comphelper/source/misc/listenernotification.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_comphelper.hxx"
  33 #include <comphelper/listenernotification.hxx>
  34
  35 /** === begin UNO includes === **/
  36 #include <com/sun/star/lang/DisposedException.hpp>
  37 /** === end UNO includes === **/
  38
  39 //........................................................................
  40 namespace comphelper
  41 {
  42 //........................................................................
  43
  44     using namespace ::com::sun::star::uno;
  45     using namespace ::com::sun::star::lang;
  46
  47     //====================================================================
  48     //= OListenerContainer
  49     //====================================================================
  50     //--------------------------------------------------------------------
  51     OListenerContainer::OListenerContainer( ::osl::Mutex& _rMutex )
  52         :m_aListeners( _rMutex )
  53     {
  54     }
  55
  56     OListenerContainer::~OListenerContainer() {}
  57
  58     //--------------------------------------------------------------------
  59     void OListenerContainer::impl_addListener( const Reference< XEventListener >& _rxListener )
  60     {
  61         OSL_PRECOND( _rxListener.is(), "OListenerContainer::impl_addListener: a NULL listener?!" );
  62         if ( _rxListener.is() )
  63             m_aListeners.addInterface( _rxListener );
  64     }
  65
  66     //--------------------------------------------------------------------
  67     void OListenerContainer::impl_removeListener( const Reference< XEventListener >& _rxListener )
  68     {
  69 #if OSL_DEBUG_LEVEL > 0
  70         ::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
  71         bool bFound = false;
  72         while ( aIter.hasMoreElements() && !bFound )
  73         {
  74             bFound = ( Reference< XInterface >( aIter.next() ) == _rxListener );
  75         }
  76         OSL_ENSURE( bFound, "OListenerContainer::impl_removeListener: sure your listener handling is correct? The given listener is not registered!" );
  77 #endif
  78         m_aListeners.removeInterface( _rxListener );
  79     }
  80
  81     //--------------------------------------------------------------------
  82     void OListenerContainer::disposing( const EventObject& _rEventSource )
  83     {
  84         m_aListeners.disposeAndClear( _rEventSource );
  85     }
  86
  87     //--------------------------------------------------------------------
  88     void OListenerContainer::clear()
  89     {
  90         m_aListeners.clear();
  91     }
  92
  93     //--------------------------------------------------------------------
  94     bool OListenerContainer::impl_notify( const EventObject& _rEvent ) SAL_THROW(( Exception ))
  95     {
  96         ::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
  97         bool bCancelled = false;
  98         while ( aIter.hasMoreElements() && !bCancelled )
  99         {
 100             Reference< XEventListener > xListener( static_cast< XEventListener* >( aIter.next() ) );
 101             if ( !xListener.is() )
 102                 continue;
 103
 104             try
 105             {
 106                 bCancelled = !implNotify( xListener, _rEvent );
 107             }
 108             catch( const DisposedException& e )
 109             {
 110                 // DisposedExceptions from the listener might indicate a
 111                 // broken connection to a different environment.
 112
 113                 OSL_ENSURE( e.Context.is(), "OListenerContainer::impl_notify: caught dispose exception with empty Context field" );
 114
 115                 // If the exception stems from the listener then remove it
 116                 // from the list of listeners.  If the Context field of the
 117                 // exception is empty this is interpreted to indicate the
 118                 // listener as well.
 119                 if ( e.Context == xListener || !e.Context.is() )
 120                     aIter.remove();
 121             }
 122         }
 123
 124         return !bCancelled;
 125     }
 126
 127 //........................................................................
 128 }   // namespace comphelper
 129 //........................................................................
 130