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39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49
50#ifndef Patternist_DelegatingDynamicContext_H
51#define Patternist_DelegatingDynamicContext_H
52
53#include <private/qdynamiccontext_p.h>
54#include <private/qexpression_p.h>
55
56QT_BEGIN_NAMESPACE
57
58namespace QPatternist
59{
60 /**
61 * @short Base class for dynamic contexts that are
62 * created from an existing one.
63 *
64 * In some cases multiple DynamicContext instances must be used in
65 * order to maintain somekind of scope. This class delegates
66 * the DynamicContext interface onto another DynamicContext instance,
67 * allowing the sub-class to only implement what it needs to.
68 *
69 * @author Frans Englich <frans.englich@nokia.com>
70 */
71 class DelegatingDynamicContext : public DynamicContext
72 {
73 public:
74 virtual xsInteger contextPosition() const;
75 virtual Item contextItem() const;
76 virtual xsInteger contextSize();
77
78 virtual ItemCacheCell &itemCacheCell(const VariableSlotID slot);
79 virtual ItemSequenceCacheCell::Vector &itemSequenceCacheCells(const VariableSlotID slot);
80
81 virtual void setRangeVariable(const VariableSlotID slotNumber,
82 const Item &newValue);
83 virtual Item rangeVariable(const VariableSlotID slotNumber) const;
84
85 virtual void setExpressionVariable(const VariableSlotID slotNumber,
86 const Expression::Ptr &newValue);
87 virtual Expression::Ptr expressionVariable(const VariableSlotID slotNumber) const;
88
89 virtual void setFocusIterator(const Item::Iterator::Ptr &it);
90 virtual Item::Iterator::Ptr focusIterator() const;
91
92 virtual Item::Iterator::Ptr positionIterator(const VariableSlotID slot) const;
93 virtual void setPositionIterator(const VariableSlotID slot,
94 const Item::Iterator::Ptr &newValue);
95
96 virtual QAbstractMessageHandler * messageHandler() const;
97 virtual QExplicitlySharedDataPointer<DayTimeDuration> implicitTimezone() const;
98 virtual QDateTime currentDateTime() const;
99 virtual QAbstractXmlReceiver *outputReceiver() const;
100 virtual NodeBuilder::Ptr nodeBuilder(const QUrl &baseURI) const;
101 virtual ResourceLoader::Ptr resourceLoader() const;
102 virtual ExternalVariableLoader::Ptr externalVariableLoader() const;
103 virtual NamePool::Ptr namePool() const;
104 virtual QSourceLocation locationFor(const SourceLocationReflection *const reflection) const;
105 virtual void addNodeModel(const QAbstractXmlNodeModel::Ptr &nm);
106 virtual const QAbstractUriResolver *uriResolver() const;
107 virtual ItemCacheCell &globalItemCacheCell(const VariableSlotID slot);
108 virtual ItemSequenceCacheCell::Vector &globalItemSequenceCacheCells(const VariableSlotID slot);
109 virtual Item currentItem() const;
110 virtual TemplateParameterHash &templateParameterStore();
111
112 virtual DynamicContext::Ptr previousContext() const;
113 virtual QExplicitlySharedDataPointer<TemplateMode> currentTemplateMode() const;
114
115 protected:
116 DelegatingDynamicContext(const DynamicContext::Ptr &prevContext);
117
118 const DynamicContext::Ptr m_prevContext;
119 };
120}
121
122QT_END_NAMESPACE
123
124#endif
125

source code of qtxmlpatterns/src/xmlpatterns/environment/qdelegatingdynamiccontext_p.h