refactor ensuring polygon has at least a line in it

just split that out into a standalone function, no logic
change

Change-Id: I061d5d716b3fc2a9fb6385e7fb249ce300752130

svx/source/sdr/contact/viewcontactofsdrpathobj.cxx

@@ -40,26 +40,14 @@ namespace sdr
         {
         }
 
-        drawinglayer::primitive2d::Primitive2DSequence ViewContactOfSdrPathObj::createViewIndependentPrimitive2DSequence() const
+        static sal_uInt32 ensureGeometry(basegfx::B2DPolyPolygon& rUnitPolyPolygon)
         {
-            const SfxItemSet& rItemSet = GetPathObj().GetMergedItemSet();
-            const drawinglayer::attribute::SdrLineFillShadowTextAttribute aAttribute(
-                drawinglayer::primitive2d::createNewSdrLineFillShadowTextAttribute(
-                    rItemSet,
-                    GetPathObj().getText(0),
-                    false));
-            basegfx::B2DPolyPolygon aUnitPolyPolygon(GetPathObj().GetPathPoly());
-            Point aGridOff = GetPathObj().GetGridOffset();
-            // Hack for calc, transform position of object according
-            // to current zoom so as objects relative position to grid
-            // appears stable
-            aUnitPolyPolygon.transform( basegfx::tools::createTranslateB2DHomMatrix( aGridOff.X(), aGridOff.Y() ) );
-            sal_uInt32 nPolyCount(aUnitPolyPolygon.count());
+            sal_uInt32 nPolyCount(rUnitPolyPolygon.count());
             sal_uInt32 nPointCount(0);
 
             for(sal_uInt32 a(0); a < nPolyCount; a++)
             {
-                nPointCount += aUnitPolyPolygon.getB2DPolygon(a).count();
+                nPointCount += rUnitPolyPolygon.getB2DPolygon(a).count();
             }
 
             if(!nPointCount)
@@ -68,11 +56,30 @@ namespace sdr
                 basegfx::B2DPolygon aFallbackLine;
                 aFallbackLine.append(basegfx::B2DPoint(0.0, 0.0));
                 aFallbackLine.append(basegfx::B2DPoint(1000.0, 1000.0));
-                aUnitPolyPolygon = basegfx::B2DPolyPolygon(aFallbackLine);
+                rUnitPolyPolygon = basegfx::B2DPolyPolygon(aFallbackLine);
 
                 nPolyCount = 1;
             }
 
+            return nPolyCount;
+        }
+
+        drawinglayer::primitive2d::Primitive2DSequence ViewContactOfSdrPathObj::createViewIndependentPrimitive2DSequence() const
+        {
+            const SfxItemSet& rItemSet = GetPathObj().GetMergedItemSet();
+            const drawinglayer::attribute::SdrLineFillShadowTextAttribute aAttribute(
+                drawinglayer::primitive2d::createNewSdrLineFillShadowTextAttribute(
+                    rItemSet,
+                    GetPathObj().getText(0),
+                    false));
+            basegfx::B2DPolyPolygon aUnitPolyPolygon(GetPathObj().GetPathPoly());
+            Point aGridOff = GetPathObj().GetGridOffset();
+            // Hack for calc, transform position of object according
+            // to current zoom so as objects relative position to grid
+            // appears stable
+            aUnitPolyPolygon.transform( basegfx::tools::createTranslateB2DHomMatrix( aGridOff.X(), aGridOff.Y() ) );
+            sal_uInt32 nPolyCount(ensureGeometry(aUnitPolyPolygon));
+
             // prepare object transformation and unit polygon (direct model data)
             basegfx::B2DHomMatrix aObjectMatrix;
             const bool bIsLine(