darwin: Remove unneeded SDK version checks for older versions

All versions down to 6.2 require at least Xcode 12, which ships with
the macOS 11 SDK, and iOS 14 SDK.

Change-Id: I128321ec9e97b670b7c027f1233978e1b8856f88
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
(cherry picked from commit eb774dfc7b3e4cbaeab41f345612ae079361141b)
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

mkspecs/common/macx.conf

@@ -7,7 +7,7 @@ QMAKE_MAC_SDK           = macosx
 
 QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.14
 
-QT_MAC_SDK_VERSION_MIN = 10.15
+QT_MAC_SDK_VERSION_MIN = 11
 
 QT_MAC_SDK_VERSION_MAX = 12
 

src/corelib/kernel/qcore_mac.mm

@@ -335,13 +335,11 @@ QDebug operator<<(QDebug debug, const QCFString &string)
 #ifdef Q_OS_MACOS
 bool qt_mac_applicationIsInDarkMode()
 {
-#if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
     if (__builtin_available(macOS 10.14, *)) {
         auto appearance = [NSApp.effectiveAppearance bestMatchFromAppearancesWithNames:
                 @[ NSAppearanceNameAqua, NSAppearanceNameDarkAqua ]];
         return [appearance isEqualToString:NSAppearanceNameDarkAqua];
     }
-#endif
     return false;
 }
 
@@ -711,11 +709,9 @@ QMacVersion::VersionTuple QMacVersion::versionsForImage(const mach_header *machH
             || loadCommand->cmd == LC_VERSION_MIN_TVOS || loadCommand->cmd == LC_VERSION_MIN_WATCHOS) {
             auto versionCommand = reinterpret_cast<version_min_command *>(loadCommand);
             return makeVersionTuple(versionCommand->version, versionCommand->sdk, osForLoadCommand(loadCommand->cmd));
-#if QT_DARWIN_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_13, __IPHONE_11_0, __TVOS_11_0, __WATCHOS_4_0)
         } else if (loadCommand->cmd == LC_BUILD_VERSION) {
             auto versionCommand = reinterpret_cast<build_version_command *>(loadCommand);
             return makeVersionTuple(versionCommand->minos, versionCommand->sdk, osForPlatform(versionCommand->platform));
-#endif
         }
         commandCursor += loadCommand->cmdsize;
     }

src/gui/platform/darwin/qapplekeymapper.mm

@@ -601,7 +601,6 @@ QList<int> QAppleKeyMapper::possibleKeys(const QKeyEvent *event) const
 API_AVAILABLE(ios(13.4)) Qt::Key QAppleKeyMapper::fromUIKitKey(NSString *keyCode)
 {
     static QHash<NSString *, Qt::Key> uiKitKeys = {
-#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__IPHONE_13_4)
         { UIKeyInputF1, Qt::Key_F1 },
         { UIKeyInputF2, Qt::Key_F2 },
         { UIKeyInputF3, Qt::Key_F3 },
@@ -618,7 +617,6 @@ API_AVAILABLE(ios(13.4)) Qt::Key QAppleKeyMapper::fromUIKitKey(NSString *keyCode
         { UIKeyInputEnd, Qt::Key_End },
         { UIKeyInputPageUp, Qt::Key_PageUp },
         { UIKeyInputPageDown, Qt::Key_PageDown },
-#endif
         { UIKeyInputEscape, Qt::Key_Escape },
         { UIKeyInputUpArrow, Qt::Key_Up },
         { UIKeyInputDownArrow, Qt::Key_Down },

src/plugins/platforms/cocoa/qcocoatheme.mm

@@ -33,18 +33,6 @@
 
 #include <CoreServices/CoreServices.h>
 
-#if !QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
-@interface NSColor (MojaveForwardDeclarations)
-@property (class, strong, readonly) NSColor *selectedContentBackgroundColor NS_AVAILABLE_MAC(10_14);
-@property (class, strong, readonly) NSColor *unemphasizedSelectedTextBackgroundColor NS_AVAILABLE_MAC(10_14);
-@property (class, strong, readonly) NSColor *unemphasizedSelectedTextColor NS_AVAILABLE_MAC(10_14);
-@property (class, strong, readonly) NSColor *unemphasizedSelectedContentBackgroundColor NS_AVAILABLE_MAC(10_14);
-@property (class, strong, readonly) NSArray<NSColor *> *alternatingContentBackgroundColors NS_AVAILABLE_MAC(10_14);
-// Missing from non-Mojave SDKs, even if introduced in 10.10
-@property (class, strong, readonly) NSColor *linkColor NS_AVAILABLE_MAC(10_10);
-@end
-#endif
-
 QT_BEGIN_NAMESPACE
 
 static QPalette *qt_mac_createSystemPalette()
@@ -241,7 +229,6 @@ const char *QCocoaTheme::name = "cocoa";
 QCocoaTheme::QCocoaTheme()
     : m_systemPalette(nullptr)
 {
-#if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
     if (QOperatingSystemVersion::current() >= QOperatingSystemVersion::MacOSMojave) {
         m_appearanceObserver = QMacKeyValueObserver(NSApp, @"effectiveAppearance", [this] {
             if (__builtin_available(macOS 10.14, *))
@@ -250,7 +237,6 @@ QCocoaTheme::QCocoaTheme()
             handleSystemThemeChange();
         });
     }
-#endif
 
     m_systemColorObserver = QMacNotificationObserver(nil,
         NSSystemColorsDidChangeNotification, [this] {

src/plugins/platforms/ios/quiview.mm

@@ -558,7 +558,6 @@ Q_LOGGING_CATEGORY(lcQpaTablet, "qt.qpa.input.tablet")
     case UIPressTypeMenu: return Qt::Key_Menu;
     case UIPressTypePlayPause: return Qt::Key_MediaTogglePlayPause;
     }
-#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__IPHONE_13_4)
     if (@available(ios 13.4, *)) {
         NSString *charactersIgnoringModifiers = press.key.charactersIgnoringModifiers;
         Qt::Key key = QAppleKeyMapper::fromUIKitKey(charactersIgnoringModifiers);
@@ -567,7 +566,6 @@ Q_LOGGING_CATEGORY(lcQpaTablet, "qt.qpa.input.tablet")
         return QAppleKeyMapper::fromNSString(qtModifiers, press.key.characters,
                                              charactersIgnoringModifiers, text);
     }
-#endif
     return Qt::Key_unknown;
 }
 
@@ -580,10 +578,8 @@ Q_LOGGING_CATEGORY(lcQpaTablet, "qt.qpa.input.tablet")
     bool handled = false;
     for (UIPress* press in presses) {
         Qt::KeyboardModifiers qtModifiers = Qt::NoModifier;
-#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__IPHONE_13_4)
         if (@available(ios 13.4, *))
             qtModifiers = QAppleKeyMapper::fromUIKitModifiers(press.key.modifierFlags);
-#endif
         QString text;
         int key = [self mapPressTypeToKey:press withModifiers:qtModifiers text:text];
         if (key == Qt::Key_unknown)

src/plugins/styles/mac/qmacstyle_mac.mm

@@ -385,7 +385,6 @@ class AppearanceSync {
 public:
     AppearanceSync()
     {
-#if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
         if (QOperatingSystemVersion::current() >= QOperatingSystemVersion::MacOSMojave
             && !isDarkMode()) {
             auto requiredAppearanceName = NSApplication.sharedApplication.effectiveAppearance.name;
@@ -394,7 +393,6 @@ public:
                 NSAppearance.currentAppearance = [NSAppearance appearanceNamed:requiredAppearanceName];
             }
         }
-#endif // QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
     }
 
     ~AppearanceSync()
@@ -2066,7 +2064,6 @@ QMacStyle::QMacStyle()
                 QCoreApplication::sendEvent(o, &event);
     });
 
-#if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
     Q_D(QMacStyle);
     // FIXME: Tie this logic into theme change, or even polish/unpolish
     if (QOperatingSystemVersion::current() >= QOperatingSystemVersion::MacOSMojave) {
@@ -2077,7 +2074,6 @@ QMacStyle::QMacStyle()
             d->cocoaControls.clear();
         });
     }
-#endif
 }
 
 QMacStyle::~QMacStyle()

src/plugins/tls/securetransport/qtls_st.cpp

@@ -315,7 +315,6 @@ void TlsCryptographSecureTransport::continueHandshake()
     qCDebug(lcSecureTransport) << d->plainTcpSocket() << "connection encrypted";
 #endif
 
-#if QT_DARWIN_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_13_4, __IPHONE_11_0, __TVOS_11_0, __WATCHOS_4_0)
     // Unlike OpenSSL, Secure Transport does not allow to negotiate protocols via
     // a callback during handshake. We can only set our list of preferred protocols
     // (and send it during handshake) and then receive what our peer has sent to us.
@@ -350,7 +349,6 @@ void TlsCryptographSecureTransport::continueHandshake()
             }
         }
     }
-#endif // QT_DARWIN_PLATFORM_SDK_EQUAL_OR_ABOVE
 
     if (!renegotiating)
         emit q->encrypted();
@@ -694,7 +692,6 @@ bool TlsCryptographSecureTransport::initSslContext()
         return false;
     }
 
-#if QT_DARWIN_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_13_4, __IPHONE_11_0, __TVOS_11_0, __WATCHOS_4_0)
     if (__builtin_available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)) {
         const auto protocolNames = configuration.allowedNextProtocols();
         QCFType<CFMutableArrayRef> cfNames(CFArrayCreateMutable(nullptr, 0, &kCFTypeArrayCallBacks));
@@ -722,7 +719,6 @@ bool TlsCryptographSecureTransport::initSslContext()
             qCWarning(lcSecureTransport) << "failed to allocate ALPN names array";
         }
     }
-#endif // QT_DARWIN_PLATFORM_SDK_EQUAL_OR_ABOVE
 
     if (mode == QSslSocket::SslClientMode) {
         // enable Server Name Indication (SNI)