Add QScriptDeclarativeClass

QScriptDeclarativeClass is a private, but exported, class used by the
declarativeui module.  It is very similar to QScriptClass, but slightly
faster and provides a couple of "backdoor" extension mechanisms used
by declarative.

Reviewed-by: Warwick Allison

9 files changed, 826 insertions, 6 deletions

diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index f41b4e2..216f325 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -2299,7 +2299,8 @@ QScriptContext *QScriptEngine::pushContext()
    return the new top frame. (might be the same as exec if a new stackframe was not needed) or 0 if stack overflow
 */
 JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSValue _thisObject,
-                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor)
+                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor,
+                                                  bool clearScopeChain)
 {
     JSC::JSValue thisObject = _thisObject;
     if (calledAsConstructor) {
@@ -2333,7 +2334,14 @@ JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSV
         for (it = args.begin(); it != args.end(); ++it)
             newCallFrame[++dst] = *it;
         newCallFrame += argc + JSC::RegisterFile::CallFrameHeaderSize;
-        newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
+
+        if (!clearScopeChain) {
+            newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
+        } else {
+            JSC::JSObject *jscObject = originalGlobalObject();
+            JSC::ScopeChainNode *scn = new JSC::ScopeChainNode(0, jscObject, &exec->globalData(), jscObject);
+            newCallFrame->init(0, /*vPC=*/0, scn, exec, flags | ShouldRestoreCallFrame, argc, callee);
+        }
     } else {
         setContextFlags(newCallFrame, flags);
 #if ENABLE(JIT)
diff --git a/src/script/api/qscriptengine_p.h b/src/script/api/qscriptengine_p.h
index d12b0f4..e7cdcda 100644
--- a/src/script/api/qscriptengine_p.h
+++ b/src/script/api/qscriptengine_p.h
@@ -174,7 +174,7 @@ public:
     static JSC::Register *thisRegisterForFrame(JSC::ExecState *frame);
 
     JSC::CallFrame *pushContext(JSC::CallFrame *exec, JSC::JSValue thisObject, const JSC::ArgList& args,
-                                JSC::JSObject *callee, bool calledAsConstructor = false);
+                                JSC::JSObject *callee, bool calledAsConstructor = false, bool clearScopeChain = false);
     void popContext();
 
     void mark(JSC::MarkStack& markStack);
diff --git a/src/script/api/qscriptvalue.cpp b/src/script/api/qscriptvalue.cpp
index 52a1e6d..d6cbb41 100644
--- a/src/script/api/qscriptvalue.cpp
+++ b/src/script/api/qscriptvalue.cpp
@@ -71,6 +71,7 @@
 #include "bridge/qscriptclassobject_p.h"
 #include "bridge/qscriptvariant_p.h"
 #include "bridge/qscriptqobject_p.h"
+#include "bridge/qscriptdeclarativeclass_p.h"
 
 /*!
   \since 4.3
@@ -1496,6 +1497,8 @@ QVariant QScriptValue::toVariant() const
 #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;
@@ -1586,6 +1589,8 @@ QObject *QScriptValue::toQObject() const
     if (isQObject()) {
         QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
         return static_cast<QScript::QObjectDelegate*>(object->delegate())->value();
+    } else if (QScriptDeclarativeClass *dc = QScriptDeclarativeClass::scriptClass(*this)) {
+        return dc->toQObject(QScriptDeclarativeClass::object(*this));
     } else if (isVariant()) {
         QVariant var = toVariant();
         int type = var.userType();
diff --git a/src/script/bridge/bridge.pri b/src/script/bridge/bridge.pri
index 666a07e..09e2dfb 100644
--- a/src/script/bridge/bridge.pri
+++ b/src/script/bridge/bridge.pri
@@ -5,7 +5,9 @@ SOURCES += \
     $$PWD/qscriptvariant.cpp \
     $$PWD/qscriptqobject.cpp \
     $$PWD/qscriptglobalobject.cpp \
-    $$PWD/qscriptactivationobject.cpp
+    $$PWD/qscriptactivationobject.cpp \
+    $$PWD/qscriptdeclarativeobject.cpp \
+    $$PWD/qscriptdeclarativeclass.cpp 
 
 HEADERS += \
     $$PWD/qscriptfunction_p.h \
@@ -14,4 +16,6 @@ HEADERS += \
     $$PWD/qscriptvariant_p.h \
     $$PWD/qscriptqobject_p.h \
     $$PWD/qscriptglobalobject_p.h \
-    $$PWD/qscriptactivationobject_p.h
+    $$PWD/qscriptactivationobject_p.h \
+    $$PWD/qscriptdeclarativeobject_p.h \
+    $$PWD/qscriptdeclarativeclass_p.h
diff --git a/src/script/bridge/qscriptdeclarativeclass.cpp b/src/script/bridge/qscriptdeclarativeclass.cpp
new file mode 100644
index 0000000..b5d9bf5
--- /dev/null
+++ b/src/script/bridge/qscriptdeclarativeclass.cpp
@@ -0,0 +1,356 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qscriptdeclarativeclass_p.h"
+#include "qscriptdeclarativeobject_p.h"
+#include "qscriptobject_p.h"
+#include <QtScript/qscriptstring.h>
+#include <QtScript/qscriptengine.h>
+#include <QtScript/qscriptengineagent.h>
+#include <private/qscriptengine_p.h>
+#include <private/qscriptvalue_p.h>
+#include <private/qscriptqobject_p.h>
+#include <private/qscriptactivationobject_p.h>
+#include <QtCore/qstringlist.h>
+
+QT_BEGIN_NAMESPACE
+
+QScriptDeclarativeClass::PersistentIdentifier::PersistentIdentifier()
+{
+    new (&d) JSC::Identifier();
+}
+
+QScriptDeclarativeClass::PersistentIdentifier::~PersistentIdentifier()
+{
+    ((JSC::Identifier &)d).JSC::Identifier::~Identifier();
+}
+
+QScriptDeclarativeClass::PersistentIdentifier::PersistentIdentifier(const PersistentIdentifier &other)
+{
+    identifier = other.identifier;
+    new (&d) JSC::Identifier((JSC::Identifier &)(other.d));
+}
+
+QScriptDeclarativeClass::PersistentIdentifier &
+QScriptDeclarativeClass::PersistentIdentifier::operator=(const PersistentIdentifier &other)
+{
+    identifier = other.identifier;
+    ((JSC::Identifier &)d) = (JSC::Identifier &)(other.d);
+    return *this;
+}
+
+QScriptDeclarativeClass::QScriptDeclarativeClass(QScriptEngine *engine)
+: d_ptr(new QScriptDeclarativeClassPrivate)
+{
+    Q_ASSERT(sizeof(void*) == sizeof(JSC::Identifier));
+    d_ptr->q_ptr = this;
+    d_ptr->engine = engine;
+}
+
+QScriptValue QScriptDeclarativeClass::newObject(QScriptEngine *engine, 
+                                                QScriptDeclarativeClass *scriptClass, 
+                                                Object *object)
+{
+    Q_ASSERT(engine);
+    Q_ASSERT(scriptClass);
+
+    QScriptEnginePrivate *p = static_cast<QScriptEnginePrivate *>(QObjectPrivate::get(engine)); 
+
+    JSC::ExecState* exec = p->currentFrame;
+    QScriptObject *result = new (exec) QScriptObject(p->scriptObjectStructure);
+    result->setDelegate(new QScript::DeclarativeObjectDelegate(scriptClass, object));
+    return p->scriptValueFromJSCValue(result);
+}
+
+QScriptDeclarativeClass *QScriptDeclarativeClass::scriptClass(const QScriptValue &v)
+{
+    QScriptValuePrivate *d = QScriptValuePrivate::get(v);
+    if (!d || !d->isJSC() || !d->jscValue.inherits(&QScriptObject::info))
+        return 0;
+    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
+    QScriptObjectDelegate *delegate = scriptObject->delegate();
+    if (!delegate || (delegate->type() != QScriptObjectDelegate::DeclarativeClassObject))
+        return 0;
+    return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass();
+}
+
+QScriptDeclarativeClass::Object *QScriptDeclarativeClass::object(const QScriptValue &v)
+{
+    QScriptValuePrivate *d = QScriptValuePrivate::get(v);
+    if (!d || !d->isJSC() || !d->jscValue.inherits(&QScriptObject::info))
+        return 0;
+    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
+    QScriptObjectDelegate *delegate = scriptObject->delegate();
+    if (!delegate || (delegate->type() != QScriptObjectDelegate::DeclarativeClassObject))
+        return 0;
+    return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->object();
+}
+
+QScriptValue QScriptDeclarativeClass::function(const QScriptValue &v, const Identifier &name)
+{
+    QScriptValuePrivate *d = QScriptValuePrivate::get(v);
+
+    if (!d->isObject())
+        return QScriptValue();
+
+    JSC::ExecState *exec = d->engine->currentFrame;
+    JSC::JSObject *object = d->jscValue.getObject();
+    JSC::PropertySlot slot(const_cast<JSC::JSObject*>(object));
+    JSC::JSValue result;
+
+    JSC::Identifier id(exec, (JSC::UString::Rep *)name);
+
+    if (const_cast<JSC::JSObject*>(object)->getOwnPropertySlot(exec, id, slot)) {
+        result = slot.getValue(exec, id);
+        if (QScript::isFunction(result))
+            return d->engine->scriptValueFromJSCValue(result);
+    }
+
+    return QScriptValue();
+}
+
+QScriptValue QScriptDeclarativeClass::property(const QScriptValue &v, const Identifier &name)
+{
+    QScriptValuePrivate *d = QScriptValuePrivate::get(v);
+
+    if (!d->isObject())
+        return QScriptValue();
+
+    JSC::ExecState *exec = d->engine->currentFrame;
+    JSC::JSObject *object = d->jscValue.getObject();
+    JSC::PropertySlot slot(const_cast<JSC::JSObject*>(object));
+    JSC::JSValue result;
+
+    JSC::Identifier id(exec, (JSC::UString::Rep *)name);
+
+    if (const_cast<JSC::JSObject*>(object)->getOwnPropertySlot(exec, id, slot)) {
+        result = slot.getValue(exec, id);
+        return d->engine->scriptValueFromJSCValue(result);
+    }
+
+    return QScriptValue();
+}
+
+/*
+Returns the scope chain entry at \a index.  If index is less than 0, returns
+entries starting at the end.  For example, scopeChainValue(context, -1) will return
+the value last in the scope chain.
+*/
+QScriptValue QScriptDeclarativeClass::scopeChainValue(QScriptContext *context, int index)
+{
+    context->activationObject(); //ensure the creation of the normal scope for native context
+    const JSC::CallFrame *frame = QScriptEnginePrivate::frameForContext(context);
+    QScriptEnginePrivate *engine = QScript::scriptEngineFromExec(frame);
+
+    JSC::ScopeChainNode *node = frame->scopeChain();
+    JSC::ScopeChainIterator it(node);
+
+    if (index < 0) {
+        int count = 0;
+        for (it = node->begin(); it != node->end(); ++it) 
+            ++count;
+
+        index = qAbs(index);
+        if (index > count)
+            return QScriptValue();
+        else
+            index = count - index;
+    }
+
+    for (it = node->begin(); it != node->end(); ++it) {
+
+        if (index == 0) {
+
+            JSC::JSObject *object = *it;
+            if (!object) return QScriptValue();
+
+            if (object->inherits(&QScript::QScriptActivationObject::info)
+                    && (static_cast<QScript::QScriptActivationObject*>(object)->delegate() != 0)) {
+                // Return the object that property access is being delegated to
+                object = static_cast<QScript::QScriptActivationObject*>(object)->delegate();
+            }
+            return engine->scriptValueFromJSCValue(object);
+
+        } else {
+            --index;
+        }
+
+    }
+
+    return QScriptValue();
+}
+
+/*!
+  Enters a new execution context and returns the associated
+  QScriptContext object.
+
+  Once you are done with the context, you should call popContext() to
+  restore the old context.
+
+  By default, the `this' object of the new context is the Global Object.
+  The context's \l{QScriptContext::callee()}{callee}() will be invalid.
+
+  Unlike pushContext(), the default scope chain is reset to include
+  only the global object and the QScriptContext's activation object.
+
+  \sa QScriptEngine::popContext()
+*/
+QScriptContext * QScriptDeclarativeClass::pushCleanContext(QScriptEngine *engine)
+{
+    if (!engine)
+        return 0;
+
+    QScriptEnginePrivate *d = QScriptEnginePrivate::get(engine);
+
+    JSC::CallFrame* newFrame = d->pushContext(d->currentFrame, 
+                                              d->currentFrame->globalData().dynamicGlobalObject,
+                                              JSC::ArgList(), /*callee = */0, false, true);
+
+    if (engine->agent())
+        engine->agent()->contextPush();
+
+    return d->contextForFrame(newFrame);
+}
+
+QScriptDeclarativeClass::~QScriptDeclarativeClass()
+{
+}
+
+QScriptEngine *QScriptDeclarativeClass::engine() const
+{
+    return d_ptr->engine;
+}
+
+QScriptDeclarativeClass::PersistentIdentifier 
+QScriptDeclarativeClass::createPersistentIdentifier(const QString &str)
+{
+    QScriptEnginePrivate *p = 
+        static_cast<QScriptEnginePrivate *>(QObjectPrivate::get(d_ptr->engine)); 
+    JSC::ExecState* exec = p->currentFrame;
+
+    PersistentIdentifier rv(true);
+    new (&rv.d) JSC::Identifier(exec, (UChar *)str.constData(), str.size());
+    rv.identifier = (void *)((JSC::Identifier &)rv.d).ustring().rep();
+    return rv;
+}
+
+QScriptDeclarativeClass::PersistentIdentifier 
+QScriptDeclarativeClass::createPersistentIdentifier(const Identifier &id)
+{
+    QScriptEnginePrivate *p = 
+        static_cast<QScriptEnginePrivate *>(QObjectPrivate::get(d_ptr->engine)); 
+    JSC::ExecState* exec = p->currentFrame;
+
+    PersistentIdentifier rv(true);
+    new (&rv.d) JSC::Identifier(exec, (JSC::UString::Rep *)id);
+    rv.identifier = (void *)((JSC::Identifier &)rv.d).ustring().rep();
+    return rv;
+}
+
+QString QScriptDeclarativeClass::toString(const Identifier &identifier)
+{
+    JSC::UString::Rep *r = (JSC::UString::Rep *)identifier;
+    return QString((QChar *)r->data(), r->size());
+}
+
+quint32 QScriptDeclarativeClass::toArrayIndex(const Identifier &identifier, bool *ok)
+{
+    JSC::UString::Rep *r = (JSC::UString::Rep *)identifier;
+    JSC::UString s(r);
+    return s.toArrayIndex(ok);
+}
+
+QScriptClass::QueryFlags 
+QScriptDeclarativeClass::queryProperty(Object *object, const Identifier &name, 
+                                       QScriptClass::QueryFlags flags)
+{
+    Q_UNUSED(object);
+    Q_UNUSED(name);
+    Q_UNUSED(flags);
+    return 0;
+}
+
+QScriptValue QScriptDeclarativeClass::property(Object *object, const Identifier &name)
+{
+    Q_UNUSED(object);
+    Q_UNUSED(name);
+    return QScriptValue();
+}
+
+void QScriptDeclarativeClass::setProperty(Object *object, const Identifier &name, 
+                                          const QScriptValue &value)
+{
+    Q_UNUSED(object);
+    Q_UNUSED(name);
+    Q_UNUSED(value);
+}
+
+QScriptValue::PropertyFlags 
+QScriptDeclarativeClass::propertyFlags(Object *object, const Identifier &name)
+{
+    Q_UNUSED(object);
+    Q_UNUSED(name);
+    return 0;
+}
+
+QStringList QScriptDeclarativeClass::propertyNames(Object *object)
+{
+    Q_UNUSED(object);
+    return QStringList();
+}
+
+QObject *QScriptDeclarativeClass::toQObject(Object *, bool *ok)
+{
+    if (ok) *ok = false;
+    return 0;
+}
+
+QVariant QScriptDeclarativeClass::toVariant(Object *, bool *ok)
+{
+    if (ok) *ok = false;
+    return QVariant();
+}
+
+QScriptContext *QScriptDeclarativeClass::context() const
+{
+    return d_ptr->context;
+}
+
diff --git a/src/script/bridge/qscriptdeclarativeclass_p.h b/src/script/bridge/qscriptdeclarativeclass_p.h
new file mode 100644
index 0000000..d0e653d
--- /dev/null
+++ b/src/script/bridge/qscriptdeclarativeclass_p.h
@@ -0,0 +1,129 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSCRIPTDECLARATIVECLASS_P_H
+#define QSCRIPTDECLARATIVECLASS_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qobjectdefs.h>
+#include <QtScript/qscriptvalue.h>
+#include <QtScript/qscriptclass.h>
+
+QT_BEGIN_NAMESPACE
+
+class QScriptDeclarativeClassPrivate;
+class PersistentIdentifierPrivate;
+class QScriptContext;
+class Q_SCRIPT_EXPORT QScriptDeclarativeClass
+{
+public:
+    typedef void* Identifier;
+
+    struct Object { virtual ~Object() {} };
+
+    static QScriptValue newObject(QScriptEngine *, QScriptDeclarativeClass *, Object *);
+    static QScriptDeclarativeClass *scriptClass(const QScriptValue &);
+    static Object *object(const QScriptValue &);
+
+    static QScriptValue function(const QScriptValue &, const Identifier &);
+    static QScriptValue property(const QScriptValue &, const Identifier &);
+
+    static QScriptValue scopeChainValue(QScriptContext *, int index);
+    static QScriptContext *pushCleanContext(QScriptEngine *);
+
+    class Q_SCRIPT_EXPORT PersistentIdentifier 
+    {
+    public:
+        Identifier identifier;
+
+        PersistentIdentifier();
+        ~PersistentIdentifier();
+        PersistentIdentifier(const PersistentIdentifier &other);
+        PersistentIdentifier &operator=(const PersistentIdentifier &other);
+
+    private:
+        friend class QScriptDeclarativeClass;
+        PersistentIdentifier(bool) : identifier(0), d(0) {}
+        void *d;
+    };
+
+    QScriptDeclarativeClass(QScriptEngine *engine);
+    virtual ~QScriptDeclarativeClass();
+
+    QScriptEngine *engine() const;
+
+    PersistentIdentifier createPersistentIdentifier(const QString &);
+    PersistentIdentifier createPersistentIdentifier(const Identifier &);
+
+    QString toString(const Identifier &);
+    quint32 toArrayIndex(const Identifier &, bool *ok);
+
+    virtual QScriptClass::QueryFlags queryProperty(Object *, const Identifier &, 
+                                                   QScriptClass::QueryFlags flags);
+
+    virtual QScriptValue property(Object *, const Identifier &);
+    virtual void setProperty(Object *, const Identifier &name, const QScriptValue &);
+    virtual QScriptValue::PropertyFlags propertyFlags(Object *, const Identifier &);
+
+    virtual QStringList propertyNames(Object *);
+
+    virtual QObject *toQObject(Object *, bool *ok = 0);
+    virtual QVariant toVariant(Object *, bool *ok = 0);
+
+    QScriptContext *context() const;
+protected:
+    friend class QScriptDeclarativeClassPrivate;
+    QScopedPointer<QScriptDeclarativeClassPrivate> d_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/script/bridge/qscriptdeclarativeobject.cpp b/src/script/bridge/qscriptdeclarativeobject.cpp
new file mode 100644
index 0000000..1af632d
--- /dev/null
+++ b/src/script/bridge/qscriptdeclarativeobject.cpp
@@ -0,0 +1,192 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "config.h"
+#include "qscriptdeclarativeobject_p.h"
+
+#include "../api/qscriptengine.h"
+#include "../api/qscriptengine_p.h"
+#include "../api/qscriptcontext.h"
+#include "../api/qscriptcontext_p.h"
+#include "../api/qscriptclass.h"
+#include "../api/qscriptclasspropertyiterator.h"
+
+#include "Error.h"
+#include "PropertyNameArray.h"
+
+#include <QtCore/qstringlist.h>
+
+Q_DECLARE_METATYPE(QScriptContext*)
+Q_DECLARE_METATYPE(QScriptValue)
+Q_DECLARE_METATYPE(QScriptValueList)
+
+QT_BEGIN_NAMESPACE
+
+namespace QScript
+{
+
+DeclarativeObjectDelegate::DeclarativeObjectDelegate(QScriptDeclarativeClass *c, 
+                                                     QScriptDeclarativeClass::Object *o)
+: m_class(c), m_object(o)
+{
+}
+
+DeclarativeObjectDelegate::~DeclarativeObjectDelegate()
+{
+    delete m_object;
+}
+
+QScriptObjectDelegate::Type DeclarativeObjectDelegate::type() const
+{
+    return DeclarativeClassObject;
+}
+
+bool DeclarativeObjectDelegate::getOwnPropertySlot(QScriptObject* object,
+                                                   JSC::ExecState *exec,
+                                                   const JSC::Identifier &propertyName,
+                                                   JSC::PropertySlot &slot)
+{
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScriptDeclarativeClass::Identifier identifier = (void *)propertyName.ustring().rep();
+
+    QScriptDeclarativeClassPrivate *p = QScriptDeclarativeClassPrivate::get(m_class);
+    p->context = reinterpret_cast<QScriptContext *>(exec);
+    QScriptClass::QueryFlags flags = 
+        m_class->queryProperty(m_object, identifier, QScriptClass::HandlesReadAccess);
+    if (flags & QScriptClass::HandlesReadAccess) {
+        QScriptValue value = m_class->property(m_object, identifier);
+        p->context = 0;
+        slot.setValue(engine->scriptValueToJSCValue(value));
+        return true;
+    }
+    p->context = 0;
+
+    return QScriptObjectDelegate::getOwnPropertySlot(object, exec, propertyName, slot);
+}
+
+void DeclarativeObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
+                                    const JSC::Identifier &propertyName,
+                                    JSC::JSValue value, JSC::PutPropertySlot &slot)
+{
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScriptDeclarativeClass::Identifier identifier = (void *)propertyName.ustring().rep();
+
+    QScriptDeclarativeClassPrivate *p = QScriptDeclarativeClassPrivate::get(m_class);
+    p->context = reinterpret_cast<QScriptContext *>(exec);
+    QScriptClass::QueryFlags flags = 
+        m_class->queryProperty(m_object, identifier, QScriptClass::HandlesWriteAccess);
+    if (flags & QScriptClass::HandlesWriteAccess) {
+        m_class->setProperty(m_object, identifier, engine->scriptValueFromJSCValue(value));
+        p->context = 0;
+        return;
+    }
+    p->context = 0;
+
+    QScriptObjectDelegate::put(object, exec, propertyName, value, slot);
+}
+
+bool DeclarativeObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *exec,
+                                               const JSC::Identifier &propertyName,
+                                               bool checkDontDelete)
+{
+    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName, checkDontDelete);
+}
+
+bool DeclarativeObjectDelegate::getPropertyAttributes(const QScriptObject* object, 
+                                                      JSC::ExecState *exec,
+                                                      const JSC::Identifier &propertyName,
+                                                      unsigned &attribs) const
+{
+    QScriptDeclarativeClass::Identifier identifier = (void *)propertyName.ustring().rep();
+
+    QScriptClass::QueryFlags flags = 
+        m_class->queryProperty(m_object, identifier, QScriptClass::HandlesReadAccess);
+    if (flags & QScriptClass::HandlesReadAccess) {
+        QScriptValue::PropertyFlags flags = m_class->propertyFlags(m_object, identifier);
+        attribs = 0;
+        if (flags & QScriptValue::ReadOnly)
+            attribs |= JSC::ReadOnly;
+        if (flags & QScriptValue::SkipInEnumeration)
+            attribs |= JSC::DontEnum;
+        if (flags & QScriptValue::Undeletable)
+            attribs |= JSC::DontDelete;
+        if (flags & QScriptValue::PropertyGetter)
+            attribs |= JSC::Getter;
+        if (flags & QScriptValue::PropertySetter)
+            attribs |= JSC::Setter;
+        attribs |= flags & QScriptValue::UserRange;
+        return true;
+    }
+    return QScriptObjectDelegate::getPropertyAttributes(object, exec, propertyName, attribs);
+}
+
+void DeclarativeObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecState *exec,
+                                                    JSC::PropertyNameArray &propertyNames,
+                                                    bool includeNonEnumerable)
+{
+    QStringList properties = m_class->propertyNames(m_object);
+    for (int ii = 0; ii < properties.count(); ++ii) {
+        const QString &name = properties.at(ii);
+        propertyNames.add(JSC::Identifier(exec, name));
+    }
+
+    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, includeNonEnumerable);
+}
+
+JSC::CallType DeclarativeObjectDelegate::getCallData(QScriptObject *object, JSC::CallData &callData)
+{
+    return QScriptObjectDelegate::getCallData(object, callData);
+}
+
+JSC::ConstructType DeclarativeObjectDelegate::getConstructData(QScriptObject* object, JSC::ConstructData &constructData)
+{
+    return QScriptObjectDelegate::getConstructData(object, constructData);
+}
+
+bool DeclarativeObjectDelegate::hasInstance(QScriptObject* object, JSC::ExecState *exec,
+                                            JSC::JSValue value, JSC::JSValue proto)
+{
+    return QScriptObjectDelegate::hasInstance(object, exec, value, proto);
+}
+
+} // namespace QScript
+
+QT_END_NAMESPACE
diff --git a/src/script/bridge/qscriptdeclarativeobject_p.h b/src/script/bridge/qscriptdeclarativeobject_p.h
new file mode 100644
index 0000000..73e5527
--- /dev/null
+++ b/src/script/bridge/qscriptdeclarativeobject_p.h
@@ -0,0 +1,125 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSCRIPTDECLARATIVEOBJECT_P_H
+#define QSCRIPTDECLARATIVEOBJECT_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qobjectdefs.h>
+
+#include "config.h"
+#include "qscriptobject_p.h"
+#include "qscriptdeclarativeclass_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QScriptClass;
+
+class QScriptDeclarativeClassPrivate
+{
+public:
+    QScriptDeclarativeClassPrivate() : engine(0), q_ptr(0), context(0) {}
+
+    QScriptEngine *engine;
+    QScriptDeclarativeClass *q_ptr;
+    QScriptContext *context;
+
+    static QScriptDeclarativeClassPrivate *get(QScriptDeclarativeClass *c) {
+        return c->d_ptr.data();
+    }
+};
+
+namespace QScript
+{
+
+class DeclarativeObjectDelegate : public QScriptObjectDelegate
+{
+public:
+    DeclarativeObjectDelegate(QScriptDeclarativeClass *c, QScriptDeclarativeClass::Object *o);
+    ~DeclarativeObjectDelegate();
+
+    virtual Type type() const;
+
+    QScriptDeclarativeClass *scriptClass() const { return m_class; }
+    QScriptDeclarativeClass::Object *object() const { return m_object; }
+
+    virtual bool getOwnPropertySlot(QScriptObject*, JSC::ExecState*,
+                                    const JSC::Identifier& propertyName,
+                                    JSC::PropertySlot&);
+    virtual void put(QScriptObject*, JSC::ExecState* exec,
+                     const JSC::Identifier& propertyName,
+                     JSC::JSValue, JSC::PutPropertySlot&);
+    virtual bool deleteProperty(QScriptObject*, JSC::ExecState*,
+                                const JSC::Identifier& propertyName,
+                                bool checkDontDelete = true);
+    virtual bool getPropertyAttributes(const QScriptObject*, JSC::ExecState*,
+                                       const JSC::Identifier&,
+                                       unsigned&) const;
+    virtual void getOwnPropertyNames(QScriptObject*, JSC::ExecState*,
+                                     JSC::PropertyNameArray&, 
+                                     bool includeNonEnumerable = false);
+
+    virtual JSC::CallType getCallData(QScriptObject*, JSC::CallData&);
+    virtual JSC::ConstructType getConstructData(QScriptObject*, JSC::ConstructData&);
+
+    virtual bool hasInstance(QScriptObject*, JSC::ExecState*,
+                             JSC::JSValue value, JSC::JSValue proto);
+
+private:
+    QScriptDeclarativeClass *m_class;
+    QScriptDeclarativeClass::Object *m_object;
+};
+
+} // namespace QScript
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/script/bridge/qscriptobject_p.h b/src/script/bridge/qscriptobject_p.h
index 9dd9d88..0992eec 100644
--- a/src/script/bridge/qscriptobject_p.h
+++ b/src/script/bridge/qscriptobject_p.h
@@ -127,7 +127,8 @@ public:
     enum Type {
         QtObject,
         Variant,
-        ClassObject
+        ClassObject,
+        DeclarativeClassObject
     };
 
     QScriptObjectDelegate();