1 files changed, 47 insertions, 0 deletions
diff --git a/dom/base/AnonymousContent.cpp b/dom/base/AnonymousContent.cpp
new file mode 100644
index 0000000000..d4e07869dd
--- /dev/null
+++ b/dom/base/AnonymousContent.cpp
@@ -0,0 +1,47 @@
+/* -*- 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 "AnonymousContent.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/ShadowRoot.h"
+#include "mozilla/dom/AnonymousContentBinding.h"
+#include "nsCycleCollectionParticipant.h"
+
+namespace mozilla::dom {
+
+// Ref counting and cycle collection
+NS_IMPL_CYCLE_COLLECTION(AnonymousContent, mHost, mRoot)
+
+already_AddRefed<AnonymousContent> AnonymousContent::Create(Document& aDoc) {
+  RefPtr<Element> host = aDoc.CreateHTMLElement(nsGkAtoms::div);
+  if (!host) {
+    return nullptr;
+  }
+  host->SetAttr(kNameSpaceID_None, nsGkAtoms::role, u"presentation"_ns, false);
+  host->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
+                u"anonymous-content-host"_ns, false);
+  RefPtr<ShadowRoot> root = host->AttachShadowWithoutNameChecks(
+      ShadowRootMode::Closed, Element::DelegatesFocus::No);
+  root->SetIsUAWidget();
+  return do_AddRef(new AnonymousContent(host.forget(), root.forget()));
+}
+
+AnonymousContent::AnonymousContent(already_AddRefed<Element> aHost,
+                                   already_AddRefed<ShadowRoot> aRoot)
+    : mHost(aHost), mRoot(aRoot) {
+  MOZ_ASSERT(mHost);
+  MOZ_ASSERT(mRoot);
+}
+
+AnonymousContent::~AnonymousContent() = default;
+
+bool AnonymousContent::WrapObject(JSContext* aCx,
+                                  JS::Handle<JSObject*> aGivenProto,
+                                  JS::MutableHandle<JSObject*> aReflector) {
+  return AnonymousContent_Binding::Wrap(aCx, this, aGivenProto, aReflector);
+}
+}  // namespace mozilla::dom