public override ObjectWrapper ReadObject(XmlElement elem, ObjectWrapper root)
{
ObjectWrapper ww = base.ReadObject(elem, root);
if (ww is Widget)
{
undoManager.RegisterObject((Widget)ww, elem);
}
return(ww);
}
public override XmlElement WriteObject(ObjectWrapper wrapper)
{
Wrapper.Widget ww = wrapper as Wrapper.Widget;
// If the object is already registered, skip it (just create a dummy object)
if (allowMarkers && ww != null && undoManager.IsRegistered(ww) && !ww.RequiresUndoStatusUpdate)
{
XmlElement marker = XmlDocument.CreateElement("widget");
marker.SetAttribute("unchanged_marker", "yes");
return(marker);
}
// Don't allow markers in indirect children, since those are not checked
// when creating the diff
bool oldAllow = allowMarkers;
allowMarkers = false;
XmlElement elem = base.WriteObject(wrapper);
allowMarkers = oldAllow;
if (ww != null)
{
ww.RequiresUndoStatusUpdate = false;
}
// Register the object, so it is correctly bound to this xml element
if (undoManager.IsRegistered(wrapper))
{
undoManager.UnregisterObject(wrapper);
}
undoManager.RegisterObject(wrapper, elem);
return(elem);
}
