tdf#58122 FILESAVE: XLSX - Cell RTL direction state not saved

Current behavior:
The direction of the sheet is set to default from left to right

Expected behavior:
The action of changing the direction from left to right to become from right to left

Solution:
Added export for text writting direction.

Now <alignment readingorder="2"> export properly

Change-Id: I0a49ba0e458cbd6a7feae8e205ae583b7da30d0b

sc/qa/unit/subsequent_export-test.cxx

@@ -155,6 +155,7 @@ public:
     void testMoveCellAnchoredShapes();
     void testMatrixMultiplication();
     void testPreserveTextWhitespaceXLSX();
+    void testTextDirection();
 
     void testRefStringXLSX();
     void testRefStringConfigXLSX();
@@ -221,6 +222,7 @@ public:
     CPPUNIT_TEST(testHyperlinkXLSX);
     CPPUNIT_TEST(testMoveCellAnchoredShapes);
     CPPUNIT_TEST(testMatrixMultiplication);
+    CPPUNIT_TEST(testTextDirection);
 
     CPPUNIT_TEST(testRefStringXLSX);
     CPPUNIT_TEST(testRefStringConfigXLSX);
@@ -2988,7 +2990,6 @@ void ScExportTest::testMatrixMultiplication()
     xDocSh->DoClose();
 }
 
-
 void ScExportTest::testRefStringXLSX()
 {
     ScDocShellRef xDocSh = loadDoc("ref_string.", FORMAT_XLSX);
@@ -3088,6 +3089,18 @@ void ScExportTest::testHeaderImage()
     CPPUNIT_ASSERT(aURL.startsWith("vnd.sun.star.GraphicObject:"));
 }
 
+void ScExportTest::testTextDirection()
+{
+    ScDocShellRef xDocSh = loadDoc("writingMode.", FORMAT_XLSX);
+    CPPUNIT_ASSERT(xDocSh.Is());
+
+    xmlDocPtr pDoc = XPathHelper::parseExport(&(*xDocSh), m_xSFactory, "xl/styles.xml", FORMAT_XLSX);
+    CPPUNIT_ASSERT(pDoc);
+
+    assertXPath(pDoc, "/x:styleSheet/x:cellXfs/x:xf[2]/x:alignment", "readingOrder", "1");//LTR
+    assertXPath(pDoc, "/x:styleSheet/x:cellXfs/x:xf[3]/x:alignment", "readingOrder", "2");//RTL
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(ScExportTest);
 
 CPPUNIT_PLUGIN_IMPLEMENT();

sc/source/filter/excel/xestyle.cxx

@@ -1621,7 +1621,7 @@ void XclExpCellAlign::SaveXml( XclExpXmlStream& rStrm ) const
             // OOXTODO: XML_relativeIndent,     mnIndent?
             // OOXTODO: XML_justifyLastLine,
             XML_shrinkToFit,        XclXmlUtils::ToPsz( mbShrink ),
-            // OOXTODO: XML_readingOrder,
+            XML_readingOrder, mnTextDir == EXC_XF_TEXTDIR_CONTEXT ? NULL : OString::number(  mnTextDir ).getStr(),
             FSEND );
 }