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