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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. |
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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 |
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38 | ****************************************************************************/ |
39 | |
40 | #include "qcommonsequencetypes_p.h" |
41 | #include "qatomicstring_p.h" |
42 | |
43 | #include "qsimplecontentconstructor_p.h" |
44 | |
45 | QT_BEGIN_NAMESPACE |
46 | |
47 | using namespace QPatternist; |
48 | |
49 | SimpleContentConstructor::SimpleContentConstructor(const Expression::Ptr &operand) : SingleContainer(operand) |
50 | { |
51 | } |
52 | |
53 | Item 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 | |
77 | Expression::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 | |
92 | SequenceType::List SimpleContentConstructor::expectedOperandTypes() const |
93 | { |
94 | SequenceType::List result; |
95 | result.append(t: CommonSequenceTypes::ZeroOrMoreAtomicTypes); |
96 | return result; |
97 | } |
98 | |
99 | SequenceType::Ptr SimpleContentConstructor::staticType() const |
100 | { |
101 | if(m_operand->staticType()->cardinality().allowsEmpty()) |
102 | return CommonSequenceTypes::ZeroOrOneString; |
103 | else |
104 | return CommonSequenceTypes::ExactlyOneString; |
105 | } |
106 | |
107 | ExpressionVisitorResult::Ptr SimpleContentConstructor::accept(const ExpressionVisitor::Ptr &visitor) const |
108 | { |
109 | return visitor->visit(this); |
110 | } |
111 | |
112 | QT_END_NAMESPACE |
113 |