private void ParsePath(string path, out IPropertyPathNode head, out IPropertyPathNode tail)
{
head = null;
tail = null;
var parser = new PropertyPathParser(path);
PropertyNodeType type;
while ((type = parser.Step(out string typeName, out string propertyName, out string index)) != PropertyNodeType.None)
{
IPropertyPathNode node;
switch (type)
{
case PropertyNodeType.AttachedProperty:
case PropertyNodeType.Property:
node = new StandardPropertyPathNode(typeName, propertyName);
break;
case PropertyNodeType.Indexed:
node = new IndexedPropertyPathNode(index);
break;
default:
throw new InvalidOperationException();
}
if (head == null)
{
head = tail = node;
continue;
}
tail.Next = node;
tail = node;
}
}
internal PropertyPathWalker(string path, bool isDatacontextBound)
{
Path = path;
StandardPropertyPathNode lastNode;
IsDataContextBound = isDatacontextBound;
if (path == null || path == ".")
{
//bindsDirectlyToSource set to true means that the binding is directly made to the source (--> there is no path)
lastNode = new StandardPropertyPathNode(); //what to put in there ?
FirstNode = lastNode;
FinalNode = lastNode;
}
else
{
PropertyNodeType type;
var parser = new PropertyPathParser(path);
string typeName;
string propertyName;
int index;
//IPropertyPathNode node;
while ((type = parser.Step(out typeName, out propertyName, out index)) != PropertyNodeType.None)
{
//we make node advance (when it is not the first step, otherwise it stays at null)
//node = FinalNode;
//var isViewProperty = false;
//boolean isViewProperty = CollectionViewProperties.Any (prop => prop.Name == propertyName);
// static readonly PropertyInfo[] CollectionViewProperties = typeof (ICollectionView).GetProperties ();
switch (type)
{
case PropertyNodeType.AttachedProperty:
case PropertyNodeType.Property:
if (FinalNode == null)
{
FinalNode = new StandardPropertyPathNode(typeName, propertyName);
}
else
{
FinalNode.Next = new StandardPropertyPathNode(typeName, propertyName);
}
break;
case PropertyNodeType.Indexed:
throw new NotImplementedException("Indexed properties are not supported yet.");
//todo: when we will handle the indexed properties, uncomment the following
//node.Next = new IndexedPropertyPathNode(index);
break;
default:
break;
}
if (FirstNode == null)
{
FirstNode = FinalNode;
}
if (FinalNode.Next != null)
{
FinalNode = FinalNode.Next;
}
}
}
this.FinalNode.Listen(this);
}
