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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef I18_N_HEADER_3843489325045
#define I18_N_HEADER_3843489325045
#include <string>
#include <memory>
#include <cstdint>
#include "string_tools.h"
#include "format_unit.h"
//minimal layer enabling text translation - without platform/library dependencies!
#ifdef __WXMSW__ //we have wxWidgets
#ifndef WXINTL_NO_GETTEXT_MACRO
#error WXINTL_NO_GETTEXT_MACRO must be defined to deactivate wxWidgets underscore macro
#endif
#endif
#define ZEN_TRANS_CONCAT_SUB(X, Y) X ## Y
#define _(s) zen::implementation::translate(ZEN_TRANS_CONCAT_SUB(L, s))
#define _P(s, p, n) zen::implementation::translate(ZEN_TRANS_CONCAT_SUB(L, s), ZEN_TRANS_CONCAT_SUB(L, p), n)
//source and translation are required to use %x as number placeholder
//for plural form, which will be substituted automatically!!!
namespace zen
{
//implement handler to enable program wide localizations: implement THREAD-SAFE ACCESS!
struct TranslationHandler
{
virtual ~TranslationHandler() {}
virtual std::wstring translate(const std::wstring& text) = 0; //simple translation
virtual std::wstring translate(const std::wstring& singular, const std::wstring& plural, std::int64_t n) = 0;
};
void setTranslator(TranslationHandler* newHandler = nullptr); //takes ownership
TranslationHandler* getTranslator();
//######################## implementation ##############################
namespace implementation
{
inline
std::wstring translate(const std::wstring& text)
{
return getTranslator() ? getTranslator()->translate(text) : text;
}
//translate plural forms: "%x day" "%x days"
//returns "1 day" if n == 1; "123 days" if n == 123 for english language
inline
std::wstring translate(const std::wstring& singular, const std::wstring& plural, std::int64_t n)
{
assert(contains(plural, L"%x"));
if (getTranslator())
{
std::wstring translation = getTranslator()->translate(singular, plural, n);
assert(!contains(translation, L"%x"));
return translation;
}
else
return replaceCpy(std::abs(n) == 1 ? singular : plural, L"%x", toGuiString(n));
}
template <class T> inline
std::wstring translate(const std::wstring& singular, const std::wstring& plural, T n)
{
static_assert(sizeof(n) <= sizeof(std::int64_t), "");
return translate(singular, plural, static_cast<std::int64_t>(n));
}
inline
std::unique_ptr<TranslationHandler>& globalHandler()
{
static std::unique_ptr<TranslationHandler> inst; //external linkage even in header!
return inst;
}
}
inline
void setTranslator(TranslationHandler* newHandler) { implementation::globalHandler().reset(newHandler); } //takes ownership
inline
TranslationHandler* getTranslator() { return implementation::globalHandler().get(); }
}
#endif //I18_N_HEADER_3843489325045
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