internal void FireFunctionalChildDetached(FunctionalTreeElement oldChild, FunctionalTreeElement parent)
{
if (FunctionalChildDetachedInternal != null)
FunctionalChildDetachedInternal(oldChild, parent, this);
if (FunctionalChildDetached != null)
FunctionalChildDetached(oldChild.Element, parent.Element, this);
}
internal void FireFunctionalChildAttached(FunctionalTreeElement newChild, FunctionalTreeElement parent)
{
if (FunctionalChildAttachedInternal != null && IsChild(newChild.Element))
FunctionalChildAttachedInternal(newChild, parent, this);
if (FunctionalChildAttached != null && IsChild(newChild.Element))
FunctionalChildAttached(newChild.Element, parent.Element, this);
}
private IEnumerable<FunctionalTreeElement> GetAllElements(FunctionalTreeElement element)
{
List<FunctionalTreeElement> elements = new List<FunctionalTreeElement>();
elements.Add(element);
foreach (FunctionalTreeElement child in element.Children)
elements.AddRange(GetAllElements(child));
return elements;
}
internal FunctionalTreeElement(IFunctionalTreeElement element, FunctionalTreeElement parent)
{
if (element == null)
throw new ArgumentNullException("element", "element is null.");
Element = element;
Parent = parent;
_children = new List<FunctionalTreeElement>();
Children = new ReadOnlyCollection<FunctionalTreeElement>(_children);
}
private void FunctionalElementDetachedFromTree(FunctionalTreeElement element, FunctionalTreeElement parent, FunctionalTree functionalTree)
{
foreach (FunctionalProperty property in FunctionalPropertyValuesInternal.Keys)
{
if (property.DefaultMetadata == null || !property.DefaultMetadata.Inherits || property.DefaultMetadata.PropertyChangedCallback == null)
continue;
if (HasValue(property, element.Element))
continue;
FunctionalTreeElement curParent = parent;
while (curParent != null)
{
if (HasValue(property, curParent.Element))
{
object oldValue = GetValue(property, curParent.Element);
object newValue = property.DefaultMetadata.DefaultValue;
property.DefaultMetadata.PropertyChangedCallback(element.Element,
new FunctionalPropertyChangedEventArgs(property, oldValue, newValue));
if (property.DefaultMetadata.Inherits)
NotifyChildrenAboutInheritedValue(FunctionalTreeHelper.GetFunctionalChildren(element.Element), property, oldValue, newValue);
break;
}
curParent = curParent.Parent;
}
}
}
internal FunctionalTree(FunctionalTreeElement root)
{
RootElement = root;
}
internal FunctionalTree(IFunctionalTreeElement root)
{
RootElement = new FunctionalTreeElement(root, null);
}
private void Tree_FunctionalChildAttached(FunctionalTreeElement child, FunctionalTreeElement parent, FunctionalTree functionalTree)
{
//remove all other trees with the element or any child in it
IEnumerable<FunctionalTreeElement> childSubElements = GetAllElements(child);
IEnumerable<FunctionalTree> treesToRemove = FunctionalTreeList.Where(tree => childSubElements.Any(subElement => tree.IsChild(subElement.Element)));
//Debug.Assert((treesToRemove.Count() - 1) <= 1, "There shouldn't be more than one tree to remove.");
foreach (FunctionalTree tree in treesToRemove.ToList())
{
if (tree == functionalTree)
continue;
tree.FunctionalChildAttachedInternal -= Tree_FunctionalChildAttached;
tree.FunctionalChildDetachedInternal -= Tree_FunctionalChildDetached;
FunctionalTreeList.Remove(tree);
}
if (FunctionalElementAttachedToTree != null)
FunctionalElementAttachedToTree(child, parent, functionalTree);
}
private void Tree_FunctionalChildDetached(FunctionalTreeElement child, FunctionalTreeElement parent, FunctionalTree functionalTree)
{
//Make sure there are no other trees with child in it
int removedTreeCount = RemoveTreesWithElement(child.Element);
//TODO fix and remove unused trees effectively
//Debug.Assert(removedTreeCount == 0, "There shouldn't have been any trees left with child in it.");
if (child.HasData)
{
//save child in new functional tree to save the data
FunctionalTree tree = new FunctionalTree(child);
tree.FunctionalChildAttachedInternal += Tree_FunctionalChildAttached;
tree.FunctionalChildDetachedInternal += Tree_FunctionalChildDetached;
FunctionalTreeList.Add(tree);
}
if (FunctionalElementDetachedFromTree != null)
FunctionalElementDetachedFromTree(child, parent, functionalTree);
}