1 files changed, 73 insertions, 0 deletions
diff --git a/dom/html/HTMLHeadingElement.h b/dom/html/HTMLHeadingElement.h
new file mode 100644
index 0000000000..192405e0fc
--- /dev/null
+++ b/dom/html/HTMLHeadingElement.h
@@ -0,0 +1,73 @@
+/* -*- 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_HTMLHeadingElement_h
+#define mozilla_dom_HTMLHeadingElement_h
+
+#include "mozilla/Attributes.h"
+#include "nsGenericHTMLElement.h"
+
+namespace mozilla::dom {
+
+class HTMLHeadingElement final : public nsGenericHTMLElement {
+ public:
+  explicit HTMLHeadingElement(
+      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+      : nsGenericHTMLElement(std::move(aNodeInfo)) {
+    MOZ_ASSERT(IsHTMLHeadingElement());
+  }
+
+  bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                      const nsAString& aValue,
+                      nsIPrincipal* aMaybeScriptedPrincipal,
+                      nsAttrValue& aResult) override;
+  NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
+  nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
+  nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
+
+  void SetAlign(const nsAString& aAlign, ErrorResult& aError) {
+    return SetHTMLAttr(nsGkAtoms::align, aAlign, aError);
+  }
+  void GetAlign(DOMString& aAlign) const {
+    return GetHTMLAttr(nsGkAtoms::align, aAlign);
+  }
+
+  int32_t AccessibilityLevel() const {
+    nsAtom* name = NodeInfo()->NameAtom();
+    if (name == nsGkAtoms::h1) {
+      return 1;
+    }
+    if (name == nsGkAtoms::h2) {
+      return 2;
+    }
+    if (name == nsGkAtoms::h3) {
+      return 3;
+    }
+    if (name == nsGkAtoms::h4) {
+      return 4;
+    }
+    if (name == nsGkAtoms::h5) {
+      return 5;
+    }
+    MOZ_ASSERT(name == nsGkAtoms::h6);
+    return 6;
+  }
+
+  NS_IMPL_FROMNODE_HELPER(HTMLHeadingElement, IsHTMLHeadingElement())
+
+ protected:
+  virtual ~HTMLHeadingElement();
+
+  JSObject* WrapNode(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
+
+ private:
+  static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
+                                    MappedDeclarations&);
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_HTMLHeadingElement_h