/*

 * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>

 * Copyright (C) 2006, 2009 Apple Inc.

 *

 * 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 THE AUTHOR ``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 THE AUTHOR 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 "XPathUtil.h"

#if ENABLE(XPATH)

#include "ContainerNode.h"

namespace WebCore {

namespace XPath {

bool isRootDomNode(Node* node)

{

    return node && !node->parentNode();

}

String stringValue(Node* node)

{

    switch (node->nodeType()) {

        case Node::ATTRIBUTE_NODE:

        case Node::PROCESSING_INSTRUCTION_NODE:

        case Node::COMMENT_NODE:

        case Node::TEXT_NODE:

        case Node::CDATA_SECTION_NODE:

        case Node::XPATH_NAMESPACE_NODE:

            return node->nodeValue();

        default:

            if (isRootDomNode(node) || node->nodeType() == Node::ELEMENT_NODE) {

                Vector<UChar> result;

                result.reserveCapacity(1024);

                for (Node* n = node->firstChild(); n; n = n->traverseNextNode(node)) {

                    if (n->isTextNode()) {

                        const String& nodeValue = n->nodeValue();

                        result.append(nodeValue.characters(), nodeValue.length());

                    }

                }

                return String::adopt(result);

            }

    }

    return String();

}

bool isValidContextNode(Node* node)

{

    if (!node)

        return false;

    switch (node->nodeType()) {

        case Node::ATTRIBUTE_NODE:

        case Node::CDATA_SECTION_NODE:

        case Node::COMMENT_NODE:

        case Node::DOCUMENT_NODE:

        case Node::ELEMENT_NODE:

        case Node::PROCESSING_INSTRUCTION_NODE:

        case Node::XPATH_NAMESPACE_NODE:

            return true;

        case Node::DOCUMENT_FRAGMENT_NODE:

        case Node::DOCUMENT_TYPE_NODE:

        case Node::ENTITY_NODE:

        case Node::ENTITY_REFERENCE_NODE:

        case Node::NOTATION_NODE:

            return false;

        case Node::TEXT_NODE:

            return !(node->parentNode() && node->parentNode()->isAttributeNode());

    }

    ASSERT_NOT_REACHED();

    return false;

}

}

}

#endif // ENABLE(XPATH)