MWAWPictData.hxx

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

/* libmwaw
* 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.
*/

/* This header contains code specific to a pict which can be stored in a
 *      librevenge::RVNGBinaryData, this includes :
 *         - the mac Pict format (in MWAWPictMac)
 *         - some old data names db3
 *         - some potential short data file
 */

#ifndef MWAW_PICT_DATA
#  define MWAW_PICT_DATA

#  include <assert.h>
#  include <ostream>

#  include <librevenge/librevenge.h>

#  include "libmwaw_internal.hxx"
#  include "MWAWPict.hxx"

class MWAWPictData : public MWAWPict
{
public:
  enum SubType { PictMac, DB3, Unknown };
  virtual Type getType() const
  {
    return MWAWPict::PictData;
  }
  virtual SubType getSubType() const = 0;

  virtual bool getBinary(librevenge::RVNGBinaryData &res, std::string &s) const
  {
    if (!valid() || isEmpty()) return false;

    s = "image/pict";
    createFileData(m_data, res);
    return true;
  }

  virtual bool sure() const
  {
    return getSubType() != Unknown;
  }

  virtual bool valid() const
  {
    return false;
  }

  bool isEmpty() const
  {
    return m_empty;
  }

  static ReadResult check(MWAWInputStreamPtr input, int size, MWAWBox2f &box)
  {
    return checkOrGet(input, size, box, 0L);
  }

  static MWAWPictData *get(MWAWInputStreamPtr input, int size)
  {
    MWAWPictData *res = 0L;
    MWAWBox2f box;
    if (checkOrGet(input, size, box, &res) == MWAW_R_BAD) return 0L;
    if (res) { // if the bdbox is good, we set it
      MWAWVec2f sz = box.size();
      if (sz.x()>0 && sz.y()>0) res->setBdBox(box);
    }
    return res;
  }

  virtual int cmp(MWAWPict const &a) const
  {
    int diff = MWAWPict::cmp(a);
    if (diff) return diff;
    MWAWPictData const &aPict = static_cast<MWAWPictData const &>(a);

    diff = (int) m_empty - (int) aPict.m_empty;
    if (diff) return (diff < 0) ? -1 : 1;
    else if (m_empty) // both empty
      return 0;
    // the type
    diff = getSubType() - aPict.getSubType();
    if (diff) return (diff < 0) ? -1 : 1;

    if (m_data.size() < aPict.m_data.size())
      return 1;
    if (m_data.size() > aPict.m_data.size())
      return -1;
    unsigned char const *data=m_data.getDataBuffer();
    unsigned char const *aData=m_data.getDataBuffer();
    if (!data || !aData) return 0; // must only appear if the two buffers are empty
    for (unsigned long c=0; c < m_data.size(); c++, data++, aData++) {
      if (*data < *aData) return -1;
      if (*data > *aData) return 1;
    }
    return 0;
  }

protected:
  static bool createFileData(librevenge::RVNGBinaryData const &orig, librevenge::RVNGBinaryData &result);

  MWAWPictData(): m_data(), m_empty(false) { }
  MWAWPictData(MWAWBox2f &): m_data(), m_empty(false) { }

  static ReadResult checkOrGet(MWAWInputStreamPtr input, int size,
                               MWAWBox2f &box, MWAWPictData **result = 0L);

  librevenge::RVNGBinaryData m_data;

  bool m_empty;
};

class MWAWPictDB3 : public MWAWPictData
{
public:
  virtual SubType getSubType() const
  {
    return DB3;
  }

  virtual bool valid() const
  {
    return m_data.size() != 0;
  }

  virtual int cmp(MWAWPict const &a) const
  {
    return MWAWPictData::cmp(a);
  }

protected:

  MWAWPictDB3()
  {
    m_empty = false;
  }

  friend class MWAWPictData;
  static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWPictData **result = 0L);
};

class MWAWPictDUnknown : public MWAWPictData
{
public:
  virtual SubType getSubType() const
  {
    return Unknown;
  }

  virtual bool valid() const
  {
    return m_data.size() != 0;
  }

  virtual int cmp(MWAWPict const &a) const
  {
    return MWAWPictData::cmp(a);
  }

protected:

  MWAWPictDUnknown()
  {
    m_empty = false;
  }

  friend class MWAWPictData;

  static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWPictData **result = 0L);
};

#endif
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