LCOV - code coverage report
Current view: top level - libreoffice/slideshow/source/inc - listenercontainerimpl.hxx (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 0 45 0.0 %
Date: 2012-12-27 Functions: 0 51 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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             : #ifndef INCLUDED_SLIDESHOW_LISTENERCONTAINERIMPL_HXX
      20             : #define INCLUDED_SLIDESHOW_LISTENERCONTAINERIMPL_HXX
      21             : 
      22             : #include <sal/config.h>
      23             : #include <boost/weak_ptr.hpp>
      24             : 
      25             : namespace slideshow {
      26             : namespace internal {
      27             : 
      28             : ////////////////////////////////////////////////////////////////////////////
      29             : 
      30           0 : struct EmptyBase
      31             : {
      32           0 :     struct EmptyGuard{ explicit EmptyGuard(EmptyBase) {} };
      33             :     struct EmptyClearableGuard
      34             :     {
      35           0 :         explicit EmptyClearableGuard(EmptyBase) {}
      36           0 :         void clear() {}
      37             :         void reset() {}
      38             :     };
      39             : 
      40             :     typedef EmptyGuard           Guard;
      41             :     typedef EmptyClearableGuard ClearableGuard;
      42             : };
      43             : 
      44             : class MutexBase
      45             : {
      46             : public:
      47             :     struct Guard : public osl::MutexGuard
      48             :     {
      49             :         explicit Guard(MutexBase const& rBase) :
      50             :             osl::MutexGuard(rBase.maMutex)
      51             :         {}
      52             :     };
      53             :     struct ClearableGuard : public osl::ClearableMutexGuard
      54             :     {
      55             :         explicit ClearableGuard(MutexBase const& rBase) :
      56             :             osl::ClearableMutexGuard(rBase.maMutex)
      57             :         {}
      58             :     };
      59             : 
      60             :     mutable osl::Mutex maMutex;
      61             : };
      62             : 
      63             : ////////////////////////////////////////////////////////////////////////////
      64             : 
      65             : template< typename result_type, typename ListenerTargetT > struct FunctionApply
      66             : {
      67           0 :     template<typename FuncT> static bool apply(
      68             :         FuncT           func,
      69             :         ListenerTargetT const& rArg )
      70             :     {
      71           0 :         return func(rArg);
      72             :     }
      73             : };
      74             : 
      75             : template<typename ListenerTargetT> struct FunctionApply<void,ListenerTargetT>
      76             : {
      77           0 :     template<typename FuncT> static bool apply(
      78             :         FuncT                  func,
      79             :         ListenerTargetT const& rArg )
      80             :     {
      81           0 :         func(rArg);
      82           0 :         return true;
      83             :     }
      84             : };
      85             : 
      86             : ////////////////////////////////////////////////////////////////////////////
      87             : 
      88             : template< typename ListenerT > struct ListenerOperations
      89             : {
      90             :     /// Notify a single one of the listeners
      91             :     template< typename ContainerT,
      92             :               typename FuncT >
      93           0 :     static bool notifySingleListener( ContainerT& rContainer,
      94             :                                       FuncT       func )
      95             :     {
      96           0 :         const typename ContainerT::const_iterator aEnd( rContainer.end() );
      97             : 
      98             :         // true: a handler in this queue processed the event
      99             :         // false: no handler in this queue finally processed the event
     100             :         return (std::find_if( rContainer.begin(),
     101             :                               aEnd,
     102           0 :                               func ) != aEnd);
     103             :     }
     104             : 
     105             :     /// Notify all listeners
     106             :     template< typename ContainerT,
     107             :               typename FuncT >
     108           0 :     static bool notifyAllListeners( ContainerT& rContainer,
     109             :                                     FuncT       func )
     110             :     {
     111           0 :         bool bRet(false);
     112           0 :         typename ContainerT::const_iterator       aCurr( rContainer.begin() );
     113           0 :         typename ContainerT::const_iterator const aEnd ( rContainer.end() );
     114           0 :         while( aCurr != aEnd )
     115             :         {
     116           0 :             if( FunctionApply< typename FuncT::result_type,
     117             :                                typename ContainerT::value_type >::apply(
     118             :                                    func,
     119             :                                    *aCurr) )
     120             :             {
     121           0 :                 bRet = true;
     122             :             }
     123             : 
     124           0 :             ++aCurr;
     125             :         }
     126             : 
     127             :         // true: at least one handler returned true
     128             :         // false: not a single handler returned true
     129           0 :         return bRet;
     130             :     }
     131             : 
     132             :     /// Prune container from deceased listeners
     133             :     template< typename ContainerT >
     134           0 :     static void pruneListeners( ContainerT&, size_t )
     135             :     {
     136           0 :     }
     137             : };
     138             : 
     139             : // specializations for weak_ptr
     140             : // ----------------------------
     141             : template< typename ListenerTargetT >
     142             : struct ListenerOperations< boost::weak_ptr<ListenerTargetT> >
     143             : {
     144             :     template< typename ContainerT,
     145             :               typename FuncT >
     146             :     static bool notifySingleListener( ContainerT& rContainer,
     147             :                                       FuncT       func )
     148             :     {
     149             :         typename ContainerT::const_iterator       aCurr( rContainer.begin() );
     150             :         typename ContainerT::const_iterator const aEnd ( rContainer.end() );
     151             :         while( aCurr != aEnd )
     152             :         {
     153             :             boost::shared_ptr<ListenerTargetT> pListener( aCurr->lock() );
     154             : 
     155             :             if( pListener && func(pListener) )
     156             :                 return true;
     157             : 
     158             :             ++aCurr;
     159             :         }
     160             : 
     161             :         return false;
     162             :     }
     163             : 
     164             :     template< typename ContainerT,
     165             :               typename FuncT >
     166           0 :     static bool notifyAllListeners( ContainerT& rContainer,
     167             :                                     FuncT       func )
     168             :     {
     169           0 :         bool bRet(false);
     170           0 :         typename ContainerT::const_iterator       aCurr( rContainer.begin() );
     171           0 :         typename ContainerT::const_iterator const aEnd ( rContainer.end() );
     172           0 :         while( aCurr != aEnd )
     173             :         {
     174           0 :             boost::shared_ptr<ListenerTargetT> pListener( aCurr->lock() );
     175             : 
     176           0 :             if( pListener.get() &&
     177             :                 FunctionApply< typename FuncT::result_type,
     178             :                                boost::shared_ptr<ListenerTargetT> >::apply(func,pListener) )
     179             :             {
     180           0 :                 bRet = true;
     181             :             }
     182             : 
     183           0 :             ++aCurr;
     184             :         }
     185             : 
     186           0 :         return bRet;
     187             :     }
     188             : 
     189             :     template< typename ContainerT >
     190           0 :     static void pruneListeners( ContainerT& rContainer,
     191             :                                 size_t      nSizeThreshold )
     192             :     {
     193           0 :         if( rContainer.size() <= nSizeThreshold )
     194           0 :             return;
     195             : 
     196           0 :         ContainerT aAliveListeners;
     197           0 :         aAliveListeners.reserve(rContainer.size());
     198             : 
     199           0 :         typename ContainerT::const_iterator       aCurr( rContainer.begin() );
     200           0 :         typename ContainerT::const_iterator const aEnd ( rContainer.end() );
     201           0 :         while( aCurr != aEnd )
     202             :         {
     203           0 :             if( !aCurr->expired() )
     204           0 :                 aAliveListeners.push_back( *aCurr );
     205             : 
     206           0 :             ++aCurr;
     207             :         }
     208             : 
     209           0 :         std::swap( rContainer, aAliveListeners );
     210             :     }
     211             : };
     212             : 
     213             : } // namespace internal
     214             : } // namespace Presentation
     215             : 
     216             : #endif /* INCLUDED_SLIDESHOW_LISTENERCONTAINERIMPL_HXX */
     217             : 
     218             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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