From 84425e86e9b3554621ad4529baa00df8ddbb784d Mon Sep 17 00:00:00 2001
From: Elian Doran <contact@eliandoran.me>
Date: Mon, 29 Dec 2025 16:06:30 +0200
Subject: [PATCH] feat(client/pdf): filter out view config by fingerprint

---
 packages/pdfjs-viewer/src/history.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/pdfjs-viewer/src/history.ts b/packages/pdfjs-viewer/src/history.ts
index 714d121a0..cd31dcd8a 100644
--- a/packages/pdfjs-viewer/src/history.ts
+++ b/packages/pdfjs-viewer/src/history.ts
@@ -2,10 +2,16 @@ export default function interceptViewHistory() {
     const originalSetItem = Storage.prototype.setItem;
     Storage.prototype.setItem = function (key: string, value: string) {
         if (key === "pdfjs.history") {
-            console.log(`Intercepted setting view history: ${key} = ${value}`);
+            // Parse the history and remove entries that are not relevant.
+            const history = JSON.parse(value);
+            const fingerprint = window.PDFViewerApplication?.pdfDocument?.fingerprints?.[0];
+            if (fingerprint) {
+                history.files = history.files.filter((file: any) => file.fingerprint === fingerprint);
+            }
+
             window.parent.postMessage({
                 type: "pdfjs-viewer-save-view-history",
-                data: value
+                data: JSON.stringify(history)
             }, "*");
             return;
         }