tbuffer.h

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//-----------------------------------------------------------
/*
File Name:	TBuffer.h
Comments:	This file contains the definition of the 
			text_buffer type.
*/
//-----------------------------------------------------------

#ifndef TBUFFER_H
#define TBUFFER_H


//-----------------------------------------------------------
//Include Files

#include "Tstring.h"
#include "MiscType.h"

//End Include Files
//-----------------------------------------------------------



//-----------------------------------------------------------
//Enumerated Types

typedef enum
{
	TBE_NO_ERROR = 0,
	TBE_OUT_OF_MEMORY,
	TBE_CANT_ALLOCATE_BUFFER,
	TBE_CANT_OPEN_FILE,
	TBE_CANT_WRITE_TO_FILE
}text_buffer_error;

//End Enumerated Types
//------------------------------------------------------------------




//----------------------------------------------------------------------------------
//Types

typedef struct
{
	text_string *allRows;
	int totalRows;
	int topLine;
	boolean isDirty;
	text_buffer_error errorStatus;
}text_buffer;

//End Types
//-------------------------------------------------------------




//-----------------------------------------------------------------
//Prototypes.

void TextBufferInitialize(text_buffer *tBuffer);

void TextBufferSetRow(text_buffer *tBuffer,
						int rowNumber,
						text_string textString);

void TextBufferGetRow(const text_buffer * const tBuffer,
						int rowNumber,
						text_string *textString);

void TextBufferScrollUp(text_buffer *tBuffer,
						int linesToScroll);

void TextBufferScrollDown(text_buffer *tBuffer,
							int linesToScroll,
							int displayAreaHeight);
							
void TextBufferScrollToBeginning(text_buffer *textBuffer);

void TextBufferScrollToEnd(text_buffer *textBuffer);

int TextBufferGetTopLine(const text_buffer * const tBuffer);

void TextBufferSaveToFile(text_buffer *textBuffer,
							text_string fileName);
							
void TextBufferLoadFromFile(text_buffer *textBuffer,
								text_string fileName);
								
int TextBufferGetBufferLength(const text_buffer * const tBuffer);

text_buffer_error TextBufferGetError(text_buffer *tBuffer);

void TextBufferClearError(text_buffer *tBuffer);

void TextBufferFree(text_buffer *tBuffer);

//End Prototypes.
//---------------------------------------------------------------

#endif

//End TBuffer.h
//----------------------------------------------------------------------