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39
40#include "qbuiltintypes_p.h"
41#include "qcommonsequencetypes_p.h"
42#include "qcurrentitemcontext_p.h"
43#include "qstaticcurrentcontext_p.h"
44
45#include "qcurrentitemstore_p.h"
46
47QT_BEGIN_NAMESPACE
48
49using namespace QPatternist;
50
51CurrentItemStore::CurrentItemStore(const Expression::Ptr &operand) : SingleContainer(operand)
52{
53}
54
55DynamicContext::Ptr CurrentItemStore::createContext(const DynamicContext::Ptr &old) const
56{
57 return DynamicContext::Ptr(new CurrentItemContext(old->contextItem(), old));
58}
59
60bool CurrentItemStore::evaluateEBV(const DynamicContext::Ptr &context) const
61{
62 return m_operand->evaluateEBV(context: createContext(old: context));
63}
64
65Item::Iterator::Ptr CurrentItemStore::evaluateSequence(const DynamicContext::Ptr &context) const
66{
67 return m_operand->evaluateSequence(context: createContext(old: context));
68}
69
70Item CurrentItemStore::evaluateSingleton(const DynamicContext::Ptr &context) const
71{
72 return m_operand->evaluateSingleton(context: createContext(old: context));
73}
74
75SequenceType::Ptr CurrentItemStore::staticType() const
76{
77 return m_operand->staticType();
78}
79
80SequenceType::List CurrentItemStore::expectedOperandTypes() const
81{
82 SequenceType::List result;
83 result.append(t: CommonSequenceTypes::ZeroOrMoreItems);
84 return result;
85}
86
87StaticContext::Ptr CurrentItemStore::newStaticContext(const StaticContext::Ptr &context)
88{
89 /* It might be we are generated despite there is no focus. In that case
90 * an error will reported in case current() is used, but in any case we cannot
91 * crash, so use item() in case we have no focus.
92 *
93 * Such a case is when we're inside a named template, and it's invoked
94 * without focus. */
95 const ItemType::Ptr t(context->contextItemType());
96 return StaticContext::Ptr(new StaticCurrentContext(t ? t : BuiltinTypes::item, context));
97}
98
99Expression::Ptr CurrentItemStore::compress(const StaticContext::Ptr &context)
100{
101 const Expression::Ptr me(SingleContainer::compress(context: newStaticContext(context)));
102
103 if(me != this)
104 return me;
105 else
106 {
107 /* If fn:current() isn't called, there's no point in us sticking
108 * around. */
109 if(m_operand->deepProperties().testFlag(flag: RequiresCurrentItem))
110 return me;
111 else
112 return m_operand;
113 }
114}
115
116Expression::Ptr CurrentItemStore::typeCheck(const StaticContext::Ptr &context,
117 const SequenceType::Ptr &reqType)
118{
119 return SingleContainer::typeCheck(context: newStaticContext(context), reqType);
120}
121
122ExpressionVisitorResult::Ptr CurrentItemStore::accept(const ExpressionVisitor::Ptr &visitor) const
123{
124 return visitor->visit(this);
125}
126
127const SourceLocationReflection *CurrentItemStore::actualReflection() const
128{
129 return m_operand->actualReflection();
130}
131
132Expression::Properties CurrentItemStore::properties() const
133{
134 return m_operand->properties() & (RequiresFocus | IsEvaluated | DisableElimination);
135}
136
137QT_END_NAMESPACE
138

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