/// <summary>
/// Enqueues any elements within the specified tree that have invalid measure, arrange, or styles, but
/// were previously removed from the queues as a result of being orphaned by a destroyed window.
/// </summary>
/// <param name="root">The root of the tree to restore.</param>
internal void RestoreToQueues(DependencyObject root)
{
Contract.Require(root, nameof(root));
if (root is UIElement uiElement)
{
if (!uiElement.IsMeasureValid)
{
MeasureQueue.Enqueue(uiElement);
}
if (!uiElement.IsArrangeValid)
{
ArrangeQueue.Enqueue(uiElement);
}
if (!uiElement.IsStyleValid)
{
StyleQueue.Enqueue(uiElement);
}
}
VisualTreeHelper.ForEachChild(root, this, (child, state) =>
{
((PresentationFoundation)state).RestoreToQueues(child);
});
}
