How to use

SubstitutionTextReader

in

org.eclipse.jface.internal.text.html

@Override
public int read() throws IOException {
  int c= super.read();
  if (c != -1)
    ++ fCounter;
  return c;
}

/**
 * @see Reader#read()
 */
@Override
public int read() throws IOException {
  int c;
  do {
    c= nextChar();
    while (!fReadFromBuffer && c != -1) {
      String s= computeSubstitution(c);
      if (s == null)
        break;
      if (s.length() > 0)
        fBuffer.insert(0, s);
      c= nextChar();
    }
  } while (fSkipWhiteSpace && fWasWhiteSpace && (c == ' '));
  fWasWhiteSpace= (c == ' ' || c == '\r' || c == '\n');
  return c;
}

/**
 * @see Reader#read()
 */
@Override
public int read() throws IOException {
  int c;
  do {
    c= nextChar();
    while (!fReadFromBuffer && c != -1) {
      String s= computeSubstitution(c);
      if (s == null)
        break;
      if (s.length() > 0)
        fBuffer.insert(0, s);
      c= nextChar();
    }
  } while (fSkipWhiteSpace && fWasWhiteSpace && (c == ' '));
  fWasWhiteSpace= (c == ' ' || c == '\r' || c == '\n');
  return c;
}

@Override
public int read() throws IOException {
  int c= super.read();
  if (c != -1)
    ++ fCounter;
  return c;
}