4 files changed, 459 insertions, 287 deletions

diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index a045bab..739b3fc 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -54,6 +54,7 @@
 #include "TimeoutChecker.h"
 #include "JSFunction.h"
 #include "Parser.h"
+#include "PropertyNameArray.h"
 #include "Operations.h"
 
 #include "bridge/qscriptfunction_p.h"
@@ -546,11 +547,9 @@ JSC::JSValue JSC_HOST_CALL functionDisconnect(JSC::ExecState *exec, JSC::JSObjec
         if (isFunction(arg1))
             slot = arg1;
         else {
-            // ### don't go via QScriptValue
             QScript::SaveFrameHelper saveFrame(engine, exec);
-            QScriptValue tmp = engine->scriptValueFromJSCValue(arg0);
-            QString propertyName(arg1.toString(exec));
-            slot = engine->scriptValueToJSCValue(tmp.property(propertyName, QScriptValue::ResolvePrototype));
+            QString propertyName(QScriptEnginePrivate::toString(exec, arg1));
+            slot = QScriptEnginePrivate::property(exec, arg0, propertyName, QScriptValue::ResolvePrototype);
         }
     }
 
@@ -630,11 +629,9 @@ JSC::JSValue JSC_HOST_CALL functionConnect(JSC::ExecState *exec, JSC::JSObject *
         if (isFunction(arg1))
             slot = arg1;
         else {
-            // ### don't go via QScriptValue
             QScript::SaveFrameHelper saveFrame(engine, exec);
-            QScriptValue tmp = engine->scriptValueFromJSCValue(arg0);
-            QString propertyName = arg1.toString(exec);
-            slot = engine->scriptValueToJSCValue(tmp.property(propertyName, QScriptValue::ResolvePrototype));
+            QString propertyName = QScriptEnginePrivate::toString(exec, arg1);
+            slot = QScriptEnginePrivate::property(exec, arg0, propertyName, QScriptValue::ResolvePrototype);
         }
     }
 
@@ -908,22 +905,15 @@ QScriptEnginePrivate::~QScriptEnginePrivate()
     }
 }
 
-QScriptValue QScriptEnginePrivate::scriptValueFromVariant(const QVariant &v)
-{
-    QScriptValue result = create(v.userType(), v.data());
-    Q_ASSERT(result.isValid());
-    return result;
-}
-
-QVariant QScriptEnginePrivate::scriptValueToVariant(const QScriptValue &value, int targetType)
+QVariant QScriptEnginePrivate::jscValueToVariant(JSC::ExecState *exec, JSC::JSValue value, int targetType)
 {
     QVariant v(targetType, (void *)0);
-    if (QScriptEnginePrivate::convert(value, targetType, v.data(), this))
+    if (convertValue(exec, value, targetType, v.data()))
         return v;
     if (uint(targetType) == QVariant::LastType)
-        return value.toVariant();
-    if (value.isVariant()) {
-        v = value.toVariant();
+        return toVariant(exec, value);
+    if (isVariant(value)) {
+        v = variantValue(value);
         if (v.canConvert(QVariant::Type(targetType))) {
             v.convert(QVariant::Type(targetType));
             return v;
@@ -934,88 +924,61 @@ QVariant QScriptEnginePrivate::scriptValueToVariant(const QScriptValue &value, i
             return QVariant(targetType, *reinterpret_cast<void* *>(v.data()));
         }
     }
-
     return QVariant();
 }
 
-JSC::JSValue QScriptEnginePrivate::jscValueFromVariant(const QVariant &v)
-{
-    // ### it's inefficient to convert to QScriptValue and then to JSValue
-    QScriptValue vv = scriptValueFromVariant(v);
-    QScriptValuePrivate *p = QScriptValuePrivate::get(vv);
-    switch (p->type) {
-    case QScriptValuePrivate::JavaScriptCore:
-        return p->jscValue;
-    case QScriptValuePrivate::Number:
-        return JSC::jsNumber(currentFrame, p->numberValue);
-    case QScriptValuePrivate::String: {
-        JSC::UString str = p->stringValue;
-        return JSC::jsString(currentFrame, str);
-      }
-    }
-    return JSC::JSValue();
-}
-
-QVariant QScriptEnginePrivate::jscValueToVariant(JSC::JSValue value, int targetType)
+JSC::JSValue QScriptEnginePrivate::arrayFromStringList(JSC::ExecState *exec, const QStringList &lst)
 {
-    // ### it's inefficient to convert to QScriptValue and then to QVariant
-    return scriptValueToVariant(scriptValueFromJSCValue(value), targetType);
-}
-
-QScriptValue QScriptEnginePrivate::arrayFromStringList(const QStringList &lst)
-{
-    Q_Q(QScriptEngine);
-    QScriptValue arr = q->newArray(lst.size());
+    JSC::JSValue arr =  newArray(exec, lst.size());
     for (int i = 0; i < lst.size(); ++i)
-        arr.setProperty(i, QScriptValue(q, lst.at(i)));
+        setProperty(exec, arr, i, JSC::jsString(exec, lst.at(i)));
     return arr;
 }
 
-QStringList QScriptEnginePrivate::stringListFromArray(const QScriptValue &arr)
+QStringList QScriptEnginePrivate::stringListFromArray(JSC::ExecState *exec, JSC::JSValue arr)
 {
     QStringList lst;
-    uint len = arr.property(QLatin1String("length")).toUInt32();
+    uint len = toUInt32(exec, property(exec, arr, exec->propertyNames().length));
     for (uint i = 0; i < len; ++i)
-        lst.append(arr.property(i).toString());
+        lst.append(toString(exec, property(exec, arr, i)));
     return lst;
 }
 
-QScriptValue QScriptEnginePrivate::arrayFromVariantList(const QVariantList &lst)
+JSC::JSValue QScriptEnginePrivate::arrayFromVariantList(JSC::ExecState *exec, const QVariantList &lst)
 {
-    Q_Q(QScriptEngine);
-    QScriptValue arr = q->newArray(lst.size());
+    JSC::JSValue arr = newArray(exec, lst.size());
     for (int i = 0; i < lst.size(); ++i)
-        arr.setProperty(i, scriptValueFromVariant(lst.at(i)));
+        setProperty(exec, arr, i, jscValueFromVariant(exec, lst.at(i)));
     return arr;
 }
 
-QVariantList QScriptEnginePrivate::variantListFromArray(const QScriptValue &arr)
+QVariantList QScriptEnginePrivate::variantListFromArray(JSC::ExecState *exec, JSC::JSValue arr)
 {
     QVariantList lst;
-    uint len = arr.property(QLatin1String("length")).toUInt32();
+    uint len = toUInt32(exec, property(exec, arr, exec->propertyNames().length));
     for (uint i = 0; i < len; ++i)
-        lst.append(arr.property(i).toVariant());
+        lst.append(toVariant(exec, property(exec, arr, i)));
     return lst;
 }
 
-QScriptValue QScriptEnginePrivate::objectFromVariantMap(const QVariantMap &vmap)
+JSC::JSValue QScriptEnginePrivate::objectFromVariantMap(JSC::ExecState *exec, const QVariantMap &vmap)
 {
-    Q_Q(QScriptEngine);
-    QScriptValue obj = q->newObject();
+    JSC::JSValue obj = JSC::constructEmptyObject(exec);
     QVariantMap::const_iterator it;
     for (it = vmap.constBegin(); it != vmap.constEnd(); ++it)
-        obj.setProperty(it.key(), scriptValueFromVariant(it.value()));
+        setProperty(exec, obj, it.key(), jscValueFromVariant(exec, it.value()));
     return obj;
 }
 
-QVariantMap QScriptEnginePrivate::variantMapFromObject(const QScriptValue &obj)
+QVariantMap QScriptEnginePrivate::variantMapFromObject(JSC::ExecState *exec, JSC::JSValue obj)
 {
+    JSC::PropertyNameArray propertyNames(exec);
+    propertyNames.setShouldCache(false);
+    JSC::asObject(obj)->getOwnPropertyNames(exec, propertyNames, /*includeNonEnumerable=*/true);
     QVariantMap vmap;
-    QScriptValueIterator it(obj);
-    while (it.hasNext()) {
-        it.next();
-        vmap.insert(it.name(), it.value().toVariant());
-    }
+    JSC::PropertyNameArray::const_iterator it = propertyNames.begin();
+    for( ; it != propertyNames.end(); ++it)
+        vmap.insert(it->ustring(), toVariant(exec, property(exec, obj, *it)));
     return vmap;
 }
 
@@ -1344,13 +1307,13 @@ JSC::JSValue QScriptEnginePrivate::newQMetaObject(
     return result;
 }
 
-bool QScriptEnginePrivate::convertToNativeQObject(const QScriptValue &value,
+bool QScriptEnginePrivate::convertToNativeQObject(JSC::ExecState *exec, JSC::JSValue value,
                                                   const QByteArray &targetType,
                                                   void **result)
 {
     if (!targetType.endsWith('*'))
         return false;
-    if (QObject *qobject = value.toQObject()) {
+    if (QObject *qobject = toQObject(exec, value)) {
         int start = targetType.startsWith("const ") ? 6 : 0;
         QByteArray className = targetType.mid(start, targetType.size()-start-1);
         if (void *instance = qobject->qt_metacast(className)) {
@@ -1577,6 +1540,76 @@ JSC::JSValue QScriptEnginePrivate::newVariant(const QVariant &value)
     return obj;
 }
 
+JSC::JSValue QScriptEnginePrivate::newVariant(JSC::JSValue objectValue,
+                                              const QVariant &value)
+{
+    if (!isObject(objectValue))
+        return newVariant(value);
+    JSC::JSObject *jscObject = JSC::asObject(objectValue);
+    if (!jscObject->inherits(&QScriptObject::info)) {
+        qWarning("QScriptEngine::newVariant(): changing class of non-QScriptObject not supported");
+        return JSC::JSValue();
+    }
+    QScriptObject *jscScriptObject = static_cast<QScriptObject*>(jscObject);
+    if (!isVariant(objectValue)) {
+        jscScriptObject->setDelegate(new QScript::QVariantDelegate(value));
+    } else {
+        setVariantValue(objectValue, value);
+    }
+    return objectValue;
+}
+
+#ifndef QT_NO_REGEXP
+
+QRegExp QScriptEnginePrivate::toRegExp(JSC::ExecState *exec, JSC::JSValue value)
+{
+    if (!isRegExp(value))
+        return QRegExp();
+    QString pattern = toString(exec, property(exec, value, QLatin1String("source"), QScriptValue::ResolvePrototype));
+    Qt::CaseSensitivity kase = Qt::CaseSensitive;
+    if (toBool(exec, property(exec, value, QLatin1String("ignoreCase"), QScriptValue::ResolvePrototype)))
+        kase = Qt::CaseInsensitive;
+    return QRegExp(pattern, kase, QRegExp::RegExp2);
+}
+
+#endif
+
+QVariant QScriptEnginePrivate::toVariant(JSC::ExecState *exec, JSC::JSValue value)
+{
+    if (isObject(value)) {
+        if (isVariant(value))
+            return variantValue(value);
+#ifndef QT_NO_QOBJECT
+        else if (isQObject(value))
+            return qVariantFromValue(toQObject(exec, value));
+#endif
+        else if (isDate(value))
+            return QVariant(toDateTime(exec, value));
+#ifndef QT_NO_REGEXP
+        else if (isRegExp(value))
+            return QVariant(toRegExp(exec, value));
+#endif
+        else if (isArray(value))
+            return variantListFromArray(exec, value);
+        else if (QScriptDeclarativeClass *dc = declarativeClass(value))
+            return dc->toVariant(declarativeObject(value));
+        // try to convert to primitive
+        JSC::JSValue savedException;
+        saveException(exec, &savedException);
+        JSC::JSValue prim = value.toPrimitive(exec);
+        restoreException(exec, savedException);
+        if (!prim.isObject())
+            return toVariant(exec, prim);
+    } else if (value.isNumber()) {
+        return QVariant(toNumber(exec, value));
+    } else if (value.isString()) {
+        return QVariant(toString(exec, value));
+    } else if (value.isBoolean()) {
+        return QVariant(toBool(exec, value));
+    }
+    return QVariant();
+}
+
 JSC::JSValue QScriptEnginePrivate::propertyHelper(JSC::ExecState *exec, JSC::JSValue value, const JSC::Identifier &id, int resolveMode)
 {
     JSC::JSValue result;
@@ -1963,20 +1996,9 @@ QScriptValue QScriptEngine::newVariant(const QVariant &value)
 QScriptValue QScriptEngine::newVariant(const QScriptValue &object,
                                        const QVariant &value)
 {
-    if (!object.isObject())
-        return newVariant(value);
-    JSC::JSObject *jscObject = JSC::asObject(QScriptValuePrivate::get(object)->jscValue);
-    if (!jscObject->inherits(&QScriptObject::info)) {
-        qWarning("QScriptEngine::newVariant(): changing class of non-QScriptObject not supported");
-        return QScriptValue();
-    }
-    QScriptObject *jscScriptObject = static_cast<QScriptObject*>(jscObject);
-    if (!object.isVariant()) {
-        jscScriptObject->setDelegate(new QScript::QVariantDelegate(value));
-    } else {
-        QScriptValuePrivate::get(object)->setVariantValue(value);
-    }
-    return object;
+    Q_D(QScriptEngine);
+    JSC::JSValue jsObject = d->scriptValueToJSCValue(object);
+    return d->scriptValueFromJSCValue(d->newVariant(jsObject, value));
 }
 
 #ifndef QT_NO_QOBJECT
@@ -2789,128 +2811,126 @@ void QScriptEngine::setDefaultPrototype(int metaTypeId, const QScriptValue &prot
 QScriptValue QScriptEngine::create(int type, const void *ptr)
 {
     Q_D(QScriptEngine);
-    return d->create(type, ptr);
+    return d->scriptValueFromJSCValue(d->create(d->currentFrame, type, ptr));
 }
 
-QScriptValue QScriptEnginePrivate::create(int type, const void *ptr)
+JSC::JSValue QScriptEnginePrivate::create(JSC::ExecState *exec, int type, const void *ptr)
 {
-    Q_Q(QScriptEngine);
     Q_ASSERT(ptr != 0);
-    QScriptValue result;
-    QScriptTypeInfo *info = m_typeInfos.value(type);
+    JSC::JSValue result;
+    QScriptEnginePrivate *eng = exec ? QScript::scriptEngineFromExec(exec) : 0;
+    QScriptTypeInfo *info = eng ? eng->m_typeInfos.value(type) : 0;
     if (info && info->marshal) {
-        result = info->marshal(q, ptr);
+        result = eng->scriptValueToJSCValue(info->marshal(eng->q_func(), ptr));
     } else {
         // check if it's one of the types we know
         switch (QMetaType::Type(type)) {
         case QMetaType::Void:
-            return QScriptValue(q, QScriptValue::UndefinedValue);
+            return JSC::jsUndefined();
         case QMetaType::Bool:
-            return QScriptValue(q, *reinterpret_cast<const bool*>(ptr));
+            return JSC::jsBoolean(*reinterpret_cast<const bool*>(ptr));
         case QMetaType::Int:
-            return QScriptValue(q, *reinterpret_cast<const int*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const int*>(ptr));
         case QMetaType::UInt:
-            return QScriptValue(q, *reinterpret_cast<const uint*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const uint*>(ptr));
         case QMetaType::LongLong:
-            return QScriptValue(q, qsreal(*reinterpret_cast<const qlonglong*>(ptr)));
+            return JSC::jsNumber(exec, qsreal(*reinterpret_cast<const qlonglong*>(ptr)));
         case QMetaType::ULongLong:
 #if defined(Q_OS_WIN) && defined(_MSC_FULL_VER) && _MSC_FULL_VER <= 12008804
 #pragma message("** NOTE: You need the Visual Studio Processor Pack to compile support for 64bit unsigned integers.")
-            return QScriptValue(q, qsreal((qlonglong)*reinterpret_cast<const qulonglong*>(ptr)));
+            return JSC::jsNumber(exec, qsreal((qlonglong)*reinterpret_cast<const qulonglong*>(ptr)));
 #elif defined(Q_CC_MSVC) && !defined(Q_CC_MSVC_NET)
-            return QScriptValue(q, qsreal((qlonglong)*reinterpret_cast<const qulonglong*>(ptr)));
+            return JSC::jsNumber(exec, qsreal((qlonglong)*reinterpret_cast<const qulonglong*>(ptr)));
 #else
-            return QScriptValue(q, qsreal(*reinterpret_cast<const qulonglong*>(ptr)));
+            return JSC::jsNumber(exec, qsreal(*reinterpret_cast<const qulonglong*>(ptr)));
 #endif
         case QMetaType::Double:
-            return QScriptValue(q, qsreal(*reinterpret_cast<const double*>(ptr)));
+            return JSC::jsNumber(exec, qsreal(*reinterpret_cast<const double*>(ptr)));
         case QMetaType::QString:
-            return QScriptValue(q, *reinterpret_cast<const QString*>(ptr));
+            return JSC::jsString(exec, *reinterpret_cast<const QString*>(ptr));
         case QMetaType::Float:
-            return QScriptValue(q, *reinterpret_cast<const float*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const float*>(ptr));
         case QMetaType::Short:
-            return QScriptValue(q, *reinterpret_cast<const short*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const short*>(ptr));
         case QMetaType::UShort:
-            return QScriptValue(q, *reinterpret_cast<const unsigned short*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const unsigned short*>(ptr));
         case QMetaType::Char:
-            return QScriptValue(q, *reinterpret_cast<const char*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const char*>(ptr));
         case QMetaType::UChar:
-            return QScriptValue(q, *reinterpret_cast<const unsigned char*>(ptr));
+            return JSC::jsNumber(exec, *reinterpret_cast<const unsigned char*>(ptr));
         case QMetaType::QChar:
-            return QScriptValue(q, (*reinterpret_cast<const QChar*>(ptr)).unicode());
+            return JSC::jsNumber(exec, (*reinterpret_cast<const QChar*>(ptr)).unicode());
         case QMetaType::QStringList:
-            result = arrayFromStringList(*reinterpret_cast<const QStringList *>(ptr));
+            result = arrayFromStringList(exec, *reinterpret_cast<const QStringList *>(ptr));
             break;
         case QMetaType::QVariantList:
-            result = arrayFromVariantList(*reinterpret_cast<const QVariantList *>(ptr));
+            result = arrayFromVariantList(exec, *reinterpret_cast<const QVariantList *>(ptr));
             break;
         case QMetaType::QVariantMap:
-            result = objectFromVariantMap(*reinterpret_cast<const QVariantMap *>(ptr));
+            result = objectFromVariantMap(exec, *reinterpret_cast<const QVariantMap *>(ptr));
             break;
         case QMetaType::QDateTime:
-            result = q->newDate(*reinterpret_cast<const QDateTime *>(ptr));
+            result = newDate(exec, *reinterpret_cast<const QDateTime *>(ptr));
             break;
         case QMetaType::QDate:
-            result = q->newDate(QDateTime(*reinterpret_cast<const QDate *>(ptr)));
+            result = newDate(exec, QDateTime(*reinterpret_cast<const QDate *>(ptr)));
             break;
 #ifndef QT_NO_REGEXP
         case QMetaType::QRegExp:
-            result = q->newRegExp(*reinterpret_cast<const QRegExp *>(ptr));
+            result = newRegExp(exec, *reinterpret_cast<const QRegExp *>(ptr));
             break;
 #endif
 #ifndef QT_NO_QOBJECT
         case QMetaType::QObjectStar:
         case QMetaType::QWidgetStar:
-            result = q->newQObject(*reinterpret_cast<QObject* const *>(ptr));
+            result = eng->newQObject(*reinterpret_cast<QObject* const *>(ptr));
             break;
 #endif
         default:
             if (type == qMetaTypeId<QScriptValue>()) {
-                result = *reinterpret_cast<const QScriptValue*>(ptr);
-                if (!result.isValid())
-                    return QScriptValue(q, QScriptValue::UndefinedValue);
+                result = eng->scriptValueToJSCValue(*reinterpret_cast<const QScriptValue*>(ptr));
+                if (!result)
+                    return JSC::jsUndefined();
             }
 
 #ifndef QT_NO_QOBJECT
             // lazy registration of some common list types
             else if (type == qMetaTypeId<QObjectList>()) {
-                qScriptRegisterSequenceMetaType<QObjectList>(q);
-                return create(type, ptr);
+                qScriptRegisterSequenceMetaType<QObjectList>(eng->q_func());
+                return create(exec, type, ptr);
             }
 #endif
             else if (type == qMetaTypeId<QList<int> >()) {
-                qScriptRegisterSequenceMetaType<QList<int> >(q);
-                return create(type, ptr);
+                qScriptRegisterSequenceMetaType<QList<int> >(eng->q_func());
+                return create(exec, type, ptr);
             }
 
             else {
                 QByteArray typeName = QMetaType::typeName(type);
                 if (typeName == "QVariant")
-                    result = scriptValueFromVariant(*reinterpret_cast<const QVariant*>(ptr));
+                    result = jscValueFromVariant(exec, *reinterpret_cast<const QVariant*>(ptr));
                 if (typeName.endsWith('*') && !*reinterpret_cast<void* const *>(ptr))
-                    return QScriptValue(q, QScriptValue::NullValue);
+                    return JSC::jsNull();
                 else
-                    result = q->newVariant(QVariant(type, ptr));
+                    result = eng->newVariant(QVariant(type, ptr));
             }
         }
     }
-    if (result.isObject() && info && info->prototype
-        && JSC::JSValue::strictEqual(scriptValueToJSCValue(result.prototype()), originalGlobalObject()->objectPrototype())) {
-        result.setPrototype(scriptValueFromJSCValue(info->prototype));
+    if (result && result.isObject() && info && info->prototype
+        && JSC::JSValue::strictEqual(JSC::asObject(result)->prototype(), eng->originalGlobalObject()->objectPrototype())) {
+        JSC::asObject(result)->setPrototype(info->prototype);
     }
     return result;
 }
 
-bool QScriptEnginePrivate::convert(const QScriptValue &value,
-                                   int type, void *ptr,
-                                   QScriptEnginePrivate *eng)
+bool QScriptEnginePrivate::convertValue(JSC::ExecState *exec, JSC::JSValue value,
+                                        int type, void *ptr)
 {
-    if (!eng)
-        eng = QScriptValuePrivate::getEngine(value);
+    QScriptEnginePrivate *eng = exec ? QScript::scriptEngineFromExec(exec) : 0;
     if (eng) {
         QScriptTypeInfo *info = eng->m_typeInfos.value(type);
         if (info && info->demarshal) {
-            info->demarshal(value, ptr);
+            info->demarshal(eng->scriptValueFromJSCValue(value), ptr);
             return true;
         }
     }
@@ -2918,78 +2938,78 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
     // check if it's one of the types we know
     switch (QMetaType::Type(type)) {
     case QMetaType::Bool:
-        *reinterpret_cast<bool*>(ptr) = value.toBoolean();
+        *reinterpret_cast<bool*>(ptr) = toBool(exec, value);
         return true;
     case QMetaType::Int:
-        *reinterpret_cast<int*>(ptr) = value.toInt32();
+        *reinterpret_cast<int*>(ptr) = toInt32(exec, value);
         return true;
     case QMetaType::UInt:
-        *reinterpret_cast<uint*>(ptr) = value.toUInt32();
+        *reinterpret_cast<uint*>(ptr) = toUInt32(exec, value);
         return true;
     case QMetaType::LongLong:
-        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(value.toInteger());
+        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(toInteger(exec, value));
         return true;
     case QMetaType::ULongLong:
-        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(value.toInteger());
+        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(toInteger(exec, value));
         return true;
     case QMetaType::Double:
-        *reinterpret_cast<double*>(ptr) = value.toNumber();
+        *reinterpret_cast<double*>(ptr) = toNumber(exec, value);
         return true;
     case QMetaType::QString:
         if (value.isUndefined() || value.isNull())
             *reinterpret_cast<QString*>(ptr) = QString();
         else
-            *reinterpret_cast<QString*>(ptr) = value.toString();
+            *reinterpret_cast<QString*>(ptr) = toString(exec, value);
         return true;
     case QMetaType::Float:
-        *reinterpret_cast<float*>(ptr) = value.toNumber();
+        *reinterpret_cast<float*>(ptr) = toNumber(exec, value);
         return true;
     case QMetaType::Short:
-        *reinterpret_cast<short*>(ptr) = short(value.toInt32());
+        *reinterpret_cast<short*>(ptr) = short(toInt32(exec, value));
         return true;
     case QMetaType::UShort:
-        *reinterpret_cast<unsigned short*>(ptr) = value.toUInt16();
+        *reinterpret_cast<unsigned short*>(ptr) = QScript::ToUInt16(toNumber(exec, value));
         return true;
     case QMetaType::Char:
-        *reinterpret_cast<char*>(ptr) = char(value.toInt32());
+        *reinterpret_cast<char*>(ptr) = char(toInt32(exec, value));
         return true;
     case QMetaType::UChar:
-        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(value.toInt32());
+        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(toInt32(exec, value));
         return true;
     case QMetaType::QChar:
         if (value.isString()) {
-            QString str = value.toString();
+            QString str = toString(exec, value);
             *reinterpret_cast<QChar*>(ptr) = str.isEmpty() ? QChar() : str.at(0);
         } else {
-            *reinterpret_cast<QChar*>(ptr) = QChar(value.toUInt16());
+            *reinterpret_cast<QChar*>(ptr) = QChar(QScript::ToUInt16(toNumber(exec, value)));
         }
         return true;
     case QMetaType::QDateTime:
-        if (value.isDate()) {
-            *reinterpret_cast<QDateTime *>(ptr) = value.toDateTime();
+        if (isDate(value)) {
+            *reinterpret_cast<QDateTime *>(ptr) = toDateTime(exec, value);
             return true;
         } break;
     case QMetaType::QDate:
-        if (value.isDate()) {
-            *reinterpret_cast<QDate *>(ptr) = value.toDateTime().date();
+        if (isDate(value)) {
+            *reinterpret_cast<QDate *>(ptr) = toDateTime(exec, value).date();
             return true;
         } break;
 #ifndef QT_NO_REGEXP
     case QMetaType::QRegExp:
-        if (value.isRegExp()) {
-            *reinterpret_cast<QRegExp *>(ptr) = value.toRegExp();
+        if (isRegExp(value)) {
+            *reinterpret_cast<QRegExp *>(ptr) = toRegExp(exec, value);
             return true;
         } break;
 #endif
 #ifndef QT_NO_QOBJECT
     case QMetaType::QObjectStar:
-        if (value.isQObject() || value.isNull()) {
-            *reinterpret_cast<QObject* *>(ptr) = value.toQObject();
+        if (isQObject(value) || value.isNull()) {
+            *reinterpret_cast<QObject* *>(ptr) = toQObject(exec, value);
             return true;
         } break;
     case QMetaType::QWidgetStar:
-        if (value.isQObject() || value.isNull()) {
-            QObject *qo = value.toQObject();
+        if (isQObject(value) || value.isNull()) {
+            QObject *qo = toQObject(exec, value);
             if (!qo || qo->isWidgetType()) {
                 *reinterpret_cast<QWidget* *>(ptr) = reinterpret_cast<QWidget*>(qo);
                 return true;
@@ -2997,18 +3017,18 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
         } break;
 #endif
     case QMetaType::QStringList:
-        if (value.isArray()) {
-            *reinterpret_cast<QStringList *>(ptr) = stringListFromArray(value);
+        if (isArray(value)) {
+            *reinterpret_cast<QStringList *>(ptr) = stringListFromArray(exec, value);
             return true;
         } break;
     case QMetaType::QVariantList:
-        if (value.isArray()) {
-            *reinterpret_cast<QVariantList *>(ptr) = variantListFromArray(value);
+        if (isArray(value)) {
+            *reinterpret_cast<QVariantList *>(ptr) = variantListFromArray(exec, value);
             return true;
         } break;
     case QMetaType::QVariantMap:
-        if (value.isObject()) {
-            *reinterpret_cast<QVariantMap *>(ptr) = variantMapFromObject(value);
+        if (isObject(value)) {
+            *reinterpret_cast<QVariantMap *>(ptr) = variantMapFromObject(exec, value);
             return true;
         } break;
     default:
@@ -3017,28 +3037,28 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
 
     QByteArray name = QMetaType::typeName(type);
 #ifndef QT_NO_QOBJECT
-    if (convertToNativeQObject(value, name, reinterpret_cast<void* *>(ptr)))
+    if (convertToNativeQObject(exec, value, name, reinterpret_cast<void* *>(ptr)))
         return true;
 #endif
-    if (value.isVariant() && name.endsWith('*')) {
+    if (isVariant(value) && name.endsWith('*')) {
         int valueType = QMetaType::type(name.left(name.size()-1));
-        QVariant &var = QScriptValuePrivate::get(value)->variantValue();
+        QVariant &var = variantValue(value);
         if (valueType == var.userType()) {
             *reinterpret_cast<void* *>(ptr) = var.data();
             return true;
         } else {
             // look in the prototype chain
-            QScriptValue proto = value.prototype();
+            JSC::JSValue proto = JSC::asObject(value)->prototype();
             while (proto.isObject()) {
                 bool canCast = false;
-                if (proto.isVariant()) {
-                    canCast = (type == proto.toVariant().userType())
-                              || (valueType && (valueType == proto.toVariant().userType()));
+                if (isVariant(proto)) {
+                    canCast = (type == variantValue(proto).userType())
+                              || (valueType && (valueType == variantValue(proto).userType()));
                 }
 #ifndef QT_NO_QOBJECT
-                else if (proto.isQObject()) {
+                else if (isQObject(proto)) {
                     QByteArray className = name.left(name.size()-1);
-                    if (QObject *qobject = proto.toQObject())
+                    if (QObject *qobject = toQObject(exec, proto))
                         canCast = qobject->qt_metacast(className) != 0;
                 }
 #endif
@@ -3050,7 +3070,7 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
                         *reinterpret_cast<void* *>(ptr) = var.data();
                     return true;
                 }
-                proto = proto.prototype();
+                proto = JSC::asObject(proto)->prototype();
             }
         }
     } else if (value.isNull() && name.endsWith('*')) {
@@ -3059,10 +3079,10 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
     } else if (type == qMetaTypeId<QScriptValue>()) {
         if (!eng)
             return false;
-        *reinterpret_cast<QScriptValue*>(ptr) = value;
+        *reinterpret_cast<QScriptValue*>(ptr) = eng->scriptValueFromJSCValue(value);
         return true;
     } else if (name == "QVariant") {
-        *reinterpret_cast<QVariant*>(ptr) = value.toVariant();
+        *reinterpret_cast<QVariant*>(ptr) = toVariant(exec, value);
         return true;
     }
 
@@ -3072,14 +3092,14 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
         if (!eng)
             return false;
         qScriptRegisterSequenceMetaType<QObjectList>(eng->q_func());
-        return convert(value, type, ptr, eng);
+        return convertValue(exec, value, type, ptr);
     }
 #endif
     else if (type == qMetaTypeId<QList<int> >()) {
         if (!eng)
             return false;
         qScriptRegisterSequenceMetaType<QList<int> >(eng->q_func());
-        return convert(value, type, ptr, eng);
+        return convertValue(exec, value, type, ptr);
     }
 
 #if 0
@@ -3091,6 +3111,102 @@ bool QScriptEnginePrivate::convert(const QScriptValue &value,
     return false;
 }
 
+bool QScriptEnginePrivate::convertNumber(qsreal value, int type, void *ptr)
+{
+    switch (QMetaType::Type(type)) {
+    case QMetaType::Bool:
+        *reinterpret_cast<bool*>(ptr) = QScript::ToBool(value);
+        return true;
+    case QMetaType::Int:
+        *reinterpret_cast<int*>(ptr) = QScript::ToInt32(value);
+        return true;
+    case QMetaType::UInt:
+        *reinterpret_cast<uint*>(ptr) = QScript::ToUInt32(value);
+        return true;
+    case QMetaType::LongLong:
+        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(QScript::ToInteger(value));
+        return true;
+    case QMetaType::ULongLong:
+        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(QScript::ToInteger(value));
+        return true;
+    case QMetaType::Double:
+        *reinterpret_cast<double*>(ptr) = value;
+        return true;
+    case QMetaType::QString:
+        *reinterpret_cast<QString*>(ptr) = QScript::ToString(value);
+        return true;
+    case QMetaType::Float:
+        *reinterpret_cast<float*>(ptr) = value;
+        return true;
+    case QMetaType::Short:
+        *reinterpret_cast<short*>(ptr) = short(QScript::ToInt32(value));
+        return true;
+    case QMetaType::UShort:
+        *reinterpret_cast<unsigned short*>(ptr) = QScript::ToUInt16(value);
+        return true;
+    case QMetaType::Char:
+        *reinterpret_cast<char*>(ptr) = char(QScript::ToInt32(value));
+        return true;
+    case QMetaType::UChar:
+        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(QScript::ToInt32(value));
+        return true;
+    case QMetaType::QChar:
+        *reinterpret_cast<QChar*>(ptr) = QChar(QScript::ToUInt16(value));
+        return true;
+    default:
+        break;
+    }
+    return false;
+}
+
+bool QScriptEnginePrivate::convertString(const QString &value, int type, void *ptr)
+{
+    switch (QMetaType::Type(type)) {
+    case QMetaType::Bool:
+        *reinterpret_cast<bool*>(ptr) = QScript::ToBool(value);
+        return true;
+    case QMetaType::Int:
+        *reinterpret_cast<int*>(ptr) = QScript::ToInt32(value);
+        return true;
+    case QMetaType::UInt:
+        *reinterpret_cast<uint*>(ptr) = QScript::ToUInt32(value);
+        return true;
+    case QMetaType::LongLong:
+        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(QScript::ToInteger(value));
+        return true;
+    case QMetaType::ULongLong:
+        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(QScript::ToInteger(value));
+        return true;
+    case QMetaType::Double:
+        *reinterpret_cast<double*>(ptr) = QScript::ToNumber(value);
+        return true;
+    case QMetaType::QString:
+        *reinterpret_cast<QString*>(ptr) = value;
+        return true;
+    case QMetaType::Float:
+        *reinterpret_cast<float*>(ptr) = QScript::ToNumber(value);
+        return true;
+    case QMetaType::Short:
+        *reinterpret_cast<short*>(ptr) = short(QScript::ToInt32(value));
+        return true;
+    case QMetaType::UShort:
+        *reinterpret_cast<unsigned short*>(ptr) = QScript::ToUInt16(value);
+        return true;
+    case QMetaType::Char:
+        *reinterpret_cast<char*>(ptr) = char(QScript::ToInt32(value));
+        return true;
+    case QMetaType::UChar:
+        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(QScript::ToInt32(value));
+        return true;
+    case QMetaType::QChar:
+        *reinterpret_cast<QChar*>(ptr) = QChar(QScript::ToUInt16(value));
+        return true;
+    default:
+        break;
+    }
+    return false;
+}
+
 bool QScriptEnginePrivate::hasDemarshalFunction(int type) const
 {
     QScriptTypeInfo *info = m_typeInfos.value(type);
@@ -3103,7 +3219,7 @@ bool QScriptEnginePrivate::hasDemarshalFunction(int type) const
 bool QScriptEngine::convert(const QScriptValue &value, int type, void *ptr)
 {
     Q_D(QScriptEngine);
-    return QScriptEnginePrivate::convert(value, type, ptr, d);
+    return QScriptEnginePrivate::convertValue(d->currentFrame, d->scriptValueToJSCValue(value), type, ptr);
 }
 
 /*!
@@ -3111,7 +3227,20 @@ bool QScriptEngine::convert(const QScriptValue &value, int type, void *ptr)
 */
 bool QScriptEngine::convertV2(const QScriptValue &value, int type, void *ptr)
 {
-    return QScriptEnginePrivate::convert(value, type, ptr, /*engine=*/0);
+    QScriptValuePrivate *vp = QScriptValuePrivate::get(value);
+    if (vp) {
+        switch (vp->type) {
+        case QScriptValuePrivate::JavaScriptCore: {
+            JSC::ExecState *exec = vp->engine ? vp->engine->currentFrame : 0;
+            return QScriptEnginePrivate::convertValue(exec, vp->jscValue, type, ptr);
+        }
+        case QScriptValuePrivate::Number:
+            return QScriptEnginePrivate::convertNumber(vp->numberValue, type, ptr);
+        case QScriptValuePrivate::String:
+            return QScriptEnginePrivate::convertString(vp->stringValue, type, ptr);
+        }
+    }
+    return false;
 }
 
 /*!
diff --git a/src/script/api/qscriptengine_p.h b/src/script/api/qscriptengine_p.h
index 4be9146..eff34af 100644
--- a/src/script/api/qscriptengine_p.h
+++ b/src/script/api/qscriptengine_p.h
@@ -44,7 +44,12 @@
 #include <QtCore/qset.h>
 #include "qscriptvalue_p.h"
 #include "qscriptstring_p.h"
+#include "bridge/qscriptclassobject_p.h"
+#include "bridge/qscriptdeclarativeclass_p.h"
+#include "bridge/qscriptdeclarativeobject_p.h"
 #include "bridge/qscriptobject_p.h"
+#include "bridge/qscriptqobject_p.h"
+#include "bridge/qscriptvariant_p.h"
 #include "utils/qscriptdate_p.h"
 
 #include "DateConstructor.h"
@@ -145,6 +150,8 @@ public:
     static inline bool isObject(JSC::JSValue);
     static inline bool isRegExp(JSC::JSValue);
     static inline bool isVariant(JSC::JSValue);
+    static inline bool isQObject(JSC::JSValue);
+    static inline bool isQMetaObject(JSC::JSValue);
 
     static inline bool toBool(JSC::ExecState *, JSC::JSValue);
     static inline qsreal toInteger(JSC::ExecState *, JSC::JSValue);
@@ -155,6 +162,12 @@ public:
     static inline QString toString(JSC::ExecState *, JSC::JSValue);
 
     static inline QDateTime toDateTime(JSC::ExecState *, JSC::JSValue);
+#ifndef QT_NO_REGEXP
+    static QRegExp toRegExp(JSC::ExecState*, JSC::JSValue);
+#endif
+    static QVariant toVariant(JSC::ExecState *, JSC::JSValue);
+    static inline QObject *toQObject(JSC::ExecState *, JSC::JSValue);
+    static inline const QMetaObject *toQMetaObject(JSC::ExecState *, JSC::JSValue);
 
     static inline JSC::JSValue property(JSC::ExecState*, JSC::JSValue, const JSC::Identifier &id,
                                  int resolveMode = QScriptValue::ResolvePrototype);
@@ -174,29 +187,29 @@ public:
     static inline QScriptValue::PropertyFlags propertyFlags(JSC::ExecState*, JSC::JSValue value,
                                               const QString &name, const QScriptValue::ResolveFlags &mode);
 
-    static bool convert(const QScriptValue &value,
-                        int type, void *ptr,
-                        QScriptEnginePrivate *eng);
-    QScriptValue create(int type, const void *ptr);
+    static bool convertValue(JSC::ExecState*, JSC::JSValue value,
+                             int type, void *ptr);
+    static bool convertNumber(qsreal, int type, void *ptr);
+    static bool convertString(const QString &, int type, void *ptr);
+    static JSC::JSValue create(JSC::ExecState*, int type, const void *ptr);
     bool hasDemarshalFunction(int type) const;
 
     inline QScriptValue scriptValueFromJSCValue(JSC::JSValue value);
     inline JSC::JSValue scriptValueToJSCValue(const QScriptValue &value);
 
-    QScriptValue scriptValueFromVariant(const QVariant &value);
-    QVariant scriptValueToVariant(const QScriptValue &value, int targetType);
-
-    JSC::JSValue jscValueFromVariant(const QVariant &value);
-    QVariant jscValueToVariant(JSC::JSValue value, int targetType);
+    static inline JSC::JSValue jscValueFromVariant(JSC::ExecState*, const QVariant &value);
+    static QVariant jscValueToVariant(JSC::ExecState*, JSC::JSValue value, int targetType);
+    static inline QVariant &variantValue(JSC::JSValue value);
+    static inline void setVariantValue(JSC::JSValue objectValue, const QVariant &value);
 
-    QScriptValue arrayFromStringList(const QStringList &lst);
-    static QStringList stringListFromArray(const QScriptValue &arr);
+    static JSC::JSValue arrayFromStringList(JSC::ExecState*, const QStringList &lst);
+    static QStringList stringListFromArray(JSC::ExecState*, JSC::JSValue arr);
 
-    QScriptValue arrayFromVariantList(const QVariantList &lst);
-    static QVariantList variantListFromArray(const QScriptValue &arr);
+    static JSC::JSValue arrayFromVariantList(JSC::ExecState*, const QVariantList &lst);
+    static QVariantList variantListFromArray(JSC::ExecState*, JSC::JSValue arr);
 
-    QScriptValue objectFromVariantMap(const QVariantMap &vmap);
-    static QVariantMap variantMapFromObject(const QScriptValue &obj);
+    static JSC::JSValue objectFromVariantMap(JSC::ExecState*, const QVariantMap &vmap);
+    static QVariantMap variantMapFromObject(JSC::ExecState*, JSC::JSValue obj);
 
     JSC::JSValue defaultPrototype(int metaTypeId) const;
     void setDefaultPrototype(int metaTypeId, JSC::JSValue prototype);
@@ -269,6 +282,10 @@ public:
 
     static JSC::JSValue newRegExp(JSC::ExecState *, const QString &pattern, const QString &flags);
     JSC::JSValue newVariant(const QVariant &);
+    JSC::JSValue newVariant(JSC::JSValue objectValue, const QVariant &);
+
+    static inline QScriptDeclarativeClass *declarativeClass(JSC::JSValue);
+    static inline QScriptDeclarativeClass::Object *declarativeObject(JSC::JSValue);
 
 #ifndef QT_NO_QOBJECT
     JSC::JSValue newQObject(QObject *object,
@@ -277,7 +294,7 @@ public:
     JSC::JSValue newQMetaObject(const QMetaObject *metaObject,
                                 JSC::JSValue ctor);
 
-    static bool convertToNativeQObject(const QScriptValue &value,
+    static bool convertToNativeQObject(JSC::ExecState*, JSC::JSValue,
                                        const QByteArray &targetType,
                                        void **result);
 
@@ -525,6 +542,13 @@ inline void QScriptEnginePrivate::unregisterScriptValue(QScriptValuePrivate *val
     value->next = 0;
 }
 
+inline JSC::JSValue QScriptEnginePrivate::jscValueFromVariant(JSC::ExecState *exec, const QVariant &v)
+{
+    JSC::JSValue result = create(exec, v.userType(), v.data());
+    Q_ASSERT(result);
+    return result;
+}
+
 inline QScriptValue QScriptEnginePrivate::scriptValueFromJSCValue(JSC::JSValue value)
 {
     if (!value)
@@ -801,6 +825,30 @@ inline bool QScriptEnginePrivate::isVariant(JSC::JSValue value)
     return (delegate && (delegate->type() == QScriptObjectDelegate::Variant));
 }
 
+inline bool QScriptEnginePrivate::isQObject(JSC::JSValue value)
+{
+#ifndef QT_NO_QOBJECT
+    if (!isObject(value) || !value.inherits(&QScriptObject::info))
+        return false;
+    QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(value));
+    QScriptObjectDelegate *delegate = object->delegate();
+    return (delegate && (delegate->type() == QScriptObjectDelegate::QtObject ||
+                         (delegate->type() == QScriptObjectDelegate::DeclarativeClassObject &&
+                          static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass()->isQObject())));
+#else
+    return false;
+#endif
+}
+
+inline bool QScriptEnginePrivate::isQMetaObject(JSC::JSValue value)
+{
+#ifndef QT_NO_QOBJECT
+    return JSC::asObject(value)->inherits(&QScript::QMetaObjectWrapperObject::info);
+#else
+    return false;
+#endif
+}
+
 inline bool QScriptEnginePrivate::toBool(JSC::ExecState *exec, JSC::JSValue value)
 {
     JSC::JSValue savedException;
@@ -876,6 +924,76 @@ inline QDateTime QScriptEnginePrivate::toDateTime(JSC::ExecState *, JSC::JSValue
     return QScript::ToDateTime(t, Qt::LocalTime);
 }
 
+inline QObject *QScriptEnginePrivate::toQObject(JSC::ExecState *exec, JSC::JSValue value)
+{
+#ifndef QT_NO_QOBJECT
+    if (isObject(value) && value.inherits(&QScriptObject::info)) {
+        QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(value));
+        QScriptObjectDelegate *delegate = object->delegate();
+        if (!delegate)
+            return 0;
+        if (delegate->type() == QScriptObjectDelegate::QtObject)
+            return static_cast<QScript::QObjectDelegate*>(delegate)->value();
+        if (delegate->type() == QScriptObjectDelegate::DeclarativeClassObject)
+            return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass()->toQObject(declarativeObject(value));
+        if (delegate->type() == QScriptObjectDelegate::Variant) {
+            QVariant var = variantValue(value);
+            int type = var.userType();
+            if ((type == QMetaType::QObjectStar) || (type == QMetaType::QWidgetStar))
+                return *reinterpret_cast<QObject* const *>(var.constData());
+        }
+    }
+#endif
+    return 0;
+}
+
+inline const QMetaObject *QScriptEnginePrivate::toQMetaObject(JSC::ExecState*, JSC::JSValue value)
+{
+#ifndef QT_NO_QOBJECT
+    if (isQMetaObject(value))
+        return static_cast<QScript::QMetaObjectWrapperObject*>(JSC::asObject(value))->value();
+#endif
+    return 0;
+}
+
+inline QVariant &QScriptEnginePrivate::variantValue(JSC::JSValue value)
+{
+    Q_ASSERT(value.inherits(&QScriptObject::info));
+    QScriptObjectDelegate *delegate = static_cast<QScriptObject*>(JSC::asObject(value))->delegate();
+    Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::Variant));
+    return static_cast<QScript::QVariantDelegate*>(delegate)->value();
+}
+
+inline void QScriptEnginePrivate::setVariantValue(JSC::JSValue objectValue, const QVariant &value)
+{
+    Q_ASSERT(objectValue.inherits(&QScriptObject::info));
+    QScriptObjectDelegate *delegate = static_cast<QScriptObject*>(JSC::asObject(objectValue))->delegate();
+    Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::Variant));
+    static_cast<QScript::QVariantDelegate*>(delegate)->setValue(value);
+}
+
+inline QScriptDeclarativeClass *QScriptEnginePrivate::declarativeClass(JSC::JSValue v)
+{
+    if (!QScriptEnginePrivate::isObject(v) || !v.inherits(&QScriptObject::info))
+        return 0;
+    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(v));
+    QScriptObjectDelegate *delegate = scriptObject->delegate();
+    if (!delegate || (delegate->type() != QScriptObjectDelegate::DeclarativeClassObject))
+        return 0;
+    return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass();
+}
+
+inline QScriptDeclarativeClass::Object *QScriptEnginePrivate::declarativeObject(JSC::JSValue v)
+{
+    if (!QScriptEnginePrivate::isObject(v) || !v.inherits(&QScriptObject::info))
+        return 0;
+    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(v));
+    QScriptObjectDelegate *delegate = scriptObject->delegate();
+    if (!delegate || (delegate->type() != QScriptObjectDelegate::DeclarativeClassObject))
+        return 0;
+    return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->object();
+}
+
 QT_END_NAMESPACE
 
 #endif
diff --git a/src/script/api/qscriptvalue.cpp b/src/script/api/qscriptvalue.cpp
index a7d9f79..7f1fdaa 100644
--- a/src/script/api/qscriptvalue.cpp
+++ b/src/script/api/qscriptvalue.cpp
@@ -42,14 +42,6 @@
 #include <QtCore/qvarlengtharray.h>
 #include <QtCore/qnumeric.h>
 
-#include "utils/qscriptdate_p.h"
-#include "bridge/qscriptobject_p.h"
-#include "bridge/qscriptclassobject_p.h"
-#include "bridge/qscriptvariant_p.h"
-#include "bridge/qscriptqobject_p.h"
-#include "bridge/qscriptdeclarativeclass_p.h"
-#include "bridge/qscriptdeclarativeobject_p.h"
-
 /*!
   \since 4.3
   \class QScriptValue
@@ -176,22 +168,6 @@
 
 QT_BEGIN_NAMESPACE
 
-QVariant &QScriptValuePrivate::variantValue() const
-{
-    Q_ASSERT(jscValue.inherits(&QScriptObject::info));
-    QScriptObjectDelegate *delegate = static_cast<QScriptObject*>(JSC::asObject(jscValue))->delegate();
-    Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::Variant));
-    return static_cast<QScript::QVariantDelegate*>(delegate)->value();
-}
-
-void QScriptValuePrivate::setVariantValue(const QVariant &value)
-{
-    Q_ASSERT(jscValue.inherits(&QScriptObject::info));
-    QScriptObjectDelegate *delegate = static_cast<QScriptObject*>(JSC::asObject(jscValue))->delegate();
-    Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::Variant));
-    static_cast<QScript::QVariantDelegate*>(delegate)->setValue(value);
-}
-
 void QScriptValuePrivate::detachFromEngine()
 {
     if (isJSC())
@@ -1205,40 +1181,10 @@ QVariant QScriptValue::toVariant() const
     if (!d)
         return QVariant();
     switch (d->type) {
-    case QScriptValuePrivate::JavaScriptCore:
-        if (isObject()) {
-            if (isVariant())
-                return d->variantValue();
-#ifndef QT_NO_QOBJECT
-            else if (isQObject())
-                return qVariantFromValue(toQObject());
-#endif
-            else if (isDate())
-                return QVariant(toDateTime());
-#ifndef QT_NO_REGEXP
-            else if (isRegExp())
-                return QVariant(toRegExp());
-#endif
-            else if (isArray())
-                return QScriptEnginePrivate::variantListFromArray(*this);
-            else if (QScriptDeclarativeClass *dc = QScriptDeclarativeClass::scriptClass(*this))
-                return dc->toVariant(QScriptDeclarativeClass::object(*this));
-            // try to convert to primitive
-            JSC::ExecState *exec = d->engine->currentFrame;
-            JSC::JSValue savedException;
-            QScriptEnginePrivate::saveException(exec, &savedException);
-            JSC::JSValue prim = d->jscValue.toPrimitive(exec);
-            QScriptEnginePrivate::restoreException(exec, savedException);
-            if (!prim.isObject())
-                return d->engine->scriptValueFromJSCValue(prim).toVariant();
-        } else if (isNumber()) {
-            return QVariant(toNumber());
-        } else if (isString()) {
-            return QVariant(toString());
-        } else if (isBool()) {
-            return QVariant(toBool());
-        }
-        return QVariant();
+    case QScriptValuePrivate::JavaScriptCore: {
+        JSC::ExecState *exec = d->engine ? d->engine->currentFrame : 0;
+        return QScriptEnginePrivate::toVariant(exec, d->jscValue);
+    }
     case QScriptValuePrivate::Number:
         return QVariant(d->numberValue);
     case QScriptValuePrivate::String:
@@ -1286,13 +1232,9 @@ QDateTime QScriptValue::toDateTime() const
 QRegExp QScriptValue::toRegExp() const
 {
     Q_D(const QScriptValue);
-    if (!isRegExp())
-        return QRegExp();
-    QString pattern = property(QLatin1String("source"), QScriptValue::ResolvePrototype).toString();
-    Qt::CaseSensitivity kase = Qt::CaseSensitive;
-    if (property(QLatin1String("ignoreCase"), QScriptValue::ResolvePrototype).toBool())
-        kase = Qt::CaseInsensitive;
-    return QRegExp(pattern, kase, QRegExp::RegExp2);
+    if (!d || !d->engine)
+         return QRegExp();
+    return QScriptEnginePrivate::toRegExp(d->engine->currentFrame, d->jscValue);
 }
 #endif // QT_NO_REGEXP
 
@@ -1309,19 +1251,9 @@ QRegExp QScriptValue::toRegExp() const
 QObject *QScriptValue::toQObject() const
 {
     Q_D(const QScriptValue);
-    if (isQObject()) {
-        QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
-        QScriptObjectDelegate *delegate = object->delegate();
-        if (delegate->type() == QScriptObjectDelegate::DeclarativeClassObject)
-            return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass()->toQObject(QScriptDeclarativeClass::object(*this));
-        return static_cast<QScript::QObjectDelegate*>(delegate)->value();
-    } else if (isVariant()) {
-        QVariant var = toVariant();
-        int type = var.userType();
-        if ((type == QMetaType::QObjectStar) || (type == QMetaType::QWidgetStar))
-            return *reinterpret_cast<QObject* const *>(var.constData());
-    }
-    return 0;
+    if (!d || !d->engine)
+        return 0;
+    return QScriptEnginePrivate::toQObject(d->engine->currentFrame, d->jscValue);
 }
 
 /*!
@@ -1333,9 +1265,9 @@ QObject *QScriptValue::toQObject() const
 const QMetaObject *QScriptValue::toQMetaObject() const
 {
     Q_D(const QScriptValue);
-    if (isQMetaObject())
-        return static_cast<QScript::QMetaObjectWrapperObject*>(JSC::asObject(d->jscValue))->value();
-    return 0;
+    if (!d || !d->engine)
+        return 0;
+    return QScriptEnginePrivate::toQMetaObject(d->engine->currentFrame, d->jscValue);
 }
 
 /*!
@@ -1971,13 +1903,9 @@ bool QScriptValue::isVariant() const
 bool QScriptValue::isQObject() const
 {
     Q_D(const QScriptValue);
-    if (!d || !d->isJSC() || !d->jscValue.inherits(&QScriptObject::info))
+    if (!d || !d->isJSC())
         return false;
-    QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
-    QScriptObjectDelegate *delegate = object->delegate();
-    return (delegate && (delegate->type() == QScriptObjectDelegate::QtObject ||
-                         (delegate->type() == QScriptObjectDelegate::DeclarativeClassObject &&
-                          static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass()->isQObject())));
+    return QScriptEnginePrivate::isQObject(d->jscValue);
 }
 
 /*!
@@ -1989,9 +1917,9 @@ bool QScriptValue::isQObject() const
 bool QScriptValue::isQMetaObject() const
 {
     Q_D(const QScriptValue);
-    if (!d || !d->isObject())
+    if (!d || !d->isJSC())
         return false;
-    return JSC::asObject(d->jscValue)->inherits(&QScript::QMetaObjectWrapperObject::info);
+    return QScriptEnginePrivate::isQMetaObject(d->jscValue);
 }
 
 /*!
diff --git a/src/script/api/qscriptvalue_p.h b/src/script/api/qscriptvalue_p.h
index dedc250..77b7330 100644
--- a/src/script/api/qscriptvalue_p.h
+++ b/src/script/api/qscriptvalue_p.h
@@ -69,9 +69,6 @@ public:
     inline bool isJSC() const;
     inline bool isObject() const;
 
-    QVariant &variantValue() const;
-    void setVariantValue(const QVariant &value);
-
     static inline QScriptValuePrivate *get(const QScriptValue &q)
     {
         return q.d_ptr.data();