private static Epub3NavLi ReadEpub3NavLi(XElement epub3NavLiNode)
{
Epub3NavLi epub3NavLi = new Epub3NavLi();
foreach (XElement navLiChildNode in epub3NavLiNode.Elements())
{
switch (navLiChildNode.GetLowerCaseLocalName())
{
case "a":
Epub3NavAnchor epub3NavAnchor = ReadEpub3NavAnchor(navLiChildNode);
epub3NavLi.Anchor = epub3NavAnchor;
break;
case "span":
Epub3NavSpan epub3NavSpan = ReadEpub3NavSpan(navLiChildNode);
epub3NavLi.Span = epub3NavSpan;
break;
case "ol":
Epub3NavOl epub3NavOl = ReadEpub3NavOl(navLiChildNode);
epub3NavLi.ChildOl = epub3NavOl;
break;
}
}
return(epub3NavLi);
}
private static List <EpubNavigationItemRef> GetNavigationItems(EpubBookRef bookRef, Epub3NavOl epub3NavOl)
{
List <EpubNavigationItemRef> result = new List <EpubNavigationItemRef>();
if (epub3NavOl != null && epub3NavOl.Lis != null)
{
foreach (Epub3NavLi epub3NavLi in epub3NavOl.Lis)
{
if (epub3NavLi != null && (epub3NavLi.Anchor != null || epub3NavLi.Span != null))
{
if (epub3NavLi.Anchor != null)
{
Epub3NavAnchor navAnchor = epub3NavLi.Anchor;
EpubNavigationItemRef navigationItemRef = EpubNavigationItemRef.CreateAsLink();
navigationItemRef.Title = GetFirstNonEmptyHeader(navAnchor.Text, navAnchor.Title, navAnchor.Alt);
navigationItemRef.Link = new EpubNavigationItemLink(navAnchor.Href);
navigationItemRef.HtmlContentFileRef = GetHtmlContentFileRef(bookRef, navigationItemRef.Link.ContentFileName);
navigationItemRef.NestedItems = GetNavigationItems(bookRef, epub3NavLi.ChildOl);
result.Add(navigationItemRef);
}
else if (epub3NavLi.Span != null)
{
Epub3NavSpan navSpan = epub3NavLi.Span;
EpubNavigationItemRef navigationItemRef = EpubNavigationItemRef.CreateAsHeader();
navigationItemRef.Title = GetFirstNonEmptyHeader(navSpan.Text, navSpan.Title, navSpan.Alt);
navigationItemRef.NestedItems = GetNavigationItems(bookRef, epub3NavLi.ChildOl);
result.Add(navigationItemRef);
}
}
}
}
return(result);
}
private static Epub3NavSpan ReadEpub3NavSpan(XElement epub3NavSpanNode)
{
Epub3NavSpan epub3NavSpan = new Epub3NavSpan();
foreach (XAttribute navSpanNodeAttribute in epub3NavSpanNode.Attributes())
{
string attributeValue = navSpanNodeAttribute.Value;
switch (navSpanNodeAttribute.GetLowerCaseLocalName())
{
case "title":
epub3NavSpan.Title = attributeValue;
break;
case "alt":
epub3NavSpan.Alt = attributeValue;
break;
}
}
epub3NavSpan.Text = epub3NavSpanNode.Value.Trim();
return(epub3NavSpan);
}
