summaryrefslogtreecommitdiff
path: root/comphelper/inc/comphelper/scoped_disposing_ptr.hxx
blob: 5e63f1db6cfa48c58dd79501d695e146482eac20 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * Version: MPL 1.1 / GPLv3+ / LGPLv3+
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is
 *        Caolán McNamara <caolanm@redhat.com> (Red Hat, Inc.)
 * Portions created by the Initial Developer are Copyright (C) 2011 the
 * Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Caolán McNamara <caolanm@redhat.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 3 or later (the "GPLv3+"), or
 * the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
 * in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
 * instead of those above.
 */
#ifndef _SCOPED_DISPOSING_PTR
#define _SCOPED_DISPOSING_PTR

#include <cppuhelper/implbase1.hxx>
#include <boost/utility.hpp>
#include <boost/scoped_ptr.hpp>

#include <com/sun/star/lang/XComponent.hpp>

#include <stdio.h>

namespace comphelper
{
//Similar to boost::scoped_ptr, except additionally releases the ptr on rComponent::disposing
template<class T> class scoped_disposing_ptr : private boost::noncopyable
{
private:
    boost::scoped_ptr<T> m_aItem;
    ::com::sun::star::uno::Reference< ::com::sun::star::lang::XEventListener> m_xDisposingListener;
public:
    scoped_disposing_ptr( const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > &rComponent, T * p = 0 )
        : m_aItem(p)
    {
        m_xDisposingListener = new DisposingListener(rComponent, m_aItem);
    }

    void reset(T * p = 0)
    {
        m_aItem.reset(p);
    }

    T & operator*() const
    {
        return *m_aItem;
    }

    T * get() const
    {
        return m_aItem.get();
    }

    T * operator->() const
    {
        return m_aItem.get();
    }

    operator bool () const
    {
        return m_aItem;
    }

    virtual ~scoped_disposing_ptr()
    {
        reset();
    }
private:
    class DisposingListener : public ::cppu::WeakImplHelper1< ::com::sun::star::lang::XEventListener >
    {
    private:
        ::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > m_xComponent;
        boost::scoped_ptr<T>& m_rItem;
    public:
        DisposingListener(const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > &rComponent,
            boost::scoped_ptr<T>& rItem) : m_xComponent(rComponent), m_rItem(rItem)
        {
            if (m_xComponent.is())
                m_xComponent->addEventListener( this );
        }

        ~DisposingListener()
        {
            if ( m_xComponent.is() )
                m_xComponent->removeEventListener( this );
        }

    private:
        // XEventListener
        virtual void SAL_CALL disposing( ::com::sun::star::lang::EventObject const & rEvt )
            throw (::com::sun::star::uno::RuntimeException)
        {
            bool shutDown = (rEvt.Source == m_xComponent);

            if ( shutDown && m_xComponent.is() )
            {
                m_xComponent->removeEventListener( this );
                m_xComponent.clear();
            }

            if ( shutDown )
               m_rItem.reset();
        }
    };
};

}

#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */