/// <summary>
/// Attempts to locate the reference name in the specified schema.
/// </summary>
/// <param name="name">The reference to look up.</param>
/// <param name="schemaCompletionData">The schema completion data to use to
/// find the reference.</param>
/// <param name="elementName">The element to determine what sort of reference it is
/// (e.g. group, attribute, element).</param>
/// <returns><see langword="null"/> if no match can be found.</returns>
XmlSchemaObject FindSchemaObjectReference(string name, XmlSchemaCompletionProvider schemaCompletionData, string elementName)
{
QualifiedName qualifiedName = schemaCompletionData.CreateQualifiedName(name);
XmlSchemaCompletionProvider qualifiedNameSchema = FindSchema(qualifiedName.Namespace);
if (qualifiedNameSchema != null)
{
schemaCompletionData = qualifiedNameSchema;
}
switch (elementName)
{
case "element":
return(schemaCompletionData.FindElement(qualifiedName));
case "attribute":
return(schemaCompletionData.FindAttribute(qualifiedName.Name));
case "group":
return(schemaCompletionData.FindGroup(qualifiedName.Name));
case "attributeGroup":
return(schemaCompletionData.FindAttributeGroup(qualifiedName.Name));
}
return(null);
}
/// <summary>
/// Gets the XmlSchemaObject that defines the currently selected xml element or attribute.
/// </summary>
/// <param name="currentSchemaCompletionData">This is the schema completion data for the schema currently being
/// displayed. This can be null if the document is not a schema.</param>
public XmlSchemaObject GetSchemaObjectSelected(XmlSchemaCompletionProvider currentSchemaCompletionData)
{
// Find element under cursor.
XmlElementPath path = GetElementPath();
//attribute name under cursor, if valid
string attributeName = null;
XAttribute xatt = Tracker.Engine.Nodes.Peek(0) as XAttribute;
if (xatt != null)
{
XName xattName = xatt.Name;
if (Tracker.Engine.CurrentState is XmlNameState)
{
xattName = GetCompleteName();
}
attributeName = xattName.FullName;
}
// Find schema definition object.
XmlSchemaCompletionProvider schemaCompletionData = FindSchema(path);
XmlSchemaObject schemaObject = null;
if (schemaCompletionData != null)
{
XmlSchemaElement element = schemaCompletionData.FindElement(path);
schemaObject = element;
if (element != null)
{
if (!string.IsNullOrEmpty(attributeName))
{
XmlSchemaAttribute attribute = schemaCompletionData.FindAttribute(element, attributeName);
if (attribute != null)
{
if (currentSchemaCompletionData != null)
{
schemaObject = GetSchemaObjectReferenced(currentSchemaCompletionData, element, attribute);
}
else
{
schemaObject = attribute;
}
}
}
return(schemaObject);
}
}
return(null);
}