tdf#112520 RTF export: write ZOrder only for toplevel shapes

RTF export at the moment exports children of group shapes as a flat
shape list. This means that the order inside the group shape is not
relevant for the toplevel ZOrder, so just don't write it.

(cherry picked from commit 2b920bdc)

Reviewed-on: https://gerrit.libreoffice.org/61904Tested-by: Xisco Faulí <xiscofauli@libreoffice.org>
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 1c6bea8e)

Change-Id: I870707cb28c2f177c0e5d9cf5328260e76b661f3

sw/qa/extras/rtfexport/rtfexport3.cxx

@@ -16,6 +16,7 @@
 #include <com/sun/star/text/XPageCursor.hpp>
 #include <com/sun/star/text/XTextViewCursorSupplier.hpp>
 #include <com/sun/star/text/XTextColumns.hpp>
+#include <com/sun/star/text/TextContentAnchorType.hpp>
 #include <com/sun/star/text/XTextRangeCompare.hpp>
 
 class Test : public SwModelTestBase
@@ -152,6 +153,26 @@ DECLARE_RTFEXPORT_TEST(testTdf117505, "tdf117505.odt")
                          getProperty<sal_Int32>(xFirstPage, "HeaderHeight"));
 }
 
+DECLARE_RTFEXPORT_TEST(testTdf112520, "tdf112520.docx")
+{
+    if (!mbExported)
+        return;
+
+    // Assert that the white shape is on top of the yellow one.
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(0xffff00),
+                         getProperty<sal_Int32>(getShape(2), "FillColor"));
+    CPPUNIT_ASSERT_EQUAL(text::TextContentAnchorType_AT_CHARACTER,
+                         getProperty<text::TextContentAnchorType>(getShape(2), "AnchorType"));
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(0xffffff),
+                         getProperty<sal_Int32>(getShape(3), "FillColor"));
+    // Without the accompanying fix in place, this test would have failed with
+    // 'expected: 4, actual: 2'.
+    // This means the draw page was 0/at-char/white, 1/at-char/yellow, 2/at-page/white,
+    // instead of the good 0/at-page/white, 1/at-char/yellow, 2/at-char/white.
+    CPPUNIT_ASSERT_EQUAL(text::TextContentAnchorType_AT_CHARACTER,
+                         getProperty<text::TextContentAnchorType>(getShape(3), "AnchorType"));
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sw/source/filter/ww8/rtfsdrexport.cxx

@@ -87,10 +87,11 @@ void RtfSdrExport::CloseContainer()
 sal_uInt32 RtfSdrExport::EnterGroup(const OUString& /*rShapeName*/,
                                     const tools::Rectangle* /*pRect*/)
 {
+    m_bInGroup = true;
     return GenerateShapeId();
 }
 
-void RtfSdrExport::LeaveGroup() { /* noop */}
+void RtfSdrExport::LeaveGroup() { m_bInGroup = false; }
 
 void RtfSdrExport::AddShape(sal_uInt32 nShapeType, ShapeFlag nShapeFlags, sal_uInt32 /*nShapeId*/)
 {
@@ -556,8 +557,13 @@ sal_Int32 RtfSdrExport::StartShape()
     m_rAttrOutput.RunText().append(OOO_STRING_SVTOOLS_RTF_SHPBYIGNORE);
 
     // Write ZOrder.
-    m_rAttrOutput.RunText().append(OOO_STRING_SVTOOLS_RTF_SHPZ);
-    m_rAttrOutput.RunText().append(OString::number(m_pSdrObject->GetOrdNum()));
+    if (!m_bInGroup)
+    {
+        // Order inside the group shape is not relevant for the flat shape list
+        // we write.
+        m_rAttrOutput.RunText().append(OOO_STRING_SVTOOLS_RTF_SHPZ);
+        m_rAttrOutput.RunText().append(OString::number(m_pSdrObject->GetOrdNum()));
+    }
 
     for (auto it = m_aShapeProps.rbegin(); it != m_aShapeProps.rend(); ++it)
         lcl_AppendSP(m_rAttrOutput.RunText(), (*it).first.getStr(), (*it).second);

sw/source/filter/ww8/rtfsdrexport.hxx

@@ -57,6 +57,8 @@ class RtfSdrExport final : public EscherEx
     /// Remember which shape types we had already written.
     std::unique_ptr<bool[]> m_pShapeTypeWritten;
 
+    bool m_bInGroup = false;
+
 public:
     explicit RtfSdrExport(RtfExport& rExport);
     ~RtfSdrExport() override;