298 Source/Core/DolphinQt2/Translation.cpp
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@@ -0,0 +1,298 @@
// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#include "DolphinQt2/Translation.h"

#include <QApplication>
#include <QLocale>
#include <QMessageBox>
#include <QTranslator>
#include <algorithm>
#include <cstring>
#include <iterator>

#include "Common/File.h"
#include "Common/FileUtil.h"
#include "Common/Logging/Log.h"
#include "Common/MsgHandler.h"
#include "Common/StringUtil.h"
#include "Core/ConfigManager.h"

constexpr u32 MO_MAGIC_NUMBER = 0x950412de;

static u16 ReadU16(const char* data)
{
u16 value;
std::memcpy(&value, data, sizeof(value));
return value;
}

static u32 ReadU32(const char* data)
{
u32 value;
std::memcpy(&value, data, sizeof(value));
return value;
}

class MoIterator
{
public:
using iterator_category = std::random_access_iterator_tag;
using value_type = const char*;
using difference_type = s64;
using pointer = value_type;
using reference = value_type;

explicit MoIterator(const char* data, u32 table_offset, u32 index = 0)
: m_data{data}, m_table_offset{table_offset}, m_index{index}
{
}

// This is the actual underlying logic of accessing a Mo file. Patterned after the
// boost::iterator_facade library, which nicely separates out application logic from
// iterator-concept logic.
void advance(difference_type n) { m_index += n; }
difference_type distance_to(const MoIterator& other) const { return other.m_index - m_index; }
reference dereference() const
{
u32 offset = ReadU32(&m_data[m_table_offset + m_index * 8 + 4]);
return &m_data[offset];
}

// Needed for Iterator concept
reference operator*() const { return dereference(); }
MoIterator& operator++()
{
advance(1);
return *this;
}

// Needed for InputIterator concept
bool operator==(const MoIterator& other) const { return distance_to(other) == 0; }
bool operator!=(const MoIterator& other) const { return !(*this == other); }
pointer operator->() const { return dereference(); }
MoIterator operator++(int)
{
MoIterator tmp(*this);
advance(1);
return tmp;
}

// Needed for BidirectionalIterator concept
MoIterator& operator--()
{
advance(-1);
return *this;
}
MoIterator operator--(int)
{
MoIterator tmp(*this);
advance(-1);
return tmp;
}

// Needed for RandomAccessIterator concept
bool operator<(const MoIterator& other) const { return distance_to(other) > 0; }
bool operator<=(const MoIterator& other) const { return distance_to(other) >= 0; }
bool operator>(const MoIterator& other) const { return distance_to(other) < 0; }
bool operator>=(const MoIterator& other) const { return distance_to(other) <= 0; }
reference operator[](difference_type n) const { return *(*this + n); }
MoIterator& operator+=(difference_type n)
{
advance(n);
return *this;
}
MoIterator& operator-=(difference_type n)
{
advance(-n);
return *this;
}
friend MoIterator operator+(difference_type n, const MoIterator& it) { return it + n; }
friend MoIterator operator+(const MoIterator& it, difference_type n)
{
MoIterator tmp(it);
tmp += n;
return tmp;
}
difference_type operator-(const MoIterator& other) const { return other.distance_to(*this); }
friend MoIterator operator-(difference_type n, const MoIterator& it) { return it - n; }
friend MoIterator operator-(const MoIterator& it, difference_type n)
{
MoIterator tmp(it);
tmp -= n;
return tmp;
}

private:
const char* m_data;
u32 m_table_offset;
u32 m_index;
};

class MoFile
{
public:
MoFile() = default;
explicit MoFile(const std::string& filename)
{
File::IOFile file(filename, "rb");
m_data.resize(file.GetSize());
file.ReadBytes(m_data.data(), m_data.size());

if (!file)
{
ERROR_LOG(COMMON, "Error reading MO file '%s'", filename.c_str());
m_data = {};
return;
}

u32 magic = ReadU32(&m_data[0]);
if (magic != MO_MAGIC_NUMBER)
{
ERROR_LOG(COMMON, "MO file '%s' has bad magic number %x\n", filename.c_str(), magic);
m_data = {};
return;
}

u16 version_major = ReadU16(&m_data[4]);
if (version_major > 1)
{
ERROR_LOG(COMMON, "MO file '%s' has unsupported version number %i", filename.c_str(),
version_major);
m_data = {};
return;
}

m_number_of_strings = ReadU32(&m_data[8]);
m_offset_original_table = ReadU32(&m_data[12]);
m_offset_translation_table = ReadU32(&m_data[16]);
}

u32 GetNumberOfStrings() const { return m_number_of_strings; }
const char* Translate(const char* original_string) const
{
const MoIterator begin(m_data.data(), m_offset_original_table);
const MoIterator end(m_data.data(), m_offset_original_table, m_number_of_strings);
auto iter = std::lower_bound(begin, end, original_string,
[](const char* a, const char* b) { return strcmp(a, b) < 0; });

if (strcmp(*iter, original_string) != 0)
return original_string;

u32 offset = ReadU32(&m_data[m_offset_translation_table + std::distance(begin, iter) * 8 + 4]);
return &m_data[offset];
}

private:
std::vector<char> m_data;
u32 m_number_of_strings = 0;
u32 m_offset_original_table = 0;
u32 m_offset_translation_table = 0;
};

class MoTranslator : public QTranslator
{
public:
using QTranslator::QTranslator;

bool isEmpty() const override { return m_mo_file.GetNumberOfStrings() == 0; }
bool load(const std::string& filename)
{
m_mo_file = MoFile(filename);
return !isEmpty();
}

QString translate(const char* context, const char* source_text,
const char* disambiguation = nullptr, int n = -1) const override
{
return QString::fromUtf8(m_mo_file.Translate(source_text));
}

private:
MoFile m_mo_file;
};

QStringList FindPossibleLanguageCodes(const QString& exact_language_code)
{
QStringList possible_language_codes;
possible_language_codes << exact_language_code;

// Qt likes to separate language, script, and country by hyphen, but on disk they're separated by
// underscores.
possible_language_codes.replaceInStrings(QStringLiteral("-"), QStringLiteral("_"));

// Try successively dropping subtags (like the stock QTranslator, and as specified by RFC 4647
// "Matching of Language Tags").
// Example: fr_Latn_CA -> fr_Latn -> fr
for (auto lang : QStringList(possible_language_codes))
{
while (lang.contains(QLatin1Char('_')))
{
lang = lang.left(lang.lastIndexOf(QLatin1Char('_')));
possible_language_codes << lang;
}
}

// On macOS, Chinese (Simplified) and Chinese (Traditional) are represented as zh-Hans and
// zh-Hant, but on Linux they're represented as zh-CN and zh-TW. Qt should probably include the
// script subtags on Linux, but it doesn't.
if (possible_language_codes.contains(QStringLiteral("zh_Hans")))
possible_language_codes << QStringLiteral("zh_CN");
if (possible_language_codes.contains(QStringLiteral("zh_Hant")))
possible_language_codes << QStringLiteral("zh_TW");

return possible_language_codes;
}

static bool TryInstallTranslator(const QString& exact_language_code)
{
for (const auto& qlang : FindPossibleLanguageCodes(exact_language_code))
{
std::string lang = qlang.toStdString();
auto filename =
#if defined _WIN32
File::GetExeDirectory() + StringFromFormat("/Languages/%s/dolphin-emu.mo", lang.c_str())
#elif defined __APPLE__
File::GetBundleDirectory() +
StringFromFormat("/Contents/Resources/%s.lproj/dolphin-emu.mo", lang.c_str())
#else
StringFromFormat(DATA_DIR "/../locale/%s/LC_MESSAGES/dolphin-emu.mo", lang.c_str())
#endif
;

auto* translator = new MoTranslator(QApplication::instance());
if (translator->load(filename))
{
QApplication::instance()->installTranslator(translator);
return true;
}
translator->deleteLater();
}
return false;
}

void Translation::Initialize()
{
// Hook up Dolphin internal translation
RegisterStringTranslator([](const char* text) { return QObject::tr(text).toStdString(); });

// Hook up Qt translations
auto& configured_language = SConfig::GetInstance().m_InterfaceLanguage;
if (!configured_language.empty())
{
if (TryInstallTranslator(QString::fromStdString(configured_language)))
return;

QMessageBox::warning(
nullptr, QObject::tr("Error"),
QObject::tr("Error loading selected language. Falling back to system default."));
configured_language.clear();
}

for (const auto& lang : QLocale::system().uiLanguages())
{
if (TryInstallTranslator(lang))
break;
}
}
10 Source/Core/DolphinQt2/Translation.h
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// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

namespace Translation
{
void Initialize();
}
7 Source/Core/DolphinWX/Config/InterfaceConfigPane.cpp
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@@ -36,11 +36,10 @@
static const std::array<std::string, 29> language_ids{{
"",

"ms", "ca", "cs", "da", "de", "en", "es", "fr", "hr", "it", "hu", "nl",
"nb", // wxWidgets won't accept "no"
"pl", "pt", "pt_BR", "ro", "sr", "sv", "tr",
"ms", "ca", "cs", "da", "de", "en", "es", "fr", "hr", "it",
"hu", "nl", "nb", "pl", "pt", "pt_BR", "ro", "sr", "sv", "tr",

"el", "ru", "ar", "fa", "ko", "ja", "zh_CN", "zh_TW",
"el", "ru", "ar", "fa", "ko", "ja", "zh_CN", "zh_TW",
}};

InterfaceConfigPane::InterfaceConfigPane(wxWindow* parent, wxWindowID id) : wxPanel(parent, id)