Method availableCodecs

src/Utils.cpp:194–219

QStringConverter::availableCodecs() returns codecs that are from our perspective duplicates or are specialized single purpose codecs. Additionally Qt un-helpfully adds "Locale" to the list. */

    are specialized single purpose codecs. Additionally Qt un-helpfully adds "Locale" to the list.
*/
QStringList Utils::availableCodecs(){
    const std::set<QString> ignored = { "Adobe-Standard-Encoding", "Extended_UNIX_Code_Packed_Format_for_Japanese","UTF-7" };
    const QRegularExpression regExp(",");
    qint32 codecCount = ucnv_countAvailable();
    QStringList result;

    regExp.optimize();
    result.reserve(codecCount);
    for(qint32 i = 0; i < codecCount; ++i)
    {
        UErrorCode status = U_ZERO_ERROR;
        const char* icuName = ucnv_getAvailableName(i);
        const char* standardName = ucnv_getStandardName(icuName, "IANA", &status);

        if(U_FAILURE(status) || !standardName) {
            continue;
        }

        const QString name = QString::fromLatin1(standardName);
        if(ignored.find(name) != ignored.cend())
            continue;

        result.push_back(name);
    }
    return result;
}