//
// ScriptManager.cs
//
// Author:
//   Igor Zelmanovich <igorz@mainsoft.com>
//
// (C) 2007 Mainsoft, Inc.  http://www.mainsoft.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;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Security.Permissions;
using System.Collections.Specialized;
using System.Collections;
using System.Web.Handlers;
using System.Reflection;
using System.Web.Configuration;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Globalization;
using System.Threading;

namespace System.Web.UI
{
	[ParseChildrenAttribute (true)]
	[DefaultPropertyAttribute ("Scripts")]
	[DesignerAttribute ("System.Web.UI.Design.ScriptManagerDesigner, System.Web.Extensions.Design, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
	[NonVisualControlAttribute]
	[PersistChildrenAttribute (false)]
	[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
	[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
	public class ScriptManager : Control, IPostBackDataHandler
	{
		// the keywords are used in fomatting async response
		const string updatePanel = "updatePanel";
		const string hiddenField = "hiddenField";
		const string arrayDeclaration = "arrayDeclaration";
		const string scriptBlock = "scriptBlock";
		const string expando = "expando";
		const string onSubmit = "onSubmit";
		const string asyncPostBackControlIDs = "asyncPostBackControlIDs";
		const string postBackControlIDs = "postBackControlIDs";
		const string updatePanelIDs = "updatePanelIDs";
		const string asyncPostBackTimeout = "asyncPostBackTimeout";
		const string childUpdatePanelIDs = "childUpdatePanelIDs";
		const string panelsToRefreshIDs = "panelsToRefreshIDs";
		const string formAction = "formAction";
		const string dataItem = "dataItem";
		const string dataItemJson = "dataItemJson";
		const string scriptDispose = "scriptDispose";
		const string pageRedirect = "pageRedirect";
		const string error = "error";
		const string pageTitle = "pageTitle";
		const string focus = "focus";
		const string scriptContentNoTags = "ScriptContentNoTags";
		const string scriptContentWithTags = "ScriptContentWithTags";
		const string scriptPath = "ScriptPath";

		int _asyncPostBackTimeout = 90;
		List<Control> _asyncPostBackControls;
		List<Control> _postBackControls;
		List<UpdatePanel> _updatePanels;
		ScriptReferenceCollection _scripts;
		bool _isInAsyncPostBack;
		string _asyncPostBackSourceElementID;
		ScriptMode _scriptMode = ScriptMode.Auto;
		bool _enableScriptGlobalization;
		bool _enableScriptLocalization;
		string _scriptPath;
		ScriptEntry _clientScriptBlocks;
		ScriptEntry _startupScriptBlocks;
		List<ArrayDeclaration> _arrayDeclarations;

		[DefaultValue (true)]
		[Category ("Behavior")]
		public bool AllowCustomErrorsRedirect {
			get {
				throw new NotImplementedException ();
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[Category ("Behavior")]
		[DefaultValue ("")]
		public string AsyncPostBackErrorMessage {
			get {
				throw new NotImplementedException ();
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[Browsable (false)]
		public string AsyncPostBackSourceElementID {
			get {
				if(_asyncPostBackSourceElementID==null)
					return String.Empty;
				return _asyncPostBackSourceElementID;
			}
		}

		[DefaultValue (90)]
		[Category ("Behavior")]
		public int AsyncPostBackTimeout {
			get {
				return _asyncPostBackTimeout;
			}
			set {
				_asyncPostBackTimeout = value;
			}
		}

		[Category ("Behavior")]
		[MergableProperty (false)]
		[DefaultValue ("")]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
		[PersistenceMode (PersistenceMode.InnerProperty)]
		public AuthenticationServiceManager AuthenticationService {
			get {
				throw new NotImplementedException ();
			}
		}

		[Category ("Behavior")]
		[DefaultValue (false)]
		public bool EnablePageMethods {
			get {
				throw new NotImplementedException ();
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[DefaultValue (true)]
		[Category ("Behavior")]
		public bool EnablePartialRendering {
			get {
				throw new NotImplementedException ();
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[DefaultValue (false)]
		[Category ("Behavior")]
		public bool EnableScriptGlobalization {
			get {
				return _enableScriptGlobalization;
			}
			set {
				_enableScriptGlobalization = value;
			}
		}

		[Category ("Behavior")]
		[DefaultValue (false)]
		public bool EnableScriptLocalization {
			get {
				return _enableScriptLocalization;
			}
			set {
				_enableScriptLocalization = value;
			}
		}

		[Browsable (false)]
		public bool IsDebuggingEnabled {
			get {
				if (IsDeploymentRetail)
					return false;

				CompilationSection compilation = (CompilationSection) WebConfigurationManager.GetSection ("system.web/compilation");
				if (!compilation.Debug && (ScriptMode == ScriptMode.Auto || ScriptMode == ScriptMode.Inherit))
					return false;

				if (ScriptMode == ScriptMode.Release)
					return false;

				return true;
			}
		}

		bool IsDeploymentRetail {
			get {
				DeploymentSection deployment = (DeploymentSection) WebConfigurationManager.GetSection ("system.web/deployment");
				return deployment.Retail;
			}
		}

		[Browsable (false)]
		public bool IsInAsyncPostBack {
			get {
				return _isInAsyncPostBack;
			}
		}

		[Category ("Behavior")]
		[DefaultValue (true)]
		public bool LoadScriptsBeforeUI {
			get {
				throw new NotImplementedException ();
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[PersistenceMode (PersistenceMode.InnerProperty)]
		[DefaultValue ("")]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
		[Category ("Behavior")]
		[MergableProperty (false)]
		public ProfileServiceManager ProfileService {
			get {
				throw new NotImplementedException ();
			}
		}

		[Category ("Behavior")]
		public ScriptMode ScriptMode {
			get {
				return _scriptMode;
			}
			set {
				if (value == ScriptMode.Inherit)
					value = ScriptMode.Auto;
				_scriptMode = value;
			}
		}

		[DefaultValue ("")]
		[Category ("Behavior")]
		public string ScriptPath {
			get {
				if (_scriptPath == null)
					return String.Empty;
				return _scriptPath;
			}
			set {
				_scriptPath = value;
			}
		}

		[PersistenceMode (PersistenceMode.InnerProperty)]
		[DefaultValue ("")]
		[Category ("Behavior")]
		[MergableProperty (false)]
		public ScriptReferenceCollection Scripts {
			get {
				if (_scripts == null)
					_scripts = new ScriptReferenceCollection ();

				return _scripts;
			}
		}

		[PersistenceMode (PersistenceMode.InnerProperty)]
		[DefaultValue ("")]
		[MergableProperty (false)]
		[Category ("Behavior")]
		public ServiceReferenceCollection Services {
			get {
				throw new NotImplementedException ();
			}
		}

		[DefaultValue (true)]
		[Browsable (false)]
		public bool SupportsPartialRendering {
			get {
				throw new NotImplementedException ();
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[EditorBrowsable (EditorBrowsableState.Never)]
		[Browsable (false)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public override bool Visible {
			get {
				return true;
			}
			set {
				throw new NotImplementedException ();
			}
		}

		[Category ("Action")]
		public event EventHandler<AsyncPostBackErrorEventArgs> AsyncPostBackError;

		[Category ("Action")]
		public event EventHandler<ScriptReferenceEventArgs> ResolveScriptReference;

		public static ScriptManager GetCurrent (Page page)
		{
			HttpContext ctx = HttpContext.Current;
			if (ctx == null)
				return null;

			return (ScriptManager) ctx.Items [page];
		}
		
		static void SetCurrent (Page page, ScriptManager instance) {
			HttpContext ctx = HttpContext.Current;
			ctx.Items [page] = instance;
		}

		protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
		{
			_isInAsyncPostBack = true;
			string arg = postCollection [postDataKey];
			if (!String.IsNullOrEmpty (arg)) {
				string [] args = arg.Split ('|');
				Control c = Page.FindControl (args [0]);
				UpdatePanel up = c as UpdatePanel;
				if (up != null && up.ChildrenAsTriggers)
					up.Update ();
				_asyncPostBackSourceElementID = args[1];
			}
			return false;
		}

		protected internal virtual void OnAsyncPostBackError (AsyncPostBackErrorEventArgs e)
		{
			if (AsyncPostBackError != null)
				AsyncPostBackError (this, e);
		}

		protected override void OnInit (EventArgs e)
		{
			base.OnInit (e);

			if (GetCurrent (Page) != null)
				throw new InvalidOperationException ("Only one instance of a ScriptManager can be added to the page.");

			SetCurrent (Page, this);
		}

		protected override void OnPreRender (EventArgs e)
		{
			base.OnPreRender (e);

			if (IsInAsyncPostBack) {
				Page.SetRenderMethodDelegate (RenderPageCallback);
			}
			else {
				if (EnableScriptGlobalization) {
					CultureInfo culture = Thread.CurrentThread.CurrentCulture;
					string script = null; // TODO: Json serialization of culture
					RegisterClientScriptBlock (this, typeof (ScriptManager), "ScriptGlobalization", script, true);
				}

				// Register Scripts
				foreach (ScriptReference script in GetScriptReferences ()) {
					OnResolveScriptReference (new ScriptReferenceEventArgs (script));
					RegisterScriptReference (script);
				}

				// Register startup script
				RegisterStartupScript (this, typeof (ScriptManager), "Sys.Application.initialize();", "Sys.Application.initialize();", true);
			}
		}

		IEnumerable GetScriptReferences () {
			ScriptReference script;

			script = new ScriptReference ("MicrosoftAjax.js", String.Empty);
			script.NotifyScriptLoaded = false;
			yield return script;

			script = new ScriptReference ("MicrosoftAjaxWebForms.js", String.Empty);
			script.NotifyScriptLoaded = false;
			yield return script;

			if (_scripts != null && _scripts.Count > 0) {
				for (int i = 0; i < _scripts.Count; i++) {
					yield return _scripts [i];
				}
			}
		}

		protected virtual void OnResolveScriptReference (ScriptReferenceEventArgs e)
		{
			if (ResolveScriptReference != null)
				ResolveScriptReference (this, e);
		}

		protected virtual void RaisePostDataChangedEvent ()
		{
			throw new NotImplementedException ();
		}

		public static void RegisterArrayDeclaration (Control control, string arrayName, string arrayValue)
		{
			RegisterArrayDeclaration (control.Page, arrayName, arrayValue);
		}

		public static void RegisterArrayDeclaration (Page page, string arrayName, string arrayValue)
		{
			ScriptManager sm = GetCurrent (page);
			if (sm.IsInAsyncPostBack)
				sm.RegisterArrayDeclaration (arrayName, arrayValue);
			else
				page.ClientScript.RegisterArrayDeclaration (arrayName, arrayValue);
		}

		void RegisterArrayDeclaration (string arrayName, string arrayValue) {
			if (_arrayDeclarations == null)
				_arrayDeclarations = new List<ArrayDeclaration> ();

			_arrayDeclarations.Add(new ArrayDeclaration(arrayName, arrayValue));
		}

		public void RegisterAsyncPostBackControl (Control control)
		{
			if(control==null)
				return;

			if (_asyncPostBackControls == null)
				_asyncPostBackControls = new List<Control> ();

			if (_asyncPostBackControls.Contains (control))
				return;

			_asyncPostBackControls.Add (control);
		}

		public static void RegisterClientScriptBlock (Control control, Type type, string key, string script, bool addScriptTags)
		{
			RegisterClientScriptBlock (control.Page, type, key, script, addScriptTags);
		}

		public static void RegisterClientScriptBlock (Page page, Type type, string key, string script, bool addScriptTags)
		{
			ScriptManager sm = GetCurrent (page);
			if (sm.IsInAsyncPostBack)
				RegisterScript (ref sm._clientScriptBlocks, type, key, script, addScriptTags ? ScriptEntryType.ScriptContentNoTags : ScriptEntryType.ScriptContentWithTags);
			else
				page.ClientScript.RegisterClientScriptBlock (type, key, script, addScriptTags);
		}

		public static void RegisterClientScriptInclude (Control control, Type type, string key, string url)
		{
			RegisterClientScriptInclude (control.Page, type, key, url);
		}

		public static void RegisterClientScriptInclude (Page page, Type type, string key, string url)
		{
			ScriptManager sm = GetCurrent (page);
			if (sm.IsInAsyncPostBack)
				RegisterScript (ref sm._clientScriptBlocks, type, key, url, ScriptEntryType.ScriptPath);
			else
				page.ClientScript.RegisterClientScriptInclude (type, key, url);
		}

		public static void RegisterClientScriptResource (Control control, Type type, string resourceName)
		{
			RegisterClientScriptResource (control.Page, type, resourceName);
		}

		public static void RegisterClientScriptResource (Page page, Type type, string resourceName)
		{
			RegisterClientScriptInclude (page, type, "resource-" + resourceName, ScriptResourceHandler.GetResourceUrl (type, resourceName));
		}

		void RegisterScriptReference (ScriptReference script) {
			
			bool isDebugMode = IsDeploymentRetail ? false : (script.ScriptModeInternal == ScriptMode.Inherit ? IsDebuggingEnabled : (script.ScriptModeInternal == ScriptMode.Debug));
			string url;
			if (!String.IsNullOrEmpty (script.Path)) {
				url = GetScriptName (ResolveClientUrl (script.Path), isDebugMode, EnableScriptLocalization ? script.ResourceUICultures : null);
			}
			else if (!String.IsNullOrEmpty (script.Name)) {
				Assembly assembly;
				if (String.IsNullOrEmpty (script.Assembly))
					assembly = typeof (ScriptManager).Assembly;
				else
					assembly = Assembly.Load (script.Assembly);
				string name = GetScriptName (script.Name, isDebugMode, null);
				if (script.IgnoreScriptPath || String.IsNullOrEmpty (ScriptPath))
					url = ScriptResourceHandler.GetResourceUrl (assembly, name, script.NotifyScriptLoaded);
				else {
					AssemblyName an = assembly.GetName ();
					url = ResolveClientUrl (String.Concat (VirtualPathUtility.AppendTrailingSlash (ScriptPath), an.Name, '/', an.Version, '/', name));
				}
			}
			else {
				throw new InvalidOperationException ("Name and Path cannot both be empty.");
			}

			RegisterClientScriptInclude (this, typeof (ScriptManager), url, url);
		}

		static string GetScriptName (string releaseName, bool isDebugMode, string [] supportedUICultures) {
			if (!isDebugMode && (supportedUICultures == null || supportedUICultures.Length == 0))
				return releaseName;

			if (releaseName.Length < 3 || !releaseName.EndsWith (".js", StringComparison.OrdinalIgnoreCase))
				throw new InvalidOperationException (String.Format ("'{0}' is not a valid script path.  The path must end in '.js'.", releaseName));

			StringBuilder sb = new StringBuilder (releaseName);
			sb.Length -= 3;
			if (isDebugMode)
				sb.Append (".debug");
			string culture=Thread.CurrentThread.CurrentUICulture.Name;
			if (supportedUICultures != null && Array.IndexOf<string> (supportedUICultures, culture) >= 0)
				sb.AppendFormat (".{0}", culture);
			sb.Append (".js");

			return sb.ToString ();
		}

		public void RegisterDataItem (Control control, string dataItem)
		{
			throw new NotImplementedException ();
		}

		public void RegisterDataItem (Control control, string dataItem, bool isJsonSerialized)
		{
			throw new NotImplementedException ();
		}

		public void RegisterDispose (Control control, string disposeScript)
		{
			throw new NotImplementedException ();
		}

		public static void RegisterExpandoAttribute (Control control, string controlId, string attributeName, string attributeValue, bool encode)
		{
			throw new NotImplementedException ();
		}

		public static void RegisterHiddenField (Control control, string hiddenFieldName, string hiddenFieldInitialValue)
		{
			throw new NotImplementedException ();
		}

		public static void RegisterHiddenField (Page page, string hiddenFieldName, string hiddenFieldInitialValue)
		{
			throw new NotImplementedException ();
		}

		public static void RegisterOnSubmitStatement (Control control, Type type, string key, string script)
		{
			throw new NotImplementedException ();
		}

		public static void RegisterOnSubmitStatement (Page page, Type type, string key, string script)
		{
			throw new NotImplementedException ();
		}

		public void RegisterPostBackControl (Control control)
		{
			if (control == null)
				return;

			if (_postBackControls == null)
				_postBackControls = new List<Control> ();

			if (_postBackControls.Contains (control))
				return;

			_postBackControls.Add (control);
		}

		internal void RegisterUpdatePanel (UpdatePanel updatePanel) {
			if (_updatePanels == null)
				_updatePanels = new List<UpdatePanel> ();

			if (_updatePanels.Contains (updatePanel))
				return;

			_updatePanels.Add (updatePanel);
		}

		public void RegisterScriptDescriptors (IExtenderControl extenderControl)
		{
			throw new NotImplementedException ();
		}

		public void RegisterScriptDescriptors (IScriptControl scriptControl)
		{
			throw new NotImplementedException ();
		}

		public static void RegisterStartupScript (Control control, Type type, string key, string script, bool addScriptTags)
		{
			RegisterStartupScript (control.Page, type, key, script, addScriptTags);
		}

		public static void RegisterStartupScript (Page page, Type type, string key, string script, bool addScriptTags)
		{
			ScriptManager sm = GetCurrent (page);
			if (sm.IsInAsyncPostBack)
				RegisterScript (ref sm._startupScriptBlocks, type, key, script, addScriptTags ? ScriptEntryType.ScriptContentNoTags : ScriptEntryType.ScriptContentWithTags);
			else
				page.ClientScript.RegisterStartupScript (type, key, script, addScriptTags);
		}

		static void RegisterScript (ref ScriptEntry scriptList, Type type, string key, string script, ScriptEntryType scriptEntryType) {
			ScriptEntry last = null;
			ScriptEntry entry = scriptList;

			while (entry != null) {
				if (entry.Type == type && entry.Key == key)
					return;
				last = entry;
				entry = entry.Next;
			}

			entry = new ScriptEntry (type, key, script, scriptEntryType);

			if (last != null)
				last.Next = entry;
			else
				scriptList = entry;
		}

		protected override void Render (HtmlTextWriter writer)
		{
			// MSDN: This method is used by control developers to extend the ScriptManager control. 
			// Notes to Inheritors: 
			// When overriding this method, call the base Render(HtmlTextWriter) method 
			// so that PageRequestManager is rendered on the page.
			writer.WriteLine ("<script type=\"text/javascript\">");
			writer.WriteLine ("//<![CDATA[");
			writer.WriteLine ("Sys.WebForms.PageRequestManager._initialize('{0}', document.getElementById('{1}'));", UniqueID, Page.Form.ClientID);
			writer.WriteLine ("Sys.WebForms.PageRequestManager.getInstance()._updateControls([{0}], [{1}], [{2}], {3});", FormatUpdatePanelIDs (_updatePanels, true), FormatListIDs (_asyncPostBackControls, true), FormatListIDs (_postBackControls, true), AsyncPostBackTimeout);
			writer.WriteLine ("//]]");
			writer.WriteLine ("</script>");
			base.Render (writer);
		}

		static string FormatUpdatePanelIDs (List<UpdatePanel> list, bool useSingleQuote) {
			if (list == null || list.Count == 0)
				return null;

			StringBuilder sb = new StringBuilder ();
			for (int i = 0; i < list.Count; i++) {
				sb.AppendFormat ("{0}{1}{2}{0},", useSingleQuote ? "'" : String.Empty, list [i].ChildrenAsTriggers ? "t" : "f", list [i].UniqueID);
			}
			if (sb.Length > 0)
				sb.Length--;

			return sb.ToString ();
		}

		static string FormatListIDs (List<Control> list, bool useSingleQuote)
		{
			if (list == null || list.Count == 0)
				return null;

			StringBuilder sb = new StringBuilder ();
			for (int i = 0; i < list.Count; i++) {
				sb.AppendFormat ("{0}{1}{0},", useSingleQuote ? "'" : String.Empty, list [i].UniqueID);
			}
			if (sb.Length > 0)
				sb.Length--;

			return sb.ToString ();
		}

		public void SetFocus (Control control)
		{
			throw new NotImplementedException ();
		}

		public void SetFocus (string clientID)
		{
			throw new NotImplementedException ();
		}

		#region IPostBackDataHandler Members

		bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
		{
			return LoadPostData (postDataKey, postCollection);
		}

		void IPostBackDataHandler.RaisePostDataChangedEvent ()
		{
			RaisePostDataChangedEvent ();
		}

		#endregion

		static internal void WriteCallbackException (TextWriter output, Exception ex) {
			HttpException httpEx = ex as HttpException;
			WriteCallbackOutput (output, error, httpEx == null ? "500" : httpEx.GetHttpCode ().ToString (), ex.GetBaseException ().Message);
		}

		static internal void WriteCallbackRedirect (TextWriter output, string redirectUrl) {
			WriteCallbackOutput (output, pageRedirect, null, redirectUrl);
		}

		static void WriteCallbackOutput (TextWriter output, string type, string name, string value) {
			output.Write ("{0}|{1}|{2}|{3}|", value == null ? 0 : value.Length, type, name, value);
		}

		void RenderPageCallback (HtmlTextWriter output, Control container) {
			Page page = (Page) container;

			page.Form.SetRenderMethodDelegate (RenderFormCallback);
			HtmlTextParser parser = new HtmlTextParser (output);
			page.Form.RenderControl (parser);

			parser.WriteOutput (output);
			WriteCallbackOutput (output, asyncPostBackControlIDs, null, FormatListIDs (_asyncPostBackControls, false));
			WriteCallbackOutput (output, postBackControlIDs, null, FormatListIDs (_postBackControls, false));
			WriteCallbackOutput (output, updatePanelIDs, null, FormatUpdatePanelIDs (_updatePanels, false));
			WriteCallbackOutput (output, asyncPostBackTimeout, null, AsyncPostBackTimeout.ToString ());
			WriteCallbackOutput (output, pageTitle, null, Page.Title);

			WriteArrayDeclarations (output);
			WriteScriptBlocks (output, _clientScriptBlocks);
			WriteScriptBlocks (output, _startupScriptBlocks);
		}

		void WriteArrayDeclarations (HtmlTextWriter writer) {
			if (_arrayDeclarations != null) {
				for (int i = 0; i < _arrayDeclarations.Count; i++) {
					ArrayDeclaration array = _arrayDeclarations [i];
					WriteCallbackOutput (writer, arrayDeclaration, array.ArrayName, array.ArrayValue);
				}
			}
		}

		void WriteScriptBlocks (HtmlTextWriter output, ScriptEntry scriptList) {
			while (scriptList != null) {
				switch (scriptList.ScriptEntryType) {
				case ScriptEntryType.ScriptContentNoTags:
					WriteCallbackOutput (output, scriptBlock, scriptContentNoTags, scriptList.Script);
					break;
				case ScriptEntryType.ScriptContentWithTags:
					string script = SerializeScriptBlock (scriptList);
					WriteCallbackOutput (output, scriptBlock, scriptContentWithTags, script);
					break;
				case ScriptEntryType.ScriptPath:
					WriteCallbackOutput (output, scriptBlock, scriptPath, scriptList.Script);
					break;
				}
				scriptList = scriptList.Next;
			}
		}

		[MonoTODO()]
		static string SerializeScriptBlock (ScriptEntry scriptList) {
			throw new InvalidOperationException (String.Format ("The script tag registered for type '{0}' and key '{1}' has invalid characters outside of the script tags: {2}. Only properly formatted script tags can be registered.", scriptList.Type, scriptList.Key, scriptList.Script));
		}

		void RenderFormCallback (HtmlTextWriter output, Control container) {
			output = ((HtmlTextParser) output).ResponseOutput;
			if (_updatePanels != null && _updatePanels.Count > 0) {
				StringBuilder sb = new StringBuilder ();
				HtmlTextWriter w = new HtmlTextWriter (new StringWriter (sb));
				for (int i = 0; i < _updatePanels.Count; i++) {
					UpdatePanel panel = _updatePanels [i];
					if (panel.Visible) {
						panel.RenderChildrenInternal (w);
						w.Flush ();
						if (panel.RequiresUpdate) {
							string panelOutput = sb.ToString ();
							WriteCallbackOutput (output, updatePanel, panel.ClientID, panelOutput);
						}
						sb.Length = 0;
					}
				}
			}
			
			HtmlForm form = (HtmlForm) container;
			HtmlTextWriter writer = new HtmlTextWriter (new DropWriter ());
			if (form.HasControls ()) {
				for (int i = 0; i < form.Controls.Count; i++) {
					form.Controls [i].RenderControl (writer);
				}
			}
		}

		sealed class HtmlTextParser : HtmlTextWriter
		{
			readonly HtmlTextWriter _responseOutput;

			public HtmlTextWriter ResponseOutput {
				get { return _responseOutput; }
			}

			public HtmlTextParser (HtmlTextWriter responseOutput)
				: base (new TextParser ()) {
				_responseOutput = responseOutput;
			}

			public void WriteOutput (HtmlTextWriter output) {
				((TextParser) InnerWriter).WriteOutput (output);
			}
		}

		sealed class TextParser : TextWriter
		{
			int _state;
			char _charState = (char) 255;
			const char nullCharState = (char) 255;
			StringBuilder _sb = new StringBuilder ();
			List<Hashtable> _hiddenFields;
			Hashtable _currentField;
			string _currentAttribute;

			public override Encoding Encoding {
				get { return Encoding.UTF8; }
			}

			public override void Write (char value) {
				switch (_state) {
				case 0:
					ParseBeginTag (value);
					break;
				case 1:
					ParseAttributeName (value);
					break;
				case 2:
					ParseAttributeValue (value);
					break;
				}
			}

			private void ParseAttributeValue (char value) {
				switch (value) {
				case '>':
					ResetState ();
					break;
				case '"':
					_currentField [_currentAttribute] = _sb.ToString ();
					_state = 1;
					_sb.Length = 0;
					break;
				default:
					_sb.Append (value);
					break;
				}
			}

			private void ParseAttributeName (char value) {
				switch (value) {
				case '>':
					ResetState ();
					break;
				case ' ':
				case '=':
					break;
				case '"':
					_currentAttribute = _sb.ToString ();
					_state = 2;
					_sb.Length = 0;
					break;
				default:
					_sb.Append (value);
					break;
				}
			}

			void ParseBeginTag (char value) {
				switch (_charState) {
				case nullCharState:
					if (value == '<')
						_charState = value;
					break;
				case '<':
					if (value == 'i')
						_charState = value;
					else
						ResetState ();
					break;
				case 'i':
					if (value == 'n')
						_charState = value;
					else
						ResetState ();
					break;
				case 'n':
					if (value == 'p')
						_charState = value;
					else
						ResetState ();
					break;
				case 'p':
					if (value == 'u')
						_charState = value;
					else
						ResetState ();
					break;
				case 'u':
					if (value == 't')
						_charState = value;
					else
						ResetState ();
					break;
				case 't':
					if (value == ' ') {
						_state = 1;
						_currentField = new Hashtable ();
						if (_hiddenFields == null)
							_hiddenFields = new List<Hashtable> ();
						_hiddenFields.Add (_currentField);
					}
					else
						ResetState ();
					break;
				}
			}

			private void ResetState () {
				_charState = nullCharState;
				_state = 0;
				_sb.Length = 0;
			}

			public void WriteOutput (HtmlTextWriter output) {
				if (_hiddenFields == null)
					return;
				
				for (int i = 0; i < _hiddenFields.Count; i++) {
					Hashtable field = _hiddenFields [i];
					
					string value = (string) field ["value"];
					if (String.IsNullOrEmpty (value))
						continue;

					ScriptManager.WriteCallbackOutput (output, ScriptManager.hiddenField, (string) field ["name"], value);
				}
			}
		}

		sealed class DropWriter : TextWriter
		{
			public override Encoding Encoding {
				get { return Encoding.UTF8; }
			}
		}

		sealed class ScriptEntry
		{
			readonly public Type Type;
			readonly public string Key;
			readonly public string Script;
			readonly public ScriptEntryType ScriptEntryType;
			public ScriptEntry Next;

			public ScriptEntry (Type type, string key, string script, ScriptEntryType scriptEntryType) {
				Key = key;
				Type = type;
				Script = script;
				ScriptEntryType = scriptEntryType;
			}
		}

		enum ScriptEntryType
		{
			ScriptContentNoTags,
			ScriptContentWithTags,
			ScriptPath
		}

		sealed class ArrayDeclaration
		{
			readonly public string ArrayName;
			readonly public string ArrayValue;

			public ArrayDeclaration (string arrayName, string arrayValue) {
				ArrayName = arrayName;
				ArrayValue = arrayValue;
			}
		}
	}
}