ADOFAIRenderer/Patch/Game/scnEditorPatch.cs

using ADOFAIRenderer.Core;
using HarmonyLib;
using UnityEngine;
using UnityEngine.UI;

namespace ADOFAIRenderer.Patch.Game
{
    [HarmonyPatch(typeof(scnEditor))]
    // ReSharper disable once InconsistentNaming
    public static class scnEditorPatch
    {
        [HarmonyPostfix]
        [HarmonyPatch("Start")]
        // ReSharper disable once InconsistentNaming
        public static void AddButtonRender(scnEditor __instance)
        {
            if (RenderMod.IsFeatureDisabled) return;

            // 장식용 UI 주입이므로 실패해도 scnEditor.Start를 중단시키면 안 됩니다.
            if (!__instance || !__instance.buttonExit) return;

            var cloneTarget = __instance.buttonExit.gameObject;
            var buttonContainer = cloneTarget.transform.parent;
            if (buttonContainer == null) return;
            
            var buttonObj = Object.Instantiate(cloneTarget, buttonContainer)!;
            buttonObj.name = "buttonRender";
            
            var button = buttonObj.GetComponent<Button>()!;
            // Clear persistent and non-persistent listeners from the original button
            button.onClick = new Button.ButtonClickedEvent();
            button.onClick.AddListener(RenderManager.StartRender);
            
            // The button root has an Image component for the background (rounded box).
            // We want to change the icon sprite, which is on a child GameObject.
            var images = buttonObj.GetComponentsInChildren<Image>();
            if (images.Length <= 1) return;
            
            // ReSharper disable once Unity.UnknownResource
            // images[0] is the background on the root, images[1] is the icon on the child
            var sprite = Resources.Load<Sprite>("LevelEditor/LevelEvents/MoveCamera");
            if (sprite == null) return;
            
            var iconImage = images[1];
            iconImage.sprite = sprite;
            iconImage.rectTransform.sizeDelta = new Vector2(24, 24);
        }
    }
}