/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtXmlPatterns module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qanyuri_p.h"

#include "qboolean_p.h"

#include "qbuiltintypes_p.h"

#include "qcommonvalues_p.h"

#include "qliteral_p.h"

#include "qitem_p.h"

#include "qqnamevalue_p.h"

#include "qatomicstring_p.h"

#include "qaccessorfns_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item NodeNameFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item item(m_operands.first()->evaluateSingleton(context));

    if(item)

    {

        const QXmlName name(item.asNode().name());

        if(name.isNull())

            return Item();

        else

            return toItem(QNameValue::fromValue(context->namePool(), name));

    }

    else

        return Item();

}

Item NilledFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item item(m_operands.first()->evaluateSingleton(context));

    if(item && item.asNode().kind() == QXmlNodeModelIndex::Element)

    {

        /* We have no access to the PSVI -- always return false. */

        return CommonValues::BooleanFalse;

    }

    else

        return Item();

}

Item StringFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item item(m_operands.first()->evaluateSingleton(context));

    if(item)

        return AtomicString::fromValue(item.stringValue());

    else

        return CommonValues::EmptyString;

}

Expression::Ptr StringFN::typeCheck(const StaticContext::Ptr &context,

                                    const SequenceType::Ptr &reqType)

{

    const Expression::Ptr me(FunctionCall::typeCheck(context, reqType));

    if(me != this)

        return me;

    if(BuiltinTypes::xsString->xdtTypeMatches(m_operands.first()->staticType()->itemType()))

        return m_operands.first(); /* No need for string(), it's already a string. */

    else

        return me;

}

Item BaseURIFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item node(m_operands.first()->evaluateSingleton(context));

    if(node)

    {

        const QUrl base(node.asNode().baseUri());

        if(base.isEmpty())

            return Item();

        else if(base.isValid())

        {

            Q_ASSERT_X(!base.isRelative(), Q_FUNC_INFO,

                       "The base URI must be absolute.");

            return toItem(AnyURI::fromValue(base));

        }

        else

            return Item();

    }

    else

        return Item();

}

Item DocumentURIFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item node(m_operands.first()->evaluateSingleton(context));

    if(node)

    {

        const QUrl documentURI(node.asNode().documentUri());

        if(documentURI.isValid())

        {

            if(documentURI.isEmpty())

                return Item();

            else

            {

                Q_ASSERT_X(!documentURI.isRelative(), Q_FUNC_INFO,

                           "The document URI must be absolute.");

                return toItem(AnyURI::fromValue(documentURI));

            }

        }

        else

            return Item();

    }

    else

        return Item();

}

QT_END_NAMESPACE