[locale] Sanitize Config signals and slots

- remove the weirdly-structured prettyStatus and similar:
  the Config object has human-readable status strings (three,
  for location, language, and LC-formats) which can be
  normal properties with signals.
- Implement prettyStatus in the view step by querying the Config.

src/modules/locale/Config.cpp

@@ -192,6 +192,7 @@ Config::setCurrentLocation( const CalamaresUtils::Locale::TZZone* location )
         if ( !m_selectedLocaleConfiguration.explicit_lang )
         {
             m_selectedLocaleConfiguration.setLanguage( newLocale.language() );
+            emit currentLanguageStatusChanged( currentLanguageStatus() );
         }
         if ( !m_selectedLocaleConfiguration.explicit_lc )
         {
@@ -204,6 +205,8 @@ Config::setCurrentLocation( const CalamaresUtils::Locale::TZZone* location )
             m_selectedLocaleConfiguration.lc_telephone = newLocale.lc_telephone;
             m_selectedLocaleConfiguration.lc_measurement = newLocale.lc_measurement;
             m_selectedLocaleConfiguration.lc_identification = newLocale.lc_identification;
+
+            emit currentLCStatusChanged( currentLCStatus() );
         }
         emit currentLocationChanged( m_currentLocation );
     }
@@ -228,6 +231,8 @@ Config::setLanguageExplicitly( const QString& language )
 {
     m_selectedLocaleConfiguration.setLanguage( language );
     m_selectedLocaleConfiguration.explicit_lang = true;
+
+    emit currentLanguageStatusChanged( currentLanguageStatus() );
 }
 
 void
@@ -244,33 +249,37 @@ Config::setLCLocaleExplicitly( const QString& locale )
     m_selectedLocaleConfiguration.lc_measurement = locale;
     m_selectedLocaleConfiguration.lc_identification = locale;
     m_selectedLocaleConfiguration.explicit_lc = true;
+
+    emit currentLCStatusChanged( currentLCStatus() );
 }
 
-std::pair< QString, QString >
-Config::prettyLocaleStatus() const
+QString
+Config::currentLocationStatus() const
 {
-    using CalamaresUtils::Locale::Label;
+    return tr( "Set timezone to %1/%2." ).arg( m_currentLocation->region(), m_currentLocation->zone() );
+}
 
-    Label lang( m_selectedLocaleConfiguration.language(), Label::LabelFormat::AlwaysWithCountry );
-    Label num( m_selectedLocaleConfiguration.lc_numeric, Label::LabelFormat::AlwaysWithCountry );
+static inline QString
+localeLabel( const QString& s )
+{
+    using CalamaresUtils::Locale::Label;
 
-    return std::make_pair< QString, QString >(
-        tr( "The system language will be set to %1." ).arg( lang.label() ),
-        tr( "The numbers and dates locale will be set to %1." ).arg( num.label() ) );
+    Label lang( s, Label::LabelFormat::AlwaysWithCountry );
+    return lang.label();
 }
 
 QString
-Config::prettyStatus() const
+Config::currentLanguageStatus() const
 {
-    QString br( QStringLiteral("<br/>"));
-    QString status;
-    status += tr( "Set timezone to %1/%2." ).arg( m_currentLocation->region(), m_currentLocation->zone() ) + br;
-
-    auto labels = prettyLocaleStatus();
-    status += labels.first + br;
-    status += labels.second + br;
+    return tr( "The system language will be set to %1." )
+        .arg( localeLabel( m_selectedLocaleConfiguration.language() ) );
+}
 
-    return status;
+QString
+Config::currentLCStatus() const
+{
+    return tr( "The numbers and dates locale will be set to %1." )
+        .arg( localeLabel( m_selectedLocaleConfiguration.lc_numeric ) );
 }
 
 

src/modules/locale/Config.h

@@ -36,10 +36,14 @@ class Config : public QObject
     Q_PROPERTY( const QStringList& supportedLocales READ supportedLocales CONSTANT FINAL )
     Q_PROPERTY( CalamaresUtils::Locale::CStringListModel* zonesModel READ zonesModel CONSTANT FINAL )
     Q_PROPERTY( CalamaresUtils::Locale::CStringListModel* regionModel READ regionModel CONSTANT FINAL )
-    Q_PROPERTY( const CalamaresUtils::Locale::CStringPairList& timezoneData READ timezoneData CONSTANT FINAL )
+
     Q_PROPERTY( const CalamaresUtils::Locale::TZZone* currentLocation READ currentLocation WRITE setCurrentLocation
                     NOTIFY currentLocationChanged )
 
+    Q_PROPERTY( QString currentLocationStatus READ currentLocationStatus NOTIFY currentLanguageStatusChanged )
+    Q_PROPERTY( QString currentLanguageStatus READ currentLanguageStatus NOTIFY currentLanguageStatusChanged )
+    Q_PROPERTY( QString currentLCStatus READ currentLCStatus NOTIFY currentLCStatusChanged )
+
 public:
     Config( QObject* parent = nullptr );
     ~Config();
@@ -47,25 +51,37 @@ public:
     void setConfigurationMap( const QVariantMap& );
     Calamares::JobList createJobs();
 
-    /** @brief Human-readable status for language and LC
-     *
-     * For the current locale config, return two strings describing
-     * the settings for language and numbers.
-     */
-    std::pair< QString, QString > prettyLocaleStatus() const;
-    /** @brief Human-readable zone, language and LC status
+    // Underlying data for the models
+    const CalamaresUtils::Locale::CStringPairList& timezoneData() const;
+
+    /** @brief The currently selected location (timezone)
      *
-     * Concatenates all three strings with <br/>
+     * The location is a pointer into the date that timezoneData() returns.
+     * It is possible to return nullptr, if no location has been picked yet.
      */
-    QString prettyStatus() const;
+    const CalamaresUtils::Locale::TZZone* currentLocation() const { return m_currentLocation; }
 
+    /// locale configuration (LC_* and LANG) based solely on the current location.
+    LocaleConfiguration automaticLocaleConfiguration() const;
+    /// locale configuration that takes explicit settings into account
+    LocaleConfiguration localeConfiguration() const;
+
+    /// The human-readable description of what timezone is used
+    QString currentLocationStatus() const;
+    /// The human-readable description of what language is used
+    QString currentLanguageStatus() const;
+    /// The human-readable description of what locale (LC_*) is used
+    QString currentLCStatus() const;
 
-public Q_SLOTS:
     const QStringList& supportedLocales() const { return m_localeGenLines; }
     CalamaresUtils::Locale::CStringListModel* regionModel() const { return m_regionModel.get(); }
     CalamaresUtils::Locale::CStringListModel* zonesModel() const { return m_zonesModel.get(); }
-    // Underlying data for the models
-    const CalamaresUtils::Locale::CStringPairList& timezoneData() const;
+
+public Q_SLOTS:
+    /// Set a language by user-choice, overriding future location changes
+    void setLanguageExplicitly( const QString& language );
+    /// Set LC (formats) by user-choice, overriding future location changes
+    void setLCLocaleExplicitly( const QString& locale );
 
     /** @brief Sets a location by name
      *
@@ -82,25 +98,11 @@ public Q_SLOTS:
      */
     void setCurrentLocation( const CalamaresUtils::Locale::TZZone* location );
 
-    /** @brief The currently selected location (timezone)
-     *
-     * The location is a pointer into the date that timezoneData() returns.
-     * It is possible to return nullptr, if no location has been picked yet.
-     */
-    const CalamaresUtils::Locale::TZZone* currentLocation() const { return m_currentLocation; }
-
-    /// locale configuration (LC_* and LANG) based solely on the current location.
-    LocaleConfiguration automaticLocaleConfiguration() const;
-    /// locale configuration that takes explicit settings into account
-    LocaleConfiguration localeConfiguration() const;
-
-    /// Set a language by user-choice, overriding future location changes
-    void setLanguageExplicitly( const QString& language );
-    /// Set LC (formats) by user-choice, overriding future location changes
-    void setLCLocaleExplicitly( const QString& locale );
-
 signals:
-    void currentLocationChanged( const CalamaresUtils::Locale::TZZone* location );
+    void currentLocationChanged( const CalamaresUtils::Locale::TZZone* location ) const;
+    void currentLocationStatusChanged( const QString& ) const;
+    void currentLanguageStatusChanged( const QString& ) const;
+    void currentLCStatusChanged( const QString& ) const;
 
 private:
     /// A list of supported locale identifiers (e.g. "en_US.UTF-8")

src/modules/locale/LocalePage.cpp

@@ -106,6 +106,8 @@ LocalePage::LocalePage( Config* config, QWidget* parent )
     setMinimumWidth( m_tzWidget->width() );
     setLayout( mainLayout );
 
+    connect( config, &Config::currentLCStatusChanged, m_formatsLabel, &QLabel::setText );
+    connect( config, &Config::currentLanguageStatusChanged, m_localeLabel, &QLabel::setText );
     connect( config, &Config::currentLocationChanged, m_tzWidget, &TimeZoneWidget::setCurrentLocation );
     connect( config, &Config::currentLocationChanged, this, &LocalePage::locationChanged );
     connect( m_tzWidget,
@@ -137,14 +139,11 @@ LocalePage::updateLocaleLabels()
     m_zoneLabel->setText( tr( "Zone:" ) );
     m_localeChangeButton->setText( tr( "&Change..." ) );
     m_formatsChangeButton->setText( tr( "&Change..." ) );
-
-    auto labels = m_config->prettyLocaleStatus();
-    m_localeLabel->setText( labels.first );
-    m_formatsLabel->setText( labels.second );
+    m_localeLabel->setText( m_config->currentLanguageStatus() );
+    m_formatsLabel->setText( m_config->currentLCStatus() );
 }
 
 
-
 void
 LocalePage::onActivate()
 {

src/modules/locale/LocaleViewStep.cpp

@@ -104,7 +104,8 @@ LocaleViewStep::prettyName() const
 QString
 LocaleViewStep::prettyStatus() const
 {
-    return m_prettyStatus;
+    QStringList l { m_config->currentLocationStatus(), m_config->currentLanguageStatus(), m_config->currentLCStatus() };
+    return l.join( QStringLiteral( "<br/>" ) );
 }
 
 
@@ -167,7 +168,6 @@ LocaleViewStep::onLeave()
     if ( m_actualWidget )
     {
         m_jobs = m_config->createJobs();
-        m_prettyStatus = m_config->prettyStatus();
 
         auto map = m_config->localeConfiguration().toMap();
         QVariantMap vm;

src/modules/locale/LocaleViewStep.h

@@ -70,7 +70,6 @@ private:
 
     LocalePage* m_actualWidget;
     bool m_nextEnabled;
-    QString m_prettyStatus;
 
     Calamares::JobList m_jobs;