Merge pull request #33960 from bdach/catch-timestamp-support

Read & output combo indices in timestamps in catch editor

osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs

@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -219,5 +220,40 @@ namespace osu.Game.Rulesets.Catch.Edit
             distanceSnapGrid.StartTime = sourceHitObject.GetEndTime();
             distanceSnapGrid.StartX = sourceHitObject.EffectiveX;
         }
+
+        #region Clipboard handling
+
+        public override string ConvertSelectionToString()
+            => string.Join(',', EditorBeatmap.SelectedHitObjects.Cast<CatchHitObject>().OrderBy(h => h.StartTime).Select(h => (h.IndexInCurrentCombo + 1).ToString()));
+
+        // 1,2,3,4 ...
+        private static readonly Regex selection_regex = new Regex(@"^\d+(,\d+)*$", RegexOptions.Compiled);
+
+        public override void SelectFromTimestamp(double timestamp, string objectDescription)
+        {
+            if (!selection_regex.IsMatch(objectDescription))
+                return;
+
+            List<CatchHitObject> remainingHitObjects = EditorBeatmap.HitObjects.Cast<CatchHitObject>().Where(h => h.StartTime >= timestamp).ToList();
+            string[] splitDescription = objectDescription.Split(',');
+
+            for (int i = 0; i < splitDescription.Length; i++)
+            {
+                if (!int.TryParse(splitDescription[i], out int combo) || combo < 1)
+                    continue;
+
+                CatchHitObject? current = remainingHitObjects.FirstOrDefault(h => h.IndexInCurrentCombo + 1 == combo);
+
+                if (current == null)
+                    continue;
+
+                EditorBeatmap.SelectedHitObjects.Add(current);
+
+                if (i < splitDescription.Length - 1)
+                    remainingHitObjects = remainingHitObjects.Where(h => h != current && h.StartTime >= current.StartTime).ToList();
+            }
+        }
+
+        #endregion
     }
 }