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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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| |
| #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 |