Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Window/TimelineWindow_PreviewPlayMode.cs

@@ -0,0 +1,80 @@
+using System;
+using UnityEngine;
+using UnityEngine.Playables;
+
+namespace UnityEditor.Timeline
+{
+    partial class TimelineWindow
+    {
+        void OnPreviewPlayModeChanged(bool isPlaying)
+        {
+            if (EditorApplication.isPlaying)
+                return;
+
+            if (isPlaying)
+            {
+                PreparePreviewPlay();
+                EditorApplication.update += OnPreviewPlay;
+            }
+            else
+            {
+                EditorApplication.update -= OnPreviewPlay;
+            }
+        }
+
+        void PreparePreviewPlay()
+        {
+            if (state == null || state.masterSequence.asset == null || state.masterSequence.director == null)
+                return;
+            if (state.playRangeEnabled && !state.isJogging)
+            {
+                EnsurePlayRangeIsRespected();
+            }
+        }
+
+        internal void OnPreviewPlay()
+        {
+            if (state == null || state.masterSequence.asset == null || state.masterSequence.director == null)
+                return;
+
+            var director = state.masterSequence.director;
+            if (director.timeUpdateMode == DirectorUpdateMode.Manual)
+            {
+                Repaint();
+                return;
+            }
+
+            if (state.isJogging)
+            {
+                ApplyJog();
+            }
+            else if (state.playRangeEnabled)
+            {
+                EnsurePlayRangeIsRespected();
+            }
+
+            if (director.extrapolationMode == DirectorWrapMode.None && director.playableGraph.IsValid() && director.playableGraph.IsDone())
+            {
+                //reset time if we hit the end of the timeline
+                state.masterSequence.time = 0.0;
+                state.Pause();
+            }
+
+            Repaint();
+            AudioMixerWindow.RepaintAudioMixerWindow();
+        }
+
+        void ApplyJog()
+        {
+            state.masterSequence.time = Math.Max(0.0, Math.Min(state.masterSequence.duration, state.masterSequence.time + state.playbackSpeed));
+        }
+
+        void EnsurePlayRangeIsRespected()
+        {
+            var playRangeTime = state.playRange;
+            var time = state.masterSequence.time;
+            if (time > playRangeTime.y || time < playRangeTime.x)
+                state.masterSequence.time = playRangeTime.x;
+        }
+    }
+}