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libreoffice/xmloff/source/forms/ifacecompare.hxx
2011-03-29 21:40:28 +01:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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_
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