tdf#90097 RTF import: handle fRelFlipV property for line shapes

Can be extended later in every direction: fFlipV, fRelFlipH, non-line
shapes.  See oox::drawingml::Shape::createAndInsert() on why the
convertMm100ToTwip() conversion is necessary.

Change-Id: Ifee401dd8dd392c2c9ff85cc871ca0169fcf930b
Reviewed-on: https://gerrit.libreoffice.org/24385
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>
(cherry picked from commit 6046062719f30849cd97161c6a89d27a0b0d2a20)

2 files changed, 32 insertions, 0 deletions

diff --git a/writerfilter/Library_writerfilter.mk b/writerfilter/Library_writerfilter.mk
index c81ff5651e05..5ec43d2b0937 100644
--- a/writerfilter/Library_writerfilter.mk
+++ b/writerfilter/Library_writerfilter.mk
@@ -35,6 +35,7 @@ $(eval $(call gb_Library_add_defs,writerfilter,\
 ))
 
 $(eval $(call gb_Library_use_libraries,writerfilter,\
+    basegfx \
     comphelper \
     cppu \
     cppuhelper \
diff --git a/writerfilter/source/rtftok/rtfsdrimport.cxx b/writerfilter/source/rtftok/rtfsdrimport.cxx
index fcc20d4ee421..32846edd7c4b 100644
--- a/writerfilter/source/rtftok/rtfsdrimport.cxx
+++ b/writerfilter/source/rtftok/rtfsdrimport.cxx
@@ -33,6 +33,7 @@
 #include <oox/drawingml/shapepropertymap.hxx>
 #include <oox/helper/propertyset.hxx>
 #include <boost/logic/tribool.hpp>
+#include <basegfx/matrix/b2dhommatrix.hxx>
 
 using namespace com::sun::star;
 
@@ -346,6 +347,7 @@ void RTFSdrImport::resolve(RTFShape& rShape, bool bClose, ShapeOrPict const shap
     boost::optional<sal_Int16> oRelativeWidth, oRelativeHeight;
     sal_Int16 nRelativeWidthRelation = text::RelOrientation::PAGE_FRAME;
     sal_Int16 nRelativeHeightRelation = text::RelOrientation::PAGE_FRAME;
+    boost::logic::tribool obRelFlipV(boost::logic::indeterminate);
 
     bool bCustom(false);
     int const nType = initShape(xShape, xPropertySet, bCustom, rShape, bClose, shapeOrPict);
@@ -778,6 +780,8 @@ void RTFSdrImport::resolve(RTFShape& rShape, bool bClose, ShapeOrPict const shap
             while (nCharIndex >= 0);
             rShape.aWrapPolygonSprms = aPolygonSprms;
         }
+        else if (i->first == "fRelFlipV")
+            obRelFlipV = i->second.toInt32() == 1;
         else
             SAL_INFO("writerfilter", "TODO handle shape property '" << i->first << "':'" << i->second << "'");
     }
@@ -836,6 +840,33 @@ void RTFSdrImport::resolve(RTFShape& rShape, bool bClose, ShapeOrPict const shap
     }
     if (!aGeometry.empty() && xPropertySet.is() && !m_bTextFrame)
         xPropertySet->setPropertyValue("CustomShapeGeometry", uno::Any(comphelper::containerToSequence(aGeometry)));
+    if (!boost::logic::indeterminate(obRelFlipV) && xPropertySet.is())
+    {
+        if (nType == ESCHER_ShpInst_Line)
+        {
+            // Line shape inside group shape: get the polygon sequence and transform it.
+            uno::Sequence< uno::Sequence<awt::Point> > aPolyPolySequence;
+            if ((xPropertySet->getPropertyValue("PolyPolygon") >>= aPolyPolySequence) && aPolyPolySequence.hasElements())
+            {
+                uno::Sequence<awt::Point>& rPolygon = aPolyPolySequence[0];
+                basegfx::B2DPolygon aPoly;
+                for (sal_Int32 i = 0; i < rPolygon.getLength(); ++i)
+                {
+                    const awt::Point& rPoint = rPolygon[i];
+                    aPoly.insert(i, basegfx::B2DPoint(rPoint.X, rPoint.Y));
+                }
+                basegfx::B2DHomMatrix aTransformation;
+                aTransformation.scale(1.0, obRelFlipV ? -1.0 : 1.0);
+                aPoly.transform(aTransformation);
+                for (sal_Int32 i = 0; i < rPolygon.getLength(); ++i)
+                {
+                    basegfx::B2DPoint aPoint(aPoly.getB2DPoint(i));
+                    rPolygon[i] = awt::Point(static_cast<sal_Int32>(convertMm100ToTwip(aPoint.getX())), static_cast<sal_Int32>(convertMm100ToTwip(aPoint.getY())));
+                }
+                xPropertySet->setPropertyValue("PolyPolygon", uno::makeAny(aPolyPolySequence));
+            }
+        }
+    }
 
     // Set position and size
     if (xShape.is())