/// <summary>
/// Gets the autocomplete data for the specified attribute value.
/// </summary>
public ICompletionData[] GetAttributeValueCompletionData(XmlElementPath path, string name)
{
XmlCompletionDataCollection data = new XmlCompletionDataCollection();
// Locate matching element.
XmlSchemaElement element = FindElement(path);
// Get completion data.
if (element != null)
{
data = GetAttributeValueCompletionData(element, name);
}
return data.ToArray();
}
/// <summary>
/// Gets the child element completion data for the xml element that exists
/// at the end of the specified path.
/// </summary>
public ICompletionData[] GetChildElementCompletionData(XmlElementPath path)
{
XmlCompletionDataCollection data = new XmlCompletionDataCollection();
// Locate matching element.
XmlSchemaElement element = FindElement(path);
// Get completion data.
if (element != null)
{
data = GetChildElementCompletionData(element, path.Elements.LastPrefix);
}
return data.ToArray();
}
/// <summary>
/// Finds the element that exists at the specified path.
/// </summary>
/// <remarks>This method is not used when generating completion data,
/// but is a useful method when locating an element so we can jump
/// to its schema definition.</remarks>
/// <returns><see langword="null"/> if no element can be found.</returns>
public XmlSchemaElement FindElement(XmlElementPath path)
{
XmlSchemaElement element = null;
for (int i = 0; i < path.Elements.Count; ++i)
{
QualifiedName name = path.Elements[i];
if (i == 0)
{
// Look for root element.
element = FindElement(name);
if (element == null)
{
break;
}
}
else
{
element = FindChildElement(element, name);
if (element == null)
{
break;
}
}
}
return element;
}
/// <summary>
/// Gets the attribute completion data for the xml element that exists
/// at the end of the specified path.
/// </summary>
public ICompletionData[] GetAttributeCompletionData(XmlElementPath path)
{
XmlCompletionDataCollection data = new XmlCompletionDataCollection();
// Locate matching element.
XmlSchemaElement element = FindElement(path);
// Get completion data.
if (element != null)
{
prohibitedAttributes.Clear();
data = GetAttributeCompletionData(element);
}
return data.ToArray();
}
/// <summary>
/// Gets the parent element path based on the index position. This
/// method does not compact the path so it will include all elements
/// including those in another namespace in the path.
/// </summary>
static XmlElementPath GetFullParentElementPath(string xml, QualifiedNameCollection namespaces)
{
XmlElementPath path = new XmlElementPath();
IDictionary<string, string> namespacesInScope = null;
using (StringReader reader = new StringReader(xml))
{
using (XmlTextReader xmlReader = new XmlTextReader(reader))
{
try
{
xmlReader.XmlResolver = null; // prevent XmlTextReader from loading external DTDs
while (xmlReader.Read())
{
switch (xmlReader.NodeType)
{
case XmlNodeType.Element:
if (!xmlReader.IsEmptyElement)
{
QualifiedName elementName = new QualifiedName(xmlReader.LocalName, xmlReader.NamespaceURI, xmlReader.Prefix);
path.Elements.Add(elementName);
}
break;
case XmlNodeType.EndElement:
path.Elements.RemoveLast();
break;
}
}
}
catch (XmlException)
{
namespacesInScope = xmlReader.GetNamespacesInScope(XmlNamespaceScope.All);
}
}
}
// Add namespaces in scope for the last element read.
if (namespacesInScope != null)
{
foreach (KeyValuePair<string, string> ns in namespacesInScope)
{
namespaces.Add(new QualifiedName(String.Empty, ns.Value, ns.Key));
}
}
return path;
}
/// <summary>
/// Gets path of the xml element start tag that the specified
/// <paramref name="index"/> is currently inside.
/// </summary>
/// <remarks>If the index outside the start tag then an empty path
/// is returned.</remarks>
/// <param name="index"></param>
/// <param name="xml"></param>
/// <param name="namespaces">Returns the namespaces that are
/// exist in the xml.</param>
static XmlElementPath GetActiveElementStartPath(string xml, int index, QualifiedNameCollection namespaces)
{
XmlElementPath path = new XmlElementPath();
string elementText = GetActiveElementStartText(xml, index);
if (elementText != null)
{
path = GetActiveElementStartPath(xml, index, elementText, namespaces);
}
return path;
}
ICompletionData[] GetChildElementCompletionData(XmlElementPath path)
{
ICompletionData[] completionData = null;
XmlSchemaCompletionData schema = FindSchema(path);
if (schema != null)
{
completionData = schema.GetChildElementCompletionData(path);
}
return completionData;
}
ICompletionData[] GetAttributeValueCompletionData(XmlElementPath path, string name)
{
ICompletionData[] completionData = null;
XmlSchemaCompletionData schema = FindSchema(path);
if (schema != null)
{
completionData = schema.GetAttributeValueCompletionData(path, name);
}
return completionData;
}
/// <summary>
/// Finds the schema given the xml element path.
/// </summary>
public XmlSchemaCompletionData FindSchema(XmlElementPath path)
{
if (path.Elements.Count > 0)
{
string namespaceUri = path.Elements[0].Namespace;
if (namespaceUri.Length > 0)
{
return schemaCompletionDataItems[namespaceUri];
}
else if (defaultSchemaCompletionData != null)
{
// Use the default schema namespace if none
// specified in a xml element path, otherwise
// we will not find any attribute or element matches
// later.
foreach (QualifiedName name in path.Elements)
{
if (name.Namespace.Length == 0)
{
name.Namespace = defaultSchemaCompletionData.NamespaceUri;
}
}
return defaultSchemaCompletionData;
}
}
return null;
}