comphelper/source/misc/listenernotification.cxx

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  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_comphelper.hxx"
  30 #include <comphelper/listenernotification.hxx>
  31
  32 /** === begin UNO includes === **/
  33 #include <com/sun/star/lang/DisposedException.hpp>
  34 /** === end UNO includes === **/
  35
  36 //........................................................................
  37 namespace comphelper
  38 {
  39 //........................................................................
  40
  41     using namespace ::com::sun::star::uno;
  42     using namespace ::com::sun::star::lang;
  43
  44     //====================================================================
  45     //= OListenerContainer
  46     //====================================================================
  47     //--------------------------------------------------------------------
  48     OListenerContainer::OListenerContainer( ::osl::Mutex& _rMutex )
  49         :m_aListeners( _rMutex )
  50     {
  51     }
  52
  53     OListenerContainer::~OListenerContainer() {}
  54
  55     //--------------------------------------------------------------------
  56     void OListenerContainer::impl_addListener( const Reference< XEventListener >& _rxListener )
  57     {
  58         OSL_PRECOND( _rxListener.is(), "OListenerContainer::impl_addListener: a NULL listener?!" );
  59         if ( _rxListener.is() )
  60             m_aListeners.addInterface( _rxListener );
  61     }
  62
  63     //--------------------------------------------------------------------
  64     void OListenerContainer::impl_removeListener( const Reference< XEventListener >& _rxListener )
  65     {
  66 #if OSL_DEBUG_LEVEL > 0
  67         ::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
  68         bool bFound = false;
  69         while ( aIter.hasMoreElements() && !bFound )
  70         {
  71             bFound = ( Reference< XInterface >( aIter.next() ) == _rxListener );
  72         }
  73         OSL_ENSURE( bFound, "OListenerContainer::impl_removeListener: sure your listener handling is correct? The given listener is not registered!" );
  74 #endif
  75         m_aListeners.removeInterface( _rxListener );
  76     }
  77
  78     //--------------------------------------------------------------------
  79     void OListenerContainer::disposing( const EventObject& _rEventSource )
  80     {
  81         m_aListeners.disposeAndClear( _rEventSource );
  82     }
  83
  84     //--------------------------------------------------------------------
  85     void OListenerContainer::clear()
  86     {
  87         m_aListeners.clear();
  88     }
  89
  90     //--------------------------------------------------------------------
  91     bool OListenerContainer::impl_notify( const EventObject& _rEvent ) SAL_THROW(( Exception ))
  92     {
  93         ::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
  94         bool bCancelled = false;
  95         while ( aIter.hasMoreElements() && !bCancelled )
  96         {
  97             Reference< XEventListener > xListener( static_cast< XEventListener* >( aIter.next() ) );
  98             if ( !xListener.is() )
  99                 continue;
 100
 101             try
 102             {
 103                 bCancelled = !implNotify( xListener, _rEvent );
 104             }
 105             catch( const DisposedException& e )
 106             {
 107                 // DisposedExceptions from the listener might indicate a
 108                 // broken connection to a different environment.
 109
 110                 OSL_ENSURE( e.Context.is(), "OListenerContainer::impl_notify: caught dispose exception with empty Context field" );
 111
 112                 // If the exception stems from the listener then remove it
 113                 // from the list of listeners.  If the Context field of the
 114                 // exception is empty this is interpreted to indicate the
 115                 // listener as well.
 116                 if ( e.Context == xListener || !e.Context.is() )
 117                     aIter.remove();
 118             }
 119         }
 120
 121         return !bCancelled;
 122     }
 123
 124 //........................................................................
 125 }   // namespace comphelper
 126 //........................................................................
 127