sw_redlinehide_3: adapt SwContentTree/SwOutlineContent to gaps

The SwOutlineContent::GetPos() returns the outline position in the
document model / IDocumentOutlineNodesAccess; rename it to make that
more clear.

Also it's already possible to have gaps in the list entries by setting
the outline level so that inner levels are filtered; the
SwContentTree::ExecCommand() doesn't appear to handle this properly,
it needs some tweaks to skip over the outline nodes that don't have list
entries.

The GetYPos() does not contain the outline index, it contains the list
entry index.

Change-Id: Ifae0b9648ce61bb9aa470172ef989b2532370138

sw/source/uibase/inc/content.hxx

@@ -49,7 +49,7 @@ class SwOutlineContent : public SwContent
             SwContent(pCnt, rName, nYPos),
             nOutlinePos(nArrPos), nOutlineLevel(nLevel), bIsMoveable(bMove) {}
 
-    sal_uInt16  GetPos() const {return nOutlinePos;}
+    SwOutlineNodes::size_type GetOutlinePos() const {return nOutlinePos;}
     sal_uInt8   GetOutlineLevel() const {return nOutlineLevel;}
     bool        IsMoveable() const {return bIsMoveable;};
 };

sw/source/uibase/inc/swcont.hxx

@@ -72,10 +72,9 @@ class SwContent : public SwTypeNumber
     const SwContentType*    pParent;
     OUString const          sContentName;
     long const              nYPosition;
-        // most subclasses appear to use this for a tools/gen.hxx-style
-        // geometric Y position, while SwOutlineContent wants to store a
-        // SwOutlineNodes::size_type value (where all such values used in
-        // practice hopefully fit into 'long')
+        // some subclasses appear to use this for a tools/gen.hxx-style
+        // geometric Y position, while e.g. SwOutlineContent wants to store
+        // the index in its subtree
     bool                    bInvisible;
 public:
         SwContent(const SwContentType* pCnt, const OUString& rName, long nYPos );
@@ -96,8 +95,6 @@ public:
         return ListBox::NaturalSortCompare(sContentName, rCont.sContentName) < 0;
     }
 
-    long        GetYPos() const {return nYPosition;}
-
     bool        IsInvisible() const {return bInvisible;}
     void        SetInvisible(){ bInvisible = true;}
 };