1 files changed, 271 insertions, 0 deletions
diff --git a/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Manipulators/Move/MoveItemModeRipple.cs b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Manipulators/Move/MoveItemModeRipple.cs
new file mode 100644
index 0000000..aadf5f7
--- /dev/null
+++ b/Library/PackageCache/com.unity.timeline@1.2.13/Editor/Manipulators/Move/MoveItemModeRipple.cs
@@ -0,0 +1,271 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    class MoveItemModeRipple : IMoveItemMode, IMoveItemDrawer
+    {
+        const float k_SnapToEdgeDistance = 30.0f;
+
+        class PrevItemInfo
+        {
+            public ITimelineItem item;
+            public ITimelineItem firstSelectedItem;
+            public bool blending;
+
+            public PrevItemInfo(ITimelineItem item, ITimelineItem firstSelectedItem)
+            {
+                this.item = item;
+                this.firstSelectedItem = firstSelectedItem;
+                blending = item != null && item.end > firstSelectedItem.start;
+            }
+        }
+
+        readonly Dictionary<Object, List<ITimelineItem>> m_NextItems = new Dictionary<Object, List<ITimelineItem>>();
+        readonly Dictionary<Object, PrevItemInfo> m_PreviousItem = new Dictionary<Object, PrevItemInfo>();
+        double m_PreviousEnd;
+
+        bool m_TrackLocked;
+        bool m_Detached;
+
+        public void OnTrackDetach(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            if (m_TrackLocked)
+                return;
+
+            if (m_Detached)
+                return;
+
+            if (itemsGroups.Any(x => x.markers.Any()))
+                return;
+
+            // Ripple can either remove or not clips when detaching them from their track.
+            // Keep it off for now. TODO: add clutch key to toggle this feature?
+            //EditModeRippleUtils.Remove(manipulatedClipsList);
+
+            StartDetachMode(itemsGroups);
+        }
+
+        public void HandleTrackSwitch(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            // Nothing
+        }
+
+        public bool AllowTrackSwitch()
+        {
+            return !m_TrackLocked;
+        }
+
+        public double AdjustStartTime(WindowState state, ItemsPerTrack itemsGroup, double time)
+        {
+            var track = itemsGroup.targetTrack;
+            if (track == null)
+                return time;
+
+            double start;
+            double end;
+
+            if (EditModeUtils.IsInfiniteTrack(track))
+            {
+                EditModeUtils.GetInfiniteClipBoundaries(track, out start, out end);
+            }
+            else
+            {
+                var siblings = ItemsUtils.GetItemsExcept(track, itemsGroup.items);
+                var firstIntersectedItem = EditModeUtils.GetFirstIntersectedItem(siblings, time);
+
+                if (firstIntersectedItem == null)
+                    return time;
+
+                start = firstIntersectedItem.start;
+                end = firstIntersectedItem.end;
+            }
+
+            var closestTime = Math.Abs(time - start) < Math.Abs(time - end) ? start : end;
+
+            var pixelTime = state.TimeToPixel(time);
+            var pixelClosestTime = state.TimeToPixel(closestTime);
+
+            if (Math.Abs(pixelTime - pixelClosestTime) < k_SnapToEdgeDistance)
+                return closestTime;
+
+            return time;
+        }
+
+        void StartDetachMode(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            m_Detached = true;
+
+            foreach (var itemsGroup in itemsGroups)
+                EditModeUtils.SetParentTrack(itemsGroup.items, null);
+        }
+
+        public void OnModeClutchEnter(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            StartDetachMode(itemsGroups);
+            m_TrackLocked = false;
+        }
+
+        public void OnModeClutchExit(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            m_Detached = false;
+            m_TrackLocked = false;
+        }
+
+        public void BeginMove(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            m_NextItems.Clear();
+            m_PreviousItem.Clear();
+            var itemTypes = ItemsUtils.GetItemTypes(itemsGroups).ToList();
+
+            foreach (var itemsGroup in itemsGroups)
+            {
+                //can only ripple items of the same type as those selected
+                var sortedSelectedItems = itemsGroup.items.OrderBy(i => i.start).ToList();
+                var siblings = itemsGroup.targetTrack.GetItemsExcept(itemsGroup.items);
+                var sortedSiblingsToRipple = siblings.Where(i => itemTypes.Contains(i.GetType())).OrderBy(i => i.start).ToList();
+                var start = sortedSelectedItems.First().start;
+
+                m_NextItems.Add(itemsGroup.targetTrack, sortedSiblingsToRipple.Where(i => i.start > start).ToList());
+                m_PreviousItem.Add(itemsGroup.targetTrack, CalculatePrevItemInfo(sortedSelectedItems, sortedSiblingsToRipple, itemTypes));
+            }
+
+            m_PreviousEnd = itemsGroups.Max(m => m.items.Max(c => c.end));
+        }
+
+        public void UpdateMove(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            if (m_Detached)
+                return;
+
+            m_TrackLocked = true;
+
+            var overlap = 0.0;
+            foreach (var itemsGroup in itemsGroups)
+            {
+                var track = itemsGroup.targetTrack;
+                if (track == null) continue;
+
+                var prevItemInfo = m_PreviousItem[track];
+                if (prevItemInfo.item != null)
+                {
+                    var prevItem = prevItemInfo.item;
+                    var firstItem = prevItemInfo.firstSelectedItem;
+
+                    if (prevItemInfo.blending)
+                        prevItemInfo.blending = prevItem.end > firstItem.start;
+
+                    if (prevItemInfo.blending)
+                    {
+                        var b = EditModeUtils.BlendDuration(firstItem, TrimEdge.End);
+                        overlap = Math.Max(overlap, Math.Max(prevItem.start, prevItem.end - firstItem.end + firstItem.start + b) - firstItem.start);
+                    }
+                    else
+                    {
+                        overlap = Math.Max(overlap, prevItem.end - firstItem.start);
+                    }
+                }
+            }
+
+            if (overlap > 0)
+            {
+                foreach (var itemsGroup in itemsGroups)
+                {
+                    foreach (var item in itemsGroup.items)
+                        item.start += overlap;
+                }
+            }
+
+            var newEnd = itemsGroups.Max(m => m.items.Max(c => c.end));
+
+            var offset = newEnd - m_PreviousEnd;
+            m_PreviousEnd = newEnd;
+
+            foreach (var itemsGroup in itemsGroups)
+            {
+                foreach (var item in m_NextItems[itemsGroup.targetTrack])
+                    item.start += offset;
+            }
+        }
+
+        static PrevItemInfo CalculatePrevItemInfo(List<ITimelineItem> orderedSelection, List<ITimelineItem> orderedSiblings, IEnumerable<Type> itemTypes)
+        {
+            ITimelineItem previousItem = null;
+            ITimelineItem firstSelectedItem = null;
+            var gap = double.PositiveInfinity;
+
+            foreach (var type in itemTypes)
+            {
+                var firstSelectedItemOfType = orderedSelection.FirstOrDefault(i => i.GetType() == type);
+                if (firstSelectedItemOfType == null) continue;
+
+                var previousItemOfType = orderedSiblings.LastOrDefault(i => i.GetType() == type && i.start < firstSelectedItemOfType.start);
+                if (previousItemOfType == null) continue;
+
+                var currentGap = firstSelectedItemOfType.start - previousItemOfType.end;
+                if (currentGap < gap)
+                {
+                    gap = currentGap;
+                    firstSelectedItem = firstSelectedItemOfType;
+                    previousItem = previousItemOfType;
+                }
+            }
+
+            return new PrevItemInfo(previousItem, firstSelectedItem);
+        }
+
+        public bool ValidateMove(ItemsPerTrack itemsGroup)
+        {
+            return true;
+        }
+
+        public void FinishMove(IEnumerable<ItemsPerTrack> itemsGroups)
+        {
+            if (m_Detached)
+                EditModeRippleUtils.Insert(itemsGroups);
+
+            m_Detached = false;
+            m_TrackLocked = false;
+        }
+
+        public void DrawGUI(WindowState state, IEnumerable<MovingItems> movingItems, Color color)
+        {
+            if (m_Detached)
+            {
+                var xMin = float.MaxValue;
+                var xMax = float.MinValue;
+
+                foreach (var grabbedItems in movingItems)
+                {
+                    xMin = Math.Min(xMin, grabbedItems.onTrackItemsBounds.Min(b => b.xMin)); // TODO Cache this?
+                    xMax = Math.Max(xMax, grabbedItems.onTrackItemsBounds.Max(b => b.xMax));
+                }
+
+                foreach (var grabbedItems in movingItems)
+                {
+                    var bounds = Rect.MinMaxRect(xMin, grabbedItems.onTrackItemsBounds[0].yMin,
+                        xMax, grabbedItems.onTrackItemsBounds[0].yMax);
+
+                    EditModeGUIUtils.DrawOverlayRect(bounds, new Color(1.0f, 1.0f, 1.0f, 0.5f));
+
+                    EditModeGUIUtils.DrawBoundsEdge(bounds, color, TrimEdge.Start);
+                }
+            }
+            else
+            {
+                foreach (var grabbedItems in movingItems)
+                {
+                    var bounds = Rect.MinMaxRect(grabbedItems.onTrackItemsBounds.Min(b => b.xMin), grabbedItems.onTrackItemsBounds[0].yMin,
+                        grabbedItems.onTrackItemsBounds.Max(b => b.xMax), grabbedItems.onTrackItemsBounds[0].yMax);
+
+                    EditModeGUIUtils.DrawBoundsEdge(bounds, color, TrimEdge.Start);
+                }
+            }
+
+            TimelineCursors.SetCursor(TimelineCursors.CursorType.Ripple);
+        }
+    }
+}