Add emoji to a RichTextBlock

When I created the MyTwich app I asked myself:

How to convert a string into a text and/or image stream while maintaining Binding mechanics?

To do that, you need to create a DependencyObject.

 
public class BindingTextFormarterHelper : DependencyObject
    {

        public static string GetText(DependencyObject obj)
        {
            return (string)obj.GetValue(TextProperty);
        }

        public static void SetText(DependencyObject obj, string value)
        {
            obj.SetValue(TextProperty, value);
        }
        public static readonly DependencyProperty TextProperty =
            DependencyProperty.RegisterAttached("Text", typeof(string), typeof(BindingTextFormarterHelper), new PropertyMetadata(String.Empty, OnTextChanged));

        private static void OnTextChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            var control = sender as RichTextBlock;
            if (control != null)
            {
                control.Blocks.Clear();
                if (e.NewValue != null)
                {
                    //Quand le texte change on va créer les blocks.
                    string value = e.NewValue.ToString();
                    control.Blocks.Add(SplitString(value));
                }
            }
        }

        static Paragraph SplitString(string message)
        {
            var ret = new Paragraph();
            //On divise le texte en mots
            var words = message.Split(' ');

            Dictionary<string,string> icons = new Dictionary<string,string>();
            icons.Add(":)","ImagePath1");
            icons.Add(":'(","ImagePath2");

            foreach (var word in words)
            {
                //Si le mots est un des icons on génère le container adequat.
                if(icons.ContainsKey(word))
                {
                   //On récupère le chemin de le chemin du fichier image
                   var iconPath =  icons[word];
                   var container = new InlineUIContainer();
                   container.Child = new Image()
                   {
                       Height = 20,
                       Width = 20,
                       VerticalAlignment = Windows.UI.Xaml.VerticalAlignment.Center,
                       Source = new BitmapImage(new Uri(iconPath))
                   };
                   ret.Inlines.Add(container);
                   break;
                }
                else
                    ret.Inlines.Add(new Run { Text = word + " " });
            }
            return ret;
        }
    }

And this is how we use it in XAML.

 
  <RichTextBlock TextWrapping="WrapWholeWords"
   myTwitch:BindingTextFormarterHelper.Text="{Binding Message}" />
     

Here is how the chat looks with emoji:

Original illustration unavailable: Player interface with the chat underneath