public static ElementLocator Parse(string str)
{
int ichColon = str.IndexOf(':');
if (ichColon < 0)
{
string message = string.Format(Resources.ElementLocator_Parse__0__is_not_a_valid_element_locator_, str);
throw new FormatException(message);
}
var type = str.Substring(0, ichColon);
ElementLocator result = null;
var stringReader = new StringReader(str);
stringReader.Read(new char[ichColon + 1], 0, ichColon + 1);
foreach (var elementLocator in ParseParts(stringReader))
{
result = elementLocator.ChangeParent(result);
}
if (result == null)
{
string message = string.Format(Resources.ElementLocator_Parse__0__is_not_a_valid_element_locator_, str);
throw new FormatException(message);
}
result = result.ChangeType(type);
return(result);
}
/// <summary>
/// Returns an ElementLocator with the new parent.
/// The parent's Type is changed to null, since only the child ElementLocator has a type. The type of its parent
/// can be inferred from the type of the child.
/// </summary>
public ElementLocator ChangeParent(ElementLocator parent)
{
if (ReferenceEquals(Parent, parent))
{
return(this);
}
if (parent != null && parent.Type != null)
{
parent = parent.ChangeType(null);
}
return(ChangeProp(ImClone(this), im => im.Parent = parent));
}