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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                 :            : 
      20                 :            : #ifndef INCLUDED_SLIDESHOW_ACCUMULATION_HXX
      21                 :            : #define INCLUDED_SLIDESHOW_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                 :          0 :         template< typename ValueType > ValueType accumulate( const ValueType&   rEndValue,
      48                 :            :                                                              sal_uInt32         nRepeatCount,
      49                 :            :                                                              const ValueType&   rCurrValue )
      50                 :            :         {
      51                 :          0 :             return nRepeatCount*rEndValue + rCurrValue;
      52                 :            :         }
      53                 :            : 
      54                 :            :         /// Specialization for non-addable enums/constant values
      55                 :          0 :         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                 :          0 :             return rCurrValue;
      61                 :            :         }
      62                 :            : 
      63                 :            :         /// Specialization for non-addable strings
      64                 :          0 :         template<> ::rtl::OUString accumulate< ::rtl::OUString >( const ::rtl::OUString&,
      65                 :            :                                                                   sal_uInt32,
      66                 :            :                                                                   const ::rtl::OUString&    rCurrValue )
      67                 :            :         {
      68                 :            :             // always return rCurrValue, it's impossible to add strings...
      69                 :          0 :             return rCurrValue;
      70                 :            :         }
      71                 :            : 
      72                 :            :         /// Specialization for non-addable bools
      73                 :          0 :         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                 :          0 :             return bCurrValue;
      80                 :            :         }
      81                 :            :     }
      82                 :            : }
      83                 :            : 
      84                 :            : #endif /* INCLUDED_SLIDESHOW_ACCUMULATION_HXX */
      85                 :            : 
      86                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */