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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 : #include <com/sun/star/container/XNameAccess.hpp>
21 : #include <com/sun/star/drawing/XShape.hpp>
22 : #include <com/sun/star/frame/XModel.hpp>
23 : #include <com/sun/star/task/XInteractionHandler.hpp>
24 : #include <com/sun/star/task/XStatusIndicator.hpp>
25 : #include <com/sun/star/uno/XComponentContext.hpp>
26 : #include <comphelper/docpasswordhelper.hxx>
27 : #include <cppuhelper/supportsservice.hxx>
28 : #include <unotools/mediadescriptor.hxx>
29 : #include <osl/mutex.hxx>
30 : #include <rtl/instance.hxx>
31 : #include <rtl/uri.hxx>
32 : #include <set>
33 :
34 : #include "oox/core/filterbase.hxx"
35 : #include "oox/helper/binaryinputstream.hxx"
36 : #include "oox/helper/binaryoutputstream.hxx"
37 : #include "oox/helper/graphichelper.hxx"
38 : #include "oox/helper/modelobjecthelper.hxx"
39 : #include "oox/ole/oleobjecthelper.hxx"
40 : #include "oox/ole/vbaproject.hxx"
41 :
42 : namespace oox {
43 : namespace core {
44 :
45 : using namespace ::com::sun::star::beans;
46 : using namespace ::com::sun::star::frame;
47 : using namespace ::com::sun::star::graphic;
48 : using namespace ::com::sun::star::drawing;
49 : using namespace ::com::sun::star::io;
50 : using namespace ::com::sun::star::lang;
51 : using namespace ::com::sun::star::task;
52 : using namespace ::com::sun::star::uno;
53 :
54 : using ::com::sun::star::container::XNameAccess;
55 : using utl::MediaDescriptor;
56 : using ::comphelper::SequenceAsHashMap;
57 : using ::oox::ole::OleObjectHelper;
58 : using ::oox::ole::VbaProject;
59 :
60 : namespace {
61 :
62 0 : struct UrlPool
63 : {
64 : ::osl::Mutex maMutex;
65 : ::std::set< OUString > maUrls;
66 : };
67 :
68 : struct StaticUrlPool : public ::rtl::Static< UrlPool, StaticUrlPool > {};
69 :
70 : /** This guard prevents recursive loading/saving of the same document. */
71 : class DocumentOpenedGuard
72 : {
73 : public:
74 : explicit DocumentOpenedGuard( const OUString& rUrl );
75 : ~DocumentOpenedGuard();
76 :
77 0 : inline bool isValid() const { return mbValid; }
78 :
79 : private:
80 : DocumentOpenedGuard( const DocumentOpenedGuard& );
81 : DocumentOpenedGuard& operator=( const DocumentOpenedGuard& );
82 :
83 : OUString maUrl;
84 : bool mbValid;
85 : };
86 :
87 0 : DocumentOpenedGuard::DocumentOpenedGuard( const OUString& rUrl )
88 : {
89 0 : UrlPool& rUrlPool = StaticUrlPool::get();
90 0 : ::osl::MutexGuard aGuard( rUrlPool.maMutex );
91 0 : mbValid = rUrl.isEmpty() || (rUrlPool.maUrls.count( rUrl ) == 0);
92 0 : if( mbValid && !rUrl.isEmpty() )
93 : {
94 0 : rUrlPool.maUrls.insert( rUrl );
95 0 : maUrl = rUrl;
96 0 : }
97 0 : }
98 :
99 0 : DocumentOpenedGuard::~DocumentOpenedGuard()
100 : {
101 0 : UrlPool& rUrlPool = StaticUrlPool::get();
102 0 : ::osl::MutexGuard aGuard( rUrlPool.maMutex );
103 0 : if( !maUrl.isEmpty() )
104 0 : rUrlPool.maUrls.erase( maUrl );
105 0 : }
106 :
107 : } // namespace
108 :
109 : /** Specifies whether this filter is an import or export filter. */
110 : enum FilterDirection
111 : {
112 : FILTERDIRECTION_UNKNOWN,
113 : FILTERDIRECTION_IMPORT,
114 : FILTERDIRECTION_EXPORT
115 : };
116 :
117 0 : struct FilterBaseImpl
118 : {
119 : typedef ::boost::shared_ptr< GraphicHelper > GraphicHelperRef;
120 : typedef ::boost::shared_ptr< ModelObjectHelper > ModelObjHelperRef;
121 : typedef ::boost::shared_ptr< OleObjectHelper > OleObjHelperRef;
122 : typedef ::boost::shared_ptr< VbaProject > VbaProjectRef;
123 :
124 : FilterDirection meDirection;
125 : SequenceAsHashMap maArguments;
126 : SequenceAsHashMap maFilterData;
127 : MediaDescriptor maMediaDesc;
128 : OUString maFileUrl;
129 : StorageRef mxStorage;
130 : OoxmlVersion meVersion;
131 :
132 : GraphicHelperRef mxGraphicHelper; /// Graphic and graphic object handling.
133 : ModelObjHelperRef mxModelObjHelper; /// Tables to create new named drawing objects.
134 : OleObjHelperRef mxOleObjHelper; /// OLE object handling.
135 : VbaProjectRef mxVbaProject; /// VBA project manager.
136 :
137 : Reference< XComponentContext > mxComponentContext;
138 : Reference< XMultiComponentFactory > mxComponentFactory;
139 : Reference< XModel > mxModel;
140 : Reference< XMultiServiceFactory > mxModelFactory;
141 : Reference< XFrame > mxTargetFrame;
142 : Reference< XInputStream > mxInStream;
143 : Reference< XStream > mxOutStream;
144 : Reference< XStatusIndicator > mxStatusIndicator;
145 : Reference< XInteractionHandler > mxInteractionHandler;
146 : Reference< XShape > mxParentShape;
147 :
148 : explicit FilterBaseImpl( const Reference< XComponentContext >& rxContext ) throw( RuntimeException );
149 :
150 : void setDocumentModel( const Reference< XComponent >& rxComponent ) throw( IllegalArgumentException );
151 :
152 : void initializeFilter();
153 : };
154 :
155 0 : FilterBaseImpl::FilterBaseImpl( const Reference< XComponentContext >& rxContext ) throw( RuntimeException ) :
156 : meDirection( FILTERDIRECTION_UNKNOWN ),
157 : meVersion( ECMA_DIALECT ),
158 : mxComponentContext( rxContext, UNO_SET_THROW ),
159 0 : mxComponentFactory( rxContext->getServiceManager(), UNO_SET_THROW )
160 : {
161 0 : }
162 :
163 0 : void FilterBaseImpl::setDocumentModel( const Reference< XComponent >& rxComponent ) throw( IllegalArgumentException )
164 : {
165 : try
166 : {
167 0 : mxModel.set( rxComponent, UNO_QUERY_THROW );
168 0 : mxModelFactory.set( rxComponent, UNO_QUERY_THROW );
169 : }
170 0 : catch( Exception& )
171 : {
172 0 : throw IllegalArgumentException();
173 : }
174 0 : }
175 :
176 0 : void FilterBaseImpl::initializeFilter()
177 : {
178 : try
179 : {
180 : // lock the model controllers
181 0 : mxModel->lockControllers();
182 : }
183 0 : catch( Exception& )
184 : {
185 : }
186 0 : }
187 :
188 0 : FilterBase::FilterBase( const Reference< XComponentContext >& rxContext ) throw( RuntimeException ) :
189 0 : mxImpl( new FilterBaseImpl( rxContext ) )
190 : {
191 0 : }
192 :
193 0 : FilterBase::~FilterBase()
194 : {
195 0 : }
196 :
197 0 : bool FilterBase::isImportFilter() const
198 : {
199 0 : return mxImpl->meDirection == FILTERDIRECTION_IMPORT;
200 : }
201 :
202 0 : bool FilterBase::isExportFilter() const
203 : {
204 0 : return mxImpl->meDirection == FILTERDIRECTION_EXPORT;
205 : }
206 :
207 0 : OoxmlVersion FilterBase::getVersion() const
208 : {
209 0 : return mxImpl->meVersion;
210 : }
211 :
212 0 : const Reference< XComponentContext >& FilterBase::getComponentContext() const
213 : {
214 0 : return mxImpl->mxComponentContext;
215 : }
216 :
217 0 : const Reference< XModel >& FilterBase::getModel() const
218 : {
219 0 : return mxImpl->mxModel;
220 : }
221 :
222 0 : const Reference< XMultiServiceFactory >& FilterBase::getModelFactory() const
223 : {
224 0 : return mxImpl->mxModelFactory;
225 : }
226 :
227 0 : const Reference< XFrame >& FilterBase::getTargetFrame() const
228 : {
229 0 : return mxImpl->mxTargetFrame;
230 : }
231 :
232 0 : const Reference< XShape >& FilterBase::getParentShape() const
233 : {
234 0 : return mxImpl->mxParentShape;
235 : }
236 :
237 0 : const Reference< XStatusIndicator >& FilterBase::getStatusIndicator() const
238 : {
239 0 : return mxImpl->mxStatusIndicator;
240 : }
241 :
242 0 : MediaDescriptor& FilterBase::getMediaDescriptor() const
243 : {
244 0 : return mxImpl->maMediaDesc;
245 : }
246 :
247 0 : SequenceAsHashMap& FilterBase::getFilterData() const
248 : {
249 0 : return mxImpl->maFilterData;
250 : }
251 :
252 0 : const OUString& FilterBase::getFileUrl() const
253 : {
254 0 : return mxImpl->maFileUrl;
255 : }
256 :
257 : namespace {
258 :
259 0 : inline bool lclIsDosDrive( const OUString& rUrl, sal_Int32 nPos = 0 )
260 : {
261 : return
262 0 : (rUrl.getLength() >= nPos + 3) &&
263 0 : ((('A' <= rUrl[ nPos ]) && (rUrl[ nPos ] <= 'Z')) || (('a' <= rUrl[ nPos ]) && (rUrl[ nPos ] <= 'z'))) &&
264 0 : (rUrl[ nPos + 1 ] == ':') &&
265 0 : (rUrl[ nPos + 2 ] == '/');
266 : }
267 :
268 : } // namespace
269 :
270 0 : OUString FilterBase::getAbsoluteUrl( const OUString& rUrl ) const
271 : {
272 : // handle some special cases before calling ::rtl::Uri::convertRelToAbs()
273 :
274 0 : const OUString aFileSchema = "file:";
275 0 : const OUString aFilePrefix = "file:///";
276 0 : const sal_Int32 nFilePrefixLen = aFilePrefix.getLength();
277 0 : const OUString aUncPrefix = "//";
278 :
279 : /* (1) convert all backslashes to slashes, and check that passed URL is
280 : not empty. */
281 0 : OUString aUrl = rUrl.replace( '\\', '/' );
282 0 : if( aUrl.isEmpty() )
283 0 : return aUrl;
284 :
285 : /* (2) add 'file:///' to absolute Windows paths, e.g. convert
286 : 'C:/path/file' to 'file:///c:/path/file'. */
287 0 : if( lclIsDosDrive( aUrl ) )
288 0 : return aFilePrefix + aUrl;
289 :
290 : /* (3) add 'file:' to UNC paths, e.g. convert '//server/path/file' to
291 : 'file://server/path/file'. */
292 0 : if( aUrl.match( aUncPrefix ) )
293 0 : return aFileSchema + aUrl;
294 :
295 : /* (4) remove additional slashes from UNC paths, e.g. convert
296 : 'file://///server/path/file' to 'file://server/path/file'. */
297 0 : if( (aUrl.getLength() >= nFilePrefixLen + 2) &&
298 0 : aUrl.match( aFilePrefix ) &&
299 0 : aUrl.match( aUncPrefix, nFilePrefixLen ) )
300 : {
301 0 : return aFileSchema + aUrl.copy( nFilePrefixLen );
302 : }
303 :
304 : /* (5) handle URLs relative to current drive, e.g. the URL '/path1/file1'
305 : relative to the base URL 'file:///C:/path2/file2' does not result in
306 : the expected 'file:///C:/path1/file1', but in 'file:///path1/file1'. */
307 0 : if( aUrl.startsWith("/") &&
308 0 : mxImpl->maFileUrl.match( aFilePrefix ) &&
309 0 : lclIsDosDrive( mxImpl->maFileUrl, nFilePrefixLen ) )
310 : {
311 0 : return mxImpl->maFileUrl.copy( 0, nFilePrefixLen + 3 ) + aUrl.copy( 1 );
312 : }
313 :
314 : try
315 : {
316 0 : return ::rtl::Uri::convertRelToAbs( mxImpl->maFileUrl, aUrl );
317 : }
318 0 : catch( ::rtl::MalformedUriException& )
319 : {
320 : }
321 0 : return aUrl;
322 : }
323 :
324 0 : StorageRef FilterBase::getStorage() const
325 : {
326 0 : return mxImpl->mxStorage;
327 : }
328 :
329 0 : Reference< XInputStream > FilterBase::openInputStream( const OUString& rStreamName ) const
330 : {
331 0 : return mxImpl->mxStorage->openInputStream( rStreamName );
332 : }
333 :
334 0 : Reference< XOutputStream > FilterBase::openOutputStream( const OUString& rStreamName ) const
335 : {
336 0 : return mxImpl->mxStorage->openOutputStream( rStreamName );
337 : }
338 :
339 0 : void FilterBase::commitStorage() const
340 : {
341 0 : mxImpl->mxStorage->commit();
342 0 : }
343 :
344 : // helpers
345 :
346 0 : GraphicHelper& FilterBase::getGraphicHelper() const
347 : {
348 0 : if( !mxImpl->mxGraphicHelper )
349 0 : mxImpl->mxGraphicHelper.reset( implCreateGraphicHelper() );
350 0 : return *mxImpl->mxGraphicHelper;
351 : }
352 :
353 0 : ModelObjectHelper& FilterBase::getModelObjectHelper() const
354 : {
355 0 : if( !mxImpl->mxModelObjHelper )
356 0 : mxImpl->mxModelObjHelper.reset( new ModelObjectHelper( mxImpl->mxModelFactory ) );
357 0 : return *mxImpl->mxModelObjHelper;
358 : }
359 :
360 0 : OleObjectHelper& FilterBase::getOleObjectHelper() const
361 : {
362 0 : if( !mxImpl->mxOleObjHelper )
363 0 : mxImpl->mxOleObjHelper.reset( new OleObjectHelper( mxImpl->mxModelFactory ) );
364 0 : return *mxImpl->mxOleObjHelper;
365 : }
366 :
367 0 : VbaProject& FilterBase::getVbaProject() const
368 : {
369 0 : if( !mxImpl->mxVbaProject )
370 0 : mxImpl->mxVbaProject.reset( implCreateVbaProject() );
371 0 : return *mxImpl->mxVbaProject;
372 : }
373 :
374 0 : bool FilterBase::importBinaryData( StreamDataSequence& orDataSeq, const OUString& rStreamName )
375 : {
376 : OSL_ENSURE( !rStreamName.isEmpty(), "FilterBase::importBinaryData - empty stream name" );
377 0 : if( rStreamName.isEmpty() )
378 0 : return false;
379 :
380 : // try to open the stream (this may fail - do not assert)
381 0 : BinaryXInputStream aInStrm( openInputStream( rStreamName ), true );
382 0 : if( aInStrm.isEof() )
383 0 : return false;
384 :
385 : // copy the entire stream to the passed sequence
386 0 : SequenceOutputStream aOutStrm( orDataSeq );
387 0 : aInStrm.copyToStream( aOutStrm );
388 0 : return true;
389 : }
390 :
391 : // com.sun.star.lang.XServiceInfo interface
392 :
393 0 : OUString SAL_CALL FilterBase::getImplementationName() throw( RuntimeException, std::exception )
394 : {
395 0 : return implGetImplementationName();
396 : }
397 :
398 0 : sal_Bool SAL_CALL FilterBase::supportsService( const OUString& rServiceName ) throw( RuntimeException, std::exception )
399 : {
400 0 : return cppu::supportsService(this, rServiceName);
401 : }
402 :
403 0 : Sequence< OUString > SAL_CALL FilterBase::getSupportedServiceNames() throw( RuntimeException, std::exception )
404 : {
405 0 : Sequence< OUString > aServiceNames( 2 );
406 0 : aServiceNames[ 0 ] = "com.sun.star.document.ImportFilter";
407 0 : aServiceNames[ 1 ] = "com.sun.star.document.ExportFilter";
408 0 : return aServiceNames;
409 : }
410 :
411 : // com.sun.star.lang.XInitialization interface
412 :
413 0 : void SAL_CALL FilterBase::initialize( const Sequence< Any >& rArgs ) throw( Exception, RuntimeException, std::exception )
414 : {
415 0 : if( rArgs.getLength() >= 2 ) try
416 : {
417 0 : mxImpl->maArguments << rArgs[ 1 ];
418 : }
419 0 : catch( Exception& )
420 : {
421 : }
422 0 : }
423 :
424 : // com.sun.star.document.XImporter interface
425 :
426 0 : void SAL_CALL FilterBase::setTargetDocument( const Reference< XComponent >& rxDocument ) throw( IllegalArgumentException, RuntimeException, std::exception )
427 : {
428 0 : mxImpl->setDocumentModel( rxDocument );
429 0 : mxImpl->meDirection = FILTERDIRECTION_IMPORT;
430 0 : }
431 :
432 : // com.sun.star.document.XExporter interface
433 :
434 0 : void SAL_CALL FilterBase::setSourceDocument( const Reference< XComponent >& rxDocument ) throw( IllegalArgumentException, RuntimeException, std::exception )
435 : {
436 0 : mxImpl->setDocumentModel( rxDocument );
437 0 : mxImpl->meDirection = FILTERDIRECTION_EXPORT;
438 0 : }
439 :
440 : // com.sun.star.document.XFilter interface
441 :
442 0 : sal_Bool SAL_CALL FilterBase::filter( const Sequence< PropertyValue >& rMediaDescSeq ) throw( RuntimeException, std::exception )
443 : {
444 0 : if( !mxImpl->mxModel.is() || !mxImpl->mxModelFactory.is() || (mxImpl->meDirection == FILTERDIRECTION_UNKNOWN) )
445 0 : throw RuntimeException();
446 :
447 0 : sal_Bool bRet = sal_False;
448 0 : setMediaDescriptor( rMediaDescSeq );
449 0 : DocumentOpenedGuard aOpenedGuard( mxImpl->maFileUrl );
450 0 : if( aOpenedGuard.isValid() || mxImpl->maFileUrl.isEmpty() )
451 : {
452 0 : mxImpl->initializeFilter();
453 0 : switch( mxImpl->meDirection )
454 : {
455 : case FILTERDIRECTION_UNKNOWN:
456 0 : break;
457 : case FILTERDIRECTION_IMPORT:
458 0 : if( mxImpl->mxInStream.is() )
459 : {
460 0 : mxImpl->mxStorage = implCreateStorage( mxImpl->mxInStream );
461 0 : bRet = mxImpl->mxStorage.get() && importDocument();
462 : }
463 0 : break;
464 : case FILTERDIRECTION_EXPORT:
465 0 : if( mxImpl->mxOutStream.is() )
466 : {
467 0 : mxImpl->mxStorage = implCreateStorage( mxImpl->mxOutStream );
468 0 : bRet = mxImpl->mxStorage.get() && exportDocument() && implFinalizeExport( getMediaDescriptor() );
469 : }
470 0 : break;
471 : }
472 0 : mxImpl->mxModel->unlockControllers();
473 : }
474 0 : return bRet;
475 : }
476 :
477 0 : void SAL_CALL FilterBase::cancel() throw( RuntimeException, std::exception )
478 : {
479 0 : }
480 :
481 : // protected
482 :
483 0 : Reference< XInputStream > FilterBase::implGetInputStream( MediaDescriptor& rMediaDesc ) const
484 : {
485 0 : return rMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_INPUTSTREAM(), Reference< XInputStream >() );
486 : }
487 :
488 0 : Reference< XStream > FilterBase::implGetOutputStream( MediaDescriptor& rMediaDesc ) const
489 : {
490 0 : return rMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_STREAMFOROUTPUT(), Reference< XStream >() );
491 : }
492 :
493 0 : bool FilterBase::implFinalizeExport( MediaDescriptor& /*rMediaDescriptor*/ )
494 : {
495 0 : return true;
496 : }
497 :
498 0 : Reference< XStream > FilterBase::getMainDocumentStream( ) const
499 : {
500 0 : return mxImpl->mxOutStream;
501 : }
502 :
503 : // private
504 :
505 0 : void FilterBase::setMediaDescriptor( const Sequence< PropertyValue >& rMediaDescSeq )
506 : {
507 0 : mxImpl->maMediaDesc << rMediaDescSeq;
508 :
509 0 : switch( mxImpl->meDirection )
510 : {
511 : case FILTERDIRECTION_UNKNOWN:
512 : OSL_FAIL( "FilterBase::setMediaDescriptor - invalid filter direction" );
513 0 : break;
514 : case FILTERDIRECTION_IMPORT:
515 0 : mxImpl->maMediaDesc.addInputStream();
516 0 : mxImpl->mxInStream = implGetInputStream( mxImpl->maMediaDesc );
517 : OSL_ENSURE( mxImpl->mxInStream.is(), "FilterBase::setMediaDescriptor - missing input stream" );
518 0 : break;
519 : case FILTERDIRECTION_EXPORT:
520 0 : mxImpl->mxOutStream = implGetOutputStream( mxImpl->maMediaDesc );
521 : OSL_ENSURE( mxImpl->mxOutStream.is(), "FilterBase::setMediaDescriptor - missing output stream" );
522 0 : break;
523 : }
524 :
525 0 : mxImpl->maFileUrl = mxImpl->maMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_URL(), OUString() );
526 0 : mxImpl->mxTargetFrame = mxImpl->maMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_FRAME(), Reference< XFrame >() );
527 0 : mxImpl->mxStatusIndicator = mxImpl->maMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_STATUSINDICATOR(), Reference< XStatusIndicator >() );
528 0 : mxImpl->mxInteractionHandler = mxImpl->maMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_INTERACTIONHANDLER(), Reference< XInteractionHandler >() );
529 0 : mxImpl->mxParentShape = mxImpl->maMediaDesc.getUnpackedValueOrDefault( "ParentShape", mxImpl->mxParentShape );
530 0 : mxImpl->maFilterData = mxImpl->maMediaDesc.getUnpackedValueOrDefault( "FilterData", Sequence< PropertyValue >() );
531 :
532 : // Check for ISO OOXML
533 0 : OUString sFilterName = mxImpl->maMediaDesc.getUnpackedValueOrDefault( "FilterName", OUString() );
534 : try
535 : {
536 0 : Reference<XMultiServiceFactory> xFactory(getComponentContext()->getServiceManager(), UNO_QUERY_THROW);
537 0 : Reference<XNameAccess> xFilters(xFactory->createInstance("com.sun.star.document.FilterFactory" ), UNO_QUERY_THROW );
538 0 : Any aValues = xFilters->getByName( sFilterName );
539 0 : Sequence<PropertyValue > aPropSeq;
540 0 : aValues >>= aPropSeq;
541 0 : SequenceAsHashMap aProps( aPropSeq );
542 :
543 0 : sal_Int32 nVersion = aProps.getUnpackedValueOrDefault( "FileFormatVersion", sal_Int32( 0 ) );
544 0 : mxImpl->meVersion = OoxmlVersion( nVersion );
545 : }
546 0 : catch ( const Exception& )
547 : {
548 : // Not ISO OOXML
549 0 : }
550 0 : }
551 :
552 0 : GraphicHelper* FilterBase::implCreateGraphicHelper() const
553 : {
554 : // default: return base implementation without any special behaviour
555 0 : return new GraphicHelper( mxImpl->mxComponentContext, mxImpl->mxTargetFrame, mxImpl->mxStorage );
556 : }
557 :
558 : } // namespace core
559 0 : } // namespace oox
560 :
561 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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