From 4011a566e7b2e28ea2c97521ac3fb59a2831ad6e Mon Sep 17 00:00:00 2001
From: cnjhb <hikariz@qq.com>
Date: Mon, 25 Aug 2025 21:21:57 +0800
Subject: [PATCH 1/2] fix(obj): compatible with lua 5.1

---
 src/obj.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/obj.c b/src/obj.c
index 621d975..2f39815 100644
--- a/src/obj.c
+++ b/src/obj.c
@@ -1,3 +1,4 @@
+#include "lua.h"
 #include "luavgl.h"
 #include "private.h"
 
@@ -22,8 +23,13 @@ static void obj_delete_cb(lv_event_t *e)
     goto pop_exit;
   }
 
+#if (LUA_VERSION_NUM >= 502)
   lua_pushnil(L);
   lua_setuservalue(L, -2);
+#else
+  lua_getglobal(L, "_G");
+  lua_setuservalue(L, -2);
+#endif
 
   luavgl_obj_t *lobj = luavgl_to_lobj(L, -1);
   if (lobj->lua_created)
@@ -860,6 +866,7 @@ static int obj_property_h(lua_State *L, lv_obj_t *obj, bool set)
 
 static int obj_property_user_data(lua_State *L, lv_obj_t *obj, bool set)
 {
+#if (LUA_VERSION_NUM >= 502)
   if (set) {
     lua_pushvalue(L, -1);
     lua_setuservalue(L, 1);
@@ -867,6 +874,17 @@ static int obj_property_user_data(lua_State *L, lv_obj_t *obj, bool set)
     lua_getuservalue(L, 1);
   }
   return 1;
+#else
+  if (set) {
+    lua_getuservalue(L, 1);
+    lua_pushvalue(L, -1);
+    lua_rawseti(L, -2, 1);
+  } else {
+    lua_getuservalue(L, 1);
+    lua_rawgeti(L, -1, 1);
+  }
+  return 1;
+#endif
 }
 
 static const luavgl_property_ops_t obj_property_ops[] = {
@@ -1155,6 +1173,13 @@ LUALIB_API luavgl_obj_t *luavgl_add_lobj(lua_State *L, lv_obj_t *obj)
   lua_pushvalue(L, -2);
   lua_rawset(L, LUA_REGISTRYINDEX);
 
+#if (LUA_VERSION_NUM == 501)
+  lua_pushlightuserdata(L, obj);
+  lua_rawget(L, LUA_REGISTRYINDEX);
+  lua_newtable(L);
+  lua_setuservalue(L, -2);
+#endif
+
   LV_LOG_INFO("add obj: %p to lua, lobj: %p", obj, lua_touserdata(L, -1));
   return lobj;
 }

From e84f365069aacb42c34d6821f41f4e510db3027a Mon Sep 17 00:00:00 2001
From: cnjhb <hikariz@qq.com>
Date: Tue, 26 Aug 2025 09:56:45 +0800
Subject: [PATCH 2/2] fix something

---
 src/obj.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/obj.c b/src/obj.c
index 2f39815..c50749f 100644
--- a/src/obj.c
+++ b/src/obj.c
@@ -1,4 +1,3 @@
-#include "lua.h"
 #include "luavgl.h"
 #include "private.h"
 
@@ -27,7 +26,7 @@ static void obj_delete_cb(lv_event_t *e)
   lua_pushnil(L);
   lua_setuservalue(L, -2);
 #else
-  lua_getglobal(L, "_G");
+  lua_pushglobaltable(L);
   lua_setuservalue(L, -2);
 #endif
 
@@ -1174,8 +1173,6 @@ LUALIB_API luavgl_obj_t *luavgl_add_lobj(lua_State *L, lv_obj_t *obj)
   lua_rawset(L, LUA_REGISTRYINDEX);
 
 #if (LUA_VERSION_NUM == 501)
-  lua_pushlightuserdata(L, obj);
-  lua_rawget(L, LUA_REGISTRYINDEX);
   lua_newtable(L);
   lua_setuservalue(L, -2);
 #endif