lotuswordpro/source/filter/lwpfilter.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
   3  *
   4  *  The Contents of this file are made available subject to the terms of
   5  *  either of the following licenses
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   7  *         - GNU Lesser General Public License Version 2.1
   8  *         - Sun Industry Standards Source License Version 1.1
   9  *
  10  *  Sun Microsystems Inc., October, 2000
  11  *
  12  *  GNU Lesser General Public License Version 2.1
  13  *  =============================================
  14  *  Copyright 2000 by Sun Microsystems, Inc.
  15  *  901 San Antonio Road, Palo Alto, CA 94303, USA
  16  *
  17  *  This library is free software; you can redistribute it and/or
  18  *  modify it under the terms of the GNU Lesser General Public
  19  *  License version 2.1, as published by the Free Software Foundation.
  20  *
  21  *  This library is distributed in the hope that it will be useful,
  22  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24  *  Lesser General Public License for more details.
  25  *
  26  *  You should have received a copy of the GNU Lesser General Public
  27  *  License along with this library; if not, write to the Free Software
  28  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  *  MA  02111-1307  USA
  30  *
  31  *
  32  *  Sun Industry Standards Source License Version 1.1
  33  *  =================================================
  34  *  The contents of this file are subject to the Sun Industry Standards
  35  *  Source License Version 1.1 (the "License"); You may not use this file
  36  *  except in compliance with the License. You may obtain a copy of the
  37  *  License at http://www.openoffice.org/license.html.
  38  *
  39  *  Software provided under this License is provided on an "AS IS" basis,
  40  *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  41  *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
  42  *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
  43  *  See the License for the specific provisions governing your rights and
  44  *  obligations concerning the Software.
  45  *
  46  *  The Initial Developer of the Original Code is: IBM Corporation
  47  *
  48  *  Copyright: 2008 by IBM Corporation
  49  *
  50  *  All Rights Reserved.
  51  *
  52  *  Contributor(s): _______________________________________
  53  *
  54  *
  55  ************************************************************************/
  56 /*************************************************************************
  57  * @file
  58  * Circle object.
  59  ************************************************************************/
  60 #include "lwpfilter.hxx"
  61 #include <xfilter/xfglobal.hxx>
  62 #include <xfilter/xfsaxstream.hxx>
  63 #include "lwp9reader.hxx"
  64 #include <lwpsvstream.hxx>
  65
  66 #include <tools/stream.hxx>
  67 #include <com/sun/star/io/IOException.hpp>
  68 #include <com/sun/star/text/XTextDocument.hpp>
  69
  70 #include <memory>
  71
  72 using namespace ::cppu;
  73 using namespace ::com::sun::star::lang;
  74 using namespace ::com::sun::star::text;
  75 using namespace ::com::sun::star::io;
  76 using namespace ::com::sun::star::beans;
  77 using namespace ::com::sun::star;
  78
  79 /**
  80  * @descr   decompressed small file
  81  * @param   pCompressed - real file stream
  82  * @param   pDecompressed - file decompressed, create inside, caller should delete it
  83  * @return  success - sal_True, fail - sal_False
  84  */
  85 #include "bento.hxx"
  86 using namespace OpenStormBento;
  87 #include "explode.hxx"
  88 static bool Decompress(SvStream* pCompressed, SvStream*& pOutDecompressed)
  89 {
  90     pCompressed->Seek(0);
  91     std::unique_ptr<SvMemoryStream> aDecompressed(new SvMemoryStream(4096, 4096));
  92     unsigned char buffer[512];
  93     pCompressed->ReadBytes(buffer, 16);
  94     aDecompressed->WriteBytes(buffer, 16);
  95
  96     LwpSvStream aLwpStream(pCompressed);
  97     std::unique_ptr<OpenStormBento::LtcBenContainer> pBentoContainer;
  98     {
  99         BenError ulRet = BenOpenContainer(&aLwpStream, &pBentoContainer);
 100         if (ulRet != BenErr_OK)
 101             return false;
 102     }
 103
 104     std::unique_ptr<LtcUtBenValueStream> aWordProData(
 105         pBentoContainer->FindValueStreamWithPropertyName("WordProData"));
 106
 107     if (!aWordProData)
 108         return false;
 109
 110     // decompressing
 111     Decompression decompress(aWordProData.get(), aDecompressed.get());
 112     if (0 != decompress.explode())
 113         return false;
 114
 115     sal_uInt64 nPos = aWordProData->GetSize();
 116     nPos += 0x10;
 117
 118     pCompressed->Seek(nPos);
 119     while (sal_uInt32 iRead = pCompressed->ReadBytes(buffer, 512))
 120         aDecompressed->WriteBytes(buffer, iRead);
 121
 122     // disable stream growing past its current size
 123     aDecompressed->SetResizeOffset(0);
 124
 125     //transfer ownership of aDecompressed's ptr
 126     pOutDecompressed = aDecompressed.release();
 127     return true;
 128 }
 129
 130 /**
 131  * @descr   Get LwpSvStream, if small file, both compressed/decompressed stream
 132  *                  Otherwise, only normal stream
 133  * @param   pStream - real file stream
 134  * @param    LwpSvStream * , created inside, deleted outside
 135  * @param      sal_Bool, sal_True -
 136  */
 137 static bool GetLwpSvStream(SvStream* pStream, LwpSvStream*& pLwpSvStream)
 138 {
 139     SvStream* pDecompressed = nullptr;
 140
 141     pStream->Seek(0x10);
 142     sal_uInt32 nTag(0);
 143     pStream->ReadUInt32(nTag);
 144     if (nTag != 0x3750574c) // "LWP7"
 145     {
 146         // small file, needs decompression
 147         if (!Decompress(pStream, pDecompressed))
 148         {
 149             pLwpSvStream = nullptr;
 150             return true;
 151         }
 152         pStream->Seek(0);
 153         pDecompressed->Seek(0);
 154     }
 155
 156     pLwpSvStream = nullptr;
 157     bool bCompressed = false;
 158     if (pDecompressed)
 159     {
 160         LwpSvStream* pOriginalLwpSvStream = new LwpSvStream(pStream);
 161         pLwpSvStream = new LwpSvStream(pDecompressed, pOriginalLwpSvStream);
 162         bCompressed = true;
 163     }
 164     else
 165     {
 166         pLwpSvStream = new LwpSvStream(pStream);
 167     }
 168     return bCompressed;
 169 }
 170 int ReadWordproFile(SvStream& rStream,
 171                     uno::Reference<css::xml::sax::XDocumentHandler> const& xHandler)
 172 {
 173     int nRet = 0;
 174     try
 175     {
 176         LwpSvStream* pRawLwpSvStream = nullptr;
 177         std::unique_ptr<LwpSvStream> aLwpSvStream;
 178         std::unique_ptr<LwpSvStream> aCompressedLwpSvStream;
 179         std::unique_ptr<SvStream> aDecompressed;
 180         if (GetLwpSvStream(&rStream, pRawLwpSvStream) && pRawLwpSvStream)
 181         {
 182             SvStream* pDecompressed = pRawLwpSvStream->GetStream();
 183             if (pDecompressed)
 184             {
 185                 aDecompressed.reset(pDecompressed);
 186                 aCompressedLwpSvStream.reset(pRawLwpSvStream->GetCompressedStream());
 187             }
 188         }
 189
 190         if (!pRawLwpSvStream)
 191         {
 192             // nothing returned, fail when uncompressing
 193             return 1;
 194         }
 195
 196         aLwpSvStream.reset(pRawLwpSvStream);
 197
 198         XFSaxStream aStrm(xHandler);
 199         Lwp9Reader reader(aLwpSvStream.get(), &aStrm);
 200         //Reset all static objects,because this function may be called many times.
 201         XFGlobalReset();
 202         const bool bOk = reader.Read();
 203         if (!bOk)
 204             nRet = 1;
 205     }
 206     catch (...)
 207     {
 208         return 1;
 209     }
 210     return nRet;
 211 }
 212
 213 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */