private string GetId(ICSharpCode.AvalonEdit.Document.IDocument doc, ICSharpCode.AvalonEdit.Editing.Caret caret)
{
string amlQuery;
var settings = new System.Xml.XmlReaderSettings();
System.IO.TextReader reader;
if (this.Helper == null)
{
reader = doc.CreateReader();
}
else
{
amlQuery = this.Helper.GetCurrentQuery(doc, caret.Offset);
var loc = doc.GetLocation(doc.IndexOf(amlQuery, 0, doc.TextLength, StringComparison.Ordinal));
reader = new System.IO.StringReader(amlQuery);
settings.LineNumberOffset = loc.Line;
}
string lastItemId = null;
string lastId = null;
var elems = new Stack<string>();
using (reader)
using (var xmlReader = System.Xml.XmlReader.Create(reader))
{
var lineInfo = (System.Xml.IXmlLineInfo)xmlReader;
while (xmlReader.Read())
{
switch (xmlReader.NodeType)
{
case System.Xml.XmlNodeType.Element:
case System.Xml.XmlNodeType.EndElement:
if (lineInfo.LineNumber > this.editor.TextArea.Caret.Line
|| (lineInfo.LineNumber == this.editor.TextArea.Caret.Line && (lineInfo.LinePosition - 1) > this.editor.TextArea.Caret.Column))
{
return lastId ?? lastItemId;
}
break;
}
switch (xmlReader.NodeType)
{
case System.Xml.XmlNodeType.Element:
switch (xmlReader.LocalName)
{
case "Item":
lastItemId = xmlReader.GetAttribute("id");
lastId = xmlReader.GetAttribute("id");
break;
}
if (!xmlReader.IsEmptyElement) elems.Push(xmlReader.LocalName);
break;
case System.Xml.XmlNodeType.Text:
if (xmlReader.Value.IsGuid())
{
switch (elems.Peek())
{
case "id":
lastItemId = xmlReader.Value;
break;
default:
lastId = xmlReader.Value;
break;
}
}
break;
case System.Xml.XmlNodeType.EndElement:
lastId = null;
if (elems.Pop() == "Item")
{
lastItemId = null;
}
break;
}
}
}
return null;
}