/ReaderViewer.tsx
index 3ac57dbb..f846aaee 100644
--- a/src/modules/reader/components/viewer/ReaderViewer.tsx
+++ b/src/modules/reader/components/viewer/ReaderViewer.tsx
@@ -186,9 +186,13 @@ const BaseReaderViewer = forwardRef(
                     img.src = url;
                 }
 
+                if (pageLoadStates[index]) {
+                    return;
+                }
+
                 setPageLoadStates((statePageLoadStates) => statePageLoadStates.toSpliced(index, 1, { loaded: true }));
             },
-            [actualPages, readingMode],
+            [actualPages, readingMode, pageLoadStates],
         );
 
         const onError = useCallback((pageIndex: number) => {