1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtXmlPatterns module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "qcommonsequencetypes_p.h"
41#include "qatomicstring_p.h"
42
43#include "qsimplecontentconstructor_p.h"
44
45QT_BEGIN_NAMESPACE
46
47using namespace QPatternist;
48
49SimpleContentConstructor::SimpleContentConstructor(const Expression::Ptr &operand) : SingleContainer(operand)
50{
51}
52
53Item SimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const
54{
55 const Item::Iterator::Ptr it(m_operand->evaluateSequence(context));
56 Item next(it->next());
57 QString result;
58
59 if(next)
60 {
61 result = next.stringValue();
62 next = it->next();
63 }
64 else
65 return Item();
66
67 while(next)
68 {
69 result += QLatin1Char(' ');
70 result += next.stringValue();
71 next = it->next();
72 }
73
74 return AtomicString::fromValue(value: result);
75}
76
77Expression::Ptr SimpleContentConstructor::compress(const StaticContext::Ptr &context)
78{
79 const Expression::Ptr me(SingleContainer::compress(context));
80
81 if(me.data() == this)
82 {
83 /* Optimization: if we will evaluate to a single string, we're not
84 * necessary. */
85 if(CommonSequenceTypes::ExactlyOneString->matches(other: m_operand->staticType()))
86 return m_operand;
87 }
88
89 return me;
90}
91
92SequenceType::List SimpleContentConstructor::expectedOperandTypes() const
93{
94 SequenceType::List result;
95 result.append(t: CommonSequenceTypes::ZeroOrMoreAtomicTypes);
96 return result;
97}
98
99SequenceType::Ptr SimpleContentConstructor::staticType() const
100{
101 if(m_operand->staticType()->cardinality().allowsEmpty())
102 return CommonSequenceTypes::ZeroOrOneString;
103 else
104 return CommonSequenceTypes::ExactlyOneString;
105}
106
107ExpressionVisitorResult::Ptr SimpleContentConstructor::accept(const ExpressionVisitor::Ptr &visitor) const
108{
109 return visitor->visit(this);
110}
111
112QT_END_NAMESPACE
113

source code of qtxmlpatterns/src/xmlpatterns/expr/qsimplecontentconstructor.cpp