qmlproject: rename lastUsedLanguage -> currentLocale

removed the connection from plugin to
QmlMultiLanguageAspect::setCurrentLocale
but calling it directly in QmlPreviewPlugin::setLocale

Does not matter which method is called it will change the right
thing only once because it is checking if it already have the
set locale.

Change-Id: I6cb4b115788adc103481dcda45e3214a0cd73401
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp

@@ -547,7 +547,7 @@ void NodeInstanceView::auxiliaryDataChanged(const ModelNode &node,
     } else if (node.isRootNode() && name == "language@Internal") {
         const QString languageAsString = value.toString();
         if (auto multiLanguageAspect = QmlProjectManager::QmlMultiLanguageAspect::current(m_currentTarget))
-            multiLanguageAspect->setLastUsedLanguage(languageAsString);
+            multiLanguageAspect->setCurrentLocale(languageAsString);
         nodeInstanceServer()->changeLanguage({languageAsString});
     } else if (node.isRootNode() && name == "previewSize@Internal") {
         nodeInstanceServer()->changePreviewImageSize(value.toSize());
@@ -991,7 +991,7 @@ CreateSceneCommand NodeInstanceView::createCreateSceneCommand()
 
     QString lastUsedLanguage;
     if (auto multiLanguageAspect = QmlProjectManager::QmlMultiLanguageAspect::current(m_currentTarget))
-        lastUsedLanguage = multiLanguageAspect->lastUsedLanguage();
+        lastUsedLanguage = multiLanguageAspect->currentLocale();
 
     return CreateSceneCommand(
                 instanceContainerList,

src/plugins/qmlpreview/qmlpreviewplugin.cpp

@@ -193,7 +193,10 @@ QmlPreviewPluginPrivate::QmlPreviewPluginPrivate(QmlPreviewPlugin *parent)
     action->setEnabled(SessionManager::startupProject() != nullptr);
     connect(SessionManager::instance(), &SessionManager::startupProjectChanged, action,
             &QAction::setEnabled);
-    connect(action, &QAction::triggered, this, []() {
+    connect(action, &QAction::triggered, this, [this]() {
+        if (auto multiLanguageAspect = QmlProjectManager::QmlMultiLanguageAspect::current())
+            m_locale = multiLanguageAspect->currentLocale();
+
         ProjectExplorerPlugin::runStartupProject(Constants::QML_PREVIEW_RUN_MODE);
     });
     menu->addAction(Core::ActionManager::registerAction(action, "QmlPreview.Internal"),
@@ -334,6 +337,8 @@ QString QmlPreviewPlugin::locale() const
 
 void QmlPreviewPlugin::setLocale(const QString &locale)
 {
+    if (auto multiLanguageAspect = QmlProjectManager::QmlMultiLanguageAspect::current())
+        multiLanguageAspect->setCurrentLocale(locale);
     if (d->m_locale == locale)
         return;
 

src/plugins/qmlprojectmanager/qmlmultilanguageaspect.cpp

@@ -83,27 +83,24 @@ QmlMultiLanguageAspect::QmlMultiLanguageAspect(ProjectExplorer::Target *target)
     setDefaultValue(!databaseFilePath().isEmpty());
     QVariantMap getDefaultValues;
     fromMap(getDefaultValues);
-
-    if (auto previewPlugin = getPreviewPlugin())
-        connect(previewPlugin, SIGNAL(localeChanged(QString)), this, SLOT(setLastUsedLanguage(QString)));
 }
 
 QmlMultiLanguageAspect::~QmlMultiLanguageAspect()
 {
 }
 
-void QmlMultiLanguageAspect::setLastUsedLanguage(const QString &language)
+void QmlMultiLanguageAspect::setCurrentLocale(const QString &locale)
 {
+    if (m_currentLocale == locale)
+        return;
+    m_currentLocale = locale;
     if (auto previewPlugin = getPreviewPlugin())
-        previewPlugin->setProperty("locale", language);
-    if (m_lastUsedLanguage != language) {
-        m_lastUsedLanguage = language;
-    }
+        previewPlugin->setProperty("locale", locale);
 }
 
-QString QmlMultiLanguageAspect::lastUsedLanguage() const
+QString QmlMultiLanguageAspect::currentLocale() const
 {
-    return m_lastUsedLanguage;
+    return m_currentLocale;
 }
 
 Utils::FilePath QmlMultiLanguageAspect::databaseFilePath() const
@@ -116,14 +113,14 @@ Utils::FilePath QmlMultiLanguageAspect::databaseFilePath() const
 void QmlMultiLanguageAspect::toMap(QVariantMap &map) const
 {
     BaseBoolAspect::toMap(map);
-    if (!m_lastUsedLanguage.isEmpty())
-        map.insert(Constants::LAST_USED_LANGUAGE, m_lastUsedLanguage);
+    if (!m_currentLocale.isEmpty())
+        map.insert(Constants::LAST_USED_LANGUAGE, m_currentLocale);
 }
 
 void QmlMultiLanguageAspect::fromMap(const QVariantMap &map)
 {
     BaseBoolAspect::fromMap(map);
-    setLastUsedLanguage(map.value(Constants::LAST_USED_LANGUAGE, "en").toString());
+    setCurrentLocale(map.value(Constants::LAST_USED_LANGUAGE, "en").toString());
 }
 
 QmlMultiLanguageAspect *QmlMultiLanguageAspect::current()

src/plugins/qmlprojectmanager/qmlmultilanguageaspect.h

@@ -40,7 +40,8 @@ public:
     explicit QmlMultiLanguageAspect(ProjectExplorer::Target *target);
     ~QmlMultiLanguageAspect() override;
 
-    QString lastUsedLanguage() const;
+    QString currentLocale() const;
+    void setCurrentLocale(const QString &locale);
     Utils::FilePath databaseFilePath() const;
     void toMap(QVariantMap &map) const final;
     void fromMap(const QVariantMap &map) final;
@@ -49,13 +50,13 @@ public:
     static QmlMultiLanguageAspect *current(ProjectExplorer::Project *project);
     static QmlMultiLanguageAspect *current(ProjectExplorer::Target *target);
 
-public slots:
-    void setLastUsedLanguage(const QString &language);
+signals:
+    void currentLocaleChanged(const QString &locale);
 
 private:
     ProjectExplorer::Target *m_target = nullptr;
     mutable Utils::FilePath m_databaseFilePath;
-    QString m_lastUsedLanguage;
+    QString m_currentLocale;
 };
 
 } // namespace QmlProjectManager

src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp

@@ -117,7 +117,7 @@ QmlProjectRunConfiguration::QmlProjectRunConfiguration(Target *target, Id id)
 
         if (m_multiLanguageAspect && m_multiLanguageAspect->value() && !m_multiLanguageAspect->databaseFilePath().isEmpty()) {
             env.set("QT_MULTILANGUAGE_DATABASE", m_multiLanguageAspect->databaseFilePath().toString());
-            env.set("QT_MULTILANGUAGE_LANGUAGE", m_multiLanguageAspect->lastUsedLanguage());
+            env.set("QT_MULTILANGUAGE_LANGUAGE", m_multiLanguageAspect->currentLocale());
         } else {
             env.unset("QT_MULTILANGUAGE_DATABASE");
             env.unset("QT_MULTILANGUAGE_LANGUAGE");