// Read 'cp' (BNF) of contentdecl (BNF)
private DTDContentModel ReadCP (DTDElementDeclaration elem)
{
DTDContentModel model = null;
TryExpandPERef ();
if(PeekChar () == '(') {
model = new DTDContentModel (DTD, elem.Name);
ReadChar ();
SkipWhitespace ();
model.ChildModels.Add (ReadCP (elem));
SkipWhitespace ();
do {
if (PeekChar () == '%') {
TryExpandPERef ();
continue;
}
if(PeekChar ()=='|') {
// CPType=Or
if (model.OrderType == DTDContentOrderType.Seq)
throw NotWFError ("Inconsistent choice markup in sequence cp.");
model.OrderType = DTDContentOrderType.Or;
ReadChar ();
SkipWhitespace ();
AddContentModel (model.ChildModels, ReadCP (elem));
SkipWhitespace ();
}
else if(PeekChar () == ',') {
// CPType=Seq
if (model.OrderType == DTDContentOrderType.Or)
throw NotWFError ("Inconsistent sequence markup in choice cp.");
model.OrderType = DTDContentOrderType.Seq;
ReadChar ();
SkipWhitespace ();
model.ChildModels.Add (ReadCP (elem));
SkipWhitespace ();
}
else
break;
}
while(true);
ExpectAfterWhitespace (')');
}
else {
TryExpandPERef ();
model = new DTDContentModel (DTD, elem.Name);
model.ElementName = ReadName ();
}
switch(PeekChar ()) {
case '?':
model.Occurence = DTDOccurence.Optional;
ReadChar ();
break;
case '*':
model.Occurence = DTDOccurence.ZeroOrMore;
ReadChar ();
break;
case '+':
model.Occurence = DTDOccurence.OneOrMore;
ReadChar ();
break;
}
return model;
}
private void AddContentModel (DTDContentModelCollection cmc, DTDContentModel cm)
{
if (cm.ElementName != null) {
for (int i = 0; i < cmc.Count; i++) {
if (cmc [i].ElementName == cm.ElementName) {
HandleError (new XmlSchemaException ("Element content must be unique inside mixed content model.",
this.LineNumber,
this.LinePosition,
null,
this.BaseURI,
null));
return;
}
}
}
cmc.Add (cm);
}
// read 'children'(BNF) of contentspec
private void ReadContentSpec (DTDElementDeclaration decl)
{
TryExpandPERef ();
switch(ReadChar ())
{
case 'E':
decl.IsEmpty = true;
Expect ("MPTY");
break;
case 'A':
decl.IsAny = true;
Expect ("NY");
break;
case '(':
DTDContentModel model = decl.ContentModel;
SkipWhitespace ();
TryExpandPERef ();
if(PeekChar () == '#') {
// Mixed Contents. "#PCDATA" must appear first.
decl.IsMixedContent = true;
model.Occurence = DTDOccurence.ZeroOrMore;
model.OrderType = DTDContentOrderType.Or;
Expect ("#PCDATA");
SkipWhitespace ();
TryExpandPERef ();
while(PeekChar () != ')') {
SkipWhitespace ();
if (PeekChar () == '%') {
TryExpandPERef ();
continue;
}
Expect('|');
SkipWhitespace ();
TryExpandPERef ();
DTDContentModel elem = new DTDContentModel (DTD, decl.Name);
// elem.LineNumber = currentInput.LineNumber;
// elem.LinePosition = currentInput.LinePosition;
elem.ElementName = ReadName ();
this.AddContentModel (model.ChildModels, elem);
SkipWhitespace ();
TryExpandPERef ();
}
Expect (')');
if (model.ChildModels.Count > 0)
Expect ('*');
else if (PeekChar () == '*')
Expect ('*');
} else {
// Non-Mixed Contents
model.ChildModels.Add (ReadCP (decl));
SkipWhitespace ();
do { // copied from ReadCP() ...;-)
if (PeekChar () == '%') {
TryExpandPERef ();
continue;
}
if(PeekChar ()=='|') {
// CPType=Or
if (model.OrderType == DTDContentOrderType.Seq)
throw NotWFError ("Inconsistent choice markup in sequence cp.");
model.OrderType = DTDContentOrderType.Or;
ReadChar ();
SkipWhitespace ();
AddContentModel (model.ChildModels, ReadCP (decl));
SkipWhitespace ();
}
else if(PeekChar () == ',')
{
// CPType=Seq
if (model.OrderType == DTDContentOrderType.Or)
throw NotWFError ("Inconsistent sequence markup in choice cp.");
model.OrderType = DTDContentOrderType.Seq;
ReadChar ();
SkipWhitespace ();
model.ChildModels.Add (ReadCP (decl));
SkipWhitespace ();
}
else
break;
}
while(true);
Expect (')');
switch(PeekChar ())
{
case '?':
model.Occurence = DTDOccurence.Optional;
ReadChar ();
break;
case '*':
model.Occurence = DTDOccurence.ZeroOrMore;
ReadChar ();
break;
case '+':
model.Occurence = DTDOccurence.OneOrMore;
ReadChar ();
break;
}
SkipWhitespace ();
}
SkipWhitespace ();
break;
default:
throw NotWFError ("ContentSpec is missing.");
}
}
