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#ifndef _XMLOFF_EVENTIMPORTHELPER_HXX
#define _XMLOFF_EVENTIMPORTHELPER_HXX

#include <com/sun/star/uno/Reference.hxx>
#include <xmloff/xmlevent.hxx>

#include <map>
#include <list>


namespace com { namespace sun { namespace star {
    namespace xml { namespace sax {	class XAttributeList; } }
} } }
namespace rtl {	class OUString; }
class XMLEventContextFactory;
class XMLEventsImportContext;
struct XMLEventNameTranslation;

typedef ::std::map< ::rtl::OUString, XMLEventContextFactory* > FactoryMap;
typedef ::std::map< XMLEventName, ::rtl::OUString > NameMap;
typedef ::std::list< NameMap* > NameMapList;


/**
 * Helps the XMLEventsImportContext.
 * 
 * This class stores
 * a) the translation from XML event names to API event names, and
 * b) a mapping from script language names to XMLEventContextFactory objects
 *    (that handle particular languages).
 *
 * Event name translation tables may be added, i.e. they will be joined 
 * together. If different translations are needed (i.e., if the same XML name
 * needs to be translated to different API names in different contexts), then
 * translation tables may be saved on a translation table stack.
 */
class XMLEventImportHelper
{
    /// map of XMLEventContextFactory objects
    FactoryMap aFactoryMap;

    /// map from XML to API names
    NameMap* pEventNameMap;

    /// stack of previous aEventNameMap
    NameMapList aEventNameMapList;

public:
    XMLEventImportHelper();

    ~XMLEventImportHelper();

    /// register a handler for a particular language type
    void RegisterFactory( const ::rtl::OUString& rLanguage,
                          XMLEventContextFactory* aFactory );

    /// add event name translation to the internal table
    void AddTranslationTable( const XMLEventNameTranslation* pTransTable );

    /// save the old translation table on a stack and install an empty table
    void PushTranslationTable();

    /// recover the top-most previously saved translation table
    void PopTranslationTable();

    /// create an appropriate import context for a particular event
    SvXMLImportContext* CreateContext(
        SvXMLImport& rImport,
        sal_uInt16 nPrefix,
        const ::rtl::OUString& rLocalName,
        const ::com::sun::star::uno::Reference< 
            ::com::sun::star::xml::sax::XAttributeList> & xAttrList,
        XMLEventsImportContext* rEvents,
        const ::rtl::OUString& rXmlEventName,
        const ::rtl::OUString& rLanguage);

};

#endif