From 896f11fd97e4fdc52d2bdff9d382a7801bace0e1 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Sat, 31 Oct 2026 16:34:29 +0000
Subject: [PATCH] Decompile fn_13274 (UIItemStoreWnd::Slot10)

Batch #8310 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_13274 UIItemStoreWnd::Slot10: logic confirmed by peer review

Peer-reviewed-by: Yommy, gordaoprogramas, dori
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Client/Mode/CGameMode.h  |  3 +++
 Source/UI/Edit/UIEditCtrl.cpp   | 45 +++++++++++++++++++++++++++++++++
 Source/UI/Item/UIItemStoreWnd.h |  1 +
 3 files changed, 49 insertions(+)

diff --git a/Source/Client/Mode/CGameMode.h b/Source/Client/Mode/CGameMode.h
index a88fa651..8d0b8780 100644
--- a/Source/Client/Mode/CGameMode.h
+++ b/Source/Client/Mode/CGameMode.h
@@ -649,5 +649,8 @@ static_assert(sizeof(CGameMode) == 0x670);
 extern char g_pendingWhisperCount;
 extern int g_whisperRecord;
 extern unsigned char g_gameModePacketBuffer[0x10000];
+extern int g_unknown_01738268;
+extern int g_unknown_0173826C;
+extern int g_unknown_01738270;
 
 #endif
diff --git a/Source/UI/Edit/UIEditCtrl.cpp b/Source/UI/Edit/UIEditCtrl.cpp
index 98b7d447..d844150b 100644
--- a/Source/UI/Edit/UIEditCtrl.cpp
+++ b/Source/UI/Edit/UIEditCtrl.cpp
@@ -1074,6 +1074,51 @@ void UIItemStoreSubWnd::Slot10(int x, int y, std::intptr_t value) {
   g_windowMgr.window_01EC->SendMsg(nullptr, 13, 7, 0, 0, 0);
 }
 
+// OFFSET: 0x00972630
+// FUNCTION: fn_13274
+void UIItemStoreWnd::Slot10(int x, int y, std::intptr_t value) {
+  char text[256];
+  if (g_unknown_01738268) {
+    if (g_unknown_01738270 == 1) {
+      std::memset(text, 0, 250);
+      std::sprintf(text, LookupMessage(0x9C2));
+      g_windowMgr.SendNotice(1, reinterpret_cast<std::intptr_t>(text), 0xFF, 0, 0, 0);
+      return;
+    }
+
+    if (!g_unknown_0173826C && !g_unknown_01738270) {
+      std::memset(text, 0, 250);
+      std::sprintf(text, LookupMessage(0x9C5));
+      g_windowMgr.SendNotice(1, reinterpret_cast<std::intptr_t>(text), 0xFF, 0, 0, 0);
+      return;
+    }
+  }
+
+  if (g_windowMgr.LookupWindow(10011)) {
+    UIWindow::Slot10(x, y, value);
+    return;
+  }
+
+  CMode* mode = g_modeMgr.GetGameMode();
+  const ModeDragState* drag = reinterpret_cast<const ModeDragState*>(value);
+  if (drag->source != 1 && drag->source != 9) {
+    mode->SendMsg(18, 0, 0, 0, 0);
+    return;
+  }
+
+  if (static_cast<CGameMode*>(mode)->ConfirmDraggedItemUse()) {
+    return;
+  }
+
+  if (drag->quantity == 1) {
+    this->SendMsg(nullptr, 38, 0, 0, 0, 0);
+    return;
+  }
+
+  reinterpret_cast<WindowVisibility&>(g_windowMgr).Show(15, 1);
+  g_windowMgr.window_01EC->SendMsg(nullptr, 13, 7, 0, 0, 0);
+}
+
 // OFFSET: 0x009727F0
 // FUNCTION: fn_13275
 void UIItemWnd::Slot10(int x, int y, std::intptr_t value) {
diff --git a/Source/UI/Item/UIItemStoreWnd.h b/Source/UI/Item/UIItemStoreWnd.h
index 0a31154f..8d318341 100644
--- a/Source/UI/Item/UIItemStoreWnd.h
+++ b/Source/UI/Item/UIItemStoreWnd.h
@@ -12,6 +12,7 @@ class UIStaticText;
 
 class UIItemStoreWnd : public UIItemBaseWnd {
 public:
+  void Slot10(int x, int y, std::intptr_t value) override;
   void Slot28(int x, int y) override;
   void Slot32(int x, int y) override;
   void Slot11() override;