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 <com/sun/star/view/XSelectionSupplier.hpp>
  23
  24 namespace comphelper
  25 {
  26
  27
  28 using namespace ::com::sun::star::uno;
  29 using namespace ::com::sun::star::lang;
  30 using namespace ::com::sun::star::view;
  31
  32 OSelectionChangeListener::~OSelectionChangeListener()
  33 {
  34 }
  35
  36
  37 void OSelectionChangeListener::_disposing(const EventObject&)
  38 {
  39     // nothing to do here
  40 }
  41
  42
  43 OSelectionChangeMultiplexer::OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  Reference< XSelectionSupplier>& _rxSet)
  44             :m_xSet(_rxSet)
  45             ,m_pListener(_pListener)
  46             ,m_nLockCount(0)
  47 {
  48     osl_atomic_increment(&m_refCount);
  49     {
  50         Reference< XSelectionChangeListener> xPreventDelete(this);
  51         m_xSet->addSelectionChangeListener(xPreventDelete);
  52     }
  53     osl_atomic_decrement(&m_refCount);
  54 }
  55
  56
  57 OSelectionChangeMultiplexer::~OSelectionChangeMultiplexer()
  58 {
  59 }
  60
  61
  62 void OSelectionChangeMultiplexer::lock()
  63 {
  64     ++m_nLockCount;
  65 }
  66
  67
  68 void OSelectionChangeMultiplexer::unlock()
  69 {
  70     --m_nLockCount;
  71 }
  72
  73
  74 // XEventListener
  75
  76 void SAL_CALL OSelectionChangeMultiplexer::disposing( const  EventObject& _rSource)
  77 {
  78     if (m_pListener)
  79     {
  80          // tell the listener
  81         if (!locked())
  82             m_pListener->_disposing(_rSource);
  83     }
  84
  85     m_pListener = nullptr;
  86
  87     m_xSet = nullptr;
  88 }
  89
  90 // XSelectionChangeListener
  91
  92 void SAL_CALL OSelectionChangeMultiplexer::selectionChanged( const  EventObject& _rEvent )
  93 {
  94     if (m_pListener && !locked())
  95         m_pListener->_selectionChanged(_rEvent);
  96 }
  97
  98 void OSelectionChangeMultiplexer::dispose()
  99 {
 100     osl_atomic_increment(&m_refCount);
 101     {
 102         Reference< XSelectionChangeListener> xPreventDelete(this);
 103         if(m_xSet.is())
 104             m_xSet->removeSelectionChangeListener(xPreventDelete);
 105     }
 106     osl_atomic_decrement(&m_refCount);
 107 }
 108
 109 }
 110
 111 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */