Implement system locale for Android

On Android, we would default to C locale always. We need a connection
to Java in order to get the locale, so this has to be done in the
platform plugin rather than the QtCore library. It's enough to
instantiate the QSystemLocale subclass, since this will automatically
register itself as the current system locale.

Task-number: QTBUG-31651
Change-Id: I76f3e30f7dff90e8101cb560cee2b96c9300d9af
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

src/corelib/tools/qlocale_p.h

@@ -62,7 +62,7 @@
 QT_BEGIN_NAMESPACE
 
 #ifndef QT_NO_SYSTEMLOCALE
-class QSystemLocale
+class Q_CORE_EXPORT QSystemLocale
 {
 public:
     QSystemLocale();

src/plugins/platforms/android/src/qandroidplatformintegration.cpp

@@ -66,6 +66,7 @@
 #endif
 
 #include "qandroidplatformtheme.h"
+#include "qandroidsystemlocale.h"
 
 QT_BEGIN_NAMESPACE
 
@@ -108,6 +109,8 @@ QAndroidPlatformIntegration::QAndroidPlatformIntegration(const QStringList &para
     m_androidFDB = new QAndroidPlatformFontDatabase();
     m_androidPlatformServices = new QAndroidPlatformServices();
     m_androidPlatformClipboard = new QAndroidPlatformClipboard();
+
+    m_androidSystemLocale = new QAndroidSystemLocale;
 }
 
 bool QAndroidPlatformIntegration::hasCapability(Capability cap) const
@@ -183,6 +186,7 @@ QAndroidPlatformIntegration::~QAndroidPlatformIntegration()
 {
     delete m_androidPlatformNativeInterface;
     delete m_androidFDB;
+    delete m_androidSystemLocale;
     QtAndroid::setAndroidPlatformIntegration(NULL);
 }
 QPlatformFontDatabase *QAndroidPlatformIntegration::fontDatabase() const

src/plugins/platforms/android/src/qandroidplatformintegration.h

@@ -60,6 +60,7 @@ QT_BEGIN_NAMESPACE
 
 class QDesktopWidget;
 class QAndroidPlatformServices;
+class QAndroidSystemLocale;
 
 #ifdef ANDROID_PLUGIN_OPENGL
 class QAndroidOpenGLPlatformWindow;
@@ -152,6 +153,7 @@ private:
     QAndroidPlatformNativeInterface *m_androidPlatformNativeInterface;
     QAndroidPlatformServices *m_androidPlatformServices;
     QPlatformClipboard *m_androidPlatformClipboard;
+    QAndroidSystemLocale *m_androidSystemLocale;
 
     mutable QAndroidInputContext m_platformInputContext;
 };

src/plugins/platforms/android/src/qandroidsystemlocale.cpp

@@ -0,0 +1,179 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qandroidsystemlocale.h"
+#include "androidjnimain.h"
+#include "private/qjniobject_p.h"
+#include "private/qjnihelpers_p.h"
+#include "qdatetime.h"
+#include "qstringlist.h"
+#include "qvariant.h"
+
+QT_BEGIN_NAMESPACE
+
+QAndroidSystemLocale::QAndroidSystemLocale() : m_locale(QLocale::C)
+{
+}
+
+void QAndroidSystemLocale::getLocaleFromJava() const
+{
+    QWriteLocker locker(&m_lock);
+
+    QJNILocalRef<jobject> javaLocaleRef;
+    QJNIObject javaActivity(QtAndroid::activity());
+    if (javaActivity.isValid()) {
+        QJNIObject resources(javaActivity.callObjectMethod<jobject>("getResources", "()Landroid/content/res/Resources;").object());
+        QJNIObject configuration(resources.callObjectMethod<jobject>("getConfiguration", "()Landroid/content/res/Configuration;").object());
+
+        javaLocaleRef = configuration.getObjectField<jobject>("locale", "Ljava/util/Locale;");
+    } else {
+        javaLocaleRef = QJNIObject::callStaticObjectMethod<jobject>("java/util/Locale", "getDefault", "()Ljava/util/Locale;");
+    }
+
+    QJNIObject javaLocaleObject(javaLocaleRef.object());
+    QString languageCode = qt_convertJString(javaLocaleObject.callObjectMethod<jstring>("getLanguage", "()Ljava/lang/String;").object());
+    QString countryCode = qt_convertJString(javaLocaleObject.callObjectMethod<jstring>("getCountry", "()Ljava/lang/String;").object());
+
+    m_locale = QLocale(languageCode + QLatin1Char('_') + countryCode);
+}
+
+QVariant QAndroidSystemLocale::query(QueryType type, QVariant in) const
+{
+    if (type == LocaleChanged) {
+        getLocaleFromJava();
+        return QVariant();
+    }
+
+    QReadLocker locker(&m_lock);
+
+    switch (type) {
+    case DecimalPoint:
+        return m_locale.decimalPoint();
+    case GroupSeparator:
+        return m_locale.groupSeparator();
+    case ZeroDigit:
+        return m_locale.zeroDigit();
+    case NegativeSign:
+        return m_locale.negativeSign();
+    case DateFormatLong:
+        return m_locale.dateFormat(QLocale::LongFormat);
+    case DateFormatShort:
+        return m_locale.dateFormat(QLocale::ShortFormat);
+    case TimeFormatLong:
+        return m_locale.timeFormat(QLocale::LongFormat);
+    case TimeFormatShort:
+        return m_locale.timeFormat(QLocale::ShortFormat);
+    case DayNameLong:
+        return m_locale.dayName(in.toInt(), QLocale::LongFormat);
+    case DayNameShort:
+        return m_locale.dayName(in.toInt(), QLocale::ShortFormat);
+    case MonthNameLong:
+        return m_locale.monthName(in.toInt(), QLocale::LongFormat);
+    case MonthNameShort:
+        return m_locale.monthName(in.toInt(), QLocale::ShortFormat);
+    case StandaloneMonthNameLong:
+        return m_locale.standaloneMonthName(in.toInt(), QLocale::LongFormat);
+    case StandaloneMonthNameShort:
+        return m_locale.standaloneMonthName(in.toInt(), QLocale::ShortFormat);
+    case DateToStringLong:
+        return m_locale.toString(in.toDate(), QLocale::LongFormat);
+    case DateToStringShort:
+        return m_locale.toString(in.toDate(), QLocale::ShortFormat);
+    case TimeToStringLong:
+        return m_locale.toString(in.toTime(), QLocale::LongFormat);
+    case TimeToStringShort:
+        return m_locale.toString(in.toTime(), QLocale::ShortFormat);
+    case DateTimeFormatLong:
+        return m_locale.dateTimeFormat(QLocale::LongFormat);
+    case DateTimeFormatShort:
+        return m_locale.dateTimeFormat(QLocale::ShortFormat);
+    case DateTimeToStringLong:
+        return m_locale.toString(in.toDateTime(), QLocale::LongFormat);
+    case DateTimeToStringShort:
+        return m_locale.toString(in.toDateTime(), QLocale::ShortFormat);
+    case PositiveSign:
+        return m_locale.positiveSign();
+    case AMText:
+        return m_locale.amText();
+    case PMText:
+        return m_locale.pmText();
+    case FirstDayOfWeek:
+        return m_locale.firstDayOfWeek();
+    case CurrencySymbol:
+        return m_locale .currencySymbol(QLocale::CurrencySymbolFormat(in.toUInt()));
+    case CurrencyToString: {
+        switch (in.type()) {
+        case QVariant::Int:
+            return m_locale .toCurrencyString(in.toInt());
+        case QVariant::UInt:
+            return m_locale .toCurrencyString(in.toUInt());
+        case QVariant::Double:
+            return m_locale .toCurrencyString(in.toDouble());
+        case QVariant::LongLong:
+            return m_locale .toCurrencyString(in.toLongLong());
+        case QVariant::ULongLong:
+            return m_locale .toCurrencyString(in.toULongLong());
+        default:
+            break;
+        }
+        return QString();
+    }
+    case StringToStandardQuotation:
+        return m_locale.quoteString(in.value<QStringRef>());
+    case StringToAlternateQuotation:
+        return m_locale.quoteString(in.value<QStringRef>(), QLocale::AlternateQuotation);
+    case ListToSeparatedString:
+        return m_locale.createSeparatedList(in.value<QStringList>());
+    case LocaleChanged:
+        Q_ASSERT_X(false, Q_FUNC_INFO, "This can't happen.");
+    default:
+        break;
+    }
+    return QVariant();
+}
+
+QLocale QAndroidSystemLocale::fallbackUiLocale() const
+{
+    QReadLocker locker(&m_lock);
+    return m_locale;
+}
+
+QT_END_NAMESPACE

src/plugins/platforms/android/src/qandroidsystemlocale.h

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QANDROIDSYSTEMLOCALE_H
+#define QANDROIDSYSTEMLOCALE_H
+
+#include "private/qlocale_p.h"
+#include <QtCore/qreadwritelock.h>
+
+QT_BEGIN_NAMESPACE
+
+class QAndroidSystemLocale : public QSystemLocale
+{
+public:
+    QAndroidSystemLocale();
+
+    virtual QVariant query(QueryType type, QVariant in) const;
+    virtual QLocale fallbackUiLocale() const;
+
+private:
+    void getLocaleFromJava() const;
+
+    mutable QLocale m_locale;
+    mutable QReadWriteLock m_lock;
+};
+
+QT_END_NAMESPACE
+
+#endif // QANDROIDSYSTEMLOCALE_H

src/plugins/platforms/android/src/src.pri

@@ -23,7 +23,8 @@ SOURCES += $$PWD/androidplatformplugin.cpp \
            $$PWD/qandroidplatformtheme.cpp \
            $$PWD/qandroidplatformmenubar.cpp \
            $$PWD/qandroidplatformmenu.cpp \
-           $$PWD/qandroidplatformmenuitem.cpp
+           $$PWD/qandroidplatformmenuitem.cpp \
+           $$PWD/qandroidsystemlocale.cpp
 
 
 HEADERS += $$PWD/qandroidplatformintegration.h \
@@ -39,7 +40,8 @@ HEADERS += $$PWD/qandroidplatformintegration.h \
            $$PWD/qandroidplatformtheme.h \
            $$PWD/qandroidplatformmenubar.h \
            $$PWD/qandroidplatformmenu.h \
-           $$PWD/qandroidplatformmenuitem.h
+           $$PWD/qandroidplatformmenuitem.h \
+           $$PWD/qandroidsystemlocale.h
 
 
 #Non-standard install directory, QTBUG-29859