From 1892d869215b5a525e734adc220a8e69b0672bf6 Mon Sep 17 00:00:00 2001
From: smoogipooo <smoogipooo@gmail.com>
Date: Fri, 17 Mar 2017 17:38:49 +0900
Subject: [PATCH] Add basic DrawableHitFinisher (no graphics yet, just input).

---
 .../Objects/Drawable/DrawableHitFinisher.cs   | 80 +++++++++++++++++++
 .../osu.Game.Modes.Taiko.csproj               |  1 +
 2 files changed, 81 insertions(+)
 create mode 100644 osu.Game.Modes.Taiko/Objects/Drawable/DrawableHitFinisher.cs

diff --git a/osu.Game.Modes.Taiko/Objects/Drawable/DrawableHitFinisher.cs b/osu.Game.Modes.Taiko/Objects/Drawable/DrawableHitFinisher.cs
new file mode 100644
index 0000000000..22fc83874b
--- /dev/null
+++ b/osu.Game.Modes.Taiko/Objects/Drawable/DrawableHitFinisher.cs
@@ -0,0 +1,80 @@
+using OpenTK.Input;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using osu.Framework.Input;
+
+namespace osu.Game.Modes.Taiko.Objects.Drawable
+{
+    public abstract class DrawableHitFinisher : DrawableHit
+    {
+        /// <summary>
+        /// The lenience for the second key press.
+        /// This does not adjust by map difficulty in ScoreV2 yet.
+        /// </summary>
+        private const double second_hit_window = 30;
+
+        private double firstHitTime;
+        private Key firstHitKey;
+
+        protected DrawableHitFinisher(TaikoHitObject hitObject)
+            : base(hitObject)
+        {
+        }
+
+        protected override void CheckJudgement(bool userTriggered)
+        {
+            if (!Judgement.Result.HasValue)
+            {
+                base.CheckJudgement(userTriggered);
+                return;
+            }
+
+            if (!userTriggered)
+                return;
+
+            // If we get here, we're assured that the key pressed is the correct secondary key
+
+            if (Math.Abs(firstHitTime - Time.Current) < second_hit_window)
+                Judgement.SecondHit = true;
+        }
+
+        protected override bool OnKeyDown(InputState state, KeyDownEventArgs args)
+        {
+            // Check if we've handled the initial key
+            if (!Judgement.Result.HasValue)
+            {
+                bool result = base.OnKeyDown(state, args);
+
+                if (result)
+                {
+                    firstHitTime = Time.Current;
+                    firstHitKey = args.Key;
+                }
+
+                return result;
+            }
+
+            // If we've already hit the second key, don't handle this object any further
+            if (Judgement.SecondHit)
+                return false;
+
+            // Don't handle represses of the same key
+            if (firstHitKey == args.Key)
+                return false;
+
+            // Don't handle invalid hit key presses
+            if (!HitKeys.Contains(args.Key))
+                return false;
+
+            // If we're not holding the first key down still, assume the intention
+            // was not to hit the finisher with both keys simultaneously
+            if (!state.Keyboard.Keys.Contains(firstHitKey))
+                return false;
+
+            return UpdateJudgement(true);
+        }
+    }
+}
diff --git a/osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj b/osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj
index 3a79d721c6..5b8a1fd2b8 100644
--- a/osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj
+++ b/osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj
@@ -52,6 +52,7 @@
     <Compile Include="Judgements\TaikoJudgementInfo.cs" />
     <Compile Include="Judgements\TaikoScoreResult.cs" />
     <Compile Include="Objects\Drawable\DrawableHit.cs" />
+    <Compile Include="Objects\Drawable\DrawableHitFinisher.cs" />
     <Compile Include="Objects\Drawable\DrawableTaikoHitObject.cs" />
     <Compile Include="Objects\TaikoHitType.cs" />
     <Compile Include="TaikoDifficultyCalculator.cs" />