1 files changed, 66 insertions, 0 deletions
diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Utilities/MarkerModifier.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Utilities/MarkerModifier.cs
new file mode 100644
index 0000000..9da5277
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Utilities/MarkerModifier.cs
@@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Timeline;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    static class MarkerModifier
+    {
+        public static void DeleteMarker(IMarker marker)
+        {
+            var trackAsset = marker.parent;
+            if (trackAsset != null)
+            {
+                SelectionManager.Remove(marker);
+                trackAsset.DeleteMarker(marker);
+            }
+        }
+
+        public static IEnumerable<IMarker> CloneMarkersToParent(IEnumerable<IMarker> markers, TrackAsset parent)
+        {
+            if (!markers.Any()) return Enumerable.Empty<IMarker>();
+            var clonedMarkers = new List<IMarker>();
+            foreach (var marker in markers)
+                clonedMarkers.Add(CloneMarkerToParent(marker, parent));
+            return clonedMarkers;
+        }
+
+        public static IMarker CloneMarkerToParent(IMarker marker, TrackAsset parent)
+        {
+            var markerObject = marker as ScriptableObject;
+            if (markerObject == null) return null;
+
+            var newMarkerObject = Object.Instantiate(markerObject);
+            AddMarkerToParent(newMarkerObject, parent);
+
+            newMarkerObject.name = markerObject.name;
+            try
+            {
+                CustomTimelineEditorCache.GetMarkerEditor((IMarker)newMarkerObject).OnCreate((IMarker)newMarkerObject, marker);
+            }
+            catch (Exception e)
+            {
+                Debug.LogException(e);
+            }
+
+
+            return (IMarker)newMarkerObject;
+        }
+
+        static void AddMarkerToParent(ScriptableObject marker, TrackAsset parent)
+        {
+            TimelineCreateUtilities.SaveAssetIntoObject(marker, parent);
+            TimelineUndo.RegisterCreatedObjectUndo(marker, "Duplicate Marker");
+            TimelineUndo.PushUndo(parent, "Duplicate Marker");
+
+            if (parent != null)
+            {
+                parent.AddMarker(marker);
+                ((IMarker)marker).Initialize(parent);
+            }
+        }
+    }
+}