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Diffstat (limited to 'src/xmlpatterns/functions/qstringvaluefns.cpp')
| -rw-r--r-- | src/xmlpatterns/functions/qstringvaluefns.cpp | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/src/xmlpatterns/functions/qstringvaluefns.cpp b/src/xmlpatterns/functions/qstringvaluefns.cpp new file mode 100644 index 0000000..d57dd4c --- /dev/null +++ b/src/xmlpatterns/functions/qstringvaluefns.cpp @@ -0,0 +1,373 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qabstractfloat_p.h" +#include "qatomicstring_p.h" +#include "qcommonsequencetypes_p.h" +#include "qcommonvalues_p.h" +#include "qinteger_p.h" +#include "qliteral_p.h" +#include "qpatternistlocale_p.h" +#include "qschemanumeric_p.h" + +#include "qstringvaluefns_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +Item ConcatFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Expression::List::const_iterator end(m_operands.constEnd()); + Expression::List::const_iterator it(m_operands.constBegin()); + QString result; + + for(; it != end; ++it) + { + Item item((*it)->evaluateSingleton(context)); + + if(item) + result += item.stringValue(); + } + + return AtomicString::fromValue(result); +} + +Item StringJoinFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context)); + Q_ASSERT(it); + Item current(it->next()); + + if(!current) /* Exit early, don't evaluate the separator. */ + return CommonValues::EmptyString; + + QString result; + QString separator; + const Item isep(m_operands.at(1)->evaluateSingleton(context)); + + if(isep) + separator = isep.stringValue(); + + while(true) + { + result += current.stringValue(); + current = it->next(); + + if(!current) + break; + + result += separator; + } + + return result.isEmpty() + ? toItem(CommonValues::EmptyString) + : toItem(AtomicString::fromValue(result)); +} + +Expression::Ptr StringJoinFN::compress(const StaticContext::Ptr &context) +{ + if(m_operands.first()->staticType()->cardinality().allowsMany()) + return FunctionCall::compress(context); + else + { + if(m_operands.first()->is(IDEmptySequence)) + return wrapLiteral(CommonValues::EmptyString, context, this); + else + return m_operands.first()->compress(context); + } +} + +Item SubstringFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + Item item(m_operands.first()->evaluateSingleton(context)); + + if(!item) + return CommonValues::EmptyString; + + const QString str(item.stringValue()); + + const xsDouble dblStart = m_operands.at(1)->evaluateSingleton(context).as<Numeric>() + ->round()->toDouble(); + if(qIsNaN(dblStart)) + return CommonValues::EmptyString; + + /* XPath starts from 1, but C++ starts from 0. */ + xsInteger startingLoc = Double::fromValue(dblStart)->round()->toInteger() - 1; + + xsInteger length = 0; + if(m_operands.count() == 2) + length = str.length() - startingLoc; + else + { + const xsDouble dblLen = m_operands.at(2)->evaluateSingleton(context).as<Numeric>() + ->round()->toDouble(); + + if(qIsNaN(dblLen)) + return CommonValues::EmptyString; + + length = Double::fromValue(dblLen)->round()->toInteger(); + if(startingLoc > startingLoc + length) + return CommonValues::EmptyString; + } + + if(startingLoc < 0) + { + length = length + startingLoc; + startingLoc = 0; + } + + return AtomicString::fromValue(str.mid(startingLoc, length)); +} + +Item StringLengthFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item item(m_operands.first()->evaluateSingleton(context)); + + /* fn:string() is re-implemented "inline" here. */ + if(item) + return Integer::fromValue(item.stringValue().length()); + else + return CommonValues::IntegerZero; +} + +NormalizeUnicodeFN::NormalizeUnicodeFN() : m_normForm(QString::NormalizationForm_C) +{ +} + +Item NormalizeSpaceFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item arg(m_operands.first()->evaluateSingleton(context)); + + if(!arg) + return CommonValues::EmptyString; + + return toItem(AtomicString::fromValue(arg.stringValue().simplified())); +} + +Item NormalizeUnicodeFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item arg(m_operands.first()->evaluateSingleton(context)); + + if(!arg) + return CommonValues::EmptyString; + + int normForm; + + /* The second argument has been removed, if we've already determined the form. */ + if(m_operands.count() == 1) + normForm = m_normForm; + else + { + normForm = determineNormalizationForm(context); + if(normForm == -1) + return toItem(AtomicString::fromValue(arg.stringValue())); + } + + return AtomicString::fromValue(arg.stringValue().normalized( + static_cast<QString::NormalizationForm>(normForm))); +} + +Expression::Ptr NormalizeUnicodeFN::compress(const StaticContext::Ptr &context) +{ + const Expression::Ptr me(FunctionCall::compress(context)); + if(me != this) + return me; + + Q_ASSERT(m_operands.count() == 1 || m_operands.count() == 2); + + if(m_operands.count() == 1) + m_normForm = QString::NormalizationForm_C; + else if(m_operands.last()->is(IDStringValue)) + { + m_normForm = static_cast<QString::NormalizationForm>( + determineNormalizationForm(context->dynamicContext())); + + if(m_normForm == -1) + return m_operands.first(); + + /* Remove the operand since we don't need it anymore. */ + m_operands.removeLast(); + } + + return me; +} + +int NormalizeUnicodeFN::determineNormalizationForm(const DynamicContext::Ptr &context) const +{ + const QString strRepr(m_operands.last()->evaluateSingleton(context).stringValue().trimmed().toUpper()); + + /* TODO. Put these values in a QHash for faster lookup. Keep thread safety in mind. */ + if(strRepr.isEmpty()) + return -1; + else if(strRepr == QLatin1String("NFC")) + return QString::NormalizationForm_C; + else if(strRepr == QLatin1String("NFD")) + return QString::NormalizationForm_D; + else if(strRepr == QLatin1String("NFKC")) + return QString::NormalizationForm_KC; + else if(strRepr == QLatin1String("NFKD")) + return QString::NormalizationForm_KD; + else + { + /* What form is FULLY_NORMALIZED? Is a code path available for that somewhere? */ + context->error(QtXmlPatterns::tr("The normalization form %1 is " + "unsupported. The supported forms are " + "%2, %3, %4, and %5, and none, i.e. " + "the empty string (no normalization).") + .arg(formatKeyword(strRepr)) + .arg(formatKeyword("NFC")) + .arg(formatKeyword("NFD")) + .arg(formatKeyword("NFKC")) + .arg(formatKeyword("NFKD")), + ReportContext::FOCH0003, + this); + return QString::NormalizationForm_C; /* Silence compiler warning. */ + } +} + +Item UpperCaseFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item item(m_operands.first()->evaluateSingleton(context)); + + if(!item) + return CommonValues::EmptyString; + + return AtomicString::fromValue(item.stringValue().toUpper()); +} + +Item LowerCaseFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item item(m_operands.first()->evaluateSingleton(context)); + + if(!item) + return CommonValues::EmptyString; + + return AtomicString::fromValue(item.stringValue().toLower()); +} + +Item TranslateFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item item(m_operands.first()->evaluateSingleton(context)); + + if(!item) + return CommonValues::EmptyString; + + const QString mapString(m_operands.at(1)->evaluateSingleton(context).stringValue()); + const QString arg(item.stringValue()); + + if(mapString.isEmpty()) + return AtomicString::fromValue(arg); + + const QString transString(m_operands.at(2)->evaluateSingleton(context).stringValue()); + const int transLen = transString.length(); + const int argLen = arg.length(); + + QString result; + result.reserve(argLen); + int outI = 0; + + for(int i = 0; i < argLen; ++i) + { + const QChar argCh(arg.at(i)); + const int mapPos = mapString.indexOf(argCh); + + if(mapPos == -1) + { + result[outI] = argCh; + ++outI; + continue; + } + else if(mapPos >= transLen) + continue; + + const QChar transCh(transString.at(mapPos)); + + if(transCh.isNull()) + continue; + + result[outI] = transCh; + ++outI; + } + + result.truncate(outI); + return AtomicString::fromValue(result); +} + +EncodeString::EncodeString(const QByteArray &excludeChars, + const QByteArray &includeChars) : m_excludeChars(excludeChars), + m_includeChars(includeChars) +{ +} + +Item EncodeString::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item item(m_operands.first()->evaluateSingleton(context)); + + if(!item) + return CommonValues::EmptyString; + + return AtomicString::fromValue(QString::fromAscii(QUrl::toPercentEncoding(item.stringValue(), + m_excludeChars, + m_includeChars).constData())); +} + +const char *const EncodeForURIFN::include = "#!*'()"; + +EncodeForURIFN::EncodeForURIFN() : EncodeString(QByteArray(), QByteArray::fromRawData(include, 6)) +{ +} + +const char *const IriToURIFN::exclude = "#-_!~*'();?@&=+$,[]/:%"; + +IriToURIFN::IriToURIFN() : EncodeString(QByteArray::fromRawData(exclude, 22), QByteArray()) +{ +} + +const char *const EscapeHtmlURIFN::include = "?&[]%"; +const char *const EscapeHtmlURIFN::exclude = " :;=@!./+*()-,#$'"; + +EscapeHtmlURIFN::EscapeHtmlURIFN() : EncodeString(QByteArray::fromRawData(exclude, 17), + QByteArray::fromRawData(include, 6)) +{ +} + +QT_END_NAMESPACE |