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27 #ifndef CHART2_COMMONFUNCTORS_HXX
28 #define CHART2_COMMONFUNCTORS_HXX
29 
30 #include <algorithm>
31 #include <functional>
32 #include <rtl/math.hxx>
33 #include <com/sun/star/uno/Any.hxx>
34 #include <rtl/ustring.hxx>
35 #include <com/sun/star/uno/Sequence.hxx>
36 #include "charttoolsdllapi.hxx"
37 
38 namespace chart
39 {
40 namespace CommonFunctors
41 {
42 
43 /** unary function to convert any type T into a ::com::sun::star::uno::Any.
44 
45     <p>uno::makeAny is an inline function.  Thus is cannot be taken directly
46     (via mem_fun_ptr)</p>
47 */
48 template< typename T >
49     struct makeAny : public ::std::unary_function< T, ::com::sun::star::uno::Any >
50 {
51     ::com::sun::star::uno::Any operator() ( const T & aVal )
52     {
53         return ::com::sun::star::uno::makeAny( aVal );
54     }
55 };
56 
57 /** unary function to convert ::com::sun::star::uno::Any into a double number.
58 
59     <p>In case no number can be generated from the Any, NaN (see
60     rtl::math::SetNAN()) is returned.</p>
61 */
62 struct OOO_DLLPUBLIC_CHARTTOOLS AnyToDouble : public ::std::unary_function< ::com::sun::star::uno::Any, double >
63 {
64     double operator() ( const ::com::sun::star::uno::Any & rAny )
65     {
66         double fResult;
67         ::rtl::math::setNan( & fResult );
68 
69         ::com::sun::star::uno::TypeClass eClass( rAny.getValueType().getTypeClass() );
70         if( eClass == ::com::sun::star::uno::TypeClass_DOUBLE )
71         {
72             fResult = * reinterpret_cast< const double * >( rAny.getValue() );
73         }
74 
75         return fResult;
76     }
77 };
78 
79 /** unary function to convert ::com::sun::star::uno::Any into an
80     ::rtl::OUString.
81 */
82 struct OOO_DLLPUBLIC_CHARTTOOLS AnyToString : public ::std::unary_function< ::com::sun::star::uno::Any,  ::rtl::OUString >
83 {
84     ::rtl::OUString operator() ( const ::com::sun::star::uno::Any & rAny )
85     {
86         ::com::sun::star::uno::TypeClass eClass( rAny.getValueType().getTypeClass() );
87         if( eClass == ::com::sun::star::uno::TypeClass_DOUBLE )
88         {
89             const double* pDouble = reinterpret_cast< const double * >( rAny.getValue() );
90             if( ::rtl::math::isNan(*pDouble) )
91                 return ::rtl::OUString();
92             return ::rtl::math::doubleToUString(
93                 * pDouble,
94                 rtl_math_StringFormat_Automatic,
95                 -1, // use maximum decimal places available
96                 sal_Char( '.' ), // decimal separator
97                 false // do not erase trailing zeros
98                 );
99         }
100         else if( eClass == ::com::sun::star::uno::TypeClass_STRING )
101         {
102             return * reinterpret_cast< const ::rtl::OUString * >( rAny.getValue() );
103         }
104 
105         return ::rtl::OUString();
106     }
107 };
108 
109 /** unary function to convert an ::rtl::OUString into a double number.
110 
111     <p>For conversion rtl::math::StringToDouble is used.</p>
112  */
113 struct OOO_DLLPUBLIC_CHARTTOOLS OUStringToDouble : public ::std::unary_function< ::rtl::OUString, double >
114 {
115     double operator() ( const ::rtl::OUString & rStr )
116     {
117         rtl_math_ConversionStatus eConversionStatus;
118         double fResult = ::rtl::math::stringToDouble( rStr, '.', ',', & eConversionStatus, NULL );
119 
120         if( eConversionStatus != rtl_math_ConversionStatus_Ok )
121             ::rtl::math::setNan( & fResult );
122 
123         return fResult;
124     }
125 };
126 
127 /** unary function to convert a double number into an ::rtl::OUString.
128 
129     <p>For conversion rtl::math::DoubleToOUString is used.</p>
130  */
131 struct OOO_DLLPUBLIC_CHARTTOOLS DoubleToOUString : public ::std::unary_function< double, ::rtl::OUString >
132 {
133     ::rtl::OUString operator() ( double fNumber )
134     {
135         return ::rtl::math::doubleToUString(
136             fNumber,
137             rtl_math_StringFormat_Automatic,
138             -1, // use maximum number of decimal places
139             static_cast< sal_Char >( '.' ),
140             false // do not erase trailing zeros
141             );
142     }
143 };
144 
145 // ================================================================================
146 
147 /** can be used to find an element with a specific first element in e.g. a
148     vector of pairs (for searching keys in maps you will of course use map::find)
149  */
150 template< typename First, typename Second >
151     class FirstOfPairEquals : public ::std::unary_function< ::std::pair< First, Second >, bool >
152 {
153 public:
154     FirstOfPairEquals( const First & aVal )
155             : m_aValueToCompareWith( aVal )
156     {}
157     bool operator() ( const ::std::pair< First, Second > & rElem )
158     {
159         return rElem.first == m_aValueToCompareWith;
160     }
161 
162 private:
163     First m_aValueToCompareWith;
164 };
165 
166 /** can be used to find a certain value in a map
167 
168     ::std::find_if( aMap.begin(), aMap.end(),
169                     SecondOfPairEquals< string, int >( 42 ));
170  */
171 template< typename Key, typename Value >
172     class SecondOfPairEquals : public ::std::unary_function< ::std::pair< Key, Value >, bool >
173 {
174 public:
175     SecondOfPairEquals( const Value & aVal )
176             : m_aValueToCompareWith( aVal )
177     {}
178     bool operator() ( const ::std::pair< Key, Value > & rMapElem )
179     {
180         return rMapElem.second == m_aValueToCompareWith;
181     }
182 
183 private:
184     Value m_aValueToCompareWith;
185 };
186 
187 /** Searches for data in a given map, i.e. not for the key but for the data
188     pointed to by the keys.
189 
190     To find a key (value) you can use rMap.find( rValue )
191  */
192 template< class MapType >
193     inline typename MapType::const_iterator
194     findValueInMap( const MapType & rMap, const typename MapType::mapped_type & rData )
195 {
196     return ::std::find_if( rMap.begin(), rMap.end(),
197                            ::std::compose1( ::std::bind2nd(
198                                                 ::std::equal_to< typename MapType::mapped_type >(),
199                                                 rData ),
200                                             ::std::select2nd< typename MapType::value_type >()));
201 }
202 
203 /** Functor that deletes the object behind the given pointer by calling the
204     delete operator
205  */
206 template< typename T >
207     struct DeletePtr : public ::std::unary_function< T *, void >
208 {
209     void operator() ( T * pObj )
210     { delete pObj; }
211 };
212 
213 } //  namespace CommonFunctors
214 } //  namespace chart
215 
216 // CHART2_COMMONFUNCTORS_HXX
217 #endif
218