1 files changed, 52 insertions, 0 deletions
diff --git a/dom/xul/XULPersist.h b/dom/xul/XULPersist.h
new file mode 100644
index 0000000000..f389813cb7
--- /dev/null
+++ b/dom/xul/XULPersist.h
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_XULPersist_h
+#define mozilla_dom_XULPersist_h
+
+#include "nsStubDocumentObserver.h"
+
+#ifndef MOZ_NEW_XULSTORE
+#  include "nsCOMPtr.h"
+class nsIXULStore;
+#endif
+
+template <typename T>
+class nsCOMArray;
+
+namespace mozilla::dom {
+
+class XULPersist final : public nsStubDocumentObserver {
+ public:
+  NS_DECL_ISUPPORTS
+
+  explicit XULPersist(Document* aDocument);
+  void Init();
+  void DropDocumentReference();
+
+  NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
+
+ protected:
+  void Persist(mozilla::dom::Element* aElement, nsAtom* aAttribute);
+
+ private:
+  ~XULPersist();
+  nsresult ApplyPersistentAttributes();
+  nsresult ApplyPersistentAttributesToElements(const nsAString& aID,
+                                               const nsAString& aDocURI,
+                                               nsCOMArray<Element>& aElements);
+
+#ifndef MOZ_NEW_XULSTORE
+  nsCOMPtr<nsIXULStore> mLocalStore;
+#endif
+
+  // A weak pointer to our document. Nulled out by DropDocumentReference.
+  Document* MOZ_NON_OWNING_REF mDocument;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_XULPersist_h