/WebSites/Appleseed/CSSFriendly/Adapters/DataListAdapter.cs

// --------------------------------------------------------------------------------------------------------------------

// <copyright file="DataListAdapter.cs" company="--">

//   Copyright Š -- 2011. All Rights Reserved.

// </copyright>

// <summary>

//   The data list adapter.

// </summary>

// --------------------------------------------------------------------------------------------------------------------



namespace CSSFriendly

{

    using System;

    using System.Diagnostics;

    using System.Web.UI;

    using System.Web.UI.WebControls;

    using System.Web.UI.WebControls.Adapters;



    /// <summary>

    /// The data list adapter.

    /// </summary>

    /// <remarks>

    /// </remarks>

    public class DataListAdapter : WebControlAdapter

    {

        #region Constants and Fields



        /// <summary>

        /// The extender.

        /// </summary>

        private WebControlAdapterExtender extender;



        #endregion



        #region Properties



        /// <summary>

        ///   Gets the extender.

        /// </summary>

        /// <remarks>

        /// </remarks>

        private WebControlAdapterExtender Extender

        {

            get

            {

                if (((this.extender == null) && (this.Control != null)) ||

                    ((this.extender != null) && (this.Control != this.extender.AdaptedControl)))

                {

                    this.extender = new WebControlAdapterExtender(this.Control);

                }



                Debug.Assert(this.extender != null, "CSS Friendly adapters internal error", "Null extender instance");

                return this.extender;

            }

        }



        /// <summary>

        ///   Gets the repeat columns.

        /// </summary>

        /// <remarks>

        /// </remarks>

        private int RepeatColumns

        {

            get

            {

                var dataList = this.Control as DataList;

                var nRet = 1;

                if (dataList != null)

                {

                    if (dataList.RepeatColumns == 0)

                    {

                        if (dataList.RepeatDirection == RepeatDirection.Horizontal)

                        {

                            nRet = dataList.Items.Count;

                        }

                    }

                    else

                    {

                        nRet = dataList.RepeatColumns;

                    }

                }



                return nRet;

            }

        }



        #endregion



        #region Methods



        /// <summary>

        /// Overrides the <see cref="M:System.Web.UI.Control.OnInit(System.EventArgs)"/> method for the associated control.

        /// </summary>

        /// <param name="e">

        /// An <see cref="T:System.EventArgs"/> that contains the event data.

        /// </param>

        /// /

        /// PROTECTED

        /// <remarks>

        /// </remarks>

        protected override void OnInit(EventArgs e)

        {

            base.OnInit(e);



            if (this.Extender.AdapterEnabled)

            {

                RegisterScripts();

            }

        }



        /// <summary>

        /// Creates the beginning tag for the Web control in the markup that is transmitted to the target browser.

        /// </summary>

        /// <param name="writer">

        /// The <see cref="T:System.Web.UI.HtmlTextWriter"/> containing methods to render the target-specific output.

        /// </param>

        /// <remarks>

        /// </remarks>

        protected override void RenderBeginTag(HtmlTextWriter writer)

        {

            if (this.Extender.AdapterEnabled)

            {

                this.Extender.RenderBeginTag(writer, "AspNet-DataList");

            }

            else

            {

                base.RenderBeginTag(writer);

            }

        }



        /// <summary>

        /// Generates the target-specific inner markup for the Web control to which the control adapter is attached.

        /// </summary>

        /// <param name="writer">

        /// The <see cref="T:System.Web.UI.HtmlTextWriter"/> containing methods to render the target-specific output.

        /// </param>

        /// <remarks>

        /// </remarks>

        protected override void RenderContents(HtmlTextWriter writer)

        {

            if (this.Extender.AdapterEnabled)

            {

                var dataList = this.Control as DataList;

                if (dataList != null)

                {

                    writer.Indent++;

                    writer.WriteLine();

                    writer.WriteBeginTag("table");

                    writer.WriteAttribute("cellpadding", "0");

                    writer.WriteAttribute("cellspacing", "0");

                    writer.WriteAttribute("summary", this.Control.ToolTip);

                    writer.Write(HtmlTextWriter.TagRightChar);

                    writer.Indent++;



                    if (dataList.HeaderTemplate != null)

                    {

                        var container = new PlaceHolder();

                        dataList.HeaderTemplate.InstantiateIn(container);

                        container.DataBind();



                        if ((container.Controls.Count == 1) &&

                            typeof(LiteralControl).IsInstanceOfType(container.Controls[0]))

                        {

                            writer.WriteLine();

                            writer.WriteBeginTag("caption");

                            writer.Write(HtmlTextWriter.TagRightChar);



                            var literalControl = container.Controls[0] as LiteralControl;

                            if (literalControl != null)

                            {

                                writer.Write(literalControl.Text.Trim());

                            }



                            writer.WriteEndTag("caption");

                        }

                        else

                        {

                            writer.WriteLine();

                            writer.WriteBeginTag("thead");

                            writer.Write(HtmlTextWriter.TagRightChar);

                            writer.Indent++;



                            writer.WriteLine();

                            writer.WriteBeginTag("tr");

                            writer.Write(HtmlTextWriter.TagRightChar);

                            writer.Indent++;



                            writer.WriteLine();

                            writer.WriteBeginTag("th");

                            writer.WriteAttribute("colspan", this.RepeatColumns.ToString());

                            writer.Write(HtmlTextWriter.TagRightChar);

                            writer.Indent++;



                            writer.WriteLine();

                            container.RenderControl(writer);



                            writer.Indent--;

                            writer.WriteLine();

                            writer.WriteEndTag("th");



                            writer.Indent--;

                            writer.WriteLine();

                            writer.WriteEndTag("tr");



                            writer.Indent--;

                            writer.WriteLine();

                            writer.WriteEndTag("thead");

                        }

                    }



                    if (dataList.FooterTemplate != null)

                    {

                        writer.WriteLine();

                        writer.WriteBeginTag("tfoot");

                        writer.Write(HtmlTextWriter.TagRightChar);

                        writer.Indent++;



                        writer.WriteLine();

                        writer.WriteBeginTag("tr");

                        writer.Write(HtmlTextWriter.TagRightChar);

                        writer.Indent++;



                        writer.WriteLine();

                        writer.WriteBeginTag("td");

                        writer.WriteAttribute("colspan", this.RepeatColumns.ToString());

                        writer.Write(HtmlTextWriter.TagRightChar);

                        writer.Indent++;



                        var container = new PlaceHolder();

                        dataList.FooterTemplate.InstantiateIn(container);

                        container.DataBind();

                        container.RenderControl(writer);



                        writer.Indent--;

                        writer.WriteLine();

                        writer.WriteEndTag("td");



                        writer.Indent--;

                        writer.WriteLine();

                        writer.WriteEndTag("tr");



                        writer.Indent--;

                        writer.WriteLine();

                        writer.WriteEndTag("tfoot");

                    }



                    if (dataList.ItemTemplate != null)

                    {

                        writer.WriteLine();

                        writer.WriteBeginTag("tbody");

                        writer.Write(HtmlTextWriter.TagRightChar);

                        writer.Indent++;



                        var nItemsInColumn = (int)Math.Ceiling(dataList.Items.Count / ((Double)this.RepeatColumns));

                        for (var iItem = 0; iItem < dataList.Items.Count; iItem++)

                        {

                            var nRow = iItem / this.RepeatColumns;

                            var nCol = iItem % this.RepeatColumns;

                            var nDesiredIndex = iItem;

                            if (dataList.RepeatDirection == RepeatDirection.Vertical)

                            {

                                nDesiredIndex = (nCol * nItemsInColumn) + nRow;

                            }



                            if ((iItem % this.RepeatColumns) == 0)

                            {

                                writer.WriteLine();

                                writer.WriteBeginTag("tr");

                                writer.Write(HtmlTextWriter.TagRightChar);

                                writer.Indent++;

                            }



                            writer.WriteLine();

                            writer.WriteBeginTag("td");

                            writer.Write(HtmlTextWriter.TagRightChar);

                            writer.Indent++;



                            foreach (Control itemCtrl in dataList.Items[iItem].Controls)

                            {

                                itemCtrl.RenderControl(writer);

                            }



                            writer.Indent--;

                            writer.WriteLine();

                            writer.WriteEndTag("td");



                            if (((iItem + 1) % this.RepeatColumns) == 0)

                            {

                                writer.Indent--;

                                writer.WriteLine();

                                writer.WriteEndTag("tr");

                            }

                        }



                        if ((dataList.Items.Count % this.RepeatColumns) != 0)

                        {

                            writer.Indent--;

                            writer.WriteLine();

                            writer.WriteEndTag("tr");

                        }



                        writer.Indent--;

                        writer.WriteLine();

                        writer.WriteEndTag("tbody");

                    }



                    writer.Indent--;

                    writer.WriteLine();

                    writer.WriteEndTag("table");



                    writer.Indent--;

                    writer.WriteLine();

                }

            }

            else

            {

                base.RenderContents(writer);

            }

        }



        /// <summary>

        /// Creates the ending tag for the Web control in the markup that is transmitted to the target browser.

        /// </summary>

        /// <param name="writer">

        /// The <see cref="T:System.Web.UI.HtmlTextWriter"/> containing methods to render the target-specific output.

        /// </param>

        /// <remarks>

        /// </remarks>

        protected override void RenderEndTag(HtmlTextWriter writer)

        {

            if (this.Extender.AdapterEnabled)

            {

                this.Extender.RenderEndTag(writer);

            }

            else

            {

                base.RenderEndTag(writer);

            }

        }



        /// <summary>

        /// Registers the scripts.

        /// </summary>

        /// /

        /// PRIVATE

        /// <remarks>

        /// </remarks>

        private static void RegisterScripts()

        {

        }



        #endregion

    }

}