public ObservableCollection <HeaderItem> CreateDocumentOutline(string md)
{
if (string.IsNullOrEmpty(md))
{
return(null);
}
var syntax = Markdig.Markdown.Parse(md);
var lines = StringUtils.GetLines(md);
bool inFrontMatter = false;
var list = new ObservableCollection <HeaderItem>();
foreach (var item in syntax)
{
var line = item.Line;
var content = lines[line].TrimStart(' ', '#');;
if (line == 0 && content == "---")
{
inFrontMatter = true;
continue;
}
if (inFrontMatter && content == "---")
{
inFrontMatter = false;
continue;
}
if (inFrontMatter)
{
continue;
}
if (item is HeadingBlock)
{
var heading = item as HeadingBlock;
if (heading.Level > AppModel.Configuration.MaxDocumentOutlineLevel)
{
continue;
}
// underlined format
if (line > 0 && (content.StartsWith("---") || content.StartsWith("===")))
{
line--;
content = lines[line].TrimStart(' ', '#');
}
var headerItem = new HeaderItem()
{
Text = $"{content}",
Level = heading.Level,
Line = line,
LinkId = LinkHelper.UrilizeAsGfm(content.TrimEnd())
};
list.Add(headerItem);
}
}
return(list);
}
public ObservableCollection <HeaderItem> CreateDocumentOutline(string md)
{
if (string.IsNullOrEmpty(md))
{
return(null);
}
// create a full pipeline to strip out front matter/yaml
var parser = new MarkdownParserMarkdig();
var builder = parser.CreatePipelineBuilder();
var syntax = Markdig.Markdown.Parse(md, builder.Build());
var list = new ObservableCollection <HeaderItem>();
foreach (var item in syntax)
{
var line = item.Line;
if (item is HeadingBlock)
{
var heading = item as HeadingBlock;
var inline = heading?.Inline?.FirstChild;
if (inline == null)
{
continue;
}
StringBuilder sb = new StringBuilder();
foreach (var inl in heading.Inline)
{
if (inl is HtmlEntityInline)
{
var htmlEntity = inl as HtmlEntityInline;
sb.Append(WebUtility.HtmlDecode(htmlEntity.Transcoded.ToString()));
}
else if (inl is CodeInline)
{
var codeInline = inl as CodeInline;
sb.Append(WebUtility.HtmlDecode(codeInline.Content));
}
else if (inl is LinkInline)
{
var link = inl as LinkInline;
var textInline = link?.FirstOrDefault(l => l is LiteralInline)?.ToString();
if (textInline == null)
{
textInline = "-- non-text header --";
}
sb.Append(WebUtility.HtmlDecode(textInline));
}
else
{
sb.Append(inl.ToString());
}
}
var content = sb.ToString();
if (content.Contains("\n"))
{
continue;
}
if (heading.Level > AppModel.Configuration.MaxDocumentOutlineLevel)
{
continue;
}
var headerItem = new HeaderItem()
{
Text = content,
Level = heading.Level,
Line = line,
LinkId = LinkHelper.UrilizeAsGfm(content.TrimEnd())
};
list.Add(headerItem);
}
}
return(list);
}