/BlogEngine/DotNetSlave.BusinessLogic/Web/Controls/RewriteFormHtmlTextWriter.cs

namespace BlogEngine.Core.Web.Controls

{

    using System.IO;

    using System.Web;

    using System.Web.UI;



    /// <summary>

    /// The RewriteFormHtmlTextWriter class implements Form action tag rewriting for rewritten pages 

    ///     on Mono.

    /// </summary>

    public class RewriteFormHtmlTextWriter : HtmlTextWriter

    {

        #region Constructors and Destructors



        /// <summary>

        /// Initializes a new instance of the <see cref="RewriteFormHtmlTextWriter"/> class.

        /// </summary>

        /// <param name="writer">

        /// The writer.

        /// </param>

        public RewriteFormHtmlTextWriter(Html32TextWriter writer)

            : base(writer)

        {

            this.InnerWriter = writer.InnerWriter;

        }



        /// <summary>

        /// Initializes a new instance of the <see cref="RewriteFormHtmlTextWriter"/> class.

        /// </summary>

        /// <param name="writer">

        /// The writer.

        /// </param>

        public RewriteFormHtmlTextWriter(TextWriter writer)

            : base(writer)

        {

            this.InnerWriter = writer;

        }



        #endregion



        #region Public Methods



        /// <summary>

        /// Writes the specified markup attribute and value to the output stream, and, if specified, writes the value encoded.

        /// </summary>

        /// <param name="name">

        /// The markup attribute to write to the output stream.

        /// </param>

        /// <param name="value">

        /// The value assigned to the attribute.

        /// </param>

        /// <param name="encode">

        /// true to encode the attribute and its assigned value; otherwise, false.

        /// </param>

        public override void WriteAttribute(string name, string value, bool encode)

        {

            // Mono has issues identifying relative paths when the url is rewritten,

            // so we need to place the full path in the form tag's action attribute

            // or postbacks won't work in rewritten pages.

            if (Utils.IsMono)

            {

                if (name == "action")

                {

                    if (HttpContext.Current.Items["ActionAlreadyWritten"] == null)

                    {

                        value = Utils.AbsoluteWebRoot + value;

                        HttpContext.Current.Items["ActionAlreadyWritten"] = true;

                    }

                }

            }

            else

            {

                if (name == "action")

                {

                    if (HttpContext.Current.Items["ActionAlreadyWritten"] == null)

                    {

                        value = HttpContext.Current.Request.RawUrl;

                        HttpContext.Current.Items["ActionAlreadyWritten"] = true;

                    }

                }

            }



            base.WriteAttribute(name, value, encode);

        }



        #endregion

    }

}