From 5b561d6fce6ab7e732c78eaac4388ca5367f496f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20Goco=C5=82?=
 <93707234+jakub-gocol-red@users.noreply.github.com>
Date: Fri, 4 Aug 2023 08:42:41 +0200
Subject: [PATCH] Add env var to allow keeping the existent navigation on a
 fragment load

---
 Source/WebCore/loader/FrameLoader.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
index 16b8749be53b3..58d2728898412 100644
--- a/Source/WebCore/loader/FrameLoader.cpp
+++ b/Source/WebCore/loader/FrameLoader.cpp
@@ -3241,8 +3241,16 @@ void FrameLoader::continueFragmentScrollAfterNavigationPolicy(const ResourceRequ
     // frame to be deallocated.
     Ref<Frame> protectedFrame(m_frame);
 
+    static bool keepNavigationOnFragmentLoad = false;
+    static bool keepNavigationOnFragmentLoadInitialized = false;
+
+    if (!keepNavigationOnFragmentLoadInitialized) {
+        keepNavigationOnFragmentLoad = !!getenv("WPE_KEEP_NAVIGATION_ON_FRAGMENT_LOAD");
+        keepNavigationOnFragmentLoadInitialized = true;
+    }
+
     // If we have a provisional request for a different document, a fragment scroll should cancel it.
-    if (m_provisionalDocumentLoader && !equalIgnoringFragmentIdentifier(m_provisionalDocumentLoader->request().url(), request.url())) {
+    if (m_provisionalDocumentLoader && !equalIgnoringFragmentIdentifier(m_provisionalDocumentLoader->request().url(), request.url()) && !keepNavigationOnFragmentLoad) {
         m_provisionalDocumentLoader->stopLoading();
         FRAMELOADER_RELEASE_LOG(ResourceLoading, "continueFragmentScrollAfterNavigationPolicy: Clearing provisional document loader (m_provisionalDocumentLoader=%p)", m_provisionalDocumentLoader.get());
         setProvisionalDocumentLoader(nullptr);