xref: /external/chromium_org/third_party/WebKit/Source/core/dom/DocumentOrderedList.cpp

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2001 Dirk Mueller (mueller@kde.org)
 *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
 * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 * Copyright (C) 2013 Google 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 "config.h"
#include "core/dom/DocumentOrderedList.h"

#include "core/dom/Node.h"

namespace blink {

void DocumentOrderedList::add(Node* node)
{
    if (m_nodes.isEmpty()) {
        m_nodes.add(node);
        return;
    }

    // Determine an appropriate insertion point.
    iterator begin = m_nodes.begin();
    iterator end = m_nodes.end();
    iterator it = end;
    Node* followingNode = 0;
    do {
        --it;
        Node* n = *it;
        unsigned short position = n->compareDocumentPosition(node, Node::TreatShadowTreesAsComposed);
        if (position & Node::DOCUMENT_POSITION_FOLLOWING) {
            m_nodes.insertBefore(followingNode, node);
            return;
        }
        followingNode = n;
    } while (it != begin);

    m_nodes.insertBefore(followingNode, node);
}

void DocumentOrderedList::parserAdd(Node* node)
{
    ASSERT(m_nodes.isEmpty() || m_nodes.last()->compareDocumentPosition(node, Node::TreatShadowTreesAsComposed) & Node::DOCUMENT_POSITION_FOLLOWING);
    m_nodes.add(node);
}

void DocumentOrderedList::remove(const Node* node)
{
    m_nodes.remove(const_cast<Node*>(node));
}

void DocumentOrderedList::trace(Visitor* visitor)
{
#if ENABLE(OILPAN)
    visitor->trace(m_nodes);
#endif
}

}