vclptr: move down impl. to OutputDevice

Ultimately we will want to ref-count & VclPtr OutputDevice instances
separately from Window - but for now merge. This helps fix the amazing
lifecycle foo in toolkit/

Change-Id: If40ee9f645c87aff08815926205e908205bdd67a

1 files changed, 29 insertions, 1 deletions

diff --git a/include/vcl/outdev.hxx b/include/vcl/outdev.hxx
index 4cf24545c928..e53fc65a982e 100644
--- a/include/vcl/outdev.hxx
+++ b/include/vcl/outdev.hxx
@@ -263,6 +263,26 @@ class VCL_DLLPUBLIC OutputDevice
     friend class vcl::PDFWriterImpl;
     friend void ImplHandleResize( vcl::Window* pWindow, long nNewWidth, long nNewHeight );
 
+    // All of this will need to be replicated in Window
+    // or a shared base-class as/when we can break the
+    // OutputDevice -> Window inheritance.
+private:
+    mutable int mnRefCnt;         // reference count
+
+    template<typename T> friend class ::rtl::Reference;
+    template<typename T> friend class ::VclPtr;
+
+    inline void acquire() const
+    {
+        mnRefCnt++;
+    }
+
+    inline void release() const
+    {
+        if (!--mnRefCnt)
+            delete const_cast<OutputDevice*>(this);
+    }
+
 private:
     OutputDevice(const OutputDevice&) SAL_DELETED_FUNCTION;
     OutputDevice& operator=(const OutputDevice&) SAL_DELETED_FUNCTION;
@@ -352,6 +372,7 @@ private:
     mutable bool                    mbTextSpecial : 1;
     mutable bool                    mbRefPoint : 1;
     mutable bool                    mbEnableRTL : 1;
+    mutable bool                    mbDisposed : 1;
 
     /** @name Initialization and accessor functions
      */
@@ -359,10 +380,17 @@ private:
 
 protected:
                                 OutputDevice();
-
 public:
     virtual                     ~OutputDevice();
 
+protected:
+    /// release all references to other objects.
+    virtual void                        dispose();
+
+public:
+    /// call the dispose() method if we have not already been disposed.
+    void                                disposeOnce();
+
 public:
 
     /** Get the graphic context that the output device uses to draw on.