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#include "LocalisationProvider.h"
#include <fstream>
#include <stdexcept>
#include "itextstream.h"
#include "registry/registry.h"
#include "settings/SettingsManager.h"
#include "string/case_conv.h"
#include "os/path.h"
#include <wx/translation.h>
#include <wx/intl.h>
#include <wx/arrstr.h>
namespace settings
{
namespace
{
const char* const LANGUAGE_SETTING_FILE = "darkradiant.language";
const char* const DEFAULT_LANGUAGE = "en";
}
class UnknownLanguageException :
public std::runtime_error
{
public:
UnknownLanguageException(const std::string& what) :
std::runtime_error(what)
{}
};
const char* const LocalisationProvider::RKEY_LANGUAGE = "user/ui/language";
LocalisationProvider::LocalisationProvider(IApplicationContext& ctx)
{
// Point wxWidgets to the folder where the catalog files are stored
_i18nPath = os::standardPathWithSlash(ctx.getApplicationPath() + "i18n");
wxFileTranslationsLoader::AddCatalogLookupPathPrefix(_i18nPath);
// Load the persisted language setting
settings::SettingsManager manager(ctx);
_languageSettingFile = manager.getCurrentVersionSettingsFolder() + LANGUAGE_SETTING_FILE;
_curLanguage = loadLanguageSetting();
rMessage() << "Current language setting: " << _curLanguage << std::endl;
// Fill array of supported languages
loadSupportedLanguages();
// Fill array of available languages
findAvailableLanguages();
// Keep locale set to "C" for faster stricmp in Windows builds
_wxLocale.reset(new wxLocale(_curLanguage, _curLanguage, "C"));
_wxLocale->AddCatalog(GETTEXT_PACKAGE);
}
std::shared_ptr<LocalisationProvider>& LocalisationProvider::Instance()
{
static std::shared_ptr<LocalisationProvider> _instancePtr;
return _instancePtr;
}
void LocalisationProvider::Initialise(IApplicationContext& context)
{
Instance().reset(new LocalisationProvider(context));
}
void LocalisationProvider::Cleanup()
{
Instance().reset();
}
std::string LocalisationProvider::getLocalisedString(const char* stringToLocalise)
{
return wxGetTranslation(stringToLocalise).ToStdString();
}
std::string LocalisationProvider::loadLanguageSetting()
{
std::string language = DEFAULT_LANGUAGE;
// Check for an existing language setting file in the user settings folder
std::ifstream str(_languageSettingFile.c_str());
if (str.good())
{
str >> language;
}
str.close();
return language;
}
void LocalisationProvider::saveLanguageSetting(const std::string& language)
{
std::ofstream str(_languageSettingFile.c_str());
str << language;
str.flush();
str.close();
}
void LocalisationProvider::foreachAvailableLanguage(const std::function<void(const Language&)>& functor)
{
for (int code : _availableLanguages)
{
functor(_supportedLanguages[code]);
}
}
int LocalisationProvider::getCurrentLanguageIndex() const
{
// Set up the indices
int curLanguageIndex = 0; // english
try
{
int index = LocalisationProvider::Instance()->getLanguageIndex(_curLanguage);
// Get the offset into the array of available languages
auto found = std::find(_availableLanguages.begin(), _availableLanguages.end(), index);
if (found != _availableLanguages.end())
{
curLanguageIndex = static_cast<int>(std::distance(_availableLanguages.begin(), found));
}
}
catch (UnknownLanguageException&)
{
rWarning() << "Warning, unknown language found in " <<
LANGUAGE_SETTING_FILE << ", reverting to English" << std::endl;
}
return curLanguageIndex;
}
void LocalisationProvider::loadSupportedLanguages()
{
_supportedLanguages.clear();
int index = 0;
_supportedLanguages[index++] = Language("en", _("English"));
_supportedLanguages[index++] = Language("de", _("German"));
}
void LocalisationProvider::findAvailableLanguages()
{
// English (index 0) is always available
_availableLanguages.push_back(0);
wxFileTranslationsLoader loader;
wxArrayString translations = loader.GetAvailableTranslations(GETTEXT_PACKAGE);
for (const auto& lang : translations)
{
// Get the index (is this a known language?)
try
{
int index = getLanguageIndex(lang.ToStdString());
// Add this to the list (could use more extensive checking, but this is enough for now)
_availableLanguages.push_back(index);
}
catch (UnknownLanguageException&)
{
rWarning() << "Skipping unknown language: " << lang << std::endl;
}
}
rMessage() << "Found " << _availableLanguages.size() << " language folders." << std::endl;
}
int LocalisationProvider::getLanguageIndex(const std::string& languageCode)
{
std::string code = string::to_lower_copy(languageCode);
for (const auto& pair : _supportedLanguages)
{
if (pair.second.twoDigitCode == code)
{
return pair.first;
}
}
throw UnknownLanguageException("Unknown language: " + languageCode);
}
void LocalisationProvider::saveLanguageSetting()
{
// Get the language setting from the registry (this is an integer)
// and look up the language code (two digit)
int langNum = registry::getValue<int>(RKEY_LANGUAGE);
assert(langNum >= 0 && langNum < static_cast<int>(_availableLanguages.size()));
// Look up the language index in the list of available languages
int langIndex = _availableLanguages[langNum];
assert(_supportedLanguages.find(langIndex) != _supportedLanguages.end());
// Save the language code to the settings file
saveLanguageSetting(_supportedLanguages[langIndex].twoDigitCode);
}
}
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