Spark Optional Attributes

BindingExtensions.cs

    public static class BindingExtensions
    {
        public static HtmlTag Data(this HtmlTag html, Dictionary<string, object> dataattrs) 
        {
            foreach (var item in dataattrs)
            {
                html.Data(item.Key, item.Value);
            }
            return html;
        }

        public static HtmlTag Attr(this HtmlTag html, Dictionary<string, object> attrs)
        {
            foreach (var item in attrs)
            {
                html.Attr(item.Key, item.Value);
            }
            return html;
        }

        public static HtmlTag SetStyle(this HtmlTag html, string styles)
        {
            if (string.IsNullOrEmpty((styles ?? "").Trim()))
                return html;

            var stylesArr = styles.Split(';');
            foreach (var style in stylesArr)
            {
                var parts = style.Split(':');
                if (parts.Length < 2)
                    continue;

                html.Style(parts[0], parts[1]);
            }

            return html;
        }
    }

bindings.xml

<?xml version="1.0" encoding="utf-8" ?>
<bindings>  
  <element name="input">
    Html.Input(x=>x.@For)
      .Data(new Dictionary[[string,object]]{{"@data-*"}})
      .Attr(new Dictionary[[string,object]]{{"@*"}})
      .SetStyle("@@style")
      .AddClass("@@class")
  </element>
</bindings>

generic example

<?xml version="1.0" encoding="utf-8" ?>
<bindings>  
  <element name="todo">
    Html.Todo("@item", "@@extra")
  </element>
</bindings>

public static class Extension {
  public static HtmlString Todo(this HtmlHelper html, string item, string extra) {
    string str = string.Format("<li>{0}{1}</li>", 
       html.Encode(item), (string.IsNullOrEmpty(msg) ? "" : " - " + html.Encode(extra)));
    return MvcHtmlString.Create(str);
  }
}

<todo item="this is the item"/>   renders    <li>this is the item</li>
<todo item="this is the item" extra="do it soon"/>   renders    <li>this is the item - do it soon</li>

index.spark

//These attributes will add to the ones that have already been applied by HTML conventions

<input For="Name" class="todo" style="border:1px solid blue;color:green" data-time="23423425522" />

// Is equivalent to

${Html.Input(x=>x.Name)
    .AddClass("todo")
    .Style("border","1px solid blue")
    .Style("color","green")
    .Data("time","23423425522")}