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+/****************************************************************************
+**
+** 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 "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