/WebsitePanel/Branches/SSL Cert Management/Sources/WebsitePanel.WebPortal/Code/Adapters/MenuAdapter.cs

// Material sourced from the bluePortal project (http://blueportal.codeplex.com).

// Licensed under the Microsoft Public License (available at http://www.opensource.org/licenses/ms-pl.html).



using System;

using System.IO;

using System.Web;

using System.Web.Configuration;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;



namespace CSSFriendly

{

    public class MenuAdapter : System.Web.UI.WebControls.Adapters.MenuAdapter

    {

        private WebControlAdapterExtender _extender = null;

        private WebControlAdapterExtender Extender

        {

            get

            {

                if (((_extender == null) && (Control != null)) ||

                    ((_extender != null) && (Control != _extender.AdaptedControl)))

                {

                    _extender = new WebControlAdapterExtender(Control);

                }



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

                return _extender;

            }

        }



        protected override void OnInit(EventArgs e)

        {

            base.OnInit(e);



            if (Extender.AdapterEnabled)

            {

                RegisterScripts();

            }

        }



        private void RegisterScripts()

        {

            Extender.RegisterScripts();

            string folderPath = WebConfigurationManager.AppSettings.Get("CSSFriendly-JavaScript-Path");

            if (String.IsNullOrEmpty(folderPath))

            {

                folderPath = "~/JavaScript";

            }

            string filePath = folderPath.EndsWith("/") ? folderPath + "MenuAdapter.js" : folderPath + "/MenuAdapter.js";

            Page.ClientScript.RegisterClientScriptInclude(GetType(), GetType().ToString(), Page.ResolveUrl(filePath));

        }



        protected override void RenderBeginTag(HtmlTextWriter writer)

        {

            if (Extender.AdapterEnabled)

            {

                Extender.RenderBeginTag(writer, "AspNet-Menu-" + Control.Orientation.ToString());

            }

            else

            {

                base.RenderBeginTag(writer);

            }

        }



        protected override void RenderEndTag(HtmlTextWriter writer)

        {

            if (Extender.AdapterEnabled)

            {

                Extender.RenderEndTag(writer);

            }

            else

            {

                base.RenderEndTag(writer);

            }

        }



        protected override void RenderContents(HtmlTextWriter writer)

        {

            if (Extender.AdapterEnabled)

            {

                writer.Indent++;

                BuildItems(Control.Items, true, writer);

                writer.Indent--;

                writer.WriteLine();

            }

            else

            {

                base.RenderContents(writer);

            }

        }



        private void BuildItems(MenuItemCollection items, bool isRoot, HtmlTextWriter writer)

        {

            if (items.Count > 0)

            {

                writer.WriteLine();



                writer.WriteBeginTag("ul");

                if (isRoot)

                {

                    writer.WriteAttribute("class", "AspNet-Menu");

                    writer.WriteAttribute("id", Control.ClientID);

                }

                writer.Write(HtmlTextWriter.TagRightChar);

                writer.Indent++;

                               

                foreach (MenuItem item in items)

                {

                    BuildItem(item, writer);

                }



                writer.Indent--;

                writer.WriteLine();

                writer.WriteEndTag("ul");

            }

        }



        private void BuildItem(MenuItem item, HtmlTextWriter writer)

        {

            Menu menu = Control as Menu;

            if ((menu != null) && (item != null) && (writer != null))

            {

                writer.WriteLine();

                writer.WriteBeginTag("li");



                string theClass = (item.ChildItems.Count > 0) ? "AspNet-Menu-WithChildren" : "AspNet-Menu-Leaf";

                string selectedStatusClass = GetSelectStatusClass(item);

                if (!String.IsNullOrEmpty(selectedStatusClass))

                {

                    theClass += " " + selectedStatusClass;

                }

                writer.WriteAttribute("class", theClass);



                writer.Write(HtmlTextWriter.TagRightChar);

                writer.Indent++;

                writer.WriteLine();



                if (((item.Depth < menu.StaticDisplayLevels) && (menu.StaticItemTemplate != null)) ||

                    ((item.Depth >= menu.StaticDisplayLevels) && (menu.DynamicItemTemplate != null)))

                {

                    writer.WriteBeginTag("div");

                    writer.WriteAttribute("class", GetItemClass(menu, item));

                    writer.Write(HtmlTextWriter.TagRightChar);

                    writer.Indent++;

                    writer.WriteLine();



                    MenuItemTemplateContainer container = new MenuItemTemplateContainer(menu.Items.IndexOf(item), item);

                    if ((item.Depth < menu.StaticDisplayLevels) && (menu.StaticItemTemplate != null))

                    {

                        menu.StaticItemTemplate.InstantiateIn(container);

                    }

                    else

                    {

                        menu.DynamicItemTemplate.InstantiateIn(container);

                    }

                    container.DataBind();

                    container.RenderControl(writer);



                    writer.Indent--;

                    writer.WriteLine();

                    writer.WriteEndTag("div");

                }

                else

                {

                    if (IsLink(item))

                    {

                        writer.WriteBeginTag("a");

                        if (!String.IsNullOrEmpty(item.NavigateUrl))

                        {

                            writer.WriteAttribute("href", Page.Server.HtmlEncode(menu.ResolveClientUrl(item.NavigateUrl)));

                        }

                        else

                        {

                            writer.WriteAttribute("href", Page.ClientScript.GetPostBackClientHyperlink(menu, "b" +  item.ValuePath.Replace(menu.PathSeparator.ToString(), "\\"), true));

                        }



                        writer.WriteAttribute("class", GetItemClass(menu, item));

                        WebControlAdapterExtender.WriteTargetAttribute(writer, item.Target);



                        if (!String.IsNullOrEmpty(item.ToolTip))

                        {

                            writer.WriteAttribute("title", item.ToolTip);

                        }

                        else if (!String.IsNullOrEmpty(menu.ToolTip))

                        {

                            writer.WriteAttribute("title", menu.ToolTip);

                        }

                        writer.Write(HtmlTextWriter.TagRightChar);

                        writer.Indent++;

                        writer.WriteLine();

                    }

                    else

                    {

                        writer.WriteBeginTag("span");

                        writer.WriteAttribute("class", GetItemClass(menu, item));

                        writer.Write(HtmlTextWriter.TagRightChar);

                        writer.Indent++;

                        writer.WriteLine();

                    }



                    if (!String.IsNullOrEmpty(item.ImageUrl))

                    {

                        writer.WriteBeginTag("img");

                        writer.WriteAttribute("src", menu.ResolveClientUrl(item.ImageUrl));

                        writer.WriteAttribute("alt", !String.IsNullOrEmpty(item.ToolTip) ? item.ToolTip : (!String.IsNullOrEmpty(menu.ToolTip) ? menu.ToolTip : item.Text));

                        writer.Write(HtmlTextWriter.SelfClosingTagEnd);

                    }



                    writer.Write(item.Text);



                    if (IsLink(item))

                    {

                        writer.Indent--;

                        writer.WriteLine();

                        writer.WriteEndTag("a");

                    }

                    else

                    {

                        writer.Indent--;

                        writer.WriteLine();

                        writer.WriteEndTag("span");

                    }



                }



                if ((item.ChildItems != null) && (item.ChildItems.Count > 0))

                {

                    BuildItems(item.ChildItems, false, writer);

                }



                writer.Indent--;

                writer.WriteLine();

                writer.WriteEndTag("li");

            }

        }



        private bool IsLink(MenuItem item)

        {

            return (item != null) && item.Enabled && ((!String.IsNullOrEmpty(item.NavigateUrl)) || item.Selectable);

        }



        private string GetItemClass(Menu menu, MenuItem item)

        {

            string value = "AspNet-Menu-NonLink";

            if (item != null)

            {

                if (((item.Depth < menu.StaticDisplayLevels) && (menu.StaticItemTemplate != null)) ||

                    ((item.Depth >= menu.StaticDisplayLevels) && (menu.DynamicItemTemplate != null)))

                {

                    value = "AspNet-Menu-Template";

                }

                else if (IsLink(item))

                {

                    value =  "AspNet-Menu-Link";

                }

                string selectedStatusClass = GetSelectStatusClass(item);

                if (!String.IsNullOrEmpty(selectedStatusClass))

                {

                    value += " " + selectedStatusClass;

                }

            }

            return value;

        }



        private string GetSelectStatusClass(MenuItem item)

        {

            string value = "";

            if (item.Selected)

            {

                value += " AspNet-Menu-Selected";

            }

            else if (IsChildItemSelected(item))

            {

                value += " AspNet-Menu-ChildSelected";

            }

            else if (IsParentItemSelected(item))

            {

                value += " AspNet-Menu-ParentSelected";

            }

            return value;

        }



        private bool IsChildItemSelected(MenuItem item)

        {

            bool bRet = false;



            if ((item != null) && (item.ChildItems != null))

            {

                bRet = IsChildItemSelected(item.ChildItems);

            }



            return bRet;

        }



        private bool IsChildItemSelected(MenuItemCollection items)

        {

            bool bRet = false;



            if (items != null)

            {

                foreach (MenuItem item in items)

                {

                    if (item.Selected || IsChildItemSelected(item.ChildItems))

                    {

                        bRet = true;

                        break;

                    }

                }

            }



            return bRet;

        }



        private bool IsParentItemSelected(MenuItem item)

        {

            bool bRet = false;



            if ((item != null) && (item.Parent != null))

            {

                if (item.Parent.Selected)

                {

                    bRet = true;

                }

                else

                {

                    bRet = IsParentItemSelected(item.Parent);

                }

            }



            return bRet;

        }

    }

}