// **************************************************************************
// * 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) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
// **************************************************************************
//
#include "localization.h"
#include <wx/msgdlg.h>
#include "../shared/standard_paths.h"
#include "../shared/string_conv.h"
#include "system_constants.h"
#include <fstream>
#include <map>
#include <wx/ffile.h>

#if wxCHECK_VERSION(2, 9, 1)
#include <boost/cstdint.hpp>
#include <wx/translation.h>
#include <cstdlib>
#endif

using ffs3::CustomLocale;
using ffs3::LocalizationInfo;

//_("Browse") <- dummy string for wxDirPickerCtrl to be recognized by automatic text extraction!


namespace
{
//will receive their proper value in CustomLocale::CustomLocale()
wxString THOUSANDS_SEPARATOR = wxT(",");
wxString DECIMAL_POINT       = wxT(".");
}


wxString ffs3::getThousandsSeparator()
{
    return THOUSANDS_SEPARATOR;
}


wxString ffs3::getDecimalPoint()
{
    return DECIMAL_POINT;
}


const std::vector<ffs3::LocInfoLine>& LocalizationInfo::getMapping()
{
    static LocalizationInfo instance;
    return instance.locMapping;
}


namespace
{
struct CompareByName : public std::binary_function<ffs3::LocInfoLine, ffs3::LocInfoLine, bool>
{
    bool operator()(const ffs3::LocInfoLine& lhs, const ffs3::LocInfoLine& rhs) const
    {
        return lhs.languageName < rhs.languageName;
    }
};
}


LocalizationInfo::LocalizationInfo()
{
    ffs3::LocInfoLine newEntry;

    newEntry.languageID     = wxLANGUAGE_CZECH;
    newEntry.languageName   = wxT("Čeština");
    newEntry.languageFile   = wxT("czech.lng");
    newEntry.translatorName = wxT("ViCi");
    newEntry.languageFlag   = wxT("czechRep.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_GERMAN;
    newEntry.languageName   = wxT("Deutsch");
    newEntry.languageFile   = wxT("german.lng");
    newEntry.translatorName = wxT("ZenJu");
    newEntry.languageFlag   = wxT("germany.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_ENGLISH_UK;
    newEntry.languageName   = wxT("English (UK)");
    newEntry.languageFile   = wxT("english_uk.lng");
    newEntry.translatorName = wxT("Robert Readman");
    newEntry.languageFlag   = wxT("england.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_ENGLISH;
    newEntry.languageName   = wxT("English (US)");
    newEntry.languageFile   = wxT("");
    newEntry.translatorName = wxT("ZenJu");
    newEntry.languageFlag   = wxT("usa.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_SPANISH;
    newEntry.languageName   = wxT("Español");
    newEntry.languageFile   = wxT("spanish.lng");
    newEntry.translatorName = wxT("Alexis Martínez");
    newEntry.languageFlag   = wxT("spain.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_GREEK;
    newEntry.languageName   = wxT("Ελληνικά");
    newEntry.languageFile   = wxT("greek.lng");
    newEntry.translatorName = wxT("Γιώργος Γιαγλής");
    newEntry.languageFlag   = wxT("greece.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_FRENCH;
    newEntry.languageName   = wxT("Français");
    newEntry.languageFile   = wxT("french.lng");
    newEntry.translatorName = wxT("Jean-François Hartmann");
    newEntry.languageFlag   = wxT("france.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_ITALIAN;
    newEntry.languageName   = wxT("Italiano");
    newEntry.languageFile   = wxT("italian.lng");
    newEntry.translatorName = wxT("Emmo");
    newEntry.languageFlag   = wxT("italy.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_HUNGARIAN;
    newEntry.languageName   = wxT("Magyar");
    newEntry.languageFile   = wxT("hungarian.lng");
    newEntry.translatorName = wxT("Demon");
    newEntry.languageFlag   = wxT("hungary.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_DUTCH;
    newEntry.languageName   = wxT("Nederlands");
    newEntry.languageFile   = wxT("dutch.lng");
    newEntry.translatorName = wxT("Dion van Lieshout");
    newEntry.languageFlag   = wxT("holland.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_POLISH;
    newEntry.languageName   = wxT("Polski");
    newEntry.languageFile   = wxT("polish.lng");
    newEntry.translatorName = wxT("Wojtek Pietruszewski");
    newEntry.languageFlag   = wxT("poland.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_PORTUGUESE;
    newEntry.languageName   = wxT("Português");
    newEntry.languageFile   = wxT("portuguese.lng");
    newEntry.translatorName = wxT("QuestMark");
    newEntry.languageFlag   = wxT("portugal.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_PORTUGUESE_BRAZILIAN;
    newEntry.languageName   = wxT("Português do Brasil");
    newEntry.languageFile   = wxT("portuguese_br.lng");
    newEntry.translatorName = wxT("Edison Aranha");
    newEntry.languageFlag   = wxT("brazil.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_RUSSIAN;
    newEntry.languageName   = wxT("Pусский");
    newEntry.languageFile   = wxT("russian.lng");
    newEntry.translatorName = wxT("Fayzullin T.N. aka Svobodniy");
    newEntry.languageFlag   = wxT("russia.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_ROMANIAN;
    newEntry.languageName   = wxT("Română");
    newEntry.languageFile   = wxT("romanian.lng");
    newEntry.translatorName = wxT("Alexandru Bogdan Munteanu");
    newEntry.languageFlag   = wxT("romania.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_SLOVENIAN;
    newEntry.languageName   = wxT("Slovenščina");
    newEntry.languageFile   = wxT("slovenian.lng");
    newEntry.translatorName = wxT("Matej Badalic");
    newEntry.languageFlag   = wxT("slovakia.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_FINNISH;
    newEntry.languageName   = wxT("Suomi");
    newEntry.languageFile   = wxT("finnish.lng");
    newEntry.translatorName = wxT("Nalle Juslén");
    newEntry.languageFlag   = wxT("finland.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_SWEDISH;
    newEntry.languageName   = wxT("Svenska");
    newEntry.languageFile   = wxT("swedish.lng");
    newEntry.translatorName = wxT("Åke Engelbrektson");
    newEntry.languageFlag   = wxT("sweden.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_TURKISH;
    newEntry.languageName   = wxT("Türkçe");
    newEntry.languageFile   = wxT("turkish.lng");
    newEntry.translatorName = wxT("Kaya Zeren");
    newEntry.languageFlag   = wxT("turkey.png");
    locMapping.push_back(newEntry);

    //    newEntry.languageID     = wxLANGUAGE_HEBREW;
    //    newEntry.languageName   = wxT("עִבְרִית");
    //    newEntry.languageFile   = wxT("hebrew.lng");
    //    newEntry.translatorName = wxT("Moshe Olshevsky");
    //    newEntry.languageFlag   = wxT("isreal.png");
    //    locMapping.push_back(newEntry);

    //    newEntry.languageID     = wxLANGUAGE_ARABIC;
    //    newEntry.languageName   = wxT("العربية");
    //    newEntry.languageFile   = wxT("arabic.lng");
    //    newEntry.translatorName = wxT("Yousef Shamshoum");
    //    newEntry.languageFlag   = wxT("arabic-language.png");
    //    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_JAPANESE;
    newEntry.languageName   = wxT("日本語");
    newEntry.languageFile   = wxT("japanese.lng");
    newEntry.translatorName = wxT("Tilt");
    newEntry.languageFlag   = wxT("japan.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_CHINESE_TRADITIONAL;
    newEntry.languageName   = wxT("正體中文");
    newEntry.languageFile   = wxT("chinese_traditional.lng");
    newEntry.translatorName = wxT("Carlos");
    newEntry.languageFlag   = wxT("taiwan.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_CHINESE_SIMPLIFIED;
    newEntry.languageName   = wxT("简体中文");
    newEntry.languageFile   = wxT("chinese_simple.lng");
    newEntry.translatorName = wxT("CyberCowBoy");
    newEntry.languageFlag   = wxT("china.png");
    locMapping.push_back(newEntry);

    newEntry.languageID     = wxLANGUAGE_KOREAN;
    newEntry.languageName   = wxT("한국어");
    newEntry.languageFile   = wxT("korean.lng");
    newEntry.translatorName = wxT("Simon Park");
    newEntry.languageFlag   = wxT("south_korea.png");
    locMapping.push_back(newEntry);

    //std::sort(locMapping.begin(), locMapping.end(), CompareByName());
}


namespace
{
int mapLanguageDialect(int language)
{
    switch (language) //map language dialects
    {
            //variants of wxLANGUAGE_GERMAN
        case wxLANGUAGE_GERMAN_AUSTRIAN:
        case wxLANGUAGE_GERMAN_BELGIUM:
        case wxLANGUAGE_GERMAN_LIECHTENSTEIN:
        case wxLANGUAGE_GERMAN_LUXEMBOURG:
        case wxLANGUAGE_GERMAN_SWISS:
            return wxLANGUAGE_GERMAN;

            //variants of wxLANGUAGE_FRENCH
        case wxLANGUAGE_FRENCH_BELGIAN:
        case wxLANGUAGE_FRENCH_CANADIAN:
        case wxLANGUAGE_FRENCH_LUXEMBOURG:
        case wxLANGUAGE_FRENCH_MONACO:
        case wxLANGUAGE_FRENCH_SWISS:
            return wxLANGUAGE_FRENCH;

            //variants of wxLANGUAGE_DUTCH
        case wxLANGUAGE_DUTCH_BELGIAN:
            return wxLANGUAGE_DUTCH;

            //variants of wxLANGUAGE_ITALIAN
        case wxLANGUAGE_ITALIAN_SWISS:
            return wxLANGUAGE_ITALIAN;

            //variants of wxLANGUAGE_CHINESE_SIMPLIFIED
        case wxLANGUAGE_CHINESE:
        case wxLANGUAGE_CHINESE_SINGAPORE:
            return wxLANGUAGE_CHINESE_SIMPLIFIED;

            //variants of wxLANGUAGE_CHINESE_TRADITIONAL
        case wxLANGUAGE_CHINESE_TAIWAN:
        case wxLANGUAGE_CHINESE_HONGKONG:
        case wxLANGUAGE_CHINESE_MACAU:
            return wxLANGUAGE_CHINESE_TRADITIONAL;

            //variants of wxLANGUAGE_RUSSIAN
        case wxLANGUAGE_RUSSIAN_UKRAINE:
            return wxLANGUAGE_RUSSIAN;

            //variants of wxLANGUAGE_SPANISH
        case wxLANGUAGE_SPANISH_ARGENTINA:
        case wxLANGUAGE_SPANISH_BOLIVIA:
        case wxLANGUAGE_SPANISH_CHILE:
        case wxLANGUAGE_SPANISH_COLOMBIA:
        case wxLANGUAGE_SPANISH_COSTA_RICA:
        case wxLANGUAGE_SPANISH_DOMINICAN_REPUBLIC:
        case wxLANGUAGE_SPANISH_ECUADOR:
        case wxLANGUAGE_SPANISH_EL_SALVADOR:
        case wxLANGUAGE_SPANISH_GUATEMALA:
        case wxLANGUAGE_SPANISH_HONDURAS:
        case wxLANGUAGE_SPANISH_MEXICAN:
        case wxLANGUAGE_SPANISH_MODERN:
        case wxLANGUAGE_SPANISH_NICARAGUA:
        case wxLANGUAGE_SPANISH_PANAMA:
        case wxLANGUAGE_SPANISH_PARAGUAY:
        case wxLANGUAGE_SPANISH_PERU:
        case wxLANGUAGE_SPANISH_PUERTO_RICO:
        case wxLANGUAGE_SPANISH_URUGUAY:
        case wxLANGUAGE_SPANISH_US:
        case wxLANGUAGE_SPANISH_VENEZUELA:
            return wxLANGUAGE_SPANISH;

            //variants of wxLANGUAGE_SWEDISH
        case wxLANGUAGE_SWEDISH_FINLAND:
            return wxLANGUAGE_SWEDISH;

            //case wxLANGUAGE_CZECH:
            //case wxLANGUAGE_FINNISH:
            //case wxLANGUAGE_GREEK:
            //case wxLANGUAGE_JAPANESE:
            //case wxLANGUAGE_POLISH:
            //case wxLANGUAGE_SLOVENIAN:
            //case wxLANGUAGE_HUNGARIAN:
            //case wxLANGUAGE_PORTUGUESE:
            //case wxLANGUAGE_PORTUGUESE_BRAZILIAN:
            //case wxLANGUAGE_KOREAN:

            //variants of wxLANGUAGE_ARABIC (also needed to detect RTL languages)
        case wxLANGUAGE_ARABIC_ALGERIA:
        case wxLANGUAGE_ARABIC_BAHRAIN:
        case wxLANGUAGE_ARABIC_EGYPT:
        case wxLANGUAGE_ARABIC_IRAQ:
        case wxLANGUAGE_ARABIC_JORDAN:
        case wxLANGUAGE_ARABIC_KUWAIT:
        case wxLANGUAGE_ARABIC_LEBANON:
        case wxLANGUAGE_ARABIC_LIBYA:
        case wxLANGUAGE_ARABIC_MOROCCO:
        case wxLANGUAGE_ARABIC_OMAN:
        case wxLANGUAGE_ARABIC_QATAR:
        case wxLANGUAGE_ARABIC_SAUDI_ARABIA:
        case wxLANGUAGE_ARABIC_SUDAN:
        case wxLANGUAGE_ARABIC_SYRIA:
        case wxLANGUAGE_ARABIC_TUNISIA:
        case wxLANGUAGE_ARABIC_UAE:
        case wxLANGUAGE_ARABIC_YEMEN:
            return wxLANGUAGE_ARABIC;

            //variants of wxLANGUAGE_ENGLISH_UK
        case wxLANGUAGE_ENGLISH_AUSTRALIA:
        case wxLANGUAGE_ENGLISH_NEW_ZEALAND:
        case wxLANGUAGE_ENGLISH_TRINIDAD:
        case wxLANGUAGE_ENGLISH_CARIBBEAN:
        case wxLANGUAGE_ENGLISH_JAMAICA:
        case wxLANGUAGE_ENGLISH_BELIZE:
        case wxLANGUAGE_ENGLISH_EIRE:
        case wxLANGUAGE_ENGLISH_SOUTH_AFRICA:
        case wxLANGUAGE_ENGLISH_ZIMBABWE:
        case wxLANGUAGE_ENGLISH_BOTSWANA:
        case wxLANGUAGE_ENGLISH_DENMARK:
            return wxLANGUAGE_ENGLISH_UK;

        default:
            return language;
    }
}


inline
void exchangeEscapeChars(wxString& data)
{
    wxString output;

    const wxChar* input = data.c_str();

    wxChar value;
    while ((value = *input) != wxChar(0))
    {
        //read backslash
        if (value == wxChar('\\'))
        {
            //read next character
            ++input;
            if ((value = *input) == wxChar(0))
                break;

            switch (value)
            {
                case wxChar('\\'):
                    output += wxChar('\\');
                    break;
                case wxChar('n'):
                    output += wxChar('\n');
                    break;
                case wxChar('t'):
                    output += wxChar('\t');
                    break;
                case wxChar('\"'):
                    output += wxChar('\"');
                    break;
                default:
                    output += value;
            }
        }
        else
            output += value;

        ++input;
    }
    data = output;
}


//workaround to get a FILE* from a unicode filename in a portable way
class UnicodeFileReader
{
public:
    UnicodeFileReader(const wxString& filename) :
        inputFile(NULL)
    {
        wxFFile dummyFile(filename, wxT("rb"));
        if (dummyFile.IsOpened())
        {
            inputFile = dummyFile.fp();
            dummyFile.Detach();
        }
    }

    ~UnicodeFileReader()
    {
        if (inputFile != NULL)
            fclose(inputFile);
    }

    bool isOkay()
    {
        return inputFile != NULL;
    }

    bool getNextLine(wxString& line)
    {
        std::string output;

        while (true)
        {
            const int c = fgetc(inputFile);
            if (c == EOF)
                return false;
            else if (c == 0xD)
            {
                //Delimiter:
                //----------
                //Linux: 0xA        \n
                //Mac:   0xD        \r
                //Win:   0xD 0xA    \r\n    <- language files are in Windows format

                fgetc(inputFile);  //discard the 0xA character

                line = wxString::FromUTF8(output.c_str(), output.length());
                return true;
            }
            output += static_cast<char>(c);
        }
    }

private:
    FILE* inputFile;
};


typedef std::map<wxString, wxString> TranslationMap; //map original text |-> translation

void loadTranslation(const wxString& filename, TranslationMap& trans) //empty translation on error
{
    trans.clear();

    UnicodeFileReader langFile(ffs3::getResourceDir() +  wxT("Languages") + ffs3::zToWx(common::FILE_NAME_SEPARATOR) + filename);
    if (langFile.isOkay())
    {
        //save encoding info: required by mo file generator
        trans.insert(std::make_pair(wxEmptyString, wxT("Content-Type: text/plain; charset=UTF-8\n")));

        int rowNumber = 0;
        wxString original;
        wxString tmpString;
        while (langFile.getNextLine(tmpString))
        {
            exchangeEscapeChars(tmpString);

            if (rowNumber++ % 2 == 0)
                original = tmpString;
            else
            {
                const wxString& translation = tmpString;

                if (!original.empty() && !translation.empty())
                    trans.insert(std::make_pair(original, translation));
            }
        }
    }
}
}


#if wxCHECK_VERSION(2, 9, 1)
//this whole abomination is required to support language formats other than "mo" in wxWidgets v2.9
class FFSTranslationLoader : public wxTranslationsLoader
{
public:
    static const wxString domainName()
    {
        return wxT("FFS");
    }

    FFSTranslationLoader(const TranslationMap& trans, wxLanguage langId) : langId_(langId)
    {
        //generate mo file: http://www.gnu.org/software/hello/manual/gettext/MO-Files.html

        std::string binaryStream;

        const size_t offsetTableOrig   = sizeof(wxMsgCatalogHeader);
        const size_t offsetTableTrans  = offsetTableOrig  + trans.size() * sizeof(wxMsgTableEntry);
        const size_t offsetTableString = offsetTableTrans + trans.size() * sizeof(wxMsgTableEntry);

        wxMsgCatalogHeader header =
        {
            0x950412de,       //magic number (save in this machine's byte order)
            0,                //revision
            trans.size(),     //numStrings
            offsetTableOrig,  //ofsOrigTable
            offsetTableTrans, //ofsTransTable
            0,                //nHashSize
            0,                //ofsHashTable
        };
        writeCobject(binaryStream, header);

        std::string tableOrig;
        std::string tableTrans;
        std::string stringsList;
        for (TranslationMap::const_iterator i = trans.begin(); i != trans.end(); ++i)
        {

#ifndef _MSC_VER
#warning redundant UTF8 conversion!!!
#endif
            std::string origString = i->first.ToUTF8();
            const wxMsgTableEntry origEntry = {origString.length(), offsetTableString + stringsList.size()};
            writeCobject(tableOrig, origEntry);
            stringsList.append(origString.c_str(), origString.length() + 1); //include NULL-termination

#ifndef _MSC_VER
#warning redundant UTF8 conversion!!!
#endif
            std::string transString = i->second.ToUTF8();
            const wxMsgTableEntry transEntry = {transString.length(), offsetTableString + stringsList.size()};
            writeCobject(tableTrans, transEntry);
            stringsList.append(transString.c_str(), transString.length() + 1); //include NULL-termination
        }
        binaryStream += tableOrig;
        binaryStream += tableTrans;
        binaryStream += stringsList;

        buffer = wxScopedCharBuffer::CreateOwned(static_cast<char*>(::malloc(binaryStream.size())), binaryStream.size()); //takes buffer ownership, calls ::free()
        std::copy(binaryStream.begin(), binaryStream.end(), buffer.data());
    }

    virtual wxMsgCatalog* LoadCatalog(const wxString& domain, const wxString& lang)
    {
        if (domain != domainName() || lang != wxLocale::GetLanguageCanonicalName(langId_)) //avoid superfluous calls by wxWidgets framework
            return NULL;

        return wxMsgCatalog::CreateFromData(buffer, domain);
    }

    virtual wxArrayString GetAvailableTranslations(const wxString& domain) const
    {
        wxArrayString output;
        if (domain == domainName())
            output.Add(wxLocale::GetLanguageCanonicalName(langId_));
        return output;
    }

private:
    struct wxMsgTableEntry
    {
        boost::uint32_t nLen,           // length of the string
              ofsString;      // pointer to the string
    };

    // header of a .mo file
    struct wxMsgCatalogHeader
    {
        boost::uint32_t magic,          // offset +00:  magic id
              revision,       //        +04:  revision
              numStrings,     //        +08:  number of strings in the file
              ofsOrigTable,   //        +0C:  start of original string table
              ofsTransTable,  //        +10:  start of translated string table
              nHashSize,      //        +14:  hash table size
              ofsHashTable;   //        +18:  offset of hash table start
    };

    template <class T>
    void writeCobject(std::string& str, T obj)
    {
        str.append(reinterpret_cast<const char*>(&obj), sizeof(obj));
    }

    wxScopedCharBuffer buffer; //raw data in mo file format
    const wxLanguage langId_;
};
#endif


CustomLocale& CustomLocale::getInstance()
{
    static CustomLocale instance;
    return instance;
}


class Translation : public TranslationMap {};


CustomLocale::CustomLocale() :
    translationDB(new Translation),
    currentLanguage(wxLANGUAGE_ENGLISH)
{
    Init(wxLANGUAGE_DEFAULT); //setting a different language needn't be supported on all systems!

    //actually these two parameters are language dependent, but we take system setting to handle all kinds of language derivations
    const lconv* localInfo = localeconv();
    THOUSANDS_SEPARATOR = wxString::FromUTF8(localInfo->thousands_sep);
    DECIMAL_POINT       = wxString::FromUTF8(localInfo->decimal_point);

    // why not working?
    // THOUSANDS_SEPARATOR = std::use_facet<std::numpunct<wchar_t> >(std::locale("")).thousands_sep();
    // DECIMAL_POINT       = std::use_facet<std::numpunct<wchar_t> >(std::locale("")).decimal_point();
}


CustomLocale::~CustomLocale() {} //non-inline destructor for std::auto_ptr to work with forward declaration


void CustomLocale::setLanguage(int language)
{
    currentLanguage = static_cast<wxLanguage>(language);

    //default: english
    wxString languageFile;

    //(try to) retrieve language filename
    const int mappedLanguage = mapLanguageDialect(language);
    for (std::vector<LocInfoLine>::const_iterator i = LocalizationInfo::getMapping().begin(); i != LocalizationInfo::getMapping().end(); ++i)
        if (i->languageID == mappedLanguage)
        {
            languageFile = i->languageFile;
            break;
        }

    //load language file into buffer
    translationDB->clear();
    if (!languageFile.empty())
    {
        loadTranslation(languageFile, *translationDB); //empty translation on error
        if (translationDB->empty())
        {
            wxMessageBox(wxString(_("Error reading file:")) + wxT(" \"") + languageFile + wxT("\""), _("Error"), wxOK | wxICON_ERROR);
            currentLanguage = wxLANGUAGE_ENGLISH; //reset to english language to show this error just once
        }
    }
    else
        ;   //if languageFile is empty texts will be english per default



#if wxCHECK_VERSION(2, 9, 1)
    wxTranslations::Set(new wxTranslations);
    wxTranslations::Get()->SetLoader(new FFSTranslationLoader(*translationDB, currentLanguage)); //ownership passed
    wxTranslations::Get()->SetLanguage(currentLanguage);
    wxTranslations::Get()->AddCatalog(FFSTranslationLoader::domainName(), wxLANGUAGE_ENGLISH_US);
    //... a little over design going on?!?
#endif
}


const wxChar* CustomLocale::GetString(const wxChar* szOrigString, const wxChar* szDomain) const
{
    //look for translation in buffer table
    const Translation::const_iterator i = translationDB->find(szOrigString);
    if (i != translationDB->end())
        return i->second.c_str();

    //fallback
    return szOrigString;
}