private void CompileConditions(Compiler compiler) {
NavigatorInput input = compiler.Input;
bool when = false;
bool otherwise = false;
do {
switch (input.NodeType) {
case XPathNodeType.Element:
compiler.PushNamespaceScope();
string nspace = input.NamespaceURI;
string name = input.LocalName;
if (Keywords.Equals(nspace, input.Atoms.XsltNamespace)) {
IfAction action = null;
if (Keywords.Equals(name, input.Atoms.When)) {
if (otherwise) {
throw XsltException.Create(Res.Xslt_WhenAfterOtherwise);
}
action = compiler.CreateIfAction(IfAction.ConditionType.ConditionWhen);
when = true;
}
else if (Keywords.Equals(name, input.Atoms.Otherwise)) {
if (otherwise) {
throw XsltException.Create(Res.Xslt_DupOtherwise);
}
action = compiler.CreateIfAction(IfAction.ConditionType.ConditionOtherwise);
otherwise = true;
}
else {
throw compiler.UnexpectedKeyword();
}
AddAction(action);
}
else {
throw compiler.UnexpectedKeyword();
}
compiler.PopScope();
break;
case XPathNodeType.Comment:
case XPathNodeType.ProcessingInstruction:
case XPathNodeType.Whitespace:
case XPathNodeType.SignificantWhitespace:
break;
default:
throw XsltException.Create(Res.Xslt_InvalidContents, Keywords.s_Choose);
}
}
while (compiler.Advance());
if (! when) {
throw XsltException.Create(Res.Xslt_NoWhen);
}
}
}
