Initial Commit

Library/PackageCache/com.unity.timeline@1.5.4/Editor/Utilities/Clipboard.cs

@@ -0,0 +1,144 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    class Clipboard
+    {
+        class ExposedReferenceTable : IExposedPropertyTable
+        {
+            Dictionary<PropertyName, Object> m_ReferenceTable = new Dictionary<PropertyName, Object>();
+            public void SetReferenceValue(PropertyName id, Object value)
+            {
+                m_ReferenceTable[id] = value;
+            }
+
+            public Object GetReferenceValue(PropertyName id, out bool idValid)
+            {
+                Object reference;
+                idValid = m_ReferenceTable.TryGetValue(id, out reference);
+                return reference;
+            }
+
+            public void ClearReferenceValue(PropertyName id)
+            {
+                m_ReferenceTable.Remove(id);
+            }
+
+            public void Clear()
+            {
+                m_ReferenceTable.Clear();
+            }
+        }
+
+        public struct ClipboardTrackEntry
+        {
+            public TrackAsset item;
+            public TrackAsset parent;
+            public Object binding;
+        }
+
+        static readonly int kListInitialSize = 10;
+
+        readonly List<ItemsPerTrack> m_ItemsData = new List<ItemsPerTrack>(kListInitialSize);
+        readonly List<ClipboardTrackEntry> m_trackData = new List<ClipboardTrackEntry>(kListInitialSize);
+        TimelineAsset rootTimeline;
+
+        public readonly IExposedPropertyTable exposedPropertyTable = new ExposedReferenceTable();
+
+        public Clipboard()
+        {
+            rootTimeline = CreateTimeline();
+
+            EditorApplication.playModeStateChanged  += OnPlayModeChanged;
+        }
+
+        public void CopyItems(IEnumerable<ITimelineItem> items)
+        {
+            using (new TimelineUndo.DisableUndoGuard(true))
+            {
+                var itemsByParent = items.ToLookup(i => i.parentTrack);
+                foreach (var itemsGroup in itemsByParent)
+                {
+                    var parent = itemsGroup.Key;
+                    var itemsList = new List<ITimelineItem>();
+                    foreach (var item in itemsGroup)
+                    {
+                        if (item is ClipItem)
+                            itemsList.Add(CopyItem((ClipItem)item));
+                        else if (item is MarkerItem)
+                            itemsList.Add(CopyItem((MarkerItem)item));
+                    }
+                    m_ItemsData.Add(new ItemsPerTrack(parent, itemsList));
+                }
+            }
+        }
+
+        ClipItem CopyItem(ClipItem clipItem)
+        {
+            var newClip = TimelineHelpers.Clone(clipItem.clip, TimelineWindow.instance.state.editSequence.director, exposedPropertyTable, rootTimeline);
+            return new ClipItem(newClip);
+        }
+
+        static MarkerItem CopyItem(MarkerItem markerItem)
+        {
+            var markerObject = markerItem.marker as Object;
+            if (markerObject != null)
+            {
+                var newMarker = Object.Instantiate(markerObject);
+                newMarker.name = markerObject.name;
+                return new MarkerItem((IMarker)newMarker);
+            }
+
+            return null;
+        }
+
+        public void CopyTracks(IEnumerable<TrackAsset> tracks)
+        {
+            using (new TimelineUndo.DisableUndoGuard(true))
+            {
+                foreach (var track in TrackExtensions.FilterTracks(tracks))
+                {
+                    var newTrack = track.Duplicate(TimelineEditor.inspectedDirector, TimelineEditor.clipboard.exposedPropertyTable, rootTimeline);
+                    var bind = TimelineEditor.inspectedDirector != null ? TimelineEditor.inspectedDirector.GetGenericBinding(track) : null;
+                    m_trackData.Add(new ClipboardTrackEntry {item = newTrack, parent = track.parent as TrackAsset, binding = bind});
+                }
+            }
+        }
+
+        public IEnumerable<ClipboardTrackEntry> GetTracks()
+        {
+            return m_trackData;
+        }
+
+        public IEnumerable<ItemsPerTrack> GetCopiedItems()
+        {
+            return m_ItemsData;
+        }
+
+        public void Clear()
+        {
+            m_ItemsData.Clear();
+            m_trackData.Clear();
+            rootTimeline = CreateTimeline();
+            ((ExposedReferenceTable)exposedPropertyTable).Clear();
+        }
+
+        private void OnPlayModeChanged(PlayModeStateChange state)
+        {
+            if (state == PlayModeStateChange.EnteredEditMode || state == PlayModeStateChange.EnteredPlayMode)
+                Clear();
+        }
+
+        static TimelineAsset CreateTimeline()
+        {
+            var timeline = ScriptableObject.CreateInstance<TimelineAsset>();
+            timeline.hideFlags |= HideFlags.DontSave;
+            timeline.name = "Clipboard";
+
+            return timeline;
+        }
+    }
+}