1 files changed, 115 insertions, 0 deletions
diff --git a/main/src/addins/MonoDevelop.Refactoring/MonoDevelop.CodeIssues/Pad/AbstractGroupingProvider.cs b/main/src/addins/MonoDevelop.Refactoring/MonoDevelop.CodeIssues/Pad/AbstractGroupingProvider.cs
new file mode 100644
index 0000000000..3f7cd390c7
--- /dev/null
+++ b/main/src/addins/MonoDevelop.Refactoring/MonoDevelop.CodeIssues/Pad/AbstractGroupingProvider.cs
@@ -0,0 +1,115 @@
+//
+// AbstractGroupingProvider.cs
+//
+// Author:
+//       Simon Lindgren <simon.n.lindgren@gmail.com>
+//
+// Copyright (c) 2013 Simon Lindgren
+//
+// 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;
+
+namespace MonoDevelop.CodeIssues
+{
+	public abstract class AbstractGroupingProvider<T>: IGroupingProvider
+	{
+		/// <summary>
+		/// Associates a parent group and grouping key to a child group.
+		/// </summary>
+		readonly Dictionary<Tuple<IssueGroup, T>, IssueGroup> groups = new Dictionary<Tuple<IssueGroup, T>, IssueGroup> ();
+		
+		protected AbstractGroupingProvider()
+		{
+			Next = NullGroupingProvider.Instance;
+		}
+		
+		#region IGroupingProvider implementation
+
+		protected abstract T GetGroupingKey (IssueSummary issue);
+		
+		protected abstract string GetGroupName (IssueSummary issue);
+
+		public IssueGroup GetIssueGroup (IssueGroup parentGroup, IssueSummary issue)
+		{
+			IssueGroup group;
+			var providerCategory = GetGroupingKey (issue);
+			if (providerCategory == null)
+				return null;
+			var key = Tuple.Create (parentGroup, providerCategory);
+			if (!groups.TryGetValue (key, out group)) {
+				group = new IssueGroup (Next, GetGroupName(issue));
+				groups.Add (key, group);
+			}
+			return group;
+		}
+
+		public void Reset ()
+		{
+			groups.Clear ();
+			Next.Reset ();
+		}
+
+		IGroupingProvider next;
+		public IGroupingProvider Next
+		{
+			get {
+				return next;
+			}
+			set {
+				var eventArgs = new GroupingProviderEventArgs (this, next);
+				next = value;
+				foreach (var group in groups.Values) {
+					group.GroupingProvider = value;
+				}
+				OnNextChanged (eventArgs);
+			}
+		}
+
+		protected virtual void OnNextChanged (GroupingProviderEventArgs eventArgs)
+		{
+			var handler = nextChanged;
+			if (handler != null) {
+				handler (this, eventArgs);
+			}
+		}
+		
+		event EventHandler<GroupingProviderEventArgs> nextChanged;
+		
+		event EventHandler<GroupingProviderEventArgs> IGroupingProvider.NextChanged
+		{
+			add {
+				nextChanged += value;
+			}
+			remove {
+				nextChanged -= value;
+			}
+		}
+
+		public bool SupportsNext
+		{
+			get {
+				return true;
+			}
+		}
+
+		#endregion
+	}
+}
+