1 files changed, 114 insertions, 0 deletions
diff --git a/src/plugins/qmltooling/qmldbg_preview/proxytranslator.cpp b/src/plugins/qmltooling/qmldbg_preview/proxytranslator.cpp
new file mode 100644
index 0000000000..cc773fc3f2
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_preview/proxytranslator.cpp
@@ -0,0 +1,114 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "proxytranslator.h"
+
+#include <QtCore/qlibraryinfo.h>
+
+QT_BEGIN_NAMESPACE
+
+void ProxyTranslator::addEngine(QQmlEngine *engine)
+{
+    m_engines.append(engine);
+}
+
+void ProxyTranslator::removeEngine(QQmlEngine *engine)
+{
+    m_engines.removeOne(engine);
+}
+
+bool ProxyTranslator::hasTranslation(const TranslationBindingInformation &translationBindingInformation) const
+{
+    resetTranslationFound();
+    translationFromInformation(translationBindingInformation);
+    return translationFound();
+}
+
+QString ProxyTranslator::translationFromInformation(const TranslationBindingInformation &info)
+{
+    return info.translation.translate();
+}
+
+QQmlSourceLocation ProxyTranslator::sourceLocationFromInformation(const TranslationBindingInformation &translationBindingInformation)
+{
+    return QQmlSourceLocation(translationBindingInformation.compilationUnit->fileName(),
+                              translationBindingInformation.line,
+                              translationBindingInformation.column);
+}
+
+
+void ProxyTranslator::setLanguage(const QUrl &context, const QLocale &locale)
+{
+    m_enable = true;
+    m_currentUILanguages = locale.uiLanguages().join(QLatin1Char(' '));
+
+    m_qtTranslator.reset(new QTranslator());
+    if (!m_qtTranslator->load(locale, QLatin1String("qt"), QLatin1String("_"),
+                              QLibraryInfo::path(QLibraryInfo::TranslationsPath))) {
+        m_qtTranslator.reset();
+    }
+
+    m_qmlTranslator.reset(new QTranslator(this));
+    if (!m_qmlTranslator->load(locale, QLatin1String("qml"), QLatin1String("_"),
+                              context.toLocalFile() + QLatin1String("/i18n"))) {
+        m_qmlTranslator.reset();
+    }
+
+    // unfortunately setUiLanguage set new translators, so do this first
+    for (QQmlEngine *engine : std::as_const(m_engines))
+        engine->setUiLanguage(locale.bcp47Name());
+
+    // make sure proxy translator is the first used translator
+    QCoreApplication::removeTranslator(this);
+    QCoreApplication::installTranslator(this);
+
+    for (QQmlEngine *engine : std::as_const(m_engines)) {
+        // have two retranslate runs to get elided warning even the same language was set
+        m_enable = false;
+        engine->retranslate();
+        m_enable = true;
+        engine->retranslate();
+    }
+    emit languageChanged(locale);
+}
+
+QString ProxyTranslator::translate(const char *context, const char *sourceText, const char *disambiguation, int n) const
+{
+    if (!m_enable)
+        return {};
+    QString result;
+    if (result.isNull() && m_qtTranslator)
+        result = m_qtTranslator->translate(context, sourceText, disambiguation, n);
+    if (result.isNull() && m_qmlTranslator)
+        result = m_qmlTranslator->translate(context, sourceText, disambiguation, n);
+    m_translationFound = !(result.isNull() || result.isEmpty() || result == sourceText);
+    return result;
+}
+
+void ProxyTranslator::resetTranslationFound() const
+{
+    m_translationFound = false;
+}
+
+bool ProxyTranslator::translationFound() const
+{
+    return m_translationFound;
+}
+
+bool ProxyTranslator::isEmpty() const
+{
+    if (m_qtTranslator && m_qtTranslator->isEmpty())
+        return false;
+    if (m_qmlTranslator && m_qmlTranslator->isEmpty())
+        return false;
+    return true;
+}
+
+QString ProxyTranslator::currentUILanguages() const
+{
+    return m_currentUILanguages;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_proxytranslator.cpp"