internal ExplorerEFElement GetExplorerEFElementForEFObject(EditingContext editingContext, EFObject targetEFObject)
{
if (targetEFObject == null)
{
return(null);
}
//
// Find the EFObject we want to navigate to for the given EFObject
//
var targetEFElement = GetNavigationTarget(targetEFObject);
//
// get all EFElement nodes on the path from our target node to the root.
//
var elementStack = new LinkedList <EFElement>();
var e = targetEFElement;
while (e != null)
{
elementStack.AddLast(e);
e = e.Parent as EFElement;
}
//
// unwind the stack, making sure that each element's explorer model node exists.
//
var explorerElement = ViewModel.RootNode;
while (elementStack.Count > 0)
{
var e2 = elementStack.Last.Value;
elementStack.RemoveLast();
var viewModelType = ModelToExplorerModelXRef.GetViewModelTypeForEFElement(editingContext, e2);
// if viewModelType is null then that kind of EFElement is not displayed
// in the Explorer (e.g. S-side StorageEntityContainer and children)
if (null != viewModelType)
{
var nextElement = ModelToExplorerModelXRef.GetNewOrExisting(editingContext, e2, explorerElement, viewModelType);
// There are "dummy-nodes" in the view-model that don't correspond to a node in the model.
// We need to skip over them here.
if (nextElement != null &&
elementStack.Count > 0)
{
nextElement = nextElement.GetParentNodeForElement(elementStack.Last.Value);
Debug.Assert(nextElement != null, "GetParentNodeForElement returned null");
}
if (nextElement != null)
{
explorerElement = nextElement;
}
}
}
Debug.Assert(explorerElement != null, "no explorer element found for targetEFObject");
if (explorerElement != null)
{
//
// now make sure that our target node in the explorer tree is visible.
//
explorerElement.ExpandTreeViewToMe();
}
return(explorerElement);
}
