comphelper/source/misc/listenernotification.cxx

   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/listenernotification.hxx>
  21
  22 #include <com/sun/star/lang/DisposedException.hpp>
  23
  24
  25 namespace comphelper
  26 {
  27
  28
  29     using namespace ::com::sun::star::uno;
  30     using namespace ::com::sun::star::lang;
  31
  32     OListenerContainer::OListenerContainer( ::osl::Mutex& _rMutex )
  33         :m_aListeners( _rMutex )
  34     {
  35     }
  36
  37     OListenerContainer::~OListenerContainer() {}
  38
  39
  40     void OListenerContainer::impl_addListener( const Reference< XEventListener >& _rxListener )
  41     {
  42         OSL_PRECOND( _rxListener.is(), "OListenerContainer::impl_addListener: a NULL listener?!" );
  43         if ( _rxListener.is() )
  44             m_aListeners.addInterface( _rxListener );
  45     }
  46
  47
  48     void OListenerContainer::impl_removeListener( const Reference< XEventListener >& _rxListener )
  49     {
  50 #if OSL_DEBUG_LEVEL > 0
  51         ::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
  52         bool bFound = false;
  53         while ( aIter.hasMoreElements() && !bFound )
  54         {
  55             bFound = ( Reference< XInterface >( aIter.next() ) == _rxListener );
  56         }
  57         OSL_ENSURE( bFound, "OListenerContainer::impl_removeListener: sure your listener handling is correct? The given listener is not registered!" );
  58 #endif
  59         m_aListeners.removeInterface( _rxListener );
  60     }
  61
  62
  63     void OListenerContainer::disposing( const EventObject& _rEventSource )
  64     {
  65         m_aListeners.disposeAndClear( _rEventSource );
  66     }
  67
  68
  69     void OListenerContainer::clear()
  70     {
  71         m_aListeners.clear();
  72     }
  73
  74
  75     bool OListenerContainer::impl_notify( const EventObject& _rEvent )
  76     {
  77         ::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
  78         bool bCancelled = false;
  79         while ( aIter.hasMoreElements() && !bCancelled )
  80         {
  81             Reference< XEventListener > xListener( static_cast< XEventListener* >( aIter.next() ) );
  82             if ( !xListener.is() )
  83                 continue;
  84
  85             try
  86             {
  87                 bCancelled = !implNotify( xListener, _rEvent );
  88             }
  89             catch( const DisposedException& e )
  90             {
  91                 // DisposedExceptions from the listener might indicate a
  92                 // broken connection to a different environment.
  93
  94                 OSL_ENSURE( e.Context.is(), "OListenerContainer::impl_notify: caught dispose exception with empty Context field" );
  95
  96                 // If the exception stems from the listener then remove it
  97                 // from the list of listeners.  If the Context field of the
  98                 // exception is empty this is interpreted to indicate the
  99                 // listener as well.
 100                 if ( e.Context == xListener || !e.Context.is() )
 101                     aIter.remove();
 102             }
 103         }
 104
 105         return !bCancelled;
 106     }
 107
 108
 109 }   // namespace comphelper
 110
 111
 112 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */