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annotate src/gui/locale.cc @ 187:9613d72b097e

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*: multiple performance improvements like marking `static const` when it makes sense... date: change old stupid heap-based method to a structure which should make copying the thing actually make a copy. also many performance-based changes, like removing the std::tie dependency and forward-declaring nlohmann json *: replace every instance of QString::fromUtf8 to Strings::ToQString. the main difference is that our function will always convert exactly what is in the string, while some other times it would only convert up to the nearest NUL byte
author Paper <mrpapersonic@gmail.com>
date Wed, 06 Dec 2023 13:43:54 -0500
parents 39521c47c7a3
children 975a3f0965e2
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1 #include "gui/locale.h"
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2 #include "core/strings.h"
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3 #include <QTranslator>
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4 #include <QLocale>
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5 #include <QDir>
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6 #include <QString>
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7 #include <QApplication>
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8 #include <iostream>
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9
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10 namespace Locale {
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11
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12 std::string GetLocaleFullName(const QLocale& locale) {
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13 QString res = QLocale::languageToString(locale.language());
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14 if (locale.country() != QLocale::AnyCountry)
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15 res += " (" + QLocale::countryToString(locale.country()) + ")";
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16 return Strings::ToUtf8String(res);
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17 }
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19 Locale::Locale() {
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20 RefreshAvailableLocales();
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21
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22 /* default to en_US */
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23 if (!IsLocaleAvailable(QLocale()))
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24 SetActiveLocale(QLocale("en_US"));
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25 else /* TODO: is this needed? */
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26 SetActiveLocale(QLocale());
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27 }
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28
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29 Locale::Locale(const std::string& name) {
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30 RefreshAvailableLocales();
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31 SetActiveLocale(QLocale(Strings::ToQString(name)));
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32 }
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33
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34 QLocale Locale::GetLocale() const {
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35 return _locale;
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36 }
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37
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38 std::vector<QLocale> Locale::GetAvailableLocales() const {
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39 return _available_translations;
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40 }
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41
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42 void Locale::RefreshAvailableLocales() {
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43 _available_translations.clear();
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44
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45 /* we will always have en_US */
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46 _available_translations.push_back(QLocale("en_US"));
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47
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48 QDir dir(":/locale");
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49 if (!dir.exists())
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50 return;
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51
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52 QStringList translations = dir.entryList({"*.qm"}, QDir::Files);
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53
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54 _available_translations.reserve(translations.size());
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55 for (const QString& str : translations) {
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56 _available_translations.push_back(QLocale(str.mid(0, str.lastIndexOf("."))));
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57 }
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58 }
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60 bool Locale::IsLocaleAvailable(const QLocale& locale) const {
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61 for (const QLocale& l : _available_translations)
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62 if (l == locale)
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63 return true;
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64 return false;
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65 }
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66
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67 bool Locale::SetActiveLocale(const QLocale& locale) {
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68 if (!IsLocaleAvailable(locale))
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69 return false;
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70 if (_locale == locale)
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71 return true; /* we're... already on this locale :) */
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72
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73 _locale = locale;
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74 QLocale::setDefault(_locale);
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75
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76 /* we can still do stuff even if one thing fails! */
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77 bool return_value = true;
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78
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79 const QString name = _locale.name();
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80 if (!SwitchTranslator(_translator, QString(":/locale/%1.qm").arg(name)))
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81 return_value = false;
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82
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83 const QString path = qApp->applicationDirPath();
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84 if (!SwitchTranslator(_translator_qt, path + QString("/translations/qt_%1.qm").arg(name))) {
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85 /* Sometimes Qt will have proper translations for the language, but not the specific
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86 country. In that case, we still want to use that language. */
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87 const int underscore_index = name.lastIndexOf("_");
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88 if (!underscore_index)
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89 return false;
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90
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91 const QString short_name = name.mid(0, underscore_index);
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92 if (!SwitchTranslator(_translator_qt, path + QString("/translations/qt_%1.qm").arg(short_name)))
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93 return_value = false;
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94 }
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95
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96 return return_value;
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97 }
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98
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99 bool Locale::SwitchTranslator(QTranslator& translator, const QString& path) {
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100 qApp->removeTranslator(&translator);
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101
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102 if (!translator.load(path))
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103 return false;
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104
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105 qApp->installTranslator(&translator);
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106 return true;
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107 }
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109 }