//C++ header - Open Scene Graph - Copyright (C) 1998-2002 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.

/* --------------------------------------------------------------------------
 *
 *    openscenegraph textLib / FTGL wrapper (http://homepages.paradise.net.nz/henryj/code/)
 *
 * --------------------------------------------------------------------------
 *    
 *    prog:    max rheiner;mrn@paus.ch
 *    date:    4/25/2001    (m/d/y)
 *
 * --------------------------------------------------------------------------
 *
 * --------------------------------------------------------------------------
 */


#ifndef OSGTEXT_ENCODEDTEXT
#define OSGTEXT_ENCODEDTEXT 1 

#include <osg/Referenced>

#include <vector>

#include <osgText/Export>

namespace osgText {

class OSGTEXT_EXPORT EncodedText : public osg::Referenced
{
    public:

        /**
         * Types of string encodings supported
         */
        enum Encoding
        {
            ENCODING_UNDEFINED,                 /// not using Unicode
            ENCODING_ASCII = ENCODING_UNDEFINED,/// unsigned char ASCII
            ENCODING_UTF8,                      /// 8-bit unicode transformation format
            ENCODING_UTF16,                     /// 16-bit signature
            ENCODING_UTF16_BE,                  /// 16-bit big-endian
            ENCODING_UTF16_LE,                  /// 16-bit little-endian
            ENCODING_UTF32,                     /// 32-bit signature
            ENCODING_UTF32_BE,                  /// 32-bit big-endian
            ENCODING_UTF32_LE,                  /// 32-bit little-endian
            ENCODING_SIGNATURE,                 /// detect encoding from signature
        };

        EncodedText();
        
        void setOverrideEncoding(Encoding encoding);
        Encoding getOverrideEncoding() const { return _overrideEncoding; }
        Encoding getEncoding() const { return _encoding; }

        void setText(const unsigned char* text, int length = -1);
        std::vector<int>::const_iterator getUnicodeText() const { return _unicodeText.begin(); } 

    protected:
    
        int getNextCharacter(const unsigned char*& charString) const;
        
        /// This method will extract any ZWNBSP signature at the start of the string
        Encoding findEncoding(const unsigned char*& charString) const;

        Encoding _encoding;
        Encoding _overrideEncoding;
        std::vector<int> _unicodeText; 
};

}

#endif // OSGTEXT_TEXT