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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ActionContext.cs

@@ -0,0 +1,63 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Action context to be used by actions.
+    /// </summary>
+    /// <seealso cref="Invoker"/>
+    /// <seealso cref="TimelineAction"/>
+    public struct ActionContext
+    {
+        IEnumerable<TrackAsset> m_Tracks;
+        IEnumerable<TimelineClip> m_Clips;
+        IEnumerable<IMarker> m_Markers;
+
+        /// <summary>
+        ///  The Timeline asset that is currently opened in the Timeline window.
+        /// </summary>
+        public TimelineAsset timeline;
+
+        /// <summary>
+        ///  The PlayableDirector that is used to play the current Timeline asset.
+        /// </summary>
+        public PlayableDirector director;
+
+        /// <summary>
+        ///  Time based on the position of the cursor on the timeline (in seconds).
+        ///  null if the time is not available (in case of a shortcut for example).
+        /// </summary>
+        public double? invocationTime;
+
+        /// <summary>
+        ///  Tracks that will be used by the actions.
+        /// </summary>
+        public IEnumerable<TrackAsset> tracks
+        {
+            get => m_Tracks ?? Enumerable.Empty<TrackAsset>();
+            set => m_Tracks = value;
+        }
+
+        /// <summary>
+        ///  Clips that will be used by the actions.
+        /// </summary>
+        public IEnumerable<TimelineClip> clips
+        {
+            get => m_Clips ?? Enumerable.Empty<TimelineClip>();
+            set => m_Clips = value;
+        }
+
+        /// <summary>
+        ///  Markers that will be used by the actions.
+        /// </summary>
+        public IEnumerable<IMarker> markers
+        {
+            get => m_Markers ?? Enumerable.Empty<IMarker>();
+            set => m_Markers = value;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ActionContext.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ActionManager.cs

@@ -0,0 +1,306 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Actions
+{
+    static class ActionManager
+    {
+        static bool s_ShowActionTriggeredByShortcut = false;
+
+        public static readonly IReadOnlyList<TimelineAction> TimelineActions = InstantiateClassesOfType<TimelineAction>();
+        public static readonly IReadOnlyList<ClipAction> ClipActions = InstantiateClassesOfType<ClipAction>();
+        public static readonly IReadOnlyList<TrackAction> TrackActions = InstantiateClassesOfType<TrackAction>();
+        public static readonly IReadOnlyList<MarkerAction> MarkerActions = InstantiateClassesOfType<MarkerAction>();
+
+        public static readonly IReadOnlyList<TimelineAction> TimelineActionsWithShortcuts = ActionsWithShortCuts(TimelineActions);
+        public static readonly IReadOnlyList<ClipAction> ClipActionsWithShortcuts = ActionsWithShortCuts(ClipActions);
+        public static readonly IReadOnlyList<TrackAction> TrackActionsWithShortcuts = ActionsWithShortCuts(TrackActions);
+        public static readonly IReadOnlyList<MarkerAction> MarkerActionsWithShortcuts = ActionsWithShortCuts(MarkerActions);
+
+        public static readonly HashSet<Type> ActionsWithAutoUndo = TypesWithAttribute<ApplyDefaultUndoAttribute>();
+
+        public static TU GetCachedAction<T, TU>(this IReadOnlyList<TU> list) where T : TU
+        {
+            return list.FirstOrDefault(x => x.GetType() == typeof(T));
+        }
+
+        public static void GetMenuEntries(IReadOnlyList<TimelineAction> actions, Vector2? mousePos, List<MenuActionItem> menuItems)
+        {
+            var globalContext = TimelineEditor.CurrentContext(mousePos);
+            foreach (var action in actions)
+            {
+                try
+                {
+                    BuildMenu(action, globalContext, menuItems);
+                }
+                catch (Exception e)
+                {
+                    Debug.LogException(e);
+                }
+            }
+        }
+
+        public static void GetMenuEntries(IReadOnlyList<TrackAction> actions, List<MenuActionItem> menuItems)
+        {
+            var tracks = SelectionManager.SelectedTracks();
+            if (!tracks.Any())
+                return;
+
+            foreach (var action in actions)
+            {
+                try
+                {
+                    BuildMenu(action, tracks, menuItems);
+                }
+                catch (Exception e)
+                {
+                    Debug.LogException(e);
+                }
+            }
+        }
+
+        public static void GetMenuEntries(IReadOnlyList<ClipAction> actions, List<MenuActionItem> menuItems)
+        {
+            var clips = SelectionManager.SelectedClips();
+            bool any = clips.Any();
+            if (!clips.Any())
+                return;
+
+            foreach (var action in actions)
+            {
+                try
+                {
+                    if (action is EditSubTimeline editSubTimelineAction)
+                        editSubTimelineAction.AddMenuItem(menuItems);
+                    else if (any)
+                        BuildMenu(action, clips, menuItems);
+                }
+                catch (Exception e)
+                {
+                    Debug.LogException(e);
+                }
+            }
+        }
+
+        public static void GetMenuEntries(IReadOnlyList<MarkerAction> actions, List<MenuActionItem> menuItems)
+        {
+            var markers = SelectionManager.SelectedMarkers();
+            if (!markers.Any())
+                return;
+
+            foreach (var action in actions)
+            {
+                try
+                {
+                    BuildMenu(action, markers, menuItems);
+                }
+                catch (Exception e)
+                {
+                    Debug.LogException(e);
+                }
+            }
+        }
+
+        static void BuildMenu(TimelineAction action, ActionContext context, List<MenuActionItem> menuItems)
+        {
+            BuildMenu(action, action.Validate(context), () => ExecuteTimelineAction(action, context), menuItems);
+        }
+
+        static void BuildMenu(TrackAction action, IEnumerable<TrackAsset> tracks, List<MenuActionItem> menuItems)
+        {
+            BuildMenu(action, action.Validate(tracks), () => ExecuteTrackAction(action, tracks), menuItems);
+        }
+
+        static void BuildMenu(ClipAction action, IEnumerable<TimelineClip> clips, List<MenuActionItem> menuItems)
+        {
+            BuildMenu(action, action.Validate(clips), () => ExecuteClipAction(action, clips), menuItems);
+        }
+
+        static void BuildMenu(MarkerAction action, IEnumerable<IMarker> markers, List<MenuActionItem> menuItems)
+        {
+            BuildMenu(action, action.Validate(markers), () => ExecuteMarkerAction(action, markers), menuItems);
+        }
+
+        static void BuildMenu(IAction action, ActionValidity validity, GenericMenu.MenuFunction executeFunction, List<MenuActionItem> menuItems)
+        {
+            var menuAttribute = action.GetType().GetCustomAttribute<MenuEntryAttribute>(false);
+            if (menuAttribute == null)
+                return;
+
+            if (validity == ActionValidity.NotApplicable)
+                return;
+
+            var menuActionItem = new MenuActionItem
+            {
+                state = validity,
+                entryName = action.GetMenuEntryName(),
+                priority = menuAttribute.priority,
+                category = menuAttribute.subMenuPath,
+                isActiveInMode = action.IsActionActiveInMode(TimelineWindow.instance.currentMode.mode),
+                shortCut = action.GetShortcut(),
+                callback = executeFunction,
+                isChecked = action.IsChecked()
+            };
+            menuItems.Add(menuActionItem);
+        }
+
+        internal static void BuildMenu(GenericMenu menu, List<MenuActionItem> items)
+        {
+            // sorted the outer menu by priority, then sort the innermenu by priority
+            var sortedItems =
+                items.GroupBy(x => string.IsNullOrEmpty(x.category) ? x.entryName : x.category).OrderBy(x => x.Min(y => y.priority)).SelectMany(x => x.OrderBy(z => z.priority));
+
+            int lastPriority = Int32.MinValue;
+            string lastCategory = string.Empty;
+
+            foreach (var s in sortedItems)
+            {
+                if (s.state == ActionValidity.NotApplicable)
+                    continue;
+
+                var priority = s.priority;
+                if (lastPriority != int.MinValue && priority / MenuPriority.separatorAt > lastPriority / MenuPriority.separatorAt)
+                {
+                    string path = string.Empty;
+                    if (lastCategory == s.category)
+                        path = s.category;
+                    menu.AddSeparator(path);
+                }
+
+                lastPriority = priority;
+                lastCategory = s.category;
+
+                string entry = s.category + s.entryName;
+                if (!string.IsNullOrEmpty(s.shortCut))
+                    entry += " " + s.shortCut;
+
+                if (s.state == ActionValidity.Valid && s.isActiveInMode)
+                    menu.AddItem(new GUIContent(entry), s.isChecked, s.callback);
+                else
+                    menu.AddDisabledItem(new GUIContent(entry), s.isChecked);
+            }
+        }
+
+        public static bool HandleShortcut(Event evt)
+        {
+            if (EditorGUI.IsEditingTextField())
+                return false;
+
+            return HandleShortcut(evt, TimelineActionsWithShortcuts, (x) => ExecuteTimelineAction(x, TimelineEditor.CurrentContext())) ||
+                HandleShortcut(evt, ClipActionsWithShortcuts, (x => ExecuteClipAction(x, SelectionManager.SelectedClips()))) ||
+                HandleShortcut(evt, TrackActionsWithShortcuts, (x => ExecuteTrackAction(x, SelectionManager.SelectedTracks()))) ||
+                HandleShortcut(evt, MarkerActionsWithShortcuts, (x => ExecuteMarkerAction(x, SelectionManager.SelectedMarkers())));
+        }
+
+        public static bool HandleShortcut<T>(Event evt, IReadOnlyList<T> actions, Func<T, bool> invoke) where T : class, IAction
+        {
+            for (int i = 0; i < actions.Count; i++)
+            {
+                var action = actions[i];
+                var attr = action.GetType().GetCustomAttributes(typeof(ShortcutAttribute), true);
+
+                foreach (ShortcutAttribute shortcut in attr)
+                {
+                    if (shortcut.MatchesEvent(evt))
+                    {
+                        if (s_ShowActionTriggeredByShortcut)
+                            Debug.Log(action.GetType().Name);
+
+                        if (!action.IsActionActiveInMode(TimelineWindow.instance.currentMode.mode))
+                            continue;
+
+                        if (invoke(action))
+                            return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        public static bool ExecuteTimelineAction(TimelineAction timelineAction, ActionContext context)
+        {
+            if (timelineAction.Validate(context) == ActionValidity.Valid)
+            {
+                if (timelineAction.HasAutoUndo())
+                    UndoExtensions.RegisterContext(context, timelineAction.GetUndoName());
+                return timelineAction.Execute(context);
+            }
+            return false;
+        }
+
+        public static bool ExecuteTrackAction(TrackAction trackAction, IEnumerable<TrackAsset> tracks)
+        {
+            if (tracks != null && tracks.Any() && trackAction.Validate(tracks) == ActionValidity.Valid)
+            {
+                if (trackAction.HasAutoUndo())
+                    UndoExtensions.RegisterTracks(tracks, trackAction.GetUndoName());
+                return trackAction.Execute(tracks);
+            }
+            return false;
+        }
+
+        public static bool ExecuteClipAction(ClipAction clipAction, IEnumerable<TimelineClip> clips)
+        {
+            if (clips != null && clips.Any() && clipAction.Validate(clips) == ActionValidity.Valid)
+            {
+                if (clipAction.HasAutoUndo())
+                    UndoExtensions.RegisterClips(clips, clipAction.GetUndoName());
+                return clipAction.Execute(clips);
+            }
+            return false;
+        }
+
+        public static bool ExecuteMarkerAction(MarkerAction markerAction, IEnumerable<IMarker> markers)
+        {
+            if (markers != null && markers.Any() && markerAction.Validate(markers) == ActionValidity.Valid)
+            {
+                if (markerAction.HasAutoUndo())
+                    UndoExtensions.RegisterMarkers(markers, markerAction.GetUndoName());
+                return markerAction.Execute(markers);
+            }
+            return false;
+        }
+
+        static List<T> InstantiateClassesOfType<T>() where T : class
+        {
+            var typeCollection = TypeCache.GetTypesDerivedFrom(typeof(T));
+            var list = new List<T>(typeCollection.Count);
+            for (int i = 0; i < typeCollection.Count; i++)
+            {
+                if (typeCollection[i].IsAbstract || typeCollection[i].IsGenericType)
+                    continue;
+
+                if (typeCollection[i].GetConstructor(Type.EmptyTypes) == null)
+                {
+                    Debug.LogWarning($"{typeCollection[i].FullName} requires a default constructor to be automatically instantiated by Timeline");
+                    continue;
+                }
+
+                list.Add((T)Activator.CreateInstance(typeCollection[i]));
+            }
+            return list;
+        }
+
+        static List<T> ActionsWithShortCuts<T>(IReadOnlyList<T> list)
+        {
+            return list.Where(x => x.GetType().GetCustomAttributes(typeof(ShortcutAttribute), true).Length > 0).ToList();
+        }
+
+        static HashSet<System.Type> TypesWithAttribute<T>() where T : Attribute
+        {
+            var hashSet = new HashSet<System.Type>();
+            var typeCollection = TypeCache.GetTypesWithAttribute(typeof(T));
+            for (int i = 0; i < typeCollection.Count; i++)
+            {
+                hashSet.Add(typeCollection[i]);
+            }
+
+            return hashSet;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ActionManager.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ClipAction.cs

@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Base class for a clip action.
+    /// Inherit from this class to make an action that would react on selected clips after a menu click and/or a key shortcut.
+    /// </summary>
+    /// <example>
+    /// Simple Clip Action example (with context menu and shortcut support).
+    /// <code source="../../DocCodeExamples/ActionExamples.cs" region="declare-sampleClipAction" title="SampleClipAction"/>
+    /// </example>
+    /// <remarks>
+    /// To add an action as a menu item in the Timeline context menu, add <see cref="MenuEntryAttribute"/> on the action class.
+    /// To make an action to react to a shortcut, use the Shortcut Manager API with <see cref="TimelineShortcutAttribute"/>.
+    /// <seealso cref="UnityEditor.ShortcutManagement.ShortcutAttribute"/>
+    /// </remarks>
+    [ActiveInMode(TimelineModes.Default)]
+    public abstract class ClipAction : IAction
+    {
+        /// <summary>
+        /// Execute the action based on clips.
+        /// </summary>
+        /// <param name="clips">clips that the action will act on.</param>
+        /// <returns>Returns true if the action has been correctly executed, false otherwise.</returns>
+        public abstract bool Execute(IEnumerable<TimelineClip> clips);
+
+        /// <summary>
+        ///  Defines the validity of an Action for a given set of clips.
+        /// </summary>
+        ///  <param name="clips">The clips that the action will act on.</param>
+        /// <returns>The validity of the set of clips.</returns>
+        public abstract ActionValidity Validate(IEnumerable<TimelineClip> clips);
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ClipAction.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ClipsActions.cs

@@ -0,0 +1,392 @@
+using System.Collections.Generic;
+using System.Linq;
+using JetBrains.Annotations;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Timeline;
+using UnityEngine.Playables;
+
+namespace UnityEditor.Timeline
+{
+    [MenuEntry("Edit in Animation Window", MenuPriority.ClipEditActionSection.editInAnimationWindow), UsedImplicitly]
+    class EditClipInAnimationWindow : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            if (!GetEditableClip(clips, out _, out _))
+                return ActionValidity.NotApplicable;
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            TimelineClip clip;
+            AnimationClip clipToEdit;
+            if (!GetEditableClip(clips, out clip, out clipToEdit))
+                return false;
+
+            GameObject gameObject = null;
+            if (TimelineEditor.inspectedDirector != null)
+                gameObject = TimelineUtility.GetSceneGameObject(TimelineEditor.inspectedDirector, clip.GetParentTrack());
+
+            var timeController = TimelineAnimationUtilities.CreateTimeController(clip);
+            TimelineAnimationUtilities.EditAnimationClipWithTimeController(
+                clipToEdit, timeController, clip.animationClip != null ? gameObject : null);
+
+            return true;
+        }
+
+        private static bool GetEditableClip(IEnumerable<TimelineClip> clips, out TimelineClip clip, out AnimationClip animClip)
+        {
+            clip = null;
+            animClip = null;
+
+            if (clips.Count() != 1)
+                return false;
+
+            clip = clips.FirstOrDefault();
+            if (clip == null)
+                return false;
+
+            if (clip.animationClip != null)
+                animClip = clip.animationClip;
+            else if (clip.curves != null && !clip.curves.empty)
+                animClip = clip.curves;
+
+            return animClip != null;
+        }
+    }
+
+    [MenuEntry("Edit Sub-Timeline", MenuPriority.ClipEditActionSection.editSubTimeline), UsedImplicitly]
+    class EditSubTimeline : ClipAction
+    {
+        private static readonly string MultiItemPrefix = "Edit Sub-Timelines/";
+        private static readonly string SingleItemPrefix = "Edit ";
+
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            if (clips == null || clips.Count() != 1 || TimelineEditor.inspectedDirector == null)
+                return ActionValidity.NotApplicable;
+
+            var clip = clips.First();
+            var directors = TimelineUtility.GetSubTimelines(clip, TimelineEditor.inspectedDirector);
+            return directors.Any(x => x != null) ? ActionValidity.Valid : ActionValidity.NotApplicable;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            if (Validate(clips) != ActionValidity.Valid) return false;
+
+            var clip = clips.First();
+
+            var directors = TimelineUtility.GetSubTimelines(clip, TimelineEditor.inspectedDirector);
+            ExecuteInternal(directors, 0, clip);
+
+            return true;
+        }
+
+        static void ExecuteInternal(IList<PlayableDirector> directors, int directorIndex, TimelineClip clip)
+        {
+            SelectionManager.Clear();
+            TimelineWindow.instance.SetCurrentTimeline(directors[directorIndex], clip);
+        }
+
+        internal void AddMenuItem(List<MenuActionItem> menuItems)
+        {
+            var clips = TimelineEditor.selectedClips;
+            if (clips == null || clips.Length != 1)
+                return;
+
+            var mode = TimelineWindow.instance.currentMode.mode;
+            MenuEntryAttribute menuAttribute = GetType().GetCustomAttributes(typeof(MenuEntryAttribute), false).OfType<MenuEntryAttribute>().FirstOrDefault();
+            var menuItem = new MenuActionItem()
+            {
+                category = menuAttribute.subMenuPath ?? string.Empty,
+                entryName = menuAttribute.name,
+                isActiveInMode = this.IsActionActiveInMode(mode),
+                priority = menuAttribute.priority,
+                state = Validate(clips),
+                callback = null
+            };
+
+            var subDirectors = TimelineUtility.GetSubTimelines(clips[0], TimelineEditor.inspectedDirector);
+            if (subDirectors.Count == 1)
+            {
+                menuItem.entryName = SingleItemPrefix + DisplayNameHelper.GetDisplayName(subDirectors[0]);
+                menuItem.callback = () =>
+                {
+                    Execute(clips);
+                };
+                menuItems.Add(menuItem);
+            }
+            else
+            {
+                for (int i = 0; i < subDirectors.Count; i++)
+                {
+                    var index = i;
+                    menuItem.category = MultiItemPrefix;
+                    menuItem.entryName = DisplayNameHelper.GetDisplayName(subDirectors[i]);
+                    menuItem.callback = () =>
+                    {
+                        ExecuteInternal(subDirectors, index, clips[0]);
+                    };
+                    menuItems.Add(menuItem);
+                }
+            }
+        }
+    }
+
+    [MenuEntry("Editing/Trim Start", MenuPriority.ClipActionSection.trimStart)]
+    [Shortcut(Shortcuts.Clip.trimStart), UsedImplicitly]
+    class TrimStart : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            return clips.All(x => TimelineEditor.inspectedSequenceTime <= x.start || TimelineEditor.inspectedSequenceTime >= x.start + x.duration) ? ActionValidity.Invalid : ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.TrimStart(clips, TimelineEditor.inspectedSequenceTime);
+        }
+    }
+
+    [MenuEntry("Editing/Trim End", MenuPriority.ClipActionSection.trimEnd), UsedImplicitly]
+    [Shortcut(Shortcuts.Clip.trimEnd)]
+    class TrimEnd : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            return clips.All(x => TimelineEditor.inspectedSequenceTime <= x.start || TimelineEditor.inspectedSequenceTime >= x.start + x.duration) ? ActionValidity.Invalid : ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.TrimEnd(clips, TimelineEditor.inspectedSequenceTime);
+        }
+    }
+
+    [Shortcut(Shortcuts.Clip.split)]
+    [MenuEntry("Editing/Split", MenuPriority.ClipActionSection.split), UsedImplicitly]
+    class Split : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            return clips.All(x => TimelineEditor.inspectedSequenceTime <= x.start || TimelineEditor.inspectedSequenceTime >= x.start + x.duration) ? ActionValidity.Invalid : ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            bool success = ClipModifier.Split(clips, TimelineEditor.inspectedSequenceTime, TimelineEditor.inspectedDirector);
+            if (success)
+                TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+            return success;
+        }
+    }
+
+    [MenuEntry("Editing/Complete Last Loop", MenuPriority.ClipActionSection.completeLastLoop), UsedImplicitly]
+    class CompleteLastLoop : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.Any(TimelineHelpers.HasUsableAssetDuration);
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.CompleteLastLoop(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Trim Last Loop", MenuPriority.ClipActionSection.trimLastLoop), UsedImplicitly]
+    class TrimLastLoop : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.Any(TimelineHelpers.HasUsableAssetDuration);
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.TrimLastLoop(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Match Duration", MenuPriority.ClipActionSection.matchDuration), UsedImplicitly]
+    class MatchDuration : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            return clips.Count() > 1 ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.MatchDuration(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Double Speed", MenuPriority.ClipActionSection.doubleSpeed), UsedImplicitly]
+    class DoubleSpeed : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.All(x => x.SupportsSpeedMultiplier());
+
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.DoubleSpeed(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Half Speed", MenuPriority.ClipActionSection.halfSpeed), UsedImplicitly]
+    class HalfSpeed : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.All(x => x.SupportsSpeedMultiplier());
+
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.HalfSpeed(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Reset Duration", MenuPriority.ClipActionSection.resetDuration), UsedImplicitly]
+    class ResetDuration : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.Any(TimelineHelpers.HasUsableAssetDuration);
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.ResetEditing(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Reset Speed", MenuPriority.ClipActionSection.resetSpeed), UsedImplicitly]
+    class ResetSpeed : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.All(x => x.SupportsSpeedMultiplier());
+
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.ResetSpeed(clips);
+        }
+    }
+
+    [MenuEntry("Editing/Reset All", MenuPriority.ClipActionSection.resetAll), UsedImplicitly]
+    class ResetAll : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            bool canDisplay = clips.Any(TimelineHelpers.HasUsableAssetDuration) || clips.All(x => x.SupportsSpeedMultiplier());
+
+            return canDisplay ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            var speedResult = ClipModifier.ResetSpeed(clips);
+            var editResult = ClipModifier.ResetEditing(clips);
+            return speedResult || editResult;
+        }
+    }
+
+    [MenuEntry("Tile", MenuPriority.ClipActionSection.tile), UsedImplicitly]
+    class Tile : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            return clips.Count() > 1 ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            return ClipModifier.Tile(clips);
+        }
+    }
+
+    [MenuEntry("Find Source Asset", MenuPriority.ClipActionSection.findSourceAsset), UsedImplicitly]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class FindSourceAsset : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            if (clips.Count() > 1)
+                return ActionValidity.Invalid;
+
+            if (GetUnderlyingAsset(clips.First()) == null)
+                return ActionValidity.Invalid;
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            EditorGUIUtility.PingObject(GetUnderlyingAsset(clips.First()));
+            return true;
+        }
+
+        private static UnityEngine.Object GetExternalPlayableAsset(TimelineClip clip)
+        {
+            if (clip.asset == null)
+                return null;
+
+            if ((clip.asset.hideFlags & HideFlags.HideInHierarchy) != 0)
+                return null;
+
+            return clip.asset;
+        }
+
+        private static UnityEngine.Object GetUnderlyingAsset(TimelineClip clip)
+        {
+            var asset = clip.asset as ScriptableObject;
+            if (asset == null)
+                return null;
+
+            var fields = ObjectReferenceField.FindObjectReferences(asset.GetType());
+            if (fields.Length == 0)
+                return GetExternalPlayableAsset(clip);
+
+            // Find the first non-null field
+            foreach (var field in fields)
+            {
+                // skip scene refs in asset mode
+                if (TimelineEditor.inspectedDirector == null && field.isSceneReference)
+                    continue;
+                var obj = field.Find(asset, TimelineEditor.inspectedDirector);
+                if (obj != null)
+                    return obj;
+            }
+
+            return GetExternalPlayableAsset(clip);
+        }
+    }
+
+    class CopyClipsToClipboard : ClipAction
+    {
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips) => ActionValidity.Valid;
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            TimelineEditor.clipboard.CopyItems(clips.ToItems());
+            return true;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/ClipsActions.cs.meta

@@ -0,0 +1,11 @@
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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/IAction.cs

@@ -0,0 +1,123 @@
+using System;
+using System.ComponentModel;
+using System.Linq;
+using System.Reflection;
+using UnityEditor.ShortcutManagement;
+using UnityEngine;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// interface indicating an Action class
+    interface IAction { }
+
+    /// extension methods for IActions
+    static class ActionExtensions
+    {
+        const string kActionPostFix = "Action";
+
+        public static string GetUndoName(this IAction action)
+        {
+            if (action == null)
+                throw new ArgumentNullException(nameof(action));
+
+            var attr = action.GetType().GetCustomAttribute<ApplyDefaultUndoAttribute>(false);
+            if (attr != null && !string.IsNullOrWhiteSpace(attr.UndoTitle))
+                return attr.UndoTitle;
+
+            return action.GetDisplayName();
+        }
+
+        public static string GetMenuEntryName(this IAction action)
+        {
+            var menuAction = action as IMenuName;
+            if (menuAction != null && !string.IsNullOrWhiteSpace(menuAction.menuName))
+                return menuAction.menuName;
+
+            var attr = action.GetType().GetCustomAttribute<MenuEntryAttribute>(false);
+            if (attr != null && !string.IsNullOrWhiteSpace(attr.name))
+                return attr.name;
+
+            return action.GetDisplayName();
+        }
+
+        public static string GetDisplayName(this IAction action)
+        {
+            if (action == null)
+                throw new ArgumentNullException(nameof(action));
+
+            var attr = action.GetType().GetCustomAttribute<DisplayNameAttribute>(false);
+            if (attr != null && !string.IsNullOrEmpty(attr.DisplayName))
+                return attr.DisplayName;
+
+            var name = action.GetType().Name;
+            if (name.EndsWith(kActionPostFix))
+                return ObjectNames.NicifyVariableName(name.Substring(0, name.Length - kActionPostFix.Length));
+
+            return ObjectNames.NicifyVariableName(name);
+        }
+
+        public static bool HasAutoUndo(this IAction action)
+        {
+            return action != null && ActionManager.ActionsWithAutoUndo.Contains(action.GetType());
+        }
+
+        public static bool IsChecked(this IAction action)
+        {
+            return (action is IMenuChecked menuAction) && menuAction.isChecked;
+        }
+
+        public static bool IsActionActiveInMode(this IAction action, TimelineModes mode)
+        {
+            var attr = action.GetType().GetCustomAttribute<ActiveInModeAttribute>(true);
+            return attr != null && (attr.modes & mode) != 0;
+        }
+
+        public static string GetShortcut(this IAction action)
+        {
+            if (action == null)
+                throw new ArgumentNullException(nameof(action));
+
+            var shortcutAttribute = GetShortcutAttributeForAction(action);
+            var shortCut = shortcutAttribute == null ? string.Empty : shortcutAttribute.GetMenuShortcut();
+            if (string.IsNullOrWhiteSpace(shortCut))
+            {
+                //Check if there is a static method with attribute
+                var customShortcutMethod = action.GetType().GetMethods().FirstOrDefault(m => m.GetCustomAttribute<TimelineShortcutAttribute>(true) != null);
+                if (customShortcutMethod != null)
+                {
+                    var shortcutId = customShortcutMethod.GetCustomAttribute<TimelineShortcutAttribute>(true).identifier;
+                    var shortcut = ShortcutIntegration.instance.directory.FindShortcutEntry(shortcutId);
+                    if (shortcut != null && shortcut.combinations.Any())
+                        shortCut = KeyCombination.SequenceToMenuString(shortcut.combinations);
+                }
+            }
+
+            return shortCut;
+        }
+
+        static ShortcutAttribute GetShortcutAttributeForAction(this IAction action)
+        {
+            if (action == null)
+                throw new ArgumentNullException(nameof(action));
+
+            var shortcutAttributes = action.GetType()
+                .GetCustomAttributes(typeof(ShortcutAttribute), true)
+                .Cast<ShortcutAttribute>();
+
+            foreach (var shortcutAttribute in shortcutAttributes)
+            {
+                if (shortcutAttribute is ShortcutPlatformOverrideAttribute shortcutOverride)
+                {
+                    if (shortcutOverride.MatchesCurrentPlatform())
+                        return shortcutOverride;
+                }
+                else
+                {
+                    return shortcutAttribute;
+                }
+            }
+
+            return null;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/IAction.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/IMenuChecked.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace UnityEditor.Timeline
+{
+    interface IMenuChecked
+    {
+        bool isChecked { get; }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/IMenuChecked.cs.meta

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+timeCreated: 1591130283

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/IMenuName.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace UnityEditor.Timeline
+{
+    interface IMenuName
+    {
+        string menuName { get; }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/IMenuName.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Invoker.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Class containing methods to invoke actions.
+    /// </summary>
+    public static class Invoker
+    {
+        /// <summary>
+        /// Execute a given action with a context parameter.
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        /// <param name="context">Context for the action.</param>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool Invoke<T>(this ActionContext context) where T : TimelineAction
+        {
+            var action = ActionManager.TimelineActions.GetCachedAction<T, TimelineAction>();
+            return ActionManager.ExecuteTimelineAction(action, context);
+        }
+
+        /// <summary>
+        /// Execute a given action with tracks
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        ///  <param name="tracks">Tracks that the action will act on.</param>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool Invoke<T>(this IEnumerable<TrackAsset> tracks) where T : TrackAction
+        {
+            var action = ActionManager.TrackActions.GetCachedAction<T, TrackAction>();
+            return ActionManager.ExecuteTrackAction(action, tracks);
+        }
+
+        /// <summary>
+        /// Execute a given action with clips
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        ///  <param name="clips">Clips that the action will act on.</param>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool Invoke<T>(this IEnumerable<TimelineClip> clips) where T : ClipAction
+        {
+            var action = ActionManager.ClipActions.GetCachedAction<T, ClipAction>();
+            return ActionManager.ExecuteClipAction(action, clips);
+        }
+
+        /// <summary>
+        /// Execute a given action with markers
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        /// <param name="markers">Markers that the action will act on.</param>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool Invoke<T>(this IEnumerable<IMarker> markers) where T : MarkerAction
+        {
+            var action = ActionManager.MarkerActions.GetCachedAction<T, MarkerAction>();
+            return ActionManager.ExecuteMarkerAction(action, markers);
+        }
+
+        /// <summary>
+        /// Execute a given timeline action with the selected clips, tracks and markers.
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool InvokeWithSelected<T>() where T : TimelineAction
+        {
+            return Invoke<T>(TimelineEditor.CurrentContext());
+        }
+
+        /// <summary>
+        /// Execute a given clip action with the selected clips.
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool InvokeWithSelectedClips<T>() where T : ClipAction
+        {
+            return Invoke<T>(SelectionManager.SelectedClips());
+        }
+
+        /// <summary>
+        /// Execute a given track action with the selected tracks.
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool InvokeWithSelectedTracks<T>() where T : TrackAction
+        {
+            return Invoke<T>(SelectionManager.SelectedTracks());
+        }
+
+        /// <summary>
+        /// Execute a given marker action with the selected markers.
+        /// </summary>
+        /// <typeparam name="T">Action type to execute.</typeparam>
+        /// <returns>True if the action has been executed, false otherwise.</returns>
+        public static bool InvokeWithSelectedMarkers<T>() where T : MarkerAction
+        {
+            return Invoke<T>(SelectionManager.SelectedMarkers());
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Invoker.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/MarkerAction.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Base class for a marker action.
+    /// Inherit from this class to make an action that would react on selected markers after a menu click and/or a key shortcut.
+    /// </summary>
+    /// <example>
+    /// Simple track Action example (with context menu and shortcut support).
+    /// <code source="../../DocCodeExamples/ActionExamples.cs" region="declare-sampleMarkerAction" title="SampleMarkerAction"/>
+    /// </example>
+    /// <remarks>
+    /// To add an action as a menu item in the Timeline context menu, add <see cref="MenuEntryAttribute"/> on the action class.
+    /// To make an action to react to a shortcut, use the Shortcut Manager API with <see cref="TimelineShortcutAttribute"/>.
+    /// <seealso cref="UnityEditor.ShortcutManagement.ShortcutAttribute"/>
+    /// </remarks>
+    [ActiveInMode(TimelineModes.Default)]
+    public abstract class MarkerAction : IAction
+    {
+        /// <summary>
+        ///  Execute the action.
+        /// </summary>
+        /// <param name="markers">Markers that will be used for the action. </param>
+        /// <returns>true if the action has been executed. false otherwise</returns>
+        public abstract bool Execute(IEnumerable<IMarker> markers);
+        /// <summary>
+        ///  Defines the validity of an Action for a given set of markers.
+        /// </summary>
+        /// <param name="markers">Markers that will be used for the action. </param>
+        /// <returns>The validity of the set of markers.</returns>
+        public abstract ActionValidity Validate(IEnumerable<IMarker> markers);
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/MarkerAction.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/MarkerActions.cs

@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+using JetBrains.Annotations;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [UsedImplicitly]
+    class CopyMarkersToClipboard : MarkerAction
+    {
+        public override ActionValidity Validate(IEnumerable<IMarker> markers) => ActionValidity.Valid;
+
+        public override bool Execute(IEnumerable<IMarker> markers)
+        {
+            TimelineEditor.clipboard.CopyItems(markers.ToItems());
+            return true;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/MarkerActions.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Menus.meta

@@ -0,0 +1,8 @@
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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Menus/MenuItemActionBase.cs

@@ -0,0 +1,36 @@
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Indicates the validity of an action for a given data set.
+    /// </summary>
+    public enum ActionValidity
+    {
+        /// <summary>
+        /// Action is valid in the provided context.
+        /// If the action is linked to a menu item, the menu item will be visible.
+        /// </summary>
+        Valid,
+        /// <summary>
+        /// Action is not applicable in the current context.
+        /// If the action is linked to a menu item, the menu item will not be shown.
+        /// </summary>
+        NotApplicable,
+        /// <summary>
+        /// Action is not valid in the current context.
+        /// If the action is linked to a menu item, the menu item will be shown but grayed out.
+        /// </summary>
+        Invalid
+    }
+
+    struct MenuActionItem
+    {
+        public string category;
+        public string entryName;
+        public string shortCut;
+        public int priority;
+        public bool isActiveInMode;
+        public ActionValidity state;
+        public bool isChecked;
+        public GenericMenu.MenuFunction callback;
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Menus/MenuItemActionBase.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Menus/TimelineContextMenu.cs

@@ -0,0 +1,381 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Timeline;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    static class SequencerContextMenu
+    {
+        static class Styles
+        {
+            public static readonly string addItemFromAssetTemplate = L10n.Tr("Add {0} From {1}");
+            public static readonly string addSingleItemFromAssetTemplate = L10n.Tr("Add From {1}");
+            public static readonly string addItemTemplate = L10n.Tr("Add {0}");
+            public static readonly string typeSelectorTemplate = L10n.Tr("Select {0}");
+            public static readonly string trackGroup = L10n.Tr("Track Group");
+            public static readonly string trackSubGroup = L10n.Tr("Track Sub-Group");
+            public static readonly string addTrackLayer = L10n.Tr("Add Layer");
+            public static readonly string layerName = L10n.Tr("Layer {0}");
+        }
+
+        public static void ShowNewTracksContextMenu(ICollection<TrackAsset> tracks, WindowState state)
+        {
+            var menu = new GenericMenu();
+            List<MenuActionItem> items = new List<MenuActionItem>(100);
+            BuildNewTracksContextMenu(items, tracks, state);
+            ActionManager.BuildMenu(menu, items);
+            menu.ShowAsContext();
+        }
+
+        public static void ShowNewTracksContextMenu(ICollection<TrackAsset> tracks, WindowState state, Rect rect)
+        {
+            var menu = new GenericMenu();
+            List<MenuActionItem> items = new List<MenuActionItem>(100);
+            BuildNewTracksContextMenu(items, tracks, state);
+            ActionManager.BuildMenu(menu, items);
+            menu.DropDown(rect);
+        }
+
+        public static void ShowTrackContextMenu(Vector2? mousePosition)
+        {
+            var items = new List<MenuActionItem>();
+            var menu = new GenericMenu();
+            BuildTrackContextMenu(items, mousePosition);
+            ActionManager.BuildMenu(menu, items);
+            menu.ShowAsContext();
+        }
+
+        public static void ShowItemContextMenu(Vector2 mousePosition)
+        {
+            var menu = new GenericMenu();
+            var items = new List<MenuActionItem>();
+            BuildItemContextMenu(items, mousePosition);
+            ActionManager.BuildMenu(menu, items);
+            menu.ShowAsContext();
+        }
+
+        public static void BuildItemContextMenu(List<MenuActionItem> items, Vector2 mousePosition)
+        {
+            ActionManager.GetMenuEntries(ActionManager.TimelineActions, mousePosition, items);
+            ActionManager.GetMenuEntries(ActionManager.ClipActions, items);
+            ActionManager.GetMenuEntries(ActionManager.MarkerActions, items);
+
+            var clips = TimelineEditor.selectedClips;
+            if (clips.Length > 0)
+                AddMarkerMenuCommands(items, clips.Select(c => c.GetParentTrack()).Distinct().ToList(), TimelineHelpers.GetCandidateTime(mousePosition));
+        }
+
+        public static void BuildNewTracksContextMenu(List<MenuActionItem> menuItems, ICollection<TrackAsset> parentTracks, WindowState state, string format = null)
+        {
+            if (parentTracks == null)
+                parentTracks = new TrackAsset[0];
+
+            if (string.IsNullOrEmpty(format))
+                format = "{0}";
+
+            // Add Group or SubGroup
+            var title = string.Format(format, parentTracks.Any(t => t != null) ? Styles.trackSubGroup : Styles.trackGroup);
+            var menuState = ActionValidity.Valid;
+            if (state.editSequence.isReadOnly)
+                menuState = ActionValidity.Invalid;
+            if (parentTracks.Any() && parentTracks.Any(t => t != null && t.lockedInHierarchy))
+                menuState = ActionValidity.Invalid;
+
+            GenericMenu.MenuFunction command = () =>
+            {
+                SelectionManager.Clear();
+                if (parentTracks.Count == 0)
+                    Selection.Add(TimelineHelpers.CreateTrack<GroupTrack>(null, title));
+
+                foreach (var parentTrack in parentTracks)
+                    Selection.Add(TimelineHelpers.CreateTrack<GroupTrack>(parentTrack, title));
+
+                TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+            };
+
+            menuItems.Add(
+                new MenuActionItem()
+                {
+                    category = string.Empty,
+                    entryName = title,
+                    isActiveInMode = true,
+                    priority = MenuPriority.AddItem.addGroup,
+                    state = menuState,
+                    isChecked = false,
+                    callback = command
+                }
+            );
+
+
+            var allTypes = TypeUtility.AllTrackTypes().Where(x => x != typeof(GroupTrack) && !TypeUtility.IsHiddenInMenu(x)).ToList();
+
+            int builtInPriority = MenuPriority.AddItem.addTrack;
+            int customPriority = MenuPriority.AddItem.addCustomTrack;
+            foreach (var trackType in allTypes)
+            {
+                var trackItemType = trackType;
+
+                command = () =>
+                {
+                    SelectionManager.Clear();
+
+                    if (parentTracks.Count == 0)
+                        SelectionManager.Add(TimelineHelpers.CreateTrack((Type)trackItemType, null));
+
+                    foreach (var parentTrack in parentTracks)
+                        SelectionManager.Add(TimelineHelpers.CreateTrack((Type)trackItemType, parentTrack));
+                };
+
+                menuItems.Add(
+                    new MenuActionItem()
+                    {
+                        category = TimelineHelpers.GetTrackCategoryName(trackType),
+                        entryName = string.Format(format, TimelineHelpers.GetTrackMenuName(trackItemType)),
+                        isActiveInMode = true,
+                        priority = TypeUtility.IsBuiltIn(trackType) ? builtInPriority++ : customPriority++,
+                        state = menuState,
+                        callback = command
+                    }
+                );
+            }
+        }
+
+        public static void BuildTrackContextMenu(List<MenuActionItem> items, Vector2? mousePosition)
+        {
+            var tracks = SelectionManager.SelectedTracks().ToArray();
+            if (tracks.Length == 0)
+                return;
+
+            ActionManager.GetMenuEntries(ActionManager.TimelineActions, mousePosition, items);
+            ActionManager.GetMenuEntries(ActionManager.TrackActions, items);
+            AddLayeredTrackCommands(items, tracks);
+
+            var first = tracks.First().GetType();
+            var allTheSame = tracks.All(t => t.GetType() == first);
+            if (allTheSame)
+            {
+                if (first != typeof(GroupTrack))
+                {
+                    var candidateTime = TimelineHelpers.GetCandidateTime(mousePosition, tracks);
+                    AddClipMenuCommands(items, tracks, candidateTime);
+                    AddMarkerMenuCommands(items, tracks, candidateTime);
+                }
+                else
+                {
+                    BuildNewTracksContextMenu(items, tracks, TimelineWindow.instance.state, Styles.addItemTemplate);
+                }
+            }
+        }
+
+        static void AddLayeredTrackCommands(List<MenuActionItem> menuItems, ICollection<TrackAsset> tracks)
+        {
+            if (tracks.Count == 0)
+                return;
+
+            var layeredType = tracks.First().GetType();
+            // animation tracks have a special menu.
+            if (layeredType == typeof(AnimationTrack))
+                return;
+
+            // must implement ILayerable
+            if (!typeof(UnityEngine.Timeline.ILayerable).IsAssignableFrom(layeredType))
+                return;
+
+            if (tracks.Any(t => t.GetType() != layeredType))
+                return;
+
+            // only supported on the master track no nesting.
+            if (tracks.Any(t => t.isSubTrack))
+                return;
+
+            var enabled = tracks.All(t => t != null && !t.lockedInHierarchy) && !TimelineWindow.instance.state.editSequence.isReadOnly;
+            int priority = MenuPriority.AddTrackMenu.addLayerTrack;
+            GenericMenu.MenuFunction menuCallback = () =>
+            {
+                foreach (var track in tracks)
+                    TimelineHelpers.CreateTrack(layeredType, track, string.Format(Styles.layerName, track.GetChildTracks().Count() + 1));
+            };
+
+            var entryName = Styles.addTrackLayer;
+            menuItems.Add(
+                new MenuActionItem()
+                {
+                    category = string.Empty,
+                    entryName = entryName,
+                    isActiveInMode = true,
+                    priority = priority++,
+                    state = enabled ? ActionValidity.Valid : ActionValidity.Invalid,
+                    callback = menuCallback
+                }
+            );
+        }
+
+        static void AddClipMenuCommands(List<MenuActionItem> menuItems, ICollection<TrackAsset> tracks, double candidateTime)
+        {
+            if (!tracks.Any())
+                return;
+
+            var trackAsset = tracks.First();
+            var trackType = trackAsset.GetType();
+            if (tracks.Any(t => t.GetType() != trackType))
+                return;
+
+            var enabled = tracks.All(t => t != null && !t.lockedInHierarchy) && !TimelineWindow.instance.state.editSequence.isReadOnly;
+            var assetTypes = TypeUtility.GetPlayableAssetsHandledByTrack(trackType);
+            var visibleAssetTypes = TypeUtility.GetVisiblePlayableAssetsHandledByTrack(trackType);
+
+            // skips the name if there is only a single type
+            var commandNameTemplate = assetTypes.Count() == 1 ? Styles.addSingleItemFromAssetTemplate : Styles.addItemFromAssetTemplate;
+            int builtInPriority = MenuPriority.AddItem.addClip;
+            int customPriority = MenuPriority.AddItem.addCustomClip;
+            foreach (var assetType in assetTypes)
+            {
+                var assetItemType = assetType;
+                var category = TimelineHelpers.GetItemCategoryName(assetType);
+                Action<Object> onObjectChanged = obj =>
+                {
+                    if (obj != null)
+                    {
+                        foreach (var t in tracks)
+                        {
+                            TimelineHelpers.CreateClipOnTrack(assetItemType, obj, t, candidateTime);
+                        }
+                    }
+                };
+
+                foreach (var objectReference in TypeUtility.ObjectReferencesForType(assetType))
+                {
+                    var isSceneReference = objectReference.isSceneReference;
+                    var dataType = objectReference.type;
+                    GenericMenu.MenuFunction menuCallback = () =>
+                    {
+                        ObjectSelector.get.Show(null, dataType, null, isSceneReference, null, (obj) => onObjectChanged(obj), null);
+                        ObjectSelector.get.titleContent = EditorGUIUtility.TrTextContent(string.Format(Styles.typeSelectorTemplate, TypeUtility.GetDisplayName(dataType)));
+                    };
+
+                    menuItems.Add(
+                        new MenuActionItem()
+                        {
+                            category = category,
+                            entryName = string.Format(commandNameTemplate, TypeUtility.GetDisplayName(assetType), TypeUtility.GetDisplayName(objectReference.type)),
+                            isActiveInMode = true,
+                            priority = TypeUtility.IsBuiltIn(assetType) ? builtInPriority++ : customPriority++,
+                            state = enabled ? ActionValidity.Valid : ActionValidity.Invalid,
+                            callback = menuCallback
+                        }
+                    );
+                }
+            }
+
+            foreach (var assetType in visibleAssetTypes)
+            {
+                var assetItemType = assetType;
+                var category = TimelineHelpers.GetItemCategoryName(assetType);
+                var commandName = string.Format(Styles.addItemTemplate, TypeUtility.GetDisplayName(assetType));
+                GenericMenu.MenuFunction command = () =>
+                {
+                    foreach (var t in tracks)
+                    {
+                        TimelineHelpers.CreateClipOnTrack(assetItemType, t, candidateTime);
+                    }
+                };
+
+                menuItems.Add(
+                    new MenuActionItem()
+                    {
+                        category = category,
+                        entryName = commandName,
+                        isActiveInMode = true,
+                        priority = TypeUtility.IsBuiltIn(assetItemType) ? builtInPriority++ : customPriority++,
+                        state = enabled ? ActionValidity.Valid : ActionValidity.Invalid,
+                        callback = command
+                    }
+                );
+            }
+        }
+
+        static void AddMarkerMenuCommands(List<MenuActionItem> menu, IEnumerable<Type> markerTypes, Action<Type, Object> addMarkerCommand, bool enabled)
+        {
+            int builtInPriority = MenuPriority.AddItem.addMarker;
+            int customPriority = MenuPriority.AddItem.addCustomMarker;
+            foreach (var markerType in markerTypes)
+            {
+                var markerItemType = markerType;
+                string category = TimelineHelpers.GetItemCategoryName(markerItemType);
+                menu.Add(
+                    new MenuActionItem()
+                    {
+                        category = category,
+                        entryName = string.Format(Styles.addItemTemplate, TypeUtility.GetDisplayName(markerType)),
+                        isActiveInMode = true,
+                        priority = TypeUtility.IsBuiltIn(markerType) ? builtInPriority++ : customPriority++,
+                        state = enabled ? ActionValidity.Valid : ActionValidity.Invalid,
+                        callback = () => addMarkerCommand(markerItemType, null)
+                    }
+                );
+
+                foreach (var objectReference in TypeUtility.ObjectReferencesForType(markerType))
+                {
+                    var isSceneReference = objectReference.isSceneReference;
+                    GenericMenu.MenuFunction menuCallback = () =>
+                    {
+                        Type assetDataType = objectReference.type;
+                        ObjectSelector.get.titleContent = EditorGUIUtility.TrTextContent(string.Format(Styles.typeSelectorTemplate, TypeUtility.GetDisplayName(assetDataType)));
+                        ObjectSelector.get.Show(null, assetDataType, null, isSceneReference, null, obj =>
+                        {
+                            if (obj != null)
+                                addMarkerCommand(markerItemType, obj);
+                        }, null);
+                    };
+
+                    menu.Add(
+                        new MenuActionItem
+                        {
+                            category = TimelineHelpers.GetItemCategoryName(markerItemType),
+                            entryName = string.Format(Styles.addItemFromAssetTemplate, TypeUtility.GetDisplayName(markerType), TypeUtility.GetDisplayName(objectReference.type)),
+                            isActiveInMode = true,
+                            priority = TypeUtility.IsBuiltIn(markerType) ? builtInPriority++ : customPriority++,
+                            state = enabled ? ActionValidity.Valid : ActionValidity.Invalid,
+                            callback = menuCallback
+                        }
+                    );
+                }
+            }
+        }
+
+        static void AddMarkerMenuCommands(List<MenuActionItem> menuItems, ICollection<TrackAsset> tracks, double candidateTime)
+        {
+            if (tracks.Count == 0)
+                return;
+
+            var enabled = tracks.All(t => !t.lockedInHierarchy) && !TimelineWindow.instance.state.editSequence.isReadOnly;
+            var addMarkerCommand = new Action<Type, Object>((type, obj) => AddMarkersCallback(tracks, type, candidateTime, obj));
+
+            AddMarkerMenuCommands(menuItems, tracks, addMarkerCommand, enabled);
+        }
+
+        static void AddMarkerMenuCommands(List<MenuActionItem> menuItems, ICollection<TrackAsset> tracks, Action<Type, Object> command, bool enabled)
+        {
+            var markerTypes = TypeUtility.GetBuiltInMarkerTypes().Union(TypeUtility.GetUserMarkerTypes());
+            if (tracks != null)
+                markerTypes = markerTypes.Where(x => tracks.All(track => (track == null) || TypeUtility.DoesTrackSupportMarkerType(track, x))); // null track indicates marker track to be created
+
+            AddMarkerMenuCommands(menuItems, markerTypes, command, enabled);
+        }
+
+        static void AddMarkersCallback(ICollection<TrackAsset> targets, Type markerType, double time, Object obj)
+        {
+            SelectionManager.Clear();
+            foreach (var target in targets)
+            {
+                var marker = TimelineHelpers.CreateMarkerOnTrack(markerType, obj, target, time);
+                SelectionManager.Add(marker);
+            }
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/Menus/TimelineContextMenu.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: de86b4ed8106fd84a8bc2f5d69798d53
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TimelineAction.cs

@@ -0,0 +1,34 @@
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Base class for a timeline action.
+    /// Inherit from this class to make an action on a timeline after a menu click and/or a key shortcut.
+    /// </summary>
+    /// <remarks>
+    /// To add an action as a menu item in the Timeline context menu, add <see cref="MenuEntryAttribute"/> on the action class.
+    /// To make an action to react to a shortcut, use the Shortcut Manager API with <see cref="TimelineShortcutAttribute"/>.
+    /// <seealso cref="UnityEditor.ShortcutManagement.ShortcutAttribute"/>
+    /// <seealso cref="ActiveInModeAttribute"/>
+    /// </remarks>
+    /// <example>
+    /// Simple Timeline Action example (with context menu and shortcut support).
+    /// <code source="../../DocCodeExamples/ActionExamples.cs" region="declare-sampleTimelineAction" title="SampleTimelineAction"/>
+    /// </example>
+    [ActiveInMode(TimelineModes.Default)]
+    public abstract class TimelineAction : IAction
+    {
+        /// <summary>
+        ///  Execute the action.
+        /// </summary>
+        /// <param name="context">Context for the action.</param>
+        /// <returns>true if the action has been executed. false otherwise</returns>
+        public abstract bool Execute(ActionContext context);
+
+        /// <summary>
+        /// Defines the validity of an Action based on the context.
+        /// </summary>
+        /// <param name="context">Context for the action.</param>
+        /// <returns>Visual state of the menu for the action.</returns>
+        public abstract ActionValidity Validate(ActionContext context);
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TimelineAction.cs.meta

@@ -0,0 +1,11 @@
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+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TimelineActions.cs

@@ -0,0 +1,970 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.ShortcutManagement;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [MenuEntry("Copy", MenuPriority.TimelineActionSection.copy)]
+    [Shortcut("Main Menu/Edit/Copy", EventCommandNames.Copy)]
+    class CopyAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context)
+        {
+            if (SelectionManager.Count() == 0)
+                return ActionValidity.NotApplicable;
+            if (context.tracks.ContainsTimelineMarkerTrack(context.timeline))
+                return ActionValidity.NotApplicable;
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(ActionContext context)
+        {
+            TimelineEditor.clipboard.Clear();
+
+            var clips = context.clips;
+            if (clips.Any())
+            {
+                clips.Invoke<CopyClipsToClipboard>();
+            }
+            var markers = context.markers;
+            if (markers.Any())
+            {
+                markers.Invoke<CopyMarkersToClipboard>();
+            }
+            var tracks = context.tracks;
+            if (tracks.Any())
+            {
+                CopyTracksToClipboard.Do(tracks.ToArray());
+            }
+
+            return true;
+        }
+    }
+
+    [MenuEntry("Paste", MenuPriority.TimelineActionSection.paste)]
+    [Shortcut("Main Menu/Edit/Paste", EventCommandNames.Paste)]
+    class PasteAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context)
+        {
+            return CanPaste(context.invocationTime) ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(ActionContext context)
+        {
+            if (!CanPaste(context.invocationTime))
+                return false;
+
+            PasteItems(context.invocationTime);
+            PasteTracks();
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+            return true;
+        }
+
+        static bool CanPaste(double? invocationTime)
+        {
+            var copiedItems = TimelineEditor.clipboard.GetCopiedItems().ToList();
+
+            if (!copiedItems.Any())
+                return TimelineEditor.clipboard.GetTracks().Any();
+
+            return CanPasteItems(copiedItems, invocationTime);
+        }
+
+        static bool CanPasteItems(ICollection<ItemsPerTrack> itemsGroups, double? invocationTime)
+        {
+            var hasItemsCopiedFromMultipleTracks = itemsGroups.Count > 1;
+            var allItemsCopiedFromCurrentAsset = itemsGroups.All(x => x.targetTrack.timelineAsset == TimelineEditor.inspectedAsset);
+            var hasUsedShortcut = invocationTime == null;
+            var anySourceLocked = itemsGroups.Any(x => x.targetTrack != null && x.targetTrack.lockedInHierarchy);
+
+            var targetTrack = GetPickedTrack();
+            if (targetTrack == null)
+                targetTrack = SelectionManager.SelectedTracks().FirstOrDefault();
+
+            //do not paste if the user copied items from another timeline
+            //if the copied items comes from > 1 track (since we do not know where to paste the copied items)
+            //or if a keyboard shortcut was used (since the user will not see the paste result)
+            if (!allItemsCopiedFromCurrentAsset)
+            {
+                var isSelectedTrackInCurrentAsset = targetTrack != null && targetTrack.timelineAsset == TimelineEditor.inspectedAsset;
+                if (hasItemsCopiedFromMultipleTracks || (hasUsedShortcut && !isSelectedTrackInCurrentAsset))
+                    return false;
+            }
+
+            // pasting to items to their source track, if items from multiple tracks are selected
+            // and no track is in the selection items will each be pasted to their respective track.
+            if (targetTrack == null || itemsGroups.All(x => x.targetTrack == targetTrack))
+                return !anySourceLocked;
+
+            if (hasItemsCopiedFromMultipleTracks)
+            {
+                //do not paste if the track which received the paste action does not contain a copied clip
+                return !anySourceLocked && itemsGroups.Select(x => x.targetTrack).Contains(targetTrack);
+            }
+
+            var copiedItems = itemsGroups.SelectMany(i => i.items);
+            return IsTrackValidForItems(targetTrack, copiedItems);
+        }
+
+        static void PasteItems(double? invocationTime)
+        {
+            var copiedItems = TimelineEditor.clipboard.GetCopiedItems().ToList();
+            var numberOfUniqueParentsInClipboard = copiedItems.Count();
+
+            if (numberOfUniqueParentsInClipboard == 0) return;
+            List<ITimelineItem> newItems;
+
+            //if the copied items were on a single parent, then use the mouse position to get the parent OR the original parent
+            if (numberOfUniqueParentsInClipboard == 1)
+            {
+                var itemsGroup = copiedItems.First();
+                TrackAsset target = null;
+                if (invocationTime.HasValue)
+                    target = GetPickedTrack();
+                if (target == null)
+                    target = FindSuitableParentForSingleTrackPasteWithoutMouse(itemsGroup);
+
+                var candidateTime = invocationTime ?? TimelineHelpers.GetCandidateTime(null, target);
+                newItems = TimelineHelpers.DuplicateItemsUsingCurrentEditMode(TimelineEditor.clipboard.exposedPropertyTable, TimelineEditor.inspectedDirector, itemsGroup, target, candidateTime, "Paste Items").ToList();
+            }
+            //if copied items were on multiple parents, then the destination parents are the same as the original parents
+            else
+            {
+                var time = invocationTime ?? TimelineHelpers.GetCandidateTime(null, copiedItems.Select(c => c.targetTrack).ToArray());
+                newItems = TimelineHelpers.DuplicateItemsUsingCurrentEditMode(TimelineEditor.clipboard.exposedPropertyTable, TimelineEditor.inspectedDirector, copiedItems, time, "Paste Items").ToList();
+            }
+
+            TimelineHelpers.FrameItems(newItems);
+            SelectionManager.RemoveTimelineSelection();
+            foreach (var item in newItems)
+            {
+                SelectionManager.Add(item);
+            }
+        }
+
+        static TrackAsset FindSuitableParentForSingleTrackPasteWithoutMouse(ItemsPerTrack itemsGroup)
+        {
+            var groupParent = itemsGroup.targetTrack; //set a main parent in the clipboard
+            var selectedTracks = SelectionManager.SelectedTracks();
+
+            if (selectedTracks.Contains(groupParent))
+            {
+                return groupParent;
+            }
+
+            //find a selected track suitable for all items
+            var itemsToPaste = itemsGroup.items;
+            var compatibleTrack = selectedTracks.FirstOrDefault(t => IsTrackValidForItems(t, itemsToPaste));
+            return compatibleTrack != null ? compatibleTrack : groupParent;
+        }
+
+        static bool IsTrackValidForItems(TrackAsset track, IEnumerable<ITimelineItem> items)
+        {
+            if (track == null || track.lockedInHierarchy) return false;
+            return items.All(i => i.IsCompatibleWithTrack(track));
+        }
+
+        static TrackAsset GetPickedTrack()
+        {
+            if (PickerUtils.pickedElements == null)
+                return null;
+
+            var rowGUI = PickerUtils.pickedElements.OfType<IRowGUI>().FirstOrDefault();
+            if (rowGUI != null)
+                return rowGUI.asset;
+
+            return null;
+        }
+
+        static void PasteTracks()
+        {
+            var trackData = TimelineEditor.clipboard.GetTracks().ToList();
+            if (trackData.Any())
+            {
+                SelectionManager.RemoveTimelineSelection();
+            }
+
+            foreach (var track in trackData)
+            {
+                var newTrack = track.item.Duplicate(TimelineEditor.clipboard.exposedPropertyTable, TimelineEditor.inspectedDirector, TimelineEditor.inspectedAsset);
+                var newTracks = newTrack.GetFlattenedChildTracks().Append(newTrack);
+
+                var bindingIt = track.bindings.GetEnumerator();
+                var newTrackIt = newTracks.GetEnumerator();
+
+                while (bindingIt.MoveNext() && newTrackIt.MoveNext())
+                {
+                    if (bindingIt.Current != null)
+                        BindingUtility.Bind(TimelineEditor.inspectedDirector, newTrackIt.Current, bindingIt.Current);
+                }
+
+                SelectionManager.Add(newTrack);
+                foreach (var childTrack in newTrack.GetFlattenedChildTracks())
+                {
+                    SelectionManager.Add(childTrack);
+                }
+
+                if (track.parent != null && track.parent.timelineAsset == TimelineEditor.inspectedAsset)
+                {
+                    TrackExtensions.ReparentTracks(new List<TrackAsset> { newTrack }, track.parent, track.item);
+                }
+            }
+        }
+    }
+
+    [MenuEntry("Duplicate", MenuPriority.TimelineActionSection.duplicate)]
+    [Shortcut("Main Menu/Edit/Duplicate", EventCommandNames.Duplicate)]
+    class DuplicateAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context)
+        {
+            IEnumerable<TrackAsset> tracks = context.tracks.RemoveTimelineMarkerTrackFromList(context.timeline);
+            return context.clips.Any() || tracks.Any() || context.markers.Any() ? ActionValidity.Valid : ActionValidity.NotApplicable;
+        }
+
+        public bool Execute(Func<ITimelineItem, ITimelineItem, double> gapBetweenItems)
+        {
+            return Execute(TimelineEditor.CurrentContext(), gapBetweenItems);
+        }
+
+        public override bool Execute(ActionContext context)
+        {
+            return Execute(context, (item1, item2) => ItemsUtils.TimeGapBetweenItems(item1, item2));
+        }
+
+        internal bool Execute(ActionContext context, Func<ITimelineItem, ITimelineItem, double> gapBetweenItems)
+        {
+            List<ITimelineItem> items = new List<ITimelineItem>();
+            items.AddRange(context.clips.Select(p => p.ToItem()));
+            items.AddRange(context.markers.Select(p => p.ToItem()));
+            List<ItemsPerTrack> selectedItems = items.ToItemsPerTrack().ToList();
+            if (selectedItems.Any())
+            {
+                var requestedTime = CalculateDuplicateTime(selectedItems, gapBetweenItems);
+                var duplicatedItems = TimelineHelpers.DuplicateItemsUsingCurrentEditMode(TimelineEditor.inspectedDirector, TimelineEditor.inspectedDirector, selectedItems, requestedTime, "Duplicate Items");
+
+                TimelineHelpers.FrameItems(duplicatedItems);
+                SelectionManager.RemoveTimelineSelection();
+                foreach (var item in duplicatedItems)
+                    SelectionManager.Add(item);
+            }
+
+            var tracks = context.tracks.ToArray();
+            if (tracks.Length > 0)
+                tracks.Invoke<DuplicateTracks>();
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+            return true;
+        }
+
+        static double CalculateDuplicateTime(IEnumerable<ItemsPerTrack> duplicatedItems, Func<ITimelineItem, ITimelineItem, double> gapBetweenItems)
+        {
+            //Find the end time of the rightmost item
+            var itemsOnTracks = duplicatedItems.SelectMany(i => i.targetTrack.GetItems()).ToList();
+            var time = itemsOnTracks.Max(i => i.end);
+
+            //From all the duplicated items, select the leftmost items
+            var firstDuplicatedItems = duplicatedItems.Select(i => i.leftMostItem);
+            var leftMostDuplicatedItems = firstDuplicatedItems.OrderBy(i => i.start).GroupBy(i => i.start).FirstOrDefault();
+            if (leftMostDuplicatedItems == null) return 0.0;
+
+            foreach (var leftMostItem in leftMostDuplicatedItems)
+            {
+                var siblings = leftMostItem.parentTrack.GetItems();
+                var rightMostSiblings = siblings.OrderByDescending(i => i.end).GroupBy(i => i.end).FirstOrDefault();
+                if (rightMostSiblings == null) continue;
+
+                foreach (var sibling in rightMostSiblings)
+                    time = Math.Max(time, sibling.end + gapBetweenItems(leftMostItem, sibling));
+            }
+
+            return time;
+        }
+    }
+
+    [MenuEntry("Delete", MenuPriority.TimelineActionSection.delete)]
+    [Shortcut("Main Menu/Edit/Delete", EventCommandNames.Delete)]
+    [ShortcutPlatformOverride(RuntimePlatform.OSXEditor, KeyCode.Backspace, ShortcutModifiers.Action)]
+    [ActiveInMode(TimelineModes.Default)]
+    class DeleteAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context)
+        {
+            return CanDelete(context) ? ActionValidity.Valid : ActionValidity.Invalid;
+        }
+
+        static bool CanDelete(ActionContext context)
+        {
+            if (TimelineWindow.instance.state.editSequence.isReadOnly)
+                return false;
+
+            if (context.tracks.ContainsTimelineMarkerTrack(context.timeline))
+                return false;
+
+            // All() returns true when empty
+            return context.tracks.All(x => !x.lockedInHierarchy) &&
+                context.clips.All(x => x.GetParentTrack() == null || !x.GetParentTrack().lockedInHierarchy) &&
+                context.markers.All(x => x.parent == null || !x.parent.lockedInHierarchy);
+        }
+
+        public override bool Execute(ActionContext context)
+        {
+            if (!CanDelete(context))
+                return false;
+
+            var selectedItems = context.clips.Select(p => p.ToItem()).ToList();
+            selectedItems.AddRange(context.markers.Select(p => p.ToItem()));
+            DeleteItems(selectedItems);
+
+            if (context.tracks.Any() && SelectionManager.GetCurrentInlineEditorCurve() == null)
+                context.tracks.Invoke<DeleteTracks>();
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+            return selectedItems.Any() || context.tracks.Any();
+        }
+
+        internal static void DeleteItems(IEnumerable<ITimelineItem> items)
+        {
+            var tracks = items.GroupBy(c => c.parentTrack);
+
+            foreach (var track in tracks)
+                TimelineUndo.PushUndo(track.Key, L10n.Tr("Delete Items"));
+
+            TimelineAnimationUtilities.UnlinkAnimationWindowFromClips(items.OfType<ClipItem>().Select(i => i.clip));
+
+            EditMode.PrepareItemsDelete(ItemsUtils.ToItemsPerTrack(items));
+            EditModeUtils.Delete(items);
+
+            SelectionManager.RemoveAllClips();
+        }
+    }
+
+    [MenuEntry("Match Content", MenuPriority.TimelineActionSection.matchContent)]
+    [Shortcut(Shortcuts.Timeline.matchContent)]
+    class MatchContent : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext actionContext)
+        {
+            var clips = actionContext.clips;
+
+            if (!clips.Any())
+                return ActionValidity.NotApplicable;
+
+            return clips.Any(TimelineHelpers.HasUsableAssetDuration)
+                ? ActionValidity.Valid
+                : ActionValidity.Invalid;
+        }
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            var clips = actionContext.clips;
+            return clips.Any() && ClipModifier.MatchContent(clips);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.play)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class PlayTimelineAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            var currentState = TimelineEditor.state.playing;
+            TimelineEditor.state.SetPlaying(!currentState);
+            return true;
+        }
+    }
+
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectAllAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            // otherwise select all tracks.
+            SelectionManager.Clear();
+            TimelineWindow.instance.allTracks.ForEach(x => SelectionManager.Add(x.track));
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.previousFrame)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class PreviousFrameAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            if (TimelineEditor.inspectedAsset == null)
+                return false;
+            TimelineEditor.inspectedSequenceTime = TimeUtility.PreviousFrameTime(TimelineEditor.inspectedSequenceTime, TimelineEditor.inspectedAsset.editorSettings.frameRate);
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.nextFrame)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class NextFrameAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            if (TimelineEditor.inspectedAsset == null)
+                return false;
+            TimelineEditor.inspectedSequenceTime = TimeUtility.NextFrameTime(TimelineEditor.inspectedSequenceTime, TimelineEditor.inspectedAsset.editorSettings.frameRate);
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.frameAll)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class FrameAllAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context)
+        {
+            if (context.timeline != null && !context.timeline.flattenedTracks.Any())
+                return ActionValidity.NotApplicable;
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            var inlineCurveEditor = SelectionManager.GetCurrentInlineEditorCurve();
+            if (FrameSelectedAction.ShouldHandleInlineCurve(inlineCurveEditor))
+            {
+                FrameSelectedAction.FrameInlineCurves(inlineCurveEditor, false);
+                return true;
+            }
+
+            if (TimelineWindow.instance.state.IsCurrentEditingASequencerTextField())
+                return false;
+
+            var visibleTracks = TimelineWindow.instance.treeView.visibleTracks.ToList();
+
+            if (TimelineEditor.inspectedAsset != null && TimelineEditor.inspectedAsset.markerTrack != null)
+                visibleTracks.Add(TimelineEditor.inspectedAsset.markerTrack);
+
+            if (visibleTracks.Count == 0)
+                return false;
+
+            var startTime = float.MaxValue;
+            var endTime = float.MinValue;
+
+            foreach (var t in visibleTracks)
+            {
+                if (t == null)
+                    continue;
+
+                // time range based on track's curves and clips.
+                double trackStart, trackEnd, trackDuration;
+                t.GetSequenceTime(out trackStart, out trackDuration);
+                trackEnd = trackStart + trackDuration;
+
+                // take track's markers into account
+                double itemsStart, itemsEnd;
+                ItemsUtils.GetItemRange(t, out itemsStart, out itemsEnd);
+
+                startTime = Mathf.Min(startTime, (float)trackStart, (float)itemsStart);
+                endTime = Mathf.Max(endTime, (float)(trackEnd), (float)itemsEnd);
+            }
+
+            FrameSelectedAction.FrameRange(startTime, endTime);
+            return true;
+        }
+    }
+
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class FrameSelectedAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public static void FrameRange(float startTime, float endTime)
+        {
+            if (startTime > endTime)
+            {
+                return;
+            }
+
+            var halfDuration = endTime - Math.Max(0.0f, startTime);
+
+            if (halfDuration > 0.0f)
+            {
+                TimelineEditor.visibleTimeRange = new Vector2(Mathf.Max(0.0f, startTime - (halfDuration * 0.1f)), endTime + (halfDuration * 0.1f));
+            }
+            else
+            {
+                // start == end
+                // keep the zoom level constant, only pan the time area to center the item
+                var currentRange = TimelineEditor.visibleTimeRange.y - TimelineEditor.visibleTimeRange.x;
+                TimelineEditor.visibleTimeRange = new Vector2(startTime - currentRange / 2, startTime + currentRange / 2);
+            }
+
+            TimelineZoomManipulator.InvalidateWheelZoom();
+            TimelineEditor.Refresh(RefreshReason.SceneNeedsUpdate);
+        }
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            var inlineCurveEditor = SelectionManager.GetCurrentInlineEditorCurve();
+            if (ShouldHandleInlineCurve(inlineCurveEditor))
+            {
+                FrameInlineCurves(inlineCurveEditor, true);
+                return true;
+            }
+
+            if (TimelineWindow.instance.state.IsCurrentEditingASequencerTextField())
+                return false;
+
+            if (SelectionManager.Count() == 0)
+            {
+                actionContext.Invoke<FrameAllAction>();
+                return true;
+            }
+
+            var startTime = float.MaxValue;
+            var endTime = float.MinValue;
+
+            var clips = actionContext.clips.Select(ItemToItemGui.GetGuiForClip);
+            var markers = actionContext.markers;
+            if (!clips.Any() && !markers.Any())
+                return false;
+
+            foreach (var c in clips)
+            {
+                startTime = Mathf.Min(startTime, (float)c.clip.start);
+                endTime = Mathf.Max(endTime, (float)c.clip.end);
+                if (c.clipCurveEditor != null)
+                {
+                    c.clipCurveEditor.FrameClip();
+                }
+            }
+
+            foreach (var marker in markers)
+            {
+                startTime = Mathf.Min(startTime, (float)marker.time);
+                endTime = Mathf.Max(endTime, (float)marker.time);
+            }
+
+            FrameRange(startTime, endTime);
+
+            return true;
+        }
+
+        public static bool ShouldHandleInlineCurve(IClipCurveEditorOwner curveEditorOwner)
+        {
+            return curveEditorOwner?.clipCurveEditor != null &&
+                curveEditorOwner.inlineCurvesSelected &&
+                curveEditorOwner.owner != null &&
+                curveEditorOwner.owner.GetShowInlineCurves();
+        }
+
+        public static void FrameInlineCurves(IClipCurveEditorOwner curveEditorOwner, bool selectionOnly)
+        {
+            var curveEditor = curveEditorOwner.clipCurveEditor.curveEditor;
+            var frameBounds = selectionOnly ? curveEditor.GetSelectionBounds() : curveEditor.GetClipBounds();
+
+            var clipGUI = curveEditorOwner as TimelineClipGUI;
+            var areaOffset = 0.0f;
+
+            if (clipGUI != null)
+            {
+                areaOffset = (float)Math.Max(0.0, clipGUI.clip.FromLocalTimeUnbound(0.0));
+
+                var timeScale = (float)clipGUI.clip.timeScale;  // Note: The getter for clip.timeScale is guaranteed to never be zero.
+
+                // Apply scaling
+                var newMin = frameBounds.min.x / timeScale;
+                var newMax = (frameBounds.max.x - frameBounds.min.x) / timeScale + newMin;
+
+                frameBounds.SetMinMax(
+                    new Vector3(newMin, frameBounds.min.y, frameBounds.min.z),
+                    new Vector3(newMax, frameBounds.max.y, frameBounds.max.z));
+            }
+
+            curveEditor.Frame(frameBounds, true, true);
+
+            var area = curveEditor.shownAreaInsideMargins;
+            area.x += areaOffset;
+
+            var curveStart = curveEditorOwner.clipCurveEditor.dataSource.start;
+            FrameRange(curveStart + frameBounds.min.x, curveStart + frameBounds.max.x);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.previousKey)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class PrevKeyAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            if (TimelineEditor.inspectedAsset == null)
+                return false;
+            var keyTraverser = new Utilities.KeyTraverser(TimelineEditor.inspectedAsset, 0.01f / (float)TimelineEditor.inspectedAsset.editorSettings.frameRate);
+            var time = keyTraverser.GetPrevKey((float)TimelineEditor.inspectedSequenceTime, TimelineWindow.instance.state.dirtyStamp);
+            if (time != TimelineEditor.inspectedSequenceTime)
+            {
+                TimelineEditor.inspectedSequenceTime = time;
+            }
+
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.nextKey)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class NextKeyAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            if (TimelineEditor.inspectedAsset == null)
+                return false;
+            var keyTraverser = new Utilities.KeyTraverser(TimelineEditor.inspectedAsset, 0.01f / (float)TimelineEditor.inspectedAsset.editorSettings.frameRate);
+            var time = keyTraverser.GetNextKey((float)TimelineEditor.inspectedSequenceTime, TimelineWindow.instance.state.dirtyStamp);
+            if (time != TimelineEditor.inspectedSequenceTime)
+            {
+                TimelineEditor.inspectedSequenceTime = time;
+            }
+
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.goToStart)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class GotoStartAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            TimelineEditor.inspectedSequenceTime = 0.0f;
+            TimelineWindow.instance.state.EnsurePlayHeadIsVisible();
+
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.goToEnd)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class GotoEndAction : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            TimelineEditor.inspectedSequenceTime = TimelineWindow.instance.state.editSequence.duration;
+            TimelineWindow.instance.state.EnsurePlayHeadIsVisible();
+
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.zoomIn)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class ZoomIn : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            TimelineZoomManipulator.Instance.DoZoom(1.15f);
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.zoomOut)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class ZoomOut : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            TimelineZoomManipulator.Instance.DoZoom(0.85f);
+            return true;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.navigateLeft)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class NavigateLeft : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.NavigateLeft(actionContext.tracks);
+        }
+    }
+
+
+    [Shortcut(Shortcuts.Timeline.navigateRight)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class NavigateRight : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.NavigateRight(actionContext.tracks);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.toggleCollapseTrack)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class ToggleCollapseGroup : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.ToggleCollapseGroup(actionContext.tracks);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.selectLeftItem)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectLeftClip : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            // Switches to track header if no left track exists
+            return KeyboardNavigation.SelectLeftItem();
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.selectRightItem)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectRightClip : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectRightItem();
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.selectUpItem)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectUpClip : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectUpItem();
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.selectUpTrack)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectUpTrack : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectUpTrack();
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.selectDownItem)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectDownClip : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectDownItem();
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.selectDownTrack)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class SelectDownTrack : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            if (!KeyboardNavigation.ClipAreaActive() && !KeyboardNavigation.TrackHeadActive())
+                return KeyboardNavigation.FocusFirstVisibleItem();
+            else
+                return KeyboardNavigation.SelectDownTrack();
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.multiSelectLeft)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class MultiselectLeftClip : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectLeftItem(true);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.multiSelectRight)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class MultiselectRightClip : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectRightItem(true);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.multiSelectUp)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class MultiselectUpTrack : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectUpTrack(true);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.multiSelectDown)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class MultiselectDownTrack : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            return KeyboardNavigation.SelectDownTrack(true);
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.toggleClipTrackArea)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class ToggleClipTrackArea : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext context) => ActionValidity.Valid;
+
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            if (KeyboardNavigation.TrackHeadActive())
+                return KeyboardNavigation.FocusFirstVisibleItem(actionContext.tracks);
+
+            if (!KeyboardNavigation.ClipAreaActive())
+                return KeyboardNavigation.FocusFirstVisibleItem();
+
+            var item = KeyboardNavigation.GetVisibleSelectedItems().LastOrDefault();
+            if (item != null)
+                SelectionManager.SelectOnly(item.parentTrack);
+            return true;
+        }
+    }
+
+    [MenuEntry("Key All Animated", MenuPriority.TimelineActionSection.keyAllAnimated)]
+    [Shortcut(Shortcuts.Timeline.keyAllAnimated)]
+    class KeyAllAnimated : TimelineAction
+    {
+        public override ActionValidity Validate(ActionContext actionContext)
+        {
+            return CanExecute(TimelineEditor.state, actionContext)
+                ? ActionValidity.Valid
+                : ActionValidity.NotApplicable;
+        }
+
+        public override bool Execute(ActionContext actionContext)
+        {
+            WindowState state = TimelineEditor.state;
+            PlayableDirector director = TimelineEditor.inspectedDirector;
+
+            if (!CanExecute(state, actionContext) || director == null)
+                return false;
+
+            IEnumerable<TrackAsset> keyableTracks = GetKeyableTracks(state, actionContext);
+
+            var curveSelected = SelectionManager.GetCurrentInlineEditorCurve();
+            if (curveSelected != null)
+            {
+                var sel = curveSelected.clipCurveEditor.GetSelectedProperties().ToList();
+                var go = (director.GetGenericBinding(curveSelected.owner) as Component).gameObject;
+                if (sel.Count > 0)
+                {
+                    TimelineRecording.KeyProperties(go, state, sel);
+                }
+                else
+                {
+                    var binding = director.GetGenericBinding(curveSelected.owner) as Component;
+                    TimelineRecording.KeyAllProperties(binding, state);
+                }
+            }
+            else
+            {
+                foreach (var track in keyableTracks)
+                {
+                    var binding = director.GetGenericBinding(track) as Component;
+                    TimelineRecording.KeyAllProperties(binding, state);
+                }
+            }
+            return true;
+        }
+
+        static IEnumerable<TrackAsset> GetKeyableTracks(WindowState state, ActionContext context)
+        {
+            if (!context.clips.Any() && !context.tracks.Any()) //no selection -> animate all recorded tracks
+                return context.timeline.flattenedTracks.Where(state.IsArmedForRecord);
+
+            List<TrackAsset> parentTracks = context.tracks.ToList();
+            parentTracks.AddRange(context.clips.Select(clip => clip.GetParentTrack()).Distinct());
+
+            if (!parentTracks.All(state.IsArmedForRecord))
+                return Enumerable.Empty<TrackAsset>();
+
+            return parentTracks;
+        }
+
+        static bool CanExecute(WindowState state, ActionContext context)
+        {
+            if (context.timeline == null)
+                return false;
+
+            if (context.markers.Any())
+                return false;
+
+            if (context.tracks.ContainsTimelineMarkerTrack(context.timeline))
+                return false;
+
+            IClipCurveEditorOwner curveSelected = SelectionManager.GetCurrentInlineEditorCurve();
+            // Can't have an inline curve selected and have multiple tracks also.
+            if (curveSelected != null)
+            {
+                return state.IsArmedForRecord(curveSelected.owner);
+            }
+
+            return GetKeyableTracks(state, context).Any();
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TimelineActions.cs.meta

@@ -0,0 +1,11 @@
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+guid: b1c789407b55e3a4c9cc86135a714e33
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TrackAction.cs

@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Base class for a track action.
+    /// Inherit from this class to make an action that would react on selected tracks after a menu click and/or a key shortcut.
+    /// </summary>
+    /// <example>
+    /// Simple track Action example (with context menu and shortcut support).
+    /// <code source="../../DocCodeExamples/ActionExamples.cs" region="declare-sampleTrackAction" title="SampleTrackAction"/>
+    /// </example>
+    /// <remarks>
+    /// To add an action as a menu item in the Timeline context menu, add <see cref="MenuEntryAttribute"/> on the action class.
+    /// To make an action to react to a shortcut, use the Shortcut Manager API with <see cref="TimelineShortcutAttribute"/>.
+    /// <seealso cref="UnityEditor.ShortcutManagement.ShortcutAttribute"/>
+    /// </remarks>
+    [ActiveInMode(TimelineModes.Default)]
+    public abstract class TrackAction : IAction
+    {
+        /// <summary>
+        ///  Execute the action.
+        /// </summary>
+        /// <param name="tracks">Tracks that will be used for the action. </param>
+        /// <returns>true if the action has been executed. false otherwise</returns>
+        public abstract bool Execute(IEnumerable<TrackAsset> tracks);
+
+        /// <summary>
+        ///  Defines the validity of an Action for a given set of tracks.
+        /// </summary>
+        ///  <param name="tracks">tracks that the action would act on.</param>
+        /// <returns>The validity of the set of tracks.</returns>
+        public abstract ActionValidity Validate(IEnumerable<TrackAsset> tracks);
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TrackAction.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TrackActions.cs

@@ -0,0 +1,527 @@
+using System.Collections.Generic;
+using System.Linq;
+using JetBrains.Annotations;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [MenuEntry("Edit in Animation Window", MenuPriority.TrackActionSection.editInAnimationWindow)]
+    class EditTrackInAnimationWindow : TrackAction
+    {
+        public static bool Do(TrackAsset track)
+        {
+            AnimationClip clipToEdit = null;
+
+            AnimationTrack animationTrack = track as AnimationTrack;
+            if (animationTrack != null)
+            {
+                if (!animationTrack.CanConvertToClipMode())
+                    return false;
+
+                clipToEdit = animationTrack.infiniteClip;
+            }
+            else if (track.hasCurves)
+            {
+                clipToEdit = track.curves;
+            }
+
+            if (clipToEdit == null)
+                return false;
+
+            GameObject gameObject = null;
+            if (TimelineEditor.inspectedDirector != null)
+                gameObject = TimelineUtility.GetSceneGameObject(TimelineEditor.inspectedDirector, track);
+
+            var timeController = TimelineAnimationUtilities.CreateTimeController(CreateTimeControlClipData(track));
+            TimelineAnimationUtilities.EditAnimationClipWithTimeController(clipToEdit, timeController, gameObject);
+
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            if (!tracks.Any())
+                return ActionValidity.Invalid;
+
+            var firstTrack = tracks.First();
+            if (firstTrack is AnimationTrack)
+            {
+                var animTrack = firstTrack as AnimationTrack;
+                if (animTrack.CanConvertToClipMode())
+                    return ActionValidity.Valid;
+            }
+            else if (firstTrack.hasCurves)
+            {
+                return ActionValidity.Valid;
+            }
+
+            return ActionValidity.NotApplicable;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            return Do(tracks.First());
+        }
+
+        static TimelineWindowTimeControl.ClipData CreateTimeControlClipData(TrackAsset track)
+        {
+            var data = new TimelineWindowTimeControl.ClipData();
+            data.track = track;
+            data.start = track.start;
+            data.duration = track.duration;
+            return data;
+        }
+    }
+
+    [MenuEntry("Lock selected track only", MenuPriority.TrackActionSection.lockSelected)]
+    class LockSelectedTrack : TrackAction, IMenuName
+    {
+        public static readonly string LockSelectedTrackOnlyText = L10n.Tr("Lock selected track only");
+        public static readonly string UnlockSelectedTrackOnlyText = L10n.Tr("Unlock selected track only");
+
+        public string menuName { get; private set; }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            UpdateMenuName(tracks);
+            if (tracks.Any(track => TimelineUtility.IsLockedFromGroup(track) || track is GroupTrack || !track.subTracksObjects.Any()))
+                return ActionValidity.NotApplicable;
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            if (!tracks.Any()) return false;
+
+            var hasUnlockedTracks = tracks.Any(x => !x.locked);
+            Lock(tracks.Where(p => !(p is GroupTrack)).ToArray(), hasUnlockedTracks);
+            return true;
+        }
+
+        void UpdateMenuName(IEnumerable<TrackAsset> tracks)
+        {
+            menuName = tracks.All(t => t.locked) ? UnlockSelectedTrackOnlyText : LockSelectedTrackOnlyText;
+        }
+
+        public static void Lock(TrackAsset[] tracks, bool shouldlock)
+        {
+            if (tracks.Length == 0)
+                return;
+
+            foreach (var track in tracks.Where(t => !TimelineUtility.IsLockedFromGroup(t)))
+            {
+                TimelineUndo.PushUndo(track, L10n.Tr("Lock Tracks"));
+                track.locked = shouldlock;
+            }
+            TimelineEditor.Refresh(RefreshReason.WindowNeedsRedraw);
+        }
+    }
+
+    [MenuEntry("Lock", MenuPriority.TrackActionSection.lockTrack)]
+    [Shortcut(Shortcuts.Timeline.toggleLock)]
+    class LockTrack : TrackAction, IMenuName
+    {
+        static readonly string k_LockText = L10n.Tr("Lock");
+        static readonly string k_UnlockText = L10n.Tr("Unlock");
+
+        public string menuName { get; private set; }
+
+        void UpdateMenuName(IEnumerable<TrackAsset> tracks)
+        {
+            menuName = tracks.Any(x => !x.locked) ? k_LockText : k_UnlockText;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            if (!tracks.Any()) return false;
+
+            var hasUnlockedTracks = tracks.Any(x => !x.locked);
+            SetLockState(tracks, hasUnlockedTracks);
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            UpdateMenuName(tracks);
+            tracks = tracks.RemoveTimelineMarkerTrackFromList(TimelineEditor.inspectedAsset);
+
+            if (!tracks.Any())
+                return ActionValidity.NotApplicable;
+            if (tracks.Any(TimelineUtility.IsLockedFromGroup))
+                return ActionValidity.Invalid;
+            return ActionValidity.Valid;
+        }
+
+        public static void SetLockState(IEnumerable<TrackAsset> tracks, bool shouldLock)
+        {
+            if (!tracks.Any())
+                return;
+
+            foreach (var track in tracks)
+            {
+                if (TimelineUtility.IsLockedFromGroup(track))
+                    continue;
+
+                if (track as GroupTrack == null)
+                    SetLockState(track.GetChildTracks().ToArray(), shouldLock);
+
+                TimelineUndo.PushUndo(track, L10n.Tr("Lock Tracks"));
+                track.locked = shouldLock;
+            }
+
+            // find the tracks we've locked. unselect anything locked and remove recording.
+            foreach (var track in tracks)
+            {
+                if (TimelineUtility.IsLockedFromGroup(track) || !track.locked)
+                    continue;
+
+                var flattenedChildTracks = track.GetFlattenedChildTracks();
+                foreach (var i in track.clips)
+                    SelectionManager.Remove(i);
+                track.UnarmForRecord();
+                foreach (var child in flattenedChildTracks)
+                {
+                    SelectionManager.Remove(child);
+                    child.UnarmForRecord();
+                    foreach (var clip in child.GetClips())
+                        SelectionManager.Remove(clip);
+                }
+            }
+
+            // no need to rebuild, just repaint (including inspectors)
+            InspectorWindow.RepaintAllInspectors();
+            TimelineEditor.Refresh(RefreshReason.WindowNeedsRedraw);
+        }
+    }
+
+    [UsedImplicitly]
+    [MenuEntry("Show Markers", MenuPriority.TrackActionSection.showHideMarkers)]
+    [ActiveInMode(TimelineModes.Default | TimelineModes.ReadOnly)]
+    class ShowHideMarkers : TrackAction, IMenuChecked
+    {
+        public bool isChecked { get; private set; }
+
+        void UpdateCheckedStatus(IEnumerable<TrackAsset> tracks)
+        {
+            isChecked = tracks.All(x => x.GetShowMarkers());
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            UpdateCheckedStatus(tracks);
+            if (tracks.Any(x => x is GroupTrack) || tracks.Any(t => t.GetMarkerCount() == 0))
+                return ActionValidity.NotApplicable;
+
+            if (tracks.Any(t => t.lockedInHierarchy))
+            {
+                return ActionValidity.Invalid;
+            }
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            if (!tracks.Any()) return false;
+
+            var hasUnlockedTracks = tracks.Any(x => !x.GetShowMarkers());
+            ShowHide(tracks, hasUnlockedTracks);
+            return true;
+        }
+
+        static void ShowHide(IEnumerable<TrackAsset> tracks, bool shouldLock)
+        {
+            if (!tracks.Any())
+                return;
+
+            foreach (var track in tracks)
+                track.SetShowTrackMarkers(shouldLock);
+
+            TimelineEditor.Refresh(RefreshReason.WindowNeedsRedraw);
+        }
+    }
+
+    [MenuEntry("Mute selected track only", MenuPriority.TrackActionSection.muteSelected), UsedImplicitly]
+    class MuteSelectedTrack : TrackAction, IMenuName
+    {
+        public static readonly string MuteSelectedText = L10n.Tr("Mute selected track only");
+        public static readonly string UnmuteSelectedText = L10n.Tr("Unmute selected track only");
+
+        public string menuName { get; private set; }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            UpdateMenuName(tracks);
+            if (tracks.Any(track => TimelineUtility.IsParentMuted(track) || track is GroupTrack || !track.subTracksObjects.Any()))
+                return ActionValidity.NotApplicable;
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            if (!tracks.Any())
+                return false;
+
+            var hasUnmutedTracks = tracks.Any(x => !x.muted);
+            Mute(tracks.Where(p => !(p is GroupTrack)).ToArray(), hasUnmutedTracks);
+            return true;
+        }
+
+        void UpdateMenuName(IEnumerable<TrackAsset> tracks)
+        {
+            menuName = tracks.All(t => t.muted) ? UnmuteSelectedText : MuteSelectedText;
+        }
+
+        public static void Mute(TrackAsset[] tracks, bool shouldMute)
+        {
+            if (tracks.Length == 0)
+                return;
+
+            foreach (var track in tracks.Where(t => !TimelineUtility.IsParentMuted(t)))
+            {
+                TimelineUndo.PushUndo(track, L10n.Tr("Mute Tracks"));
+                track.muted = shouldMute;
+            }
+
+            TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+    }
+
+    [MenuEntry("Mute", MenuPriority.TrackActionSection.mute)]
+    [Shortcut(Shortcuts.Timeline.toggleMute)]
+    class MuteTrack : TrackAction, IMenuName
+    {
+        static readonly string k_MuteText = L10n.Tr("Mute");
+        static readonly string k_UnMuteText = L10n.Tr("Unmute");
+
+        public string menuName { get; private set; }
+
+        void UpdateMenuName(IEnumerable<TrackAsset> tracks)
+        {
+            menuName = tracks.Any(x => !x.muted) ? k_MuteText : k_UnMuteText;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            if (!tracks.Any() || tracks.Any(TimelineUtility.IsParentMuted))
+                return false;
+
+            var hasUnmutedTracks = tracks.Any(x => !x.muted);
+            Mute(tracks, hasUnmutedTracks);
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            UpdateMenuName(tracks);
+            if (tracks.Any(TimelineUtility.IsLockedFromGroup))
+                return ActionValidity.Invalid;
+            return ActionValidity.Valid;
+        }
+
+        public static void Mute(IEnumerable<TrackAsset> tracks, bool shouldMute)
+        {
+            if (!tracks.Any())
+                return;
+
+            foreach (var track in tracks)
+            {
+                if (track as GroupTrack == null)
+                    Mute(track.GetChildTracks().ToArray(), shouldMute);
+                TimelineUndo.PushUndo(track, L10n.Tr("Mute Tracks"));
+                track.muted = shouldMute;
+            }
+
+            TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+    }
+
+    class DeleteTracks : TrackAction
+    {
+        public static void Do(TimelineAsset timeline, TrackAsset track)
+        {
+            SelectionManager.Remove(track);
+            TrackModifier.DeleteTrack(timeline, track);
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks) => ActionValidity.Valid;
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            tracks = tracks.RemoveTimelineMarkerTrackFromList(TimelineEditor.inspectedAsset);
+
+            // disable preview mode so deleted tracks revert to default state
+            // Case 956129: Disable preview mode _before_ deleting the tracks, since clip data is still needed
+            TimelineEditor.state.previewMode = false;
+
+            TimelineAnimationUtilities.UnlinkAnimationWindowFromTracks(tracks);
+
+            foreach (var track in tracks)
+                Do(TimelineEditor.inspectedAsset, track);
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+
+            return true;
+        }
+    }
+
+    class CopyTracksToClipboard : TrackAction
+    {
+        public static bool Do(TrackAsset[] tracks)
+        {
+            var action = new CopyTracksToClipboard();
+            return action.Execute(tracks);
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks) => ActionValidity.Valid;
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            tracks = tracks.RemoveTimelineMarkerTrackFromList(TimelineEditor.inspectedAsset);
+            TimelineEditor.clipboard.CopyTracks(tracks);
+            return true;
+        }
+    }
+
+    class DuplicateTracks : TrackAction
+    {
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks) => ActionValidity.Valid;
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            tracks = tracks.RemoveTimelineMarkerTrackFromList(TimelineEditor.inspectedAsset);
+            if (tracks.Any())
+            {
+                SelectionManager.RemoveTimelineSelection();
+            }
+
+            foreach (var track in TrackExtensions.FilterTracks(tracks))
+            {
+                var newTrack = track.Duplicate(TimelineEditor.inspectedDirector, TimelineEditor.inspectedDirector);
+                //Add all duplicated tracks to selection
+                SelectionManager.Add(newTrack);
+                foreach (var childTrack in newTrack.GetFlattenedChildTracks())
+                {
+                    SelectionManager.Add(childTrack);
+                }
+
+                //Duplicate bindings for tracks and subtracks
+                if (TimelineEditor.inspectedDirector != null)
+                {
+                    DuplicateBindings(track, newTrack, TimelineEditor.inspectedDirector);
+                }
+            }
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+
+            return true;
+        }
+
+        internal static void DuplicateBindings(TrackAsset track, TrackAsset newTrack, PlayableDirector director)
+        {
+            var originalTracks = track.GetFlattenedChildTracks().Append(track);
+            var newTracks = newTrack.GetFlattenedChildTracks().Append(newTrack);
+            var toBind = new List<Tuple<TrackAsset, Object>>();
+
+            // Collect all track bindings to duplicate
+            var originalIt = originalTracks.GetEnumerator();
+            var newIt = newTracks.GetEnumerator();
+            while (originalIt.MoveNext() && newIt.MoveNext())
+            {
+                var binding = director.GetGenericBinding(originalIt.Current);
+                if (binding != null)
+                    toBind.Add(new Tuple<TrackAsset, Object>(newIt.Current, binding));
+            }
+
+            //Only create Director undo if there are bindings to duplicate
+            if (toBind.Count > 0)
+                TimelineUndo.PushUndo(TimelineEditor.inspectedDirector, L10n.Tr("Duplicate"));
+
+            //Assign bindings for all tracks after undo.
+            foreach (var binding in toBind)
+            {
+                TimelineEditor.inspectedDirector.SetGenericBinding(binding.Item1, binding.Item2);
+            }
+        }
+    }
+
+    [MenuEntry("Remove Invalid Markers", MenuPriority.TrackActionSection.removeInvalidMarkers), UsedImplicitly]
+    class RemoveInvalidMarkersAction : TrackAction
+    {
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            if (tracks.Any(target => target != null && target.GetMarkerCount() != target.GetMarkersRaw().Count()))
+                return ActionValidity.Valid;
+
+            return ActionValidity.NotApplicable;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            bool anyRemoved = false;
+            foreach (var target in tracks)
+            {
+                var invalids = target.GetMarkersRaw().Where(x => !(x is IMarker)).ToList();
+                foreach (var m in invalids)
+                {
+                    anyRemoved = true;
+                    target.DeleteMarkerRaw(m);
+                }
+            }
+
+            if (anyRemoved)
+                TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+
+            return anyRemoved;
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.collapseTrack)]
+    [UsedImplicitly]
+    class CollapseTrackAction : TrackAction
+    {
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            var collapsibleTracks = tracks.Where(track => track.subTracksObjects.Any());
+
+            if (!collapsibleTracks.Any())
+                return ActionValidity.NotApplicable;
+
+            if (collapsibleTracks.All(track => track.IsCollapsed()))
+                return ActionValidity.NotApplicable;
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            return KeyboardNavigation.TryCollapse(tracks.Where(track => track.subTracksObjects.Any() && !track.IsCollapsed()));
+        }
+    }
+
+    [Shortcut(Shortcuts.Timeline.expandTrack)]
+    [UsedImplicitly]
+    class ExpandTrackAction : TrackAction
+    {
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            var collapsibleTracks = tracks.Where(track => track.subTracksObjects.Any());
+
+            if (!collapsibleTracks.Any())
+                return ActionValidity.NotApplicable;
+
+            if (collapsibleTracks.All(track => !track.IsCollapsed()))
+                return ActionValidity.NotApplicable;
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            return KeyboardNavigation.TryExpand(tracks.Where(track => track.subTracksObjects.Any() && track.IsCollapsed()));
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Actions/TrackActions.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Activation.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Activation/ActivationTrackEditor.cs

@@ -0,0 +1,56 @@
+using JetBrains.Annotations;
+using UnityEngine;
+using UnityEngine.Timeline;
+using UnityEngine.Playables;
+
+namespace UnityEditor.Timeline
+{
+    [UsedImplicitly]
+    [CustomTimelineEditor(typeof(ActivationTrack))]
+    class ActivationTrackEditor : TrackEditor
+    {
+        static readonly string ClipText = L10n.Tr("Active");
+
+        static readonly string k_ErrorParentString = L10n.Tr("The bound GameObject is a parent of the PlayableDirector.");
+        static readonly string k_ErrorString = L10n.Tr("The bound GameObject contains the PlayableDirector.");
+
+        public override TrackDrawOptions GetTrackOptions(TrackAsset track, Object binding)
+        {
+            var options = base.GetTrackOptions(track, binding);
+            options.errorText = GetErrorText(track, binding);
+            return options;
+        }
+
+        string GetErrorText(TrackAsset track, Object binding)
+        {
+            var gameObject = binding as GameObject;
+            var currentDirector = TimelineEditor.inspectedDirector;
+            if (gameObject != null && currentDirector != null)
+            {
+                var director = gameObject.GetComponent<PlayableDirector>();
+                if (currentDirector == director)
+                {
+                    return k_ErrorString;
+                }
+
+                if (currentDirector.gameObject.transform.IsChildOf(gameObject.transform))
+                {
+                    return k_ErrorParentString;
+                }
+            }
+
+            return base.GetErrorText(track, binding, TrackBindingErrors.PrefabBound);
+        }
+
+        public override void OnCreate(TrackAsset track, TrackAsset copiedFrom)
+        {
+            // Add a default clip to the newly created track
+            if (copiedFrom == null)
+            {
+                var clip = track.CreateClip(0);
+                clip.displayName = ClipText;
+                clip.duration = System.Math.Max(clip.duration, track.timelineAsset.duration * 0.5f);
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Activation/ActivationTrackEditor.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Activation/ActivationTrackInspector.cs

@@ -0,0 +1,43 @@
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [CustomEditor(typeof(ActivationTrack))]
+    class ActivationTrackInspector : TrackAssetInspector
+    {
+        static class Styles
+        {
+            public static readonly GUIContent PostPlaybackStateText = L10n.TextContent("Post-playback state");
+        }
+
+        SerializedProperty m_PostPlaybackProperty;
+
+        public override void OnInspectorGUI()
+        {
+            using (new EditorGUI.DisabledScope(IsTrackLocked()))
+            {
+                serializedObject.Update();
+
+                EditorGUI.BeginChangeCheck();
+
+                if (m_PostPlaybackProperty != null)
+                    EditorGUILayout.PropertyField(m_PostPlaybackProperty, Styles.PostPlaybackStateText);
+
+                if (EditorGUI.EndChangeCheck())
+                {
+                    serializedObject.ApplyModifiedProperties();
+                    var activationTrack = target as ActivationTrack;
+                    if (activationTrack != null)
+                        activationTrack.UpdateTrackMode();
+                }
+            }
+        }
+
+        public override void OnEnable()
+        {
+            base.OnEnable();
+            m_PostPlaybackProperty = serializedObject.FindProperty("m_PostPlaybackState");
+        }
+    }
+}

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Analytics/TimelineAnalytics.cs

@@ -0,0 +1,170 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.Build;
+using UnityEditor.Build.Reporting;
+using UnityEngine.Playables;
+using UnityEngine.SceneManagement;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline.Analytics
+{
+    class TimelineSceneInfo
+    {
+        public Dictionary<string, int> trackCount = new Dictionary<string, int>
+        {
+            {"ActivationTrack", 0},
+            {"AnimationTrack", 0},
+            {"AudioTrack", 0},
+            {"ControlTrack", 0},
+            {"PlayableTrack", 0},
+            {"UserType", 0},
+            {"Other", 0}
+        };
+
+        public Dictionary<string, int> userTrackTypesCount = new Dictionary<string, int>();
+        public HashSet<TimelineAsset> uniqueDirectors = new HashSet<TimelineAsset>();
+        public int numTracks = 0;
+        public int minDuration = int.MaxValue;
+        public int maxDuration = int.MinValue;
+        public int minNumTracks = int.MaxValue;
+        public int maxNumTracks = int.MinValue;
+        public int numRecorded = 0;
+    }
+
+    [Serializable]
+    struct TrackInfo
+    {
+        public string name;
+        public double percent;
+    }
+
+    [Serializable]
+    class TimelineEventInfo
+    {
+        public int num_timelines;
+        public int min_duration, max_duration;
+        public int min_num_tracks, max_num_tracks;
+        public double recorded_percent;
+        public List<TrackInfo> track_info = new List<TrackInfo>();
+        public string most_popular_user_track = string.Empty;
+
+        public TimelineEventInfo(TimelineSceneInfo sceneInfo)
+        {
+            num_timelines = sceneInfo.uniqueDirectors.Count;
+            min_duration = sceneInfo.minDuration;
+            max_duration = sceneInfo.maxDuration;
+            min_num_tracks = sceneInfo.minNumTracks;
+            max_num_tracks = sceneInfo.maxNumTracks;
+            recorded_percent = Math.Round(100.0 * sceneInfo.numRecorded / sceneInfo.numTracks, 1);
+
+            foreach (KeyValuePair<string, int> kv in sceneInfo.trackCount.Where(x => x.Value > 0))
+            {
+                track_info.Add(new TrackInfo()
+                {
+                    name = kv.Key,
+                    percent = Math.Round(100.0 * kv.Value / sceneInfo.numTracks, 1)
+                });
+            }
+
+            if (sceneInfo.userTrackTypesCount.Any())
+            {
+                most_popular_user_track = sceneInfo.userTrackTypesCount
+                    .First(x => x.Value == sceneInfo.userTrackTypesCount.Values.Max()).Key;
+            }
+        }
+
+        public static bool IsUserType(Type t)
+        {
+            string nameSpace = t.Namespace;
+            return string.IsNullOrEmpty(nameSpace) || !nameSpace.StartsWith("UnityEngine.Timeline");
+        }
+    }
+
+
+    static class TimelineAnalytics
+    {
+        static TimelineSceneInfo _timelineSceneInfo = new TimelineSceneInfo();
+
+        class TimelineAnalyticsPreProcess : IPreprocessBuildWithReport
+        {
+            public int callbackOrder { get { return 0; } }
+            public void OnPreprocessBuild(BuildReport report)
+            {
+                _timelineSceneInfo = new TimelineSceneInfo();
+            }
+        }
+
+        class TimelineAnalyticsProcess : IProcessSceneWithReport
+        {
+            public int callbackOrder
+            {
+                get { return 0; }
+            }
+
+            public void OnProcessScene(Scene scene, BuildReport report)
+            {
+                var timelines = UnityEngine.Object.FindObjectsOfType<PlayableDirector>().Select(pd => pd.playableAsset).OfType<TimelineAsset>().Distinct();
+
+                foreach (var timeline in timelines)
+                {
+                    if (_timelineSceneInfo.uniqueDirectors.Add(timeline))
+                    {
+                        _timelineSceneInfo.numTracks += timeline.flattenedTracks.Count();
+                        _timelineSceneInfo.minDuration = Math.Min(_timelineSceneInfo.minDuration, (int)(timeline.duration * 1000));
+                        _timelineSceneInfo.maxDuration = Math.Max(_timelineSceneInfo.maxDuration, (int)(timeline.duration * 1000));
+                        _timelineSceneInfo.minNumTracks = Math.Min(_timelineSceneInfo.minNumTracks, timeline.flattenedTracks.Count());
+                        _timelineSceneInfo.maxNumTracks = Math.Max(_timelineSceneInfo.maxNumTracks, timeline.flattenedTracks.Count());
+
+                        foreach (var track in timeline.flattenedTracks)
+                        {
+                            string key = track.GetType().Name;
+                            if (_timelineSceneInfo.trackCount.ContainsKey(key))
+                            {
+                                _timelineSceneInfo.trackCount[key]++;
+                            }
+                            else
+                            {
+                                if (TimelineEventInfo.IsUserType(track.GetType()))
+                                {
+                                    _timelineSceneInfo.trackCount["UserType"]++;
+                                    if (_timelineSceneInfo.userTrackTypesCount.ContainsKey(key))
+                                        _timelineSceneInfo.userTrackTypesCount[key]++;
+                                    else
+                                        _timelineSceneInfo.userTrackTypesCount[key] = 1;
+                                }
+                                else
+                                    _timelineSceneInfo.trackCount["Other"]++;
+                            }
+
+                            if (track.clips.Any(x => x.recordable))
+                                _timelineSceneInfo.numRecorded++;
+                            else
+                            {
+                                var animationTrack = track as AnimationTrack;
+                                if (animationTrack != null)
+                                {
+                                    if (animationTrack.CanConvertToClipMode())
+                                        _timelineSceneInfo.numRecorded++;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        class TimelineAnalyticsPostProcess : IPostprocessBuildWithReport
+        {
+            public int callbackOrder { get { return 0; } }
+            public void OnPostprocessBuild(BuildReport report)
+            {
+                if (_timelineSceneInfo.uniqueDirectors.Count > 0)
+                {
+                    var timelineEvent = new TimelineEventInfo(_timelineSceneInfo);
+                    EditorAnalytics.SendEventTimelineInfo(timelineEvent);
+                }
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Analytics/TimelineAnalytics.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationClipActions.cs

@@ -0,0 +1,101 @@
+using System.Collections.Generic;
+using System.Linq;
+using JetBrains.Annotations;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Timeline;
+using UnityEngine.Playables;
+
+namespace UnityEditor.Timeline
+{
+    [ApplyDefaultUndo("Match Offsets")]
+    [MenuEntry("Match Offsets To Previous Clip", MenuPriority.CustomClipActionSection.matchPrevious), UsedImplicitly]
+    class MatchOffsetsPreviousAction : ClipAction
+    {
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            if (clips == null || !clips.Any())
+                return false;
+            AnimationOffsetMenu.MatchClipsToPrevious(clips.Where(x => IsValidClip(x, TimelineEditor.inspectedDirector)).ToArray());
+            return true;
+        }
+
+        static bool IsValidClip(TimelineClip clip, PlayableDirector director)
+        {
+            return clip != null &&
+                clip.GetParentTrack() != null &&
+                (clip.asset as AnimationPlayableAsset) != null &&
+                clip.GetParentTrack().clips.Any(x => x.start < clip.start) &&
+                TimelineUtility.GetSceneGameObject(director, clip.GetParentTrack()) != null;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            if (!clips.All(TimelineAnimationUtilities.IsAnimationClip))
+                return ActionValidity.NotApplicable;
+
+            var director = TimelineEditor.inspectedDirector;
+            if (TimelineEditor.inspectedDirector == null)
+                return ActionValidity.NotApplicable;
+
+            if (clips.Any(c => IsValidClip(c, director)))
+                return ActionValidity.Valid;
+
+            return ActionValidity.NotApplicable;
+        }
+    }
+
+    [ApplyDefaultUndo("Match Offsets")]
+    [MenuEntry("Match Offsets To Next Clip", MenuPriority.CustomClipActionSection.matchNext), UsedImplicitly]
+    class MatchOffsetsNextAction : ClipAction
+    {
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            AnimationOffsetMenu.MatchClipsToNext(clips.Where(x => IsValidClip(x, TimelineEditor.inspectedDirector)).ToArray());
+            return true;
+        }
+
+        static bool IsValidClip(TimelineClip clip, PlayableDirector director)
+        {
+            return clip != null &&
+                clip.GetParentTrack() != null &&
+                (clip.asset as AnimationPlayableAsset) != null &&
+                clip.GetParentTrack().clips.Any(x => x.start > clip.start) &&
+                TimelineUtility.GetSceneGameObject(director, clip.GetParentTrack()) != null;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            if (!clips.All(TimelineAnimationUtilities.IsAnimationClip))
+                return ActionValidity.NotApplicable;
+
+            var director = TimelineEditor.inspectedDirector;
+            if (TimelineEditor.inspectedDirector == null)
+                return ActionValidity.NotApplicable;
+
+            if (clips.Any(c => IsValidClip(c, director)))
+                return ActionValidity.Valid;
+
+            return ActionValidity.NotApplicable;
+        }
+    }
+
+    [ApplyDefaultUndo]
+    [MenuEntry("Reset Offsets", MenuPriority.CustomClipActionSection.resetOffset), UsedImplicitly]
+    class ResetOffsets : ClipAction
+    {
+        public override bool Execute(IEnumerable<TimelineClip> clips)
+        {
+            AnimationOffsetMenu.ResetClipOffsets(clips.Where(TimelineAnimationUtilities.IsAnimationClip).ToArray());
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TimelineClip> clips)
+        {
+            if (!clips.All(TimelineAnimationUtilities.IsAnimationClip))
+                return ActionValidity.NotApplicable;
+
+            return ActionValidity.Valid;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationClipActions.cs.meta

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+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationClipCurveCache.cs

@@ -0,0 +1,427 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEditor;
+using UnityEditorInternal;
+
+namespace UnityEditor.Timeline
+{
+    struct CurveBindingPair
+    {
+        public EditorCurveBinding binding;
+        public AnimationCurve curve;
+        public ObjectReferenceKeyframe[] objectCurve;
+    }
+
+    class CurveBindingGroup
+    {
+        public CurveBindingPair[] curveBindingPairs { get; set; }
+        public Vector2 timeRange { get; set; }
+        public Vector2 valueRange { get; set; }
+
+        public bool isFloatCurve
+        {
+            get
+            {
+                return curveBindingPairs != null && curveBindingPairs.Length > 0 &&
+                    curveBindingPairs[0].curve != null;
+            }
+        }
+
+        public bool isObjectCurve
+        {
+            get
+            {
+                return curveBindingPairs != null && curveBindingPairs.Length > 0 &&
+                    curveBindingPairs[0].objectCurve != null;
+            }
+        }
+
+        public int count
+        {
+            get
+            {
+                if (curveBindingPairs == null)
+                    return 0;
+                return curveBindingPairs.Length;
+            }
+        }
+    }
+
+    class AnimationClipCurveInfo
+    {
+        bool m_CurveDirty = true;
+        bool m_KeysDirty = true;
+
+        public bool dirty
+        {
+            get { return m_CurveDirty; }
+            set
+            {
+                m_CurveDirty = value;
+                if (m_CurveDirty)
+                {
+                    m_KeysDirty = true;
+                    if (m_groupings != null)
+                        m_groupings.Clear();
+                }
+            }
+        }
+
+        public AnimationCurve[] curves;
+        public EditorCurveBinding[] bindings;
+
+        public EditorCurveBinding[] objectBindings;
+        public List<ObjectReferenceKeyframe[]> objectCurves;
+
+        Dictionary<string, CurveBindingGroup> m_groupings;
+
+        // to tell whether the cache has changed
+        public int version { get; private set; }
+
+        float[] m_KeyTimes;
+
+        Dictionary<EditorCurveBinding, float[]> m_individualBindinsKey;
+
+        public float[] keyTimes
+        {
+            get
+            {
+                if (m_KeysDirty || m_KeyTimes == null)
+                {
+                    RebuildKeyCache();
+                }
+                return m_KeyTimes;
+            }
+        }
+
+        public float[] GetCurveTimes(EditorCurveBinding curve)
+        {
+            return GetCurveTimes(new[] { curve });
+        }
+
+        public float[] GetCurveTimes(EditorCurveBinding[] curves)
+        {
+            if (m_KeysDirty || m_KeyTimes == null)
+            {
+                RebuildKeyCache();
+            }
+
+            var keyTimes = new List<float>();
+            for (int i = 0; i < curves.Length; i++)
+            {
+                var c = curves[i];
+                if (m_individualBindinsKey.ContainsKey(c))
+                {
+                    keyTimes.AddRange(m_individualBindinsKey[c]);
+                }
+            }
+            return keyTimes.ToArray();
+        }
+
+        void RebuildKeyCache()
+        {
+            m_individualBindinsKey = new Dictionary<EditorCurveBinding, float[]>();
+
+            List<float> keys = curves.SelectMany(y => y.keys).Select(z => z.time).ToList();
+            for (int i = 0; i < objectCurves.Count; i++)
+            {
+                var kf = objectCurves[i];
+                keys.AddRange(kf.Select(x => x.time));
+            }
+
+            for (int b = 0; b < bindings.Count(); b++)
+            {
+                m_individualBindinsKey.Add(bindings[b], curves[b].keys.Select(k => k.time).Distinct().ToArray());
+            }
+
+            m_KeyTimes = keys.OrderBy(x => x).Distinct().ToArray();
+            m_KeysDirty = false;
+        }
+
+        public void Update(AnimationClip clip)
+        {
+            List<EditorCurveBinding> postfilter = new List<EditorCurveBinding>();
+            var clipBindings = AnimationUtility.GetCurveBindings(clip);
+            for (int i = 0; i < clipBindings.Length; i++)
+            {
+                var bind = clipBindings[i];
+                if (!bind.propertyName.Contains("LocalRotation.w"))
+                    postfilter.Add(RotationCurveInterpolation.RemapAnimationBindingForRotationCurves(bind, clip));
+            }
+            bindings = postfilter.ToArray();
+
+            curves = new AnimationCurve[bindings.Length];
+            for (int i = 0; i < bindings.Length; i++)
+            {
+                curves[i] = AnimationUtility.GetEditorCurve(clip, bindings[i]);
+            }
+
+            objectBindings = AnimationUtility.GetObjectReferenceCurveBindings(clip);
+            objectCurves = new List<ObjectReferenceKeyframe[]>(objectBindings.Length);
+            for (int i = 0; i < objectBindings.Length; i++)
+            {
+                objectCurves.Add(AnimationUtility.GetObjectReferenceCurve(clip, objectBindings[i]));
+            }
+
+            m_CurveDirty = false;
+            m_KeysDirty = true;
+
+            version = version + 1;
+        }
+
+        public bool GetBindingForCurve(AnimationCurve curve, ref EditorCurveBinding binding)
+        {
+            for (int i = 0; i < curves.Length; i++)
+            {
+                if (curve == curves[i])
+                {
+                    binding = bindings[i];
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        public AnimationCurve GetCurveForBinding(EditorCurveBinding binding)
+        {
+            for (int i = 0; i < curves.Length; i++)
+            {
+                if (binding.Equals(bindings[i]))
+                {
+                    return curves[i];
+                }
+            }
+            return null;
+        }
+
+        public ObjectReferenceKeyframe[] GetObjectCurveForBinding(EditorCurveBinding binding)
+        {
+            if (objectCurves == null)
+                return null;
+
+            for (int i = 0; i < objectCurves.Count; i++)
+            {
+                if (binding.Equals(objectBindings[i]))
+                {
+                    return objectCurves[i];
+                }
+            }
+            return null;
+        }
+
+        // given a groupID, get the list of curve bindings
+        public CurveBindingGroup GetGroupBinding(string groupID)
+        {
+            if (m_groupings == null)
+                m_groupings = new Dictionary<string, CurveBindingGroup>();
+
+            CurveBindingGroup result = null;
+            if (!m_groupings.TryGetValue(groupID, out result))
+            {
+                result = new CurveBindingGroup();
+                result.timeRange = new Vector2(float.MaxValue, float.MinValue);
+                result.valueRange = new Vector2(float.MaxValue, float.MinValue);
+                List<CurveBindingPair> found = new List<CurveBindingPair>();
+                for (int i = 0; i < bindings.Length; i++)
+                {
+                    if (bindings[i].GetGroupID() == groupID)
+                    {
+                        CurveBindingPair pair = new CurveBindingPair();
+                        pair.binding = bindings[i];
+                        pair.curve = curves[i];
+                        found.Add(pair);
+
+                        for (int k = 0; k < curves[i].keys.Length; k++)
+                        {
+                            var key = curves[i].keys[k];
+                            result.timeRange = new Vector2(Mathf.Min(key.time, result.timeRange.x), Mathf.Max(key.time, result.timeRange.y));
+                            result.valueRange = new Vector2(Mathf.Min(key.value, result.valueRange.x), Mathf.Max(key.value, result.valueRange.y));
+                        }
+                    }
+                }
+                for (int i = 0; i < objectBindings.Length; i++)
+                {
+                    if (objectBindings[i].GetGroupID() == groupID)
+                    {
+                        CurveBindingPair pair = new CurveBindingPair();
+                        pair.binding = objectBindings[i];
+                        pair.objectCurve = objectCurves[i];
+                        found.Add(pair);
+
+                        for (int k = 0; k < objectCurves[i].Length; k++)
+                        {
+                            var key = objectCurves[i][k];
+                            result.timeRange = new Vector2(Mathf.Min(key.time, result.timeRange.x), Mathf.Max(key.time, result.timeRange.y));
+                        }
+                    }
+                }
+
+                result.curveBindingPairs = found.OrderBy(x => AnimationWindowUtility.GetComponentIndex(x.binding.propertyName)).ToArray();
+
+                m_groupings.Add(groupID, result);
+            }
+            return result;
+        }
+    }
+
+    // Cache for storing the animation clip data
+    class AnimationClipCurveCache
+    {
+        static AnimationClipCurveCache s_Instance;
+        Dictionary<AnimationClip, AnimationClipCurveInfo> m_ClipCache = new Dictionary<AnimationClip, AnimationClipCurveInfo>();
+        bool m_IsEnabled;
+
+
+        public static AnimationClipCurveCache Instance
+        {
+            get
+            {
+                if (s_Instance == null)
+                {
+                    s_Instance = new AnimationClipCurveCache();
+                }
+
+                return s_Instance;
+            }
+        }
+
+        public void OnEnable()
+        {
+            if (!m_IsEnabled)
+            {
+                AnimationUtility.onCurveWasModified += OnCurveWasModified;
+                m_IsEnabled = true;
+            }
+        }
+
+        public void OnDisable()
+        {
+            if (m_IsEnabled)
+            {
+                AnimationUtility.onCurveWasModified -= OnCurveWasModified;
+                m_IsEnabled = false;
+            }
+        }
+
+        // callback when a curve is edited. Force the cache to update next time it's accessed
+        void OnCurveWasModified(AnimationClip clip, EditorCurveBinding binding, AnimationUtility.CurveModifiedType modification)
+        {
+            AnimationClipCurveInfo data;
+            if (m_ClipCache.TryGetValue(clip, out data))
+            {
+                data.dirty = true;
+            }
+        }
+
+        public AnimationClipCurveInfo GetCurveInfo(AnimationClip clip)
+        {
+            AnimationClipCurveInfo data;
+            if (clip == null)
+                return null;
+            if (!m_ClipCache.TryGetValue(clip, out data))
+            {
+                data = new AnimationClipCurveInfo();
+                data.dirty = true;
+                m_ClipCache[clip] = data;
+            }
+            if (data.dirty)
+            {
+                data.Update(clip);
+            }
+            return data;
+        }
+
+        public void ClearCachedProxyClips()
+        {
+            var toRemove = new List<AnimationClip>();
+            foreach (var entry in m_ClipCache)
+            {
+                var clip = entry.Key;
+                if (clip != null && (clip.hideFlags & HideFlags.HideAndDontSave) == HideFlags.HideAndDontSave)
+                    toRemove.Add(clip);
+            }
+
+            foreach (var clip in toRemove)
+            {
+                m_ClipCache.Remove(clip);
+                Object.DestroyImmediate(clip, true);
+            }
+        }
+
+        public void Clear()
+        {
+            ClearCachedProxyClips();
+            m_ClipCache.Clear();
+        }
+    }
+
+    static class EditorCurveBindingExtension
+    {
+        // identifier to generate an id thats the same for all curves in the same group
+        public static string GetGroupID(this EditorCurveBinding binding)
+        {
+            return binding.type + AnimationWindowUtility.GetPropertyGroupName(binding.propertyName);
+        }
+    }
+
+
+    static class CurveBindingGroupExtensions
+    {
+        // Extentions to determine curve types
+        public static bool IsEnableGroup(this CurveBindingGroup curves)
+        {
+            return curves.isFloatCurve && curves.count == 1 && curves.curveBindingPairs[0].binding.propertyName == "m_Enabled";
+        }
+
+        public static bool IsVectorGroup(this CurveBindingGroup curves)
+        {
+            if (!curves.isFloatCurve)
+                return false;
+            if (curves.count <= 1 || curves.count > 4)
+                return false;
+            char l = curves.curveBindingPairs[0].binding.propertyName.Last();
+            return l == 'x' || l == 'y' || l == 'z' || l == 'w';
+        }
+
+        public static bool IsColorGroup(this CurveBindingGroup curves)
+        {
+            if (!curves.isFloatCurve)
+                return false;
+            if (curves.count != 3 && curves.count != 4)
+                return false;
+            char l = curves.curveBindingPairs[0].binding.propertyName.Last();
+            return l == 'r' || l == 'g' || l == 'b' || l == 'a';
+        }
+
+        public static string GetDescription(this CurveBindingGroup group, float t)
+        {
+            string result = string.Empty;
+            if (group.isFloatCurve)
+            {
+                if (group.count > 1)
+                {
+                    result += "(" + group.curveBindingPairs[0].curve.Evaluate(t).ToString("0.##");
+                    for (int j = 1; j < group.curveBindingPairs.Length; j++)
+                    {
+                        result += "," + group.curveBindingPairs[j].curve.Evaluate(t).ToString("0.##");
+                    }
+                    result += ")";
+                }
+                else
+                {
+                    result = group.curveBindingPairs[0].curve.Evaluate(t).ToString("0.##");
+                }
+            }
+            else if (group.isObjectCurve)
+            {
+                Object obj = null;
+                if (group.curveBindingPairs[0].objectCurve.Length > 0)
+                    obj = CurveEditUtility.Evaluate(group.curveBindingPairs[0].objectCurve, t);
+                result = (obj == null ? "None" : obj.name);
+            }
+
+            return result;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationClipCurveCache.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationClipExtensions.cs

@@ -0,0 +1,34 @@
+using System;
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    static class AnimationClipExtensions
+    {
+        public static UInt64 ClipVersion(this AnimationClip clip)
+        {
+            if (clip == null)
+                return 0;
+
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            var version = (UInt32)info.version;
+            var count = (UInt32)info.curves.Length;
+            var result = (UInt64)version;
+            result |= ((UInt64)count) << 32;
+            return result;
+        }
+
+        public static CurveChangeType GetChangeType(this AnimationClip clip, ref UInt64 curveVersion)
+        {
+            var version = clip.ClipVersion();
+            var changeType = CurveChangeType.None;
+            if ((curveVersion >> 32) != (version >> 32))
+                changeType = CurveChangeType.CurveAddedOrRemoved;
+            else if (curveVersion != version)
+                changeType = CurveChangeType.CurveModified;
+
+            curveVersion = version;
+            return changeType;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationClipExtensions.cs.meta

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+timeCreated: 1602859563

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationOffsetMenu.cs

@@ -0,0 +1,73 @@
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    static class AnimationOffsetMenu
+    {
+        public static string MatchFieldsPrefix = L10n.Tr("Match Offsets Fields/");
+
+        static bool EnforcePreviewMode()
+        {
+            TimelineEditor.state.previewMode = true; // try and set the preview mode
+            if (!TimelineEditor.state.previewMode)
+            {
+                Debug.LogError("Match clips cannot be completed because preview mode cannot be enabed");
+                return false;
+            }
+            return true;
+        }
+
+        internal static void MatchClipsToPrevious(TimelineClip[] clips)
+        {
+            if (!EnforcePreviewMode())
+                return;
+
+            clips = clips.OrderBy(x => x.start).ToArray();
+            foreach (var clip in clips)
+            {
+                var sceneObject = TimelineUtility.GetSceneGameObject(TimelineEditor.inspectedDirector, clip.GetParentTrack());
+                if (sceneObject != null)
+                {
+                    TimelineAnimationUtilities.MatchPrevious(clip, sceneObject.transform, TimelineEditor.inspectedDirector);
+                }
+            }
+
+            InspectorWindow.RepaintAllInspectors();
+            TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+
+        internal static void MatchClipsToNext(TimelineClip[] clips)
+        {
+            if (!EnforcePreviewMode())
+                return;
+
+            clips = clips.OrderByDescending(x => x.start).ToArray();
+            foreach (var clip in clips)
+            {
+                var sceneObject = TimelineUtility.GetSceneGameObject(TimelineEditor.inspectedDirector, clip.GetParentTrack());
+                if (sceneObject != null)
+                {
+                    TimelineAnimationUtilities.MatchNext(clip, sceneObject.transform, TimelineEditor.inspectedDirector);
+                }
+            }
+
+            InspectorWindow.RepaintAllInspectors();
+            TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+
+        public static void ResetClipOffsets(TimelineClip[] clips)
+        {
+            foreach (var clip in clips)
+            {
+                var asset = clip.asset as AnimationPlayableAsset;
+                if (asset != null)
+                    asset.ResetOffsets();
+            }
+
+            InspectorWindow.RepaintAllInspectors();
+            TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationOffsetMenu.cs.meta

@@ -0,0 +1,11 @@
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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationPlayableAssetEditor.cs

@@ -0,0 +1,65 @@
+using JetBrains.Annotations;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [CustomTimelineEditor(typeof(AnimationPlayableAsset)), UsedImplicitly]
+    class AnimationPlayableAssetEditor : ClipEditor
+    {
+        public static readonly string k_NoClipAssignedError = L10n.Tr("No animation clip assigned");
+        public static readonly string k_LegacyClipError = L10n.Tr("Legacy animation clips are not supported");
+        static readonly string k_MotionCurveError = L10n.Tr("You are using motion curves without applyRootMotion enabled on the Animator. The root transform will not be animated");
+        static readonly string k_RootCurveError = L10n.Tr("You are using root curves without applyRootMotion enabled on the Animator. The root transform will not be animated");
+
+        /// <inheritdoc/>
+        public override ClipDrawOptions GetClipOptions(TimelineClip clip)
+        {
+            var clipOptions = base.GetClipOptions(clip);
+            var asset = clip.asset as AnimationPlayableAsset;
+
+            if (asset != null)
+                clipOptions.errorText = GetErrorText(asset, clip.GetParentTrack() as AnimationTrack, clipOptions.errorText);
+
+            if (clip.recordable)
+                clipOptions.highlightColor = DirectorStyles.Instance.customSkin.colorAnimationRecorded;
+
+            return clipOptions;
+        }
+
+        /// <inheritdoc />
+        public override void OnCreate(TimelineClip clip, TrackAsset track, TimelineClip clonedFrom)
+        {
+            var asset = clip.asset as AnimationPlayableAsset;
+            if (asset != null && asset.clip != null && asset.clip.legacy)
+            {
+                asset.clip = null;
+                Debug.LogError("Legacy Animation Clips are not supported");
+            }
+        }
+
+        string GetErrorText(AnimationPlayableAsset animationAsset, AnimationTrack track, string defaultError)
+        {
+            if (animationAsset.clip == null)
+                return k_NoClipAssignedError;
+            if (animationAsset.clip.legacy)
+                return k_LegacyClipError;
+            if (animationAsset.clip.hasMotionCurves || animationAsset.clip.hasRootCurves)
+            {
+                if (track != null && track.trackOffset == TrackOffset.Auto)
+                {
+                    var animator = track.GetBinding(TimelineEditor.inspectedDirector);
+                    if (animator != null && !animator.applyRootMotion && !animationAsset.clip.hasGenericRootTransform)
+                    {
+                        if (animationAsset.clip.hasMotionCurves)
+                            return k_MotionCurveError;
+                        return k_RootCurveError;
+                    }
+                }
+            }
+
+            return defaultError;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationPlayableAssetEditor.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationTrackActions.cs

@@ -0,0 +1,151 @@
+using System.Collections.Generic;
+using System.Linq;
+using JetBrains.Annotations;
+using UnityEditor.Timeline.Actions;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [MenuEntry("Add Override Track", MenuPriority.CustomTrackActionSection.addOverrideTrack), UsedImplicitly]
+    class AddOverrideTrackAction : TrackAction
+    {
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            foreach (var animTrack in tracks.OfType<AnimationTrack>())
+            {
+                TimelineHelpers.CreateTrack(typeof(AnimationTrack), animTrack, "Override " + animTrack.GetChildTracks().Count());
+            }
+
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            if (tracks.Any(t => t.isSubTrack || !t.GetType().IsAssignableFrom(typeof(AnimationTrack))))
+                return ActionValidity.NotApplicable;
+
+            if (tracks.Any(t => t.lockedInHierarchy))
+                return ActionValidity.Invalid;
+
+            return ActionValidity.Valid;
+        }
+    }
+
+    [MenuEntry("Convert To Clip Track", MenuPriority.CustomTrackActionSection.convertToClipMode), UsedImplicitly]
+    class ConvertToClipModeAction : TrackAction
+    {
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            foreach (var animTrack in tracks.OfType<AnimationTrack>())
+                animTrack.ConvertToClipMode();
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            if (tracks.Any(t => !t.GetType().IsAssignableFrom(typeof(AnimationTrack))))
+                return ActionValidity.NotApplicable;
+
+            if (tracks.Any(t => t.lockedInHierarchy))
+                return ActionValidity.Invalid;
+
+            if (tracks.OfType<AnimationTrack>().All(a => a.CanConvertToClipMode()))
+                return ActionValidity.Valid;
+
+            return ActionValidity.NotApplicable;
+        }
+    }
+
+    [MenuEntry("Convert To Infinite Clip", MenuPriority.CustomTrackActionSection.convertFromClipMode), UsedImplicitly]
+    class ConvertFromClipTrackAction : TrackAction
+    {
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            foreach (var animTrack in tracks.OfType<AnimationTrack>())
+                animTrack.ConvertFromClipMode(TimelineEditor.inspectedAsset);
+
+            TimelineEditor.Refresh(RefreshReason.ContentsAddedOrRemoved);
+
+            return true;
+        }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            if (tracks.Any(t => !t.GetType().IsAssignableFrom(typeof(AnimationTrack))))
+                return ActionValidity.NotApplicable;
+
+            if (tracks.Any(t => t.lockedInHierarchy))
+                return ActionValidity.Invalid;
+
+            if (tracks.OfType<AnimationTrack>().All(a => a.CanConvertFromClipMode()))
+                return ActionValidity.Valid;
+
+            return ActionValidity.NotApplicable;
+        }
+    }
+
+    abstract class TrackOffsetBaseAction : TrackAction
+    {
+        public abstract TrackOffset trackOffset { get; }
+
+        public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
+        {
+            if (tracks.Any(t => !t.GetType().IsAssignableFrom(typeof(AnimationTrack))))
+                return ActionValidity.NotApplicable;
+
+            if (tracks.Any(t => t.lockedInHierarchy))
+            {
+                return ActionValidity.Invalid;
+            }
+
+            return ActionValidity.Valid;
+        }
+
+        public override bool Execute(IEnumerable<TrackAsset> tracks)
+        {
+            foreach (var animTrack in tracks.OfType<AnimationTrack>())
+            {
+                animTrack.UnarmForRecord();
+                animTrack.trackOffset = trackOffset;
+            }
+
+            TimelineEditor.Refresh(RefreshReason.ContentsModified);
+            return true;
+        }
+    }
+
+
+    [MenuEntry("Track Offsets/Apply Transform Offsets", MenuPriority.CustomTrackActionSection.applyTrackOffset), UsedImplicitly]
+    [ApplyDefaultUndo]
+    class ApplyTransformOffsetAction : TrackOffsetBaseAction
+    {
+        public override TrackOffset trackOffset
+        {
+            get { return TrackOffset.ApplyTransformOffsets; }
+        }
+    }
+
+    [MenuEntry("Track Offsets/Apply Scene Offsets", MenuPriority.CustomTrackActionSection.applySceneOffset), UsedImplicitly]
+    [ApplyDefaultUndo]
+    class ApplySceneOffsetAction : TrackOffsetBaseAction
+    {
+        public override TrackOffset trackOffset
+        {
+            get { return TrackOffset.ApplySceneOffsets; }
+        }
+    }
+
+    [MenuEntry("Track Offsets/Auto (Deprecated)", MenuPriority.CustomTrackActionSection.applyAutoOffset), UsedImplicitly]
+    [ApplyDefaultUndo]
+    class ApplyAutoAction : TrackOffsetBaseAction
+    {
+        public override TrackOffset trackOffset
+        {
+            get { return TrackOffset.Auto; }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/AnimationTrackActions.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/BindingSelector.cs

@@ -0,0 +1,182 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.IMGUI.Controls;
+using UnityEditorInternal;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    class BindingSelector
+    {
+        TreeViewController m_TreeView;
+        private BindingTreeViewGUI m_TreeViewGUI;
+        public TreeViewController treeViewController
+        {
+            get { return m_TreeView; }
+        }
+
+        TreeViewState m_TrackGlobalTreeViewState;
+        TreeViewState m_TreeViewState;
+        BindingTreeViewDataSource m_TreeViewDataSource;
+        CurveDataSource m_CurveDataSource;
+        TimelineWindow m_Window;
+        CurveEditor m_CurveEditor;
+        ReorderableList m_DopeLines;
+
+        string[] m_StringList = { };
+        int[] m_Selection;
+        bool m_PartOfSelection;
+        public BindingSelector(EditorWindow window, CurveEditor curveEditor, TreeViewState trackGlobalTreeViewState)
+        {
+            m_Window = window as TimelineWindow;
+            m_CurveEditor = curveEditor;
+            m_TrackGlobalTreeViewState = trackGlobalTreeViewState;
+
+            m_DopeLines = new ReorderableList(m_StringList, typeof(string), false, false, false, false);
+            m_DopeLines.drawElementBackgroundCallback = null;
+            m_DopeLines.showDefaultBackground = false;
+            m_DopeLines.index = 0;
+            m_DopeLines.headerHeight = 0;
+            m_DopeLines.elementHeight = 20;
+            m_DopeLines.draggable = false;
+        }
+
+        public void OnGUI(Rect targetRect)
+        {
+            if (m_TreeView == null)
+                return;
+
+            m_TreeView.OnEvent();
+            m_TreeViewGUI.parentWidth = targetRect.width;
+            m_TreeView.OnGUI(targetRect, GUIUtility.GetControlID(FocusType.Passive));
+        }
+
+        public void InitIfNeeded(Rect rect, CurveDataSource dataSource, bool isNewSelection)
+        {
+            if (Event.current.type != EventType.Layout)
+                return;
+
+            m_CurveDataSource = dataSource;
+            var clip = dataSource.animationClip;
+
+            List<EditorCurveBinding> allBindings = new List<EditorCurveBinding>();
+            allBindings.Add(new EditorCurveBinding { propertyName = "Summary" });
+            if (clip != null)
+                allBindings.AddRange(AnimationUtility.GetCurveBindings(clip));
+
+            m_DopeLines.list = allBindings.ToArray();
+
+            if (m_TreeViewState != null)
+            {
+                if (isNewSelection)
+                    RefreshAll();
+
+                return;
+            }
+
+            m_TreeViewState = m_TrackGlobalTreeViewState != null ? m_TrackGlobalTreeViewState : new TreeViewState();
+
+            m_TreeView = new TreeViewController(m_Window, m_TreeViewState)
+            {
+                useExpansionAnimation = false,
+                deselectOnUnhandledMouseDown = true
+            };
+
+            m_TreeView.selectionChangedCallback += OnItemSelectionChanged;
+
+            m_TreeViewDataSource = new BindingTreeViewDataSource(m_TreeView, clip, m_CurveDataSource);
+
+            m_TreeViewGUI = new BindingTreeViewGUI(m_TreeView);
+            m_TreeView.Init(rect, m_TreeViewDataSource, m_TreeViewGUI, null);
+
+            m_TreeViewDataSource.UpdateData();
+
+            RefreshSelection();
+        }
+
+        void OnItemSelectionChanged(int[] selection)
+        {
+            RefreshSelection(selection);
+        }
+
+        void RefreshAll()
+        {
+            RefreshTree();
+            RefreshSelection();
+        }
+
+        void RefreshSelection()
+        {
+            RefreshSelection(m_TreeViewState.selectedIDs != null ? m_TreeViewState.selectedIDs.ToArray() : null);
+        }
+
+        void RefreshSelection(int[] selection)
+        {
+            if (selection == null || selection.Length == 0)
+            {
+                // select all.
+                if (m_TreeViewDataSource.GetRows().Count > 0)
+                {
+                    m_Selection = m_TreeViewDataSource.GetRows().Select(r => r.id).ToArray();
+                }
+            }
+            else
+            {
+                m_Selection = selection;
+            }
+
+            RefreshCurves();
+        }
+
+        public void RefreshCurves()
+        {
+            if (m_CurveDataSource == null || m_Selection == null)
+                return;
+
+            var bindings = new HashSet<EditorCurveBinding>(AnimationPreviewUtilities.EditorCurveBindingComparer.Instance);
+            foreach (int s in m_Selection)
+            {
+                var item = (CurveTreeViewNode)m_TreeView.FindItem(s);
+                if (item != null && item.bindings != null)
+                    bindings.UnionWith(item.bindings);
+            }
+            var wrappers = m_CurveDataSource.GenerateWrappers(bindings);
+            m_CurveEditor.animationCurves = wrappers.ToArray();
+        }
+
+        public void RefreshTree()
+        {
+            if (m_TreeViewDataSource == null)
+                return;
+
+            if (m_Selection == null)
+                m_Selection = new int[0];
+
+            // get the names of the previous items
+            var selected = m_Selection.Select(x => m_TreeViewDataSource.FindItem(x)).Where(t => t != null).Select(c => c.displayName).ToArray();
+
+            // update the source
+            m_TreeViewDataSource.UpdateData();
+
+            // find the same items
+            var reselected = m_TreeViewDataSource.GetRows().Where(x => selected.Contains(x.displayName)).Select(x => x.id).ToArray();
+            if (!reselected.Any())
+            {
+                if (m_TreeViewDataSource.GetRows().Count > 0)
+                {
+                    reselected = new[] { m_TreeViewDataSource.GetItem(0).id };
+                }
+            }
+
+            // update the selection
+            OnItemSelectionChanged(reselected);
+        }
+
+        internal virtual bool IsRenamingNodeAllowed(TreeViewItem node)
+        {
+            return false;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/BindingSelector.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/BindingTreeViewDataSource.cs

@@ -0,0 +1,220 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.IMGUI.Controls;
+using UnityEditorInternal;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+#if !UNITY_2020_2_OR_NEWER
+using L10n = UnityEditor.Timeline.L10n;
+#endif
+
+namespace UnityEditor.Timeline
+{
+    class BindingTreeViewDataSource : TreeViewDataSource
+    {
+        struct BindingGroup : IEquatable<BindingGroup>, IComparable<BindingGroup>
+        {
+            public readonly string GroupName;
+            public readonly string Path;
+            public readonly Type Type;
+
+            public BindingGroup(string path, string groupName, Type type)
+            {
+                Path = path;
+                GroupName = groupName;
+                Type = type;
+            }
+
+            public string groupDisplayName => string.IsNullOrEmpty(Path) ? GroupName : string.Format($"{Path} : {GroupName}");
+            public bool Equals(BindingGroup other) => GroupName == other.GroupName && Type == other.Type && Path == other.Path;
+            public int CompareTo(BindingGroup other) => GetHashCode() - other.GetHashCode();
+            public override bool Equals(object obj) => obj is BindingGroup other && Equals(other);
+            public override int GetHashCode()
+            {
+                return HashUtility.CombineHash(GroupName != null ? GroupName.GetHashCode() : 0, Type != null ? Type.GetHashCode() : 0, Path != null ? Path.GetHashCode() : 0);
+            }
+        }
+
+        static readonly string s_DefaultValue = L10n.Tr("{0} (Default Value)");
+
+        public const int RootID = int.MinValue;
+        public const int GroupID = -1;
+
+        private readonly AnimationClip m_Clip;
+        private readonly CurveDataSource m_CurveDataSource;
+
+        public BindingTreeViewDataSource(
+            TreeViewController treeView, AnimationClip clip, CurveDataSource curveDataSource)
+            : base(treeView)
+        {
+            m_Clip = clip;
+            showRootItem = false;
+            m_CurveDataSource = curveDataSource;
+        }
+
+        void SetupRootNodeSettings()
+        {
+            showRootItem = false;
+            SetExpanded(RootID, true);
+            SetExpanded(GroupID, true);
+        }
+
+        public override void FetchData()
+        {
+            if (m_Clip == null)
+                return;
+
+            var bindings = AnimationUtility.GetCurveBindings(m_Clip)
+                .Union(AnimationUtility.GetObjectReferenceCurveBindings(m_Clip))
+                .ToArray();
+
+            // a sorted linear list of nodes
+            var results = bindings.GroupBy(GetBindingGroup, p => p, CreateTuple)
+                .OrderBy(t => t.Item1.Path)
+                .ThenBy(NamePrioritySort)
+                // this makes component ordering match the animation window
+                .ThenBy(t => t.Item1.Type.ToString())
+                .ThenBy(t => t.Item1.GroupName).ToArray();
+
+            m_RootItem = new CurveTreeViewNode(RootID, null, "root", null)
+            {
+                children = new List<TreeViewItem>(1)
+            };
+
+            if (results.Any())
+            {
+                var groupingNode = new CurveTreeViewNode(GroupID, m_RootItem, m_CurveDataSource.groupingName, bindings)
+                {
+                    children = new List<TreeViewItem>()
+                };
+
+                m_RootItem.children.Add(groupingNode);
+
+                foreach (var r in results)
+                {
+                    var key = r.Item1;
+                    var nodeBindings = r.Item2;
+
+                    FillMissingTransformCurves(nodeBindings);
+                    if (nodeBindings.Count == 1)
+                        groupingNode.children.Add(CreateLeafNode(nodeBindings[0], groupingNode, PropertyName(nodeBindings[0], true)));
+                    else if (nodeBindings.Count > 1)
+                    {
+                        var childBindings = nodeBindings.OrderBy(BindingSort).ToArray();
+                        var parent = new CurveTreeViewNode(key.GetHashCode(), groupingNode, key.groupDisplayName, childBindings) { children = new List<TreeViewItem>() };
+                        groupingNode.children.Add(parent);
+                        foreach (var b in childBindings)
+                            parent.children.Add(CreateLeafNode(b, parent, PropertyName(b, false)));
+                    }
+                }
+                SetupRootNodeSettings();
+            }
+
+            m_NeedRefreshRows = true;
+        }
+
+        public void UpdateData()
+        {
+            m_TreeView.ReloadData();
+        }
+
+        string GroupName(EditorCurveBinding binding)
+        {
+            var propertyName = m_CurveDataSource.ModifyPropertyDisplayName(binding.path, binding.propertyName);
+            return CleanUpArrayBinding(AnimationWindowUtility.NicifyPropertyGroupName(binding.type, propertyName), true);
+        }
+
+        static string CleanUpArrayBinding(string propertyName, bool isGroup)
+        {
+            const string arrayIndicator = ".Array.data[";
+            const string arrayDisplay = ".data[";
+
+            var arrayIndex = propertyName.LastIndexOf(arrayIndicator, StringComparison.Ordinal);
+            if (arrayIndex == -1)
+                return propertyName;
+            if (isGroup)
+                propertyName = propertyName.Substring(0, arrayIndex);
+            return propertyName.Replace(arrayIndicator, arrayDisplay);
+        }
+
+        string PropertyName(EditorCurveBinding binding, bool prependPathName)
+        {
+            var propertyName = m_CurveDataSource.ModifyPropertyDisplayName(binding.path, binding.propertyName);
+            propertyName = CleanUpArrayBinding(AnimationWindowUtility.GetPropertyDisplayName(propertyName), false);
+            if (binding.isPhantom)
+                propertyName = string.Format(s_DefaultValue, propertyName);
+            if (prependPathName && !string.IsNullOrEmpty(binding.path))
+                propertyName = $"{binding.path} : {propertyName}";
+            return propertyName;
+        }
+
+        BindingGroup GetBindingGroup(EditorCurveBinding binding)
+        {
+            return new BindingGroup(binding.path ?? string.Empty, GroupName(binding), binding.type);
+        }
+
+        static CurveTreeViewNode CreateLeafNode(EditorCurveBinding binding, TreeViewItem parent, string displayName)
+        {
+            return new CurveTreeViewNode(binding.GetHashCode(), parent, displayName, new[] { binding }, AnimationWindowUtility.ForceGrouping(binding));
+        }
+
+        static void FillMissingTransformCurves(List<EditorCurveBinding> bindings)
+        {
+            if (!AnimationWindowUtility.IsActualTransformCurve(bindings[0]) || bindings.Count >= 3)
+                return;
+
+            var binding = bindings[0];
+            var prefixPropertyName = binding.propertyName.Split('.').First();
+
+            binding.isPhantom = true;
+            if (!bindings.Any(p => p.propertyName.EndsWith(".x")))
+            {
+                binding.propertyName = prefixPropertyName + ".x";
+                bindings.Insert(0, binding);
+            }
+
+            if (!bindings.Any(p => p.propertyName.EndsWith(".y")))
+            {
+                binding.propertyName = prefixPropertyName + ".y";
+                bindings.Insert(1, binding);
+            }
+
+            if (!bindings.Any(p => p.propertyName.EndsWith(".z")))
+            {
+                binding.propertyName = prefixPropertyName + ".z";
+                bindings.Insert(2, binding);
+            }
+        }
+
+        // make sure vectors and colors are sorted correctly in their subgroups
+        static int BindingSort(EditorCurveBinding b)
+        {
+            return AnimationWindowUtility.GetComponentIndex(b.propertyName);
+        }
+
+        static int NamePrioritySort(ValueTuple<BindingGroup, List<EditorCurveBinding>> group)
+        {
+            if (group.Item1.Type != typeof(Transform))
+                return 0;
+
+            switch (group.Item1.GroupName)
+            {
+                case "Position": return Int32.MinValue;
+                case "Rotation": return Int32.MinValue + 1;
+                case "Scale": return Int32.MinValue + 2;
+                default: return 0;
+            }
+        }
+
+        static ValueTuple<BindingGroup, List<EditorCurveBinding>> CreateTuple(BindingGroup key, IEnumerable<EditorCurveBinding> items)
+        {
+            return new ValueTuple<BindingGroup, List<EditorCurveBinding>>()
+            {
+                Item1 = key,
+                Item2 = items.ToList()
+            };
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/BindingTreeViewDataSource.cs.meta

@@ -0,0 +1,11 @@
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/BindingTreeViewDataSourceGUI.cs

@@ -0,0 +1,126 @@
+using System.Linq;
+using UnityEditor.IMGUI.Controls;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    class BindingTreeViewGUI : TreeViewGUI
+    {
+        const float k_RowRightOffset = 10;
+        const float k_CurveColorIndicatorIconSize = 11;
+        const float k_ColorIndicatorTopMargin = 3;
+
+        static readonly Color s_KeyColorForNonCurves = new Color(0.7f, 0.7f, 0.7f, 0.5f);
+        static readonly Color s_ChildrenCurveLabelColor = new Color(1.0f, 1.0f, 1.0f, 0.7f);
+        static readonly Color s_PhantomPropertyLabelColor = new Color(0.0f, 0.8f, 0.8f, 1f);
+        static readonly Texture2D s_DefaultScriptTexture = EditorGUIUtility.LoadIcon("cs Script Icon");
+        static readonly Texture2D s_TrackDefault = EditorGUIUtility.LoadIcon("UnityEngine/ScriptableObject Icon");
+        public float parentWidth { get; set; }
+
+        public BindingTreeViewGUI(TreeViewController treeView)
+            : base(treeView, true)
+        {
+            k_IconWidth = 13.0f;
+            iconOverlayGUI += OnItemIconOverlay;
+        }
+
+        public override void OnRowGUI(Rect rowRect, TreeViewItem node, int row, bool selected, bool focused)
+        {
+            Color originalColor = GUI.color;
+            bool leafNode = node.parent != null && node.parent.id != BindingTreeViewDataSource.RootID && node.parent.id != BindingTreeViewDataSource.GroupID;
+            GUI.color = Color.white;
+            if (leafNode)
+            {
+                CurveTreeViewNode curveNode = node as CurveTreeViewNode;
+                if (curveNode != null && curveNode.bindings.Any() && curveNode.bindings.First().isPhantom)
+                    GUI.color = s_PhantomPropertyLabelColor;
+                else
+                    GUI.color = s_ChildrenCurveLabelColor;
+            }
+
+            base.OnRowGUI(rowRect, node, row, selected, focused);
+
+            GUI.color = originalColor;
+            DoCurveColorIndicator(rowRect, node as CurveTreeViewNode);
+        }
+
+        protected override bool IsRenaming(int id)
+        {
+            return false;
+        }
+
+        public override bool BeginRename(TreeViewItem item, float delay)
+        {
+            return false;
+        }
+
+        static void DoCurveColorIndicator(Rect rect, CurveTreeViewNode node)
+        {
+            if (node == null)
+                return;
+
+            if (Event.current.type != EventType.Repaint)
+                return;
+
+            Color originalColor = GUI.color;
+
+            if (node.bindings.Length == 1 && !node.bindings[0].isPPtrCurve)
+                GUI.color = CurveUtility.GetPropertyColor(node.bindings[0].propertyName);
+            else
+                GUI.color = s_KeyColorForNonCurves;
+
+            Texture icon = CurveUtility.GetIconCurve();
+
+            rect = new Rect(rect.xMax - k_RowRightOffset - (k_CurveColorIndicatorIconSize / 2) - 5,
+                rect.yMin + k_ColorIndicatorTopMargin + (rect.height - EditorGUIUtility.singleLineHeight) / 2,
+                k_CurveColorIndicatorIconSize,
+                k_CurveColorIndicatorIconSize);
+
+            GUI.DrawTexture(rect, icon, ScaleMode.ScaleToFit, true, 1);
+
+            GUI.color = originalColor;
+        }
+
+        protected override Texture GetIconForItem(TreeViewItem item)
+        {
+            var node = item as CurveTreeViewNode;
+            if (node == null)
+                return null;
+
+            var type = node.iconType;
+            if (type == null)
+                return null;
+
+            // track type icon
+            if (typeof(TrackAsset).IsAssignableFrom(type))
+            {
+                var icon = TrackResourceCache.GetTrackIconForType(type);
+                return icon == s_TrackDefault ? s_DefaultScriptTexture : icon;
+            }
+
+            // custom clip icons always use the script texture
+            if (typeof(PlayableAsset).IsAssignableFrom(type))
+                return s_DefaultScriptTexture;
+
+            // this will return null for MonoBehaviours without a custom icon.
+            // use the scripting icon instead
+            return AssetPreview.GetMiniTypeThumbnail(type) ?? s_DefaultScriptTexture;
+        }
+
+        static void OnItemIconOverlay(TreeViewItem item, Rect rect)
+        {
+            var curveNodeItem = item as CurveTreeViewNode;
+            if (curveNodeItem != null && curveNodeItem.iconOverlay != null)
+                GUI.Label(rect, curveNodeItem.iconOverlay);
+        }
+
+        public override Vector2 GetTotalSize()
+        {
+            var originalSize = base.GetTotalSize();
+            originalSize.x = Mathf.Max(parentWidth, originalSize.x);
+            return originalSize;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/BindingTreeViewDataSourceGUI.cs.meta

@@ -0,0 +1,11 @@
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+guid: 3c09dc5cd0a70cf40856b7d406106ee1
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/ClipCurveEditor.cs

@@ -0,0 +1,367 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.Timeline;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor
+{
+    class ClipCurveEditor
+    {
+        static readonly GUIContent s_RemoveCurveContent = new GUIContent(L10n.Tr("Remove Curve"));
+        static readonly GUIContent s_RemoveCurvesContent = new GUIContent(L10n.Tr("Remove Curves"));
+
+        internal readonly CurveEditor m_CurveEditor;
+        static readonly CurveEditorSettings s_CurveEditorSettings = new CurveEditorSettings
+        {
+            hSlider = false,
+            vSlider = false,
+            hRangeLocked = false,
+            vRangeLocked = false,
+            scaleWithWindow = true,
+            hRangeMin = 0.0f,
+            showAxisLabels = true,
+            allowDeleteLastKeyInCurve = true,
+            rectangleToolFlags = CurveEditorSettings.RectangleToolFlags.MiniRectangleTool
+        };
+
+        static readonly float s_GridLabelWidth = 40.0f;
+
+        readonly BindingSelector m_BindingHierarchy;
+        public BindingSelector bindingHierarchy
+        {
+            get { return m_BindingHierarchy; }
+        }
+
+        public Rect shownAreaInsideMargins
+        {
+            get { return m_CurveEditor != null ? m_CurveEditor.shownAreaInsideMargins : new Rect(1, 1, 1, 1); }
+        }
+
+        Vector2 m_ScrollPosition = Vector2.zero;
+
+        readonly CurveDataSource m_DataSource;
+
+        float m_LastFrameRate = 30.0f;
+
+        UInt64 m_LastClipVersion = UInt64.MaxValue;
+
+        TrackViewModelData m_ViewModel;
+        bool m_ShouldRestoreShownArea;
+
+        bool isNewSelection
+        {
+            get
+            {
+                if (m_ViewModel == null || m_DataSource == null)
+                    return true;
+
+                return m_ViewModel.lastInlineCurveDataID != m_DataSource.id;
+            }
+        }
+
+        internal CurveEditor curveEditor
+        {
+            get { return m_CurveEditor; }
+        }
+
+        public ClipCurveEditor(CurveDataSource dataSource, TimelineWindow parentWindow, TrackAsset hostTrack)
+        {
+            m_DataSource = dataSource;
+
+            m_CurveEditor = new CurveEditor(new Rect(0, 0, 1000, 100), new CurveWrapper[0], false);
+
+            s_CurveEditorSettings.vTickStyle = new TickStyle
+            {
+                tickColor = { color = DirectorStyles.Instance.customSkin.colorInlineCurveVerticalLines },
+                distLabel = 20,
+                stubs = true
+            };
+
+            s_CurveEditorSettings.hTickStyle = new TickStyle
+            {
+                // hide horizontal lines by giving them a transparent color
+                tickColor = { color = new Color(0.0f, 0.0f, 0.0f, 0.0f) },
+                distLabel = 0
+            };
+
+            m_CurveEditor.settings = s_CurveEditorSettings;
+
+            m_ViewModel = TimelineWindowViewPrefs.GetTrackViewModelData(hostTrack);
+
+            m_ShouldRestoreShownArea = true;
+            m_CurveEditor.ignoreScrollWheelUntilClicked = true;
+            m_CurveEditor.curvesUpdated = OnCurvesUpdated;
+
+            m_BindingHierarchy = new BindingSelector(parentWindow, m_CurveEditor, m_ViewModel.inlineCurvesState);
+        }
+
+        public void SelectAllKeys()
+        {
+            m_CurveEditor.SelectAll();
+        }
+
+        public void FrameClip()
+        {
+            m_CurveEditor.InvalidateBounds();
+            m_CurveEditor.FrameClip(false, true);
+        }
+
+        public CurveDataSource dataSource
+        {
+            get { return m_DataSource; }
+        }
+
+        // called when curves are edited
+        internal void OnCurvesUpdated()
+        {
+            if (m_DataSource == null)
+                return;
+
+            if (m_CurveEditor == null)
+                return;
+
+            if (m_CurveEditor.animationCurves.Length == 0)
+                return;
+
+            List<CurveWrapper> curvesToUpdate = m_CurveEditor.animationCurves.Where(c => c.changed).ToList();
+
+            // nothing changed, return.
+            if (curvesToUpdate.Count == 0)
+                return;
+
+            // something changed, manage the undo properly.
+            m_DataSource.ApplyCurveChanges(curvesToUpdate);
+            m_LastClipVersion = m_DataSource.GetClipVersion();
+        }
+
+        public void DrawHeader(Rect headerRect)
+        {
+            m_BindingHierarchy.InitIfNeeded(headerRect, m_DataSource, isNewSelection);
+
+            try
+            {
+                GUILayout.BeginArea(headerRect);
+                m_ScrollPosition = GUILayout.BeginScrollView(m_ScrollPosition, GUIStyle.none, GUI.skin.verticalScrollbar);
+                m_BindingHierarchy.OnGUI(new Rect(0, 0, headerRect.width, headerRect.height));
+                if (m_BindingHierarchy.treeViewController != null)
+                    m_BindingHierarchy.treeViewController.contextClickItemCallback = ContextClickItemCallback;
+                GUILayout.EndScrollView();
+                GUILayout.EndArea();
+            }
+            catch (Exception e)
+            {
+                Debug.LogException(e);
+            }
+        }
+
+        void ContextClickItemCallback(int obj)
+        {
+            GenerateContextMenu(obj);
+        }
+
+        void GenerateContextMenu(int obj = -1)
+        {
+            if (Event.current.type != EventType.ContextClick)
+                return;
+
+            var selectedCurves = GetSelectedProperties().ToArray();
+            if (selectedCurves.Length > 0)
+            {
+                var menu = new GenericMenu();
+                var content = selectedCurves.Length == 1 ? s_RemoveCurveContent : s_RemoveCurvesContent;
+                menu.AddItem(content,
+                    false,
+                    () => RemoveCurves(selectedCurves)
+                );
+                menu.ShowAsContext();
+            }
+        }
+
+        public IEnumerable<EditorCurveBinding> GetSelectedProperties(bool useForcedGroups = false)
+        {
+            var bindings = new HashSet<EditorCurveBinding>();
+            var bindingTree = m_BindingHierarchy.treeViewController.data as BindingTreeViewDataSource;
+            foreach (var selectedId in m_BindingHierarchy.treeViewController.GetSelection())
+            {
+                var node = bindingTree.FindItem(selectedId) as CurveTreeViewNode;
+                if (node == null)
+                    continue;
+
+                var curveNodeParent = node.parent as CurveTreeViewNode;
+                if (useForcedGroups && node.forceGroup && curveNodeParent != null)
+                    bindings.UnionWith(curveNodeParent.bindings);
+                else
+                    bindings.UnionWith(node.bindings);
+            }
+            return bindings;
+        }
+
+        public void RemoveCurves(IEnumerable<EditorCurveBinding> bindings)
+        {
+            m_DataSource.RemoveCurves(bindings);
+            m_BindingHierarchy.RefreshTree();
+            TimelineWindow.instance.state.CalculateRowRects();
+            m_LastClipVersion = m_DataSource.GetClipVersion();
+        }
+
+        class CurveEditorState : ICurveEditorState
+        {
+            public TimeArea.TimeFormat timeFormat { get; set; }
+            public Vector2 timeRange => new Vector2(0, 1);
+            public bool rippleTime => false;
+        }
+
+        void UpdateCurveEditorIfNeeded(WindowState state)
+        {
+            if ((Event.current.type != EventType.Layout) || (m_DataSource == null) || (m_BindingHierarchy == null))
+                return;
+
+            // check if the curves have changed externally
+            var curveChange = m_DataSource.UpdateExternalChanges(ref m_LastClipVersion);
+            if (curveChange == CurveChangeType.None)
+                return;
+
+            if (curveChange == CurveChangeType.CurveAddedOrRemoved)
+                m_BindingHierarchy.RefreshTree();
+            else // curve modified
+                m_BindingHierarchy.RefreshCurves();
+
+            m_CurveEditor.InvalidateSelectionBounds();
+
+            m_CurveEditor.state = new CurveEditorState() { timeFormat = state.timeFormat.ToTimeAreaFormat() };
+            m_CurveEditor.invSnap = (float)state.referenceSequence.frameRate;
+        }
+
+        public void DrawCurveEditor(Rect rect, WindowState state, Vector2 clipRange, bool loop, bool selected)
+        {
+            SetupMarginsAndRect(rect, state);
+            UpdateCurveEditorIfNeeded(state);
+
+            if (m_ShouldRestoreShownArea)
+                RestoreShownArea();
+
+            var curveVisibleTimeRange = CalculateCurveVisibleTimeRange(state.timeAreaShownRange, m_DataSource);
+            m_CurveEditor.SetShownHRangeInsideMargins(curveVisibleTimeRange.x, curveVisibleTimeRange.y); //align the curve with the clip.
+
+            if (m_LastFrameRate != state.referenceSequence.frameRate)
+            {
+                m_CurveEditor.hTicks.SetTickModulosForFrameRate((float)state.referenceSequence.frameRate);
+                m_LastFrameRate = (float)state.referenceSequence.frameRate;
+            }
+
+            foreach (var cw in m_CurveEditor.animationCurves)
+                cw.renderer.SetWrap(WrapMode.Default, loop ? WrapMode.Loop : WrapMode.Default);
+
+            using (new GUIGroupScope(rect))
+            {
+                var localRect = new Rect(0.0f, 0.0f, rect.width, rect.height);
+                var localClipRange = new Vector2(Mathf.Floor(clipRange.x - rect.xMin), Mathf.Ceil(clipRange.y - rect.xMin));
+                var curveStartPosX = Mathf.Floor(state.TimeToPixel(m_DataSource.start) - rect.xMin);
+
+                EditorGUI.DrawRect(new Rect(curveStartPosX, 0.0f, 1.0f, rect.height), new Color(1.0f, 1.0f, 1.0f, 0.5f));
+                DrawCurveEditorBackground(localRect);
+
+                if (selected)
+                {
+                    var selectionRect = new Rect(localClipRange.x, 0.0f, localClipRange.y - localClipRange.x, localRect.height);
+                    DrawOutline(selectionRect);
+                }
+
+                EditorGUI.BeginChangeCheck();
+                {
+                    var evt = Event.current;
+                    if (evt.type == EventType.Layout || evt.type == EventType.Repaint || selected)
+                        m_CurveEditor.CurveGUI();
+                }
+                if (EditorGUI.EndChangeCheck())
+                    OnCurvesUpdated();
+
+                DrawOverlay(localRect, localClipRange, DirectorStyles.Instance.customSkin.colorInlineCurveOutOfRangeOverlay);
+                DrawGrid(localRect, curveStartPosX);
+            }
+        }
+
+        static Vector2 CalculateCurveVisibleTimeRange(Vector2 timeAreaShownRange, CurveDataSource curve)
+        {
+            var curveVisibleTimeRange = new Vector2
+            {
+                x = Math.Max(0.0f, timeAreaShownRange.x - curve.start),
+                y = timeAreaShownRange.y - curve.start
+            };
+            return curveVisibleTimeRange * curve.timeScale;
+        }
+
+        void SetupMarginsAndRect(Rect rect, WindowState state)
+        {
+            var startX = state.TimeToPixel(m_DataSource.start) - rect.x;
+            var timelineWidth = state.timeAreaRect.width;
+            m_CurveEditor.rect = new Rect(0.0f, 0.0f, timelineWidth, rect.height);
+            m_CurveEditor.leftmargin = Math.Max(startX, 0.0f);
+            m_CurveEditor.rightmargin = 0.0f;
+            m_CurveEditor.topmargin = m_CurveEditor.bottommargin = CalculateTopMargin(rect.height);
+        }
+
+        void RestoreShownArea()
+        {
+            if (isNewSelection)
+                FrameClip();
+            else
+                m_CurveEditor.shownAreaInsideMargins = m_ViewModel.inlineCurvesShownAreaInsideMargins;
+            m_ShouldRestoreShownArea = false;
+        }
+
+        static void DrawCurveEditorBackground(Rect rect)
+        {
+            if (EditorGUIUtility.isProSkin)
+                return;
+
+            var animEditorBackgroundRect = Rect.MinMaxRect(0.0f, rect.yMin, rect.xMax, rect.yMax);
+
+            // Curves are not legible in Personal Skin so we need to darken the background a bit.
+            EditorGUI.DrawRect(animEditorBackgroundRect, DirectorStyles.Instance.customSkin.colorInlineCurvesBackground);
+        }
+
+        static float CalculateTopMargin(float height)
+        {
+            return Mathf.Clamp(0.15f * height, 10.0f, 40.0f);
+        }
+
+        static void DrawOutline(Rect rect, float thickness = 2.0f)
+        {
+            // Draw top selected lines.
+            EditorGUI.DrawRect(new Rect(rect.xMin, rect.yMin, rect.width, thickness), Color.white);
+
+            // Draw bottom selected lines.
+            EditorGUI.DrawRect(new Rect(rect.xMin, rect.yMax - thickness, rect.width, thickness), Color.white);
+
+            // Draw Left Selected Lines
+            EditorGUI.DrawRect(new Rect(rect.xMin, rect.yMin, thickness, rect.height), Color.white);
+
+            // Draw Right Selected Lines
+            EditorGUI.DrawRect(new Rect(rect.xMax - thickness, rect.yMin, thickness, rect.height), Color.white);
+        }
+
+        static void DrawOverlay(Rect rect, Vector2 clipRange, Color color)
+        {
+            var leftSide = new Rect(rect.xMin, rect.yMin, clipRange.x - rect.xMin, rect.height);
+            EditorGUI.DrawRect(leftSide, color);
+
+            var rightSide = new Rect(Mathf.Max(0.0f, clipRange.y), rect.yMin, rect.xMax, rect.height);
+            EditorGUI.DrawRect(rightSide, color);
+        }
+
+        void DrawGrid(Rect rect, float curveXPosition)
+        {
+            var gridXPos = Mathf.Max(curveXPosition - s_GridLabelWidth, rect.xMin);
+            var gridRect = new Rect(gridXPos, rect.y, s_GridLabelWidth, rect.height);
+            var originalRect = m_CurveEditor.rect;
+
+            m_CurveEditor.rect = new Rect(0.0f, 0.0f, rect.width, rect.height);
+            using (new GUIGroupScope(gridRect))
+                m_CurveEditor.GridGUI();
+            m_CurveEditor.rect = originalRect;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/ClipCurveEditor.cs.meta

@@ -0,0 +1,11 @@
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/CurveDataSource.cs

@@ -0,0 +1,439 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    enum CurveChangeType
+    {
+        None,
+        CurveModified,
+        CurveAddedOrRemoved
+    }
+
+    abstract class CurveDataSource
+    {
+        public static CurveDataSource Create(IRowGUI trackGUI)
+        {
+            if (trackGUI.asset is AnimationTrack)
+                return new InfiniteClipCurveDataSource(trackGUI);
+
+            return new TrackParametersCurveDataSource(trackGUI);
+        }
+
+        public static CurveDataSource Create(TimelineClipGUI clipGUI)
+        {
+            if (clipGUI.clip.animationClip != null)
+                return new ClipAnimationCurveDataSource(clipGUI);
+
+            return new ClipParametersCurveDataSource(clipGUI);
+        }
+
+        int? m_ID = null;
+        public int id
+        {
+            get
+            {
+                if (!m_ID.HasValue)
+                    m_ID = CreateHashCode();
+
+                return m_ID.Value;
+            }
+        }
+
+        readonly IRowGUI m_TrackGUI;
+        protected CurveDataSource(IRowGUI trackGUI)
+        {
+            m_TrackGUI = trackGUI;
+        }
+
+        public abstract AnimationClip animationClip { get; }
+
+        public abstract float start { get; }
+        public abstract float timeScale { get; }
+        public abstract string groupingName { get; }
+
+        // Applies changes from the visual curve in the curve wrapper back to the animation clips
+        public virtual void ApplyCurveChanges(IEnumerable<CurveWrapper> updatedCurves)
+        {
+            Undo.RegisterCompleteObjectUndo(animationClip, "Edit Clip Curve");
+            foreach (CurveWrapper c in updatedCurves)
+            {
+                if (c.curve.length > 0)
+                    AnimationUtility.SetEditorCurve(animationClip, c.binding, c.curve);
+                else
+                    RemoveCurves(new[] { c.binding });
+                c.changed = false;
+            }
+        }
+
+        /// <summary>The clip version is a value that will change when a curve gets updated.
+        /// it's used to detect when an animation clip has been changed externally </summary>
+        /// <returns>A versioning value indicating the state of the curve. If the curve is updated externally this value will change. </returns>
+        public virtual UInt64 GetClipVersion()
+        {
+            return animationClip.ClipVersion();
+        }
+
+        /// <summary>Call this method to check if the underlying clip has changed</summary>
+        /// <param name="curveVersion">A versioning value. This will be updated to the latest version</param>
+        /// <returns>A value indicating how the clip has changed</returns>
+        public virtual CurveChangeType UpdateExternalChanges(ref UInt64 curveVersion)
+        {
+            return animationClip.GetChangeType(ref curveVersion);
+        }
+
+        public virtual string ModifyPropertyDisplayName(string path, string propertyName) => propertyName;
+
+        public virtual void RemoveCurves(IEnumerable<EditorCurveBinding> bindings)
+        {
+            Undo.RegisterCompleteObjectUndo(animationClip, "Remove Curve(s)");
+            foreach (var binding in bindings)
+            {
+                if (binding.isPPtrCurve)
+                    AnimationUtility.SetObjectReferenceCurve(animationClip, binding, null);
+                else
+                    AnimationUtility.SetEditorCurve(animationClip, binding, null);
+            }
+        }
+
+        public Rect GetBackgroundRect(WindowState state)
+        {
+            var trackRect = m_TrackGUI.boundingRect;
+            return new Rect(
+                state.timeAreaTranslation.x + trackRect.xMin,
+                trackRect.y,
+                (float)state.editSequence.asset.duration * state.timeAreaScale.x,
+                trackRect.height
+            );
+        }
+
+        public List<CurveWrapper> GenerateWrappers(IEnumerable<EditorCurveBinding> bindings)
+        {
+            var wrappers = new List<CurveWrapper>(bindings.Count());
+            int curveWrapperId = 0;
+
+            foreach (EditorCurveBinding b in bindings)
+            {
+                // General configuration
+                var wrapper = new CurveWrapper
+                {
+                    id = curveWrapperId++,
+                    binding = b,
+                    groupId = -1,
+                    hidden = false,
+                    readOnly = false,
+                    getAxisUiScalarsCallback = () => new Vector2(1, 1)
+                };
+
+                // Specific configuration
+                ConfigureCurveWrapper(wrapper);
+
+                wrappers.Add(wrapper);
+            }
+
+            return wrappers;
+        }
+
+        protected virtual void ConfigureCurveWrapper(CurveWrapper wrapper)
+        {
+            wrapper.color = CurveUtility.GetPropertyColor(wrapper.binding.propertyName);
+            wrapper.renderer = new NormalCurveRenderer(AnimationUtility.GetEditorCurve(animationClip, wrapper.binding));
+            wrapper.renderer.SetCustomRange(0.0f, animationClip.length);
+        }
+
+        protected virtual int CreateHashCode()
+        {
+            return m_TrackGUI.asset.GetHashCode();
+        }
+    }
+
+    class ClipAnimationCurveDataSource : CurveDataSource
+    {
+        static readonly string k_GroupingName = L10n.Tr("Animated Values");
+
+        readonly TimelineClipGUI m_ClipGUI;
+
+        public ClipAnimationCurveDataSource(TimelineClipGUI clipGUI) : base(clipGUI.parent)
+        {
+            m_ClipGUI = clipGUI;
+        }
+
+        public override AnimationClip animationClip
+        {
+            get { return m_ClipGUI.clip.animationClip; }
+        }
+
+        public override float start
+        {
+            get { return (float)m_ClipGUI.clip.FromLocalTimeUnbound(0.0); }
+        }
+
+        public override float timeScale
+        {
+            get { return (float)m_ClipGUI.clip.timeScale; }
+        }
+
+        public override string groupingName
+        {
+            get { return k_GroupingName; }
+        }
+
+        protected override int CreateHashCode()
+        {
+            return base.CreateHashCode().CombineHash(m_ClipGUI.clip.GetHashCode());
+        }
+
+        public override string ModifyPropertyDisplayName(string path, string propertyName)
+        {
+            if (!AnimatedPropertyUtility.IsMaterialProperty(propertyName))
+                return propertyName;
+
+            var track = m_ClipGUI.clip.GetParentTrack();
+            if (track == null)
+                return propertyName;
+
+            var gameObjectBinding = TimelineUtility.GetSceneGameObject(TimelineEditor.inspectedDirector, track);
+            if (gameObjectBinding == null)
+                return propertyName;
+
+            if (!string.IsNullOrEmpty(path))
+            {
+                var transform = gameObjectBinding.transform.Find(path);
+                if (transform == null)
+                    return propertyName;
+                gameObjectBinding = transform.gameObject;
+            }
+
+            return AnimatedPropertyUtility.RemapMaterialName(gameObjectBinding, propertyName);
+        }
+    }
+
+    class ClipParametersCurveDataSource : CurveDataSource
+    {
+        static readonly string k_GroupingName = L10n.Tr("Clip Properties");
+
+        readonly TimelineClipGUI m_ClipGUI;
+        readonly CurvesProxy m_CurvesProxy;
+
+        private int m_ClipDirtyVersion;
+
+        public ClipParametersCurveDataSource(TimelineClipGUI clipGUI) : base(clipGUI.parent)
+        {
+            m_ClipGUI = clipGUI;
+            m_CurvesProxy = new CurvesProxy(clipGUI.clip);
+        }
+
+        public override AnimationClip animationClip
+        {
+            get { return m_CurvesProxy.curves; }
+        }
+
+        public override UInt64 GetClipVersion()
+        {
+            return sourceAnimationClip.ClipVersion();
+        }
+
+        public override CurveChangeType UpdateExternalChanges(ref ulong curveVersion)
+        {
+            if (m_ClipGUI == null || m_ClipGUI.clip == null)
+                return CurveChangeType.None;
+
+            var changeType = sourceAnimationClip.GetChangeType(ref curveVersion);
+            if (changeType != CurveChangeType.None)
+            {
+                m_CurvesProxy.ApplyExternalChangesToProxy();
+            }
+            else if (m_ClipDirtyVersion != m_ClipGUI.clip.DirtyIndex)
+            {
+                m_CurvesProxy.UpdateProxyCurves();
+                if (changeType == CurveChangeType.None)
+                    changeType = CurveChangeType.CurveModified;
+            }
+            m_ClipDirtyVersion = m_ClipGUI.clip.DirtyIndex;
+            return changeType;
+        }
+
+        public override float start
+        {
+            get { return (float)m_ClipGUI.clip.FromLocalTimeUnbound(0.0); }
+        }
+
+        public override float timeScale
+        {
+            get { return (float)m_ClipGUI.clip.timeScale; }
+        }
+
+        public override string groupingName
+        {
+            get { return k_GroupingName; }
+        }
+
+        public override void RemoveCurves(IEnumerable<EditorCurveBinding> bindings)
+        {
+            m_CurvesProxy.RemoveCurves(bindings);
+        }
+
+        public override void ApplyCurveChanges(IEnumerable<CurveWrapper> updatedCurves)
+        {
+            m_CurvesProxy.UpdateCurves(updatedCurves);
+        }
+
+        protected override void ConfigureCurveWrapper(CurveWrapper wrapper)
+        {
+            m_CurvesProxy.ConfigureCurveWrapper(wrapper);
+        }
+
+        protected override int CreateHashCode()
+        {
+            return base.CreateHashCode().CombineHash(m_ClipGUI.clip.GetHashCode());
+        }
+
+        private AnimationClip sourceAnimationClip
+        {
+            get
+            {
+                if (m_ClipGUI == null || m_ClipGUI.clip == null || m_ClipGUI.clip.curves == null)
+                    return null;
+                return m_ClipGUI.clip.curves;
+            }
+        }
+    }
+
+    class InfiniteClipCurveDataSource : CurveDataSource
+    {
+        static readonly string k_GroupingName = L10n.Tr("Animated Values");
+
+        readonly AnimationTrack m_AnimationTrack;
+
+        public InfiniteClipCurveDataSource(IRowGUI trackGui) : base(trackGui)
+        {
+            m_AnimationTrack = trackGui.asset as AnimationTrack;
+        }
+
+        public override AnimationClip animationClip
+        {
+            get { return m_AnimationTrack.infiniteClip; }
+        }
+
+        public override float start
+        {
+            get { return 0.0f; }
+        }
+
+        public override float timeScale
+        {
+            get { return 1.0f; }
+        }
+
+        public override string groupingName
+        {
+            get { return k_GroupingName; }
+        }
+
+        public override string ModifyPropertyDisplayName(string path, string propertyName)
+        {
+            if (m_AnimationTrack == null || !AnimatedPropertyUtility.IsMaterialProperty(propertyName))
+                return propertyName;
+
+            var binding = m_AnimationTrack.GetBinding(TimelineEditor.inspectedDirector);
+            if (binding == null)
+                return propertyName;
+
+            var target = binding.transform;
+            if (!string.IsNullOrEmpty(path))
+                target = target.Find(path);
+
+            if (target == null)
+                return propertyName;
+
+            return AnimatedPropertyUtility.RemapMaterialName(target.gameObject, propertyName);
+        }
+    }
+
+    class TrackParametersCurveDataSource : CurveDataSource
+    {
+        static readonly string k_GroupingName = L10n.Tr("Track Properties");
+
+        readonly CurvesProxy m_CurvesProxy;
+        private int m_TrackDirtyVersion;
+
+        public TrackParametersCurveDataSource(IRowGUI trackGui) : base(trackGui)
+        {
+            m_CurvesProxy = new CurvesProxy(trackGui.asset);
+        }
+
+        public override AnimationClip animationClip
+        {
+            get { return m_CurvesProxy.curves; }
+        }
+
+        public override UInt64 GetClipVersion()
+        {
+            return sourceAnimationClip.ClipVersion();
+        }
+
+        public override CurveChangeType UpdateExternalChanges(ref ulong curveVersion)
+        {
+            if (m_CurvesProxy.targetTrack == null)
+                return CurveChangeType.None;
+
+            var changeType = sourceAnimationClip.GetChangeType(ref curveVersion);
+            if (changeType != CurveChangeType.None)
+            {
+                m_CurvesProxy.ApplyExternalChangesToProxy();
+            }
+            // track property has changed externally, update the curve proxies
+            else if (m_TrackDirtyVersion != m_CurvesProxy.targetTrack.DirtyIndex)
+            {
+                if (changeType == CurveChangeType.None)
+                    changeType = CurveChangeType.CurveModified;
+                m_CurvesProxy.UpdateProxyCurves();
+            }
+            m_TrackDirtyVersion = m_CurvesProxy.targetTrack.DirtyIndex;
+            return changeType;
+        }
+
+        public override float start
+        {
+            get { return 0.0f; }
+        }
+
+        public override float timeScale
+        {
+            get { return 1.0f; }
+        }
+
+        public override string groupingName
+        {
+            get { return k_GroupingName; }
+        }
+
+        public override void RemoveCurves(IEnumerable<EditorCurveBinding> bindings)
+        {
+            m_CurvesProxy.RemoveCurves(bindings);
+        }
+
+        public override void ApplyCurveChanges(IEnumerable<CurveWrapper> updatedCurves)
+        {
+            m_CurvesProxy.UpdateCurves(updatedCurves);
+        }
+
+        protected override void ConfigureCurveWrapper(CurveWrapper wrapper)
+        {
+            m_CurvesProxy.ConfigureCurveWrapper(wrapper);
+        }
+
+        private AnimationClip sourceAnimationClip
+        {
+            get
+            {
+                if (m_CurvesProxy.targetTrack == null || m_CurvesProxy.targetTrack.curves == null)
+                    return null;
+                return m_CurvesProxy.targetTrack.curves;
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/CurveDataSource.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 87a1ae9719ec25d44a4dbec20ec0f892
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/CurveTreeViewNode.cs

@@ -0,0 +1,39 @@
+using System.Linq;
+using UnityEditor.IMGUI.Controls;
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    class CurveTreeViewNode : TreeViewItem
+    {
+        public bool forceGroup { get; }
+        public System.Type iconType { get; }
+        public GUIContent iconOverlay { get; }
+
+        EditorCurveBinding[] m_Bindings;
+
+        public EditorCurveBinding[] bindings
+        {
+            get { return m_Bindings; }
+        }
+
+        public CurveTreeViewNode(int id, TreeViewItem parent, string displayName, EditorCurveBinding[] bindings, bool _forceGroup = false)
+            : base(id, parent != null ? parent.depth + 1 : -1, parent, displayName)
+        {
+            m_Bindings = bindings;
+            forceGroup = _forceGroup;
+
+
+            // capture the preview icon type. If all subbindings are the same type, use that. Otherwise use null as a default
+            iconType = null;
+            if (parent != null && parent.depth >= 0 && bindings != null && bindings.Length > 0 && bindings.All(b => b.type == bindings[0].type))
+            {
+                iconType = bindings[0].type;
+
+                // for components put the component type in a tooltip
+                if (iconType != null && typeof(Component).IsAssignableFrom(iconType))
+                    iconOverlay = new GUIContent(string.Empty, ObjectNames.NicifyVariableName(iconType.Name));
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/CurveTreeViewNode.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 1ec45eaf72174ca189827d7896952167
+timeCreated: 1599683561

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/CurvesProxy.cs

@@ -0,0 +1,359 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using JetBrains.Annotations;
+using UnityEngine;
+using UnityEngine.Timeline;
+using UnityObject = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    class CurvesProxy : ICurvesOwner
+    {
+        public AnimationClip curves
+        {
+            get { return proxyCurves != null ? proxyCurves : m_OriginalOwner.curves; }
+        }
+
+        public bool hasCurves
+        {
+            get { return m_IsAnimatable || m_OriginalOwner.hasCurves; }
+        }
+
+        public double duration
+        {
+            get { return m_OriginalOwner.duration; }
+        }
+
+        public string defaultCurvesName
+        {
+            get { return m_OriginalOwner.defaultCurvesName; }
+        }
+
+        public UnityObject asset
+        {
+            get { return m_OriginalOwner.asset; }
+        }
+
+        public UnityObject assetOwner
+        {
+            get { return m_OriginalOwner.assetOwner; }
+        }
+
+        public TrackAsset targetTrack
+        {
+            get { return m_OriginalOwner.targetTrack; }
+        }
+
+        readonly ICurvesOwner m_OriginalOwner;
+        readonly bool m_IsAnimatable;
+        readonly Dictionary<EditorCurveBinding, SerializedProperty> m_PropertiesMap = new Dictionary<EditorCurveBinding, SerializedProperty>();
+        int m_ProxyIsRebuilding = 0;
+
+        AnimationClip m_ProxyCurves;
+        AnimationClip proxyCurves
+        {
+            get
+            {
+                if (!m_IsAnimatable) return null;
+
+                if (m_ProxyCurves == null)
+                    RebuildProxyCurves();
+
+                return m_ProxyCurves;
+            }
+        }
+
+        public CurvesProxy([NotNull] ICurvesOwner originalOwner)
+        {
+            m_OriginalOwner = originalOwner;
+            m_IsAnimatable = originalOwner.HasAnyAnimatableParameters();
+
+            RebuildProxyCurves();
+        }
+
+        public void CreateCurves(string curvesClipName)
+        {
+            m_OriginalOwner.CreateCurves(curvesClipName);
+            TimelineEditor.window.state.rebuildGraph = true;
+        }
+
+        public void ConfigureCurveWrapper(CurveWrapper wrapper)
+        {
+            var color = CurveUtility.GetPropertyColor(wrapper.binding.propertyName);
+            wrapper.color = color;
+
+            float h, s, v;
+            Color.RGBToHSV(color, out h, out s, out v);
+            wrapper.wrapColorMultiplier = Color.HSVToRGB(h, s * 0.33f, v * 1.15f);
+
+            var curve = AnimationUtility.GetEditorCurve(proxyCurves, wrapper.binding);
+
+            wrapper.renderer = new NormalCurveRenderer(curve);
+
+            // Use curve length instead of animation clip length
+            wrapper.renderer.SetCustomRange(0.0f, curve.keys.Last().time);
+        }
+
+        public void RebuildCurves()
+        {
+            RebuildProxyCurves();
+        }
+
+        public void RemoveCurves(IEnumerable<EditorCurveBinding> bindings)
+        {
+            if (m_ProxyIsRebuilding > 0 || !m_OriginalOwner.hasCurves)
+                return;
+
+            Undo.RegisterCompleteObjectUndo(m_OriginalOwner.curves, L10n.Tr("Remove Clip Curve"));
+            foreach (var binding in bindings)
+                AnimationUtility.SetEditorCurve(m_OriginalOwner.curves, binding, null);
+            m_OriginalOwner.SanitizeCurvesData();
+            RebuildProxyCurves();
+        }
+
+        public void UpdateCurves(IEnumerable<CurveWrapper> updatedCurves)
+        {
+            if (m_ProxyIsRebuilding > 0)
+                return;
+
+            Undo.RegisterCompleteObjectUndo(m_OriginalOwner.asset, L10n.Tr("Edit Clip Curve"));
+            if (m_OriginalOwner.curves != null)
+                Undo.RegisterCompleteObjectUndo(m_OriginalOwner.curves, L10n.Tr("Edit Clip Curve"));
+
+            var requireRebuild = false;
+            foreach (var curve in updatedCurves)
+            {
+                requireRebuild |= curve.curve.length == 0;
+                UpdateCurve(curve.binding, curve.curve);
+            }
+
+            if (requireRebuild)
+                m_OriginalOwner.SanitizeCurvesData();
+
+            AnimatedParameterUtility.UpdateSerializedPlayableAsset(m_OriginalOwner.asset);
+        }
+
+        public void ApplyExternalChangesToProxy()
+        {
+            using (new RebuildGuard(this))
+            {
+                if (m_OriginalOwner.curves == null)
+                    return;
+
+                var curveInfo = AnimationClipCurveCache.Instance.GetCurveInfo(m_OriginalOwner.curves);
+                for (int i = 0; i < curveInfo.bindings.Length; i++)
+                {
+                    if (curveInfo.curves[i] != null && curveInfo.curves.Length != 0)
+                    {
+                        if (m_PropertiesMap.TryGetValue(curveInfo.bindings[i], out var prop) && AnimatedParameterUtility.IsParameterAnimatable(prop))
+                            AnimationUtility.SetEditorCurve(m_ProxyCurves, curveInfo.bindings[i], curveInfo.curves[i]);
+                    }
+                }
+            }
+        }
+
+        void UpdateCurve(EditorCurveBinding binding, AnimationCurve curve)
+        {
+            ApplyConstraints(binding, curve);
+
+            if (curve.length == 0)
+            {
+                HandleAllKeysDeleted(binding);
+                return;
+            }
+
+            // there is no curve in the animation clip, this is a proxy curve
+            if (IsConstantCurve(binding, curve))
+                HandleConstantCurveValueChanged(binding, curve);
+            else
+                HandleCurveUpdated(binding, curve);
+        }
+
+        bool IsConstantCurve(EditorCurveBinding binding, AnimationCurve curve)
+        {
+            if (curve.length != 1)
+                return false;
+            return m_OriginalOwner.curves == null || AnimationUtility.GetEditorCurve(m_OriginalOwner.curves, binding) == null;
+        }
+
+        void ApplyConstraints(EditorCurveBinding binding, AnimationCurve curve)
+        {
+            if (curve.length == 0)
+                return;
+
+            var curveUpdated = false;
+
+            var property = m_PropertiesMap[binding];
+            if (property.propertyType == SerializedPropertyType.Boolean)
+            {
+                TimelineAnimationUtilities.ConstrainCurveToBooleanValues(curve);
+                curveUpdated = true;
+            }
+            else
+            {
+                var range = AnimatedParameterUtility.GetAttributeForProperty<RangeAttribute>(property);
+                if (range != null)
+                {
+                    TimelineAnimationUtilities.ConstrainCurveToRange(curve, range.min, range.max);
+                    curveUpdated = true;
+                }
+            }
+
+            if (!curveUpdated)
+                return;
+
+            using (new RebuildGuard(this))
+            {
+                AnimationUtility.SetEditorCurve(m_ProxyCurves, binding, curve);
+            }
+        }
+
+        void HandleCurveUpdated(EditorCurveBinding binding, AnimationCurve updatedCurve)
+        {
+            if (!m_OriginalOwner.hasCurves)
+                CreateCurves(String.Empty);
+
+            AnimationUtility.SetEditorCurve(m_OriginalOwner.curves, binding, updatedCurve);
+            AnimationUtility.SetEditorCurve(m_ProxyCurves, binding, updatedCurve);
+        }
+
+        void HandleConstantCurveValueChanged(EditorCurveBinding binding, AnimationCurve updatedCurve)
+        {
+            var prop = m_PropertiesMap[binding];
+            if (prop == null)
+                return;
+
+            Undo.RegisterCompleteObjectUndo(prop.serializedObject.targetObject, L10n.Tr("Edit Clip Curve"));
+            prop.serializedObject.UpdateIfRequiredOrScript();
+            CurveEditUtility.SetFromKeyValue(prop, updatedCurve.keys[0].value);
+            prop.serializedObject.ApplyModifiedProperties();
+
+            AnimationUtility.SetEditorCurve(m_ProxyCurves, binding, updatedCurve);
+        }
+
+        void HandleAllKeysDeleted(EditorCurveBinding binding)
+        {
+            if (m_OriginalOwner.hasCurves)
+            {
+                // Remove curve from original asset
+                AnimationUtility.SetEditorCurve(m_OriginalOwner.curves, binding, null);
+                SetProxyCurve(m_PropertiesMap[binding], binding);
+            }
+        }
+
+        void RebuildProxyCurves()
+        {
+            if (!m_IsAnimatable)
+                return;
+
+            using (new RebuildGuard(this))
+            {
+                if (m_ProxyCurves == null)
+                {
+                    m_ProxyCurves = new AnimationClip
+                    {
+                        legacy = true,
+                        name = "Constant Curves",
+                        hideFlags = HideFlags.HideAndDontSave,
+                        frameRate = m_OriginalOwner.targetTrack.timelineAsset == null
+                            ? (float)TimelineAsset.EditorSettings.kDefaultFrameRate
+                            : (float)m_OriginalOwner.targetTrack.timelineAsset.editorSettings.frameRate
+                    };
+                }
+                else
+                {
+                    m_ProxyCurves.ClearCurves();
+                }
+
+                m_OriginalOwner.SanitizeCurvesData();
+                AnimatedParameterUtility.UpdateSerializedPlayableAsset(m_OriginalOwner.asset);
+                var parameters = m_OriginalOwner.GetAllAnimatableParameters().ToArray();
+                foreach (var param in parameters)
+                    CreateProxyCurve(param, m_ProxyCurves, m_OriginalOwner.asset, param.propertyPath);
+
+                AnimationClipCurveCache.Instance.GetCurveInfo(m_ProxyCurves).dirty = true;
+            }
+        }
+
+        // updates the just the proxied values. This can be called when the asset changes, so the proxy values are properly updated
+        public void UpdateProxyCurves()
+        {
+            if (!m_IsAnimatable || m_ProxyCurves == null || m_ProxyCurves.empty)
+                return;
+
+            AnimatedParameterUtility.UpdateSerializedPlayableAsset(m_OriginalOwner.asset);
+            var parameters = m_OriginalOwner.GetAllAnimatableParameters().ToArray();
+            using (new RebuildGuard(this))
+            {
+                if (m_OriginalOwner.hasCurves)
+                {
+                    var bindingInfo = AnimationClipCurveCache.Instance.GetCurveInfo(m_OriginalOwner.curves);
+                    foreach (var param in parameters)
+                    {
+                        var binding = AnimatedParameterUtility.GetCurveBinding(m_OriginalOwner.asset, param.propertyPath);
+                        if (!bindingInfo.bindings.Contains(binding, AnimationPreviewUtilities.EditorCurveBindingComparer.Instance))
+                            SetProxyCurve(param, AnimatedParameterUtility.GetCurveBinding(m_OriginalOwner.asset, param.propertyPath));
+                    }
+                }
+                else
+                {
+                    foreach (var param in parameters)
+                        SetProxyCurve(param, AnimatedParameterUtility.GetCurveBinding(m_OriginalOwner.asset, param.propertyPath));
+                }
+            }
+
+            AnimationClipCurveCache.Instance.GetCurveInfo(m_ProxyCurves).dirty = true;
+        }
+
+        void CreateProxyCurve(SerializedProperty prop, AnimationClip clip, UnityObject owner, string propertyName)
+        {
+            var binding = AnimatedParameterUtility.GetCurveBinding(owner, propertyName);
+
+            var originalCurve = m_OriginalOwner.hasCurves
+                ? AnimationUtility.GetEditorCurve(m_OriginalOwner.curves, binding)
+                : null;
+
+            if (originalCurve != null)
+            {
+                AnimationUtility.SetEditorCurve(clip, binding, originalCurve);
+            }
+            else
+            {
+                SetProxyCurve(prop, binding);
+            }
+
+            m_PropertiesMap[binding] = prop;
+        }
+
+        void SetProxyCurve(SerializedProperty prop, EditorCurveBinding binding)
+        {
+            var curve = new AnimationCurve();
+            CurveEditUtility.AddKeyFrameToCurve(
+                curve, 0.0f, m_ProxyCurves.frameRate, CurveEditUtility.GetKeyValue(prop),
+                prop.propertyType == SerializedPropertyType.Boolean);
+            AnimationUtility.SetEditorCurve(m_ProxyCurves, binding, curve);
+        }
+
+        struct RebuildGuard : IDisposable
+        {
+            CurvesProxy m_Owner;
+            AnimationUtility.OnCurveWasModified m_Callback;
+
+            public RebuildGuard(CurvesProxy owner)
+            {
+                m_Callback = AnimationUtility.onCurveWasModified;
+                AnimationUtility.onCurveWasModified = null;
+                m_Owner = owner;
+                m_Owner.m_ProxyIsRebuilding++;
+            }
+
+            public void Dispose()
+            {
+                AnimationUtility.onCurveWasModified = m_Callback;
+                m_Owner.m_ProxyIsRebuilding--;
+                m_Owner = null;
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/CurvesProxy.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/TimelineAnimationUtilities.cs

@@ -0,0 +1,435 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEditor;
+using UnityEngineInternal;
+using UnityEngine.Timeline;
+using UnityEngine.Playables;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    class TimelineAnimationUtilities
+    {
+        public enum OffsetEditMode
+        {
+            None = -1,
+            Translation = 0,
+            Rotation = 1
+        }
+
+        public static bool ValidateOffsetAvailabitity(PlayableDirector director, Animator animator)
+        {
+            if (director == null || animator == null)
+                return false;
+
+            return true;
+        }
+
+        public static TimelineClip GetPreviousClip(TimelineClip clip)
+        {
+            TimelineClip previousClip = null;
+            foreach (var c in clip.GetParentTrack().clips)
+            {
+                if (c.start < clip.start && (previousClip == null || c.start >= previousClip.start))
+                    previousClip = c;
+            }
+            return previousClip;
+        }
+
+        public static TimelineClip GetNextClip(TimelineClip clip)
+        {
+            return clip.GetParentTrack().clips.Where(c => c.start > clip.start).OrderBy(c => c.start).FirstOrDefault();
+        }
+
+        public struct RigidTransform
+        {
+            public Vector3 position;
+            public Quaternion rotation;
+
+            public static RigidTransform Compose(Vector3 pos, Quaternion rot)
+            {
+                RigidTransform ret;
+                ret.position = pos;
+                ret.rotation = rot;
+                return ret;
+            }
+
+            public static RigidTransform Mul(RigidTransform a, RigidTransform b)
+            {
+                RigidTransform ret;
+                ret.rotation = a.rotation * b.rotation;
+                ret.position = a.position + a.rotation * b.position;
+                return ret;
+            }
+
+            public static RigidTransform Inverse(RigidTransform a)
+            {
+                RigidTransform ret;
+                ret.rotation = Quaternion.Inverse(a.rotation);
+                ret.position = ret.rotation * (-a.position);
+                return ret;
+            }
+
+            public static RigidTransform identity
+            {
+                get { return Compose(Vector3.zero, Quaternion.identity); }
+            }
+        }
+
+
+        private static Matrix4x4 GetTrackMatrix(Transform transform, AnimationTrack track)
+        {
+            Matrix4x4 trackMatrix = Matrix4x4.TRS(track.position, track.rotation, Vector3.one);
+
+            // in scene off mode, the track offsets are set to the preview position which is stored in the track
+            if (track.trackOffset == TrackOffset.ApplySceneOffsets)
+            {
+                trackMatrix = Matrix4x4.TRS(track.sceneOffsetPosition, Quaternion.Euler(track.sceneOffsetRotation), Vector3.one);
+            }
+
+            // put the parent transform on to the track matrix
+            if (transform.parent != null)
+            {
+                trackMatrix = transform.parent.localToWorldMatrix * trackMatrix;
+            }
+
+            return trackMatrix;
+        }
+
+        // Given a world space position and rotation, updates the clip offsets to match that
+        public static RigidTransform UpdateClipOffsets(AnimationPlayableAsset asset, AnimationTrack track, Transform transform, Vector3 globalPosition, Quaternion globalRotation)
+        {
+            Matrix4x4 worldToLocal = transform.worldToLocalMatrix;
+            Matrix4x4 clipMatrix = Matrix4x4.TRS(asset.position, asset.rotation, Vector3.one);
+            Matrix4x4 trackMatrix = GetTrackMatrix(transform, track);
+
+
+            // Use the transform to find the proper goal matrix with scale taken into account
+            var oldPos = transform.position;
+            var oldRot = transform.rotation;
+            transform.position = globalPosition;
+            transform.rotation = globalRotation;
+            Matrix4x4 goal = transform.localToWorldMatrix;
+            transform.position = oldPos;
+            transform.rotation = oldRot;
+
+            // compute the new clip matrix.
+            Matrix4x4 newClip = trackMatrix.inverse * goal * worldToLocal * trackMatrix * clipMatrix;
+            return RigidTransform.Compose(newClip.GetColumn(3), MathUtils.QuaternionFromMatrix(newClip));
+        }
+
+        public static RigidTransform GetTrackOffsets(AnimationTrack track, Transform transform)
+        {
+            Vector3 position = track.position;
+            Quaternion rotation = track.rotation;
+            if (transform != null && transform.parent != null)
+            {
+                position = transform.parent.TransformPoint(position);
+                rotation = transform.parent.rotation * rotation;
+                MathUtils.QuaternionNormalize(ref rotation);
+            }
+
+            return RigidTransform.Compose(position, rotation);
+        }
+
+        public static void UpdateTrackOffset(AnimationTrack track, Transform transform, RigidTransform offsets)
+        {
+            if (transform != null && transform.parent != null)
+            {
+                offsets.position = transform.parent.InverseTransformPoint(offsets.position);
+                offsets.rotation = Quaternion.Inverse(transform.parent.rotation) * offsets.rotation;
+                MathUtils.QuaternionNormalize(ref offsets.rotation);
+            }
+
+            track.position = offsets.position;
+            track.eulerAngles = AnimationUtility.GetClosestEuler(offsets.rotation, track.eulerAngles, RotationOrder.OrderZXY);
+            track.UpdateClipOffsets();
+        }
+
+        static MatchTargetFields GetMatchFields(TimelineClip clip)
+        {
+            var track = clip.GetParentTrack() as AnimationTrack;
+            if (track == null)
+                return MatchTargetFieldConstants.None;
+
+            var asset = clip.asset as AnimationPlayableAsset;
+            var fields = track.matchTargetFields;
+            if (asset != null && !asset.useTrackMatchFields)
+                fields = asset.matchTargetFields;
+            return fields;
+        }
+
+        static void WriteMatchFields(AnimationPlayableAsset asset, RigidTransform result, MatchTargetFields fields)
+        {
+            Vector3 position = asset.position;
+
+            position.x = fields.HasAny(MatchTargetFields.PositionX) ? result.position.x : position.x;
+            position.y = fields.HasAny(MatchTargetFields.PositionY) ? result.position.y : position.y;
+            position.z = fields.HasAny(MatchTargetFields.PositionZ) ? result.position.z : position.z;
+
+            asset.position = position;
+
+            // check first to avoid unnecessary conversion errors
+            if (fields.HasAny(MatchTargetFieldConstants.Rotation))
+            {
+                Vector3 eulers = asset.eulerAngles;
+                Vector3 resultEulers = result.rotation.eulerAngles;
+
+                eulers.x = fields.HasAny(MatchTargetFields.RotationX) ? resultEulers.x : eulers.x;
+                eulers.y = fields.HasAny(MatchTargetFields.RotationY) ? resultEulers.y : eulers.y;
+                eulers.z = fields.HasAny(MatchTargetFields.RotationZ) ? resultEulers.z : eulers.z;
+
+                asset.eulerAngles = AnimationUtility.GetClosestEuler(Quaternion.Euler(eulers), asset.eulerAngles, RotationOrder.OrderZXY);
+            }
+        }
+
+        public static void MatchPrevious(TimelineClip currentClip, Transform matchPoint, PlayableDirector director)
+        {
+            const double timeEpsilon = 0.00001;
+            MatchTargetFields matchFields = GetMatchFields(currentClip);
+            if (matchFields == MatchTargetFieldConstants.None || matchPoint == null)
+                return;
+
+            double cachedTime = director.time;
+
+            // finds previous clip
+            TimelineClip previousClip = GetPreviousClip(currentClip);
+            if (previousClip == null || currentClip == previousClip)
+                return;
+
+            // make sure the transform is properly updated before modifying the graph
+            director.Evaluate();
+
+            var parentTrack = currentClip.GetParentTrack() as AnimationTrack;
+
+            var blendIn = currentClip.blendInDuration;
+            currentClip.blendInDuration = 0;
+            var blendOut = previousClip.blendOutDuration;
+            previousClip.blendOutDuration = 0;
+
+            //evaluate previous without current
+            parentTrack.RemoveClip(currentClip);
+            director.RebuildGraph();
+            double previousEndTime = currentClip.start > previousClip.end ? previousClip.end : currentClip.start;
+            director.time = previousEndTime - timeEpsilon;
+            director.Evaluate(); // add port to evaluate only track
+
+            var targetPosition = matchPoint.position;
+            var targetRotation = matchPoint.rotation;
+
+            // evaluate current without previous
+            parentTrack.AddClip(currentClip);
+            parentTrack.RemoveClip(previousClip);
+            director.RebuildGraph();
+            director.time = currentClip.start + timeEpsilon;
+            director.Evaluate();
+
+            //////////////////////////////////////////////////////////////////////
+            //compute offsets
+
+            var animationPlayable = currentClip.asset as AnimationPlayableAsset;
+            var match = UpdateClipOffsets(animationPlayable, parentTrack, matchPoint, targetPosition, targetRotation);
+            WriteMatchFields(animationPlayable, match, matchFields);
+
+            //////////////////////////////////////////////////////////////////////
+
+            currentClip.blendInDuration = blendIn;
+            previousClip.blendOutDuration = blendOut;
+
+            parentTrack.AddClip(previousClip);
+            director.RebuildGraph();
+            director.time = cachedTime;
+            director.Evaluate();
+        }
+
+        public static void MatchNext(TimelineClip currentClip, Transform matchPoint, PlayableDirector director)
+        {
+            const double timeEpsilon = 0.00001;
+            MatchTargetFields matchFields = GetMatchFields(currentClip);
+            if (matchFields == MatchTargetFieldConstants.None || matchPoint == null)
+                return;
+
+            double cachedTime = director.time;
+
+            // finds next clip
+            TimelineClip nextClip = GetNextClip(currentClip);
+            if (nextClip == null || currentClip == nextClip)
+                return;
+
+            // make sure the transform is properly updated before modifying the graph
+            director.Evaluate();
+
+            var parentTrack = currentClip.GetParentTrack() as AnimationTrack;
+
+            var blendOut = currentClip.blendOutDuration;
+            var blendIn = nextClip.blendInDuration;
+            currentClip.blendOutDuration = 0;
+            nextClip.blendInDuration = 0;
+
+            //evaluate previous without current
+            parentTrack.RemoveClip(currentClip);
+            director.RebuildGraph();
+            director.time = nextClip.start + timeEpsilon;
+            director.Evaluate(); // add port to evaluate only track
+
+            var targetPosition = matchPoint.position;
+            var targetRotation = matchPoint.rotation;
+
+            // evaluate current without next
+            parentTrack.AddClip(currentClip);
+            parentTrack.RemoveClip(nextClip);
+            director.RebuildGraph();
+            director.time = Math.Min(nextClip.start, currentClip.end - timeEpsilon);
+            director.Evaluate();
+
+            //////////////////////////////////////////////////////////////////////
+            //compute offsets
+
+            var animationPlayable = currentClip.asset as AnimationPlayableAsset;
+            var match = UpdateClipOffsets(animationPlayable, parentTrack, matchPoint, targetPosition, targetRotation);
+            WriteMatchFields(animationPlayable, match, matchFields);
+
+            //////////////////////////////////////////////////////////////////////
+
+            currentClip.blendOutDuration = blendOut;
+            nextClip.blendInDuration = blendIn;
+
+            parentTrack.AddClip(nextClip);
+            director.RebuildGraph();
+            director.time = cachedTime;
+            director.Evaluate();
+        }
+
+        public static TimelineWindowTimeControl CreateTimeController(TimelineClip clip)
+        {
+            var animationWindow = EditorWindow.GetWindow<AnimationWindow>();
+            var timeController = ScriptableObject.CreateInstance<TimelineWindowTimeControl>();
+            timeController.Init(animationWindow.state, clip);
+            return timeController;
+        }
+
+        public static TimelineWindowTimeControl CreateTimeController(TimelineWindowTimeControl.ClipData clipData)
+        {
+            var animationWindow = EditorWindow.GetWindow<AnimationWindow>();
+            var timeController = ScriptableObject.CreateInstance<TimelineWindowTimeControl>();
+            timeController.Init(animationWindow.state, clipData);
+            return timeController;
+        }
+
+        public static void EditAnimationClipWithTimeController(AnimationClip animationClip, TimelineWindowTimeControl timeController, Object sourceObject)
+        {
+            var animationWindow = EditorWindow.GetWindow<AnimationWindow>();
+            animationWindow.EditSequencerClip(animationClip, sourceObject, timeController);
+        }
+
+        public static void UnlinkAnimationWindowFromTracks(IEnumerable<TrackAsset> tracks)
+        {
+            var clips = new List<AnimationClip>();
+            foreach (var track in tracks)
+            {
+                var animationTrack = track as AnimationTrack;
+                if (animationTrack != null && animationTrack.infiniteClip != null)
+                    clips.Add(animationTrack.infiniteClip);
+
+                GetAnimationClips(track.GetClips(), clips);
+            }
+            UnlinkAnimationWindowFromAnimationClips(clips);
+        }
+
+        public static void UnlinkAnimationWindowFromClips(IEnumerable<TimelineClip> timelineClips)
+        {
+            var clips = new List<AnimationClip>();
+            GetAnimationClips(timelineClips, clips);
+            UnlinkAnimationWindowFromAnimationClips(clips);
+        }
+
+        public static void UnlinkAnimationWindowFromAnimationClips(ICollection<AnimationClip> clips)
+        {
+            if (clips.Count == 0)
+                return;
+
+            UnityEngine.Object[] windows = Resources.FindObjectsOfTypeAll(typeof(AnimationWindow));
+            foreach (var animWindow in windows.OfType<AnimationWindow>())
+            {
+                if (animWindow != null && animWindow.state != null && animWindow.state.linkedWithSequencer && clips.Contains(animWindow.state.activeAnimationClip))
+                    animWindow.UnlinkSequencer();
+            }
+        }
+
+        public static void UnlinkAnimationWindow()
+        {
+            UnityEngine.Object[] windows = Resources.FindObjectsOfTypeAll(typeof(AnimationWindow));
+            foreach (var animWindow in windows.OfType<AnimationWindow>())
+            {
+                if (animWindow != null && animWindow.state != null && animWindow.state.linkedWithSequencer)
+                    animWindow.UnlinkSequencer();
+            }
+        }
+
+        private static void GetAnimationClips(IEnumerable<TimelineClip> timelineClips, List<AnimationClip> clips)
+        {
+            foreach (var timelineClip in timelineClips)
+            {
+                if (timelineClip.curves != null)
+                    clips.Add(timelineClip.curves);
+                AnimationPlayableAsset apa = timelineClip.asset as AnimationPlayableAsset;
+                if (apa != null && apa.clip != null)
+                    clips.Add(apa.clip);
+            }
+        }
+
+        public static int GetAnimationWindowCurrentFrame()
+        {
+            var animationWindow = EditorWindow.GetWindow<AnimationWindow>();
+            if (animationWindow)
+                return animationWindow.state.currentFrame;
+            return -1;
+        }
+
+        public static void SetAnimationWindowCurrentFrame(int frame)
+        {
+            var animationWindow = EditorWindow.GetWindow<AnimationWindow>();
+            if (animationWindow)
+                animationWindow.state.currentFrame = frame;
+        }
+
+        public static void ConstrainCurveToBooleanValues(AnimationCurve curve)
+        {
+            // Clamp the values first
+            var keys = curve.keys;
+            for (var i = 0; i < keys.Length; i++)
+            {
+                var key = keys[i];
+                key.value = key.value < 0.5f ? 0.0f : 1.0f;
+                keys[i] = key;
+            }
+            curve.keys = keys;
+
+            // Update the tangents once all the values are clamped
+            for (var i = 0; i < curve.length; i++)
+            {
+                AnimationUtility.SetKeyLeftTangentMode(curve, i, AnimationUtility.TangentMode.Constant);
+                AnimationUtility.SetKeyRightTangentMode(curve, i, AnimationUtility.TangentMode.Constant);
+            }
+        }
+
+        public static void ConstrainCurveToRange(AnimationCurve curve, float minValue, float maxValue)
+        {
+            var keys = curve.keys;
+            for (var i = 0; i < keys.Length; i++)
+            {
+                var key = keys[i];
+                key.value = Mathf.Clamp(key.value, minValue, maxValue);
+                keys[i] = key;
+            }
+            curve.keys = keys;
+        }
+
+        public static bool IsAnimationClip(TimelineClip clip)
+        {
+            return clip != null && (clip.asset as AnimationPlayableAsset) != null;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Animation/TimelineAnimationUtilities.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/ActiveInModeAttribute.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Define the activeness of an action depending on its timeline mode.
+    /// </summary>
+    /// <seealso cref="TimelineModes"/>
+    [AttributeUsage(AttributeTargets.Class)]
+    public class ActiveInModeAttribute : Attribute
+    {
+        /// <summary>
+        /// Modes that will be used for activeness of an action.
+        /// </summary>
+        public TimelineModes modes { get; }
+
+        /// <summary>
+        /// Defines in which mode the action will be active.
+        /// </summary>
+        /// <param name="timelineModes">Modes that will define activeness of the action.</param>
+        public ActiveInModeAttribute(TimelineModes timelineModes)
+        {
+            modes = timelineModes;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/ActiveInModeAttribute.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/MenuEntryAttribute.cs

@@ -0,0 +1,51 @@
+using System;
+using UnityEngine;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Use this attribute to add a menu item to a context menu.
+    /// Used to indicate path and priority that are auto added to the menu
+    /// (examples can be found on <see href="https://docs.unity3d.com/ScriptReference/MenuItem.html"/>).
+    /// </summary>
+    /// <example>
+    /// <code source="../../DocCodeExamples/TimelineAttributesExamples.cs" region="declare-menuEntryAttribute" title="menuEntryAttr"/>
+    /// </example>
+    /// <remarks>
+    /// Unlike Menu item, MenuEntryAttribute doesn't handle shortcuts in the menu name. See <see cref="TimelineShortcutAttribute"/>.
+    /// </remarks>
+    [AttributeUsage(AttributeTargets.Class)]
+    public class MenuEntryAttribute : Attribute
+    {
+        internal readonly int priority;
+        internal readonly string name;
+        internal readonly string subMenuPath;
+
+        /// <summary>
+        /// Constructor for Menu Entry Attribute to define information about the menu item for an action.
+        /// </summary>
+        /// <param name="path">Path to the menu. If there is a "/" in the path, it will create one (or multiple) submenu items.</param>
+        /// <param name="priority">Priority to decide where the menu will be positioned in the menu.
+        /// The lower the priority, the higher the menu item will be in the context menu.
+        /// </param>
+        /// <seealso cref="MenuPriority"/>
+        public MenuEntryAttribute(string path = default, int priority = MenuPriority.defaultPriority)
+        {
+            path = path ?? string.Empty;
+            path = L10n.Tr(path);
+            this.priority = priority;
+
+            var index = path.LastIndexOf('/');
+            if (index >= 0)
+            {
+                name = (index == path.Length - 1) ? string.Empty : path.Substring(index + 1);
+                subMenuPath = path.Substring(0, index + 1);
+            }
+            else
+            {
+                name = path;
+                subMenuPath = string.Empty;
+            }
+        }
+    }
+}

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/ShortcutAttribute.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Linq;
+using UnityEditor.ShortcutManagement;
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    [AttributeUsage(AttributeTargets.Class, Inherited = false)]
+    class ShortcutAttribute : Attribute
+    {
+        readonly string m_Identifier;
+        readonly string m_EventCommandName;
+        readonly string m_MenuShortcut;
+
+        public ShortcutAttribute(string identifier)
+        {
+            m_Identifier = identifier;
+            m_EventCommandName = identifier;
+        }
+
+        public ShortcutAttribute(string identifier, string commandName)
+        {
+            m_Identifier = identifier;
+            m_EventCommandName = commandName;
+        }
+
+        public ShortcutAttribute(KeyCode key, ShortcutModifiers modifiers = ShortcutModifiers.None)
+        {
+            m_MenuShortcut = new KeyCombination(key, modifiers).ToMenuShortcutString();
+        }
+
+        public string GetMenuShortcut()
+        {
+            if (m_MenuShortcut != null)
+                return m_MenuShortcut;
+
+            //find the mapped shortcut in the shortcut manager
+            var shortcut = ShortcutIntegration.instance.directory.FindShortcutEntry(m_Identifier);
+            if (shortcut != null && shortcut.combinations.Any())
+            {
+                return KeyCombination.SequenceToMenuString(shortcut.combinations);
+            }
+
+            return string.Empty;
+        }
+
+        public bool MatchesEvent(Event evt)
+        {
+            if (evt.type != EventType.ExecuteCommand)
+                return false;
+            return evt.commandName == m_EventCommandName;
+        }
+    }
+
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = false)]
+    class ShortcutPlatformOverrideAttribute : ShortcutAttribute
+    {
+        RuntimePlatform platform { get; }
+
+        public ShortcutPlatformOverrideAttribute(RuntimePlatform platform, KeyCode key, ShortcutModifiers modifiers = ShortcutModifiers.None)
+            : base(key, modifiers)
+        {
+            this.platform = platform;
+        }
+
+        public bool MatchesCurrentPlatform()
+        {
+            return Application.platform == platform;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/ShortcutAttribute.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/TimelineShortcutAttribute.cs

@@ -0,0 +1,24 @@
+using UnityEditor.ShortcutManagement;
+using UnityEngine;
+
+namespace UnityEditor.Timeline.Actions
+{
+    /// <summary>
+    /// Use this attribute to make an action work with the shortcut system.
+    /// </summary>
+    /// <example>
+    /// TimelineShortcutAttribute needs to be added to a static method.
+    /// <code source="../../DocCodeExamples/TimelineAttributesExamples.cs" region="declare-timelineShortcutAttr" title="TimelineShortcutAttr"/>
+    /// </example>
+    public class TimelineShortcutAttribute : ShortcutManagement.ShortcutAttribute
+    {
+        /// <summary>
+        /// TimelineShortcutAttribute Constructor
+        /// </summary>
+        /// <param name="id">Id to register the shortcut. It will automatically be prefix by 'Timeline/' in order to be in the 'Timeline' section of the shortcut manager.</param>
+        /// <param name="defaultKeyCode">Optional key code for default binding.</param>
+        /// <param name="defaultShortcutModifiers">Optional shortcut modifiers for default binding.</param>
+        public TimelineShortcutAttribute(string id, KeyCode defaultKeyCode, ShortcutModifiers defaultShortcutModifiers = ShortcutModifiers.None)
+            : base("Timeline/" + id, typeof(TimelineWindow), defaultKeyCode, defaultShortcutModifiers) { }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Attributes/TimelineShortcutAttribute.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioClipPropertiesDrawer.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using JetBrains.Annotations;
+using UnityEditor;
+using UnityEditor.Timeline;
+#if !UNITY_2020_2_OR_NEWER
+using L10n = UnityEditor.Timeline.L10n;
+#endif
+
+namespace UnityEngine.Timeline
+{
+    [CustomPropertyDrawer(typeof(AudioClipProperties))]
+    class AudioClipPropertiesDrawer : PropertyDrawer
+    {
+        [UsedImplicitly] // Also used by tests
+        internal static class Styles
+        {
+            public const string VolumeControl = "AudioClipPropertiesDrawer.volume";
+
+            const string k_Indent = "    ";
+            public const string valuesFormatter = "0.###";
+            public static string mixedPropertiesInfo = L10n.Tr("The final {3} is {0}\n") +
+                L10n.Tr("Calculated from:\n") +
+                k_Indent + L10n.Tr("Clip: {1}\n") +
+                k_Indent + L10n.Tr("Track: {2}");
+
+            public static string audioSourceContribution = k_Indent + L10n.Tr("AudioSource: {0}");
+        }
+
+        static StringBuilder s_MixInfoBuilder = new StringBuilder();
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            var volumeProp = property.FindPropertyRelative("volume");
+
+            GUI.SetNextControlName(Styles.VolumeControl);
+            EditorGUI.Slider(position, volumeProp, 0.0f, 1.0f, AudioSourceInspector.Styles.volumeLabel);
+
+            if (TimelineEditor.inspectedDirector == null)
+                // Nothing more to do in asset mode
+                return;
+
+            var clip = SelectionManager.SelectedClips().FirstOrDefault(c => c.asset == property.serializedObject.targetObject);
+
+            if (clip == null || clip.GetParentTrack() == null)
+                return;
+
+            var clipVolume = volumeProp.floatValue;
+            var trackVolume = new SerializedObject(clip.GetParentTrack()).FindProperty("m_TrackProperties.volume").floatValue;
+            var binding = TimelineEditor.inspectedDirector.GetGenericBinding(clip.GetParentTrack()) as AudioSource;
+
+            if (Math.Abs(clipVolume) < float.Epsilon &&
+                Math.Abs(trackVolume) < float.Epsilon &&
+                (binding == null || Math.Abs(binding.volume) < float.Epsilon))
+                return;
+
+            if (Math.Abs(clipVolume - 1) < float.Epsilon &&
+                Math.Abs(trackVolume - 1) < float.Epsilon &&
+                (binding == null || Math.Abs(binding.volume - 1) < float.Epsilon))
+                return;
+
+            s_MixInfoBuilder.Length = 0;
+
+            var audioSourceVolume = binding == null ? 1.0f : binding.volume;
+
+            s_MixInfoBuilder.AppendFormat(
+                Styles.mixedPropertiesInfo,
+                (clipVolume * trackVolume * audioSourceVolume).ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                clipVolume.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                trackVolume.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                AudioSourceInspector.Styles.volumeLabel.text);
+
+            if (binding != null)
+                s_MixInfoBuilder.Append("\n")
+                    .AppendFormat(Styles.audioSourceContribution,
+                        audioSourceVolume.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture));
+
+            EditorGUILayout.Space();
+            EditorGUILayout.HelpBox(new GUIContent(s_MixInfoBuilder.ToString()));
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioClipPropertiesDrawer.cs.meta

@@ -0,0 +1,11 @@
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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioPlayableAssetEditor.cs

@@ -0,0 +1,104 @@
+using System.Collections.Generic;
+using JetBrains.Annotations;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    [CustomTimelineEditor(typeof(AudioPlayableAsset)), UsedImplicitly]
+    class AudioPlayableAssetEditor : ClipEditor
+    {
+        readonly string k_NoClipAssignedError = L10n.Tr("No audio clip assigned");
+        readonly Dictionary<TimelineClip, WaveformPreview> m_PersistentPreviews = new Dictionary<TimelineClip, WaveformPreview>();
+        ColorSpace m_ColorSpace = ColorSpace.Uninitialized;
+
+        public override ClipDrawOptions GetClipOptions(TimelineClip clip)
+        {
+            var clipOptions = base.GetClipOptions(clip);
+            var audioAsset = clip.asset as AudioPlayableAsset;
+            if (audioAsset != null && audioAsset.clip == null)
+                clipOptions.errorText = k_NoClipAssignedError;
+            return clipOptions;
+        }
+
+        public override void DrawBackground(TimelineClip clip, ClipBackgroundRegion region)
+        {
+            if (!TimelineWindow.instance.state.showAudioWaveform)
+                return;
+
+            var rect = region.position;
+            if (rect.width <= 0)
+                return;
+
+            var audioClip = clip.asset as AudioClip;
+            if (audioClip == null)
+            {
+                var audioPlayableAsset = clip.asset as AudioPlayableAsset;
+                if (audioPlayableAsset != null)
+                    audioClip = audioPlayableAsset.clip;
+            }
+
+            if (audioClip == null)
+                return;
+
+            var quantizedRect = new Rect(Mathf.Ceil(rect.x), Mathf.Ceil(rect.y), Mathf.Ceil(rect.width), Mathf.Ceil(rect.height));
+
+            WaveformPreview preview = GetOrCreateWaveformPreview(clip, audioClip, quantizedRect, region.startTime, region.endTime);
+            if (Event.current.type == EventType.Repaint)
+                DrawWaveformPreview(preview, quantizedRect);
+        }
+
+        public WaveformPreview GetOrCreateWaveformPreview(TimelineClip clip, AudioClip audioClip, Rect rect, double startTime, double endTime)
+        {
+            if (QualitySettings.activeColorSpace != m_ColorSpace)
+            {
+                m_ColorSpace = QualitySettings.activeColorSpace;
+                m_PersistentPreviews.Clear();
+            }
+
+            bool previewExists = m_PersistentPreviews.TryGetValue(clip, out WaveformPreview preview);
+            bool audioClipHasChanged = preview != null && audioClip != preview.presentedObject;
+            if (!previewExists || audioClipHasChanged)
+            {
+                if (AssetDatabase.Contains(audioClip))
+                    preview = CreateWaveformPreview(audioClip, rect);
+                m_PersistentPreviews[clip] = preview;
+            }
+
+            if (preview == null)
+                return null;
+
+            preview.looping = clip.SupportsLooping();
+            preview.SetTimeInfo(startTime, endTime - startTime);
+            preview.OptimizeForSize(rect.size);
+            return preview;
+        }
+
+        public static void DrawWaveformPreview(WaveformPreview preview, Rect rect)
+        {
+            if (preview != null)
+            {
+                preview.ApplyModifications();
+                preview.Render(rect);
+            }
+        }
+
+        static WaveformPreview CreateWaveformPreview(AudioClip audioClip, Rect quantizedRect)
+        {
+            WaveformPreview preview = WaveformPreviewFactory.Create((int)quantizedRect.width, audioClip);
+            Color waveColour = GammaCorrect(DirectorStyles.Instance.customSkin.colorAudioWaveform);
+            Color transparent = waveColour;
+            transparent.a = 0;
+            preview.backgroundColor = transparent;
+            preview.waveColor = waveColour;
+            preview.SetChannelMode(WaveformPreview.ChannelMode.MonoSum);
+            preview.updated += () => TimelineEditor.Refresh(RefreshReason.WindowNeedsRedraw);
+            return preview;
+        }
+
+        static Color GammaCorrect(Color color)
+        {
+            return (QualitySettings.activeColorSpace == ColorSpace.Linear) ? color.gamma : color;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioPlayableAssetEditor.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioPlayableAssetInspector.cs

@@ -0,0 +1,27 @@
+using UnityEditor;
+using UnityEditor.Timeline;
+using UnityEngine.Playables;
+
+namespace UnityEngine.Timeline
+{
+    [CustomEditor(typeof(AudioPlayableAsset))]
+    class AudioPlayableAssetInspector : BasicAssetInspector
+    {
+        public override void OnPlayableAssetChangedInInspector()
+        {
+            // At this point, we are guaranteed that the Timeline window is focused on
+            // the correct asset and that a single clip is selected (see ClipInspector)
+
+            if (TimelineEditor.inspectedDirector == null)
+                // Do nothing if in asset mode
+                return;
+
+            var asset = (AudioPlayableAsset)target;
+
+            if (TimelineEditor.inspectedDirector.state == PlayState.Playing)
+                asset.LiveLink();
+            else
+                TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioPlayableAssetInspector.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioTrackInspector.cs

@@ -0,0 +1,167 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using JetBrains.Annotations;
+using UnityEditor;
+using UnityEditor.Timeline;
+using UnityEngine.Playables;
+#if !UNITY_2020_2_OR_NEWER
+using L10n = UnityEditor.Timeline.L10n;
+#endif
+
+namespace UnityEngine.Timeline
+{
+    [CustomEditor(typeof(AudioTrack))]
+    [CanEditMultipleObjects]
+    class AudioTrackInspector : TrackAssetInspector
+    {
+        [UsedImplicitly] // Also used by tests
+        internal static class Styles
+        {
+            public const string VolumeControl = "AudioTrackInspector.volume";
+            public const string StereoPanControl = "AudioTrackInspector.stereoPan";
+            public const string SpatialBlendControl = "AudioTrackInspector.spatialBlend";
+
+            const string k_Indent = "    ";
+            public const string valuesFormatter = "0.###";
+            public const string mixInfoSectionSeparator = "\n\n";
+            public static string mixedPropertiesInfo = L10n.Tr("The final {3} is {0}\n") +
+                L10n.Tr("Calculated from:\n") +
+                k_Indent + L10n.Tr("Track: {1}\n") +
+                k_Indent + L10n.Tr("AudioSource: {2}");
+        }
+
+        static StringBuilder s_MixInfoBuilder = new StringBuilder();
+
+        SerializedProperty m_VolumeProperty;
+        SerializedProperty m_StereoPanProperty;
+        SerializedProperty m_SpatialBlendProperty;
+        PlayableDirector m_Director;
+
+        public override void OnEnable()
+        {
+            base.OnEnable();
+
+            if (((AudioTrack)target).timelineAsset == TimelineEditor.inspectedAsset)
+                m_Director = TimelineEditor.inspectedDirector;
+
+            m_VolumeProperty = serializedObject.FindProperty("m_TrackProperties.volume");
+            m_StereoPanProperty = serializedObject.FindProperty("m_TrackProperties.stereoPan");
+            m_SpatialBlendProperty = serializedObject.FindProperty("m_TrackProperties.spatialBlend");
+        }
+
+        protected override void DrawTrackProperties()
+        {
+            // Volume
+            GUI.SetNextControlName(Styles.VolumeControl);
+            EditorGUILayout.Slider(m_VolumeProperty, 0.0f, 1.0f, AudioSourceInspector.Styles.volumeLabel);
+            EditorGUILayout.Space();
+
+            // Stereo Pan
+            GUI.SetNextControlName(Styles.StereoPanControl);
+            EditorGUIUtility.sliderLabels.SetLabels(AudioSourceInspector.Styles.panLeftLabel, AudioSourceInspector.Styles.panRightLabel);
+            EditorGUILayout.Slider(m_StereoPanProperty, -1.0f, 1.0f, AudioSourceInspector.Styles.panStereoLabel);
+            EditorGUIUtility.sliderLabels.SetLabels(null, null);
+            EditorGUILayout.Space();
+
+            // Spatial Blend
+            using (new EditorGUI.DisabledScope(ShouldDisableSpatialBlend()))
+            {
+                GUI.SetNextControlName(Styles.SpatialBlendControl);
+                EditorGUIUtility.sliderLabels.SetLabels(AudioSourceInspector.Styles.spatialLeftLabel, AudioSourceInspector.Styles.spatialRightLabel);
+                EditorGUILayout.Slider(m_SpatialBlendProperty, 0.0f, 1.0f, AudioSourceInspector.Styles.spatialBlendLabel);
+                EditorGUIUtility.sliderLabels.SetLabels(null, null);
+            }
+
+            DrawMixInfoSection();
+        }
+
+        void DrawMixInfoSection()
+        {
+            if (m_Director == null || targets.Length > 1)
+                return;
+
+            var binding = m_Director.GetGenericBinding(target) as AudioSource;
+            if (binding == null)
+                return;
+
+            var audioSourceVolume = binding.volume;
+            var audioSourcePan = binding.panStereo;
+            var audioSourceBlend = binding.spatialBlend;
+
+            var trackVolume = m_VolumeProperty.floatValue;
+            var trackPan = m_StereoPanProperty.floatValue;
+            var trackBlend = m_SpatialBlendProperty.floatValue;
+
+            // Skip sections when result is obvious
+
+            var skipVolumeInfo = Math.Abs(audioSourceVolume) < float.Epsilon && Math.Abs(trackVolume) < float.Epsilon ||            // All muted
+                Math.Abs(audioSourceVolume - 1) < float.Epsilon && Math.Abs(trackVolume - 1) < float.Epsilon;                       // All max volume
+
+            var skipPanInfo = Math.Abs(audioSourcePan) < float.Epsilon && Math.Abs(trackPan) < float.Epsilon ||                     // All centered
+                Math.Abs(audioSourcePan - 1) < float.Epsilon && Math.Abs(trackPan - 1) < float.Epsilon ||                           // All right
+                Math.Abs(audioSourcePan - (-1.0f)) < float.Epsilon && Math.Abs(trackPan - (-1.0f)) < float.Epsilon;                 // All left
+
+            var skipBlendInfo = Math.Abs(audioSourceBlend) < float.Epsilon && Math.Abs(trackBlend) < float.Epsilon ||               // All 2D
+                Math.Abs(audioSourceBlend - 1) < float.Epsilon && Math.Abs(trackBlend - 1) < float.Epsilon;                         // All 3D
+
+            if (skipVolumeInfo && skipPanInfo && skipBlendInfo)
+                return;
+
+            s_MixInfoBuilder.Length = 0;
+
+            if (!skipVolumeInfo)
+                s_MixInfoBuilder.AppendFormat(
+                    Styles.mixedPropertiesInfo,
+                    (audioSourceVolume * trackVolume).ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    trackVolume.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    audioSourceVolume.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    AudioSourceInspector.Styles.volumeLabel.text);
+
+            if (!skipVolumeInfo && !skipPanInfo)
+                s_MixInfoBuilder.Append(Styles.mixInfoSectionSeparator);
+
+            if (!skipPanInfo)
+                s_MixInfoBuilder.AppendFormat(
+                    Styles.mixedPropertiesInfo,
+                    Mathf.Clamp(audioSourcePan + trackPan, -1.0f, 1.0f).ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    trackPan.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    audioSourcePan.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    AudioSourceInspector.Styles.panStereoLabel.text);
+
+            if ((!skipVolumeInfo || !skipPanInfo) && !skipBlendInfo)
+                s_MixInfoBuilder.Append(Styles.mixInfoSectionSeparator);
+
+            if (!skipBlendInfo)
+                s_MixInfoBuilder.AppendFormat(
+                    Styles.mixedPropertiesInfo,
+                    Mathf.Clamp01(audioSourceBlend + trackBlend).ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    trackBlend.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    audioSourceBlend.ToString(Styles.valuesFormatter, CultureInfo.InvariantCulture),
+                    AudioSourceInspector.Styles.spatialBlendLabel.text);
+
+            EditorGUILayout.Space();
+            EditorGUILayout.HelpBox(new GUIContent(s_MixInfoBuilder.ToString()));
+        }
+
+        protected override void ApplyChanges()
+        {
+            var track = (AudioTrack)target;
+
+            if (TimelineEditor.inspectedAsset != track.timelineAsset || TimelineEditor.inspectedDirector == null)
+                return;
+
+            if (TimelineEditor.inspectedDirector.state == PlayState.Playing)
+                track.LiveLink();
+            else
+                TimelineEditor.Refresh(RefreshReason.ContentsModified);
+        }
+
+        bool ShouldDisableSpatialBlend()
+        {
+            return m_Director == null ||
+                targets.Any(selectedTrack => m_Director.GetGenericBinding(selectedTrack) == null);
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/Audio/AudioTrackInspector.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/ControlTrack.meta

@@ -0,0 +1,8 @@
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Library/PackageCache/com.unity.timeline@1.7.5/Editor/ControlTrack/ControlPlayableAssetEditor.cs

@@ -0,0 +1,69 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Timeline;
+using UnityEngine.Playables;
+
+namespace UnityEditor.Timeline
+{
+    [CustomTimelineEditor(typeof(ControlPlayableAsset))]
+    class ControlPlayableAssetEditor : ClipEditor
+    {
+        static readonly Texture2D[] s_ParticleSystemIcon = { AssetPreview.GetMiniTypeThumbnail(typeof(ParticleSystem)) };
+
+        public override ClipDrawOptions GetClipOptions(TimelineClip clip)
+        {
+            var asset = (ControlPlayableAsset)clip.asset;
+            var options = base.GetClipOptions(clip);
+            if (asset.updateParticle && TimelineEditor.inspectedDirector != null && asset.controllingParticles)
+                options.icons = s_ParticleSystemIcon;
+            return options;
+        }
+
+        public override void OnCreate(TimelineClip clip, TrackAsset track, TimelineClip clonedFrom)
+        {
+            var asset = (ControlPlayableAsset)clip.asset;
+            GameObject sourceObject = null;
+
+            // go by sourceObject first, then by prefab
+            if (TimelineEditor.inspectedDirector != null)
+                sourceObject = asset.sourceGameObject.Resolve(TimelineEditor.inspectedDirector);
+
+            if (sourceObject == null && asset.prefabGameObject != null)
+                sourceObject = asset.prefabGameObject;
+
+            if (sourceObject)
+            {
+                var directors = asset.GetComponent<PlayableDirector>(sourceObject);
+                var particleSystems = asset.GetComponent<ParticleSystem>(sourceObject);
+
+                // update the duration and loop values (used for UI purposes) here
+                // so they are tied to the latest gameObject bound
+                asset.UpdateDurationAndLoopFlag(directors, particleSystems);
+
+                clip.displayName = sourceObject.name;
+            }
+        }
+
+        public override void GetSubTimelines(TimelineClip clip, PlayableDirector director, List<PlayableDirector> subTimelines)
+        {
+            var asset = (ControlPlayableAsset)clip.asset;
+
+            // If there is a prefab, it will override the source GameObject
+            if (!asset.updateDirector || asset.prefabGameObject != null || director == null)
+                return;
+
+            var go = asset.sourceGameObject.Resolve(director);
+            if (go == null)
+                return;
+
+            foreach (var subTimeline in asset.GetComponent<PlayableDirector>(go))
+            {
+                if (subTimeline == director || subTimeline == TimelineEditor.masterDirector)
+                    continue;
+
+                if (subTimeline.playableAsset is TimelineAsset)
+                    subTimelines.Add(subTimeline);
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/ControlTrack/ControlPlayableAssetEditor.cs.meta

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Library/PackageCache/com.unity.timeline@1.7.5/Editor/CurveEditUtility.cs

@@ -0,0 +1,657 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditorInternal;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    // Utility class for editing animation clips from serialized properties
+    static class CurveEditUtility
+    {
+        public static bool IsRotationKey(EditorCurveBinding binding)
+        {
+            return binding.propertyName.Contains("localEulerAnglesRaw");
+        }
+
+        public static void AddKey(AnimationClip clip, EditorCurveBinding sourceBinding, SerializedProperty prop, double time)
+        {
+            if (sourceBinding.isPPtrCurve)
+            {
+                AddObjectKey(clip, sourceBinding, prop, time);
+            }
+            else if (IsRotationKey(sourceBinding))
+            {
+                AddRotationKey(clip, sourceBinding, prop, time);
+            }
+            else
+            {
+                AddFloatKey(clip, sourceBinding, prop, time);
+            }
+        }
+
+        static void AddObjectKey(AnimationClip clip, EditorCurveBinding sourceBinding, SerializedProperty prop, double time)
+        {
+            if (prop.propertyType != SerializedPropertyType.ObjectReference)
+                return;
+
+            ObjectReferenceKeyframe[] curve = null;
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            var curveIndex = Array.IndexOf(info.objectBindings, sourceBinding);
+            if (curveIndex >= 0)
+            {
+                curve = info.objectCurves[curveIndex];
+
+                // where in the array does the evaluation land?
+                var evalIndex = EvaluateIndex(curve, (float)time);
+
+                if (KeyCompare(curve[evalIndex].time, (float)time, clip.frameRate) == 0)
+                {
+                    curve[evalIndex].value = prop.objectReferenceValue;
+                }
+                // check the next key (always return the minimum value)
+                else if (evalIndex < curve.Length - 1 && KeyCompare(curve[evalIndex + 1].time, (float)time, clip.frameRate) == 0)
+                {
+                    curve[evalIndex + 1].value = prop.objectReferenceValue;
+                }
+                // resize the array
+                else
+                {
+                    if (time > curve[0].time)
+                        evalIndex++;
+                    var key = new ObjectReferenceKeyframe();
+                    key.time = (float)time;
+                    key.value = prop.objectReferenceValue;
+                    ArrayUtility.Insert(ref curve, evalIndex, key);
+                }
+            }
+            else // curve doesn't exist, add it
+            {
+                curve = new ObjectReferenceKeyframe[1];
+                curve[0].time = (float)time;
+                curve[0].value = prop.objectReferenceValue;
+            }
+
+            AnimationUtility.SetObjectReferenceCurve(clip, sourceBinding, curve);
+            EditorUtility.SetDirty(clip);
+        }
+
+        static void AddRotationKey(AnimationClip clip, EditorCurveBinding sourceBind, SerializedProperty prop, double time)
+        {
+            if (prop.propertyType != SerializedPropertyType.Quaternion)
+            {
+                return;
+            }
+
+            var updateCurves = new List<AnimationCurve>();
+            var updateBindings = new List<EditorCurveBinding>();
+
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            for (var i = 0; i < info.bindings.Length; i++)
+            {
+                if (sourceBind.type != info.bindings[i].type)
+                    continue;
+
+                if (info.bindings[i].propertyName.Contains("localEuler"))
+                {
+                    updateBindings.Add(info.bindings[i]);
+                    updateCurves.Add(info.curves[i]);
+                }
+            }
+
+            // use this instead of serialized properties because the editor will attempt to maintain
+            // correct localeulers
+            var eulers = ((Transform)prop.serializedObject.targetObject).localEulerAngles;
+            if (updateBindings.Count == 0)
+            {
+                var propName = AnimationWindowUtility.GetPropertyGroupName(sourceBind.propertyName);
+                updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".x"));
+                updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".y"));
+                updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".z"));
+
+                var curveX = new AnimationCurve();
+                var curveY = new AnimationCurve();
+                var curveZ = new AnimationCurve();
+                AddKeyFrameToCurve(curveX, (float)time, clip.frameRate, eulers.x, false);
+                AddKeyFrameToCurve(curveY, (float)time, clip.frameRate, eulers.y, false);
+                AddKeyFrameToCurve(curveZ, (float)time, clip.frameRate, eulers.z, false);
+
+                updateCurves.Add(curveX);
+                updateCurves.Add(curveY);
+                updateCurves.Add(curveZ);
+            }
+
+            for (var i = 0; i < updateBindings.Count; i++)
+            {
+                var c = updateBindings[i].propertyName.Last();
+                var value = eulers.x;
+                if (c == 'y') value = eulers.y;
+                else if (c == 'z') value = eulers.z;
+                AddKeyFrameToCurve(updateCurves[i], (float)time, clip.frameRate, value, false);
+            }
+
+            UpdateEditorCurves(clip, updateBindings, updateCurves);
+        }
+
+        // Add a floating point curve key
+        static void AddFloatKey(AnimationClip clip, EditorCurveBinding sourceBind, SerializedProperty prop, double time)
+        {
+            var updateCurves = new List<AnimationCurve>();
+            var updateBindings = new List<EditorCurveBinding>();
+
+            var updated = false;
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            for (var i = 0; i < info.bindings.Length; i++)
+            {
+                var binding = info.bindings[i];
+                if (binding.type != sourceBind.type)
+                    continue;
+
+                SerializedProperty valProp = null;
+                var curve = info.curves[i];
+
+                // perfect match on property path, editting a float
+                if (prop.propertyPath.Equals(binding.propertyName))
+                {
+                    valProp = prop;
+                }
+                // this is a child object
+                else if (binding.propertyName.Contains(prop.propertyPath))
+                {
+                    valProp = prop.serializedObject.FindProperty(binding.propertyName);
+                }
+
+                if (valProp != null)
+                {
+                    var value = GetKeyValue(valProp);
+                    if (!float.IsNaN(value)) // Nan indicates an error retrieving the property value
+                    {
+                        updated = true;
+                        AddKeyFrameToCurve(curve, (float)time, clip.frameRate, value, valProp.propertyType == SerializedPropertyType.Boolean);
+                        updateCurves.Add(curve);
+                        updateBindings.Add(binding);
+                    }
+                }
+            }
+
+            // Curves don't exist, add them
+            if (!updated)
+            {
+                var propName = AnimationWindowUtility.GetPropertyGroupName(sourceBind.propertyName);
+                if (!prop.hasChildren)
+                {
+                    var value = GetKeyValue(prop);
+                    if (!float.IsNaN(value))
+                    {
+                        updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, sourceBind.propertyName));
+                        var curve = new AnimationCurve();
+                        AddKeyFrameToCurve(curve, (float)time, clip.frameRate, value, prop.propertyType == SerializedPropertyType.Boolean);
+                        updateCurves.Add(curve);
+                    }
+                }
+                else
+                {
+                    // special case because subproperties on color aren't 'visible' so you can't iterate over them
+                    if (prop.propertyType == SerializedPropertyType.Color)
+                    {
+                        updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".r"));
+                        updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".g"));
+                        updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".b"));
+                        updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, propName + ".a"));
+
+                        var c = prop.colorValue;
+                        for (var i = 0; i < 4; i++)
+                        {
+                            var curve = new AnimationCurve();
+                            AddKeyFrameToCurve(curve, (float)time, clip.frameRate, c[i], prop.propertyType == SerializedPropertyType.Boolean);
+                            updateCurves.Add(curve);
+                        }
+                    }
+                    else
+                    {
+                        prop = prop.Copy();
+                        foreach (SerializedProperty cp in prop)
+                        {
+                            updateBindings.Add(EditorCurveBinding.FloatCurve(sourceBind.path, sourceBind.type, cp.propertyPath));
+                            var curve = new AnimationCurve();
+                            AddKeyFrameToCurve(curve, (float)time, clip.frameRate, GetKeyValue(cp), cp.propertyType == SerializedPropertyType.Boolean);
+                            updateCurves.Add(curve);
+                        }
+                    }
+                }
+            }
+
+            UpdateEditorCurves(clip, updateBindings, updateCurves);
+        }
+
+        public static void RemoveKey(AnimationClip clip, EditorCurveBinding sourceBinding, SerializedProperty prop, double time)
+        {
+            if (sourceBinding.isPPtrCurve)
+            {
+                RemoveObjectKey(clip, sourceBinding, time);
+            }
+            else if (IsRotationKey(sourceBinding))
+            {
+                RemoveRotationKey(clip, sourceBinding, prop, time);
+            }
+            else
+            {
+                RemoveFloatKey(clip, sourceBinding, prop, time);
+            }
+        }
+
+        public static void RemoveObjectKey(AnimationClip clip, EditorCurveBinding sourceBinding, double time)
+        {
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            var curveIndex = Array.IndexOf(info.objectBindings, sourceBinding);
+            if (curveIndex >= 0)
+            {
+                var curve = info.objectCurves[curveIndex];
+                var evalIndex = GetKeyframeAtTime(curve, (float)time, clip.frameRate);
+                if (evalIndex >= 0)
+                {
+                    ArrayUtility.RemoveAt(ref curve, evalIndex);
+                    AnimationUtility.SetObjectReferenceCurve(clip, sourceBinding, curve.Length == 0 ? null : curve);
+                    EditorUtility.SetDirty(clip);
+                }
+            }
+        }
+
+        public static int GetObjectKeyCount(AnimationClip clip, EditorCurveBinding sourceBinding)
+        {
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            var curveIndex = Array.IndexOf(info.objectBindings, sourceBinding);
+            if (curveIndex >= 0)
+            {
+                var curve = info.objectCurves[curveIndex];
+                return curve.Length;
+            }
+
+            return 0;
+        }
+
+        static void RemoveRotationKey(AnimationClip clip, EditorCurveBinding sourceBind, SerializedProperty prop, double time)
+        {
+            if (prop.propertyType != SerializedPropertyType.Quaternion)
+            {
+                return;
+            }
+
+            var updateCurves = new List<AnimationCurve>();
+            var updateBindings = new List<EditorCurveBinding>();
+
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            for (var i = 0; i < info.bindings.Length; i++)
+            {
+                if (sourceBind.type != info.bindings[i].type)
+                    continue;
+
+                if (info.bindings[i].propertyName.Contains("localEuler"))
+                {
+                    updateBindings.Add(info.bindings[i]);
+                    updateCurves.Add(info.curves[i]);
+                }
+            }
+
+            foreach (var c in updateCurves)
+            {
+                RemoveKeyFrameFromCurve(c, (float)time, clip.frameRate);
+            }
+
+            UpdateEditorCurves(clip, updateBindings, updateCurves);
+        }
+
+        // Removes the float keys from curves
+        static void RemoveFloatKey(AnimationClip clip, EditorCurveBinding sourceBind, SerializedProperty prop, double time)
+        {
+            var updateCurves = new List<AnimationCurve>();
+            var updateBindings = new List<EditorCurveBinding>();
+
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            for (var i = 0; i < info.bindings.Length; i++)
+            {
+                var binding = info.bindings[i];
+                if (binding.type != sourceBind.type)
+                    continue;
+
+                SerializedProperty valProp = null;
+                var curve = info.curves[i];
+
+                // perfect match on property path, editting a float
+                if (prop.propertyPath.Equals(binding.propertyName))
+                {
+                    valProp = prop;
+                }
+                // this is a child object
+                else if (binding.propertyName.Contains(prop.propertyPath))
+                {
+                    valProp = prop.serializedObject.FindProperty(binding.propertyName);
+                }
+                if (valProp != null)
+                {
+                    RemoveKeyFrameFromCurve(curve, (float)time, clip.frameRate);
+                    updateCurves.Add(curve);
+                    updateBindings.Add(binding);
+                }
+            }
+
+            // update the curve. Do this last to not mess with the curve caches we are iterating over
+            UpdateEditorCurves(clip, updateBindings, updateCurves);
+        }
+
+        static void UpdateEditorCurve(AnimationClip clip, EditorCurveBinding binding, AnimationCurve curve)
+        {
+            if (curve.keys.Length == 0)
+                AnimationUtility.SetEditorCurve(clip, binding, null);
+            else
+                AnimationUtility.SetEditorCurve(clip, binding, curve);
+        }
+
+        static void UpdateEditorCurves(AnimationClip clip, List<EditorCurveBinding> bindings, List<AnimationCurve> curves)
+        {
+            if (curves.Count == 0)
+                return;
+
+            for (var i = 0; i < curves.Count; i++)
+            {
+                UpdateEditorCurve(clip, bindings[i], curves[i]);
+            }
+            EditorUtility.SetDirty(clip);
+        }
+
+        public static void RemoveCurves(AnimationClip clip, SerializedProperty prop)
+        {
+            if (clip == null || prop == null)
+                return;
+
+            var toRemove = new List<EditorCurveBinding>();
+            var info = AnimationClipCurveCache.Instance.GetCurveInfo(clip);
+            for (var i = 0; i < info.bindings.Length; i++)
+            {
+                var binding = info.bindings[i];
+
+                // check if we match directly, or with a child object
+                if (prop.propertyPath.Equals(binding.propertyName) || binding.propertyName.Contains(prop.propertyPath))
+                {
+                    toRemove.Add(binding);
+                }
+            }
+            for (int i = 0; i < toRemove.Count; i++)
+            {
+                AnimationUtility.SetEditorCurve(clip, toRemove[i], null);
+            }
+        }
+
+        // adds a stepped key frame to the given curve
+        public static void AddKeyFrameToCurve(AnimationCurve curve, float time, float framerate, float value, bool stepped)
+        {
+            var key = new Keyframe();
+
+            bool add = true;
+            var keyIndex = GetKeyframeAtTime(curve, time, framerate);
+            if (keyIndex != -1)
+            {
+                add = false;
+                key = curve[keyIndex]; // retain the tangents and mode
+                curve.RemoveKey(keyIndex);
+            }
+
+            key.value = value;
+            key.time = GetKeyTime(time, framerate);
+            keyIndex = curve.AddKey(key);
+
+            if (stepped)
+            {
+                AnimationUtility.SetKeyBroken(curve, keyIndex, stepped);
+                AnimationUtility.SetKeyLeftTangentMode(curve, keyIndex, AnimationUtility.TangentMode.Constant);
+                AnimationUtility.SetKeyRightTangentMode(curve, keyIndex, AnimationUtility.TangentMode.Constant);
+                key.outTangent = Mathf.Infinity;
+                key.inTangent = Mathf.Infinity;
+            }
+            else if (add)
+            {
+                AnimationUtility.SetKeyLeftTangentMode(curve, keyIndex, AnimationUtility.TangentMode.ClampedAuto);
+                AnimationUtility.SetKeyRightTangentMode(curve, keyIndex, AnimationUtility.TangentMode.ClampedAuto);
+            }
+
+            if (keyIndex != -1 && !stepped)
+            {
+                AnimationUtility.UpdateTangentsFromModeSurrounding(curve, keyIndex);
+                AnimationUtility.SetKeyBroken(curve, keyIndex, false);
+            }
+        }
+
+        // Removes a keyframe at the given time from the animation curve
+        public static bool RemoveKeyFrameFromCurve(AnimationCurve curve, float time, float framerate)
+        {
+            var keyIndex = GetKeyframeAtTime(curve, time, framerate);
+            if (keyIndex == -1)
+                return false;
+
+            curve.RemoveKey(keyIndex);
+            return true;
+        }
+
+        // gets the value of the key
+        public static float GetKeyValue(SerializedProperty prop)
+        {
+            switch (prop.propertyType)
+            {
+                case SerializedPropertyType.Integer:
+                    return prop.intValue;
+                case SerializedPropertyType.Boolean:
+                    return prop.boolValue ? 1.0f : 0.0f;
+                case SerializedPropertyType.Float:
+                    return prop.floatValue;
+                default:
+                    Debug.LogError("Could not convert property type " + prop.propertyType.ToString() + " to float");
+                    break;
+            }
+            return float.NaN;
+        }
+
+        public static void SetFromKeyValue(SerializedProperty prop, float keyValue)
+        {
+            switch (prop.propertyType)
+            {
+                case SerializedPropertyType.Float:
+                {
+                    prop.floatValue = keyValue;
+                    return;
+                }
+                case SerializedPropertyType.Integer:
+                {
+                    prop.intValue = (int)keyValue;
+                    return;
+                }
+                case SerializedPropertyType.Boolean:
+                {
+                    prop.boolValue = Math.Abs(keyValue) > 0.001f;
+                    return;
+                }
+            }
+
+            Debug.LogError("Could not convert float to property type " + prop.propertyType.ToString());
+        }
+
+        // gets the index of the key, -1 if not found
+        public static int GetKeyframeAtTime(AnimationCurve curve, float time, float frameRate)
+        {
+            var range = 0.5f / frameRate;
+            var keys = curve.keys;
+            for (var i = 0; i < keys.Length; i++)
+            {
+                var k = keys[i];
+                if (k.time >= time - range && k.time < time + range)
+                {
+                    return i;
+                }
+            }
+
+            return -1;
+        }
+
+        public static int GetKeyframeAtTime(ObjectReferenceKeyframe[] curve, float time, float frameRate)
+        {
+            if (curve == null || curve.Length == 0)
+                return -1;
+
+            var range = 0.5f / frameRate;
+            for (var i = 0; i < curve.Length; i++)
+            {
+                var t = curve[i].time;
+                if (t >= time - range && t < time + range)
+                {
+                    return i;
+                }
+            }
+            return -1;
+        }
+
+        public static float GetKeyTime(float time, float frameRate)
+        {
+            return Mathf.Round(time * frameRate) / frameRate;
+        }
+
+        public static int KeyCompare(float timeA, float timeB, float frameRate)
+        {
+            if (Mathf.Abs(timeA - timeB) <= 0.5f / frameRate)
+                return 0;
+            return timeA < timeB ? -1 : 1;
+        }
+
+        // Evaluates an object (bool curve)
+        public static Object Evaluate(ObjectReferenceKeyframe[] curve, float time)
+        {
+            return curve[EvaluateIndex(curve, time)].value;
+        }
+
+        // returns the index from evaluation
+        public static int EvaluateIndex(ObjectReferenceKeyframe[] curve, float time)
+        {
+            if (curve == null || curve.Length == 0)
+                throw new InvalidOperationException("Can not evaluate a PPtr curve with no entries");
+
+            // clamp conditions
+            if (time <= curve[0].time)
+                return 0;
+            if (time >= curve.Last().time)
+                return curve.Length - 1;
+
+            // binary search
+            var max = curve.Length - 1;
+            var min = 0;
+            while (max - min > 1)
+            {
+                var imid = (min + max) / 2;
+                if (Mathf.Approximately(curve[imid].time, time))
+                    return imid;
+                if (curve[imid].time < time)
+                    min = imid;
+                else if (curve[imid].time > time)
+                    max = imid;
+            }
+            return min;
+        }
+
+        // Shifts the animation clip so the time start at 0
+        public static void ShiftBySeconds(this AnimationClip clip, float time)
+        {
+            var floatBindings = AnimationUtility.GetCurveBindings(clip);
+            var objectBindings = AnimationUtility.GetObjectReferenceCurveBindings(clip);
+
+            // update the float curves
+            foreach (var bind in floatBindings)
+            {
+                var curve = AnimationUtility.GetEditorCurve(clip, bind);
+                var keys = curve.keys;
+                for (var i = 0; i < keys.Length; i++)
+                    keys[i].time += time;
+                curve.keys = keys;
+                AnimationUtility.SetEditorCurve(clip, bind, curve);
+            }
+
+            // update the PPtr curves
+            foreach (var bind in objectBindings)
+            {
+                var curve = AnimationUtility.GetObjectReferenceCurve(clip, bind);
+                for (var i = 0; i < curve.Length; i++)
+                    curve[i].time += time;
+                AnimationUtility.SetObjectReferenceCurve(clip, bind, curve);
+            }
+
+            EditorUtility.SetDirty(clip);
+        }
+
+        public static void ScaleTime(this AnimationClip clip, float scale)
+        {
+            var floatBindings = AnimationUtility.GetCurveBindings(clip);
+            var objectBindings = AnimationUtility.GetObjectReferenceCurveBindings(clip);
+
+            // update the float curves
+            foreach (var bind in floatBindings)
+            {
+                var curve = AnimationUtility.GetEditorCurve(clip, bind);
+                var keys = curve.keys;
+                for (var i = 0; i < keys.Length; i++)
+                    keys[i].time *= scale;
+                curve.keys = keys.OrderBy(x => x.time).ToArray();
+                AnimationUtility.SetEditorCurve(clip, bind, curve);
+            }
+
+            // update the PPtr curves
+            foreach (var bind in objectBindings)
+            {
+                var curve = AnimationUtility.GetObjectReferenceCurve(clip, bind);
+                for (var i = 0; i < curve.Length; i++)
+                    curve[i].time *= scale;
+                curve = curve.OrderBy(x => x.time).ToArray();
+                AnimationUtility.SetObjectReferenceCurve(clip, bind, curve);
+            }
+
+            EditorUtility.SetDirty(clip);
+        }
+
+        // Creates an opposing blend curve that matches the given curve to make sure the result is normalized
+        public static AnimationCurve CreateMatchingCurve(AnimationCurve curve)
+        {
+            Keyframe[] keys = curve.keys;
+
+            for (var i = 0; i != keys.Length; i++)
+            {
+                if (!Single.IsPositiveInfinity(keys[i].inTangent))
+                    keys[i].inTangent = -keys[i].inTangent;
+                if (!Single.IsPositiveInfinity(keys[i].outTangent))
+                    keys[i].outTangent = -keys[i].outTangent;
+                keys[i].value = 1.0f - keys[i].value;
+            }
+            return new AnimationCurve(keys);
+        }
+
+        // Sanitizes the keys on an animation to force the property to be normalized
+        public static Keyframe[] SanitizeCurveKeys(Keyframe[] keys, bool easeIn)
+        {
+            if (keys.Length < 2)
+            {
+                if (easeIn)
+                    keys = new[] { new Keyframe(0, 0), new Keyframe(1, 1) };
+                else
+                    keys = new[] { new Keyframe(0, 1), new Keyframe(1, 0) };
+            }
+            else if (easeIn)
+            {
+                keys[0].time = 0;
+                keys[keys.Length - 1].time = 1;
+                keys[keys.Length - 1].value = 1;
+            }
+            else
+            {
+                keys[0].time = 0;
+                keys[0].value = 1;
+                keys[keys.Length - 1].time = 1;
+            }
+            return keys;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/CurveEditUtility.cs.meta

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+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/CustomEditors.meta

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+guid: ad70ff8d98b257540b683737743828cb
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Library/PackageCache/com.unity.timeline@1.7.5/Editor/CustomEditors/ClipEditor.cs

@@ -0,0 +1,330 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    /// <summary>
+    /// Description of the on-screen area where a clip is drawn
+    /// </summary>
+    public struct ClipBackgroundRegion
+    {
+        /// <summary>
+        /// The rectangle where the background of the clip is drawn.
+        /// </summary>
+        /// <remarks>
+        /// The rectangle is clipped to the screen. The rectangle does not include clip borders.
+        /// </remarks>
+        public Rect position { get; private set; }
+
+        /// <summary>
+        /// The start time of the region, relative to the clip.
+        /// </summary>
+        public double startTime { get; private set; }
+
+        /// <summary>
+        /// The end time of the region, relative to the clip.
+        /// </summary>
+        public double endTime { get; private set; }
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="_position"></param>
+        /// <param name="_startTime"></param>
+        /// <param name="_endTime"></param>
+        public ClipBackgroundRegion(Rect _position, double _startTime, double _endTime)
+        {
+            position = _position;
+            startTime = _startTime;
+            endTime = _endTime;
+        }
+
+        /// <summary>
+        /// Indicates whether this instance and a specified object are equal.
+        /// </summary>
+        /// <param name="obj">The object to compare with the current instance.</param>
+        /// <returns>Returns <c>true</c> if <paramref name="obj"/> and this instance are the same type and represent the same value.</returns>
+        public override bool Equals(object obj)
+        {
+            if (!(obj is ClipBackgroundRegion))
+                return false;
+
+            return Equals((ClipBackgroundRegion)obj);
+        }
+
+        /// <summary>
+        /// Compares this object with another <c>ClipBackgroundRegion</c>.
+        /// </summary>
+        /// <param name="other">The object to compare with.</param>
+        /// <returns>Returns true if <c>this</c> and <paramref name="other"/> are equal.</returns>
+        public bool Equals(ClipBackgroundRegion other)
+        {
+            return position.Equals(other.position) &&
+                startTime == other.startTime &&
+                endTime == other.endTime;
+        }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>A 32-bit signed integer that is the hash code for this instance.</returns>
+        public override int GetHashCode()
+        {
+            return HashUtility.CombineHash(
+                position.GetHashCode(),
+                startTime.GetHashCode(),
+                endTime.GetHashCode()
+            );
+        }
+
+        /// <summary>
+        /// Compares two <c>ClipBackgroundRegion</c> objects.
+        /// </summary>
+        /// <param name="region1">The first object.</param>
+        /// <param name="region2">The second object.</param>
+        /// <returns>Returns true if they are equal.</returns>
+        public static bool operator ==(ClipBackgroundRegion region1, ClipBackgroundRegion region2)
+        {
+            return region1.Equals(region2);
+        }
+
+        /// <summary>
+        /// Compares two <c>ClipBackgroundRegion</c> objects.
+        /// </summary>
+        /// <param name="region1">The first object.</param>
+        /// <param name="region2">The second object.</param>
+        /// <returns>Returns true if they are not equal.</returns>
+        public static bool operator !=(ClipBackgroundRegion region1, ClipBackgroundRegion region2)
+        {
+            return !region1.Equals(region2);
+        }
+    }
+
+    /// <summary>
+    /// The user-defined options for drawing a clip.
+    /// </summary>
+    public struct ClipDrawOptions
+    {
+        private IEnumerable<Texture2D> m_Icons;
+        private bool m_HideClipName;
+
+        /// <summary>
+        /// Text that indicates if the clip should display an error.
+        /// </summary>
+        /// <remarks>
+        /// If the error text is not empty or null, then the clip displays a warning. The error text is used as the tooltip.
+        /// </remarks>
+        public string errorText { get; set; }
+
+        /// <summary>
+        /// Controls the display of the clip name.
+        /// </summary>
+        /// <remarks>
+        /// Set to true to display the clip name. Set to false to avoid drawing the clip name.
+        /// </remarks>
+        public bool displayClipName
+        {
+            get { return !m_HideClipName; }
+            set { m_HideClipName = !value; }
+        }
+
+        /// <summary>
+        /// Controls the display of the clip scale indicator.
+        /// </summary>
+        /// <remarks>
+        /// Set to true to hide the clip scale indicator.
+        /// This is useful if the scale indicator is interfering with your custom clip rendering, or if the scale indicator
+        /// is not useful for your clip.
+        /// </remarks>
+        public bool hideScaleIndicator { get; set; }
+
+        /// <summary>
+        /// The tooltip to show for the clip.
+        /// </summary>
+        public string tooltip { get; set; }
+
+        /// <summary>
+        /// The color drawn under the clip. By default, the color is the same as the track color.
+        /// </summary>
+        public Color highlightColor { get; set; }
+
+
+        /// <summary>
+        /// Icons to display on the clip.
+        /// </summary>
+        public IEnumerable<Texture2D> icons
+        {
+            get { return m_Icons ?? System.Linq.Enumerable.Empty<Texture2D>(); }
+            set { m_Icons = value; }
+        }
+
+        /// <summary>
+        /// Indicates whether this instance and a specified object are equal.
+        /// </summary>
+        /// <param name="obj">The object to compare with the current instance.</param>
+        /// <returns>Returns <c>true</c> if <paramref name="obj"/> and this instance are the same type and represent the same value.</returns>
+        public override bool Equals(object obj)
+        {
+            if (!(obj is ClipDrawOptions))
+                return false;
+
+            return Equals((ClipDrawOptions)obj);
+        }
+
+        /// <summary>
+        /// Compares this object with another <c>ClipDrawOptions</c>.
+        /// </summary>
+        /// <param name="other">The object to compare with.</param>
+        /// <returns>Returns true if <c>this</c> and <paramref name="other"/> are equal.</returns>
+        public bool Equals(ClipDrawOptions other)
+        {
+            return errorText == other.errorText &&
+                tooltip == other.tooltip &&
+                highlightColor == other.highlightColor &&
+                System.Linq.Enumerable.SequenceEqual(icons, other.icons);
+        }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>A 32-bit signed integer that is the hash code for this instance.</returns>
+        public override int GetHashCode()
+        {
+            return HashUtility.CombineHash(
+                errorText != null ? errorText.GetHashCode() : 0,
+                tooltip != null ? tooltip.GetHashCode() : 0,
+                highlightColor.GetHashCode(),
+                icons != null ? icons.GetHashCode() : 0
+            );
+        }
+
+        /// <summary>
+        /// Compares two <c>ClipDrawOptions</c> objects.
+        /// </summary>
+        /// <param name="options1">The first object.</param>
+        /// <param name="options2">The second object.</param>
+        /// <returns>Returns true if they are equal.</returns>
+        public static bool operator ==(ClipDrawOptions options1, ClipDrawOptions options2)
+        {
+            return options1.Equals(options2);
+        }
+
+        /// <summary>
+        /// Compares two <c>ClipDrawOptions</c> objects.
+        /// </summary>
+        /// <param name="options1">The first object.</param>
+        /// <param name="options2">The second object.</param>
+        /// <returns>Returns true if they are not equal.</returns>
+        public static bool operator !=(ClipDrawOptions options1, ClipDrawOptions options2)
+        {
+            return !options1.Equals(options2);
+        }
+    }
+
+    /// <summary>
+    /// Use this class to customize clip types in the TimelineEditor.
+    /// </summary>
+    public class ClipEditor
+    {
+        static readonly string k_NoPlayableAssetError = L10n.Tr("This clip does not contain a valid playable asset");
+        static readonly string k_ScriptLoadError = L10n.Tr("The associated script can not be loaded");
+
+        internal readonly bool supportsSubTimelines;
+
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        public ClipEditor()
+        {
+            supportsSubTimelines = TypeUtility.HasOverrideMethod(GetType(), nameof(GetSubTimelines));
+        }
+
+        /// <summary>
+        /// Implement this method to override the default options for drawing a clip.
+        /// </summary>
+        /// <param name="clip">The clip being drawn.</param>
+        /// <returns>The options for drawing a clip.</returns>
+        public virtual ClipDrawOptions GetClipOptions(TimelineClip clip)
+        {
+            return new ClipDrawOptions()
+            {
+                errorText = GetErrorText(clip),
+                tooltip = string.Empty,
+                highlightColor = GetDefaultHighlightColor(clip),
+                icons = System.Linq.Enumerable.Empty<Texture2D>()
+            };
+        }
+
+        /// <summary>
+        /// Override this method to draw a background for a clip .
+        /// </summary>
+        /// <param name="clip">The clip being drawn.</param>
+        /// <param name="region">The on-screen area where the clip is drawn.</param>
+        public virtual void DrawBackground(TimelineClip clip, ClipBackgroundRegion region)
+        {
+        }
+
+        /// <summary>
+        /// Called when a clip is created.
+        /// </summary>
+        /// <param name="clip">The newly created clip.</param>
+        /// <param name="track">The track that the clip is assigned to.</param>
+        /// <param name="clonedFrom">The source that the clip was copied from. This can be set to null if the clip is not a copy.</param>
+        /// <remarks>
+        /// The callback occurs before the clip is assigned to the track.
+        /// </remarks>
+        public virtual void OnCreate(TimelineClip clip, TrackAsset track, TimelineClip clonedFrom)
+        {
+        }
+
+        /// <summary>
+        /// Gets the error text for the specified clip.
+        /// </summary>
+        /// <param name="clip">The clip being drawn.</param>
+        /// <returns>Returns the error text to be displayed as the tool tip for the clip. If there is no error to be displayed, this method returns string.Empty.</returns>
+        public string GetErrorText(TimelineClip clip)
+        {
+            if (clip == null || clip.asset == null)
+                return k_NoPlayableAssetError;
+
+            var playableAsset = clip.asset as ScriptableObject;
+            if (playableAsset == null || MonoScript.FromScriptableObject(playableAsset) == null)
+                return k_ScriptLoadError;
+
+            return string.Empty;
+        }
+
+        /// <summary>
+        /// The color drawn under the clip. By default, the color is the same as the track color.
+        /// </summary>
+        /// <param name="clip">The clip being drawn.</param>
+        /// <returns>Returns the highlight color of the clip being drawn.</returns>
+        public Color GetDefaultHighlightColor(TimelineClip clip)
+        {
+            if (clip == null)
+                return Color.white;
+
+            return TrackResourceCache.GetTrackColor(clip.GetParentTrack());
+        }
+
+        /// <summary>
+        /// Called when a clip is changed by the Editor.
+        /// </summary>
+        /// <param name="clip">The clip that changed.</param>
+        public virtual void OnClipChanged(TimelineClip clip)
+        {
+        }
+
+        /// <summary>
+        /// Gets the sub-timelines for a specific clip. Implement this method if your clip supports playing nested timelines.
+        /// </summary>
+        /// <param name="clip">The clip with the ControlPlayableAsset.</param>
+        /// <param name="director">The playable director driving the Timeline Clip. This may not be the same as TimelineEditor.inspectedDirector.</param>
+        /// <param name="subTimelines">Specify the sub-timelines to control.</param>
+        public virtual void GetSubTimelines(TimelineClip clip, PlayableDirector director, List<PlayableDirector> subTimelines)
+        {
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/CustomEditors/ClipEditor.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 2537ddddebaa455409dec422eb08fd7e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/CustomEditors/CustomTimelineEditorCache.cs

@@ -0,0 +1,155 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    class CustomTimelineEditorCache
+    {
+        static class SubClassCache<TEditorClass> where TEditorClass : class, new()
+        {
+            private static Type[] s_SubClasses = null;
+            private static readonly TEditorClass s_DefaultInstance = new TEditorClass();
+            private static readonly Dictionary<System.Type, TEditorClass> s_TypeMap = new Dictionary<Type, TEditorClass>();
+
+            public static TEditorClass DefaultInstance
+            {
+                get { return s_DefaultInstance; }
+            }
+
+            static Type[] SubClasses
+            {
+                get
+                {
+                    // order the subclass array by built-ins then user defined so built-in classes are chosen first
+                    return s_SubClasses ??
+                        (s_SubClasses = TypeCache.GetTypesDerivedFrom<TEditorClass>().OrderBy(t => t.Assembly == typeof(UnityEditor.Timeline.TimelineEditor).Assembly ? 1 : 0).ToArray());
+                }
+            }
+
+            public static TEditorClass GetEditorForType(Type type)
+            {
+                TEditorClass editorClass = null;
+                if (!s_TypeMap.TryGetValue(type, out editorClass) || editorClass == null)
+                {
+                    Type editorClassType = null;
+                    Type searchType = type;
+                    while (searchType != null)
+                    {
+                        // search our way up the runtime class hierarchy so we get the best match
+                        editorClassType = GetExactEditorClassForType(searchType);
+                        if (editorClassType != null)
+                            break;
+                        searchType = searchType.BaseType;
+                    }
+
+                    if (editorClassType == null)
+                    {
+                        editorClass = s_DefaultInstance;
+                    }
+                    else
+                    {
+                        try
+                        {
+                            editorClass = (TEditorClass)Activator.CreateInstance(editorClassType);
+                        }
+                        catch (Exception e)
+                        {
+                            Debug.LogWarningFormat("Could not create a Timeline editor class of type {0}: {1}", editorClassType, e.Message);
+                            editorClass = s_DefaultInstance;
+                        }
+                    }
+
+                    s_TypeMap[type] = editorClass;
+                }
+
+                return editorClass;
+            }
+
+            private static Type GetExactEditorClassForType(Type type)
+            {
+                foreach (var subClass in SubClasses)
+                {
+                    // first check for exact match
+                    var attr = (CustomTimelineEditorAttribute)Attribute.GetCustomAttribute(subClass, typeof(CustomTimelineEditorAttribute), false);
+                    if (attr != null && attr.classToEdit == type)
+                    {
+                        return subClass;
+                    }
+                }
+
+                return null;
+            }
+
+            public static void Clear()
+            {
+                s_TypeMap.Clear();
+                s_SubClasses = null;
+            }
+        }
+
+        public static TEditorClass GetEditorForType<TEditorClass, TRuntimeClass>(Type type) where TEditorClass : class, new()
+        {
+            if (type == null)
+                throw new ArgumentNullException(nameof(type));
+
+            if (!typeof(TRuntimeClass).IsAssignableFrom(type))
+                throw new ArgumentException(type.FullName + " does not inherit from" + typeof(TRuntimeClass));
+
+            return SubClassCache<TEditorClass>.GetEditorForType(type);
+        }
+
+        public static void ClearCache<TEditorClass>() where TEditorClass : class, new()
+        {
+            SubClassCache<TEditorClass>.Clear();
+        }
+
+        public static ClipEditor GetClipEditor(TimelineClip clip)
+        {
+            if (clip == null)
+                throw new ArgumentNullException(nameof(clip));
+
+            var type = typeof(IPlayableAsset);
+            if (clip.asset != null)
+                type = clip.asset.GetType();
+
+            if (!typeof(IPlayableAsset).IsAssignableFrom(type))
+                return GetDefaultClipEditor();
+
+            return GetEditorForType<ClipEditor, IPlayableAsset>(type);
+        }
+
+        public static ClipEditor GetDefaultClipEditor()
+        {
+            return SubClassCache<ClipEditor>.DefaultInstance;
+        }
+
+        public static TrackEditor GetTrackEditor(TrackAsset track)
+        {
+            if (track == null)
+                throw new ArgumentNullException(nameof(track));
+
+            return GetEditorForType<TrackEditor, TrackAsset>(track.GetType());
+        }
+
+        public static TrackEditor GetDefaultTrackEditor()
+        {
+            return SubClassCache<TrackEditor>.DefaultInstance;
+        }
+
+        public static MarkerEditor GetMarkerEditor(IMarker marker)
+        {
+            if (marker == null)
+                throw new ArgumentNullException(nameof(marker));
+            return GetEditorForType<MarkerEditor, IMarker>(marker.GetType());
+        }
+
+        public static MarkerEditor GetDefaultMarkerEditor()
+        {
+            return SubClassCache<MarkerEditor>.DefaultInstance;
+        }
+    }
+}

Library/PackageCache/com.unity.timeline@1.7.5/Editor/CustomEditors/CustomTimelineEditorCache.cs.meta

@@ -0,0 +1,11 @@
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+guid: fd6ede1d2f47ab146b2ec0a3969a37cc
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Library/PackageCache/com.unity.timeline@1.7.5/Editor/CustomEditors/MarkerEditor.cs

@@ -0,0 +1,292 @@
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    /// <summary>
+    /// The flags that indicate the view status of a marker.
+    /// </summary>
+    [System.Flags]
+    public enum MarkerUIStates
+    {
+        /// <summary>
+        /// No extra state specified.
+        /// </summary>
+        None = 0,
+
+        /// <summary>
+        /// The marker is selected.
+        /// </summary>
+        Selected = 1 << 0,
+
+        /// <summary>
+        /// The marker is in a collapsed state.
+        /// </summary>
+        Collapsed = 1 << 1
+    }
+
+    /// <summary>
+    /// The user-defined options for drawing a marker.
+    /// </summary>
+    public struct MarkerDrawOptions
+    {
+        /// <summary>
+        /// The tooltip for the marker.
+        /// </summary>
+        public string tooltip { get; set; }
+
+        /// <summary>
+        /// Text that indicates if the marker should display an error.
+        /// </summary>
+        /// <remarks>
+        /// If the error text is not empty or null, then the marker displays a warning. The error text is used as the tooltip.
+        /// </remarks>
+        public string errorText { get; set; }
+
+        /// <summary>
+        /// Indicates whether this instance and a specified object are equal.
+        /// </summary>
+        /// <param name="obj">The object to compare with the current instance.</param>
+        /// <returns>Returns <c>true</c> if <paramref name="obj"/> and this instance are the same type and represent the same value.</returns>
+        public override bool Equals(object obj)
+        {
+            if (!(obj is MarkerDrawOptions))
+                return false;
+
+            return Equals((MarkerDrawOptions)obj);
+        }
+
+        /// <summary>
+        /// Compares this object with another <c>MarkerDrawOptions</c>.
+        /// </summary>
+        /// <param name="other">The object to compare with.</param>
+        /// <returns>Returns true if <c>this</c> and <paramref name="other"/> are equal.</returns>
+        public bool Equals(MarkerDrawOptions other)
+        {
+            return errorText == other.errorText &&
+                tooltip == other.tooltip;
+        }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>A 32-bit signed integer that is the hash code for this instance.</returns>
+        public override int GetHashCode()
+        {
+            return HashUtility.CombineHash(
+                errorText != null ? errorText.GetHashCode() : 0,
+                tooltip != null ? tooltip.GetHashCode() : 0
+            );
+        }
+
+        /// <summary>
+        /// Compares two <c>MarkerDrawOptions</c> objects.
+        /// </summary>
+        /// <param name="options1">The first object.</param>
+        /// <param name="options2">The second object.</param>
+        /// <returns>Returns true if they are equal.</returns>
+        public static bool operator ==(MarkerDrawOptions options1, MarkerDrawOptions options2)
+        {
+            return options1.Equals(options2);
+        }
+
+        /// <summary>
+        /// Compares two <c>MarkerDrawOptions</c> objects.
+        /// </summary>
+        /// <param name="options1">The first object.</param>
+        /// <param name="options2">The second object.</param>
+        /// <returns>Returns true if they are not equal.</returns>
+        public static bool operator !=(MarkerDrawOptions options1, MarkerDrawOptions options2)
+        {
+            return !options1.Equals(options2);
+        }
+    }
+
+
+    /// <summary>
+    /// The description of the on-screen area where the marker is drawn.
+    /// </summary>
+    public struct MarkerOverlayRegion
+    {
+        /// <summary>
+        /// The area where the marker is being drawn.
+        /// </summary>
+        public Rect markerRegion { get; private set; }
+
+        /// <summary>
+        /// The area where the overlay is being drawn.
+        ///
+        /// This region extends from the top of the time ruler to the bottom of the window, excluding any scrollbars.
+        /// </summary>
+        public Rect timelineRegion { get; private set; }
+
+        /// <summary>
+        /// The sub-area of the timelineRegion where the tracks are drawn.
+        ///
+        /// The region extends from the bottom of the time ruler, or the timeline marker region if not hidden.
+        /// Use this region to clip overlays that should not be drawn over the timeline marker region or time ruler.
+        /// </summary>
+        /// <example>
+        /// <code source="../../DocCodeExamples/MarkerEditorExamples.cs" region="declare-trackRegion" title="trackRegion"/>
+        /// </example>
+        public Rect trackRegion => Rect.MinMaxRect(timelineRegion.xMin, timelineRegion.yMin + m_TrackOffset, timelineRegion.xMax, timelineRegion.yMax);
+
+        /// <summary>
+        /// The start time of the visible region of the window.
+        /// </summary>
+        public double startTime { get; private set; }
+
+        /// <summary>
+        /// The end time of the visible region of the window.
+        /// </summary>
+        public double endTime { get; private set; }
+
+        private float m_TrackOffset;
+
+        /// <summary>Constructor</summary>
+        /// <param name="_markerRegion">The area where the marker is being drawn.</param>
+        /// <param name="_timelineRegion">The area where the overlay is being drawn.</param>
+        /// <param name="_startTime">The start time of the visible region of the window.</param>
+        /// <param name="_endTime">The end time of the visible region of the window.</param>
+        public MarkerOverlayRegion(Rect _markerRegion, Rect _timelineRegion, double _startTime, double _endTime)
+            : this(_markerRegion, _timelineRegion, _startTime, _endTime, 19.0f)
+        {
+        }
+
+        /// <summary>Constructor</summary>
+        /// <param name="_markerRegion">The area where the marker is being drawn.</param>
+        /// <param name="_timelineRegion">The area where the overlay is being drawn.</param>
+        /// <param name="_startTime">The start time of the visible region of the window.</param>
+        /// <param name="_endTime">The end time of the visible region of the window.</param>
+        /// <param name="_trackOffset">The offset from the timelineRegion to the trackRegion</param>
+        public MarkerOverlayRegion(Rect _markerRegion, Rect _timelineRegion, double _startTime, double _endTime, float _trackOffset)
+        {
+            markerRegion = _markerRegion;
+            timelineRegion = _timelineRegion;
+            startTime = _startTime;
+            endTime = _endTime;
+            m_TrackOffset = _trackOffset;
+        }
+
+        /// <summary>
+        /// Indicates whether this instance and a specified object are equal.
+        /// </summary>
+        /// <param name="obj">The object to compare with the current instance.</param>
+        /// <returns>Returns <c>true</c> if <paramref name="obj"/> and this instance are the same type and represent the same value.</returns>
+        public override bool Equals(object obj)
+        {
+            if (!(obj is MarkerOverlayRegion))
+                return false;
+
+            return Equals((MarkerOverlayRegion)obj);
+        }
+
+        /// <summary>
+        /// Compares this object with another <c>MarkerOverlayRegion</c>.
+        /// </summary>
+        /// <param name="other">The object to compare with.</param>
+        /// <returns>Returns true if <c>this</c> and <paramref name="other"/> are equal.</returns>
+        public bool Equals(MarkerOverlayRegion other)
+        {
+            return markerRegion == other.markerRegion &&
+                timelineRegion == other.timelineRegion &&
+                startTime == other.startTime &&
+                endTime == other.endTime &&
+                m_TrackOffset == other.m_TrackOffset;
+        }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>A 32-bit signed integer that is the hash code for this instance.</returns>
+        public override int GetHashCode()
+        {
+            return HashUtility.CombineHash(
+                markerRegion.GetHashCode(),
+                timelineRegion.GetHashCode(),
+                startTime.GetHashCode(),
+                endTime.GetHashCode(),
+                m_TrackOffset.GetHashCode()
+            );
+        }
+
+        /// <summary>
+        /// Compares two <c>MarkerOverlayRegion</c> objects.
+        /// </summary>
+        /// <param name="region1">The first object.</param>
+        /// <param name="region2">The second object.</param>
+        /// <returns>Returns true if they are equal.</returns>
+        public static bool operator ==(MarkerOverlayRegion region1, MarkerOverlayRegion region2)
+        {
+            return region1.Equals(region2);
+        }
+
+        /// <summary>
+        /// Compares two <c>MarkerOverlayRegion</c> objects.
+        /// </summary>
+        /// <param name="region1">The first object.</param>
+        /// <param name="region2">The second object.</param>
+        /// <returns>Returns true if they are not equal.</returns>
+        public static bool operator !=(MarkerOverlayRegion region1, MarkerOverlayRegion region2)
+        {
+            return !region1.Equals(region2);
+        }
+    }
+
+    /// <summary>
+    /// Use this class to customize marker types in the TimelineEditor.
+    /// </summary>
+    public class MarkerEditor
+    {
+        internal readonly bool supportsDrawOverlay;
+
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        public MarkerEditor()
+        {
+            supportsDrawOverlay = TypeUtility.HasOverrideMethod(GetType(), nameof(DrawOverlay));
+        }
+
+        /// <summary>
+        /// Implement this method to override the default options for drawing a marker.
+        /// </summary>
+        /// <param name="marker">The marker to draw.</param>
+        /// <returns></returns>
+        public virtual MarkerDrawOptions GetMarkerOptions(IMarker marker)
+        {
+            return new MarkerDrawOptions()
+            {
+                tooltip = string.Empty,
+                errorText = string.Empty,
+            };
+        }
+
+        /// <summary>
+        /// Called when a marker is created.
+        /// </summary>
+        /// <param name="marker">The marker that is created.</param>
+        /// <param name="clonedFrom">TThe source that the marker was copied from. This can be set to null if the marker is not a copy.</param>
+        /// <remarks>
+        /// The callback occurs before the marker is assigned to the track.
+        /// </remarks>
+        public virtual void OnCreate(IMarker marker, IMarker clonedFrom)
+        {
+        }
+
+        /// <summary>
+        /// Draws additional overlays for a marker.
+        /// </summary>
+        /// <param name="marker">The marker to draw.</param>
+        /// <param name="uiState">The visual state of the marker.</param>
+        /// <param name="region">The on-screen area where the marker is being drawn.</param>
+        /// <remarks>
+        /// Notes:
+        /// * It is only called during TimelineWindow's Repaint step.
+        /// * If there are multiple markers on top of each other, only the topmost marker receives the DrawOverlay call.
+        /// </remarks>
+        public virtual void DrawOverlay(IMarker marker, MarkerUIStates uiState, MarkerOverlayRegion region)
+        {
+        }
+    }
+}