LinkLabel with BB-Code Style Url support

linkLabelEx.cs

using System.ComponentModel;
using System.Diagnostics;
using System.Drawing.Design;
using System.Text.RegularExpressions;
using System.Windows.Forms;

/*
 * linkLabelEx - Ein Linklabel with BB-Code
 * Copyright (c) 2012 by Maximilian Krauss
 * http://kraussz.com
 * License:
 * Do whatever you want but DO NOT REMOVE THESE CREDITS!
  */

namespace MaximilianKrauss {
	
	internal sealed class linkLabelEx : LinkLabel {
		
		private string _originalText;
		private readonly Regex _urlEx;

		public linkLabelEx() {
			_urlEx = new Regex(@"\[url=([^\]]+)\]([^\]]+)\[\/url\]");
			base.Text = "LinkLabelEx";
			LinkArea = new LinkArea(0, 0);
		}

		//Eigenschaften verstecken, die der Benutzer nicht mehr verwenden können soll:
		[System.ComponentModel.Browsable(false)]
		[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
		public override string Text {
			get {
				return base.Text;
			}
			set {
				base.Text = value;
			}
		}
		[System.ComponentModel.Browsable(false)]
		[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
		public new LinkArea LinkArea {
			get;
			set;
		}

		[Editor("System.ComponentModel.Design.MultilineStringEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
		[Category("Appearance")]
		[Description("The Text associated with the Control.")]
		[Bindable(true)]
		[DefaultValue("")]
		public string linkText {
			get { return _originalText; }
			set {
				_originalText = value;
				parseText();
			}
		}

		[Category("Behavior")]
		[Description("Auto open Links with the default Browser")]
		[DefaultValue(false)]
		public bool autoOpenLinks {
			get;
			set;
		}

		private void parseText() {
			MatchCollection matches = _urlEx.Matches(_originalText);
			this.Text = _originalText;
			this.Links.Clear();
			foreach (Match match in matches) {

				if (match.Groups.Count < 3)
					continue;
				
				string link = match.Groups[1].Value;
				string linkText = match.Groups[2].Value;
				
				this.Text = this.Text.Replace(match.Value, match.Groups[2].Value);

				int linkIndex = this.Text.IndexOf(linkText);
				if (linkIndex == -1)
					continue;

				this.Links.Add(linkIndex, linkText.Length, link);
			}

		}

		protected override void OnLinkClicked(LinkLabelLinkClickedEventArgs e) {
			base.OnLinkClicked(e);

			if (autoOpenLinks && !string.IsNullOrEmpty((string)e.Link.LinkData)) {
				Process.Start((string)e.Link.LinkData);
			}

		}

	}
}