error_object.cpp
// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "value.h"
#include "object.h"
#include "types.h"
#include "interpreter.h"
#include "operations.h"
#include "error_object.h"
//#include "debugger.h"
using namespace KJS;
// ------------------------------ ErrorInstanceImp ----------------------------
const ClassInfo ErrorInstanceImp::info = {"Error", 0, 0, 0};
ErrorInstanceImp::ErrorInstanceImp(ObjectImp *proto)
: ObjectImp(proto)
{
}
// ------------------------------ ErrorPrototypeImp ----------------------------
// ECMA 15.9.4
ErrorPrototypeImp::ErrorPrototypeImp(ExecState *exec,
ObjectPrototypeImp *objectProto,
FunctionPrototypeImp *funcProto)
: ObjectImp(objectProto)
{
Value protect(this);
setInternalValue(Undefined());
// The constructor will be added later in ErrorObjectImp's constructor
put(exec, namePropertyName, String("Error"), DontEnum);
put(exec, messagePropertyName, String("Unknown error"), DontEnum);
putDirect(toStringPropertyName, new ErrorProtoFuncImp(exec,funcProto), DontEnum);
}
// ------------------------------ ErrorProtoFuncImp ----------------------------
ErrorProtoFuncImp::ErrorProtoFuncImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto)
: InternalFunctionImp(funcProto)
{
Value protect(this);
putDirect(lengthPropertyName, NumberImp::zero(), DontDelete|ReadOnly|DontEnum);
ident = "toString";
}
bool ErrorProtoFuncImp::implementsCall() const
{
return true;
}
Value ErrorProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &/*args*/)
{
// toString()
UString s = "Error";
Value v = thisObj.get(exec, namePropertyName);
if (v.type() != UndefinedType) {
s = v.toString(exec);
}
v = thisObj.get(exec, messagePropertyName);
if (v.type() != UndefinedType) {
s += ": " + v.toString(exec); // Mozilla compatible format
}
return String(s);
}
// ------------------------------ ErrorObjectImp -------------------------------
ErrorObjectImp::ErrorObjectImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
ErrorPrototypeImp *errorProto)
: InternalFunctionImp(funcProto)
{
Value protect(this);
// ECMA 15.11.3.1 Error.prototype
putDirect(prototypePropertyName, errorProto, DontEnum|DontDelete|ReadOnly);
putDirect(lengthPropertyName, NumberImp::one(), DontDelete|ReadOnly|DontEnum);
//putDirect(namePropertyName, String(n));
}
bool ErrorObjectImp::implementsConstruct() const
{
return true;
}
// ECMA 15.9.3
Object ErrorObjectImp::construct(ExecState *exec, const List &args)
{
Object proto = Object::dynamicCast(exec->lexicalInterpreter()->builtinErrorPrototype());
ObjectImp *imp = new ErrorInstanceImp(proto.imp());
Object obj(imp);
if (!args.isEmpty() && args[0].type() != UndefinedType) {
imp->putDirect(messagePropertyName, new StringImp(args[0].toString(exec)));
}
return obj;
}
bool ErrorObjectImp::implementsCall() const
{
return true;
}
// ECMA 15.9.2
Value ErrorObjectImp::call(ExecState *exec, Object &/*thisObj*/, const List &args)
{
// "Error()" gives the sames result as "new Error()"
return construct(exec,args);
}
// ------------------------------ NativeErrorPrototypeImp ----------------------
NativeErrorPrototypeImp::NativeErrorPrototypeImp(ExecState * /*exec*/, ErrorPrototypeImp *errorProto,
ErrorType et, UString name, UString message)
: ObjectImp(errorProto)
{
Value protect(this);
errType = et;
putDirect(namePropertyName, new StringImp(name), 0);
putDirect(messagePropertyName, new StringImp(message), 0);
}
// ------------------------------ NativeErrorImp -------------------------------
const ClassInfo NativeErrorImp::info = {"Function", &InternalFunctionImp::info, 0, 0};
NativeErrorImp::NativeErrorImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
const Object &prot)
: InternalFunctionImp(funcProto), proto(0)
{
Value protect(this);
proto = static_cast<ObjectImp*>(prot.imp());
putDirect(lengthPropertyName, NumberImp::one(), DontDelete|ReadOnly|DontEnum); // ECMA 15.11.7.5
putDirect(prototypePropertyName, proto, DontDelete|ReadOnly|DontEnum);
}
bool NativeErrorImp::implementsConstruct() const
{
return true;
}
Object NativeErrorImp::construct(ExecState *exec, const List &args)
{
ObjectImp *imp = new ErrorInstanceImp(proto);
Object obj(imp);
if (args[0].type() != UndefinedType)
imp->putDirect(messagePropertyName, new StringImp(args[0].toString(exec)));
return obj;
}
bool NativeErrorImp::implementsCall() const
{
return true;
}
Value NativeErrorImp::call(ExecState *exec, Object &/*thisObj*/, const List &args)
{
return construct(exec,args);
}
void NativeErrorImp::mark()
{
ObjectImp::mark();
if (proto && !proto->marked())
proto->mark();
}
KJS::Value
Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...
Definition: value.h:168
KJS::Value::type
Type type() const
Returns the type of value.
Definition: value.h:196
KJS::InternalFunctionImp
Base class for all function objects.
Definition: function.h:41
KJS::Object::get
Value get(ExecState *exec, const Identifier &propertyName) const
Retrieves the specified property from the object.
Definition: object.h:664
KJS::ExecState::lexicalInterpreter
Interpreter * lexicalInterpreter() const
Returns the interpreter associated with the current scope's global object.
Definition: interpreter.cpp:395
KJS::FunctionPrototypeImp
The initial value of Function.prototype (and thus all objects created with the Function constructor) ...
Definition: function_object.h:35
KJS::Object
Represents an Object.
Definition: object.h:82
KJS::Undefined
Represents an primitive Undefined value.
Definition: value.h:270
KJS::UString
Unicode string class.
Definition: ustring.h:189
KJS::Interpreter::builtinErrorPrototype
Object builtinErrorPrototype() const
Returns the builtin "Error.prototype" object.
Definition: interpreter.cpp:259
KJS::String
Represents an primitive String value.
Definition: value.h:341
KJS::Object::dynamicCast
static Object dynamicCast(const Value &v)
Converts a Value into an Object.
Definition: object.cpp:46
KJS::List
Native list type.
Definition: list.h:48
KJS::Value::toString
UString toString(ExecState *exec) const
Performs the ToString type conversion operation on this value (ECMA 9.8)
Definition: value.h:247
KJS::ClassInfo
Class Information.
Definition: object.h:59
KJS::List::isEmpty
bool isEmpty() const
Definition: list.h:86
KJS::ExecState
Represents the current state of script execution.
Definition: interpreter.h:439

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