Add HotkeyManager class.

OpenRA.Game/HotkeyManager.cs

@@ -0,0 +1,69 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using OpenRA.FileSystem;
+
+namespace OpenRA
+{
+	public sealed class HotkeyManager
+	{
+		readonly KeySettings settings;
+		readonly Dictionary<string, HotkeyDefinition> keys = new Dictionary<string, HotkeyDefinition>();
+
+		public HotkeyManager(IReadOnlyFileSystem fileSystem, KeySettings settings, Manifest manifest)
+		{
+			this.settings = settings;
+
+			var keyDefinitions = MiniYaml.Load(fileSystem, manifest.Hotkeys, null);
+			foreach (var kd in keyDefinitions)
+				keys[kd.Key] = new HotkeyDefinition(kd.Key, kd.Value);
+		}
+
+		internal Func<Hotkey> GetHotkeyReference(string name)
+		{
+			var ret = settings.GetHotkeyReference(name);
+			if (ret != null)
+				return ret;
+
+			HotkeyDefinition keyDefinition;
+			if (keys.TryGetValue(name, out keyDefinition))
+				return () => keyDefinition.Default;
+
+			// Not a mod-defined hotkey, so try and parse as a hardcoded definition
+			Hotkey key;
+			if (!Hotkey.TryParse(name, out key))
+				key = Hotkey.Invalid;
+
+			return () => key;
+		}
+
+		public void Set(string name, Hotkey value)
+		{
+			var field = settings.GetType().GetField(name + "Key");
+			if (field == null)
+				return;
+
+			field.SetValue(settings, value);
+		}
+
+		public HotkeyReference this[string name]
+		{
+			get
+			{
+				return new HotkeyReference(GetHotkeyReference(name));
+			}
+		}
+
+		public IEnumerable<HotkeyDefinition> Definitions { get { return keys.Values; } }
+	}
+}