/* -*- Mode: C++; c-default-style: "k&r"; indent-tabs-mode: nil; tab-width: 2; c-basic-offset: 2 -*- */

/* libstaroffice
* Version: MPL 2.0 / LGPLv2+
*
* The contents of this file are subject to the Mozilla Public License Version
* 2.0 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* Copyright (C) 2002 William Lachance (wrlach@gmail.com)
* Copyright (C) 2002,2004 Marc Maurer (uwog@uwog.net)
* Copyright (C) 2004-2006 Fridrich Strba (fridrich.strba@bluewin.ch)
* Copyright (C) 2006, 2007 Andrew Ziem
* Copyright (C) 2011, 2012 Alonso Laurent (alonso@loria.fr)
*
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
* in which case the provisions of the LGPLv2+ are applicable
* instead of those above.
*/

#include <cstring>
#include <iomanip>
#include <iostream>
#include <limits>
#include <sstream>

#include <librevenge/librevenge.h>

#include "STOFFOLEParser.hxx"
#include "STOFFTextListener.hxx"

#include "StarFileManager.hxx"
#include "StarObjectText.hxx"
#include "StarZone.hxx"

#include "SDWParser.hxx"

/** Internal: the structures of a SDWParser */
namespace SDWParserInternal
{
////////////////////////////////////////
//! Internal: the state of a SDWParser
struct State {
  //! constructor
  State() : m_actPage(0), m_numPages(0), m_mainText()
  {
  }

  int m_actPage /** the actual page */, m_numPages /** the number of page of the final document */;
  //! the main graphic document
  shared_ptr<StarObjectText> m_mainText;
};

}

////////////////////////////////////////////////////////////
// constructor/destructor, ...
////////////////////////////////////////////////////////////
SDWParser::SDWParser(STOFFInputStreamPtr input, STOFFHeader *header) :
  STOFFTextParser(input, header), m_password(0), m_oleParser(), m_state(new SDWParserInternal::State)
{
}

SDWParser::~SDWParser()
{
}

////////////////////////////////////////////////////////////
// the parser
////////////////////////////////////////////////////////////
void SDWParser::parse(librevenge::RVNGTextInterface *docInterface)
{
  if (!getInput().get() || !checkHeader(0L))  throw(libstoff::ParseException());
  bool ok = true;
  try {
    // create the asciiFile
    checkHeader(0L);
    ok = createZones();
    if (ok) {
      createDocument(docInterface);
      if (m_state->m_mainText)
        m_state->m_mainText->sendPages(getTextListener());
#ifdef DEBUG
      StarFileManager::checkUnparsed(getInput(), m_oleParser, m_password);
#endif
    }
    ascii().reset();
  }
  catch (...) {
    STOFF_DEBUG_MSG(("SDWParser::parse: exception catched when parsing\n"));
    ok = false;
  }

  resetTextListener();
  if (!ok) throw(libstoff::ParseException());
}


bool SDWParser::createZones()
{
  m_oleParser.reset(new STOFFOLEParser);
  m_oleParser->parse(getInput());
  shared_ptr<STOFFOLEParser::OleDirectory> mainOle=m_oleParser->getDirectory("/");
  if (!mainOle) {
    STOFF_DEBUG_MSG(("SDWParser::parse: can not find the main ole\n"));
    return false;
  }
  mainOle->m_parsed=true;
  StarObject mainObject(m_password, m_oleParser, mainOle);
  if (mainObject.getDocumentKind()!=STOFFDocument::STOFF_K_TEXT) {
    STOFF_DEBUG_MSG(("SDWParser::createZones: can not find the main graphic\n"));
    return false;
  }
  m_state->m_mainText.reset(new StarObjectText(mainObject, false));
  return m_state->m_mainText->parse();
}

////////////////////////////////////////////////////////////
// create the document
////////////////////////////////////////////////////////////
void SDWParser::createDocument(librevenge::RVNGTextInterface *documentInterface)
{
  if (!documentInterface) return;
  std::vector<STOFFPageSpan> pageList;
  if (!m_state->m_mainText || !m_state->m_mainText->updatePageSpans(pageList, m_state->m_numPages)) {
    STOFFPageSpan ps(getPageSpan());
    ps.m_pageSpan=1;
    pageList.push_back(ps);
    m_state->m_numPages = 1;
  }
  STOFFTextListenerPtr listen(new STOFFTextListener(getParserState()->m_listManager, pageList, documentInterface));
  setTextListener(listen);
  if (m_state->m_mainText)
    listen->setDocumentMetaData(m_state->m_mainText->getMetaData());

  listen->startDocument();
}


////////////////////////////////////////////////////////////
//
// Intermediate level
//
////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
//
// Low level
//
////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
// read the header
////////////////////////////////////////////////////////////
bool SDWParser::checkHeader(STOFFHeader *header, bool /*strict*/)
{
  *m_state = SDWParserInternal::State();

  STOFFInputStreamPtr input = getInput();
  if (!input || !input->hasDataFork() || !input->isStructured())
    return false;
  STOFFInputStreamPtr textInput=input->getSubStreamByName("StarWriterDocument");
  if (!textInput)
    return false;
  if (header) {
    header->reset(1);
    textInput->seek(0, librevenge::RVNG_SEEK_SET);
    if (textInput->readULong(2)==0x5357)
      textInput->setReadInverted(!textInput->readInverted());
    textInput->seek(10, librevenge::RVNG_SEEK_SET);
    header->setEncrypted((textInput->readULong(2)&8)!=0);
  }
  return true;
}


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