/// <summary>
/// Reads all variations specified in current scenario.
/// Setup to read only when required when the default tree is being parsed for example.
/// </summary>
internal virtual void ReadVariations()
{
if (currentscenarionode == null)
{
UtilsLogger.LogDiagnostic = "Current scenario is null, there is no variations to read.";
return;
}
if (currentscenarionode.HasChildNodes == false)
{
UtilsLogger.LogDiagnostic = "Current scenario does not contain any Variations";
return;
}
// In Scenario elements nested Variation elements are not allowed.
// Thus the loop here only looks for child elements of the Scenario node.
// If there are nested Variation elements an Exception will be thrown when the
// variation is initialized.
// If a non-variation element is found that element is stored in a list for processing
// by later processing.
for (int i = 0; i < currentscenarionode.ChildNodes.Count; i++)
{
if (currentscenarionode.ChildNodes[i] == null)
{
continue;
}
switch (currentscenarionode.ChildNodes[i].Name)
{
case Constants.NodeVariationElement:
NodeVariation newnodevariation = new NodeVariation();
newnodevariation.Initialize(currentscenarionode.ChildNodes[i]);
nodevariationList.Add(newnodevariation.ID, newnodevariation);
// if (nodevariationList.ContainsKey(newnodevariation.ID))
// {
// nodevariationList.Add(Convert.ToInt32(GenerateRandomNumber()) + "_" + newnodevariation.ID, newnodevariation);
// }
// else
// {
// nodevariationList.Add(newnodevariation.ID, newnodevariation);
// }
break;
case Constants.AttributeVariationElement:
AttributeVariation newattribvariation = new AttributeVariation();
newattribvariation.Initialize(currentscenarionode.ChildNodes[i]);
attributeVariationList.Add(newattribvariation);
break;
case Constants.TextVariationElement:
TextVariation newtextvariation = new TextVariation();
newtextvariation.Initialize(currentscenarionode.ChildNodes[i]);
textVariationList.Add(newtextvariation.ID, newtextvariation);
break;
case Constants.RootNodeVariationElement:
if (rootnodevariation != null)
{
throw new ApplicationException("No more than one RootNodeVariation can be specified in the document.");
}
rootnodevariation = new RootNodeVariation();
rootnodevariation.Initialize(currentscenarionode.ChildNodes[i]);
break;
default:
if (unrecognizednodeslist == null)
{
unrecognizednodeslist = new List <XmlNode>();
}
unrecognizednodeslist.Add(currentscenarionode.ChildNodes[i]);
break;
}
}
if (nodevariationList.Count == 0 && attributeVariationList.Count == 0 && textVariationList.Count == 0)
{
// Todo: Removed this exception to allow changing only filename for a variation.
//throw new NotSupportedException("Current scenario does not contain any supported variations.");
}
}
/// <summary>
/// Attribute variation is a little special as there can be multiple of them specified in the
/// Scenario to change multiple Attributes on a element.
/// For this we keep looping until all the variations are processed.
/// </summary>
/// <param name="node"></param>
/// <returns></returns>
private bool ApplyAttributeVariation(XmlNode node)
{
if (currentScenario == null)
{
// There nothing to do.
return(false);
}
if (node.HasChildNodes == false)
{
// Todo: Attribute variation has to have one child node. Throw exception
return(false);
}
if (node.ChildNodes.Count > 1)
{
// Todo: Only one allowed. Throw exception
return(false);
}
AttributeVariation temp = new AttributeVariation();
temp.Initialize(node);
string nodeid = temp.ID;
if (variationids.Count != 0)
{
if (variationids.Contains(nodeid) == false)
{
RestoreDefaults(node, temp.attributestable);
return(true);
}
}
else if (variationids.Contains(nodeid) == false)
{
RestoreDefaults(node, temp.attributestable);
return(false);
}
AttributeVariation attributevariation = currentScenario.GetAttributeVariation(nodeid);
if (attributevariation == null)
{
RestoreDefaults(node, temp.attributestable);
return(true);
}
// Loop until there are no more attributevariations with the same id to process.
XmlNode nodetomodify = null;
do
{
if (nodetomodify == null)
{
nodetomodify = node.ChildNodes[0];
}
if (nodetomodify.Attributes.Count == 0)
{
// Nothing to change.
attributevariation = null;
RestoreDefaults(node, temp.attributestable);
return(true);
}
// Change the attribute if it is found on the node.
XmlAttribute attrib = nodetomodify.Attributes[attributevariation.AttributeName];
if (attrib != null)
{
if (attributevariation.RemoveAttribute == false)
{
attrib.Value = attributevariation.AttributeValue;
}
else
{
XmlNode parentnode = (XmlNode)attrib.OwnerElement;
parentnode.Attributes.Remove(attrib);
}
}
else
{
attrib = nodetomodify.OwnerDocument.CreateAttribute(attributevariation.AttributeName);
attrib.Value = attributevariation.AttributeValue;
nodetomodify.Attributes.Append(attrib);
}
NodeVariationApplied(node.ParentNode, nodetomodify, attributevariation.attributestable);
currentScenario.RemoveAttributeVariation(nodeid);
// Delete the node and the variation id from the list only when there are no more
// variations with the same ID to apply.
attributevariation = currentScenario.GetAttributeVariation(nodeid);
if (attributevariation == null)
{
XmlNode parentnode = node.ParentNode;
parentnode.InsertAfter(nodetomodify, node);
parentnode.RemoveChild(node);
variationids.Remove(nodeid);
}
} while (attributevariation != null);
CleanupPlaceHolder();
return(true);
}