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Add translation lookup for mimetype descriptions

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Extend QMimeType::comment() to support translations from .qm files as a
fallback when system-provided translations (e.g., shared-mime-info) are
unavailable.

Task-number: QTBUG-127004
Change-Id: I23060ab7a690c774691b2d96174e77a252c047ad
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 2edb56977309daff0e2bb92bb5f64f8e0ac47da9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Magdalena Stojek 2024-12-09 17:57:46 +01:00 committed by Qt Cherry-pick Bot
parent 753e0032dc
commit 4caff4f064
1 changed files with 20 additions and 23 deletions
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43
src/corelib/mimetypes/qmimetype.cpp
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@ -7,6 +7,7 @@
#include "qmimetype_p.h" #include "qmimetype_p.h"
#include "qmimedatabase_p.h" #include "qmimedatabase_p.h"
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug> #include <QtCore/QDebug>
#include <QtCore/QLocale> #include <QtCore/QLocale>
#include <QtCore/QHashFunctions> #include <QtCore/QHashFunctions>
@ -180,40 +181,36 @@ QString QMimeType::name() const
\property QMimeType::comment \property QMimeType::comment
\brief the description of the MIME type to be displayed on user interfaces \brief the description of the MIME type to be displayed on user interfaces
The default language (QLocale().name()) is used to select the appropriate translation. Returns a description for a MIME type, localized to the user's
current language settings.
While this property was introduced in 5.10, the While this property was introduced in 5.10, the
corresponding accessor method has always been there. corresponding accessor method has always been there.
*/ */
QString QMimeType::comment() const QString QMimeType::comment() const
{ {
const auto isEnUs = [](QStringView lang) {
// All synonyms of en_US, according to CLDR likely subtag rules:
static constexpr QLatin1StringView usaIsh[] =
{ "en_Latn_US"_L1, "en_US"_L1, "en_Latn"_L1, "en"_L1 };
return std::find(std::begin(usaIsh), std::end(usaIsh), lang) != std::end(usaIsh);
};
const auto localeComments = QMimeDatabasePrivate::instance()->localeComments(d->name); const auto localeComments = QMimeDatabasePrivate::instance()->localeComments(d->name);
const QStringList languageList = QLocale().uiLanguages(QLocale::TagSeparator::Underscore);
QStringList languageList = QLocale().uiLanguages(QLocale::TagSeparator::Underscore); QString comment = localeComments.value(u"default"_s);
qsizetype defaultIndex = languageList.indexOf(u"en_US"_s);
// Include the default locale as fall-back.
if (defaultIndex >= 0) {
// en_US is generally the default, and may be omitted from the
// overtly-named locales in the MIME type's data (QTBUG-105007).
++defaultIndex; // Skip over en_US.
// That's typically followed by en_Latn_US and en (in that order):
if (defaultIndex < languageList.size() && languageList.at(defaultIndex) == u"en_Latn_US")
++defaultIndex;
if (defaultIndex < languageList.size() && languageList.at(defaultIndex) == u"en")
++defaultIndex;
} else {
// Absent en-US, just append it:
defaultIndex = languageList.size();
}
languageList.insert(defaultIndex, u"default"_s);
for (const QString &language : std::as_const(languageList)) { for (const QString &language : std::as_const(languageList)) {
const QString lang = language == "C"_L1 ? u"en_US"_s : language; const QString lang = language == "C"_L1 ? u"en_US"_s : language;
QString comm = localeComments.value(lang); QString translated = localeComments.value(lang);
if (!comm.isEmpty()) if (!translated.isEmpty())
return comm; return translated;
if (!comment.isEmpty() && isEnUs(lang))
return comment; // The default entry is assumed to be in en-US
} }
QString translated =
QCoreApplication::translate("QMimeType", comment.toUtf8().constData());
if (!translated.isEmpty())
return translated;
// Use the mimetype name as fallback // Use the mimetype name as fallback
return d->name; return d->name;