glyph_context.h

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// Based on "Design Patterns: Elements of Reusable Object-Oriented Software"
// book by Erich Gamma, John Vlissides, Ralph Johnson, and Richard Helm 
//
// Created by Bartosz Rachwal. The National Institute of Advanced Industrial Science and Technology, Japan.

#ifndef STRUCTURAL_FLYWEIGHT_GLYPH_CONTEXT_H_
#define STRUCTURAL_FLYWEIGHT_GLYPH_CONTEXT_H_

#include "btree.h"

namespace structural
{
namespace flyweight
{
class GlyphContext
{
    public:
    GlyphContext();
    virtual ~GlyphContext();

    virtual void First();

    virtual void Next(int step);
    virtual void Next();

    virtual bool IsDone();

    virtual void Insert(int quantity);
    virtual void Insert();

    virtual Font *GetFont();

    virtual void SetFont(Font*);
    virtual void SetFont(Font*, int span);

    private:
    int index_;
    BTree* fonts_;
};
}
}

#endif