Add initial implementation of editor clipboard

osu.Game/Screens/Edit/ClipboardContent.cs

@@ -0,0 +1,27 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using Newtonsoft.Json;
+using osu.Game.IO.Serialization;
+using osu.Game.IO.Serialization.Converters;
+using osu.Game.Rulesets.Objects;
+
+namespace osu.Game.Screens.Edit
+{
+    public class ClipboardContent : IJsonSerializable
+    {
+        [JsonConverter(typeof(TypedListConverter<HitObject>))]
+        public IList<HitObject> HitObjects;
+
+        public ClipboardContent()
+        {
+        }
+
+        public ClipboardContent(EditorBeatmap editorBeatmap)
+        {
+            HitObjects = editorBeatmap.SelectedHitObjects.ToList();
+        }
+    }
+}

osu.Game/Screens/Edit/Editor.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using osu.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -22,6 +23,7 @@ using osu.Game.Graphics;
 using osu.Game.Graphics.Cursor;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Input.Bindings;
+using osu.Game.IO.Serialization;
 using osu.Game.Online.API;
 using osu.Game.Overlays;
 using osu.Game.Rulesets.Edit;
@@ -131,9 +133,14 @@ namespace osu.Game.Screens.Edit
             updateLastSavedHash();
 
             EditorMenuBar menuBar;
+
             OsuMenuItem undoMenuItem;
             OsuMenuItem redoMenuItem;
 
+            EditorMenuItem cutMenuItem;
+            EditorMenuItem copyMenuItem;
+            EditorMenuItem pasteMenuItem;
+
             var fileMenuItems = new List<MenuItem>
             {
                 new EditorMenuItem("Save", MenuItemType.Standard, Save)
@@ -183,7 +190,11 @@ namespace osu.Game.Screens.Edit
                                     Items = new[]
                                     {
                                         undoMenuItem = new EditorMenuItem("Undo", MenuItemType.Standard, Undo),
-                                        redoMenuItem = new EditorMenuItem("Redo", MenuItemType.Standard, Redo)
+                                        redoMenuItem = new EditorMenuItem("Redo", MenuItemType.Standard, Redo),
+                                        new EditorMenuItemSpacer(),
+                                        cutMenuItem = new EditorMenuItem("Cut", MenuItemType.Standard, Cut),
+                                        copyMenuItem = new EditorMenuItem("Copy", MenuItemType.Standard, Copy),
+                                        pasteMenuItem = new EditorMenuItem("Paste", MenuItemType.Standard, Paste),
                                     }
                                 }
                             }
@@ -244,6 +255,17 @@ namespace osu.Game.Screens.Edit
             changeHandler.CanUndo.BindValueChanged(v => undoMenuItem.Action.Disabled = !v.NewValue, true);
             changeHandler.CanRedo.BindValueChanged(v => redoMenuItem.Action.Disabled = !v.NewValue, true);
 
+            // todo: BindCollectionChanged
+            editorBeatmap.SelectedHitObjects.CollectionChanged += (_, __) =>
+            {
+                var hasObjects = editorBeatmap.SelectedHitObjects.Count > 0;
+
+                cutMenuItem.Action.Disabled = !hasObjects;
+                copyMenuItem.Action.Disabled = !hasObjects;
+            };
+
+            clipboard.BindValueChanged(content => pasteMenuItem.Action.Disabled = string.IsNullOrEmpty(content.NewValue));
+
             menuBar.Mode.ValueChanged += onModeChanged;
 
             bottomBackground.Colour = colours.Gray2;
@@ -394,6 +416,34 @@ namespace osu.Game.Screens.Edit
             this.Exit();
         }
 
+        private readonly Bindable<string> clipboard = new Bindable<string>();
+
+        protected void Cut()
+        {
+            Copy();
+            foreach (var h in editorBeatmap.SelectedHitObjects.ToArray())
+                editorBeatmap.Remove(h);
+        }
+
+        protected void Copy()
+        {
+            clipboard.Value = new ClipboardContent(editorBeatmap).Serialize();
+        }
+
+        protected void Paste()
+        {
+            if (string.IsNullOrEmpty(clipboard.Value))
+                return;
+
+            var objects = clipboard.Value.Deserialize<ClipboardContent>().HitObjects;
+            double timeOffset = clock.CurrentTime - objects.First().StartTime;
+
+            foreach (var h in objects)
+                h.StartTime += timeOffset;
+
+            editorBeatmap.AddRange(objects);
+        }
+
         protected void Undo() => changeHandler.RestoreState(-1);
 
         protected void Redo() => changeHandler.RestoreState(1);