internal int getNonWSCount(XsltContext context)
{
if (NonWSCount == 0)
{
for (int i = 0; i < _Stk.Count; i++)
{
XPathNavigator nav = _Stk[i] as XPathNavigator;
if (nav.NodeType != XPathNodeType.Whitespace || context.PreserveWhitespace(nav))
{
NonWSCount++;
}
}
}
return(NonWSCount);
}
public override object Evaluate(XPathNodeIterator context)
{
XPathNavigator argVal;
switch (_funcType)
{
case FT.FuncPosition:
return((double)context.CurrentPosition);
case FT.FuncLast:
return((double)context.Count);
case FT.FuncNameSpaceUri:
argVal = EvaluateArg(context);
if (argVal != null)
{
return(argVal.NamespaceURI);
}
break;
case FT.FuncLocalName:
argVal = EvaluateArg(context);
if (argVal != null)
{
return(argVal.LocalName);
}
break;
case FT.FuncName:
argVal = EvaluateArg(context);
if (argVal != null)
{
return(argVal.Name);
}
break;
case FT.FuncCount:
_arg.Evaluate(context);
int count = 0;
if (_xsltContext != null)
{
XPathNavigator nav;
while ((nav = _arg.Advance()) != null)
{
if (nav.NodeType != XPathNodeType.Whitespace || _xsltContext.PreserveWhitespace(nav))
{
count++;
}
}
}
else
{
while (_arg.Advance() != null)
{
count++;
}
}
return((double)count);
}
return(string.Empty);
}
/// <summary>
/// When overridden in a derived class, evaluates whether to preserve white space nodes or strip them for the given context.
/// </summary>
/// <param name="node">The white space node that is to be preserved or stripped in the current context.</param>
/// <returns>
/// Returns true if the white space is to be preserved or false if the white space is to be stripped.
/// </returns>
public override bool PreserveWhitespace(XPathNavigator node)
{
return(_baseContext.PreserveWhitespace(node));
}
internal override object getValue(IQuery qyContext)
{
XPathNavigator eNext;
switch (_FType)
{
case FT.FuncPosition:
if (qyContext != null)
{
return((double)qyContext.Position);
}
break;
case FT.FuncLast:
if (qyContext != null)
{
if (checkWhitespace)
{
return((double)((PositionQuery)qyContext).getNonWSCount(context));
}
try {
return((double)((PositionQuery)qyContext).getCount());
}
catch (Exception) {
if (last == -1)
{
last = 0;
IQuery temp = qyContext.Clone();
while (temp.advance() != null)
{
last++;
}
}
return(last);
}
}
break;
case FT.FuncCount:
int i = 0;
_Opnd.setContext(qyContext.peekElement());
if (checkWhitespace)
{
XPathNavigator nav;
while ((nav = _Opnd.advance()) != null)
{
if (nav.NodeType != XPathNodeType.Whitespace || context.PreserveWhitespace(nav))
{
i++;
}
}
return((double)i);
}
while (_Opnd.advance() != null)
{
i++;
}
return((double)i);
case FT.FuncNameSpaceUri:
if (_Opnd != null)
{
_Opnd.setContext(qyContext.peekElement());
if ((eNext = _Opnd.advance()) != null)
{
return(eNext.NamespaceURI);
}
else
{
return(String.Empty);
}
}
return(qyContext.peekElement().NamespaceURI);
case FT.FuncLocalName:
if (_Opnd != null)
{
_Opnd.setContext(qyContext.peekElement().Clone());
if ((eNext = _Opnd.advance()) != null)
{
return(eNext.LocalName);
}
else
{
return(String.Empty);
}
}
return(qyContext.peekElement().LocalName);
case FT.FuncName:
if (_Opnd != null)
{
_Opnd.setContext(qyContext.peekElement().Clone());
if ((eNext = _Opnd.advance()) != null)
{
return(eNext.Name);
}
else
{
return(String.Empty);
}
}
return(qyContext.peekElement().Name);
}
return(String.Empty);
}