1 files changed, 45 insertions, 0 deletions
diff --git a/dom/base/ElementInlines.h b/dom/base/ElementInlines.h
new file mode 100644
index 0000000000..362f5dd478
--- /dev/null
+++ b/dom/base/ElementInlines.h
@@ -0,0 +1,45 @@
+/* -*- 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_ElementInlines_h
+#define mozilla_dom_ElementInlines_h
+
+#include "mozilla/dom/Element.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "nsIContentInlines.h"
+#include "mozilla/dom/Document.h"
+
+namespace mozilla::dom {
+
+inline void Element::RegisterActivityObserver() {
+  OwnerDoc()->RegisterActivityObserver(this);
+}
+
+inline void Element::UnregisterActivityObserver() {
+  OwnerDoc()->UnregisterActivityObserver(this);
+}
+
+}  // namespace mozilla::dom
+
+inline mozilla::dom::Element* nsINode::GetFlattenedTreeParentElement() const {
+  nsINode* parentNode = GetFlattenedTreeParentNode();
+  if MOZ_LIKELY (parentNode && parentNode->IsElement()) {
+    return parentNode->AsElement();
+  }
+
+  return nullptr;
+}
+
+inline mozilla::dom::Element* nsINode::GetFlattenedTreeParentElementForStyle()
+    const {
+  nsINode* parentNode = GetFlattenedTreeParentNodeForStyle();
+  if (MOZ_LIKELY(parentNode && parentNode->IsElement())) {
+    return parentNode->AsElement();
+  }
+  return nullptr;
+}
+
+#endif  // mozilla_dom_ElementInlines_h