1 files changed, 257 insertions, 0 deletions
diff --git a/source/ShiftUI/Internal/BindingContext.cs b/source/ShiftUI/Internal/BindingContext.cs
new file mode 100644
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+// 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.
+//
+// Copyright (c) 2004-2005 Novell, Inc.
+//
+// Authors:
+//	Peter Bartok	[email protected]
+//	Jackson Harper	[email protected]
+
+
+using System.Data;
+using System.Collections;
+using System.Globalization;
+using System.ComponentModel;
+using System;
+
+namespace ShiftUI {
+
+	[DefaultEvent("CollectionChanged")]
+	public class BindingContext : ICollection, IEnumerable {
+
+		private Hashtable managers;
+		private EventHandler onCollectionChangedHandler;
+
+		private class HashKey {
+			public object source;
+			public string member;
+
+			public HashKey (object source, string member)
+			{
+				this.source = source;
+				this.member = member;
+			}
+
+			public override int GetHashCode ()
+			{
+				return source.GetHashCode() ^ member.GetHashCode ();
+			}
+
+			public override bool Equals (object o)
+			{
+				HashKey hk = o as HashKey;
+				if (hk == null)
+					return false;
+				return hk.source == source && hk.member == member;
+			}
+		}
+
+		public BindingContext () 
+		{
+			managers = new Hashtable ();
+			onCollectionChangedHandler = null;
+		}
+
+		public bool IsReadOnly {
+			get { return false; }
+		}
+
+		public BindingManagerBase this [object dataSource] {
+			get { return this [dataSource, String.Empty]; }
+		}
+
+		public BindingManagerBase this [object dataSource, string dataMember] {
+			get {
+				if (dataSource == null)
+					throw new ArgumentNullException ("dataSource");
+				if (dataMember == null)
+					dataMember = String.Empty;
+
+				ICurrencyManagerProvider cm_provider = dataSource as ICurrencyManagerProvider;
+				if (cm_provider != null) {
+					if (dataMember.Length == 0)
+						return cm_provider.CurrencyManager;
+
+					return cm_provider.GetRelatedCurrencyManager (dataMember);
+				}
+
+				HashKey key = new HashKey (dataSource, dataMember);
+				BindingManagerBase res = managers [key] as BindingManagerBase;
+
+				if (res != null)
+					return res;
+
+				res = CreateBindingManager (dataSource, dataMember);
+				if (res == null)
+					return null;
+				managers [key] = res;
+				return res;
+			}
+		}
+
+		private BindingManagerBase CreateBindingManager (object data_source, string data_member)
+		{
+			if (data_member == "") {
+				if (IsListType (data_source.GetType ()))
+					return new CurrencyManager (data_source);
+				else
+					return new PropertyManager (data_source);
+			}
+			else {
+				BindingMemberInfo info = new BindingMemberInfo (data_member);
+
+				BindingManagerBase parent_manager = this[data_source, info.BindingPath];
+
+				PropertyDescriptor pd = parent_manager == null ? null : parent_manager.GetItemProperties ().Find (info.BindingField, true);
+
+				if (pd == null)
+					throw new ArgumentException (String.Format ("Cannot create a child list for field {0}.", info.BindingField));
+
+				if (IsListType (pd.PropertyType))
+					return new RelatedCurrencyManager (parent_manager, pd);
+				else
+					return new RelatedPropertyManager (parent_manager, info.BindingField);
+			}
+		}
+
+		bool IsListType (Type t)
+		{
+			return (typeof (IList).IsAssignableFrom (t)
+				|| typeof (IListSource).IsAssignableFrom (t));
+		}
+
+		#region Public Instance Methods
+		public bool Contains(object dataSource)
+		{
+			return Contains (dataSource, String.Empty);
+		}
+
+		public bool Contains (object dataSource, string dataMember)
+		{
+			if (dataSource == null)
+				throw new ArgumentNullException ("dataSource");
+			if (dataMember == null)
+				dataMember = String.Empty;
+
+			HashKey key = new HashKey (dataSource, dataMember);
+			return managers [key] != null;
+		}
+		#endregion	// Public Instance Methods
+
+		#region Protected Instance Methods
+
+		protected internal void Add (object dataSource, BindingManagerBase listManager)
+		{
+			AddCore (dataSource, listManager);
+			OnCollectionChanged (new CollectionChangeEventArgs (CollectionChangeAction.Add, dataSource));
+		}
+
+		protected virtual void AddCore (object dataSource, BindingManagerBase listManager)
+		{
+			if (dataSource == null)
+				throw new ArgumentNullException ("dataSource");
+			if (listManager == null)
+				throw new ArgumentNullException ("listManager");
+
+			HashKey key = new HashKey (dataSource, String.Empty);
+			managers [key] = listManager;
+		}
+
+		protected internal void Clear ()
+		{
+			ClearCore();
+			OnCollectionChanged (new CollectionChangeEventArgs (CollectionChangeAction.Refresh, null));
+		}
+
+		protected virtual void ClearCore ()
+		{
+			managers.Clear ();
+		}
+
+		protected virtual void OnCollectionChanged (CollectionChangeEventArgs ccevent)
+		{
+			if (onCollectionChangedHandler != null) {
+				onCollectionChangedHandler (this, ccevent);
+			}
+		}
+
+		protected internal void Remove (object dataSource)
+		{
+			if (dataSource == null)
+				throw new ArgumentNullException ("dataSource");
+
+			RemoveCore (dataSource);
+			OnCollectionChanged (new CollectionChangeEventArgs (CollectionChangeAction.Remove, dataSource));
+		}
+
+		protected virtual void RemoveCore (object dataSource)
+		{
+			HashKey[] keys = new HashKey [managers.Keys.Count];
+			managers.Keys.CopyTo (keys, 0);
+
+			for (int i = 0; i < keys.Length; i ++) {
+				if (keys[i].source == dataSource)
+					managers.Remove (keys[i]);
+			}
+		}
+
+		[MonoTODO ("Stub, does nothing")]
+		public static void UpdateBinding (BindingContext newBindingContext, Binding binding)
+		{
+		}
+
+		#endregion	// Protected Instance Methods
+
+		#region Events
+		[Browsable (false)]
+		//[EditorBrowsable (EditorBrowsableState.Never)]
+		public event CollectionChangeEventHandler CollectionChanged {
+			add { throw new NotImplementedException (); }
+			remove { /* nothing to do here.. */ }
+		}
+		#endregion	// Events
+
+		#region ICollection Interfaces
+		void ICollection.CopyTo (Array ar, int index)
+		{
+			managers.CopyTo (ar, index);
+		}
+
+		int ICollection.Count {
+			get { return managers.Count; }
+		}
+
+		bool ICollection.IsSynchronized {
+			get { return false; }
+		}
+
+		object ICollection.SyncRoot {
+			get { return null; }
+		}
+
+		#endregion	// ICollection Interfaces
+
+		#region IEnumerable Interfaces
+		[MonoInternalNote ("our enumerator is slightly different.  in MS's implementation the Values are WeakReferences to the managers.")]
+		IEnumerator IEnumerable.GetEnumerator() {
+			return managers.GetEnumerator ();
+		}
+		#endregion	// IEnumerable Interfaces
+	}
+}