private bool HandleKeyword()
{
var start = _cs.Position;
if (MoveToKeywordEnd())
{
AddToken(RdTokenType.Keyword, start, _cs.Position - start);
SkipWhitespace();
if (_cs.CurrentChar == '{' || _cs.CurrentChar == '[')
{
var keyword = _cs.Text.GetText(TextRange.FromBounds(start, _cs.Position)).Trim();
var contentType = RdBlockContentType.GetBlockContentType(keyword);
if (_currentContentType != contentType)
{
_currentContentType = contentType;
Debug.Assert(_tokens[_tokens.Count - 1].TokenType == RdTokenType.Keyword);
_tokens[_tokens.Count - 1].ContentTypeChange = true;
}
// Handle argument sequence like \latex[0]{foo} or \item{}{}
while (_cs.CurrentChar == '{' || _cs.CurrentChar == '[')
{
HandleKeywordArguments(contentType);
}
}
return(true);
}
return(false);
}
private void HandleKeywordArguments(BlockContentType contentType)
{
// Content type table can be found in
// https://developer.r-project.org/parseRd.pdf
switch (contentType)
{
case BlockContentType.R:
HandleRContent();
break;
case BlockContentType.Verbatim:
HandleVerbatimContent();
break;
default:
HandleLatexContent(block: true);
break;
}
}
public override IReadOnlyTextRangeCollection <RdToken> Tokenize(ITextProvider textProvider, int start, int length, bool excludePartialTokens)
{
_currentContentType = BlockContentType.Latex;
return(base.Tokenize(textProvider, start, length, excludePartialTokens));
}
