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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 "qbuiltintypes_p.h" |
| #include "qcommonsequencetypes_p.h" |
| #include "qitemmappingiterator_p.h" |
| |
| #include "qcopyof_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace QPatternist; |
| |
| CopyOf::CopyOf(const Expression::Ptr &operand, |
| const bool inheritNSS, |
| const bool preserveNSS) : SingleContainer(operand) |
| , m_inheritNamespaces(inheritNSS) |
| , m_preserveNamespaces(preserveNSS) |
| , m_settings((m_inheritNamespaces ? QAbstractXmlNodeModel::InheritNamespaces : QAbstractXmlNodeModel::NodeCopySettings()) | |
| (m_preserveNamespaces ? QAbstractXmlNodeModel::PreserveNamespaces : QAbstractXmlNodeModel::NodeCopySettings())) |
| { |
| } |
| |
| Expression::Ptr CopyOf::compress(const StaticContext::Ptr &context) |
| { |
| /* We have zero effect if we have these settings. */ |
| if(m_inheritNamespaces && m_preserveNamespaces) |
| return m_operand->compress(context); |
| else |
| { |
| const ItemType::Ptr t(m_operand->staticType()->itemType()); |
| /* We have no effect on the empty sequence or atomic values. */ |
| if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t) |
| || *t == *CommonSequenceTypes::Empty) |
| return m_operand->compress(context); |
| else |
| return SingleContainer::compress(context); |
| } |
| } |
| |
| void CopyOf::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const |
| { |
| /* Optimization: this completely breaks streaming. We get a call to |
| * evaluateToSequenceReceiver() but we require heap allocations by calling |
| * evaluateSequence(). */ |
| |
| const Item::Iterator::Ptr it(m_operand->evaluateSequence(context)); |
| QAbstractXmlReceiver *const receiver = context->outputReceiver(); |
| Item next(it->next()); |
| |
| while(next) |
| { |
| if(next.isNode()) |
| { |
| const QXmlNodeModelIndex &asNode = next.asNode(); |
| asNode.model()->copyNodeTo(asNode, receiver, m_settings); |
| } |
| else |
| receiver->item(next); |
| |
| next = it->next(); |
| } |
| } |
| |
| ExpressionVisitorResult::Ptr CopyOf::accept(const ExpressionVisitor::Ptr &visitor) const |
| { |
| return visitor->visit(this); |
| } |
| |
| SequenceType::Ptr CopyOf::staticType() const |
| { |
| return m_operand->staticType(); |
| } |
| |
| SequenceType::List CopyOf::expectedOperandTypes() const |
| { |
| SequenceType::List result; |
| result.append(CommonSequenceTypes::ZeroOrMoreItems); |
| return result; |
| } |
| |
| Expression::Properties CopyOf::properties() const |
| { |
| /* We have the content of node constructors as children, but even though |
| * createCopyOf() typically avoids creating us, we can still end up with an operand |
| * that allows compression. We must always avoid that, because we don't have |
| * implementation of evaluateSequence(), and so on. */ |
| return (m_operand->properties() & ~CreatesFocusForLast) | DisableElimination; |
| } |
| |
| ItemType::Ptr CopyOf::expectedContextItemType() const |
| { |
| return m_operand->expectedContextItemType(); |
| } |
| |
| QT_END_NAMESPACE |