Bug 1711064 - patch 1 - Add a pref to control whether linkifying Save-as-PDF output is enabled. r=dholbert

Differential Revision: https://phabricator.services.mozilla.com/D115514

layout/generic/nsIFrame.cpp

@@ -29,6 +29,7 @@
 #include "mozilla/Sprintf.h"
 #include "mozilla/StaticAnalysisFunctions.h"
 #include "mozilla/StaticPrefs_layout.h"
+#include "mozilla/StaticPrefs_print.h"
 #include "mozilla/SVGMaskFrame.h"
 #include "mozilla/SVGObserverUtils.h"
 #include "mozilla/SVGTextFrame.h"
@@ -4000,7 +4001,8 @@ void nsIFrame::BuildDisplayListForChild(nsDisplayListBuilder* aBuilder,
   // for the same destination that entirely overlap each other, which adds
   // nothing useful to the final PDF.
   Maybe<nsDisplayListBuilder::Linkifier> linkifier;
-  if (aBuilder->IsForPrinting()) {
+  if (StaticPrefs::print_save_as_pdf_links_enabled() &&
+      aBuilder->IsForPrinting()) {
     linkifier.emplace(aBuilder, aChild);
     linkifier->MaybeAppendLink(aBuilder, aChild, aLists.Content());
   }

modules/libpref/init/StaticPrefList.yaml

@@ -9837,6 +9837,12 @@
   value: true
   mirror: always
 
+# Whether we attempt to generate links in Save As PDF output.
+- name: print.save_as_pdf.links.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
 # The default DPI for printing.
 #
 # For PDF-based output, DPI should ideally be irrelevant, but in fact it is not