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

**

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

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

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** contained in the Technology Preview License Agreement accompanying

** this package.

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

#include "qatomiccomparator_p.h"

#include "qcommonvalues_p.h"

#include "qschemadatetime_p.h"

#include "qdaytimeduration_p.h"

#include "qdecimal_p.h"

#include "qinteger_p.h"

#include "qpatternistlocale_p.h"

#include "qdatetimefn_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

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

{

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

    if(!di)

        return Item();

    const Item ti(m_operands.last()->evaluateSingleton(context));

    if(!ti)

        return Item();

    QDateTime date(di.as<AbstractDateTime>()->toDateTime());

    Q_ASSERT(date.isValid());

    QDateTime time(ti.as<AbstractDateTime>()->toDateTime());

    Q_ASSERT(time.isValid());

    if(date.timeSpec() == time.timeSpec() || /* Identical timezone properties. */

       time.timeSpec() == Qt::LocalTime) /* time has no timezone, but date do. */

    {

        date.setTime(time.time());

        Q_ASSERT(date.isValid());

        return DateTime::fromDateTime(date);

    }

    else if(date.timeSpec() == Qt::LocalTime) /* date has no timezone, but time do. */

    {

        time.setDate(date.date());

        Q_ASSERT(time.isValid());

        return DateTime::fromDateTime(time);

    }

    else

    {

        context->error(QtXmlPatterns::tr("If both values have zone offsets, "

                                         "they must have the same zone offset. "

                                         "%1 and %2 are not the same.")

                       .arg(formatData(di.stringValue()),

                            formatData(di.stringValue())),

                       ReportContext::FORG0008, this);

        return Item(); /* Silence GCC warning. */

    }

}

QT_END_NAMESPACE