1 files changed, 137 insertions, 0 deletions
diff --git a/dom/html/HTMLDetailsElement.cpp b/dom/html/HTMLDetailsElement.cpp
new file mode 100644
index 0000000000..f42c39226e
--- /dev/null
+++ b/dom/html/HTMLDetailsElement.cpp
@@ -0,0 +1,137 @@
+/* -*- 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"
+#include "mozilla/dom/HTMLSummaryElement.h"
+#include "mozilla/dom/ShadowRoot.h"
+#include "mozilla/ScopeExit.h"
+#include "nsContentUtils.h"
+#include "nsTextNode.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Details)
+
+namespace mozilla::dom {
+
+HTMLDetailsElement::~HTMLDetailsElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLDetailsElement)
+
+HTMLDetailsElement::HTMLDetailsElement(already_AddRefed<NodeInfo>&& aNodeInfo)
+    : nsGenericHTMLElement(std::move(aNodeInfo)) {
+  SetupShadowTree();
+}
+
+HTMLSummaryElement* HTMLDetailsElement::GetFirstSummary() const {
+  // XXX: Bug 1245032: Might want to cache the first summary element.
+  for (nsIContent* child = nsINode::GetFirstChild(); child;
+       child = child->GetNextSibling()) {
+    if (auto* summary = HTMLSummaryElement::FromNode(child)) {
+      return summary;
+    }
+  }
+  return nullptr;
+}
+
+void HTMLDetailsElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+                                      const nsAttrValue* aValue,
+                                      const nsAttrValue* aOldValue,
+                                      nsIPrincipal* aMaybeScriptedPrincipal,
+                                      bool aNotify) {
+  if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::open) {
+    bool wasOpen = !!aOldValue;
+    bool isOpen = !!aValue;
+    if (wasOpen != isOpen) {
+      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::AfterSetAttr(
+      aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
+}
+
+void HTMLDetailsElement::SetupShadowTree() {
+  const bool kNotify = false;
+  AttachAndSetUAShadowRoot(NotifyUAWidgetSetup::No);
+  RefPtr<ShadowRoot> sr = GetShadowRoot();
+  if (NS_WARN_IF(!sr)) {
+    return;
+  }
+
+  nsNodeInfoManager* nim = OwnerDoc()->NodeInfoManager();
+  RefPtr<NodeInfo> slotNodeInfo = nim->GetNodeInfo(
+      nsGkAtoms::slot, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
+  {
+    RefPtr<NodeInfo> linkNodeInfo = nim->GetNodeInfo(
+        nsGkAtoms::link, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
+    RefPtr<nsGenericHTMLElement> link =
+        NS_NewHTMLLinkElement(linkNodeInfo.forget());
+    if (NS_WARN_IF(!link)) {
+      return;
+    }
+    link->SetAttr(nsGkAtoms::rel, u"stylesheet"_ns, IgnoreErrors());
+    link->SetAttr(nsGkAtoms::href,
+                  u"resource://content-accessible/details.css"_ns,
+                  IgnoreErrors());
+    sr->AppendChildTo(link, kNotify, IgnoreErrors());
+  }
+  {
+    RefPtr<nsGenericHTMLElement> slot =
+        NS_NewHTMLSlotElement(do_AddRef(slotNodeInfo));
+    if (NS_WARN_IF(!slot)) {
+      return;
+    }
+    slot->SetAttr(kNameSpaceID_None, nsGkAtoms::name,
+                  u"internal-main-summary"_ns, kNotify);
+    sr->AppendChildTo(slot, kNotify, IgnoreErrors());
+
+    RefPtr<NodeInfo> summaryNodeInfo = nim->GetNodeInfo(
+        nsGkAtoms::summary, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
+    RefPtr<nsGenericHTMLElement> summary =
+        NS_NewHTMLSummaryElement(summaryNodeInfo.forget());
+    if (NS_WARN_IF(!summary)) {
+      return;
+    }
+
+    nsAutoString defaultSummaryText;
+    nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
+                                       "DefaultSummary", defaultSummaryText);
+    RefPtr<nsTextNode> description = new (nim) nsTextNode(nim);
+    description->SetText(defaultSummaryText, kNotify);
+    summary->AppendChildTo(description, kNotify, IgnoreErrors());
+
+    slot->AppendChildTo(summary, kNotify, IgnoreErrors());
+  }
+  {
+    RefPtr<nsGenericHTMLElement> slot =
+        NS_NewHTMLSlotElement(slotNodeInfo.forget());
+    if (NS_WARN_IF(!slot)) {
+      return;
+    }
+    sr->AppendChildTo(slot, kNotify, IgnoreErrors());
+  }
+}
+
+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