Caps: Added indexer and IEnumerable interface

sources/custom/Caps.cs

@@ -0,0 +1,73 @@
+// Iterator.cs - Custom iterator wrapper for IEnumerable
+//
+// Author:  Sebastian Dröge
+//			Stephan Sundermann <stephansundermann@gmail.com>
+//
+// Copyright (c) 2004-2009 Novell, Inc.
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of version 2 of the Lesser GNU General 
+// Public License as published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this program; if not, write to the
+// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+// Boston, MA 02111-1307, USA.
+
+namespace Gst {
+	using System;
+	using System.Collections;
+	using System.Runtime.InteropServices;
+
+	partial class Caps : IEnumerable
+	{
+		public Structure this [uint index] {
+			get {
+				if (index >= Size)
+					throw new ArgumentOutOfRangeException ();
+
+				Structure structure = GetStructure ((uint) index);
+				return structure;
+			}
+		}
+
+		private class StructureEnumerator : IEnumerator {
+			Gst.Caps caps;
+			long index;
+
+			public StructureEnumerator (Gst.Caps caps) {
+				this.caps = caps;
+				index = -1;
+			}
+
+			public object Current {
+				get {
+					if (index >= caps.Size)
+						throw new ArgumentOutOfRangeException ();
+					if (index == -1)
+						throw new ArgumentException ();
+
+					return caps[ (uint) index];
+				}
+			}
+
+			public bool MoveNext () {
+				index += 1;
+				return (index < caps.Size);
+			}
+
+			public void Reset () {
+				index = -1;
+			}
+		}
+
+		public IEnumerator GetEnumerator() {
+			return new StructureEnumerator (this);
+		}
+	}
+}