svx/source/xml/xmleohlp.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
  21 #include <com/sun/star/io/XStream.hpp>
  22 #include <com/sun/star/beans/XPropertySet.hpp>
  23 #include <com/sun/star/embed/XTransactedObject.hpp>
  24 #include <com/sun/star/embed/ElementModes.hpp>
  25 #include <com/sun/star/embed/XEmbeddedObject.hpp>
  26 #include <com/sun/star/embed/XEmbedPersist.hpp>
  27 #include <com/sun/star/embed/EmbedStates.hpp>
  28 #include <com/sun/star/embed/Aspects.hpp>
  29 #include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
  30 #include <sot/storage.hxx>
  31 #include <tools/debug.hxx>
  32 #include <sal/log.hxx>
  33 #include <unotools/streamwrap.hxx>
  34 #include <unotools/tempfile.hxx>
  35
  36 #include <svtools/embedhlp.hxx>
  37 #include <unotools/ucbstreamhelper.hxx>
  38 #include <comphelper/storagehelper.hxx>
  39 #include <comphelper/embeddedobjectcontainer.hxx>
  40
  41 #include <comphelper/fileformat.h>
  42 #include <cppuhelper/exc_hlp.hxx>
  43 #include <cppuhelper/implbase.hxx>
  44 #include <svx/xmleohlp.hxx>
  45 #include <map>
  46 #include <memory>
  47 #include <string_view>
  48
  49 using namespace ::osl;
  50 using namespace ::cppu;
  51 using namespace ::utl;
  52 using namespace ::com::sun::star;
  53 using namespace ::com::sun::star::document;
  54 using namespace ::com::sun::star::uno;
  55 using namespace ::com::sun::star::container;
  56 using namespace ::com::sun::star::io;
  57 using namespace ::com::sun::star::lang;
  58
  59 #define XML_CONTAINERSTORAGE_NAME_60        "Pictures"
  60 #define XML_CONTAINERSTORAGE_NAME       "ObjectReplacements"
  61 #define XML_EMBEDDEDOBJECT_URL_BASE     "vnd.sun.star.EmbeddedObject:"
  62 #define XML_EMBEDDEDOBJECTGRAPHIC_URL_BASE "vnd.sun.star.GraphicObject:"
  63
  64
  65 class OutputStorageWrapper_Impl : public ::cppu::WeakImplHelper<XOutputStream>
  66 {
  67     ::osl::Mutex    maMutex;
  68     Reference < XOutputStream > xOut;
  69     TempFile aTempFile;
  70     bool bStreamClosed : 1;
  71     SvStream* pStream;
  72
  73 public:
  74     OutputStorageWrapper_Impl();
  75
  76 // css::io::XOutputStream
  77     virtual void SAL_CALL writeBytes(const Sequence< sal_Int8 >& aData) override;
  78     virtual void SAL_CALL flush() override;
  79     virtual void SAL_CALL closeOutput() override;
  80
  81     SvStream*   GetStream();
  82 };
  83
  84 OutputStorageWrapper_Impl::OutputStorageWrapper_Impl()
  85     : bStreamClosed( false )
  86     , pStream(nullptr)
  87 {
  88     aTempFile.EnableKillingFile();
  89     pStream = aTempFile.GetStream( StreamMode::READWRITE );
  90     xOut = new OOutputStreamWrapper( *pStream );
  91 }
  92
  93 SvStream *OutputStorageWrapper_Impl::GetStream()
  94 {
  95     if( bStreamClosed )
  96         return pStream;
  97     return nullptr;
  98 }
  99
 100 void SAL_CALL OutputStorageWrapper_Impl::writeBytes(
 101         const Sequence< sal_Int8 >& aData)
 102 {
 103     MutexGuard          aGuard( maMutex );
 104     xOut->writeBytes( aData );
 105 }
 106
 107 void SAL_CALL OutputStorageWrapper_Impl::flush()
 108 {
 109     MutexGuard          aGuard( maMutex );
 110     xOut->flush();
 111 }
 112
 113 void SAL_CALL OutputStorageWrapper_Impl::closeOutput()
 114 {
 115     MutexGuard          aGuard( maMutex );
 116     xOut->closeOutput();
 117     bStreamClosed = true;
 118 }
 119
 120 const std::u16string_view gaReplacementGraphicsContainerStorageName( u"" XML_CONTAINERSTORAGE_NAME );
 121 const std::u16string_view gaReplacementGraphicsContainerStorageName60( u"" XML_CONTAINERSTORAGE_NAME_60 );
 122
 123 SvXMLEmbeddedObjectHelper::SvXMLEmbeddedObjectHelper() :
 124     WeakComponentImplHelper< XEmbeddedObjectResolver, XNameAccess >( maMutex ),
 125     mpDocPersist( nullptr ),
 126     meCreateMode( SvXMLEmbeddedObjectHelperMode::Read )
 127 {
 128 }
 129
 130 SvXMLEmbeddedObjectHelper::SvXMLEmbeddedObjectHelper( ::comphelper::IEmbeddedHelper& rDocPersist, SvXMLEmbeddedObjectHelperMode eCreateMode ) :
 131     WeakComponentImplHelper< XEmbeddedObjectResolver, XNameAccess >( maMutex ),
 132     mpDocPersist( nullptr ),
 133     meCreateMode( SvXMLEmbeddedObjectHelperMode::Read )
 134 {
 135     Init( nullptr, rDocPersist, eCreateMode );
 136 }
 137
 138 SvXMLEmbeddedObjectHelper::~SvXMLEmbeddedObjectHelper()
 139 {
 140 }
 141
 142 void SAL_CALL SvXMLEmbeddedObjectHelper::disposing()
 143 {
 144     if( mxTempStorage.is() )
 145     {
 146         mxTempStorage->dispose();
 147     }
 148 }
 149
 150 void SvXMLEmbeddedObjectHelper::splitObjectURL(const OUString& _aURLNoPar,
 151     OUString& rContainerStorageName,
 152     OUString& rObjectStorageName)
 153 {
 154     DBG_ASSERT(_aURLNoPar.isEmpty() || '#' != _aURLNoPar[0], "invalid object URL" );
 155     OUString aURLNoPar = _aURLNoPar;
 156
 157     sal_Int32 _nPos = aURLNoPar.lastIndexOf( '/' );
 158     if( -1 == _nPos )
 159     {
 160         rContainerStorageName.clear();
 161         rObjectStorageName = aURLNoPar;
 162     }
 163     else
 164     {
 165         //eliminate 'superfluous' slashes at start and end
 166         //#i103076# load objects with all allowed xlink:href syntaxes
 167         {
 168             //eliminate './' at start
 169             sal_Int32 nStart = 0;
 170             sal_Int32 nCount = aURLNoPar.getLength();
 171             if( aURLNoPar.startsWith( "./" ) )
 172             {
 173                 nStart = 2;
 174                 nCount -= 2;
 175             }
 176
 177             //eliminate '/' at end
 178             sal_Int32 nEnd = aURLNoPar.lastIndexOf( '/' );
 179             if( nEnd == aURLNoPar.getLength()-1 && nEnd != (nStart-1) )
 180                 nCount--;
 181
 182             aURLNoPar = aURLNoPar.copy( nStart, nCount );
 183         }
 184
 185         _nPos = aURLNoPar.lastIndexOf( '/' );
 186         if( _nPos >= 0 )
 187             rContainerStorageName = aURLNoPar.copy( 0, _nPos );
 188         rObjectStorageName = aURLNoPar.copy( _nPos+1 );
 189     }
 190 }
 191
 192 bool SvXMLEmbeddedObjectHelper::ImplGetStorageNames(
 193         const OUString& rURLStr,
 194         OUString& rContainerStorageName,
 195         OUString& rObjectStorageName,
 196         bool bInternalToExternal,
 197         bool *pGraphicRepl,
 198         bool *pOasisFormat ) const
 199 {
 200     // internal URL: vnd.sun.star.EmbeddedObject:<object-name>
 201     //           or: vnd.sun.star.EmbeddedObject:<path>/<object-name>
 202     // internal replacement images:
 203     //               vnd.sun.star.EmbeddedObjectGraphic:<object-name>
 204     //           or: vnd.sun.star.EmbeddedObjectGraphic:<path>/<object-name>
 205     // external URL: ./<path>/<object-name>
 206     //           or: <path>/<object-name>
 207     //           or: <object-name>
 208     // currently, path may only consist of a single directory name
 209     // it is also possible to have additional arguments at the end of URL: <main URL>[?<name>=<value>[,<name>=<value>]*]
 210
 211     if( pGraphicRepl )
 212         *pGraphicRepl = false;
 213
 214     if( pOasisFormat )
 215         *pOasisFormat = true; // the default value
 216
 217     if( rURLStr.isEmpty() )
 218         return false;
 219
 220     // get rid of arguments
 221     sal_Int32 nPos = rURLStr.indexOf( '?' );
 222     OUString aURLNoPar;
 223     if ( nPos == -1 )
 224         aURLNoPar = rURLStr;
 225     else
 226     {
 227         aURLNoPar = rURLStr.copy( 0, nPos );
 228
 229         // check the arguments
 230         nPos++;
 231         while( nPos >= 0 && nPos < rURLStr.getLength() )
 232         {
 233             OUString aToken = rURLStr.getToken( 0, ',', nPos );
 234             if ( aToken.equalsIgnoreAsciiCase( "oasis=false" ) )
 235             {
 236                 if ( pOasisFormat )
 237                     *pOasisFormat = false;
 238                 break;
 239             }
 240             else
 241             {
 242                 SAL_WARN( "svx", "invalid arguments was found in URL!" );
 243             }
 244         }
 245     }
 246
 247     if( bInternalToExternal )
 248     {
 249         nPos = aURLNoPar.indexOf( ':' );
 250         if( -1 == nPos )
 251             return false;
 252         bool bObjUrl = aURLNoPar.startsWith( XML_EMBEDDEDOBJECT_URL_BASE );
 253         bool bGrUrl = !bObjUrl &&
 254               aURLNoPar.startsWith( XML_EMBEDDEDOBJECTGRAPHIC_URL_BASE );
 255         if( !(bObjUrl || bGrUrl) )
 256             return false;
 257
 258         sal_Int32 nPathStart = nPos + 1;
 259         nPos = aURLNoPar.lastIndexOf( '/' );
 260         if( -1 == nPos )
 261         {
 262             rContainerStorageName.clear();
 263             rObjectStorageName = aURLNoPar.copy( nPathStart );
 264         }
 265         else if( nPos > nPathStart )
 266         {
 267             rContainerStorageName = aURLNoPar.copy( nPathStart, nPos-nPathStart);
 268             rObjectStorageName = aURLNoPar.copy( nPos+1 );
 269         }
 270         else
 271             return false;
 272
 273         if( bGrUrl )
 274         {
 275             bool bOASIS = mxRootStorage.is() &&
 276                 ( SotStorage::GetVersion( mxRootStorage ) > SOFFICE_FILEFORMAT_60 );
 277             rContainerStorageName = bOASIS
 278                     ? gaReplacementGraphicsContainerStorageName
 279                     : gaReplacementGraphicsContainerStorageName60;
 280
 281             if( pGraphicRepl )
 282                 *pGraphicRepl = true;
 283         }
 284
 285
 286     }
 287     else
 288     {
 289         splitObjectURL(aURLNoPar, rContainerStorageName, rObjectStorageName);
 290     }
 291
 292     if( -1 != rContainerStorageName.indexOf( '/' ) )
 293     {
 294         OSL_FAIL( "SvXMLEmbeddedObjectHelper: invalid path name" );
 295         return false;
 296     }
 297
 298     return true;
 299 }
 300
 301 uno::Reference < embed::XStorage > const & SvXMLEmbeddedObjectHelper::ImplGetContainerStorage(
 302         const OUString& rStorageName )
 303 {
 304     DBG_ASSERT( -1 == rStorageName.indexOf( '/' ) &&
 305                 -1 == rStorageName.indexOf( '\\' ),
 306                 "nested embedded storages aren't supported" );
 307     if( !mxContainerStorage.is() ||
 308         ( rStorageName != maCurContainerStorageName ) )
 309     {
 310         if( mxContainerStorage.is() &&
 311             !maCurContainerStorageName.isEmpty() &&
 312             SvXMLEmbeddedObjectHelperMode::Write == meCreateMode )
 313         {
 314             uno::Reference < embed::XTransactedObject > xTrans( mxContainerStorage, uno::UNO_QUERY );
 315             if ( xTrans.is() )
 316                 xTrans->commit();
 317         }
 318
 319         if( !rStorageName.isEmpty() && mxRootStorage.is() )
 320         {
 321             sal_Int32 nMode = SvXMLEmbeddedObjectHelperMode::Write == meCreateMode
 322                                     ? ::embed::ElementModes::READWRITE
 323                                     : ::embed::ElementModes::READ;
 324             mxContainerStorage = mxRootStorage->openStorageElement( rStorageName,
 325                                                              nMode );
 326         }
 327         else
 328         {
 329             mxContainerStorage = mxRootStorage;
 330         }
 331         maCurContainerStorageName = rStorageName;
 332     }
 333
 334     return mxContainerStorage;
 335 }
 336
 337 void SvXMLEmbeddedObjectHelper::ImplReadObject(
 338         const OUString& rContainerStorageName,
 339         OUString& rObjName,
 340         const SvGlobalName *, // pClassId, see "TODO/LATER" below
 341         SvStream* pTemp )
 342 {
 343     uno::Reference < embed::XStorage > xDocStor( mpDocPersist->getStorage() );
 344     uno::Reference < embed::XStorage > xCntnrStor( ImplGetContainerStorage( rContainerStorageName ) );
 345
 346     if( !xCntnrStor.is() && !pTemp )
 347         return;
 348
 349     OUString aSrcObjName( rObjName );
 350     comphelper::EmbeddedObjectContainer& rContainer = mpDocPersist->getEmbeddedObjectContainer();
 351
 352     // Is the object name unique?
 353     // if the object is already instantiated by GetEmbeddedObject
 354     // that means that the duplication is being loaded
 355     bool bDuplicate = rContainer.HasInstantiatedEmbeddedObject( rObjName );
 356     DBG_ASSERT( !bDuplicate, "An object in the document is referenced twice!" );
 357
 358     if( xDocStor != xCntnrStor || pTemp || bDuplicate )
 359     {
 360         // TODO/LATER: make this altogether a method in the EmbeddedObjectContainer
 361
 362         // create a unique name for the duplicate object
 363         if( bDuplicate )
 364             rObjName = rContainer.CreateUniqueObjectName();
 365
 366         if( pTemp )
 367         {
 368             try
 369             {
 370                 pTemp->Seek( 0 );
 371                 uno::Reference < io::XStream > xStm = xDocStor->openStreamElement( rObjName,
 372                         embed::ElementModes::READWRITE | embed::ElementModes::TRUNCATE );
 373                 std::unique_ptr<SvStream> pStream(::utl::UcbStreamHelper::CreateStream( xStm ));
 374                 pTemp->ReadStream( *pStream );
 375                 pStream.reset();
 376
 377                 // TODO/LATER: what to do when other types of objects are based on substream persistence?
 378                 // This is an ole object
 379                 uno::Reference< beans::XPropertySet > xProps( xStm, uno::UNO_QUERY_THROW );
 380                 xProps->setPropertyValue(
 381                     "MediaType",
 382                     uno::makeAny( OUString( "application/vnd.sun.star.oleobject" ) ) );
 383
 384                 xStm->getOutputStream()->closeOutput();
 385             }
 386             catch ( uno::Exception& )
 387             {
 388                 return;
 389             }
 390         }
 391         else
 392         {
 393             try
 394             {
 395                 xCntnrStor->copyElementTo( aSrcObjName, xDocStor, rObjName );
 396             }
 397             catch ( uno::Exception& )
 398             {
 399                 return;
 400             }
 401         }
 402     }
 403
 404     // make object known to the container
 405     // TODO/LATER: could be done a little bit more efficient!
 406     OUString aName( rObjName );
 407
 408     // TODO/LATER: The provided pClassId is ignored for now.
 409     //             The stream contains OLE storage internally and this storage already has a class id specifying the
 410     //             server that was used to create the object. pClassId could be used to specify the server that should
 411     //             be used for the next opening, but this information seems to be out of the file format responsibility
 412     //             area.
 413     OUString const baseURL(mpDocPersist->getDocumentBaseURL());
 414     rContainer.GetEmbeddedObject(aName, &baseURL);
 415 }
 416
 417 OUString SvXMLEmbeddedObjectHelper::ImplInsertEmbeddedObjectURL(
 418         const OUString& rURLStr )
 419 {
 420     OUString sRetURL;
 421
 422     OUString aContainerStorageName, aObjectStorageName;
 423     if( !ImplGetStorageNames( rURLStr, aContainerStorageName,
 424                               aObjectStorageName,
 425                               SvXMLEmbeddedObjectHelperMode::Write == meCreateMode ) )
 426         return sRetURL;
 427
 428     if( SvXMLEmbeddedObjectHelperMode::Read == meCreateMode )
 429     {
 430         OutputStorageWrapper_Impl *pOut = nullptr;
 431         std::map< OUString, rtl::Reference<OutputStorageWrapper_Impl> >::iterator aIter;
 432
 433         if( mxStreamMap )
 434         {
 435             aIter = mxStreamMap->find( rURLStr );
 436             if( aIter != mxStreamMap->end() && aIter->second.is() )
 437                 pOut = aIter->second.get();
 438         }
 439
 440         SvGlobalName aClassId, *pClassId = nullptr;
 441         sal_Int32 nPos = aObjectStorageName.lastIndexOf( '!' );
 442         if( -1 != nPos && aClassId.MakeId( aObjectStorageName.copy( nPos+1 ) ) )
 443         {
 444             aObjectStorageName = aObjectStorageName.copy( 0, nPos );
 445             pClassId = &aClassId;
 446         }
 447
 448         ImplReadObject( aContainerStorageName, aObjectStorageName, pClassId, pOut ? pOut->GetStream() : nullptr );
 449         sRetURL = XML_EMBEDDEDOBJECT_URL_BASE + aObjectStorageName;
 450
 451         if( pOut )
 452         {
 453             mxStreamMap->erase( aIter );
 454         }
 455     }
 456     else
 457     {
 458         // Objects are written using ::comphelper::IEmbeddedHelper::SaveAs
 459         sRetURL = "./";
 460         if( !aContainerStorageName.isEmpty() )
 461         {
 462             sRetURL += aContainerStorageName + "/";
 463         }
 464         sRetURL += aObjectStorageName;
 465     }
 466
 467     return sRetURL;
 468 }
 469
 470 uno::Reference< io::XInputStream > SvXMLEmbeddedObjectHelper::ImplGetReplacementImage(
 471                                             const uno::Reference< embed::XEmbeddedObject >& xObj )
 472 {
 473     uno::Reference< io::XInputStream > xStream;
 474
 475     if( xObj.is() )
 476     {
 477         try
 478         {
 479             bool bSwitchBackToLoaded = false;
 480             sal_Int32 nCurState = xObj->getCurrentState();
 481             if ( nCurState == embed::EmbedStates::LOADED || nCurState == embed::EmbedStates::RUNNING )
 482             {
 483                 // means that the object is not active
 484                 // copy replacement image from old to new container
 485                 OUString aMediaType;
 486                 xStream = mpDocPersist->getEmbeddedObjectContainer().GetGraphicStream( xObj, &aMediaType );
 487             }
 488
 489             if ( !xStream.is() )
 490             {
 491                 // the image must be regenerated
 492                 // TODO/LATER: another aspect could be used
 493                 if ( nCurState == embed::EmbedStates::LOADED )
 494                     bSwitchBackToLoaded = true;
 495
 496                 OUString aMediaType;
 497                 xStream = svt::EmbeddedObjectRef::GetGraphicReplacementStream(
 498                                                     embed::Aspects::MSOLE_CONTENT,
 499                                                     xObj,
 500                                                     &aMediaType );
 501             }
 502
 503             if ( bSwitchBackToLoaded )
 504                 // switch back to loaded state; that way we have a minimum cache confusion
 505                 xObj->changeState( embed::EmbedStates::LOADED );
 506         }
 507         catch( uno::Exception& )
 508         {}
 509     }
 510
 511     return xStream;
 512 }
 513
 514 void SvXMLEmbeddedObjectHelper::Init(
 515         const uno::Reference < embed::XStorage >& rRootStorage,
 516         ::comphelper::IEmbeddedHelper& rPersist,
 517         SvXMLEmbeddedObjectHelperMode eCreateMode )
 518 {
 519     mxRootStorage = rRootStorage;
 520     mpDocPersist = &rPersist;
 521     meCreateMode = eCreateMode;
 522 }
 523
 524 rtl::Reference<SvXMLEmbeddedObjectHelper> SvXMLEmbeddedObjectHelper::Create(
 525         const uno::Reference < embed::XStorage >& rRootStorage,
 526         ::comphelper::IEmbeddedHelper& rDocPersist,
 527         SvXMLEmbeddedObjectHelperMode eCreateMode )
 528 {
 529     rtl::Reference<SvXMLEmbeddedObjectHelper> pThis(new SvXMLEmbeddedObjectHelper);
 530
 531     pThis->Init( rRootStorage, rDocPersist, eCreateMode );
 532
 533     return pThis;
 534 }
 535
 536 rtl::Reference<SvXMLEmbeddedObjectHelper> SvXMLEmbeddedObjectHelper::Create(
 537         ::comphelper::IEmbeddedHelper& rDocPersist,
 538         SvXMLEmbeddedObjectHelperMode eCreateMode )
 539 {
 540     rtl::Reference<SvXMLEmbeddedObjectHelper> pThis(new SvXMLEmbeddedObjectHelper);
 541
 542     pThis->Init( nullptr, rDocPersist, eCreateMode );
 543
 544     return pThis;
 545 }
 546
 547 OUString SAL_CALL SvXMLEmbeddedObjectHelper::resolveEmbeddedObjectURL(const OUString& rURL)
 548 {
 549     MutexGuard          aGuard( maMutex );
 550
 551     OUString sRet;
 552     try
 553     {
 554         sRet = ImplInsertEmbeddedObjectURL(rURL);
 555     }
 556     catch (const RuntimeException&)
 557     {
 558         throw;
 559     }
 560     catch (const Exception&)
 561     {
 562         css::uno::Any anyEx = cppu::getCaughtException();
 563         throw WrappedTargetRuntimeException(
 564             "SvXMLEmbeddedObjectHelper::resolveEmbeddedObjectURL non-RuntimeException",
 565             static_cast<uno::XWeak*>(this), anyEx);
 566     }
 567     return sRet;
 568 }
 569
 570 // XNameAccess: alien objects!
 571 Any SAL_CALL SvXMLEmbeddedObjectHelper::getByName(
 572         const OUString& rURLStr )
 573 {
 574     MutexGuard          aGuard( maMutex );
 575     Any aRet;
 576     if( SvXMLEmbeddedObjectHelperMode::Read == meCreateMode )
 577     {
 578         Reference < XOutputStream > xStrm;
 579         if( mxStreamMap )
 580         {
 581             auto aIter = mxStreamMap->find( rURLStr );
 582             if( aIter != mxStreamMap->end() && aIter->second.is() )
 583                 xStrm = aIter->second.get();
 584         }
 585         if( !xStrm.is() )
 586         {
 587             rtl::Reference<OutputStorageWrapper_Impl> xOut = new OutputStorageWrapper_Impl;
 588             if( !mxStreamMap )
 589                 mxStreamMap.emplace();
 590             (*mxStreamMap)[rURLStr] = xOut;
 591             xStrm = xOut.get();
 592         }
 593
 594         aRet <<= xStrm;
 595     }
 596     else
 597     {
 598         bool bGraphicRepl = false;
 599         bool bOasisFormat = true;
 600         Reference < XInputStream > xStrm;
 601         OUString aContainerStorageName, aObjectStorageName;
 602         if( ImplGetStorageNames( rURLStr, aContainerStorageName,
 603                                  aObjectStorageName,
 604                                  true,
 605                                  &bGraphicRepl,
 606                                  &bOasisFormat ) )
 607         {
 608             try
 609             {
 610                 comphelper::EmbeddedObjectContainer& rContainer =
 611                         mpDocPersist->getEmbeddedObjectContainer();
 612
 613                 Reference < embed::XEmbeddedObject > xObj = rContainer.GetEmbeddedObject( aObjectStorageName );
 614                 DBG_ASSERT( xObj.is(), "Didn't get object" );
 615
 616                 if( xObj.is() )
 617                 {
 618                     if( bGraphicRepl )
 619                     {
 620                         xStrm = ImplGetReplacementImage( xObj );
 621                     }
 622                     else
 623                     {
 624                         Reference < embed::XEmbedPersist > xPersist( xObj, UNO_QUERY );
 625                         if( xPersist.is() )
 626                         {
 627                             if( !mxTempStorage.is() )
 628                                 mxTempStorage =
 629                                     comphelper::OStorageHelper::GetTemporaryStorage();
 630                             Sequence < beans::PropertyValue > aDummy( 0 ), aEmbDescr( 1 );
 631                             aEmbDescr[0].Name = "StoreVisualReplacement";
 632                             aEmbDescr[0].Value <<= !bOasisFormat;
 633                             if ( !bOasisFormat )
 634                             {
 635                                 uno::Reference< io::XInputStream > xGrInStream = ImplGetReplacementImage( xObj );
 636                                 if ( xGrInStream.is() )
 637                                 {
 638                                     aEmbDescr.realloc( 2 );
 639                                     aEmbDescr[1].Name = "VisualReplacement";
 640                                     aEmbDescr[1].Value <<= xGrInStream;
 641                                 }
 642                             }
 643
 644                             xPersist->storeToEntry( mxTempStorage, aObjectStorageName,
 645                                                     aDummy, aEmbDescr );
 646                             Reference < io::XStream > xStream =
 647                                 mxTempStorage->openStreamElement(
 648                                                         aObjectStorageName,
 649                                                         embed::ElementModes::READ);
 650                             if( xStream.is() )
 651                                 xStrm = xStream->getInputStream();
 652                         }
 653                     }
 654                 }
 655             }
 656             catch ( uno::Exception& )
 657             {
 658             }
 659         }
 660
 661         aRet <<= xStrm;
 662     }
 663
 664     return aRet;
 665 }
 666
 667 Sequence< OUString > SAL_CALL SvXMLEmbeddedObjectHelper::getElementNames()
 668 {
 669    return {};
 670 }
 671
 672 sal_Bool SAL_CALL SvXMLEmbeddedObjectHelper::hasByName( const OUString& rURLStr )
 673 {
 674     MutexGuard          aGuard( maMutex );
 675     if( SvXMLEmbeddedObjectHelperMode::Read == meCreateMode )
 676     {
 677         return true;
 678     }
 679     else
 680     {
 681         OUString aContainerStorageName, aObjectStorageName;
 682         if( !ImplGetStorageNames( rURLStr, aContainerStorageName,
 683                                   aObjectStorageName,
 684                                   true ) )
 685             return false;
 686
 687         comphelper::EmbeddedObjectContainer& rContainer = mpDocPersist->getEmbeddedObjectContainer();
 688         return !aObjectStorageName.isEmpty() &&
 689                rContainer.HasEmbeddedObject( aObjectStorageName );
 690     }
 691 }
 692
 693 // XNameAccess
 694 Type SAL_CALL SvXMLEmbeddedObjectHelper::getElementType()
 695 {
 696     MutexGuard          aGuard( maMutex );
 697     if( SvXMLEmbeddedObjectHelperMode::Read == meCreateMode )
 698         return cppu::UnoType<XOutputStream>::get();
 699     else
 700         return cppu::UnoType<XInputStream>::get();
 701 }
 702
 703 sal_Bool SAL_CALL SvXMLEmbeddedObjectHelper::hasElements()
 704 {
 705     MutexGuard          aGuard( maMutex );
 706     if( SvXMLEmbeddedObjectHelperMode::Read == meCreateMode )
 707     {
 708         return true;
 709     }
 710     else
 711     {
 712         comphelper::EmbeddedObjectContainer& rContainer = mpDocPersist->getEmbeddedObjectContainer();
 713         return rContainer.HasEmbeddedObjects();
 714     }
 715 }
 716
 717 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */