source: trunk/src/xmlpatterns/functions/qsubstringfns.cpp@ 651

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**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
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** 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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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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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