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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                 :            : #include <comphelper/weakeventlistener.hxx>
      21                 :            : #include <osl/diagnose.h>
      22                 :            : 
      23                 :            : 
      24                 :            : //.........................................................................
      25                 :            : namespace comphelper
      26                 :            : {
      27                 :            : //.........................................................................
      28                 :            : 
      29                 :            :     using namespace ::com::sun::star::uno;
      30                 :            :     using namespace ::com::sun::star::lang;
      31                 :            : 
      32                 :            :     //=====================================================================
      33                 :            :     //= OWeakListenerAdapter
      34                 :            :     //=====================================================================
      35                 :            :     //---------------------------------------------------------------------
      36         [ #  # ]:          0 :     OWeakListenerAdapterBase::~OWeakListenerAdapterBase()
      37                 :            :     {
      38         [ #  # ]:          0 :     }
      39                 :            : 
      40                 :            :     //=====================================================================
      41                 :            :     //= OWeakEventListenerAdapter
      42                 :            :     //=====================================================================
      43                 :            :     //---------------------------------------------------------------------
      44                 :          0 :     OWeakEventListenerAdapter::OWeakEventListenerAdapter( Reference< XWeak > _rxListener, Reference< XComponent > _rxBroadcaster )
      45                 :          0 :         :OWeakEventListenerAdapter_Base( _rxListener, _rxBroadcaster )
      46                 :            :     {
      47                 :            :         // add ourself as listener to the broadcaster
      48                 :            :         OSL_ENSURE( _rxBroadcaster.is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid broadcaster!" );
      49         [ #  # ]:          0 :         if ( _rxBroadcaster.is() )
      50                 :            :         {
      51         [ #  # ]:          0 :             osl_incrementInterlockedCount( &m_refCount );
      52                 :            :             {
      53 [ #  # ][ #  # ]:          0 :                 _rxBroadcaster->addEventListener( this );
                 [ #  # ]
      54                 :            :             }
      55         [ #  # ]:          0 :             osl_decrementInterlockedCount( &m_refCount );
      56                 :            :             OSL_ENSURE( m_refCount > 0, "OWeakEventListenerAdapter::OWeakEventListenerAdapter: oops - not to be used with implementations which hold their listeners weak!" );
      57                 :            :                 // the one and only reason for this adapter class (A) is to add as listener to a component (C) which
      58                 :            :                 // holds its listeners hard, and forward all calls then to another listener (L) which is
      59                 :            :                 // held weak by A.
      60                 :            :                 // Now if C holds listeners weak, then we do not need A, we can add L directly to C.
      61                 :            :         }
      62                 :            : 
      63                 :            :         OSL_ENSURE( getListener().is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid listener (does not support the XEventListener interface)!" );
      64                 :          0 :     }
      65                 :            : 
      66                 :            :     //---------------------------------------------------------------------
      67                 :          0 :     void SAL_CALL OWeakEventListenerAdapter::disposing( )
      68                 :            :     {
      69         [ #  # ]:          0 :         Reference< XComponent > xBroadcaster( getBroadcaster( ), UNO_QUERY );
      70                 :            :         OSL_ENSURE( xBroadcaster.is(), "OWeakEventListenerAdapter::disposing: broadcaster is invalid in the meantime! How this?" );
      71         [ #  # ]:          0 :         if ( xBroadcaster.is() )
      72                 :            :         {
      73 [ #  # ][ #  # ]:          0 :             xBroadcaster->removeEventListener( this );
                 [ #  # ]
      74                 :            :         }
      75                 :            : 
      76         [ #  # ]:          0 :         resetListener();
      77                 :          0 :     }
      78                 :            : 
      79                 :            : //.........................................................................
      80                 :            : }   // namespace comphelper
      81                 :            : //.........................................................................
      82                 :            : 
      83                 :            : 
      84                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */