Token id, iprop; // id is the current ID for the current line
/// <summary>
/// Create a new iCalendar parser.
/// </summary>
/// <param name="reader">The reader that contains the stream of text iCalendar</param>
/// <param name="_emitter">The emitter that will transform the iCalendar elements</param>
public Parser(StreamReader reader, IEmitter _emitter)
{
scanner = new Scanner(reader);
emitter = _emitter;
emitter.VParser = this;
errors = new ArrayList();
}
protected void reportFatalError(Scanner s, string msg)
{
s.ConsumeToEOL();
//Console.Error.WriteLine( "Found a fatal error on line " + linenumber + " : " + msg );
errors.Add(new ParserError(linenumber, msg));
}
/// <summary>
/// Parse the list of attributes - separated by ';'s. Attributes always are in the
/// form 'id=value' and indicate key/value pairs in the iCalendar attribute format.
/// </summary>
/// <returns></returns>
protected virtual bool parseAttributes(Scanner scan)
{
Token key = scan.GetNextToken(ScannerState.ParseKey);
if (key == null || key.TokenVal == TokenValue.Error)
{
// some kind of error - skip rest of line and continue
if (key == null)
reportError(scanner, " expecting ID - found nothing.");
else
reportError(scanner, " expecting ID - found " + key.TokenText);
return false;
}
Token sep = scan.GetNextToken(ScannerState.ParseSimple);
if (sep == null || sep.TokenVal == TokenValue.Error || sep.TokenVal != TokenValue.Equals)
{
// some kind of error - skip rest of line and continue
if (sep == null)
reportError(scanner, " expecting = - found nothing.");
else
reportError(scanner, " expecting = - found " + sep.TokenText);
return false;
}
Token val = scan.GetNextToken(ScannerState.ParseParms);
if (val == null || val.TokenVal == TokenValue.Error)
{
// some kind of error - skip rest of line and continue
if (val == null)
reportError(scanner, " expecting parameter - found nothing.");
else
reportError(scanner, " expecting parameter - found " + val.TokenText);
return false;
}
if (key.TokenVal == TokenValue.Tvalue && scanner == scan)
{
// it's an IPROP - don't ask...
iprop = val;
}
else
{
attributes.Push(new DictionaryEntry(key, val));
}
// do a recursive case to identify all of the attributes
sep = scan.GetNextToken(ScannerState.ParseSimple);
if (sep == null || sep.TokenVal == TokenValue.Error)
{
// if we are parsing an rrule - this is the line termination
if (scanner != scan)
{
return true;
}
// some kind of error - skip rest of line and continue
if (sep == null)
reportError(scanner, " expecting : or ; - found nothing.");
else
reportError(scanner, " expecting : or ; - found " + sep.TokenText);
return false;
}
if (sep.TokenVal == TokenValue.Colon)
{
// termination case
return true;
}
else if (sep.TokenVal == TokenValue.SemiColon)
{
// recursive case
return parseAttributes(scan);
}
return true;
}
internal Enumerator(Scanner _scanner)
{
scanner = _scanner;
current = null;
}