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This requires a std::locale generated from a boost::locale::generator The examples already in our code base used the wrong message_path while creating the generator and as a result our message catalogs weren't found. As with the std::locale I have added code to create a locale via boost::locale only once instead of having each c++ file redo the work. This code expects a message_path to set for the boost generator. An earlier attempt queried for this path directly from within gnc-locale-utils using gnc_get_locale_dir (from gnc-path.h). That however broke several c++ tests depending on gnc_locale_utils as those then also needed to be linked against gnc-path.o. I couldn't get the linker to do this properly so I worked around it for now by splitting the boost_locale functionality in two steps: - an initializer step that takes the messages_path as a string and will generate the locale - a getter to get the locale. The initializer should only be run once, and before the getter is called. It won't hurt though if the initializer is called more often. If the getter is called before the initializer it will still generate a std::locale but without setting a messages_path. It will then also log a warning explaining translations may not be properly found.
121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
/********************************************************************\
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* gnc-locale-utils.cpp -- provide a default locale for C++ *
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* Copyright (C) 2019 John Ralls <jralls@ceridwen.us *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, contact: *
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* *
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* Free Software Foundation Voice: +1-617-542-5942 *
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* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
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* Boston, MA 02110-1301, USA gnu@gnu.org *
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\********************************************************************/
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extern "C"
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{
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#include <glib.h>
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}
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#include <clocale>
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#include <boost/locale.hpp>
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#include "gnc-locale-utils.hpp"
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#include <config.h>
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/** Cache the UI locale
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*
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* We don't want to set the default locale because we need
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* std::locale::classic for consistency in stored data. We also don't
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* want to call std::locale("") more than once, it's slow... and we
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* don't want to call it on MinGW32 at all because that supports only
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* std::locale::classic and throws if you try to construct anything
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* else. Boost::locale doesn't support std::locale::facet required by
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* boost::datetime (go figure).
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*
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* @return a copy of std::locale::classic() on MinGW32 and a copy of
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* the cached result of std::locale("") otherwise.
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*/
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const std::locale&
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gnc_get_locale()
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{
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#ifdef __MINGW32__
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return std::locale::classic(); // Nothing else supported.
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#else
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static std::locale cached;
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static bool tried_already = false;
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if (!tried_already)
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{
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tried_already = true;
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try
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{
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cached = std::locale("");
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}
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catch (const std::runtime_error& err)
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{
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char* locale = g_strdup(setlocale(LC_ALL, ""));
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g_log(G_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
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"Failed to create C++ default locale from"
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"%s because %s. Using the 'C' locale for C++.",
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locale, err.what());
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g_free(locale);
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cached = std::locale::classic();
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}
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}
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return cached;
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#endif
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}
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static std::locale boost_cached;
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static bool tried_boost_already = false;
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void
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gnc_init_boost_locale (const std::string& messages_path)
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{
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if (!tried_boost_already)
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{
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tried_boost_already = true;
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try
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{
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boost::locale::generator gen;
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if (!messages_path.empty())
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gen.add_messages_path(messages_path);
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else
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g_log(G_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
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"Attempt to initialize boost_locale without a message_path. "
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"If message catalogs are not installed in the system's default locations "
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"user interface strings will not be translated.");
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gen.add_messages_domain(PROJECT_NAME);
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boost_cached = gen ("");
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}
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catch (const std::runtime_error& err)
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{
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char* locale = g_strdup(setlocale(LC_ALL, ""));
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g_log(G_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
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"Failed to create C++ default locale from"
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"%s because %s. Using the 'C' locale for C++.",
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locale, err.what());
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boost_cached = std::locale::classic();
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}
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}
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}
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const std::locale&
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gnc_get_boost_locale()
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{
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return boost_cached;
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}
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