// The logic is similar to UpdateCloneReferences.
// the difference is in this function, we need to set reference by Property.
void UpdateCloneReferenceByModelItem (FlowNode currentFlowElement,
Dictionary<FlowNode, ModelItem> modelItems, Dictionary<FlowNode, FlowNode> clonedFlowElements)
{
if (typeof(FlowStep).IsAssignableFrom(currentFlowElement.GetType()))
{
FlowStep currentFlowStep = (FlowStep)currentFlowElement;
FlowStep clonedFlowStep = (FlowStep)clonedFlowElements[currentFlowElement];
ModelItem modelItem = modelItems[clonedFlowStep];
FlowNode nextFlowElement = currentFlowStep.Next;
if (nextFlowElement != null && clonedFlowElements.ContainsKey(nextFlowElement))
{
modelItem.Properties["Next"].SetValue(clonedFlowElements[nextFlowElement]);
}
else
{
modelItem.Properties["Next"].SetValue(null);
}
}
else if (typeof(FlowDecision).IsAssignableFrom(currentFlowElement.GetType()))
{
if (!modelItems.ContainsKey(currentFlowElement))
{
Fx.Assert("Should not happen.");
}
FlowDecision currentFlowDecision = (FlowDecision)currentFlowElement;
FlowDecision clonedFlowDecision = (FlowDecision)clonedFlowElements[currentFlowElement];
Fx.Assert(currentFlowDecision == clonedFlowDecision, "should not happen");
ModelItem modelItem = modelItems[currentFlowElement];
Fx.Assert(modelItem != null, "should not happen");
FlowNode trueElement = currentFlowDecision.True;
FlowNode falseElement = currentFlowDecision.False;
if (trueElement != null && clonedFlowElements.ContainsKey(trueElement))
{
modelItem.Properties["True"].SetValue(clonedFlowElements[trueElement]);
}
else
{
modelItem.Properties["True"].SetValue(null);
}
if (falseElement != null && clonedFlowElements.ContainsKey(falseElement))
{
modelItem.Properties["False"].SetValue(clonedFlowElements[falseElement]);
}
else
{
modelItem.Properties["False"].SetValue(null);
}
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(currentFlowElement.GetType()))
{
GenericFlowSwitchHelper.ReferenceCopy(currentFlowElement.GetType().GetGenericArguments()[0],
currentFlowElement,
modelItems,
clonedFlowElements);
}
else
{
Debug.Fail("Unknown FlowNode");
}
}
//This does a shallow copy of all the public properties with getter and setter.
//It also replicates Xaml Attached properties.
FlowNode CloneFlowElement(FlowNode flowElement, Predicate<AttachableMemberIdentifier> allowAttachableProperty = null)
{
Type flowElementType = flowElement.GetType();
FlowNode clonedObject = (FlowNode)Activator.CreateInstance(flowElementType);
foreach (PropertyInfo propertyInfo in flowElementType.GetProperties())
{
if (propertyInfo.GetGetMethod() != null && propertyInfo.GetSetMethod() != null)
{
propertyInfo.SetValue(clonedObject, propertyInfo.GetValue(flowElement, null), null);
}
}
//Replicate any Xaml Attached Property.
KeyValuePair<AttachableMemberIdentifier, object>[] attachedProperties = new KeyValuePair<AttachableMemberIdentifier, object>[AttachablePropertyServices.GetAttachedPropertyCount(flowElement)];
AttachablePropertyServices.CopyPropertiesTo(flowElement, attachedProperties, 0);
foreach (KeyValuePair<AttachableMemberIdentifier, object> attachedProperty in attachedProperties)
{
if (allowAttachableProperty != null && !allowAttachableProperty(attachedProperty.Key))
{
continue;
}
AttachablePropertyServices.SetProperty(clonedObject, attachedProperty.Key, attachedProperty.Value);
}
return clonedObject;
}
//This method updates the clone of currentFlowElement to reference cloned FlowElements.
void UpdateCloneReferences(FlowNode currentFlowElement, Dictionary<FlowNode, FlowNode> clonedFlowElements)
{
if (typeof(FlowStep).IsAssignableFrom(currentFlowElement.GetType()))
{
FlowStep currentFlowStep = (FlowStep)currentFlowElement;
FlowStep clonedFlowStep = (FlowStep)clonedFlowElements[currentFlowElement];
FlowNode nextFlowElement = currentFlowStep.Next;
if (nextFlowElement != null && clonedFlowElements.ContainsKey(nextFlowElement))
{
clonedFlowStep.Next = clonedFlowElements[nextFlowElement];
}
else
{
clonedFlowStep.Next = null;
}
}
else if (typeof(FlowDecision).IsAssignableFrom(currentFlowElement.GetType()))
{
FlowDecision currentFlowDecision = (FlowDecision)currentFlowElement;
FlowDecision clonedFlowDecision = (FlowDecision)clonedFlowElements[currentFlowElement];
FlowNode trueElement = currentFlowDecision.True;
FlowNode falseElement = currentFlowDecision.False;
if (trueElement != null && clonedFlowElements.ContainsKey(trueElement))
{
clonedFlowDecision.True = clonedFlowElements[trueElement];
}
else
{
clonedFlowDecision.True = null;
}
if (falseElement != null && clonedFlowElements.ContainsKey(falseElement))
{
clonedFlowDecision.False = clonedFlowElements[falseElement];
}
else
{
clonedFlowDecision.False = null;
}
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(currentFlowElement.GetType()))
{
GenericFlowSwitchHelper.Copy(currentFlowElement.GetType().GetGenericArguments()[0], currentFlowElement, clonedFlowElements);
}
else
{
Debug.Fail("Unknown FlowNode");
}
}