sw btlr writing mode: implement ODF filter

An easy way would be to just extend aXML_WritingDirection_Enum, but then
we would write the new attribute value to a non-extension namespace.

So special case the new attribute value during both import and export
(and only for table cells as a start).

Change-Id: I431bf99693c4a3452e91f241bd2f0fcfc72c68fd
Reviewed-on: https://gerrit.libreoffice.org/67770Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

include/xmloff/xmltoken.hxx

@@ -2183,6 +2183,7 @@ namespace xmloff { namespace token {
 
         XML_RL_TB,
         XML_TB_LR,
+        XML_BT_LR,
         XML_LR,
         XML_RL,
         XML_TB,

schema/libreoffice/OpenDocument-schema-v1.3+libreoffice.rng

@@ -2323,6 +2323,17 @@ xmlns:loext="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.
     </rng:optional>
   </rng:define>
 
+  <!-- TODO no proposal -->
+  <rng:define name="common-writing-mode-attlist" combine="interleave">
+    <rng:optional>
+      <rng:attribute name="loext:writing-mode">
+        <rng:choice>
+          <rng:value>bt-lr</rng:value>
+        </rng:choice>
+      </rng:attribute>
+    </rng:optional>
+  </rng:define>
+
   <!-- just a test-case for user-defined attributes, move along, nothing to see here... -->
   <rng:define name="style-table-cell-properties-attlist" combine="interleave">
     <rng:optional>

sw/qa/extras/odfexport/odfexport.cxx

@@ -32,6 +32,7 @@
 #include <com/sun/star/document/XEmbeddedObjectSupplier.hpp>
 #include <com/sun/star/text/XTextEmbeddedObjectsSupplier.hpp>
 #include <com/sun/star/text/XTextField.hpp>
+#include <com/sun/star/text/WritingMode2.hpp>
 #include <comphelper/storagehelper.hxx>
 #include <comphelper/fileformat.h>
 #include <comphelper/propertysequence.hxx>
@@ -1391,6 +1392,25 @@ DECLARE_ODFEXPORT_TEST(testWhitespace, "whitespace.odt")
     CPPUNIT_ASSERT(!xPortions->hasMoreElements());
 }
 
+DECLARE_ODFEXPORT_TEST(testBtlrCell, "btlr-cell.odt")
+{
+    // Without the accompanying fix in place, this test would have failed, as
+    // the btlr text direction in the A1 cell was lost on ODF import and
+    // export.
+    uno::Reference<text::XTextTablesSupplier> xSupplier(mxComponent, uno::UNO_QUERY);
+    uno::Reference<container::XNameAccess> xTables = xSupplier->getTextTables();
+    uno::Reference<text::XTextTable> xTable(xTables->getByName("Table1"), uno::UNO_QUERY);
+    uno::Reference<beans::XPropertySet> xA1(xTable->getCellByName("A1"), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(text::WritingMode2::BT_LR, getProperty<sal_Int16>(xA1, "WritingMode"));
+
+    uno::Reference<beans::XPropertySet> xB1(xTable->getCellByName("B1"), uno::UNO_QUERY);
+    auto nActual = getProperty<sal_Int16>(xB1, "WritingMode");
+    CPPUNIT_ASSERT(nActual == text::WritingMode2::LR_TB || nActual == text::WritingMode2::CONTEXT);
+
+    uno::Reference<beans::XPropertySet> xC1(xTable->getCellByName("C1"), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(text::WritingMode2::TB_RL, getProperty<sal_Int16>(xC1, "WritingMode"));
+}
+
 DECLARE_ODFEXPORT_TEST(testFdo86963, "fdo86963.odt")
 {
     // Export of this document failed with beans::UnknownPropertyException.

sw/source/filter/xml/xmlexpit.cxx

@@ -46,6 +46,7 @@
 #include <editeng/formatbreakitem.hxx>
 #include <editeng/keepitem.hxx>
 #include <editeng/brushitem.hxx>
+#include <editeng/frmdiritem.hxx>
 #include <fmtpdsc.hxx>
 #include <fmtornt.hxx>
 #include <fmtfsize.hxx>
@@ -197,16 +198,41 @@ void SvXMLExportItemMapper::exportXML( const SvXMLExport& rExport,
     }
     else if( 0 == (rEntry.nMemberId & MID_SW_FLAG_ELEMENT_ITEM_EXPORT) )
     {
-        OUString aValue;
-        if( QueryXMLValue(rItem, aValue,
-                          static_cast< sal_uInt16 >(
-                                          rEntry.nMemberId & MID_SW_FLAG_MASK ),
-                             rUnitConverter ) )
+        bool bDone = false;
+        switch (rItem.Which())
         {
-            const OUString sName(
-                rNamespaceMap.GetQNameByKey( rEntry.nNameSpace,
-                                             GetXMLToken(rEntry.eLocalName)));
-            rAttrList.AddAttribute( sName, aValue );
+            case RES_FRAMEDIR:
+            {
+                // Write bt-lr to the extension namespace, handle other values
+                // below.
+                auto pDirection = static_cast<const SvxFrameDirectionItem*>(&rItem);
+                if (rEntry.nNameSpace == XML_NAMESPACE_LO_EXT
+                    && pDirection->GetValue() == SvxFrameDirection::Vertical_LR_BT)
+                {
+                    const OUString sName(rNamespaceMap.GetQNameByKey(
+                        XML_NAMESPACE_LO_EXT, GetXMLToken(XML_WRITING_MODE)));
+                    rAttrList.AddAttribute(sName, GetXMLToken(XML_BT_LR));
+                }
+                if (rEntry.nNameSpace == XML_NAMESPACE_LO_EXT
+                    || pDirection->GetValue() == SvxFrameDirection::Vertical_LR_BT)
+                    bDone = true;
+                break;
+            }
+        }
+
+        if (!bDone)
+        {
+            OUString aValue;
+            if( QueryXMLValue(rItem, aValue,
+                              static_cast< sal_uInt16 >(
+                                              rEntry.nMemberId & MID_SW_FLAG_MASK ),
+                                 rUnitConverter ) )
+            {
+                const OUString sName(
+                    rNamespaceMap.GetQNameByKey( rEntry.nNameSpace,
+                                                 GetXMLToken(rEntry.eLocalName)));
+                rAttrList.AddAttribute( sName, aValue );
+            }
         }
     }
 }

sw/source/filter/xml/xmlimpit.cxx

@@ -42,6 +42,7 @@
 #include <editeng/formatbreakitem.hxx>
 #include <editeng/keepitem.hxx>
 #include <editeng/brushitem.hxx>
+#include <editeng/frmdir.hxx>
 #include <fmtpdsc.hxx>
 #include <fmtornt.hxx>
 #include <fmtfsize.hxx>
@@ -52,6 +53,7 @@
 #include <xmloff/xmlprhdl.hxx>
 #include "xmlithlp.hxx"
 #include <com/sun/star/uno/Any.hxx>
+#include <sal/log.hxx>
 
 using ::editeng::SvxBorderLine;
 using namespace ::com::sun::star;
@@ -905,14 +907,25 @@ bool SvXMLImportItemMapper::PutXMLValue(
 
         case RES_FRAMEDIR:
         {
-            std::unique_ptr<XMLPropertyHandler> pWritingModeHandler =
-                XMLPropertyHandlerFactory::CreatePropertyHandler(
-                    XML_TYPE_TEXT_WRITING_MODE_WITH_DEFAULT );
-            Any aAny;
-            bOk = pWritingModeHandler->importXML( rValue, aAny,
-                                                      rUnitConverter );
-            if( bOk )
-                bOk = rItem.PutValue( aAny, 0 );
+            if (IsXMLToken(rValue, XML_BT_LR))
+            {
+                // Read bt-lr from the extension namespace, handle other values
+                // below.
+                Any aAny;
+                aAny <<= static_cast<sal_uInt16>(SvxFrameDirection::Vertical_LR_BT);
+                bOk = rItem.PutValue(aAny, 0);
+            }
+            else
+            {
+                std::unique_ptr<XMLPropertyHandler> pWritingModeHandler =
+                    XMLPropertyHandlerFactory::CreatePropertyHandler(
+                        XML_TYPE_TEXT_WRITING_MODE_WITH_DEFAULT );
+                Any aAny;
+                bOk = pWritingModeHandler->importXML( rValue, aAny,
+                                                          rUnitConverter );
+                if( bOk )
+                    bOk = rItem.PutValue( aAny, 0 );
+            }
         }
         break;
 

sw/source/filter/xml/xmlitemm.cxx

@@ -282,6 +282,7 @@ SvXMLItemMapEntry const aXMLTableCellItemMap[] =
 
     // RES_FRAMEDIR
     MAP_ENTRY( STYLE, WRITING_MODE, RES_FRAMEDIR, 0 ),
+    MAP_ENTRY( LO_EXT, WRITING_MODE, RES_FRAMEDIR, 0 ),
 
     M_END
 };

xmloff/source/core/xmltoken.cxx

@@ -2187,6 +2187,7 @@ namespace xmloff { namespace token {
 
         TOKEN( "rl-tb",                           XML_RL_TB ),
         TOKEN( "tb-lr",                           XML_TB_LR ),
+        TOKEN( "bt-lr",                           XML_BT_LR ),
         TOKEN( "lr",                              XML_LR ),
         TOKEN( "rl",                              XML_RL ),
         TOKEN( "tb",                              XML_TB ),

xmloff/source/token/tokens.txt

@@ -2089,6 +2089,7 @@ stock-gain-marker
 stock-range-line
 rl-tb
 tb-lr
+bt-lr
 lr
 rl
 tb