rework ScCaptionPtr to have a distinct head element

Not only saves a pointer per list element, but future versions could
hold a document pointer and/or drawing layer's draw page as well.

Change-Id: I85e05981239223bec88c47f2ebe4c22e50cd9a0d

1 files changed, 11 insertions, 4 deletions

diff --git a/sc/inc/postit.hxx b/sc/inc/postit.hxx
index ea4a43d9d4de..ad671fb649c2 100644
--- a/sc/inc/postit.hxx
+++ b/sc/inc/postit.hxx
@@ -72,11 +72,18 @@ public:
     oslInterlockedCount getRefs() const;
 
 private:
-    ScCaptionPtr*               mpHead;     ///< points to the "master" entry
-    mutable ScCaptionPtr*       mpNext;     ///< next in list
-    SdrCaptionObj*              mpCaption;  ///< the caption object, managed by head master
-    mutable oslInterlockedCount mnRefs;     ///< use count, managed by head master
 
+    struct Head
+    {
+        ScCaptionPtr*       mpFirst;    ///< first in list
+        oslInterlockedCount mnRefs;     ///< use count
+    };
+
+    Head*                 mpHead;       ///< points to the "master" entry
+    mutable ScCaptionPtr* mpNext;       ///< next in list
+    SdrCaptionObj*        mpCaption;    ///< the caption object, managed by head master
+
+    void newHead();             //< Allocate a new Head and init.
     void incRef() const;
     bool decRef() const;        //< @returns <TRUE/> if the last reference was decremented.
     void decRefAndDestroy();    //< Destroys caption object if the last reference was decremented.