84 lines
3.3 KiB
C++
84 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACCUMULATION_HXX
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#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACCUMULATION_HXX
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#include <sal/types.h>
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#include <rtl/ustring.hxx>
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namespace slideshow::internal
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{
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/** Generic accumulation.
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This template handles value accumulation across repeated
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effect runs: returned is the end value times the repeat
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count, plus the current value.
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@param rEndValue
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End value of the simple animation.
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@param nRepeatCount
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Number of completed repeats (i.e. 0 during the first
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effect run)
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@param rCurrValue
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Current animation value
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*/
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template< typename ValueType > ValueType accumulate( const ValueType& rEndValue,
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sal_uInt32 nRepeatCount,
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const ValueType& rCurrValue )
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{
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return nRepeatCount*rEndValue + rCurrValue;
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}
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/// Specialization for non-addable enums/constant values
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template<> sal_Int16 accumulate< sal_Int16 >( const sal_Int16&,
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sal_uInt32,
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const sal_Int16& rCurrValue )
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{
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// always return rCurrValue, it's forbidden to add enums/constant values...
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return rCurrValue;
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}
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/// Specialization for non-addable strings
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template<> OUString accumulate< OUString >( const OUString&,
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sal_uInt32,
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const OUString& rCurrValue )
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{
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// always return rCurrValue, it's impossible to add strings...
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return rCurrValue;
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}
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/// Specialization for non-addable bools
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template<> bool accumulate< bool >( const bool&,
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sal_uInt32,
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const bool& bCurrValue )
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{
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// always return bCurrValue, SMIL spec requires to ignore
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// cumulative behaviour for bools.
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return bCurrValue;
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}
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}
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#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACCUMULATION_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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