From c173b2a2302f56fd31adf59327d9e62c0adadd6f Mon Sep 17 00:00:00 2001
From: Minepig <30530115+Minepig@users.noreply.github.com>
Date: Fri, 4 Oct 2024 13:41:48 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E8=BF=9E=E9=94=81Slide?=
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---
 AquaMai/Fix/FixConnSlide.cs | 64 +++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 AquaMai/Fix/FixConnSlide.cs

diff --git a/AquaMai/Fix/FixConnSlide.cs b/AquaMai/Fix/FixConnSlide.cs
new file mode 100644
index 00000000..138716ad
--- /dev/null
+++ b/AquaMai/Fix/FixConnSlide.cs
@@ -0,0 +1,64 @@
+using System.Collections.Generic;
+using System.Reflection;
+using HarmonyLib;
+using Manager;
+using MelonLoader;
+using Monitor;
+
+namespace AquaMai.Fix;
+
+public class FixConnSlide
+{
+    /* 这个 Patch 用于修复以下 bug:
+     *     非 ConnSlide 被错误解析为 ConnSlide (Fes 首日刹那旅程爆机 bug)
+     * 原 method 逻辑如下:
+     * 
+     *     if (this.IsSlideAll(noteData1.type) && (index1 + 1 < this._note._noteData.Count ? 1 : 0) != 0)
+     *     {
+     *         int targetNote = noteData1.slideData.targetNote;
+     *         if (noteData1.slideData != null)
+     *             targetNote = noteData1.slideData.targetNote;
+     *         for (int index3 = index1; index3 < this._note._noteData.Count; ++index3)
+     *         {
+     *             NoteData noteData3 = this._note._noteData[index3];
+     *             if (this.IsSlideAll(noteData3.type) && noteData3.time == noteData1.end && noteData3.startButtonPos == targetNote && noteData3.parent == null)
+     *             {
+     *                 noteData3.parent = noteData1.parent;
+     *                 noteData1.child.Add(noteData3);
+     *                 noteData3.isUsed = true;
+     *                 noteData3.isJudged = true;
+     *                 break;
+     *             }
+     *         }
+     *     }
+     * 
+     * 修复 bug 需要把第二次调用 this.IsSlideAll() 更改为 this.IsConnectNote(), 这里使用 Transpiler 解决
+     */
+    [HarmonyTranspiler]
+    [HarmonyPatch(typeof(NotesReader), "calcSlide")]
+    private static IEnumerable<CodeInstruction> Fix(IEnumerable<CodeInstruction> instructions)
+    {
+        List<CodeInstruction> instList = new List<CodeInstruction>(instructions);
+        bool found = false;
+        MethodInfo methodIsSlideAll = AccessTools.Method(typeof(NotesReader), "IsSlideAll");
+        MethodInfo methodIsConnectNote = AccessTools.Method(typeof(NotesReader), "IsConnectNote");
+        
+        for (int i = 0; i < instList.Count; i++)
+        {
+            CodeInstruction inst = instList[i];
+            if (!found && inst.Calls(methodIsSlideAll))
+            {
+                found = true;
+                continue;
+            }
+
+            if (found && inst.Calls(methodIsSlideAll))
+            {
+                inst.operand = methodIsConnectNote;
+                // MelonLogger.Msg($"[FixConnSlide] Successfully patched NotesReader::calcSlide");
+                break;
+            }
+        }
+        return instList;
+    }
+}
\ No newline at end of file