From edef9894af198da690c0381bf43d4dafddf16f0d Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Fri, 1 Feb 2013 04:13:36 +0400
Subject: replace RichTextBox and Attached Property with subclassed RichTextBox
 and plain Dependency Property. Somehow fixes #11

---
 Juick/Controls/HyperLinkRichTextBox.cs | 80 ++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 Juick/Controls/HyperLinkRichTextBox.cs

(limited to 'Juick/Controls')

diff --git a/Juick/Controls/HyperLinkRichTextBox.cs b/Juick/Controls/HyperLinkRichTextBox.cs
new file mode 100644
index 0000000..6ec6883
--- /dev/null
+++ b/Juick/Controls/HyperLinkRichTextBox.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Media;
+
+namespace Juick.Controls
+{
+    public class HyperLinkRichTextBox : RichTextBox
+    {
+        static readonly Regex UrlRegex = new Regex(@"http(s)?://([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?", RegexOptions.Compiled);
+        // TODO: Add more entities
+        static readonly Regex JuickEntityRegex = new Regex(@"#(\d+)(/\d+)?", RegexOptions.Compiled);
+        public static readonly DependencyProperty TextProperty =
+            DependencyProperty.Register("Text", typeof(string), typeof(HyperLinkRichTextBox), new PropertyMetadata(default(string), TextPropertyChanged));
+
+        public string Text
+        {
+            get { return (string)GetValue(TextProperty); }
+            set { SetValue(TextProperty, value); }
+        }
+
+        private static void TextPropertyChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
+        {
+            var richTextBox = (HyperLinkRichTextBox)dependencyObject;
+            var stringValue = (string)dependencyPropertyChangedEventArgs.NewValue;
+            var paragraph = new Paragraph();
+
+            var index = 0;
+            foreach (var match in UrlRegex.Matches(stringValue).OfType<Match>().Union(JuickEntityRegex.Matches(stringValue).OfType<Match>()))
+            {
+                Uri uri = null;
+                if (!Uri.TryCreate(match.Value, UriKind.Absolute, out uri))
+                {
+                    // Juick entity
+                    uri = new Uri(string.Format("/ThreadView.xaml?mid={0}", JuickEntityRegex.Replace(match.Value, "$1")), UriKind.Relative);
+                }
+                if (match.Index > 0)
+                {
+                    var length = match.Index - index;
+                    if (length > 0)
+                    {
+                        paragraph.Inlines.Add(new Run { Text = stringValue.Substring(index, length) });
+                    }
+                }
+
+                var hyperLink = new Hyperlink
+                {
+                    NavigateUri = uri
+                };
+                if (uri.IsAbsoluteUri)
+                {
+                    hyperLink.TargetName = "_blank";
+                    hyperLink.Inlines.Add(uri.Host);
+                }
+                else
+                {
+                    hyperLink.Inlines.Add(match.Value);
+                }
+                paragraph.Inlines.Add(hyperLink);
+
+                index = match.Index + match.Length;
+            }
+
+            if (index == 0 || index < stringValue.Length - 1)
+            {
+                var lastRunText = stringValue.Substring(index);
+                if (lastRunText.Length > 0)
+                {
+                    paragraph.Inlines.Add(new Run { Text = lastRunText });
+                }
+            }
+            richTextBox.Blocks.Clear();
+            richTextBox.Blocks.Add(paragraph);
+        }
+    }
+}
-- 
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