tdf#96480: ODF import: eliminate duplicate cross reference heading bookmarks

7c3c3006deaaaf1bb3f2f4eeeaf11da3bcebe53c is apparently worse than it
appeared at first glance since there are numerous assumptions about
bookmarks, such as that if they were inserted successfully they may be
copied successfully, which isn't the case for duplicate cross reference
bookmarks.

So fix this differently, by eliminating the duplicates and mapping all
reference fields to refer to the surviving bookmark.

It was not possible to do this in SwXBookmark by checking the makeMark()
return as that would raise interesting problems such as it's currently
guaranteed to have 1:1 SwXBoomarks to core Marks so we can't just
connect 2 SwXBookmarks to the same core Mark, and we also can't leave
the SwXBookmark unconnected after attach.

Another alternative would be to temporarily allow inserting the
duplicate bookmarks and then eliminate them after the import, but what
is implemented now is to check from xmloff for duplicates, which is
reasonably simple.

Change-Id: I7ee4854d1c9d8bf74201089cbb7287b1bd8ee3b9

5 files changed, 141 insertions, 12 deletions

diff --git a/xmloff/source/core/xmlimp.cxx b/xmloff/source/core/xmlimp.cxx
index 52b10a96d853..483cc02cb51f 100644
--- a/xmloff/source/core/xmlimp.cxx
+++ b/xmloff/source/core/xmlimp.cxx
@@ -545,6 +545,8 @@ void SAL_CALL SvXMLImport::endDocument()
     //  #i9518# All the stuff that accesses the document has to be done here, not in the dtor,
     //  because the SvXMLImport dtor might not be called until after the document has been closed.
 
+    GetTextImport()->MapCrossRefHeadingFieldsHorribly();
+
     if (mpImpl->mpRDFaHelper.get())
     {
         const uno::Reference<rdf::XRepositorySupplier> xRS(mxModel,
diff --git a/xmloff/source/text/XMLTextMarkImportContext.cxx b/xmloff/source/text/XMLTextMarkImportContext.cxx
index 2ebef98d77d6..a670fdc81390 100644
--- a/xmloff/source/text/XMLTextMarkImportContext.cxx
+++ b/xmloff/source/text/XMLTextMarkImportContext.cxx
@@ -99,10 +99,12 @@ void XMLFieldParamImportContext::StartElement(const css::uno::Reference< css::xm
 XMLTextMarkImportContext::XMLTextMarkImportContext(
     SvXMLImport& rImport,
     XMLTextImportHelper& rHlp,
+    uno::Reference<uno::XInterface> & io_rxCrossRefHeadingBookmark,
     sal_uInt16 nPrefix,
     const OUString& rLocalName )
     : SvXMLImportContext(rImport, nPrefix, rLocalName)
     , m_rHelper(rHlp)
+    , m_rxCrossRefHeadingBookmark(io_rxCrossRefHeadingBookmark)
     , m_bHaveAbout(false)
 {
 }
@@ -202,9 +204,23 @@ void XMLTextMarkImportContext::EndElement()
                         OUString());
                     break;
 
-                case TypeFieldmark:
                 case TypeBookmark:
                     {
+                        // tdf#94804: detect duplicate heading cross reference bookmarks
+                        if (m_sBookmarkName.startsWith("__RefHeading__"))
+                        {
+                            if (m_rxCrossRefHeadingBookmark.is())
+                            {
+                                uno::Reference<container::XNamed> const xNamed(
+                                    m_rxCrossRefHeadingBookmark, uno::UNO_QUERY);
+                                m_rHelper.AddCrossRefHeadingMapping(
+                                    m_sBookmarkName, xNamed->getName());
+                                break; // don't insert
+                            }
+                        }
+                    } // fall through
+                case TypeFieldmark:
+                    {
                         const char *formFieldmarkName=lcl_getFormFieldmarkName(m_sFieldName);
                         bool bImportAsField=((lcl_MarkType)nTmp==TypeFieldmark && formFieldmarkName!=nullptr); //@TODO handle abbreviation cases..
                         // export point bookmark
@@ -225,6 +241,12 @@ void XMLTextMarkImportContext::EndElement()
                             }
                             m_rHelper.popFieldCtx();
                         }
+                        if (TypeBookmark == nTmp
+                            && m_sBookmarkName.startsWith("__RefHeading__"))
+                        {
+                            assert(xContent.is());
+                            m_rxCrossRefHeadingBookmark = xContent;
+                        }
                     }
                     break;
 
@@ -249,8 +271,22 @@ void XMLTextMarkImportContext::EndElement()
                     }
                     break;
 
-                case TypeFieldmarkEnd:
                 case TypeBookmarkEnd:
+                    {
+                        // tdf#94804: detect duplicate heading cross reference bookmarks
+                        if (m_sBookmarkName.startsWith("__RefHeading__"))
+                        {
+                            if (m_rxCrossRefHeadingBookmark.is())
+                            {
+                                uno::Reference<container::XNamed> const xNamed(
+                                    m_rxCrossRefHeadingBookmark, uno::UNO_QUERY);
+                                m_rHelper.AddCrossRefHeadingMapping(
+                                    m_sBookmarkName, xNamed->getName());
+                                break; // don't insert
+                            }
+                        }
+                    } // fall through
+                case TypeFieldmarkEnd:
                 {
                     // get old range, and construct
                     Reference<XTextRange> xStartRange;
@@ -333,6 +369,12 @@ void XMLTextMarkImportContext::EndElement()
                                 }
                                 m_rHelper.popFieldCtx();
                             }
+                            if (TypeBookmarkEnd == nTmp
+                                && m_sBookmarkName.startsWith("__RefHeading__"))
+                            {
+                                assert(xContent.is());
+                                m_rxCrossRefHeadingBookmark = xContent;
+                            }
                         }
                         // else: beginning/end in different XText -> ignore!
                     }
diff --git a/xmloff/source/text/XMLTextMarkImportContext.hxx b/xmloff/source/text/XMLTextMarkImportContext.hxx
index b768c3567221..cc9bdf992330 100644
--- a/xmloff/source/text/XMLTextMarkImportContext.hxx
+++ b/xmloff/source/text/XMLTextMarkImportContext.hxx
@@ -60,8 +60,11 @@ public:
  */
 class XMLTextMarkImportContext : public SvXMLImportContext
 {
-
+private:
     XMLTextImportHelper & m_rHelper;
+
+    css::uno::Reference<css::uno::XInterface> & m_rxCrossRefHeadingBookmark;
+
     OUString m_sBookmarkName;
     OUString m_sFieldName;
     OUString m_sXmlId;
@@ -74,10 +77,10 @@ class XMLTextMarkImportContext : public SvXMLImportContext
 
 public:
 
-
     XMLTextMarkImportContext(
         SvXMLImport& rImport,
         XMLTextImportHelper& rHlp,
+        css::uno::Reference<css::uno::XInterface> & io_rxCrossRefHeadingBookmark,
         sal_uInt16 nPrfx,
         const OUString& rLocalName );
 
diff --git a/xmloff/source/text/txtimp.cxx b/xmloff/source/text/txtimp.cxx
index 2ece1f4b4d32..9afcb432d69f 100644
--- a/xmloff/source/text/txtimp.cxx
+++ b/xmloff/source/text/txtimp.cxx
@@ -25,7 +25,9 @@
 #include <com/sun/star/container/XEnumerationAccess.hpp>
 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
 #include <com/sun/star/style/XStyleFamiliesSupplier.hpp>
+#include <com/sun/star/text/ReferenceFieldSource.hpp>
 #include <com/sun/star/text/XChapterNumberingSupplier.hpp>
+#include <com/sun/star/text/XTextFieldsSupplier.hpp>
 #include <com/sun/star/text/XTextFramesSupplier.hpp>
 #include <com/sun/star/text/XTextGraphicObjectsSupplier.hpp>
 #include <com/sun/star/text/XTextEmbeddedObjectsSupplier.hpp>
@@ -575,6 +577,8 @@ struct XMLTextImportHelper::Impl
 
     OUString m_sCellParaStyleDefault;
 
+    std::unique_ptr<std::map<OUString, OUString>> m_pCrossRefHeadingBookmarkMap;
+
     Impl(       uno::Reference<frame::XModel> const& rModel,
                 SvXMLImport & rImport,
                 bool const bInsertMode, bool const bStylesOnlyMode,
@@ -2797,4 +2801,60 @@ OUString const& XMLTextImportHelper::GetCellParaStyleDefault()
     return m_xImpl->m_sCellParaStyleDefault;
 }
 
+void XMLTextImportHelper::AddCrossRefHeadingMapping(OUString const& rFrom, OUString const& rTo)
+{
+    if (!m_xImpl->m_pCrossRefHeadingBookmarkMap)
+    {
+        m_xImpl->m_pCrossRefHeadingBookmarkMap.reset(new std::map<OUString, OUString>);
+    }
+    m_xImpl->m_pCrossRefHeadingBookmarkMap->insert(std::make_pair(rFrom, rTo));
+}
+
+// tdf#94804: hack to map cross reference fiels that reference duplicate marks
+// note that we can't really check meta:generator for this since the file might
+// be round-tripped by different versions preserving duplicates => always map
+void XMLTextImportHelper::MapCrossRefHeadingFieldsHorribly()
+{
+    if (!m_xImpl->m_pCrossRefHeadingBookmarkMap)
+    {
+        return;
+    }
+
+    uno::Reference<text::XTextFieldsSupplier> const xFieldsSupplier(
+            m_xImpl->m_rSvXMLImport.GetModel(), uno::UNO_QUERY);
+    if (!xFieldsSupplier.is())
+    {
+        return;
+    }
+    uno::Reference<container::XEnumerationAccess> const xFieldsEA(
+            xFieldsSupplier->getTextFields());
+    uno::Reference<container::XEnumeration> const xFields(
+            xFieldsEA->createEnumeration());
+    while (xFields->hasMoreElements())
+    {
+        uno::Reference<lang::XServiceInfo> const xFieldInfo(
+                xFields->nextElement(), uno::UNO_QUERY);
+        if (!xFieldInfo->supportsService("com.sun.star.text.textfield.GetReference"))
+        {
+            continue;
+        }
+        uno::Reference<beans::XPropertySet> const xField(
+                xFieldInfo, uno::UNO_QUERY);
+        sal_uInt16 nType(0);
+        xField->getPropertyValue("ReferenceFieldSource") >>= nType;
+        if (text::ReferenceFieldSource::BOOKMARK != nType)
+        {
+            continue;
+        }
+        OUString name;
+        xField->getPropertyValue("SourceName") >>= name;
+        auto const iter(m_xImpl->m_pCrossRefHeadingBookmarkMap->find(name));
+        if (iter == m_xImpl->m_pCrossRefHeadingBookmarkMap->end())
+        {
+            continue;
+        }
+        xField->setPropertyValue("SourceName", uno::makeAny(iter->second));
+    }
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/xmloff/source/text/txtparai.cxx b/xmloff/source/text/txtparai.cxx
index ffceba4cfbbf..0d4b7e3c83e1 100644
--- a/xmloff/source/text/txtparai.cxx
+++ b/xmloff/source/text/txtparai.cxx
@@ -68,8 +68,28 @@ using namespace ::xmloff::token;
 using ::com::sun::star::container::XEnumerationAccess;
 using ::com::sun::star::container::XEnumeration;
 
-class XMLHints_Impl : public std::vector<std::unique_ptr<XMLHint_Impl>> {};
+class XMLHints_Impl
+{
+private:
+    std::vector<std::unique_ptr<XMLHint_Impl>> m_Hints;
+    uno::Reference<uno::XInterface> m_xCrossRefHeadingBookmark;
+
+public:
+    void push_back(std::unique_ptr<XMLHint_Impl> pHint)
+    {
+        m_Hints.push_back(std::move(pHint));
+    }
 
+    std::vector<std::unique_ptr<XMLHint_Impl>> const& GetHints()
+    {
+        return m_Hints;
+    }
+
+    uno::Reference<uno::XInterface> & GetCrossRefHeadingBookmark()
+    {
+        return m_xCrossRefHeadingBookmark;
+    }
+};
 
 XMLCharContext::XMLCharContext(
         SvXMLImport& rImport,
@@ -253,10 +273,10 @@ XMLEndReferenceContext_Impl::XMLEndReferenceContext_Impl(
     if (XMLStartReferenceContext_Impl::FindName(GetImport(), xAttrList, sName))
     {
         // search for reference start
-        sal_uInt16 nCount = rHints.size();
+        sal_uInt16 nCount = rHints.GetHints().size();
         for(sal_uInt16 nPos = 0; nPos < nCount; nPos++)
         {
-            XMLHint_Impl *const pHint = rHints[nPos].get();
+            XMLHint_Impl *const pHint = rHints.GetHints()[nPos].get();
             if ( pHint->IsReference() &&
                  sName.equals( static_cast<XMLReferenceHint_Impl *>(pHint)->GetRefName()) )
             {
@@ -1102,10 +1122,10 @@ void XMLIndexMarkImportContext_Impl::StartElement(
             if (!sID.isEmpty())
             {
                 // if we have an ID, find the hint and set the end position
-                sal_uInt16 nCount = m_rHints.size();
+                sal_uInt16 nCount = m_rHints.GetHints().size();
                 for(sal_uInt16 nPos = 0; nPos < nCount; nPos++)
                 {
-                    XMLHint_Impl *const pHint = m_rHints[nPos].get();
+                    XMLHint_Impl *const pHint = m_rHints.GetHints()[nPos].get();
                     if ( pHint->IsIndexMark() &&
                          sID.equals(
                              static_cast<XMLIndexMarkHint_Impl *>(pHint)->GetID()) )
@@ -1629,6 +1649,7 @@ SvXMLImportContext *XMLImpSpanContext_Impl::CreateChildContext(
     case XML_TOK_TEXT_BOOKMARK_END:
         pContext = new XMLTextMarkImportContext( rImport,
                                                  *rImport.GetTextImport().get(),
+                                                 rHints.GetCrossRefHeadingBookmark(),
                                                  nPrefix, rLocalName );
         break;
 
@@ -1637,6 +1658,7 @@ SvXMLImportContext *XMLImpSpanContext_Impl::CreateChildContext(
     case XML_TOK_TEXT_FIELDMARK_END:
         pContext = new XMLTextMarkImportContext( rImport,
                                                  *rImport.GetTextImport().get(),
+                                                 rHints.GetCrossRefHeadingBookmark(),
                                                  nPrefix, rLocalName );
         break;
 
@@ -2045,11 +2067,11 @@ XMLParaContext::~XMLParaContext()
         }
     }
 
-    if( pHints && !pHints->empty() )
+    if (pHints && !pHints->GetHints().empty())
     {
-        for( size_t i=0; i<pHints->size(); i++ )
+        for (size_t i = 0; i < pHints->GetHints().size(); ++i)
         {
-            XMLHint_Impl *const pHint = (*pHints)[i].get();
+            XMLHint_Impl *const pHint = pHints->GetHints()[i].get();
             xAttrCursor->gotoRange( pHint->GetStart(), sal_False );
             xAttrCursor->gotoRange( pHint->GetEnd(), sal_True );
             switch( pHint->GetType() )