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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 : #ifndef INCLUDED_CHART2_SOURCE_INC_COMMONFUNCTORS_HXX
20 : #define INCLUDED_CHART2_SOURCE_INC_COMMONFUNCTORS_HXX
21 :
22 : #include <algorithm>
23 : #include <functional>
24 : #include <o3tl/compat_functional.hxx>
25 : #include <rtl/math.hxx>
26 : #include <com/sun/star/uno/Any.hxx>
27 : #include <rtl/ustring.hxx>
28 : #include <com/sun/star/uno/Sequence.hxx>
29 : #include "charttoolsdllapi.hxx"
30 :
31 : namespace chart
32 : {
33 : namespace CommonFunctors
34 : {
35 :
36 : /** unary function to convert any type T into a ::com::sun::star::uno::Any.
37 :
38 : <p>uno::makeAny is an inline function. Thus is cannot be taken directly
39 : (via mem_fun_ptr)</p>
40 : */
41 : template< typename T >
42 : struct makeAny : public ::std::unary_function< T, ::com::sun::star::uno::Any >
43 : {
44 0 : ::com::sun::star::uno::Any operator() ( const T & aVal )
45 : {
46 0 : return ::com::sun::star::uno::makeAny( aVal );
47 : }
48 : };
49 :
50 : /** unary function to convert ::com::sun::star::uno::Any into a double number.
51 :
52 : <p>In case no number can be generated from the Any, NaN (see
53 : rtl::math::SetNAN()) is returned.</p>
54 : */
55 : struct OOO_DLLPUBLIC_CHARTTOOLS AnyToDouble : public ::std::unary_function< ::com::sun::star::uno::Any, double >
56 : {
57 0 : double operator() ( const ::com::sun::star::uno::Any & rAny )
58 : {
59 : double fResult;
60 0 : ::rtl::math::setNan( & fResult );
61 :
62 0 : ::com::sun::star::uno::TypeClass eClass( rAny.getValueType().getTypeClass() );
63 0 : if( eClass == ::com::sun::star::uno::TypeClass_DOUBLE )
64 : {
65 0 : fResult = * reinterpret_cast< const double * >( rAny.getValue() );
66 : }
67 :
68 0 : return fResult;
69 : }
70 : };
71 :
72 : /** unary function to convert ::com::sun::star::uno::Any into an
73 : OUString.
74 : */
75 : struct OOO_DLLPUBLIC_CHARTTOOLS AnyToString : public ::std::unary_function< ::com::sun::star::uno::Any, OUString >
76 : {
77 0 : OUString operator() ( const ::com::sun::star::uno::Any & rAny )
78 : {
79 0 : ::com::sun::star::uno::TypeClass eClass( rAny.getValueType().getTypeClass() );
80 0 : if( eClass == ::com::sun::star::uno::TypeClass_DOUBLE )
81 : {
82 0 : const double* pDouble = reinterpret_cast< const double * >( rAny.getValue() );
83 0 : if( ::rtl::math::isNan(*pDouble) )
84 0 : return OUString();
85 : return ::rtl::math::doubleToUString(
86 : * pDouble,
87 : rtl_math_StringFormat_Automatic,
88 : -1, // use maximum decimal places available
89 : sal_Char( '.' ), // decimal separator
90 : false // do not erase trailing zeros
91 0 : );
92 : }
93 0 : else if( eClass == ::com::sun::star::uno::TypeClass_STRING )
94 : {
95 0 : return * reinterpret_cast< const OUString * >( rAny.getValue() );
96 : }
97 :
98 0 : return OUString();
99 : }
100 : };
101 :
102 : /** unary function to convert an OUString into a double number.
103 :
104 : <p>For conversion rtl::math::StringToDouble is used.</p>
105 : */
106 : struct OOO_DLLPUBLIC_CHARTTOOLS OUStringToDouble : public ::std::unary_function< OUString, double >
107 : {
108 0 : double operator() ( const OUString & rStr )
109 : {
110 : rtl_math_ConversionStatus eConversionStatus;
111 0 : double fResult = ::rtl::math::stringToDouble( rStr, '.', ',', & eConversionStatus, NULL );
112 :
113 0 : if( eConversionStatus != rtl_math_ConversionStatus_Ok )
114 0 : ::rtl::math::setNan( & fResult );
115 :
116 0 : return fResult;
117 : }
118 : };
119 :
120 : /** unary function to convert a double number into an OUString.
121 :
122 : <p>For conversion rtl::math::DoubleToOUString is used.</p>
123 : */
124 : struct OOO_DLLPUBLIC_CHARTTOOLS DoubleToOUString : public ::std::unary_function< double, OUString >
125 : {
126 0 : OUString operator() ( double fNumber )
127 : {
128 : return ::rtl::math::doubleToUString(
129 : fNumber,
130 : rtl_math_StringFormat_Automatic,
131 : -1, // use maximum number of decimal places
132 : static_cast< sal_Char >( '.' ),
133 : false // do not erase trailing zeros
134 0 : );
135 : }
136 : };
137 :
138 : /** can be used to find an element with a specific first element in e.g. a
139 : vector of pairs (for searching keys in maps you will of course use map::find)
140 : */
141 : template< typename First, typename Second >
142 : class FirstOfPairEquals : public ::std::unary_function< ::std::pair< First, Second >, bool >
143 : {
144 : public:
145 : FirstOfPairEquals( const First & aVal )
146 : : m_aValueToCompareWith( aVal )
147 : {}
148 : bool operator() ( const ::std::pair< First, Second > & rElem )
149 : {
150 : return rElem.first == m_aValueToCompareWith;
151 : }
152 :
153 : private:
154 : First m_aValueToCompareWith;
155 : };
156 :
157 : /** can be used to find a certain value in a map
158 :
159 : ::std::find_if( aMap.begin(), aMap.end(),
160 : SecondOfPairEquals< string, int >( 42 ));
161 : */
162 : template< typename Key, typename Value >
163 : class SecondOfPairEquals : public ::std::unary_function< ::std::pair< Key, Value >, bool >
164 : {
165 : public:
166 : SecondOfPairEquals( const Value & aVal )
167 : : m_aValueToCompareWith( aVal )
168 : {}
169 : bool operator() ( const ::std::pair< Key, Value > & rMapElem )
170 : {
171 : return rMapElem.second == m_aValueToCompareWith;
172 : }
173 :
174 : private:
175 : Value m_aValueToCompareWith;
176 : };
177 :
178 : /** Searches for data in a given map, i.e. not for the key but for the data
179 : pointed to by the keys.
180 :
181 : To find a key (value) you can use rMap.find( rValue )
182 : */
183 : template< class MapType >
184 : inline typename MapType::const_iterator
185 : findValueInMap( const MapType & rMap, const typename MapType::mapped_type & rData )
186 : {
187 : return ::std::find_if( rMap.begin(), rMap.end(),
188 : ::o3tl::compose1( ::std::bind2nd(
189 : ::std::equal_to< typename MapType::mapped_type >(),
190 : rData ),
191 : ::o3tl::select2nd< typename MapType::value_type >()));
192 : }
193 :
194 : /** Functor that deletes the object behind the given pointer by calling the
195 : delete operator
196 : */
197 : template< typename T >
198 : struct DeletePtr : public ::std::unary_function< T *, void >
199 : {
200 : void operator() ( T * pObj )
201 : { delete pObj; }
202 : };
203 :
204 : } // namespace CommonFunctors
205 : } // namespace chart
206 :
207 : // INCLUDED_CHART2_SOURCE_INC_COMMONFUNCTORS_HXX
208 : #endif
209 :
210 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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