private static DataContextPropertyPathExtension GetDataContextPropertyPathExtensionInternal(DocumentCompositeNode documentNode, IProperty property)
{
DataContextPathExtensionAttribute contextAttribute = DataContextMetadata.GetDataContextAttribute <DataContextPathExtensionAttribute>(property);
if (contextAttribute == null)
{
return((DataContextPropertyPathExtension)null);
}
IProperty property1 = DataContextMetadata.GetProperty((DocumentNode)documentNode, contextAttribute.Property);
if (property1 == null || property1 == property)
{
return(DataContextPropertyPathExtension.Invalid);
}
return(new DataContextPropertyPathExtension(property1, contextAttribute.IsCollectionItem));
}
private static DataContextProperty GetDataContextPropertyInternal(DocumentCompositeNode documentNode, IProperty property)
{
DataContextValueSourceAttribute contextAttribute = DataContextMetadata.GetDataContextAttribute <DataContextValueSourceAttribute>(property);
if (contextAttribute == null)
{
return((DataContextProperty)null);
}
if (string.IsNullOrEmpty(contextAttribute.DataContextValueSourceProperty))
{
return(DataContextProperty.Invalid);
}
PropertyReference ancestorPath = (PropertyReference)null;
DocumentCompositeNode sourceNode;
if (!string.IsNullOrEmpty(contextAttribute.AncestorPath))
{
DataContextMetadata.AncestorPropertyPath ancestorPropertyPath = DataContextMetadata.AncestorPropertyPathParser.Parse(documentNode, contextAttribute.AncestorPath);
if (ancestorPropertyPath == null)
{
return(DataContextProperty.Invalid);
}
sourceNode = ancestorPropertyPath.AncestorNode;
ancestorPath = ancestorPropertyPath.PropertyPath;
}
else
{
sourceNode = documentNode;
}
if (sourceNode == null)
{
return(DataContextProperty.Invalid);
}
IProperty property1 = DataContextMetadata.GetProperty((DocumentNode)sourceNode, contextAttribute.DataContextValueSourceProperty);
if (property1 == null || property1 == property)
{
return(DataContextProperty.Invalid);
}
return(new DataContextProperty(sourceNode, property1, contextAttribute.IsCollectionItem, ancestorPath));
}