public override bool Match(InlineProcessor processor, ref StringSlice slice)
{
// First, some definitions.
// A delimiter run is a sequence of one or more delimiter characters that is not preceded or followed by the same delimiter character
// The amount of delimiter characters in the delimiter run may exceed emphasisDesc.MaximumCount, as that is handeled in `ProcessEmphasis`
var delimiterChar = slice.CurrentChar;
var emphasisDesc = emphasisMap[delimiterChar];
char pc = (char)0;
if (processor.Inline is HtmlEntityInline htmlEntityInline)
{
if (htmlEntityInline.Transcoded.Length > 0)
{
pc = htmlEntityInline.Transcoded[htmlEntityInline.Transcoded.End];
}
}
if (pc == 0)
{
pc = slice.PeekCharExtra(-1);
if (pc == delimiterChar && slice.PeekCharExtra(-2) != '\\')
{
// If we get here, we determined that either:
// a) there weren't enough delimiters in the delimiter run to satisfy the MinimumCount condition
// b) the previous character couldn't open/close
return(false);
}
}
var startPosition = slice.Start;
int delimiterCount = 0;
char c;
do
{
delimiterCount++;
c = slice.NextChar();
} while (c == delimiterChar);
// If the emphasis doesn't have the minimum required character
if (delimiterCount < emphasisDesc.MinimumCount)
{
return(false);
}
// The following character is actually an entity, we need to decode it
if (HtmlEntityParser.TryParse(ref slice, out string htmlString, out int htmlLength))
{
c = htmlString[0];
}
// Calculate Open-Close for current character
CharHelper.CheckOpenCloseDelimiter(pc, c, emphasisDesc.EnableWithinWord, out bool canOpen, out bool canClose);
// We have potentially an open or close emphasis
if (canOpen || canClose)
{
var delimiterType = DelimiterType.Undefined;
if (canOpen)
{
delimiterType |= DelimiterType.Open;
}
if (canClose)
{
delimiterType |= DelimiterType.Close;
}
var delimiter = new EmphasisDelimiterInline(this, emphasisDesc)
{
DelimiterCount = delimiterCount,
Type = delimiterType,
Span = new SourceSpan(processor.GetSourcePosition(startPosition, out int line, out int column), processor.GetSourcePosition(slice.Start - 1)),
Column = column,
Line = line,
};
processor.Inline = delimiter;
return(true);
}
// We don't have an emphasis
return(false);
}