/// <summary>
/// Adds this tracker to the list of active containers.
/// </summary>
/// <param name="root">The root of the list.</param>
internal void StartTracking(ref ContainerTracking <T> root)
{
// Add the node to the root
if (root != null)
{
root._previous = this;
}
_next = root;
root = this;
}
/// <summary>
/// Checks that this tracker is present in the list starting with root. It's a linear walk through the list, so should be used
/// mostly for debugging
/// </summary>
private bool IsInList(ContainerTracking <T> root)
{
ContainerTracking <T> node = root;
while (node != null)
{
if (node == this)
{
return(true);
}
node = node._next;
}
return(false);
}
/// <summary>
/// Removes this tracker from the list of active containers.
/// </summary>
/// <param name="root">The root of the list.</param>
internal void StopTracking(ref ContainerTracking <T> root)
{
// Unhook the node from the list
if (_previous != null)
{
_previous._next = _next;
}
if (_next != null)
{
_next._previous = _previous;
}
// Update the root reference
if (root == this)
{
root = _next;
}
// Clear the node's references
_previous = null;
_next = null;
}
internal void Debug_AssertNotInList(ContainerTracking <T> root)
{
#if DEBUG
Debug.Assert(!IsInList(root), "This container shouldn't be in our tracking list");
#endif
}
internal void Debug_AssertIsInList(ContainerTracking <T> root)
{
#if DEBUG
Debug.Assert(IsInList(root), "This container should be in the tracking list.");
#endif
}
/// <summary>
/// Instantiates a new instance of this class.
/// </summary>
public DataGridRow()
{
_tracker = new ContainerTracking <DataGridRow>(this);
}
/// <summary>
/// Instantiates a new instance of this class.
/// </summary>
public DataGridCell()
{
_tracker = new ContainerTracking <DataGridCell>(this);
}