/// <summary>
/// Inserts the element passed in as a sibling to the element the navigator is currently on.
/// The navigator will move to the inserted element.
/// </summary>
/// <param name="sibling"></param>
/// <returns></returns>
public override bool InsertAfter(ElementDefinition sibling)
{
if (!canInsertSiblingHere()) return false;
var insertPosition = positionAfter();
var newSiblingPath = ParentPath + "." + sibling.GetNameFromPath();
if (insertPosition == Count) // At last position
Elements.Add(sibling);
else
Elements.Insert(insertPosition, sibling);
// Adjust the sibling's path so it's parent is the same as the current node
sibling.Path = newSiblingPath;
// Navigate to newly inserted node
OrdinalPosition = insertPosition;
return true;
}
/// <summary>
/// Inserts the element passed in as a child of the element the navigator is currently on.
/// The navigator will move to the inserted element.
/// </summary>
/// <param name="child"></param>
/// <returns></returns>
/// <remarks>You can only insert a child for an element does not have children yet.</remarks>
public override bool InsertFirstChild(ElementDefinition child)
{
if(Count == 0)
{
// Special case, insert a new root
Elements.Add(child);
child.Path = child.GetNameFromPath();
OrdinalPosition = 0;
return true;
}
else if(HasChildren)
return false; // Cannot insert another child, there's already one.
else
{
var newSiblingPath = Path + "." + child.GetNameFromPath();
if (OrdinalPosition == Count - 1) // At last position
Elements.Add(child);
else
Elements.Insert(OrdinalPosition.Value + 1, child);
// Set the name to be a true child -> this actually creates a child
child.Path = newSiblingPath;
// Navigate to newly inserted child
OrdinalPosition += 1;
return true;
}
}
//----------------------------------
//
// Methods that alter the list of elements
//
//----------------------------------
/// <summary>
/// Inserts the element passed in as a sibling to the element the navigator is currently on.
/// The navigator will move to the inserted element.
/// </summary>
/// <param name="sibling"></param>
/// <returns></returns>
public override bool InsertBefore(ElementDefinition sibling)
{
if (!canInsertSiblingHere()) return false;
var newSiblingPath = ParentPath + "." + sibling.GetNameFromPath();
Elements.Insert(OrdinalPosition.Value, sibling);
// Adjust the sibling's path so it's parent is the same as the current node
sibling.Path = newSiblingPath;
// Note: we're now positioned on the newly inserted element
return true;
}