summaryrefslogtreecommitdiffstats
path: root/basctl/source/basicide/doceventnotifier.cxx
blob: 83d2ea04dff389479dfe0627874e7d1e13439305 (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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
 */

#include <doceventnotifier.hxx>
#include <scriptdocument.hxx>

#include <com/sun/star/frame/theGlobalEventBroadcaster.hpp>

#include <vcl/svapp.hxx>

#include <tools/diagnose_ex.h>

#include <comphelper/processfactory.hxx>

#include <cppuhelper/compbase.hxx>
#include <cppuhelper/basemutex.hxx>

namespace basctl
{

    using ::com::sun::star::document::XDocumentEventBroadcaster;
    using ::com::sun::star::document::XDocumentEventListener;
    using ::com::sun::star::document::DocumentEvent;
    using ::com::sun::star::uno::XComponentContext;
    using ::com::sun::star::uno::Reference;
    using ::com::sun::star::uno::UNO_QUERY_THROW;
    using ::com::sun::star::uno::Exception;
    using ::com::sun::star::frame::XModel;
    using ::com::sun::star::frame::theGlobalEventBroadcaster;
    using ::com::sun::star::uno::UNO_QUERY;

    // DocumentEventNotifier::Impl

    typedef ::cppu::WeakComponentImplHelper<   XDocumentEventListener
                                           >   DocumentEventNotifier_Impl_Base;

    namespace {

    enum ListenerAction
    {
        RegisterListener,
        RemoveListener
    };

    }

    /** impl class for DocumentEventNotifier
    */
    class DocumentEventNotifier::Impl   :public ::cppu::BaseMutex
                                        ,public DocumentEventNotifier_Impl_Base
    {
    public:
        // noncopyable
        Impl(const Impl&) = delete;
        Impl& operator=(const Impl&) = delete;

        Impl (DocumentEventListener&, Reference<XModel> const& rxDocument);
        virtual ~Impl () override;

        // XDocumentEventListener
        virtual void SAL_CALL documentEventOccured( const DocumentEvent& Event ) override;

        // XEventListener
        virtual void SAL_CALL disposing( const css::lang::EventObject& Event ) override;

        // ComponentHelper
        virtual void SAL_CALL disposing() override;

    private:
        /// determines whether the instance is already disposed
        bool    impl_isDisposed_nothrow() const { return m_pListener == nullptr; }

        /// disposes the instance
        void    impl_dispose_nothrow();

        /// registers or revokes the instance as listener at the global event broadcaster
        void    impl_listenerAction_nothrow( ListenerAction _eAction );

    private:
        DocumentEventListener*  m_pListener;
        Reference< XModel >     m_xModel;
    };

    DocumentEventNotifier::Impl::Impl (DocumentEventListener& rListener, Reference<XModel> const& rxDocument) :
        DocumentEventNotifier_Impl_Base(m_aMutex),
        m_pListener(&rListener),
        m_xModel(rxDocument)
    {
        osl_atomic_increment( &m_refCount );
        impl_listenerAction_nothrow( RegisterListener );
        osl_atomic_decrement( &m_refCount );
    }

    DocumentEventNotifier::Impl::~Impl ()
    {
        if ( !impl_isDisposed_nothrow() )
        {
            acquire();
            dispose();
        }
    }

    void SAL_CALL DocumentEventNotifier::Impl::documentEventOccured( const DocumentEvent& _rEvent )
    {
        ::osl::ClearableMutexGuard aGuard( m_aMutex );

        OSL_PRECOND( !impl_isDisposed_nothrow(), "DocumentEventNotifier::Impl::notifyEvent: disposed, but still getting events?" );
        if ( impl_isDisposed_nothrow() )
            return;

        Reference< XModel > xDocument( _rEvent.Source, UNO_QUERY );
        OSL_ENSURE( xDocument.is(), "DocumentEventNotifier::Impl::notifyEvent: illegal source document!" );
        if ( !xDocument.is() )
            return;

        struct EventEntry
        {
            const char* pEventName;
            void (DocumentEventListener::*listenerMethod)( const ScriptDocument& _rDocument );
        };
        static EventEntry const aEvents[] = {
            { "OnNew",          &DocumentEventListener::onDocumentCreated },
            { "OnLoad",         &DocumentEventListener::onDocumentOpened },
            { "OnSave",         &DocumentEventListener::onDocumentSave },
            { "OnSaveDone",     &DocumentEventListener::onDocumentSaveDone },
            { "OnSaveAs",       &DocumentEventListener::onDocumentSaveAs },
            { "OnSaveAsDone",   &DocumentEventListener::onDocumentSaveAsDone },
            { "OnUnload",       &DocumentEventListener::onDocumentClosed },
            { "OnTitleChanged", &DocumentEventListener::onDocumentTitleChanged },
            { "OnModeChanged",  &DocumentEventListener::onDocumentModeChanged }
        };

        for (EventEntry const & aEvent : aEvents)
        {
            if ( !_rEvent.EventName.equalsAscii( aEvent.pEventName ) )
                continue;

            ScriptDocument aDocument( xDocument );
            {
                // the listener implementations usually require the SolarMutex, so lock it here.
                // But ensure the proper order of locking the solar and the own mutex
                aGuard.clear();
                SolarMutexGuard aSolarGuard;
                ::osl::MutexGuard aGuard2( m_aMutex );

                if ( impl_isDisposed_nothrow() )
                    // somebody took the chance to dispose us -> bail out
                    return;

                (m_pListener->*aEvent.listenerMethod)( aDocument );
            }
            break;
        }
    }

    void SAL_CALL DocumentEventNotifier::Impl::disposing( const css::lang::EventObject& /*Event*/ )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( !impl_isDisposed_nothrow() )
            impl_dispose_nothrow();
    }

    void SAL_CALL DocumentEventNotifier::Impl::disposing()
    {
        impl_listenerAction_nothrow( RemoveListener );
        impl_dispose_nothrow();
    }

    void DocumentEventNotifier::Impl::impl_dispose_nothrow()
    {
        m_pListener = nullptr;
        m_xModel.clear();
    }

    void DocumentEventNotifier::Impl::impl_listenerAction_nothrow( ListenerAction _eAction )
    {
        try
        {
            Reference< XDocumentEventBroadcaster > xBroadcaster;
            if ( m_xModel.is() )
                xBroadcaster.set( m_xModel, UNO_QUERY_THROW );
            else
            {
                Reference< css::uno::XComponentContext > aContext(
                    comphelper::getProcessComponentContext() );
                xBroadcaster = theGlobalEventBroadcaster::get(aContext);
            }

            void ( SAL_CALL XDocumentEventBroadcaster::*listenerAction )( const Reference< XDocumentEventListener >& ) =
                ( _eAction == RegisterListener ) ? &XDocumentEventBroadcaster::addDocumentEventListener : &XDocumentEventBroadcaster::removeDocumentEventListener;
            (xBroadcaster.get()->*listenerAction)( this );
        }
        catch( const Exception& )
        {
            DBG_UNHANDLED_EXCEPTION("basctl.basicide");
        }
    }

    // DocumentEventNotifier

    DocumentEventNotifier::DocumentEventNotifier (DocumentEventListener& rListener, Reference<XModel> const& rxDocument) :
        m_pImpl(new Impl(rListener, rxDocument))
    { }

    DocumentEventNotifier::DocumentEventNotifier (DocumentEventListener& rListener) :
        m_pImpl(new Impl(rListener, Reference<XModel>()))
    { }

    DocumentEventNotifier::~DocumentEventNotifier()
    {
    }

    void DocumentEventNotifier::dispose()
    {
        m_pImpl->dispose();
    }

    // DocumentEventListener

    DocumentEventListener::~DocumentEventListener()
    {
    }

} // namespace basctl

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