#include "stdafx.h"
#include "..\\Include\\CEditOutputStream.h"
#include <algorithm>

using namespace kaBasicClasses;
using namespace std;

CEditOutputStreamBuffer::CEditOutputStreamBuffer( CEdit* p )
	: theBufferSize(1000)
{
		theBuffer.reserve(theBufferSize+3);
		setp( theBuffer.begin(), theBuffer.begin()+(theBufferSize-1));
		theEditor=p;
}


CEditOutputStreamBuffer::~CEditOutputStreamBuffer()
{
	flush();
}


void CEditOutputStreamBuffer::insertText( charType* string )
{
	setCursorAtPosition(getCursorPosition()); //remove selection if any.
	theEditor->ReplaceSel(string);
}


int CEditOutputStreamBuffer::flush()
{
		int num=pptr()-pbase();
		//I would like to say
		//	*pptr()='\0';
		//	insertText(&*theBuffer.begin());
		//However, in the buffer of the CEdit, the end of line is represented
		//by a couple of characters: /r/n: ascii(13) followed by ascii(10). So, the end
		//of line has to be handled here.
		bufferType::iterator startOfLine=theBuffer.begin();
		bufferType::iterator endOfLine=startOfLine;
		while( startOfLine<pptr() )
		{
			endOfLine=find(startOfLine,pptr(),charType('\n'));
			charType ch1=*endOfLine;
			charType ch2=*(endOfLine+1);
			charType ch3=*(endOfLine+2);
			if( endOfLine!=pptr() ) //the '\n' was found
			{
				*endOfLine=charType(13);
				*(endOfLine+1)=charType(10);
				*(endOfLine+2)=charType(0); //insertText requires a null terminated array of characters
				insertText(&*startOfLine);
				*endOfLine=ch1;
				*(endOfLine+1)=ch2;
				*(endOfLine+2)=ch3;
			}
			else //'\n' was not found: the regular string
			{
				*endOfLine=charType(0);
				insertText(&*startOfLine);
				*endOfLine=ch1;
			}
			startOfLine=endOfLine+1;
			if( startOfLine<pptr() && *startOfLine==charType(13) )
				startOfLine++;
		}
		pbump(-num);
		return num;
}


CEditOutputStreamBuffer::int_type CEditOutputStreamBuffer::overflow( int_type c )
{
		if( c!=EOF )
		{
			*pptr()=c;
			pbump(1);
		}
		flush();
		return c;
}

int CEditOutputStreamBuffer::getCursorPosition()
{
	int n1, n2;
	theEditor->GetSel(n1,n2);
	return n2;
}


int CEditOutputStreamBuffer::getMaximalCursorPosition()
{
	return theEditor->GetWindowTextLength();
}


void CEditOutputStreamBuffer::setCursorAtPosition( int pos )
{
	theEditor->SetSel(pos,pos);
}


void CEditOutputStreamBuffer::setCursorAtBeginning()
{
	theEditor->SetSel(0,0);
}


void CEditOutputStreamBuffer::setCursorAtEnd()
{
	int n=getMaximalCursorPosition();
	theEditor->SetSel(n,n);
}


void CEditOutputStreamBuffer::moveCursorBy( int pos )
{
	setCursorAtPosition(getCursorPosition()+pos);
}