1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/****************************************************************************
**
** 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
|
