1 files changed, 138 insertions, 0 deletions
diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Manipulators/Move/MoveItemModeMix.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Manipulators/Move/MoveItemModeMix.cs
new file mode 100644
index 0000000..d4df368
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Manipulators/Move/MoveItemModeMix.cs
@@ -0,0 +1,138 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    class MoveItemModeMix : IMoveItemMode, IMoveItemDrawer
+    {
+        public void OnTrackDetach(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public void HandleTrackSwitch(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            foreach (var itemsGroup in itemsGroups)
+            {
+                var targetTrack = itemsGroup.targetTrack;
+                if (targetTrack != null && itemsGroup.items.Any())
+                {
+                    var compatible = itemsGroup.items.First().IsCompatibleWithTrack(targetTrack) &&
+                        !EditModeUtils.IsInfiniteTrack(targetTrack);
+                    var track = compatible ? targetTrack : null;
+
+                    if (track != null)
+                        TimelineUndo.PushUndo(track, "Move Items");
+
+                    EditModeUtils.SetParentTrack(itemsGroup.items, track);
+                }
+                else
+                {
+                    EditModeUtils.SetParentTrack(itemsGroup.items, null);
+                }
+            }
+        }
+
+        public bool AllowTrackSwitch()
+        {
+            return true;
+        }
+
+        public double AdjustStartTime(WindowState state, ItemsPerTrack itemsGroup, double time)
+        {
+            return time;
+        }
+
+        public void OnModeClutchEnter(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public void OnModeClutchExit(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public void BeginMove(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public void UpdateMove(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public void FinishMove(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public bool ValidateMove(ItemsPerTrack itemsGroup)
+        {
+            var track = itemsGroup.targetTrack;
+            var items = itemsGroup.items;
+
+            if (EditModeUtils.IsInfiniteTrack(track))
+            {
+                double startTime;
+                double stopTime;
+                EditModeUtils.GetInfiniteClipBoundaries(track, out startTime, out stopTime);
+
+                return items.All(item =>
+                    !EditModeUtils.IsItemWithinRange(item, startTime, stopTime) &&
+                    !EditModeUtils.IsRangeWithinItem(startTime, stopTime, item));
+            }
+
+            var siblings = ItemsUtils.GetItemsExcept(itemsGroup.targetTrack, items);
+            return items.All(item => EditModeMixUtils.GetPlacementValidity(item, siblings) == PlacementValidity.Valid);
+        }
+
+        public void DrawGUI(WindowState state, IEnumerable<MovingItems> movingItems, Color color)
+        {
+            var selectionHasAnyBlendIn = false;
+            var selectionHasAnyBlendOut = false;
+
+            foreach (var grabbedItems in movingItems)
+            {
+                var bounds = grabbedItems.onTrackItemsBounds;
+
+                var counter = 0;
+                foreach (var item in grabbedItems.items.OfType<IBlendable>())
+                {
+                    if (item.hasLeftBlend)
+                    {
+                        EditModeGUIUtils.DrawBoundsEdge(bounds[counter], color, TrimEdge.Start);
+                        selectionHasAnyBlendIn = true;
+                    }
+
+                    if (item.hasRightBlend)
+                    {
+                        EditModeGUIUtils.DrawBoundsEdge(bounds[counter], color, TrimEdge.End);
+                        selectionHasAnyBlendOut = true;
+                    }
+                    counter++;
+                }
+            }
+
+            if (selectionHasAnyBlendIn && selectionHasAnyBlendOut)
+            {
+                TimelineCursors.SetCursor(TimelineCursors.CursorType.MixBoth);
+            }
+            else if (selectionHasAnyBlendIn)
+            {
+                TimelineCursors.SetCursor(TimelineCursors.CursorType.MixLeft);
+            }
+            else if (selectionHasAnyBlendOut)
+            {
+                TimelineCursors.SetCursor(TimelineCursors.CursorType.MixRight);
+            }
+            else
+            {
+                TimelineCursors.ClearCursor();
+            }
+        }
+    }
+}