private FoldableObjectToken getTokenOf(IFoldableObject obj) {
foreach (var info in _activeObjects) {
if (info.Target == obj) return info;
}
foreach (var info in _packedObjects) {
if (info.Target == obj) return info;
}
return null;
}
public FoldableLockObject(IFoldableObject target) {
this.Target = target;
}
public void Unregister(IFoldableObject obj) {
if (!Contains(obj)) return;
obj.StateChanged -= Obj_StateChanged;
pop(getTokenOf(obj));
}
public void Register (IFoldableObject obj) {
if (Contains(obj)) return;
push( new FoldableObjectToken(obj));
obj.StateChanged += Obj_StateChanged;
}
public bool Contains(IFoldableObject obj) {
return getTokenOf(obj) != null;
}
public FoldableObjectToken(IFoldableObject obj) {
this.Target = obj;
}
private void Obj_StateChanged(IFoldableObject obj, EventArgs e) {
if (obj.CurrentState == FoldableObjectState.NotRegistered) {
throw new InvalidOperationException();
}
var info = getTokenOf(obj);
pop(info);
push(info);
}