public override void Update()
{
Debug.Assert(this.m_State == BaseVisualTreeHierarchyTrackerUpdater.State.TrackingAddOrMove || this.m_State == BaseVisualTreeHierarchyTrackerUpdater.State.Waiting);
bool flag = this.m_State == BaseVisualTreeHierarchyTrackerUpdater.State.TrackingAddOrMove;
if (flag)
{
this.OnHierarchyChange(this.m_CurrentChangeElement, HierarchyChangeType.Move);
this.m_State = BaseVisualTreeHierarchyTrackerUpdater.State.Waiting;
}
this.m_CurrentChangeElement = null;
this.m_CurrentChangeParent = null;
}
private void ProcessRemove(VisualElement ve)
{
this.OnHierarchyChange(this.m_CurrentChangeElement, HierarchyChangeType.Remove);
bool flag = ve.panel != null;
if (flag)
{
this.m_CurrentChangeParent = null;
this.m_CurrentChangeElement = null;
this.m_State = BaseVisualTreeHierarchyTrackerUpdater.State.Waiting;
}
else
{
this.m_CurrentChangeElement = ve;
}
}
private void ProcessAddOrMove(VisualElement ve)
{
Debug.Assert(this.m_CurrentChangeParent != null);
bool flag = this.m_CurrentChangeParent == ve;
if (flag)
{
this.OnHierarchyChange(this.m_CurrentChangeElement, HierarchyChangeType.Add);
this.m_State = BaseVisualTreeHierarchyTrackerUpdater.State.Waiting;
}
else
{
this.OnHierarchyChange(this.m_CurrentChangeElement, HierarchyChangeType.Move);
this.ProcessNewChange(ve);
}
}
private void ProcessNewChange(VisualElement ve)
{
this.m_CurrentChangeElement = ve;
this.m_CurrentChangeParent = ve.parent;
bool flag = this.m_CurrentChangeParent == null && ve.panel != null;
if (flag)
{
this.OnHierarchyChange(this.m_CurrentChangeElement, HierarchyChangeType.Move);
this.m_State = BaseVisualTreeHierarchyTrackerUpdater.State.Waiting;
}
else
{
this.m_State = ((this.m_CurrentChangeParent == null) ? BaseVisualTreeHierarchyTrackerUpdater.State.TrackingRemove : BaseVisualTreeHierarchyTrackerUpdater.State.TrackingAddOrMove);
}
}
