DOC export: factor out wrap polygon handling to to sw::util

So that it'll be possible to reuse it in the DOCX exporter.

Change-Id: Ib7371c92c4fd93d7c6f3271ca81311bac8f1a1a7

sw/source/filter/ww8/writerhelper.cxx

@@ -660,6 +660,36 @@ namespace sw
             }
         }
 
+        Polygon CorrectWordWrapPolygonForExport(const PolyPolygon& rPolyPoly, const SwNoTxtNode* pNd)
+        {
+            Polygon aPoly(PolygonFromPolyPolygon(rPolyPoly));
+            const Size &rOrigSize = pNd->GetGraphic().GetPrefSize();
+            Fraction aMapPolyX(ww::nWrap100Percent, rOrigSize.Width());
+            Fraction aMapPolyY(ww::nWrap100Percent, rOrigSize.Height());
+            aPoly.Scale(aMapPolyX, aMapPolyY);
+
+            /*
+             a) stretch right bound by 15twips
+             b) shrink bottom bound to where it would have been in word
+             c) Move it to the left by 15twips
+
+             See the import for details
+            */
+            const Size &rSize = pNd->GetTwipSize();
+            Fraction aMoveHack(ww::nWrap100Percent, rSize.Width());
+            aMoveHack *= Fraction(15, 1);
+            long nMove(aMoveHack);
+
+            Fraction aHackX(ww::nWrap100Percent + nMove,
+                    ww::nWrap100Percent);
+            Fraction aHackY(ww::nWrap100Percent - nMove,
+                    ww::nWrap100Percent);
+            aPoly.Scale(aHackX, aHackY);
+
+            aPoly.Move(-nMove, 0);
+            return aPoly;
+        }
+
         Size GetSwappedInSize(const SwNoTxtNode& rNd)
         {
             Size aGrTwipSz(rNd.GetTwipSize());

sw/source/filter/ww8/writerhelper.hxx

@@ -741,6 +741,9 @@ namespace sw
         */
         Polygon PolygonFromPolyPolygon(const PolyPolygon &rPolyPoly);
 
+        /// Undo all scaling / move tricks of the wrap polygon done during import.
+        Polygon CorrectWordWrapPolygonForExport(const PolyPolygon& rPolyPoly, const SwNoTxtNode* pNd);
+
         /** Make setting a drawing object's layer in a Writer document easy
 
             Word has the simple concept of a drawing object either in the

sw/source/filter/ww8/wrtw8esh.cxx

@@ -2106,32 +2106,7 @@ sal_Int32 SwEscherEx::WriteFlyFrameAttr(const SwFrmFmt& rFmt, MSO_SPT eShapeType
             const PolyPolygon *pPolyPoly = pNd->HasContour();
             if (pPolyPoly && pPolyPoly->Count())
             {
-                Polygon aPoly(PolygonFromPolyPolygon(*pPolyPoly));
-                const Size &rOrigSize = pNd->GetGraphic().GetPrefSize();
-                Fraction aMapPolyX(ww::nWrap100Percent, rOrigSize.Width());
-                Fraction aMapPolyY(ww::nWrap100Percent, rOrigSize.Height());
-                aPoly.Scale(aMapPolyX, aMapPolyY);
-
-                /*
-                 a) stretch right bound by 15twips
-                 b) shrink bottom bound to where it would have been in word
-                 c) Move it to the left by 15twips
-
-                 See the import for details
-                */
-                const Size &rSize = pNd->GetTwipSize();
-                Fraction aMoveHack(ww::nWrap100Percent, rSize.Width());
-                aMoveHack *= Fraction(15, 1);
-                long nMove(aMoveHack);
-
-                Fraction aHackX(ww::nWrap100Percent + nMove,
-                        ww::nWrap100Percent);
-                Fraction aHackY(ww::nWrap100Percent - nMove,
-                        ww::nWrap100Percent);
-                aPoly.Scale(aHackX, aHackY);
-
-                aPoly.Move(-nMove, 0);
-
+                Polygon aPoly = CorrectWordWrapPolygonForExport(*pPolyPoly, pNd);
                 SvMemoryStream aPolyDump;
                 aPolyDump.SetNumberFormatInt(NUMBERFORMAT_INT_LITTLEENDIAN);