QmlDesigner.model: Allow sharing of meta info between models

This is necessary to copy and paste comopnents between different
models.

src/plugins/qmldesigner/core/include/model.h

@@ -86,6 +86,7 @@ public:
 
     const MetaInfo metaInfo() const;
     MetaInfo metaInfo();
+    void setMetaInfo(const MetaInfo &metaInfo);
 
     void attachView(AbstractView *view);
     void detachView(AbstractView *view, ViewNotification emitDetachNotify = NotifyView);

src/plugins/qmldesigner/core/model/model.cpp

@@ -251,6 +251,11 @@ MetaInfo ModelPrivate::metaInfo() const
     return m_metaInfo;
 }
 
+void ModelPrivate::setMetaInfo(const MetaInfo &metaInfo)
+{
+    m_metaInfo = metaInfo;
+}
+
 void ModelPrivate::changeNodeId(const InternalNode::Pointer& internalNodePointer, const QString &id)
 {
     const QString oldId = internalNodePointer->id();
@@ -872,6 +877,14 @@ const MetaInfo Model::metaInfo() const
     return m_d->metaInfo();
 }
 
+/*!
+  \brief Sets a specific Metainfo on this Model
+  */
+void Model::setMetaInfo(const MetaInfo &metaInfo)
+{
+    m_d->setMetaInfo(metaInfo);
+}
+
 /*!
   \brief Returns list of Qml types available within the model.
   */

src/plugins/qmldesigner/core/model/model_p.h

@@ -98,6 +98,7 @@ public:
     InternalNodePointer findNode(const QString &id) const;
 
     MetaInfo metaInfo() const;
+    void setMetaInfo(const MetaInfo &metaInfo);
 
     void attachView(AbstractView *view);
     void detachView(AbstractView *view, bool notifyView);