//////////////////////////////////////////////////////////////////////////
private ScriptScope ParseEventHandler(ref List<ScriptToken>.Enumerator TokenEnum)
{
ScriptToken Token = TokenEnum.Current;
if (Token == null) return null;
// setup handler
ScriptEventHandler Handler = new ScriptEventHandler();
Handler.Signature = Token.Value + " ";
Handler.Line = Token.OrigLine;
Handler.Filename = Token.Filename;
// setup scope
ScriptScope Scope = new ScriptScope();
Scope.Owner = Handler;
Scope.StartLine = Token.StartLine;
Scope.StartCol = Token.StartCol;
while (TokenEnum.MoveNext())
{
Token = TokenEnum.Current;
if (Token.IsComment) continue;
if (Token.IsString)
{
Handler.Signature += Token.Value;
Handler.Name = Token.Value.Trim(new char[] { '\"' });
break;
}
else return null;
}
EventHandlers.Add(Handler);
return Scope;
}
//////////////////////////////////////////////////////////////////////////
private ScriptScope ParseFunction(ref List<ScriptToken>.Enumerator TokenEnum)
{
ScriptToken Token = TokenEnum.Current;
if(Token==null) return null;
// setup function
ScriptFunction Func = new ScriptFunction();
Func.Signature = Token.Value + " ";
Func.Line = Token.OrigLine;
Func.Filename = Token.Filename;
switch(Token.Value)
{
case "function":
Func.Type = ScriptFunctionType.Function;
break;
case "method":
Func.Type = ScriptFunctionType.Method;
break;
case "external":
Func.Type = ScriptFunctionType.External;
break;
default:
Func.Type = ScriptFunctionType.Unknown;
break;
}
// setup scope
ScriptScope Scope = new ScriptScope();
Scope.Owner = Func;
Scope.StartLine = Token.StartLine;
Scope.StartCol = Token.StartCol;
bool ReadingName = true;
bool ReadingParams = false;
while (TokenEnum.MoveNext())
{
Token = TokenEnum.Current;
if (Token.IsComment) continue;
if (ReadingName)
{
if (!Token.IsIdentifier)
{
if(Func.Type==ScriptFunctionType.External)
{
Func.Signature += Token.Value + " ";
}
else return null;
}
else
{
Func.Name = Token.Value;
Func.Signature += Token.Value;
ReadingName = false;
}
}
else if(ReadingParams)
{
if (Token.IsOperator && Token.Value == ")")
{
Func.Signature += Token.Value;
break;
}
else if(Token.IsOperator && Token.Value==",")
{
Func.Signature += Token.Value + " ";
}
else
{
ScriptVariable Var = ParseVariable(ref TokenEnum, true);
if (Var == null) return null;
else
{
Func.Signature += Var.Signature;
Func.Params.Add(Var.Signature);
if(Var.Name!="") Scope.Variables.Add(Var);
// hack because of unnamed external's parameters
Token = TokenEnum.Current;
if(Token.IsOperator && Token.Value==")")
{
Func.Signature += Token.Value;
break;
}
}
}
}
else
{
if (Token.IsOperator && Token.Value == "(")
{
ReadingParams = true;
Func.Signature += Token.Value;
}
else return null;
}
}
Functions.Add(Func);
return Scope;
}
//////////////////////////////////////////////////////////////////////////
private bool Parse()
{
// cleanup
GlobalScope = new ScriptScope();
Scopes = new List<ScriptScope>();
Functions = new List<ScriptFunction>();
EventHandlers = new List<ScriptEventHandler>();
_Tokenizer = new ScriptTokenizer(Reader);
if (!_Tokenizer.GetTokens()) return false;
ScriptScope CurrentScope = GlobalScope;
bool ReadingBlock = false;
int BlockNest = 0;
List<ScriptToken>.Enumerator TokenEnum = _Tokenizer.Tokens.GetEnumerator();
while(TokenEnum.MoveNext())
{
ScriptToken Token = TokenEnum.Current;
if (Token.IsComment) continue;
// functions
if (Token.IsKeyword && (Token.Value == "function" || Token.Value == "method" || Token.Value == "external"))
{
ScriptScope Scope = ParseFunction(ref TokenEnum);
if(Scope != null)
{
if(ReadingBlock)
{
CurrentScope.EndLine = Token.StartLine;
CurrentScope.EndCol = Token.StartCol;
}
CurrentScope = Scope;
Scopes.Add(Scope);
ReadingBlock = true;
BlockNest = 0;
}
}
// event handles
else if(Token.IsKeyword && Token.Value=="on")
{
ScriptScope Scope = ParseEventHandler(ref TokenEnum);
if (Scope != null)
{
if (ReadingBlock)
{
CurrentScope.EndLine = Token.StartLine;
CurrentScope.EndCol = Token.StartCol;
}
CurrentScope = Scope;
Scopes.Add(Scope);
ReadingBlock = true;
BlockNest = 0;
}
}
// variables
else if(Token.IsKeyword && (Token.Value=="var" || Token.Value=="global" || Token.Value=="const"))
{
ScriptVariable Var = ParseVariable(ref TokenEnum, false);
if(Var!=null && Var.Name!="")
{
if(ReadingBlock && BlockNest>0) CurrentScope.Variables.Add(Var);
else GlobalScope.Variables.Add(Var);
}
}
// curly braces
else if(Token.IsOperator)
{
if (Token.Value == "{" && ReadingBlock) BlockNest++;
else if(Token.Value=="}" && ReadingBlock)
{
BlockNest--;
if (BlockNest <= 0)
{
ReadingBlock = false;
CurrentScope.EndLine = Token.EndLine;
CurrentScope.EndCol = Token.EndCol;
}
}
else if(Token.Value==";" && ReadingBlock && BlockNest==0)
{
ReadingBlock = false;
CurrentScope.EndLine = Token.EndLine;
CurrentScope.EndCol = Token.EndCol;
}
}
}
return true;
}
