// TODO: make this function and its overloads in nongeneric Reflector class simpler by introducing new class storing parameters
private static IEnumerator <DiffNode> EnumerateDiffNodes(ObjectInfo <object> objectInfo, Property thisProperty,
bool expand, PropertyPath propertyPath, object elementKey, IList <object> defaults, Func <DiffNode, bool> nodeSelector, DiffNode resultNode, int stackDepth)
{
nodeSelector = nodeSelector ?? (n => true);
if (objectInfo.ObjectPair.ReferenceEquals() && !expand)
{
yield break;
}
resultNode = resultNode ?? (thisProperty.IsCollectionElement
? new ElementPropertyDiffNode(thisProperty, propertyPath, objectInfo.ObjectPair, elementKey, null, expand)
: new PropertyDiffNode(thisProperty, propertyPath, objectInfo.ObjectPair, null, expand));
var expandAnyways = false;
var auditObjPair = objectInfo.ObjectPair.Transform(AuditLogObject.GetAuditLogObject);
var nameChanged = auditObjPair.OldObject.IsName && auditObjPair.NewObject.IsName &&
auditObjPair.OldObject.AuditLogText != auditObjPair.NewObject.AuditLogText;
if (ReferenceEquals(objectInfo.OldObject, null) && !ReferenceEquals(objectInfo.NewObject, null) &&
auditObjPair.NewObject.IsName || nameChanged &&
// IIdentiyContainer name changes are actually displayed, since we match IIdentiyContainers by their global indices
!typeof(IIdentiyContainer).IsAssignableFrom(thisProperty.GetPropertyType(objectInfo.ObjectPair)))
{
if (!thisProperty.IsRoot)
{
if (!expand)
{
resultNode.IsFirstExpansionNode = true;
}
expandAnyways = expand = true;
}
}
// If the object is an IAuditLogObject but not a name one, we don't care about subproperties
//if (expand && typeof(IAuditLogObject).IsAssignableFrom(thisProperty.GetPropertyType(objectInfo.ObjectPair)) &&
// !auditObjPair.OldObject.IsName && !auditObjPair.NewObject.IsName)
// expand = false;
defaults = defaults ?? new List <object>();
if (expand && Reflector.ProcessDefaults(objectInfo, thisProperty, ref defaults, out var ignore))
{
// Don't expand if we changed to a default object
if (expandAnyways && !ignore && nodeSelector(resultNode)) // Only show this object if it shouldn't be fully ignored if it's a default object (for instance: small molecule only properties)
{
yield return(resultNode);
}
yield break;
}
// We only compare sub properties if both objects are non null, unless we're expanding
// and only the old object is null
if (ReferenceEquals(objectInfo.OldObject, null) && !expand || ReferenceEquals(objectInfo.NewObject, null))
{
if (nodeSelector(resultNode))
{
yield return(resultNode);
}
yield break;
}
// Deal with Collections
var collection = Reflector.GetCollectionInfo(thisProperty.GetPropertyType(objectInfo.ObjectPair),
objectInfo.ObjectPair);
if (collection != null)
{
var nodeIter = Reflector.EnumerateCollectionDiffNodes(objectInfo.ChangeObjectPair(collection.Collections), collection,
thisProperty, propertyPath, expand, defaults, nodeSelector, resultNode, stackDepth);
while (nodeIter.MoveNext())
{
yield return(nodeIter.Current);
}
yield break;
}
// Properties that should directly be checked for equality -- stop recursion
if (!thisProperty.DiffProperties)
{
// Properties that are not TrackParents and not collections are simply compared
// Also make sure that new val doesn't equal any of the default objects
if (nodeSelector(resultNode) && (!objectInfo.ObjectPair.Equals() || expand) &&
(!expand || thisProperty.IgnoreDefaultParent || !defaults.Any(d => Equals(d, objectInfo.ObjectPair.NewObject))))
{
yield return(resultNode);
}
yield break;
}
objectInfo = objectInfo.ChangeParentPair(objectInfo.ObjectPair);
// Compare properties
foreach (var property in _properties)
{
var newPropertyPath = property.AddProperty(propertyPath);
var newObjectInfo = objectInfo
.ChangeOldObject(ReferenceEquals(objectInfo.OldObject, null)
? null
: property.GetValue(objectInfo.OldObject))
.ChangeNewObject(property.GetValue(objectInfo.NewObject));
var valType = property.GetPropertyType(newObjectInfo.ObjectPair);
var nodeIter = Reflector.EnumerateDiffNodes(valType, newObjectInfo, property, expand, newPropertyPath,
null, defaults, nodeSelector, null, stackDepth);
DiffNode current = null;
while (nodeIter.MoveNext())
{
current = nodeIter.Current;
yield return(current);
}
if (current != null)
{
resultNode.Nodes.Add(current);
}
}
// If there are child nodes, we always want to return the parent node,
// but if it's just the root node or a diffparent (meaning only the object reference changed)
// we return null (meaning the objects are equivalent)
if (resultNode.Nodes.Count == 0 && thisProperty.DiffProperties && !expandAnyways)
{
yield break;
}
if (nodeSelector(resultNode))
{
yield return(resultNode);
}
}