private static EpubNavigationPageTarget ReadNavigationPageTarget(XElement navigationPageTargetNode)
{
EpubNavigationPageTarget result = new EpubNavigationPageTarget();
foreach (XAttribute navigationPageTargetNodeAttribute in navigationPageTargetNode.Attributes())
{
string attributeValue = navigationPageTargetNodeAttribute.Value;
switch (navigationPageTargetNodeAttribute.Name.LocalName.ToLowerInvariant())
{
case "id":
result.Id = attributeValue;
break;
case "value":
result.Value = attributeValue;
break;
case "type":
EpubNavigationPageTargetType type;
if (!Enum.TryParse(attributeValue, out type))
{
throw new Exception(String.Format("Incorrect EPUB navigation page target: {0} is incorrect value for page target type.", attributeValue));
}
result.Type = type;
break;
case "class":
result.Class = attributeValue;
break;
case "playOrder":
result.PlayOrder = attributeValue;
break;
}
}
if (result.Type == default(EpubNavigationPageTargetType))
{
throw new Exception("Incorrect EPUB navigation page target: page target type is missing.");
}
foreach (XElement navigationPageTargetChildNode in navigationPageTargetNode.Elements())
{
switch (navigationPageTargetChildNode.Name.LocalName.ToLowerInvariant())
{
case "navlabel":
EpubNavigationLabel navigationLabel = ReadNavigationLabel(navigationPageTargetChildNode);
result.NavigationLabels.Add(navigationLabel);
break;
case "content":
EpubNavigationContent content = ReadNavigationContent(navigationPageTargetChildNode);
result.Content = content;
break;
}
}
if (!result.NavigationLabels.Any())
{
throw new Exception("Incorrect EPUB navigation page target: at least one navLabel element is required.");
}
return(result);
}
private static EpubNavigationPageList ReadNavigationPageList(XElement navigationPageListNode)
{
EpubNavigationPageList result = new EpubNavigationPageList();
foreach (XElement pageTargetNode in navigationPageListNode.Elements())
{
if (String.Compare(pageTargetNode.Name.LocalName, "pageTarget", StringComparison.OrdinalIgnoreCase) == 0)
{
EpubNavigationPageTarget pageTarget = ReadNavigationPageTarget(pageTargetNode);
result.Add(pageTarget);
}
}
return(result);
}
