/**************************************************************************** ** ** 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 #include #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 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 { 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 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(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(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(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(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