// The extended element is the trickiest one becuase the operator gets nested in an extended tag, and
// can be preceded by another element as well. Here's a simple rule:
// &a < b => <reset>a</reset><p>b</p>
// And the extended one for comparison:
// &a < b | c / d => <reset>a</reset><x><context>b</context><p>c</p><extend>d</extend></x>
// The operator tag is inserted inside the "x" tag, and comes after the "context" tag (represented by '|')
private void OnExtendedDifference(object sender, ActionEventArgs args)
{
// There should always at least be 2 nodes by this point - reset and either prefix or expansion
Debug.Assert(_currentNodes.Count >= 2);
IcuDataObject differenceNode = IcuDataObject.CreateElement("x");
IcuDataObject dataNode = IcuDataObject.CreateElement(_currentOperators.Pop());
dataNode.AppendChild(_currentDataObjects.Pop());
IcuDataObject prefixNode = _currentNodes[_currentNodes.Count - 2];
IcuDataObject expansionNode = _currentNodes[_currentNodes.Count - 1];
int deleteCount = 0;
if (expansionNode.Name != "extend")
{
prefixNode = expansionNode;
expansionNode = null;
}
if (prefixNode.Name == "context")
{
differenceNode.AppendChild(prefixNode);
deleteCount++;
}
differenceNode.AppendChild(dataNode);
if (expansionNode != null)
{
differenceNode.AppendChild(expansionNode);
deleteCount++;
}
_currentNodes.RemoveRange(_currentNodes.Count - deleteCount, deleteCount);
_currentNodes.Add(differenceNode);
}
private void OnReset(object sender, ActionEventArgs args)
{
IcuDataObject ido = IcuDataObject.CreateElement(((Spart.Parsers.NonTerminal.Rule)sender).ID);
foreach (IcuDataObject attr in _attributesForReset)
{
ido.AppendChild(attr);
}
ido.AppendChild(_currentDataObjects.Pop());
_currentNodes.Add(ido);
_attributesForReset = new Queue <IcuDataObject>();
}
private void AddXmlNodeWithData(string name)
{
IcuDataObject ido = IcuDataObject.CreateElement(name);
ido.AppendChild(_currentDataObjects.Pop());
_currentNodes.Add(ido);
}
private IcuDataObject CreateOptimizedNode(List <IcuDataObject> nodeGroup)
{
Debug.Assert(nodeGroup != null);
Debug.Assert(nodeGroup.Count > 0);
// one node is already optimized
if (nodeGroup.Count == 1)
{
return(nodeGroup[0]);
}
// luckily the optimized names are the same as the unoptimized with 'c' appended
// so <p> becomes <pc>, <s> to <sc>, et al.
IcuDataObject optimizedNode = IcuDataObject.CreateElement(nodeGroup[0].Name + "c");
foreach (IcuDataObject node in nodeGroup)
{
optimizedNode.AppendChild(IcuDataObject.CreateText(node.InnerText));
}
return(optimizedNode);
}