//
// System.Web.UI.WebControls.RadioButtonList.cs
//
// Authors:
//    Jordi Mas i Hernandez (jordi@ximian.com)
//
// (C) 2005 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.Collections;
using System.ComponentModel;
using System.Collections.Specialized;
using System.Security.Permissions;

namespace System.Web.UI.WebControls {

	// CAS
	[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
	[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
	// attributes
	[ValidationProperty ("SelectedItem")]
	[SupportsEventValidation]
	public class RadioButtonList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler
	{
		short tabIndex = 0;

		public RadioButtonList ()
		{

		}

		[DefaultValue (-1)]
		[WebSysDescription ("")]
		[WebCategory ("Layout")]
		public virtual int CellPadding {
			get {
				if (ControlStyleCreated == false)
					return -1; // default value

				return ((TableStyle) ControlStyle).CellPadding;
			}

			set {
				((TableStyle) ControlStyle).CellPadding = value;
			}
		}

		[DefaultValue (-1)]
		[WebSysDescription ("")]
		[WebCategory ("Layout")]
		public virtual int CellSpacing {
			get {
				if (ControlStyleCreated == false)
					return -1; // default value

				return ((TableStyle) ControlStyle).CellSpacing;
			}

			set {
				((TableStyle) ControlStyle).CellSpacing = value;
			}
		}

		[DefaultValue (0)]
		[WebSysDescription ("")]
		[WebCategory ("Layout")]
		public virtual int RepeatColumns  {
			get {
				return ViewState.GetInt ("RepeatColumns", 0);
			}

			set {
				if (value < 0)
					throw new ArgumentOutOfRangeException ("The number of columns is set to a negative value.");

				ViewState ["RepeatColumns"] = value;
			}
		}

		[DefaultValue (RepeatDirection.Vertical)]
		[WebSysDescription ("")]
		[WebCategory ("Layout")]
		public virtual RepeatDirection RepeatDirection {
			get {
				return (RepeatDirection) ViewState.GetInt ("RepeatDirection", (int) RepeatDirection.Vertical);
			}

			set {
				if (value != RepeatDirection.Horizontal && value != RepeatDirection.Vertical)
					throw new ArgumentOutOfRangeException ("he display direction of the list is not one of the RepeatDirection values.");

				ViewState ["RepeatDirection"] = value;
			}
		}

		[DefaultValue (RepeatLayout.Table)]
		[WebSysDescription ("")]
		[WebCategory ("Layout")]
		public virtual RepeatLayout RepeatLayout {
			get {
				return (RepeatLayout) ViewState.GetInt ("RepeatLayout", (int) RepeatLayout.Table);
			}

			set {
				bool outOfRange;
				outOfRange = value < RepeatLayout.Table || value > RepeatLayout.OrderedList;
				if (outOfRange)
					throw new ArgumentOutOfRangeException ("The radio buttons layout is not one of the RepeatLayout values.");

				ViewState ["RepeatLayout"] = value;
			}
		}

		[DefaultValue (TextAlign.Right)]
		[WebSysDescription ("")]
		[WebCategory ("Appearance")]
		public virtual TextAlign TextAlign {
			get {
				return (TextAlign )ViewState.GetInt ("TextAlign", (int) TextAlign.Right);
			}

			set {
				if (value != TextAlign.Left && value != TextAlign.Right)
					throw new ArgumentOutOfRangeException ("The label text alignment associated with the radio buttons is not one of the TextAlign values.");

				ViewState ["TextAlign"] = value;
			}
		}

		// Interface properties

		protected virtual bool HasFooter {
			get { return false; }
		}

		protected virtual bool HasHeader {
			get { return false; }
		}

		protected virtual bool HasSeparators {
			get { return false; }
		}

		protected virtual int RepeatedItemCount {
			get { return Items.Count; }
		}
		
		bool IRepeatInfoUser.HasFooter {
			get { return HasFooter; }
		}

		bool IRepeatInfoUser.HasHeader {
			get { return HasHeader; }
		}

		bool IRepeatInfoUser.HasSeparators {
			get { return HasSeparators; }
		}

		int IRepeatInfoUser.RepeatedItemCount {
			get { return RepeatedItemCount; }
		}

		protected override Style CreateControlStyle ()
		{
			return new TableStyle (ViewState);
		}

		// MSDN: Searches the current naming container for a server control 
		// with the specified ID and path offset. The FindControl method 
		// always returns the RadioButtonList object. 
		protected override Control FindControl (string id, int pathOffset)
		{
			return this;
		}

		protected virtual Style GetItemStyle (ListItemType itemType, int repeatIndex)
		{
			return null;
		}

		protected virtual void RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
		{
			ListItem item = Items [repeatIndex];

			RadioButton radio = new RadioButton ();
			radio.Text = item.Text;
			radio.ID = ClientID + "_"  + repeatIndex;
			radio.TextAlign = TextAlign;
			radio.GroupName = UniqueID;
			radio.Page = Page;
			radio.Checked = item.Selected;
			radio.ValueAttribute = item.Value;
			radio.AutoPostBack = AutoPostBack;
			radio.Enabled = IsEnabled;
			radio.TabIndex = tabIndex;
			radio.ValidationGroup = ValidationGroup;
			radio.CausesValidation = CausesValidation;
			if (radio.HasAttributes)
				radio.Attributes.Clear ();
			if (item.HasAttributes)
				radio.Attributes.CopyFrom (item.Attributes);

			radio.RenderControl (writer);
		}

		protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
		{
			EnsureDataBound ();
			string val = postCollection [postDataKey];
			ListItemCollection items = Items;
			int end = items.Count;
			int selected = SelectedIndex;
			for (int i = 0; i < end; i++) {
				ListItem item = items [i];
				if (item == null || val != item.Value)
					continue;

				if (i != selected) {
					SelectedIndex = i;
					return true;
				}
			}

			return false;
		}

		protected virtual void RaisePostDataChangedEvent ()
		{
			ValidateEvent (UniqueID, String.Empty);
			Page page = Page;
			if (CausesValidation && page != null)
				page.Validate (ValidationGroup);

			OnSelectedIndexChanged (EventArgs.Empty);
		}

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

		Style IRepeatInfoUser.GetItemStyle (ListItemType itemType,  int repeatIndex)
		{
			return GetItemStyle (itemType, repeatIndex);
		}

		void IRepeatInfoUser.RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
		{
			RenderItem (itemType, repeatIndex, repeatInfo, writer);
		}

		protected internal override void Render (HtmlTextWriter writer)
		{
			Page page = Page;
			if (page != null)
				page.ClientScript.RegisterForEventValidation (UniqueID);

			if (Items.Count == 0)
				return;

			RepeatInfo repeat = new RepeatInfo ();
			repeat.RepeatColumns = RepeatColumns;
			repeat.RepeatDirection = RepeatDirection;
			repeat.RepeatLayout = RepeatLayout;

			tabIndex = TabIndex;
			TabIndex = 0;

			repeat.RenderRepeater (writer, this, ControlStyle, this);

			TabIndex = tabIndex;
		}
	}

}