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#ifndef _SFX_XMLIDREGISTRY_HXX_
#define _SFX_XMLIDREGISTRY_HXX_

#include <sal/config.h>

#include <sfx2/dllapi.h>

#include <com/sun/star/beans/StringPair.hpp>


namespace com { namespace sun { namespace star { namespace rdf {
    class XMetadatable;
} } } }

namespace sfx2 {

// XML ID utilities --------------------------------------------------

/** is i_rIdref a valid NCName ? */
bool SFX2_DLLPUBLIC isValidNCName(::rtl::OUString const & i_rIdref);

extern inline bool
isValidXmlId(::rtl::OUString const & i_rStreamName,
    ::rtl::OUString const & i_rIdref)
{
    return isValidNCName(i_rIdref) &&
        (i_rStreamName.equalsAscii("content.xml") ||
         i_rStreamName.equalsAscii("styles.xml"));
}


// XML ID handling ---------------------------------------------------

/** interface for getElementByMetadataReference;
    for use by sfx2::DocumentMetadataAccess
 */
class SFX2_DLLPUBLIC IXmlIdRegistry
{

public:
    virtual ~IXmlIdRegistry() { }

    virtual ::com::sun::star::uno::Reference<
            ::com::sun::star::rdf::XMetadatable > SAL_CALL
        GetElementByMetadataReference(
            const ::com::sun::star::beans::StringPair & i_rXmlId) const = 0;

};

/** supplier interface for the registry.

    This indirection is unfortunately necessary, because the SwDocShell
    is not always connected to a SwDoc, so we cannot guarantee that a
    registry given to a SfxBaseModel/DocumentMetadataAccess remains valid;
    it has to be retrieved from this supplier interface on access.
 */
class SFX2_DLLPUBLIC IXmlIdRegistrySupplier
{

public:
    virtual ~IXmlIdRegistrySupplier() { }

    /** override this if you have a XmlIdRegistry. */
    virtual const IXmlIdRegistry* GetXmlIdRegistry() const { return 0; }

};

} // namespace sfx2

#endif // _SFX_XMLIDREGISTRY_HXX_