src/xmlpatterns/schema/qnamespacesupport_p.h

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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_NamespaceSupport_H
  53 #define Patternist_NamespaceSupport_H
  54
  55 #include "qnamepool_p.h"
  56
  57 #include <QtCore/QExplicitlySharedDataPointer>
  58 #include <QtCore/QHash>
  59 #include <QtCore/QSet>
  60 #include <QtCore/QStack>
  61 #include <QtCore/QXmlStreamNamespaceDeclarations>
  62
  63 QT_BEGIN_HEADER
  64
  65 QT_BEGIN_NAMESPACE
  66
  67 namespace QPatternist
  68 {
  69     /**
  70      * @short A helper class for handling nested namespace declarations.
  71      *
  72      * This class is mostly an adaption of QXmlNamespaceSupport to the NamePool
  73      * mechanism used in XmlPatterns.
  74      *
  75      * @ingroup Patternist_schema
  76      * @author Tobias Koenig <tobias.koenig@nokia.com>
  77      */
  78     class NamespaceSupport
  79     {
  80         public:
  81             /**
  82              * Describes whether the name to process is an attribute or element.
  83              */
  84             enum NameType
  85             {
  86                 AttributeName,  ///< An attribute name to process.
  87                 ElementName     ///< An element name to process.
  88             };
  89
  90             /**
  91              * Creates an empty namespace support object.
  92              */
  93             NamespaceSupport();
  94
  95             /**
  96              * Creates a new namespace support object.
  97              *
  98              * @param namePool The name pool where all processed names are stored in.
  99              */
 100             NamespaceSupport(const NamePool::Ptr &namePool);
 101
 102             /**
 103              * Adds a new prefix-to-namespace binding.
 104              *
 105              * @param prefixCode The name pool code for the prefix.
 106              * @param namespaceCode The name pool code for the namespace.
 107              */
 108             void setPrefix(const QXmlName::PrefixCode prefixCode, const QXmlName::NamespaceCode namespaceCode);
 109
 110             /**
 111              * Adds the prefix-to-namespace bindings from @p declarations to
 112              * the namespace support.
 113              */
 114             void setPrefixes(const QXmlStreamNamespaceDeclarations &declarations);
 115
 116             /**
 117              * Sets the name pool code of the target namespace of the schema the
 118              * namespace support works on.
 119              */
 120             void setTargetNamespace(const QXmlName::NamespaceCode code);
 121
 122             /**
 123              * Returns the prefix code for the given namespace @p code.
 124              */
 125             QXmlName::PrefixCode prefix(const QXmlName::NamespaceCode code) const;
 126
 127             /**
 128              * Returns the namespace code for the given prefix @p code.
 129              */
 130             QXmlName::NamespaceCode uri(const QXmlName::PrefixCode code) const;
 131
 132             /**
 133              * Converts the given @p qualifiedName to a resolved QXmlName @p name according
 134              * to the current namespace mapping.
 135              *
 136              * @param qualifiedName The full qualified name.
 137              * @param type The type of name processing.
 138              * @param name The resolved QXmlName.
 139              *
 140              * @returns @c true if the name could be processed correctly or @c false if the
 141              *          namespace prefix is unknown.
 142              */
 143             bool processName(const QString &qualifiedName, NameType type, QXmlName &name) const;
 144
 145             /**
 146              * Pushes the current namespace mapping onto the stack.
 147              */
 148             void pushContext();
 149
 150             /**
 151              * Pops the current namespace mapping from the stack.
 152              */
 153             void popContext();
 154
 155             /**
 156              * Returns the list of namespace bindings.
 157              */
 158             QList<QXmlName> namespaceBindings() const;
 159
 160         private:
 161             typedef QHash<QXmlName::PrefixCode, QXmlName::NamespaceCode> NamespaceHash;
 162
 163             NamePool::Ptr         m_namePool;
 164             QStack<NamespaceHash> m_nsStack;
 165             NamespaceHash         m_ns;
 166     };
 167 }
 168
 169 QT_END_NAMESPACE
 170
 171 QT_END_HEADER
 172
 173 #endif