/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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.
 *
 */

#include "core/css/resolver/ElementResolveContext.h"

#include "core/dom/LayoutTreeBuilderTraversal.h"
#include "core/dom/Node.h"
#include "core/dom/NodeComputedStyle.h"
#include "core/dom/VisitedLinkState.h"
#include "core/dom/shadow/InsertionPoint.h"

namespace blink {

ElementResolveContext::ElementResolveContext(const Document& document)
    : m_element(nullptr),
      m_parentNode(nullptr),
      m_layoutParent(nullptr),
      m_rootElementStyle(document.documentElement()
                             ? document.documentElement()->computedStyle()
                             : document.computedStyle()),
      m_elementLinkState(EInsideLink::kNotInsideLink),
      m_distributedToInsertionPoint(false) {}

ElementResolveContext::ElementResolveContext(Element& element)
    : m_element(&element),
      m_elementLinkState(
          element.document().visitedLinkState().determineLinkState(element)),
      m_distributedToInsertionPoint(false) {
  LayoutTreeBuilderTraversal::ParentDetails parentDetails;
  if (element.isActiveSlotOrActiveInsertionPoint()) {
    m_parentNode = nullptr;
    m_layoutParent = nullptr;
  } else {
    m_parentNode = LayoutTreeBuilderTraversal::parent(element);
    m_layoutParent =
        LayoutTreeBuilderTraversal::layoutParent(element, &parentDetails);
  }
  m_distributedToInsertionPoint = parentDetails.insertionPoint();

  const Document& document = element.document();
  Node* documentElement = document.documentElement();
  const ComputedStyle* documentStyle = document.computedStyle();
  m_rootElementStyle = documentElement && element != documentElement
                           ? documentElement->computedStyle()
                           : documentStyle;
  if (!m_rootElementStyle)
    m_rootElementStyle = documentStyle;
}

}  // namespace blink