LayoutFarm.Text.TextSurfaceEventListener.IsRegisterPreviewKeyDownChar C# (CSharp) Méthode

        bool IsRegisterPreviewKeyDownChar(char c)
        {
            if (previewKeyDownRegisterChars != null)
            {
                for (int i = previewKeyDownRegisterChars.Length - 1; i > -1; --i)
                {
                    if (previewKeyDownRegisterChars[i] == c)
                    {
                        return true;
                    }
                }
            }
            return false;
        }

 internal static bool NotifyPreviewKeydown(TextSurfaceEventListener listener, char c)
 {
     if (listener.IsRegisterPreviewKeyDownChar(c))
     {
         if (listener.PreviewRegisteredKeyDown != null)
         {
             TextDomEventArgs e = new TextDomEventArgs(c);
             listener.PreviewRegisteredKeyDown(listener, e);
             return(e.PreventDefault);
         }
     }
     return(false);
 }