dom/base/AnonymousContent.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "AnonymousContent.h"
   8 #include "mozilla/dom/Document.h"
   9 #include "mozilla/dom/Element.h"
  10 #include "mozilla/dom/ShadowRoot.h"
  11 #include "mozilla/dom/AnonymousContentBinding.h"
  12 #include "nsCycleCollectionParticipant.h"
  13
  14 namespace mozilla::dom {
  15
  16 // Ref counting and cycle collection
  17 NS_IMPL_CYCLE_COLLECTION(AnonymousContent, mHost, mRoot)
  18
  19 already_AddRefed<AnonymousContent> AnonymousContent::Create(Document& aDoc) {
  20   RefPtr<Element> host = aDoc.CreateHTMLElement(nsGkAtoms::div);
  21   if (!host) {
  22     return nullptr;
  23   }
  24   host->SetAttr(kNameSpaceID_None, nsGkAtoms::role, u"presentation"_ns, false);
  25   host->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
  26                 u"anonymous-content-host"_ns, false);
  27   RefPtr<ShadowRoot> root = host->AttachShadowWithoutNameChecks(
  28       ShadowRootMode::Closed, Element::DelegatesFocus::No);
  29   root->SetIsUAWidget();
  30   return do_AddRef(new AnonymousContent(host.forget(), root.forget()));
  31 }
  32
  33 AnonymousContent::AnonymousContent(already_AddRefed<Element> aHost,
  34                                    already_AddRefed<ShadowRoot> aRoot)
  35     : mHost(aHost), mRoot(aRoot) {
  36   MOZ_ASSERT(mHost);
  37   MOZ_ASSERT(mRoot);
  38 }
  39
  40 AnonymousContent::~AnonymousContent() = default;
  41
  42 bool AnonymousContent::WrapObject(JSContext* aCx,
  43                                   JS::Handle<JSObject*> aGivenProto,
  44                                   JS::MutableHandle<JSObject*> aReflector) {
  45   return AnonymousContent_Binding::Wrap(aCx, this, aGivenProto, aReflector);
  46 }
  47 }  // namespace mozilla::dom