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);
}
public void Dispose()
{
if (Count == 0)
{
return;
}
if (Count == 1)
{
// The change events fired here may generate changes in other
// objects. Those changes will also be included in the transaction.
// So, the ChangeEventPending array may grow while calling NotifyChanged,
// and that's ok.
for (int n = 0; n < ChangeEventPending.Count; n++)
{
((ObjectWrapper)ChangeEventPending[n]).FireObjectChangedEvent();
}
// Remove from the list the widgets that have been disposed. It means that
// they have been deleted. That change will be recorded by their parents.
// Remove as well wrappers that are not registered, since there won't be
// status information for them.
for (int n = 0; n < ChangeEventPending.Count; n++)
{
ObjectWrapper w = (ObjectWrapper)ChangeEventPending[n];
if (w.IsDisposed || !undoManager.IsRegistered(w))
{
ChangeEventPending.RemoveAt(n);
n--;
}
}
ObjectWrapper[] obs = (ObjectWrapper[])ChangeEventPending.ToArray(typeof(ObjectWrapper));
ChangeEventPending.Clear();
Count = 0;
if (!delayed)
{
undoManager.NotifyUndoCheckpoint(obs);
}
delayed = false;
}
else
{
Count--;
}
}