
#include<colorer/viewer/TextLinesStore.h>

void TextLinesStore::replaceTabs(int lno){
  String *od = lines.elementAt(lno)->replace(DString("\t"), DString("    "));
  delete lines.elementAt(lno);
  lines.setElementAt(od, lno);
};

TextLinesStore::TextLinesStore(){
  fileName = null;
};
TextLinesStore::~TextLinesStore(){
  freeFile();
};
void TextLinesStore::freeFile(){
  delete fileName;
  fileName = null;
  for(int i = 0; i < lines.size(); i++)
    delete lines.elementAt(i);
  lines.setSize(0);
};

void TextLinesStore::loadFile(const String *fileName, const String *inputEncoding, bool tab2spaces)
{
  if (this->fileName != null){
    freeFile();
  }
  if (fileName == null) throw Exception(StringBuffer("can't find 'null' file"));
  this->fileName = new SString(fileName);
  InputSource *is = InputSource::newInstance(fileName);

  const byte *data;
  try{
    data = is->openStream();
  }catch (InputSourceException &e){
    delete is;
    throw e;
  }

  int len = is->length();

  int ei = inputEncoding == null ? -1 : Encodings::getEncodingIndex(inputEncoding->getChars());
  DString file(data, len, ei);
  int length = file.length();
  lines.ensureCapacity(length/30); // estimate number of lines

  int i = 0;
  int filepos = 0;
  int prevpos = 0;
  if (length && file[0] == 0xFEFF) filepos = prevpos = 1;
  while(filepos < length+1){
    if (filepos == length || file[filepos] == '\r' || file[filepos] == '\n'){
      lines.addElement(new SString(&file, prevpos, filepos-prevpos));
      if (tab2spaces) replaceTabs(lines.size()-1);
      if (filepos+1 < length && file[filepos] == '\r' && file[filepos+1] == '\n')
        filepos++;
      else if (filepos+1 < length && file[filepos] == '\n' && file[filepos+1] == '\r')
        filepos++;
      prevpos = filepos+1;
      i++;
    };
    filepos++;
  };
  delete is;
};
const String *TextLinesStore::getFileName(){
  return fileName;
};

String *TextLinesStore::getLine(int lno){
  if (lines.size() <= lno) return null;
  return lines.elementAt(lno);
};
int TextLinesStore::getLineCount(){
  return lines.size();
};
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Colorer Library.
 *
 * The Initial Developer of the Original Code is
 * Cail Lomecb <cail@nm.ru>.
 * Portions created by the Initial Developer are Copyright (C) 1999-2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
