/*
 * Copyright (C) 2007-2023 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_TEXT_BUILDER_H
#define BU_TEXT_BUILDER_H

#include <stdint.h>
#include "bu/sharedcore.h"
#include "bu/text.h"

namespace Bu
{
    class TextBuilder;
    
    /** @cond DEVEL */
    class TextBuilderCore
    {
    friend class TextBuilder;
    friend class SharedCore<TextBuilder, TextBuilderCore>;
    private:
        class Chunk
        {
        public:
            Chunk( const CodePoint *pSrc, int32_t iLength );
            ~Chunk();

            void append( const CodePoint *&pSrc, int32_t &iLength );

            Chunk *split( int32_t iIndex );

            int32_t iLength;
            CodePoint *pData;
            Chunk *pNext;
        };

        TextBuilderCore();
        TextBuilderCore( const TextBuilderCore &rSrc );
        virtual ~TextBuilderCore();

        void clear();
        void append( const CodePoint *pSrc, int32_t iLength );
        void prepend( const CodePoint *pSrc, int32_t iLength );
        void insert( int32_t iBefore, const CodePoint *pSrc, int32_t iLength );
        void set( const CodePoint *pSrc, int32_t iLength );
        void copyTo( void *pDestRaw, int32_t iLength );
        CodePoint getAt( int32_t iIndex ) const;

        Chunk *pFirst;
        Chunk *pLast;
        int32_t iLength;
    };

    class TextBuilder : public Bu::SharedCore<TextBuilder, TextBuilderCore>
    {
    protected:
        using SharedCore<TextBuilder, TextBuilderCore>::core;
        using SharedCore<TextBuilder, TextBuilderCore>::_hardCopy;

    public:
        TextBuilder();
        TextBuilder( const Text &rSrc );
        TextBuilder( const TextBuilder &rSrc );
        virtual ~TextBuilder();

        void set( const Text &rSrc );
        void append( const Text &rSrc );
        void append( const CodePoint *pSrc, int32_t iLength );
        void prepend( const Text &rSrc );
        void insert( int32_t iBefore, const Text &rSrc );
        void clear();

        int32_t getSize() const;
        Text getText() const;
        void copyTo( void *pDestRaw, int32_t iDestSize ) const;
        CodePoint operator[]( int32_t iIndex ) const;

        TextBuilder &operator=( const Text &rSrc );
        TextBuilder &operator==( const Text &rSrc );
    };
}

#endif