/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2001 Dirk Mueller (mueller@kde.org)
 *           (C) 2008 David Smith (catfish.man@gmail.com)
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef NodeComputedStyle_h
#define NodeComputedStyle_h

#include "core/dom/Element.h"
#include "core/dom/LayoutTreeBuilderTraversal.h"
#include "core/dom/Node.h"
#include "core/dom/shadow/InsertionPoint.h"
#include "core/html/HTMLOptGroupElement.h"
#include "core/layout/LayoutObject.h"

namespace blink {

inline const ComputedStyle* Node::computedStyle() const {
  return mutableComputedStyle();
}

inline ComputedStyle* Node::mutableComputedStyle() const {
  if (LayoutObject* layoutObject = this->layoutObject())
    return layoutObject->mutableStyle();

  if (isElementNode())
    return toElement(this)->mutableNonLayoutObjectComputedStyle();

  return 0;
}

inline const ComputedStyle* Node::parentComputedStyle() const {
  if (isActiveSlotOrActiveInsertionPoint())
    return 0;
  ContainerNode* parent = LayoutTreeBuilderTraversal::parent(*this);
  return parent ? parent->computedStyle() : 0;
}

inline const ComputedStyle& Node::computedStyleRef() const {
  const ComputedStyle* style = computedStyle();
  DCHECK(style);
  return *style;
}

}  // namespace blink
#endif  // NodeComputedStyle_h