/// <summary>
/// Returns the list of all elements mentioned in the Children
/// </summary>
private IEnumerable <string> GetDtdElementNamesFromChildElements(DtdChildElements children)
{
switch (children.ElementType)
{
case DtdChildElements.DtdChildElementTypes.SingleChild:
// is a single ChildElement
yield return(children.ElementName);
break;
case DtdChildElements.DtdChildElementTypes.ChildList:
for (int i = 0; i < children.ChildrenCount; i++)
{
foreach (string childElementName in this.GetDtdElementNamesFromChildElements(children.Child(i)))
{
yield return(childElementName);
}
}
break;
case DtdChildElements.DtdChildElementTypes.Empty:
break;
default:
throw new ApplicationException($"unknown DTDChildElementType {children.ElementType}");
}
yield return("#COMMENT"); //Add the comment tag, as this is always allowed
}
/// <summary>
/// Lines up a child element in the list
/// </summary>
private void SaveChildElement(string code)
{
code = code.Trim();
var child = new DtdChildElements(code); // Create new child or child list from the code
//if (child.Art ==DTDChildElementArten.EinzelChild)
//{
// Trace.WriteLine(code + child._defAnzahl.ToString());
//}
this.children.Add(child); // Save child to list
}
/// <summary>
/// Searches the child block for new elements
/// </summary>
private void Search(DtdChildElements childBlock)
{
switch (childBlock.ElementType)
{
case DtdChildElements.DtdChildElementTypes.Empty:
break;
case DtdChildElements.DtdChildElementTypes.SingleChild:
if (!Elements.Contains(childBlock.ElementName))
{
Elements.Add(childBlock.ElementName);
}
break;
case DtdChildElements.DtdChildElementTypes.ChildList:
for (int iChild = 0; iChild < childBlock.ChildrenCount; iChild++)
{
this.Search(childBlock.Child(iChild));
}
break;
}
}
public AllPossibleElementsOfAChildBlock(DtdChildElements childBlock)
{
this.Elements = new HashSet <string>();
this.Search(childBlock);
}
