Utils: Let registered aspects know about their containers

Will help to set up macroexpanders with less boiler plate.

Change-Id: I521af3dc9d49524cf855e82eecc0132d1bcc40db
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/aspects.cpp

@@ -52,6 +52,8 @@ namespace Internal {
 class BaseAspectPrivate
 {
 public:
+    explicit BaseAspectPrivate(AspectContainer *container) : m_container(container) {}
+
     Id m_id;
     std::function<QVariant(const QVariant &)> m_toSettings;
     std::function<QVariant(const QVariant &)> m_fromSettings;
@@ -64,6 +66,7 @@ public:
     QIcon m_icon;
     QPointer<QLabel> m_label; // Owned by configuration widget
     QPointer<QAction> m_action; // Owned by us.
+    AspectContainer *m_container = nullptr; // Not owned by us.
 
     bool m_visible = true;
     bool m_enabled = true;
@@ -106,7 +109,7 @@ public:
     If \a container is non-null, the aspect is made known to the container.
 */
 BaseAspect::BaseAspect(AspectContainer *container)
-    : d(new Internal::BaseAspectPrivate)
+    : d(new Internal::BaseAspectPrivate(container))
 {
     if (container)
         container->registerAspect(this);
@@ -438,6 +441,11 @@ QAction *BaseAspect::action()
     return d->m_action;
 }
 
+AspectContainer *BaseAspect::container() const
+{
+    return d->m_container;
+}
+
 /*!
     Adds the visual representation of this aspect to the layout with the
     specified \a parent using a layout builder.

src/libs/utils/aspects.h

@@ -94,6 +94,8 @@ public:
 
     virtual QAction *action();
 
+    AspectContainer *container() const;
+
     virtual void fromMap(const QVariantMap &map);
     virtual void toMap(QVariantMap &map) const;
     virtual void toActiveMap(QVariantMap &map) const { toMap(map); }