slideshow/source/engine/activities/accumulation.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACCUMULATION_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACCUMULATION_HXX
  22
  23 #include <sal/types.h>
  24 #include <rtl/ustring.hxx>
  25
  26
  27 namespace slideshow
  28 {
  29     namespace internal
  30     {
  31         /** Generic accumulation.
  32
  33             This template handles value accumulation across repeated
  34             effect runs: returned is the end value times the repeat
  35             count, plus the current value.
  36
  37             @param rEndValue
  38             End value of the simple animation.
  39
  40             @param nRepeatCount
  41             Number of completed repeats (i.e. 0 during the first
  42             effect run)
  43
  44             @param rCurrValue
  45             Current animation value
  46          */
  47         template< typename ValueType > ValueType accumulate( const ValueType&   rEndValue,
  48                                                              sal_uInt32         nRepeatCount,
  49                                                              const ValueType&   rCurrValue )
  50         {
  51             return nRepeatCount*rEndValue + rCurrValue;
  52         }
  53
  54         /// Specialization for non-addable enums/constant values
  55         template<> sal_Int16 accumulate< sal_Int16 >( const sal_Int16&,
  56                                                       sal_uInt32,
  57                                                       const sal_Int16&  rCurrValue )
  58         {
  59             // always return rCurrValue, it's forbidden to add enums/constant values...
  60             return rCurrValue;
  61         }
  62
  63         /// Specialization for non-addable strings
  64         template<> OUString accumulate< OUString >( const OUString&,
  65                                                                   sal_uInt32,
  66                                                                   const OUString&    rCurrValue )
  67         {
  68             // always return rCurrValue, it's impossible to add strings...
  69             return rCurrValue;
  70         }
  71
  72         /// Specialization for non-addable bools
  73         template<> bool accumulate< bool >( const bool&,
  74                                             sal_uInt32,
  75                                             const bool&     bCurrValue )
  76         {
  77             // always return bCurrValue, SMIL spec requires to ignore
  78             // cumulative behaviour for bools.
  79             return bCurrValue;
  80         }
  81     }
  82 }
  83
  84 #endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACCUMULATION_HXX
  85
  86 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */