Mode -> Ruleset.

osu.Game/Rulesets/UI/HitRenderer.cs

@@ -0,0 +1,283 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Screens.Play;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using osu.Game.Rulesets.Replays;
+using osu.Game.Rulesets.Scoring;
+using OpenTK;
+using osu.Game.Rulesets.Beatmaps;
+
+namespace osu.Game.Rulesets.UI
+{
+    /// <summary>
+    /// Base HitRenderer. Doesn't hold objects.
+    /// <para>
+    /// Should not be derived - derive <see cref="HitRenderer{TObject, TJudgement}"/> instead.
+    /// </para>
+    /// </summary>
+    public abstract class HitRenderer : Container
+    {
+        /// <summary>
+        /// Invoked when all the judgeable HitObjects have been judged.
+        /// </summary>
+        public event Action OnAllJudged;
+
+        /// <summary>
+        /// Whether to apply adjustments to the child <see cref="Playfield{TObject,TJudgement}"/> based on our own size.
+        /// </summary>
+        public bool AspectAdjust = true;
+
+        /// <summary>
+        /// The input manager for this HitRenderer.
+        /// </summary>
+        internal readonly PlayerInputManager InputManager = new PlayerInputManager();
+
+        /// <summary>
+        /// The key conversion input manager for this HitRenderer.
+        /// </summary>
+        protected readonly KeyConversionInputManager KeyConversionInputManager;
+
+        /// <summary>
+        /// Whether we are currently providing the local user a gameplay cursor.
+        /// </summary>
+        public virtual bool ProvidingUserCursor => false;
+
+        /// <summary>
+        /// Whether we have a replay loaded currently.
+        /// </summary>
+        public bool HasReplayLoaded => InputManager.ReplayInputHandler != null;
+
+        public abstract IEnumerable<HitObject> Objects { get; }
+
+        /// <summary>
+        /// Whether all the HitObjects have been judged.
+        /// </summary>
+        protected abstract bool AllObjectsJudged { get; }
+
+        protected HitRenderer()
+        {
+            KeyConversionInputManager = CreateKeyConversionInputManager();
+            KeyConversionInputManager.RelativeSizeAxes = Axes.Both;
+        }
+
+        /// <summary>
+        /// Checks whether all HitObjects have been judged, and invokes OnAllJudged.
+        /// </summary>
+        protected void CheckAllJudged()
+        {
+            if (AllObjectsJudged)
+                OnAllJudged?.Invoke();
+        }
+
+        public abstract ScoreProcessor CreateScoreProcessor();
+
+        /// <summary>
+        /// Creates a key conversion input manager.
+        /// </summary>
+        /// <returns>The input manager.</returns>
+        protected virtual KeyConversionInputManager CreateKeyConversionInputManager() => new KeyConversionInputManager();
+
+        protected virtual FramedReplayInputHandler CreateReplayInputHandler(Replay replay) => new FramedReplayInputHandler(replay);
+
+        /// <summary>
+        /// Sets a replay to be used, overriding local input.
+        /// </summary>
+        /// <param name="replay">The replay, null for local input.</param>
+        public void SetReplay(Replay replay) => InputManager.ReplayInputHandler = replay != null ? CreateReplayInputHandler(replay) : null;
+    }
+
+    /// <summary>
+    /// HitRenderer that applies conversion to Beatmaps. Does not contain a Playfield
+    /// and does not load drawable hit objects.
+    /// <para>
+    /// Should not be derived - derive <see cref="HitRenderer{TObject, TJudgement}"/> instead.
+    /// </para>
+    /// </summary>
+    /// <typeparam name="TObject">The type of HitObject contained by this HitRenderer.</typeparam>
+    public abstract class HitRenderer<TObject> : HitRenderer
+        where TObject : HitObject
+    {
+        /// <summary>
+        /// The Beatmap 
+        /// </summary>
+        public Beatmap<TObject> Beatmap;
+
+        protected HitRenderer(WorkingBeatmap beatmap)
+        {
+            Debug.Assert(beatmap != null, "HitRenderer initialized with a null beatmap.");
+
+            RelativeSizeAxes = Axes.Both;
+
+            BeatmapConverter<TObject> converter = CreateBeatmapConverter();
+            BeatmapProcessor<TObject> processor = CreateBeatmapProcessor();
+
+            // Check if the beatmap can be converted
+            if (!converter.CanConvert(beatmap.Beatmap))
+                throw new BeatmapInvalidForModeException($"{nameof(Beatmap)} can't be converted for the current ruleset.");
+
+            // Convert the beatmap
+            Beatmap = converter.Convert(beatmap.Beatmap);
+
+            // Apply defaults
+            foreach (var h in Beatmap.HitObjects)
+                h.ApplyDefaults(Beatmap.TimingInfo, Beatmap.BeatmapInfo.Difficulty);
+
+            // Post-process the beatmap
+            processor.PostProcess(Beatmap);
+
+            // Add mods, should always be the last thing applied to give full control to mods
+            applyMods(beatmap.Mods.Value);
+        }
+
+        /// <summary>
+        /// Applies the active mods to this HitRenderer.
+        /// </summary>
+        /// <param name="mods"></param>
+        private void applyMods(IEnumerable<Mod> mods)
+        {
+            if (mods == null)
+                return;
+
+            foreach (var mod in mods.OfType<IApplicableMod<TObject>>())
+                mod.Apply(this);
+        }
+
+        /// <summary>
+        /// Creates a processor to perform post-processing operations
+        /// on HitObjects in converted Beatmaps.
+        /// </summary>
+        /// <returns>The Beatmap processor.</returns>
+        protected virtual BeatmapProcessor<TObject> CreateBeatmapProcessor() => new BeatmapProcessor<TObject>();
+
+        /// <summary>
+        /// Creates a converter to convert Beatmap to a specific mode.
+        /// </summary>
+        /// <returns>The Beatmap converter.</returns>
+        protected abstract BeatmapConverter<TObject> CreateBeatmapConverter();
+    }
+
+    /// <summary>
+    /// A derivable HitRenderer that manages the Playfield and HitObjects.
+    /// </summary>
+    /// <typeparam name="TObject">The type of HitObject contained by this HitRenderer.</typeparam>
+    /// <typeparam name="TJudgement">The type of Judgement of DrawableHitObjects contained by this HitRenderer.</typeparam>
+    public abstract class HitRenderer<TObject, TJudgement> : HitRenderer<TObject>
+        where TObject : HitObject
+        where TJudgement : Judgement
+    {
+        public event Action<TJudgement> OnJudgement;
+
+        public sealed override bool ProvidingUserCursor => !HasReplayLoaded && Playfield.ProvidingUserCursor;
+
+        protected override Container<Drawable> Content => content;
+        protected override bool AllObjectsJudged => Playfield.HitObjects.Children.All(h => h.Judgement.Result != HitResult.None);
+
+        /// <summary>
+        /// The playfield.
+        /// </summary>
+        protected Playfield<TObject, TJudgement> Playfield;
+
+        private readonly Container content;
+
+        public override IEnumerable<HitObject> Objects => Beatmap.HitObjects;
+
+        protected HitRenderer(WorkingBeatmap beatmap)
+            : base(beatmap)
+        {
+            KeyConversionInputManager.Add(Playfield = CreatePlayfield());
+
+            InputManager.Add(content = new Container
+            {
+                RelativeSizeAxes = Axes.Both,
+                Children = new[] { KeyConversionInputManager }
+            });
+
+            AddInternal(InputManager);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            loadObjects();
+
+            if (InputManager?.ReplayInputHandler != null)
+                InputManager.ReplayInputHandler.ToScreenSpace = Playfield.ScaledContent.ToScreenSpace;
+        }
+
+        private void loadObjects()
+        {
+            foreach (TObject h in Beatmap.HitObjects)
+            {
+                var drawableObject = GetVisualRepresentation(h);
+
+                if (drawableObject == null)
+                    continue;
+
+                drawableObject.OnJudgement += onJudgement;
+
+                Playfield.Add(drawableObject);
+            }
+
+            Playfield.PostProcess();
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Playfield.Size = AspectAdjust ? GetPlayfieldAspectAdjust() : Vector2.One;
+        }
+
+        /// <summary>
+        /// In some cases we want to apply changes to the relative size of our contained <see cref="Playfield{TObject, TJudgement}"/> based on custom conditions.
+        /// </summary>
+        /// <returns></returns>
+        protected virtual Vector2 GetPlayfieldAspectAdjust() => new Vector2(0.75f); //a sane default
+
+        /// <summary>
+        /// Triggered when an object's Judgement is updated.
+        /// </summary>
+        /// <param name="judgedObject">The object that Judgement has been updated for.</param>
+        private void onJudgement(DrawableHitObject<TObject, TJudgement> judgedObject)
+        {
+            Playfield.OnJudgement(judgedObject);
+
+            OnJudgement?.Invoke(judgedObject.Judgement);
+
+            CheckAllJudged();
+        }
+
+        /// <summary>
+        /// Creates a DrawableHitObject from a HitObject.
+        /// </summary>
+        /// <param name="h">The HitObject to make drawable.</param>
+        /// <returns>The DrawableHitObject.</returns>
+        protected abstract DrawableHitObject<TObject, TJudgement> GetVisualRepresentation(TObject h);
+
+        /// <summary>
+        /// Creates a Playfield.
+        /// </summary>
+        /// <returns>The Playfield.</returns>
+        protected abstract Playfield<TObject, TJudgement> CreatePlayfield();
+    }
+
+    public class BeatmapInvalidForModeException : Exception
+    {
+        public BeatmapInvalidForModeException(string text)
+            : base(text)
+        {
+        }
+    }
+}