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Diffstat (limited to 'src/xmlpatterns/expr/qelementconstructor.cpp')
| -rw-r--r-- | src/xmlpatterns/expr/qelementconstructor.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qelementconstructor.cpp b/src/xmlpatterns/expr/qelementconstructor.cpp new file mode 100644 index 0000000000..57da1aca16 --- /dev/null +++ b/src/xmlpatterns/expr/qelementconstructor.cpp @@ -0,0 +1,160 @@ +/**************************************************************************** +** +** 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 "qcommonsequencetypes_p.h" +#include "qdelegatingnamespaceresolver_p.h" +#include "qnamespaceconstructor_p.h" +#include "qnodebuilder_p.h" +#include "qoutputvalidator_p.h" +#include "qqnamevalue_p.h" +#include "qstaticnamespacecontext_p.h" + +#include "qelementconstructor_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +ElementConstructor::ElementConstructor(const Expression::Ptr &op1, + const Expression::Ptr &op2, + const bool isXSLT) : PairContainer(op1, op2) + , m_isXSLT(isXSLT) +{ +} + +Item ElementConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + const Item name(m_operand1->evaluateSingleton(context)); + + const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(m_staticBaseURI)); + OutputValidator validator(nodeBuilder.data(), context, this, m_isXSLT); + + const DynamicContext::Ptr receiverContext(context->createReceiverContext(&validator)); + + nodeBuilder->startElement(name.as<QNameValue>()->qName()); + m_operand2->evaluateToSequenceReceiver(receiverContext); + nodeBuilder->endElement(); + + const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument()); + context->addNodeModel(nm); + + return nm->root(QXmlNodeModelIndex()); +} + +void ElementConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const +{ + /* We create an OutputValidator here too. If we're serializing(a common + * case, unfortunately) the receiver is already validating in order to + * catch cases where a computed attribute constructor is followed by an + * element constructor, but in the cases where we're not serializing it's + * necessary that we validate in this step. */ + const Item name(m_operand1->evaluateSingleton(context)); + QAbstractXmlReceiver *const receiver = context->outputReceiver(); + + OutputValidator validator(receiver, context, this, m_isXSLT); + const DynamicContext::Ptr receiverContext(context->createReceiverContext(&validator)); + + receiver->startElement(name.as<QNameValue>()->qName()); + m_operand2->evaluateToSequenceReceiver(receiverContext); + receiver->endElement(); +} + +Expression::Ptr ElementConstructor::typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType) +{ + /* What does this code do? When type checking our children, our namespace + * bindings, which are also children of the form of NamespaceConstructor + * instances, must be statically in-scope for them, so find them and + * shuffle their bindings into the StaticContext. */ + + m_staticBaseURI = context->baseURI(); + + /* Namespace declarations changes the in-scope bindings, so let's + * first lookup our child NamespaceConstructors. */ + const ID operandID = m_operand2->id(); + + NamespaceResolver::Bindings overrides; + if(operandID == IDExpressionSequence) + { + const Expression::List operands(m_operand2->operands()); + const int len = operands.count(); + + for(int i = 0; i < len; ++i) + { + if(operands.at(i)->is(IDNamespaceConstructor)) + { + const QXmlName &nb = operands.at(i)->as<NamespaceConstructor>()->namespaceBinding(); + overrides.insert(nb.prefix(), nb.namespaceURI()); + } + } + } + + const NamespaceResolver::Ptr newResolver(new DelegatingNamespaceResolver(context->namespaceBindings(), overrides)); + const StaticContext::Ptr augmented(new StaticNamespaceContext(newResolver, context)); + + return PairContainer::typeCheck(augmented, reqType); +} + +SequenceType::Ptr ElementConstructor::staticType() const +{ + return CommonSequenceTypes::ExactlyOneElement; +} + +SequenceType::List ElementConstructor::expectedOperandTypes() const +{ + SequenceType::List result; + result.append(CommonSequenceTypes::ExactlyOneQName); + result.append(CommonSequenceTypes::ZeroOrMoreItems); + return result; +} + +Expression::Properties ElementConstructor::properties() const +{ + return DisableElimination | IsNodeConstructor; +} + +ExpressionVisitorResult::Ptr +ElementConstructor::accept(const ExpressionVisitor::Ptr &visitor) const +{ + return visitor->visit(this); +} + +QT_END_NAMESPACE |