mono/mcs/class/System.Web/System.Web.UI.WebControls/Menu.cs

//
// System.Web.UI.WebControls.Menu.cs
//
// Authors:
//	Lluis Sanchez Gual ([email protected])
//
// (C) 2004 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.
//

#if NET_2_0

using System;
using System.Collections;
using System.Text;
using System.ComponentModel;
using System.Web.UI;
using System.Web.Handlers;
using System.Collections.Specialized;
using System.IO;

namespace System.Web.UI.WebControls
{
	public class Menu : HierarchicalDataBoundControl, IPostBackEventHandler, INamingContainer
	{
		MenuItemCollection items;
		MenuItemBindingCollection dataBindings;
		MenuItem selectedItem;
		Hashtable bindings;
		
		[PersistenceMode (PersistenceMode.InnerProperty)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
		[Editor ("System.Web.UI.Design.MenuItemBindingsEditor, " + Consts.AssemblySystem_Design, typeof (System.Drawing.Design.UITypeEditor))]
		public virtual MenuItemBindingCollection DataBindings {
			get {
				if (dataBindings == null) {
					dataBindings = new MenuItemBindingCollection ();
					if (IsTrackingViewState)
						((IStateManager)dataBindings).TrackViewState();
				}
				return dataBindings;
			}
		}

		[DefaultValue (500)]
		public virtual int DisappearAfter {
			get {
				object o = ViewState ["DisappearAfter"];
				if (o != null) return (int)o;
				return 500;
			}
			set {
				ViewState["DisappearAfter"] = value;
			}
		}

		[DefaultValue ("")]
		[UrlProperty]
		[WebCategory ("Appearance")]
		[Editor ("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, typeof (System.Drawing.Design.UITypeEditor))]
		public virtual string DynamicBottomSeparatorImageUrl {
			get {
				object o = ViewState ["dbsiu"];
				if (o != null) return (string)o;
				return "";
			}
			set {
				ViewState["dbsiu"] = value;
			}
		}

/*		[DefaultValue (true)]
		public virtual bool DynamicEnableDefaultPopOutImage {
			get {
				object o = ViewState ["dedpoi"];
				if (o != null) return (bool)o;
				return true;
			}
			set {
				ViewState["dedpoi"] = value;
			}
		}
*/
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
		[PersistenceMode (PersistenceMode.InnerProperty)]
		[Editor ("System.Web.UI.Design.MenuItemCollectionEditor, " + Consts.AssemblySystem_Design, typeof (System.Drawing.Design.UITypeEditor))]
		public virtual MenuItemCollection Items {
			get {
				if (items == null) {
					items = new MenuItemCollection (this);
					if (IsTrackingViewState)
						((IStateManager)items).TrackViewState();
				}
				return items;
			}
		}

		[DefaultValue ('/')]
		public virtual char PathSeparator {
			get {
				object o = ViewState ["PathSeparator"];
				if(o != null) return (char)o;
				return '/';
			}
			set {
				ViewState ["PathSeparator"] = value;
			}
		}

		[Browsable (false)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public MenuItem SelectedItem {
			get { return selectedItem; }
		}

		internal void SetSelectedItem (MenuItem item)
		{
			if (selectedItem == item) return;
			if (selectedItem != null)
				selectedItem.SelectedFlag = false;
			selectedItem = item;
			selectedItem.SelectedFlag = true;
	//		OnSelectedItemChanged (new MenuItemEventArgs (selectedItem));
		}
		
		public MenuItem FindItem (string valuePath)
		{
			if (valuePath == null) throw new ArgumentNullException ("valuePath");
			string[] path = valuePath.Split (PathSeparator);
			int n = 0;
			MenuItemCollection col = Items;
			bool foundBranch = true;
			while (col.Count > 0 && foundBranch) {
				foundBranch = false;
				foreach (MenuItem item in col) {
					if (item.Value == path [n]) {
						if (++n == path.Length) return item;
						col = item.ChildItems;
						foundBranch = true;
						break;
					}
				}
			}
			return null;
		}
		
		string GetBindingKey (string dataMember, int depth)
		{
			return dataMember + " " + depth;
		}
		
		internal MenuItemBinding FindBindingForItem (string type, int depth)
		{
			if (bindings == null) return null;

			MenuItemBinding bin = (MenuItemBinding) bindings [GetBindingKey (type, depth)];
			if (bin != null) return bin;
			
			bin = (MenuItemBinding) bindings [GetBindingKey (type, -1)];
			if (bin != null) return bin;
			
			bin = (MenuItemBinding) bindings [GetBindingKey ("", depth)];
			if (bin != null) return bin;
			
			bin = (MenuItemBinding) bindings [GetBindingKey ("", -1)];
			return bin;
		}
		
		protected internal override void PerformDataBinding ()
		{
			base.PerformDataBinding ();
			HierarchicalDataSourceView data = GetData ("");
			IHierarchicalEnumerable e = data.Select ();
			foreach (object obj in e) {
				IHierarchyData hdata = e.GetHierarchyData (obj);
				MenuItem item = new MenuItem ();
				item.Bind (hdata);
				Items.Add (item);
			}
		}
		
		void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
		{
		}
		
		protected override void TrackViewState()
		{
			EnsureDataBound ();
			
			base.TrackViewState();
			if (dataBindings != null) {
				((IStateManager)dataBindings).TrackViewState ();
			}
			if (items != null) {
				((IStateManager)items).TrackViewState();;
			}
		}

		protected override object SaveViewState()
		{
			object[] states = new object [2];
			states[0] = base.SaveViewState();
			states[1] = (dataBindings == null ? null : ((IStateManager)dataBindings).SaveViewState());
			states[2] = (items == null ? null : ((IStateManager)items).SaveViewState());

			for (int i = states.Length - 1; i >= 0; i--) {
				if (states [i] != null)
					return states;
			}

			return null;
		}

		protected override void LoadViewState (object savedState)
		{
			if (savedState == null)
				return;

			object [] states = (object []) savedState;
			base.LoadViewState (states[0]);
			
			if (states[1] != null)
				((IStateManager)dataBindings).LoadViewState(states[8]);
			if (states[2] != null)
				((IStateManager)Items).LoadViewState(states[9]);
		}
		
		protected override void RenderContents (HtmlTextWriter writer)
		{
			writer.WriteLine ("This is a menu");
		}
		
	}
}

#endif