public static IEnumerable <XElement> Ancestors(this XNode node, XName name, bool ignoreNamespace)
{
if (ignoreNamespace)
{
return(node.Ancestors().Where(e => e.Name.LocalName == name.LocalName));
}
else
{
return(node.Ancestors(name));
}
}
private static IEnumerable <XNode> ScanUp([NotNull] this XNode node) =>
node
.NodesBeforeSelf().Prepend(node)
.Concat(
node
.Ancestors()
.SelectMany(n => n.NodesBeforeSelf().Prepend(n)));
private static string ComputeOneLevelOfIndentation(this XNode node)
{
int num = node.Ancestors().Count <XElement>();
XText previousNode = node.PreviousNode as XText;
if ((num == 0) || ((previousNode == null) || !previousNode.IsWhiteSpace()))
{
return(" ");
}
string source = previousNode.Value.Trim(Environment.NewLine.ToCharArray());
return(new string((source.LastOrDefault <char>() == '\t') ? '\t' : ' ', Math.Max(1, source.Length / num)));
}
/// <summary>
/// Returns the parent statement (either expr_stmt, or decl_stmt) of the given node.
/// </summary>
/// <param name="node">The node to search from.</param>
/// <returns>the parent element for <paramref name="node"/>. It will be either <see cref="SRC.ExpressionStatement"/> or <see cref="SRC.DeclarationStatement"/></returns>
public static XElement ParentStatement(this XNode node)
{
if (null == node)
{
throw new ArgumentNullException("node");
}
var ancestors = node.Ancestors().Where(a => a.Name.LocalName.EndsWith("_stmt", StringComparison.OrdinalIgnoreCase));
if (ancestors.Any())
{
return(ancestors.First());
}
return(null);
}
public static CultureInfo SelectCulture(XNode node)
{
var lang =
GetLanguage(node as XElement)
?? GetLanguage(node
.Ancestors()
.FirstOrDefault(elem => GetLanguage(elem) != null));
try
{
return(lang == null ? CultureInfo.InvariantCulture : new CultureInfo(lang));
}
catch (CultureNotFoundException)
{
return(CultureInfo.InvariantCulture);
}
}
private static string ComputeOneLevelOfIndentation(this XNode node)
{
var depth = node.Ancestors().Count();
XText textBeforeOrNull = node.PreviousNode as XText;
if (depth == 0 || textBeforeOrNull == null || !textBeforeOrNull.IsWhiteSpace())
{
return(" ");
}
string indentString = textBeforeOrNull.Value.Trim(Environment.NewLine.ToCharArray());
char lastChar = indentString.LastOrDefault();
char indentChar = (lastChar == '\t' ? '\t' : ' ');
int indentLevel = Math.Max(1, indentString.Length / depth);
return(new string(indentChar, indentLevel));
}
/// <summary>
/// Get the file path relative to <see cref="ProjectDirectory"/> for the unit containing the
/// given node.
/// </summary>
/// <param name="node">The node.</param>
/// <returns>The relative file path to that node.</returns>
public string RelativePath(XNode node)
{
if (null == node)
{
throw new ArgumentNullException("node");
}
var unit = node.Ancestors(SRC.Unit).First();
var path = GetPathForUnit(unit);
int start = this.ProjectDirectory.Length;
if (this.ProjectDirectory[start - 1] != Path.DirectorySeparatorChar)
{
start++;
}
path = path.Substring(start);
return(path);
}
internal static XNode FindTextNode(XNode node)
{
return(node.Ancestors()
.Where(el => el.NodeType == System.Xml.XmlNodeType.Text)
.FirstOrDefault());
}
public static IEnumerable <XElement> AncestorsCaseInsensitive(this XNode source, XName name)
{
return(source.Ancestors().FilterByNameCaseInsensitive(name));
}
/// <summary>
/// Dispatches the event to this <see cref="XNode"/>.
/// </summary>
/// <param name="evt"></param>
/// <returns></returns>
public bool Dispatch(Event evt)
{
Contract.Requires <ArgumentNullException>(evt != null);
trace.Information("EventDispatcher.DispatchEvent: {0} to {1}", evt.Type, node);
if (evt.dispatch ||
evt.initialized == false ||
evt.type == null)
{
throw new DOMException(DOMException.INVALID_STATE_ERR);
}
evt.dispatch = true;
evt.target = node;
// path to root from root
var path = node.Ancestors()
.Cast <XNode>()
.Append(node.Document)
.ToLinkedList();
evt.eventPhase = EventPhase.Capturing;
// capture phase moves from root to target
foreach (var currentTarget in path.Backwards())
{
if (evt.stopPropagation)
{
break;
}
InvokeListeners(currentTarget, evt);
}
// at-target phase
evt.eventPhase = EventPhase.AtTarget;
if (!evt.stopPropagation)
{
InvokeListeners(node, evt);
}
// bubbling phase
if (evt.bubbles)
{
evt.eventPhase = EventPhase.Bubbling;
// bubbling phase moves from target to root
foreach (var currentTarget in path.Forwards())
{
if (evt.stopPropagation)
{
break;
}
InvokeListeners(currentTarget, evt);
}
}
evt.dispatch = false;
evt.eventPhase = EventPhase.None;
evt.currentTarget = null;
if (evt.canceled)
{
return(false);
}
// handle default action
foreach (var da in node.Interfaces <IEventDefaultAction>())
{
if (da != null)
{
da.DefaultAction(evt);
}
}
return(true);
}
