sfx2/source/bastyp/mieclip.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 #include <sal/config.h>
  21
  22 #include <o3tl/safeint.hxx>
  23 #include <o3tl/string_view.hxx>
  24 #include <tools/stream.hxx>
  25 #include <comphelper/string.hxx>
  26
  27 #include <sfx2/mieclip.hxx>
  28
  29 MSE40HTMLClipFormatObj::~MSE40HTMLClipFormatObj()
  30 {
  31 }
  32
  33 SvStream* MSE40HTMLClipFormatObj::IsValid( SvStream& rStream )
  34 {
  35     bool bRet = false;
  36     pStrm.reset();
  37
  38     OStringBuffer sLine;
  39     sal_Int32 nStt = -1, nEnd = -1, nFragStart = -1, nFragEnd = -1;
  40     sal_Int32 nIndex = 0;
  41
  42     rStream.Seek(STREAM_SEEK_TO_BEGIN);
  43     rStream.ResetError();
  44
  45     if( rStream.ReadLine( sLine ) &&
  46         o3tl::getToken(sLine, 0, ':', nIndex ) == "Version" )
  47     {
  48         while( rStream.ReadLine( sLine ) )
  49         {
  50             nIndex = 0;
  51             std::string_view sTmp(o3tl::getToken(sLine, 0, ':', nIndex));
  52             std::string_view sView(sLine);
  53             if (sTmp == "StartHTML")
  54                 nStt = o3tl::toInt32(sView.substr(nIndex));
  55             else if (sTmp == "EndHTML")
  56                 nEnd = o3tl::toInt32(sView.substr(nIndex));
  57             else if (sTmp == "StartFragment")
  58                 nFragStart = o3tl::toInt32(sView.substr(nIndex));
  59             else if (sTmp == "EndFragment")
  60                 nFragEnd = o3tl::toInt32(sView.substr(nIndex));
  61             else if (sTmp == "SourceURL")
  62                 sBaseURL = OStringToOUString( sView.substr(nIndex), RTL_TEXTENCODING_UTF8 );
  63
  64             if (nEnd >= 0 && nStt >= 0 &&
  65                 (!sBaseURL.isEmpty() || rStream.Tell() >= o3tl::make_unsigned(nStt)))
  66             {
  67                 bRet = true;
  68                 break;
  69             }
  70         }
  71     }
  72
  73     if( bRet )
  74     {
  75         rStream.Seek( nStt );
  76
  77         pStrm.reset( new SvMemoryStream( ( nEnd - nStt < 0x10000l
  78                                         ? nEnd - nStt + 32
  79                                         : 0 )) );
  80         pStrm->WriteStream( rStream );
  81         pStrm->SetStreamSize( nEnd - nStt + 1 );
  82         pStrm->Seek( STREAM_SEEK_TO_BEGIN );
  83         return pStrm.get();
  84     }
  85
  86     if (nFragStart > 0 && nFragEnd > 0 && nFragEnd > nFragStart)
  87     {
  88         size_t nSize = nFragEnd - nFragStart + 1;
  89         if (nSize < 0x10000L)
  90         {
  91             rStream.Seek(nFragStart);
  92             pStrm.reset( new SvMemoryStream(nSize) );
  93             pStrm->WriteStream( rStream );
  94             pStrm->SetStreamSize(nSize);
  95             pStrm->Seek(STREAM_SEEK_TO_BEGIN);
  96             return pStrm.get();
  97         }
  98     }
  99
 100     return nullptr;
 101 }
 102
 103 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */