/// <summary>
/// Creates a new XPathNavigator using the same source but positioned at a new root.
/// </summary>
/// <returns>A new XPathNavigator using the same source and positioned at a new root.</returns>
/// <remarks>The new root can be above this navigator's root.</remarks>
public XPathNavigator CloneWithNewRoot(int id, int maxDepth = int.MaxValue)
{
DebugEnter("CloneWithNewRoot");
State state = null;
if (id <= 0)
{
state = new State(_source.Root, null, null, 0, StatePosition.Root);
}
else
{
var content = SourceGet(id);
if (content != null)
{
state = new State(content, null, null, 0, StatePosition.Root);
}
}
NavigableNavigator clone = null;
if (state != null)
{
clone = new NavigableNavigator(this, state, maxDepth);
DebugCreate(clone);
DebugReturn("[XPathNavigator]");
}
else
{
DebugReturn("[null]");
}
return(clone);
}
/// <summary>
/// Creates a new XPathNavigator positioned at the same node as this XPathNavigator.
/// </summary>
/// <returns>A new XPathNavigator positioned at the same node as this XPathNavigator.</returns>
public override XPathNavigator Clone()
{
DebugEnter("Clone");
var nav = new NavigableNavigator(this);
DebugCreate(nav);
DebugReturn("[XPathNavigator]");
return(nav);
}
///// <summary>
///// Initializes a new instance of the <see cref="NavigableNavigator"/> class with a content source, a name table and a state.
///// </summary>
///// <param name="source">The content source.</param>
///// <param name="nameTable">The name table.</param>
///// <param name="state">The state.</param>
///// <param name="maxDepth">The maximum depth.</param>
///// <remarks>Privately used for cloning a navigator.</remarks>
//private NavigableNavigator(INavigableSource source, XmlNameTable nameTable, State state, int maxDepth)
// : this(source, rootId: 0, maxDepth: maxDepth)
//{
// _nameTable = nameTable;
// _state = state;
//}
/// <summary>
/// Initializes a new instance of the <see cref="NavigableNavigator"/> class as a clone.
/// </summary>
/// <param name="orig">The cloned navigator.</param>
/// <param name="state">The clone state.</param>
/// <param name="maxDepth">The clone maximum depth.</param>
/// <remarks>Privately used for cloning a navigator.</remarks>
private NavigableNavigator(NavigableNavigator orig, State state = null, int maxDepth = -1)
: this(orig._source, rootId : 0, maxDepth : orig._maxDepth)
{
_nameTable = orig._nameTable;
_state = state ?? orig._state.Clone();
if (state != null && maxDepth < 0)
{
throw new ArgumentException("Both state and maxDepth are required.");
}
_maxDepth = maxDepth < 0 ? orig._maxDepth : maxDepth;
_contents = orig._contents;
}
void DebugCreate(NavigableNavigator nav)
{
#if DEBUGNAVIGATOR
Debug("Create: [NavigableNavigator::{0}]", nav._uid);
#endif
}