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

#include <SupportDefs.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;		// not used for now, but could be
};


// _BLineBuffer_ class ---------------------------------------------------------
class _BLineBuffer_ : public _BTextViewSupportBuffer_<STELine> {

public:
						_BLineBuffer_();
virtual					~_BLineBuffer_();

		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);

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


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


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