Re-namespace files

osu.Game/Rulesets/UI/Scrolling/ScrollingRulesetContainer.cs

@@ -0,0 +1,112 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Lists;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.IO.Serialization;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Timing;
+
+namespace osu.Game.Rulesets.UI.Scrolling
+{
+    /// <summary>
+    /// A type of <see cref="RulesetContainer{TPlayfield,TObject}"/> that supports a <see cref="ScrollingPlayfield"/>.
+    /// <see cref="HitObject"/>s inside this <see cref="RulesetContainer{TPlayfield,TObject}"/> will scroll within the playfield.
+    /// </summary>
+    public abstract class ScrollingRulesetContainer<TPlayfield, TObject> : RulesetContainer<TPlayfield, TObject>
+        where TObject : HitObject
+        where TPlayfield : ScrollingPlayfield
+    {
+        /// <summary>
+        /// Provides the default <see cref="MultiplierControlPoint"/>s that adjust the scrolling rate of <see cref="HitObject"/>s
+        /// inside this <see cref="RulesetContainer{TPlayfield,TObject}"/>.
+        /// </summary>
+        /// <returns></returns>
+        protected readonly SortedList<MultiplierControlPoint> DefaultControlPoints = new SortedList<MultiplierControlPoint>(Comparer<MultiplierControlPoint>.Default);
+
+        protected ScrollingRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap, bool isForCurrentRuleset)
+            : base(ruleset, beatmap, isForCurrentRuleset)
+        {
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            // Calculate default multiplier control points
+            var lastTimingPoint = new TimingControlPoint();
+            var lastDifficultyPoint = new DifficultyControlPoint();
+
+            // Merge timing + difficulty points
+            var allPoints = new SortedList<ControlPoint>(Comparer<ControlPoint>.Default);
+            allPoints.AddRange(Beatmap.ControlPointInfo.TimingPoints);
+            allPoints.AddRange(Beatmap.ControlPointInfo.DifficultyPoints);
+
+            // Generate the timing points, making non-timing changes use the previous timing change
+            var timingChanges = allPoints.Select(c =>
+            {
+                var timingPoint = c as TimingControlPoint;
+                var difficultyPoint = c as DifficultyControlPoint;
+
+                if (timingPoint != null)
+                    lastTimingPoint = timingPoint;
+
+                if (difficultyPoint != null)
+                    lastDifficultyPoint = difficultyPoint;
+
+                return new MultiplierControlPoint(c.Time)
+                {
+                    TimingPoint = lastTimingPoint,
+                    DifficultyPoint = lastDifficultyPoint
+                };
+            });
+
+            double lastObjectTime = (Objects.LastOrDefault() as IHasEndTime)?.EndTime ?? Objects.LastOrDefault()?.StartTime ?? double.MaxValue;
+
+            // Perform some post processing of the timing changes
+            timingChanges = timingChanges
+                // Collapse sections after the last hit object
+                .Where(s => s.StartTime <= lastObjectTime)
+                // Collapse sections with the same start time
+                .GroupBy(s => s.StartTime).Select(g => g.Last()).OrderBy(s => s.StartTime)
+                // Collapse sections with the same beat length
+                .GroupBy(s => s.TimingPoint.BeatLength * s.DifficultyPoint.SpeedMultiplier).Select(g => g.First());
+
+            DefaultControlPoints.AddRange(timingChanges);
+
+            // If we have no control points, add a default one
+            if (DefaultControlPoints.Count == 0)
+                DefaultControlPoints.Add(new MultiplierControlPoint());
+
+            DefaultControlPoints.ForEach(c => applySpeedAdjustment(c, Playfield));
+        }
+
+        private void applySpeedAdjustment(MultiplierControlPoint controlPoint, ScrollingPlayfield playfield)
+        {
+            playfield.HitObjects.ControlPoints.Add(controlPoint);
+            playfield.NestedPlayfields.ForEach(p => applySpeedAdjustment(controlPoint, p));
+        }
+
+        /// <summary>
+        /// Generates a <see cref="MultiplierControlPoint"/> with the default timing change/difficulty change from the beatmap at a time.
+        /// </summary>
+        /// <param name="time">The time to create the control point at.</param>
+        /// <returns>The default <see cref="MultiplierControlPoint"/> at <paramref name="time"/>.</returns>
+        public MultiplierControlPoint CreateControlPointAt(double time)
+        {
+            if (DefaultControlPoints.Count == 0)
+                return new MultiplierControlPoint(time);
+
+            int index = DefaultControlPoints.BinarySearch(new MultiplierControlPoint(time));
+            if (index < 0)
+                return new MultiplierControlPoint(time);
+
+            return new MultiplierControlPoint(time, DefaultControlPoints[index].DeepClone());
+        }
+    }
+}