void ParseProtoStatements()
{
// protoStatement | protoStatement protoStatements | empty
for (; ;)
{
object token = PeekNextToken();
if (token == null)
{
ErrorUnexpectedEndOfStream();
}
VRMLTokenIdKeywordOrFieldType idToken = token as VRMLTokenIdKeywordOrFieldType;
if (idToken == null)
{
ErrorParsingToken("statement keyword or node id", "", "proto statements");
}
switch (idToken.id)
{
case "PROTO":
case "EXTERNPROTO":
string nodeTypeId;
X3DPrototypeInstance proto = ParseProtoStatement(out nodeTypeId);
protoDefinitions.Add(nodeTypeId, proto);
break;
default: return;
}
}
}
X3DPrototypeInstance ParseProto(out string nodeTypeId)
{
// PROTO nodeTypeId [ interfaceDeclarations ] { protoBody }
PushNameState();
inPROTO = true;
string tokenPROTO = GetNextIDToken();
if (tokenPROTO != "PROTO")
{
ErrorParsingToken("PROTO", tokenPROTO, "PROTO statement");
}
nodeTypeId = GetNextIDToken();
char ts = GetNextTerminalSymbolToken();
if (ts != '[')
{
ErrorParsingToken("[", ts.ToString(), "PROTO statement '" + nodeTypeId + "'");
}
List <InterfaceDeclaration> interfaceDeclarations = ParseInterfaceDeclarations();
ts = GetNextTerminalSymbolToken();
if (ts != ']')
{
ErrorParsingToken("]", ts.ToString(), "PROTO statement '" + nodeTypeId + "'");
}
ts = GetNextTerminalSymbolToken();
if (ts != '{')
{
ErrorParsingToken("{", ts.ToString(), "PROTO statement '" + nodeTypeId + "'");
}
ParseProtoBody();
ts = GetNextTerminalSymbolToken();
if (ts != '}')
{
ErrorParsingToken("}", ts.ToString(), "PROTO statement '" + nodeTypeId + "'");
}
// Proto node of the type of the first node
X3DPrototypeInstance ret = nodes[0].GetProto();
ret.InterfaceDeclarations = interfaceDeclarations;
ret.ProtoNodeName = nodeTypeId;
ret.Nodes = nodes;
PopNameState();
return(ret);
}
void ParseStatement()
{
// nodeStatement | protoStatement | exportStatement | importStatement | routeStatement
object token = PeekNextToken();
if (token == null)
{
ErrorUnexpectedEndOfStream();
}
VRMLTokenIdKeywordOrFieldType idToken = token as VRMLTokenIdKeywordOrFieldType;
if (idToken == null)
{
ErrorParsingToken("statement keyword or node id", "", "statement");
}
switch (idToken.id)
{
case "PROTO":
case "EXTERNPROTO":
string nodeTypeId;
int lineOfProtoStart = line;
X3DPrototypeInstance proto = ParseProtoStatement(out nodeTypeId);
if (protoDefinitions.ContainsKey(nodeTypeId))
{
ErrorParsing(VRMLReaderError.PROTOAlreadyDefined, lineOfProtoStart);
}
else
{
protoDefinitions.Add(nodeTypeId, proto);
}
break;
case "EXPORT": ParseExportStatement(); break;
case "IMPORT": ParseImportStatement(); break;
case "ROUTE": ParseRouteStatement(); break;
default:
X3DNode node = ParseNodeStatement();
if (node != null)
{
nodes.Add(node);
}
break;
}
}