public virtual void BuildTableOfContentsItem(StringBuilder builder, HierarchyItem <Heading> heading)
{
if (builder == null)
{
throw new ArgumentNullException("builder");
}
if (heading == null)
{
throw new ArgumentNullException("heading");
}
StartHierarchyItem(builder);
builder.Append("<a href=\"#");
builder.Append(heading.Item.AnchorName);
builder.Append("\">");
builder.Append(heading.Item.Title);
builder.Append("</a>");
BuildTableOfContentsLayer(builder, heading.Children);
EndHierarchyItem(builder);
}
public HierarchyCollection <Heading> GetHeadingHierarchy(string html)
{
var hierarchy = new HierarchyCollection <Heading>();
var headingsStack = new Stack <HierarchyItem <Heading> >();
foreach (var heading in GetHeadings(html))
{
var hiearchyItem = new HierarchyItem <Heading>(heading);
var addedItem = false;
while (headingsStack.Count > 0)
{
// Keep looking up the heading hierarchy until we find the
// first item that is a higher heading type than the current
// heading
var parentHeading = headingsStack.Peek();
if (parentHeading.Item.HeadingType < heading.HeadingType)
{
headingsStack.Push(hiearchyItem);
parentHeading.Children.Add(hiearchyItem);
addedItem = true;
break;
}
headingsStack.Pop();
}
if (!addedItem)
{
headingsStack.Push(hiearchyItem);
hierarchy.Add(hiearchyItem);
}
}
return(hierarchy);
}