sfx2 classification: add config listener to avoid restarts

So that when SvxPathTabPage sets a custom classification path (or resets
it back to the default), then no restart is needed, the toolbar will be
updated instantly.

ClassificationCategoriesController::statusChanged() was called already,
all that was necessary is to remove old entries, to trigger a re-read of
the policy.

Change-Id: I98edea19fedfb5c1197981085193f959c19647a1

sfx2/source/view/classificationcontroller.cxx

@@ -24,18 +24,34 @@
 #include <cppuhelper/supportsservice.hxx>
 #include <comphelper/propertysequence.hxx>
 #include <comphelper/dispatchcommand.hxx>
+#include <comphelper/configurationlistener.hxx>
 
 using namespace com::sun::star;
 
 namespace sfx2
 {
 
+class ClassificationCategoriesController;
+using ClassificationPropertyListenerBase = comphelper::ConfigurationListenerProperty<OUString>;
+
+/// Listens to configuration changes, so no restart is needed after setting the classification path.
+class ClassificationPropertyListener : public ClassificationPropertyListenerBase
+{
+    ClassificationCategoriesController& m_rController;
+
+public:
+    ClassificationPropertyListener(const rtl::Reference<comphelper::ConfigurationListener>& xListener, ClassificationCategoriesController& rController);
+    virtual void setProperty(const uno::Any& rProperty) override;
+};
+
 using ClassificationCategoriesControllerBase = cppu::ImplInheritanceHelper<svt::ToolboxController, lang::XServiceInfo>;
 
 /// Controller for .uno:ClassificationApply.
 class ClassificationCategoriesController : public ClassificationCategoriesControllerBase
 {
     VclPtr<ListBox> m_pCategories;
+    rtl::Reference<comphelper::ConfigurationListener> m_xListener;
+    ClassificationPropertyListener m_aPropertyListener;
 
     DECL_LINK_TYPED(SelectHdl, ListBox&, void);
 
@@ -56,12 +72,29 @@ public:
 
     // XStatusListener
     virtual void SAL_CALL statusChanged(const frame::FeatureStateEvent& rEvent) throw (uno::RuntimeException, std::exception) override;
+
+    void removeEntries();
 };
 
+ClassificationPropertyListener::ClassificationPropertyListener(const rtl::Reference<comphelper::ConfigurationListener>& xListener, ClassificationCategoriesController& rController)
+    : ClassificationPropertyListenerBase(xListener, "WritePath")
+    , m_rController(rController)
+{
+}
+
+void ClassificationPropertyListener::setProperty(const uno::Any& /*rProperty*/)
+{
+    // So that its gets re-filled with entries from the new policy.
+    m_rController.removeEntries();
+}
+
 ClassificationCategoriesController::ClassificationCategoriesController(const uno::Reference<uno::XComponentContext>& rContext)
     : ClassificationCategoriesControllerBase(rContext, uno::Reference<frame::XFrame>(), OUString(".uno:ClassificationApply"))
     , m_pCategories(nullptr)
+    , m_xListener(new comphelper::ConfigurationListener("/org.openoffice.Office.Paths/Paths/Classification"))
+    , m_aPropertyListener(m_xListener, *this)
 {
+
 }
 
 ClassificationCategoriesController::~ClassificationCategoriesController()
@@ -93,6 +126,8 @@ void ClassificationCategoriesController::dispose() throw (uno::RuntimeException,
 
     svt::ToolboxController::dispose();
     m_pCategories.disposeAndClear();
+    m_aPropertyListener.dispose();
+    m_xListener->dispose();
 }
 
 uno::Reference<awt::XWindow> ClassificationCategoriesController::createItemWindow(const uno::Reference<awt::XWindow>& rParent) throw (uno::RuntimeException, std::exception)
@@ -146,6 +181,12 @@ void ClassificationCategoriesController::statusChanged(const frame::FeatureState
         m_pCategories->SelectEntry(rCategoryName);
 }
 
+void ClassificationCategoriesController::removeEntries()
+{
+    if (m_pCategories)
+        m_pCategories->Clear();
+}
+
 } // namespace sfx2
 
 extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface* SAL_CALL com_sun_star_sfx2_ClassificationCategoriesController_get_implementation(uno::XComponentContext* pContext, const uno::Sequence<uno::Any>&)