include/comphelper/property.hxx

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  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
  20 #ifndef INCLUDED_COMPHELPER_PROPERTY_HXX
  21 #define INCLUDED_COMPHELPER_PROPERTY_HXX
  22
  23 #include <cppuhelper/proptypehlp.hxx>
  24 #include <comphelper/extract.hxx>
  25 #include <com/sun/star/beans/Property.hpp>
  26 #include <com/sun/star/beans/XPropertySet.hpp>
  27 #include <functional>
  28 #include <type_traits>
  29 #include <comphelper/comphelperdllapi.h>
  30 #include <cppu/unotype.hxx>
  31
  32 namespace comphelper
  33 {
  34
  35     // comparing two property instances
  36     struct PropertyCompareByName : public ::std::binary_function< css::beans::Property, css::beans::Property, bool >
  37     {
  38         bool operator() (const css::beans::Property& x, const css::beans::Property& y) const
  39         {
  40             return x.Name.compareTo(y.Name) < 0;
  41         }
  42     };
  43
  44 /// remove the property with the given name from the given sequence
  45 COMPHELPER_DLLPUBLIC void RemoveProperty(css::uno::Sequence<css::beans::Property>& seqProps, const OUString& _rPropName);
  46
  47 /** within the given property sequence, modify attributes of a special property
  48     @param  _rProps         the sequence of properties to search in
  49     @param  _sPropName      the name of the property which's attributes should be modified
  50     @param  _nAddAttrib     the attributes which should be added
  51     @param  _nRemoveAttrib  the attributes which should be removed
  52 */
  53 COMPHELPER_DLLPUBLIC void ModifyPropertyAttributes(css::uno::Sequence<css::beans::Property>& _rProps, const OUString& _sPropName, sal_Int16 _nAddAttrib, sal_Int16 _nRemoveAttrib);
  54
  55 /** check if the given set has the given property.
  56 */
  57 COMPHELPER_DLLPUBLIC bool hasProperty(const OUString& _rName, const css::uno::Reference<css::beans::XPropertySet>& _rxSet);
  58
  59 /** copy properties between property sets, in compliance with the property
  60     attributes of the target object
  61 */
  62 COMPHELPER_DLLPUBLIC void copyProperties(const css::uno::Reference<css::beans::XPropertySet>& _rxSource,
  63                     const css::uno::Reference<css::beans::XPropertySet>& _rxDest);
  64
  65 /** helper for implementing ::cppu::OPropertySetHelper::convertFastPropertyValue
  66     @param          _rConvertedValue    the conversion result (if successful)
  67     @param          _rOldValue          the old value of the property, calculated from _rCurrentValue
  68     @param          _rValueToSet        the new value which is about to be set
  69     @param          _rCurrentValue      the current value of the property
  70     @return         sal_True, if the value could be converted and has changed
  71                     sal_False, if the value could be converted and has not changed
  72     @exception      InvalidArgumentException thrown if the value could not be converted to the requested type (which is the template argument)
  73 */
  74 template <typename T>
  75 bool tryPropertyValue(css::uno::Any& /*out*/_rConvertedValue, css::uno::Any& /*out*/_rOldValue, const css::uno::Any& _rValueToSet, const T& _rCurrentValue)
  76 {
  77     bool bModified(false);
  78     T aNewValue = T();
  79     ::cppu::convertPropertyValue(aNewValue, _rValueToSet);
  80     if (aNewValue != _rCurrentValue)
  81     {
  82         _rConvertedValue <<= aNewValue;
  83         _rOldValue <<= _rCurrentValue;
  84         bModified = true;
  85     }
  86     return bModified;
  87 }
  88
  89 /** helper for implementing ::cppu::OPropertySetHelper::convertFastPropertyValue for enum values
  90     @param          _rConvertedValue    the conversion result (if successful)
  91     @param          _rOldValue          the old value of the property, calculated from _rCurrentValue
  92     @param          _rValueToSet        the new value which is about to be set
  93     @param          _rCurrentValue      the current value of the property
  94     @return         sal_True, if the value could be converted and has changed
  95                     sal_False, if the value could be converted and has not changed
  96     @exception      InvalidArgumentException thrown if the value could not be converted to the requested type (which is the template argument)
  97 */
  98 template <class ENUMTYPE>
  99 typename std::enable_if<std::is_enum<ENUMTYPE>::value, bool>::type
 100 tryPropertyValueEnum(css::uno::Any& /*out*/_rConvertedValue, css::uno::Any& /*out*/_rOldValue, const css::uno::Any& _rValueToSet, const ENUMTYPE& _rCurrentValue)
 101 {
 102     bool bModified(false);
 103     ENUMTYPE aNewValue;
 104     ::cppu::any2enum(aNewValue, _rValueToSet);
 105         // will throw an exception if not convertible
 106
 107     if (aNewValue != _rCurrentValue)
 108     {
 109         _rConvertedValue <<= aNewValue;
 110         _rOldValue <<= _rCurrentValue;
 111         bModified = true;
 112     }
 113     return bModified;
 114 }
 115
 116 /** helper for implementing ::cppu::OPropertySetHelper::convertFastPropertyValue
 117     @param          _rConvertedValue    the conversion result (if successful)
 118     @param          _rOldValue          the old value of the property, calculated from _rCurrentValue
 119     @param          _rValueToSet        the new value which is about to be set
 120     @param          _rCurrentValue      the current value of the property
 121     @param          _rExpectedType      the type which the property should have (if not void)
 122     @return         sal_True, if the value could be converted and has changed
 123                     sal_False, if the value could be converted and has not changed
 124     @exception      InvalidArgumentException thrown if the value could not be converted to the requested type (which is the template argument)
 125 */
 126 COMPHELPER_DLLPUBLIC bool tryPropertyValue(css::uno::Any& _rConvertedValue, css::uno::Any& _rOldValue, const css::uno::Any& _rValueToSet, const css::uno::Any& _rCurrentValue, const css::uno::Type& _rExpectedType);
 127
 128 }
 129
 130 #endif // INCLUDED_COMPHELPER_PROPERTY_HXX
 131
 132 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */