gecko-dev/dom/html/HTMLTemplateElement.cpp

/* -*- 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/HTMLTemplateElement.h"
#include "mozilla/dom/HTMLTemplateElementBinding.h"

#include "mozilla/MappedDeclarations.h"
#include "nsGkAtoms.h"
#include "nsStyleConsts.h"
#include "nsAtom.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(Template)

namespace mozilla {
namespace dom {

HTMLTemplateElement::HTMLTemplateElement(
    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
    : nsGenericHTMLElement(std::move(aNodeInfo)) {
  SetHasWeirdParserInsertionMode();

  Document* contentsOwner = OwnerDoc()->GetTemplateContentsOwner();
  if (!contentsOwner) {
    MOZ_CRASH("There should always be a template contents owner.");
  }

  mContent = contentsOwner->CreateDocumentFragment();
  mContent->SetHost(this);
}

HTMLTemplateElement::~HTMLTemplateElement() {
  if (mContent) {
    mContent->SetHost(nullptr);
  }
}

NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLTemplateElement,
                                               nsGenericHTMLElement)

NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLTemplateElement)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLTemplateElement,
                                                nsGenericHTMLElement)
  if (tmp->mContent) {
    tmp->mContent->SetHost(nullptr);
    tmp->mContent = nullptr;
  }
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLTemplateElement,
                                                  nsGenericHTMLElement)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mContent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_ELEMENT_CLONE(HTMLTemplateElement)

JSObject* HTMLTemplateElement::WrapNode(JSContext* aCx,
                                        JS::Handle<JSObject*> aGivenProto) {
  return HTMLTemplateElement_Binding::Wrap(aCx, this, aGivenProto);
}

}  // namespace dom
}  // namespace mozilla