private static EpubSpine ReadSpine(XmlNode spineNode)
{
EpubSpine result = new EpubSpine();
XmlAttribute tocAttribute = spineNode.Attributes["toc"];
if (tocAttribute == null || String.IsNullOrWhiteSpace(tocAttribute.Value))
{
throw new Exception("Incorrect EPUB spine: TOC is missing");
}
result.Toc = tocAttribute.Value;
foreach (XmlNode spineItemNode in spineNode.ChildNodes)
{
if (String.Compare(spineItemNode.LocalName, "itemref", StringComparison.OrdinalIgnoreCase) == 0)
{
EpubSpineItemRef spineItemRef = new EpubSpineItemRef();
XmlAttribute idRefAttribute = spineItemNode.Attributes["idref"];
if (idRefAttribute == null || String.IsNullOrWhiteSpace(idRefAttribute.Value))
{
throw new Exception("Incorrect EPUB spine: item ID ref is missing");
}
spineItemRef.IdRef = idRefAttribute.Value;
XmlAttribute linearAttribute = spineItemNode.Attributes["linear"];
spineItemRef.IsLinear = linearAttribute == null || String.Compare(linearAttribute.Value, "no", StringComparison.OrdinalIgnoreCase) != 0;
result.Add(spineItemRef);
}
}
return(result);
}
private static EpubSpine ReadSpine(XElement spineNode)
{
var result = new EpubSpine();
var tocAttribute = spineNode.Attribute("toc");
if (string.IsNullOrWhiteSpace(tocAttribute?.Value))
{
throw new Exception("Incorrect EPUB spine: TOC is missing");
}
result.Toc = tocAttribute?.Value;
foreach (var spineItemNode in spineNode.Elements())
{
if (string.Compare(spineItemNode.Name.LocalName, "itemref", StringComparison.OrdinalIgnoreCase) is 0)
{
var spineItemRef = new EpubSpineItemRef();
var idRefAttribute = spineItemNode.Attribute("idref");
if (idRefAttribute is null || string.IsNullOrWhiteSpace(idRefAttribute.Value))
{
throw new Exception("Incorrect EPUB spine: item ID ref is missing");
}
spineItemRef.IdRef = idRefAttribute.Value;
var linearAttribute = spineItemNode.Attribute("linear");
spineItemRef.IsLinear = linearAttribute is null || string.Compare(linearAttribute.Value, "no", StringComparison.OrdinalIgnoreCase) != 0;
result.Add(spineItemRef);
}
}
return(result);
}
private static EpubSpine ReadSpine(XElement spineNode, EpubVersion epubVersion)
{
EpubSpine result = new EpubSpine();
foreach (XAttribute spineNodeAttribute in spineNode.Attributes())
{
string attributeValue = spineNodeAttribute.Value;
switch (spineNodeAttribute.GetLowerCaseLocalName())
{
case "id":
result.Id = attributeValue;
break;
case "page-progression-direction":
result.PageProgressionDirection = PageProgressionDirectionParser.Parse(attributeValue);
break;
case "toc":
result.Toc = attributeValue;
break;
}
}
if (epubVersion == EpubVersion.EPUB_2 && String.IsNullOrWhiteSpace(result.Toc))
{
throw new Exception("Incorrect EPUB spine: TOC is missing");
}
foreach (XElement spineItemNode in spineNode.Elements())
{
if (spineItemNode.CompareNameTo("itemref"))
{
EpubSpineItemRef spineItemRef = new EpubSpineItemRef();
foreach (XAttribute spineItemNodeAttribute in spineItemNode.Attributes())
{
string attributeValue = spineItemNodeAttribute.Value;
switch (spineItemNodeAttribute.GetLowerCaseLocalName())
{
case "id":
spineItemRef.Id = attributeValue;
break;
case "idref":
spineItemRef.IdRef = attributeValue;
break;
case "properties":
spineItemRef.Properties = SpinePropertyParser.ParsePropertyList(attributeValue);
break;
}
}
if (String.IsNullOrWhiteSpace(spineItemRef.IdRef))
{
throw new Exception("Incorrect EPUB spine: item ID ref is missing");
}
XAttribute linearAttribute = spineItemNode.Attribute("linear");
spineItemRef.IsLinear = linearAttribute == null || !linearAttribute.CompareValueTo("no");
result.Add(spineItemRef);
}
}
return(result);
}
private static async Task <EpubSpine> ReadSpineAsync(XmlReader reader)
{
EpubSpine result = new EpubSpine();
bool spineFound = await reader.ReadToFollowingAsync("spine", "http://www.idpf.org/2007/opf");
if (!spineFound)
{
throw new Exception("EPUB parsing error: spine declarations not found in the package.");
}
if (String.IsNullOrWhiteSpace(reader.GetAttribute("toc")))
{
throw new Exception("Incorrect EPUB spine: TOC attribute is missing or empty");
}
result.Toc = reader.GetAttribute("toc");
while (await reader.ReadAsync() && !(reader.NodeType == XmlNodeType.EndElement && reader.LocalName == "spine"))
{
if (reader.LocalName.ToLowerInvariant() == "itemref")
{
EpubSpineItemRef spineItemRef = new EpubSpineItemRef();
spineItemRef.IsLinear = true;
while (reader.MoveToNextAttribute())
{
switch (reader.LocalName.ToLowerInvariant())
{
case "idref":
spineItemRef.IdRef = reader.Value;
break;
case "linear":
if (reader.Value.ToLowerInvariant() == "no")
{
spineItemRef.IsLinear = false;
}
break;
}
}
result.Add(spineItemRef);
}
}
return(result);
}
