Added Undo Redo to editor

OpenRA.Mods.Common/Widgets/Logic/Editor/HistoryLogLogic.cs

@@ -0,0 +1,71 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2019 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.Collections.Generic;
+using OpenRA.Graphics;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Primitives;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	public class HistoryLogLogic : ChromeLogic
+	{
+		readonly ScrollPanelWidget panel;
+		readonly EditorActionManager editorActionManager;
+		readonly ScrollItemWidget template;
+
+		readonly Dictionary<EditorActionContainer, ScrollItemWidget> states = new Dictionary<EditorActionContainer, ScrollItemWidget>();
+
+		[ObjectCreator.UseCtor]
+		public HistoryLogLogic(Widget widget, World world, WorldRenderer worldRenderer, Dictionary<string, MiniYaml> logicArgs)
+		{
+			panel = widget.Get<ScrollPanelWidget>("HISTORY_LIST");
+			template = panel.Get<ScrollItemWidget>("HISTORY_TEMPLATE");
+			editorActionManager = world.WorldActor.Trait<EditorActionManager>();
+
+			editorActionManager.ItemAdded += ItemAdded;
+			editorActionManager.ItemRemoved += ItemRemoved;
+		}
+
+		void ItemAdded(EditorActionContainer editorAction)
+		{
+			var item = ScrollItemWidget.Setup(template, () => false, () =>
+			{
+				if (editorAction.Status == EditorActionStatus.History)
+					editorActionManager.Rewind(editorAction.Id);
+				else if (editorAction.Status == EditorActionStatus.Future)
+					editorActionManager.Forward(editorAction.Id);
+			});
+
+			var titleLabel = item.Get<LabelWidget>("TITLE");
+			var textColor = template.TextColor;
+			var futureTextColor = template.TextColorDisabled;
+
+			titleLabel.GetText = () => editorAction.Action.Text;
+			titleLabel.GetColor = () => editorAction.Status == EditorActionStatus.Future ? futureTextColor : textColor;
+
+			item.IsSelected = () => editorAction.Status == EditorActionStatus.Active;
+			panel.AddChild(item);
+
+			states[editorAction] = item;
+		}
+
+		void ItemRemoved(EditorActionContainer editorAction)
+		{
+			var widget = states[editorAction];
+
+			panel.RemoveChild(widget);
+
+			states.Remove(editorAction);
+		}
+	}
+}