xref: /aoo41x/main/xmloff/source/forms/ifacecompare.hxx (revision ecfe53c5)

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#ifndef _XMLOFF_FORMS_IFACECOMPARE_HXX_
#define _XMLOFF_FORMS_IFACECOMPARE_HXX_

#include <comphelper/stl_types.hxx>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/drawing/XDrawPage.hpp>

//.........................................................................
namespace xmloff
{
//.........................................................................

	//=====================================================================
	//= OInterfaceCompare
	//=====================================================================
	/** is stl-compliant structure for comparing Reference&lt; &lt;iface&gt; &gt; instances
	*/
	template < class IAFCE >
	struct OInterfaceCompare
		:public ::std::binary_function	<	::com::sun::star::uno::Reference< IAFCE >
										,	::com::sun::star::uno::Reference< IAFCE >
										,	bool
										>
	{
		bool operator() (const ::com::sun::star::uno::Reference< IAFCE >& lhs, const ::com::sun::star::uno::Reference< IAFCE >& rhs) const
		{
			return lhs.get() < rhs.get();
				// this does not make any sense if you see the semantics of the pointer returned by get:
				// It's a pointer to a point in memory where an interface implementation lies.
				// But for our purpose (provide a reliable less-operator which can be used with the STL), this is
				// sufficient ....
		}
	};

	typedef OInterfaceCompare< ::com::sun::star::beans::XPropertySet >	OPropertySetCompare;
	typedef OInterfaceCompare< ::com::sun::star::drawing::XDrawPage >	ODrawPageCompare;

//.........................................................................
}	// namespace xmloff
//.........................................................................

#endif // _XMLOFF_FORMS_IFACECOMPARE_HXX_