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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* This file is part of the libmspub 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 <memory>
#include <sstream>
#include <string.h>
#include <string>
#include <libmspub/libmspub.h>
#include "MSPUBCollector.h"
#include "MSPUBParser.h"
#include "MSPUBParser2k.h"
#include "MSPUBParser97.h"
#include "libmspub_utils.h"
namespace libmspub
{
namespace
{
enum MSPUBVersion
{
MSPUB_UNKNOWN_VERSION = 0,
MSPUB_2K,
MSPUB_2K2
};
MSPUBVersion getVersion(librevenge::RVNGInputStream *input)
{
try
{
if (!input->isStructured())
return MSPUB_UNKNOWN_VERSION;
std::unique_ptr<librevenge::RVNGInputStream> contentsStream(input->getSubStreamByName("Contents"));
if (!contentsStream)
return MSPUB_UNKNOWN_VERSION;
if (0xe8 != readU8(contentsStream.get()) || 0xac != readU8(contentsStream.get()))
return MSPUB_UNKNOWN_VERSION;
unsigned char magicVersionByte = readU8(contentsStream.get());
if (0x00 != readU8(contentsStream.get()))
return MSPUB_UNKNOWN_VERSION;
MSPUBVersion version = MSPUB_UNKNOWN_VERSION;
switch (magicVersionByte)
{
case 0x2C:
version = MSPUB_2K2;
break;
case 0x22:
version = MSPUB_2K;
break;
default:
break;
}
return version;
}
catch (...)
{
return MSPUB_UNKNOWN_VERSION;
}
}
} // anonymous namespace
/**
Analyzes the content of an input stream to see if it can be parsed
\param input The input stream
\return A value that indicates whether the content from the input
stream is a Microsoft Publisher Document that libmspub is able to parse
*/
PUBAPI bool MSPUBDocument::isSupported(librevenge::RVNGInputStream *input)
{
if (!input)
return false;
try
{
MSPUBVersion version = getVersion(input);
if (version == MSPUB_UNKNOWN_VERSION)
return false;
if (version == MSPUB_2K2)
{
std::unique_ptr<librevenge::RVNGInputStream> escherStream(input->getSubStreamByName("Escher/EscherStm"));
if (!escherStream)
return false;
std::unique_ptr<librevenge::RVNGInputStream> quillStream(input->getSubStreamByName("Quill/QuillSub/CONTENTS"));
if (!quillStream)
return false;
}
return true;
}
catch (...)
{
return false;
}
}
/**
Parses the input stream content. It will make callbacks to the functions provided by a
RVNGDrawingInterface class implementation when needed. This is often commonly called the
'main parsing routine'.
\param input The input stream
\param painter A MSPUBPainterInterface implementation
\return A value that indicates whether the parsing was successful
*/
PUBAPI bool MSPUBDocument::parse(librevenge::RVNGInputStream *input, librevenge::RVNGDrawingInterface *painter)
{
if (!input || !painter)
return false;
try
{
MSPUBCollector collector(painter);
input->seek(0, librevenge::RVNG_SEEK_SET);
std::unique_ptr<MSPUBParser> parser;
switch (getVersion(input))
{
case MSPUB_2K:
{
std::unique_ptr<librevenge::RVNGInputStream> quillStream(input->getSubStreamByName("Quill/QuillSub/CONTENTS"));
if (!quillStream)
parser.reset(new MSPUBParser97(input, &collector));
else
parser.reset(new MSPUBParser2k(input, &collector));
break;
}
case MSPUB_2K2:
{
parser.reset(new MSPUBParser(input, &collector));
break;
}
default:
return false;
}
if (parser)
{
return parser->parse();
}
return false;
}
catch (...)
{
return false;
}
}
}
/* vim:set shiftwidth=2 softtabstop=2 expandtab: */
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