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#include "unicode.hh"
#include "configuration.hh"
#include "game.hh"
#include <regex>
#include <stdexcept>
#include <unicode/unistr.h>
#include <unicode/ustream.h>
#include <unicode/ubidi.h>
#include "../ced/compact_enc_det/compact_enc_det.h"
std::unique_ptr<icu::RuleBasedCollator> UnicodeUtil::m_searchCollator;
std::unique_ptr<icu::RuleBasedCollator> UnicodeUtil::m_sortCollator;
std::map<std::string, Converter> UnicodeUtil::m_converters{};
Converter::Converter(std::string const& codepage): m_codepage(codepage), m_converter(nullptr, &ucnv_close) {
m_converter = std::unique_ptr<UConverter, decltype(&ucnv_close)>(ucnv_open(m_codepage.c_str(), m_error), &ucnv_close);
if (m_error.isFailure()) throw std::runtime_error("unicode/error: " + std::to_string(m_error.get()) + ": " + std::string(m_error.errorName()));
}
Converter::Converter(Converter&& c) noexcept:
m_codepage(std::move(c.m_codepage)),
m_converter(std::move(c.m_converter)),
m_error(std::move(c.m_error)) {}
icu::UnicodeString Converter::convertToUTF8(std::string_view sv) {
std::scoped_lock l(m_lock);
icu::UnicodeString ret(sv.data(), -1, m_converter.get(), m_error);
if (m_error.isFailure()) throw std::runtime_error("Couldn't convert string: " + std::string(sv) + " to UTF-8. Error: " + std::to_string(m_error.get()) + ": " + m_error.errorName());
return ret;
}
Converter& UnicodeUtil::getConverter(std::string const& s) {
return m_converters.try_emplace(s, Converter(s)).first->second;
}
std::string UnicodeUtil::getCharset (std::string_view& str) {
int bytes_consumed;
bool is_reliable;
if (removeUTF8BOM(str)) return "UTF-8";
Encoding encoding = CompactEncDet::DetectEncoding(
str.data(), static_cast<int>(str.size()),
nullptr, nullptr, nullptr,
UNKNOWN_ENCODING,
UNKNOWN_LANGUAGE,
CompactEncDet::WEB_CORPUS,
true,
&bytes_consumed,
&is_reliable);
if (!is_reliable) {
std::clog << "unicode/warning: detected encoding (" <<
MimeEncodingName(encoding) << ") for text: " <<
((str.size() <= 256) ? str : str.substr(0,255)) <<
" was flagged as not reliable." <<
std::endl; // Magic number, so sue me.
}
return MimeEncodingName(encoding);
}
std::string UnicodeUtil::convertToUTF8 (std::string_view str, std::string _filename, CaseMapping toCase, bool assumeUTF8) {
icu::UnicodeString ustring;
std::string charset;
if (assumeUTF8) charset = "UTF-8";
else charset = UnicodeUtil::getCharset(str);
if (charset != "UTF-8") {
if (!_filename.empty()) std::clog << "unicode/info: " << _filename << " does not appear to be UTF-8; (" << charset << ") detected." << std::endl;
ustring = UnicodeUtil::getConverter(charset).convertToUTF8(str);
}
else { ustring = icu::UnicodeString::fromUTF8(str.data()); }
switch(toCase) {
case CaseMapping::UPPER:
ustring.toUpper();
break;
case CaseMapping::LOWER:
ustring.toLower();
break;
case CaseMapping::TITLE:
ustring.toTitle(0, icu::Locale(TranslationEngine::getCurrentLanguageCode().c_str()), U_TITLECASE_NO_LOWERCASE);
break;
case CaseMapping::NONE:
break;
}
std::string ret;
if (!ustring.isEmpty()) {
ustring.toUTF8String(ret);
}
else {
if (!ret.empty()) {
std::clog << "unicode/error: tried to convert text in an unknown encoding: " << charset << std::endl;
}
}
return ret;
}
bool UnicodeUtil::removeUTF8BOM(std::string_view& str) {
// Test for UTF-8 BOM (a three-byte sequence at the beginning of a file)
if (str.substr(0, 3) == "\xEF\xBB\xBF") {
str = str.substr(3); // Remove BOM if there is one
return true;
}
return false;
}
bool UnicodeUtil::caseEqual (std::string_view lhs, std::string_view rhs, bool assumeUTF8) {
if (lhs == rhs) return true; // Early return
std::string lhsCharset = UnicodeUtil::getCharset(lhs);
std::string rhsCharset = UnicodeUtil::getCharset(rhs);;
icu::UnicodeString lhsUniString;
icu::UnicodeString rhsUniString;
if (lhsCharset != "UTF-8" && !assumeUTF8) {
lhsUniString = UnicodeUtil::getConverter(lhsCharset).convertToUTF8(lhs);
}
else lhsUniString = icu::UnicodeString::fromUTF8(lhs.data());
if (rhsCharset != "UTF-8" && !assumeUTF8) {
rhsUniString = UnicodeUtil::getConverter(rhsCharset).convertToUTF8(rhs);
}
else rhsUniString = icu::UnicodeString::fromUTF8(rhs.data());
int8_t result = lhsUniString.caseCompare(rhsUniString, U_FOLD_CASE_DEFAULT);
return (result == 0);
}
bool UnicodeUtil::isRTL(std::string_view str) {
bool _return = false;
icu::ErrorCode _unicodeError;
std::string charset(UnicodeUtil::getCharset(str));
icu::UnicodeString ustring = UnicodeUtil::getConverter(charset).convertToUTF8(str);
std::unique_ptr<UBiDi,void(*)(UBiDi*)> _uBiDiObj(
ubidi_open(),
[](UBiDi* p) {
if (p != nullptr) {
ubidi_close(p);
}
});
ubidi_setPara(
_uBiDiObj.get(),
ustring.getBuffer(),
-1,
UBIDI_DEFAULT_LTR,
nullptr,
_unicodeError
);
if (_unicodeError.isSuccess()) _return = (ubidi_getDirection(_uBiDiObj.get()) != UBIDI_LTR);
else {
std::clog << "unicode/warning: Error (" << std::to_string(_unicodeError.get()) << ": " << _unicodeError.errorName() << "), determining text direction for: " << str << ", will assume LTR." << std::endl;
}
return _return;
}
std::string UnicodeUtil::toLower (std::string_view str) {
return convertToUTF8 (str, "", CaseMapping::LOWER);
}
std::string UnicodeUtil::toUpper (std::string_view str) {
return convertToUTF8 (str, "", CaseMapping::UPPER);
}
std::string UnicodeUtil::toTitle (std::string_view str) {
return convertToUTF8 (str, "", CaseMapping::TITLE);
}
void UnicodeUtil::collate (songMetadata& stringmap) {
for (auto const& [key, value]: stringmap) {
ConfigItem::StringList termsToCollate = config["game/sorting_ignore"].sl();
std::string pattern = std::string ("^((");
for (auto term : termsToCollate) {
if (term != termsToCollate.front()) {
pattern += std::string("|");
}
pattern += term;
if (term == termsToCollate.back()) {
pattern += std::string(")\\s(.+))$");
}
}
std::string collatedString = regex_replace(convertToUTF8(value),
std::regex(pattern, std::regex_constants::icase), "$3,$2");
stringmap[key] = collatedString;
}
}
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