protected override void OnRefreshDocumentOutline()
{
base.OnRefreshDocumentOutline();
// Show document headings
var parser = new WikitextParser();
var documentText = TextBox.Text;
Heading[] headings = null;
if (!string.IsNullOrWhiteSpace(documentText))
{
var root = parser.Parse(documentText);
headings = root.EnumDescendants().OfType <Heading>().ToArray();
}
Dispatcher.AutoInvoke(() =>
{
DocumentOutline.Clear();
if (headings == null)
{
return;
}
var levelStack = new Stack <Tuple <Heading, DocumentOutlineItem> >();
foreach (var h in headings)
{
var outline = new DocumentOutlineItem
{
Text = string.Join(null, h.Inlines).Trim(),
OutlineContext = h
};
outline.DoubleClick += OutlineItem_DoubleClick;
while (levelStack.Count > 0)
{
var lastLevel = levelStack.Peek().Item1.Level;
if (lastLevel < h.Level)
{
// Append as child item.
levelStack.Peek().Item2.Children.Add(outline);
goto NEXT;
}
// Sibling or upper levels.
levelStack.Pop();
}
// levelStack.Count == 0
DocumentOutline.Add(outline);
levelStack.Push(Tuple.Create(h, outline));
NEXT:
;
}
});
}
/// <summary>
/// Parses a DocumentOutline element.
/// </summary>
DocumentOutline ParseDocumentOutline()
{
Debug.Assert(reader.Name == "DocumentOutline");
bool isEmptyElement = reader.IsEmptyElement;
DocumentOutline documentOutline = new DocumentOutline();
while (MoveToNextAttribute())
{
switch (reader.Name)
{
case "xml:lang":
documentOutline.lang = reader.Value;
break;
default:
UnexpectedAttribute(reader.Name);
break;
}
}
MoveToNextElement();
return(documentOutline);
}
