public static void SetLinkedText(this BetterRichTextbox richTextBox, string htmlFragment)
{
var regEx = new Regex(
@"\<a\s(href\=""|[^\>]+?\shref\="")(?<link>[^""]+)"".*?\>(?<text>.*?)(\<\/a\>|$)",
RegexOptions.IgnoreCase | RegexOptions.Multiline);
richTextBox.Blocks.Clear();
int nextOffset = 0;
foreach (Match match in regEx.Matches(htmlFragment))
{
if (match.Index > nextOffset)
{
string url = match.Groups["link"].Value.TrimStart('/');
if (!url.Contains("http://"))
{
url = "http://" + url;
}
richTextBox.AppendText(htmlFragment.Substring(nextOffset, match.Index - nextOffset));
nextOffset = match.Index + match.Length;
richTextBox.AppendLink(match.Groups["text"].Value, new Uri(url));
}
Debug.WriteLine(match.Groups["text"] + ":" + match.Groups["link"]);
}
if (nextOffset < htmlFragment.Length)
{
richTextBox.AppendText(htmlFragment.Substring(nextOffset));
}
}
public static void AppendText(this BetterRichTextbox richTextBox, string text)
{
Paragraph paragraph;
if (richTextBox.Blocks.Count == 0 ||
(paragraph = richTextBox.Blocks[richTextBox.Blocks.Count - 1] as Paragraph) == null)
{
paragraph = new Paragraph();
richTextBox.Blocks.Add(paragraph);
}
paragraph.Inlines.Add(new Run {
Text = text
});
}
public static void AppendLink(this BetterRichTextbox richTextBox, string text, Uri uri)
{
Paragraph paragraph;
if (richTextBox.Blocks.Count == 0 ||
(paragraph = richTextBox.Blocks[richTextBox.Blocks.Count - 1] as Paragraph) == null)
{
paragraph = new Paragraph();
richTextBox.Blocks.Add(paragraph);
}
var run = new Run {
Text = text
};
var link = new Hyperlink {
NavigateUri = uri, TargetName = "_blank", Foreground = Application.Current.Resources["OrangeBrush"] as Brush
};
link.Inlines.Add(run);
paragraph.Inlines.Add(link);
}
