sax: add methods to duplicate current top marker and reapply it later

The need for this is ooxml: we need to have a duplicate entry (rPr)
like this:
<p>
  <pPr>
     <rPr>...</rPr>
  </pPr>
  <r>
     <rPr>...</rPR>
  </r>
</p>
This patch allows to do that by setting aside a copy of the <rPr> line,
and then merging the copy when needed.

Change-Id: I3868a822aa9e5210f3d814c68398a38f95072cd5
Reviewed-on: https://gerrit.libreoffice.org/1648Reviewed-by: Noel Power <noel.power@suse.com>
Tested-by: Noel Power <noel.power@suse.com>

sax/inc/sax/fshelper.hxx

@@ -142,6 +142,8 @@ public:
     void mark( ::com::sun::star::uno::Sequence< sal_Int32 > aOrder =
             ::com::sun::star::uno::Sequence< sal_Int32 >() );
     void mergeTopMarks( MergeMarksEnum eMergeType = MERGE_MARKS_APPEND );
+    void copyTopMarkPush();
+    void copyTopMarkPop();
 
     /*
       Now create all the overloads in a typesafe way (i.e. without varargs) by creating a number of overloads

sax/source/tools/fastserializer.cxx

@@ -265,6 +265,20 @@ namespace sax_fastparser {
         }
     }
 
+    void FastSaxSerializer::copyTopMarkPush()
+    {
+        assert (!maMarkStack.empty());
+        maSavedMarkStack.push(boost::shared_ptr< ForMerge > ( new ForMerge(*maMarkStack.top())));
+    }
+
+    void FastSaxSerializer::copyTopMarkPop()
+    {
+        assert (!maSavedMarkStack.empty());
+        maMarkStack.push(maSavedMarkStack.top());
+        mergeTopMarks();
+        maSavedMarkStack.pop();
+    }
+
     void FastSaxSerializer::writeBytes( const Sequence< ::sal_Int8 >& aData ) throw ( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException )
     {
         if ( maMarkStack.empty() )

sax/source/tools/fastserializer.hxx

@@ -145,6 +145,8 @@ public:
         @see mark()
      */
     void mergeTopMarks( sax_fastparser::MergeMarksEnum eMergeType = sax_fastparser::MERGE_MARKS_APPEND );
+    void copyTopMarkPush();
+    void copyTopMarkPop();
 
 private:
     ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream > mxOutputStream;
@@ -203,6 +205,7 @@ private:
     };
 
     ::std::stack< boost::shared_ptr< ForMerge > > maMarkStack;
+    ::std::stack< boost::shared_ptr< ForMerge > > maSavedMarkStack;
 
     void writeFastAttributeList( const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastAttributeList >& Attribs );
     void write( const ::rtl::OUString& s );

sax/source/tools/fshelper.cxx

@@ -162,6 +162,16 @@ void FastSerializerHelper::mergeTopMarks( MergeMarksEnum eMergeType )
     mpSerializer->mergeTopMarks( eMergeType );
 }
 
+void FastSerializerHelper::copyTopMarkPush()
+{
+    mpSerializer->copyTopMarkPush();
+}
+
+void FastSerializerHelper::copyTopMarkPop()
+{
+    mpSerializer->copyTopMarkPop();
+}
+
 FastAttributeList * FastSerializerHelper::createAttrList()
 {
     return new FastAttributeList( mxTokenHandler );