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ColourIO.h

// ColourIO.h
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002 Iain Murray
//
/////////////////////////////////////////////////////////////////////////////


#ifndef __ColourIO_h__
#define __ColourIO_h__


#include "DasherTypes.h"

#include <string>
#include <map>
#include <vector>
#include <utility> // for std::pair
#include <stdio.h> // for C style file IO

namespace expat {
      #include "../Common/Expat/lib/expat.h"
}

namespace Dasher {class CColourIO;}
class Dasher::CColourIO
{
public:
      // This structure completely describes the characters used in alphabet
      struct ColourInfo
      {
            // Basic information
            std::string ColourID;
            bool Mutable; // If from user we may play. If from system defaults this is immutable. User should take a copy.
            
            // Complete description of the alphabet:
            std::vector< int > Reds;
            std::vector< int > Greens;
            std::vector< int > Blues;
      };
      
      CColourIO(std::string SystemLocation, std::string UserLocation, std::vector<std::string> Filenames);
      void GetColours(std::vector< std::string >* ColourList) const;
      const ColourInfo& GetInfo(const std::string& ColourID);
      void SetInfo(const ColourInfo& NewInfo);
      void Delete(const std::string& ColourID);
private:
      ColourInfo BlankInfo;
      std::string SystemLocation;
      std::string UserLocation;
      std::map<std::string, ColourInfo> Colours; // map short names (file names) to descriptions
      std::vector<std::string> Filenames;
      
      void Save(const std::string& ColourID);
      void CreateDefault(); // Give the user a default colour scheme rather than nothing if anything goes horribly wrong.
      
      // XML handling:
      /////////////////////////
      
      bool LoadMutable;
      void ParseFile(std::string Filename);
      
      // & to &amp;  < to &lt; and > to &gt;  and if (Attribute) ' to &apos; and " to &quot;
      void XML_Escape(std::string* Text, bool Attribute); 
      
      // Data gathered
      std::string CData; // Text gathered from when an elemnt starts to when it ends
      ColourInfo InputInfo;
      
      // Callback functions. These involve the normal dodgy casting to a pointer
      // to an instance to get a C++ class to work with a plain C library.
      static void XML_StartElement(void *userData, const expat::XML_Char *name, const expat::XML_Char **atts);
      static void XML_EndElement(void *userData, const expat::XML_Char *name);
      static void XML_CharacterData(void *userData, const expat::XML_Char *s, int len);
};


#endif /* #ifndef __ColourIO_h__ */

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