Ejemplo n.º 1
0
    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;
    }