QmlDesigner: Allow qml2puppet to mockup C++ types

This allows Qt Quick Designer to register a component that can serve
as a mockup for known C++ components registered in e.g. main.cpp.

In many cases those components are the interface to the C++ backend.
While the C++ components itself are not relevant for the gui designer,
the user has to be able to instantiate gui components that use such C++
components.

We use the CreateSceneCommand to forward a list of C++ types to
qml2puppet.
Those types are then registered so that the imports and object institation
works.

Change-Id: I1543912f233f9a783998f3c6a1b48981b342ee80
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp

@@ -41,6 +41,10 @@
 
 #include <qmlprivategate.h>
 
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+#include <private/qquickdesignersupportmetainfo_p.h>
+#endif
+
 #include <createinstancescommand.h>
 #include <changefileurlcommand.h>
 #include <clearscenecommand.h>
@@ -659,6 +663,25 @@ void NodeInstanceServer::setupDummysForContext(QQmlContext *context)
     }
 }
 
+void NodeInstanceServer::setupMockupTypes(const QVector<MockupTypeContainer> &container)
+{
+    for (const MockupTypeContainer &mockupType :  container) {
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 8, 0))
+        QQuickDesignerSupportMetaInfo::registerMockupObject(mockupType.importUri().toUtf8(),
+                                                            mockupType.majorVersion(),
+                                                            mockupType.minorVersion(),
+                                                            mockupType.typeName());
+#else
+        qmlRegisterType(QUrl("qrc:/qtquickplugin/mockfiles/GenericBackend.qml"),
+                        mockupType.importUri().toUtf8(),
+                        mockupType.majorVersion(),
+                        mockupType.minorVersion(),
+                        mockupType.typeName());
+#endif
+
+    }
+}
+
 
 QList<QQmlContext*> NodeInstanceServer::allSubContextsForObject(QObject *object)
 {

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h

@@ -54,6 +54,7 @@ class ChildrenChangedCommand;
 class ReparentContainer;
 class ComponentCompletedCommand;
 class AddImportContainer;
+class MockupTypeContainer;
 class IdContainer;
 
 namespace Internal {
@@ -188,6 +189,7 @@ protected:
 
     void setupDummysForContext(QQmlContext *context);
 
+    void setupMockupTypes(const QVector<MockupTypeContainer> &container);
     void setupFileUrl(const QUrl &fileUrl);
     void setupImports(const QVector<AddImportContainer> &container);
     void setupDummyData(const QUrl &fileUrl);

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5nodeinstanceserver.cpp

@@ -85,6 +85,8 @@ void Qt5NodeInstanceServer::resetAllItems()
 
 void Qt5NodeInstanceServer::setupScene(const CreateSceneCommand &command)
 {
+
+    setupMockupTypes(command.mockupTypes());
     setupFileUrl(command.fileUrl());
     setupImports(command.imports());
     setupDummyData(command.fileUrl());