lua: uidocuments sub-environment

src/logic/scripting/LuaState.cpp

@@ -228,7 +228,7 @@ const std::string lua::LuaState::storeAnonymous() {
     return funcName;
 }
 
-int lua::LuaState::createEnvironment() {
+int lua::LuaState::createEnvironment(int parent) {
     int id = nextEnvironment++;
 
     // local env = {}
@@ -236,7 +236,13 @@ int lua::LuaState::createEnvironment() {
     
     // setmetatable(env, {__index=_G})
     lua_createtable(L, 0, 1);
-    lua_pushvalue(L, LUA_GLOBALSINDEX);
+    if (parent == 0 || true) {
+        lua_pushvalue(L, LUA_GLOBALSINDEX);
+    } else {
+        if (pushenv(parent) == 0) {
+            lua_pushvalue(L, LUA_GLOBALSINDEX);
+        }
+    }
     lua_setfield(L, -2, "__index");
     lua_setmetatable(L, -2);
 

src/logic/scripting/LuaState.h

@@ -51,7 +51,7 @@ namespace lua {
         bool rename(const std::string& from, const std::string& to);
         void remove(const std::string& name);;
         void createFuncs();
-        int createEnvironment();
+        int createEnvironment(int parent);
         void removeEnvironment(int id);
         const std::string storeAnonymous();
     };

src/logic/scripting/scripting.cpp

@@ -91,8 +91,8 @@ wstringconsumer scripting::create_wstring_consumer(
     };
 }
 
-std::unique_ptr<Environment> scripting::create_environment() {
-    return std::make_unique<Environment>(state->createEnvironment());
+std::unique_ptr<Environment> scripting::create_environment(int parent) {
+    return std::make_unique<Environment>(state->createEnvironment(parent));
 }
 
 void scripting::on_world_load(Level* level, BlocksController* blocks) {

src/logic/scripting/scripting.h

@@ -51,7 +51,7 @@ namespace scripting {
         const std::string& file="<string>"
     );
 
-    std::unique_ptr<Environment> create_environment();
+    std::unique_ptr<Environment> create_environment(int parent=0);
 
     void on_world_load(Level* level, BlocksController* blocks);
     void on_world_save();