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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** 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
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QStringList>
#include "qboolean_p.h"
#include "qcommonvalues_p.h"
#include "qitemmappingiterator_p.h"
#include "qpatternistlocale_p.h"
#include "qatomicstring_p.h"
#include "qpatternmatchingfns_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
MatchesFN::MatchesFN() : PatternPlatform(2)
{
}
Item MatchesFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
const QRegExp regexp(pattern(context));
QString input;
const Item arg(m_operands.first()->evaluateSingleton(context));
if(arg)
input = arg.stringValue();
return Boolean::fromValue(input.contains(regexp));
}
ReplaceFN::ReplaceFN() : PatternPlatform(3)
{
}
Item ReplaceFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
const QRegExp regexp(pattern(context));
QString input;
const Item arg(m_operands.first()->evaluateSingleton(context));
if(arg)
input = arg.stringValue();
const QString replacement(m_replacementString.isNull() ? parseReplacement(regexp.numCaptures(), context)
: m_replacementString);
return AtomicString::fromValue(input.replace(regexp, replacement));
}
QString ReplaceFN::errorAtEnd(const char ch)
{
return QtXmlPatterns::tr("%1 must be followed by %2 or %3, not at "
"the end of the replacement string.")
.arg(formatKeyword(QLatin1Char(ch)))
.arg(formatKeyword(QLatin1Char('\\')))
.arg(formatKeyword(QLatin1Char('$')));
}
QString ReplaceFN::parseReplacement(const int,
const DynamicContext::Ptr &context) const
{
// TODO what if there is no groups, can one rewrite to the replacement then?
const QString input(m_operands.at(2)->evaluateSingleton(context).stringValue());
QString retval;
retval.reserve(input.size());
const int len = input.length();
for(int i = 0; i < len; ++i)
{
const QChar ch(input.at(i));
switch(ch.toAscii())
{
case '$':
{
/* QRegExp uses '\' as opposed to '$' for marking sub groups. */
retval.append(QLatin1Char('\\'));
++i;
if(i == len)
{
context->error(errorAtEnd('$'), ReportContext::FORX0004, this);
return QString();
}
const QChar nextCh(input.at(i));
if(nextCh.isDigit())
retval.append(nextCh);
else
{
context->error(QtXmlPatterns::tr("In the replacement string, %1 must be "
"followed by at least one digit when not escaped.")
.arg(formatKeyword(QLatin1Char('$'))),
ReportContext::FORX0004, this);
return QString();
}
break;
}
case '\\':
{
++i;
if(i == len)
{
/* error, we've reached the end. */;
context->error(errorAtEnd('\\'), ReportContext::FORX0004, this);
}
const QChar nextCh(input.at(i));
if(nextCh == QLatin1Char('\\') || nextCh == QLatin1Char('$'))
{
retval.append(ch);
break;
}
else
{
context->error(QtXmlPatterns::tr("In the replacement string, %1 can only be used to "
"escape itself or %2, not %3")
.arg(formatKeyword(QLatin1Char('\\')))
.arg(formatKeyword(QLatin1Char('$')))
.arg(formatKeyword(nextCh)),
ReportContext::FORX0004, this);
return QString();
}
}
default:
retval.append(ch);
}
}
return retval;
}
Expression::Ptr ReplaceFN::compress(const StaticContext::Ptr &context)
{
const Expression::Ptr me(PatternPlatform::compress(context));
if(me != this)
return me;
if(m_operands.at(2)->is(IDStringValue))
{
const int capt = captureCount();
if(capt == -1)
return me;
else
m_replacementString = parseReplacement(captureCount(), context->dynamicContext());
}
return me;
}
TokenizeFN::TokenizeFN() : PatternPlatform(2)
{
}
/**
* Used by QAbstractXmlForwardIterator.
*/
static inline bool qIsForwardIteratorEnd(const QString &item)
{
return item.isNull();
}
Item TokenizeFN::mapToItem(const QString &subject, const DynamicContext::Ptr &) const
{
return AtomicString::fromValue(subject);
}
Item::Iterator::Ptr TokenizeFN::evaluateSequence(const DynamicContext::Ptr &context) const
{
const Item arg(m_operands.first()->evaluateSingleton(context));
if(!arg)
return CommonValues::emptyIterator;
const QString input(arg.stringValue());
if(input.isEmpty())
return CommonValues::emptyIterator;
const QRegExp regExp(pattern(context));
const QStringList result(input.split(regExp, QString::KeepEmptyParts));
return makeItemMappingIterator<Item>(ConstPtr(this),
makeListIterator(result),
DynamicContext::Ptr());
}
QT_END_NAMESPACE
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