public static FlowDocument ColorizeXAML(string xamlText, FlowDocument targetDoc)
{
XmlTokenizer tokenizer = new XmlTokenizer();
XmlTokenizerMode mode = XmlTokenizerMode.OutsideElement;
List <XmlToken> tokens = tokenizer.Tokenize(xamlText, ref mode);
List <string> tokenTexts = new List <string>(tokens.Count);
List <Color> colors = new List <Color>(tokens.Count);
int position = 0;
foreach (XmlToken token in tokens)
{
string tokenText = xamlText.Substring(position, token.Length);
tokenTexts.Add(tokenText);
Color color = ColorForToken(token, tokenText);
colors.Add(color);
position += token.Length;
}
Paragraph p = new Paragraph();
// Loop through tokens
for (int i = 0; i < tokenTexts.Count; i++)
{
Run r = new Run(tokenTexts[i]);
r.Foreground = new SolidColorBrush(colors[i]);
p.Inlines.Add(r);
}
targetDoc.Blocks.Add(p);
return(targetDoc);
}
/// <summary>
/// Format Xml in the passed rich text box.
/// </summary>
/// <param name="xmlEditor"></param>
public static void FormatXml(RichTextBox xmlEditor)
{
// Stop redrawing
RichTextDrawing.StopRedraw(xmlEditor);
// Tokenize the Xml string
List <XmlToken> tokens = XmlTokenizer.Tokenize(xmlEditor.Text);
foreach (XmlToken token in tokens)
{
xmlEditor.Select(token.Index, token.Text.Length);
switch (token.Type)
{
case XmlTokenType.None:
xmlEditor.SelectionColor = xmlEditor.ForeColor;
break;
case XmlTokenType.SpecialChar:
xmlEditor.SelectionColor = specialCharColor;
break;
case XmlTokenType.Escape:
xmlEditor.SelectionColor = escapeColor;
break;
case XmlTokenType.Element:
xmlEditor.SelectionColor = elementColor;
break;
case XmlTokenType.Attribute:
xmlEditor.SelectionColor = attributeColor;
break;
case XmlTokenType.Value:
xmlEditor.SelectionColor = valueColor;
break;
case XmlTokenType.Comment:
xmlEditor.SelectionColor = commentColor;
break;
}
}
// Sample code to show that the perf problem is a RichTexBox problem
//string content = xmlEditor.Text;
//Random gen = new Random();
//for (int i = 0; i < content.Length; i++)
//{
// xmlEditor.Select(i, 1);
// Color c = Color.FromArgb(gen.Next(256), gen.Next(256), gen.Next(256));
// xmlEditor.SelectionColor = c;
//}
// Resume redraw
RichTextDrawing.RestoreRedraw(xmlEditor);
}
