//-------------------------------------------------
public Node RelativeNode(NodeRelationships Relationship_in)
{
Node nodePrev = _PrevNode;
Node nodeNext = _NextNode;
Node nodeRoot = this;
Node nodeSib = this;
Node nodeChild = null;
while (true)
{
if ((Relationship_in == NodeRelationships.None))
{
break;
}
else if ((Relationship_in == NodeRelationships.PrevNode))
{
return(_PrevNode);
}
else if ((Relationship_in == NodeRelationships.NextNode))
{
return(_NextNode);
}
else if ((Relationship_in == NodeRelationships.FirstNode))
{
if ((nodePrev == null))
{
return(this);
}
if ((nodePrev._PrevNode == null))
{
return(nodePrev);
}
nodePrev = nodePrev._PrevNode;
}
else if ((Relationship_in == NodeRelationships.LastNode))
{
if ((nodeNext == null))
{
return(this);
}
if ((nodeNext._NextNode == null))
{
return(nodeNext);
}
nodeNext = nodeNext._NextNode;
}
else if ((Relationship_in == NodeRelationships.RootNode))
{
if ((nodePrev == null))
{
return(nodeRoot);
}
if ((nodePrev._Indent < nodeRoot._Indent))
{
nodeRoot = nodePrev;
}
nodePrev = nodePrev._PrevNode;
}
else if ((Relationship_in == NodeRelationships.ParentNode))
{
if ((nodePrev == null))
{
break;
}
if ((nodePrev._Indent < _Indent))
{
return(nodePrev);
}
nodePrev = nodePrev._PrevNode;
}
else if ((Relationship_in == NodeRelationships.PrevSibNode))
{
if ((nodePrev == null))
{
break;
}
if ((nodePrev._Indent < _Indent))
{
break;
}
if ((nodePrev._Indent == _Indent))
{
return(nodePrev);
}
nodePrev = nodePrev._PrevNode;
}
else if ((Relationship_in == NodeRelationships.NextSibNode))
{
if ((nodeNext == null))
{
break;
}
if ((nodeNext._Indent < _Indent))
{
break;
}
if ((nodeNext._Indent == _Indent))
{
return(nodeNext);
}
nodeNext = nodeNext._NextNode;
}
else if ((Relationship_in == NodeRelationships.FirstSibNode))
{
if ((nodePrev == null))
{
return(nodeSib);
}
if ((nodePrev._Indent < _Indent))
{
return(nodeSib);
}
if ((nodePrev._Indent == _Indent))
{
nodeSib = nodePrev;
}
nodePrev = nodePrev._PrevNode;
}
else if ((Relationship_in == NodeRelationships.LastSibNode))
{
if ((nodeNext == null))
{
return(nodeSib);
}
if ((nodeNext._Indent < _Indent))
{
return(nodeSib);
}
if ((nodeNext._Indent == _Indent))
{
nodeSib = nodeNext;
}
nodeNext = nodeNext._NextNode;
}
else if ((Relationship_in == NodeRelationships.FirstChildNode))
{
if ((nodeNext == null))
{
break;
}
if ((nodeNext._Indent <= _Indent))
{
break;
}
if ((nodeNext._Indent == (_Indent + 1)))
{
return(nodeNext);
}
nodeNext = nodeNext._NextNode;
}
else if ((Relationship_in == NodeRelationships.LastChildNode))
{
if ((nodeNext == null))
{
return(nodeChild);
}
if ((nodeNext._Indent <= _Indent))
{
return(nodeChild);
}
if ((nodeNext._Indent == (_Indent + 1)))
{
nodeChild = nodeNext;
}
nodeNext = nodeNext._NextNode;
}
else if ((Relationship_in == NodeRelationships.FirstDescNode))
{
if ((nodeNext != null))
{
if ((nodeNext._Indent > _Indent))
{
return(nodeNext);
}
}
break;
}
else if ((Relationship_in == NodeRelationships.LastDescNode))
{
if ((nodeNext == null))
{
return(nodeChild);
}
if ((nodeNext._Indent <= _Indent))
{
return(nodeChild);
}
if ((nodeNext._Indent > _Indent))
{
nodeChild = nodeNext;
}
nodeNext = nodeNext._NextNode;
}
else
{
break;
}
}
return(null);
}
public static IEnumerable <HtmlNode> GetNodesThatMatchTheCondition(this HtmlNode node, NodeRelationships relationship, MarkerAttributes markerAttribute)
{
// TODO: refactor this!
switch (relationship)
{
case NodeRelationships.Self:
var result = node.HasAttribute(markerAttribute) ? new List <HtmlNode> {
node
} : new List <HtmlNode> {
null
};
return(result);
case NodeRelationships.Sibling:
// TODO: write better code!
return(new List <HtmlNode> {
null
});
case NodeRelationships.Parent:
return(node.ParentNode.HasAttribute(markerAttribute) ? new List <HtmlNode> {
node.ParentNode
} : new List <HtmlNode> {
null
});
case NodeRelationships.Ancestor:
return(node.Ancestors().Any(ancestor => ancestor.HasAttribute(markerAttribute))
? node.Ancestors().Where(ancestor => ancestor.HasAttribute(markerAttribute)).ToList()
: new List <HtmlNode> {
null
});
case NodeRelationships.Child:
return(node.ChildNodes.Any(childNode => childNode.HasAttribute(markerAttribute))
? node.ChildNodes.Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
: new List <HtmlNode> {
null
});
//return node.SelectNodes("*").Any(childNode => childNode.HasAttribute(markerAttribute))
// ? node.SelectNodes("*").Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
// : new List<HtmlNode> { null };
case NodeRelationships.Descendant:
//return node.Descendants().Any(descendant => descendant.HasAttribute(markerAttribute))
// ? node.Descendants().Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
// : new List<HtmlNode> { null };
var result2 = node.Descendants().Any(descendant => descendant.HasAttribute(markerAttribute))
? node.Descendants().Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
: new List <HtmlNode> {
null
};
//var result2 = node.SelectNodes("*").Any(descendant => descendant.HasAttribute(markerAttribute))
// ? node.SelectNodes("*").Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
// : new List<HtmlNode> { null };
return(result2);
default:
return(new List <HtmlNode> {
null
});
}
}
