1 files changed, 71 insertions, 0 deletions
diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Editor/treeview/IPropertyKeyDataSource.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/treeview/IPropertyKeyDataSource.cs
new file mode 100644
index 0000000..a26deb6
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/treeview/IPropertyKeyDataSource.cs
@@ -0,0 +1,71 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UnityEditorInternal;
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    interface IPropertyKeyDataSource
+    {
+        float[] GetKeys(); // Get the keys
+        Dictionary<float, string> GetDescriptions(); // Caches for descriptions
+    }
+
+    abstract class BasePropertyKeyDataSource : IPropertyKeyDataSource
+    {
+        static readonly StringBuilder k_StringBuilder = new StringBuilder();
+
+        protected abstract AnimationClip animationClip { get; }
+
+        public virtual float[] GetKeys()
+        {
+            if (animationClip == null)
+                return null;
+
+            var info =  AnimationClipCurveCache.Instance.GetCurveInfo(animationClip);
+            return info.keyTimes.Select(TransformKeyTime).ToArray();
+        }
+
+        public virtual Dictionary<float, string> GetDescriptions()
+        {
+            var map = new Dictionary<float, string>();
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(animationClip);
+            var processed = new HashSet<string>();
+
+            foreach (var b in info.bindings)
+            {
+                var groupID = b.GetGroupID();
+                if (processed.Contains(groupID))
+                    continue;
+
+                var group = info.GetGroupBinding(groupID);
+                var prefix = AnimationWindowUtility.GetNicePropertyGroupDisplayName(b.type, b.propertyName);
+
+                foreach (var t in info.keyTimes)
+                {
+                    k_StringBuilder.Length = 0;
+
+                    var key = TransformKeyTime(t);
+                    if (map.ContainsKey(key))
+                        k_StringBuilder.Append(map[key])
+                            .Append('\n');
+
+                    k_StringBuilder.Append(prefix)
+                        .Append(" : ")
+                        .Append(group.GetDescription(key));
+
+                    map[key] = k_StringBuilder.ToString();
+                }
+                processed.Add(groupID);
+            }
+
+            return map;
+        }
+
+        protected virtual float TransformKeyTime(float keyTime)
+        {
+            return keyTime;
+        }
+    }
+}