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