protected virtual void ParseNode(ParserContext context)
{
var token = context.PeekNextToken();
if (token.Type == VRML97TokenType.EOF)
{
return;
}
switch (token.Text)
{
case "Script":
ParseScriptNode(context);
break;
default:
var nodeTypeId = ParseNodeTypeId(context);
var node = context.CreateNode(nodeTypeId, context.NodeName);
context.NodeName = null;
context.PushFieldContainer(node);
if (context.ReadNextToken().Type != VRML97TokenType.OpenBrace)
{
throw new InvalidVRMLSyntaxException("Open brace expected");
}
ParseNodeBody(context);
if (context.ReadNextToken().Type != VRML97TokenType.CloseBrace)
{
throw new InvalidVRMLSyntaxException();
}
context.PopFieldContainer();
context.AcceptChild(node);
break;
}
}
public void visit(SFBool field)
{
string value = context.ReadNextToken().Text;
switch (value)
{
case "TRUE":
field.Value = true;
break;
case "FALSE":
field.Value = false;
break;
}
}
protected virtual void ParseScriptNode(ParserContext context)
{
var keyword = context.ReadNextToken();
if (keyword.Text != "Script")
{
throw new InvalidVRMLSyntaxException("Script expected");
}
context.ReadOpenBrace();
ParseScriptBody(context);
context.ReadCloseBrace();
}
protected virtual void ParseProto(ParserContext context)
{
context.ReadKeyword("PROTO");
var proto = new ProtoNode {
name = ParseNodeNameId(context)
};
context.PushNodeContainer(proto.children);
context.PushFieldContainer(proto);
ParseInterfaceDeclarations(context);
if (context.ReadNextToken().Type != VRML97TokenType.OpenBrace)
{
throw new InvalidVRMLSyntaxException();
}
ParseProtoBody(context);
if (context.ReadNextToken().Type != VRML97TokenType.CloseBrace)
{
throw new InvalidVRMLSyntaxException();
}
context.PopFieldContainer();
context.PopNodeContainer();
context.RegisterPtototype(proto);
}
protected virtual void ParseNodeBodyElement(ParserContext context)
{
var node = context.FieldContainer;
if (node == null)
{
throw new Exception("Invalid context");
}
var token = context.PeekNextToken();
switch (token.Text)
{
case "ROUTE":
ParseRouteStatement(context);
break;
case "PROTO":
ParseProto(context);
break;
}
string fieldId = ParseFieldId(context);
token = context.PeekNextToken();
//TODO: get field type and parse depending on it.
switch (token.Text)
{
case "IS":
token = context.ReadNextToken();
string interfaceFieldId = ParseFieldId(context);
//TODO: Process inteface field linking
break;
default:
var field = node.GetExposedField(fieldId);
field.AcceptVisitor(_fieldParser);
break;
}
}
private void ParseRestrictedInterfaceDeclaration(ParserContext context)
{
var node = context.FieldContainer as ProtoNode;
if (node == null)
{
throw new Exception("Unexpected context");
}
var accessType = context.ReadNextToken().Text;
switch (accessType)
{
case "eventIn":
var fieldInType = ParseFieldType(context);
var eventInId = ParseEventInId(context);
//TODO: process interface eventIn declaration.
break;
case "eventOut":
var fieldOutType = ParseFieldType(context);
var eventOutId = ParseEventOutId(context);
//TODO: process interface eventOut declaration.
break;
case "field":
var fieldType = ParseFieldType(context);
var fieldId = ParseFieldId(context);
var field = context.CreateField(fieldType);
node.AddField(fieldId, field);
field.AcceptVisitor(_fieldParser);
//TODO: process interface field declaration.
break;
default:
throw new Exception("Unexpected context");
}
}
protected virtual void ParseScriptBodyElement(ParserContext context)
{
var token = context.PeekNextToken();
VRML97Token tokenIs = null;
string fieldType;
switch (token.Text)
{
case "eventIn":
tokenIs = context.PeekNextToken(3);
if (tokenIs.Text == "IS")
{
token = context.ReadNextToken();
fieldType = ParseFieldType(context);
string eventInId1 = ParseEventInId(context);
tokenIs = context.ReadNextToken();
string eventInId2 = ParseEventInId(context);
//TODO: process scipt eventIn element
}
else
{
ParseRestrictedInterfaceDeclaration(context);
}
break;
case "eventOut":
tokenIs = context.PeekNextToken(3);
if (tokenIs.Text == "IS")
{
token = context.ReadNextToken();
fieldType = ParseFieldType(context);
string eventOutId1 = ParseEventOutId(context);
tokenIs = context.ReadNextToken();
string eventOutId2 = ParseEventOutId(context);
//TODO: process scipt eventOut element
}
else
{
ParseRestrictedInterfaceDeclaration(context);
}
break;
case "field":
tokenIs = context.PeekNextToken(3);
if (tokenIs.Text == "IS")
{
token = context.ReadNextToken();
fieldType = ParseFieldType(context);
string fieldId1 = ParseFieldId(context);
tokenIs = context.ReadNextToken();
string fieldId2 = ParseFieldId(context);
//TODO: process scipt field element
}
else
{
ParseRestrictedInterfaceDeclaration(context);
}
break;
default:
if (token.Type == VRML97TokenType.Word)
{
ParseNodeBodyElement(context);
}
else
{
throw new Exception("Unexpected context");
}
break;
}
}
protected virtual void ParseDefNodeStatement(ParserContext context)
{
context.ReadNextToken();
context.NodeName = ParseNodeNameId(context);
ParseNode(context);
}
protected virtual void ParseProto(ParserContext context) {
context.ReadKeyword("PROTO");
var proto = new ProtoNode {
name = ParseNodeNameId(context)
};
context.PushNodeContainer(proto.children);
context.PushFieldContainer(proto);
ParseInterfaceDeclarations(context);
if (context.ReadNextToken().Type != VRML97TokenType.OpenBrace) {
throw new InvalidVRMLSyntaxException();
}
ParseProtoBody(context);
if (context.ReadNextToken().Type != VRML97TokenType.CloseBrace) {
throw new InvalidVRMLSyntaxException();
}
context.PopFieldContainer();
context.PopNodeContainer();
context.RegisterPtototype(proto);
}
private static string ParseId(ParserContext context) {
return context.ReadNextToken().Text;
}
protected virtual void ParseNodeBodyElement(ParserContext context) {
var node = context.FieldContainer;
if (node == null) {
throw new Exception("Invalid context");
}
var token = context.PeekNextToken();
switch (token.Text) {
case "ROUTE":
ParseRouteStatement(context);
break;
case "PROTO":
ParseProto(context);
break;
}
string fieldId = ParseFieldId(context);
token = context.PeekNextToken();
//TODO: get field type and parse depending on it.
switch (token.Text) {
case "IS":
token = context.ReadNextToken();
string interfaceFieldId = ParseFieldId(context);
//TODO: Process inteface field linking
break;
default:
var field = node.GetExposedField(fieldId);
field.AcceptVisitor(_fieldParser);
break;
}
}
protected virtual void ParseScriptBodyElement(ParserContext context) {
var token = context.PeekNextToken();
VRML97Token tokenIs = null;
string fieldType;
switch (token.Text) {
case "eventIn":
tokenIs = context.PeekNextToken(3);
if (tokenIs.Text == "IS") {
token = context.ReadNextToken();
fieldType = ParseFieldType(context);
string eventInId1 = ParseEventInId(context);
tokenIs = context.ReadNextToken();
string eventInId2 = ParseEventInId(context);
//TODO: process scipt eventIn element
} else {
ParseRestrictedInterfaceDeclaration(context);
}
break;
case "eventOut":
tokenIs = context.PeekNextToken(3);
if (tokenIs.Text == "IS") {
token = context.ReadNextToken();
fieldType = ParseFieldType(context);
string eventOutId1 = ParseEventOutId(context);
tokenIs = context.ReadNextToken();
string eventOutId2 = ParseEventOutId(context);
//TODO: process scipt eventOut element
} else {
ParseRestrictedInterfaceDeclaration(context);
}
break;
case "field":
tokenIs = context.PeekNextToken(3);
if (tokenIs.Text == "IS") {
token = context.ReadNextToken();
fieldType = ParseFieldType(context);
string fieldId1 = ParseFieldId(context);
tokenIs = context.ReadNextToken();
string fieldId2 = ParseFieldId(context);
//TODO: process scipt field element
} else {
ParseRestrictedInterfaceDeclaration(context);
}
break;
default:
if (token.Type == VRML97TokenType.Word) {
ParseNodeBodyElement(context);
} else {
throw new Exception("Unexpected context");
}
break;
}
}
protected virtual void ParseNode(ParserContext context) {
var token = context.PeekNextToken();
if (token.Type == VRML97TokenType.EOF) return;
switch (token.Text) {
case "Script":
ParseScriptNode(context);
break;
default:
var nodeTypeId = ParseNodeTypeId(context);
var node = context.CreateNode(nodeTypeId, context.NodeName);
context.NodeName = null;
context.PushFieldContainer(node);
if (context.ReadNextToken().Type != VRML97TokenType.OpenBrace) {
throw new InvalidVRMLSyntaxException("Open brace expected");
}
ParseNodeBody(context);
if (context.ReadNextToken().Type != VRML97TokenType.CloseBrace) {
throw new InvalidVRMLSyntaxException();
}
context.PopFieldContainer();
context.AcceptChild(node);
break;
}
}
protected virtual void ParseScriptNode(ParserContext context) {
var keyword = context.ReadNextToken();
if (keyword.Text != "Script") {
throw new InvalidVRMLSyntaxException("Script expected");
}
context.ReadOpenBrace();
ParseScriptBody(context);
context.ReadCloseBrace();
}
private void ParseRestrictedInterfaceDeclaration(ParserContext context) {
var node = context.FieldContainer as ProtoNode;
if (node == null) throw new Exception("Unexpected context");
var accessType = context.ReadNextToken().Text;
switch (accessType) {
case "eventIn":
var fieldInType = ParseFieldType(context);
var eventInId = ParseEventInId(context);
//TODO: process interface eventIn declaration.
break;
case "eventOut":
var fieldOutType = ParseFieldType(context);
var eventOutId = ParseEventOutId(context);
//TODO: process interface eventOut declaration.
break;
case "field":
var fieldType = ParseFieldType(context);
var fieldId = ParseFieldId(context);
var field = context.CreateField(fieldType);
node.AddField(fieldId, field);
field.AcceptVisitor(_fieldParser);
//TODO: process interface field declaration.
break;
default:
throw new Exception("Unexpected context");
}
}
private static string ParseId(ParserContext context)
{
return(context.ReadNextToken().Text);
}
protected virtual void ParseDefNodeStatement(ParserContext context) {
context.ReadNextToken();
context.NodeName = ParseNodeNameId(context);
ParseNode(context);
}