void GetChildElementCompletionData(XmlSchemaCompletionBuilder data, XmlSchemaObjectCollection items, string prefix)
{
foreach (XmlSchemaObject schemaObject in items)
{
var childElement = schemaObject as XmlSchemaElement;
if (childElement != null)
{
string name = childElement.Name;
if (name == null)
{
name = childElement.RefName.Name;
var element = FindElement(childElement.RefName);
if (element != null)
{
if (element.IsAbstract)
{
AddSubstitionGroupElements(data, element.QualifiedName, prefix);
}
else
{
data.AddElement(name, prefix, element.Annotation);
}
}
else
{
data.AddElement(name, prefix, childElement.Annotation);
}
}
else
{
data.AddElement(name, prefix, childElement.Annotation);
}
continue;
}
var childSequence = schemaObject as XmlSchemaSequence;
if (childSequence != null)
{
GetChildElementCompletionData(data, childSequence.Items, prefix);
continue;
}
var childChoice = schemaObject as XmlSchemaChoice;
if (childChoice != null)
{
GetChildElementCompletionData(data, childChoice.Items, prefix);
continue;
}
var groupRef = schemaObject as XmlSchemaGroupRef;
if (groupRef != null)
{
GetChildElementCompletionData(data, groupRef, prefix);
continue;
}
}
}
/// <summary>
/// Adds any elements that have the specified substitution group.
/// </summary>
void AddSubstitionGroupElements(XmlSchemaCompletionBuilder data, XmlQualifiedName group, string prefix)
{
foreach (XmlSchemaElement element in schema.Elements.Values)
{
if (element.SubstitutionGroup == group)
{
data.AddElement(element.Name, prefix, element.Annotation);
}
}
}
/// <summary>
/// Gets the possible root elements for an xml document using this schema.
/// </summary>
public async Task <CompletionContext> GetElementCompletionDataAsync(IAsyncCompletionSource source, string namespacePrefix, CancellationToken token)
{
await EnsureLoadedAsync();
var builder = new XmlSchemaCompletionBuilder(source);
foreach (XmlSchemaElement element in schema.Elements.Values)
{
if (element.Name != null)
{
builder.AddElement(element.Name, namespacePrefix, element.Annotation);
}
else
{
// Do not add reference element.
}
}
return(new CompletionContext(builder.GetItems()));
}
