Add public API for retrieving the extension object

Change-Id: I28bc1c177cb78d85d844c7a5cd5b6710db8fd65d
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/qml/qml/qqml.cpp b/src/qml/qml/qqml.cpp
index d8d366a716..8859dea711 100644
--- a/src/qml/qml/qqml.cpp
+++ b/src/qml/qml/qqml.cpp
@@ -149,6 +149,25 @@ QObject *qmlAttachedPropertiesObject(QObject *object, QQmlAttachedPropertiesFunc
     return resolveAttachedProperties(func, data, object, create);
 }
 
+QObject *qmlExtendedObject(QObject *object)
+{
+    if (!object)
+        return nullptr;
+
+    void *result = nullptr;
+    QObjectPrivate *d = QObjectPrivate::get(object);
+    if (!d->metaObject)
+        return nullptr;
+
+    const int id = d->metaObject->metaCall(
+                object, QMetaObject::CustomCall,
+                QQmlProxyMetaObject::ExtensionObjectId, &result);
+    if (id != QQmlProxyMetaObject::ExtensionObjectId)
+        return nullptr;
+
+    return static_cast<QObject *>(result);
+}
+
 int qmlRegisterUncreatableMetaObject(const QMetaObject &staticMetaObject,
                                      const char *uri, int versionMajor,
                                      int versionMinor, const char *qmlName,