private static XmlNodeList SelectAllAttributes(XmlNode parentNode)
{
XmlAttributeCollection attributes = parentNode.Attributes;
if (attributes.Count == 0)
{
OnNoMatchingNode("@*");
return(null);
}
else if (attributes.Count == 1)
{
XmlPatchNodeList nodeList = new SingleNodeList();
nodeList.AddNode(attributes.Item(0));
return(nodeList);
}
else
{
IEnumerator enumerator = attributes.GetEnumerator();
XmlPatchNodeList nodeList = new MultiNodeList();
while (enumerator.MoveNext())
{
nodeList.AddNode((XmlNode)enumerator.Current);
}
return(nodeList);
}
}
private static XmlNodeList SelectAllChildren(XmlNode parentNode)
{
XmlNodeList children = parentNode.ChildNodes;
if (children.Count == 0)
{
OnNoMatchingNode("*");
return(null);
}
else if (children.Count == 1)
{
XmlPatchNodeList nodeList = new SingleNodeList();
nodeList.AddNode(children.Item(0));
return(nodeList);
}
else
{
IEnumerator enumerator = children.GetEnumerator();
XmlPatchNodeList nodeList = new MultiNodeList();
while (enumerator.MoveNext())
{
nodeList.AddNode((XmlNode)enumerator.Current);
}
return(nodeList);
}
}
private static XmlNodeList SelectAbsoluteNodes( XmlNode rootNode, string path )
{
Debug.Assert( path[0] == '/' );
int pos = 1;
XmlNode node = rootNode;
for (;;)
{
int startPos = pos;
XmlNodeList childNodes = node.ChildNodes;
int nodePos = ReadPosition( path, ref pos );
if ( pos == path.Length || path[pos] == '/' ) {
if ( childNodes.Count == 0 || nodePos < 0 || nodePos > childNodes.Count )
OnNoMatchingNode( path );
node = childNodes.Item( nodePos - 1 );
if ( pos == path.Length ) {
XmlPatchNodeList list = new SingleNodeList();
list.AddNode( node );
return list;
}
pos++;
}
else {
if ( path[pos] == '-' || path[pos] == '|' ) {
return SelectChildNodes( node, path, startPos );
}
OnInvalidExpression( path );
}
}
}
private static XmlNodeList SelectAbsoluteNodes(XmlNode rootNode, string path)
{
Debug.Assert(path[0] == '/');
int pos = 1;
XmlNode node = rootNode;
for (;;)
{
int startPos = pos;
XmlNodeList childNodes = node.ChildNodes;
int nodePos = ReadPosition(path, ref pos);
if (pos == path.Length || path[pos] == '/')
{
if (childNodes.Count == 0 || nodePos < 0 || nodePos > childNodes.Count)
{
OnNoMatchingNode(path);
}
node = childNodes.Item(nodePos - 1);
if (pos == path.Length)
{
XmlPatchNodeList list = new SingleNodeList();
list.AddNode(node);
return(list);
}
pos++;
}
else
{
if (path[pos] == '-' || path[pos] == '|')
{
return(SelectChildNodes(node, path, startPos));
}
OnInvalidExpression(path);
}
}
}
private static XmlNodeList SelectAllChildren( XmlNode parentNode )
{
XmlNodeList children = parentNode.ChildNodes;
if ( children.Count == 0 )
{
OnNoMatchingNode( "*" );
return null;
}
else if ( children.Count == 1 )
{
XmlPatchNodeList nodeList = new SingleNodeList();
nodeList.AddNode( children.Item( 0 ) );
return nodeList;
}
else
{
IEnumerator enumerator = children.GetEnumerator();
XmlPatchNodeList nodeList = new MultiNodeList();
while ( enumerator.MoveNext() )
nodeList.AddNode( (XmlNode) enumerator.Current );
return nodeList;
}
}
private static XmlNodeList SelectAllAttributes( XmlNode parentNode )
{
XmlAttributeCollection attributes = parentNode.Attributes;
if ( attributes.Count == 0 )
{
OnNoMatchingNode( "@*" );
return null;
}
else if ( attributes.Count == 1 )
{
XmlPatchNodeList nodeList = new SingleNodeList();
nodeList.AddNode( attributes.Item( 0 ) );
return nodeList;
}
else
{
IEnumerator enumerator = attributes.GetEnumerator();
XmlPatchNodeList nodeList = new MultiNodeList();
while ( enumerator.MoveNext() )
nodeList.AddNode( (XmlNode) enumerator.Current );
return nodeList;
}
}