1 files changed, 72 insertions, 0 deletions
diff --git a/dom/html/HTMLDetailsElement.cpp b/dom/html/HTMLDetailsElement.cpp
new file mode 100644
index 0000000000..282eb71299
--- /dev/null
+++ b/dom/html/HTMLDetailsElement.cpp
@@ -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/. */
+
+#include "mozilla/dom/HTMLDetailsElement.h"
+
+#include "mozilla/dom/HTMLDetailsElementBinding.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Details)
+
+namespace mozilla::dom {
+
+HTMLDetailsElement::~HTMLDetailsElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLDetailsElement)
+
+nsIContent* HTMLDetailsElement::GetFirstSummary() const {
+  // XXX: Bug 1245032: Might want to cache the first summary element.
+  for (nsIContent* child = nsINode::GetFirstChild(); child;
+       child = child->GetNextSibling()) {
+    if (child->IsHTMLElement(nsGkAtoms::summary)) {
+      return child;
+    }
+  }
+  return nullptr;
+}
+
+nsChangeHint HTMLDetailsElement::GetAttributeChangeHint(
+    const nsAtom* aAttribute, int32_t aModType) const {
+  nsChangeHint hint =
+      nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
+  if (aAttribute == nsGkAtoms::open) {
+    hint |= nsChangeHint_ReconstructFrame;
+  }
+  return hint;
+}
+
+nsresult HTMLDetailsElement::BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+                                           const nsAttrValueOrString* aValue,
+                                           bool aNotify) {
+  if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::open) {
+    bool setOpen = aValue != nullptr;
+    if (Open() != setOpen) {
+      if (mToggleEventDispatcher) {
+        mToggleEventDispatcher->Cancel();
+      }
+      // According to the html spec, a 'toggle' event is a simple event which
+      // does not bubble.
+      mToggleEventDispatcher =
+          new AsyncEventDispatcher(this, u"toggle"_ns, CanBubble::eNo);
+      mToggleEventDispatcher->PostDOMEvent();
+    }
+  }
+
+  return nsGenericHTMLElement::BeforeSetAttr(aNameSpaceID, aName, aValue,
+                                             aNotify);
+}
+
+void HTMLDetailsElement::AsyncEventRunning(AsyncEventDispatcher* aEvent) {
+  if (mToggleEventDispatcher == aEvent) {
+    mToggleEventDispatcher = nullptr;
+  }
+}
+
+JSObject* HTMLDetailsElement::WrapNode(JSContext* aCx,
+                                       JS::Handle<JSObject*> aGivenProto) {
+  return HTMLDetailsElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom