X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/b37bf2e156556c589aea3e1f58a377f2b1189665..ed1e77d3adeb83d26fd1dfb16dd84cabdcefd250:/API/JSCallbackObjectFunctions.h

diff --git a/API/JSCallbackObjectFunctions.h b/API/JSCallbackObjectFunctions.h
index f987dd8..280fa40 100644
--- a/API/JSCallbackObjectFunctions.h
+++ b/API/JSCallbackObjectFunctions.h
@@ -1,6 +1,5 @@
-// -*- mode: c++; c-basic-offset: 4 -*-
 /*
- * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -12,10 +11,10 @@
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
@@ -25,45 +24,90 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-#include <wtf/Platform.h>
 #include "APICast.h"
+#include "Error.h"
+#include "ExceptionHelpers.h"
 #include "JSCallbackFunction.h"
 #include "JSClassRef.h"
-#include "JSObjectRef.h"
+#include "JSFunction.h"
 #include "JSGlobalObject.h"
+#include "JSLock.h"
+#include "JSObjectRef.h"
+#include "JSString.h"
 #include "JSStringRef.h"
+#include "OpaqueJSString.h"
 #include "PropertyNameArray.h"
-#include "internal.h"
 #include <wtf/Vector.h>
 
-namespace KJS {
+namespace JSC {
+
+template <class Parent>
+inline JSCallbackObject<Parent>* JSCallbackObject<Parent>::asCallbackObject(JSValue value)
+{
+    ASSERT(asObject(value)->inherits(info()));
+    return jsCast<JSCallbackObject*>(asObject(value));
+}
 
-template <class Base>
-JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, JSClassRef jsClass, JSValue* prototype, void* data)
-    : Base(prototype)
-    , m_privateData(data)
-    , m_class(JSClassRetain(jsClass))
+template <class Parent>
+inline JSCallbackObject<Parent>* JSCallbackObject<Parent>::asCallbackObject(EncodedJSValue value)
 {
+    ASSERT(asObject(JSValue::decode(value))->inherits(info()));
+    return jsCast<JSCallbackObject*>(asObject(JSValue::decode(value)));
+}
+
+template <class Parent>
+JSCallbackObject<Parent>::JSCallbackObject(ExecState* exec, Structure* structure, JSClassRef jsClass, void* data)
+    : Parent(exec->vm(), structure)
+    , m_callbackObjectData(std::make_unique<JSCallbackObjectData>(data, jsClass))
+{
+}
+
+extern const GlobalObjectMethodTable javaScriptCoreAPIGlobalObjectMethodTable;
+
+// Global object constructor.
+// FIXME: Move this into a separate JSGlobalCallbackObject class derived from this one.
+template <class Parent>
+JSCallbackObject<Parent>::JSCallbackObject(VM& vm, JSClassRef jsClass, Structure* structure)
+    : Parent(vm, structure, &javaScriptCoreAPIGlobalObjectMethodTable)
+    , m_callbackObjectData(std::make_unique<JSCallbackObjectData>(nullptr, jsClass))
+{
+}
+
+template <class Parent>
+JSCallbackObject<Parent>::~JSCallbackObject()
+{
+    JSObjectRef thisRef = toRef(static_cast<JSObject*>(this));
+    for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+        if (JSObjectFinalizeCallback finalize = jsClass->finalize)
+            finalize(thisRef);
+    }
+}
+    
+template <class Parent>
+void JSCallbackObject<Parent>::finishCreation(ExecState* exec)
+{
+    Base::finishCreation(exec->vm());
+    ASSERT(Parent::inherits(info()));
     init(exec);
 }
 
-// Global object constructor. FIXME: Move this into a JSGlobalCallbackObject subclass.
-template <class Base>
-JSCallbackObject<Base>::JSCallbackObject(JSClassRef jsClass)
-    : m_privateData(0)
-    , m_class(JSClassRetain(jsClass))
+// This is just for Global object, so we can assume that Base::finishCreation is JSGlobalObject::finishCreation.
+template <class Parent>
+void JSCallbackObject<Parent>::finishCreation(VM& vm)
 {
-    ASSERT(Base::isGlobalObject());
-    init(static_cast<JSGlobalObject*>(this)->globalExec());
+    ASSERT(Parent::inherits(info()));
+    ASSERT(Parent::isGlobalObject());
+    Base::finishCreation(vm);
+    init(jsCast<JSGlobalObject*>(this)->globalExec());
 }
 
-template <class Base>
-void JSCallbackObject<Base>::init(ExecState* exec)
+template <class Parent>
+void JSCallbackObject<Parent>::init(ExecState* exec)
 {
     ASSERT(exec);
     
     Vector<JSObjectInitializeCallback, 16> initRoutines;
-    JSClassRef jsClass = m_class;
+    JSClassRef jsClass = classRef();
     do {
         if (JSObjectInitializeCallback initialize = jsClass->initialize)
             initRoutines.append(initialize);
@@ -71,425 +115,550 @@ void JSCallbackObject<Base>::init(ExecState* exec)
     
     // initialize from base to derived
     for (int i = static_cast<int>(initRoutines.size()) - 1; i >= 0; i--) {
-        JSLock::DropAllLocks dropAllLocks;
+        JSLock::DropAllLocks dropAllLocks(exec);
         JSObjectInitializeCallback initialize = initRoutines[i];
         initialize(toRef(exec), toRef(this));
     }
 }
 
-template <class Base>
-JSCallbackObject<Base>::~JSCallbackObject()
+template <class Parent>
+String JSCallbackObject<Parent>::className(const JSObject* object)
 {
-    JSObjectRef thisRef = toRef(this);
+    const JSCallbackObject* thisObject = jsCast<const JSCallbackObject*>(object);
+    String thisClassName = thisObject->classRef()->className();
+    if (!thisClassName.isEmpty())
+        return thisClassName;
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
-        if (JSObjectFinalizeCallback finalize = jsClass->finalize) {
-            finalize(thisRef);
-        }
-            
-    JSClassRelease(m_class);
-}
-
-template <class Base>
-UString JSCallbackObject<Base>::className() const
-{
-    if (!m_class->className.isNull())
-        return m_class->className;
-    
-    return Base::className();
+    return Parent::className(object);
 }
 
-template <class Base>
-bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
+template <class Parent>
+bool JSCallbackObject<Parent>::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
 {
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(object);
     JSContextRef ctx = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
-    JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
+    JSObjectRef thisRef = toRef(thisObject);
+    RefPtr<OpaqueJSString> propertyNameRef;
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
-        // optional optimization to bypass getProperty in cases when we only need to know if the property exists
-        if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (hasProperty(ctx, thisRef, propertyNameRef)) {
-                slot.setCustom(this, callbackGetter);
-                return true;
+    if (StringImpl* name = propertyName.uid()) {
+        for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
+            // optional optimization to bypass getProperty in cases when we only need to know if the property exists
+            if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
+                if (!propertyNameRef)
+                    propertyNameRef = OpaqueJSString::create(name);
+                JSLock::DropAllLocks dropAllLocks(exec);
+                if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
+                    slot.setCustom(thisObject, ReadOnly | DontEnum, callbackGetter);
+                    return true;
+                }
+            } else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
+                if (!propertyNameRef)
+                    propertyNameRef = OpaqueJSString::create(name);
+                JSValueRef exception = 0;
+                JSValueRef value;
+                {
+                    JSLock::DropAllLocks dropAllLocks(exec);
+                    value = getProperty(ctx, thisRef, propertyNameRef.get(), &exception);
+                }
+                if (exception) {
+                    exec->vm().throwException(exec, toJS(exec, exception));
+                    slot.setValue(thisObject, ReadOnly | DontEnum, jsUndefined());
+                    return true;
+                }
+                if (value) {
+                    slot.setValue(thisObject, ReadOnly | DontEnum, toJS(exec, value));
+                    return true;
+                }
             }
-        } else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (JSValueRef value = getProperty(ctx, thisRef, propertyNameRef, toRef(exec->exceptionSlot()))) {
-                // cache the value so we don't have to compute it again
-                // FIXME: This violates the PropertySlot design a little bit.
-                // We should either use this optimization everywhere, or nowhere.
-                slot.setCustom(reinterpret_cast<JSObject*>(toJS(value)), cachedValueGetter);
-                return true;
+            
+            if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+                if (staticValues->contains(name)) {
+                    JSValue value = thisObject->getStaticValue(exec, propertyName);
+                    if (value) {
+                        slot.setValue(thisObject, ReadOnly | DontEnum, value);
+                        return true;
+                    }
+                }
             }
-        }
-        
-        if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
-            if (staticValues->contains(propertyName.ustring().rep())) {
-                slot.setCustom(this, staticValueGetter);
-                return true;
+            
+            if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+                if (staticFunctions->contains(name)) {
+                    slot.setCustom(thisObject, ReadOnly | DontEnum, staticFunctionGetter);
+                    return true;
+                }
             }
         }
-        
-        if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
-            if (staticFunctions->contains(propertyName.ustring().rep())) {
-                slot.setCustom(this, staticFunctionGetter);
-                return true;
+    }
+
+    return Parent::getOwnPropertySlot(thisObject, exec, propertyName, slot);
+}
+
+template <class Parent>
+bool JSCallbackObject<Parent>::getOwnPropertySlotByIndex(JSObject* object, ExecState* exec, unsigned propertyName, PropertySlot& slot)
+{
+    return object->methodTable()->getOwnPropertySlot(object, exec, Identifier::from(exec, propertyName), slot);
+}
+
+template <class Parent>
+JSValue JSCallbackObject<Parent>::defaultValue(const JSObject* object, ExecState* exec, PreferredPrimitiveType hint)
+{
+    const JSCallbackObject* thisObject = jsCast<const JSCallbackObject*>(object);
+    JSContextRef ctx = toRef(exec);
+    JSObjectRef thisRef = toRef(thisObject);
+    ::JSType jsHint = hint == PreferString ? kJSTypeString : kJSTypeNumber;
+
+    for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
+        if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
+            JSValueRef exception = 0;
+            JSValueRef result = convertToType(ctx, thisRef, jsHint, &exception);
+            if (exception) {
+                exec->vm().throwException(exec, toJS(exec, exception));
+                return jsUndefined();
             }
+            if (result)
+                return toJS(exec, result);
         }
     }
     
-    return Base::getOwnPropertySlot(exec, propertyName, slot);
+    return Parent::defaultValue(object, exec, hint);
 }
 
-template <class Base>
-bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
+template <class Parent>
+void JSCallbackObject<Parent>::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
 {
-    return getOwnPropertySlot(exec, Identifier::from(propertyName), slot);
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
+    JSContextRef ctx = toRef(exec);
+    JSObjectRef thisRef = toRef(thisObject);
+    RefPtr<OpaqueJSString> propertyNameRef;
+    JSValueRef valueRef = toRef(exec, value);
+    
+    if (StringImpl* name = propertyName.uid()) {
+        for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
+            if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
+                if (!propertyNameRef)
+                    propertyNameRef = OpaqueJSString::create(name);
+                JSValueRef exception = 0;
+                bool result;
+                {
+                    JSLock::DropAllLocks dropAllLocks(exec);
+                    result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
+                }
+                if (exception)
+                    exec->vm().throwException(exec, toJS(exec, exception));
+                if (result || exception)
+                    return;
+            }
+            
+            if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+                if (StaticValueEntry* entry = staticValues->get(name)) {
+                    if (entry->attributes & kJSPropertyAttributeReadOnly)
+                        return;
+                    if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
+                        JSValueRef exception = 0;
+                        bool result;
+                        {
+                            JSLock::DropAllLocks dropAllLocks(exec);
+                            result = setProperty(ctx, thisRef, entry->propertyNameRef.get(), valueRef, &exception);
+                        }
+                        if (exception)
+                            exec->vm().throwException(exec, toJS(exec, exception));
+                        if (result || exception)
+                            return;
+                    }
+                }
+            }
+            
+            if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+                if (StaticFunctionEntry* entry = staticFunctions->get(name)) {
+                    PropertySlot getSlot(thisObject);
+                    if (Parent::getOwnPropertySlot(thisObject, exec, propertyName, getSlot))
+                        return Parent::put(thisObject, exec, propertyName, value, slot);
+                    if (entry->attributes & kJSPropertyAttributeReadOnly)
+                        return;
+                    thisObject->JSCallbackObject<Parent>::putDirect(exec->vm(), propertyName, value); // put as override property
+                    return;
+                }
+            }
+        }
+    }
+
+    return Parent::put(thisObject, exec, propertyName, value, slot);
 }
 
-template <class Base>
-void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName, JSValue* value, int attr)
+template <class Parent>
+void JSCallbackObject<Parent>::putByIndex(JSCell* cell, ExecState* exec, unsigned propertyIndex, JSValue value, bool shouldThrow)
 {
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
     JSContextRef ctx = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
-    JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
-    JSValueRef valueRef = toRef(value);
-    
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
+    JSObjectRef thisRef = toRef(thisObject);
+    RefPtr<OpaqueJSString> propertyNameRef;
+    JSValueRef valueRef = toRef(exec, value);
+    Identifier propertyName = Identifier::from(exec, propertyIndex);
+
+    for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (setProperty(ctx, thisRef, propertyNameRef, valueRef, toRef(exec->exceptionSlot())))
+            if (!propertyNameRef)
+                propertyNameRef = OpaqueJSString::create(propertyName.impl());
+            JSValueRef exception = 0;
+            bool result;
+            {
+                JSLock::DropAllLocks dropAllLocks(exec);
+                result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
+            }
+            if (exception)
+                exec->vm().throwException(exec, toJS(exec, exception));
+            if (result || exception)
                 return;
         }
-        
-        if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
-            if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep())) {
+
+        if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+            if (StaticValueEntry* entry = staticValues->get(propertyName.impl())) {
                 if (entry->attributes & kJSPropertyAttributeReadOnly)
                     return;
                 if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
-                    JSLock::DropAllLocks dropAllLocks;
-                    if (setProperty(ctx, thisRef, propertyNameRef, valueRef, toRef(exec->exceptionSlot())))
+                    JSValueRef exception = 0;
+                    bool result;
+                    {
+                        JSLock::DropAllLocks dropAllLocks(exec);
+                        result = setProperty(ctx, thisRef, entry->propertyNameRef.get(), valueRef, &exception);
+                    }
+                    if (exception)
+                        exec->vm().throwException(exec, toJS(exec, exception));
+                    if (result || exception)
                         return;
-                } else
-                    throwError(exec, ReferenceError, "Attempt to set a property that is not settable.");
+                }
             }
         }
-        
-        if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
-            if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
+
+        if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+            if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.impl())) {
                 if (entry->attributes & kJSPropertyAttributeReadOnly)
                     return;
-                JSCallbackObject<Base>::putDirect(propertyName, value, attr); // put as override property
-                return;
+                break;
             }
         }
     }
-    
-    return Base::put(exec, propertyName, value, attr);
-}
 
-template <class Base>
-void JSCallbackObject<Base>::put(ExecState* exec, unsigned propertyName, JSValue* value, int attr)
-{
-    return put(exec, Identifier::from(propertyName), value, attr);
+    return Parent::putByIndex(thisObject, exec, propertyIndex, value, shouldThrow);
 }
 
-template <class Base>
-bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& propertyName)
+template <class Parent>
+bool JSCallbackObject<Parent>::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
 {
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
     JSContextRef ctx = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
-    JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
+    JSObjectRef thisRef = toRef(thisObject);
+    RefPtr<OpaqueJSString> propertyNameRef;
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
-        if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (deleteProperty(ctx, thisRef, propertyNameRef, toRef(exec->exceptionSlot())))
-                return true;
-        }
-        
-        if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
-            if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep())) {
-                if (entry->attributes & kJSPropertyAttributeDontDelete)
-                    return false;
-                return true;
+    if (StringImpl* name = propertyName.uid()) {
+        for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
+            if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
+                if (!propertyNameRef)
+                    propertyNameRef = OpaqueJSString::create(name);
+                JSValueRef exception = 0;
+                bool result;
+                {
+                    JSLock::DropAllLocks dropAllLocks(exec);
+                    result = deleteProperty(ctx, thisRef, propertyNameRef.get(), &exception);
+                }
+                if (exception)
+                    exec->vm().throwException(exec, toJS(exec, exception));
+                if (result || exception)
+                    return true;
             }
-        }
-        
-        if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
-            if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
-                if (entry->attributes & kJSPropertyAttributeDontDelete)
-                    return false;
-                return true;
+            
+            if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+                if (StaticValueEntry* entry = staticValues->get(name)) {
+                    if (entry->attributes & kJSPropertyAttributeDontDelete)
+                        return false;
+                    return true;
+                }
+            }
+            
+            if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+                if (StaticFunctionEntry* entry = staticFunctions->get(name)) {
+                    if (entry->attributes & kJSPropertyAttributeDontDelete)
+                        return false;
+                    return true;
+                }
             }
         }
     }
-    
-    return Base::deleteProperty(exec, propertyName);
+
+    return Parent::deleteProperty(thisObject, exec, propertyName);
 }
 
-template <class Base>
-bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, unsigned propertyName)
+template <class Parent>
+bool JSCallbackObject<Parent>::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned propertyName)
 {
-    return deleteProperty(exec, Identifier::from(propertyName));
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
+    return thisObject->methodTable()->deleteProperty(thisObject, exec, Identifier::from(exec, propertyName));
 }
 
-template <class Base>
-bool JSCallbackObject<Base>::implementsConstruct() const
+template <class Parent>
+ConstructType JSCallbackObject<Parent>::getConstructData(JSCell* cell, ConstructData& constructData)
 {
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
-        if (jsClass->callAsConstructor)
-            return true;
-    
-    return false;
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
+    for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
+        if (jsClass->callAsConstructor) {
+            constructData.native.function = construct;
+            return ConstructTypeHost;
+        }
+    }
+    return ConstructTypeNone;
 }
 
-template <class Base>
-JSObject* JSCallbackObject<Base>::construct(ExecState* exec, const List& args)
+template <class Parent>
+EncodedJSValue JSCallbackObject<Parent>::construct(ExecState* exec)
 {
+    JSObject* constructor = exec->callee();
     JSContextRef execRef = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
+    JSObjectRef constructorRef = toRef(constructor);
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
+    for (JSClassRef jsClass = jsCast<JSCallbackObject<Parent>*>(constructor)->classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectCallAsConstructorCallback callAsConstructor = jsClass->callAsConstructor) {
-            int argumentCount = static_cast<int>(args.size());
-            Vector<JSValueRef, 16> arguments(argumentCount);
-            for (int i = 0; i < argumentCount; i++)
-                arguments[i] = toRef(args[i]);
-            JSLock::DropAllLocks dropAllLocks;
-            return toJS(callAsConstructor(execRef, thisRef, argumentCount, arguments.data(), toRef(exec->exceptionSlot())));
+            size_t argumentCount = exec->argumentCount();
+            Vector<JSValueRef, 16> arguments;
+            arguments.reserveInitialCapacity(argumentCount);
+            for (size_t i = 0; i < argumentCount; ++i)
+                arguments.uncheckedAppend(toRef(exec, exec->uncheckedArgument(i)));
+            JSValueRef exception = 0;
+            JSObject* result;
+            {
+                JSLock::DropAllLocks dropAllLocks(exec);
+                result = toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), &exception));
+            }
+            if (exception)
+                exec->vm().throwException(exec, toJS(exec, exception));
+            return JSValue::encode(result);
         }
     }
     
-    ASSERT(0); // implementsConstruct should prevent us from reaching here
-    return 0;
+    RELEASE_ASSERT_NOT_REACHED(); // getConstructData should prevent us from reaching here
+    return JSValue::encode(JSValue());
 }
 
-template <class Base>
-bool JSCallbackObject<Base>::implementsHasInstance() const
-{
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
-        if (jsClass->hasInstance)
-            return true;
-    
-    return false;
-}
-
-template <class Base>
-bool JSCallbackObject<Base>::hasInstance(ExecState *exec, JSValue *value)
+template <class Parent>
+bool JSCallbackObject<Parent>::customHasInstance(JSObject* object, ExecState* exec, JSValue value)
 {
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(object);
     JSContextRef execRef = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
+    JSObjectRef thisRef = toRef(thisObject);
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
+    for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance) {
-            JSLock::DropAllLocks dropAllLocks;
-            return hasInstance(execRef, thisRef, toRef(value), toRef(exec->exceptionSlot()));
+            JSValueRef valueRef = toRef(exec, value);
+            JSValueRef exception = 0;
+            bool result;
+            {
+                JSLock::DropAllLocks dropAllLocks(exec);
+                result = hasInstance(execRef, thisRef, valueRef, &exception);
+            }
+            if (exception)
+                exec->vm().throwException(exec, toJS(exec, exception));
+            return result;
         }
-            
-    ASSERT_NOT_REACHED(); // implementsHasInstance should prevent us from reaching here
-    return 0;
+    }
+    return false;
 }
 
-
-template <class Base>
-bool JSCallbackObject<Base>::implementsCall() const
+template <class Parent>
+CallType JSCallbackObject<Parent>::getCallData(JSCell* cell, CallData& callData)
 {
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
-        if (jsClass->callAsFunction)
-            return true;
-    
-    return false;
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
+    for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
+        if (jsClass->callAsFunction) {
+            callData.native.function = call;
+            return CallTypeHost;
+        }
+    }
+    return CallTypeNone;
 }
 
-template <class Base>
-JSValue* JSCallbackObject<Base>::callAsFunction(ExecState* exec, JSObject* thisObj, const List &args)
+template <class Parent>
+EncodedJSValue JSCallbackObject<Parent>::call(ExecState* exec)
 {
     JSContextRef execRef = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
-    JSObjectRef thisObjRef = toRef(thisObj);
+    JSObjectRef functionRef = toRef(exec->callee());
+    JSObjectRef thisObjRef = toRef(jsCast<JSObject*>(exec->thisValue().toThis(exec, NotStrictMode)));
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
+    for (JSClassRef jsClass = jsCast<JSCallbackObject<Parent>*>(toJS(functionRef))->classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectCallAsFunctionCallback callAsFunction = jsClass->callAsFunction) {
-            int argumentCount = static_cast<int>(args.size());
-            Vector<JSValueRef, 16> arguments(argumentCount);
-            for (int i = 0; i < argumentCount; i++)
-                arguments[i] = toRef(args[i]);
-            JSLock::DropAllLocks dropAllLocks;
-            return toJS(callAsFunction(execRef, thisRef, thisObjRef, argumentCount, arguments.data(), toRef(exec->exceptionSlot())));
+            size_t argumentCount = exec->argumentCount();
+            Vector<JSValueRef, 16> arguments;
+            arguments.reserveInitialCapacity(argumentCount);
+            for (size_t i = 0; i < argumentCount; ++i)
+                arguments.uncheckedAppend(toRef(exec, exec->uncheckedArgument(i)));
+            JSValueRef exception = 0;
+            JSValue result;
+            {
+                JSLock::DropAllLocks dropAllLocks(exec);
+                result = toJS(exec, callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception));
+            }
+            if (exception)
+                exec->vm().throwException(exec, toJS(exec, exception));
+            return JSValue::encode(result);
         }
     }
     
-    ASSERT_NOT_REACHED(); // implementsCall should prevent us from reaching here
-    return 0;
+    RELEASE_ASSERT_NOT_REACHED(); // getCallData should prevent us from reaching here
+    return JSValue::encode(JSValue());
 }
 
-template <class Base>
-void JSCallbackObject<Base>::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
+template <class Parent>
+void JSCallbackObject<Parent>::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
+    JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(object);
     JSContextRef execRef = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
+    JSObjectRef thisRef = toRef(thisObject);
     
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
+    for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {
-            JSLock::DropAllLocks dropAllLocks;
+            JSLock::DropAllLocks dropAllLocks(exec);
             getPropertyNames(execRef, thisRef, toRef(&propertyNames));
         }
         
-        if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
-            typedef OpaqueJSClass::StaticValuesTable::const_iterator iterator;
+        if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+            typedef OpaqueJSClassStaticValuesTable::const_iterator iterator;
             iterator end = staticValues->end();
             for (iterator it = staticValues->begin(); it != end; ++it) {
-                UString::Rep* name = it->first.get();
-                StaticValueEntry* entry = it->second;
-                if (entry->getProperty && !(entry->attributes & kJSPropertyAttributeDontEnum))
-                    propertyNames.add(Identifier(name));
+                StringImpl* name = it->key.get();
+                StaticValueEntry* entry = it->value.get();
+                if (entry->getProperty && (!(entry->attributes & kJSPropertyAttributeDontEnum) || mode.includeDontEnumProperties())) {
+                    ASSERT(!name->isSymbol());
+                    propertyNames.add(Identifier::fromString(exec, String(name)));
+                }
             }
         }
         
-        if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
-            typedef OpaqueJSClass::StaticFunctionsTable::const_iterator iterator;
+        if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+            typedef OpaqueJSClassStaticFunctionsTable::const_iterator iterator;
             iterator end = staticFunctions->end();
             for (iterator it = staticFunctions->begin(); it != end; ++it) {
-                UString::Rep* name = it->first.get();
-                StaticFunctionEntry* entry = it->second;
-                if (!(entry->attributes & kJSPropertyAttributeDontEnum))
-                    propertyNames.add(Identifier(name));
+                StringImpl* name = it->key.get();
+                StaticFunctionEntry* entry = it->value.get();
+                if (!(entry->attributes & kJSPropertyAttributeDontEnum) || mode.includeDontEnumProperties()) {
+                    ASSERT(!name->isSymbol());
+                    propertyNames.add(Identifier::fromString(exec, String(name)));
+                }
             }
         }
     }
     
-    Base::getPropertyNames(exec, propertyNames);
+    Parent::getOwnNonIndexPropertyNames(thisObject, exec, propertyNames, mode);
 }
 
-template <class Base>
-double JSCallbackObject<Base>::toNumber(ExecState* exec) const
+template <class Parent>
+void JSCallbackObject<Parent>::setPrivate(void* data)
 {
-    JSContextRef ctx = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
-    
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
-        if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (JSValueRef value = convertToType(ctx, thisRef, kJSTypeNumber, toRef(exec->exceptionSlot())))
-                return toJS(value)->getNumber();
-        }
-            
-    return Base::toNumber(exec);
-}
-
-template <class Base>
-UString JSCallbackObject<Base>::toString(ExecState* exec) const
-{
-    JSContextRef ctx = toRef(exec);
-    JSObjectRef thisRef = toRef(this);
-    
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
-        if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (JSValueRef value = convertToType(ctx, thisRef, kJSTypeString, toRef(exec->exceptionSlot())))
-                return toJS(value)->getString();
-        }
-            
-    return Base::toString(exec);
+    m_callbackObjectData->privateData = data;
 }
 
-template <class Base>
-void JSCallbackObject<Base>::setPrivate(void* data)
+template <class Parent>
+void* JSCallbackObject<Parent>::getPrivate()
 {
-    m_privateData = data;
+    return m_callbackObjectData->privateData;
 }
 
-template <class Base>
-void* JSCallbackObject<Base>::getPrivate()
+template <class Parent>
+bool JSCallbackObject<Parent>::inherits(JSClassRef c) const
 {
-    return m_privateData;
-}
-
-template <class Base>
-bool JSCallbackObject<Base>::inherits(JSClassRef c) const
-{
-    for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
+    for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (jsClass == c)
             return true;
-    
+    }
     return false;
 }
 
-template <class Base>
-JSValue* JSCallbackObject<Base>::cachedValueGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot& slot)
+template <class Parent>
+JSValue JSCallbackObject<Parent>::getStaticValue(ExecState* exec, PropertyName propertyName)
 {
-    JSValue* v = slot.slotBase();
-    ASSERT(v);
-    return v;
-}
-
-template <class Base>
-JSValue* JSCallbackObject<Base>::staticValueGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot)
-{
-    ASSERT(slot.slotBase()->inherits(&JSCallbackObject::info));
-    JSCallbackObject* thisObj = static_cast<JSCallbackObject*>(slot.slotBase());
-    
-    JSObjectRef thisRef = toRef(thisObj);
-    JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
+    JSObjectRef thisRef = toRef(this);
     
-    for (JSClassRef jsClass = thisObj->m_class; jsClass; jsClass = jsClass->parentClass)
-        if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues)
-            if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep()))
-                if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
-                    JSLock::DropAllLocks dropAllLocks;
-                    if (JSValueRef value = getProperty(toRef(exec), thisRef, propertyNameRef, toRef(exec->exceptionSlot())))
-                        return toJS(value);
+    if (StringImpl* name = propertyName.uid()) {
+        for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+            if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+                if (StaticValueEntry* entry = staticValues->get(name)) {
+                    if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
+                        JSValueRef exception = 0;
+                        JSValueRef value;
+                        {
+                            JSLock::DropAllLocks dropAllLocks(exec);
+                            value = getProperty(toRef(exec), thisRef, entry->propertyNameRef.get(), &exception);
+                        }
+                        if (exception) {
+                            exec->vm().throwException(exec, toJS(exec, exception));
+                            return jsUndefined();
+                        }
+                        if (value)
+                            return toJS(exec, value);
+                    }
                 }
-                    
-    return throwError(exec, ReferenceError, "Static value property defined with NULL getProperty callback.");
+            }
+        }
+    }
+
+    return JSValue();
 }
 
-template <class Base>
-JSValue* JSCallbackObject<Base>::staticFunctionGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot)
+template <class Parent>
+EncodedJSValue JSCallbackObject<Parent>::staticFunctionGetter(ExecState* exec, JSObject* slotParent, EncodedJSValue, PropertyName propertyName)
 {
-    ASSERT(slot.slotBase()->inherits(&JSCallbackObject::info));
-    JSCallbackObject* thisObj = static_cast<JSCallbackObject*>(slot.slotBase());
+    JSCallbackObject* thisObj = asCallbackObject(slotParent);
     
     // Check for cached or override property.
-    PropertySlot slot2;
-    if (thisObj->Base::getOwnPropertySlot(exec, propertyName, slot2))
-        return slot2.getValue(exec, thisObj, propertyName);
-    
-    for (JSClassRef jsClass = thisObj->m_class; jsClass; jsClass = jsClass->parentClass) {
-        if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
-            if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
-                if (JSObjectCallAsFunctionCallback callAsFunction = entry->callAsFunction) {
-                    JSObject* o = new JSCallbackFunction(exec, callAsFunction, propertyName);
-                    thisObj->putDirect(propertyName, o, entry->attributes);
-                    return o;
+    PropertySlot slot2(thisObj);
+    if (Parent::getOwnPropertySlot(thisObj, exec, propertyName, slot2))
+        return JSValue::encode(slot2.getValue(exec, propertyName));
+
+    if (StringImpl* name = propertyName.uid()) {
+        for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass) {
+            if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+                if (StaticFunctionEntry* entry = staticFunctions->get(name)) {
+                    if (JSObjectCallAsFunctionCallback callAsFunction = entry->callAsFunction) {
+                        VM& vm = exec->vm();
+                        JSObject* o = JSCallbackFunction::create(vm, thisObj->globalObject(), callAsFunction, name);
+                        thisObj->putDirect(vm, propertyName, o, entry->attributes);
+                        return JSValue::encode(o);
+                    }
                 }
             }
         }
     }
-    
-    return throwError(exec, ReferenceError, "Static function property defined with NULL callAsFunction callback.");
+
+    return JSValue::encode(exec->vm().throwException(exec, createReferenceError(exec, ASCIILiteral("Static function property defined with NULL callAsFunction callback."))));
 }
 
-template <class Base>
-JSValue* JSCallbackObject<Base>::callbackGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot)
+template <class Parent>
+EncodedJSValue JSCallbackObject<Parent>::callbackGetter(ExecState* exec, JSObject* slotParent, EncodedJSValue, PropertyName propertyName)
 {
-    ASSERT(slot.slotBase()->inherits(&JSCallbackObject::info));
-    JSCallbackObject* thisObj = static_cast<JSCallbackObject*>(slot.slotBase());
+    JSCallbackObject* thisObj = asCallbackObject(slotParent);
     
     JSObjectRef thisRef = toRef(thisObj);
-    JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
+    RefPtr<OpaqueJSString> propertyNameRef;
     
-    for (JSClassRef jsClass = thisObj->m_class; jsClass; jsClass = jsClass->parentClass)
-        if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
-            JSLock::DropAllLocks dropAllLocks;
-            if (JSValueRef value = getProperty(toRef(exec), thisRef, propertyNameRef, toRef(exec->exceptionSlot())))
-                return toJS(value);
+    if (StringImpl* name = propertyName.uid()) {
+        for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass) {
+            if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
+                if (!propertyNameRef)
+                    propertyNameRef = OpaqueJSString::create(name);
+                JSValueRef exception = 0;
+                JSValueRef value;
+                {
+                    JSLock::DropAllLocks dropAllLocks(exec);
+                    value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
+                }
+                if (exception) {
+                    exec->vm().throwException(exec, toJS(exec, exception));
+                    return JSValue::encode(jsUndefined());
+                }
+                if (value)
+                    return JSValue::encode(toJS(exec, value));
+            }
         }
-            
-    return throwError(exec, ReferenceError, "hasProperty callback returned true for a property that doesn't exist.");
+    }
+
+    return JSValue::encode(exec->vm().throwException(exec, createReferenceError(exec, ASCIILiteral("hasProperty callback returned true for a property that doesn't exist."))));
 }
 
-} // namespace KJS
+} // namespace JSC