related tdf#63561 docx: styles inherit tabstops too

Add import and export support for style-parent
tabstop inheritance.

This patch is dependent on GetPropertyFromStyleSheet
commit 39171b82b245a7589b9258337a18d6dd281f8ed2

Change-Id: I0245d0e08f140b6cb473c96cffa6f5a4ceff8944
Reviewed-on: https://gerrit.libreoffice.org/57278
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>

sw/qa/extras/ooxmlexport/ooxmlexport11.cxx

@@ -58,7 +58,13 @@ DECLARE_OOXMLEXPORT_TEST(testTdf46938_clearTabStop, "tdf46938_clearTabStop.docx"
 
 DECLARE_OOXMLEXPORT_TEST(testTdf63561_clearTabs, "tdf63561_clearTabs.docx")
 {
-    // MSO2013 gives 5,7, and 4 respectively
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(5), getProperty< uno::Sequence<style::TabStop> >(getParagraph(1), "ParaTabStops").getLength());
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(7), getProperty< uno::Sequence<style::TabStop> >(getParagraph(3), "ParaTabStops").getLength());
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(4), getProperty< uno::Sequence<style::TabStop> >(getParagraph(4), "ParaTabStops").getLength());
+}
+
+DECLARE_OOXMLEXPORT_TEST(testTdf63561_clearTabs2, "tdf63561_clearTabs2.docx")
+{
     CPPUNIT_ASSERT_EQUAL(sal_Int32(1), getProperty< uno::Sequence<style::TabStop> >(getParagraph(1), "ParaTabStops").getLength());
     CPPUNIT_ASSERT_EQUAL(sal_Int32(3), getProperty< uno::Sequence<style::TabStop> >(getParagraph(3), "ParaTabStops").getLength());
     CPPUNIT_ASSERT_EQUAL(sal_Int32(4), getProperty< uno::Sequence<style::TabStop> >(getParagraph(4), "ParaTabStops").getLength());

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -7707,7 +7707,11 @@ static void impl_WriteTabElement( FSHelperPtr const & pSerializer,
 
 void DocxAttributeOutput::ParaTabStop( const SvxTabStopItem& rTabStop )
 {
-    const SvxTabStopItem* pInheritedTabs = GetExport().m_pStyAttr ? GetExport().m_pStyAttr->GetItem<SvxTabStopItem>(RES_PARATR_TABSTOP) : nullptr;
+    const SvxTabStopItem* pInheritedTabs = nullptr;
+    if ( GetExport().m_pStyAttr )
+        pInheritedTabs = GetExport().m_pStyAttr->GetItem<SvxTabStopItem>(RES_PARATR_TABSTOP);
+    else if ( GetExport().m_pCurrentStyle && GetExport().m_pCurrentStyle->DerivedFrom() )
+        pInheritedTabs = GetExport().m_pCurrentStyle->DerivedFrom()->GetAttrSet().GetItem<SvxTabStopItem>(RES_PARATR_TABSTOP);
     const sal_uInt16 nInheritedTabCount = pInheritedTabs ? pInheritedTabs->Count() : 0;
     const sal_uInt16 nCount = rTabStop.Count();
 

writerfilter/source/dmapper/DomainMapper.cxx

@@ -1840,7 +1840,7 @@ void DomainMapper::sprmWithProps( Sprm& rSprm, const PropertyMapPtr& rContext )
         // fdo#81033: for RTF, a tab stop is inherited from the style if it
         // is also applied to the paragraph directly, and cleared if it is
         // not applied to the paragraph directly => don't InitTabStopFromStyle
-        if (!IsStyleSheetImport() && !IsRTFImport())
+        if ( !IsRTFImport() )
         {
             uno::Any aValue = m_pImpl->GetPropertyFromStyleSheet(PROP_PARA_TAB_STOPS);
             uno::Sequence< style::TabStop > aStyleTabStops;