From d2fab322d2706c1fe22be9f592ed48d46468f5ce Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Fri, 30 Oct 2026 23:46:30 +0000
Subject: [PATCH] Decompile fn_17201 (UIWindowMgr::HasTitleAtActorCell)

Batch #6220 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_17201 UIWindowMgr::HasTitleAtActorCell: logic confirmed by peer review

Peer-reviewed-by: ragnarok-clanker, alisonrag, System4z
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/UI/Chat/UIChatRoomTitle.h |  2 ++
 Source/UI/Window/FrameFocus.cpp  | 58 ++++++++++++++++++++++++++++++++
 Source/UI/Window/UIWindowMgr.h   |  1 +
 3 files changed, 61 insertions(+)

diff --git a/Source/UI/Chat/UIChatRoomTitle.h b/Source/UI/Chat/UIChatRoomTitle.h
index f02d8d14..9767dabd 100644
--- a/Source/UI/Chat/UIChatRoomTitle.h
+++ b/Source/UI/Chat/UIChatRoomTitle.h
@@ -9,6 +9,8 @@ class UIStaticText;
 struct UIButtonContext;
 
 class UIChatRoomTitle : public UIWindow {
+  friend class UIWindowMgr;
+
 public:
   explicit UIChatRoomTitle(UIWindowContext& context);
   void Slot15(int width, int height) override;
diff --git a/Source/UI/Window/FrameFocus.cpp b/Source/UI/Window/FrameFocus.cpp
index 57054241..5a163f9e 100644
--- a/Source/UI/Window/FrameFocus.cpp
+++ b/Source/UI/Window/FrameFocus.cpp
@@ -4,6 +4,14 @@
 #include "UI/Party/UIMiniPartyWnd.h"
 #include <algorithm>
 #include "Client/Session.h"
+#include "Client/Mode/CGameMode.h"
+#include "Client/Mode/ModeMgr.h"
+#include "Contents/Actors/RenderObject.h"
+#include "Contents/World/World.h"
+#include "Resource/World/TerrainResource.h"
+#include "UI/Chat/UIChatRoomTitle.h"
+#include "UI/Shop/UIMerchantShopTitle.h"
+#include <typeinfo>
 
 // STATIC: 0x014576A0
 // GLOBAL: gl_24367
@@ -146,6 +154,56 @@ bool UIWindowMgr::HasPendingDialog() {
          this->unknown_01F4;
 }
 
+// OFFSET: 0x00A97200
+// FUNCTION: fn_17201
+bool UIWindowMgr::HasTitleAtActorCell(std::uint32_t aid) {
+  CRenderObject* actor = static_cast<CGameMode*>(g_modeMgr.GetGameMode())->scene->GetGameActorByAidIncludeMe(aid);
+  if (actor == nullptr) {
+    return true;
+  }
+
+  int titleColumn = 0;
+  int titleRow = 0;
+  int actorColumn = 0;
+  int actorRow = 0;
+  CWorld* world = static_cast<CGameMode*>(g_modeMgr.GetGameMode())->scene;
+  world->terrain->Grid().SpatialCell(actor->render.position.x, actor->render.position.z, actorColumn, actorRow);
+  for (std::list<UIWindow*>::iterator it = this->rendered.begin(); it != this->rendered.end(); ++it) {
+    UIWindow* window = *it;
+    CRenderObject* owner;
+    if (typeid(*window) == typeid(UIMerchantShopTitle)) {
+      owner = g_session.FindGameActor(static_cast<UIMerchantShopTitle*>(window)->ownerAid);
+      if (owner == nullptr) {
+        return true;
+      }
+    } else if (typeid(*window) == typeid(UIChatRoomTitle)) {
+      const int roomId = static_cast<UIChatRoomTitle*>(window)->roomId;
+      if (roomId == 0) {
+        return true;
+      }
+
+      const std::uint32_t ownerAid = static_cast<CGameMode*>(g_modeMgr.GetGameMode())->FindUnknown01AC(roomId);
+      if (ownerAid == 0) {
+        return true;
+      }
+
+      owner = g_session.FindGameActor(ownerAid);
+      if (owner == nullptr) {
+        return true;
+      }
+    } else {
+      continue;
+    }
+
+    world->terrain->Grid().SpatialCell(owner->render.position.x, owner->render.position.z, titleColumn, titleRow);
+    if (titleColumn == actorColumn && titleRow == actorRow) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
 // OFFSET: 0x00A97490
 // FUNCTION: fn_17204
 void UIWindowMgr::CancelActiveDialog() {
diff --git a/Source/UI/Window/UIWindowMgr.h b/Source/UI/Window/UIWindowMgr.h
index e092c7bb..aef24c0f 100644
--- a/Source/UI/Window/UIWindowMgr.h
+++ b/Source/UI/Window/UIWindowMgr.h
@@ -519,6 +519,7 @@ public:
   bool IsSharedWindowId(int id);
   bool HasNavigationBlocker();
   bool HasPendingDialog();
+  bool HasTitleAtActorCell(std::uint32_t aid);
   void CancelActiveDialog();
   void CenterSurface0478();
   std::vector<unsigned char> SaveReplaySettings();