public IEnumerable <NavigationPoint> ProcessOrderedListRecursive(
XElement element, NavigationOrderProcessor navigationOrderProcessor, string basePath, IEnumerable <File> files)
{
return(element.Elements()
.Where(e => e.Name.Equals(XmlNamespaces.XHtml + XHtmlTocXmlNames.ListItemElementName))
.Select(e => ProcessListItemRecursive(e, navigationOrderProcessor, basePath, files)));
}
private IEnumerable <NavigationPoint> FilterAndSelectChildNavPoints(
XElement element, NavigationOrderProcessor orderProcessor, string basePath, IEnumerable <File> files)
{
return(element.Elements()
.Where(e => e.Name.Equals(XmlNamespaces.Ncx + NcxXmlNames.NavPointElementName))
.Select(e => ProcessNavPoint(e, orderProcessor, basePath, files))
.ToArray());
}
public IEnumerable <NavigationPoint> ExtractNavigationPoints(
XmlStructureFile xHtmlToc, IEnumerable <File> files)
{
var navigationOrderProcessor = NavigationOrderProcessor.Create();
var navElement = GetRootOrderedList(xHtmlToc.Doc);
return(ProcessOrderedListRecursive(
navElement, navigationOrderProcessor, EpubPathHelper.GetDirectoryName(xHtmlToc.Path), files).ToArray());
}
public IEnumerable <NavigationPoint> ExtractNavigationPoints(XmlStructureFile ncx, IEnumerable <File> files)
{
var root = ncx.Doc.Root;
var basePath = EpubPathHelper.GetDirectoryName(ncx.Path);
var navMap = root.Elements()
.Single(element => element.Name.Equals(XmlNamespaces.Ncx + NcxXmlNames.NavMapElementName));
var orderProcessor = NavigationOrderProcessor.Create(navMap);
return(FilterAndSelectChildNavPoints(navMap, orderProcessor, basePath, files));
}
private NavigationPoint ProcessNavPoint(
XElement element, NavigationOrderProcessor orderProcessor, string basePath, IEnumerable <File> files)
{
var title = element.Elements()
.Single(e => e.Name.Equals(XmlNamespaces.Ncx + NcxXmlNames.NavLabelElementName))
.Elements().Single(e => e.Name.Equals(XmlNamespaces.Ncx + NcxXmlNames.TextElementName))
.Value;
var contentText = element.Elements()
.Single(e => e.Name.Equals(XmlNamespaces.Ncx + NcxXmlNames.ContentElementName))
.GetAttributeValueOrNull(NcxXmlNames.SrcAttributeName) !;
var filePath = SrcTextSplitter.GetFileName(contentText);
var elementId = SrcTextSplitter.GetElementId(contentText);
var fileFullPath = EpubPathHelper.ExpandPath(basePath, filePath);
var file = files.Single(f => f.Path.EqualsIgnoreCaseWithNull(fileFullPath));
var order = orderProcessor.GetOrder(element);
var children = FilterAndSelectChildNavPoints(element, orderProcessor, basePath, files);
return(new NavigationPoint(title, file, elementId, order, children));
}
private NavigationPoint ProcessListItemRecursive(
XElement listItem, NavigationOrderProcessor navigationOrderProcessor, string basePath, IEnumerable <File> files)
{
var linkElement = listItem.Elements()
.Single(element => element.Name.Equals(XmlNamespaces.XHtml + XHtmlTocXmlNames.LinkElementName));
var title = linkElement.Value;
var srcPath = linkElement.GetAttributeValueOrNull(XHtmlTocXmlNames.HrefAttributeName) !;
var filePath = SrcTextSplitter.GetFileName(srcPath);
var elementId = SrcTextSplitter.GetElementId(srcPath);
var order = navigationOrderProcessor.GetOrder(listItem);
var fileFullPath = EpubPathHelper.ExpandPath(basePath, filePath);
var file = files.Single(f => f.Path.EqualsIgnoreCaseWithNull(fileFullPath));
var childOrderedList = listItem.Elements()
.Cast <XElement?>().SingleOrDefault(
e => e !.Name.Equals(XmlNamespaces.XHtml + XHtmlTocXmlNames.OrderedListElementName));
var children = childOrderedList != null
? ProcessOrderedListRecursive(childOrderedList, navigationOrderProcessor, basePath, files).ToArray()
: Array.Empty <NavigationPoint>();
return(new NavigationPoint(title, file, elementId, order, children));
}