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 List <EpubNavigationItemRef> GetNavigationItems(EpubBookRef bookRef, Epub3Nav epub3Nav)
{
List <EpubNavigationItemRef> result;
if (epub3Nav != null)
{
if (epub3Nav.Head != null)
{
result = new List <EpubNavigationItemRef>();
EpubNavigationItemRef navigationItemRef = EpubNavigationItemRef.CreateAsHeader();
navigationItemRef.Title = epub3Nav.Head;
navigationItemRef.NestedItems = GetNavigationItems(bookRef, epub3Nav.Ol);
result.Add(navigationItemRef);
}
else
{
result = GetNavigationItems(bookRef, epub3Nav.Ol);
}
}
else
{
result = new List <EpubNavigationItemRef>();
}
return(result);
}
private static void PrintNavigationItem(EpubNavigationItemRef navigationItemRef, int identLevel)
{
Console.Write(new string(' ', identLevel * 2));
Console.WriteLine(navigationItemRef.Title);
foreach (EpubNavigationItemRef nestedNavigationItemRef in navigationItemRef.NestedItems)
{
PrintNavigationItem(nestedNavigationItemRef, identLevel + 1);
}
}
private static string PrintNavigationItem(EpubNavigationItemRef navigationItemRef, int identLevel)
{
StringBuilder result = new StringBuilder();
result.Append(new string(' ', identLevel * 2));
result.AppendLine(navigationItemRef.Title);
foreach (EpubNavigationItemRef nestedNavigationItemRef in navigationItemRef.NestedItems)
{
result.Append(PrintNavigationItem(nestedNavigationItemRef, identLevel + 1));
}
return(result.ToString());
}
/// <summary>
/// Use recursion to loop down any sub chapters. Note: none of the epub books I've used to date have sub chapters.
/// </summary>
/// <param name="chapter"></param>
/// <param name="subchapterContent"></param>
/// <param name="IsFirst"></param>
/// <returns></returns>
private string BuildSubChapters(EpubNavigationItemRef chapter, string subchapterContent, bool IsFirst = false)
{
if (!IsFirst) // don't need to do the first on as it is the main chapter that has already been processed
{
subchapterContent += chapter.HtmlContentFileRef.ReadContentAsText(); //.FinalHtmlContent;//.ReadHtmlContent();
}
foreach (var subChapter in chapter.NestedItems)
{
subchapterContent += BuildSubChapters(subChapter, subchapterContent);
}
return(subchapterContent);
}
private static List <EpubNavigationItemRef> GetNavigationItems(EpubBookRef bookRef, List <Epub2NcxNavigationPoint> navigationPoints)
{
List <EpubNavigationItemRef> result = new List <EpubNavigationItemRef>();
if (navigationPoints != null)
{
foreach (Epub2NcxNavigationPoint navigationPoint in navigationPoints)
{
EpubNavigationItemRef navigationItemRef = EpubNavigationItemRef.CreateAsLink();
navigationItemRef.Title = navigationPoint.NavigationLabels.First().Text;
navigationItemRef.Link = new EpubNavigationItemLink(navigationPoint.Content.Source);
navigationItemRef.HtmlContentFileRef = GetHtmlContentFileRef(bookRef, navigationItemRef.Link.ContentFileName);
navigationItemRef.NestedItems = GetNavigationItems(bookRef, navigationPoint.ChildNavigationPoints);
result.Add(navigationItemRef);
}
}
return(result);
}
