/****************************************************************************
**
** Copyright (C) 2003-2006 Frank Hemer <frank@hemer.org>,
**                         Tilo Riemer <riemer@crossvc.com>
**
**
**----------------------------------------------------------------------------
**
**----------------------------------------------------------------------------
**
** CrossVC is available under two different licenses:
**
** If CrossVC is linked against the GPLed version of Qt 
** CrossVC is released under the terms of GPL also.
**
** If CrossVC is linked against a nonGPLed version of Qt 
** CrossVC is released under the terms of the 
** CrossVC License for non-Unix platforms (CLNU)
**
**
** CrossVC License for non-Unix platforms (CLNU):
**
** Redistribution and use in binary form, without modification, 
** are permitted provided that the following conditions are met:
**
** 1. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 2. It is not permitted to distribute the binary package under a name
**    different than CrossVC.
** 3. The name of the authors may not be used to endorse or promote
**    products derived from this software without specific prior written
**    permission.
** 4. The source code is the creative property of the authors.
**    Extensions and development under the terms of the Gnu Public License
**    are limited to the Unix platform. Any distribution or compilation of 
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**
** CrossVC License for Unix platforms:
**
** This program is free software; you can redistribute it and/or modify 
** it under the terms of the GNU General Public License as published by 
** the Free Software Foundation, version 2 of the License.
** This program is distributed in 
** the hope that it will be useful, but WITHOUT ANY WARRANTY; without 
** even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
** PARTICULAR PURPOSE.
**
** See the GNU General Public License version 2 for more details.
**
** You should have received a copy of the GNU General Public License
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*****************************************************************************/

#include "CvsBuffer.h"

//only needed for Log stuff --> skip it if we are sure all works fine
#include "globals.h"
#include "LinCVSLog.h"

#define LFOFFSET 1

CvsBuffer::CvsBuffer() 
   : line(0)
{
  clear();
}

CvsBuffer::~CvsBuffer() {
  delete line;
  line = NULL;
}

void CvsBuffer::clear() {

  buff = "";
  delete line;

  line = new std::vector<unsigned int>;
  line->push_back(0);
  index = 0;
  linesCount = 0;
  m_bClippedLine = FALSE;
}

void CvsBuffer::append( const QString& s) {

  int pos = s.find('\n');

  if (m_bClippedLine) {
    line->pop_back();
    linesCount--;
    m_bClippedLine = FALSE;
  }

  while (pos>-1) {
    line->push_back(index + (unsigned int)pos + 1);
    linesCount++;
    pos = s.find('\n',pos+1);
  }

  if (s.at(s.length()-1) != '\n') {//string contains a line without a newline at the end
    m_bClippedLine = TRUE;
    line->push_back(index + (unsigned int)s.length());
    linesCount++;   //we increase here the number of lines but not if we append the next string for the first line
  }
  buff.append(s);
  index += s.length();
}

int CvsBuffer::numLines() const {
  return linesCount;
}

QString CvsBuffer::textLine(int l) const {

  if ( (l < 0) || (l >= linesCount) ) return QString::null;

  unsigned int from = (*line)[l];
  unsigned int to = (*line)[l+1];
  if ( (to == index) && m_bClippedLine) to++;
  return buff.mid(from,to-from-LFOFFSET);
}

QString CvsBuffer::readAll() {
  return buff;
}