public Nav() : base(
XDocument.Parse(Resources.nav)
.Descendants(EpubBook.XHtmlNs + "nav")
.SingleOrDefault(a => a.Attribute(EpubBook.EpubNs + "type")?.Value == "toc")
.Element(EpubBook.XHtmlNs + "ol")
)
{
this.NavGuide = new(this.BaseElement.Document);
}
public Nav(string content) : base(
XDocument.Parse(content)
.Descendants(EpubBook.XHtmlNs + "nav")
.SingleOrDefault(a => a.Attribute(EpubBook.EpubNs + "type")?.Value == "toc")
.Element(EpubBook.XHtmlNs + "ol")
)
{
var guide = this.BaseElement.Document
.Descendants(EpubBook.XHtmlNs + "nav")
.SingleOrDefault(a => a.Attribute(EpubBook.EpubNs + "type")?.Value == "landmarks");
if (guide == default)
{
var contentElement = XElement.Parse(Resources.navGuideCover);
contentElement.FirstAttribute.Remove();
contentElement.FirstAttribute.Remove();
var body = this.BaseElement.Document.Descendants(EpubBook.XHtmlNs + "body").First();
body.Add(contentElement);
}
this.NavGuide = new(this.BaseElement.Document);
}