Port Mini Heart Door Unfix Controller from FLCC

Ahorn/entities/maxHelpingHandMiniHeartDoorUnfixController.jl

@@ -0,0 +1,21 @@
+module MaxHelpingHandMiniHeartDoorUnfixController
+
+using ..Ahorn, Maple
+
+@mapdef Entity "MaxHelpingHand/MiniHeartDoorUnfixController" MiniHeartDoorUnfixController(x::Integer, y::Integer)
+
+const placements = Ahorn.PlacementDict(
+    "Mini Heart Door Unfix Controller (Maddie's Helping Hand)" => Ahorn.EntityPlacement(
+        MiniHeartDoorUnfixController
+    )
+)
+
+function Ahorn.selection(entity::MiniHeartDoorUnfixController)
+    x, y = Ahorn.position(entity)
+
+    return Ahorn.Rectangle(x - 12, y - 12, 24, 24)
+end
+
+Ahorn.render(ctx::Ahorn.Cairo.CairoContext, entity::MiniHeartDoorUnfixController, room::Maple.Room) = Ahorn.drawImage(ctx, "ahorn/miniheartdoorunfix", -12, -12)
+
+end

Entities/MiniHeartDoorUnfixController.cs

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+using Celeste;
+using Celeste.Mod.Entities;
+using Microsoft.Xna.Framework;
+using Mono.Cecil.Cil;
+using Monocle;
+using MonoMod.Cil;
+using MonoMod.RuntimeDetour;
+
+namespace Celeste.Mod.MaxHelpingHand.Entities {
+    // This controller reverts this fix, and was made to fix a map from Etpio in FLCC: https://github.com/EverestAPI/CelesteCollabUtils2/pull/60
+    [CustomEntity("MaxHelpingHand/MiniHeartDoorUnfixController")]
+    [Tracked]
+    class MiniHeartDoorUnfixController : Entity {
+        private static ILHook miniHeartDoorHook = null;
+
+        public static void Initialize() {
+            if (miniHeartDoorHook != null) return;
+
+            Type miniHeartDoorClass = Everest.Modules.FirstOrDefault(module => module.GetType().ToString() == "Celeste.Mod.CollabUtils2.CollabModule")?.GetType().Assembly
+                .GetType("Celeste.Mod.CollabUtils2.Entities.MiniHeartDoor");
+
+            if (miniHeartDoorClass != null) {
+                miniHeartDoorHook = new ILHook(miniHeartDoorClass.GetMethod("Update"), modMiniHeartDoorUpdate);
+            }
+        }
+
+        public static void Unload() {
+            miniHeartDoorHook?.Dispose();
+            miniHeartDoorHook = null;
+        }
+
+        private static void modMiniHeartDoorUpdate(ILContext il) {
+            ILCursor cursor = new ILCursor(il);
+
+            while(cursor.TryGotoNext(MoveType.After, instr => instr.MatchCall<HeartGemDoor>("get_Opened"))) {
+                cursor.Emit(OpCodes.Ldarg_0);
+                cursor.EmitDelegate<Func<bool, HeartGemDoor, bool>>((orig, self) => {
+                    if (self.Scene.Tracker.CountEntities<MiniHeartDoorUnfixController>() > 0) {
+                        // this condition wasn't here before the fix, so we want to make it true!
+                        return true;
+                    }
+
+                    return orig;
+                });
+            }
+        }
+
+        public MiniHeartDoorUnfixController(EntityData data, Vector2 offset) : base(data.Position + offset) { }
+    }
+}