tdf#89329: use shared_ptr for pImpl in slidesorterbaropt

Change-Id: If5b7fd23448a584d1faebaf0a540e61f091471fa
Reviewed-on: https://gerrit.libreoffice.org/26331Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

include/svtools/slidesorterbaropt.hxx

@@ -25,6 +25,7 @@
 #include <osl/mutex.hxx>
 #include <rtl/ustring.hxx>
 #include <unotools/options.hxx>
+#include <memory>
 
 /** forward declaration to our private date container implementation
 
@@ -41,16 +42,6 @@ class SvtSlideSorterBarOptions_Impl;
 class SVT_DLLPUBLIC SvtSlideSorterBarOptions: public utl::detail::Options
 {
     public:
-        /** standard constructor and destructor
-
-            This will initialize an instance with default values.
-            We implement these class with a refcount mechanism! Every instance of this class increase it
-            at create and decrease it at delete time - but all instances use the same data container!
-            He is implemented as a static member ...
-
-            \sa    member m_nRefCount
-            \sa    member m_pDataContainer
-        */
         SvtSlideSorterBarOptions();
         virtual ~SvtSlideSorterBarOptions();
 
@@ -79,17 +70,7 @@ class SVT_DLLPUBLIC SvtSlideSorterBarOptions: public utl::detail::Options
         SVT_DLLPRIVATE static ::osl::Mutex& GetInitMutex();
 
     private:
-
-        /**
-            \attention
-            Don't initialize these static members in these headers!
-            \li Double defined symbols will be detected ...
-            \li and unresolved externals exist at linking time.
-            Do it in your source only.
-        */
-        static SvtSlideSorterBarOptions_Impl* m_pDataContainer    ;
-        static sal_Int32                      m_nRefCount         ;
-
+        std::shared_ptr<SvtSlideSorterBarOptions_Impl> m_pImpl;
 };
 
 #endif

svtools/source/config/slidesorterbaropt.cxx

@@ -55,7 +55,7 @@ class SvtSlideSorterBarOptions_Impl : public ConfigItem
     public:
 
          SvtSlideSorterBarOptions_Impl();
-        virtual ~SvtSlideSorterBarOptions_Impl();
+        ~SvtSlideSorterBarOptions_Impl() override;
 
         /** called for notify of configmanager
 
@@ -83,7 +83,7 @@ class SvtSlideSorterBarOptions_Impl : public ConfigItem
         bool m_bVisibleDrawView;
 
     private:
-        virtual void ImplCommit() override;
+        virtual void ImplCommit() final override;
 
         /** return list of key names of our configuration management which represent oue module tree
 
@@ -193,7 +193,8 @@ SvtSlideSorterBarOptions_Impl::SvtSlideSorterBarOptions_Impl()
 
 SvtSlideSorterBarOptions_Impl::~SvtSlideSorterBarOptions_Impl()
 {
-    assert(!IsModified()); // should have been committed
+    if (IsModified())
+        Commit();
 }
 
 static int lcl_MapPropertyName( const OUString& rCompare,
@@ -343,20 +344,20 @@ void SvtSlideSorterBarOptions_Impl::SetVisibleViewImpl( bool& bVisibleView, bool
     }
 }
 
-//  initialize static member, see definition for further information
-//  DON'T DO IT IN YOUR HEADER!
-SvtSlideSorterBarOptions_Impl* SvtSlideSorterBarOptions::m_pDataContainer    = nullptr  ;
-sal_Int32                      SvtSlideSorterBarOptions::m_nRefCount = 0     ;
+namespace {
+    std::weak_ptr<SvtSlideSorterBarOptions_Impl> g_pSlideSorterBarOptions;
+}
 
 SvtSlideSorterBarOptions::SvtSlideSorterBarOptions()
 {
     // Global access, must be guarded (multithreading!).
     MutexGuard aGuard( GetInitMutex() );
-    ++m_nRefCount;
-    // ... and initialize our data container only if it not already exist!
-    if( m_pDataContainer == nullptr )
+
+    m_pImpl = g_pSlideSorterBarOptions.lock();
+    if( !m_pImpl )
     {
-       m_pDataContainer = new SvtSlideSorterBarOptions_Impl;
+        m_pImpl = std::make_shared<SvtSlideSorterBarOptions_Impl>();
+        g_pSlideSorterBarOptions = m_pImpl;
     }
 }
 
@@ -364,75 +365,68 @@ SvtSlideSorterBarOptions::~SvtSlideSorterBarOptions()
 {
     // Global access, must be guarded (multithreading!)
     MutexGuard aGuard( GetInitMutex() );
-    --m_nRefCount;
-    // If last instance was deleted we must destroy our static data container!
-    if( m_nRefCount <= 0 )
-    {
-        if (m_pDataContainer->IsModified())
-            m_pDataContainer->Commit();
-        delete m_pDataContainer;
-        m_pDataContainer = nullptr;
-    }
+
+    m_pImpl.reset();
 }
 
 bool SvtSlideSorterBarOptions::GetVisibleImpressView() const
 {
-    return m_pDataContainer->m_bVisibleImpressView && !comphelper::LibreOfficeKit::isActive();
+    return m_pImpl->m_bVisibleImpressView && !comphelper::LibreOfficeKit::isActive();
 }
 
 void SvtSlideSorterBarOptions::SetVisibleImpressView(bool bVisible)
 {
-    m_pDataContainer->SetVisibleImpressView( bVisible );
+    m_pImpl->SetVisibleImpressView( bVisible );
 }
 
 bool SvtSlideSorterBarOptions::GetVisibleOutlineView() const
 {
-    return m_pDataContainer->m_bVisibleOutlineView;
+    return m_pImpl->m_bVisibleOutlineView;
 }
 
 void SvtSlideSorterBarOptions::SetVisibleOutlineView(bool bVisible)
 {
-    m_pDataContainer->SetVisibleOutlineView( bVisible );
+    m_pImpl->SetVisibleOutlineView( bVisible );
 }
 
 bool SvtSlideSorterBarOptions::GetVisibleNotesView() const
 {
-    return m_pDataContainer->m_bVisibleNotesView;
+    return m_pImpl->m_bVisibleNotesView;
 }
 
 void SvtSlideSorterBarOptions::SetVisibleNotesView(bool bVisible)
 {
-    m_pDataContainer->SetVisibleNotesView( bVisible );
+    m_pImpl->SetVisibleNotesView( bVisible );
 }
 
 bool SvtSlideSorterBarOptions::GetVisibleHandoutView() const
 {
-    return m_pDataContainer->m_bVisibleHandoutView;
+    return m_pImpl->m_bVisibleHandoutView;
 }
 
 void SvtSlideSorterBarOptions::SetVisibleHandoutView(bool bVisible)
 {
-    m_pDataContainer->SetVisibleHandoutView( bVisible );
+    m_pImpl->SetVisibleHandoutView( bVisible );
 }
 
 bool SvtSlideSorterBarOptions::GetVisibleSlideSorterView() const
 {
-    return m_pDataContainer->m_bVisibleSlideSorterView && !comphelper::LibreOfficeKit::isActive();
+    return m_pImpl->m_bVisibleSlideSorterView && !comphelper::LibreOfficeKit::isActive();
 }
 
 void SvtSlideSorterBarOptions::SetVisibleSlideSorterView(bool bVisible)
 {
-    m_pDataContainer->SetVisibleSlideSorterView( bVisible );
+    m_pImpl->SetVisibleSlideSorterView( bVisible );
 }
 
 bool SvtSlideSorterBarOptions::GetVisibleDrawView() const
 {
-    return m_pDataContainer->m_bVisibleDrawView;
+    return m_pImpl->m_bVisibleDrawView;
 }
 
 void SvtSlideSorterBarOptions::SetVisibleDrawView(bool bVisible)
 {
-    m_pDataContainer->SetVisibleDrawView( bVisible );
+    m_pImpl->SetVisibleDrawView( bVisible );
 }
 
 namespace