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) {
var result = schemaCompletionDataItems[namespaceUri];
if (result == null && defaultSchemaCompletionData.NamespaceUri == namespaceUri) result = defaultSchemaCompletionData;
return result;
} 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;
}
ICompletionData[] GetChildElementCompletionData(XmlElementPath path)
{
ICompletionData[] completionData = null;
XmlSchemaCompletionData schema = FindSchema(path);
if (schema != null) {
completionData = schema.GetChildElementCompletionData(path);
}
return completionData;
}
/// <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>
public static XmlElementPath GetActiveElementStartPath(string xml, int index)
{
XmlElementPath path = new XmlElementPath();
string elementText = GetActiveElementStartText(xml, index);
if (elementText != null)
{
QualifiedName elementName = GetElementName(elementText);
NamespaceURI elementNamespace = GetElementNamespace(elementText);
path = GetParentElementPathCore(xml.Substring(0, index));
string namespaceUri;
if (elementNamespace.Namespace.Length == 0
&& !string.IsNullOrEmpty(elementName.Prefix)
&& path.Namespaces != null
&& path.Namespaces.TryGetValue(elementName.Prefix, out namespaceUri))
{
elementNamespace.Namespace = namespaceUri;
elementNamespace.Prefix = elementName.Prefix;
}
path.Elements.Add(new QualifiedName(elementName.Name, elementNamespace.Namespace, elementNamespace.Prefix));
path.Compact(elementNamespace.Namespace);
}
return path;
}
public virtual IEnumerable <ICompletionData> HandleTextEntered(ITextSource source, int caret, string insertText = null)
{
insertText = insertText ?? source.GetText(caret - 1, 1);
var text = source.GetText(0, caret);
ICompletionData[] result = null;
IEnumerable <XmlElementPath> parentPaths;
switch (insertText)
{
case "=":
// Namespace intellisense.
if (XmlParser.IsNamespaceDeclaration(text, text.Length))
{
result = schemaCompletionDataItems.GetNamespaceCompletionData();
}
break;
case "<":
// Child element intellisense.
parentPaths = XmlParser.GetParentElementPaths(text);
if (parentPaths.Any())
{
foreach (var path in parentPaths)
{
result = GetChildElementCompletionData(path);
if (result.Any())
{
break;
}
}
}
else if (defaultSchemaCompletionData != null)
{
result = defaultSchemaCompletionData.GetElementCompletionData(defaultNamespacePrefix).ToArray();
}
break;
case " ":
// Attribute intellisense.
if (!XmlParser.IsInsideAttributeValue(text, text.Length))
{
XmlElementPath path = XmlParser.GetActiveElementStartPath(text, text.Length);
if (path.Elements.Count > 0)
{
result = GetAttributeCompletionData(path);
}
}
break;
default:
// Attribute value intellisense.
if (XmlParser.IsAttributeValueChar(insertText[0]))
{
string attributeName = XmlParser.GetAttributeName(text, text.Length);
if (attributeName.Length > 0)
{
XmlElementPath elementPath = XmlParser.GetActiveElementStartPath(text, text.Length);
if (elementPath.Elements.Count > 0)
{
//preSelection = insertText.ToString();
result = GetAttributeValueCompletionData(elementPath, attributeName);
}
}
}
break;
}
if (result != null)
{
return(result.OrderBy(x => x.Text));
}
return(Enumerable.Empty <ICompletionData>());
}
public static XmlElementPath GetParentElementPathCore(string xml)
{
XmlElementPath path = new XmlElementPath();
try
{
StringReader reader = new StringReader(xml);
XmlTextReader xmlReader = new XmlTextReader(reader);
xmlReader.XmlResolver = null;
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);
path.Namespaces = xmlReader.GetNamespacesInScope(XmlNamespaceScope.All);
}
break;
case XmlNodeType.EndElement:
path.Elements.RemoveLast();
break;
}
}
}
catch (XmlException)
{
// Do nothing.
}
catch (WebException)
{
// Do nothing.
}
return path;
}
/// <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 virtual XmlSchemaElement FindElement(XmlElementPath path)
{
_namespaces = path.Namespaces;
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 autocomplete data for the specified attribute value.
/// </summary>
public ICompletionData[] GetAttributeValueCompletionData(XmlElementPath path, string name)
{
_namespaces = path.Namespaces;
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)
{
_namespaces = path.Namespaces;
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>
/// 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();
}
