From ac7be25ba8ed32d91b51adde764b65d649ec10ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sun, 27 Sep 2020 12:07:19 +0000
Subject: [PATCH] Bug 1666827 - Mark browsing contexts where we host static
 documents as "printing". r=smaug

This prevents e.g. navigating the print preview document.

I can try to come up with a test for this, though testing for something
not happening is always a bit more annoying... :)

Depends on D91438

Differential Revision: https://phabricator.services.mozilla.com/D91439
---
 dom/base/nsGlobalWindowOuter.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dom/base/nsGlobalWindowOuter.cpp b/dom/base/nsGlobalWindowOuter.cpp
index b7ad84223a73..1a40d536a4d7 100644
--- a/dom/base/nsGlobalWindowOuter.cpp
+++ b/dom/base/nsGlobalWindowOuter.cpp
@@ -5357,6 +5357,8 @@ Nullable<WindowProxyHolder> nsGlobalWindowOuter::Print(
       aError.ThrowNotAllowedError("No browsing context");
       return nullptr;
     }
+
+    Unused << bc->Top()->SetIsPrinting(true);
     nsCOMPtr<nsIDocShell> cloneDocShell = bc->GetDocShell();
     MOZ_DIAGNOSTIC_ASSERT(cloneDocShell);
     cloneDocShell->GetContentViewer(getter_AddRefs(cv));