Fix error in handling 'z' for svg:d string parsing

Previously 'z' did not update the current point to the start
point of the subpath, as required by
http://www.w3.org/TR/SVG/paths.html#PathDataClosePathCommand. Fixed
now, and adapted all the unit tests.

basegfx/inc/basegfx/polygon/b2dpolypolygontools.hxx

@@ -123,8 +123,7 @@ namespace basegfx
         /** Read poly-polygon from SVG.
 
             This function imports a poly-polygon from an SVG-D
-            attribute. Currently, elliptical arc elements are not yet
-            supported (and ignored during parsing).
+            attribute.
 
             @param o_rPolyPoly
             The output poly-polygon

basegfx/source/polygon/b2dsvgpolypolygon.cxx

@@ -239,6 +239,14 @@ namespace basegfx
 
                         // remember closed state of current polygon
                         bIsClosed = true;
+
+                        // update current point - we're back at the start
+                        if( aCurrPoly.count() )
+                        {
+                            const B2DPoint aFirst( aCurrPoly.getB2DPoint(0) );
+                            nLastX = aFirst.getX();
+                            nLastY = aFirst.getY();
+                        }
                         break;
                     }
 
@@ -1033,6 +1041,8 @@ namespace basegfx
                     if(aPolygon.isClosed())
                     {
                         aResult.append(lcl_getCommand('Z', 'z', bUseRelativeCoordinates));
+                        // return to first point
+                        aCurrentSVGPosition = aPolygon.getB2DPoint(0);
                     }
                 }
             }

basegfx/test/clipstate.cxx

@@ -136,8 +136,9 @@ public:
     void verifySimpleRange()
     {
         const char* unionSvg="m100 10v90h-90v10h-20v-10h-90v-90h-10v-20h10v-90h90v-10h20v10h90v90h10v20z";
-        const char* intersectSvg="m-100 10v-20h10v20zm80 90v-10h20v10zm-20-190v-10h20v10zm80 100v-20h10v20z";
-        const char* xorSvg="m-100 10h10v-20h-10zm90 110h20v-10h-20zm0-180h20v-10h-20zm100 110h10v-20h-10zm10 20v90h-90v10h-20v-10h-90v-90h-10v-20h10v-90h90v-10h20v10h90v90h10v20z";
+        const char* intersectSvg="m-100 10v-20h10v20zm90 90v-10h20v10zm0-190v-10h20v10zm100 100v-20h10v20z";
+        const char* xorSvg="m-100 10h10v-20h-10zm90 90h20v-10h-20zm0-190h20v-10h-20zm100 100h10v-20h-10z"
+                           "m10 0v90h-90v10h-20v-10h-90v-90h-10v-20h10v-90h90v-10h20v10h90v90h10v20z";
         const char* subtractSvg="m-90 10v-20h-10v-90h90v10h20v-10h90v90h-10v20h10v90h-90v-10h-20v10h-90v-90z";
 
         CPPUNIT_ASSERT_MESSAGE("cleared clip stays empty under union operation",
@@ -164,7 +165,7 @@ public:
         aMixedClip.subtractRange(B2DRange(-150,-20,0,20));
         aMixedClip.xorRange(B2DRange(-150,-150,150,150));
 
-        const char* mixedClipSvg="m0 0v20h-100v80h90v10h20v-10h90v-90h10v-20h-10v-90h-80v100zm-40-20v-80h-80v80zm-50 170v-300h300v300z";
+        const char* mixedClipSvg="m0 0v20h-100v80h90v10h20v-10h90v-90h10v-20h-10v-90h-80v100zm-20-20v-80h-80v80zm-130 170v-300h300v300z";
         verifyPoly("mixed clip", mixedClipSvg, aMixedClip);
     }
 

basegfx/test/genericclipper.cxx

@@ -121,13 +121,13 @@ public:
 
     void validateOr()
     {
-        const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm75 10v-50h-50v50z";
+        const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm75 100v-50h-50v50z"; 
         validate("validateOr", pValid, &tools::solvePolygonOperationOr);
     }
 
     void validateXor()
     {
-        const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm0 10h20v-10h-20zm75 10v-50h-50v50z";
+        const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm0 100h20v-10h-20zm75 0v-50h-50v50z";
         validate("validateXor", pValid, &tools::solvePolygonOperationXor);
     }
 
@@ -139,10 +139,23 @@ public:
 
     void validateDiff()
     {
-        const char* pValid="m0 90v-90h100v150h-75v-50h-5v-10zm55 10v-50h-50v50z";
+        const char* pValid="m0 90v-90h100v150h-75v-50h-5v-10zm75 10v-50h-50v50z";
         validate("validateDiff", pValid, &tools::solvePolygonOperationDiff);
     }
 
+    void checkCrossoverSolver()
+    {
+        B2DPolyPolygon aPoly;
+        tools::importFromSvgD(
+            aPoly,
+            ::rtl::OUString(
+                RTL_CONSTASCII_USTRINGPARAM(
+                    "m0 0 v 5  h 3 h 1 h 1 h 1 v -2 v -3 z"
+                    "m3 7 v -2 h 1 h 1 h 1 v -2 h 1 v 3 z")));
+
+        tools::solveCrossovers(aPoly);
+    }
+
     // Change the following lines only, if you add, remove or rename
     // member functions of the current class,
     // because these macros are need by auto register mechanism.
@@ -152,6 +165,7 @@ public:
     CPPUNIT_TEST(validateXor);
     CPPUNIT_TEST(validateAnd);
     CPPUNIT_TEST(validateDiff);
+    CPPUNIT_TEST(checkCrossoverSolver);
     CPPUNIT_TEST_SUITE_END();
 };