Add copy/paste to the map editor.

OpenRA.Mods.Common/Traits/World/EditorActorPreview.cs

@@ -161,5 +161,10 @@ namespace OpenRA.Mods.Common.Traits
 				.SelectMany(rpi => rpi.RenderPreview(init))
 				.ToArray();
 		}
+
+		public ActorReference Export()
+		{
+			return new ActorReference(actor.Type, actor.Save().ToDictionary());
+		}
 	}
 }

OpenRA.Mods.Common/Traits/World/EditorSelectionLayer.cs

@@ -0,0 +1,105 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using OpenRA.Graphics;
+using OpenRA.Mods.Common.Graphics;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Required for the map editor to work. Attach this to the world actor.")]
+	public class EditorSelectionLayerInfo : ITraitInfo
+	{
+		[PaletteReference]
+		[Desc("Palette to use for rendering the placement sprite.")]
+		public readonly string Palette = "terrain";
+
+		[Desc("Sequence image where the selection overlay types are defined.")]
+		public readonly string Image = "editor-overlay";
+
+		[SequenceReference("Image")]
+		[Desc("Sequence to use for the copy overlay.")]
+		public readonly string CopySequence = "copy";
+
+		[SequenceReference("Image")]
+		[Desc("Sequence to use for the paste overlay.")]
+		public readonly string PasteSequence = "paste";
+
+		public virtual object Create(ActorInitializer init) { return new EditorSelectionLayer(init.Self, this); }
+	}
+
+	public class EditorSelectionLayer : IWorldLoaded, IPostRender
+	{
+		readonly EditorSelectionLayerInfo info;
+		readonly Map map;
+		readonly Sprite copySprite;
+		readonly Sprite pasteSprite;
+		PaletteReference palette;
+
+		public CellRegion CopyRegion { get; private set; }
+		public CellRegion PasteRegion { get; private set; }
+
+		public EditorSelectionLayer(Actor self, EditorSelectionLayerInfo info)
+		{
+			if (self.World.Type != WorldType.Editor)
+				return;
+
+			this.info = info;
+			map = self.World.Map;
+			copySprite = map.SequenceProvider.GetSequence(info.Image, info.CopySequence).GetSprite(0);
+			pasteSprite = map.SequenceProvider.GetSequence(info.Image, info.PasteSequence).GetSprite(0);
+		}
+
+		public void WorldLoaded(World w, WorldRenderer wr)
+		{
+			if (w.Type != WorldType.Editor)
+				return;
+
+			palette = wr.Palette(info.Palette);
+		}
+
+		public void SetCopyRegion(CPos start, CPos end)
+		{
+			CopyRegion = CellRegion.BoundingRegion(map.Grid.Type, new[] { start, end });
+		}
+
+		public void SetPasteRegion(CPos start, CPos end)
+		{
+			PasteRegion = CellRegion.BoundingRegion(map.Grid.Type, new[] { start, end });
+		}
+
+		public void Clear()
+		{
+			CopyRegion = PasteRegion = null;
+		}
+
+		public void RenderAfterWorld(WorldRenderer wr, Actor self)
+		{
+			if (wr.World.Type != WorldType.Editor)
+				return;
+
+			if (CopyRegion != null)
+				foreach (var c in CopyRegion)
+					new SpriteRenderable(copySprite, wr.World.Map.CenterOfCell(c),
+						WVec.Zero, -511, palette, 1f, true).PrepareRender(wr).Render(wr);
+
+			if (PasteRegion != null)
+				foreach (var c in PasteRegion)
+					new SpriteRenderable(pasteSprite, wr.World.Map.CenterOfCell(c),
+						WVec.Zero, -511, palette, 1f, true).PrepareRender(wr).Render(wr);
+		}
+	}
+}