public Span Parse(string paragraph)
{
string normalisedParagraph = NormaliseParagraph(paragraph);
List<Span> matchedSpans = new List<Span>();
Match match = _parserExpression.Match(normalisedParagraph);
while (match.Success)
{
if (match.Groups[6].Success)
{
// No formatting tokens found:
matchedSpans.Add(new TextSpan(match.Groups[6].Value));
}
else
{
// Formatting tokens found, with possible text before them:
if (match.Groups[1].Success)
{
matchedSpans.Add(new TextSpan(match.Groups[1].Value));
}
if (match.Groups[4].Success)
{
matchedSpans.Add(new TextSpan(match.Groups[4].Value));
}
if (match.Groups[2].Success)
{
// A paired marker was found, for example **bold** and friends:
string formatToken = match.Groups[2].Value;
string formatText = match.Groups[3].Value;
if (formatToken == "\"\"")
{
// Raw text:
matchedSpans.Add(new TextSpan(formatText));
}
else
{
Span childSpan = Parse(formatText);
matchedSpans.Add(new FormattedSpan(_tokenToSpanKind[formatToken], childSpan));
}
}
else
{
// A reference marker was found:
string referenceContents = match.Groups[5].Value;
Match referenceMatch = _referenceExpression.Match(referenceContents);
if (!referenceMatch.Success)
{
throw new AdornedTextParsingException(AdornedTextStrings.InvalidReferenceContents);
}
string referenceKindTag = referenceMatch.Groups[1].Value;
string referenceString = referenceMatch.Groups[2].Value;
string referenceText = referenceMatch.Groups[3].Value;
matchedSpans.Add(new ReferenceSpan(referenceKindTag, referenceString, Parse(referenceText)));
}
}
match = match.NextMatch();
}
if (matchedSpans.Count == 0)
{
return new TextSpan("");
}
else if (matchedSpans.Count == 1)
{
return matchedSpans[0];
}
else
{
SequenceSpan sequenceSpan = new SequenceSpan();
Functional.ApplyAdd(matchedSpans, sequenceSpan.Spans);
return sequenceSpan;
}
}
public virtual void VisitSequenceSpan(SequenceSpan sequenceSpan)
{
}