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Diffstat (limited to 'src/xmlpatterns/functions/qpatternmatchingfns.cpp')
| -rw-r--r-- | src/xmlpatterns/functions/qpatternmatchingfns.cpp | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/xmlpatterns/functions/qpatternmatchingfns.cpp b/src/xmlpatterns/functions/qpatternmatchingfns.cpp new file mode 100644 index 0000000..ca14d9b --- /dev/null +++ b/src/xmlpatterns/functions/qpatternmatchingfns.cpp @@ -0,0 +1,230 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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 <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.captureCount(), 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 |