/*
 * Copyright 2001-2006, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Marc Flerackers (mflerackers@androme.be)
 */
#ifndef __LINE_BUFFER_H
#define __LINE_BUFFER_H


#include <SupportDefs.h>
#include <TextView.h>

#include "TextViewSupportBuffer.h"

struct STELine {
        long            offset;         // offset of first character of line
        float           origin;         // pixel position of top of line
        float           ascent;         // maximum ascent for line
        float           width;          // cached width of line in pixels
};


class BTextView::LineBuffer : public _BTextViewSupportBuffer_<STELine> {

public:
                                                                LineBuffer();
        virtual                                         ~LineBuffer();

                        void                            InsertLine(STELine* inLine, int32 index);
                        void                            RemoveLines(int32 index, int32 count = 1);
                        void                            RemoveLineRange(int32 fromOffset,
                                                                        int32 toOffset);

                        int32                           OffsetToLine(int32 offset) const;
                        int32                           PixelToLine(float pixel) const;

                        void                            BumpOrigin(float delta, int32 index);
                        void                            BumpOffset(int32 delta, int32 index);

                        int32                           NumLines() const;
                        float                           MaxWidth() const;
                        STELine*                        operator[](int32 index) const;
};


inline int32
BTextView::LineBuffer::NumLines() const
{
        return fItemCount - 1;
}


inline STELine *
BTextView::LineBuffer::operator[](int32 index) const
{
        return &fBuffer[index];
}


#endif  // __LINE_BUFFER_H