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| -rw-r--r-- | include/oox/helper/refmap.hxx | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/include/oox/helper/refmap.hxx b/include/oox/helper/refmap.hxx new file mode 100644 index 000000000..2e63af512 --- /dev/null +++ b/include/oox/helper/refmap.hxx @@ -0,0 +1,144 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_OOX_HELPER_REFMAP_HXX +#define INCLUDED_OOX_HELPER_REFMAP_HXX + +#include <algorithm> +#include <functional> +#include <map> +#include <memory> + +namespace oox { + + +/** Template for a map of ref-counted objects with additional accessor functions. + + An instance of the class RefMap< Type > stores elements of the type + std::shared_ptr< Type >. The new accessor functions has() and get() + work correctly for nonexisting keys, there is no need to check the passed + key before. + */ +template< typename KeyType, typename ObjType, typename CompType = std::less< KeyType > > +class RefMap : public std::map< KeyType, std::shared_ptr< ObjType >, CompType > +{ +public: + typedef std::map< KeyType, std::shared_ptr< ObjType >, CompType > container_type; + typedef typename container_type::key_type key_type; + typedef typename container_type::mapped_type mapped_type; + typedef typename container_type::value_type value_type; + typedef typename container_type::key_compare key_compare; + +public: + /** Returns true, if the object associated to the passed key exists. + Returns false, if the key exists but points to an empty reference. */ + bool has( key_type nKey ) const + { + const mapped_type* pxRef = getRef( nKey ); + return pxRef && pxRef->get(); + } + + /** Returns a reference to the object associated to the passed key, or an + empty reference on error. */ + mapped_type get( key_type nKey ) const + { + if( const mapped_type* pxRef = getRef( nKey ) ) return *pxRef; + return mapped_type(); + } + + /** Calls the passed functor for every contained object, automatically + skips all elements that are empty references. */ + template< typename FunctorType > + void forEach( const FunctorType& rFunctor ) const + { + std::for_each( this->begin(), this->end(), ForEachFunctor< FunctorType >( rFunctor ) ); + } + + /** Calls the passed member function of ObjType on every contained object, + automatically skips all elements that are empty references. */ + template< typename FuncType > + void forEachMem( FuncType pFunc ) const + { + forEach( ::std::bind( pFunc, std::placeholders::_1 ) ); + } + + /** Calls the passed member function of ObjType on every contained object, + automatically skips all elements that are empty references. */ + template< typename FuncType, typename ParamType1, typename ParamType2 > + void forEachMem( FuncType pFunc, ParamType1 aParam1, ParamType2 aParam2 ) const + { + forEach( ::std::bind( pFunc, std::placeholders::_1, aParam1, aParam2 ) ); + } + + /** Calls the passed member function of ObjType on every contained object, + automatically skips all elements that are empty references. */ + template< typename FuncType, typename ParamType1, typename ParamType2, typename ParamType3 > + void forEachMem( FuncType pFunc, ParamType1 aParam1, ParamType2 aParam2, ParamType3 aParam3 ) const + { + forEach( ::std::bind( pFunc, std::placeholders::_1, aParam1, aParam2, aParam3 ) ); + } + + + /** Calls the passed functor for every contained object. Passes the key as + first argument and the object reference as second argument to rFunctor. */ + template< typename FunctorType > + void forEachWithKey( const FunctorType& rFunctor ) const + { + std::for_each( this->begin(), this->end(), ForEachFunctorWithKey< FunctorType >( rFunctor ) ); + } + + /** Calls the passed member function of ObjType on every contained object. + Passes the object key as argument to the member function. */ + template< typename FuncType > + void forEachMemWithKey( FuncType pFunc ) const + { + forEachWithKey( ::std::bind( pFunc, std::placeholders::_2, std::placeholders::_1 ) ); + } + + +private: + template< typename FunctorType > + struct ForEachFunctor + { + FunctorType maFunctor; + explicit ForEachFunctor( const FunctorType& rFunctor ) : maFunctor( rFunctor ) {} + void operator()( const value_type& rValue ) { if( rValue.second.get() ) maFunctor( *rValue.second ); } + }; + + template< typename FunctorType > + struct ForEachFunctorWithKey + { + FunctorType maFunctor; + explicit ForEachFunctorWithKey( const FunctorType& rFunctor ) : maFunctor( rFunctor ) {} + void operator()( const value_type& rValue ) { if( rValue.second.get() ) maFunctor( rValue.first, *rValue.second ); } + }; + + const mapped_type* getRef( key_type nKey ) const + { + typename container_type::const_iterator aIt = this->find( nKey ); + return (aIt == this->end()) ? nullptr : &aIt->second; + } +}; + + +} // namespace oox + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |