unotools/source/misc/closeveto.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 #include <unotools/closeveto.hxx>
  21
  22 #include <com/sun/star/util/CloseVetoException.hpp>
  23 #include <com/sun/star/util/XCloseable.hpp>
  24
  25 #include <cppuhelper/implbase.hxx>
  26 #include <rtl/ref.hxx>
  27 #include <comphelper/diagnose_ex.hxx>
  28
  29 namespace utl
  30 {
  31
  32     using ::com::sun::star::uno::Reference;
  33     using ::com::sun::star::uno::XInterface;
  34     using ::com::sun::star::uno::UNO_QUERY;
  35     using ::com::sun::star::uno::Exception;
  36     using ::com::sun::star::util::XCloseable;
  37     using ::com::sun::star::util::XCloseListener;
  38     using ::com::sun::star::util::CloseVetoException;
  39     using ::com::sun::star::lang::EventObject;
  40
  41     //= CloseListener_Impl
  42
  43     typedef ::cppu::WeakImplHelper <   XCloseListener
  44                                     >   CloseListener_Base;
  45
  46     namespace {
  47
  48     class CloseListener_Impl : public CloseListener_Base
  49     {
  50     public:
  51         explicit CloseListener_Impl(bool const bHasOwnership)
  52             : m_bHasOwnership(bHasOwnership)
  53         {
  54         }
  55
  56         // XCloseListener
  57         virtual void SAL_CALL queryClosing( const EventObject& Source, sal_Bool GetsOwnership ) override;
  58         virtual void SAL_CALL notifyClosing( const EventObject& Source ) override;
  59
  60         // XEventListener
  61         virtual void SAL_CALL disposing( const EventObject& Source) override;
  62
  63         bool hasOwnership() const { return m_bHasOwnership; }
  64
  65     protected:
  66         virtual ~CloseListener_Impl() override
  67         {
  68         }
  69
  70     private:
  71         bool    m_bHasOwnership;
  72     };
  73
  74     }
  75
  76     void SAL_CALL CloseListener_Impl::queryClosing( const EventObject&, sal_Bool i_deliverOwnership )
  77     {
  78         if ( !m_bHasOwnership )
  79             m_bHasOwnership = i_deliverOwnership;
  80
  81         throw CloseVetoException();
  82     }
  83
  84     void SAL_CALL CloseListener_Impl::notifyClosing( const EventObject& ) {}
  85
  86     void SAL_CALL CloseListener_Impl::disposing( const EventObject& ) {}
  87
  88     //= CloseVeto_Data
  89
  90     struct CloseVeto_Data
  91     {
  92         Reference< XCloseable >                 xCloseable;
  93         ::rtl::Reference< CloseListener_Impl >  pListener;
  94     };
  95
  96     //= operations
  97
  98     namespace
  99     {
 100
 101         void lcl_init( CloseVeto_Data& i_data, const Reference< XInterface >& i_closeable,
 102                 bool const hasOwnership)
 103         {
 104             i_data.xCloseable.set( i_closeable, UNO_QUERY );
 105             ENSURE_OR_RETURN_VOID( i_data.xCloseable.is(), "CloseVeto: the component is not closeable!" );
 106
 107             i_data.pListener = new CloseListener_Impl(hasOwnership);
 108             i_data.xCloseable->addCloseListener( i_data.pListener );
 109         }
 110
 111         void lcl_deinit( CloseVeto_Data const & i_data )
 112         {
 113             if ( !i_data.xCloseable.is() )
 114                 return;
 115
 116             i_data.xCloseable->removeCloseListener( i_data.pListener );
 117             if ( i_data.pListener->hasOwnership() )
 118             {
 119                 try
 120                 {
 121                     i_data.xCloseable->close( true );
 122                 }
 123                 catch( const CloseVetoException& ) { }
 124                 catch( const Exception& )
 125                 {
 126                     DBG_UNHANDLED_EXCEPTION("unotools");
 127                 }
 128             }
 129         }
 130     }
 131
 132     //= CloseVeto
 133     CloseVeto::CloseVeto(const Reference< XInterface >& i_closeable,
 134             bool const hasOwnership)
 135         : m_xData(new CloseVeto_Data)
 136     {
 137         lcl_init(*m_xData, i_closeable, hasOwnership);
 138     }
 139
 140     CloseVeto::~CloseVeto()
 141     {
 142         lcl_deinit(*m_xData);
 143     }
 144
 145 } // namespace utl
 146
 147 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */