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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <cstdio>
#include <cstring>
#include <list>
#include <map>
#include <vector>
#include <iostream>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xmlIO.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
#include <libxslt/variables.h>
#include <rtl/ustrbuf.hxx>
#include <sax/tools/converter.hxx>
#include <package/Inflater.hxx>
#include <package/Deflater.hxx>
#include <cppuhelper/factory.hxx>
#include <comphelper/processfactory.hxx>
#include <com/sun/star/uno/Any.hxx>
#include <com/sun/star/uno/XInterface.hpp>
#include <com/sun/star/container/XNameContainer.hpp>
#include <com/sun/star/io/TempFile.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/embed/XTransactedObject.hpp>
#include <OleHandler.hxx>
#include <memory>
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::embed;
namespace XSLT
{
Reference<XStream> SAL_CALL OleHandler::createTempFile() {
Reference<XStream> tempFile( TempFile::create(m_xContext), UNO_QUERY);
OSL_ASSERT(tempFile.is());
return tempFile;
}
void SAL_CALL OleHandler::ensureCreateRootStorage()
{
if (m_storage == nullptr || m_rootStream == nullptr)
{
m_rootStream = createTempFile();
Sequence<Any> args(1);
args[0] <<= m_rootStream->getInputStream();
Reference<XNameContainer> cont(
Reference<XMultiServiceFactory>(m_xContext->getServiceManager(), UNO_QUERY_THROW)
->createInstanceWithArguments("com.sun.star.embed.OLESimpleStorage", args), UNO_QUERY);
m_storage = cont;
}
}
void SAL_CALL OleHandler::initRootStorageFromBase64(const OString& content)
{
Sequence<sal_Int8> oleData;
::sax::Converter::decodeBase64(oleData, OStringToOUString(
content, RTL_TEXTENCODING_UTF8));
m_rootStream = createTempFile();
Reference<XOutputStream> xOutput = m_rootStream->getOutputStream();
xOutput->writeBytes(oleData);
xOutput->flush();
//Get the input stream and seek to begin
Reference<XSeekable> xSeek(m_rootStream->getInputStream(), UNO_QUERY);
xSeek->seek(0);
//create an com.sun.star.embed.OLESimpleStorage from the temp stream
Sequence<Any> args(1);
args[0] <<= xSeek;
Reference<XNameContainer> cont(
Reference<XMultiServiceFactory>(m_xContext->getServiceManager(), UNO_QUERY_THROW)
->createInstanceWithArguments("com.sun.star.embed.OLESimpleStorage", args), UNO_QUERY);
m_storage = cont;
}
OString SAL_CALL
OleHandler::encodeSubStorage(const OUString& streamName)
{
if (!m_storage->hasByName(streamName))
{
return "Not Found:";// + streamName;
}
;
Reference<XInputStream> subStream(*static_cast<Reference< XInterface > const *>(m_storage->getByName(streamName).getValue()), UNO_QUERY);
if (!subStream.is())
{
return "Not Found:";// + streamName;
}
//The first four byte are the length of the uncompressed data
Sequence<sal_Int8> pLength(4);
Reference<XSeekable> xSeek(subStream, UNO_QUERY);
xSeek->seek(0);
//Get the uncompressed length
int readbytes = subStream->readBytes(pLength, 4);
if (4 != readbytes)
{
return "Can not read the length.";
}
int oleLength = (pLength[0] << 0) + (pLength[1] << 8)
+ (pLength[2] << 16) + (pLength[3] << 24);
Sequence<sal_Int8> content(oleLength);
//Read all bytes. The compressed length should less then the uncompressed length
readbytes = subStream->readBytes(content, oleLength);
if (oleLength < readbytes)
{
return "oleLength";// +oleLength + readBytes;
}
// Decompress the bytes
std::unique_ptr< ::ZipUtils::Inflater> decompresser(new ::ZipUtils::Inflater(false));
decompresser->setInput(content);
Sequence<sal_Int8> result(oleLength);
decompresser->doInflateSegment(result, 0, oleLength);
decompresser->end();
decompresser.reset();
//return the base64 string of the uncompressed data
OUStringBuffer buf(oleLength);
::sax::Converter::encodeBase64(buf, result);
return OUStringToOString(buf.toString(), RTL_TEXTENCODING_UTF8);
}
void SAL_CALL
OleHandler::insertByName(const OUString& streamName, const OString& content)
{
if ( streamName == "oledata.mso" )
{
initRootStorageFromBase64(content);
}
else
{
ensureCreateRootStorage();
insertSubStorage(streamName, content);
}
}
const OString
SAL_CALL OleHandler::getByName(const OUString& streamName)
{
if ( streamName == "oledata.mso" )
{
//get the length and seek to 0
Reference<XSeekable> xSeek (m_rootStream, UNO_QUERY);
int oleLength = (int) xSeek->getLength();
xSeek->seek(0);
//read all bytes
Reference<XInputStream> xInput = m_rootStream->getInputStream();
Sequence<sal_Int8> oledata(oleLength);
xInput->readBytes(oledata, oleLength);
//return the base64 encoded string
OUStringBuffer buf(oleLength);
::sax::Converter::encodeBase64(buf, oledata);
return OUStringToOString(buf.toString(), RTL_TEXTENCODING_UTF8);
}
return encodeSubStorage(streamName);
}
void SAL_CALL
OleHandler::insertSubStorage(const OUString& streamName, const OString& content)
{
//decode the base64 string
Sequence<sal_Int8> oledata;
::sax::Converter::decodeBase64(oledata,
OStringToOUString(content, RTL_TEXTENCODING_ASCII_US));
//create a temp stream to write data to
Reference<XStream> subStream = createTempFile();
Reference<XInputStream> xInput = subStream->getInputStream();
Reference<XOutputStream> xOutput = subStream->getOutputStream();
//write the length to the temp stream
Sequence<sal_Int8> header(4);
header[0] = (sal_Int8) (oledata.getLength() >> 0) & 0xFF;
header[1] = (sal_Int8) (oledata.getLength() >> 8) & 0xFF;
header[2] = (sal_Int8) (oledata.getLength() >> 16) & 0xFF;
header[3] = (sal_Int8) (oledata.getLength() >> 24) & 0xFF;
xOutput->writeBytes(header);
// Compress the bytes
Sequence<sal_Int8> output(oledata.getLength());
std::unique_ptr< ::ZipUtils::Deflater> compresser(new ::ZipUtils::Deflater((sal_Int32) 3, false));
compresser->setInputSegment(oledata);
compresser->finish();
int compressedDataLength = compresser->doDeflateSegment(output, 0, oledata.getLength());
compresser.reset();
//realloc the data length
Sequence<sal_Int8> compressed(compressedDataLength);
for (int i = 0; i < compressedDataLength; i++) {
compressed[i] = output[i];
}
//write the compressed data to the temp stream
xOutput->writeBytes(compressed);
//seek to 0
Reference<XSeekable> xSeek(xInput, UNO_QUERY);
xSeek->seek(0);
//insert the temp stream as a sub stream and use an XTransactedObject to commit it immediately
Reference<XTransactedObject> xTransact(m_storage, UNO_QUERY);
Any entry;
entry <<= xInput;
m_storage->insertByName(streamName, entry);
xTransact->commit();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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