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 ParseStatements(ParserContext context)
{
bool validToken;
do
{
var token = context.PeekNextToken();
switch (token.Text)
{
case "DEF":
case "USE":
case "PROTO":
case "EXTERNPROTO":
case "ROUTE":
validToken = true;
ParseStatement(context);
break;
default:
if (token.Type == VRML97TokenType.Word)
{
ParseStatement(context);
validToken = true;
}
else
{
validToken = false;
}
break;
}
} while (validToken);
}
protected virtual void ParseStatement(ParserContext context)
{
var token = context.PeekNextToken();
switch (token.Text)
{
case "DEF":
case "USE":
ParseNodeStatement(context);
break;
case "PROTO":
case "EXTERNPROTO":
ParseProtoStatement(context);
break;
case "ROUTE":
ParseRouteStatement(context);
break;
default:
if (token.Type == VRML97TokenType.Word)
{
ParseNodeStatement(context);
}
else
{
throw new Exception("Unexpected context");
}
break;
}
}
public void visit(SFNode field)
{
VRML97Token token = context.PeekNextToken();
switch (token.Text)
{
case "NULL":
field.Node = null;
break;
default:
context.PushNodeContainer(field);
nodeStatementParser(context);
context.PopNodeContainer();
break;
}
}
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 ParseRootNodeStatement(ParserContext context)
{
var token = context.PeekNextToken();
switch (token.Text)
{
case "DEF":
ParseDefNodeStatement(context);
break;
default:
ParseNode(context);
break;
}
}
protected virtual void ParseNodeBody(ParserContext context)
{
var validToken = true;
do
{
var token = context.PeekNextToken();
if (token.Type == VRML97TokenType.Word)
{
ParseNodeBodyElement(context);
}
else
{
validToken = false;
}
} while (validToken);
}
protected virtual void ParseProtoStatement(ParserContext context)
{
var keyword = context.PeekNextToken();
switch (keyword.Text)
{
case "PROTO":
ParseProto(context);
break;
case "EXTERNPROTO":
ParseExternProto(context);
break;
default:
//todo: context.throw? with line number?
throw new InvalidVRMLSyntaxException("PROTO or EXTERNPROTO expected");
}
}
public virtual void ParseProtoStatements(ParserContext context)
{
var validToken = true;
do
{
var token = context.PeekNextToken();
switch (token.Text)
{
case "PROTO":
case "EXTERNPROTO":
ParseProtoStatement(context);
break;
default:
validToken = false;
break;
}
} while (validToken);
}
protected virtual void ParseNodeStatement(ParserContext context)
{
var token = context.PeekNextToken();
switch (token.Text)
{
case "DEF":
ParseDefNodeStatement(context);
break;
case "USE":
var useStatement = UseStatement.Parse(context);
var node = context.FindNode(useStatement.NodeName);
context.AcceptChild(node);
break;
default:
ParseNode(context);
break;
}
}
protected virtual void ParseStatement(ParserContext context) {
var token = context.PeekNextToken();
switch (token.Text) {
case "DEF":
case "USE":
ParseNodeStatement(context);
break;
case "PROTO":
case "EXTERNPROTO":
ParseProtoStatement(context);
break;
case "ROUTE":
ParseRouteStatement(context);
break;
default:
if (token.Type == VRML97TokenType.Word) {
ParseNodeStatement(context);
} else {
throw new Exception("Unexpected context");
}
break;
}
}
protected virtual void ParseStatements(ParserContext context) {
bool validToken;
do {
var token = context.PeekNextToken();
switch (token.Text) {
case "DEF":
case "USE":
case "PROTO":
case "EXTERNPROTO":
case "ROUTE":
validToken = true;
ParseStatement(context);
break;
default:
if (token.Type == VRML97TokenType.Word) {
ParseStatement(context);
validToken = true;
} else {
validToken = false;
}
break;
}
} while (validToken);
}
protected virtual void ParseProtoStatement(ParserContext context) {
var keyword = context.PeekNextToken();
switch (keyword.Text) {
case "PROTO":
ParseProto(context);
break;
case "EXTERNPROTO":
ParseExternProto(context);
break;
default:
//todo: context.throw? with line number?
throw new InvalidVRMLSyntaxException("PROTO or EXTERNPROTO expected");
}
}
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;
}
}
public virtual void ParseProtoStatements(ParserContext context) {
var validToken = true;
do {
var token = context.PeekNextToken();
switch (token.Text) {
case "PROTO":
case "EXTERNPROTO":
ParseProtoStatement(context);
break;
default:
validToken = false;
break;
}
} while (validToken);
}
protected virtual void ParseNodeBody(ParserContext context) {
var validToken = true;
do {
var token = context.PeekNextToken();
if (token.Type == VRML97TokenType.Word) {
ParseNodeBodyElement(context);
} else {
validToken = false;
}
} while (validToken);
}
protected virtual void ParseRootNodeStatement(ParserContext context) {
var token = context.PeekNextToken();
switch (token.Text) {
case "DEF":
ParseDefNodeStatement(context);
break;
default:
ParseNode(context);
break;
}
}
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 ParseNodeStatement(ParserContext context) {
var token = context.PeekNextToken();
switch (token.Text) {
case "DEF":
ParseDefNodeStatement(context);
break;
case "USE":
var useStatement = UseStatement.Parse(context);
var node = context.FindNode(useStatement.NodeName);
context.AcceptChild(node);
break;
default:
ParseNode(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;
}
}
