Add conversion functions for QTimeZone and CFTimeZone/NSTimeZone

Change-Id: I3a2e18d69577296bf612e13e40414bce1daa6a71
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qcore_foundation.mm

@@ -46,6 +46,13 @@
 #include <QtCore/qbytearray.h>
 #include <QtCore/qrect.h>
 
+#if QT_CONFIG(timezone) && !defined(QT_NO_SYSTEMLOCALE)
+#include <QtCore/qtimezone.h>
+#include <QtCore/private/qtimezoneprivate_p.h>
+#include <QtCore/private/qcore_mac_p.h>
+#endif
+
+#import <CoreFoundation/CoreFoundation.h>
 #import <Foundation/Foundation.h>
 
 #if defined(QT_PLATFORM_UIKIT)
@@ -422,6 +429,67 @@ NSDate *QDateTime::toNSDate() const
 
 // ----------------------------------------------------------------------------
 
+#if QT_CONFIG(timezone) && !defined(QT_NO_SYSTEMLOCALE)
+/*!
+    \since 5.9
+
+    Constructs a new QTimeZone containing a copy of the CFTimeZone \a timeZone.
+
+    \sa toCFTimeZone()
+*/
+QTimeZone QTimeZone::fromCFTimeZone(CFTimeZoneRef timeZone)
+{
+    if (!timeZone)
+        return QTimeZone();
+    return QTimeZone(QString::fromCFString(CFTimeZoneGetName(timeZone)).toLatin1());
+}
+
+/*!
+    \since 5.9
+
+    Creates a CFTimeZone from a QTimeZone. The caller owns the CFTimeZone object
+    and is responsible for releasing it.
+
+    \sa fromCFTimeZone()
+*/
+CFTimeZoneRef QTimeZone::toCFTimeZone() const
+{
+#ifndef QT_NO_DYNAMIC_CAST
+    Q_ASSERT(dynamic_cast<const QMacTimeZonePrivate *>(d.data()));
+#endif
+    const QMacTimeZonePrivate *p = static_cast<const QMacTimeZonePrivate *>(d.data());
+    return reinterpret_cast<CFTimeZoneRef>([p->nsTimeZone() copy]);
+}
+
+/*!
+    \since 5.9
+
+    Constructs a new QTimeZone containing a copy of the NSTimeZone \a timeZone.
+
+    \sa toNSTimeZone()
+*/
+QTimeZone QTimeZone::fromNSTimeZone(const NSTimeZone *timeZone)
+{
+    if (!timeZone)
+        return QTimeZone();
+    return QTimeZone(QString::fromNSString(timeZone.name).toLatin1());
+}
+
+/*!
+    \since 5.9
+
+    Creates an NSTimeZone from a QTimeZone. The NSTimeZone object is autoreleased.
+
+    \sa fromNSTimeZone()
+*/
+NSTimeZone *QTimeZone::toNSTimeZone() const
+{
+    return [static_cast<NSTimeZone *>(toCFTimeZone()) autorelease];
+}
+#endif
+
+// ----------------------------------------------------------------------------
+
 /*!
     \since 5.8
 

src/corelib/tools/qtimezone.h

@@ -47,6 +47,11 @@
 
 QT_REQUIRE_CONFIG(timezone);
 
+#if (defined(Q_OS_DARWIN) || defined(Q_QDOC)) && !defined(QT_NO_SYSTEMLOCALE)
+Q_FORWARD_DECLARE_CF_TYPE(CFTimeZone);
+Q_FORWARD_DECLARE_OBJC_CLASS(NSTimeZone);
+#endif
+
 QT_BEGIN_NAMESPACE
 
 class QTimeZonePrivate;
@@ -142,6 +147,13 @@ public:
     static QList<QByteArray> windowsIdToIanaIds(const QByteArray &windowsId,
                                                  QLocale::Country country);
 
+#if (defined(Q_OS_DARWIN) || defined(Q_QDOC)) && !defined(QT_NO_SYSTEMLOCALE)
+    static QTimeZone fromCFTimeZone(CFTimeZoneRef timeZone);
+    CFTimeZoneRef toCFTimeZone() const Q_DECL_CF_RETURNS_RETAINED;
+    static QTimeZone fromNSTimeZone(const NSTimeZone *timeZone);
+    NSTimeZone *toNSTimeZone() const Q_DECL_NS_RETURNS_AUTORELEASED;
+#endif
+
 private:
     QTimeZone(QTimeZonePrivate &dd);
 #ifndef QT_NO_DATASTREAM

src/corelib/tools/qtimezoneprivate_mac.mm

@@ -273,4 +273,9 @@ QList<QByteArray> QMacTimeZonePrivate::availableTimeZoneIds() const
     return list;
 }
 
+NSTimeZone *QMacTimeZonePrivate::nsTimeZone() const
+{
+    return m_nstz;
+}
+
 QT_END_NAMESPACE

src/corelib/tools/qtimezoneprivate_p.h

@@ -60,13 +60,9 @@
 #include <unicode/ucal.h>
 #endif
 
-#ifdef Q_OS_MAC
-#ifdef __OBJC__
-@class NSTimeZone;
-#else
-class NSTimeZone;
-#endif // __OBJC__
-#endif // Q_OS_MAC
+#ifdef Q_OS_DARWIN
+Q_FORWARD_DECLARE_OBJC_CLASS(NSTimeZone);
+#endif // Q_OS_DARWIN
 
 #ifdef Q_OS_WIN
 #include <qt_windows.h>
@@ -380,6 +376,8 @@ public:
 
     QList<QByteArray> availableTimeZoneIds() const Q_DECL_OVERRIDE;
 
+    NSTimeZone *nsTimeZone() const;
+
 private:
     void init(const QByteArray &zoneId);
 

tests/auto/corelib/tools/qtimezone/qtimezone.pro

@@ -5,3 +5,8 @@ SOURCES = tst_qtimezone.cpp
 qtConfig(icu) {
     DEFINES += QT_USE_ICU
 }
+
+darwin {
+    OBJECTIVE_SOURCES += tst_qtimezone_darwin.mm
+    LIBS += -framework Foundation
+}

tests/auto/corelib/tools/qtimezone/tst_qtimezone.cpp

@@ -56,6 +56,7 @@ private slots:
     void icuTest();
     void tzTest();
     void macTest();
+    void darwinTypes();
     void winTest();
 
 private:
@@ -955,6 +956,16 @@ void tst_QTimeZone::macTest()
 #endif // Q_OS_MAC
 }
 
+void tst_QTimeZone::darwinTypes()
+{
+#ifndef Q_OS_DARWIN
+    QSKIP("This is an Apple-only test");
+#else
+    extern void tst_QTimeZone_darwinTypes(); // in tst_qtimezone_darwin.mm
+    tst_QTimeZone_darwinTypes();
+#endif
+}
+
 void tst_QTimeZone::winTest()
 {
 #if defined(QT_BUILD_INTERNAL) && defined(Q_OS_WIN)

tests/auto/corelib/tools/qtimezone/tst_qtimezone_darwin.mm

@@ -0,0 +1,68 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QTimeZone>
+#include <QtTest/QtTest>
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <Foundation/Foundation.h>
+
+void tst_QTimeZone_darwinTypes()
+{
+#if !defined(QT_NO_SYSTEMLOCALE)
+    // QTimeZone <-> CFTimeZone
+    {
+        QTimeZone qtTimeZone("America/Los_Angeles");
+        const CFTimeZoneRef cfTimeZone = qtTimeZone.toCFTimeZone();
+        QCOMPARE(QTimeZone::fromCFTimeZone(cfTimeZone), qtTimeZone);
+        CFRelease(cfTimeZone);
+    }
+    {
+        CFTimeZoneRef cfTimeZone = CFTimeZoneCreateWithName(kCFAllocatorDefault,
+            CFSTR("America/Los_Angeles"), false);
+        const QTimeZone qtTimeZone = QTimeZone::fromCFTimeZone(cfTimeZone);
+        QVERIFY(CFEqual(qtTimeZone.toCFTimeZone(), cfTimeZone));
+        CFRelease(cfTimeZone);
+    }
+    // QTimeZone <-> NSTimeZone
+    {
+        NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
+        QTimeZone qtTimeZone("America/Los_Angeles");
+        const NSTimeZone *nsTimeZone = qtTimeZone.toNSTimeZone();
+        QCOMPARE(QTimeZone::fromNSTimeZone(nsTimeZone), qtTimeZone);
+        [autoreleasepool release];
+    }
+    {
+        NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
+        NSTimeZone *nsTimeZone = [NSTimeZone timeZoneWithName:@"America/Los_Angeles"];
+        const QTimeZone qtTimeZone = QTimeZone::fromNSTimeZone(nsTimeZone);
+        QVERIFY([qtTimeZone.toNSTimeZone() isEqual:nsTimeZone]);
+        [autoreleasepool release];
+    }
+#endif
+}