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6** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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39
40#include "qcommonsequencetypes_p.h"
41#include "qpatternistlocale_p.h"
42#include "qnodebuilder_p.h"
43#include "qqnamevalue_p.h"
44
45#include "qprocessinginstructionconstructor_p.h"
46
47QT_BEGIN_NAMESPACE
48
49using namespace QPatternist;
50
51ProcessingInstructionConstructor::
52ProcessingInstructionConstructor(const Expression::Ptr &op1,
53 const Expression::Ptr &op2) : PairContainer(op1, op2)
54{
55}
56
57QString ProcessingInstructionConstructor::leftTrimmed(const QString &input)
58{
59 const int len = input.length();
60
61 for(int i = 0; i < len; ++i)
62 {
63 if(!input.at(i).isSpace())
64 return input.mid(position: i);
65 }
66
67 return QString(); /* input consists only of whitespace. All was trimmed. */
68}
69
70QString ProcessingInstructionConstructor::data(const DynamicContext::Ptr &context) const
71{
72 const Item name(m_operand1->evaluateSingleton(context));
73 const Item dataArg(m_operand2->evaluateSingleton(context));
74
75 if(dataArg)
76 {
77 /* Perform trimming before validation, to increase speed. */
78 const QString value(leftTrimmed(input: dataArg.stringValue()));
79
80 if(value.contains(s: QLatin1String("?>")))
81 {
82 context->error(message: QtXmlPatterns::tr(sourceText: "The data of a processing instruction cannot contain the string %1").arg(a: formatData(data: "?>")),
83 errorCode: ReportContext::XQDY0026, reflection: this);
84 return QString();
85 }
86 else
87 return value;
88 }
89 else
90 return QString();
91}
92
93QXmlName ProcessingInstructionConstructor::evaluateTardata(const DynamicContext::Ptr &context) const
94{
95 const Item name(m_operand1->evaluateSingleton(context));
96 return context->namePool()->allocateQName(uri: QString(), localName: name.stringValue());
97}
98
99Item ProcessingInstructionConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const
100{
101 const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(baseURI: QUrl()));
102
103 nodeBuilder->processingInstruction(target: evaluateTardata(context), value: data(context));
104
105 const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument());
106 context->addNodeModel(nm);
107
108 return nm->root(n: QXmlNodeModelIndex());
109}
110
111void ProcessingInstructionConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
112{
113 QAbstractXmlReceiver *const receiver = context->outputReceiver();
114
115 receiver->processingInstruction(target: evaluateTardata(context), value: data(context));
116}
117
118SequenceType::Ptr ProcessingInstructionConstructor::staticType() const
119{
120 return CommonSequenceTypes::ExactlyOneProcessingInstruction;
121}
122
123SequenceType::List ProcessingInstructionConstructor::expectedOperandTypes() const
124{
125 SequenceType::List result;
126 result.append(t: CommonSequenceTypes::ExactlyOneString);
127 result.append(t: CommonSequenceTypes::ZeroOrOneString);
128 return result;
129}
130
131Expression::Properties ProcessingInstructionConstructor::properties() const
132{
133 return DisableElimination | IsNodeConstructor;
134}
135
136ExpressionVisitorResult::Ptr
137ProcessingInstructionConstructor::accept(const ExpressionVisitor::Ptr &visitor) const
138{
139 return visitor->visit(this);
140}
141
142QT_END_NAMESPACE
143

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