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             : 
      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           0 :     OWeakListenerAdapterBase::~OWeakListenerAdapterBase()
      33             :     {
      34           0 :     }
      35             : 
      36           0 :     OWeakEventListenerAdapter::OWeakEventListenerAdapter( Reference< XWeak > _rxListener, Reference< XComponent > _rxBroadcaster )
      37           0 :         :OWeakEventListenerAdapter_Base( _rxListener, _rxBroadcaster )
      38             :     {
      39             :         // add ourself as listener to the broadcaster
      40             :         OSL_ENSURE( _rxBroadcaster.is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid broadcaster!" );
      41           0 :         if ( _rxBroadcaster.is() )
      42             :         {
      43           0 :             osl_atomic_increment( &m_refCount );
      44             :             {
      45           0 :                 _rxBroadcaster->addEventListener( this );
      46             :             }
      47           0 :             osl_atomic_decrement( &m_refCount );
      48             :             OSL_ENSURE( m_refCount > 0, "OWeakEventListenerAdapter::OWeakEventListenerAdapter: oops - not to be used with implementations which hold their listeners weak!" );
      49             :                 // the one and only reason for this adapter class (A) is to add as listener to a component (C) which
      50             :                 // holds its listeners hard, and forward all calls then to another listener (L) which is
      51             :                 // held weak by A.
      52             :                 // Now if C holds listeners weak, then we do not need A, we can add L directly to C.
      53             :         }
      54             : 
      55             :         OSL_ENSURE( getListener().is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid listener (does not support the XEventListener interface)!" );
      56           0 :     }
      57             : 
      58             : 
      59           0 :     void SAL_CALL OWeakEventListenerAdapter::disposing( )
      60             :     {
      61           0 :         Reference< XComponent > xBroadcaster( getBroadcaster( ), UNO_QUERY );
      62             :         OSL_ENSURE( xBroadcaster.is(), "OWeakEventListenerAdapter::disposing: broadcaster is invalid in the meantime! How this?" );
      63           0 :         if ( xBroadcaster.is() )
      64             :         {
      65           0 :             xBroadcaster->removeEventListener( this );
      66             :         }
      67             : 
      68           0 :         resetListener();
      69           0 :     }
      70             : 
      71             : 
      72             : }   // namespace comphelper
      73             : 
      74             : 
      75             : 
      76             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */