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Diffstat (limited to 'src/xmlpatterns/functions/qsequencegeneratingfns.cpp')
| -rw-r--r-- | src/xmlpatterns/functions/qsequencegeneratingfns.cpp | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/src/xmlpatterns/functions/qsequencegeneratingfns.cpp b/src/xmlpatterns/functions/qsequencegeneratingfns.cpp new file mode 100644 index 0000000..c77a3e7 --- /dev/null +++ b/src/xmlpatterns/functions/qsequencegeneratingfns.cpp @@ -0,0 +1,304 @@ +/**************************************************************************** +** +** 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 <QStack> +#include <QStringList> + +#include "qanyuri_p.h" +#include "qboolean_p.h" +#include "qcommonsequencetypes_p.h" +#include "qcommonvalues_p.h" +#include "qemptysequence_p.h" +#include "qitemmappingiterator_p.h" +#include "qnodesort_p.h" +#include "qpatternistlocale_p.h" +#include "private/qxmlutils_p.h" + +#include "qsequencegeneratingfns_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +IdFN::IdFN() : m_hasCreatedSorter(false) +{ +} + +Item IdFN::mapToItem(const QString &id, + const IDContext &context) const +{ + return context.second->elementById(context.first->namePool()->allocateQName(QString(), id)); +} + +/** + * @short Helper class for StringSplitter + * + * Needed by the QAbstractXmlForwardIterator sub-class. + * + * @relates StringSplitter + */ +template<> +bool qIsForwardIteratorEnd(const QString &unit) +{ + return unit.isNull(); +} + +/** + * @short Helper class for IdFN. + * + * StringSplitter takes an Iterator which delivers strings of this kind: + * + * "a", "b c", "%invalidNCName", " ", "d" + * + * and we deliver instead: + * + * "a", "b", "c", "d" + * + * That is, we: + * - Remove invalid @c NCName + * - Split IDREFs into individual NCNames + * + * @author Frans Englich + */ +class StringSplitter : public QAbstractXmlForwardIterator<QString> +{ +public: + StringSplitter(const Item::Iterator::Ptr &source); + virtual QString next(); + virtual QString current() const; + virtual qint64 position() const; +private: + QString loadNext(); + const Item::Iterator::Ptr m_source; + QStack<QString> m_buffer; + QString m_current; + qint64 m_position; + bool m_sourceAtEnd; +}; + +StringSplitter::StringSplitter(const Item::Iterator::Ptr &source) : m_source(source) + , m_position(0) + , m_sourceAtEnd(false) +{ + Q_ASSERT(m_source); + m_buffer.push(loadNext()); +} + +QString StringSplitter::next() +{ + /* We also check m_position, we want to load on our first run. */ + if(!m_buffer.isEmpty()) + { + ++m_position; + m_current = m_buffer.pop(); + return m_current; + } + else if(m_sourceAtEnd) + { + m_current.clear(); + m_position = -1; + return QString(); + } + + return loadNext(); +} + +QString StringSplitter::loadNext() +{ + const Item sourceNext(m_source->next()); + + if(sourceNext.isNull()) + { + m_sourceAtEnd = true; + /* We might have strings in m_buffer, let's empty it. */ + return next(); + } + + const QStringList candidates(sourceNext.stringValue().simplified().split(QLatin1Char(' '))); + const int count = candidates.length(); + + for(int i = 0; i < count; ++i) + { + const QString &at = candidates.at(i); + + if(QXmlUtils::isNCName(at)) + m_buffer.push(at); + } + + /* So, now we have populated m_buffer, let's start from the beginning. */ + return next(); +} + +QString StringSplitter::current() const +{ + return m_current; +} + +qint64 StringSplitter::position() const +{ + return m_position; +} + +Item::Iterator::Ptr IdFN::evaluateSequence(const DynamicContext::Ptr &context) const +{ + const Item::Iterator::Ptr idrefs(m_operands.first()->evaluateSequence(context)); + const Item node(m_operands.last()->evaluateSingleton(context)); + + checkTargetNode(node.asNode(), context, ReportContext::FODC0001); + + return makeItemMappingIterator<Item, + QString, + IdFN::ConstPtr, + IDContext>(ConstPtr(this), + StringSplitter::Ptr(new StringSplitter(idrefs)), + qMakePair(context, node.asNode().model())); +} + +Expression::Ptr IdFN::typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType) +{ + if(m_hasCreatedSorter) + return FunctionCall::typeCheck(context, reqType); + else + { + const Expression::Ptr newMe(new NodeSortExpression(Expression::Ptr(this))); + context->wrapExpressionWith(this, newMe); + m_hasCreatedSorter = true; + return newMe->typeCheck(context, reqType); + } +} + +Item::Iterator::Ptr IdrefFN::evaluateSequence(const DynamicContext::Ptr &context) const +{ + const Item::Iterator::Ptr ids(m_operands.first()->evaluateSequence(context)); + + Item mId(ids->next()); + if(!mId) + return CommonValues::emptyIterator; + + const Item node(m_operands.last()->evaluateSingleton(context)); + checkTargetNode(node.asNode(), context, ReportContext::FODC0001); + + return CommonValues::emptyIterator; /* TODO Haven't implemented further. */ +} + +Item DocFN::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item itemURI(m_operands.first()->evaluateSingleton(context)); + + if(!itemURI) + return Item(); + + /* These two lines were previously in a separate function but are now duplicated + * in DocAvailableFN::evaluateEBV() and DocFN::typeCheck(), + * as part of a workaround for solaris-cc-64. DocFN::typeCheck() is in qsequencefns.cpp + * as part of that workaround. */ + const QUrl mayRela(AnyURI::toQUrl<ReportContext::FODC0005>(itemURI.stringValue(), context, this)); + const QUrl uri(context->resolveURI(mayRela, staticBaseURI())); + + Q_ASSERT(uri.isValid()); + Q_ASSERT(!uri.isRelative()); + + const Item doc(context->resourceLoader()->openDocument(uri, context)); + + return doc; +} + +SequenceType::Ptr DocFN::staticType() const +{ + if(m_type) + return m_type; + else + return CommonSequenceTypes::ZeroOrOneDocumentNode; +} + +bool DocAvailableFN::evaluateEBV(const DynamicContext::Ptr &context) const +{ + const Item itemURI(m_operands.first()->evaluateSingleton(context)); + + /* 15.5.4 fn:doc reads: "If $uri is the empty sequence, the result is an empty sequence." + * Hence, we return false for the empty sequence, because this doesn't hold true: + * "If this function returns true, then calling fn:doc($uri) within + * the same execution scope must return a document node."(15.5.5 fn:doc-available) */ + if(!itemURI) + return false; + + /* These two lines are duplicated in DocFN::evaluateSingleton(), as part + * of a workaround for solaris-cc-64. */ + const QUrl mayRela(AnyURI::toQUrl<ReportContext::FODC0005>(itemURI.stringValue(), context, this)); + const QUrl uri(context->resolveURI(mayRela, staticBaseURI())); + + Q_ASSERT(!uri.isRelative()); + return context->resourceLoader()->isDocumentAvailable(uri); +} + +Item::Iterator::Ptr CollectionFN::evaluateSequence(const DynamicContext::Ptr &context) const +{ + // TODO resolve with URI resolve + if(m_operands.isEmpty()) + { + // TODO check default collection + context->error(QtXmlPatterns::tr("The default collection is undefined"), + ReportContext::FODC0002, this); + return CommonValues::emptyIterator; + } + else + { + const Item itemURI(m_operands.first()->evaluateSingleton(context)); + + if(itemURI) + { + const QUrl uri(AnyURI::toQUrl<ReportContext::FODC0004>(itemURI.stringValue(), context, this)); + + // TODO 2. Resolve against static context base URI(store base URI at compile time) + context->error(QtXmlPatterns::tr("%1 cannot be retrieved").arg(formatResourcePath(uri)), + ReportContext::FODC0004, this); + return CommonValues::emptyIterator; + } + else + { + /* This is out default collection currently, */ + return CommonValues::emptyIterator; + } + } +} + +QT_END_NAMESPACE |