diff -r 000000000000 -r 1918ee327afb tools/designer/src/lib/extension/extension.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/designer/src/lib/extension/extension.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** 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 Qt Designer 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 EXTENSION_H
+#define EXTENSION_H
+
+#include <QtCore/QString>
+#include <QtCore/QObject>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+#define Q_TYPEID(IFace) QLatin1String(IFace##_iid)
+
+class QAbstractExtensionFactory
+{
+public:
+    virtual ~QAbstractExtensionFactory() {}
+
+    virtual QObject *extension(QObject *object, const QString &iid) const = 0;
+};
+Q_DECLARE_INTERFACE(QAbstractExtensionFactory, "com.trolltech.Qt.QAbstractExtensionFactory")
+
+class QAbstractExtensionManager
+{
+public:
+    virtual ~QAbstractExtensionManager() {}
+
+    virtual void registerExtensions(QAbstractExtensionFactory *factory, const QString &iid) = 0;
+    virtual void unregisterExtensions(QAbstractExtensionFactory *factory, const QString &iid) = 0;
+
+    virtual QObject *extension(QObject *object, const QString &iid) const = 0;
+};
+Q_DECLARE_INTERFACE(QAbstractExtensionManager, "com.trolltech.Qt.QAbstractExtensionManager")
+
+#if defined(Q_CC_MSVC) && (_MSC_VER < 1300)
+
+template <class T>
+inline T qt_extension_helper(QAbstractExtensionManager *, QObject *, T)
+{ return 0; }
+
+template <class T>
+inline T qt_extension(QAbstractExtensionManager* manager, QObject *object)
+{ return qt_extension_helper(manager, object, T(0)); }
+
+#define Q_DECLARE_EXTENSION_INTERFACE(IFace, IId) \
+const char * const IFace##_iid = IId; \
+Q_DECLARE_INTERFACE(IFace, IId) \
+template <> inline IFace *qt_extension_helper<IFace *>(QAbstractExtensionManager *manager, QObject *object, IFace *) \
+{ QObject *extension = manager->extension(object, Q_TYPEID(IFace)); return (IFace *)(extension ? extension->qt_metacast(IFace##_iid) : 0); }
+
+#else
+
+template <class T>
+inline T qt_extension(QAbstractExtensionManager* manager, QObject *object)
+{ return 0; }
+
+#define Q_DECLARE_EXTENSION_INTERFACE(IFace, IId) \
+const char * const IFace##_iid = IId; \
+Q_DECLARE_INTERFACE(IFace, IId) \
+template <> inline IFace *qt_extension<IFace *>(QAbstractExtensionManager *manager, QObject *object) \
+{ QObject *extension = manager->extension(object, Q_TYPEID(IFace)); return extension ? static_cast<IFace *>(extension->qt_metacast(IFace##_iid)) : static_cast<IFace *>(0); }
+
+#endif
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // EXTENSION_H