|
public TakeChildren ( |
||
| from | ||
| return | void | |
public override QueryNode Trim()
{
// Trim depth first
List<QueryNode> copy = new List<QueryNode> (Children);
foreach (QueryNode child in copy)
child.Trim ();
if (Keyword == Keyword.Not) {
if (ChildCount != 1) {
if (Parent != null) {
Parent.RemoveChild (this);
} else {
return null;
}
}
} else {
if (ChildCount <= 1) {
if (Parent != null) {
QueryListNode p = Parent;
p.RemoveChild (this);
p.TakeChildren (this);
} else if (ChildCount == 1) {
Children[0].Parent = null;
return Children[0];
}
}
}
return this;
}
void ParseToken(QueryToken token)
{
switch (token.ID)
{
case TokenID.OpenParen:
DepthPush();
break;
case TokenID.CloseParen:
DepthPop();
break;
case TokenID.Not:
NodePush(new QueryListNode(Keyword.Not));
break;
case TokenID.Or:
case TokenID.And:
// Only push a node if the current_parent is not the same as this token
if (current_parent.Keyword == Keyword.Not ||
current_parent.Keyword == (token.ID == TokenID.Or ? Keyword.And : Keyword.Or))
{
var list = new QueryListNode(token.ID == TokenID.Or ? Keyword.Or : Keyword.And);
var p = current_parent.Parent;
if (p != null)
{
current_parent.Parent.RemoveChild(current_parent);
}
if (current_parent.Keyword == Keyword.Not || current_parent.ChildCount > 1)
{
list.AddChild(current_parent);
}
else
{
list.TakeChildren(current_parent);
}
current_parent = p;
NodePush(list);
}
break;
case TokenID.Term:
NodePush(QueryTermNode.ParseUserQuery(field_set, token.Term));
break;
}
}
private void ParseToken(QueryToken token)
{
switch (token.ID) {
case TokenID.OpenParen:
DepthPush ();
break;
case TokenID.CloseParen:
DepthPop ();
break;
case TokenID.Not:
NodePush (new QueryListNode (Keyword.Not));
break;
case TokenID.Or:
case TokenID.And:
// Only push a node if the current_parent is not the same as this token
if (current_parent.Keyword == Keyword.Not ||
current_parent.Keyword == (token.ID == TokenID.Or ? Keyword.And : Keyword.Or)) {
QueryListNode list = new QueryListNode (token.ID == TokenID.Or ? Keyword.Or : Keyword.And);
QueryListNode p = current_parent.Parent;
if (p != null) {
current_parent.Parent.RemoveChild (current_parent);
}
if (current_parent.Keyword == Keyword.Not || current_parent.ChildCount > 1) {
list.AddChild (current_parent);
} else {
list.TakeChildren (current_parent);
}
current_parent = p;
NodePush (list);
}
break;
case TokenID.Term:
NodePush (QueryTermNode.ParseUserQuery (field_set, token.Term));
break;
}
}
