QtSupport: Replace BaseQtVersion::clone()

... by a mechanism that doesn't require re-implementation in each
derived class.

A QtVersion's type() is uniquely defined by the supported type of
the factory creating it, so that factory can be found and used
for cloning. Non-base data is copied by a fromMap(toMap()) dance
as done in the project configurations.

As a side-effect, the *QtVersion copy constructors are not used
and not needed anymore.

Change-Id: I3aa5a0fd90a27dd115769e0573647cb5669641a0
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/android/androidqtversion.cpp

@@ -52,16 +52,6 @@ AndroidQtVersion::AndroidQtVersion()
 {
 }
 
-AndroidQtVersion *AndroidQtVersion::clone() const
-{
-    return new AndroidQtVersion(*this);
-}
-
-QString AndroidQtVersion::type() const
-{
-    return QLatin1String(Constants::ANDROIDQT);
-}
-
 bool AndroidQtVersion::isValid() const
 {
     if (!BaseQtVersion::isValid())

src/plugins/android/androidqtversion.h

@@ -40,8 +40,6 @@ class AndroidQtVersion : public QtSupport::BaseQtVersion
 public:
     AndroidQtVersion();
 
-    AndroidQtVersion *clone() const override;
-    QString type() const override;
     bool isValid() const override;
     QString invalidReason() const override;
 

src/plugins/ios/iosqtversion.cpp

@@ -42,16 +42,6 @@ using namespace ProjectExplorer;
 
 IosQtVersion::IosQtVersion() = default;
 
-IosQtVersion *IosQtVersion::clone() const
-{
-    return new IosQtVersion(*this);
-}
-
-QString IosQtVersion::type() const
-{
-    return QLatin1String(Constants::IOSQT);
-}
-
 bool IosQtVersion::isValid() const
 {
     if (!BaseQtVersion::isValid())

src/plugins/ios/iosqtversion.h

@@ -40,8 +40,6 @@ class IosQtVersion : public QtSupport::BaseQtVersion
 public:
     IosQtVersion();
 
-    IosQtVersion *clone() const override;
-    QString type() const override;
     bool isValid() const override;
     QString invalidReason() const override;
 

src/plugins/qnx/qnxqtversion.cpp

@@ -46,16 +46,6 @@ static char SDP_PATH_KEY[] = "SDKPath";
 
 QnxQtVersion::QnxQtVersion() = default;
 
-QnxQtVersion *QnxQtVersion::clone() const
-{
-    return new QnxQtVersion(*this);
-}
-
-QString QnxQtVersion::type() const
-{
-    return QLatin1String(Constants::QNX_QNX_QT);
-}
-
 QString QnxQtVersion::description() const
 {
     //: Qt Version is meant for QNX

src/plugins/qnx/qnxqtversion.h

@@ -41,10 +41,6 @@ class QnxQtVersion : public QtSupport::BaseQtVersion
 public:
     QnxQtVersion();
 
-    QnxQtVersion *clone() const override;
-
-    QString type() const override;
-
     QString description() const override;
 
     QSet<Core::Id> availableFeatures() const override;

src/plugins/qtsupport/baseqtversion.cpp

@@ -28,8 +28,10 @@
 #include "qmldumptool.h"
 #include "qtkitinformation.h"
 
+#include "qtversionfactory.h"
 #include "qtversionmanager.h"
 #include "profilereader.h"
+
 #include <coreplugin/icore.h>
 #include <coreplugin/progressmanager/progressmanager.h>
 #include <proparser/qmakevfs.h>
@@ -193,7 +195,6 @@ bool QtVersionNumber::operator >=(const QtVersionNumber &b) const
 // BaseQtVersion
 ///////////////
 
-BaseQtVersion::BaseQtVersion(const BaseQtVersion &other) = default;
 BaseQtVersion::BaseQtVersion() = default;
 
 BaseQtVersion::~BaseQtVersion() = default;
@@ -645,6 +646,12 @@ int BaseQtVersion::uniqueId() const
     return m_id;
 }
 
+QString BaseQtVersion::type() const
+{
+    QTC_ASSERT(m_factory, return QString());
+    return m_factory->supportedType();
+}
+
 bool BaseQtVersion::isAutodetected() const
 {
     return m_isAutodetected;

src/plugins/qtsupport/baseqtversion.h

@@ -64,6 +64,7 @@ namespace QtSupport
 class QtConfigWidget;
 
 class BaseQtVersion;
+class QtVersionFactory;
 
 // Wrapper to make the std::unique_ptr<Utils::MacroExpander> "copyable":
 class MacroExpanderWrapper
@@ -113,7 +114,6 @@ public:
     virtual ~BaseQtVersion();
 
     virtual void fromMap(const QVariantMap &map);
-    virtual BaseQtVersion *clone() const = 0;
     virtual bool equals(BaseQtVersion *other);
 
     bool isAutodetected() const;
@@ -126,7 +126,7 @@ public:
     // All valid Ids are >= 0
     int uniqueId() const;
 
-    virtual QString type() const = 0;
+    QString type() const;
 
     virtual QVariantMap toMap() const;
     virtual bool isValid() const;
@@ -259,7 +259,7 @@ protected:
     virtual QSet<Core::Id> availableFeatures() const;
 
     BaseQtVersion();
-    BaseQtVersion(const BaseQtVersion &other);
+    BaseQtVersion(const BaseQtVersion &other) = delete;
 
     virtual QList<ProjectExplorer::Task> reportIssuesImpl(const QString &proFile, const QString &buildDir) const;
 
@@ -292,6 +292,7 @@ private:
                         // and by the qtoptionspage to replace Qt versions
 
     int m_id = -1;
+    const QtVersionFactory *m_factory = nullptr; // The factory that created us.
 
     bool m_isAutodetected = false;
     mutable bool m_hasQmlDump = false;         // controlled by m_versionInfoUpToDate

src/plugins/qtsupport/desktopqtversion.cpp

@@ -46,16 +46,6 @@ DesktopQtVersion::DesktopQtVersion()
 
 }
 
-DesktopQtVersion *DesktopQtVersion::clone() const
-{
-    return new DesktopQtVersion(*this);
-}
-
-QString DesktopQtVersion::type() const
-{
-    return QLatin1String(Constants::DESKTOPQT);
-}
-
 QStringList DesktopQtVersion::warningReason() const
 {
     QStringList ret = BaseQtVersion::warningReason();
@@ -112,9 +102,6 @@ QString DesktopQtVersion::qmlsceneCommand() const
     return m_qmlsceneCommand;
 }
 
-DesktopQtVersion::DesktopQtVersion(const DesktopQtVersion &other) = default;
-
-
 namespace Internal {
 
 // Factory

src/plugins/qtsupport/desktopqtversion.h

@@ -36,10 +36,6 @@ class QTSUPPORT_EXPORT DesktopQtVersion : public BaseQtVersion
 public:
     DesktopQtVersion();
 
-    DesktopQtVersion *clone() const override;
-
-    QString type() const override;
-
     QStringList warningReason() const override;
 
     QString description() const override;
@@ -51,9 +47,6 @@ public:
 
     QString qmlsceneCommand() const;
 
-protected:
-    DesktopQtVersion(const DesktopQtVersion &other);
-
 private:
     mutable QString m_qmlsceneCommand;
 };

src/plugins/qtsupport/qtoptionspage.cpp

@@ -522,7 +522,7 @@ void QtOptionsPageWidget::updateQtVersions(const QList<int> &additions, const QL
 
     // Add changed/added items:
     foreach (int a, toAdd) {
-        BaseQtVersion *version = QtVersionManager::version(a)->clone();
+        BaseQtVersion *version = QtVersionFactory::cloneQtVersion(QtVersionManager::version(a));
         auto *item = new QtVersionItem(version);
 
         // Insert in the right place:
@@ -753,7 +753,7 @@ void QtOptionsPageWidget::apply()
 
     m_model->forItemsAtLevel<2>([&versions](QtVersionItem *item) {
         item->setChanged(false);
-        versions.append(item->version()->clone());
+        versions.append(QtVersionFactory::cloneQtVersion(item->version()));
     });
 
     QtVersionManager::setNewQtVersions(versions);

src/plugins/qtsupport/qtversionfactory.cpp

@@ -66,7 +66,7 @@ BaseQtVersion *QtVersionFactory::restore(const QString &type, const QVariantMap
 {
     QTC_ASSERT(canRestore(type), return nullptr);
     QTC_ASSERT(m_creator, return nullptr);
-    BaseQtVersion *version = m_creator();
+    BaseQtVersion *version = create();
     version->fromMap(data);
     return version;
 }
@@ -104,8 +104,7 @@ BaseQtVersion *QtVersionFactory::createQtVersionFromQMakePath(const Utils::FileN
 
     foreach (QtVersionFactory *factory, factories) {
         if (!factory->m_restrictionChecker || factory->m_restrictionChecker(setup)) {
-            QTC_ASSERT(factory->m_creator, continue);
-            BaseQtVersion *ver = factory->m_creator();
+            BaseQtVersion *ver = factory->create();
             QTC_ASSERT(ver, continue);
             ver->setupQmakePathAndId(qmakePath);
             ver->setAutoDetectionSource(autoDetectionSource);
@@ -122,6 +121,35 @@ BaseQtVersion *QtVersionFactory::createQtVersionFromQMakePath(const Utils::FileN
     return 0;
 }
 
+BaseQtVersion *QtVersionFactory::create() const
+{
+    QTC_ASSERT(m_creator, return nullptr);
+    BaseQtVersion *version = m_creator();
+    version->m_factory = this;
+    return version;
+}
+
+QString QtVersionFactory::supportedType() const
+{
+    return m_supportedType;
+}
+
+BaseQtVersion *QtVersionFactory::cloneQtVersion(const BaseQtVersion *source)
+{
+    QTC_ASSERT(source, return nullptr);
+    const QString sourceType = source->type();
+    for (QtVersionFactory *factory : g_qtVersionFactories) {
+        if (factory->m_supportedType == sourceType) {
+            BaseQtVersion *version = factory->create();
+            QTC_ASSERT(version, return nullptr);
+            version->fromMap(source->toMap());
+            return version;
+        }
+    }
+    QTC_CHECK(false);
+    return nullptr;
+}
+
 void QtVersionFactory::setQtVersionCreator(const std::function<BaseQtVersion *()> &creator)
 {
     m_creator = creator;

src/plugins/qtsupport/qtversionfactory.h

@@ -51,10 +51,14 @@ public:
     /// the desktop factory claims to handle all paths
     int priority() const { return m_priority; }
 
+    QString supportedType() const;
+
     static BaseQtVersion *createQtVersionFromQMakePath(
             const Utils::FileName &qmakePath, bool isAutoDetected = false,
             const QString &autoDetectionSource = QString(), QString *error = nullptr);
 
+    static BaseQtVersion *cloneQtVersion(const BaseQtVersion *source);
+
 protected:
     struct SetupData
     {
@@ -69,6 +73,8 @@ protected:
     void setPriority(int priority);
 
 private:
+    BaseQtVersion *create() const;
+
     std::function<BaseQtVersion *()> m_creator;
     std::function<bool(const SetupData &)> m_restrictionChecker;
     QString m_supportedType;

src/plugins/remotelinux/embeddedlinuxqtversion.cpp

@@ -35,16 +35,6 @@
 namespace RemoteLinux {
 namespace Internal {
 
-EmbeddedLinuxQtVersion *EmbeddedLinuxQtVersion::clone() const
-{
-    return new EmbeddedLinuxQtVersion(*this);
-}
-
-QString EmbeddedLinuxQtVersion::type() const
-{
-    return QLatin1String(RemoteLinux::Constants::EMBEDDED_LINUX_QT);
-}
-
 QString EmbeddedLinuxQtVersion::description() const
 {
     return QCoreApplication::translate("QtVersion", "Embedded Linux", "Qt Version is used for embedded Linux development");

src/plugins/remotelinux/embeddedlinuxqtversion.h

@@ -36,10 +36,6 @@ class EmbeddedLinuxQtVersion : public QtSupport::BaseQtVersion
 public:
     EmbeddedLinuxQtVersion() = default;
 
-    EmbeddedLinuxQtVersion *clone() const override;
-
-    QString type() const override;
-
     QString description() const override;
 
     QSet<Core::Id> targetDeviceTypes() const override;

src/plugins/winrt/winrtphoneqtversion.cpp

@@ -40,16 +40,6 @@ QString WinRtPhoneQtVersion::description() const
     return tr("Windows Phone");
 }
 
-QtSupport::BaseQtVersion *WinRtPhoneQtVersion::clone() const
-{
-    return new WinRtPhoneQtVersion(*this);
-}
-
-QString WinRtPhoneQtVersion::type() const
-{
-    return QLatin1String(Constants::WINRT_WINPHONEQT);
-}
-
 QSet<Core::Id> WinRtPhoneQtVersion::targetDeviceTypes() const
 {
     return {Constants::WINRT_DEVICE_TYPE_PHONE, Constants::WINRT_DEVICE_TYPE_EMULATOR};

src/plugins/winrt/winrtphoneqtversion.h

@@ -39,8 +39,6 @@ public:
     QSet<Core::Id> availableFeatures() const override;
 
     QString description() const override;
-    BaseQtVersion *clone() const override;
-    QString type() const override;
     QSet<Core::Id> targetDeviceTypes() const override;
 };
 

src/plugins/winrt/winrtqtversion.cpp

@@ -33,16 +33,6 @@
 namespace WinRt {
 namespace Internal {
 
-QtSupport::BaseQtVersion *WinRtQtVersion::clone() const
-{
-    return new WinRtQtVersion(*this);
-}
-
-QString WinRtQtVersion::type() const
-{
-    return QLatin1String(Constants::WINRT_WINRTQT);
-}
-
 QString WinRtQtVersion::description() const
 {
     return tr("Windows Runtime");

src/plugins/winrt/winrtqtversion.h

@@ -37,8 +37,6 @@ class WinRtQtVersion : public QtSupport::BaseQtVersion
 public:
     WinRtQtVersion() = default;
 
-    BaseQtVersion *clone() const override;
-    QString type() const override;
     QString description() const override;
     QSet<Core::Id> availableFeatures() const override;