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//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
// Copyright (c) 2024 Alexander Grund
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/locale/encoding.hpp>
#include <boost/locale/generator.hpp>
#include <boost/locale/localization_backend.hpp>
#include <boost/thread/locks.hpp>
#include <boost/thread/mutex.hpp>
#include <algorithm>
#include <map>
#include <vector>
namespace boost { namespace locale {
struct generator::data {
data(const localization_backend_manager& mgr) :
cats(all_categories), chars(all_characters), caching_enabled(false), use_ansi_encoding(false),
backend_manager(mgr)
{}
mutable std::map<std::string, std::locale> cached;
mutable boost::mutex cached_lock;
category_t cats;
char_facet_t chars;
bool caching_enabled;
bool use_ansi_encoding;
std::vector<std::string> paths;
std::vector<std::string> domains;
std::map<std::string, std::vector<std::string>> options;
localization_backend_manager backend_manager;
};
generator::generator(const localization_backend_manager& mgr) : d(new generator::data(mgr)) {}
generator::generator() : d(new generator::data(localization_backend_manager::global())) {}
generator::~generator() = default;
category_t generator::categories() const
{
return d->cats;
}
void generator::categories(category_t t)
{
d->cats = t;
}
void generator::characters(char_facet_t t)
{
d->chars = t;
}
char_facet_t generator::characters() const
{
return d->chars;
}
void generator::add_messages_domain(const std::string& domain)
{
if(std::find(d->domains.begin(), d->domains.end(), domain) == d->domains.end())
d->domains.push_back(domain);
}
void generator::set_default_messages_domain(const std::string& domain)
{
const auto p = std::find(d->domains.begin(), d->domains.end(), domain);
if(p != d->domains.end())
d->domains.erase(p);
d->domains.insert(d->domains.begin(), domain);
}
void generator::clear_domains()
{
d->domains.clear();
}
void generator::add_messages_path(const std::string& path)
{
d->paths.push_back(path);
}
void generator::clear_paths()
{
d->paths.clear();
}
void generator::clear_cache()
{
d->cached.clear();
}
std::locale generator::generate(const std::string& id) const
{
return generate(std::locale::classic(), id);
}
std::locale generator::generate(const std::locale& base, const std::string& id) const
{
if(d->caching_enabled) {
boost::unique_lock<boost::mutex> guard(d->cached_lock);
const auto p = d->cached.find(id);
if(p != d->cached.end())
return p->second;
}
auto backend = d->backend_manager.create();
set_all_options(*backend, id);
std::locale result = base;
const category_t facets = d->cats;
const char_facet_t chars = d->chars;
for(category_t facet = per_character_facet_first; facet <= per_character_facet_last; ++facet) {
if(!(facets & facet))
continue;
for(char_facet_t ch = character_facet_first; ch <= character_facet_last; ++ch) {
if(ch & chars)
result = backend->install(result, facet, ch);
}
}
for(category_t facet = non_character_facet_first; facet <= non_character_facet_last; ++facet) {
if(facets & facet)
result = backend->install(result, facet, char_facet_t::nochar);
}
if(d->caching_enabled) {
boost::unique_lock<boost::mutex> guard(d->cached_lock);
const auto p = d->cached.find(id);
if(p == d->cached.end())
d->cached[id] = result;
}
return result;
}
bool generator::use_ansi_encoding() const
{
return d->use_ansi_encoding;
}
void generator::use_ansi_encoding(bool v)
{
d->use_ansi_encoding = v;
}
bool generator::locale_cache_enabled() const
{
return d->caching_enabled;
}
void generator::locale_cache_enabled(bool enabled)
{
d->caching_enabled = enabled;
}
void generator::set_all_options(localization_backend& backend, const std::string& id) const
{
backend.set_option("locale", id);
backend.set_option("use_ansi_encoding", d->use_ansi_encoding ? "true" : "false");
for(const std::string& domain : d->domains)
backend.set_option("message_application", domain);
for(const std::string& path : d->paths)
backend.set_option("message_path", path);
}
// Sanity check
static_assert((char_facet_t::char_f | char_facet_t::wchar_f) & char_facet_t::char_f, "!");
static_assert((char_facet_t::char_f | char_facet_t::wchar_f) & char_facet_t::wchar_f, "!");
static_assert(!((all_characters ^ char_facet_t::wchar_f) & char_facet_t::wchar_f), "!");
static_assert((category_t::calendar | category_t::convert) & category_t::calendar, "!");
static_assert((category_t::calendar | category_t::convert) & category_t::convert, "!");
static_assert(!((all_categories ^ category_t::calendar) & category_t::calendar), "!");
#ifndef BOOST_NO_CXX14_CONSTEXPR
template<typename T>
constexpr T inc_enum(T v)
{
return ++v;
}
static_assert(inc_enum(char_facet_t::nochar) == char_facet_t::char_f, "!");
static_assert(inc_enum(char_facet_t::char_f) == char_facet_t::wchar_f, "!");
static_assert(inc_enum(category_t::convert) == category_t::collation, "!");
#endif
}} // namespace boost::locale
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