ModelEditor: Implement shared clipboard between all open model-editors

Change-Id: Id2eb6f78f8aa1a698a49d35db6cfceab14a38e0b
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

2 files changed, 29 insertions, 10 deletions

diff --git a/src/libs/modelinglib/qmt/model_controller/modelcontroller.cpp b/src/libs/modelinglib/qmt/model_controller/modelcontroller.cpp
index fc3072da27..ff74d61ff3 100644
--- a/src/libs/modelinglib/qmt/model_controller/modelcontroller.cpp
+++ b/src/libs/modelinglib/qmt/model_controller/modelcontroller.cpp
@@ -604,16 +604,24 @@ void ModelController::setUndoController(UndoController *undoController)
     m_undoController = undoController;
 }
 
+Uid ModelController::ownerKey(const Uid &key) const
+{
+    MElement *element = findElement(key);
+    if (!element)
+        return Uid::invalidUid();
+    return ownerKey(element);
+}
+
 Uid ModelController::ownerKey(const MElement *element) const
 {
     QMT_ASSERT(element, return Uid());
     MObject *owner = element->owner();
     if (!owner)
-        return Uid();
+        return Uid::invalidUid();
     return owner->uid();
 }
 
-MElement *ModelController::findElement(const Uid &key)
+MElement *ModelController::findElement(const Uid &key) const
 {
     if (MObject *object = findObject(key))
         return object;
@@ -915,17 +923,20 @@ MContainer ModelController::copyElements(const MSelection &modelSelection)
     return copiedElements;
 }
 
-void ModelController::pasteElements(MObject *owner, const MContainer &modelContainer)
+void ModelController::pasteElements(MObject *owner, const MReferences &modelContainer, PasteOption option)
 {
     // clone all elements and renew their keys
     QHash<Uid, Uid> renewedKeys;
     QList<MElement *> clonedElements;
     foreach (MElement *element, modelContainer.elements()) {
-        MCloneDeepVisitor visitor;
-        element->accept(&visitor);
-        MElement *clonedElement = visitor.cloned();
-        renewElementKey(clonedElement, &renewedKeys);
-        clonedElements.append(clonedElement);
+        if (option == PasteAlwaysWithNewKeys || option == PasteAlwaysAndKeepKeys || !findElement(element->uid())) {
+            MCloneDeepVisitor visitor;
+            element->accept(&visitor);
+            MElement *clonedElement = visitor.cloned();
+            if (option == PasteAlwaysWithNewKeys || (option == PasteAlwaysAndKeepKeys && findElement(element->uid())))
+                renewElementKey(clonedElement, &renewedKeys);
+            clonedElements.append(clonedElement);
+        }
     }
     // fix all keys referencing between pasting elements
     foreach (MElement *clonedElement, clonedElements)
diff --git a/src/libs/modelinglib/qmt/model_controller/modelcontroller.h b/src/libs/modelinglib/qmt/model_controller/modelcontroller.h
index 345d5c0ce9..5b95d2a575 100644
--- a/src/libs/modelinglib/qmt/model_controller/modelcontroller.h
+++ b/src/libs/modelinglib/qmt/model_controller/modelcontroller.h
@@ -61,6 +61,13 @@ class QMT_EXPORT ModelController : public QObject
     class MoveRelationCommand;
 
 public:
+
+    enum PasteOption {
+        PasteAlwaysWithNewKeys,
+        PasteAlwaysAndKeepKeys,
+        PasteOnlyNewElements
+    };
+
     explicit ModelController(QObject *parent = nullptr);
     ~ModelController() override;
 
@@ -93,8 +100,9 @@ public:
     UndoController *undoController() const { return m_undoController; }
     void setUndoController(UndoController *undoController);
 
+    Uid ownerKey(const Uid &key) const;
     Uid ownerKey(const MElement *element) const;
-    MElement *findElement(const Uid &key);
+    MElement *findElement(const Uid &key) const;
     template<class T>
     T *findElement(const Uid &key) { return dynamic_cast<T *>(findElement(key)); }
 
@@ -124,7 +132,7 @@ public:
 
     MContainer cutElements(const MSelection &modelSelection);
     MContainer copyElements(const MSelection &modelSelection);
-    void pasteElements(MObject *owner, const MContainer &modelContainer);
+    void pasteElements(MObject *owner, const MReferences &modelContainer, PasteOption option);
     void deleteElements(const MSelection &modelSelection);
 
 private: