public override bool IsSamePosition(XPathNavigator other)
{
if (other == null)
{
return(false);
}
DataDocumentXPathNavigator navigator = other as DataDocumentXPathNavigator;
return(((navigator != null) && (this._doc == navigator.Document)) && this._curNode.IsSamePosition(navigator.CurNode));
}
private XPathNodePointer(DataDocumentXPathNavigator owner, XmlDataDocument doc, XmlNode node, DataColumn c, bool bOnValue, XmlBoundElement parentOfNS)
{
this._owner = new WeakReference(owner);
this._doc = doc;
this._node = node;
this._column = c;
this._fOnValue = bOnValue;
this._parentOfNS = parentOfNS;
this._doc.AddPointer(this);
this._bNeedFoliate = false;
}
public override XmlNodeOrder ComparePosition(XPathNavigator other)
{
if (other != null)
{
DataDocumentXPathNavigator navigator = other as DataDocumentXPathNavigator;
if ((navigator != null) && (navigator.Document == this._doc))
{
return(this._curNode.ComparePosition(navigator.CurNode));
}
}
return(XmlNodeOrder.Unknown);
}
public override XmlNodeOrder ComparePosition(XPathNavigator other)
{
if (other == null)
{
return(XmlNodeOrder.Unknown); // this is what XPathDocument does.
}
DataDocumentXPathNavigator otherDataDocXPathNav = other as DataDocumentXPathNavigator;
return(otherDataDocXPathNav == null || otherDataDocXPathNav.Document != _doc ?
XmlNodeOrder.Unknown :
_curNode.ComparePosition(otherDataDocXPathNav.CurNode));
}
public override bool IsSamePosition(XPathNavigator other)
{
if (other != null)
{
DataDocumentXPathNavigator otherDataDocXPathNav = other as DataDocumentXPathNavigator;
if (otherDataDocXPathNav != null &&
_doc == otherDataDocXPathNav.Document && _curNode.IsSamePosition(otherDataDocXPathNav.CurNode))
{
return(true);
}
}
return(false);
}
public override bool MoveTo(XPathNavigator other)
{
if (other != null)
{
DataDocumentXPathNavigator otherDataDocXPathNav = other as DataDocumentXPathNavigator;
if (otherDataDocXPathNav != null && _curNode.MoveTo(otherDataDocXPathNav.CurNode))
{
_doc = _curNode.Document;
return(true);
}
}
return(false);
}
public override XmlNodeOrder ComparePosition(XPathNavigator other)
{
if (other == null)
{
throw new NullReferenceException();
}
DataDocumentXPathNavigator otherDataDocXPathNav = other as DataDocumentXPathNavigator;
if (otherDataDocXPathNav == null || otherDataDocXPathNav.Document != this._doc)
{
return(XmlNodeOrder.Unknown);
}
return(this._curNode.ComparePosition(otherDataDocXPathNav.CurNode));
}
public override bool MoveTo(XPathNavigator other)
{
if (other != null)
{
DataDocumentXPathNavigator navigator = other as DataDocumentXPathNavigator;
if (navigator == null)
{
return(false);
}
if (this._curNode.MoveTo(navigator.CurNode))
{
this._doc = this._curNode.Document;
return(true);
}
}
return(false);
}
private DataDocumentXPathNavigator(DataDocumentXPathNavigator other)
{
this._curNode = other._curNode.Clone(this);
this._temp = other._temp.Clone(this);
this._doc = other._doc;
}
internal XPathNodePointer Clone( DataDocumentXPathNavigator owner ){
//Debug.WriteLineIf( XmlTrace.traceXPathNodePointerFunctions.Enabled, "XPathNodePointer:Clone");
RealFoliate();
return new XPathNodePointer( owner, this ) ;
}
private XPathNodePointer( DataDocumentXPathNavigator owner, XmlDataDocument doc, XmlNode node, DataColumn c, bool bOnValue, XmlBoundElement parentOfNS ) {
Debug.Assert( owner != null );
this._owner = new WeakReference( owner );
this._doc = doc;
this._node = node;
this._column = c;
this._fOnValue = bOnValue;
this._parentOfNS = parentOfNS;
// Add this pointer to the document so it will be updated each time region changes it's foliation state.
this._doc.AddPointer( (IXmlDataVirtualNode)this );
_bNeedFoliate = false;
AssertValid();
}
internal XPathNodePointer( DataDocumentXPathNavigator owner, XPathNodePointer pointer )
: this ( owner, pointer._doc, pointer._node, pointer._column, pointer._fOnValue, pointer._parentOfNS ) {
}
//when the constructor is called, the node has to be a valid XPath node at the valid location ( for example, the first
//text/WS/SWS/CData nodes of a series continuous text-like nodes.
internal XPathNodePointer( DataDocumentXPathNavigator owner, XmlDataDocument doc, XmlNode node )
: this ( owner, doc, node, null, false, null ){
}
private DataDocumentXPathNavigator( DataDocumentXPathNavigator other ) {
this._curNode = other._curNode.Clone( this );
this._temp = other._temp.Clone( this );
this._doc = other._doc;
}
internal XPathNodePointer Clone(DataDocumentXPathNavigator owner)
{
RealFoliate();
return new XPathNodePointer(owner, this);
}
