public static EpubNavigation ReadNavigation(ZipArchive epubArchive, string contentDirectoryPath, EpubPackage package)
{
EpubNavigation result = new EpubNavigation();
string tocId = package.Spine.Toc;
if (String.IsNullOrEmpty(tocId))
throw new Exception("EPUB parsing error: TOC ID is empty.");
EpubManifestItem tocManifestItem = package.Manifest.FirstOrDefault(item => String.Compare(item.Id, tocId, StringComparison.OrdinalIgnoreCase) == 0);
if (tocManifestItem == null)
throw new Exception(String.Format("EPUB parsing error: TOC item {0} not found in EPUB manifest.", tocId));
string tocFileEntryPath = ZipPathUtils.Combine(contentDirectoryPath, tocManifestItem.Href);
ZipArchiveEntry tocFileEntry = epubArchive.GetEntry(tocFileEntryPath);
if (tocFileEntry == null)
throw new Exception(String.Format("EPUB parsing error: TOC file {0} not found in archive.", tocFileEntryPath));
if (tocFileEntry.Length > Int32.MaxValue)
throw new Exception(String.Format("EPUB parsing error: TOC file {0} is bigger than 2 Gb.", tocFileEntryPath));
XmlDocument containerDocument;
using (Stream containerStream = tocFileEntry.Open())
containerDocument = XmlUtils.LoadDocument(containerStream);
XmlNamespaceManager xmlNamespaceManager = new XmlNamespaceManager(containerDocument.NameTable);
xmlNamespaceManager.AddNamespace("ncx", "http://www.daisy.org/z3986/2005/ncx/");
XmlNode headNode = containerDocument.DocumentElement.SelectSingleNode("ncx:head", xmlNamespaceManager);
if (headNode == null)
throw new Exception("EPUB parsing error: TOC file does not contain head element");
EpubNavigationHead navigationHead = ReadNavigationHead(headNode);
result.Head = navigationHead;
XmlNode docTitleNode = containerDocument.DocumentElement.SelectSingleNode("ncx:docTitle", xmlNamespaceManager);
if (docTitleNode == null)
throw new Exception("EPUB parsing error: TOC file does not contain docTitle element");
EpubNavigationDocTitle navigationDocTitle = ReadNavigationDocTitle(docTitleNode);
result.DocTitle = navigationDocTitle;
result.DocAuthors = new List<EpubNavigationDocAuthor>();
foreach (XmlNode docAuthorNode in containerDocument.DocumentElement.SelectNodes("ncx:docAuthor", xmlNamespaceManager))
{
EpubNavigationDocAuthor navigationDocAuthor = ReadNavigationDocAuthor(docAuthorNode);
result.DocAuthors.Add(navigationDocAuthor);
}
XmlNode navMapNode = containerDocument.DocumentElement.SelectSingleNode("ncx:navMap", xmlNamespaceManager);
if (navMapNode == null)
throw new Exception("EPUB parsing error: TOC file does not contain navMap element");
EpubNavigationMap navMap = ReadNavigationMap(navMapNode);
result.NavMap = navMap;
XmlNode pageListNode = containerDocument.DocumentElement.SelectSingleNode("ncx:pageList", xmlNamespaceManager);
if (pageListNode != null)
{
EpubNavigationPageList pageList = ReadNavigationPageList(pageListNode);
result.PageList = pageList;
}
result.NavLists = new List<EpubNavigationList>();
foreach (XmlNode navigationListNode in containerDocument.DocumentElement.SelectNodes("ncx:navList", xmlNamespaceManager))
{
EpubNavigationList navigationList = ReadNavigationList(navigationListNode);
result.NavLists.Add(navigationList);
}
return result;
}
public static async Task<EpubNavigation> ReadNavigationAsync(ZipArchive epubArchive, string contentDirectoryPath, EpubPackage package)
{
EpubNavigation result = new EpubNavigation();
string tocId = package.Spine.Toc;
XmlReaderSettings xmlReaderSettings = new XmlReaderSettings
{
// XmlResolver = null,
Async = true,
DtdProcessing = DtdProcessing.Ignore
};
if (String.IsNullOrEmpty(tocId))
throw new Exception("EPUB parsing error: TOC ID is empty.");
//Cheking if toc id referenced in spine exist in manifest
EpubManifestItem tocManifestItem = package.Manifest.FirstOrDefault(item => String.Compare(item.Id, tocId, StringComparison.OrdinalIgnoreCase) == 0);
if (tocManifestItem == null)
throw new Exception(String.Format("EPUB parsing error: TOC item {0} not found in EPUB manifest.", tocId));
//Opening .toc file in archive using href-reference from manifest
string tocFileEntryPath = ZipPathUtils.Combine(contentDirectoryPath, tocManifestItem.Href);
ZipArchiveEntry tocFileEntry = epubArchive.GetEntry(tocFileEntryPath);
if (tocFileEntry == null)
throw new Exception(String.Format("EPUB parsing error: TOC file {0} not found in archive.", tocFileEntryPath));
if (tocFileEntry.Length > Int32.MaxValue)
throw new Exception(String.Format("EPUB parsing error: TOC file {0} is bigger than 2 Gb.", tocFileEntryPath));
// ------------------ Actual Parsing starts here: -------------------------
using (Stream containerStream = tocFileEntry.Open())
{
using (XmlReader xmlReader = XmlReader.Create(containerStream, xmlReaderSettings))
{
result.Head = await ReadNavigationHeadAsync(xmlReader);
result.DocTitle = await ReadNavigationDocTitleAsync(xmlReader);
result.DocAuthors = await ReadNavigationAuthorsAsync(xmlReader);
result.NavMap = await ReadNavigationMapAsync(xmlReader);
result.NavLists = new List<EpubNavigationList>(); //Empty, because not implemented
result.PageList = new EpubNavigationPageList(); //Empty, because not implemented
}
}
return result;
//-------------------------------------------Boring old style Silverlight code...-----------------------------------------------------------------
//------------------------------------------------------------------------------------------------------------------------------------------------
//XmlDocument containerDocument;
//containerDocument = XmlDocument.Load(containerStream);
//XmlNamespaceManager xmlNamespaceManager = new XmlNamespaceManager(containerDocument.NameTable);
//xmlNamespaceManager.AddNamespace("ncx", "http://www.daisy.org/z3986/2005/ncx/");
////Parsing head section
//XmlNode headNode = containerDocument.DocumentElement.SelectSingleNode("ncx:head", xmlNamespaceManager);
//if (headNode == null)
// throw new Exception("EPUB parsing error: TOC file does not contain head element");
//EpubNavigationHead navigationHead = ReadNavigationHead(headNode);
//result.Head = navigationHead;
////Parsing title
//XmlNode docTitleNode = containerDocument.DocumentElement.SelectSingleNode("ncx:docTitle", xmlNamespaceManager);
//if (docTitleNode == null)
// throw new Exception("EPUB parsing error: TOC file does not contain docTitle element");
//EpubNavigationDocTitle navigationDocTitle = ReadNavigationDocTitle(docTitleNode);
//result.DocTitle = navigationDocTitle;
////Parsing authors section...
//result.DocAuthors = new List<EpubNavigationDocAuthor>();
//foreach (XmlNode docAuthorNode in containerDocument.DocumentElement.SelectNodes("ncx:docAuthor", xmlNamespaceManager))
//{
// EpubNavigationDocAuthor navigationDocAuthor = ReadNavigationDocAuthor(docAuthorNode);
// result.DocAuthors.Add(navigationDocAuthor);
//}
//Parsing navMap section
//XmlNode navMapNode = containerDocument.DocumentElement.SelectSingleNode("ncx:navMap", xmlNamespaceManager);
//if (navMapNode == null)
// throw new Exception("EPUB parsing error: TOC file does not contain navMap element");
//EpubNavigationMap navMap = ReadNavigationMap(navMapNode);
//result.NavMap = navMap;
//-----------------------------------TO-DO: Implement -----------------------------------------------------------
//TO-DO: Implement pageList parsing. Needed to tide-up position inside epub to actual pages of the printed book
//--------------------------------------------------------------------------------------------------------------
//Parsing pageList node
//XmlNode pageListNode = containerDocument.DocumentElement.SelectSingleNode("ncx:pageList", xmlNamespaceManager);
//if (pageListNode != null)
//{
// EpubNavigationPageList pageList = ReadNavigationPageList(pageListNode);
// result.PageList = pageList;
//}
////TO-DO: Implement navList parsing. It is a secondary navigation system for supplied book info - schemes, fugures, diagrams, illustrations etc
////Parsing navList nodes
//result.NavLists = new List<EpubNavigationList>();
//foreach (XmlNode navigationListNode in containerDocument.DocumentElement.SelectNodes("ncx:navList", xmlNamespaceManager))
//{
// EpubNavigationList navigationList = ReadNavigationList(navigationListNode);
// result.NavLists.Add(navigationList);
//}
//--------------------------------------------------------------------------------------------------------------
}
