//
// System.Web.UI.HtmlControls.HtmlHead
//
// Authors:
// 	Chris Toshok (toshok@ximian.com)
//
// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.ComponentModel;
using System.Collections;
using System.Security.Permissions;
using System.Web.UI.WebControls;

namespace System.Web.UI.HtmlControls
{
	[ControlBuilder (typeof (HtmlEmptyTagControlBuilder))]
	public class HtmlLink: HtmlControl
	{
		public HtmlLink () : base ("link")
		{
		}

		[DefaultValue ("")]
		[UrlProperty]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public virtual string Href {
			get {
				string s = Attributes["href"];
				if (s == null)
					return "";
				return s;
			}
			set {
				if (value == null)
					Attributes.Remove ("href");
				else
					Attributes["href"] = value;
			}
		}

		protected internal override void Render (HtmlTextWriter writer)
		{
			writer.WriteBeginTag (TagName);
			RenderAttributes (writer);
			writer.Write (" />");
		}

		[MonoTODO ("why override?")]
		protected override void RenderAttributes (HtmlTextWriter writer)
		{
			if (Href.Length > 0)
				Href = ResolveClientUrl (Href);
			base.RenderAttributes (writer);
		}
	}
}