Method OnAsyncSuspend

src/scene_map.cpp:397–475

template <typename F>
void Scene_Map::OnAsyncSuspend(F&& f, AsyncOp aop, bool is_preupdate) {
	if (CheckSceneExit(aop)) {
		return;
	}

	if (aop.GetType() == AsyncOp::eSave) {
		auto savefs = FileFinder::Save();
		bool success = Scene_Save::Save(savefs, aop.GetSaveSlot());
		if (aop.GetSaveResultVar() > 0) {
			Main_Data::game_variables->Set(aop.GetSaveResultVar(), success ? 1 : 0);
			Game_Map::SetNeedRefresh(true);
		}
	}

	if (aop.GetType() == AsyncOp::eLoad) {
		auto savefs = FileFinder::Save();
		std::string save_name = Scene_Save::GetSaveFilename(savefs, aop.GetSaveSlot());
		Player::LoadSavegame(save_name, aop.GetSaveSlot());
	}

	if (aop.GetType() == AsyncOp::eCloneMapEvent) {
		Game_Map::CloneMapEvent(aop.GetMapId(), aop.GetSourceEventId(), aop.GetX(), aop.GetY(), aop.GetTargetEventId(), aop.GetEventName());
	}

	if (aop.GetType() == AsyncOp::eDestroyMapEvent) {
		Game_Map::DestroyMapEvent(aop.GetTargetEventId());
	}

	auto& transition = Transition::instance();

	if (aop.GetType() == AsyncOp::eEraseScreen) {
		auto tt = static_cast<Transition::Type>(aop.GetTransitionType());
		if (tt == Transition::TransitionNone) {
			// Emulates an RPG_RT bug where instantaneous transitions cause a
			// 30 frame pause and then make the screen black.
			transition.InitErase(Transition::TransitionCutOut, this, 30);
		} else {
			transition.InitErase(tt, this);
		}

		if (!is_preupdate) {
			// RPG_RT behavior: EraseScreen commands performed during pre-update don't stick.
			screen_erased_by_event = true;
		}
	}

	if (aop.GetType() == AsyncOp::eShowScreen) {
		auto tt = static_cast<Transition::Type>(aop.GetTransitionType());
		transition.InitShow(tt, this);
		screen_erased_by_event = false;
	}

	if (aop.GetType() == AsyncOp::eCallInn) {
		activate_inn = true;
		inn_started = false;
		music_before_inn = Main_Data::game_system->GetCurrentBGM();
		map_async_continuation = std::forward<F>(f);