Utils: Allow more finegrained subaspect ownership in AspectContainer

Currently this luckily conincides with the register/addAspect schism
but that's not necessarily true in the future.

Change-Id: I05a59d74182dbdf81193ebd790d6f9bab2d30439
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/libs/utils/aspects.cpp

@@ -2399,9 +2399,9 @@ namespace Internal {
 class AspectContainerPrivate
 {
 public:
-    QList<BaseAspect *> m_items; // Not owned
+    QList<BaseAspect *> m_items; // Both owned and non-owned.
+    QList<BaseAspect *> m_ownedItems; // Owned only.
     bool m_autoApply = true;
-    bool m_ownsSubAspects = false;
     QStringList m_settingsGroup;
 };
 
@@ -2416,17 +2416,18 @@ AspectContainer::AspectContainer(QObject *parent)
 */
 AspectContainer::~AspectContainer()
 {
-    if (d->m_ownsSubAspects)
-        qDeleteAll(d->m_items);
+    qDeleteAll(d->m_ownedItems);
 }
 
 /*!
     \internal
 */
-void AspectContainer::registerAspect(BaseAspect *aspect)
+void AspectContainer::registerAspect(BaseAspect *aspect, bool takeOwnership)
 {
     aspect->setAutoApply(d->m_autoApply);
     d->m_items.append(aspect);
+    if (takeOwnership)
+        d->m_ownedItems.append(aspect);
 }
 
 void AspectContainer::registerAspects(const AspectContainer &aspects)
@@ -2547,11 +2548,6 @@ void AspectContainer::setAutoApply(bool on)
         aspect->setAutoApply(on);
 }
 
-void AspectContainer::setOwnsSubAspects(bool on)
-{
-    d->m_ownsSubAspects = on;
-}
-
 bool AspectContainer::isDirty() const
 {
     for (BaseAspect *aspect : std::as_const(d->m_items)) {

src/libs/utils/aspects.h

@@ -651,14 +651,14 @@ public:
     AspectContainer(const AspectContainer &) = delete;
     AspectContainer &operator=(const AspectContainer &) = delete;
 
-    void registerAspect(BaseAspect *aspect);
+    void registerAspect(BaseAspect *aspect, bool takeOwnership = false);
     void registerAspects(const AspectContainer &aspects);
 
     template <class Aspect, typename ...Args>
     Aspect *addAspect(Args && ...args)
     {
         auto aspect = new Aspect(args...);
-        registerAspect(aspect);
+        registerAspect(aspect, true);
         return aspect;
     }
 
@@ -679,7 +679,6 @@ public:
     bool equals(const AspectContainer &other) const;
     void copyFrom(const AspectContainer &other);
     void setAutoApply(bool on);
-    void setOwnsSubAspects(bool on);
     bool isDirty() const;
 
     template <typename T> T *aspect() const

src/plugins/projectexplorer/copystep.cpp

@@ -21,8 +21,6 @@ public:
     CopyStepBase(BuildStepList *bsl, Id id)
         : BuildStep(bsl, id)
     {
-        setOwnsSubAspects(false);
-
         m_sourceAspect.setSettingsKey(SOURCE_KEY);
         m_sourceAspect.setLabelText(Tr::tr("Source:"));
 

src/plugins/projectexplorer/projectconfiguration.cpp

@@ -22,8 +22,6 @@ ProjectConfiguration::ProjectConfiguration(QObject *parent, Utils::Id id)
     : AspectContainer(parent)
     , m_id(id)
 {
-    setOwnsSubAspects(true);
-
     QTC_CHECK(parent);
     QTC_CHECK(id.isValid());
     setObjectName(id.toString());

src/plugins/python/pysidebuildconfiguration.cpp

@@ -34,8 +34,6 @@ PySideBuildStepFactory::PySideBuildStepFactory()
 PySideBuildStep::PySideBuildStep(BuildStepList *bsl, Id id)
     : AbstractProcessStep(bsl, id)
 {
-    setOwnsSubAspects(false);
-
     m_pysideProject.setSettingsKey("Python.PySideProjectTool");
     m_pysideProject.setLabelText(Tr::tr("PySide project tool:"));
     m_pysideProject.setToolTip(Tr::tr("Enter location of PySide project tool."));