/* -*- 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/. */

#ifndef DocumentStyleRootIterator_h

#define DocumentStyleRootIterator_h

#include "nsTArray.h"

class nsIContent;

class nsIDocument;

class nsINode;

namespace mozilla {

namespace dom {

class Element;

} // namespace dom

/**

 * DocumentStyleRootIterator traverses the roots of the document from the

 * perspective of the Servo-backed style system. In the general case, this

 * will first traverse the document root, followed by any document level

 * native anonymous content.

 *

 * If the caller passes an element to the constructor rather than the document,

 * that element (and nothing else) is returned from GetNextStyleRoot.

 */

class DocumentStyleRootIterator

{

public:

  explicit DocumentStyleRootIterator(nsINode* aStyleRoot);

  ~DocumentStyleRootIterator() { MOZ_COUNT_DTOR(DocumentStyleRootIterator); }

  dom::Element* GetNextStyleRoot();

private:

  AutoTArray<nsIContent*, 8> mStyleRoots;

  uint32_t mPosition;

};

} // namespace mozilla

#endif // DocumentStyleRootIterator_h