/*
 * Copyright 2013, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef TERMVIEW_HIGHLIGHT_H
#define TERMVIEW_HIGHLIGHT_H


#include <GraphicsDefs.h>

#include "TermPos.h"


class TermViewHighlighter {
public:
        virtual                                         ~TermViewHighlighter();

        virtual rgb_color                       ForegroundColor() = 0;
        virtual rgb_color                       BackgroundColor() = 0;
        virtual uint32                          AdjustTextAttributes(uint32 attributes);
};


class TermViewHighlight {
public:
        TermViewHighlight()
                :
                fHighlighter(NULL),
                fStart(-1, -1),
                fEnd(-1, -1)
        {
        }

        TermViewHighlighter* Highlighter() const
        {
                return fHighlighter;
        }

        void SetHighlighter(TermViewHighlighter* highligher)
        {
                fHighlighter = highligher;
        }

        const TermPos& Start() const
        {
                return fStart;
        }

        const TermPos& End() const
        {
                return fEnd;
        }

        bool IsEmpty() const
        {
                return fStart == fEnd;
        }

        bool RangeContains(const TermPos& pos) const
        {
                return pos >= fStart && pos < fEnd;
        }

        void SetRange(const TermPos& start, const TermPos& end)
        {
                fStart = start;
                fEnd = end;
        }

        void ScrollRange(int32 byLines)
        {
                fStart.y -= byLines;
                fEnd.y -= byLines;
        }

private:
        TermViewHighlighter*    fHighlighter;
        TermPos                                 fStart;
        TermPos                                 fEnd;
};


#endif // TERMVIEW_HIGHLIGHT_H