Function PrepareLists

Telegram/SourceFiles/boxes/language_box.cpp:258–299

};

std::pair<Languages, Languages> PrepareLists() {
	const auto projId = [](const Language &language) {
		return language.id;
	};
	const auto current = Lang::LanguageIdOrDefault(Lang::Id());
	auto official = Lang::CurrentCloudManager().languageList();
	auto recent = Local::readRecentLanguages();
	ranges::stable_partition(recent, [&](const Language &language) {
		return (language.id == current);
	});
	if (recent.empty() || recent.front().id != current) {
		if (ranges::find(official, current, projId) == end(official)) {
			const auto generate = [&] {
				const auto name = (current == "#custom")
					? "Custom lang pack"
					: Lang::GetInstance().name();
				return Language{
					current,
					QString(),
					QString(),
					name,
					Lang::GetInstance().nativeName()
				};
			};
			recent.insert(begin(recent), generate());
		}
	}
	auto i = begin(official), e = end(official);
	const auto remover = [&](const Language &language) {
		auto k = ranges::find(i, e, language.id, projId);
		if (k == e) {
			return false;
		}
		for (; k != i; --k) {
			std::swap(*k, *(k - 1));
		}
		++i;
		return true;
	};
	recent.erase(ranges::remove_if(recent, remover), end(recent));
	return { std::move(recent), std::move(official) };
}

Rows::Rows(
	QWidget *parent,