1 files changed, 72 insertions, 0 deletions
diff --git a/dom/html/HTMLDetailsElement.h b/dom/html/HTMLDetailsElement.h
new file mode 100644
index 0000000000..44c38f3d9a
--- /dev/null
+++ b/dom/html/HTMLDetailsElement.h
@@ -0,0 +1,72 @@
+/* -*- 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_HTMLDetailsElement_h
+#define mozilla_dom_HTMLDetailsElement_h
+
+#include "mozilla/AsyncEventDispatcher.h"
+#include "mozilla/Attributes.h"
+#include "nsGenericHTMLElement.h"
+
+namespace mozilla {
+namespace dom {
+
+// HTMLDetailsElement implements the <details> tag, which is used as a
+// disclosure widget from which the user can obtain additional information or
+// controls. Please see the spec for more information.
+// https://html.spec.whatwg.org/multipage/forms.html#the-details-element
+//
+class HTMLDetailsElement final : public nsGenericHTMLElement {
+ public:
+  using NodeInfo = mozilla::dom::NodeInfo;
+
+  explicit HTMLDetailsElement(already_AddRefed<NodeInfo>&& aNodeInfo)
+      : nsGenericHTMLElement(std::move(aNodeInfo)) {}
+
+  NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLDetailsElement, details)
+
+  nsIContent* GetFirstSummary() const;
+
+  nsresult Clone(NodeInfo* aNodeInfo, nsINode** aResult) const override;
+
+  // Element
+  nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,
+                                      int32_t aModType) const override;
+
+  nsresult BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+                         const nsAttrValueOrString* aValue,
+                         bool aNotify) override;
+
+  bool IsInteractiveHTMLContent() const override { return true; }
+
+  // HTMLDetailsElement WebIDL
+  bool Open() const { return GetBoolAttr(nsGkAtoms::open); }
+
+  void SetOpen(bool aOpen, ErrorResult& aError) {
+    SetHTMLBoolAttr(nsGkAtoms::open, aOpen, aError);
+  }
+
+  void ToggleOpen() {
+    ErrorResult rv;
+    SetOpen(!Open(), rv);
+    rv.SuppressException();
+  }
+
+  virtual void AsyncEventRunning(AsyncEventDispatcher* aEvent) override;
+
+ protected:
+  virtual ~HTMLDetailsElement();
+
+  JSObject* WrapNode(JSContext* aCx,
+                     JS::Handle<JSObject*> aGivenProto) override;
+
+  RefPtr<AsyncEventDispatcher> mToggleEventDispatcher;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif /* mozilla_dom_HTMLDetailsElement_h */