private MediaFeature CreateFeature(ref Token token)
{
if (token.Type == TokenType.Ident)
{
var start = token.Position;
var val = TokenValue.Empty;
var feature = _parser.Options.AllowInvalidConstraints
? new UnknownMediaFeature(token.Data)
: MediaFeatureFactory.Instance.Create(token.Data);
token = NextToken();
if (token.Type == TokenType.Colon)
{
var value = Pool.NewValueBuilder();
token = NextToken();
while (token.IsNot(TokenType.RoundBracketClose, TokenType.EndOfFile) || !value.IsReady)
{
value.Apply(token);
token = NextToken();
}
val = value.ToPool();
}
else if (token.Type == TokenType.EndOfFile)
{
return(null);
}
if ((feature != null) && feature.TrySetValue(val))
{
var node = feature as StylesheetNode;
if (node != null)
{
var end = token.Position.Shift(-1);
node.StylesheetText = CreateView(start, end);
}
return(feature);
}
}
else
{
JumpToArgEnd(ref token);
}
return(null);
}
private TokenValue CreateValue(TokenType closing, ref Token token, out bool important)
{
var value = Pool.NewValueBuilder();
_lexer.IsInValue = true;
token = NextToken();
var start = token.Position;
while (token.IsNot(TokenType.EndOfFile, TokenType.Semicolon, closing))
{
value.Apply(token);
token = NextToken();
}
important = value.IsImportant;
_lexer.IsInValue = false;
var valueIsValid = value.IsValid;
var result = value.ToPool();
//var node = result as StylesheetNode;
var node = (StylesheetNode)result;
if (node != null)
{
var end = token.Position.Shift(-1);
node.StylesheetText = CreateView(start, end);
}
if (!valueIsValid && !_parser.Options.AllowInvalidValues)
{
RaiseErrorOccurred(ParseError.InvalidValue, start);
result = null;
}
return(result);
}
