public static TableOfContents GetTableOfContents(this EBook eBook)
{
if (eBook.Spine == null)
{
eBook.Spine = eBook.GetSpine();
}
var tocXml = File.ReadAllText(eBook.Manifest[eBook.Spine.Toc].ContentLocation);
var doc = XDocument.Parse(tocXml);
var ns = doc.Root.GetDefaultNamespace();
var ncxNode = doc.Element(ns + "ncx");
var tableOfContents = new TableOfContents
{
Title = ncxNode.Element(ns + "docTitle").Element(ns + "text").Value
};
var navMapNode = ncxNode.Element(ns + "navMap");
IEnumerable <NavPoint> ParseNavPoints(XElement node, int level)
{
var navPoints = new List <NavPoint>();
var navPointNodes = node.Elements(ns + "navPoint").ToList();
foreach (var navPointNode in navPointNodes)
{
var filePath = navPointNode.Element(ns + "content").Attribute("src").Value;
var pathBuilder = new StringBuilder();
foreach (var c in filePath)
{
if (c == '#' && pathBuilder.ToString().EndsWith(".html"))
{
break;
}
pathBuilder.Append(c);
}
var navPoint = new NavPoint
{
ContentPath = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(eBook.Manifest[eBook.Spine.Toc].ContentLocation), pathBuilder.ToString())),
Id = navPointNode.Attribute("id")?.Value,
Level = level,
PlayOrder = int.Parse(navPointNode.Attribute("playOrder")?.Value),
Text = navPointNode.Element(ns + "navLabel")?.Element(ns + "text")?.Value
};
foreach (var subNavPoint in ParseNavPoints(navPointNode, level + 1).ToList())
{
navPoint.Items.Add(subNavPoint);
}
navPoints.Add(navPoint);
}
return(navPoints);
}
foreach (var navPoint in ParseNavPoints(navMapNode, 0).ToList())
{
tableOfContents.Items.Add(navPoint);
}
return(tableOfContents);
}