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

**

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

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** 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

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

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

#include "qboolean_p.h"

#include "qcommonvalues_p.h"

#include "qliteral_p.h"

#include "qatomicstring_p.h"

#include "qsubstringfns_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

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

{

    const Item op1(m_operands.first()->evaluateSingleton(context));

    QString str1;

    if(op1)

        str1 = op1.stringValue();

    const Item op2(m_operands.at(1)->evaluateSingleton(context));

    QString str2;

    if(op2)

        str2 = op2.stringValue();

    if(str2.isEmpty())

        return CommonValues::BooleanTrue;

    if(str1.isEmpty())

        return CommonValues::BooleanFalse;

    return Boolean::fromValue(str1.contains(str2, caseSensitivity()));

}

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

{

    const Item op1(m_operands.first()->evaluateSingleton(context));

    QString str1;

    if(op1)

        str1 = op1.stringValue();

    const Item op2(m_operands.at(1)->evaluateSingleton(context));

    QString str2;

    if(op2)

        str2 = op2.stringValue();

    if(str2.isEmpty())

        return CommonValues::BooleanTrue;

    if(str1.isEmpty())

        return CommonValues::BooleanFalse;

    return Boolean::fromValue(str1.startsWith(str2, caseSensitivity()));

}

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

{

    const Item op1(m_operands.first()->evaluateSingleton(context));

    QString str1;

    if(op1)

        str1 = op1.stringValue();

    const Item op2(m_operands.at(1)->evaluateSingleton(context));

    QString str2;

    if(op2)

        str2 = op2.stringValue();

    if(str2.isEmpty())

        return CommonValues::BooleanTrue;

    if(str1.isEmpty())

        return CommonValues::BooleanFalse;

    return Boolean::fromValue(str1.endsWith(str2, caseSensitivity()));

}

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

{

    const Item op1(m_operands.first()->evaluateSingleton(context));

    QString str1;

    if(op1)

        str1 = op1.stringValue();

    const Item op2(m_operands.at(1)->evaluateSingleton(context));

    QString str2;

    if(op2)

        str2 = op2.stringValue();

    const int pos = str1.indexOf(str2);

    if(pos == -1)

        return CommonValues::EmptyString;

    return AtomicString::fromValue(QString(str1.left(pos)));

}

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

{

    const Item op1(m_operands.first()->evaluateSingleton(context));

    QString str1;

    if(op1)

        str1 = op1.stringValue();

    const Item op2(m_operands.at(1)->evaluateSingleton(context));

    QString str2;

    if(op2)

        str2 = op2.stringValue();

    if(str2.isEmpty())

    {

        if(op1)

            return op1;

        else

            return CommonValues::EmptyString;

    }

    const int pos = str1.indexOf(str2);

    if(pos == -1)

        return CommonValues::EmptyString;

    return AtomicString::fromValue(QString(str1.right(str1.length() - (pos + str2.length()))));

}

QT_END_NAMESPACE