1 files changed, 80 insertions, 0 deletions
diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Window/TimelineWindow_ActiveTimeline.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Window/TimelineWindow_ActiveTimeline.cs
new file mode 100644
index 0000000..004209f
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Window/TimelineWindow_ActiveTimeline.cs
@@ -0,0 +1,80 @@
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    partial class TimelineWindow
+    {
+        private TimelineAsset m_PreviousMasterSequence;
+
+        public void ClearCurrentTimeline()
+        {
+            SetCurrentTimeline(null, null, null, true);
+        }
+
+        public void SetCurrentTimeline(TimelineAsset seq)
+        {
+            SetCurrentTimeline(seq, null, null);
+        }
+
+        public void SetCurrentTimeline(PlayableDirector director, TimelineClip hostClip = null)
+        {
+            var asset = director != null ? director.playableAsset as TimelineAsset : null;
+            SetCurrentTimeline(asset, director, hostClip);
+        }
+
+        void SetCurrentTimeline(TimelineAsset seq, PlayableDirector instanceOfDirector, TimelineClip hostClip, bool force = false)
+        {
+            if (state == null)
+                return;
+
+            if (!force &&
+                state.editSequence.hostClip == hostClip &&
+                state.editSequence.director == instanceOfDirector &&
+                state.editSequence.asset == seq)
+                return;
+
+            state.SetCurrentSequence(seq, instanceOfDirector, hostClip);
+        }
+
+        void OnBeforeSequenceChange()
+        {
+            treeView = null;
+            m_MarkerHeaderGUI = null;
+            m_TimeAreaDirty = true;
+
+            state.Reset();
+            m_PlayableLookup.ClearPlayableLookup();
+
+            // clear old editors to caches, like audio previews, get flushed
+            CustomTimelineEditorCache.ClearCache<ClipEditor>();
+            CustomTimelineEditorCache.ClearCache<MarkerEditor>();
+            CustomTimelineEditorCache.ClearCache<TrackEditor>();
+
+            m_PreviousMasterSequence = state.masterSequence.asset;
+        }
+
+        void OnAfterSequenceChange()
+        {
+            Repaint();
+
+            m_SequencePath = state.GetCurrentSequencePath();
+
+            m_LastFrameHadSequence = state.editSequence.asset != null;
+            TimelineWindowViewPrefs.SaveAll();
+
+            // this prevent clearing the animation window when going in/out of playmode, but
+            // clears it when we switch master timelines
+            // the cast to a object will handle the case where the sequence has been deleted.
+            object previousMasterSequence = m_PreviousMasterSequence;
+            bool isDeleted = previousMasterSequence != null && m_PreviousMasterSequence == null;
+            bool hasChanged = m_PreviousMasterSequence != null && m_PreviousMasterSequence != state.masterSequence.asset;
+            if (isDeleted || hasChanged)
+            {
+                AnimationClipCurveCache.Instance.Clear();
+                TimelineAnimationUtilities.UnlinkAnimationWindow();
+            }
+        }
+    }
+}