comphelper/source/misc/SelectionMultiplex.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
  21 #include <comphelper/SelectionMultiplex.hxx>
  22 #include <osl/diagnose.h>
  23
  24 //.........................................................................
  25 namespace comphelper
  26 {
  27 //.........................................................................
  28
  29 using namespace ::com::sun::star::uno;
  30 using namespace ::com::sun::star::lang;
  31 using namespace ::com::sun::star::view;
  32
  33 //========================================================================
  34 //= OSelectionChangeListener
  35 //========================================================================
  36 //------------------------------------------------------------------------
  37 OSelectionChangeListener::~OSelectionChangeListener()
  38 {
  39     if (m_pAdapter)
  40         m_pAdapter->dispose();
  41 }
  42
  43 //------------------------------------------------------------------
  44 void OSelectionChangeListener::_disposing(const EventObject&) throw( RuntimeException)
  45 {
  46     // nothing to do here
  47 }
  48
  49 //------------------------------------------------------------------
  50 void OSelectionChangeListener::setAdapter(OSelectionChangeMultiplexer* pAdapter)
  51 {
  52     if (m_pAdapter)
  53     {
  54         ::osl::MutexGuard aGuard(m_rMutex);
  55         m_pAdapter->release();
  56         m_pAdapter = NULL;
  57     }
  58
  59     if (pAdapter)
  60     {
  61         ::osl::MutexGuard aGuard(m_rMutex);
  62         m_pAdapter = pAdapter;
  63         m_pAdapter->acquire();
  64     }
  65 }
  66
  67 //========================================================================
  68 //= OSelectionChangeMultiplexer
  69 //========================================================================
  70 //------------------------------------------------------------------
  71 OSelectionChangeMultiplexer::OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  Reference< XSelectionSupplier>& _rxSet, sal_Bool _bAutoReleaseSet)
  72             :m_xSet(_rxSet)
  73             ,m_pListener(_pListener)
  74             ,m_nLockCount(0)
  75             ,m_bListening(sal_False)
  76             ,m_bAutoSetRelease(_bAutoReleaseSet)
  77 {
  78     m_pListener->setAdapter(this);
  79     osl_atomic_increment(&m_refCount);
  80     {
  81         Reference< XSelectionChangeListener> xPreventDelete(this);
  82         m_xSet->addSelectionChangeListener(xPreventDelete);
  83     }
  84     osl_atomic_decrement(&m_refCount);
  85 }
  86
  87 //------------------------------------------------------------------
  88 OSelectionChangeMultiplexer::~OSelectionChangeMultiplexer()
  89 {
  90 }
  91
  92 //------------------------------------------------------------------
  93 void OSelectionChangeMultiplexer::lock()
  94 {
  95     ++m_nLockCount;
  96 }
  97
  98 //------------------------------------------------------------------
  99 void OSelectionChangeMultiplexer::unlock()
 100 {
 101     --m_nLockCount;
 102 }
 103
 104 //------------------------------------------------------------------
 105 void OSelectionChangeMultiplexer::dispose()
 106 {
 107     if (m_bListening)
 108     {
 109         Reference< XSelectionChangeListener> xPreventDelete(this);
 110
 111         m_xSet->removeSelectionChangeListener(xPreventDelete);
 112
 113         m_pListener->setAdapter(NULL);
 114
 115         m_pListener = NULL;
 116         m_bListening = sal_False;
 117
 118         if (m_bAutoSetRelease)
 119             m_xSet = NULL;
 120     }
 121 }
 122
 123 // XEventListener
 124 //------------------------------------------------------------------
 125 void SAL_CALL OSelectionChangeMultiplexer::disposing( const  EventObject& _rSource) throw( RuntimeException)
 126 {
 127     if (m_pListener)
 128     {
 129          // tell the listener
 130         if (!locked())
 131             m_pListener->_disposing(_rSource);
 132         // disconnect the listener
 133         if (m_pListener)    // may have been reset whilest calling into _disposing
 134             m_pListener->setAdapter(NULL);
 135     }
 136
 137     m_pListener = NULL;
 138     m_bListening = sal_False;
 139
 140     if (m_bAutoSetRelease)
 141         m_xSet = NULL;
 142 }
 143
 144 // XSelectionChangeListener
 145 //------------------------------------------------------------------
 146 void SAL_CALL OSelectionChangeMultiplexer::selectionChanged( const  EventObject& _rEvent ) throw( RuntimeException)
 147 {
 148     if (m_pListener && !locked())
 149         m_pListener->_selectionChanged(_rEvent);
 150 }
 151 //.........................................................................
 152 }
 153 //.........................................................................
 154
 155 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */