Move more methods on QV8Engine over to use v4 based syntax

Change-Id: I7d3501a2c4cd0d749c7c30b5c60fee12cde58aa4
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

17 files changed, 117 insertions, 193 deletions

diff --git a/src/qml/qml/qqmljavascriptexpression.cpp b/src/qml/qml/qqmljavascriptexpression.cpp
index a8b3a99e39..8bb5001226 100644
--- a/src/qml/qml/qqmljavascriptexpression.cpp
+++ b/src/qml/qml/qqmljavascriptexpression.cpp
@@ -172,7 +172,7 @@ QQmlJavaScriptExpression::evaluate(QQmlContextData *context,
     v8::Local<v8::Value> result;
     {
         v8::TryCatch try_catch;
-        v8::Handle<v8::Object> This = ep->v8engine()->global();
+        v8::Handle<v8::Object> This = v8::Value::fromV4Value(ep->v8engine()->global());
         if (scopeObject() && requiresThisObject()) {
             v8::Handle<v8::Value> value = ep->v8engine()->newQObject(scopeObject());
             if (value->IsObject()) This = v8::Handle<v8::Object>::Cast(value);
diff --git a/src/qml/qml/qqmlproperty.cpp b/src/qml/qml/qqmlproperty.cpp
index b29861c4dc..91effab027 100644
--- a/src/qml/qml/qqmlproperty.cpp
+++ b/src/qml/qml/qqmlproperty.cpp
@@ -1551,7 +1551,7 @@ bool QQmlPropertyPrivate::writeBinding(QObject *object,
         return false;
     } else if (isVarProperty) {
         if (!result.IsEmpty() && result->IsFunction()
-                && !result->ToObject()->GetHiddenValue(v8engine->bindingFlagKey()).IsEmpty()) {
+                && !result->ToObject()->GetHiddenValue(v8::Value::fromV4Value(v8engine->bindingFlagKey())).IsEmpty()) {
             // we explicitly disallow this case to avoid confusion.  Users can still store one
             // in an array in a var property if they need to, but the common case is user error.
             expression->delayedError()->setErrorDescription(QLatin1String("Invalid use of Qt.binding() in a binding declaration."));
@@ -1568,11 +1568,11 @@ bool QQmlPropertyPrivate::writeBinding(QObject *object,
         writeValueProperty(object, core, QVariant(), context, flags);
     } else if (type == qMetaTypeId<QJSValue>()) {
         if (!result.IsEmpty() && result->IsFunction()
-                && !result->ToObject()->GetHiddenValue(v8engine->bindingFlagKey()).IsEmpty()) {
+                && !result->ToObject()->GetHiddenValue(v8::Value::fromV4Value(v8engine->bindingFlagKey())).IsEmpty()) {
             expression->delayedError()->setErrorDescription(QLatin1String("Invalid use of Qt.binding() in a binding declaration."));
             return false;
         }
-        writeValueProperty(object, core, QVariant::fromValue(v8engine->scriptValueFromInternal(result)), context, flags);
+        writeValueProperty(object, core, QVariant::fromValue(v8engine->scriptValueFromInternal(result->v4Value())), context, flags);
     } else if (isUndefined) {
         QString errorStr = QLatin1String("Unable to assign [undefined] to ");
         if (!QMetaType::typeName(type))
@@ -1582,7 +1582,7 @@ bool QQmlPropertyPrivate::writeBinding(QObject *object,
         expression->delayedError()->setErrorDescription(errorStr);
         return false;
     } else if (result->IsFunction()) {
-        if (!result->ToObject()->GetHiddenValue(v8engine->bindingFlagKey()).IsEmpty())
+        if (!result->ToObject()->GetHiddenValue(v8::Value::fromV4Value(v8engine->bindingFlagKey())).IsEmpty())
             expression->delayedError()->setErrorDescription(QLatin1String("Invalid use of Qt.binding() in a binding declaration."));
         else
             expression->delayedError()->setErrorDescription(QLatin1String("Unable to assign a function to a property of any type other than var."));
diff --git a/src/qml/qml/qqmlvmemetaobject.cpp b/src/qml/qml/qqmlvmemetaobject.cpp
index a80cba2c5e..fbdd3893ca 100644
--- a/src/qml/qml/qqmlvmemetaobject.cpp
+++ b/src/qml/qml/qqmlvmemetaobject.cpp
@@ -944,7 +944,7 @@ int QQmlVMEMetaObject::metaCall(QMetaObject::Call c, int _id, void **a)
 
                 v8::TryCatch try_catch;
 
-                v8::Local<v8::Value> result = function->Call(ep->v8engine()->global(), data->parameterCount, args);
+                v8::Local<v8::Value> result = function->Call(v8::Value::fromV4Value(ep->v8engine()->global()), data->parameterCount, args);
 
                 QVariant rv;
                 if (try_catch.HasCaught()) {
diff --git a/src/qml/qml/qqmlxmlhttprequest.cpp b/src/qml/qml/qqmlxmlhttprequest.cpp
index ebdd9ea3d8..9f2af9b424 100644
--- a/src/qml/qml/qqmlxmlhttprequest.cpp
+++ b/src/qml/qml/qqmlxmlhttprequest.cpp
@@ -1821,7 +1821,7 @@ void *qt_add_qmlxmlhttprequest(QV8Engine *engine)
     xmlhttprequest->Set(v8::String::New("HEADERS_RECEIVED"), v8::Integer::New(2), attributes);
     xmlhttprequest->Set(v8::String::New("LOADING"), v8::Integer::New(3), attributes);
     xmlhttprequest->Set(v8::String::New("DONE"), v8::Integer::New(4), attributes);
-    engine->global()->Set(v8::String::New("XMLHttpRequest"), xmlhttprequest->GetFunction());
+    v8::Local<v8::Object>::New(v8::Value::fromV4Value(engine->global()))->Set(v8::String::New("XMLHttpRequest"), xmlhttprequest->GetFunction());
 
     QQmlXMLHttpRequestData *data = new QQmlXMLHttpRequestData;
     return data;
diff --git a/src/qml/qml/v4/qv4bindings.cpp b/src/qml/qml/v4/qv4bindings.cpp
index a3b09b0ee8..bf7cc0b1bd 100644
--- a/src/qml/qml/v4/qv4bindings.cpp
+++ b/src/qml/qml/v4/qv4bindings.cpp
@@ -1644,7 +1644,7 @@ void QV4Bindings::run(int instrIndex, quint32 &executedBlocks,
             v8::HandleScope handle_scope;
             v8::Context::Scope scope(v8engine->context());
             new (output.getjsvalueptr()) QJSValue(v8engine->scriptValueFromInternal(
-                    v8engine->valueTypeWrapper()->newValueType(tmp, vt)));
+                    v8engine->valueTypeWrapper()->newValueType(tmp, vt)->v4Value()));
             JSVALUE_REGISTER(instr->unaryop.output);
         }
     }
@@ -1775,7 +1775,7 @@ void QV4Bindings::run(int instrIndex, quint32 &executedBlocks,
                 MARK_CLEAN_REGISTER(instr->unaryop.output);
             }
             QV8Engine *v8engine = QQmlEnginePrivate::get(context->engine)->v8engine();
-            new (output.getjsvalueptr()) QJSValue(v8engine->scriptValueFromInternal(tmp));
+            new (output.getjsvalueptr()) QJSValue(v8engine->scriptValueFromInternal(tmp->v4Value()));
             JSVALUE_REGISTER(instr->unaryop.output);
         }
     }
diff --git a/src/qml/qml/v8/qjsengine.cpp b/src/qml/qml/v8/qjsengine.cpp
index b842e058ff..63a176b283 100644
--- a/src/qml/qml/v8/qjsengine.cpp
+++ b/src/qml/qml/v8/qjsengine.cpp
@@ -322,7 +322,7 @@ QJSValue QJSEngine::newQObject(QObject *object)
     Q_D(QJSEngine);
     QScriptIsolate api(d, QScriptIsolate::NotNullEngine);
     v8::HandleScope handleScope;
-    return d->scriptValueFromInternal(d->newQObject(object, QV8Engine::JavaScriptOwnership));
+    return d->scriptValueFromInternal(d->newQObject(object, QV8Engine::JavaScriptOwnership)->v4Value());
 }
 
 /*!
diff --git a/src/qml/qml/v8/qjsvalue_p.h b/src/qml/qml/v8/qjsvalue_p.h
index 26dc7e6178..c085f39d50 100644
--- a/src/qml/qml/v8/qjsvalue_p.h
+++ b/src/qml/qml/v8/qjsvalue_p.h
@@ -70,7 +70,10 @@ public:
     QJSValuePrivate(QV4::ExecutionEngine *e, const QV4::Value &v)
         : PersistentValuePrivate(e, v)
         , string(QString())
-    {}
+    {
+        if (value.isDeleted())
+            value = QV4::Value::undefinedValue();
+    }
     QJSValuePrivate(QV4::ExecutionEngine *e, QV4::Object *o)
         : PersistentValuePrivate(e, QV4::Value::fromObject(o))
         , string(QString())
diff --git a/src/qml/qml/v8/qqmlbuiltinfunctions.cpp b/src/qml/qml/v8/qqmlbuiltinfunctions.cpp
index 11a8565604..c726f4c62d 100644
--- a/src/qml/qml/v8/qqmlbuiltinfunctions.cpp
+++ b/src/qml/qml/v8/qqmlbuiltinfunctions.cpp
@@ -1650,7 +1650,7 @@ v8::Handle<v8::Value> binding(const v8::Arguments &args)
         V8THROW_TYPE("binding(): argument (binding expression) must be a function");
 
     v8::Handle<v8::Object> rv = args[0]->ToObject()->Clone();
-    rv->SetHiddenValue(V8ENGINE()->bindingFlagKey(), v8::Boolean::New(true));
+    rv->SetHiddenValue(v8::Value::fromV4Value(V8ENGINE()->bindingFlagKey()), v8::Boolean::New(true));
     return rv;
 }
 
diff --git a/src/qml/qml/v8/qv8contextwrapper.cpp b/src/qml/qml/v8/qv8contextwrapper.cpp
index b056cc111e..66ccb56269 100644
--- a/src/qml/qml/v8/qv8contextwrapper.cpp
+++ b/src/qml/qml/v8/qv8contextwrapper.cpp
@@ -270,7 +270,7 @@ v8::Handle<v8::Value> QV8ContextWrapper::Getter(v8::Local<v8::String> property,
 
     QHashedV8String propertystring(property);
 
-    if (context->imports && QV8Engine::startsWithUpper(property)) {
+    if (context->imports && QV8Engine::startsWithUpper(property->v4Value().asString())) {
         // Search for attached properties, enums and imported scripts
         QQmlTypeNameCache::Result r = context->imports->query(propertystring);
         
diff --git a/src/qml/qml/v8/qv8engine.cpp b/src/qml/qml/v8/qv8engine.cpp
index 1526e40d16..7aa7cefa28 100644
--- a/src/qml/qml/v8/qv8engine.cpp
+++ b/src/qml/qml/v8/qv8engine.cpp
@@ -161,7 +161,7 @@ QV8Engine::QV8Engine(QJSEngine* qq, ContextOwnership ownership)
     QV8GCCallback::registerGcPrologueCallback();
     m_strongReferencer = qPersistentNew(v8::Object::New());
 
-    m_bindingFlagKey = qPersistentNew(v8::String::New("qml::binding"));
+    m_bindingFlagKey = QV4::PersistentValue(m_v4Engine, QV4::Value::fromString(m_v4Engine->current, QStringLiteral("qml::binding")));
 
     m_contextWrapper.init(this);
     m_qobjectWrapper.init(this);
@@ -197,8 +197,6 @@ QV8Engine::~QV8Engine()
     m_qobjectWrapper.destroy();
     m_contextWrapper.destroy();
 
-    qPersistentDispose(m_bindingFlagKey);
-
     if (m_ownsV8Context)
         qPersistentDispose(m_context);
 }
@@ -212,10 +210,10 @@ QVariant QV8Engine::toVariant(v8::Handle<v8::Value> value, int typeHint)
         return QVariant(value->BooleanValue());
 
     if (typeHint == QMetaType::QJsonValue)
-        return QVariant::fromValue(jsonValueFromJS(value));
+        return QVariant::fromValue(jsonValueFromJS(value->v4Value()));
 
     if (typeHint == qMetaTypeId<QJSValue>())
-        return QVariant::fromValue(scriptValueFromInternal(value));
+        return QVariant::fromValue(scriptValueFromInternal(value->v4Value()));
 
     if (value->IsObject()) {
         QV8ObjectResource *r = (QV8ObjectResource *)value->ToObject()->GetExternalResource();
@@ -251,7 +249,7 @@ QVariant QV8Engine::toVariant(v8::Handle<v8::Value> value, int typeHint)
             }
         } else if (typeHint == QMetaType::QJsonObject
                    && !value->IsArray() && !value->IsFunction()) {
-            return QVariant::fromValue(jsonObjectFromJS(value));
+            return QVariant::fromValue(jsonObjectFromJS(value->v4Value()));
         }
     }
 
@@ -271,7 +269,7 @@ QVariant QV8Engine::toVariant(v8::Handle<v8::Value> value, int typeHint)
 
             return qVariantFromValue<QList<QObject*> >(list);
         } else if (typeHint == QMetaType::QJsonArray) {
-            return QVariant::fromValue(jsonArrayFromJS(value));
+            return QVariant::fromValue(jsonArrayFromJS(value->v4Value()));
         }
 
         bool succeeded = false;
@@ -371,11 +369,11 @@ v8::Handle<v8::Value> QV8Engine::fromVariant(const QVariant &variant)
             case QMetaType::QVariantMap:
                 return objectFromVariantMap(this, *reinterpret_cast<const QVariantMap *>(ptr));
             case QMetaType::QJsonValue:
-                return jsonValueToJS(*reinterpret_cast<const QJsonValue *>(ptr));
+                return v8::Value::fromV4Value(jsonValueToJS(*reinterpret_cast<const QJsonValue *>(ptr)));
             case QMetaType::QJsonObject:
-                return jsonObjectToJS(*reinterpret_cast<const QJsonObject *>(ptr));
+                return v8::Value::fromV4Value(jsonObjectToJS(*reinterpret_cast<const QJsonObject *>(ptr)));
             case QMetaType::QJsonArray:
-                return jsonArrayToJS(*reinterpret_cast<const QJsonArray *>(ptr));
+                return v8::Value::fromV4Value(jsonArrayToJS(*reinterpret_cast<const QJsonArray *>(ptr)));
 
             default:
                 break;
@@ -897,10 +895,9 @@ void QV8Engine::setEngine(QQmlEngine *engine)
     initQmlGlobalObject();
 }
 
-v8::Handle<v8::Value> QV8Engine::throwException(v8::Handle<v8::Value> value)
+QV4::Value QV8Engine::global()
 {
-    __qmljs_throw(m_v4Engine->current, value->v4Value());
-    return value;
+    return QV4::Value::fromObject(m_v4Engine->globalObject);
 }
 
 // Converts a QVariantList to JS.
@@ -1086,7 +1083,7 @@ QV4::Value QV8Engine::metaTypeToJS(int type, const void *data)
                 return QV4::Value::nullValue();
             } else {
                 // Fall back to wrapping in a QVariant.
-                result = newVariant(QVariant(type, data))->v4Value();
+                result = variantWrapper()->newVariant(QVariant(type, data))->v4Value();
             }
         }
     }
@@ -1164,7 +1161,7 @@ bool QV8Engine::metaTypeFromJS(const QV4::Value &value, int type, void *data) {
     case QMetaType::QObjectStar: {
         v8::Handle<v8::Value> v = v8::Value::fromV4Value(value);
         if (isQObject(v) || value.isNull()) {
-            *reinterpret_cast<QObject* *>(data) = qtObjectFromJS(v);
+            *reinterpret_cast<QObject* *>(data) = qtObjectFromJS(v->v4Value());
             return true;
         } break;
     }
@@ -1187,13 +1184,13 @@ bool QV8Engine::metaTypeFromJS(const QV4::Value &value, int type, void *data) {
         *reinterpret_cast<QVariant*>(data) = variantFromJS(value);
         return true;
     case QMetaType::QJsonValue:
-        *reinterpret_cast<QJsonValue *>(data) = jsonValueFromJS(v8::Value::fromV4Value(value));
+        *reinterpret_cast<QJsonValue *>(data) = jsonValueFromJS(value);
         return true;
     case QMetaType::QJsonObject:
-        *reinterpret_cast<QJsonObject *>(data) = jsonObjectFromJS(v8::Value::fromV4Value(value));
+        *reinterpret_cast<QJsonObject *>(data) = jsonObjectFromJS(value);
         return true;
     case QMetaType::QJsonArray:
-        *reinterpret_cast<QJsonArray *>(data) = jsonArrayFromJS(v8::Value::fromV4Value(value));
+        *reinterpret_cast<QJsonArray *>(data) = jsonArrayFromJS(value);
         return true;
     default:
     ;
@@ -1221,11 +1218,11 @@ bool QV8Engine::metaTypeFromJS(const QV4::Value &value, int type, void *data) {
     // Try to use magic; for compatibility with qscriptvalue_cast.
 
     QByteArray name = QMetaType::typeName(type);
-    if (convertToNativeQObject(v8::Value::fromV4Value(value), name, reinterpret_cast<void* *>(data)))
+    if (convertToNativeQObject(value, name, reinterpret_cast<void* *>(data)))
         return true;
     if (isVariant(v8::Value::fromV4Value(value)) && name.endsWith('*')) {
         int valueType = QMetaType::type(name.left(name.size()-1));
-        QVariant &var = variantValue(v8::Value::fromV4Value(value));
+        QVariant &var = variantWrapper()->variantValue(v8::Value::fromV4Value(value));
         if (valueType == var.userType()) {
             // We have T t, T* is requested, so return &t.
             *reinterpret_cast<void* *>(data) = var.data();
@@ -1236,12 +1233,12 @@ bool QV8Engine::metaTypeFromJS(const QV4::Value &value, int type, void *data) {
             while (proto->IsObject()) {
                 bool canCast = false;
                 if (isVariant(proto)) {
-                    canCast = (type == variantValue(proto).userType())
-                              || (valueType && (valueType == variantValue(proto).userType()));
+                    canCast = (type == variantWrapper()->variantValue(proto).userType())
+                              || (valueType && (valueType == variantWrapper()->variantValue(proto).userType()));
                 }
                 else if (isQObject(proto)) {
                     QByteArray className = name.left(name.size()-1);
-                    if (QObject *qobject = qtObjectFromJS(proto))
+                    if (QObject *qobject = qtObjectFromJS(proto->v4Value()))
                         canCast = qobject->qt_metacast(className) != 0;
                 }
                 if (canCast) {
@@ -1306,47 +1303,45 @@ QVariant QV8Engine::variantFromJS(const QV4::Value &value,
     if (value.asRegExpObject())
         return QJSConverter::toRegExp(v8::Handle<v8::RegExp>::Cast(v8::Value::fromV4Value(value)));
     if (isVariant(v8::Value::fromV4Value(value)))
-        return variantValue(v8::Value::fromV4Value(value));
+        return variantWrapper()->variantValue(v8::Value::fromV4Value(value));
     if (isQObject(v8::Value::fromV4Value(value)))
-        return qVariantFromValue(qtObjectFromJS(v8::Value::fromV4Value(value)));
-    if (isValueType(v8::Value::fromV4Value(value)))
-        return toValueType(v8::Value::fromV4Value(value));
+        return qVariantFromValue(qtObjectFromJS(value));
+    if (isValueType(value))
+        return toValueType(value);
     return variantMapFromJS(value.asObject(), visitedObjects);
 }
 
-v8::Handle<v8::Value> QV8Engine::jsonValueToJS(const QJsonValue &value)
+QV4::Value QV8Engine::jsonValueToJS(const QJsonValue &value)
 {
-    return v8::Value::fromV4Value(m_jsonWrapper.fromJsonValue(value));
+    return m_jsonWrapper.fromJsonValue(value);
 }
 
-QJsonValue QV8Engine::jsonValueFromJS(v8::Handle<v8::Value> value)
+QJsonValue QV8Engine::jsonValueFromJS(const QV4::Value &value)
 {
-    return m_jsonWrapper.toJsonValue(value.get()->v4Value());
+    return m_jsonWrapper.toJsonValue(value);
 }
 
-v8::Local<v8::Object> QV8Engine::jsonObjectToJS(const QJsonObject &object)
+QV4::Value QV8Engine::jsonObjectToJS(const QJsonObject &object)
 {
-    return v8::Local<v8::Object>::New(v8::Value::fromV4Value(m_jsonWrapper.fromJsonObject(object)));
+    return m_jsonWrapper.fromJsonObject(object);
 }
 
-QJsonObject QV8Engine::jsonObjectFromJS(v8::Handle<v8::Value> value)
+QJsonObject QV8Engine::jsonObjectFromJS(const QV4::Value &value)
 {
-    return m_jsonWrapper.toJsonObject(value.get()->v4Value().asObject());
+    return m_jsonWrapper.toJsonObject(value.asObject());
 }
 
-v8::Local<v8::Array> QV8Engine::jsonArrayToJS(const QJsonArray &array)
+QV4::Value QV8Engine::jsonArrayToJS(const QJsonArray &array)
 {
-    return v8::Local<v8::Array>::New(v8::Value::fromV4Value(m_jsonWrapper.fromJsonArray(array)));
+    return m_jsonWrapper.fromJsonArray(array);
 }
 
-QJsonArray QV8Engine::jsonArrayFromJS(v8::Handle<v8::Value> value)
+QJsonArray QV8Engine::jsonArrayFromJS(const QV4::Value &value)
 {
-    return m_jsonWrapper.toJsonArray(value.get()->v4Value().asArrayObject());
+    return m_jsonWrapper.toJsonArray(value.asArrayObject());
 }
 
-bool QV8Engine::convertToNativeQObject(v8::Handle<v8::Value> value,
-                                                  const QByteArray &targetType,
-                                                  void **result)
+bool QV8Engine::convertToNativeQObject(const QV4::Value &value, const QByteArray &targetType, void **result)
 {
     if (!targetType.endsWith('*'))
         return false;
@@ -1361,12 +1356,12 @@ bool QV8Engine::convertToNativeQObject(v8::Handle<v8::Value> value,
     return false;
 }
 
-QObject *QV8Engine::qtObjectFromJS(v8::Handle<v8::Value> value)
+QObject *QV8Engine::qtObjectFromJS(const QV4::Value &value)
 {
-    if (!value->IsObject())
+    if (!value.isObject())
         return 0;
 
-    QV8ObjectResource *r = (QV8ObjectResource *)value->ToObject()->GetExternalResource();
+    QV8ObjectResource *r = (QV8ObjectResource *)v8::Value::fromV4Value(value)->ToObject()->GetExternalResource();
     if (!r)
         return 0;
     QV8ObjectResource::ResourceType type = r->resourceType();
@@ -1381,48 +1376,9 @@ QObject *QV8Engine::qtObjectFromJS(v8::Handle<v8::Value> value)
     return 0;
 }
 
-
-QVariant &QV8Engine::variantValue(v8::Handle<v8::Value> value)
-{
-    return variantWrapper()->variantValue(value);
-}
-
-// Creates a QVariant wrapper object.
-v8::Local<v8::Object> QV8Engine::newVariant(const QVariant &value)
-{
-    return variantWrapper()->newVariant(value);
-}
-
-QJSValue QV8Engine::evaluate(v8::Handle<v8::Script> script, v8::TryCatch& tryCatch)
-{
-    v8::HandleScope handleScope;
-
-    if (script.IsEmpty()) {
-        v8::Handle<v8::Value> exception = tryCatch.Exception();
-        if (exception.IsEmpty()) {
-            // This is possible on syntax errors like { a:12, b:21 } <- missing "(", ")" around expression.
-            return QJSValue();
-        }
-        return new QJSValuePrivate(m_v4Engine, exception.get()->v4Value());
-    }
-    v8::Handle<v8::Value> result;
-    result = script->Run();
-    if (result.IsEmpty()) {
-        v8::Handle<v8::Value> exception = tryCatch.Exception();
-        // TODO: figure out why v8 doesn't always produce an exception value
-        //Q_ASSERT(!exception.IsEmpty());
-        if (exception.IsEmpty())
-            exception = v8::Exception::Error(v8::String::New("missing exception value"));
-        return new QJSValuePrivate(m_v4Engine, exception.get()->v4Value());
-    }
-    return new QJSValuePrivate(m_v4Engine, result.get()->v4Value());
-}
-
-QJSValue QV8Engine::scriptValueFromInternal(v8::Handle<v8::Value> value) const
+QJSValue QV8Engine::scriptValueFromInternal(const QV4::Value &value) const
 {
-    if (value.IsEmpty())
-        return QJSValue();
-    return new QJSValuePrivate(m_v4Engine, value.get()->v4Value());
+    return new QJSValuePrivate(m_v4Engine, value);
 }
 
 QJSValue QV8Engine::newArray(uint length)
@@ -1580,21 +1536,6 @@ QQmlV4Handle QQmlV4Handle::fromValue(const QV4::Value &v)
     return handle;
 }
 
-QJSValue QV8Engine::evaluate(const QString& program, const QString& fileName, quint16 lineNumber)
-{
-    v8::TryCatch tryCatch;
-    v8::ScriptOrigin scriptOrigin(QJSConverter::toString(fileName), v8::Integer::New(lineNumber - 1));
-    v8::Handle<v8::Script> script;
-    script = v8::Script::Compile(QJSConverter::toString(program), &scriptOrigin);
-    if (script.IsEmpty()) {
-        // TODO: Why don't we get the exception, as with Script::Compile()?
-        // Q_ASSERT(tryCatch.HasCaught());
-        QV4::Object *error = m_v4Engine->newSyntaxErrorObject(m_v4Engine->current, 0);
-        return new QJSValuePrivate(m_v4Engine, QV4::Value::fromObject(error));
-    }
-    return evaluate(script, tryCatch);
-}
-
 QV4::Value QV8Engine::evaluateScript(const QString &script, QV4::Object *scopeObject)
 {
     QV4::ExecutionContext *ctx = m_v4Engine->current;
diff --git a/src/qml/qml/v8/qv8engine_p.h b/src/qml/qml/v8/qv8engine_p.h
index fe22b991e4..cc535acc87 100644
--- a/src/qml/qml/v8/qv8engine_p.h
+++ b/src/qml/qml/v8/qv8engine_p.h
@@ -283,17 +283,9 @@ public:
     void initQmlGlobalObject();
     void setEngine(QQmlEngine *engine);
     QQmlEngine *engine() { return m_engine; }
-    v8::Local<v8::Object> global() { return m_context->Global(); }
+    QV4::Value global();
     v8::Handle<v8::Context> context() const { return m_context; }
 
-//    inline void registerValue(QJSValuePrivate *data);
-//    inline void unregisterValue(QJSValuePrivate *data);
-//    inline void invalidateAllValues();
-
-//    inline void registerValueIterator(QJSValueIteratorPrivate *data);
-//    inline void unregisterValueIterator(QJSValueIteratorPrivate *data);
-//    inline void invalidateAllIterators();
-
     QV8ContextWrapper *contextWrapper() { return &m_contextWrapper; }
     QV8QObjectWrapper *qobjectWrapper() { return &m_qobjectWrapper; }
     QV8TypeWrapper *typeWrapper() { return &m_typeWrapper; }
@@ -312,7 +304,7 @@ public:
     QV4::Value getOwnPropertyNames(const QV4::Value &o);
     void freezeObject(const QV4::Value &value);
 
-    static inline bool startsWithUpper(v8::Handle<v8::String>);
+    static inline bool startsWithUpper(QV4::String *);
 
     QVariant toVariant(v8::Handle<v8::Value>, int typeHint);
     v8::Handle<v8::Value> fromVariant(const QVariant &);
@@ -339,20 +331,16 @@ public:
     v8::Local<v8::String> toString(const QString &string);
 
     // Create a new value type object
-    inline v8::Handle<v8::Value> newValueType(QObject *, int coreIndex, QQmlValueType *);
-    inline v8::Handle<v8::Value> newValueType(const QVariant &, QQmlValueType *);
-    inline bool isValueType(v8::Handle<v8::Value>) const;
-    inline QVariant toValueType(v8::Handle<v8::Value> obj);
+    inline QV4::Value newValueType(QObject *, int coreIndex, QQmlValueType *);
+    inline QV4::Value newValueType(const QVariant &, QQmlValueType *);
+    inline bool isValueType(const QV4::Value &value) const;
+    inline QVariant toValueType(const QV4::Value &obj);
 
     // Create a new sequence type object
-    inline v8::Handle<v8::Value> newSequence(int sequenceType, QObject *, int coreIndex, bool *succeeded);
-
-    // Create a new QVariant object.  This doesn't examine the type of the variant, but always returns
-    // a QVariant wrapper
-    inline v8::Handle<v8::Value> newQVariant(const QVariant &);
+    inline QV4::Value newSequence(int sequenceType, QObject *, int coreIndex, bool *succeeded);
 
     // Return the JS string key for the "function is a binding" flag
-    inline v8::Handle<v8::String> bindingFlagKey() const;
+    inline QV4::Value bindingFlagKey() const;
 
     // Return the network access manager for this engine.  By default this returns the network
     // access manager of the QQmlEngine.  It is overridden in the case of a threaded v8
@@ -365,8 +353,6 @@ public:
     inline void collectGarbage() { gc(); }
     void gc();
 
-    v8::Handle<v8::Value> throwException(v8::Handle<v8::Value> value);
-
 #ifdef QML_GLOBAL_HANDLE_DEBUGGING
     // Used for handle debugging
     static void registerHandle(void *);
@@ -379,12 +365,9 @@ public:
     inline Deletable *extensionData(int) const;
     void setExtensionData(int, Deletable *);
 
-    QJSValue evaluate(const QString &program, const QString &fileName = QString(), quint16 lineNumber = 1);
-    QJSValue evaluate(v8::Handle<v8::Script> script, v8::TryCatch& tryCatch);
     QV4::Value evaluateScript(const QString &script, QV4::Object *scopeObject = 0);
 
     QJSValue newArray(uint length);
-    v8::Local<v8::Object> newVariant(const QVariant &variant);
 
     QV4::Value variantListToJS(const QVariantList &lst);
     inline QVariantList variantListFromJS(QV4::ArrayObject *array)
@@ -398,23 +381,21 @@ public:
     inline QVariant variantFromJS(const QV4::Value &value)
     { V8ObjectSet visitedObjects; return variantFromJS(value, visitedObjects); }
 
-    v8::Handle<v8::Value> jsonValueToJS(const QJsonValue &value);
-    QJsonValue jsonValueFromJS(v8::Handle<v8::Value> value);
-    v8::Local<v8::Object> jsonObjectToJS(const QJsonObject &object);
-    QJsonObject jsonObjectFromJS(v8::Handle<v8::Value> value);
-    v8::Local<v8::Array> jsonArrayToJS(const QJsonArray &array);
-    QJsonArray jsonArrayFromJS(v8::Handle<v8::Value> value);
+    QV4::Value jsonValueToJS(const QJsonValue &value);
+    QJsonValue jsonValueFromJS(const QV4::Value &value);
+    QV4::Value jsonObjectToJS(const QJsonObject &object);
+    QJsonObject jsonObjectFromJS(const QV4::Value &value);
+    QV4::Value jsonArrayToJS(const QJsonArray &array);
+    QJsonArray jsonArrayFromJS(const QV4::Value &value);
 
     QV4::Value metaTypeToJS(int type, const void *data);
     bool metaTypeFromJS(const QV4::Value &value, int type, void *data);
 
-    bool convertToNativeQObject(v8::Handle<v8::Value> value,
+    bool convertToNativeQObject(const QV4::Value &value,
                                 const QByteArray &targetType,
                                 void **result);
 
-    QVariant &variantValue(v8::Handle<v8::Value> value);
-
-    QJSValue scriptValueFromInternal(v8::Handle<v8::Value>) const;
+    QJSValue scriptValueFromInternal(const QV4::Value &) const;
 
     // used for console.time(), console.timeEnd()
     void startTimer(const QString &timerName);
@@ -423,7 +404,7 @@ public:
     // used for console.count()
     int consoleCountHelper(const QString &file, quint16 line, quint16 column);
 
-    QObject *qtObjectFromJS(v8::Handle<v8::Value> value);
+    QObject *qtObjectFromJS(const QV4::Value &value);
 
     static QDateTime qtDateTimeFromJsDate(double jsDate);
 
@@ -459,7 +440,7 @@ protected:
     bool m_ownsV8Context;
     v8::Persistent<v8::Context> m_context;
 
-    v8::Persistent<v8::String> m_bindingFlagKey;
+    QV4::PersistentValue m_bindingFlagKey;
 
     QV8ContextWrapper m_contextWrapper;
     QV8QObjectWrapper m_qobjectWrapper;
@@ -583,43 +564,41 @@ v8::Handle<v8::Value> QV8Engine::newQObject(QObject *object, const ObjectOwnersh
     return result;
 }
 
-v8::Handle<v8::Value> QV8Engine::newValueType(QObject *object, int property, QQmlValueType *type)
+QV4::Value QV8Engine::newValueType(QObject *object, int property, QQmlValueType *type)
 {
-    return m_valueTypeWrapper.newValueType(object, property, type);
+    return m_valueTypeWrapper.newValueType(object, property, type)->v4Value();
 }
 
-v8::Handle<v8::Value> QV8Engine::newValueType(const QVariant &value, QQmlValueType *type)
+QV4::Value QV8Engine::newValueType(const QVariant &value, QQmlValueType *type)
 {
-    return m_valueTypeWrapper.newValueType(value, type);
+    return m_valueTypeWrapper.newValueType(value, type)->v4Value();
 }
 
-bool QV8Engine::isValueType(v8::Handle<v8::Value> obj) const
+bool QV8Engine::isValueType(const QV4::Value &value) const
 {
-    return obj->IsObject()?m_valueTypeWrapper.isValueType(v8::Handle<v8::Object>::Cast(obj)):false;
+    return value.isObject() ? m_valueTypeWrapper.isValueType(v8::Handle<v8::Object>::Cast(v8::Value::fromV4Value(value))) : false;
 }
 
-QVariant QV8Engine::toValueType(v8::Handle<v8::Value> obj)
+QVariant QV8Engine::toValueType(const QV4::Value &obj)
 {
-    return obj->IsObject()?m_valueTypeWrapper.toVariant(v8::Handle<v8::Object>::Cast(obj)):QVariant();
+    return obj.isObject() ? m_valueTypeWrapper.toVariant(v8::Handle<v8::Object>::Cast(v8::Value::fromV4Value(obj))) : QVariant();
 }
 
-v8::Handle<v8::Value> QV8Engine::newSequence(int sequenceType, QObject *object, int property, bool *succeeded)
+QV4::Value QV8Engine::newSequence(int sequenceType, QObject *object, int property, bool *succeeded)
 {
-    return m_sequenceWrapper.newSequence(sequenceType, object, property, succeeded);
+    return m_sequenceWrapper.newSequence(sequenceType, object, property, succeeded)->v4Value();
 }
 
-v8::Handle<v8::String> QV8Engine::bindingFlagKey() const
+QV4::Value QV8Engine::bindingFlagKey() const
 {
     return m_bindingFlagKey;
 }
 
 // XXX Can this be made more optimal?  It is called prior to resolving each and every 
 // unqualified name in QV8ContextWrapper.
-bool QV8Engine::startsWithUpper(v8::Handle<v8::String> string)
+bool QV8Engine::startsWithUpper(QV4::String *string)
 {
-    v8::String::Value value(string);
-    Q_ASSERT(*value != NULL);
-    uint16_t c = **value;
+    uint16_t c = string->toQString().at(0).unicode();
     return (c >= 'A' && c <= 'Z') ||
            (c > 127 && QChar::category(c) == QChar::Letter_Uppercase);
 }
diff --git a/src/qml/qml/v8/qv8include.cpp b/src/qml/qml/v8/qv8include.cpp
index b5ba87b718..eb897fa42f 100644
--- a/src/qml/qml/v8/qv8include.cpp
+++ b/src/qml/qml/v8/qv8include.cpp
@@ -96,7 +96,7 @@ void QV8Include::callback(QV8Engine *engine, v8::Handle<v8::Function> callback,
     if (!callback.IsEmpty()) {
         v8::Handle<v8::Value> args[] = { status };
         v8::TryCatch tc;
-        callback->Call(engine->global(), 1, args);
+        callback->Call(v8::Value::fromV4Value(engine->global()), 1, args);
     }
 }
 
diff --git a/src/qml/qml/v8/qv8qobjectwrapper.cpp b/src/qml/qml/v8/qv8qobjectwrapper.cpp
index db9ac6959b..444c2638cb 100644
--- a/src/qml/qml/v8/qv8qobjectwrapper.cpp
+++ b/src/qml/qml/v8/qv8qobjectwrapper.cpp
@@ -343,7 +343,7 @@ void QV8QObjectWrapper::init(QV8Engine *engine)
     v8::Local<v8::Function> fn = v8::Local<v8::Function>::Cast(script->Run());
     v8::Handle<v8::Value> invokeFn = v8::FunctionTemplate::New(Invoke)->GetFunction();
     v8::Handle<v8::Value> args[] = { invokeFn };
-    v8::Local<v8::Function> createFn = v8::Local<v8::Function>::Cast(fn->Call(engine->global(), 1, args));
+    v8::Local<v8::Function> createFn = v8::Local<v8::Function>::Cast(fn->Call(v8::Value::fromV4Value(engine->global()), 1, args));
     m_methodConstructor = qPersistentNew<v8::Function>(createFn);
     }
 
@@ -359,7 +359,8 @@ void QV8QObjectWrapper::init(QV8Engine *engine)
     }
 
     {
-    v8::Local<v8::Object> prototype = engine->global()->Get(v8::String::New("Function"))->ToObject()->Get(v8::String::New("prototype"))->ToObject();
+    v8::Local<v8::Object> prototype = v8::Local<v8::Object>::New(v8::Value::fromV4Value(engine->global()))
+            ->Get(v8::String::New("Function"))->ToObject()->Get(v8::String::New("prototype"))->ToObject();
     prototype->Set(v8::String::New("connect"), connect, v8::DontEnum);
     prototype->Set(v8::String::New("disconnect"), disconnect, v8::DontEnum);
     }
@@ -440,7 +441,7 @@ static v8::Handle<v8::Value> LoadProperty(QV8Engine *engine, QObject *object,
 
         if (QQmlValueTypeFactory::isValueType(v.userType())) {
             if (QQmlValueType *valueType = QQmlValueTypeFactory::valueType(v.userType()))
-                return engine->newValueType(object, property.coreIndex, valueType); // VariantReference value-type.
+                return v8::Value::fromV4Value(engine->newValueType(object, property.coreIndex, valueType)); // VariantReference value-type.
         }
 
         return engine->fromVariant(v);
@@ -448,14 +449,14 @@ static v8::Handle<v8::Value> LoadProperty(QV8Engine *engine, QObject *object,
         Q_ASSERT(notifier == 0);
 
         if (QQmlValueType *valueType = QQmlValueTypeFactory::valueType(property.propType))
-            return engine->newValueType(object, property.coreIndex, valueType);
+            return v8::Value::fromV4Value(engine->newValueType(object, property.coreIndex, valueType));
     } else {
         Q_ASSERT(notifier == 0);
 
         // see if it's a sequence type
         bool succeeded = false;
-        v8::Handle<v8::Value> retn = engine->newSequence(property.propType, object, property.coreIndex,
-                                                         &succeeded);
+        v8::Handle<v8::Value> retn = v8::Value::fromV4Value(engine->newSequence(property.propType, object, property.coreIndex,
+                                                         &succeeded));
         if (succeeded)
             return retn;
     }
@@ -489,7 +490,7 @@ v8::Handle<v8::Value> QV8QObjectWrapper::GetProperty(QV8Engine *engine, QObject
                v8::Integer::New(index)
            };
            Q_ASSERT(argv[0]->IsObject());
-           return engine->qobjectWrapper()->m_methodConstructor->Call(engine->global(), 2, argv);
+           return engine->qobjectWrapper()->m_methodConstructor->Call(v8::Value::fromV4Value(engine->global()), 2, argv);
        }
        static v8::Handle<v8::Value> createWithGlobal(QV8Engine *engine, QObject *object, 
                                                      v8::Handle<v8::Value> *objectHandle, 
@@ -500,7 +501,7 @@ v8::Handle<v8::Value> QV8QObjectWrapper::GetProperty(QV8Engine *engine, QObject
                v8::Context::GetCallingQmlGlobal()
            };
            Q_ASSERT(argv[0]->IsObject());
-           return engine->qobjectWrapper()->m_methodConstructor->Call(engine->global(), 3, argv);
+           return engine->qobjectWrapper()->m_methodConstructor->Call(v8::Value::fromV4Value(engine->global()), 3, argv);
        }
     };
 
@@ -596,7 +597,7 @@ static inline void StoreProperty(QV8Engine *engine, QObject *object, QQmlPropert
 {
     QQmlBinding *newBinding = 0;
     if (value->IsFunction()) {
-        if (value->ToObject()->GetHiddenValue(engine->bindingFlagKey()).IsEmpty()) {
+        if (value->ToObject()->GetHiddenValue(v8::Value::fromV4Value(engine->bindingFlagKey())).IsEmpty()) {
             if (!property->isVarProperty() && property->propType != qMetaTypeId<QJSValue>()) {
                 // assigning a JS function to a non var or QJSValue property or is not allowed.
                 QString error = QLatin1String("Cannot assign JavaScript function to ");
@@ -657,7 +658,7 @@ static inline void StoreProperty(QV8Engine *engine, QObject *object, QQmlPropert
     } else if (value->IsUndefined() && property->propType == QMetaType::QJsonValue) {
         PROPERTY_STORE(QJsonValue, QJsonValue(QJsonValue::Undefined));
     } else if (!newBinding && property->propType == qMetaTypeId<QJSValue>()) {
-        PROPERTY_STORE(QJSValue, engine->scriptValueFromInternal(value));
+        PROPERTY_STORE(QJSValue, engine->scriptValueFromInternal(value->v4Value()));
     } else if (value->IsUndefined()) {
         QString error = QLatin1String("Cannot assign [undefined] to ");
         if (!QMetaType::typeName(property->propType))
@@ -763,7 +764,7 @@ v8::Handle<v8::Value> QV8QObjectWrapper::Getter(v8::Local<v8::String> property,
     if (!result.IsEmpty())
         return result;
 
-    if (QV8Engine::startsWithUpper(property)) {
+    if (QV8Engine::startsWithUpper(property->v4Value().asString())) {
         // Check for attached properties
         if (context && context->imports) {
             QQmlTypeNameCache::Result r = context->imports->query(propertystring);
@@ -1203,7 +1204,7 @@ QPair<QObject *, int> QV8QObjectWrapper::ExtractQtMethod(QV8Engine *engine, v8::
 
         // This is one of our special QObject method wrappers
         v8::Handle<v8::Value> args[] = { engine->qobjectWrapper()->m_hiddenObject };
-        v8::Local<v8::Value> data = function->Call(engine->global(), 1, args);
+        v8::Local<v8::Value> data = function->Call(v8::Value::fromV4Value(engine->global()), 1, args);
 
         if (data->IsArray()) {
             v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(data);
@@ -1330,7 +1331,7 @@ int QV8QObjectConnectionList::qt_metacall(QMetaObject::Call method, int index, v
 
             v8::TryCatch try_catch;
             if (connection.thisObject.IsEmpty()) {
-                connection.function->Call(engine->global(), argCount, args.data());
+                connection.function->Call(v8::Value::fromV4Value(engine->global()), argCount, args.data());
             } else {
                 connection.function->Call(connection.thisObject, argCount, args.data());
             }
@@ -2187,13 +2188,13 @@ void CallArgument::fromValue(int callType, QV8Engine *engine, v8::Handle<v8::Val
         handlePtr = new (&allocData) QQmlV4Handle(QQmlV4Handle::fromV8Handle(value));
         type = callType;
     } else if (callType == QMetaType::QJsonArray) {
-        jsonArrayPtr = new (&allocData) QJsonArray(engine->jsonArrayFromJS(value));
+        jsonArrayPtr = new (&allocData) QJsonArray(engine->jsonArrayFromJS(value->v4Value()));
         type = callType;
     } else if (callType == QMetaType::QJsonObject) {
-        jsonObjectPtr = new (&allocData) QJsonObject(engine->jsonObjectFromJS(value));
+        jsonObjectPtr = new (&allocData) QJsonObject(engine->jsonObjectFromJS(value->v4Value()));
         type = callType;
     } else if (callType == QMetaType::QJsonValue) {
-        jsonValuePtr = new (&allocData) QJsonValue(engine->jsonValueFromJS(value));
+        jsonValuePtr = new (&allocData) QJsonValue(engine->jsonValueFromJS(value->v4Value()));
         type = callType;
     } else if (callType == QMetaType::Void) {
         *qvariantPtr = QVariant();
@@ -2261,11 +2262,11 @@ v8::Handle<v8::Value> CallArgument::toValue(QV8Engine *engine)
     } else if (type == qMetaTypeId<QQmlV4Handle>()) {
         return handlePtr->toV8Handle();
     } else if (type == QMetaType::QJsonArray) {
-        return engine->jsonArrayToJS(*jsonArrayPtr);
+        return v8::Value::fromV4Value(engine->jsonArrayToJS(*jsonArrayPtr));
     } else if (type == QMetaType::QJsonObject) {
-        return engine->jsonObjectToJS(*jsonObjectPtr);
+        return v8::Value::fromV4Value(engine->jsonObjectToJS(*jsonObjectPtr));
     } else if (type == QMetaType::QJsonValue) {
-        return engine->jsonValueToJS(*jsonValuePtr);
+        return v8::Value::fromV4Value(engine->jsonValueToJS(*jsonValuePtr));
     } else if (type == -1 || type == qMetaTypeId<QVariant>()) {
         QVariant value = *qvariantPtr;
         v8::Handle<v8::Value> rv = engine->fromVariant(value);
diff --git a/src/qml/qml/v8/qv8sequencewrapper_p_p.h b/src/qml/qml/v8/qv8sequencewrapper_p_p.h
index 0c486b8321..80f68c4674 100644
--- a/src/qml/qml/v8/qv8sequencewrapper_p_p.h
+++ b/src/qml/qml/v8/qv8sequencewrapper_p_p.h
@@ -482,7 +482,7 @@ static QString convertUrlToString(QV8Engine *, const QUrl &v)
                 bool operator()(SequenceElementType e0, SequenceElementType e1) \
                 { \
                     v8::Handle<v8::Value> argv[2] = { eng->fromVariant(e0), eng->fromVariant(e1) }; \
-                    v8::Handle<v8::Value> compareValue = jsFn->Call(eng->global(), 2, argv); \
+                    v8::Handle<v8::Value> compareValue = jsFn->Call(v8::Value::fromV4Value(eng->global()), 2, argv); \
                     return compareValue->NumberValue() < 0; \
                 } \
             private: \
diff --git a/src/qml/qml/v8/qv8typewrapper.cpp b/src/qml/qml/v8/qv8typewrapper.cpp
index 6ebee592c0..61ac4f9007 100644
--- a/src/qml/qml/v8/qv8typewrapper.cpp
+++ b/src/qml/qml/v8/qv8typewrapper.cpp
@@ -174,7 +174,7 @@ v8::Handle<v8::Value> QV8TypeWrapper::Getter(v8::Local<v8::String> property,
             QObject *qobjectSingleton = siinfo->qobjectApi(e);
             if (qobjectSingleton) {
                 // check for enum value
-                if (QV8Engine::startsWithUpper(property)) {
+                if (QV8Engine::startsWithUpper(property->v4Value().asString())) {
                     if (resource->mode == IncludeEnums) {
                         QString name = property->v4Value().toQString();
 
@@ -207,7 +207,7 @@ v8::Handle<v8::Value> QV8TypeWrapper::Getter(v8::Local<v8::String> property,
 
         } else {
 
-            if (QV8Engine::startsWithUpper(property)) {
+            if (QV8Engine::startsWithUpper(property->v4Value().asString())) {
                 bool ok = false;
                 int value = type->enumValue(propertystring, &ok);
                 if (ok)
diff --git a/src/qml/qml/v8/qv8valuetypewrapper.cpp b/src/qml/qml/v8/qv8valuetypewrapper.cpp
index 0e9984316c..30fe193137 100644
--- a/src/qml/qml/v8/qv8valuetypewrapper.cpp
+++ b/src/qml/qml/v8/qv8valuetypewrapper.cpp
@@ -373,7 +373,7 @@ v8::Handle<v8::Value> QV8ValueTypeWrapper::Setter(v8::Local<v8::String> property
         QQmlBinding *newBinding = 0;
 
         if (value->IsFunction()) {
-            if (value->ToObject()->GetHiddenValue(r->engine->bindingFlagKey()).IsEmpty()) {
+            if (value->ToObject()->GetHiddenValue(v8::Value::fromV4Value(r->engine->bindingFlagKey())).IsEmpty()) {
                 // assigning a JS function to a non-var-property is not allowed.
                 QString error = QLatin1String("Cannot assign JavaScript function to value-type property");
                 v8::ThrowException(v8::Exception::Error(r->engine->toString(error)));
diff --git a/src/qml/types/qquickworkerscript.cpp b/src/qml/types/qquickworkerscript.cpp
index 474fdb0362..237805db88 100644
--- a/src/qml/types/qquickworkerscript.cpp
+++ b/src/qml/types/qquickworkerscript.cpp
@@ -237,7 +237,7 @@ void QQuickWorkerScriptEnginePrivate::WorkerEngine::init()
     v8::Handle<v8::Value> args[] = { 
         V8FUNCTION(QQuickWorkerScriptEnginePrivate::sendMessage, this)
     };
-    v8::Local<v8::Value> createsendvalue = createsendconstructor->Call(global(), 1, args);
+    v8::Local<v8::Value> createsendvalue = createsendconstructor->Call(v8::Value::fromV4Value(global()), 1, args);
     
     createsend = qPersistentNew<v8::Function>(v8::Handle<v8::Function>::Cast(createsendvalue));
     }
@@ -247,7 +247,7 @@ void QQuickWorkerScriptEnginePrivate::WorkerEngine::init()
 v8::Local<v8::Function> QQuickWorkerScriptEnginePrivate::WorkerEngine::sendFunction(int id)
 {
     v8::Handle<v8::Value> args[] = { v8::Integer::New(id) };
-    return v8::Local<v8::Function>::Cast(createsend->Call(global(), 1, args));
+    return v8::Local<v8::Function>::Cast(createsend->Call(v8::Value::fromV4Value(global()), 1, args));
 }
 
 // Requires handle and context scope
@@ -255,7 +255,7 @@ void QQuickWorkerScriptEnginePrivate::WorkerEngine::callOnMessage(v8::Handle<v8:
                                                                         v8::Handle<v8::Value> arg)
 {
     v8::Handle<v8::Value> args[] = { object, arg };
-    onmessage->Call(global(), 2, args);
+    onmessage->Call(v8::Value::fromV4Value(global()), 2, args);
 }
 
 QNetworkAccessManager *QQuickWorkerScriptEnginePrivate::WorkerEngine::networkAccessManager()