1 files changed, 54 insertions, 0 deletions
diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Runtime/Animation/AnimationPreviewUpdateCallback.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Runtime/Animation/AnimationPreviewUpdateCallback.cs
new file mode 100644
index 0000000..560f900
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Runtime/Animation/AnimationPreviewUpdateCallback.cs
@@ -0,0 +1,54 @@
+using System.Collections.Generic;
+using UnityEngine.Animations;
+using UnityEngine.Experimental.Animations;
+using UnityEngine.Playables;
+
+namespace UnityEngine.Timeline
+{
+    class AnimationPreviewUpdateCallback : ITimelineEvaluateCallback
+    {
+        AnimationPlayableOutput m_Output;
+        PlayableGraph m_Graph;
+        List<IAnimationWindowPreview> m_PreviewComponents;
+
+        public AnimationPreviewUpdateCallback(AnimationPlayableOutput output)
+        {
+            m_Output = output;
+
+            Playable playable = m_Output.GetSourcePlayable();
+            if (playable.IsValid())
+            {
+                m_Graph = playable.GetGraph();
+            }
+        }
+
+        public void Evaluate()
+        {
+            if (!m_Graph.IsValid())
+                return;
+
+            if (m_PreviewComponents == null)
+                FetchPreviewComponents();
+
+            foreach (var component in m_PreviewComponents)
+            {
+                if (component != null)
+                {
+                    component.UpdatePreviewGraph(m_Graph);
+                }
+            }
+        }
+
+        private void FetchPreviewComponents()
+        {
+            m_PreviewComponents = new List<IAnimationWindowPreview>();
+
+            var animator = m_Output.GetTarget();
+            if (animator == null)
+                return;
+
+            var gameObject = animator.gameObject;
+            m_PreviewComponents.AddRange(gameObject.GetComponents<IAnimationWindowPreview>());
+        }
+    }
+}