libogre/include/sirikata/ogre/resourceManager/ReplacingDataStream.hpp

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/*  Meru
 *  ReplacingDataStream.hpp
 *
 *  Copyright (c) 2009, Stanford University
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name of Sirikata nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _REPLACING_DATA_STREAM_HPP_
#define _REPLACING_DATA_STREAM_HPP_

#include <sirikata/ogre/Platform.hpp>
#include <sirikata/ogre/OgreHeaders.hpp>
#include <OgreDataStream.h>
#ifndef STANDALONE
#include <OgreCommon.h>
#endif

#include <sirikata/core/transfer/URI.hpp>

namespace Sirikata {
namespace Graphics {

class SIRIKATA_OGRE_EXPORT ReplacingDataStream : public Ogre::DataStream{
protected:
  static void find_lexeme (const Ogre::String&input,
                                                Ogre::String::size_type &where_lexeme_start,
                                                Ogre::String::size_type &return_lexeme_end);
  Ogre::String dataAsString;
  Ogre::DataStreamPtr file;
  Ogre::MemoryDataStreamPtr helper;
  std::vector<Ogre::String> provides;//materials and programs this provides
  std::vector<Ogre::String> depends_on;//materials and programs this depends on
  const Ogre::NameValuePairList*mTextureAliases;
    Transfer::URI mSourceURI;
  void verifyData()const;
  virtual void replace_reference(Ogre::String&retval, const Ogre::String&input, Ogre::String::size_type&pwhere,Ogre::String::const_iterator second_input, const Ogre::String&filename);
  virtual void replace_texture_reference(Ogre::String&retval, const Ogre::String&input, Ogre::String::size_type&pwhere,Ogre::String::const_iterator second_input, bool texture_instead_of_source,const Ogre::String&filename);
  virtual Ogre::String full_replace_lexeme(const Ogre::String &input,
                                   Ogre::String::size_type where_lexeme_start,
                                   Ogre::String::size_type &return_lexeme_end,
                                   const Ogre::String &filename);
  virtual Ogre::String replace_lexeme(const Ogre::String &input,
                              Ogre::String::size_type where_lexeme_start,
                              Ogre::String::size_type &return_lexeme_end,
                              const Ogre::String &filename);


protected:
  virtual Ogre::String replaceData(Ogre::String);
public:
  void preprocessData(std::vector<Ogre::String>&provides,std::vector<Ogre::String>&depends_on);
  ReplacingDataStream(Ogre::DataStreamPtr&input,const Ogre::String &destination, const Ogre::NameValuePairList*textureAliases);
  virtual ~ReplacingDataStream();

  virtual size_t read(void* buf, size_t count);
  virtual Ogre::String getAsString(void);
  virtual void skip(long count);

  virtual void seek( size_t pos );
  virtual size_t tell(void) const;
  virtual bool eof(void) const;
  virtual void close(void);
};

} // namespace Graphics
} // namespace Sirikata

#endif //_REPLACING_DATA_STREAM_HPP_