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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.

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    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists purely as an

    47 // implementation detail.  This header file may change from version to

    48 // version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 

    52 #ifndef Patternist_DelegatingDynamicContext_H

    53 #define Patternist_DelegatingDynamicContext_H

    54 

    55 #include "qdynamiccontext_p.h"

    56 #include "qexpression_p.h"

    57 

    58 QT_BEGIN_HEADER

    59 

    60 QT_BEGIN_NAMESPACE

    61 

    62 namespace QPatternist

    63 {

    64     /**

    65      * @short Base class for dynamic contexts that are

    66      * created from an existing one.

    67      *

    68      * In some cases multiple DynamicContext instances must be used in

    69      * order to maintain somekind of scope. This class delegates

    70      * the DynamicContext interface onto another DynamicContext instance,

    71      * allowing the sub-class to only implement what it needs to.

    72      *

    73      * @author Frans Englich <frans.englich@nokia.com>

    74      */

    75     class DelegatingDynamicContext : public DynamicContext

    76     {

    77     public:

    78         virtual xsInteger contextPosition() const;

    79         virtual Item contextItem() const;

    80         virtual xsInteger contextSize();

    81 

    82         virtual ItemCacheCell &itemCacheCell(const VariableSlotID slot);

    83         virtual ItemSequenceCacheCell::Vector &itemSequenceCacheCells(const VariableSlotID slot);

    84 

    85         virtual void setRangeVariable(const VariableSlotID slotNumber,

    86                                       const Item &newValue);

    87         virtual Item rangeVariable(const VariableSlotID slotNumber) const;

    88 

    89         virtual void setExpressionVariable(const VariableSlotID slotNumber,

    90                                            const Expression::Ptr &newValue);

    91         virtual Expression::Ptr expressionVariable(const VariableSlotID slotNumber) const;

    92 

    93         virtual void setFocusIterator(const Item::Iterator::Ptr &it);

    94         virtual Item::Iterator::Ptr focusIterator() const;

    95 

    96         virtual Item::Iterator::Ptr positionIterator(const VariableSlotID slot) const;

    97         virtual void setPositionIterator(const VariableSlotID slot,

    98                                          const Item::Iterator::Ptr &newValue);

    99 

   100         virtual QAbstractMessageHandler * messageHandler() const;

   101         virtual QExplicitlySharedDataPointer<DayTimeDuration> implicitTimezone() const;

   102         virtual QDateTime currentDateTime() const;

   103         virtual QAbstractXmlReceiver *outputReceiver() const;

   104         virtual NodeBuilder::Ptr nodeBuilder(const QUrl &baseURI) const;

   105         virtual ResourceLoader::Ptr resourceLoader() const;

   106         virtual ExternalVariableLoader::Ptr externalVariableLoader() const;

   107         virtual NamePool::Ptr namePool() const;

   108         virtual QSourceLocation locationFor(const SourceLocationReflection *const reflection) const;

   109         virtual void addNodeModel(const QAbstractXmlNodeModel::Ptr &nm);

   110         virtual const QAbstractUriResolver *uriResolver() const;

   111         virtual ItemCacheCell &globalItemCacheCell(const VariableSlotID slot);

   112         virtual ItemSequenceCacheCell::Vector &globalItemSequenceCacheCells(const VariableSlotID slot);

   113         virtual Item currentItem() const;

   114         virtual TemplateParameterHash &templateParameterStore();

   115 

   116         virtual DynamicContext::Ptr previousContext() const;

   117         virtual QExplicitlySharedDataPointer<TemplateMode> currentTemplateMode() const;

   118 

   119     protected:

   120         DelegatingDynamicContext(const DynamicContext::Ptr &prevContext);

   121 

   122         const DynamicContext::Ptr m_prevContext;

   123     };

   124 }

   125 

   126 QT_END_NAMESPACE

   127 

   128 QT_END_HEADER

   129 

   130 #endif