sot/source/sdstor/stgole.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 <memory>
  21 #include <algorithm>
  22
  23 #include "stgelem.hxx"
  24 #include "stgole.hxx"
  25 #include <sot/storinfo.hxx>
  26
  27 ///////////////////////// class StgInternalStream
  28
  29 StgInternalStream::StgInternalStream( BaseStorage& rStg, const OUString& rName, bool bWr )
  30 {
  31     m_isWritable = true;
  32     StreamMode nMode = bWr
  33                  ? StreamMode::WRITE | StreamMode::SHARE_DENYALL
  34                  : StreamMode::READ | StreamMode::SHARE_DENYWRITE | StreamMode::NOCREATE;
  35     m_pStrm.reset( rStg.OpenStream( rName, nMode ) );
  36
  37     // set the error code right here in the stream
  38     SetError( rStg.GetError() );
  39     SetBufferSize( 1024 );
  40 }
  41
  42 StgInternalStream::~StgInternalStream()
  43 {
  44 }
  45
  46 std::size_t StgInternalStream::GetData(void* pData, std::size_t nSize)
  47 {
  48     if( m_pStrm )
  49     {
  50         nSize = m_pStrm->Read( pData, nSize );
  51         SetError( m_pStrm->GetError() );
  52         return nSize;
  53     }
  54     else
  55         return 0;
  56 }
  57
  58 std::size_t StgInternalStream::PutData(const void* pData, std::size_t nSize)
  59 {
  60     if( m_pStrm )
  61     {
  62         nSize = m_pStrm->Write( pData, nSize );
  63         SetError( m_pStrm->GetError() );
  64         return nSize;
  65     }
  66     else
  67         return 0;
  68 }
  69
  70 sal_uInt64 StgInternalStream::SeekPos(sal_uInt64 const nPos)
  71 {
  72     return m_pStrm ? m_pStrm->Seek( nPos ) : 0;
  73 }
  74
  75 void StgInternalStream::FlushData()
  76 {
  77     if( m_pStrm )
  78     {
  79         m_pStrm->Flush();
  80         SetError( m_pStrm->GetError() );
  81     }
  82 }
  83
  84 void StgInternalStream::Commit()
  85 {
  86     Flush();
  87     m_pStrm->Commit();
  88 }
  89
  90 ///////////////////////// class StgCompObjStream
  91
  92 StgCompObjStream::StgCompObjStream( BaseStorage& rStg, bool bWr )
  93     : StgInternalStream( rStg, "\1CompObj", bWr )
  94 {
  95 }
  96
  97 bool StgCompObjStream::Load()
  98 {
  99     memset( &m_aClsId, 0, sizeof( ClsId ) );
 100     m_nCbFormat = SotClipboardFormatId::NONE;
 101     m_aUserName.clear();
 102     if( GetError() != ERRCODE_NONE )
 103         return false;
 104     Seek( 8 );     // skip the first part
 105     sal_Int32 nMarker = 0;
 106     ReadInt32( nMarker );
 107     if( nMarker == -1 )
 108     {
 109         ReadClsId( *this, m_aClsId );
 110         sal_Int32 nLen1 = 0;
 111         ReadInt32( nLen1 );
 112         if ( nLen1 > 0 )
 113         {
 114             // higher bits are ignored
 115             sal_uLong nStrLen = ::std::min( nLen1, sal_Int32(0xFFFE) );
 116
 117             std::unique_ptr<sal_Char[]> p(new sal_Char[ nStrLen+1 ]);
 118             p[nStrLen] = 0;
 119             if (ReadBytes( p.get(), nStrLen ) == nStrLen)
 120             {
 121                 //The encoding here is "ANSI", which is pretty useless seeing as
 122                 //the actual codepage used doesn't seem to be specified/stored
 123                 //anywhere :-(. Might as well pick 1252 and be consistent on
 124                 //all platforms and envs
 125                 //https://bz.apache.org/ooo/attachment.cgi?id=68668
 126                 //for a good edge-case example
 127                 m_aUserName = OUString(p.get(), nStrLen, RTL_TEXTENCODING_MS_1252);
 128                 m_nCbFormat = ReadClipboardFormat( *this );
 129             }
 130             else
 131                 SetError( SVSTREAM_GENERALERROR );
 132         }
 133     }
 134     return GetError() == ERRCODE_NONE;
 135 }
 136
 137 bool StgCompObjStream::Store()
 138 {
 139     if( GetError() != ERRCODE_NONE )
 140         return false;
 141     Seek( 0 );
 142     OString aAsciiUserName(OUStringToOString(m_aUserName, RTL_TEXTENCODING_MS_1252));
 143     WriteInt16( 1 );          // Version?
 144     WriteInt16( -2 );                     // 0xFFFE = Byte Order Indicator
 145     WriteInt32( 0x0A03 );         // Windows 3.10
 146     WriteInt32( -1 );
 147     WriteClsId( *this, m_aClsId );             // Class ID
 148     WriteInt32( aAsciiUserName.getLength() + 1 );
 149     WriteOString( aAsciiUserName );
 150     WriteUChar( 0 );             // string terminator
 151     WriteClipboardFormat( *this, m_nCbFormat );
 152     WriteInt32( 0 );             // terminator
 153     Commit();
 154     return GetError() == ERRCODE_NONE;
 155 }
 156
 157 /////////////////////////// class StgOleStream
 158
 159 StgOleStream::StgOleStream( BaseStorage& rStg )
 160     : StgInternalStream( rStg, "\1Ole", true )
 161 {
 162 }
 163
 164 bool StgOleStream::Store()
 165 {
 166     if( GetError() != ERRCODE_NONE )
 167         return false;
 168
 169     Seek( 0 );
 170     WriteInt32( 0x02000001 );         // OLE version, format
 171     WriteInt32( 0 );             // Object flags
 172     WriteInt32( 0 );                  // Update Options
 173     WriteInt32( 0 );                  // reserved
 174     WriteInt32( 0 );                 // Moniker 1
 175     Commit();
 176     return GetError() == ERRCODE_NONE;
 177 }
 178
 179 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */