Inital commit

1 files changed, 812 insertions, 0 deletions

diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Editor/treeview/TimelineTrackGUI.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/treeview/TimelineTrackGUI.cs
new file mode 100644
index 0000000..c15d96d
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/treeview/TimelineTrackGUI.cs
@@ -0,0 +1,812 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.IMGUI.Controls;
+using UnityEditor.StyleSheets;
+using UnityEngine;
+using UnityEngine.Timeline;
+using UnityEngine.Playables;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    class TimelineTrackGUI : TimelineGroupGUI, IClipCurveEditorOwner, IRowGUI
+    {
+        struct TrackDrawData
+        {
+            public bool                 m_AllowsRecording;
+            public bool                 m_ShowTrackBindings;
+            public bool                 m_HasBinding;
+            public bool                 m_IsSubTrack;
+            public PlayableBinding      m_Binding;
+            public UnityEngine.Object   m_TrackBinding;
+            public Texture              m_TrackIcon;
+        }
+
+        static class Styles
+        {
+            public static readonly string kArmForRecordDisabled = L10n.Tr("Recording is not permitted when Track Offsets are set to Auto. Track Offset settings can be changed in the track menu of the base track.");
+            public static Texture2D kProblemIcon = DirectorStyles.GetBackgroundImage(DirectorStyles.Instance.warning);
+        }
+
+        static GUIContent s_ArmForRecordContentOn;
+        static GUIContent s_ArmForRecordContentOff;
+        static GUIContent s_ArmForRecordDisabled;
+
+        bool m_InlineCurvesSkipped;
+        int m_TrackHash = -1;
+        int m_BlendHash = -1;
+        int m_LastDirtyIndex = -1;
+
+        readonly InfiniteTrackDrawer    m_InfiniteTrackDrawer;
+        TrackItemsDrawer                m_ItemsDrawer;
+        TrackDrawData                   m_TrackDrawData;
+        TrackDrawOptions                m_TrackDrawOptions;
+        readonly TrackEditor            m_TrackEditor;
+        readonly GUIContent             m_DefaultTrackIcon;
+
+
+        public override bool expandable
+        {
+            get { return hasChildren; }
+        }
+
+        internal InlineCurveEditor inlineCurveEditor { get; set; }
+
+        public ClipCurveEditor clipCurveEditor { get; private set; }
+
+        public bool inlineCurvesSelected
+        {
+            get { return SelectionManager.IsCurveEditorFocused(this); }
+            set
+            {
+                if (!value && SelectionManager.IsCurveEditorFocused(this))
+                    SelectionManager.SelectInlineCurveEditor(null);
+                else
+                    SelectionManager.SelectInlineCurveEditor(this);
+            }
+        }
+
+        bool IClipCurveEditorOwner.showLoops
+        {
+            get { return false; }
+        }
+
+        TrackAsset IClipCurveEditorOwner.owner
+        {
+            get { return track; }
+        }
+
+        static bool DoesTrackAllowsRecording(TrackAsset track)
+        {
+            // if the root animation track is in auto mode, recording is not allowed
+            var animTrack = TimelineUtility.GetSceneReferenceTrack(track) as AnimationTrack;
+            if (animTrack != null)
+                return animTrack.trackOffset != TrackOffset.Auto;
+
+            return false;
+        }
+
+        bool? m_TrackHasAnimatableParameters;
+        bool trackHasAnimatableParameters
+        {
+            get
+            {
+                // cache this value to avoid the recomputation
+                if (!m_TrackHasAnimatableParameters.HasValue)
+                    m_TrackHasAnimatableParameters = track.HasAnyAnimatableParameters() ||
+                        track.clips.Any(c => c.HasAnyAnimatableParameters());
+
+                return m_TrackHasAnimatableParameters.Value;
+            }
+        }
+
+        public bool locked
+        {
+            get { return track.lockedInHierarchy; }
+        }
+
+        public bool showMarkers
+        {
+            get { return track.GetShowMarkers(); }
+        }
+
+        public bool muted
+        {
+            get { return track.muted; }
+        }
+
+        public List<TimelineClipGUI> clips
+        {
+            get
+            {
+                return m_ItemsDrawer.clips == null ? new List<TimelineClipGUI>(0) : m_ItemsDrawer.clips.ToList();
+            }
+        }
+
+        TrackAsset IRowGUI.asset { get { return track; } }
+
+        bool showTrackRecordingDisabled
+        {
+            get
+            {
+                // if the root animation track is in auto mode, recording is not allowed
+                var animTrack = TimelineUtility.GetSceneReferenceTrack(track) as AnimationTrack;
+                return animTrack != null && animTrack.trackOffset == TrackOffset.Auto;
+            }
+        }
+
+        public TimelineTrackGUI(TreeViewController tv, TimelineTreeViewGUI w, int id, int depth, TreeViewItem parent, string displayName, TrackAsset sequenceActor)
+            : base(tv, w, id, depth, parent, displayName, sequenceActor, false)
+        {
+            AnimationTrack animationTrack = sequenceActor as AnimationTrack;
+            if (animationTrack != null)
+                m_InfiniteTrackDrawer = new InfiniteTrackDrawer(new AnimationTrackKeyDataSource(animationTrack));
+            else if (sequenceActor.HasAnyAnimatableParameters() && !sequenceActor.clips.Any())
+                m_InfiniteTrackDrawer = new InfiniteTrackDrawer(new TrackPropertyCurvesDataSource(sequenceActor));
+
+            UpdateInfiniteClipEditor(w.TimelineWindow);
+
+            var bindings = track.outputs.ToArray();
+            m_TrackDrawData.m_HasBinding = bindings.Length > 0;
+            if (m_TrackDrawData.m_HasBinding)
+                m_TrackDrawData.m_Binding = bindings[0];
+            m_TrackDrawData.m_IsSubTrack = IsSubTrack();
+            m_TrackDrawData.m_AllowsRecording = DoesTrackAllowsRecording(sequenceActor);
+            m_DefaultTrackIcon = TrackResourceCache.GetTrackIcon(track);
+
+
+            m_TrackEditor = CustomTimelineEditorCache.GetTrackEditor(sequenceActor);
+
+            try
+            {
+                m_TrackDrawOptions = m_TrackEditor.GetTrackOptions(track, null);
+            }
+            catch (Exception e)
+            {
+                Debug.LogException(e);
+                m_TrackDrawOptions = CustomTimelineEditorCache.GetDefaultTrackEditor().GetTrackOptions(track, null);
+            }
+
+            m_TrackDrawOptions.errorText = null; // explicitly setting to null for an uninitialized state
+
+            RebuildGUICacheIfNecessary();
+        }
+
+        public override float GetVerticalSpacingBetweenTracks()
+        {
+            if (track != null && track.isSubTrack)
+                return 1.0f; // subtracks have less of a gap than tracks
+            return base.GetVerticalSpacingBetweenTracks();
+        }
+
+        void UpdateInfiniteClipEditor(TimelineWindow window)
+        {
+            if (clipCurveEditor != null || track == null || !track.ShouldShowInfiniteClipEditor())
+                return;
+
+            var dataSource = CurveDataSource.Create(this);
+            clipCurveEditor = new ClipCurveEditor(dataSource, window, track);
+        }
+
+        void DetectTrackChanged()
+        {
+            if (Event.current.type == EventType.Layout)
+            {
+                // incremented when a track or it's clips changed
+                if (m_LastDirtyIndex != track.DirtyIndex)
+                {
+                    try
+                    {
+                        m_TrackEditor.OnTrackChanged(track);
+                    }
+                    catch (Exception e)
+                    {
+                        Debug.LogException(e);
+                    }
+                    m_LastDirtyIndex = track.DirtyIndex;
+                }
+                OnTrackChanged();
+            }
+        }
+
+        // Called when the source track data, including it's clips have changed has changed.
+        void OnTrackChanged()
+        {
+            // recompute blends if necessary
+            int newBlendHash = BlendHash();
+            if (m_BlendHash != newBlendHash)
+            {
+                UpdateClipOverlaps();
+                m_BlendHash = newBlendHash;
+            }
+
+            RebuildGUICacheIfNecessary();
+        }
+
+        void UpdateDrawData(WindowState state)
+        {
+            if (Event.current.type == EventType.Layout)
+            {
+                m_TrackDrawData.m_ShowTrackBindings = false;
+                m_TrackDrawData.m_TrackBinding = null;
+
+
+                if (state.editSequence.director != null && showSceneReference)
+                {
+                    m_TrackDrawData.m_ShowTrackBindings = state.GetWindow().currentMode.ShouldShowTrackBindings(state);
+                    m_TrackDrawData.m_TrackBinding = state.editSequence.director.GetGenericBinding(track);
+                }
+
+                var lastError = m_TrackDrawOptions.errorText;
+                var lastHeight = m_TrackDrawOptions.minimumHeight;
+                try
+                {
+                    m_TrackDrawOptions = m_TrackEditor.GetTrackOptions(track, m_TrackDrawData.m_TrackBinding);
+                }
+                catch (Exception e)
+                {
+                    Debug.LogException(e);
+                    m_TrackDrawOptions = CustomTimelineEditorCache.GetDefaultTrackEditor().GetTrackOptions(track, m_TrackDrawData.m_TrackBinding);
+                }
+
+                m_TrackDrawData.m_AllowsRecording = DoesTrackAllowsRecording(track);
+                m_TrackDrawData.m_TrackIcon = m_TrackDrawOptions.icon;
+                if (m_TrackDrawData.m_TrackIcon == null)
+                    m_TrackDrawData.m_TrackIcon = m_DefaultTrackIcon.image;
+
+                // track height has changed. need to update gui
+                if (!Mathf.Approximately(lastHeight, m_TrackDrawOptions.minimumHeight))
+                    state.Refresh();
+            }
+        }
+
+        public override void Draw(Rect headerRect, Rect contentRect, WindowState state)
+        {
+            DetectTrackChanged();
+            UpdateDrawData(state);
+
+            UpdateInfiniteClipEditor(state.GetWindow());
+
+            var trackHeaderRect = headerRect;
+            var trackContentRect = contentRect;
+
+            float inlineCurveHeight = contentRect.height - GetTrackContentHeight(state);
+            bool hasInlineCurve = inlineCurveHeight > 0.0f;
+
+            if (hasInlineCurve)
+            {
+                trackHeaderRect.height -= inlineCurveHeight;
+                trackContentRect.height -= inlineCurveHeight;
+            }
+
+            if (Event.current.type == EventType.Repaint)
+            {
+                m_TreeViewRect = trackContentRect;
+            }
+
+            if (s_ArmForRecordContentOn == null)
+                s_ArmForRecordContentOn = new GUIContent(DirectorStyles.GetBackgroundImage(DirectorStyles.Instance.autoKey, StyleState.active));
+
+            if (s_ArmForRecordContentOff == null)
+                s_ArmForRecordContentOff = new GUIContent(DirectorStyles.GetBackgroundImage(DirectorStyles.Instance.autoKey));
+
+            if (s_ArmForRecordDisabled == null)
+                s_ArmForRecordDisabled = new GUIContent(DirectorStyles.GetBackgroundImage(DirectorStyles.Instance.autoKey), Styles.kArmForRecordDisabled);
+
+            track.SetCollapsed(!isExpanded);
+
+            RebuildGUICacheIfNecessary();
+
+            // Prevents from drawing outside of bounds, but does not effect layout or markers
+            bool isOwnerDrawSucceed = false;
+
+            Vector2 visibleTime = state.timeAreaShownRange;
+
+            if (drawer != null)
+                isOwnerDrawSucceed = drawer.DrawTrack(trackContentRect, track, visibleTime, state);
+
+            if (!isOwnerDrawSucceed)
+            {
+                using (new GUIViewportScope(trackContentRect))
+                    DrawBackground(trackContentRect, track, visibleTime, state);
+
+                if (m_InfiniteTrackDrawer != null)
+                    m_InfiniteTrackDrawer.DrawTrack(trackContentRect, track, visibleTime, state);
+
+                // draw after user customization so overlay text shows up
+                using (new GUIViewportScope(trackContentRect))
+                    m_ItemsDrawer.Draw(trackContentRect, state);
+            }
+
+            DrawTrackHeader(trackHeaderRect, state);
+
+            if (hasInlineCurve)
+            {
+                var curvesHeaderRect = headerRect;
+                curvesHeaderRect.yMin = trackHeaderRect.yMax;
+
+                var curvesContentRect = contentRect;
+                curvesContentRect.yMin = trackContentRect.yMax;
+
+                DrawInlineCurves(curvesHeaderRect, curvesContentRect, state);
+            }
+
+            DrawTrackColorKind(headerRect);
+            DrawTrackState(contentRect, contentRect, track);
+        }
+
+        void DrawInlineCurves(Rect curvesHeaderRect, Rect curvesContentRect, WindowState state)
+        {
+            if (!track.GetShowInlineCurves())
+                return;
+
+            // Inline curves are not within the editor window -- case 952571
+            if (!IsInlineCurvesEditorInBounds(ToWindowSpace(curvesHeaderRect), curvesContentRect.height, state))
+            {
+                m_InlineCurvesSkipped = true;
+                return;
+            }
+
+            // If inline curves were skipped during the last event; we want to avoid rendering them until
+            // the next Layout event. Otherwise, we still get the RTE prevented above when the user resizes
+            // the timeline window very fast. -- case 952571
+            if (m_InlineCurvesSkipped && Event.current.type != EventType.Layout)
+                return;
+
+            m_InlineCurvesSkipped = false;
+
+            if (inlineCurveEditor == null)
+                inlineCurveEditor = new InlineCurveEditor(this);
+
+
+            curvesHeaderRect.x += DirectorStyles.kBaseIndent;
+            curvesHeaderRect.width -= DirectorStyles.kBaseIndent;
+
+            inlineCurveEditor.Draw(curvesHeaderRect, curvesContentRect, state);
+        }
+
+        static bool IsInlineCurvesEditorInBounds(Rect windowSpaceTrackRect, float inlineCurveHeight, WindowState state)
+        {
+            var legalHeight = state.windowHeight;
+            var trackTop = windowSpaceTrackRect.y;
+            var inlineCurveOffset = windowSpaceTrackRect.height - inlineCurveHeight;
+            return legalHeight - trackTop - inlineCurveOffset > 0;
+        }
+
+        void DrawErrorIcon(Rect position, WindowState state)
+        {
+            Rect bindingLabel = position;
+            bindingLabel.x = position.xMax + 3;
+            bindingLabel.width = state.bindingAreaWidth;
+            EditorGUI.LabelField(position, m_ProblemIcon);
+        }
+
+        void DrawBackground(Rect trackRect, TrackAsset trackAsset, Vector2 visibleTime, WindowState state)
+        {
+            bool canDrawRecordBackground = IsRecording(state);
+            if (canDrawRecordBackground)
+            {
+                DrawRecordingTrackBackground(trackRect, trackAsset, visibleTime, state);
+            }
+            else
+            {
+                Color trackBackgroundColor;
+
+                if (SelectionManager.Contains(track))
+                {
+                    trackBackgroundColor = state.IsEditingASubTimeline() ?
+                        DirectorStyles.Instance.customSkin.colorTrackSubSequenceBackgroundSelected :
+                        DirectorStyles.Instance.customSkin.colorTrackBackgroundSelected;
+                }
+                else
+                {
+                    trackBackgroundColor = state.IsEditingASubTimeline() ?
+                        DirectorStyles.Instance.customSkin.colorTrackSubSequenceBackground :
+                        DirectorStyles.Instance.customSkin.colorTrackBackground;
+                }
+
+                EditorGUI.DrawRect(trackRect, trackBackgroundColor);
+            }
+        }
+
+        float InlineCurveHeight()
+        {
+            return track.GetShowInlineCurves() && CanDrawInlineCurve()
+                ? TimelineWindowViewPrefs.GetInlineCurveHeight(track)
+                : 0.0f;
+        }
+
+        public override float GetHeight(WindowState state)
+        {
+            var height = GetTrackContentHeight(state);
+
+            if (CanDrawInlineCurve())
+                height += InlineCurveHeight();
+
+            return height;
+        }
+
+        float GetTrackContentHeight(WindowState state)
+        {
+            float height = m_TrackDrawOptions.minimumHeight;
+            if (height <= 0.0f)
+                height = TrackEditor.DefaultTrackHeight;
+            height = Mathf.Clamp(height, TrackEditor.MinimumTrackHeight, TrackEditor.MaximumTrackHeight);
+
+            return height * state.trackScale;
+        }
+
+        static bool CanDrawIcon(GUIContent icon)
+        {
+            return icon != null && icon != GUIContent.none && icon.image != null;
+        }
+
+        bool showSceneReference
+        {
+            get
+            {
+                return track != null &&
+                    m_TrackDrawData.m_HasBinding &&
+                    !m_TrackDrawData.m_IsSubTrack &&
+                    m_TrackDrawData.m_Binding.sourceObject != null &&
+                    m_TrackDrawData.m_Binding.outputTargetType != null &&
+                    typeof(Object).IsAssignableFrom(m_TrackDrawData.m_Binding.outputTargetType);
+            }
+        }
+
+        void DrawTrackHeader(Rect trackHeaderRect, WindowState state)
+        {
+            using (new GUIViewportScope(trackHeaderRect))
+            {
+                Rect rect = trackHeaderRect;
+
+                DrawHeaderBackground(trackHeaderRect);
+                rect.x += m_Styles.trackSwatchStyle.fixedWidth;
+
+                const float buttonSize = WindowConstants.trackHeaderButtonSize;
+                const float padding = WindowConstants.trackHeaderButtonPadding;
+                var buttonRect = new Rect(trackHeaderRect.xMax - buttonSize - padding, rect.y + ((rect.height - buttonSize) / 2f), buttonSize, buttonSize);
+
+                rect.x += DrawTrackIconKind(rect, state);
+                DrawTrackBinding(rect, trackHeaderRect);
+
+                if (track is GroupTrack)
+                    return;
+
+                buttonRect.x -= Spaced(DrawTrackDropDownMenu(buttonRect));
+                buttonRect.x -= Spaced(DrawLockMarkersButton(buttonRect, state));
+                buttonRect.x -= Spaced(DrawInlineCurveButton(buttonRect, state));
+                buttonRect.x -= Spaced(DrawMuteButton(buttonRect, state));
+                buttonRect.x -= Spaced(DrawLockButton(buttonRect, state));
+                buttonRect.x -= Spaced(DrawRecordButton(buttonRect, state));
+                buttonRect.x -= Spaced(DrawCustomTrackButton(buttonRect, state));
+            }
+        }
+
+        void DrawHeaderBackground(Rect headerRect)
+        {
+            Color backgroundColor = SelectionManager.Contains(track)
+                ? DirectorStyles.Instance.customSkin.colorSelection
+                : DirectorStyles.Instance.customSkin.colorTrackHeaderBackground;
+
+            var bgRect = headerRect;
+            bgRect.x += m_Styles.trackSwatchStyle.fixedWidth;
+            bgRect.width -= m_Styles.trackSwatchStyle.fixedWidth;
+
+            EditorGUI.DrawRect(bgRect, backgroundColor);
+        }
+
+        void DrawTrackColorKind(Rect rect)
+        {
+            // subtracks don't draw the color, the parent does that.
+            if (track != null && track.isSubTrack)
+                return;
+
+            if (rect.width <= 0) return;
+
+            using (new GUIColorOverride(m_TrackDrawOptions.trackColor))
+            {
+                rect.width = m_Styles.trackSwatchStyle.fixedWidth;
+                GUI.Label(rect, GUIContent.none, m_Styles.trackSwatchStyle);
+            }
+        }
+
+        float DrawTrackIconKind(Rect rect, WindowState state)
+        {
+            // no icons on subtracks
+            if (track != null && track.isSubTrack)
+                return 0.0f;
+
+            rect.yMin += (rect.height - 16f) / 2f;
+            rect.width = 16.0f;
+            rect.height = 16.0f;
+
+            if (!string.IsNullOrEmpty(m_TrackDrawOptions.errorText))
+            {
+                m_ProblemIcon.image = Styles.kProblemIcon;
+                m_ProblemIcon.tooltip = m_TrackDrawOptions.errorText;
+
+                if (CanDrawIcon(m_ProblemIcon))
+                    DrawErrorIcon(rect, state);
+            }
+            else
+            {
+                var content = GUIContent.Temp(m_TrackDrawData.m_TrackIcon, m_DefaultTrackIcon.tooltip);
+                if (CanDrawIcon(content))
+                    GUI.Box(rect, content, GUIStyle.none);
+            }
+
+            return rect.width;
+        }
+
+        void DrawTrackBinding(Rect rect, Rect headerRect)
+        {
+            if (m_TrackDrawData.m_ShowTrackBindings)
+            {
+                DoTrackBindingGUI(rect, headerRect);
+                return;
+            }
+
+            var textStyle = m_Styles.trackHeaderFont;
+            textStyle.normal.textColor = SelectionManager.Contains(track) ? Color.white : m_Styles.customSkin.colorTrackFont;
+
+            string trackName = track.name;
+
+            EditorGUI.BeginChangeCheck();
+
+            // by default the size is just the width of the string (for selection purposes)
+            rect.width = m_Styles.trackHeaderFont.CalcSize(new GUIContent(trackName)).x;
+
+            // if we are editing, supply the entire width of the header
+            if (GUIUtility.keyboardControl == track.GetInstanceID())
+                rect.width = (headerRect.xMax - rect.xMin) - (5 * WindowConstants.trackHeaderButtonSize);
+
+            trackName = EditorGUI.DelayedTextField(rect, GUIContent.none, track.GetInstanceID(), track.name, textStyle);
+
+            if (EditorGUI.EndChangeCheck())
+            {
+                TimelineUndo.PushUndo(track, "Rename Track");
+                track.name = trackName;
+            }
+        }
+
+        float DrawTrackDropDownMenu(Rect rect)
+        {
+            rect.y += WindowConstants.trackOptionButtonVerticalPadding;
+
+            if (GUI.Button(rect, GUIContent.none, m_Styles.trackOptions))
+            {
+                // the drop down will apply to all selected tracks
+                if (!SelectionManager.Contains(track))
+                {
+                    SelectionManager.Clear();
+                    SelectionManager.Add(track);
+                }
+
+                SequencerContextMenu.ShowTrackContextMenu(SelectionManager.SelectedTracks().ToArray(), null);
+            }
+
+            return WindowConstants.trackHeaderButtonSize;
+        }
+
+        bool CanDrawInlineCurve()
+        {
+            // Note: A track with animatable parameters always has inline curves.
+            return trackHasAnimatableParameters || TimelineUtility.TrackHasAnimationCurves(track);
+        }
+
+        float DrawInlineCurveButton(Rect rect, WindowState state)
+        {
+            if (!CanDrawInlineCurve())
+            {
+                return 0.0f;
+            }
+
+            // Override enable state to display "Show Inline Curves" button in disabled state.
+            bool prevEnabledState = GUI.enabled;
+            GUI.enabled = true;
+            var newValue = GUI.Toggle(rect, track.GetShowInlineCurves(), GUIContent.none, DirectorStyles.Instance.curves);
+            GUI.enabled = prevEnabledState;
+
+            if (newValue != track.GetShowInlineCurves())
+            {
+                track.SetShowInlineCurves(newValue);
+                state.GetWindow().treeView.CalculateRowRects();
+            }
+
+            return WindowConstants.trackHeaderButtonSize;
+        }
+
+        float DrawRecordButton(Rect rect, WindowState state)
+        {
+            if (m_TrackDrawData.m_AllowsRecording)
+            {
+                bool isPlayerDisabled = state.editSequence.director != null && !state.editSequence.director.isActiveAndEnabled;
+
+                GameObject goBinding = m_TrackDrawData.m_TrackBinding as GameObject;
+                if (goBinding == null)
+                {
+                    Component c = m_TrackDrawData.m_TrackBinding as Component;
+                    if (c != null)
+                        goBinding = c.gameObject;
+                }
+
+                if (goBinding == null && m_TrackDrawData.m_IsSubTrack)
+                {
+                    goBinding = ParentTrack().GetGameObjectBinding(state.editSequence.director);
+                }
+
+                bool isTrackBindingValid = goBinding != null;
+                bool trackErrorDisableButton = !string.IsNullOrEmpty(m_TrackDrawOptions.errorText) && isTrackBindingValid && goBinding.activeInHierarchy;
+                bool disableButton = track.lockedInHierarchy || isPlayerDisabled || trackErrorDisableButton || !isTrackBindingValid;
+                using (new EditorGUI.DisabledScope(disableButton))
+                {
+                    if (IsRecording(state))
+                    {
+                        state.editorWindow.Repaint();
+                        float remainder = Time.realtimeSinceStartup % 1;
+
+                        var animatedContent = s_ArmForRecordContentOn;
+                        if (remainder < 0.22f)
+                        {
+                            animatedContent = GUIContent.none;
+                        }
+                        if (GUI.Button(rect, animatedContent, GUIStyle.none) || isPlayerDisabled || !isTrackBindingValid)
+                        {
+                            state.UnarmForRecord(track);
+                        }
+                    }
+                    else
+                    {
+                        if (GUI.Button(rect, s_ArmForRecordContentOff, GUIStyle.none))
+                        {
+                            state.ArmForRecord(track);
+                        }
+                    }
+                    return WindowConstants.trackHeaderButtonSize;
+                }
+            }
+
+            if (showTrackRecordingDisabled)
+            {
+                using (new EditorGUI.DisabledScope(true))
+                    GUI.Button(rect, s_ArmForRecordDisabled, GUIStyle.none);
+                return k_ButtonSize;
+            }
+
+            return 0.0f;
+        }
+
+        float DrawCustomTrackButton(Rect rect, WindowState state)
+        {
+            if (drawer.DrawTrackHeaderButton(rect, track, state))
+            {
+                return WindowConstants.trackHeaderButtonSize;
+            }
+            return 0.0f;
+        }
+
+        float DrawLockMarkersButton(Rect rect, WindowState state)
+        {
+            if (track.GetMarkerCount() == 0)
+                return 0.0f;
+
+            var markersShown = showMarkers;
+            var style = TimelineWindow.styles.collapseMarkers;
+            if (Event.current.type == EventType.Repaint)
+                style.Draw(rect, GUIContent.none, false, false, markersShown, false);
+
+            // Override enable state to display "Show Marker" button in disabled state.
+            bool prevEnabledState = GUI.enabled;
+            GUI.enabled = true;
+            if (GUI.Button(rect, DirectorStyles.markerCollapseButton, GUIStyle.none))
+            {
+                state.GetWindow().SetShowTrackMarkers(track, !markersShown);
+            }
+            GUI.enabled = prevEnabledState;
+            return WindowConstants.trackHeaderButtonSize;
+        }
+
+        static void ObjectBindingField(Rect position, Object obj, PlayableBinding binding)
+        {
+            bool allowScene =
+                typeof(GameObject).IsAssignableFrom(binding.outputTargetType) ||
+                typeof(Component).IsAssignableFrom(binding.outputTargetType);
+
+            using (var check = new EditorGUI.ChangeCheckScope())
+            {
+                // FocusType.Passive so it never gets focused when pressing tab
+                int controlId = GUIUtility.GetControlID("s_ObjectFieldHash".GetHashCode(), FocusType.Passive, position);
+                var newObject = UnityEditorInternals.DoObjectField(EditorGUI.IndentedRect(position), obj, binding.outputTargetType, controlId, allowScene);
+                if (check.changed)
+                {
+                    BindingUtility.Bind(TimelineEditor.inspectedDirector, binding.sourceObject as TrackAsset, newObject);
+                }
+            }
+        }
+
+        void DoTrackBindingGUI(Rect rect, Rect headerRect)
+        {
+            var bindingRect = new Rect(
+                rect.xMin,
+                rect.y + (rect.height - WindowConstants.trackHeaderButtonSize) / 2f,
+                headerRect.xMax - WindowConstants.trackHeaderMaxButtonsWidth - rect.xMin,
+                WindowConstants.trackHeaderButtonSize);
+
+            if (bindingRect.Contains(Event.current.mousePosition) && TimelineDragging.IsDraggingEvent() && DragAndDrop.objectReferences.Length == 1)
+            {
+                TimelineDragging.HandleBindingDragAndDrop(track, BindingUtility.GetRequiredBindingType(m_TrackDrawData.m_Binding));
+                Event.current.Use();
+            }
+            else
+            {
+                if (m_TrackDrawData.m_Binding.outputTargetType != null && typeof(Object).IsAssignableFrom(m_TrackDrawData.m_Binding.outputTargetType))
+                {
+                    ObjectBindingField(bindingRect, m_TrackDrawData.m_TrackBinding, m_TrackDrawData.m_Binding);
+                }
+            }
+        }
+
+        bool IsRecording(WindowState state)
+        {
+            return state.recording && state.IsArmedForRecord(track);
+        }
+
+        // background to draw during recording
+        void DrawRecordingTrackBackground(Rect trackRect, TrackAsset trackAsset, Vector2 visibleTime, WindowState state)
+        {
+            if (drawer != null)
+                drawer.DrawRecordingBackground(trackRect, trackAsset, visibleTime, state);
+        }
+
+        void UpdateClipOverlaps()
+        {
+            TrackExtensions.ComputeBlendsFromOverlaps(track.clips);
+        }
+
+        internal void RebuildGUICacheIfNecessary()
+        {
+            if (m_TrackHash == track.Hash())
+                return;
+
+            m_ItemsDrawer = new TrackItemsDrawer(this);
+            m_TrackHash = track.Hash();
+        }
+
+        int BlendHash()
+        {
+            var hash = 0;
+            foreach (var clip in track.clips)
+            {
+                hash = HashUtility.CombineHash(hash,
+                    (clip.duration - clip.start).GetHashCode(),
+                    ((int)clip.blendInCurveMode).GetHashCode(),
+                    ((int)clip.blendOutCurveMode).GetHashCode());
+            }
+            return hash;
+        }
+
+        // callback when the corresponding graph is rebuilt. This can happen, but not have the GUI rebuilt.
+        public override void OnGraphRebuilt()
+        {
+            RefreshCurveEditor();
+        }
+
+        void RefreshCurveEditor()
+        {
+            var window = TimelineWindow.instance;
+            if (track != null && window != null && window.state != null)
+            {
+                bool hasEditor = clipCurveEditor != null;
+                bool shouldHaveEditor = track.ShouldShowInfiniteClipEditor();
+                if (hasEditor != shouldHaveEditor)
+                    window.state.AddEndFrameDelegate((x, currentEvent) =>
+                    {
+                        x.Refresh();
+                        return true;
+                    });
+            }
+        }
+    }
+}