public SectionRef(MarkdownParagraph.Heading mdh, string filename)
{
Level = mdh.size;
var spans = mdh.body;
if (spans.Length == 1 && spans.First().IsLiteral)
{
Title = MarkdownUtilities.UnescapeLiteral(spans.First() as MarkdownSpan.Literal).Trim();
if (char.IsDigit(Title[0]) || (Title[0] >= 'A' && Title[0] <= 'D' && Title[1] == '.'))
{
var titleParts = Title.Split(new[] { ' ' }, 2);
Number = titleParts[0];
TitleWithoutNumber = titleParts[1];
}
else
{
Number = null;
TitleWithoutNumber = Title;
}
}
else
{
throw new NotSupportedException($"Heading must be a single literal. Got: {mdh.body}");
}
foreach (var c in Title)
{
if (c >= 'a' && c <= 'z')
{
Url += c;
}
else if (c >= 'A' && c <= 'Z')
{
Url += char.ToLowerInvariant(c);
}
else if (c >= '0' && c <= '9')
{
Url += c;
}
else if (c == '-' || c == '_')
{
Url += c;
}
else if (c == ' ')
{
Url += '-';
}
}
Url = filename + "#" + Url;
BookmarkName = $"_Toc{count:00000}"; count++;
Loc = new SourceLocation(filename, this, mdh, null);
}
static int GetSectionOrderingKey(MarkdownDocument doc)
{
if (doc.Paragraphs.FirstOrDefault() is not MarkdownParagraph.Heading heading)
{
throw new ArgumentException("Document does not start with a heading");
}
if (heading.body.SingleOrDefault() is not MarkdownSpan.Literal literal)
{
throw new ArgumentException("Heading is not a literal");
}
string title = MarkdownUtilities.UnescapeLiteral(literal);
return(title switch
{
"Foreword" => - 10,
"Introduction" => - 5,
string mainSection when char.IsDigit(mainSection[0]) => int.Parse(mainSection.Split(' ')[0]),
string annex when annex.StartsWith("Annex ") => 1000 + annex[6],
_ => throw new ArgumentException($"Unexpected section title: {title}")
});