public NodeNameCommand(NodeNameChange change)
: base(change)
{
}
private void OnBeforeChange(object sender, XObjectChangeEventArgs e)
{
var node = sender as XObject;
// We do not allow editing DTDs through XmlModel
if (node is XDocumentType)
{
var msg = String.Format(CultureInfo.CurrentCulture, Resources.VanillaProvider_DtdNodesReadOnly);
throw new NotSupportedException(msg);
}
var action = e.ObjectChange;
currentChange = null;
XElement element = null;
XAttribute attribute = null;
XText text = null;
XProcessingInstruction pi = null;
XComment comment = null;
switch (action)
{
case XObjectChange.Add:
var addChange = new AddNodeChangeInternal(node, action);
currentChange = addChange;
break;
case XObjectChange.Remove:
var removeChange = new RemoveNodeChange(node, action);
removeChange.Parent = node.Parent;
if (removeChange.Parent == null)
{
removeChange.Parent = node.Document;
}
var attrib = (node as XAttribute);
if (attrib != null)
{
removeChange.NextNode = attrib.NextAttribute;
}
else
{
removeChange.NextNode = (node as XNode).NextNode;
}
currentChange = removeChange;
break;
case XObjectChange.Name:
var nameChange = new NodeNameChange(node, action);
if ((element = node as XElement) != null)
{
nameChange.OldName = element.Name;
}
else if ((pi = node as XProcessingInstruction) != null)
{
nameChange.OldName = XName.Get(pi.Target);
}
else
{
Debug.Assert(false, "The name of something changed that we're not handling here!");
throw new NotSupportedException();
}
currentChange = nameChange;
break;
case XObjectChange.Value:
var valueChange = new NodeValueChange(node, action);
if ((element = node as XElement) != null)
{
valueChange.OldValue = element.Value;
}
else if ((attribute = node as XAttribute) != null)
{
valueChange.OldValue = attribute.Value;
}
else if ((text = node as XText) != null)
{
valueChange.OldValue = text.Value;
if (text.Parent != null)
{
valueChange.Parent = text.Parent;
}
else
{
valueChange.Parent = text.Document;
}
}
else if ((comment = node as XComment) != null)
{
valueChange.OldValue = comment.Value;
}
else if ((pi = node as XProcessingInstruction) != null)
{
valueChange.OldValue = pi.Data;
}
else
{
Debug.Assert(false, "The value of something changed that we're not handling here!");
throw new NotSupportedException();
}
currentChange = valueChange;
break;
}
}
internal virtual NodeNameCommand CreateSetNameCommand(
VanillaXmlModelProvider provider, NodeNameChange change)
{
return new NodeNameCommand(change);
}
