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annotate src/gui/locale.cc @ 336:d260549151d6

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dep/animone: fix undefined behavior, get correct length value
author Paper <paper@paper.us.eu.org>
date Wed, 19 Jun 2024 06:32:25 -0400
parents b1f625b0227c
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1 #include "gui/locale.h"
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2 #include "core/strings.h"
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3
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4 #include <QApplication>
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5 #include <QDir>
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6 #include <QLocale>
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7 #include <QString>
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8 #include <QTranslator>
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9
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10 #include <QtGlobal>
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11
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12 namespace Locale {
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13
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14 std::string GetLocaleFullName(const QLocale& locale) {
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15 QString res = QLocale::languageToString(locale.language());
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16 #if QT_VERSION >= QT_VERSION_CHECK(6, 2, 0)
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17 /* silence deprecation warning for locale.country() */
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18 if (locale.territory() != QLocale::AnyTerritory)
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19 res += " (" + QLocale::territoryToString(locale.territory()) + ")";
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20 #else
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21 if (locale.country() != QLocale::AnyCountry)
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22 res += " (" + QLocale::countryToString(locale.country()) + ")";
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23 #endif
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24 return Strings::ToUtf8String(res);
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25 }
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26
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27 Locale::Locale() {
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28 RefreshAvailableLocales();
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29 SetActiveLocale(QLocale("en_US"));
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30 }
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31
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32 Locale::Locale(const std::string& name) {
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33 RefreshAvailableLocales();
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34 SetActiveLocale(QLocale(Strings::ToQString(name)));
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35 }
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36
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37 QLocale Locale::GetLocale() const {
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38 return _locale;
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39 }
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40
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41 std::vector<QLocale> Locale::GetAvailableLocales() const {
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42 return _available_translations;
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43 }
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44
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45 void Locale::RefreshAvailableLocales() {
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46 _available_translations.clear();
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47
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48 /* we will always have en_US */
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49 _available_translations.push_back(QLocale("en_US"));
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50
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51 QDir dir(":/locale");
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52 if (!dir.exists())
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53 return;
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54
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55 QStringList translations = dir.entryList({"*.qm"}, QDir::Files);
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56
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57 _available_translations.reserve(translations.size());
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58 for (const QString& str : translations)
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59 _available_translations.push_back(QLocale(str.mid(0, str.lastIndexOf("."))));
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60 }
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61
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62 bool Locale::IsLocaleAvailable(const QLocale& locale) const {
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63 for (const QLocale& l : _available_translations)
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64 if (l == locale)
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65 return true;
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66 return false;
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67 }
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68
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69 bool Locale::SetActiveLocale(const QLocale& locale) {
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70 if (!IsLocaleAvailable(locale) || !qApp)
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71 return false;
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72
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73 if (_locale == locale)
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74 return true; /* we're... already on this locale :) */
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75
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76 _locale = locale;
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77 QLocale::setDefault(_locale);
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78
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79 /* we can still do stuff even if one thing fails! */
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80 bool return_value = true;
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81
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82 const QString name = _locale.name();
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83 if (!SwitchTranslator(_translator, QString(":/locale/%1.qm").arg(name)))
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84 return_value = false;
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85
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86 const QString path = qApp->applicationDirPath();
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87 if (!SwitchTranslator(_translator_qt, path + QString("/translations/qt_%1.qm").arg(name))) {
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88 /* Sometimes Qt will have proper translations for the language, but not the specific
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89 * country. In that case, we still want to use that language. */
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90 const int underscore_index = name.lastIndexOf("_");
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91 if (!underscore_index)
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92 return false;
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93
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94 const QString short_name = name.mid(0, underscore_index);
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95 if (!SwitchTranslator(_translator_qt, path + QString("/translations/qt_%1.qm").arg(short_name)))
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96 return_value = false;
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97 }
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98
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99 return return_value;
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100 }
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101
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102 bool Locale::SwitchTranslator(QTranslator& translator, const QString& path) {
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103 qApp->removeTranslator(&translator);
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104
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105 if (!translator.load(path))
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106 return false;
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107
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108 qApp->installTranslator(&translator);
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109 return true;
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110 }
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111
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112 } // namespace Locale