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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 "framework/documentundoguard.hxx"
22 :
23 : #include <com/sun/star/document/XUndoManagerSupplier.hpp>
24 :
25 : #include <cppuhelper/implbase1.hxx>
26 : #include <rtl/ref.hxx>
27 : #include <tools/diagnose_ex.h>
28 :
29 : //......................................................................................................................
30 : namespace framework
31 : {
32 : //......................................................................................................................
33 :
34 : /** === begin UNO using === **/
35 : using ::com::sun::star::uno::Reference;
36 : using ::com::sun::star::uno::XInterface;
37 : using ::com::sun::star::uno::UNO_QUERY;
38 : using ::com::sun::star::uno::UNO_QUERY_THROW;
39 : using ::com::sun::star::uno::Exception;
40 : using ::com::sun::star::uno::RuntimeException;
41 : using ::com::sun::star::uno::Any;
42 : using ::com::sun::star::uno::makeAny;
43 : using ::com::sun::star::uno::Sequence;
44 : using ::com::sun::star::uno::Type;
45 : using ::com::sun::star::document::XUndoManagerSupplier;
46 : using ::com::sun::star::document::XUndoManager;
47 : using ::com::sun::star::document::XUndoManagerListener;
48 : using ::com::sun::star::document::UndoManagerEvent;
49 : using ::com::sun::star::lang::EventObject;
50 : /** === end UNO using === **/
51 :
52 : //==================================================================================================================
53 : //= UndoManagerContextListener
54 : //==================================================================================================================
55 : typedef ::cppu::WeakImplHelper1 < XUndoManagerListener
56 : > UndoManagerContextListener_Base;
57 2 : class UndoManagerContextListener : public UndoManagerContextListener_Base
58 : {
59 : public:
60 1 : UndoManagerContextListener( const Reference< XUndoManager >& i_undoManager )
61 : :m_xUndoManager( i_undoManager, UNO_QUERY_THROW )
62 : ,m_nRelativeContextDepth( 0 )
63 1 : ,m_documentDisposed( false )
64 : {
65 1 : osl_atomic_increment( &m_refCount );
66 : {
67 1 : m_xUndoManager->addUndoManagerListener( this );
68 : }
69 1 : osl_atomic_decrement( &m_refCount );
70 1 : }
71 :
72 : UndoManagerContextListener()
73 : {
74 : }
75 :
76 1 : void finish()
77 : {
78 : OSL_ENSURE( m_nRelativeContextDepth >= 0, "UndoManagerContextListener: more contexts left than entered?" );
79 :
80 1 : if ( m_documentDisposed )
81 1 : return;
82 :
83 : // work with a copy of m_nRelativeContextDepth, to be independent from possible bugs in the
84 : // listener notifications (where it would be decremented with every leaveUndoContext)
85 1 : sal_Int32 nDepth = m_nRelativeContextDepth;
86 2 : while ( nDepth-- > 0 )
87 : {
88 0 : m_xUndoManager->leaveUndoContext();
89 : }
90 1 : m_xUndoManager->removeUndoManagerListener( this );
91 : }
92 :
93 : // XUndoManagerListener
94 : virtual void SAL_CALL undoActionAdded( const UndoManagerEvent& i_event ) throw (RuntimeException);
95 : virtual void SAL_CALL actionUndone( const UndoManagerEvent& i_event ) throw (RuntimeException);
96 : virtual void SAL_CALL actionRedone( const UndoManagerEvent& i_event ) throw (RuntimeException);
97 : virtual void SAL_CALL allActionsCleared( const EventObject& i_event ) throw (RuntimeException);
98 : virtual void SAL_CALL redoActionsCleared( const EventObject& i_event ) throw (RuntimeException);
99 : virtual void SAL_CALL resetAll( const EventObject& i_event ) throw (RuntimeException);
100 : virtual void SAL_CALL enteredContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
101 : virtual void SAL_CALL enteredHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
102 : virtual void SAL_CALL leftContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
103 : virtual void SAL_CALL leftHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
104 : virtual void SAL_CALL cancelledContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
105 :
106 : // XEventListener
107 : virtual void SAL_CALL disposing( const EventObject& i_event ) throw (RuntimeException);
108 :
109 : private:
110 : Reference< XUndoManager > const m_xUndoManager;
111 : oslInterlockedCount m_nRelativeContextDepth;
112 : bool m_documentDisposed;
113 : };
114 :
115 : //------------------------------------------------------------------------------------------------------------------
116 0 : void SAL_CALL UndoManagerContextListener::undoActionAdded( const UndoManagerEvent& i_event ) throw (RuntimeException)
117 : {
118 : (void)i_event;
119 : // not interested in
120 0 : }
121 :
122 : //------------------------------------------------------------------------------------------------------------------
123 0 : void SAL_CALL UndoManagerContextListener::actionUndone( const UndoManagerEvent& i_event ) throw (RuntimeException)
124 : {
125 : (void)i_event;
126 : // not interested in
127 0 : }
128 :
129 : //------------------------------------------------------------------------------------------------------------------
130 0 : void SAL_CALL UndoManagerContextListener::actionRedone( const UndoManagerEvent& i_event ) throw (RuntimeException)
131 : {
132 : (void)i_event;
133 : // not interested in
134 0 : }
135 :
136 : //------------------------------------------------------------------------------------------------------------------
137 0 : void SAL_CALL UndoManagerContextListener::allActionsCleared( const EventObject& i_event ) throw (RuntimeException)
138 : {
139 : (void)i_event;
140 : // not interested in
141 0 : }
142 :
143 : //------------------------------------------------------------------------------------------------------------------
144 0 : void SAL_CALL UndoManagerContextListener::redoActionsCleared( const EventObject& i_event ) throw (RuntimeException)
145 : {
146 : (void)i_event;
147 : // not interested in
148 0 : }
149 :
150 : //------------------------------------------------------------------------------------------------------------------
151 0 : void SAL_CALL UndoManagerContextListener::resetAll( const EventObject& i_event ) throw (RuntimeException)
152 : {
153 : (void)i_event;
154 0 : m_nRelativeContextDepth = 0;
155 0 : }
156 :
157 : //------------------------------------------------------------------------------------------------------------------
158 0 : void SAL_CALL UndoManagerContextListener::enteredContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
159 : {
160 : (void)i_event;
161 0 : osl_atomic_increment( &m_nRelativeContextDepth );
162 0 : }
163 :
164 : //------------------------------------------------------------------------------------------------------------------
165 0 : void SAL_CALL UndoManagerContextListener::enteredHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
166 : {
167 : (void)i_event;
168 0 : osl_atomic_increment( &m_nRelativeContextDepth );
169 0 : }
170 :
171 : //------------------------------------------------------------------------------------------------------------------
172 0 : void SAL_CALL UndoManagerContextListener::leftContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
173 : {
174 : (void)i_event;
175 0 : osl_atomic_decrement( &m_nRelativeContextDepth );
176 0 : }
177 :
178 : //------------------------------------------------------------------------------------------------------------------
179 0 : void SAL_CALL UndoManagerContextListener::leftHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
180 : {
181 : (void)i_event;
182 0 : osl_atomic_decrement( &m_nRelativeContextDepth );
183 0 : }
184 :
185 : //------------------------------------------------------------------------------------------------------------------
186 0 : void SAL_CALL UndoManagerContextListener::cancelledContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
187 : {
188 : (void)i_event;
189 0 : osl_atomic_decrement( &m_nRelativeContextDepth );
190 0 : }
191 :
192 : //------------------------------------------------------------------------------------------------------------------
193 0 : void SAL_CALL UndoManagerContextListener::disposing( const EventObject& i_event ) throw (RuntimeException)
194 : {
195 : (void)i_event;
196 0 : m_documentDisposed = true;
197 0 : }
198 :
199 : //==================================================================================================================
200 : //= DocumentUndoGuard_Data
201 : //==================================================================================================================
202 2 : struct DocumentUndoGuard_Data
203 : {
204 : Reference< XUndoManager > xUndoManager;
205 : ::rtl::Reference< UndoManagerContextListener > pContextListener;
206 : };
207 :
208 : namespace
209 : {
210 : //--------------------------------------------------------------------------------------------------------------
211 1 : void lcl_init( DocumentUndoGuard_Data& i_data, const Reference< XInterface >& i_undoSupplierComponent )
212 : {
213 : try
214 : {
215 1 : Reference< XUndoManagerSupplier > xUndoSupplier( i_undoSupplierComponent, UNO_QUERY );
216 1 : if ( xUndoSupplier.is() )
217 1 : i_data.xUndoManager.set( xUndoSupplier->getUndoManager(), UNO_QUERY_THROW );
218 :
219 1 : if ( i_data.xUndoManager.is() )
220 1 : i_data.pContextListener.set( new UndoManagerContextListener( i_data.xUndoManager ) );
221 : }
222 0 : catch( const Exception& )
223 : {
224 : DBG_UNHANDLED_EXCEPTION();
225 : }
226 1 : }
227 :
228 : //--------------------------------------------------------------------------------------------------------------
229 1 : void lcl_restore( DocumentUndoGuard_Data& i_data )
230 : {
231 : try
232 : {
233 1 : if ( i_data.pContextListener.is() )
234 1 : i_data.pContextListener->finish();
235 1 : i_data.pContextListener.clear();
236 : }
237 0 : catch( const Exception& )
238 : {
239 : DBG_UNHANDLED_EXCEPTION();
240 : }
241 1 : }
242 : }
243 :
244 : //==================================================================================================================
245 : //= DocumentUndoGuard
246 : //==================================================================================================================
247 : //------------------------------------------------------------------------------------------------------------------
248 1 : DocumentUndoGuard::DocumentUndoGuard( const Reference< XInterface >& i_undoSupplierComponent )
249 1 : :m_pData( new DocumentUndoGuard_Data )
250 : {
251 1 : lcl_init( *m_pData, i_undoSupplierComponent );
252 1 : }
253 :
254 2 : DocumentUndoGuard::~DocumentUndoGuard()
255 : {
256 1 : lcl_restore( *m_pData );
257 1 : }
258 :
259 : //......................................................................................................................
260 : } // namespace framework
261 : //......................................................................................................................
262 :
263 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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