/// <summary>
/// Creates an instance of the given prototype.
/// </summary>
internal SObject CreateInstance(Prototype prototype, SObject[] parameters)
{
if (!prototype.IsAbstract)
return prototype.CreateInstance(_processor, parameters, true);
else
return _processor.ErrorHandler.ThrowError(ErrorType.TypeError, ErrorHandler.MESSAGE_TYPE_ABSTRACT_NO_INSTANCE);
}
internal void AddPrototype(Prototype prototype)
{
if (_prototypes.ContainsKey(prototype.Name))
_prototypes[prototype.Name] = prototype;
else
_prototypes.Add(prototype.Name, prototype);
}
/// <summary>
/// Parses an anonymous object.
/// </summary>
internal static SProtoObject Parse(ScriptProcessor processor, string source)
{
var prototype = new Prototype(LITERAL_OBJECT);
source = source.Trim();
// Format: { member1 : content1, member2 : content2 }
// Remove "{" and "}":
source = source.Remove(source.Length - 1, 1).Remove(0, 1).Trim();
if (source.Length == 0)
return prototype.CreateInstance(processor, null, false);
var index = 0;
var identifier = "";
var content = "";
SObject contentObj = null;
while (index < source.Length)
{
var nextSeperatorIndex = source.IndexOf(",", index);
if (nextSeperatorIndex == -1)
{
nextSeperatorIndex = source.Length;
}
else
{
//Let's find the correct ",":
nextSeperatorIndex = index;
var depth = 0;
StringEscapeHelper escaper = new LeftToRightStringEscapeHelper(source, nextSeperatorIndex, true);
var foundSeperator = false;
while (!foundSeperator && nextSeperatorIndex < source.Length)
{
var t = source[nextSeperatorIndex];
escaper.CheckStartAt(nextSeperatorIndex);
if (!escaper.IsString)
{
if (t == '{' || t == '[' || t == '(')
{
depth++;
}
else if (t == '}' || t == ']' || t == ')')
{
depth--;
}
else if (t == ',' && depth == 0)
{
foundSeperator = true;
nextSeperatorIndex--; // it adds one to the index at the end of the while loop, but we need the index where we stopped searching, so we subtract 1 here to accommodate for that.
}
}
nextSeperatorIndex++;
}
}
var member = source.Substring(index, nextSeperatorIndex - index);
if (member.Contains(":"))
{
identifier = member.Remove(member.IndexOf(":")).Trim();
content = member.Remove(0, member.IndexOf(":") + 1);
contentObj = processor.ExecuteStatement(new ScriptStatement(content));
}
else
{
identifier = member.Trim();
contentObj = processor.Undefined;
}
if (!ScriptProcessor.IsValidIdentifier(identifier))
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_MISSING_VAR_NAME);
prototype.AddMember(processor, new PrototypeMember(identifier, contentObj));
index = nextSeperatorIndex + 1;
}
return prototype.CreateInstance(processor, null, false);
}
internal new static SObject Parse(ScriptProcessor processor, string code)
{
code = code.Trim();
if (Regex.IsMatch(code, REGEX_CLASS_SIGNATURE, RegexOptions.Singleline))
{
var signature = code.Remove(code.IndexOf("{")).Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).ToList();
var extends = "";
var identifier = "";
var isAbstract = false;
// Read extends:
if (signature.Contains(CLASS_SIGNATURE_EXTENDS))
{
var extendsIndex = signature.IndexOf(CLASS_SIGNATURE_EXTENDS);
if (extendsIndex + 1 == signature.Count) // when extends is the last element in the signature, throw error:
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_CLASS_EXTENDS_MISSING);
extends = signature[extendsIndex + 1]; // The extended class name is after the "extends" keyword.
signature.RemoveAt(extendsIndex); // Remove at the extends index twice, to remove the "extends" keyword and the identifier of the extended class.
signature.RemoveAt(extendsIndex);
}
// Read abstract:
if (signature.Contains(CLASS_SIGNATURE_ABSTRACT))
{
isAbstract = true;
signature.Remove(CLASS_SIGNATURE_ABSTRACT);
}
if (signature.Count != 2) // The signature must only have "class" and the identifier left.
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_INVALID_CLASS_SIGNATURE);
// Read class name:
identifier = signature[1];
if (!ScriptProcessor.IsValidIdentifier(identifier))
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_CLASS_IDENTIFIER_MISSING);
// Create instance:
var prototype = new Prototype(identifier)
{
IsAbstract = isAbstract
};
// Handle extends:
if (extends.Length > 0)
{
if (isAbstract)
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_TYPE_ABSTRACT_NO_EXTENDS);
var extendedPrototype = processor.Context.GetPrototype(extends);
if (extendedPrototype == null)
processor.ErrorHandler.ThrowError(ErrorType.ReferenceError, ErrorHandler.MESSAGE_REFERENCE_NO_PROTOTYPE, extends);
prototype.Extends = extendedPrototype;
}
else
{
// Set default prototype:
prototype.Extends = processor.Context.GetPrototype("Object");
}
var body = code.Remove(0, code.IndexOf("{") + 1);
body = body.Remove(body.Length - 1, 1).Trim();
var additionalCtorCode = "";
var staticCtorCode = "";
var statements = StatementProcessor.GetStatements(processor, body);
for (var i = 0; i < statements.Length; i++)
{
var statement = statements[i];
if (statement.StatementType == StatementType.Var)
{
var parsed = ParseVarStatement(processor, statement);
if (parsed.Item1.Identifier == CLASS_METHOD_CTOR)
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_MISSING_VAR_NAME);
prototype.AddMember(processor, parsed.Item1);
if (parsed.Item2.Length > 0)
{
if (parsed.Item1.IsStatic)
{
staticCtorCode += string.Format(FORMAT_VAR_ASSIGNMENT, parsed.Item1.Identifier, parsed.Item2);
}
else
{
additionalCtorCode += string.Format(FORMAT_VAR_ASSIGNMENT, parsed.Item1.Identifier, parsed.Item2);
}
}
}
else if (statement.StatementType == StatementType.Function)
{
i++;
if (statements.Length > i)
{
var bodyStatement = statements[i];
var parsed = ParseFunctionStatement(processor, statement, bodyStatement);
if (parsed.Identifier == CLASS_METHOD_CTOR)
{
if (prototype.Constructor != null)
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_CLASS_DUPLICATE_DEFINITION, parsed.Identifier, identifier);
prototype.Constructor = parsed;
}
else
{
prototype.AddMember(processor, parsed);
}
}
else
{
return processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_EXPECTED_EXPRESSION, "end of script");
}
}
else
{
processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_CLASS_INVALID_STATEMENT);
}
}
// Add additional constructor code & static constructor code to prototype:
if (staticCtorCode.Length > 0)
{
prototype._staticConstructor = new SFunction(staticCtorCode, new string[] { });
prototype._staticConstructorProcessor = processor;
}
if (additionalCtorCode.Length > 0)
{
if (prototype.Constructor == null)
{
// Create new ctor if no one has been defined:
prototype.Constructor = new PrototypeMember(CLASS_METHOD_CTOR, new SFunction("", new string[] { }), false, true, false, false);
}
prototype.Constructor.ToFunction().Body = additionalCtorCode + prototype.Constructor.ToFunction().Body;
}
return prototype;
}
else
{
return processor.ErrorHandler.ThrowError(ErrorType.SyntaxError, ErrorHandler.MESSAGE_SYNTAX_INVALID_CLASS_SIGNATURE);
}
}
internal static Prototype TranslatePrototype(ScriptProcessor processor, Type t)
{
var name = t.Name;
var customNameAttribute = t.GetCustomAttribute<ScriptPrototypeAttribute>();
if (!string.IsNullOrWhiteSpace(customNameAttribute?.VariableName))
name = customNameAttribute.VariableName;
var prototype = new Prototype(name);
object typeInstance = null;
if (!t.IsAbstract)
{
typeInstance = Activator.CreateInstance(t);
}
var fields = t
.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static)
.Where(f => f.GetCustomAttribute<CompilerGeneratedAttribute>() == null)
.ToArray();
foreach (var field in fields)
{
var attributes = field.GetCustomAttributes(false);
foreach (var attr in attributes)
{
if (attr.GetType() == typeof(ScriptVariableAttribute))
{
var memberAttr = (ScriptMemberAttribute)attr;
var identifier = field.Name;
if (!string.IsNullOrEmpty(memberAttr.VariableName))
identifier = memberAttr.VariableName;
var fieldContent = field.GetValue(typeInstance);
if (fieldContent == null)
prototype.AddMember(processor, new PrototypeMember(identifier, processor.Undefined, field.IsStatic, field.IsInitOnly, false, false));
else
prototype.AddMember(processor, new PrototypeMember(identifier, Translate(processor, fieldContent), field.IsStatic, field.IsInitOnly, false, false));
}
else if (attr.GetType() == typeof(ScriptFunctionAttribute))
{
var memberAttr = (ScriptFunctionAttribute)attr;
var identifier = field.Name;
if (!string.IsNullOrEmpty(memberAttr.VariableName))
identifier = memberAttr.VariableName;
var fieldContent = field.GetValue(typeInstance);
if (fieldContent == null)
{
if (memberAttr.FunctionType != ScriptFunctionType.Standard)
throw new InvalidOperationException("A member function marked with Indexer Set, Indexer Get or Constructor has to be defined.");
prototype.AddMember(processor, new PrototypeMember(identifier, processor.Undefined, field.IsStatic, field.IsInitOnly, false, false));
}
else
{
switch (memberAttr.FunctionType)
{
case ScriptFunctionType.Standard:
prototype.AddMember(processor, new PrototypeMember(identifier, new SFunction(processor, fieldContent.ToString()), field.IsStatic, field.IsInitOnly, false, false));
break;
case ScriptFunctionType.IndexerGet:
prototype.IndexerGetFunction = new SFunction(processor, fieldContent.ToString());
break;
case ScriptFunctionType.IndexerSet:
prototype.IndexerSetFunction = new SFunction(processor, fieldContent.ToString());
break;
case ScriptFunctionType.Constructor:
prototype.Constructor = new PrototypeMember(Prototype.CLASS_METHOD_CTOR, new SFunction(processor, fieldContent.ToString()), false, true, false, false);
break;
}
}
}
}
}
var methods = t
.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static)
.Where(f => f.GetCustomAttribute<CompilerGeneratedAttribute>() == null)
.ToArray();
foreach (var method in methods)
{
var attr = method.GetCustomAttribute<ScriptFunctionAttribute>(false);
if (attr != null)
{
var identifier = method.Name;
if (!string.IsNullOrEmpty(attr.VariableName))
identifier = attr.VariableName;
if (attr.FunctionType == ScriptFunctionType.Getter)
identifier = SProtoObject.PROPERTY_GET_PREFIX + identifier;
if (attr.FunctionType == ScriptFunctionType.Setter)
identifier = SProtoObject.PROPERTY_SET_PREFIX + identifier;
Delegate methodDelegate = null;
if (method.GetParameters().Length == 3)
{
// two parameter means the method is a DotNetBuiltInMethod.
methodDelegate = (DotNetBuiltInMethod)Delegate.CreateDelegate(typeof(DotNetBuiltInMethod), method);
}
else if (method.GetParameters().Length == 4)
{
// four parameters means that the method is a valid BuiltInMethod.
methodDelegate = (BuiltInMethod)Delegate.CreateDelegate(typeof(BuiltInMethod), method);
}
switch (attr.FunctionType)
{
case ScriptFunctionType.Standard:
case ScriptFunctionType.Getter:
case ScriptFunctionType.Setter:
prototype.AddMember(processor, new PrototypeMember(identifier, new SFunction(methodDelegate), attr.IsStatic, true, false, false));
break;
case ScriptFunctionType.IndexerGet:
prototype.IndexerGetFunction = new SFunction(methodDelegate);
break;
case ScriptFunctionType.IndexerSet:
prototype.IndexerSetFunction = new SFunction(methodDelegate);
break;
case ScriptFunctionType.Constructor:
prototype.Constructor = new PrototypeMember(Prototype.CLASS_METHOD_CTOR, new SFunction(methodDelegate), false, true, false, false);
break;
}
}
}
prototype.MappedType = t;
return prototype;
}
