Add custom actions for Catch

Reworks input management for rulesets

osu.Game/Input/ActionMappingInputManager.cs

@@ -0,0 +1,34 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Collections.Generic;
+using osu.Framework.Input;
+using OpenTK.Input;
+
+namespace osu.Game.Input
+{
+    public class ActionMappingInputManager<T> : PassThroughInputManager
+        where T : struct
+    {
+        protected IDictionary<Key, T> Mappings { get; set; }
+
+        protected override bool OnKeyDown(InputState state, KeyDownEventArgs args)
+        {
+            mapKey(state, args.Key);
+            return base.OnKeyDown(state, args);
+        }
+
+        protected override bool OnKeyUp(InputState state, KeyUpEventArgs args)
+        {
+            mapKey(state, args.Key);
+            return base.OnKeyUp(state, args);
+        }
+
+        private void mapKey(InputState state, Key key)
+        {
+            T mappedData;
+            if (Mappings.TryGetValue(key, out mappedData))
+                state.Data = mappedData;
+        }
+    }
+}