internal XPathContext Map(XmlNode n)
{
XPathContext ctx = (XPathContext)xpathContext.Clone();
ctx.NavigateToChild(childIndex[n]);
return(ctx);
}
public void ShouldCreateCopyOnClone()
{
List <Element> l = new List <Element>();
l.Add(new Element("foo"));
l.Add(new Element("foo"));
l.Add(new Element("bar"));
XPathContext ctx = new XPathContext();
ctx.SetChildren(l);
ctx.NavigateToChild(1);
Assert.AreEqual("/foo[2]", ctx.XPath);
Assert.AreEqual("/", ctx.ParentXPath);
XPathContext clone = (XPathContext)ctx.Clone();
Assert.AreEqual("/foo[2]", clone.XPath);
Assert.AreEqual("/", clone.ParentXPath);
Assert.AreNotSame(ctx, clone);
clone.NavigateToParent();
clone.NavigateToChild(2);
Assert.AreEqual("/bar[1]", clone.XPath);
Assert.AreEqual("/", clone.ParentXPath);
Assert.AreEqual("/foo[2]", ctx.XPath);
Assert.AreEqual("/", ctx.ParentXPath);
}
/// <summary>
/// Creates an instance of ChildNodeXPathContextProvider.
/// </summary>
/// <param name="parentContext">parentContext context of the
/// parent of all Nodes ever expected to be passed in as
/// arguments to Map. This XPathContext must be "positioned
/// at" the parent element and already know about all its
/// children.</param>
/// <param name="children">all child nodes of the parent in
/// the same order they are known to the XPathContext.</param>
internal ChildNodeXPathContextProvider(XPathContext parentContext,
IEnumerable <XmlNode> children)
{
this.xpathContext = (XPathContext)parentContext.Clone();
childIndex = children.Select((n, i) => new { Node = n, Index = i })
.ToDictionary(t => t.Node, t => t.Index);
}
