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 "qatomicstring_p.h"
41#include "qcommonsequencetypes_p.h"
42
43#include "qxsltsimplecontentconstructor_p.h"
44
45QT_BEGIN_NAMESPACE
46
47using namespace QPatternist;
48
49XSLTSimpleContentConstructor::XSLTSimpleContentConstructor(const Expression::Ptr &source) : SimpleContentConstructor(source)
50{
51}
52
53QString XSLTSimpleContentConstructor::processItem(const Item &item,
54 bool &discard,
55 bool &isText)
56{
57 if(item.isNode())
58 {
59 isText = (item.asNode().kind() == QXmlNodeModelIndex::Text);
60
61 if(isText)
62 {
63 const QString value(item.stringValue());
64
65 /* "1. Zero-length text nodes in the sequence are discarded." */
66 discard = value.isEmpty();
67 return value;
68 }
69 else
70 {
71 Item::Iterator::Ptr it(item.sequencedTypedValue()); /* Atomic values. */
72 Item next(it->next());
73 QString result;
74
75 if(next)
76 result = next.stringValue();
77
78 next = it->next();
79
80 while(next)
81 {
82 result += next.stringValue();
83 result += QLatin1Char(' ');
84 next = it->next();
85 }
86
87 return result;
88 }
89 }
90 else
91 {
92 discard = false;
93 isText = false;
94 return item.stringValue();
95 }
96}
97
98Item XSLTSimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const
99{
100 const Item::Iterator::Ptr it(m_operand->evaluateSequence(context));
101
102 Item next(it->next());
103 QString result;
104
105 bool previousIsText = false;
106 bool discard = false;
107
108 if(next)
109 {
110 const QString unit(processItem(item: next, discard, isText&: previousIsText));
111
112 if(!discard)
113 result = unit;
114
115 next = it->next();
116 }
117 else
118 return Item();
119
120 while(next)
121 {
122 bool currentIsText = false;
123 const QString unit(processItem(item: next, discard, isText&: currentIsText));
124
125 if(!discard)
126 {
127 /* "Adjacent text nodes in the sequence are merged into a single text
128 * node." */
129 if(previousIsText && currentIsText)
130 ;
131 else
132 result += QLatin1Char(' ');
133
134 result += unit;
135 }
136
137 next = it->next();
138 previousIsText = currentIsText;
139 }
140
141 return AtomicString::fromValue(value: result);
142}
143
144SequenceType::List XSLTSimpleContentConstructor::expectedOperandTypes() const
145{
146 SequenceType::List result;
147 result.append(t: CommonSequenceTypes::ZeroOrMoreItems);
148 return result;
149}
150
151SequenceType::Ptr XSLTSimpleContentConstructor::staticType() const
152{
153 return CommonSequenceTypes::ZeroOrOneString;
154}
155
156QT_END_NAMESPACE
157

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