add app.is_content_loaded()

dev/tests/world.lua

@@ -5,6 +5,7 @@ app.reconfig_packs({"base"}, {})
 app.new_world("demo", "2019", "core:default")
 assert(world.is_open())
 assert(world.get_generator() == "core:default")
+assert(app.is_content_loaded())
 app.sleep(1)
 assert(world.get_total_time() > 0.0)
 print(world.get_total_time())
@@ -12,6 +13,7 @@ print(world.get_total_time())
 -- Close
 app.close_world(true)
 assert(not world.is_open())
+assert(not app.is_content_loaded())
 
 -- Reopen
 app.open_world("demo") 

doc/en/scripting/builtins/libapp.md

@@ -69,6 +69,12 @@ app.config_packs(
 Updates the packs configuration, automatically removing unspecified ones, adding those missing in the previous configuration.
 Uses app.reconfig_packs.
 
+```lua
+app.is_content_loaded() -> bool
+```
+
+Checks if content is loaded.
+
 ```lua
 app.new_world(
     -- world name

doc/ru/scripting/builtins/libapp.md

@@ -69,6 +69,12 @@ app.config_packs(
 Обновляет конфигурацию паков, автоматически удаляя лишние, добавляя отсутствующие в прошлой конфигурации.
 Использует app.reconfig_packs.
 
+```lua
+app.is_content_loaded() -> bool
+```
+
+Проверяет, загружен ли контент.
+
 ```lua
 app.new_world(
     -- название мира

res/scripts/stdlib.lua

@@ -39,6 +39,7 @@ local function complete_app_lib(app)
     app.get_setting_info = core.get_setting_info
     app.load_content = core.load_content
     app.reset_content = core.reset_content
+    app.is_content_loaded = core.is_content_loaded
     
     function app.config_packs(packs_list)
         -- Check if packs are valid and add dependencies to the configuration

src/logic/scripting/lua/libs/libcore.cpp

@@ -43,6 +43,10 @@ static int l_reset_content(lua::State* L) {
     return 0;
 }
 
+static int l_is_content_loaded(lua::State* L) {
+    return lua::pushboolean(L, content != nullptr);
+}
+
 /// @brief Creating new world
 /// @param name Name world
 /// @param seed Seed world
@@ -258,6 +262,7 @@ const luaL_Reg corelib[] = {
     {"get_version", lua::wrap<l_get_version>},
     {"load_content", lua::wrap<l_load_content>},
     {"reset_content", lua::wrap<l_reset_content>},
+    {"is_content_loaded", lua::wrap<l_is_content_loaded>},
     {"new_world", lua::wrap<l_new_world>},
     {"open_world", lua::wrap<l_open_world>},
     {"reopen_world", lua::wrap<l_reopen_world>},