From 3ec2af3e605957e5a82bda9124cd77145be4205b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Far=C3=A8s=20Sioni?=
 <82713835+fsioni@users.noreply.github.com>
Date: Mon, 19 Oct 2026 15:51:47 +0200
Subject: [PATCH] fix(desktop): keep PDF preview reloads inside the guest

---
 apps/desktop/src/preview/GuestInput.test.ts | 15 +++++++++++++++
 apps/desktop/src/preview/GuestInput.ts      |  8 +++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/apps/desktop/src/preview/GuestInput.test.ts b/apps/desktop/src/preview/GuestInput.test.ts
index d607b217262f7..7c7f499bc2936 100644
--- a/apps/desktop/src/preview/GuestInput.test.ts
+++ b/apps/desktop/src/preview/GuestInput.test.ts
@@ -19,6 +19,8 @@ const makeGuest = ({
     focusedFrame: focused ? {} : null,
     insertText: vi.fn(async () => {}),
     sendInputEvent: vi.fn(),
+    reload: vi.fn(),
+    reloadIgnoringCache: vi.fn(),
   };
   return {
     webContents,
@@ -34,6 +36,19 @@ const makeGuest = ({
 };
 
 describe("preview guest input", () => {
+  it.each([undefined, false, true])(
+    "reloads only the guest with ignoreCache=%s",
+    async (ignoreCache) => {
+      const guest = makeGuest({ focused: false });
+      await expect(
+        guest.send("Page.reload", ignoreCache === undefined ? {} : { ignoreCache }),
+      ).resolves.toEqual({});
+      expect(guest.webContents.reload).toHaveBeenCalledTimes(ignoreCache ? 0 : 1);
+      expect(guest.webContents.reloadIgnoringCache).toHaveBeenCalledTimes(ignoreCache ? 1 : 0);
+      expect(guest.sendCommand).not.toHaveBeenCalled();
+    },
+  );
+
   it("types into an unfocused guest's own page, not the app's focused field", async () => {
     const guest = makeGuest({ focused: false });
     await guest.send("Input.insertText", { text: "pairing-code" });
diff --git a/apps/desktop/src/preview/GuestInput.ts b/apps/desktop/src/preview/GuestInput.ts
index 773d6b79873bc..35006dfcec08b 100644
--- a/apps/desktop/src/preview/GuestInput.ts
+++ b/apps/desktop/src/preview/GuestInput.ts
@@ -115,13 +115,19 @@ const evaluate = async (debuggee: Electron.Debugger, expression: string) => {
   return reply.result?.value;
 };
 
-/** Sends one command to the guest's page, keeping key and text input inside it. */
+/** Sends one command to the guest's page, keeping reloads and input inside it. */
 export const sendPageCommand = async (
   webContents: Electron.WebContents,
   debuggee: Electron.Debugger,
   method: string,
   params: Record<string, unknown>,
 ): Promise<unknown> => {
+  // Electron's debugger routes Page.reload on a webview to its embedder window.
+  if (method === "Page.reload") {
+    if (params["ignoreCache"] === true) webContents.reloadIgnoringCache();
+    else webContents.reload();
+    return {};
+  }
   if (!FOCUS_ROUTED_INPUT.has(method) || webContents.focusedFrame) {
     return debuggee.sendCommand(method, params);
   }