/*

 * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#include "config.h"

#include "MergeIdenticalElementsCommand.h"

#include "Element.h"

namespace WebCore {

MergeIdenticalElementsCommand::MergeIdenticalElementsCommand(PassRefPtr<Element> first, PassRefPtr<Element> second)

    : SimpleEditCommand(first->document())

    , m_element1(first)

    , m_element2(second)

{

    ASSERT(m_element1);

    ASSERT(m_element2);

    ASSERT(m_element1->nextSibling() == m_element2);

}

void MergeIdenticalElementsCommand::doApply()

{

    if (m_element1->nextSibling() != m_element2 || !m_element1->isContentEditable() || !m_element2->isContentEditable())

        return;

    m_atChild = m_element2->firstChild();

    ExceptionCode ec = 0;

    Vector<RefPtr<Node> > children;

    for (Node* child = m_element1->firstChild(); child; child = child->nextSibling())

        children.append(child);

    size_t size = children.size();

    for (size_t i = 0; i < size; ++i)

        m_element2->insertBefore(children[i].release(), m_atChild.get(), ec);

    m_element1->remove(ec);

}

void MergeIdenticalElementsCommand::doUnapply()

{

    ASSERT(m_element1);

    ASSERT(m_element2);

    RefPtr<Node> atChild = m_atChild.release();

    Node* parent = m_element2->parent();

    if (!parent || !parent->isContentEditable())

        return;

    ExceptionCode ec = 0;

    parent->insertBefore(m_element1.get(), m_element2.get(), ec);

    if (ec)

        return;

    Vector<RefPtr<Node> > children;

    for (Node* child = m_element2->firstChild(); child && child != atChild; child = child->nextSibling())

        children.append(child);

    size_t size = children.size();

    for (size_t i = 0; i < size; ++i)

        m_element1->appendChild(children[i].release(), ec);

}

} // namespace WebCore