Copy/Paste/Cut operations

SerializeReferenceEditor/Assets/SREditor/Package/Editor/Scripts/SRActions/CopyPropertySRAction.cs

@@ -0,0 +1,17 @@
+using UnityEditor;
+
+namespace SerializeReferenceEditor.Editor.SRActions
+{
+    public class CopyPropertySRAction : BaseSRAction
+    {
+        public CopyPropertySRAction(SerializedProperty currentProperty, SerializedProperty parentProperty)
+            : base(currentProperty, parentProperty)
+        {
+        }
+
+        protected override void DoApply()
+        {
+            SRClipboard.ManagedReferenceValue = Property.managedReferenceValue;
+        }
+    }
+}

SerializeReferenceEditor/Assets/SREditor/Package/Editor/Scripts/SRActions/CutPropertySRAction.cs

@@ -0,0 +1,22 @@
+using UnityEditor;
+
+namespace SerializeReferenceEditor.Editor.SRActions
+{
+    public class CutPropertySRAction : BaseSRAction
+    {
+        public CutPropertySRAction(SerializedProperty currentProperty, SerializedProperty parentProperty)
+            : base(currentProperty, parentProperty)
+        {
+        }
+
+        protected override void DoApply()
+        {
+            Undo.RegisterCompleteObjectUndo(Property.serializedObject.targetObject, "Cut element");
+            Undo.FlushUndoRecordObjects();
+
+            SRClipboard.ManagedReferenceValue = Property.managedReferenceValue;
+            Property.managedReferenceValue = null;
+            Property.serializedObject.ApplyModifiedProperties();
+        }
+    }
+}

SerializeReferenceEditor/Assets/SREditor/Package/Editor/Scripts/SRActions/PastePropertySRAction.cs

@@ -0,0 +1,24 @@
+using UnityEditor;
+
+namespace SerializeReferenceEditor.Editor.SRActions
+{
+    public class PastePropertySRAction : BaseSRAction
+    {
+        public PastePropertySRAction(SerializedProperty currentProperty, SerializedProperty parentProperty)
+            : base(currentProperty, parentProperty)
+        {
+        }
+
+        protected override void DoApply()
+        {
+            if (!SRClipboard.HasValue)
+                return;
+
+            Undo.RegisterCompleteObjectUndo(Property.serializedObject.targetObject, "Paste element");
+            Undo.FlushUndoRecordObjects();
+
+            Property.managedReferenceValue = SRClipboard.ManagedReferenceValue;
+            Property.serializedObject.ApplyModifiedProperties();
+        }
+    }
+}

SerializeReferenceEditor/Assets/SREditor/Package/Editor/Scripts/SRActions/SRActionFactory.cs

@@ -23,5 +23,14 @@ public InstanceClassSRAction InstantiateBuild(string type)
 
         public ErasePropertySRAction EraseBuild()
             => new ErasePropertySRAction(_currentProperty, _parentProperty);
+
+        public CopyPropertySRAction CopyBuild()
+            => new CopyPropertySRAction(_currentProperty, _parentProperty);
+
+        public PastePropertySRAction PasteBuild()
+            => new PastePropertySRAction(_currentProperty, _parentProperty);
+
+        public CutPropertySRAction CutBuild()
+            => new CutPropertySRAction(_currentProperty, _parentProperty);
     }
-}
+}

SerializeReferenceEditor/Assets/SREditor/Package/Editor/Scripts/SRActions/SRClipboard.cs

@@ -0,0 +1,9 @@
+namespace SerializeReferenceEditor.Editor.SRActions
+{
+    public static class SRClipboard
+    {
+        public static object ManagedReferenceValue { get; set; }
+
+        public static bool HasValue => ManagedReferenceValue != null;
+    }
+}

SerializeReferenceEditor/Assets/SREditor/Package/Editor/Scripts/SearchTree/SRTypesSearchWindowProvider.cs

@@ -40,10 +40,25 @@ private static List<SearchTreeEntry> GenerateSearchTreeEntries(
                     userData = srActionFactory.EraseBuild(),
                     level = 1
                 },
+                new(new GUIContent("Copy"))
+                {
+                    userData = srActionFactory.CopyBuild(),
+                    level = 1
+                },
+                new(new GUIContent("Paste"))
+                {
+                    userData = srActionFactory.PasteBuild(),
+                    level = 1
+                },
+                new(new GUIContent("Cut"))
+                {
+                    userData = srActionFactory.CutBuild(),
+                    level = 1
+                },
             };
             list.AddRange(srTypeTreeFactory.MakeTypesTree(srActionFactory));
 
             return list;
         }
     }
-}
+}

SerializeReferenceEditor/Assets/SREditor/Package/Scripts/FormerlySerializedTypeAttribute.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Linq;
+#if UNITY_EDITOR
 using SerializeReferenceEditor.Services;
+#endif
 
 namespace SerializeReferenceEditor
 {
@@ -87,4 +89,4 @@ public FormerlySerializedTypeAttribute(string oldTypeFullName)
         }
 #endif
     }
-}
+}